A connecting device for precast concrete components of urban infrastructure

Abstract

The present invention relates to the field, and specifically relates to a connecting device for concrete precast components of urban infrastructure, including a rotating rod, two sets of assembling mechanisms and a plurality of precast slabs. The two sets of assembling mechanisms are symmetrically arranged at both ends of the plurality of precast slabs. The rotating rod is arranged between the two sets of assembling mechanisms and fixedly connected to both sets of assembling mechanisms. Each set of assembling mechanisms includes a rotating component and two sets of pressing components. The rotating component is fixedly arranged at one end of the rotating rod. The two sets of pressing components are symmetrically and fixedly arranged on both sides of the rotating component, and the two sets of pressing components are respectively arranged corresponding to two adjacent precast slabs. By adjusting the distance between the two rotating shafts, embedding the pressing block into the embedding groove of the precast slab, and manually rotating the adjusting handle, the concrete precast slabs can be tightly spliced and hoisted, which is convenient, fast, safe and efficient, and can greatly improve the splicing and hoisting efficiency of the concrete precast slabs.

Description

Technical Field

[0001] The present invention relates to the field, and specifically relates to a connecting device for concrete precast components of urban infrastructure. Background Art

[0002] Concrete precast components are building components prefabricated in a factory with concrete as the basic material, including beams, slabs, columns, and building decoration fittings, etc. Explanation: They are for on-site assembly, and are the material basis for building industrialization. Prefabricated concrete components that have been manufactured before installation at the construction site. Generally common ones include precast concrete slabs, concrete box girders for bridges, precast concrete roof truss beams for industrial factories, culvert frames, precast concrete piles for foundation treatment, etc.

[0003] During the transportation and hoisting of concrete precast components, the plate surfaces often crack or even break. The reason is that the spans of some precast slabs are too large, and there is extrusion between the plates during transportation, resulting in component damage. Before hoisting the precast components, they are very likely to fall off or be side-offset. It is also necessary to formulate a targeted splicing and hoisting construction plan according to the single-piece quality, shape, installation height, and site conditions of the precast components, which is time-consuming and laborious, and the work efficiency is very low. Therefore, it is necessary to design a connecting device for concrete precast components of urban infrastructure. Summary of the Invention

[0004] The purpose of the present invention is to provide a connecting device for concrete precast components of urban infrastructure.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Provide a connecting device for concrete precast components of urban infrastructure, including a rotating rod, two groups of assembling mechanisms, and several precast slabs. The two groups of assembling mechanisms are symmetrically arranged at both ends of the several precast slabs. The rotating rod is arranged between the two groups of assembling mechanisms and is fixedly connected to both groups of assembling mechanisms. Each group of assembling mechanisms includes a rotating assembly and two groups of pressing assemblies. The rotating assembly is fixedly arranged at one end of the rotating rod. The two groups of pressing assemblies are symmetrically and fixedly arranged on both sides of the rotating assembly, and the two groups of pressing assemblies are respectively arranged corresponding to two adjacent precast slabs.

[0007] Furthermore, on one side of both ends of each precast slab, two embedding grooves are symmetrically provided. In the middle of each embedding groove, two avoiding grooves are symmetrically provided. On one side of each precast slab, a rectangular male tenon is fixedly provided. A first chamfer is provided on the outer edge of the rectangular male tenon. On the other side of the precast slab, a rectangular female tenon is fixedly provided. A second chamfer is provided on the outer edge of the rectangular female tenon.

[0008] Further, the rotation assembly includes a rotating shaft, an adjusting handle, a mounting cover, a worm gear, a worm, and a bidirectional threaded rod. The bidirectional threaded rod is rotatably arranged on one side of the bottom of the mounting cover and passes through the mounting cover. The worm gear is fixedly arranged on the bidirectional threaded rod, and the worm gear is located inside the mounting cover. The rotating shaft is rotatably arranged on one side of the mounting cover and passes through the mounting cover. The worm is fixedly arranged on the rotating shaft, and the worm is located inside the mounting cover and meshed with the worm gear.

