Expansion joint connecting device

Abstract

The invention relates to the technical field of connecting devices, in particular to an expansion joint connecting device. In order to solve the problems that before rainwater is dried up, dust in air is mixed in the rainwater, slurry is easily formed and attached to the surface of a roof, corrosion of roof materials is possibly accelerated, and a smooth expansion joint connecting device is insufficient in sealing performance, the following technical scheme is provided: the expansion joint connecting device comprises mounting grooves formed in the tops of two groups of roof floor slabs; mounting plates are mounted in the mounting grooves, side plates are fixedly connected to the bottoms of the mounting plates, the side plates are mounted on the side faces of the roof floor slab, a pressing plate is arranged above the two mounting plates, and two rubber pads are mounted at the bottom of the pressing plate; the connecting mechanisms are arranged below the pressing plate and used for fixing the pressing plate to the side face of the side plate. The installation mode is simple, the sealing performance is extremely high, rainwater is effectively prevented from entering the connecting seam, meanwhile, rainwater cannot be reserved on the roof, and roof materials are prevented from being corroded.

Description

Technical Field

[0001] The present invention relates to the technical field of connection devices, and particularly to an expansion joint connection device. Background Art

[0002] In roof construction, expansion joint connection devices are usually used to handle problems of material expansion and contraction caused by temperature changes, building settlement, or other factors. These devices can effectively prevent cracks or other structural problems in roof materials due to temperature changes. Currently, in order to ensure good sealing and waterproof performance, the connection position of the expansion joint connection device protrudes from the roof surface, and rainwater is likely to remain in the position between two groups of expansion joints and is difficult to be discharged through the roof drainpipe in time. Before the rainwater dries up, dust in the air mixes in it, easily forming mud, adhering to the roof surface, and may accelerate the corrosion of roof materials. In order to prevent rainwater from remaining, a flat expansion joint connection device is used, but such a connection device has insufficient sealing performance. In view of this, the present invention proposes an expansion joint connection device. Summary of the Invention

[0003] The object of the present invention is to address the problems in the background art that dust in the air mixes in before the rainwater dries up, easily forming mud, adhering to the roof surface, and may accelerate the corrosion of roof materials, and that the flat expansion joint connection device has insufficient sealing performance, and to propose an expansion joint connection device.

[0004] The technical solution of the present invention: An expansion joint connection device includes installation grooves opened at the tops of two groups of roof floor slabs. An installation plate is installed in the installation grooves. A side plate is fixedly connected to the bottom of the installation plate, and the side plate is installed on the side of the roof floor slab. Above the two installation plates, there is a pressing plate, and two rubber pads are installed at the bottom of the pressing plate; A plurality of connection mechanisms are arranged below the pressing plate, and the connection mechanisms are used to fix the pressing plate to the side of the side plate; An adaptation component is arranged at the bottom of the pressing plate, and the adaptation component is installed on the top of the connection mechanism. The adaptation component fixes the connection mechanism to the bottom of the pressing plate and is used to prevent the influence of thermal expansion and contraction on the structure; Elastic mechanisms are installed on both sides of the connection mechanism, and the elastic mechanisms are used to release elastic force to drive the pressing plate to press down the rubber pad to improve the sealing performance; A trigger mechanism is arranged on the connection mechanism, and the trigger mechanism is used to control the elastic mechanism to release elastic force when the pressing plate approaches the installation plate.

[0005] Optionally, the connection mechanism includes an insertion block arranged below the pressing plate. A sleeve is slidably connected to the insertion block. An installation frame is installed on one side of the sleeve. The installation frame is arranged in a "U" shape. A first sliding rod is slidably connected to the installation frame. One end of the first sliding rod close to the sleeve is fixedly connected to a clamping block. The clamping block is slidably connected to one side of the sleeve. One end of the clamping block close to the insertion block is inclined. A clamping groove corresponding to the clamping block is opened on the side of the insertion block.

[0006] Optionally, a first spring is mounted on the outer ring of the first sliding rod, the first spring is arranged between the installation frame and the clamping block, and one end of the first sliding rod away from the clamping block is fixedly connected to a limiting disk.

