Foldable lifting equipment for municipal construction and its use method

Abstract

A foldable lifting device for municipal construction and its use method include a crossbeam, with support seats mounted on each end of the crossbeam. The support seats are each mounted above the crossbeam with a rotating seat, each of which is hingedly connected to a pillar. The support seats are provided with longitudinal placement slots on either side of the crossbeam, and the distance between the placement slots on both sides is wider at the bottom and narrower at the top. In the working state, the pillars are rotated by the rotating seats and extend toward the ground. The pillars are located on the lower side of the rotating seats and are fixed in the placement slots. The two pillars on each side of the support seat extend toward the ground in an "eight" shape. In the folded state, the four pillars fold inward laterally and close to one side of the crossbeam. The crossbeam is used to mount an electric hoist. The folding pillars reduce the height of the entire lifting device, making transportation easier. The pillars are positioned and connected with the placement slots of the rotating seats and support seats, making them very convenient to deploy, install, and disassemble. The structure has high strength and good stability.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe jacking equipment, and in particular to foldable lifting equipment for municipal and water conservancy construction and a use method thereof. Background Art

[0002] When pipe jacking is used in municipal engineering projects, pipe jacking equipment needs to be hoisted into the foundation pit. Later in the pipe jacking construction, according to the progress of the pipe jacking operation, the culverts used for pipe jacking need to be continuously hoisted into the foundation pit. Therefore, lifting equipment is required to lift the equipment and culverts. At present, truck cranes are used for lifting. Long-term use of truck cranes not only increases the cost of the project, but also requires the truck crane to rotate back and forth during lifting. The working surface is large, and there are safety hazards when the on-site ground environment is restricted. For example, in the flood control and drainage project currently under construction by the applicant, one of the working wells (pipe jacking operation foundation pit) of the project is located between the highway ramp and the residential area. The ground space is limited and the safety hazard is relatively large. The use of commonly used gantry cranes is not convenient for transportation and installation.

[0003] Chinese patent document CN108706470A, published / announced on October 26, 2018, discloses a foldable crane whose crossbeam and support rods are both hinged on one side in two sections and connected by sleeves. Although this crane achieves the desired folding effect, the crane's stability is greatly reduced. For example, the crane's crossbeam is used to mount an electric hoist, which needs to move back and forth on the crossbeam. To enable the electric hoist to move, the sleeve on the crossbeam cannot be formed into a ring shape and must be opened on the bottom side to avoid the electric hoist's travel path. The open sleeve structure also reduces the stability of the crossbeam, posing a safety hazard when used during construction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide a foldable lifting equipment for municipal construction. The equipment reduces the height of the entire lifting equipment through folding pillars, and is convenient to transport. Through the cooperation of the rotating seat and the placement groove, the pillars can be unfolded, installed and disassembled very conveniently, and the structure has high strength and good stability.

[0005] Another technical problem to be solved by the present invention is to provide a method for using the foldable lifting equipment for municipal construction, through which equipment and culverts can be lifted during pipe jacking operations.

[0006] In order to realize the above-mentioned technical features, the purpose of the present invention is achieved as follows: A foldable lifting equipment for municipal construction includes a beam, which is characterized in that: support seats are respectively installed at both ends of the beam, and rotating seats are respectively installed on the upper sides of the support seats located on both sides of the beam, and each rotating seat is hinged with a pillar; the support seats are located on both sides of the beam and are respectively provided with longitudinal placement grooves, and the distance between the placement grooves on both sides is wide at the bottom and narrow at the top; in the working state, the pillars are rotated by the rotating seats and extended to the ground, and the pillars are located on the lower side of the rotating seat and are fixed in the placement grooves. The two pillars on each side of the support seat extend to the ground in an eight-shaped shape. In the folded state, the four pillars are folded inward laterally and close to one side of the beam; the beam is used to install an electric hoist.

[0007] The support seat includes two side plates, each of which includes support sections on both sides and connecting sections located at the upper ends of the support sections on both sides. The support sections on both sides are in an eight-shaped shape with a larger bottom and a smaller top. A bottom plate is welded on the lower side between the two side plates, and a top plate is welded on the upper side. Sealing plates are welded between the two side plates on both sides of the top plate. The placement groove is formed between the support sections of the two side plates and the bottom plate. At least one limiting hole is provided on each support section, and the limiting hole is connected to the pillar through a pin shaft; the rotating seat is installed on the top plate.