[0009] Further, each set of the pressing assemblies includes a sliding sleeve, a limiting block, and a pressing block. One end of the sliding sleeve is fixedly arranged on one side of the mounting cover, and a limiting chute is arranged at the bottom of the sliding sleeve. The top of the pressing block is slidably arranged in the limiting chute, and the pressing block is threadedly connected to one end of the bidirectional threaded rod. The limiting block is fixedly arranged at the other end of the sliding sleeve, and the bidirectional threaded rod is rotatably arranged on the limiting block.

[0010] Further, two mounting grooves are symmetrically arranged on both sides of the bottom of the pressing block. Each mounting groove is provided with a clamping component. Each set of the clamping components includes a one-way block and two return springs. The two return springs are symmetrically and fixedly arranged inside the corresponding mounting groove. The one-way block is arranged in a right trapezoid shape, and the one-way block is fixedly connected to one end of the two return springs. The one-way block is in contact with the corresponding avoidance groove.

[0011] Further, an adjusting mechanism is arranged in the middle of the rotating rod. The adjusting mechanism includes a telescopic sleeve and two sets of telescopic components. The two sets of telescopic components are symmetrically arranged at both ends of the telescopic sleeve. A telescopic cavity is arranged inside the telescopic sleeve. A limiting groove is arranged on the inner wall of the telescopic cavity, and inner rings are symmetrically and fixedly arranged at both ends of the telescopic cavity. A plurality of adjusting grooves are evenly arranged in a straight line at the top of the telescopic sleeve.

[0012] Further, each set of the telescopic components includes a connecting shaft and a limiting disc. One end of the connecting shaft is fixedly connected to the end of the rotating rod, and the other end of the connecting shaft is arranged inside the telescopic cavity. The limiting disc is fixedly arranged at the other end of the connecting shaft, and the outer edge of the limiting disc is slidably arranged on the inner wall of the telescopic cavity. The limiting disc is in contact with the corresponding inner ring.

[0013] Further, a convex column is fixedly arranged on the side of the connecting shaft. The convex column is slidably connected to the corresponding limiting groove. A control groove is arranged beside the convex column. Two limiting strips are symmetrically and fixedly arranged on both sides of the outer edge of the control groove.

[0014] Further, a pressing column is arranged inside the control groove. One end of the pressing column is fixedly provided with a pressing-down column, and the other end of the pressing column is fixedly provided with a resisting column. The pressing-down column and the resisting column are slidably arranged in the control groove, and the pressing-down column and the resisting column are in contact with the two limiting strips. Two telescopic springs are symmetrically arranged at the bottom of the resisting column. The two telescopic springs are welded to the bottom of the inner wall of the control groove.

[0015] Beneficial effects of the present invention:

[0016] 1. First, manually press the pressure column, which drives the pressure column box to move in the control groove, so that the resist column moves into the control groove, so that the resist column compresses the two telescopic springs, so that the resist column disengages from the corresponding adjustment groove on the telescopic sleeve, and then manually pulls the connecting shaft and the rotating rod to slide in the telescopic cavity, so as to adjust the distance between the two assembly mechanisms to reach the length of the prefabricated board. After the adjustment is completed, release the pressure column, so that the two telescopic springs drive the pressure column to reset, so that the resist column again presses against the corresponding adjustment groove, thereby locking the connecting shaft and the telescopic sleeve. Through the cooperation of the resist column and each adjusting groove, the device can be applied to prefabricated boards of various lengths. Since the two one-way blocks press against the two avoidance grooves, it is not easy for the two one-way blocks to disengage from the embedded grooves. At this time, the length of the two connecting shafts can be extended from the telescopic cavity, thereby releasing the two one-way blocks, and then taking out the device from the two prefabricated boards.

[0017] 2. The bottom ends of the two pressing blocks are respectively inserted into the embedded grooves at one end of the corresponding two prefabricated panels. When the pressing blocks move downward, the one-way blocks on both sides of the pressing blocks are located in the corresponding installation grooves and compress the reset springs. As the pressing blocks move downward, when the one-way blocks are on the horizontal line of the avoidance grooves, the reset springs are reset and one end of the one-way blocks pops out to the top of the column avoidance grooves, thereby locking the pressing blocks and the prefabricated panels in the vertical direction. The two one-way blocks are set in contact with the corresponding two avoidance grooves, so that the two pressing blocks will not slide out from the top of the corresponding two embedded grooves when the two prefabricated panels are assembled.