[0007] Optionally, the adaptation component includes a first sliding block fixedly connected to both sides of the plug block, a first limit block is provided on the side of the first sliding block away from the plug block, the first limit block is an L-shaped structure, the first sliding block is slidably connected to the first limit block, the first limit block is fixedly connected to the bottom of the pressure plate, and the two ends of the two groups of the first limit blocks are respectively fixedly connected with a connecting plate.

[0008] Optionally, the elastic mechanism includes two groups of fixed plates fixedly connected to the side surfaces of the side plates, the two groups of fixed plates are symmetrically arranged on both sides of the sleeve, a second sliding rod is slidably connected to the fixed plates, both ends of the second sliding rod are respectively fixedly connected to synchronous plates, and the four groups of synchronous plates are all fixedly connected to the side surfaces of the sleeve.

[0009] Optionally, the outer ring of the second sliding rod is sleeved with a second spring, and the second spring is arranged below the fixing plate.

[0010] Optionally, the elastic mechanism also includes a second slider fixedly connected to both sides of the sleeve, a second limit block is provided on the side of the second slider away from the sleeve, the second limit block is an L-shaped structure, the second slider is slidably connected to the second limit block, and the second limit block is fixedly connected to the side of the side plate.

[0011] Optionally, the trigger mechanism includes a base plate arranged in the sleeve, the bottom of the base plate is fixedly connected to a connecting rod, the end of the connecting rod away from the base plate is installed with a transition plate, the top of the transition plate is fixedly connected to a moving rod, the top of the moving rod is rotatably connected to two groups of rotating rods, the two groups of rotating rods are symmetrically arranged, the end of the rotating rod away from the moving rod is rotatably connected to a latch, the latch is slidably connected to a fixed sleeve, and the fixed sleeve is fixedly connected to the side of the sleeve away from the side plate.

[0012] Optionally, the latch is also slidably connected to an insert sleeve, and the insert sleeve is fixedly connected to the fixing plate.

[0013] Optionally, two groups of limit seats are slidably connected to the moving rod, and the limit seats are fixedly connected to the side of the sleeve away from the side plate. A spring plate is arranged between the two groups of limit seats, and the spring plate is fixedly connected to the limit seats. A third spring is arranged between the two groups of limit seats and is sleeved on the outer ring of the moving rod. The third spring is arranged below the spring plate.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: The present invention provides a connection mechanism so that when the pressing plate is moved downward for installation, the insert block can be locked by cooperating with the card block and the card slot, thereby completing the installation and fixation of the pressing plate. At the same time, the adaptable component is used to ensure that the pressing plate is always in the two sets of installation plates when the roof floor expands and contracts, so as to perform sealing and waterproofing, and prevent the structure from being damaged due to thermal expansion and contraction. Furthermore, by setting the elastic mechanism, after the plug block is inserted into the sleeve, the plug pin is pulled out of the sleeve, so that the second spring releases the elastic force to drive the sleeve to move downward, thereby pressing the pressure plate downward to squeeze the mounting plate, thereby ensuring good sealing and effectively preventing rainwater from entering. The upper surface of the device is flat, thereby preventing rainwater from being retained between two adjacent sets of connecting devices, thereby ensuring a long service life of the roof material. In summary, the present invention has a simple installation method and extremely high sealing performance, which effectively prevents rainwater from entering the connection seams. At the same time, the roof will not retain rainwater, thereby preventing corrosion of the roof material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of an expansion joint connection device is provided; Figure 2 It is a schematic diagram after the connecting mechanism is connected; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of; Figure 4 It is a schematic diagram of the connecting mechanism before connection; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure.

