A foundation pit dust reduction device for construction and municipal engineering

Abstract

The present invention provides a foundation pit dust reduction device for building municipal engineering, comprising a plurality of curtains, an installation assembly, a transmission control assembly and a locking assembly. The plurality of curtains are arranged along the extension direction of the length of the foundation pit, the installation assembly comprises a slide rail and a slider, the slide rail extends along the length direction of the foundation pit and is arranged on both sides of the width direction of the foundation pit, a plurality of sliders are slidably arranged on the slide rail, the slider can slide in both directions along the extension direction of the slide rail and can be locked with the slide rail, the transmission control assembly drives the slider to move along the slide rail; the locking assembly locks the slider with the slide rail, four adjacent sliders on the two slide rails are connected to the four corners of the same curtain, and then when the corresponding slider slides, the connected curtain is driven to fold, and when the corresponding slider is locked, the position and shape of the curtain are locked, the coverage area and angle of the curtain unit are controlled, and an appropriate spare area is reserved to adapt to the construction of the tower crane at any position.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a foundation pit dust reduction device for building municipal engineering. Background Art

[0002] In today's construction and municipal engineering, workers will generate a lot of dust during the construction process in the excavated foundation pit, and the dust is easily blown up by the wind to form dust, which will escape and affect the natural environment. Therefore, measures to reduce dust in the foundation pit are an important part of protecting the environment and reducing the escape of construction dust. Setting up a dust reduction canopy above the working surface of the foundation pit has become an effective measure for dust reduction in the foundation pit today.

[0003] The dust suppression sky curtain consists of curtains, steel cables and sprinkler systems. There are two types of dust suppression sky curtains, and the difference lies in the different settings of the steel cables. The first type has two steel cables, which are set on both sides of the foundation pit. The two sides of the curtain are connected to the steel cables on both sides of the foundation pit. The movement of the steel cables will drive the entire curtain to open and close to cover the top of the foundation pit working surface. The second type has multiple steel cables, which are set from one side of the foundation pit to the other side of the foundation pit to cover the top of the foundation pit working surface. There are multiple curtains, and the two ends of the curtains are connected to two adjacent steel cables. The movement of the steel cables drives the movement of the curtains, and the movement of multiple curtains completely covers the sky above the foundation pit working surface.

[0004] The above two types of dust reduction equipment are not conducive to the operation of the tower crane. The curtain of the first type of dust reduction equipment is fixedly connected to the steel cable. The curtain must move in the same direction as the movement of the steel cable, and can only realize the complete opening or closing of the dust reduction curtain. It cannot play a role in dust reduction during the construction of the tower crane; the steel cable of the second type of dust reduction equipment covers the top of the foundation pit working surface, so the steel cable is easy to interfere and collide with the tower crane, and the tower crane cannot fall and rotate at will.

[0005] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention proposes a foundation pit dust reduction equipment for construction and municipal engineering, which can be opened and closed at the required position and leave space for the tower crane to work, and can avoid interference between the steel cable and the tower crane, while ensuring the normal construction of the tower crane and the normal dust reduction and dust suppression effect of the dust reduction equipment.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A foundation pit dust reduction device for building municipal engineering, comprising:

[0009] A plurality of curtains, wherein the plurality of curtains are arranged along the extension direction of the foundation pit;

[0010] The installation assembly includes a slide rail, which extends along the length direction of the foundation pit and is arranged on both sides of the width direction of the foundation pit. Each of the slide rails is provided with a plurality of sliders, which can slide in both directions along the extension direction of the slide rail and can be locked with the slide rail. Four adjacent sliders on two slide rails are connected to the four corners of the same curtain, so that when the corresponding slider slides, the curtain connected thereto is driven to fold, and when the corresponding slider is locked, the position and shape of the curtain are locked;

[0011] A transmission control component, wherein the transmission control component drives the slider to move along the slide rail;

[0012] A locking assembly is used to lock the slider and the slide rail.

