Construction device for controlling arrangement distance of raft reinforcing steel bars

Abstract

The invention belongs to the technical field of engineering construction, and discloses a construction device for controlling the arrangement distance of raft reinforcing steel bars, the construction device comprises a shell, a lifting mechanism is arranged on the outer wall of the shell, and an adjusting mechanism is arranged on the inner wall of the shell; the adjusting mechanism comprises a moving block, the inner wall of the moving block is slidably connected with a moving plate, the outer wall of the moving block is rotatably connected with a bidirectional threaded rod, the outer wall of the moving plate is provided with a sliding groove, the outer wall of the top end of the moving plate is hinged to a sliding block through a connecting rod, and the inner wall of the shell is elastically connected with a clamping block through a connecting spring. Through cooperation of structures such as the movable plate and the handle, the distance between the multiple fixing mechanisms can be further adjusted by moving the movable block and rotating the two-way threaded rod, then control over the arrangement position of the reinforcing steel bars is facilitated, an operator does not need to manually measure and draw lines or mark points to arrange the reinforcing steel bars, and the working intensity is relieved.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering construction, and in particular relates to a construction device for controlling the spacing of raft slab reinforcement bars. Background Art

[0002] Raft reinforcement layout is a construction operation in which steel bars of different specifications are laid in the raft at specific spacing, direction and arrangement according to design requirements during the raft foundation construction process, and fixed by binding or welding to enhance the bearing capacity of the raft foundation so that it can effectively and evenly transfer the load of the building to the foundation.

[0003] In some existing technologies, in order to ensure that the spacing between each steel bar meets the design requirements when laying raft slab steel bars, it is necessary to frequently use tools for measurement and adjustment. However, manual measurement has poor control over the spacing and may result in measurement errors. In addition, a large number of steel bars need to be laid at one time. Long-term operation can easily lead to hand fatigue and reduced efficiency, which increases the complexity of the operation. Therefore, in view of the above problems, a construction device for controlling the spacing of raft slab steel bars is proposed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a construction device for controlling the spacing of raft reinforcement bars, which solves the problem of the prior art that manual measurement of the spacing of reinforcement bars is laborious and troublesome.

[0005] To achieve the above object, the present invention provides the following technical solution: a construction device for controlling the spacing of raft reinforcement bars, comprising a shell, the outer wall of the shell is provided with a lifting mechanism, and the inner wall of the shell is provided with an adjusting mechanism;

[0006] The adjusting mechanism comprises a moving block, the inner wall of the moving block is slidably connected with a moving plate, the outer wall of the moving block is rotatably connected with a bidirectional threaded rod, the outer wall of the moving plate is provided with a sliding groove, the top outer wall of the moving plate is hinged with a sliding block through a connecting rod, the inner wall of the shell is elastically connected with a clamping block through a connecting spring, the inner wall of the shell is rotatably connected with a rotating shaft, the outer wall of the rotating shaft is wrapped with a traction rope, the outer wall of the shell is fixedly connected with a handle, the outer wall of the handle is slidably connected with a partition, the outer wall of the moving block is provided with a clamping groove, and the front end outer wall of the shell is provided with a fixing mechanism.

[0007] Preferably, the moving block is slidably connected to the inner wall of the shell, the bidirectional threaded rod is threadedly connected to the slider, and the two ends of the traction rope are fixedly connected to the outer walls of the clamping block and the partition respectively.

[0008] Preferably, one end of the connecting rod is hinged to the outer wall of the sliding block, and the other end of the connecting rod is hinged to the outer wall of the moving plate.

[0009] Preferably, one end of the connecting spring is fixedly connected to the outer wall of the block, the other end of the connecting spring is fixedly connected to the inner wall of the shell, the outer wall of the block is slidably connected to the inner wall of the shell, and the block is engaged with the slot.

[0010] Preferably, the fixing mechanism includes a sliding rod, the outer wall of the sliding rod is fixedly connected to a clamp block A, the inner wall of the clamp block A is elastically connected to a clamp block B via a return spring, the outer wall of the clamp block B is fixedly connected to an outer rod, the inner wall of the outer rod is slidably connected to the inner rod, and the outer wall of the outer rod is threadedly connected to a positioning bolt.