[0016] Reference numerals: 1. Roof slab; 11. Installation groove; 2. Installation plate; 21. Side plate; 3. Pressure plate; 4. Rubber pad; 5. Connecting mechanism; 51. Insert block; 52. Sleeve; 53. Mounting frame; 54. First slide bar; 55. Block; 56. Slot; 57. First spring; 58. Limiting plate; 6. Adaptive component; 61. First slider; 62. First limit block; 63. Connecting plate; 7. Elastic mechanism; 71. Fixed plate; 72. Second slide bar; 73. Synchronous plate; 74. Second spring; 75. Second slide block; 76. Second limit block; 8. Trigger mechanism; 801. Bottom plate; 802. Connecting rod; 803. Transition plate; 804. Moving rod; 805. Rotating rod; 806. Latch; 807. Fixing sleeve; 808. Insertion tube; 809. Limiting seat; 810. Spring plate; 811. Third spring. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0019] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example like Figure 1 As shown, the expansion joint connection device proposed by the present invention includes a mounting groove 11 opened on the top of two groups of roof slabs 1, so that the top of the pressure plate 3 is in the same plane as the roof. A mounting plate 2 is installed in the mounting groove 11. The mounting plate 2 is made of stainless steel and is almost not corroded in the environment of the roof, and has a long service life. The bottom of the mounting plate 2 is fixedly connected to a side plate 21, and the side plate 21 is installed on the side of the roof slab 1. A pressure plate 3 is arranged above the two groups of mounting plates 2, and two groups of rubber pads 4 are installed at the bottom of the pressure plate 3 to improve the sealing performance and prevent rainwater leakage.

[0023] For further information, see Figure 2-5, the above-mentioned connecting device includes a plurality of connecting mechanisms 5 arranged below the pressing plate 3, and the connecting mechanism 5 is used to fix the pressing plate 3 on the side surface of the side plate 21. The connecting mechanism 5 includes an inserting block 51 arranged below the pressing plate 3, and a sleeve 52 is slidably connected to the inserting block 51. When the pressing plate 3 is installed, the inserting block 51 moves downward and is inserted into the sleeve 52. An installation frame 53 is installed on one side of the sleeve 52, and the installation frame 53 is fixed to the side surface of the sleeve 52. The installation frame 53 is arranged in a "U" shape, and a first sliding rod 54 is slidably connected to the installation frame 53. One end of the first sliding rod 54 close to the sleeve 52 is fixedly connected with a clamping block 55, and the clamping block 55 is slidably connected to one side of the sleeve 52, and the movement of the clamping block 55 is stable. One end of the clamping block 55 close to the inserting block 51 is inclined, so that when the inserting block 51 is inserted into the sleeve 52, the clamping block 55 can be extruded to move towards the side close to the installation frame 53 through the inclined surface of the clamping block 55. A clamping groove 56 corresponding to the clamping block 55 is formed on the side surface of the inserting block 51, so that when the inserting block 51 moves until the clamping groove 56 is located at the position of the clamping block 55, the clamping block 55 is limited to prevent the inserting block 51 from moving upward. A first spring 57 is sleeved outside the first sliding rod 54, and the first spring 57 is arranged between the installation frame 53 and the clamping block 55. The first spring 57 is used to be extruded when the clamping block 55 moves towards the installation frame 53, and then releases the elastic force to make the clamping block 55 reset. One end of the first sliding rod 54 far from the clamping block 55 is fixedly connected with a limiting disk 58, and the limiting disk 58 is used for limiting to prevent the clamping block 55 from extending into the sleeve 52 too far and preventing the inserting block 51 from being unable to extrude the clamping block 55 to move.

[0024] Furthermore, the above-mentioned connecting device includes an adaptation component 6 arranged at the bottom of the pressing plate 3. The adaptation component 6 is installed on the top of the connecting mechanism 5. The adaptation component 6 fixes the connecting mechanism 5 at the bottom of the pressing plate 3 and is used to prevent the influence of thermal expansion and contraction on the structure. The adaptation component 6 includes first sliding blocks 61 fixedly connected to both sides of the inserting block 51, and the first sliding blocks 61 move synchronously with the inserting block 51. A first limiting block 62 is arranged on the side of the first sliding block 61 far from the inserting block 51. The first limiting block 62 is an L-shaped structure, and the first sliding block 61 is slidably connected to the first limiting block 62. The first limiting block 62 is fixedly connected to the bottom of the pressing plate 3. Through the arrangement of the first sliding block 61 and the first limiting block 62, the inserting block 51 is slidably connected to the bottom of the pressing plate 3. Thus, when the roof floor slab 1 expands and contracts thermally, the inserting block 51 moves synchronously, but it can be ensured that the inserting block 51 and the pressing plate 3 are always slidably connected together. The first sliding block 61 and the first limiting block 62 are in interference fit, that is, there is a certain frictional force when the first sliding block 61 slides, which is used to adjust the position of the inserting block 51 to align it with the sleeve 52 when installing the pressing plate 3, and at the same time, this frictional force will not affect the movement caused by thermal expansion and contraction. Both ends of the two groups of first limiting blocks 62 are respectively fixedly connected with a connecting plate 63 to prevent the first sliding block 61 from sliding out of the position of the first limiting block 62.