[0013] Optionally, the transmission control component includes:

[0014] A traction rope, wherein the traction rope is a flexible closed loop structure, the slide rail and the slider surround a cavity, the traction rope is rotatably arranged in the cavity, the upper section of the traction rope is located above the slider, and the lower section of the traction rope is located below the slider;

[0015] At least one moving part, the moving part includes a push rod and at least two contact members, the push rod is arranged on the slider, the push rod moves in a vertical direction toward or away from the traction rope section on the same side, the contact members are rotatably arranged on the slider, and the movement of the push rod drives the contact members to rotate;

[0016] The contact member has a first state and a second state. When the contact member is in the first state, the contact member contacts the traction rope, and the traction rope drives the slider to move; when the contact member is in the second state, the contact member is separated from the traction rope.

[0017] Optionally, the moving part is provided at both ends of the slider, the moving part provided at the upper end of the slider is used to contact or disengage with the upper section of the traction rope, and the moving part provided at the lower end of the slider is used to contact or disengage with the lower section of the traction rope.

[0018] Optionally, the locking assembly includes a ratchet bar and a pawl, the ratchet bar is provided on one of a pair of side surfaces of the surface of the slide rail that contacts the slider, and the inclination directions of the teeth of the two ratchet bars are opposite;

[0019] The pawl is rotatably arranged at one end of the push rod close to the ratchet bar, and the pawl can be engaged with or disengaged from the ratchet bar closest to itself;

[0020] When the contact piece is in the first state, the push rod connected to the contact piece drives the pawl to disengage from the ratchet bar closest to itself; when the contact piece is in the second state, the push rod connected to the contact piece drives the pawl to cooperate with the ratchet bar closest to itself.

[0021] Optionally, the transmission control component also includes a tension spring, one end of which is fixedly connected to the slider, and the other end of which is fixedly connected to the contact member; when the contact member is in a first state, the tension spring is compressed, and when the contact member is in a second state, the tension spring is stretched.

[0022] Optionally, an electromagnet is provided on the push rod.

[0023] Optionally, the foundation pit dust reduction equipment for construction and municipal engineering further includes a fixed pulley and a tensioning wheel, wherein the fixed pulley is arranged at both ends of the slide rail, the tensioning wheel is rotatably arranged on the slide rail, and the traction rope is wound around the outside of the two fixed pulleys and the plurality of tensioning wheels;

[0024] The tension wheel is provided with notches arranged along the circumferential direction, and when the slider moves to the tension wheel, the moving part can enter the notches.

[0025] Optionally, the mounting assembly further comprises a plurality of coil springs, wherein the coil springs are arranged on a pair of side edges of the curtain, and one end of the coil spring is fixedly connected to the slider for rolling up the pair of side edges of the curtain toward the middle of the curtain.

[0026] Optionally, the mounting assembly further comprises a plurality of coil springs, wherein the coil springs are arranged on one side of the curtain, and one end of the coil springs is fixedly connected to the slider for rolling up one side of the curtain toward the middle of the curtain.

[0027] Optionally, a boss is provided on the slider on one of the two slide rails, and the boss is fixedly connected to one end of the coil spring; a hook is provided on the slider on the other slide rail of the two slide rails, and a lifting hole is provided on the side of the curtain opposite to the rolled-up side, and the hook is connected to the lifting hole.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention provides a controllable slider, which can follow the flexible member to move left and right or be locked on the slide rail, driving the side of the curtain to switch to the left, right or fixed position, so as to realize the size and angle of the opening and closing of a single curtain, control the coverage area and angle of the curtain unit, leave a proper free area, and adapt to the construction of the tower crane at any position.

[0030] 2. The present invention arranges a rolled-up curtain and an elastic member arranged on the curtain. When the distance between the slide rails changes, the extension distance and area of ​​the curtain change accordingly. In addition, different tensioning effects of the fixed pulley and the tensioning member are arranged, so that the foundation pit dust reduction equipment for construction and municipal engineering of the present invention can be applied to dust reduction work in special-shaped foundation pits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of a foundation pit dust reduction device for building municipal engineering according to the present invention;

[0032] Figure 2 for Figure 1 The enlarged view at e in the middle;

[0033] Figure 3 Another overall structural schematic diagram of a foundation pit dust reduction device for building municipal engineering according to the present invention;

[0034] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0035] Figure 5 for Figure 4 The enlarged view of point a in the middle;

[0036] Figure 6 for Figure 4 The enlarged image of point b in the middle;

[0037] Figure 7 It is a structural exploded diagram of the installation components and the curtain in the present invention;

