A dust-proof curtain device of a series of pulley blocks

Abstract

The utility model discloses a series of trolley type dustproof sky screen device, including the starting stand of assembling section, standard section starting stand, standard section intermediate stand, standard section terminal stand, the track beam of bearing longitudinal and transverse load, the traction head car, the trolley, the steel wire rope of traction head car advance, the steel wire rope of back pull head car retreat, the cable guide support stand, three horizontal two longitudinal roller cable guide, the support base of winch, double roller winch, dustproof sky screen steel cable, trolley interval traction steel wire rope. The present application solves the technical bottleneck of dustproof sky screen device in the installation and use process, such as unclear force transmission of connecting node, big friction resistance, big overall quality, low automatic opening and closing efficiency, difficult construction installation and disassembly, low reuse. The device is innovatively designed through the supporting structure system, the trolley connecting part and the transmission traction system, so that the sky screen supporting system installation is standardized, the trolley type connecting node assembly is lightweight, and the sky screen unfolding and retracting process is mechanical control automation and positioning precision.

Description

Technical Field

[0001] This utility model relates to a dust suppression device for foundation pit excavation in the field of dust control technology in building construction, specifically a series pulley-type dust suppression canopy device. Background Technology

[0002] During foundation pit construction, earthwork excavation inevitably generates a large amount of dust. To effectively suppress dust, construction companies typically employ dust-proof awnings as a crucial measure. A dust-proof awning is a large barrier covering the construction site, effectively blocking wind-borne dust and reducing the amount of suspended particulate matter in the air. Installing dust-proof awnings significantly reduces dust pollution at the construction site, protecting worker health while minimizing the impact on the surrounding environment and public life, ensuring that construction activities and environmental protection are given equal importance, thus achieving green construction. Traditional dust-proof awnings are mostly static structures, difficult to move or open / close once erected. When large components or heavy equipment need to be hoisted across the work area, often only part of the awning can be removed or an opening left, increasing operational safety risks and rendering the dust-proof effect ineffective. Current dust-proof awning equipment has undergone appropriate improvements, allowing for sliding. That is, horizontal I-beams are fixed horizontally on both sides of the foundation pit, and the steel wires of the dustproof canopy are horizontally fastened to the flanges of the I-beams through U-shaped wheel slots to achieve the purpose of fixing each section of the canopy. Each bundle of the canopy needs to be moved by the traction of the rope, either by manually pulling each U-shaped wheel slot or by adding an extra set of traction ropes on the top of the canopy to connect each U-shaped wheel slot to achieve the purpose of moving the dustproof canopy. However, the current dustproof canopy equipment has many shortcomings: (1) The connection nodes are complex, the force transmission path of the components is unclear, and the overall stability is poor. The U-shaped wheel slot connection is a semi-rigid connection. The gravity of the canopy and the horizontal tension of the steel wires are transmitted to the flanges of the I-beams through the U-shaped wheel slots, which causes the flanges of the I-beams to generate out-of-plane tension and torque, causing buckling instability of the flanges of the I-beams, resulting in the risk of the U-shaped wheel slots being pulled off, which seriously affects construction safety. (2) The frictional resistance of the connection nodes is large, the traction and sliding are difficult, and the working efficiency is low. The U-shaped wheel slot is secured to the flange of the I-beam by horizontally setting pulleys. Due to the large weight of the U-shaped wheel slot, it is prone to sagging, which causes solid surface friction between the U-shaped steel and the flange of the I-beam, greatly increasing the frictional resistance and making traction difficult. The contact wear between the U-shaped steel and the I-beam is severe. The traction method is not along the path direction, but at an angle, which inevitably increases the wheel resistance. (3) The welding process of the steel structure supporting both sides is complicated and the U-shaped wheel slot is bulky, which makes construction, installation and disassembly difficult, resulting in low assembly efficiency and long construction time. (4) The system has a low degree of standardization and low reuse rate. A large number of fixed connecting parts are discarded after dismantling due to high wear and inconsistent specifications, resulting in resource waste and increased costs.

[0003] With energy conservation, emission reduction, and green construction becoming important goals in the construction industry, the development of a dustproof device that can be quickly assembled, has clear structural mechanics, reliable connection performance, low frictional resistance, can be automatically opened and closed mechanically, is easy to install and disassemble, and whose components can be reused has become an urgent need in the industry. Utility Model Content

[0004] Therefore, to address the aforementioned shortcomings, this utility model provides a series-connected trolley-type dustproof canopy device. Its main purpose is to solve the technical bottlenecks encountered in the installation and use of dustproof canopy devices, such as unclear force transmission at connection nodes, high frictional resistance, large overall mass, low automatic opening and closing efficiency, difficult construction, installation, and disassembly, and low reusability. This device, through innovative design of the support structure system, trolley connection components, and transmission traction system, achieves standardized prefabrication of the canopy support system, lightweight assembly of trolley-type connection nodes, and automated mechanical control and precise positioning of the canopy's unfolding and retraction processes.

[0005] This utility model is implemented as follows: a series pulley-type dustproof canopy device is constructed, characterized in that: the device comprises an assembly section starting column (1), a standard section starting column (2), a standard section intermediate column (3), a standard section ending column (4), a track beam (5) bearing longitudinal and transverse loads, a traction head car (6), an intermediate pulley (7), a traction head car forward steel wire rope (8), a pullback head car backward steel wire rope (9), a cable guide support column (10), a three-horizontal and two-longitudinal roller cable guide (11), a winch support base (12), a double-roller winch (13), a dustproof canopy steel wire rope unit (14), and a pulley traction steel wire rope (15); the assembly section... The starting column (1) and the starting column (2) of the standard section are installed and fixed in parallel on both sides of the assembly area (17); the starting column (2), the intermediate column (3), and the ending column (4) of the standard section are installed and fixed in parallel on both sides of the pit area (16); the track beam (5) bearing the longitudinal and transverse loads is fixed on the upper part of the starting column (1), the starting column (2), the intermediate column (3), and the ending column (4); the traction trolley (6) and the intermediate trolley (7) are embedded in the track beam (5) bearing the longitudinal and transverse loads; one end of the forward steel wire rope (8) of the traction trolley is connected to the front end of the traction trolley (6). One end passes through the three horizontal and two vertical roller guides (11) and is connected to the double roller winch (13); the double roller winch (13) pulls back the steel wire rope (8) that leads the tractor forward, pulling the tractor (6) forward; one end of the pullback steel wire rope (9) is connected to the front end of the tractor (6), and the other end passes through the three horizontal and two vertical roller guides (11) and is connected to the double roller winch (13); the double roller winch (13) pulls back the pullback steel wire rope (9), pulling the tractor (6) backward; the guide support column (10) is installed parallel to and fixed on both sides of the assembly area (17), and installed in front of the starting column (1) of the assembly section in a straight line. Online; the three horizontal and two vertical roller guides (11) are fixed on the guide support column (10); the winch support base (12) is installed and fixed in parallel on both sides of the assembly area (17), and installed on a straight line in front of the guide support column (10); the double roller winch (13) is fixed on the winch support base (12); the dustproof canopy wire rope unit (14) is fixed on the traction head car (6) and the intermediate pulley (7); the two ends of the sliding car traction wire rope (15) are fixed between the traction head car (6) and the intermediate pulley (7) respectively. When the traction head car (6) moves forward, the sliding car traction wire rope (15) is straightened, which drives the intermediate pulley (7) forward.

[0006] According to the present application, a series pulley-type dustproof canopy device is characterized in that: the assembly section starting column (1) consists of a channel steel long-limb column A (101), a channel steel short-limb column A (102), a horizontal diaphragm A (103), a horizontal diaphragm B (104), a horizontal diaphragm C (105), a horizontal diaphragm D (106), a pulley A (107), a pulley through-core crossbar A (108), a double-clamp nut A (109), an angle steel horizontal diaphragm A (110), a double-clamp finished pulley A (111), a double-clamp finished pulley B (112), an assembly section L-shaped steel A (501), an assembly section L-shaped steel B (502), an assembly section C-shaped steel (503), and an anti-torsion clamp ( 510), a set of high-strength bolts B (512); the long-limb channel steel column A (101) and the short-limb channel steel column A (102) are welded together by diaphragm A (103), diaphragm B (104), diaphragm C (105), diaphragm D (106) and angle steel diaphragm A (110) to form a lattice support system; the pulley through-core crossbar A (108) passes through pulley A (107), and its two ends are fixed to the long-limb channel steel column A (101) and the short-limb channel steel column A (102) with double-clamp nuts A (109), and to the lower side of diaphragm C (105) and diaphragm D (106); the double-clamp finished pulley A (111) is welded and fixed to The upper part of the center line of the angle steel diaphragm A (110); the double-clamp finished pulley B (112) is welded and fixed to the side of the center line of the diaphragm C (105); the L-shaped steel section A (501) is fixed to the top of the short-limb column A (102) of the channel steel by four sets of high-strength bolts B (512), and the top edge of the L-shaped steel section A (501) is flush with the top of the short-limb column A (102); the L-shaped steel section L (502) is fixed to the long-limb column A (101) of the channel steel by four sets of high-strength bolts B (512), and the top elevation is the same as that of the L-shaped steel section A (501); the C-shaped steel section C (503) is fixed to the long-limb column A (101) of the channel steel by four sets of high-strength bolts B (511). The top edge of the C-shaped steel section (503) is flush with the top of the long-limb column A (101) of the channel steel. The anti-torsion clamp (510) is fixed on one side to the top of the long-limb column A (101) of the channel steel by a set of high-strength bolts C (514), and on the other side by a set of high-strength bolts D (515). The forward steel wire rope (8) of the traction head car is limited by pulley A (107) and double-clamp finished pulley B (112) to facilitate its extension and shortening. The backward steel wire rope (9) of the pullback head car is limited by double-clamp finished pulley A (111) to facilitate its extension and shortening.

[0007] According to the present application, a series trolley-type dustproof canopy device is characterized in that: the standard section starting column (2) consists of a channel steel long-limb column B (201), a channel steel short-limb column B (202), a horizontal diaphragm E (203), a horizontal diaphragm F (204), a horizontal diaphragm G (205), a horizontal diaphragm H (206), a pulley B (211), a pulley through-core crossbar B (208), a double clamp nut B (207), an assembly section L-shaped steel A (501), an assembly section L-shaped steel B (502), a standard section L-shaped steel A (504), a standard section L-shaped steel B (505), an assembly section C-shaped steel (503), a standard section C-shaped steel (506), an anti-torsion clamp (510), and a set of high-strength fixing bolts B ( 512), limiting steel plate A (209), limiting high-strength bolt A (210); the long-limb channel steel column B (201) and the short-limb channel steel column B (202) are welded together by diaphragm E (203), diaphragm F (204), diaphragm G (205), and diaphragm H (206) to form a lattice support system; the pulley through-core crossbar B (208) passes through pulley B (211), and its two ends are fixed to the long-limb channel steel column B (201) and the short-limb channel steel column B (202) with double-clamp nuts B (207), and the lower side of diaphragm G (205) and diaphragm H (206); the assembled section L-shaped steel A (501) and the standard section L-shaped steel A (504) are respectively connected by two sets of High-strength bolts B (512) are fixed to the top of the short-limb channel steel column B (202). The top edges of the assembled L-shaped steel section A (501) and the standard L-shaped steel section A (504) are flush with the top of the short-limb channel steel column B (202). The gap between the assembled L-shaped steel section A (501) and the standard L-shaped steel section A (504) is controlled within 2mm. The assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) are fixed to the long-limb channel steel column B (201) by two sets of high-strength bolts B (512). The top elevation is the same as that of the assembled L-shaped steel section A (501) and the standard L-shaped steel section A (504). The gap between the assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) is controlled within 2mm. Within m; the assembled section C-shaped steel (503) and the standard section C-shaped steel (506) are fixed to the top of the channel steel long limb column B (201) by a set of high-strength bolts A (511), and the top edge of the assembled section C-shaped steel (503) and the standard section C-shaped steel (506) is flush with the top of the channel steel long limb column B (201); one side of the anti-torsion clamp (510) is fixed to the top of the channel steel long limb column B (201) by a set of high-strength bolts C (514), and the other side is clamped on the assembled section C-shaped steel (503) and the standard section C-shaped steel (506) by a set of high-strength bolts D (515); the forward steel wire rope (8) of the traction head car is limited by pulley B (211) to facilitate its extension and shortening;The limiting steel plate A (209) is fixed to the ends of the L-shaped steel A (501) and L-shaped steel B (502) of the assembly section near the starting column (2) of the standard section by limiting high-strength bolts A (210).