[0008] The angle a between the support sections on both sides of the support seat is 30-35°.

[0009] A notch for installing a crossbeam is provided in the middle portion of the lower side of the support seat.

[0010] The rotating seat includes a groove-shaped part, a rotating shaft and a fixed ring. The two side walls of the groove-shaped part are provided with through holes. The bottom of the groove-shaped part is connected to the rotating shaft on the side away from the through hole. The fixed ring is fixedly installed on the center line of the top plate of the support seat. The rotating shaft is rotatably inserted into the fixed ring. A limiting part is installed on the end of the rotating shaft away from the groove-shaped part. One end of the pillar is installed in the groove-shaped part and is hinged to the through hole and the groove-shaped part.

[0011] A connecting hole is provided at one end of the pillar, and the pillar is hinged to the groove-shaped part of the rotating seat through the connecting hole. A mounting hole is provided on the pillar at a position corresponding to the limiting hole of the support seat. A rounded corner is provided at one end of the pillar located at the connecting hole. In use, the pillar is located at the lower side of the rotating seat and is stuck in the placement groove of the support seat. The limiting hole and the mounting hole are inserted with pins to fix the pillar to the support seat.

[0012] A truss is also installed on the upper side of the crossbeam. The truss is in a triangular structure. The crossbeam is fixed to the middle part of the lower side of the truss. Reinforcement rods are welded on both sides of the crossbeam to connect and fix with the truss.

[0013] One end or both ends of the crossbeam extend out of the support seat.

[0014] The two pillars located on both sides of the beam are cross-connected by tensioning steel cables.

[0015] A method for using the foldable lifting equipment for municipal construction, which is used for pipe jacking construction, comprises the following steps:

[0016] S1. Assemble the equipment in the workshop and install the four pillars on the support base. The connection holes of the pillars are connected to the through holes of the rotating base by pins.

[0017] S2. Fold the equipment: Use the hoisting equipment to unfold the pillars and fold them inward, bringing them close to the beams and securing them securely with ropes.

[0018] S3. Transport the folded equipment to the site via a flatbed truck and use a crane to lift it to the pipe jacking pit.

[0019] S4 untie the rope securing the pillar, install a wire rope above the beam for overall lifting, install a wire rope for expanding the pillar at one end of the four pillars away from the rotating base;

[0020] S5. First, use a crane to unfold the struts so that they are perpendicular to the beam. Then, hook the wire rope above the beam with the crane hook and lift the entire unit. During the lifting process, the struts snap into the slots in the support bases.

[0021] S6. Lower the equipment, bringing the lower end of the support column close to the ground. Climb to the top of the column using a ladder attached to the column. Insert the pin through the stopper and mounting holes, securing the column to the support base. The entire equipment is then hoisted above the pipe jacking pit and lowered to the ground.

[0022] S7. The lower end of the pillar is fixed to the concrete foundation, wherein the concrete foundation is pre-embedded with a steel plate, and the steel plate is welded to the lower end of the pillar;

[0023] S8. Install tensioning wire ropes between the two supports on both sides of the beam, with the tensioning wire ropes connected in a cross-connection manner;

[0024] S9. Use a crane to lift the electric hoist onto the beam. Assisted by a ladder, engage the hoist's travel wheels with the beam and install removable limit stops at the beam ends on that side.

[0025] S10. Install the power cable of the electric hoist;

[0026] S11. After the lifting equipment is installed, the pipe jacking cylinder and its support, as well as the culvert used in the pipe jacking process, are hoisted using the lifting equipment. The crossbeam extends from one or both ends of the support base to the culvert storage area next to the pipe jacking operation pit.

[0027] S12. After the entire pipe jacking project is completed, the lifting equipment will be dismantled, and the pillars will be rotated, folded, and fixed before being transported back to the storage workshop.