[0038] Figure 8 is a cross-sectional view of the slider in the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the slide rail and the slider in the present invention;

[0040] Fig.10 for Fig. 9 Sectional view at CC;

[0041] Fig.11 for Fig.10 The enlarged image at c in the middle;

[0042] Fig.12 for Fig.10 The enlarged image at point d in the middle;

[0043] Fig.13 This is a schematic structural diagram of a traction rope and a slider according to another embodiment of the present invention;

[0044] Fig.14 For the present invention Fig.13 A schematic diagram of the structure of the tensioning wheel, the traction rope and the slider in the illustrated embodiment;

[0045] Fig.15 For the present invention Fig.13 Another schematic diagram of the structure of the tensioning wheel, traction rope and slider in the illustrated embodiment.

[0046] in:

[0047] 100. Foundation pit;

[0048] 200, curtain; 210, coil spring; 211, coil spring 1; 212, coil spring 2; 220, lifting hole;

[0049] 300, mounting assembly; 310, slide rail; 320, slider; 330, cavity; 321, hook; 322, boss; 323, roller;

[0050] 400, transmission control assembly; 410, traction rope; 420, moving part; 430, fixed pulley; 440, motor; 450, transmission belt; 460, tension wheel; 421, push rod; 422, contact piece; 423, tension spring; 424, electromagnet; 461, notch;

[0051] 500, locking assembly; 510, ratchet bar; 520, pawl; 530, resisting spring;

[0052] 600. Spray assembly. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] like Figures 1 to 15 As shown, the present invention provides a foundation pit dust reduction device for building municipal engineering, which is used for dust reduction of a foundation pit 100, and includes a curtain 200, a mounting assembly 300, a transmission control assembly 400, and a locking assembly 500. The curtain 200 is arranged on the mounting assembly 300, the transmission control assembly 400 and the locking assembly 500 are arranged on the mounting assembly 300, the transmission control assembly 400 drives the curtain 200 to move along the length extension direction of the foundation pit 100, and the locking assembly 500 can stop the curtain 200 from moving.

[0057] There are a plurality of curtains 200 , each of which is in a quadrilateral shape. The curtains 200 are arranged in sequence along the extension direction of the length of the foundation pit 100 , and are used to cover the working surface of the foundation pit 100 to reduce dust.

[0058] The installation assembly 300 includes two slide rails 310, which are E-shaped steel structures. The two slide rails 310 extend along the length direction of the foundation pit 100 and are arranged on both sides of the width direction of the foundation pit 100; each slide rail 310 is provided with a plurality of sliders 320, which are C-shaped structures. The sliders 320 can slide in both directions along the extension direction of the slide rails 310 and are locked on the slide rails 310; the four adjacent sliders 320 on the two slide rails 310 are respectively connected to the four corners of the same curtain 200, so when the slider 320 connected to the curtain 200 slides, the curtain 200 connected thereto is driven to fold or unfold, and when the slider 320 is locked on the slide rail 310, the shape of the curtain 200 connected thereto and the position on the slide rail 310 are locked;

[0059] The transmission control assembly 400 is used to drive the slider 320 to slide bidirectionally on the slide rail 310 to control the curtain 200 connected thereto;

[0060] The locking assembly 500 is used to lock the slider 320 on the slide rail 310 to lock the curtain 200 connected thereto.

[0061] The present invention connects a slider 320 that can slide or lock in both directions on a slide rail 310 to the four corners of the curtain 200 to control the folding or unfolding of the curtain 200 and also enables the curtain 200 to be locked on the slide rail 310. When a tower crane installed in the foundation pit 100 needs construction space, the movement of the curtain 200 and the change in the size of the coverage area are controlled to obtain the construction space of the tower crane.

[0062] In a further embodiment, a spray assembly 600 is further included. The spray assembly 600 is disposed on the side of the slide rail 310 close to the foundation pit 100 and is used to spray dust reduction agents such as water mist to assist in dust reduction.