[0008] According to the present application, a series trolley-type dustproof canopy device is characterized in that: the composition of the intermediate column (3) of the standard section includes a long-limb channel steel column C (301), a short-limb channel steel column C (302), a horizontal diaphragm I (303), a horizontal diaphragm J (304), a pulley C (305), a pulley through-bar C (306), a double-clamp nut C (307), a standard section L-shaped steel A (504), a standard section L-shaped steel B (505), a standard section C-shaped steel (506), an anti-torsion clamp (510), and a set of high-strength fixing bolts B (512); the channel steel The long-limb column C (301) and the short-limb channel steel column C (302) are welded together by diaphragm I (303) and diaphragm J (304) to form a lattice support system; the pulley through-core crossbar C (306) passes through pulley C (305), and its two ends are fixed to the long-limb channel steel column C (301) and the short-limb channel steel column C (302) with double-clamp nuts C (307), and to the lower side of the front and rear diaphragm J (304); the adjacent two-span standard section L-shaped steel A (504) is fixed to the short-limb channel steel column C by two sets of high-strength bolts B (512). (302) At the top, the top edge of the standard L-shaped steel section A (504) is flush with the top of the short-limb column C (302) of the channel steel, and the gap between the standard L-shaped steel sections A (504) of the two adjacent spans is controlled within 2mm; the standard L-shaped steel sections B (505) of the two adjacent spans are fixed to the long-limb column C (301) of the channel steel by two sets of high-strength bolts B (512), and the top elevation is the same as that of the standard L-shaped steel section A (504). The gap between the assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) is controlled within 2mm; the standard L-shaped steel sections C (504) of the two adjacent spans are also controlled within 2mm. 6) The high-strength bolts A (511) are fixed to the top of the long-limb column C (301) of the channel steel, and the top edge of the adjacent two standard sections of C-shaped steel (506) is flush with the top of the long-limb column C (301); the anti-torsion clamp (510) is fixed to the top of the long-limb column C (301) of the channel steel on one side by the high-strength bolts C (514), and the other side is clamped to the standard section of C-shaped steel (506) by the high-strength bolts D (515); the forward wire rope (8) of the traction head car is limited by the pulley C (305) to facilitate its extension and shortening.

[0009] According to the present application, a series trolley-type dustproof canopy device is characterized in that: the standard section end column (4) is composed of channel steel long-limb column D (401), channel steel short-limb column D (402), horizontal diaphragm K (403), horizontal diaphragm L (404), horizontal diaphragm M (405), horizontal diaphragm N (406), pulley D (409), pulley through-core crossbar D (407), double-clamp nut D (408), angle steel horizontal diaphragm B (411), double-clamp finished pulley C (410), double-clamp finished pulley D (412), standard section end span L-shaped steel A (507), standard section end span L-shaped steel B (508), standard section end span C-shaped steel (509), anti-torsion clamp (510), and a set of fixing high-strength bolts B ( 512), limiting steel plate B (413), limiting high-strength bolt B (414); the long-limb channel steel column D (401) and the short-limb channel steel column D (402) are welded together by diaphragm K (403), diaphragm L (404), diaphragm M (405), diaphragm N (406) and angle steel diaphragm B (411) to form a lattice support system; the pulley through-core crossbar D (407) passes through pulley D (409), and its two ends are fixed to the long-limb channel steel column D (401) and the short-limb channel steel column D (402) with double-clamp nuts D (408), and to the lower side of diaphragm M (405) and diaphragm N (406); the double-clamp finished pulley D (412) is welded and fixed in the angle steel diaphragm B (411). Online section; the double-clamp finished pulley C (410) is welded and fixed to the side of the center line of the transverse diaphragm M (405); the standard section tail span L-shaped steel A (507) is fixed to the top of the channel steel short limb column D (402) by 4 sets of fixed high-strength bolts B (512), and the top edge of the standard section tail span L-shaped steel A (507) is flush with the top of the channel steel short limb column D (402); the standard section tail span L-shaped steel B (508) is fixed to the channel steel long limb column D (401) by 4 sets of fixed high-strength bolts B (512), and the top elevation is the same as that of the standard section tail span L-shaped steel A (507); the standard section tail span C-shaped steel (509) is fixed to the top of the channel steel long limb column D (401) by a set of fixed high-strength bolts B (512), and ... top edge of the standard section tail span C-shaped steel (509) is flush with the top of the channel steel short limb column D (402); the standard section tail span C-shaped steel (509) is fixed to the top of the channel steel long limb column D (401) by 4 sets of fixed high-strength bolts B (512), and the top edge of the standard section tail span C-shaped steel (509) is flush with the top of the channel steel short limb column D (401), and the top edge of the standard section tail span C-shaped steel (509) is flush with the top of the channel steel short limb column D (401), and the top edge of the standard section tail span C-shaped steel (509) is fixed to the top of the channel steel long limb 09) The top edge is flush with the top of the long-limb column D (401) of the channel steel; the anti-torsion clamp (510) is fixed on one side of the long-limb column D (401) of the channel steel by a set of high-strength bolts C (514), and on the other side by a set of high-strength bolts D (515) on the C-shaped steel (509) of the end span of the standard section; the forward steel wire rope (8) of the traction head car is limited by pulley D (409), double-clamp finished pulley C (410), and double-clamp finished pulley D (412) to facilitate its extension and shortening; the limiting steel plate B (413) is fixed by limiting high-strength bolts B (414) to the end of the L-shaped steel A (507) and L-shaped steel B (508) of the end span of the standard section near the end column (4) of the standard section.Limiting steel plate A (209) is fixed to the ends of L-shaped steel A (501) and L-shaped steel B (502) of the assembly section near the starting column (2) of the standard section by limiting high-strength bolts A (210).

[0010] According to the present application, a series trolley-type dustproof canopy device is characterized in that: the traction vehicle comprises a trolley steel plate body (601), a traction vehicle annular screw (602), a transverse four-wheel solid support frame A (603), a trolley wheel axle A (604), a trolley wheel A (605), a trolley wheel B (606), a threaded round short rod A (607), a collision-resistant steel block A (608), a buffer rubber block A (609), a front lug (610), a bottom lug (611), and a side lug (612); the trolley steel plate body (601) is an open-type lightweight body, which serves as a force-transmitting node component for bearing the dustproof canopy; One threaded hole is provided at the top, and four wheel axle threaded holes are provided on the front and rear sides. The traction head car's circular screw (602) is threaded at both the middle and the end. The circular screw is manually screwed through the upper threaded hole of the trolley steel plate body (601) to fix the middle of the traction head car's circular screw (602) to the upper threaded hole of the trolley steel plate body (601). The end of the traction head car's circular screw (602) is screwed into the threaded hole of the transverse four-wheel solid support frame A (603) for fixation. The trolley wheel axle A (604) is a threaded screw shaft in the middle. It is screwed through the wheel axle threaded hole of the trolley steel plate body (601) for fixation. Wheel A (605) and trolley wheel B (606) are respectively fixed to both ends of trolley wheel axle A (604); the other three wheels are assembled in the same way as this method, forming a 4-wheel trolley; the two threaded round short rods A (607) are respectively welded to the front and rear sides of the trolley steel plate body (601), with the same elevation; the anti-collision steel block A (608) has a threaded hole in the middle and is fixed to the threaded round short rod A (607) by screwing; the buffer rubber block A (609) is glued to the anti-collision steel block A (608); the front end ear (610) is welded to the front side of the trolley steel plate body (601); the bottom ear (611) The side lugs (612) are welded to the bottom rear side of the trolley steel plate body (601); the side lugs (612) are welded to the bottom rear edge of the trolley steel plate body (601); the traction head car (6) and the intermediate trolley (7) are inserted into the assembly section L-shaped steel A (501) and assembly section L-shaped steel B (502) by manual pushing, and the trolley wheels A (605) and B (606) of the head car trolley and the trolley wheels C (705) and D (706) of the intermediate trolley are stably locked in the assembly section L-shaped steel A (501) and assembly section L-shaped steel B (502) so that all trolleys can move stably back and forth on the track beam (5) which bears the longitudinal and transverse loads.

[0011] According to the present application, a series trolley-type dustproof canopy device is characterized in that: the intermediate trolley (7) comprises a trolley body (701), an intermediate trolley annular screw (702), a transverse four-wheel solid support frame B (703), a trolley wheel axle B (704), a trolley wheel C (705), a trolley wheel D (706), a threaded round short rod B (707), an anti-collision steel block B (708), a buffer rubber block B (709), a front side lug (710), a rear side lug (711), and a clamping pulley (712); The trolley body (701) is a lightweight, perforated body, serving as a force-transmitting node component for supporting the dustproof canopy. It has one threaded hole at the top and four threaded axle holes on the front and rear sides. The middle trolley annular screw (702) has threads at both its center and end. The annular screw is manually screwed through the threaded hole at the top of the trolley body (701), fixing the middle of the middle trolley annular screw (702) to the threaded hole at the top of the trolley body (701). The end of the middle trolley annular screw (702) is screwed into the transverse four-wheel solid support frame. The wheel axle B (703) is fixed in the screw hole; the pulley wheel axle B (704) is a threaded screw shaft in the middle, which is fixed by screwing through the wheel axle thread hole of the pulley body (701). The pulley wheel C (705) and pulley wheel D (706) are fixed to the two ends of the pulley wheel axle B (704) respectively; the assembly method of the other 3 wheels is the same as this method, and after forming, it is a 4-wheel pulley mode; the two threaded round short rods B (707) are welded to the front and rear sides of the pulley body (701) respectively, with the same elevation; the anti-collision steel block B (7 08) A threaded hole is made in the middle and fixed to the threaded short rod B (707) by screwing; the buffer rubber block B (709) is glued to the anti-collision steel block B (708); the front side ear (710) is welded to the bottom edge of the front side of the trolley body (701); the rear side ear (711) is welded to the bottom edge of the rear side of the trolley body (701); the clamping pulley (712) is fixed to the bottom middle of the trolley body (701) by fixing bolts (713) to hold the back pull head car retraction steel wire rope (9).

[0012] According to the present application, a series pulley-type dustproof skylight device is characterized in that: a traction system is composed of a traction head car (6), an intermediate pulley (7), a traction head car forward steel wire rope (8), a pullback head car backward steel wire rope (9), and a pulley car traction steel wire rope (15); the traction head car forward steel wire rope (8) is connected to the front end lug (610) of the traction head car by a snap-fit ​​connection, and the traction head car (6) is driven forward by a double roller winch (13); the front end of the pulley car traction steel wire rope (15) is connected to the side lug (612) of the traction head car by a snap-fit ​​connection, and the rear end is connected to the front end side lug (710) of the intermediate pulley by a snap-fit ​​connection, and the pulley car (6) is driven forward by the driving force of the head car; the pulley car traction steel wire rope (15) is tightened by the driving force of the head car forward, and the rear car is driven forward; between two adjacent intermediate pulleys (7), the pulley car traction steel wire rope (15) is connected to the front end of the intermediate pulley by a snap-fit ​​connection. The front end of the guide wire rope (15) is connected to the rear side lug (711) of the intermediate trolley with a snap-fit ​​connection, and the rear end is connected to the front side lug (710) of the intermediate trolley with a snap-fit ​​connection. During the forward movement of the intermediate trolley (7) on the front side, the guide wire rope (15) of the trolley is tightened, which drives the intermediate trolley (7) on the rear side to move forward. The pullback head car retraction wire rope (9) is connected to the bottom lug (611) of the traction head car with a snap-fit ​​connection. The double roller winch (13) is used to retrieve the pullback head car retraction wire rope (9), which drives the traction head car (6) to move backward. During the backward movement of the traction head car (6), the buffer rubber block A (609) of the traction head car is used to collide with the buffer rubber block B (709) of the intermediate trolley. The buffer rubber block B (709) of the intermediate trolley continues to collide with the buffer rubber block B (709) of the subsequent intermediate trolley, which drives the entire trolley system to move backward.

[0013] According to the present application, a series trolley-type dustproof skylight device is characterized in that the connection node between the trolley and the dustproof skylight steel wire rope unit comprises a traction head car circular screw (602), an intermediate trolley circular screw (702), a turnbuckle (1401), a steel wire rope buckle (1402), and a dustproof skylight steel wire rope (1403). One end of the turnbuckle (1401) is connected to the safety buckle of the traction head car's circular screw (602) and the intermediate pulley's circular screw (702) on one side of the foundation pit; the dustproof canopy wire rope (1403) passes through the turnbuckle (1401) of the dustproof canopy wire rope, and is fixed by three wire rope buckles (1402) after bending; the dustproof canopy wire rope (1403) passes through the circular screw of the traction head car's circular screw (602) and the intermediate pulley's circular screw (702) on the other side of the foundation pit, and is fixed by three wire rope buckles (1402) after bending; the three horizontal and two vertical roller guides (11) and the double roller winch (13) form the traction system terminal; the three horizontal and two vertical roller guides (11) have horizontal rollers (11 03, 1104, 1105), longitudinal roller A (1101), longitudinal roller B (1102); the transverse roller A (1103), transverse roller B (1104), transverse roller C (1105), longitudinal roller A (1101), and longitudinal roller B (1102) are bolted to the steel shell (1106) of the cable guide; the forward steel wire rope (8) of the traction head car passes through the hole between the transverse roller A (1103) and the transverse roller B (1104) and is fixed on one side of the drum of the double roller winch (13); the backward steel wire rope (9) of the pullback head car passes through the hole between the transverse roller B (1104) and the transverse roller C (1105) and is fixed on the other side of the drum of the double roller winch (13).