[0028] The present invention has the following beneficial effects:

[0029] 1. Support bases are installed at both ends of the beam. Rotating bases are installed above the support bases on both sides of the beam, and pillars are hinged to each rotating base. The rotating bases allow the pillars to rotate on the support bases and fold back and forth. Slots are used to limit and secure the pillars, allowing them to be quickly deployed without shaking. In the operating state, the pillars connect to the support bases below the rotating bases, so that the two pillars on each side extend toward the ground in an "eight" shape. In the folded state, the four pillars fold inward and close to one side of the beam. The beam is used to mount an electric hoist. The folding pillars reduce the height of the entire lifting equipment, making it easy to transport. The pillars are connected to the rotating bases and support bases, making them very easy to deploy, install, and disassemble. The structure is strong and stable.

[0030] 2. A truss is also installed on the upper side of the beam. The truss has a triangular structure. The beam is fixed to the middle of the lower side of the truss. Reinforcement rods are welded on both sides of the beam to connect and fix it to the truss, which improves the structural bearing capacity and stability of the beam.

[0031] 3. The use of the lifting equipment of the present application for pipe jacking construction replaces the mobile crane, greatly reducing construction costs, eliminating the safety hazards of using the mobile crane in narrow environments, ensuring operational safety, and reducing noise and air pollution caused by mobile cranes in residential areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the main structure of the present invention in use.

[0033] Figure 2 It is a side view structural diagram of the present invention in use.

[0034] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0035] Figure 4 This is a schematic diagram of the main structure of the support seat of the present invention.

[0036] Figure 5 It is a side structural schematic diagram of the support seat of the present invention.

[0037] Figure 6 It is a structural schematic diagram of the support of the present invention.

[0038] Figure 7 It is a schematic diagram of the structure of the present invention in a folded state.

[0039] Figure 8 It is a structural schematic diagram of the connection between the support seat and the rotating seat, and the rotating seat and the pillar of the present invention.

[0040] Figure 9 It is a schematic diagram of the present invention during pipe jacking construction.

[0041] In the figure: crossbeam 1, support base 2, side plate 21, top plate 22, bottom plate 23, sealing plate 24, placement groove 25, limiting hole 26, first pin 261, notch 27, support section 28, connecting section 29, pillar 3, connecting hole 31, mounting hole 32, fillet 33, truss 4, reinforcing rod 41, rotating base 5, groove part 51, through hole 511, second pin 512, rotating shaft 52, fixing ring 53, limiting part 54, tensioning wire rope 6, ladder 7, electric hoist 8, working well 9, culvert 10. DETAILED DESCRIPTION

[0042] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0043] Example 1:

[0044] See also Figure 1-8 A foldable lifting device for municipal construction includes a crossbeam 1, with support bases 2 mounted on each end. A rotating base 5 is mounted above each side of the crossbeam 1, with a support 3 hingedly connected to each rotating base 5. The support bases 2 are provided with longitudinal placement slots 25 on either side of the crossbeam 1, with the distance between the placement slots 25 being wider at the bottom and narrower at the top. In operation, the support 3 rotates through the rotating base 5 and extends toward the ground. The support 3 is located below the rotating base 5 and is fixed in the placement slots 25. The two support bases 3 on each side of the support base 2 extend toward the ground in an "eight" shape. In the folded state, the four support bases 3 fold inward laterally and approach one side of the crossbeam 1. The crossbeam 1 is used to mount an electric hoist 8. The folded support bases 3 reduce the height of the entire lifting device, making transportation easier. The support bases are positioned and connected with the placement slots 25 of the rotating base and support base 2, making deployment, installation, and disassembly very convenient. The structure also boasts high strength and stability. Preferably, the crossbeam 1 is constructed of I-beam steel.

[0045] See also Figure 4 、 58. The support base 2 includes two side panels 21, each of which includes support sections 28 on both sides and connecting sections 29 located at the upper ends of the support sections 28 on both sides. The support sections 28 on both sides are in an "eight" shape with a larger bottom and a smaller top. A bottom plate 23 is welded to the lower side between the two side panels 21, and a top plate 22 is welded to the upper side. A sealing plate 24 is welded between the two side panels 21 on both sides of the top plate 22. A placement groove 25 for mounting and positioning the pillar 3 is formed between the support sections 28 and the bottom plate 23 of the two side panels 21. Two limiting holes 26 are respectively provided on the support sections 28. The limiting holes 26 are connected to the pillar 3 via a first pin 261; the rotating base 5 is mounted on the top plate 22. Through the above structure, the support base 2 has high structural strength and good stability.