[0018] 3. When the adjusting handle is manually turned and the rotating shaft is driven to rotate, the rotating shaft drives the worm and worm gear to rotate, and the worm gear drives the two-way threaded rod to rotate, so that the two-way threaded rod cooperates with the limiting slide groove to drive the two pressure blocks to move toward each other, so that the two pressure blocks splice the two prefabricated panels, and the rectangular male tenon of the prefabricated panel cooperates with the rectangular female tenon of the other prefabricated panel. The first chamfer and the second chamfer are for correcting the deviation when the two prefabricated panels are spliced. At the same time, the rotating shaft also drives the rotating rod and the connecting shaft to rotate, so that the connecting shaft drives the adjusting mechanism to rotate and drives the other connecting shaft to rotate, so as to achieve the purpose of synchronous rotation, so that when the two ends of the prefabricated panel are spliced at the same time, the horizontal and vertical are tightly engaged to avoid falling off or lateral deviation.

[0019] The present invention adjusts the distance between the two rotating shafts, embeds the pressing block into the embedding groove of the precast plate, and manually rotates the adjusting handle to tightly splice and hoist the concrete precast plate. This is convenient, fast, safe and efficient, and can greatly improve the splicing and hoisting efficiency of the concrete precast plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0021] Figure 1Schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 Schematic diagram of the three-dimensional structure of the precast slab of the present invention;

[0023] Figure 3 Partial disassembly schematic diagram of the precast slab and two groups of assembly mechanisms of the present invention;

[0024] Figure 4 is Figure 3 Enlarged schematic diagram at position A in

[0025] Figure 5 Disassembly schematic diagram of the pressing block and the clamping position assembly of the present invention;

[0026] Figure 6 Schematic diagram of the three-dimensional structure of the adjusting mechanism of the present invention;

[0027] Figure 7 Disassembly schematic diagram of the adjusting mechanism of the present invention;

[0028] Figure 8 is Figure 7 Enlarged schematic diagram at position B in

[0029] Figure 9 is Figure 7 Enlarged schematic diagram at position C in

[0030] In the figure:

[0031] Rotating rod 1;

[0032] Assembly mechanism 2, rotating assembly 20, rotating shaft 200, adjusting turning hand 201, mounting cover 202, worm gear 203, worm 204, bidirectional threaded rod 205, pressing assembly 21, sliding sleeve 210, limiting chute 2100, limiting block 211, pressing block 212, mounting groove 2120, clamping position assembly 22, one-way block 220, return spring 221;

[0033] Precast slab 3, embedding groove 30, avoidance groove 31, rectangular male tenon 32, first chamfer 320, rectangular female tenon 33, second chamfer 330;

[0034] Adjusting mechanism 4, telescopic sleeve 40, telescopic cavity 400, inner ring 4000, limiting groove 401, adjusting groove 402, telescopic assembly 41, connecting shaft 410, convex column 4100, control groove 4101, limiting strip 4102, limiting disc 411, pressing column 412, pressing-down column 4120, resisting column 4121, telescopic spring 4122. Detailed implementation manners

[0035] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0036] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams rather than actual product drawings, and should not be construed as a limitation to this patent; for a better illustration of the embodiments of the present invention, some components in the attached drawings are omitted, enlarged or reduced, which do not represent the dimensions of the actual product.

[0037] Embodiment 1

[0038] The present invention provides a technical solution. Referring to Figure 1 a connecting device for concrete precast components of urban infrastructure shown in the figure, which includes a rotating rod 1, two sets of assembling mechanisms 2 and several precast slabs 3. The rotating rod 1 is used to fixedly connect the two sets of assembling mechanisms 2. The two sets of assembling mechanisms 2 are symmetrically arranged at both ends of the several precast slabs 3. The rotating rod 1 is arranged between the two sets of assembling mechanisms 2 and fixedly connected to both sets of assembling mechanisms 2. Each set of assembling mechanism 2 includes a rotating assembly 20 and two sets of pressing assemblies 21. The rotating assembly 20 is fixedly arranged at one end of the rotating rod 1. The two sets of pressing assemblies 21 are symmetrically and fixedly arranged on both sides of the rotating assembly 20, and the two sets of pressing assemblies 21 are respectively arranged corresponding to two adjacent precast slabs 3.