[0014] This utility model has the following advantages: It provides a series trolley-type dustproof canopy device and its construction and operation method; its main purpose is to solve the technical bottlenecks existing in the installation and use of dustproof canopy devices, such as unclear force transmission at connection nodes, high frictional resistance, large overall mass, low automatic opening and closing efficiency, difficult construction, installation and disassembly, and low reusability. Through innovative design of the support structure system, trolley connecting components, and transmission traction system, this device achieves standardized prefabrication of the canopy support system, lightweight assembly of trolley-type connection nodes, and automated mechanical control and precise positioning of the canopy's unfolding and retraction processes.

[0015] This utility model further aims to provide a trolley connection component with low frictional resistance and a clear force transmission path. The component adopts a weight-reduced perforated steel plate body, base screw, traveling roller, cable-fixed horizontal screw, 4-wheel perforated sliding parts, and traction lugs to assemble the trolley component. The prestress and gravity of each section of canopy steel wire, the traction force in the direction of travel, and the impact force in the direction of travel are clearly transmitted to the support system and the transmission traction system through the special structure of the trolley.

[0016] This invention further aims to provide a novel trolley traction system. This system effectively connects the forward guide cable of the lead car, the backward guide cable of the lead car, and the connecting guide cable of the trolleys in three-dimensional space. It utilizes the principle that the lead car drives the rear car forward during traction, the principle of controlling the spacing of each section of the dustproof canopy steel wire using the tension length of the connecting guide cable, and the principle of the lead car pulling back and colliding with the rear car to retract, thus achieving automatic opening and closing of the dustproof canopy. Simultaneously, a traction system driven by a single double-drum winch is designed, innovatively utilizing a 3-horizontal, 2-vertical roller guide cable reversing device to precisely control the release and retraction of the forward and backward traction cables of the lead car, achieving synchronous opening and closing of the canopy and maintaining coordinated control between the trolleys.

[0017] This invention also aims to solve the problem of single-use of existing dust control devices. By adopting standardized production, bolt connection, and modular assembly for all components, each component can be completely recycled and transported to a new construction site for reuse after dismantling, which greatly improves material utilization and reduces environmental pollution and construction costs. Attached Figure Description

[0018] Figure 1 A three-dimensional view of the series-connected trolley-type dustproof canopy device; Figure 2 This is a front elevation view of a single-set guide rail trolley system; Figure 3 A 3D enlarged view of the starting column of the assembly section; Figure 4 A 3D enlarged view of the starting column of the standard section; Figure 5 This is a 3D enlarged view of the central column of the standard section; Figure 6 A 3D enlarged view of the end post of the standard section; Figure 7 Enlarged view of C-shaped steel for torsional reinforcement Figure 8 Drawings of C-shaped steel torsion reinforcement parts Figure 9 Schematic diagram of the trolley limit device Figure 10 Part drawing of the trolley limit device Figure 11 Enlarged view of the head trochlea; Figure 12 Drawing of the head trolley parts; Figure 13 This is a magnified view of the middle trolley; Figure 14 Drawing of the intermediate trolley parts; Figure 15 Schematic diagram of the traction wire rope for the pulley; Figure 16 A schematic diagram of the installation of the pulley assembly section; Figure 17 A schematic diagram showing the connection between the pulley and the steel wire rope of the dustproof canopy. Figure 18 Front view of a three-horizontal, two-vertical roller cable guide; Figure 19 Rear view of a three-horizontal, two-vertical roller cable guide; Figure 20 This is a part drawing of a three-horizontal and two-vertical roller cable guide; Figure 21 This is a schematic diagram of a double roller winch; The components include: 1. Starting column of the assembly section; 2. Starting column of the standard section; 3. Intermediate column of the standard section; 4. Ending column of the standard section; 5. Track beam bearing longitudinal and transverse loads; 6. Traction trolley; 7. Intermediate pulley; 8. Forward steel wire rope of the traction trolley; 9. Reverse steel wire rope of the pulley; 10. Cable guide support column; 11. Three horizontal and two vertical roller cable guides; 12. Winch support base; 13. Double roller winch; 14. Dustproof canopy steel wire rope unit; 15. Traction steel wire rope of the pulley; 16. Excavation pit area; 17. Assembly area. 101. Channel steel long-limb column A; 102. Channel steel short-limb column A; 103. Horizontal diaphragm A; 104. Horizontal diaphragm B; 105. Horizontal diaphragm C; 106. Horizontal diaphragm D; 107. Pulley A; 108. Pulley through-hole crossbar A; 109. Double-clamp nut A; 110. Angle steel horizontal diaphragm A; 111. Double-clamp finished pulley A; 112. Double-clamp finished pulley B. 201 Channel steel long-limb column B, 202 Channel steel short-limb column B, 203 Horizontal diaphragm E, 204 Horizontal diaphragm F, 205 Horizontal diaphragm G, 206 Horizontal diaphragm H, 207 Double-clamp nut B, 208 Pulley through-hole crossbar B, 209 Limiting steel plate A, 210 Limiting high-strength bolt A, 211 Pulley B. 301 Channel steel long-limb column C, 302 Channel steel short-limb column C, 303 Horizontal diaphragm I, 304 Horizontal diaphragm J, 305 Pulley C, 306 Pulley through-core crossbar C, 307 Double clamp nut C; 401 Channel steel long-limb column D, 402 Channel steel short-limb column D, 403 Horizontal diaphragm K, 404 Horizontal diaphragm L, 405 Horizontal diaphragm M, 406 Horizontal diaphragm N, 407 Pulley through-hole crossbar D, 408 Double-clamp nut D, 409 Pulley D, 410 Double-clamp finished pulley C, 411 Angle steel horizontal diaphragm B, 412 Double-clamp finished pulley D, 413 Limiting steel plate B, 414 Limiting high-strength bolt B. 501. L-shaped steel section A (assembly section); 502. L-shaped steel section B (assembly section); 503. C-shaped steel section (assembly section); 504. L-shaped steel section A (standard section); 505. L-shaped steel section B (standard section); 506. C-shaped steel section (standard section); 507. L-shaped steel section A (tail span of standard section); 508. L-shaped steel section B (tail span of standard section); 509. C-shaped steel section C (tail span of standard section); 510. Anti-torsion clamp; 511. Set of high-strength fixing bolts A; 512. Set of high-strength fixing bolts B; 514. Set of high-strength fixing bolts C; 515. Set of high-strength fixing bolts D. 601. Steel plate body of the trolley A; 602. Circular screw of the tractor unit; 603. Transverse four-wheel solid support frame A; 604. Pulley axle A; 605. Pulley wheel A; 606. Pulley wheel B; 607. Threaded short rod A; 608. Anti-collision steel block A; 609. Buffer rubber block A; 610. Front lug; 611. Bottom lug; 612. Side lug. 701. Slide body; 702. Intermediate slide ring screw; 703. Transverse four-wheel solid support frame B; 704. Slide wheel axle B; 705. Slide wheel C; 706. Slide wheel D; 707. Threaded short rod B; 708. Anti-collision steel block B; 709. Buffer rubber block B; 710. Front side lug; 711. Rear side lug; 712. Clamping pulley. 1101 Longitudinal roller A, 1102 Longitudinal roller B, 1103 Transverse roller A, 1104 Transverse roller B, 1105 Transverse roller C, 1106 Cable guide steel housing. 1401 turnbuckle, 1402 wire rope clip, 1403 dustproof canopy wire rope. Detailed Implementation

[0019] This utility model provides a series-connected trolley-type dustproof canopy device. Its main purpose is to solve the technical bottlenecks existing in dustproof canopy devices during installation and use, such as unclear force transmission at connection nodes, high frictional resistance, large overall mass, low automatic opening and closing efficiency, difficult construction, installation and disassembly, and low reusability. Through innovative design of the support structure system, trolley connection components, and transmission traction system, this device achieves standardized prefabrication of the canopy support system, lightweight assembly of trolley connection nodes, and automated mechanical control and precise positioning of the canopy's opening and closing processes.

[0020] This utility model further aims to provide a fully prefabricated steel structure support system. This system employs a lattice-type double-channel steel column, double-angle steel supporting beams, C-shaped steel beams, pulley blocks, and limiting devices to form a support system adapted to the canopy trolley. Most connections are bolted, allowing for free adjustment and disassembly according to different dimensions and working conditions at the construction site. Through standardized modular combinations, the number of standard sections can be arbitrarily increased or decreased according to the length of the foundation pit or assembly area, enabling the rapid construction of dustproof canopy support structures of different spans.

[0021] This utility model further aims to provide a trolley connection component with low frictional resistance and a clear force transmission path. The component adopts a weight-reduced perforated steel plate body, base screw, traveling roller, cable-fixed horizontal screw, 4-wheel perforated sliding parts, and traction lugs to assemble the trolley component. The prestress and gravity of each section of canopy steel wire, the traction force in the direction of travel, and the impact force in the direction of travel are clearly transmitted to the support system and the transmission traction system through the special structure of the trolley.

[0022] This invention further aims to provide a novel trolley traction system. This system effectively connects the forward guide cable of the lead car, the backward guide cable of the lead car, and the connecting guide cable of the trolleys in three-dimensional space. It utilizes the principle that the lead car drives the rear car forward during traction, the principle of controlling the spacing of each section of the dustproof canopy steel wire using the tension length of the connecting guide cable, and the principle of the lead car pulling back and colliding with the rear car to retract, thus achieving automatic opening and closing of the dustproof canopy. Simultaneously, a traction system driven by a single double-drum winch is designed, innovatively utilizing a 3-horizontal, 2-vertical roller guide cable reversing device to precisely control the release and retraction of the forward and backward traction cables of the lead car, achieving synchronous opening and closing of the canopy and maintaining coordinated control between the trolleys.

[0023] This invention also aims to solve the problem of single-use of existing dust control devices. By adopting standardized production, bolt connection, and modular assembly for all components, each component can be completely recycled and transported to a new construction site for reuse after dismantling, which greatly improves material utilization and reduces environmental pollution and construction costs.

[0024] This invention provides a series-connected trolley-type dustproof canopy device, particularly suitable for construction scenarios requiring dust suppression above long, narrow foundation pits and the ability to be deployed and retracted as needed. The device comprises a support structure system, a track trolley system, a traction drive system, and a dustproof canopy system. Through the rational combination and coordination of these components, the canopy can be quickly erected, the trolleys and canopy assembled, the canopy system traction-driven opening and closing, and the system dismantled and reclaimed.

[0025] The embodiments of this utility model are as follows: The contents and installation method of the device are described in detail: like Figures 1-2 As shown, Figure 1 and Figure 2 The components and installation methods are as follows: Figure 1 A 3D view of the entire series-connected trolley-type dustproof canopy device. Figure 2This is a front elevation view of a single-set guide rail trolley system. The device comprises: a starting column 1 for the assembly section, a starting column 2 for the standard section, a middle column 3 for the standard section, an ending column 4 for the standard section, a track beam 5 bearing longitudinal and transverse loads, a traction trolley 6, a middle trolley 7, a forward steel wire rope for the traction trolley 8, a backward steel wire rope for the pullback trolley 9, a cable guide support column 10, a three-horizontal and two-longitudinal roller cable guide 11, a winch support base 12, a double-roller winch 13, a dustproof canopy steel wire rope unit 14, and a traction steel wire rope for the trolley 15. The starting columns 1 and 2 for the assembly section are installed and fixed parallel to each other on both sides of the assembly area 17. The starting columns 2, 3, and 4 for the standard section are installed and fixed parallel to each other on both sides of the pit area 16. The track beam 5, which bears longitudinal and transverse loads, is fixed to the upper part of the starting column 1 of the assembly section, the starting column 2 of the standard section, the intermediate column 3 of the standard section, and the ending column 4 of the standard section. The traction trolley 6 and the intermediate trolley 7 are embedded in the track beam 5, which bears longitudinal and transverse loads. One end of the traction trolley's forward steel wire rope 8 is connected to the front end of the traction trolley 6, and the other end passes through the three-horizontal and two-longitudinal roller guide cable 11 and is connected to the double-roller winch 13. The traction force of the double-roller winch 13 retracts the forward steel wire rope 8, pulling the traction trolley 6 forward. One end of the pullback trolley's backward steel wire rope 9 is connected to the front end of the traction trolley 6, and the other end passes through the three-horizontal and two-longitudinal roller guide cable 11 and is connected to the double-roller winch 13. The traction force of the double-roller winch 13 retracts the backward steel wire rope 9, pulling the traction trolley 6 backward. The cable guide support columns 10 are installed parallel to and fixed on both sides of the assembly area 17, and are installed in a straight line in front of the starting column 1 of the assembly section. The three-horizontal and two-vertical roller cable guides 11 are fixed to the cable guide support columns 10. The winch support base 12 is installed parallel to and fixed on both sides of the assembly area 17, and is installed in a straight line in front of the cable guide support columns 10. The double-roller winch 13 is fixed to the winch support base 12. The dustproof canopy wire rope unit 14 is fixed to the traction head car 6 and the intermediate pulley 7. The two ends of the sliding car traction wire rope 15 are fixed between the traction head car 6 and the intermediate pulley 7, respectively. When the traction head car 6 moves forward, the sliding car traction wire rope 15 is taut, driving the intermediate pulley 7 forward.