[0046] Preferably, the angle a between the support segments 28 on both sides of the support base 2 is 30-35 degrees. At this angle, not only the support height (lifting height) of the beam 1 can be guaranteed, but also the stability of the beam 1 can be guaranteed, and the stability and support height can be balanced.

[0047] See also Figure 3 、 4 The middle part of the lower side of the support seat 2 is provided with a notch 27 for installing the crossbeam 1. The notch 27 is used to install the crossbeam 1. When in use, the crossbeam 1 is inserted into the notch 27 and then welded and fixed, which improves the stability of the crossbeam 1.

[0048] See also Figure 3 、 8 The rotating seat 5 includes a groove member 51, a rotating shaft 52 and a fixing ring 53. The two side walls of the groove member 51 are provided with a through hole 511. The bottom of the groove member 51 is connected to the rotating shaft 52 on the side away from the through hole 511. The fixing ring 53 is fixedly installed on the center line of the top plate 22 of the support seat 2. The rotating shaft 52 is inserted into the fixing ring 53 by rotation. A limit member 54 is installed on the end of the rotating shaft 52 away from the groove member 51. One end of the pillar 3 is installed in the groove member 51. The pillar 3 is hinged to the groove member 51 through a second pin 512. By providing the rotating seat 5, the pillar 3 can rotate on the support seat 2 and can be rotated and folded. The limit member 54 can be a nut or a pin.

[0049] See also Figure 6 One end of the support 3 is provided with a connecting hole 31, through which the support 3 is hingedly connected to the groove member 51 of the rotating base 5. A mounting hole 32 is provided on the support 3 at a position corresponding to the limiting hole 26 of the support base 2. The end of the support 3 located at the connecting hole 31 is provided with a rounded corner 33. In use, the support 3 is located on the lower side of the rotating base 5 and is clamped in the placement groove 25 of the support base 2. The limiting hole 26 and the mounting hole 32 are inserted into the pin to fix the support 3 to the support base 2. The structure is simple and easy to manufacture.

[0050] See also Figure 1-3A truss 4 is also installed on the upper side of the beam 1. The truss 4 is a triangular structure. The beam 1 is fixed to the middle part of the lower side of the truss 4. Reinforcement rods 41 are welded on both sides of the beam 1 and connected and fixed to the truss 4 to improve the structural strength and stability of the beam 1.

[0051] See also Figure 1 One end or both ends of the beam 1 extend out of the support base 2 to extend the beam 1, thereby facilitating the lifting of the culvert placed outside the foundation pit. Of course, in order to ensure the structural strength of the beam 1, the truss 4 also needs to be extended.

[0052] See also Figure 1 The two pillars 3 located on both sides of the beam 1 are cross-connected by tensioning wire ropes 6 to enhance the overall stability of the equipment.

[0053] Example 2:

[0054] See also Figure 9 A method for using the foldable lifting equipment for municipal construction, which is used for pipe jacking construction, comprises the following steps:

[0055] S1. Assemble the equipment in a workshop and install four pillars 3 on the support base 2 , respectively. The connection holes 31 of the pillars 3 are connected to the through holes 511 of the rotating base 5 via pins.

[0056] S2. Fold the equipment; unfold the pillar 3 using the lifting equipment, fold it inward, bring the pillar 3 close to the beam 1, and secure it firmly with ropes.

[0057] S3. The folded equipment is transported to the site via a flatbed truck and hoisted to the side of the pipe jacking work pit 9 using a crane.

[0058] S4. Untie the ropes that secure the pillars 3, install a wire rope for overall lifting above the beam 1, and install a wire rope for deploying the pillars 3 at one end of the four pillars 3 away from the rotating base 5.

[0059] S5. First, use a crane to unfold the pillar 3 so that the pillar 3 is perpendicular to the beam 1. Then use the crane hook to hook the wire rope above the beam 1 and lift the entire device. During the lifting process, the pillar 3 is snapped into the placement groove 25 of the support base 2.

