Triggering type unlocking connecting piece capable of being used for bridge expansion joint

Abstract

The utility model discloses a trigger type unlocking connecting piece capable of being used for a bridge expansion joint. The connecting piece comprises a cap body, a connecting rod, a cup-shaped hole, a cup body, a rigid ball body, a first spring, an explosion device, a trigger switch and an electronic fuse. The core characteristic is that when a trigger signal is received, the electronic fuse activates the explosion device and quickly pushes the cup body, so that the connecting rod is unlocked and the two connected components are released, the two components can be easily separated under strong impact, and the two components can be stably connected when the trigger signal is not received.

Description

Technical Field

[0001] The utility model relates to a trigger - type unlocking connecting piece that can be used for bridge expansion joints, belonging to the technical field of connecting pieces. Background Technique

[0002] The bridge deck expansion joint is a very important component in the bridge structure, mainly used to compensate and adjust the expansion and contraction deformation of the bridge caused by temperature changes, traffic loads or other external forces. This device can effectively prevent the bridge from being damaged due to unfree expansion and contraction, ensuring the normal use of the bridge and driving safety.

[0003] In the bridge deck expansion joint, a modular expansion joint is often used, also known as a modular expansion joint, which is a type of expansion joint used on bridges to meet large displacement requirements. This expansion joint consists of side beam steel, anchor plate, anchor bars, middle beam steel, rubber strips, support beams and displacement boxes. The side beam steel is usually located on the outermost side of the expansion joint, playing a role in fixing the entire expansion joint structure. They are usually firmly connected to the main structure of the bridge through the anchor plate and anchor bars; the anchor plate, as a key component connecting the side beam steel and the bridge structure, is usually made of a strong steel plate. The anchor plate is fixed to the bridge concrete or other structural components through the anchor bars, thereby keeping the position of the expansion joint stable; the anchor bars firmly fix the anchor plate and the main structure of the bridge together. These steel bars penetrate into the bridge concrete to ensure that the side beam steel can withstand the dynamic loads from vehicle operation without displacement; the middle beam steel is located in the central area of the expansion joint and is usually parallel to the side beam steel; the rubber strips are installed between the middle beam steel and the side beam steel, or between the middle beam steel and the middle beam steel, used to seal the expansion joint to prevent water and impurities from entering the inside of the expansion joint. These rubber strips are pressed between the beam steels and fixed by clamping or gluing. The displacement box is a key structural component, which includes two symmetric and relatively one - side - open boxes. The displacement box is fixedly connected to the two side beam steels and usually contains a sliding or rolling mechanism, allowing the middle beam steel to move longitudinally along the support beam while the side beam steel remains fixed. This design allows the expansion joint to expand and contract adaptively under the influence of temperature changes and traffic loads. The support beam is perpendicular to the middle beam steel and is movably arranged in the displacement box. The support beam is slidably connected to the lower surface of the middle beam steel, supporting the entire expansion joint structure and playing a role in dispersing the load.

[0004] However, the existing modular expansion joints have the problem that when encountering strong external impacts such as earthquakes, the expansion and contraction of the bridge deck may exceed the expansion and contraction range of the expansion joint, causing the support beam to directly collide rigidly with the bridge structure, resulting in the fracture of the bridge body.

[0005] To solve the above problems, the applicant has proposed a bridge deck expansion joint structure, such as Figure 1As shown in the figure, two wedge structures are utilized. One wedge structure provides a sliding surface. When the other wedge structure is joined to the sliding surface, the cross-sections of the two wedge structures form a parallelogram. Since the sliding surface is not at a right angle, the wedge structure on the sliding surface will move along the sliding surface. Once a strong vibration such as an earthquake occurs, the expansion joint will not cause a rigid collision with the bridge body, resulting in the fracture of the bridge body, thereby enhancing the seismic performance of the bridge body.