[0025] Specifically, the above-mentioned connecting device includes an elastic mechanism 7 installed on both sides of the connecting mechanism 5, and the elastic mechanism 7 is used to release elastic force to drive the pressure plate 3 to press down the rubber pad 4 to improve the sealing performance. The elastic mechanism 7 includes two groups of fixed plates 71 fixedly connected to the side of the side plate 21, and the position of the fixed plates 71 is fixed. The two groups of fixed plates 71 are symmetrically arranged on both sides of the sleeve 52, and the second sliding rod 72 is slidably connected in the fixed plate 71. The two ends of the second sliding rod 72 are respectively fixedly connected to the synchronous plates 73. The four groups of synchronous plates 73 are all fixedly connected to the side of the sleeve 52. The sleeve 52 is slidably connected between the two groups of fixed plates 71 through the second sliding rod 72 and the synchronous plates 73. The outer ring of the second slide bar 72 is provided with a second spring 74, which is arranged below the fixed plate 71. The second spring 74 is used to release elastic force to drive the sleeve 52 to move downward as a whole, so that the sleeve 52 drives the plug block 51 to move downward synchronously under the limiting action of the clamping block 55, so that the pressure plate 3 moves downward synchronously, and the pressure plate 3 presses the rubber pad 4 to obtain a higher sealing performance. The elastic mechanism 7 also includes a second slider 75 fixedly connected to both sides of the sleeve 52, and the second slider 75 moves synchronously with the sleeve 52. A second limiting block 76 is arranged on the side of the second slider 75 away from the sleeve 52, and the second limiting block 76 is an L-shaped structure. The second slider 75 is slidably connected to the second limiting block 76, and the second limiting block 76 is fixedly connected to the side of the side plate 21. The position of the second limiting block 76 is fixed, so that the sleeve 52 moves smoothly through the limiting action of the second slider 75 and the second limiting block 76 when moving.

[0026] Finally, the above-mentioned connecting device includes a trigger mechanism 8 arranged on the connecting mechanism 5, and the trigger mechanism 8 is used to control the elastic mechanism 7 to release the elastic force when the pressure plate 3 approaches the mounting plate 2. The trigger mechanism 8 includes a bottom plate 801 arranged in the sleeve 52. When the plug block 51 slides into the sleeve 52, the bottom plate 801 is pressed down synchronously, and the bottom plate 801 moves downward synchronously. The bottom of the bottom plate 801 is fixedly connected with a connecting rod 802, and a transition plate 803 is installed at one end of the connecting rod 802 away from the bottom plate 801. The top of the transition plate 803 is fixedly connected with a moving rod 804. When the bottom plate 801 moves, the connecting rod 802 and the transition plate 803 drive the moving rod 804 to move synchronously. The top of the moving rod 804 is rotatably connected with two groups of rotating rods 805, and the two groups of rotating rods 805 are symmetrically arranged. When the moving rod 804 moves, it drives the two groups of rotating rods 805 to deflect synchronously. The end of the rotating rod 805 away from the moving rod 804 is rotatably connected to the latch 806, and the rotating rod 805 drives the latch 806 to move synchronously when it is deflected. A fixing sleeve 807 is slidably connected to the latch 806, and the fixing sleeve 807 is fixedly connected to the side of the sleeve 52 away from the side plate 21. The fixing sleeve 807 is used to limit the moving direction of the latch 806. The latch 806 is also slidably connected to the insertion sleeve 808, and the insertion sleeve 808 is fixedly connected to the fixed plate 71. When the latch 806 is inserted into the insertion sleeve 808, the sleeve 52 is fixed between the two sets of fixed plates 71 and cannot move. When the latch 806 is removed from the insertion sleeve 808, the sleeve 52 is no longer fixed between the two sets of fixed plates 71, so that the second spring 74 releases the elastic force to drive the sleeve 52 to move. Two groups of limiting seats 809 are slidably connected to the moving rod 804. The limiting seats 809 are fixedly connected to the side of the sleeve 52 away from the side plate 21, and are used to limit the moving rod 804. A spring plate 810 is arranged between the two groups of limiting seats 809. The spring plate 810 is fixedly connected to the limiting seats 809. A third spring 811 sleeved on the outer ring of the moving rod 804 is arranged between the two groups of limiting seats 809. The third spring 811 is arranged below the spring plate 810. The third spring 811 is used to release the elastic force, so that before the plug 51 enters the sleeve 52, the latch 806 is inserted into the plug sleeve 808.