[0060] S6. Lower the equipment so that the lower end of the equipment's support 3 is close to the ground. A person climbs to the top of the support 3 via the ladder 7 fixed to the support 3, inserts the pin into the limit hole 26 and the mounting hole 32, and fixes the support 3 to the support base 2. Then, hoist the entire equipment to the top of the pipe jacking operation working pit 9 and lower the equipment to the ground.

[0061] S7. Fix the lower end of the pillar 3 to the concrete foundation, wherein the concrete foundation is pre-embedded with a steel plate, and the steel plate is welded to the lower end of the pillar 3.

[0062] S8. Install the tensioning wire ropes 6 between the two pillars 3 on both sides of the beam 1. The tensioning wire ropes 6 are cross-connected.

[0063] S9. Use a crane to lift the electric hoist 8 onto the beam 1. Personnel assist by climbing the ladder 7. The traveling wheels on the electric hoist 8 are inserted into the beam 1, and a detachable limit card is installed at the end of the beam 1 on that side. The limit card is fixed and welded on the other side of the beam 1 in advance. The limit card is used to prevent the electric hoist 8 from rushing out of the beam 1.

[0064] S10. Install the power cable of the electric hoist 8.

[0065] S11. After the installation of the lifting equipment is completed, the jacking cylinder and its support, as well as the culvert 10 used in the jacking process, are lifted into the working well 9 by the lifting equipment; wherein, the crossbeam 1 extends from one end or both ends of the support base 2 to the culvert stacking area next to the jacking operation well.

[0066] S12. After the entire pipe jacking project is completed, the lifting equipment is removed, and the support 3 is rotated, folded, and fixed before being transported back to the storage workshop.

[0067] The use of the lifting equipment of the present application for pipe jacking operations replaces the mobile crane, greatly reducing construction costs, eliminating the safety hazards of using the mobile crane in narrow environments, ensuring operational safety, and reducing noise and air pollution caused by the mobile crane in residential areas.

Claims

1. A foldable lifting device for municipal construction, comprising a beam (1), characterized in that: The two ends of the beam (1) are respectively provided with support seats (2), and the support seats (2) are respectively provided with rotating seats (5) above the two sides of the beam (1), and each rotating seat (5) is hinged with a pillar (3); the support seats (2) are respectively provided with longitudinal placement grooves (25) on both sides of the beam (1), and the distance between the placement grooves (25) on both sides is wider at the bottom and narrower at the top; in the working state, the pillars (3) are rotated by the rotating seats (5) and extended to the ground, and the pillars (3) are located at the lower side of the rotating seat (5) and are fixed in the placement grooves (25), and the two pillars (3) on each side of the support seat (2) are extended to the ground in an eight-shaped shape, and in the folded state, the four pillars (3) are folded inward and close to one side of the beam (1); the beam (1) is used to install an electric hoist (8); The support seat (2) includes two side plates (21), and the side plates (21) include support sections (28) on both sides and connecting sections (29) located at the upper ends of the support sections (28) on both sides. The support sections (28) on both sides are in an "eight" shape with a larger bottom and a smaller top. A bottom plate (23) is welded on the lower side between the two side plates (21), and a top plate (22) is welded on the upper side. A sealing plate (24) is welded on both sides of the top plate (22) between the two side plates (21). The placement groove (25) is formed between the support sections (28) of the two side plates (21) and the bottom plate (23). At least one limiting hole (26) is provided on each support section (28), and the limiting hole (26) is connected to the pillar (3) through a pin shaft. The rotating seat (5) is installed on the top plate (22).

2. The foldable lifting equipment for municipal construction according to claim 1, characterized in that: The angle a between the support sections (28) on both sides of the support seat (2) is 30-35°.

3. The foldable lifting equipment for municipal construction according to claim 1, characterized in that: A notch (27) for mounting the crossbeam (1) is provided in the middle portion of the lower side of the support seat (2).

4. The foldable lifting equipment for municipal construction according to claim 1, characterized in that: The rotating seat (5) includes a groove member (51), a rotating shaft (52) and a fixing ring (53). The two side walls of the groove member (51) are provided with through holes (511) therethrough. The bottom of the groove member (51) is connected to the rotating shaft (52) on the side away from the through hole (511). The fixing ring (53) is fixedly installed on the center line of the top plate (22) of the support seat (2). The rotating shaft (52) is installed in the fixing ring (53) by rotating and fitting. A limiting member (54) is installed at one end of the rotating shaft (52) away from the groove member (51). One end of the pillar (3) is installed in the groove member (51) and is hinged to the through hole (511) and the groove member (51).