[0039] Referring to Figure 2 two grooves 30 are symmetrically arranged at both ends of each precast slab 3 shown in the figure. The grooves 30 are provided to provide a plugging space for the corresponding pressing blocks 212. Two avoiding grooves 31 are symmetrically arranged in the middle of each groove 30. The avoiding grooves 31 are provided to connect the corresponding one-way blocks 220, so that the pressing blocks 212 and the precast slabs 3 are locked in the vertical direction. A rectangular male tenon 32 is fixedly arranged on one side of each precast slab 3. A first chamfer 320 is arranged on the outer edge of the rectangular male tenon 32. A rectangular female tenon 33 is fixedly arranged on the other side of the precast slab 3. A second chamfer 330 is arranged on the outer edge of the rectangular female tenon 33. The rectangular male tenon 32 of the precast slab 3 cooperates with the rectangular female tenon 33 of another precast slab 3. The first chamfer 320 and the second chamfer 330 are provided to correct the deviation when the two precast slabs 3 are spliced.

[0040] Referring to Figures 3 to 5The shown rotating assembly 20 consists of an adjusting handle 201, a mounting cover 202, a rotating shaft 200, a worm gear 203, a worm 204, and a bidirectional threaded rod 205. The mounting cover 202 provides a limited rotating carrier for the worm gear 203 and the worm 204. The bidirectional threaded rod 205 is rotatably arranged at one side of the bottom of the mounting cover 202 and passes through the mounting cover 202. The worm gear 203 is fixedly arranged on the bidirectional threaded rod 205, and the worm gear 203 is located inside the mounting cover 202. The rotating shaft 200 is rotatably arranged at one side of the mounting cover 202 and passes through the mounting cover 202. The worm 204 is fixedly arranged on the rotating shaft 200, and the worm 204 is located inside the mounting cover 202 and is meshed with the worm gear 203. The sliding sleeve 210, the limiting block 211, and the pressing block 212 in each pressing assembly 21. The sliding sleeve 210 provides a limited sliding carrier for the pressing block 212. The limiting block 211 provides a limited rotating carrier for the pressing block 212. One end of the sliding sleeve 210 is fixedly arranged at one side of the mounting cover 202, and a limiting sliding groove 2100 is arranged at the bottom of the sliding sleeve 210. The limiting sliding groove 2100 provides a sliding space for the pressing block 212. The top of the pressing block 212 is slidably arranged in the limiting sliding groove 2100, and the pressing block 212 is threadedly connected with one end of the bidirectional threaded rod 205. The limiting block 211 is fixedly arranged at the other end of the sliding sleeve 210. The bidirectional threaded rod 205 is rotatably arranged on the limiting block 211. When manually rotating the adjusting handle 201 to drive the rotating shaft 200 to rotate, the rotating shaft 200 drives the worm 204 and the worm gear 203 to rotate. The worm gear 203 drives the bidirectional threaded rod 205 to rotate. Thus, the bidirectional threaded rod 205 cooperates with the limiting sliding groove 2100 to drive the two pressing blocks 212 to move towards each other. Thus, the two pressing blocks 212 join the two precast slabs 3. At the same time, the rotating shaft 200 also drives the rotating rod 1 and the connecting shaft 410 to rotate. Thus, the connecting shaft 410 drives the adjusting mechanism 4 to rotate and drives another connecting shaft 410 to rotate, achieving the purpose of synchronous rotation.