[0027] In this embodiment, first, the installation groove 11 is excavated, and the installation plate 2 is installed in the installation groove 11, and the two sets of side plates 21 are fitted with the side of the roof floor 1, and the side plates 21 are fixed with bolts. Then, the position of the plug block 51 is moved, so that the plug block 51 slides at the bottom of the pressure plate 3 through the first slider 61 and the first limit block 62, so that the position of the plug block 51 is aligned with the sleeve 52. Then, the pressure plate 3 is installed on the installation plate 2 from top to bottom, so that the plug block 51 is inserted into the sleeve 52. The plug block 51 slides downward in the sleeve 52, and when the bottom of the plug block 51 contacts the clamping block 55, the clamping block 55 is squeezed to move away from the plug block 51, and the first spring 57 is squeezed. When the clamping slot 56 moves to the position of the clamping block 55, the first spring 57 releases the elastic force so that the clamping block 55 approaches the plug block 51 and is clamped in the position of the clamping slot 56.

[0028] At the same time, when the plug block 51 moves downward, it contacts the bottom plate 801 and drives the bottom plate 801 to move downward. The bottom plate 801 drives the moving rod 804 to move downward synchronously through the connecting rod 802 and the transition plate 803. At this time, the moving rod 804 moves downward and drives the two groups of latches 806 to move synchronously through the two groups of rotating rods 805. The two groups of latches 806 slide in the fixing sleeve 807 and approach each other until the latches 806 move out of the insert sleeve 808. At this time, the second spring 74 releases its elastic force, driving the second slide bar 72 and the synchronous plate 73 to move downward. At the same time, the sleeve 52 moves downward under the limiting action of the second slide block 75 and the second limiting block 76. At this time, under the limiting action of the clamping block 55, when the sleeve 52 moves downward, it will drive the plug block 51 to move downward synchronously. The plug block 51 drives the pressure plate 3 to move downward through the adapting component 6. At this time, the pressure plate 3 presses the rubber pad 4 downward to obtain extremely high sealing performance to prevent rainwater from entering.

[0029] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. An expansion joint connection device, characterized in that: Including: An installation groove (11) opened at the top of two groups of roof floor slabs (1), an installation plate (2) is installed in the installation groove (11), a side plate (21) is fixedly connected to the bottom of the installation plate (2), the side plate (21) is installed on the side of the roof floor slab (1), a pressing plate (3) is arranged above the two installation plates (2), and two rubber pads (4) are installed at the bottom of the pressing plate (3); A plurality of connecting mechanisms (5) arranged below the pressing plate (3), the connecting mechanisms (5) are used to fix the pressing plate (3) on the side of the side plate (21); An adaptation component (6) arranged at the bottom of the pressing plate (3), the adaptation component (6) is installed on the top of the connecting mechanism (5), the adaptation component (6) fixes the connecting mechanism (5) at the bottom of the pressing plate (3) and is used to prevent the influence of thermal expansion and contraction on the structure; Elastic mechanisms (7) installed on both sides of the connecting mechanism (5), the elastic mechanisms (7) are used to release elastic force to drive the pressing plate (3) to press down the rubber pad (4) to improve the sealing performance; A triggering mechanism (8) arranged on the connecting mechanism (5), the triggering mechanism (8) is used to control the elastic mechanism (7) to release elastic force when the pressing plate (3) approaches the installation plate (2).