[0063] In a further embodiment, the transmission control assembly 400 includes a traction rope 410 and at least one moving part 420, the traction rope 410 is a flexible closed loop rope structure, fixed pulleys 430 are arranged at both ends of the slide rail 310 along the length direction of the foundation pit 100, and the axis direction of the rotating part of the fixed pulley 430 is the same as the width direction of the foundation pit 100; the slide rail 310 and the slider 320 arranged thereon surround and form a cavity 330, the traction rope 410 is wound around the outer side of the rotating part of the two fixed pulleys 430 and is rotatably arranged in the cavity 330, the upper section of the traction rope 410 arranged at the upper part of the cavity 330 is located above the slider 320, and the lower section of the traction rope 410 arranged at the lower part of the cavity 330 is located below the slider 320;

[0064] The moving part 420 is arranged at the upper part of the slider 320, and the moving part 420 includes a push rod 421 and at least two contact members 422. A space is provided in the middle of the upper end of the slider 320 in the vertical direction, and a slide groove is provided in the space. The push rod 421 is slidably provided in the slide groove in the vertical direction, and the push rod 421 moves in the vertical direction toward or away from the upper section of the traction rope 410; one end of the push rod 421 close to the upper section of the traction rope 410 is a pointed inclined surface, and the contact member 422 is a C-shaped structure. The two contact members 422 are rotatably provided on the slider 320 along the relative positions of the opening of the C-shaped structure, and the upper ends of the two contact members 422 are close to the upper section of the traction rope 410, and the lower ends of the two contact members 422 are respectively against the two surfaces of the pointed inclined surface of the push rod 421;

[0065] The two contact members 422 have a first state and a second state, as shown in FIG. Figure 5 and Figure 8 At the upper part of the middle slider 320, the push rod 421 moves in the vertical direction in the direction close to the upper section of the traction rope 410, and the left contact piece 422 of the two contact pieces 422 abutting against the push rod 421 rotates in the clockwise direction, and the right contact piece 422 of the two contact pieces 422 rotates in the counterclockwise direction until the two contact pieces 422 contact and press the upper section of the traction rope 410. At this time, the two contact pieces 422 are in the first state, and the friction between the traction rope 410 and the contact piece 422 drives The slider 320 moves following the traction rope 410; the push rod 421 moves in the vertical direction in a direction away from the upper section of the traction rope 410, and the left contact piece 422 of the two contact pieces 422 abutting against the push rod 421 rotates in a counterclockwise direction, and the right contact piece 422 of the two contact pieces 422 rotates in a clockwise direction until the two contact pieces 422 are separated from the upper section of the traction rope 410. At this time, the two contact pieces 422 are in the second state, and the slider 320 stops following the movement of the traction rope 410;

[0066] It should be added that the moving part 420 is provided with tension springs 423 corresponding to the number of the contact members 422, please refer to Figure 8 One end of each tension spring 423 is fixedly connected to the slider 320, and the other end of each tension spring 423 is fixedly connected to the lower end of the corresponding contact piece 422. The tension spring 423 has a tendency to keep the two contact pieces 422 in the first state, and is used to maintain the friction between the two contact pieces 422 and the traction rope 410 when they are in the first state.

[0067] It should also be added that the transmission control component 400 also includes a motor 440 and a transmission belt 450. The motor 440 is arranged on the foundation pit 100, and the transmission belt 450 is a closed loop belt. The transmission belt 450 is wound around a fixed pulley 430 and the output shaft of the motor 440. The output shaft of the motor 440 rotates forward through the transmission belt 450 to drive the fixed pulley 430 to rotate, and the rotation of the fixed pulley 430 drives the traction rope 410 to rotate in one direction; the motor 440 reverses to make the traction rope 410 rotate in another direction, which is used to change the sliding direction of the slider 320 that contacts the traction rope 410.

[0068] In another embodiment, the upper and lower parts of the slider 320 are both provided with a moving part 420, and each push rod 421 moves in the vertical direction to approach or away from the traction rope 410 section on the same side, and each slider 320 has two groups of contact members 422, one end of the push rod 421 close to the traction rope 410 section on the same side is a pointed inclined surface, one end of the contact member 422 is close to the traction rope 410 section on the same side, and the other end of each group of contact members 422 respectively abuts against two surfaces of the pointed inclined surface of a push rod 421;