[0006] However Figure 1 There is a problem with the structure in [reference]. If ordinary bolts are used to connect the two wedge structures, in the event of a strong vibration such as an earthquake, the bolts will impede the relative movement of the two wedge structures, driving the lower wedge structure to squeeze the bridge body structure and damaging the bridge body structure. If the two wedge structures are connected by using easily breakable or directly through a pin, the result is that the connection between the two wedge structures is not firm and is easily affected by external forces, causing the two wedge structures to separate from each other. Therefore, how to use a connection structure to connect two components, while ensuring the firm connection of the two components, and how to make the two components connected by the connected structure easily separable when needed, are problems that the existing technology urgently needs to solve. Summary of the Invention

[0007] The technical problem to be solved by the present utility model is to provide a trigger-type unlocking connecting piece that can be used for bridge expansion joints to overcome the deficiencies of the prior art.

[0008] The technical solution of the present utility model is: A trigger-type unlocking connecting piece that can be used for bridge expansion joints, characterized in that it includes a cap body, a connecting rod, a connecting through hole, a cup-shaped hole, a cup body, a first spring, a rigid sphere, an explosive device, a trigger switch, and an electronic fuse;

[0009] The cup-shaped hole is composed of a cylindrical hole and a frustum-shaped hole. The bottom surface with a larger radius of the frustum-shaped hole is the same as the radius of the end of the cylindrical hole. The bottom surface with a larger radius of the frustum-shaped hole is connected to the end of the cylindrical hole. The smaller section of the frustum faces upward;

[0010] The connecting through hole is coaxial with the cup-shaped hole and is connected to the cup-shaped hole;

[0011] The cup body includes a cylindrical part and a frustum part. The cylindrical part is a cavity structure with an open end face. The frustum part is a cavity structure. The bottom surface with a larger radius of the frustum part is fixedly connected to the non-open end face of the cylindrical part. The bottom surface with a larger radius of the frustum part is the same as the radius of the non-open end face of the cylindrical part. The side surface of the frustum part is provided with circular holes evenly distributed around the central axis of the frustum. The number of circular holes is the same as the number of rigid spheres. The diameter of the circular holes is smaller than the diameter of the rigid spheres. The diameter of the smaller end face of the frustum part is smaller than the diameter of the smaller end face of the cup-shaped hole. The diameter of the larger end face of the frustum part is smaller than the diameter of the larger end face of the cup-shaped hole. The height of the frustum part is matched with the diameter of the rigid sphere;

[0012] The rigid spheres include several, and are arranged in the cavity of the frustum part of the cup body. The diameter of the rigid spheres is such that several rigid spheres are connected end to end to form a ring. When the rigid spheres are connected end to end to form a ring, the distance from the center of each rigid sphere to the central axis of the frustum part is less than the sum of the radius of the rigid sphere and the radius of the connecting through hole. The sum of the diameter of the rigid sphere and the radius of the connecting through hole is less than the radius of the larger end face of the frustum part, and the sum of the diameter of the rigid sphere and the radius of the connecting through hole is greater than the radius of the smaller end face of the frustum part;

[0013] The first spring is arranged between the cylindrical part of the cup body and the end face of the cup-shaped hole far from the frustum hole;

[0014] One end of the connecting rod is fixedly connected to the cap body, the diameter of the cap body is greater than the diameter of the connecting rod, the connecting rod is inserted into the cup-shaped hole through the through hole, the length of the connecting rod is greater than the sum of the length of the communication hole and the height of the frustum hole, and the length of the connecting rod is less than the sum of the length of the communication hole and the length of the cup-shaped hole;

[0015] The explosive device is arranged on the end face with a smaller diameter of the frustum hole of the cup-shaped hole, and the explosive device surrounds the connecting rod for one week;

[0016] The trigger switch is electrically connected to the electronic fuse through a wire;

[0017] The electronic fuse is connected to the explosive device.

[0018] Further, the end of the connecting rod away from the cap body is pointed.