[0026] like Figure 3 As shown, Figure 3 The components and installation methods are as follows: Figure 3This is a 3D enlarged view of the starting column of the assembly section. The starting column 1 of the assembly section consists of a long-limb channel steel column A101, a short-limb channel steel column A102, a transverse diaphragm A103, a transverse diaphragm B104, a transverse diaphragm C105, a transverse diaphragm D106, a pulley A107, a pulley through-type crossbar A108, a double-clamp nut A109, an angle steel transverse diaphragm A110, a double-clamp finished pulley A111, a double-clamp finished pulley B112, an L-shaped steel section A501, an L-shaped steel section B502, and a C-shaped steel section 503. Anti-torsion clamp 510, and a set of high-strength fixing bolts B512; the long-limb channel steel column A101 and the short-limb channel steel column A102 are welded together by diaphragm A103, diaphragm B104, diaphragm C105, diaphragm D106 and angle steel diaphragm A110 to form a lattice support system; the pulley through-bar A108 passes through pulley A107, and its two ends are fixed to the long-limb channel steel column A101 and the short-limb channel steel column A102 with double-clamp nuts A109; diaphragm C105, diaphragm D106, and angle steel diaphragm A110. 106 lower side; the double-clamp finished pulley 111 is welded and fixed to the upper part of the center line of the angle steel diaphragm A110; the double-clamp finished pulley B112 is welded and fixed to the side of the center line of the diaphragm 105; the assembled L-shaped steel A501 is fixed to the top of the short-limb column A102 of the channel steel by four sets of high-strength bolts B512, and the top edge of the assembled L-shaped steel A501 is flush with the top of the short-limb column A102 of the channel steel; the assembled L-shaped steel 502 is fixed to the long-limb column A101 of the channel steel by four sets of high-strength bolts B512, and the top elevation is the same as that of the assembled L-shaped steel A501; the assembled C-shaped steel 503 is fixed to the top of the short-limb column A101 of the channel steel by four sets of high-strength bolts B512, and the top elevation is the same as that of the assembled L-shaped steel A501; A set of high-strength bolts A511 is fixed to the top of the long-limb channel steel column A101, and the top edge of the C-shaped steel section 503 is flush with the top of the long-limb channel steel column A101; one side of the anti-torsion clamp 510 is fixed to the top of the long-limb channel steel column A101 by a set of high-strength bolts C514, and the other side is clamped to the C-shaped steel section 503 by a set of high-strength bolts D515; the forward steel wire rope 8 of the traction head car is limited by pulley A107 and double-clamp finished pulley B112 to facilitate its extension and shortening; the backward steel wire rope 9 of the pullback head car is limited by double-clamp finished pulley A111 to facilitate its extension and shortening.

[0027] like Figure 4 As shown, Figure 4 The components and installation methods are as follows: Figure 4This is a 3D enlarged view of the starting column of the standard section. The starting column 2 of the standard section consists of a long-limb channel steel column B201, a short-limb channel steel column B202, a transverse diaphragm E203, a transverse diaphragm F204, a transverse diaphragm G205, a transverse diaphragm H206, a pulley B211, a pulley through-bar B208, a double-clamp nut B207, an assembly section L-shaped steel A501, an assembly section L-shaped steel B502, a standard section L-shaped steel A504, a standard section L-shaped steel B505, an assembly section C-shaped steel 503, a standard section C-shaped steel 506, an anti-torsion clamp 510, a set of high-strength fixing bolts B512, a limiting steel plate A209, and a limiting high-strength bolt A210; the channel steel... The long-limb column B201 and the short-limb channel steel column B202 are welded together by diaphragms E203, F204, G205, and H206 to form a lattice support system. The pulley-through crossbar B208 passes through pulley B211, and its two ends are fixed to the long-limb channel steel column B201 and the short-limb channel steel column B202 with double-clamp nuts B207, below diaphragms G205 and H206. The assembled L-shaped steel section A501 and the standard L-shaped steel section A504 are respectively fixed to the top of the short-limb channel steel column B202 by two sets of high-strength bolts B512. The top edge of steel A504 is flush with the top of the short-limb channel steel column B202, and the gap between the assembled L-shaped steel section A501 and the standard L-shaped steel section A504 is controlled within 2mm; the assembled L-shaped steel section B502 and the standard L-shaped steel section B505 are respectively fixed to the long-limb channel steel column B201 by two sets of high-strength bolts B512, with their top elevations being the same as those of the assembled L-shaped steel section A501 and the standard L-shaped steel section A504, and the gap between the assembled L-shaped steel section B502 and the standard L-shaped steel section B505 is controlled within 2mm; the assembled C-shaped steel section 503 and the standard C-shaped steel section 506 are fixed to the long-limb channel steel column B201 by a set of high-strength bolts A511. At the top, the top edges of the assembled section C-shaped steel 503 and the standard section C-shaped steel 506 are flush with the top of the long-limb column B201 of the channel steel; one side of the anti-torsion clamp 510 is fixed to the top of the long-limb column B201 of the channel steel by a set of high-strength bolts C514, and the other side is clamped to the assembled section C-shaped steel 503 and the standard section C-shaped steel 506 by a set of high-strength bolts D515 respectively; the forward steel wire rope 8 of the traction head car is limited by the pulley B211 to facilitate its extension and shortening; the limiting steel plate A209 is fixed to the end of the assembled section L-shaped steel A501 and the assembled section L-shaped steel B502 near the starting column 2 of the standard section by limiting high-strength bolts A210 respectively.

[0028] like Figure 5 As shown, Figure 5 The components and installation methods are as follows: Figure 4This is a 3D enlarged view of the intermediate column 3 of the standard section. The intermediate column 3 of the standard section comprises a long-limb channel steel column C301, a short-limb channel steel column C302, a transverse diaphragm I303, a transverse diaphragm J304, a pulley C305, a pulley through-type crossbar C306, a double-clamp nut C307, standard section L-shaped steel A504, standard section L-shaped steel B505, standard section C-shaped steel 506, an anti-torsion clamp 510, and a set of high-strength fixing bolts B512; the long-limb channel steel column C301 and the short-limb channel steel column... The column C302 is welded together with the transverse diaphragms I303 and J304 to form a lattice support system; the pulley through-bar C306 passes through the pulley C305, and its two ends are fixed to the long-limb channel steel column C301 and the short-limb channel steel column C302 with double-clamp nuts C307, on the lower side of the front and rear transverse diaphragms J304; the adjacent two-span standard L-shaped steel sections A504 are respectively fixed to the top of the short-limb channel steel column C302 with two sets of high-strength bolts B512, and the standard L-shaped steel section... The top edge of the A504 section steel is flush with the top of the short-limb channel steel column C302, and the gap between two adjacent standard L-shaped steel sections A504 is controlled within 2mm; the two adjacent standard L-shaped steel sections B505 are respectively fixed to the long-limb channel steel column C301 by two sets of high-strength bolts B512, with the top elevation the same as the standard L-shaped steel section A504, and the gap between the assembled L-shaped steel section B502 and the standard L-shaped steel section B505 is controlled within 2mm; the two adjacent standard C-shaped steel sections 506 are connected by... The high-strength bolt A511 is fixed to the top of the long-limb channel steel column C301, and the top edge of the adjacent two standard sections of C-shaped steel 506 is flush with the top of the long-limb channel steel column C301; the anti-torsion clamp 510 is fixed to the top of the long-limb channel steel column C301 on one side by a set of high-strength bolts C514, and the other side is clamped to the standard section of C-shaped steel 506 by a set of high-strength bolts D515; the forward steel wire rope 8 of the traction head car is limited by the pulley C305 to facilitate its extension and shortening.

[0029] like Figure 6 As shown, Figure 6 The components and installation methods are as follows: Figure 6This is a 3D enlarged view of the end post of the standard section. The end post 4 of the standard section consists of a long-limb channel steel post D401, a short-limb channel steel post D402, a transverse diaphragm K403, a transverse diaphragm L404, a transverse diaphragm M405, a transverse diaphragm N406, a pulley D409, a pulley through-core crossbar D407, a double-clamp nut D408, an angle steel transverse diaphragm B411, a double-clamp finished pulley C410, a double-clamp finished pulley D412, a standard section tail span L-shaped steel A507, a standard section tail span L-shaped steel B508, a standard section tail span C-shaped steel 509, an anti-torsion clamp 510, a set of fixing high-strength bolts B512, a limiting steel plate B413, and a limiting high-strength bolt B414; the channel... The long steel column D401 and the short channel steel column D402 are welded together by diaphragms K403, L404, M405, N406, and angle steel diaphragm B411 to form a lattice support system. The pulley-through crossbar D407 passes through pulley D409, and its two ends are fixed to the long channel steel column D401 and the short channel steel column D402 with double-clamp nuts D408, below diaphragms M405 and N406. The double-clamp finished pulley D412 is welded and fixed to the upper part of the centerline of angle steel diaphragm B411. The double-clamp finished pulley C410 is welded and fixed to the side of the centerline of diaphragm M405. The standard section end span is L-shaped. Steel A507 is fixed to the top of the short-limb channel steel column D402 by four sets of high-strength bolts B512. The top edge of the L-shaped steel A507 at the end of the standard section is flush with the top of the short-limb channel steel column D402. L-shaped steel B508 at the end of the standard section is fixed to the long-limb channel steel column D401 by four sets of high-strength bolts B512, with its top elevation the same as L-shaped steel A507. C-shaped steel 509 at the end of the standard section is fixed to the top of the long-limb channel steel column D401 by four sets of high-strength bolts B512, with its top edge flush with the top of the long-limb channel steel column D401. One side of the anti-torsion clamp 510 is fixed to the channel steel by a set of high-strength bolts C514. The top of the long-limb column D401 is secured on the other side by a set of high-strength bolts D515 to the C-shaped steel 509 at the end of the standard section. The forward steel wire rope 8 of the traction head car is limited by pulleys D409, double-clamp finished pulleys C410 and D412 to facilitate its extension and shortening. The limiting steel plate B413 is fixed to the end of the L-shaped steel A507 and B508 at the end of the standard section near the end column 4 of the standard section by limiting high-strength bolts B414. The limiting steel plate A209 is fixed to the end of the L-shaped steel A501 and B502 at the end of the assembled section near the starting column 2 of the standard section by limiting high-strength bolts A210.

[0030] like Figures 7-8 As shown, Figure 7 and Figure 8 The components and installation methods are as follows: Figure 7 This is an enlarged view of the C-shaped steel torsional reinforcement. Figure 8 This is a drawing of a C-shaped steel torsion reinforcement component. The torsion reinforcement component comprises an anti-torsion clamp 510, a set of high-strength fixing bolts C514, and a set of high-strength fixing bolts D515. One side of the anti-torsion clamp 510 is fixed to the top of the long-limb column of the channel steel using the set of high-strength fixing bolts C514, and the other side is clamped to the end of the C-shaped steel using the set of high-strength fixing bolts D515.

[0031] like Figures 9-10 As shown, Figure 9 and Figure 10 The components and installation methods are as follows: Figure 9 This is a schematic diagram of the trolley limit device. Figure 10 This is a part drawing of the trolley limiting device. The limiting component includes limiting steel plate A209, limiting steel plate B413, a set of fixing limiting high-strength bolts A210, and limiting high-strength bolts B414. The limiting steel plate B413 is fixed to the ends of the standard section's tail span L-shaped steel A507 and the standard section's tail span L-shaped steel B near the end post 4 of the standard section via the limiting high-strength bolts B414. The limiting steel plate A209 is fixed to the ends of the assembled section L-shaped steel A and the assembled section L-shaped steel B502 near the starting post of the standard section via the limiting high-strength bolts A210.