[0011] Preferably, the sliding rod is slidably connected to the inner wall of the sliding groove, the clamping block A is slidably connected to the front inner wall of the shell, and the positioning bolt is in contact with the outer wall of the inner rod.

[0012] Preferably, one end of the return spring is fixedly connected to the inner wall of clamp block A, the other end of the return spring is fixedly connected to the outer wall of clamp block B, and clamp block B is slidably connected to the inner wall of clamp block A.

[0013] Preferably, the lifting mechanism comprises a fixed block, the inner wall of the fixed block is slidably connected to a support rod, the outer wall of the fixed block is provided with a groove, the outer wall of the support rod is fixedly connected to a connecting block, and the inner wall of the connecting block is elastically connected to a pull rod via a telescopic spring.

[0014] Preferably, the fixing block is fixedly connected to the outer wall of the shell, the connecting block passes through the outer wall of the fixing block, and the pull rod is clamped in the groove.

[0015] Preferably, one end of the telescopic spring is fixedly connected to the outer wall of the pull rod, the other end of the telescopic spring is fixedly connected to the inner wall of the connecting block, and the outer wall of the pull rod is slidably connected to the inner wall of the connecting block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a movable plate and a handle and other structures, and can initially adjust the spacing of multiple sets of fixing mechanisms by pulling the partition plate and moving the moving block, and then fix the moving block by engaging the clamping block with the clamping slot, and rotate the bidirectional threaded rod to adjust the position of the movable plate, and further adjust the spacing of the multiple sets of fixing mechanisms to make it correspond to the position where the raft slab reinforcement needs to be laid, thereby facilitating the control of the reinforcement laying position, and does not require the operator to manually measure, draw lines or mark points to lay the reinforcement, thereby reducing the work intensity;

[0018] The present invention provides the coordination of structures such as the clamp block B and the outer rod. When adjusting the position of the fixing mechanism, the positioning bolt can be loosened, and the positioning bolt can be tightened after the adjustment is completed, so that the clamp block A and the clamp block B are in contact with the steel bar, so that the steel bar is kept in a vertical fixed state between the clamp block A and the clamp block B. After the steel bar is laid, the outer rod can be pushed to disengage the multiple sets of fixing mechanisms from the steel bar, and the device can be moved to the next step of operation, thereby avoiding the problem that the operator manually lays the steel bar, which may cause the steel bar to tilt and affect the subsequent operation.

[0019] The present invention cooperates with structures such as connecting blocks and support rods. When laying steel bars in an uneven place of the raft slab, the pull rod can be pulled to release the limit of the support rod, and the support rod can be pulled out of the fixed block to a certain length and placed on the ground to keep the overall horizontal state of the device, thereby avoiding the problem that the operator cannot ensure the verticality of the steel bars when laying the steel bars due to the unevenness of the raft slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the shell of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure after the moving block, shell section and fixing mechanism are decomposed according to the present invention;

[0023] Figure 4 It is a schematic diagram of the shell section and the disassembled structure of the moving block of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the clamp block A after section and the movable plate are decomposed according to the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the clamping block A of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the fixing block of the present invention;

[0027] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of part A.

[0028] In the figure: 1. shell; 2. adjustment mechanism; 201. moving block; 202. moving plate; 203. slide groove; 204. connecting rod; 205. slider; 206. two-way threaded rod; 207. clamping block; 208. connecting spring; 209. rotating shaft; 210. traction rope; 211. partition; 212. handle; 213. clamping groove; 3. fixing mechanism; 301. clamping block A; 302. return spring; 303. clamping block B; 304. outer rod; 305. sliding rod; 306. inner rod; 307. positioning bolt; 4. lifting mechanism; 401. fixing block; 402. support rod; 403. groove; 404. connecting block; 405. telescopic spring; 406. pull rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 4 As shown, the present invention provides a construction device for controlling the spacing of raft reinforcement arrangement, comprising a shell 1, a lifting mechanism 4 is arranged on the outer wall of the shell 1, and an adjusting mechanism 2 is arranged on the inner wall of the shell 1; the adjusting mechanism 2 comprises a moving block 201, the inner wall of the moving block 201 is slidably connected with a moving plate 202, the outer wall of the moving block 201 is rotatably connected with a bidirectional threaded rod 206, the outer wall of the moving plate 202 is provided with a slide groove 203, the top outer wall of the moving plate 202 is hinged with a slider 205 through a connecting rod 204, the inner wall of the shell 1 is elastically connected with a clamping block 207 through a connecting spring 208, the inner wall of the shell 1 is rotatably connected with a rotating shaft 209, the outer wall of the rotating shaft 209 is surrounded by a traction rope 210, the outer wall of the shell 1 is fixedly connected with a handle 212, the outer wall of the handle 212 is slidably connected with a partition 211, the outer wall of the moving block 201 is provided with a clamping groove 213, and the front end outer wall of the shell 1 is provided with a fixing mechanism 3.