[0069] The two sets of contact members 422 have a first state and a second state, as shown in FIG. Figure 5 and Figure 8 The push rod 421 moves in the vertical direction in the direction close to the traction rope 410 section on the same side, and one of the contact pieces 422 that abut against the push rod 421 rotates in the clockwise direction, and the other contact piece 422 rotates in the counterclockwise direction until a group of contact pieces 422 contacts and presses the traction rope 410 section on the same side, and a group of contact pieces 422 at one end of the slider 320 is in the first state, and the friction between the traction rope 410 and the contact piece 422 drives the slider 320 to follow the traction rope 410. The push rod 421 moves in the vertical direction away from the traction rope 410 section on the same side, and one of the two contact pieces 422 that abut against the push rod 421 rotates in the counterclockwise direction, and the other contact piece 422 rotates in the clockwise direction until the two contact pieces 422 are separated from the approaching traction rope 410 section. At this time, a group of contact pieces 422 is in the second state, and the slider 320 stops following the movement of the approaching traction rope 410.

[0070] In a further embodiment, the locking assembly 500 includes a ratchet bar 510 and a pawl 520. The ratchet bar 510 is arranged on a pair of upper and lower surfaces of the slide rail 310 in the contact surface with the slider 320 along the extension direction of the slide rail 310. The inclination directions of the teeth on the two ratchet bars 510 are opposite. The pawl 520 is rotatably arranged at the end of each push rod 421 away from the inclined surface. The pawl 520 is engaged or disengaged with the ratchet bar 510 on the same side. When the two contact members 422 on one side are in the first state, the push rod 421 connected to this group of contact members 422 drives the pawl 52 0 is disengaged from the ratchet bar 510 on the same side, i.e., the closest to itself. When this group of contact members 422 is in the second state, the push rod 421 connected to this group of contact members 422 drives the pawl 520 to cooperate with the ratchet bar 510 on the same side, i.e., the closest to itself, and the slider 320 slides on the slide rail 310; when the contact members 422 on both sides of the slider 320 are in the second state, because the teeth of the ratchet bar 510 on one side and the ratchet bar 510 on the other side have opposite inclination directions, the allowed movement directions of the two pawls 520 are opposite, and the slider 320 is locked on the slide rail 310.

[0071] The locking assembly 500 also includes a spring 530, see Fig.11 The springs 530 are fixedly arranged on the slider 320 at a position close to the pawls 520 and the number of the springs 530 corresponds to the number of the pawls 520. One end surface of the springs 530 abuts against the pawls 520, so that the pawls 520 tend to maintain their original positions.

[0072] It should be added that the moving part 420 also includes an electromagnet 424, please refer to Figure 8 When the electromagnet 424 is powered off, the push rod 421 remains in the state where the contact piece 422 is in the second state. When the electromagnet 424 is powered on and attracted, it drives the push rod 421 to move closer to the traction rope 410 section on the same side. When the electromagnet 424 is powered off and disconnected, it drives the push rod 421 to move away from the traction rope 410 section on the same side and return to the initial state.

[0073] When in use, the curtain 200 is unfolded, please refer to Figure 1 In the third state III, when a tower crane is required for construction, the electromagnet 424 at the upper end of the slider 320 is energized, and the push rod 421 at the upper end of the slider 320 moves upward, and the contact member 422 at the upper end of the slider 320 changes from the second state to the first state, and the pawl 520 at the upper end of the slider 320 is disengaged from the ratchet bar 510, and the upper section of the traction rope 410 drives the slider 320 to move. After a period of time, the electromagnet 424 at the upper end of the slider 320 is deenergized, and the slider 320 stops following the movement of the upper section of the traction rope 410. At this time, the pawl 520 at the upper end of the slider 320 cooperates with the ratchet bar 510, and the slider 320 is locked on the slide rail 310. Figure 1As shown in the fourth state IV, a space of 200 curtains is reserved so that the tower crane will not be affected when it is lowering for construction.

[0074] In further embodiments, please refer to Figure 7 , and also includes a coil spring 210, which is arranged on a pair of side edges of the curtain 200 parallel to the length direction of the foundation pit 100, one end of the coil spring 210 is fixedly connected to the slider 320, and the other end of the coil spring 210 is fixedly connected to the curtain 200, so that the pair of side edges of the curtain 200 parallel to the length direction of the foundation pit 100 are rolled up toward the middle of the curtain 200 and have a tendency to be rolled up toward the middle of the curtain 200. When the two slide rails 310 are not arranged in parallel, the relative distance between the sliders 320 arranged on the two slide rails 310 at different times and positions during the sliding process will also be different. The change in the distance between the sliders 320 causes the coil spring 210 to deform, which is used to pull out or retract the rolled-up two sides of the curtain 200 to adapt to the changes in the shape of the foundation pit 100.