2. An expansion joint connection device according to claim 1, characterized in that: The connecting mechanism (5) includes an insertion block (51) arranged below the pressing plate (3), a sleeve (52) is slidably connected to the insertion block (51), an installation frame (53) is installed on one side of the sleeve (52), the installation frame (53) is arranged in a "U" shape, a first sliding rod (54) is slidably connected to the installation frame (53), a clamping block (55) is fixedly connected to one end of the first sliding rod (54) close to the sleeve (52), the clamping block (55) is slidably connected to one side of the sleeve (52), one end of the clamping block (55) close to the insertion block (51) is inclined, and a clamping groove (56) corresponding to the clamping block (55) is opened on the side of the insertion block (51).

3. An expansion joint connection device according to claim 2, characterized in that: A first spring (57) is sleeved outside the first sliding rod (54), the first spring (57) is arranged between the installation frame (53) and the clamping block (55), and a limiting disc (58) is fixedly connected to the end of the first sliding rod (54) far from the clamping block (55).

4. An expansion joint connection device according to claim 3, characterized in that: The adaptation component (6) includes first sliders (61) fixedly connected to both sides of the insertion block (51), a first limiting block (62) is arranged on the side of the first slider (61) far from the insertion block (51), the first limiting block (62) is of an L-shaped structure, the first slider (61) is slidably connected to the first limiting block (62), the first limiting block (62) is fixedly connected to the bottom of the pressing plate (3), and connecting plates (63) are respectively and fixedly connected to both ends of the two first limiting blocks (62).

5. The expansion joint connection device according to claim 2, characterized in that: The elastic mechanism (7) comprises two groups of fixed plates (71) fixedly connected to the side of the side plate (21), the two groups of fixed plates (71) being symmetrically arranged on both sides of the sleeve (52), a second sliding rod (72) being slidably connected to the fixed plates (71), both ends of the second sliding rod (72) being fixedly connected to synchronous plates (73), and the four groups of synchronous plates (73) are all fixedly connected to the side of the sleeve (52).

6. An expansion joint connection device according to claim 5, characterized in that: The outer ring of the second sliding rod (72) is sleeved with a second spring (74), and the second spring (74) is arranged below the fixing plate (71).

7. An expansion joint connection device according to claim 6, characterized in that: The elastic mechanism (7) further comprises a second sliding block (75) fixedly connected to both sides of the sleeve (52); a second limit block (76) is provided on a side of the second sliding block (75) away from the sleeve (52); the second limit block (76) is an L-shaped structure; the second sliding block (75) is slidably connected to the second limit block (76); and the second limit block (76) is fixedly connected to a side surface of the side plate (21).

8. The expansion joint connection device according to claim 5, characterized in that: The trigger mechanism (8) comprises a bottom plate (801) arranged in the sleeve (52); a connecting rod (802) is fixedly connected to the bottom of the bottom plate (801); a transition plate (803) is installed at one end of the connecting rod (802) away from the bottom plate (801); a moving rod (804) is fixedly connected to the top of the transition plate (803); two groups of rotating rods (805) are rotatably connected to the top of the moving rod (804); the two groups of rotating rods (805) are symmetrically arranged; one end of the rotating rod (805) away from the moving rod (804) is rotatably connected to a latch (806); a fixing sleeve (807) is slidably connected to the latch (806); and the fixing sleeve (807) is fixedly connected to the side of the sleeve (52) away from the side plate (21).

9. An expansion joint connection device according to claim 8, characterized in that: The latch pin (806) is also slidably connected to an insert tube (808), and the insert tube (808) is fixedly connected to the fixing plate (71).

10. An expansion joint connection device according to claim 9, characterized in that: Two groups of limit seats (809) are slidably connected to the moving rod (804); the limit seats (809) are fixedly connected to the side of the sleeve (52) away from the side plate (21); a spring plate (810) is arranged between the two groups of limit seats (809); the spring plate (810) is fixedly connected to the limit seats (809); a third spring (811) sleeved on the outer ring of the moving rod (804) is arranged between the two groups of limit seats (809); the third spring (811) is arranged below the spring plate (810).

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