[0019] Further, a second spring is further included, and the second spring is arranged between the bottom surface of the cup-shaped hole far from the frustum hole and the end of the connecting rod.

[0020] The beneficial effects of the utility model are: compared with the prior art,

[0021] 1) In the present utility model, the radius of the frustum-shaped hole of the cup-shaped hole gradually decreases in the direction of the connecting rod being pulled out. When the connecting rod is to be pulled out of the connecting through-hole, the rigid sphere will move in the pulling-out direction under the drive of the friction force of the connecting rod. The decreasing radius of the cup-shaped hole makes the pressure between the rigid sphere and the connecting rod greater, and the friction force is also greater, thus locking the connecting rod from being pulled out, and playing the role of connecting the structure where the cup-shaped hole is located and the structure blocked by the cap body. However, if the trigger switch receives a trigger signal, the trigger switch will connect the electronic fuse. When the electronic fuse is connected, the explosive device is detonated. In an extremely short time, the explosive device pushes the cup body towards the direction of the first spring. Since the cup body leaves the cup-shaped hole, the cup-shaped hole cannot cooperate with the rigid sphere to lock the connecting rod, and the connecting rod is unlocked at this time. At the same time, under the push of the second spring, the structure blocked by the cap body is pushed out of the cup-shaped hole. Since the connecting rod loses the locking of the sphere, it can be easily pulled out from the connecting through-hole; it realizes that on the premise of ensuring the reliable connection of the two components, the two connected components are easily separated under the trigger of the trigger switch;

[0022] 2) In the present utility model, the end of the connecting rod away from the cap body is pointed, so that the connecting rod can be easily inserted into the cup body, realizing the locking of the first wedge-shaped structure and the second wedge-shaped structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural view of the background art of the present utility model;

[0024] Figure 2 is a schematic structural view of the present utility model;

[0025] Figure 3 is Figure 2 a partial view at A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific embodiments.

[0027] Embodiment 1: Refer to Figures 2 to 3 , a trigger-type unlocking connecting piece that can be used for bridge expansion joints, which is characterized in that it includes a cap body 8-4, a connecting rod 8-3, a connecting through-hole 8-6, a cup-shaped hole 8-5, a cup body 8-12, a first spring 8-7, a rigid sphere 8-8, an explosive device 8-9, a trigger switch 8-10, and an electronic fuse 8-11;

[0028] The cup-shaped hole 8-5 is composed of a cylindrical hole and a frustum-shaped hole. The bottom surface with a larger radius of the frustum-shaped hole is the same as the radius of the end of the cylindrical hole. The bottom surface with a larger radius of the frustum-shaped hole is communicated with the end of the cylindrical hole, and the section with a smaller radius of the frustum faces upward;

[0029] The connecting through-hole 8-6 is coaxial with the cup-shaped hole 8-5, and the connecting through-hole 8-6 communicates with the cup-shaped hole 8-5;

[0030] The cup body 8-12 includes a cylindrical part and a frustum part. The cylindrical part is a cavity structure with an open end face, and the frustum part is a cavity structure. The bottom surface with a larger radius of the frustum part is fixedly connected to the non-open end face of the cylindrical part. The bottom surface with a larger radius of the frustum part has the same radius as the non-open end face of the cylindrical part. The side surface of the frustum part is provided with circular holes 8-6-1 evenly distributed around the central axis of the frustum. The number of circular holes 8-6-1 is the same as the number of rigid spheres 8-8. The diameter of the circular holes 8-6-1 is smaller than the diameter of the rigid spheres 8-8. The diameter of the smaller end face of the frustum part is smaller than the diameter of the smaller end face of the frustum hole. The diameter of the smaller end face of the frustum part is smaller than the diameter of the smaller end face of the frustum hole. The diameter of the larger end face of the frustum part is smaller than the diameter of the larger end face of the frustum hole. The height of the frustum part is matched with the diameter of the rigid spheres 8-8;