[0032] like Figures 11-12 As shown, Figure 11 and Figure 12 The components and installation methods are as follows: Figure 11 This is a magnified view of the head trochlea. Figure 12The diagram shows the components of the head trolley. The tractor unit comprises a trolley steel plate body 601, a tractor unit circular screw 602, a transverse four-wheel solid support frame A603, trolley wheel axle A604, trolley wheels A605, trolley wheels B606, a threaded short rod A607, a crash barrier A608, a buffer rubber block A609, a front lug 610, a bottom lug 611, and side lugs 612. The trolley steel plate body 601 is a lightweight, perforated body. Its function is to act as a force-transmitting node component to support the dustproof canopy; it has one threaded hole at the top and four wheel axle threaded holes on the front, rear, and sides; the traction head vehicle's circular screw 602 has threads at its middle and end, and the circular screw is manually tightened to pass through the threaded hole on the upper part of the trolley steel plate body 601, thereby fixing the middle part of the traction head vehicle's circular screw 602 to the threaded hole on the upper part of the trolley steel plate body 601, and the end of the traction head vehicle's circular screw 602 is screwed into the transverse four-wheel solid... The body support frame is fixed in the screw hole A603; the pulley wheel axle A604 is a threaded screw shaft in the middle, which is fixed by screwing through the wheel axle thread hole of the pulley steel plate body 601; the pulley wheels A605 and B606 are respectively fixed to the two ends of the pulley wheel axle A604; the assembly method of the other 3 wheels is the same as this method, and after forming, it is a 4-wheel pulley mode; the two threaded round short rods A607 are respectively welded to the pulley steel plate body 601. The front and rear sides have the same elevation; the anti-collision steel block A608 has a threaded hole in the middle and is fixed to the threaded round short rod A607 by screwing; the buffer rubber block A609 is glued to the anti-collision steel block A608; the front lug 610 is welded to the front side of the trolley steel plate body 601; the bottom lug 611 is welded to the rear bottom of the trolley steel plate body 601; the side lug 612 is welded to the rear bottom edge of the trolley steel plate body 601.

[0033] like Figures 13-14 As shown, Figure 13 and Figure 14 The components and installation methods are as follows: Figure 13 This is a magnified view of the middle trolley. Figure 14This is a drawing of the intermediate trolley parts. The intermediate trolley 7 consists of a trolley body 701, an intermediate trolley annular screw 702, a transverse four-wheel solid support frame B703, a trolley wheel axle B704, trolley wheels C705 and D706, a threaded short rod B707, a crash barrier steel block B708, a buffer rubber block B709, a front side lug 710, a rear side lug 711, and a clamping pulley 712. The trolley body 701 is a lightweight, perforated body, and its function is... For the force transmission node component that bears the dustproof canopy; it has one threaded hole at the top and four wheel axle threaded holes on the front, rear, and upper and lower sides; the middle trolley annular screw 702 is threaded at both the middle and the end, and the annular screw is manually screwed through the threaded hole on the upper part of the trolley body 701 to fix the middle part of the middle trolley annular screw 702 to the threaded hole on the upper part of the trolley body 701, and the end of the middle trolley annular screw 702 is screwed into the threaded hole of the transverse four-wheel solid support frame B703. The trolley wheel axle B704 is a threaded screw shaft in the middle, which is fixed by screwing through the wheel axle thread hole of the trolley body 701. The trolley wheels C705 and D706 are fixed to both ends of the trolley wheel axle B704 respectively. The assembly method of the other three wheels is the same as this method, and after forming, it is a 4-wheel trolley mode. The two threaded round short rods B707 are welded to the front and rear sides of the trolley body 701 respectively, with the same elevation. The anti-collision steel block B70 8. A threaded hole is made in the middle and fixed to the threaded short rod B707 by screwing; the buffer rubber block B709 is glued to the anti-collision steel block B708; the front side lug 710 is welded to the front bottom edge of the trolley body 701; the rear side lug 711 is welded to the rear bottom edge of the trolley body 701; the clamping pulley 712 is fixed to the middle bottom of the trolley body 701 by fixing bolts 713 to hold the return head car backward steel wire rope 9.

[0034] like Figure 15 As shown, Figure 15 The components and installation methods are as follows: Figure 15This diagram illustrates the traction wire rope system for the pulleys. The system comprises a traction head car 6, intermediate pulleys 7, a forward traction wire rope 8 for the traction head car, a backward traction wire rope 9 for the pullback head car, and a traction wire rope 15 for the pulleys. The forward traction wire rope 8 for the traction head car is connected to the front lug 610 of the traction head car via a snap-fit ​​connection. A double-roller winch 13 is used to retrieve the forward traction wire rope 8, driving the traction head car 6 forward. The front end of the traction wire rope 15 is connected to the side lug 612 of the traction head car via a snap-fit ​​connection, and the rear end is connected to the front side lug 710 of the intermediate pulley. The driving force of the traction head car's forward movement tightens the traction wire rope 15, driving the pulleys forward. Between two adjacent intermediate pulleys 7, the front end of the traction wire rope 15... The rear side lug 711 of the end and the middle trolley are connected by a snap-fit ​​connection, and the rear side lug 710 of the middle trolley is connected by a snap-fit ​​connection. During the forward movement of the front middle trolley 7, the traction steel wire rope 15 of the trolley is tightened, which drives the rear middle trolley 7 to move forward. The retraction steel wire rope 9 of the pull-back head car is connected by a snap-fit ​​connection to the bottom lug 611 of the traction head car. The double roller winch 13 is used to retrieve the retraction steel wire rope 9 of the pull-back head car, which drives the traction head car 6 to move backward. During the backward movement of the traction head car 6, the buffer rubber block A609 of the traction head car impacts the buffer rubber block B709 of the middle trolley. The buffer rubber block B709 of the middle trolley continues to impact the buffer rubber block B709 of the subsequent middle trolley, which drives the entire trolley system to move backward.

[0035] like Figure 16 As shown, Figure 16 The components and installation methods are as follows: Figure 16 The diagram shows the installation of the trolleys in the assembly section. The traction trolley 6 and the intermediate trolley 7 are manually pushed into the L-shaped steel sections A501 and B502 of the assembly section. The trolley wheels A605 and B606 of the traction trolley and the trolley wheels C705 and D706 of the intermediate trolley are used to smoothly lock them into the L-shaped steel sections A501 and B502 of the assembly section, so that all trolleys can move stably back and forth on the track beam 5, which bears the longitudinal and lateral loads.

[0036] like Figure 17 As shown, Figure 17 The components and installation methods are as follows: Figure 17This diagram illustrates the connection between the pulley and the dustproof canopy wire rope. The connection node comprises a traction headstock circular screw 602, a middle pulley circular screw 702, a turnbuckle 1401, a wire rope clip 1402, and a dustproof canopy wire rope 1403. One end of the turnbuckle 1401 is connected to the circular safety clip of the traction headstock circular screw 602 and the middle pulley circular screw 702 on one side of the pit. The dustproof canopy wire rope 1403 passes through the turnbuckle 1401 and is secured by three wire rope clips 1402 after bending. The dustproof canopy wire rope 1403 passes through the circular rings of the traction headstock circular screw 602 and the middle pulley circular screw 702 on the other side of the pit and is secured by three wire rope clips 1402 after bending.

[0037] like Figures 18-21 As shown, Figures 18-21 The components and installation methods are as follows: Figure 18 This is a front view of a three-horizontal, two-vertical roller guide. Figure 19 This is a rear view of a three-horizontal, two-vertical roller guide. Figure 20 This is a part drawing of a three-horizontal and two-vertical roller cable guide. Figure 21 This is a schematic diagram of a double-roller winch. The terminal components of this traction system include a three-horizontal and two-vertical roller cable guide 11 and a double-roller winch 13. Horizontal rollers A1103, B1104, and C1105, and longitudinal rollers A1101 and B1102 are bolted to the steel housing 1106 of the cable guide. The forward steel wire rope 8 of the traction head car passes through the hole between horizontal rollers A1103 and B1104 and is fixed to one side of the drum of the double-roller winch 13. The backward steel wire rope 9 of the pullback head car passes through the hole between horizontal rollers B1104 and C1105 and is fixed to the other side of the drum of the double-roller winch 13.

[0038] All the components of the dustproof canopy mentioned above constitute a complete system, working together to suppress dust during foundation pit excavation.

[0039] Installation method and principle: Step 1: Layout and Standardized Design of Components of the Equipment 1. Determine the coverage area and height of the dustproof awning based on the length and width dimensions of the construction pit. Preliminarily determine the positions of the starting columns for the assembly section, the starting columns for the standard section, the intermediate columns for the standard section, and the columns for the standard section, as well as the spacing between the standard section columns and the spacing of the dustproof awning steel wire ropes.

[0040] 2. Based on the plan layout, perform stress calculations on the wire rope, support system, and connection nodes to determine the material specifications and models of the steel structure components required for the support system, the material specifications and models of the trolley steel structure components, the length and specifications of the traction wire rope, and the power model of the double roller winch.

[0041] Step 2: Pre-fabrication and assembly of materials: Based on the floor plan and the design drawings of the steel structure components of the installation, the components are prefabricated in the steel structure manufacturing plant. The specific processing content is as follows: 1. Based on the detailed design dimensions, produce, weld, and assemble the long-limb channel steel columns, short-limb channel steel columns, horizontal diaphragms, pulleys, pulley through-bars, double-clamp nuts, etc., into standardized semi-finished columns.

[0042] 2. Based on the standard spacing and quantity of each span of the columns, prefabricate track beams of standardized lengths, such as L-shaped steel and C-shaped steel. Based on the number of node connections, prefabricate standardized anti-torsion clamps, sets of high-strength fixing bolts, limiting steel plates, and limiting high-strength bolts.

[0043] 3. Based on the size and quantity of the pulley components, prefabricate standardized pulley components for on-site assembly.

[0044] 4. Produce the forward traction wire rope for the traction head car based on the distance from the winch to the assembly starting column + 2 times the track beam length + 3 meters of reserved reserve length. Produce the reverse traction wire rope for the pullback head car based on the distance from the winch to the assembly starting column + the track beam length + 1.5 meters of reserved reserve length. Based on the spacing of the dustproof canopy wire ropes, deduct the pulley length, and produce standardized length traction wire ropes for each section of the pulley.

[0045] Step 3: First layout and positioning, followed by installation of embedded parts: Using existing coordinate points, the center point of each dustproof canopy column was precisely located using a total station and marked with positioning stakes. Based on the marked positioning points, the embedded parts for the columns were then installed.

[0046] Step 4: Second layout and positioning: Using existing coordinate points, the center point of each dustproof canopy column was precisely measured again using a total station and marked with a marker. Based on each marked point, the outer contour line of the bottom lattice column was laid out for positioning.

[0047] Step 5: Preparations before installation: Check the dimensional accuracy of all assembled components, ensure component perpendicularity and surface flatness, verify the accuracy of pre-drilled bolt hole positioning, and guarantee that component quality meets requirements. Step 6: Installation of the support system: 1. Place the prefabricated semi-finished columns (starting column 1 of the assembly section, starting column 2 of the standard section, intermediate column 3 of the standard section, and ending column 4 of the standard section) at the corresponding outer contour positioning positions, correct the direction, and then weld them to the embedded parts.

[0048] 2. The L-shaped steel sections A 501, B 502, A 504, B 505, A 507, and B 508 of the standard L-shaped steel section are fixed to the long-limb column A 101, short-limb column A 102, A 201, B 202, C 301, C 302, D 401, and D 402 of the channel steel using a set of high-strength bolts B 512. The top elevations of the L-shaped steel sections of the track beams are the same, and the gaps between adjacent L-shaped steel sections of the track beams are controlled within 2mm. The C-shaped steel 503 of the assembly section, the C-shaped steel 506 of the standard section, and the C-shaped steel 509 of the tail span of the standard section are fixed to the top of the long-limb channel steel columns A101, B201, C301, and D401 using a set of high-strength bolts A511. The C-shaped steel of the track beam is flush with the top of the long-limb channel steel columns. The L-shaped steel A501 and B502 of the first span of the assembly section extend 150mm beyond the starting column of the assembly section. The L-shaped steel A507 and B508 of the tail span of the standard section extend 150mm beyond the end column of the standard section. The track beam and columns form a complete beam-column support system.

[0049] 3. After installation, use a level or laser level to check the verticality of the column and the levelness of the track. If necessary, make fine adjustments by tapping the bolts.

[0050] 4. Secure one side of the anti-torsion clamp 510 to the top of the long-limb channel steel columns A101, B201, C301, and D401 using a set of high-strength bolts C514. Secure the other side to the C-shaped steel 503 in the assembly section, C-shaped steel 506 in the standard section, and C-shaped steel 509 in the final span of the standard section using a set of high-strength bolts D, thereby enhancing the torsional and tensile resistance of the C-shaped steel track. The C-shaped steel 503 in the first span of the assembly section extends 150mm beyond the starting column of the assembly section. The C-shaped steel 509 in the final span of the standard section extends 150mm beyond the ending column of the standard section.