[0041] In the present invention, two mounting grooves 2120 are symmetrically arranged on both sides of the bottom of the briquette 212. The mounting grooves 2120 provide a fixed mounting carrier for two groups of clamping components 22. A clamping component 22 is arranged in each mounting groove 2120. Each group of clamping components 22 includes a one-way block 220 and two return springs 221. The two return springs 221 are symmetrically and fixedly arranged inside the corresponding mounting groove 2120. The one-way block 220 is arranged in a right trapezoid shape, and the one-way block 220 is fixedly connected to one end of each of the two return springs 221. The one-way block 220 is arranged in contact with the corresponding avoidance groove 31. When the bottoms of the two briquettes 212 are respectively inserted into the insertion grooves 30 at one end of the corresponding two precast slabs 3, during the downward movement of the briquette 212, the one-way blocks 220 on both sides of the briquette 212 are located in the corresponding mounting grooves 2120 and compress the return springs 221. As the briquette 212 moves downward, when the one-way block 220 is on the horizontal line of the avoidance groove 31, the return spring 221 resets and pops out one end of the one-way block 220 to abut against the top of the avoidance groove 31 of the column 4121, thereby locking the briquette 212 and the precast slab 3 in the vertical direction. The two one-way blocks 220 are arranged in contact with the corresponding two avoidance grooves 31, which can prevent the two briquettes 212 from sliding out from the tops of the corresponding two insertion grooves 30 when the two precast slabs 3 are joined together.

[0042] Embodiment 2

[0043] Refer to Figures 6 to 9The shown device is composed of a rotating rod 1 connecting two sets of assembling mechanisms 2 to achieve the splicing of precast slabs 3. In this solution, an adjusting mechanism 4 is arranged in the middle of the rotating rod 1. The adjusting mechanism 4 is composed of a telescopic sleeve 40 and two sets of telescopic components 41. The two sets of telescopic components 41 are symmetrically arranged at both ends of the telescopic sleeve 40. A telescopic cavity 400 is arranged inside the telescopic sleeve 40. The telescopic cavity 400 provides a sliding space for a connecting shaft 410 and a limiting disc 411. A limiting groove 401 is arranged on the inner wall of the telescopic cavity 400. The limiting groove 401 plays a limiting role on the connecting shaft 410. And inner rings 4000 are symmetrically and fixedly arranged at both ends of the telescopic cavity 400. The inner rings 4000 play a limiting role on the limiting disc 411 to prevent the connecting shaft 410 from directly sliding out of the telescopic cavity 400. The telescopic component 41 includes a connecting shaft 410 and a limiting disc 411. One end of the connecting shaft 410 is fixedly connected to the end of the rotating rod 1, and the other end of the connecting shaft 410 is arranged inside the telescopic cavity 400. The limiting disc 411 is fixedly arranged at the other end of the connecting shaft 410, and the outer edge of the limiting disc 411 is slidably arranged on the inner wall of the telescopic cavity 400. The limiting disc 411 abuts against the corresponding inner ring 4000. A number of adjusting grooves 402 are evenly arranged in a straight line at the top of the telescopic sleeve 40. The adjusting grooves 402 provide a limiting space for a resisting column 4121 to ensure the locking of the device in the horizontal direction. A convex column 4100 is fixedly arranged on the side of the connecting shaft 410. The convex column 4100 is in limiting sliding fit with the limiting groove 401, so as to ensure the limiting sliding fit between the connecting shaft 410 and the telescopic cavity 400. The convex column 4100 is slidably connected to the corresponding limiting groove 401.

[0044] In the present invention, on both sides of the outer edge of the control groove 4101 on the connecting shaft 410, two limiting strips 4102 are symmetrically and fixedly arranged. The control groove 4101 provides a fixed installation carrier for the pressing column 412, and the two limiting strips 4102 provide a limiting carrier for the pressing-down column 4120 and the abutting column 4121, preventing the pressing column 412 from falling off the top of the control groove 4101. A pressing column 412 is arranged in the control groove 4101. One end of the pressing column 412 is fixedly provided with a pressing-down column 4120, and the other end of the pressing column 412 is fixedly provided with an abutting column 4121. The pressing-down column 4120 and the abutting column 4121 are both slidably arranged in the control groove 4101, and the pressing-down column 4120 and the abutting column 4121 are both in contact with the two limiting strips 4102. At the bottom of the abutting column 4121, two telescopic springs 4122 are symmetrically arranged. The two telescopic springs 4122 play a role in compressing adjustment and reset locking for the pressing column 412. The two telescopic springs 4122 are both welded to the bottom inner wall of the control groove 4101. When manually pressing the pressing-down column 4120, the pressing-down column 4120 drives the pressing column 412 to move into the control groove 4101, so that the abutting column 4121 moves into the control groove 4101, causing the abutting column 4121 to compress the two telescopic springs 4122, and thus the abutting column 4121 disengages from the corresponding adjustment groove 402 on the telescopic sleeve 40. Then, manually pull the connecting shaft 410 and the rotating rod 1 to slide in the telescopic cavity 400, thereby adjusting the distance between the two assembling mechanisms 2.