[0075] In another embodiment, please refer to Figure 7 , and also includes a coil spring 1 211 and a coil spring 212, which are respectively arranged on the two ends of one side of a pair of side edges of the curtain 200 parallel to the length direction of the foundation pit 100. A boss 322 is arranged on the slider 320 on one of the two slide rails 310, and a hook 321 is arranged on the slider 320 on the other slide rail 310. One end of the coil spring 1 211 and the coil spring 212 are respectively fixedly connected to the bosses 322 on the two sliders 320, and the other ends of the coil spring 1 211 and the coil spring 212 are respectively fixedly connected to the same piece of curtain 200, so that one side of a pair of side edges of the curtain 200 parallel to the length direction of the foundation pit 100 is rolled up toward the middle of the curtain 200 and has a tendency to be rolled up toward the middle of the curtain 200; a lifting hole 220 is arranged on a side of the curtain 200 opposite to the rolled-up side, and the lifting hole 220 cooperates with the hook 321.

[0076] In a further embodiment, the transmission control assembly 400 further includes a tensioning wheel 460, see Figures 13 to 15The tensioning wheel 460 is rotatably arranged on the upper and lower inner sides of the slide rail 310, and the traction rope 410 is wound around the outer sides of multiple tensioning wheels 460 and two fixed pulleys 430 to tension the traction rope 410 into a special-shaped ring structure to adapt to the shape of the special-shaped foundation pit 100; uniformly distributed notches 461 are arranged on the tensioning wheel 460 along the circumference, and when the slider 320 moves to the tensioning wheel 460 with the traction rope 410, the moving part 420 on the slider 320 enters the notch 461, and the tensioning wheel 460 rotates with the rotation of the traction rope 410, and the slider 320 rotates around the tensioning wheel 460 with the curved traction rope 410 until it disengages from the notch 461, thereby avoiding interference between the slider 320 and the tensioning wheel 460 when passing through the curved traction rope 410, so that the slider 320 can move with the arbitrarily curved traction rope 410 and adapt to the shape of the special-shaped foundation pit 100.

[0077] In a further embodiment, a roller 323 is provided on the surface of the slider 320 that contacts the slide rail 310 , so as to reduce the friction force when the slider 320 contacts the slide rail 310 .

[0078] In combination with the above embodiments, the use principle and working process of the present invention are as follows:

[0079] Please refer to Figures 1 to 15 , the unfolding process of the curtain 200 is from the first state I (folded and not unfolded) to the second state II (in the unfolding process) to the third state III (fully unfolded). In the initial state, the curtain 200 is arranged in the first state I along the unfolding direction, and the multiple curtains 200 are adjacent to each other, and the first unfolded curtain, the second unfolded curtain, the third unfolded curtain, and finally unfolded curtain are arranged in the opposite direction of the unfolding direction; in the initial state, each group of contact members 422 on all sliders 320 is in the second state, and all ratchet claws 520 on all sliders 320 cooperate with the ratchet bar 510. The on and off time of the electromagnet 424 is pre-programmed for control.

[0080] When the motor 440 is turned on, the output end of the motor 440 drives the transmission belt 450 to rotate, and the transmission belt 450 drives the rotating shaft of the fixed pulley 430 to rotate, so that the fixed pulley 430 set near the initial position rotates. Figure 1 As shown in the figure e, the traction rope 410 wound around the fixed pulley 430 on the right side of the foundation pit 100 is rotated in the counterclockwise direction along the unfolding direction (from the perspective of the inside of the foundation pit 100 to the outside), and the movement direction of the segment part of the traction rope 410 at the upper part of the cavity 330 is the same direction as the unfolding direction, and the movement direction of the segment part of the traction rope 410 at the lower part of the cavity 330 is opposite to the unfolding direction;