[0031] There are several rigid spheres 8-8. The rigid spheres 8-8 are arranged in the cavity of the frustum part of the cup body 8-12. The diameter of the rigid spheres 8-8 is such that several rigid spheres 8-8 are connected end to end to form a ring. When the rigid spheres 8-8 are connected end to end to form a ring, the distance from the center of each rigid sphere 8-8 to the central axis of the frustum part is smaller than the sum of the radius of the rigid sphere 8-8 and the radius of the connecting through-hole 8-6. The sum of the diameter of the rigid sphere 8-8 and the radius of the connecting through-hole 8-6 is smaller than the radius of the larger end face of the frustum part. The sum of the diameter of the rigid sphere 8-8 and the radius of the connecting through-hole 8-6 is larger than the radius of the smaller end face of the frustum part;

[0032] The first spring 8-7 is arranged between the cylindrical part of the cup body 8-12 and the end face of the cup-shaped hole 8-5 far from the frustum hole;

[0033] One end of the connecting rod 8-3 is fixedly connected to the cap body 8-4. The diameter of the cap body 8-4 is larger than the diameter of the connecting rod 8-3. The connecting rod 8-3 is inserted into the cup-shaped hole 8-5 through the through-hole. The length of the connecting rod 8-3 is greater than the sum of the length of the communication hole and the height of the frustum hole. The length of the connecting rod 8-3 is less than the sum of the length of the communication hole and the length of the cup-shaped hole 8-5;

[0034] The explosive device 8-9 is arranged on the end face with a smaller diameter of the frustum hole of the cup-shaped hole 8-5, and the explosive device 8-9 surrounds the connecting rod 8-3 for one week;

[0035] The trigger switch 8-10 is electrically connected to the electronic fuse 8-11 through a wire;

[0036] The electronic fuse 8-11 is connected to the explosive device 8-9.

[0037] Further, the end of the connecting rod 8-3 away from the cap body 8-4 is pointed.

[0038] Furthermore, it further includes a second spring 8-13, and the second spring 8-13 is arranged between the bottom surface of the cup-shaped hole 8-5 far from the frustum-shaped hole and the end of the connecting rod 8-3.

[0039] Working principle: In the present utility model, the radius of the frustum-shaped hole of the cup-shaped hole 8-5 gradually decreases in the direction of pulling out the connecting rod 8-3. When the connecting rod 8-3 is to be pulled out of the connecting through-hole 8-6, the rigid sphere 8-8 will move in the pulling-out direction driven by the frictional force of the connecting rod 8-3. The decreasing radius of the cup-shaped hole 8-5 makes the pressure between the rigid sphere 8-8 and the connecting rod 8-3 greater, and the frictional force is also greater, thus locking the connecting rod 8-3 from being pulled out, playing a role in connecting the structure where the cup-shaped hole is located and the structure blocked by the cap body. However, if the trigger switch 8-10 receives a trigger signal, the trigger switch 8-10 will connect the electronic fuse 8-11. When the electronic fuse 8-11 is connected, it detonates the explosive device 8-9. In an extremely short time, the explosive device 8-9 pushes the cup body 8-12 in the direction of the first spring 8-7. Since the cup body 8-12 leaves the cup-shaped hole 8-5, the cup-shaped hole 8-5 cannot cooperate with the rigid sphere 8-8 to lock the connecting rod 8-3, and the connecting rod 8-3 is unlocked at this time. Meanwhile, under the push of the second spring 8-13, the structure blocked by the cap body is pushed out of the cup-shaped hole 8-5. Since the connecting rod 8-3 loses the locking of the sphere, it can be easily pulled out from the connecting through-hole 8-6; it realizes that on the premise of ensuring the reliable connection of the two components, the two connected components are easily separated under the trigger of the trigger switch.