[0031] The above scheme is adopted: the moving block 201 can move vertically in the shell 1, and the shell 1 provides a basic frame for the movement of the entire adjustment mechanism 2, and the moving plate 202 can slide vertically on the inner wall of the moving block 201; there are multiple groups of slide grooves 203 on the outer wall of the moving plate 202, and the inner wall of each group of slide grooves 203 has a group of sliding rods 305, and the slide grooves 203 on both sides are in an inclined state, and the middle group of slide grooves 203 is in a vertical state. When the moving plate 202 moves up and down, the inner wall of the slide groove 203 squeezes the sliding rod 305, so that the multiple groups of sliding rods 305 can move equidistantly to the middle or both sides at the same time, thereby controlling the spacing of the multiple groups of fixing mechanisms 3, and inserting the raft slab steel bars into the fixing mechanism can control the layout spacing of the raft slab steel bars; the clamping block 207 can slide on the inner wall of the shell 1, and when the moving block 201 is in a suitable position, the clamping block 207 is clamped into the clamping groove 213 on the outer wall of the moving block 201 under the action of the connecting spring 208, thereby fixing the moving block 2 01, preventing it from being displaced by external forces during the steel bar layout process, thereby ensuring the stability of the steel bar layout; when the partition 211 is pulled, one end of the traction rope 210 will be driven to move, and when the traction rope 210 moves, it moves along the outer wall of the rotating shaft 209, causing the rotating shaft 209 to rotate, reducing the friction between the two, and the rotating shaft 209 changes the pulling direction of the traction rope 210, so that the traction rope 210 overcomes the elastic force of the connecting spring 208, and pulls the block 207 out of the slot 213, so that the moving block 201 can move freely again, so as to adjust the overall up and down position of the adjustment mechanism 2 and readjust the spacing of the fixing mechanism 3; the handle 212 is fixed to the outer wall of the shell 1, which is convenient for construction personnel to operate the entire device, and the partition 211 is slidably connected to the outer wall of the handle 212. The construction personnel hold the handle 212 and pull the partition 211 to achieve the pulling operation of the traction rope 210, thereby controlling the engagement and disengagement of the block 207.

[0032] like Figures 1 to 4 As shown, the moving block 201 is slidably connected to the inner wall of the shell 1, the bidirectional threaded rod 206 is threadedly connected to the slider 205, and the two ends of the traction rope 210 are respectively fixedly connected to the outer walls of the block 207 and the partition 211; one end of the connecting rod 204 is hinged to the outer wall of the slider 205, and the other end of the connecting rod 204 is hinged to the outer wall of the moving plate 202; one end of the connecting spring 208 is fixedly connected to the outer wall of the block 207, and the other end of the connecting spring 208 is fixedly connected to the inner wall of the shell 1, the outer wall of the block 207 is slidably connected to the inner wall of the shell 1, and the block 207 is clamped in the slot 213.

[0033] The above scheme is adopted: the bidirectional threaded rod 206 is rotatably connected to the outer wall of the moving block 201 and is threadedly connected to the slider 205. When the bidirectional threaded rod 206 is rotated, due to the transmission effect of the thread, the slider 205 will move along the axial direction of the bidirectional threaded rod 206, and the slider 205 is hinged to the moving plate 202 through the connecting rod 204. The connecting rod 204 guides the bidirectional threaded rod 206, so that the two groups of sliders 205 can move to the middle or both sides at the same time, and drive the connecting rod 204 to flip, which is converted into a rotation of the moving plate 202. The push-pull force changes the position of the movable plate 202 in the movable block 201, and during the adjustment process, the movable block 201 remains fixed to the shell 1, and the bidirectional threaded rod 206 can fine-tune the position of the movable plate 202, so that the spacing of the fixing mechanism 3 can be preliminarily adjusted by pulling the movable block 201, and then the bidirectional threaded rod 206 can be used to further adjust the spacing of the steel bars. This is more convenient and does not require construction personnel to manually measure the spacing of the raft steel bars and mark them before laying them out, thereby improving accuracy.