[0081] When dust reduction is required, the first edge of the first curtain that is opened and away from the last curtain is moved in the direction of opening. After time t1, the second edge of the first curtain is moved in the direction of opening. That is, the electromagnet 424 on the upper part of the slider 320 connected to the first edge is energized first, and the push rod 421 on the upper part of the slider 320 moves upward in the vertical direction, and the contact member 422 connected to the push rod 421 rotates until the contact member 422 changes from the second state to the first state. At this time, the pawl 520 on the push rod 421 on the upper part of the slider 320 connected to the first edge is disengaged from the ratchet bar 510 matched therewith, and the slider 320 on the first edge moves with the upper section of the traction rope 410; after time t1, the first curtain that is opened has changed to the third state III, and the first curtain that is opened is then When the electromagnet 424 on the upper part of the slider 320 connected to the second side of the cloth is energized, the slider 320 on the second side performs the same action process as the slider 320 moving on the first side, and the first opening cloth moves along the unfolding direction as a whole; when the first side of the first opening cloth moves to the end of the foundation pit 100, the electromagnets 424 on all the sliders 320 connected to the first opening cloth are simultaneously de-energized, and at this time, the pawl 520 is matched with the ratchet bar 510 again, and the slider 320 is locked on the slide rail 310, the position of the first opening cloth is locked, and the unfolding of the first opening cloth is completed;

[0082] After the first curtain starts to move, the second curtain performs the same movement process as the first curtain after a time t2, and the second curtain is unfolded to the expected position. From the first curtain to the last curtain, the adjacent curtains 200 perform the same movement process as the first curtain after an interval of t2. When all curtains 200 move to the expected position, all curtains 200 are unfolded and cover the working surface of the foundation pit 100, and the foundation pit dust reduction equipment for construction and municipal engineering of the present invention is fully unfolded;

[0083] When the curtain 200 is to be closed, the first edge of the first curtain that is opened and away from the last curtain is first moved in the opposite direction of the opening direction. After a time t1, the second edge of the first curtain is then moved in the opposite direction of the opening direction. That is, the electromagnet 424 at the bottom of the slider 320 connected to the first edge is energized first, and then the push rod 421 at the bottom of the slider 320 moves downward in the vertical direction, and the contact member 422 connected to the push rod 421 rotates until the contact member 422 changes from the second state to the first state. At this time, the pawl 520 on the push rod 421 at the bottom of the slider 320 connected to the first edge and the ratchet bar 510 matched therewith are disengaged, and the slider 320 on the first edge moves with the lower section of the traction rope 410; after time t1, the first curtain that is opened has changed to the first state I, and then the first curtain that is opened is energized. When the electromagnet 424 at the lower part of the slider 320 connected to the second side of the cloth is energized, the slider 320 on the second side performs the same action process as the slider 320 moving on the first side, and the first opening cloth moves in the opposite direction of the opening direction as a whole; when the first side of the first opening cloth moves to the expected position, the electromagnets 424 on all the sliders 320 connected to the first opening cloth are simultaneously de-energized, and at this time, the pawl 520 is matched with the ratchet bar 510 again, the slider 320 is locked on the slide rail 310, the position of the first opening cloth is locked, and the closing of the first opening cloth is completed;

[0084] After the first curtain starts to move, the second curtain moves in the same way as the first curtain after a time t2, and the second curtain closes to the expected position. From the first curtain to the last curtain, the adjacent curtains 200 move in the same way as the first curtain after a time t2, and when all curtains 200 move to the expected position, all curtains 200 are closed, and the foundation pit dust reduction equipment for construction and municipal engineering of the present invention is completely closed;

[0085] When the curtain 200 is fully unfolded, if the tower crane needs construction space, the upper or lower electromagnet 424 on the slider 320 connected to the curtain 200 can be energized. When the upper electromagnet 424 is energized, the slider 320 moves in the unfolding direction, and when the lower electromagnet 424 is energized, the slider 320 moves in the opposite direction of the unfolding direction. The four corners of the curtain 200 can be controlled to move, and any end of each curtain 200 can be controlled to open and close a certain angle to reserve space to avoid the construction position of the tower crane.

[0086] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the attached claims.