[0040] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A trigger unlocking connector that can be used for bridge expansion joints, characterized in that: It comprises a cap body (8-4), a connecting rod (8-3), a connecting through hole (8-6), a cup-shaped hole (8-5), a cup body (8-12), a first spring (8-7), a rigid sphere (8-8), an explosive device (8-9), a trigger switch (8-10) and an electronic fuse (8-11); The cup-shaped hole (8-5) is composed of a cylindrical hole and a truncated cone hole, the bottom surface of the truncated cone hole with a larger radius has the same radius as the end of the cylindrical hole, the bottom surface of the truncated cone hole with a larger radius is connected to the end of the cylindrical hole, and the section with a smaller radius of the truncated cone faces upward; The connecting through hole (8-6) is coaxial with the cup-shaped hole (8-5), and the connecting through hole (8-6) is in communication with the cup-shaped hole (8-5); The cup body (8-12) comprises a cylindrical part and a truncated cone part, the cylindrical part is a cavity structure with an open end face, the truncated cone part is a cavity structure, the bottom face with a larger radius of the truncated cone part is fixedly connected to the closed end face of the cylindrical part, the bottom face with a larger radius of the truncated cone part has the same radius as the closed end face of the cylindrical part, the side face of the truncated cone part is provided with circular holes (8-6-1) evenly distributed around the central axis of the cone, the number of the circular holes (8-6-1) is the same as the number of the rigid sphere (8-8), the diameter of the circular hole (8-6-1) is smaller than the diameter of the rigid sphere (8-8), the smaller end face diameter of the truncated cone part is smaller than the smaller end face diameter of the truncated cone hole, the smaller end face diameter of the truncated cone part is smaller than the smaller end face diameter of the truncated cone hole, the larger end face diameter of the truncated cone part is smaller than the larger end face diameter of the truncated cone hole, and the height of the truncated cone part matches the diameter of the rigid sphere (8-8); The rigid spheres (8-8) include a plurality of rigid spheres (8-8), which are arranged in the cavity of the truncated cone portion of the cup body (8-12); the diameter of the rigid spheres (8-8) allows the plurality of rigid spheres (8-8) to be connected end to end to form a ring; when the rigid spheres (8-8) are connected end to end to form a ring, the distance from the center of each rigid sphere (8-8) to the central axis of the truncated cone portion is less than the sum of the radius of the rigid sphere (8-8) and the radius of the connecting through hole (8-6); the sum of the diameter of the rigid sphere (8-8) and the radius of the connecting through hole (8-6) is less than the larger end face radius of the truncated cone portion; and the sum of the diameter of the rigid sphere (8-8) and the radius of the connecting through hole (8-6) is greater than the smaller end face radius of the truncated cone portion. The first spring (8-7) is arranged between the cylindrical portion of the cup body (8-12) and the end surface of the cup-shaped hole (8-5) away from the truncated cone hole; One end of the connecting rod (8-3) is fixedly connected to the cap body (8-4); the diameter of the cap body (8-4) is larger than the diameter of the connecting rod (8-3); the connecting rod (8-3) is inserted into the cup-shaped hole (8-5) through the through hole; the length of the connecting rod (8-3) is larger than the sum of the length of the connecting hole and the height of the truncated cone hole; and the length of the connecting rod (8-3) is smaller than the sum of the length of the connecting hole and the length of the cup-shaped hole (8-5); The explosion device (8-9) is arranged on the end surface of the truncated cone hole with a smaller diameter of the cup-shaped hole (8-5), and the explosion device (8-9) surrounds the connecting rod (8-3); The trigger switch (8-10) is electrically connected to the electronic fuse (8-11) via a wire; The electronic fuse (8-11) is connected to the explosive device (8-9).

2. The trigger-type unlocking connector for bridge expansion joints according to claim 1, characterized in that: One end of the connecting rod (8-3) away from the cap body (8-4) is pointed.

3. The trigger-type unlocking connector for bridge expansion joints according to claim 1, characterized in that: It also includes a second spring (8-13), which is arranged between the bottom surface of the cup-shaped hole (8-5) away from the truncated cone hole and the end of the connecting rod (8-3).

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