[0034] like Figures 5 and 6 As shown, the fixing mechanism 3 includes a sliding rod 305, the outer wall of the sliding rod 305 is fixedly connected with a clamping block A301, the inner wall of the clamping block A301 is elastically connected with a clamping block B303 through a reset spring 302, the outer wall of the clamping block B303 is fixedly connected with an outer rod 304, the inner wall of the outer rod 304 is slidably connected with an inner rod 306, and the outer wall of the outer rod 304 is threadedly connected with a positioning bolt 307; the sliding rod 305 is slidably connected to the inner wall of the slide groove 203, the clamping block A301 is slidably connected to the front inner wall of the shell 1, and the positioning bolt 307 contacts the outer wall of the inner rod 306; one end of the reset spring 302 is fixedly connected to the inner wall of the clamping block A301, and the other end of the reset spring 302 is fixedly connected to the outer wall of the clamping block B303, and the clamping block B303 is slidably connected to the inner wall of the clamping block A301.

[0035] The above scheme is adopted: the sliding rod 305 is slidably connected with the inner wall of the slide groove 203 on the movable plate 202, so that the clamping block A301 can slide stably on the front inner wall of the shell 1, and the through groove at the front end of the shell 1 determines the movement trajectory and direction of the clamping block A301, so that it can only move horizontally; the clamping block A301 is a part of the fixing mechanism, and its main function is to cooperate with the clamping block B303 to clamp the raft slab steel bars, and ensure its vertical state during layout, and will not tilt to affect the effect; in the initial state, the reset spring 302 keeps the clamping block B303 in contact with the clamping block A301, and can push the outer rod 304 to drive the clamping block B303 to move so that it is out of contact with the clamping block A301, that is, when the raft slab steel bars are placed between the clamping blocks A301 and B303, the steel bars are clamped, and the reset spring 302 can When the positioning bolts 307 are tightened and in close contact with the outer wall of the inner rod 306, the outer rod 304 and the inner rod 306 are in a fixed state. At this time, pushing a group of outer rods 304 can drive multiple groups of clamping blocks B303 to move synchronously with the outer rod 304 and the inner rod 306, thereby releasing the fixation of the raft slab reinforcement bars at the same time; and when the positioning bolts 307 are loosened to disengage the inner rod 306, the inner rod 306 can slide in the inner wall of the outer rod 304. At this time, the position of the movable plate 202 is adjusted to adjust the spacing of the fixing mechanism 3. The spacing between the two groups of fixing mechanisms 3 changes, and the inner rod 306 moves to the inner wall of the outer rod 304, which will not affect the adjustment of the position of the fixing mechanism 3.

[0036] like Figures 7 and 8 As shown, the lifting mechanism 4 includes a fixed block 401, the inner wall of the fixed block 401 is slidably connected to the support rod 402, the outer wall of the fixed block 401 is provided with a groove 403, the outer wall of the support rod 402 is fixedly connected to the connecting block 404, and the inner wall of the connecting block 404 is elastically connected to the pull rod 406 through the telescopic spring 405; the fixed block 401 is fixedly connected to the outer wall of the shell 1, the connecting block 404 passes through the outer wall of the fixed block 401, and the pull rod 406 is clamped with the groove 403; one end of the telescopic spring 405 is fixedly connected to the outer wall of the pull rod 406, and the other end of the telescopic spring 405 is fixedly connected to the inner wall of the connecting block 404, and the outer wall of the pull rod 406 is slidably connected to the inner wall of the connecting block 404.