[0045] Working principle:

[0046] Manually hold down the pressing column 4120, and the pressing column 4120 drives the abutting column 4121 to move into the control groove 4101, thereby abutting and compressing the two telescopic springs 4122, so that the abutting column 4121 disengages from the corresponding adjustment groove 402 on the telescopic sleeve 40. Then manually pull the connecting shaft 410 and the rotating rod 1 to slide in the telescopic cavity 400, thereby adjusting the distance between the two assembling mechanisms 2. After the adjustment is completed, release the pressing column 4120, so that the two telescopic springs 4122 drive the pressing column 412 to reset, so that the abutting column 4121 abuts against the corresponding adjustment groove 402 again, thereby locking the connecting shaft 410 and the telescopic sleeve 40. Then insert the bottom ends of the two pressing blocks 212 into the corresponding insertion grooves 30 at one end of the two precast slabs 3 respectively. During the downward movement of the pressing block 212, the one-way blocks 220 on both sides of the pressing block 212 are located in the corresponding installation grooves 2120 and compress the return springs 221. As the pressing block 212 moves downward, when the one-way block 220 is on the horizontal line of the avoidance groove 31, the return spring 221 resets and pops out one end of the one-way block 220 to abut against the top of the avoidance groove 31 of the abutting column 4121, thereby locking the pressing block 212 and the precast slab 3 in the vertical direction. Manually rotate the adjusting handle 201, the adjusting handle 201 drives the rotating shaft 200 to rotate, the rotating shaft 200 drives the worm 204 to rotate, the worm 204 drives the worm wheel 203 to rotate, and the worm wheel 203 drives the double-threaded screw rod 205 to rotate. Thus, the double-threaded screw rod 205 cooperates with the limit sliding groove 2100 to drive the two pressing blocks 212 to move towards each other, so that the two pressing blocks 212 join the two precast slabs 3. The rectangular male tenon 32 of the precast slab 3 cooperates with the rectangular female tenon 33 of the other precast slab 3. At the same time, the rotating shaft 200 also drives the rotating rod 1 and the connecting shaft 410 to rotate, so that the connecting shaft 410 drives the adjusting mechanism 4 to rotate and drives the other connecting shaft 410 to rotate, achieving the purpose of synchronous rotation.

Claims

1. A connecting device for precast concrete components of urban infrastructure, comprising a rotating rod (1), two sets of assembly mechanisms (2) and a number of precast slabs (3), characterized in that, Two sets of the assembly mechanisms (2) are symmetrically arranged at both ends of a plurality of precast slabs (3). The rotating rod (1) is arranged between the two sets of assembly mechanisms (2) and fixedly connected to both sets of assembly mechanisms (2). Each set of the assembly mechanisms (2) includes a rotating component (20) and two sets of pressing components (21). The rotating component (20) is fixedly arranged at one end of the rotating rod (1). The two sets of pressing components (21) are symmetrically and fixedly arranged on both sides of the rotating component (20), and the two sets of pressing components (21) are respectively arranged corresponding to two adjacent precast slabs (3). The rotating component (20) includes a rotating shaft (200), an adjusting handle (201), a mounting cover (202), a worm gear (203), a worm (204) and a bidirectional threaded rod (205). The bidirectional threaded rod (205) is rotatably arranged at one side of the bottom of the mounting cover (202) and passes through the mounting cover (202). The worm gear (203) is fixedly arranged on the bidirectional threaded rod (205), and the worm gear (203) is located inside the mounting cover (202). The rotating shaft (200) is rotatably arranged at one side of the mounting cover (202) and passes through the mounting cover (202). The worm (204) is fixedly arranged on the rotating shaft (200), and the worm (204) is located inside the mounting cover (202) and meshed with the worm gear (203). Each set of the pressing components (21) includes a sliding sleeve (210), a limiting block (211) and a pressing block (212). One end of the sliding sleeve (210) is fixedly arranged at one side of the mounting cover (202), and a limiting chute (2100) is arranged at the bottom of the sliding sleeve (210). The top of the pressing block (212) is slidably arranged in the limiting chute (2100), and the pressing block (212) is threadedly connected to one end of the bidirectional threaded rod (205). The limiting block (211) is fixedly arranged at the other end of the sliding sleeve (210). The bidirectional threaded rod (205) is rotatably arranged on the limiting block (211).