5. The foldable lifting equipment for municipal construction according to claim 4, characterized in that: One end of the pillar (3) is provided with a connecting hole (31), and the pillar (3) is hinged to the groove member (51) of the rotating seat (5) through the connecting hole (31). A mounting hole (32) is provided on the pillar (3) at a position corresponding to the limiting hole (26) of the support seat (2). One end of the pillar (3) located at the connecting hole (31) is provided with a rounded corner (33). In the use state, the pillar (3) is located at the lower side of the rotating seat (5) and is clamped in the placement groove (25) of the support seat (2). The limiting hole (26) and the mounting hole (32) are inserted with a pin to fix the pillar (3) to the support seat (2).

6. The foldable lifting equipment for municipal construction according to claim 1, characterized in that: A truss (4) is also installed on the upper side of the crossbeam (1), and the truss (4) is in a triangular structure. The crossbeam (1) is fixed to the middle part of the lower side of the truss (4), and reinforcing rods (41) are welded on both sides of the crossbeam (1) to connect and fix with the truss (4).

7. The foldable lifting equipment for municipal construction according to claim 1, characterized in that: One end or both ends of the crossbeam (1) extend out of the support seat (2).

8. The foldable lifting equipment for municipal construction according to claim 5, characterized in that: Two pillars (3) located on both sides of the crossbeam (1) are cross-connected via tensioning steel wire ropes (6).

9. A method for using the foldable lifting equipment for municipal construction according to claim 8 for pipe jacking operations, characterized in that: The following steps are involved: S1. Assemble the equipment in a workshop and install the four pillars (3) on the support base (2), wherein the connection holes (31) of the pillars (3) are connected to the through holes (511) of the rotating base (5) via pins; S2. Fold the device; unfold the support (3) by lifting the device and fold it inward so that the support (3) is close to the beam (1) and is firmly fixed with a rope; S3. The folded equipment is transported to the site via a flatbed truck and hoisted to the pipe jacking work pit (9) by a crane; S4. Untie the ropes securing the pillars (3), install a wire rope for lifting the entire structure above the beam (1), and install a wire rope for unfolding the pillars (3) at one end of the four pillars (3) away from the rotating seat (5); S5. First, use a crane to unfold the pillar (3) so that the pillar (3) is perpendicular to the beam (1). Then, use a crane hook to hook the wire rope above the beam (1) and lift the entire device. During the lifting process, the pillar (3) is snapped into the placement groove (25) of the support base (2); S6. Lower the equipment so that the lower end of the support (3) of the equipment is close to the ground. A person climbs to the top of the support (3) via a ladder (7) fixed to the support (3), inserts the pin into the limit hole (26) and the mounting hole (32), and fixes the support (3) to the support base (2); then hoist the entire equipment to the top of the pipe jacking operation pit (9), and lower the equipment to the ground; S7. The lower end of the pillar (3) is fixed to the concrete foundation, wherein the concrete foundation is pre-embedded with a steel plate, and the steel plate is welded to the lower end of the pillar (3); S8. Installing the tensioning wire rope (6) between the two pillars (3) on both sides of the beam (1), the tensioning wire rope (6) is cross-connected; S9. Use a crane to lift the electric hoist (8) onto the beam (1), with assistance from a person using a ladder (7). The travel wheel on the electric hoist (8) is engaged with the beam (1), and a removable limit card is installed at the end of the beam (1) on that side. S10. Install the power cable of the electric hoist (8); S11. After the installation of the lifting equipment is completed, the jacking cylinder and its support, as well as the culvert (10) used in the jacking process, are hoisted into the working pit (9) by the lifting equipment; wherein, the crossbeam (1) extends from one end or both ends of the support seat (2) to the culvert stacking area next to the jacking operation pit; S12. After the entire pipe jacking project is completed, the lifting equipment is dismantled, and the support (3) is rotated, folded, fixed, and transported back to the storage workshop.

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