[0037] The above scheme is adopted: the fixing block 401 is fixed to the outer wall of the shell 1, and its inner wall is slidably connected with the support rod 402, providing stable support and guiding effect for the support rod 402, and the support rod 402 can slide up and down in the fixing block 401, so as to realize the height adjustment of the whole device to meet the construction requirements of raft foundations of different heights; in the initial state, the pull rod 406 is clamped into the groove 403 of the outer wall of the fixing block 401 under the action of the telescopic spring 405, so as to fix the position of the support rod 402, and prevent the device from being tilted due to its own weight or external factors during use. The height changes due to the action of force; when the height of the device needs to be adjusted, the pull rod 406 is pulled to overcome the elastic force of the telescopic spring 405 to disengage it from the groove 403. At this time, the support rod 402 can slide freely in the fixed block 401. After adjusting to a suitable height, the pull rod 406 is released, and it is re-engaged in the corresponding groove 403 under the action of the telescopic spring 405, fixing the new height position of the support rod 402. Therefore, by adjusting the height of the lifting mechanisms 4 on both sides, the horizontal state can be maintained when the raft slab is of different heights, and the steel bars can be laid out more stably and accurately.

[0038] The working principle and use process of the present invention:

[0039] The operator can first confirm whether the position where the steel bars need to be laid on the raft is uneven. When the height of the raft is uneven, the pull rod 406 can be pulled to disengage it from the groove 403, and then the support rod 402 can be pulled downward out of the fixed block 401. Since the lifting mechanism 4 is provided on both sides of the shell 1, the support rod 402 on one side can be placed at a higher position and the other side can be placed at a lower position, and the distance of the support rods 402 on both sides extending out of the fixed block 401 can be adjusted to keep the shell 1 in a horizontal state, and then the pull rod 406 can be released to re-insert it into the corresponding groove 403 to fix the support rod 402, so as to keep the overall level and stability of the device, and there will be no problems in the laying of steel bars due to the unevenness of the raft.

[0040] Then the operator can loosen the multiple sets of positioning bolts 307 to allow the inner rod 306 and the outer rod 304 to slide, and hold the handle 212 and pull the partition 211, and pull the block 207 out of the slot 213 through the traction rope 210, so that the moving block 201 can move up and down; at this time, according to the steel bar spacing required by the design, the moving block 201 is moved vertically in the shell 1 to roughly determine the position of the fixing mechanism 3; at this time, the moving block 201 drives the moving plate 202 to synchronously move the slide slot 203 to squeeze the sliding rod 305, and the spacing of the multiple sets of fixing mechanisms 3 will change with the movement of the moving plate 202. In the process of moving the fixing mechanism 3, the multiple sets move equidistantly to both sides or the middle ; When the moving block 201 moves to a point where the spacing of the fixing mechanism 3 is roughly close to the spacing required for the raft slab reinforcement, the partition plate 211 is loosened, and the connecting spring 208 causes the clamping block 207 to engage with a set of clamping grooves 213 due to its own elastic force, thereby fixing the position of the moving block 201; then the bidirectional threaded rod 206 can be rotated to make the slider 205 move along its axial direction, thereby driving the connecting rod 204 to flip, generating a push-pull force on the moving plate 202, and achieving fine-tuning of the position of the moving plate 202 in the moving block 201, thereby further accurately adjusting the spacing of the fixing mechanism 3 to achieve the reinforcement spacing accuracy required by the design, and there is no need for construction personnel to manually draw lines or measure points to lay out the reinforcement, which is more convenient to use.

[0041] After the spacing adjustment is completed, the positioning bolts 307 on the outer wall of the outer rod 304 in the fixing mechanism 3 can be tightened to prevent the inner rod 306 from sliding in the inner wall of the outer rod 304, and a group of outer rods 304 can be pushed to drive the clamp block B303 to overcome the elastic force of the return spring 302 and disengage from the clamp block A301, forming a space for the steel bars to be inserted, and the raft slab steel bars are inserted between the clamp blocks A301 and the clamp blocks B303 of each fixing mechanism 3 in turn, and then the outer rod 304 is loosened, and under the action of the return spring 302, the clamp block B303 moves toward the clamp block A301 and clamps the steel bars, and finally the positioning bolts 307 are tightened to fix the outer rod 304 and the inner rod 306, ensuring that the steel bars will not loosen or shift during the laying process; when the raft slab steel bars are laid, the positioning bolts 307 are tightened, and the outer rod 304 is pushed to separate the clamp block B303 from the clamp block A301, so that the clamp block B303 can be disengaged from the raft slab steel bars, and the device is moved as a whole for the next step.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction device for controlling the spacing of raft reinforcement bars, comprising a housing (1), characterized in that: The outer wall of the shell (1) is provided with a lifting mechanism (4), and the inner wall of the shell (1) is provided with an adjusting mechanism (2); The adjusting mechanism (2) comprises a moving block (201), the inner wall of the moving block (201) is slidably connected to a moving plate (202), the outer wall of the moving block (201) is rotatably connected to a bidirectional threaded rod (206), the outer wall of the moving plate (202) is provided with a sliding groove (203), the top outer wall of the moving plate (202) is hinged to a slider (205) via a connecting rod (204), and the inner wall of the housing (1) is connected to the moving plate (206) via a connecting spring (208). ) is elastically connected with a clamping block (207), the inner wall of the shell (1) is rotatably connected with a rotating shaft (209), the outer wall of the rotating shaft (209) is wound with a traction rope (210), the outer wall of the shell (1) is fixedly connected with a handle (212), the outer wall of the handle (212) is slidably connected with a partition (211), the outer wall of the moving block (201) is provided with a clamping groove (213), and the front end outer wall of the shell (1) is provided with a fixing mechanism (3).