Claims

1. A foundation pit dust reduction device for construction and municipal engineering, characterized in that: include: A plurality of curtains, wherein the plurality of curtains are sequentially arranged along the extension direction of the foundation pit; The installation assembly includes a slide rail, which extends along the length direction of the foundation pit and is arranged on both sides of the width direction of the foundation pit, and each of the slide rails is provided with a plurality of sliders; the slide rail is an E-shaped structure, and the slider is a C-shaped structure, and the slider can slide in both directions along the extension direction of the slide rail and can be locked with the slide rail, and the four adjacent sliders on the two slide rails are connected to the four corners of the same curtain, and then when the corresponding slider slides, the curtain connected thereto is driven to fold, and when the corresponding slider is locked, the position and shape of the curtain are locked; A transmission control component, wherein the transmission control component drives the slider to move along the slide rail; A locking assembly, wherein the locking assembly locks the slider and the slide rail; The transmission control assembly includes a traction rope and at least one moving part, the traction rope is a flexible closed loop structure, the slide rail and the slider cooperate to surround and form a cavity, the traction rope is rotatably arranged in the cavity, the upper section of the traction rope is located above the slider, and the lower section of the traction rope is located below the slider; The moving part is arranged at the upper and lower parts of the slider, and the moving part includes a push rod, an electromagnet, at least one group of contact members and a plurality of tension springs. The push rod is arranged on the slider, and the electromagnet is arranged on the push rod. The electromagnet drives the push rod to move in a vertical direction toward or away from the traction rope section on the same side. A group of the contact members includes two contact members, and both of the contact members are C-shaped structures. A group of the contact members is rotatably arranged on the slider at positions relative to the opening of the C-shaped structure. One end of the push rod close to the traction rope section on the same side is a pointed inclined surface, one end of a group of the contact members is close to the traction rope, and the other end is respectively against the two surfaces of the pointed inclined surface of the push rod, and the movement of the push rod drives the contact members to rotate. One end of the plurality of tension springs is fixedly connected to the slider, and the other end is fixedly connected to the contact member. The two groups of contact members have a first state and a second state. When the contact members are in the first state, the contact members are clamped with the traction rope. When the contact members are in the second state, the contact members are separated from the traction rope. The locking assembly includes a ratchet bar and a pawl, wherein the ratchet bar is arranged on a pair of upper and lower surfaces of the slide rail in contact with the sliding block, the teeth of the two ratchet bars are inclined in opposite directions, and the pawl is rotatably arranged at one end of the push rod close to the ratchet bar. When the contact piece is in a first state, the push rod in contact with the contact piece drives the pawl to disengage from the ratchet bar closest to itself. When the contact piece is in a second state, the push rod in contact with the contact piece drives the pawl to cooperate with the ratchet bar closest to itself.

2. The foundation pit dust reduction equipment for construction and municipal engineering according to claim 1 is characterized in that: The foundation pit dust reduction equipment for construction and municipal engineering also includes a fixed pulley and a tensioning wheel, wherein the fixed pulley is arranged at both ends of the slide rail, the tensioning wheel is rotatably arranged on the slide rail, and the traction rope is wound around the two fixed pulleys and the outer sides of the plurality of tensioning wheels; The tension wheel is provided with notches arranged along the circumferential direction, and when the slider moves to the tension wheel, the moving part can enter the notches.

3. The foundation pit dust reduction equipment for construction and municipal engineering according to claim 1, characterized in that: The installation assembly also includes a plurality of coil springs, which are arranged on a pair of side edges of the curtain, and one end of the coil spring is fixedly connected to the slider to roll up the pair of side edges of the curtain toward the middle of the curtain.

4. The foundation pit dust reduction equipment for construction and municipal engineering according to claim 1, characterized in that: The installation assembly also includes a plurality of coil springs, which are arranged on one side of the curtain, and one end of the coil spring is fixedly connected to the slider for rolling up one side of the curtain toward the middle of the curtain.

5. The foundation pit dust reduction equipment for construction and municipal engineering according to claim 4, characterized in that: A boss is arranged on the slider on one of the two slide rails, and the boss is fixedly connected to one end of the coil spring; a hook is arranged on the slider on the other slide rail of the two slide rails, and a lifting hole is arranged on the side of the curtain opposite to the rolled-up side, and the hook is connected to the lifting hole.

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