[0051] 5. Fix the limiting steel plate B413 at the end of the standard section to the end of the L-shaped steel A507 and L-shaped steel B508 at the end of the standard section near the end column 4 of the standard section using limiting high-strength bolts B414.

[0052] Step 7: Assembly of the trolley dustproof awning system: 1. Connect the fixing buckle of the empty drum on the side of the double roller winch 131 on both sides of the foundation pit to the retraction steel wire rope 9 of the pull-back head car, and pre-rotate the drum in the opposite direction to tightly wrap the retraction steel wire rope 9 of the pull-back head car, which is produced according to the design length, around the surface of the drum.

[0053] 2. Assemble all components of the traction vehicle 6 on both sides of the pit. Manually push the traction vehicle 6 into the L-shaped steel sections A 501, B 502, and C 503 of the assembly section. Use the pulley wheels A605 and B 606 of the traction vehicle to smoothly lock it into the L-shaped steel sections A 501 and B 502 of the assembly section.

[0054] 3. Rotate the rollers on both sides of the pit in the forward direction to release the length of the pullback head car's backward steel wire rope 9, so that it just passes through the hole between the horizontal shaft rollers 1104 and 1105, passes through the double-clamp finished pulley A 111 on the starting column 1 of the assembly section, and is fixed to the bottom lug 611 of the traction head car with the end buckle. At this time, the pullback head car's backward steel wire rope 9 is kept in a slightly taut state.

[0055] 4. First, connect the forward steel wire rope 8 of the traction vehicle to the front lug 610 of the traction vehicle on both sides of the pit using a snap-fit ​​connection. Then, manually pull the forward steel wire rope 8 of the traction vehicle through the double-clamped finished pulleys D412, C410, and D409 on the end column 4 of the standard section, the pulley C305 on the middle column 3 of the standard section, the pulley B211 on the starting column 2 of the standard section, the pulley A107 on the starting column 1 of the assembly section, and the double-clamped finished pulley B112. Pass it through the hole between the horizontal rollers 1103 and 1104, and finally wrap it around and fix it to the empty drum fixing buckle on one side of the double roller winch 13. At this time, the forward steel wire rope 8 of the traction vehicle is kept in a slightly taut state.

[0056] 5. On both sides of the foundation pit, except for the clamping pulley 712, assemble all other components of the intermediate trolley 7. Manually push the traction head car 7 into the assembly sections L-shaped steel A 501, L-shaped steel B 502, and C-shaped steel 503. Use the traction head car's trolley wheels A605 and B606 to smoothly lock them into the assembly sections L-shaped steel A 501 and B 502. Then, use bolts 713 to secure the pullback head car's retraction wire rope 9 to the bottom center of the trolley's steel plate body 701.

[0057] 6. On both sides of the pit, connect the front end of the sliding block traction steel wire rope 15 to the side lug 612 of the traction vehicle with a snap-fit ​​connection, and connect the rear end to the front side lug 710 of the middle sliding block with a snap-fit ​​connection, keeping the sliding block traction steel wire rope 15 in a downward state. Use the driving force of the traction vehicle to tighten the sliding block traction steel wire rope 15, driving the following vehicle forward.

[0058] 7. On one side of the pit, connect one end of the turnbuckle 1401 to the safety buckle of the traction head's circular screw 602. Then, pass the dustproof canopy steel wire rope 1403 through the turnbuckle 1401, bend it, and secure it with three steel wire rope clips 1402. On the other side of the pit, pass the dustproof canopy steel wire rope 1403 through the circular screws of the traction head's circular screw 602 and the intermediate pulley's circular screw 702 on the other side of the pit, bend it, and secure it with three steel wire rope clips 1402. Pre-rotate the turnbuckle to pre-stress the dustproof canopy steel wire rope 1403.

[0059] 8. Using the same method as in step 6, install the 1403 steel wire rope for the dustproof canopy on the middle trolley.

[0060] 9. On both sides of the foundation pit, the double roller winch 13 is started synchronously and rotated in the forward direction, so that the steel wire rope 8 of the traction vehicle moves forward and drives the traction vehicle 6 forward.

[0061] 10. After advancing a certain distance of the dustproof canopy steel wire rope spacing, repeat steps 5 to 9.

[0062] 11. After installing all intermediate pulleys and dustproof canopy cables on both sides of the foundation pit, fix the limiting steel plate 209 at the starting point column of the standard section to the starting point column of the L-shaped steel A 501 and L-shaped steel B 502 of the assembly section respectively using limiting high-strength bolts 210. Limiting steel plates are installed at the front and rear of the entire foundation pit section to restrict the forward and backward movement of the trolley.

[0063] Step 8: Automatic control of the opening and closing of the dustproof canopy device: 1. The synchronous drive double roller winches 13 on both sides of the pit rotate in opposite directions, retrieving the retracting steel wire rope 9 of the pull-back head car, which in turn drives the traction head car 6 to retreat. During the retreat, the buffer rubber block A 609 of the traction head car impacts the buffer rubber block B 709 of the intermediate trolley, and the buffer rubber block 709 of the intermediate trolley continues to impact the buffer rubber block B 709 of the subsequent intermediate trolley, driving the entire trolley system to retreat, thereby retracting the dustproof canopy.

[0064] 2. The synchronous drive winches 13 on both sides of the pit rotate forward, retrieving the traction cable 8 of the lead tractor and driving the lead tractor 6 forward. Using the driving force of the lead tractor, the traction cable 15 of the sliding block is tightened, driving the rear tractor forward. Between two adjacent intermediate tractors 7, the front end of the sliding block traction cable 15 is connected to the rear side lug 711 of the intermediate tractor using a snap-fit ​​connection, and the rear end is connected to the rear side lug 710 of the intermediate tractor using a snap-fit ​​connection. During the forward movement of the front intermediate tractor 7, the traction cable 15 of the sliding block is tightened, driving the rear intermediate tractor 7 forward. The dustproof canopy is then opened.

[0065] 3. Repeat steps 1 and 2 to achieve the effect of automatic opening and closing of the dustproof canopy.

[0066] Step 9: Disassembly and recycling of the dustproof canopy device: 1. Remove the high-strength limiting bolts A210 on both sides of the foundation pit and the limiting steel plate A209 at the starting point column of the standard section.

[0067] 2. The double roller winches 13 on both sides of the synchronous drive pit rotate in opposite directions, and one by one they knock the dustproof canopy trolleys 7 back to the assembly section.

[0068] 3. By back-tightening the turnbuckle 1401 of the dustproof canopy steel wire rope, the prestress of the dustproof canopy steel wire rope 1403 is removed, and the dustproof canopy is dismantled. The intermediate pulley clamp pulley 712, fixing bolt 713, and traction steel wire rope 15 of the pulley are removed, and the intermediate pulley 7 is taken out.

[0069] 4. Repeat steps 2 and 3 to remove all the middle pulleys 7.

[0070] 5. Remove the forward steel cable 8 of the tractor and the backward steel cable 9 of the pullback tractor, and take out the tractor 6.

[0071] 6. Recycle all pulleys and traction wire ropes.

[0072] 7. Loosen the fixing bolts and recycle all track beam steel structures and semi-finished column steel structures.

[0073] The working principle of this device is explained below: 1. This utility model provides a clear force transmission path and principle, enabling the vertical gravity of the dustproof canopy to be transmitted through the circular screw to the steel plate of the trolley body, then to the upper two of the four wheels at the bottom of the trolley, and finally to the L-shaped steel of the track beam. The lower two wheels support the L-shaped steel of the track beam in opposite directions, ensuring that the trolley does not rotate or tip over. The horizontal force of the steel wire rope of the dustproof canopy is transmitted through the circular screw at the top of the trolley to the C-shaped steel of the track beam, and then from the C-shaped steel to the lattice-type columns. The entire force transmission path is clear, the division of labor among components is clear, and the theoretical force calculation is simple and clear, significantly improving the safety and reliability of the components under stress. All force transmission points adopt wheel-type point contact, resulting in low friction and low structural traction energy consumption.

[0074] 2. This utility model provides a fully prefabricated steel structure support system adapted to tandem pulleys. The system consists of lattice-type double-channel steel columns, double-angle steel support beams, C-shaped steel beams, pulley blocks, and limiting devices, adapting to the support requirements of canopy pulleys. Most connections are bolted, allowing for flexible adjustment and disassembly according to different dimensions and working conditions at the construction site. Through standardized modular combinations, the number of standard sections can be arbitrarily increased or decreased according to the length of the foundation pit or assembly area, enabling rapid construction of dustproof canopy support structures of different spans.

[0075] 3. This utility model proposes a novel pulley traction system principle. This system effectively connects the forward guide cable of the lead car, the backward guide cable of the lead car, and the pulley connecting guide cable in three-dimensional space. Utilizing the principle that the lead car drives the rear car forward during traction, the spacing of each section of the dustproof canopy steel wire is controlled by the tension length of the pulley connecting guide cable. Furthermore, the automatic opening and closing of the dustproof canopy is achieved by utilizing the principle that the lead car's pullback collides with the rear car's retraction. Simultaneously, a traction system driven by a single double-drum winch is designed, innovatively employing a 3-horizontal, 2-vertical roller guide cable reversing device to precisely control the release and retraction of the lead car's forward and backward traction cables, achieving synchronous opening and closing of the canopy and ensuring coordinated control between the pulleys.

[0076] 4. This utility model also aims to solve the problem of single-use of existing dustproof devices; through standardized production, bolt connection and modular assembly of all components, each component can be completely recycled and transported to a new construction site for reuse after dismantling, which greatly improves material utilization and reduces environmental pollution and construction costs.

[0077] Based on the above working principle, this utility model not only achieves a reasonable distribution of structural forces in terms of mechanics, but also fully considers the frictional and inertial characteristics between the components in terms of dynamics, making the operation of the entire system more stable and safe.

[0078] Compared with the prior art, the present invention has the following advantages and technical effects: Compared with existing technologies, this invention has significant advantages in terms of performance improvement and cost reduction. These advantages are achieved through innovative design and key technical solutions, mainly reflected in the following aspects.

[0079] 1. Improved safety performance Traditional dustproof canopies have complex connection nodes, unclear force transmission paths, and poor overall stability. U-shaped wheel slot connections, as a semi-rigid connection method, transfer the weight of the canopy and the horizontal tension of the steel wires to the I-beam flanges through the U-shaped wheel slots. This causes out-of-plane tension and torque on the I-beam flanges, leading to buckling instability and increasing the risk of pull-out of the U-shaped wheel slots, seriously affecting construction safety.

[0080] This invention provides a novel force transmission node system for a trolley. This system transmits the vertical gravity of the dustproof canopy to the trolley's steel body plate via a circular screw, then to the upper two wheels at the bottom of the trolley, and finally to the L-shaped steel of the track beam. Simultaneously, the lower two wheels counter-rotate back against the L-shaped steel of the track beam, ensuring the trolley does not rotate or tip over. The horizontal force of the dustproof canopy's wire rope is transmitted to the C-shaped steel of the track beam via a circular screw on the upper part of the trolley, and then from the C-shaped steel to the lattice-type columns. The entire force transmission path is clear, the functions of each component are well-defined, and the theoretical force calculation is simple and straightforward, significantly improving the safety and reliability of the components under stress.

[0081] This invention also provides a fully prefabricated steel structure support system, which consists of lattice-type double-channel steel columns, double-angle steel support beams, C-shaped steel beams, pulley blocks, and limiting devices, adapting to the support requirements of canopy trolleys. Most connections are bolted, allowing for flexible adjustment and disassembly according to different dimensions and working conditions at the construction site. This system is lightweight, has a clear force transmission path, and exhibits high structural reliability and correction capabilities.

[0082] Because the canopy can open and close automatically, the frequency of manual operation is reduced, effectively lowering the risk of falls. The three-axis cable guide and limiter ensure the safe operation of the traction steel strand, avoiding injuries caused by steel strand breakage or entanglement.

[0083] 2. Short construction and installation time The welding process for the steel structures supporting the sides of traditional dustproof canopies is complex, and the U-shaped wheel slots are bulky, making construction, installation, and disassembly difficult, resulting in low assembly efficiency and a long construction period.

[0084] This utility model adopts a prefabricated assembly standardized component production and installation mode. The supporting columns use factory-prefabricated semi-finished lattice columns, and the tracks use double L-shaped steel and C-shaped channel steel. All components are prefabricated and standardized in the factory, and on-site assembly is largely done with bolts, making the installation and disassembly process quick and convenient, and the installation process simple. The trolley adopts an assembly insertion design, is lightweight, and its installation and disassembly are equally convenient and efficient.