2. The construction device for controlling the spacing of raft reinforcement bars according to claim 1 is characterized in that: The moving block (201) is slidably connected to the inner wall of the shell (1), the bidirectional threaded rod (206) is threadedly connected to the slider (205), and the two ends of the traction rope (210) are respectively fixedly connected to the outer wall of the clamping block (207) and the partition (211).

3. The construction device for controlling the spacing of raft reinforcement bars according to claim 1 is characterized in that: One end of the connecting rod (204) is hinged to the outer wall of the sliding block (205), and the other end of the connecting rod (204) is hinged to the outer wall of the moving plate (202).

4. The construction device for controlling the spacing of raft reinforcement bars according to claim 1 is characterized in that: One end of the connecting spring (208) is fixedly connected to the outer wall of the clamping block (207), the other end of the connecting spring (208) is fixedly connected to the inner wall of the shell (1), the outer wall of the clamping block (207) is slidably connected to the inner wall of the shell (1), and the clamping block (207) is clamped to the clamping groove (213).

5. The construction device for controlling the spacing of raft reinforcement bars according to claim 1 is characterized in that: The fixing mechanism (3) comprises a sliding rod (305), the outer wall of the sliding rod (305) is fixedly connected to a clamping block A (301), the inner wall of the clamping block A (301) is elastically connected to a clamping block B (303) via a return spring (302), the outer wall of the clamping block B (303) is fixedly connected to an outer rod (304), the inner wall of the outer rod (304) is slidably connected to an inner rod (306), and the outer wall of the outer rod (304) is threadedly connected to a positioning bolt (307).

6. The construction device for controlling the spacing of raft reinforcement bars according to claim 5, characterized in that: The sliding rod (305) is slidably connected to the inner wall of the sliding groove (203), the clamping block A (301) is slidably connected to the front inner wall of the housing (1), and the positioning bolt (307) is in contact with the outer wall of the inner rod (306).

7. The construction device for controlling the spacing of raft reinforcement bars according to claim 5, characterized in that: One end of the return spring (302) is fixedly connected to the inner wall of the clamping block A (301), and the other end of the return spring (302) is fixedly connected to the outer wall of the clamping block B (303), and the clamping block B (303) is slidably connected to the inner wall of the clamping block A (301).

8. The construction device for controlling the spacing of raft reinforcement bars according to claim 1, characterized in that: The lifting mechanism (4) comprises a fixed block (401), the inner wall of the fixed block (401) is slidably connected to a support rod (402), the outer wall of the fixed block (401) is provided with a groove (403), the outer wall of the support rod (402) is fixedly connected to a connecting block (404), and the inner wall of the connecting block (404) is elastically connected to a pull rod (406) via a telescopic spring (405).

9. The construction device for controlling the spacing of raft reinforcement bars according to claim 8, characterized in that: The fixing block (401) is fixedly connected to the outer wall of the housing (1), the connecting block (404) penetrates the outer wall of the fixing block (401), and the pull rod (406) is clamped with the groove (403).

10. The construction device for controlling the spacing of raft reinforcement bars according to claim 8, characterized in that: One end of the telescopic spring (405) is fixedly connected to the outer wall of the pull rod (406), and the other end of the telescopic spring (405) is fixedly connected to the inner wall of the connecting block (404). The outer wall of the pull rod (406) is slidably connected to the inner wall of the connecting block (404).

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