2. The connecting device for precast concrete components of urban infrastructure according to claim 1, characterized in that, On one side of both ends of each precast slab (3), two embedding grooves (30) are symmetrically arranged. In the middle of each embedding groove (30), two avoiding grooves (31) are symmetrically arranged. On one side of each precast slab (3), a rectangular male tenon (32) is fixedly arranged. A first chamfer (320) is arranged on the outer edge of the rectangular male tenon (32). On the other side of the precast slab (3), a rectangular female tenon (33) is fixedly arranged. A second chamfer (330) is arranged on the outer edge of the rectangular female tenon (33).

3. The connecting device for concrete precast components of urban infrastructure according to claim 2, characterized in that, On both sides of the bottom of the pressing block (212), two mounting grooves (2120) are symmetrically arranged. In each mounting groove (2120), a clamping component (22) is arranged. Each set of the clamping components (22) includes a one-way block (220) and two return springs (221). The two return springs (221) are symmetrically and fixedly arranged inside the corresponding mounting groove (2120). The one-way block (220) is in a right trapezoid shape, and the one-way block (220) is fixedly connected to one end of the two return springs (221). The one-way block (220) is in contact with the corresponding avoiding groove (31).

4. The connecting device for concrete precast components of urban infrastructure according to claim 1, characterized in that, The middle part of the rotating rod (1) is provided with an adjusting mechanism (4). The adjusting mechanism (4) includes a telescopic sleeve (40) and two sets of telescopic components (41). The two sets of telescopic components (41) are symmetrically arranged at both ends of the telescopic sleeve (40). A telescopic cavity (400) is arranged inside the telescopic sleeve (40). A limiting groove (401) is arranged on the inner wall of the telescopic cavity (400). Inner rings (4000) are symmetrically and fixedly arranged at both ends of the telescopic cavity (400). A number of adjusting grooves (402) are evenly arranged in a straight line at the top of the telescopic sleeve (40).

5. The connecting device for precast concrete components of urban infrastructure according to claim 4, characterized in that, Each set of the telescopic components (41) includes a connecting shaft (410) and a limiting disc (411). One end of the connecting shaft (410) is fixedly connected to the end of the rotating rod (1), and the other end of the connecting shaft (410) is arranged inside the telescopic cavity (400). The limiting disc (411) is fixedly arranged at the other end of the connecting shaft (410). The outer edge of the limiting disc (411) is slidably arranged on the inner wall of the telescopic cavity (400). The limiting disc (411) is in contact with the corresponding inner ring (4000).

6. The connecting device for precast concrete components of urban infrastructure according to claim 5, characterized in that, A convex column (4100) is fixedly arranged on the side of the connecting shaft (410). The convex column (4100) is slidably connected to the corresponding limiting groove (401). A control groove (4101) is arranged beside the convex column (4100). Two limiting strips (4102) are symmetrically and fixedly arranged on both sides of the outer edge of the control groove (4101).

7. The connecting device for precast concrete components of urban infrastructure according to claim 6, characterized in that, A pressing column (412) is arranged inside the control groove (4101). One end of the pressing column (412) is fixedly provided with a downward pressing column (4120), and the other end of the pressing column (412) is fixedly provided with a resisting column (4121). The downward pressing column (4120) and the resisting column (4121) are both slidably arranged in the control groove (4101). The downward pressing column (4120) and the resisting column (4121) are both in contact with the two limiting strips (4102). Two telescopic springs (4122) are symmetrically arranged at the bottom of the resisting column (4121). The two telescopic springs (4122) are both welded to the bottom of the inner wall of the control groove (4101).

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