[0085] 3. High efficiency Traditional dustproof canopy devices suffer from high frictional resistance at connection nodes, leading to difficulties in traction and sliding, and low work efficiency. U-shaped wheel slots are horizontally set up with pulleys and secured to the flanges of the I-beams. However, due to the significant weight of the U-shaped wheel slots, they are prone to sagging, causing solid surface friction between the U-shaped steel and the I-beam flanges, greatly increasing frictional resistance and making traction difficult. Furthermore, the contact area between the U-shaped steel and the I-beams experiences severe wear. In addition, the traction method is not along the path direction but at an angle, which inevitably further increases wheel resistance.

[0086] This utility model uses a horizontal track beam in conjunction with a bearing-type roller trolley in the direction of force, which significantly reduces rolling friction resistance; the trolley structure has high rigidity and clear force distribution, and is not prone to surface friction due to torsion; the traction steel strand is separated from the pulley through the cable guide, the force path is clear, and torque interference caused by steel strand crossing is effectively avoided, thereby greatly improving the system operating efficiency.

[0087] 4. High degree of automation Traditional dustproof canopies typically rely on manual dragging or simple winches for one-way traction. This invention, however, successfully achieves fully automated control of the canopy's deployment and retraction by introducing a traction system comprised of a double-drum winch, a three-axis roller cable guide, and limit switches. This system can precisely stop or start at any position, significantly improving operational accuracy and safety.

[0088] 5. Highly adaptable By increasing or decreasing the number of standard section columns and adjusting the length of the steel cables, the length and width of the canopy can be flexibly adjusted, making it suitable for foundation pits and assembly areas of different sizes; the three-axis cable guide allows the steel strands to wind through complex paths to meet the needs of different site layouts; both the trolleys and tracks adopt a modular design to adapt to the layout of tracks of different lengths.

[0089] 6. Easy to operate The installation process is simple and straightforward, requiring no complicated welding or high-altitude operations. Ordinary operators can master the skills after a short training period. During the operation of the canopy, the canopy can be easily unfolded and retracted simply by starting or stopping the winch via the control panel. The operation is intuitive and convenient.

[0090] 7. Cost reduction 1. Simple structure and low manufacturing cost. The complete set of equipment mainly consists of standard steel profiles, bolts, pulleys, winches, etc. The materials are easy to obtain, the processing is simple, and the manufacturing cost is far lower than that of similar equipment that uses complex sensors and electrical control systems.

[0091] 2. Low maintenance cost. All components adopt a modular design, and can be replaced individually when wear or damage occurs; the winch and pulley adopt a mature mechanical transmission structure, which is convenient to maintain and has a long service life.

[0092] 3. High reusability. Except for the anchoring of the column base, all components are connected by bolts. After dismantling, they can be directly used in the next project, which greatly reduces project costs and material consumption.

[0093] 8. Advanced technical solution 1. Series Pulley Traction Technology: This technology connects the lead car and intermediate pulleys in series using steel strands. A winch pulls the lead car, which in turn drives the following cars forward. By connecting the pulleys with guide wires, the spacing of each section of the dustproof canopy's steel wires is precisely controlled. The automatic opening and closing of the dustproof canopy is achieved through a mechanism where the lead car pulls back and collidees with the following car to make it retract.

[0094] 2. Triaxial roller guide cable technology: This technology can separate the traction steel strand and the recovery steel strand from the same plane to any space, guide the steel strand to run along different paths, effectively reduce the friction and entanglement between the steel strands, and ensure that the traction force acts directly on the pulley system, thereby significantly improving the stability of the system operation.

[0095] 3. Fully Prefabricated Component Technology: Modular components such as columns, tracks, and trolleys, connected by bolts, enable rapid assembly and disassembly, ensuring installation accuracy and laying the foundation for component reuse. This technology fully embodies the green construction concept of building machinery and equipment.

[0096] 4. Socioeconomic value: This device has broad application potential and is suitable for various scenarios such as road construction, bridge construction, and large-scale factory renovation. It has a broad market prospect and can drive the coordinated development of related supporting industries.

[0097] In summary, this utility model, through its simple yet ingenious structural design and innovative application of key technologies, significantly improves the functionality and adaptability of the dustproof awning device, effectively reduces costs, and fully meets the diverse needs of modern building construction.

[0098] Promotion, application and development prospects: This utility model's tandem pulley-type dustproof canopy device is not only suitable for foundation pit construction and prefabricated buildings, but can also be widely used in many large-scale work sites requiring temporary shelter, such as bridge construction, railway construction, port operations, and coal storage and transportation. The device adopts a modular design, allowing for flexible combinations according to the length, width, and height requirements of different projects. Combined with pulleys and steel strands of different load-bearing ratings, it meets diverse needs ranging from light-duty shelter to heavy-duty coverage.

[0099] As the construction industry increasingly demands green construction and environmental protection, reusable dustproof awning devices will become increasingly popular with construction companies. In the future, this invention is expected to be deeply integrated with Internet of Things (IoT) technology, enabling real-time monitoring of the awning's operational status, stress state, and environmental data by installing sensors on the pulleys and winches. This data will then be uploaded to a cloud platform, providing construction managers with a scientific basis for decision-making.

Claims

1. A series-connected trolley-type dustproof canopy device, characterized in that; The device consists of an assembly section starting column (1), a standard section starting column (2), a standard section intermediate column (3), a standard section ending column (4), a track beam (5) bearing longitudinal and transverse loads, a traction trolley (6), an intermediate pulley (7), a traction trolley forward wire rope (8), a pullback trolley backward wire rope (9), a cable guide support column (10), a three-horizontal and two-longitudinal roller cable guide (11), a winch support base (12), a double-roller winch (13), a dustproof canopy wire rope unit (14), and a pulley traction wire rope (15). The assembly section starting column (1) and the standard section starting column (2) are installed in parallel. The standard section starting column (2), standard section intermediate column (3), and standard section ending column (4) are fixed on both sides of the pit area (16) in parallel. The track beam (5) bearing the longitudinal and transverse loads is fixed on the upper part of the standard section starting column (1), standard section starting column (2), standard section intermediate column (3), and standard section ending column (4). The traction trolley (6) and intermediate trolley (7) are embedded in the track beam (5) bearing the longitudinal and transverse loads. One end of the traction trolley's forward steel wire rope (8) is connected to the front end of the traction trolley (6), and the other end passes through the three horizontal and two vertical roller guide cable (11). Connected to the double roller winch (13); the steel wire rope (8) for the forward movement of the tractor is retracted by the traction force of the double roller winch (13), pulling the tractor (6) forward; one end of the retracting steel wire rope (9) of the tractor is connected to the front end of the tractor (6), and the other end passes through the three horizontal and two vertical roller guides (11) and is connected to the double roller winch (13); the retracting steel wire rope (9) of the tractor is retracted by the traction force of the double roller winch (13), pulling the tractor (6) backward; the guide support column (10) is installed parallel to both sides of the assembly area (17), and is installed on a straight line in front of the starting column (1) of the assembly section; the three horizontal and two vertical roller guides (11) are connected to the double roller winch (13) for the forward movement of the tractor (6 ... The longitudinal roller guide (11) is fixed on the guide support column (10); the winch support base (12) is installed parallel to both sides of the assembly area (17) and installed on a straight line in front of the guide support column (10); the double roller winch (13) is fixed on the winch support base (12); the dustproof canopy wire rope unit (14) is fixed on the traction head car (6) and the intermediate pulley (7); the two ends of the sliding car traction wire rope (15) are fixed between the traction head car (6) and the intermediate pulley (7) respectively. When the traction head car (6) moves forward, the sliding car traction wire rope (15) is straightened, which drives the intermediate pulley (7) forward.

2. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The components of the starting column (1) of the assembly section include a long-limb channel steel column A (101), a short-limb channel steel column A (102), a transverse diaphragm A (103), a transverse diaphragm B (104), a transverse diaphragm C (105), a transverse diaphragm D (106), a pulley A (107), a pulley through-bar A (108), a double-clamp nut A (109), an angle steel transverse diaphragm A (110), a double-clamp finished pulley A (111), a double-clamp finished pulley B (112), an assembly section L-shaped steel A (501), an assembly section L-shaped steel B (502), an assembly section C-shaped steel (503), an anti-torsion clamp (510), and a set of high-strength fixing bolts B (512); The long-limb channel steel column A (101) and the short-limb channel steel column A (102) are welded together by diaphragms A (103), B (104), C (105), D (106) and angle steel diaphragm A (110) to form a lattice support system; the pulley through-bar A (108) passes through pulley A (107), and its two ends are fixed to the long-limb channel steel column A (101) and the short-limb channel steel column A (102) with double-clamp nuts A (109) on the underside of diaphragms C (105) and D (106); the double-clamp finished pulley A (111) is welded and fixed to the centerline of angle steel diaphragm A (110). The double-clamp finished pulley B (112) is welded and fixed to the side of the center line of the transverse partition C (105); the L-shaped steel A (501) of the assembly section is fixed to the top of the short-limb column A (102) of the channel steel by four sets of high-strength bolts B (512), and the top edge of the L-shaped steel A (501) of the assembly section is flush with the top of the short-limb column A (102) of the channel steel; the L-shaped steel B (502) of the assembly section is fixed to the long-limb column A (101) of the channel steel by four sets of high-strength bolts B (512), and the top elevation is the same as that of the L-shaped steel A (501); the C-shaped steel (503) of the assembly section is fixed to the long-limb column A (101) of the channel steel by a set of high-strength bolts A (511). The top edge of the C-shaped steel section (503) of the limb column A (101) is flush with the top of the long limb column A (101) of the channel steel; the anti-torsion clamp (510) is fixed on the top of the long limb column A (101) of the channel steel by a set of high-strength bolts C (514) on one side, and clamped on the C-shaped steel section (503) by a set of high-strength bolts D (515) on the other side; the forward steel wire rope (8) of the traction head car is limited by pulley A (107) and double-clamp finished pulley B (112) to facilitate its extension and shortening; the backward steel wire rope (9) of the pullback head car is limited by double-clamp finished pulley A (111) to facilitate its extension and shortening.

3. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The standard section starting column (2) consists of a channel steel long-limb column B (201), a channel steel short-limb column B (202), a horizontal diaphragm E (203), a horizontal diaphragm F (204), a horizontal diaphragm G (205), a horizontal diaphragm H (206), a pulley B (211), a pulley through-bar B (208), a double-clamp nut B (207), an assembly section L-shaped steel A (501), an assembly section L-shaped steel B (502), a standard section L-shaped steel A (504), a standard section L-shaped steel B (505), an assembly section C-shaped steel (503), a standard section C-shaped steel (506), an anti-torsion clamp (510), a set of fixing high-strength bolts B (512), a limiting steel plate A (209), and a limiting high-strength bolt A (210); the channel steel long-limb column B (201) and the short-limb column B (202) of the channel steel are welded together by diaphragm E (203), diaphragm F (204), diaphragm G (205) and diaphragm H (206) to form a lattice support system; the pulley through-core crossbar B (208) passes through pulley B (211), and its two ends are fixed to the long-limb column B (201) and the short-limb column B (202) of the channel steel with double clamp nuts B (207), and to the lower side of diaphragm G (205) and diaphragm H (206); the assembled section L-shaped steel A (501) and the standard section L-shaped steel A (504) are respectively fixed to the top of the short-limb column B (202) of the channel steel with two sets of high-strength bolts B (512), and the assembled section L-shaped steel A (501) and the standard section L-shaped steel The top edge of section A (504) is flush with the top of the short-limb channel steel column B (202). The gap between the assembled L-shaped steel section A (501) and the standard L-shaped steel section A (504) is controlled within 2mm. The assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) are respectively fixed to the long-limb channel steel column B (201) by two sets of high-strength bolts B (512). The top elevation is the same as that of the assembled L-shaped steel section A (501) and the standard L-shaped steel section A (504). The gap between the assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) is controlled within 2mm. The assembled C-shaped steel section C (503) and the standard C-shaped steel section C (506) are fixed to the top of the long-limb channel steel column B (201) by a set of high-strength bolts A (511). The top edges of the C-shaped steel (503) of the assembly section and the C-shaped steel (506) of the standard section are flush with the top of the long-limb column B (201) of the channel steel; the anti-torsion clamp (510) is fixed on one side to the top of the long-limb column B (201) of the channel steel by a set of high-strength bolts C (514), and on the other side by a set of high-strength bolts D (515) respectively. The forward steel wire rope (8) of the traction head car is limited by the pulley B (211) to facilitate its extension and shortening; the limiting steel plate A (209) is fixed to the end of the L-shaped steel A (501) of the assembly section and the L-shaped steel B (502) of the assembly section near the starting column (2) of the standard section by the limiting high-strength bolts A (210 respectively.

4. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The standard section intermediate column (3) consists of a channel steel long-limb column C (301), a channel steel short-limb column C (302), a transverse diaphragm I (303), a transverse diaphragm J (304), a pulley C (305), a pulley through-bar C (306), a double-clamp nut C (307), a standard section L-shaped steel A (504), a standard section L-shaped steel B (505), a standard section C-shaped steel (506), an anti-torsion clamp (510), and a set of high-strength fixing bolts B (512); the channel steel long-limb column C (301) and the channel steel short-limb column C (302) are also included. 02) A lattice support system is formed by welding diaphragm I (303) and diaphragm J (304) together; the pulley through-bar C (306) passes through pulley C (305), and its two ends are fixed to the long-limb column C (301) and short-limb column C (302) of the channel steel with double-clamp nuts C (307), and the lower side of the front and rear diaphragms J (304); the standard section L-shaped steel A (504) of the two adjacent spans is fixed to the top of the short-limb column C (302) of the channel steel with two sets of high-strength bolts B (512), and the standard section L-shaped steel The top edge of A (504) is flush with the top of the short-limb column C (302) of the channel steel, and the gap between the two adjacent standard L-shaped steel sections A (504) is controlled within 2mm; the two adjacent standard L-shaped steel sections B (505) are fixed to the long-limb column C (301) of the channel steel by two sets of high-strength bolts B (512), with the top elevation the same as the standard L-shaped steel section A (504), and the gap between the assembled L-shaped steel section B (502) and the standard L-shaped steel section B (505) is controlled within 2mm; the two adjacent standard C-shaped steel sections C (506) are fixed by a set of high-strength bolts B (512). The high-strength bolt A (511) is fixed to the top of the long-limb column C (301) of the channel steel, and the top edge of the adjacent two standard sections of C-shaped steel (506) is flush with the top of the long-limb column C (301) of the channel steel; the anti-torsion clamp (510) is fixed to the top of the long-limb column C (301) of the channel steel on one side by a set of high-strength bolts C (514), and the other side is clamped on the standard section of C-shaped steel (506) by a set of high-strength bolts D (515); the forward wire rope (8) of the traction head car is limited by the pulley C (305) to facilitate its extension and shortening.

5. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The standard section end column (4) consists of a long-limb channel steel column D (401), a short-limb channel steel column D (402), a transverse diaphragm K (403), a transverse diaphragm L (404), a transverse diaphragm M (405), a transverse diaphragm N (406), a pulley D (409), a pulley through-bar D (407), a double-clamp nut D (408), an angle steel transverse diaphragm B (411), a double-clamp finished pulley C (410), and a double-clamp finished pulley. Wheel D (412), standard section tail span L-shaped steel A (507), standard section tail span L-shaped steel B (508), standard section tail span C-shaped steel (509), anti-torsion clamp (510), complete set of fixing high-strength bolts B (512), limiting steel plate B (413), limiting high-strength bolt B (414); the channel steel long limb column D (401) and channel steel short limb column D (402) are connected by transverse diaphragm K (403) and transverse diaphragm L (407) 4) The transverse diaphragm M (405), transverse diaphragm N (406), and angle steel transverse diaphragm B (411) are welded together to form a lattice support system; the pulley through-bar D (407) passes through the pulley D (409), and its two ends are fixed to the long-limb channel steel column D (401) and the short-limb channel steel column D (402) with double-clamp nuts D (408), on the lower side of the transverse diaphragm M (405) and transverse diaphragm N (406); the double-clamp finished product The pulley D (412) is welded and fixed to the upper part of the center line of the angle steel diaphragm B (411); the double-clamp finished pulley C (410) is welded and fixed to the side of the center line of the diaphragm M (405); the standard section tail span L-shaped steel A (507) is fixed to the top of the channel steel short limb column D (402) by 4 sets of high-strength bolts B (512), and the top edge of the standard section tail span L-shaped steel A (507) is flush with the top of the channel steel short limb column D (402); The L-shaped steel B (508) at the end of the standard section is fixed to the long-limb column D (401) of the channel steel by four sets of high-strength bolts B (512), with its top elevation the same as that of the L-shaped steel A (507) at the end of the standard section; the C-shaped steel (509) at the end of the standard section is fixed to the top of the long-limb column D (401) of the channel steel by four sets of high-strength bolts B (512), with the top edge of the C-shaped steel (509) at the end of the standard section flush with the top of the long-limb column D (401); one side of the anti-torsion clamp (510) is fixed to the top of the long-limb column D (401) of the channel steel by four sets of high-strength bolts C (514), and the other side is clamped to the end of the standard section by four sets of high-strength bolts D (515). The traction head car forward wire rope (8) is limited by pulley D (409), double-clamp finished pulley C (410), and double-clamp finished pulley D (412) to facilitate its extension and shortening; the limiting steel plate B (413) is fixed to the end of the standard section end span L-shaped steel A (507) and standard section end span L-shaped steel B (508) near the end column (4) of the standard section by limiting high-strength bolt B (414); the limiting steel plate A (209) is fixed to the end of the assembly section L-shaped steel A (501) and assembly section L-shaped steel B (502) near the beginning column (2) of the standard section by limiting high-strength bolt A (210).

6. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The tractor unit comprises a trolley steel plate body (601), a tractor unit circular screw (602), a transverse four-wheel solid support frame A (603), a trolley wheel axle A (604), a trolley wheel A (605), a trolley wheel B (606), a threaded short rod A (607), a crash barrier A (608), a buffer rubber block A (609), a front lug (610), a bottom lug (611), and a side lug (612). The trolley steel plate body (601) is a lightweight body with openings, serving as a force transmission node component to support the dustproof canopy. It has one threaded hole on its top and four wheels arranged vertically and vertically on its front and rear sides. The traction head car's circular screw (602) is threaded at both the middle and end. The circular screw is manually screwed through the upper threaded hole of the trolley steel plate body (601). The middle part of the traction head car's circular screw (602) is fixed to the upper threaded hole of the trolley steel plate body (601). The end of the traction head car's circular screw (602) is screwed into the threaded hole of the transverse four-wheel solid support frame A (603) for fixation. The trolley wheel axle A (604) is a threaded screw shaft in the middle. It is fixed by screwing through the wheel axle threaded hole of the trolley steel plate body (601). Trolley wheel A (605), trolley wheel B ( 606) are respectively fixed to both ends of the pulley wheel axle A (604); the other 3 wheels are assembled in the same way as this method, and after forming, they form a 4-wheel pulley mode; the two threaded round short rods A (607) are respectively welded to the front and rear sides of the pulley steel plate body (601), with the same elevation; the anti-collision steel block A (608) has a threaded hole in the middle and is fixed to the threaded round short rod A (607) by screwing; the buffer rubber block A (609) is glued to the anti-collision steel block A (608); the front end ear (610) is welded to the front side of the pulley steel plate body (601); the bottom ear (611) is welded to the pulley steel plate body (601). The rear bottom of the plate body (601); the side lugs (612) are welded to the rear bottom edge of the trolley plate body (601); by pushing manually, the traction head car (6) and the intermediate trolley (7) are inserted into the assembly section L-shaped steel A (501) and assembly section L-shaped steel B (502), and the trolley wheels A (605) and B (606) of the head car trolley and the trolley wheels C (705) and D (706) of the intermediate trolley are stably locked in the assembly section L-shaped steel A (501) and assembly section L-shaped steel B (502), so that all trolleys can move stably back and forth on the track beam (5) that bears the longitudinal and transverse loads.

7. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The intermediate trolley (7) comprises a trolley body (701), an intermediate trolley annular screw (702), a transverse four-wheel solid support frame B (703), a trolley wheel axle B (704), a trolley wheel C (705), a trolley wheel D (706), a threaded short rod B (707), a crashworthy steel block B (708), a buffer rubber block B (709), a front side lug (710), a rear side lug (711), and a clamping pulley (712); the trolley body (701) is an open-type lightweight body, its The function is to support the force transmission node component of the dustproof canopy; it is provided with a threaded hole at the top and four wheel axle threaded holes at the front and rear sides; the middle and end of the intermediate trolley ring screw (702) are provided with threads. The ring is manually screwed so that it passes through the threaded hole at the top of the trolley body (701). The middle part of the intermediate trolley ring screw (702) is fixed to the threaded hole at the top of the trolley body (701). The end of the intermediate trolley ring screw (702) is screwed into the threaded hole of the transverse four-wheel solid support frame B (703) for fixation. The pulley wheel axle B (704) is a threaded screw shaft in the middle, which is fixed by screwing through the wheel axle thread hole of the pulley body (701). The pulley wheels C (705) and D (706) are fixed to the two ends of the pulley wheel axle B (704) respectively. The assembly method of the other three wheels is the same as this method, and after forming, it is a 4-wheel pulley mode. The two threaded round short rods B (707) are welded to the front and rear sides of the pulley body (701) respectively, with the same elevation. The anti-collision steel block B (708) has a screw thread in the middle. The groove is fixed to the threaded short rod B (707) by screwing; the buffer rubber block B (709) is glued to the anti-collision steel block B (708); the front side ear (710) is welded to the front bottom edge of the trolley body (701); the rear side ear (711) is welded to the rear bottom edge of the trolley body (701); the clamping pulley (712) is fixed to the middle bottom of the trolley body (701) by fixing bolt (713) to hold the back pull head car retraction steel wire rope (9).

8. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The traction system consists of a tractor (6), intermediate pulleys (7), a tractor forward wire rope (8), a pullback tractor backward wire rope (9), and a pulley traction wire rope (15). The tractor forward wire rope (8) is connected to the front lug (610) of the tractor by a snap-fit ​​connection. The tractor forward wire rope (8) is retrieved by a double roller winch (13) to drive the tractor (6) forward. The front end of the pulley traction wire rope (15) is connected to the side lug (612) of the tractor by a snap-fit ​​connection, and the rear end is connected to the front side lug (710) of the intermediate pulley by a snap-fit ​​connection. The tractor forward wire rope (15) is tightened by the driving force of the tractor forward to drive the tractor backward. Between two adjacent intermediate pulleys (7), the front end of the pulley traction wire rope (15) is connected to the side lug (710) of the intermediate pulley by a snap-fit ​​connection. The rear side lugs (711) of the car are connected by a snap-fit, and the rear side lugs (710) of the middle trolley are connected by a snap-fit. When the middle trolley (7) of the front side moves forward, the traction steel wire rope (15) of the trolley is tightened, which drives the middle trolley (7) of the rear side to move forward. The retraction steel wire rope (9) of the pull-back head car is connected by a snap-fit ​​to the bottom lugs (611) of the traction head car. The double roller winch (13) is used to retrieve the retraction steel wire rope (9) of the pull-back head car, which drives the traction head car (6) to move backward. When the traction head car (6) moves backward, the buffer rubber block A (609) of the traction head car is used to collide with the buffer rubber block B (709) of the middle trolley. The buffer rubber block B (709) of the middle trolley continues to collide with the buffer rubber block B (709) of the subsequent middle trolley, which drives the entire trolley system to move backward.

9. The series trolley-type dustproof canopy device according to claim 1, characterized in that; The connection node between the trolley and the dustproof canopy steel wire rope unit consists of the traction head car circular screw (602), the intermediate trolley circular screw (702), the turnbuckle (1401), the steel wire rope buckle (1402), and the dustproof canopy steel wire rope (1403). One end of the turnbuckle (1401) is connected to the safety buckle of the traction head car's circular screw (602) and the intermediate pulley's circular screw (702) on one side of the foundation pit; the dustproof canopy steel wire rope (1403) passes through the turnbuckle (1401) of the dustproof canopy steel wire rope, and is fixed by 3 steel wire rope buckles (1402) after bending; the dustproof canopy steel wire rope (1403) passes through the circular screw of the traction head car's circular screw (602) and the intermediate pulley's circular screw (702) on the other side of the foundation pit, and is fixed by 3 steel wire rope buckles (1402) after bending; the three horizontal and two vertical roller guides (11) and the double roller winch (13) form the traction system terminal; the three horizontal and two vertical roller guides (11) have a horizontal axis roller A (1103) and a horizontal axis roller Column B (1104), horizontal roller C (1105), vertical roller A (1101), and vertical roller B (1102); the horizontal roller A (1103), horizontal roller B (1104), horizontal roller C (1105), vertical roller A (1101), and vertical roller B (1102) are bolted to the steel shell (1106) of the cable guide; the forward steel wire rope (8) of the traction head car passes through the hole between the horizontal roller A (1103) and the horizontal roller B (1104) and is fixed on one side of the drum of the double roller winch (13); the backward steel wire rope (9) of the pull-back head car passes through the hole between the horizontal roller B (1104) and the horizontal roller C (1105) and is fixed on the other side of the drum of the double roller winch (13).

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