A foundation pit top protection device for blasting excavation protection

Abstract

This application relates to a pit top protection device for blasting excavation protection, comprising several connectable shock-absorbing modules and a slide rail for connecting the shock-absorbing modules. Each shock-absorbing module has a pulley on its outer side that mates with the slide rail and a locking member that connects to another shock-absorbing module. The slide rail includes several unit rails and several steering connectors. Adjacent unit rails can be locked together, and both ends of the steering connector can be locked together with the unit rails. The angle between the two ends of the steering connector is adjustable. This application has the advantages of adapting to various sizes, recyclable structures in many parts, and the ability to quickly eliminate impact and reduce vibration.

Description

Technical Field

[0001] This application relates to the technical field of blasting protection, and in particular to a pit top protection device for blasting excavation protection. Background Technology

[0002] An excavation pit is a pit dug at the designed foundation location according to the foundation elevation and plan dimensions. Excavation pit engineering mainly includes the design and construction of the excavation pit support system and earthwork excavation, and is a highly comprehensive and systematic project.

[0003] During deep foundation pit blasting, it is usually necessary to cover the main blast hole with sandbags, and cover all dangerous areas with straw bags and wire mesh. The detonation time must be strictly determined, and surrounding workers must be notified.

[0004] However, existing protective devices have poor adaptability and reusability during use. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a pit top protection device for blasting excavation protection.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A pit top protection device for blasting excavation protection includes several splicable shock-absorbing modules and a slide rail for connecting the shock-absorbing modules. Each shock-absorbing module has a pulley that cooperates with the slide rail and a locking member that connects to another shock-absorbing module on its outer side.

[0008] The slide rail includes several unit rails and several steering connectors. Two adjacent unit rails can be locked together. Both ends of the steering connector can be locked together with the unit rails. The angle between the two ends of the steering connector is adjustable.

[0009] In a further embodiment of the present invention, the shock absorption module includes two sets of side panels and a top plate located between the two sets of side panels. A structural shock absorption layer is provided between the two sets of outer panels. The structural shock absorption layer has a rotating shaft that is rotatably connected to the two outer panels. A first gear is concentrically connected to the rotating shaft, and a second gear that meshes with the first gear is eccentrically connected to the rotating shaft.

[0010] A further embodiment of the present invention includes a limiting component, the limiting component having a limiting strip fixedly connected to the top plate, the rotating shaft being rotatably connected to the limiting strip, the limiting strip having at least one limiting hole, and the second gear being connected to at least one limiting rod, the limiting rod being rotatably located in the limiting hole in a corresponding manner.

[0011] A further embodiment of the present invention, the eccentric direction of the second gear is consistent with the direction of cooperation between the limiting rod and the limiting hole.

[0012] A further embodiment of the present invention, the shock absorption module further includes a material shock absorption layer connected to the structural shock absorption layer.

[0013] A further embodiment of the present invention, a rigid protective layer is connected to the side of the material shock absorption layer away from the structural shock absorption layer.

[0014] A further embodiment of the present invention, the side of the rigid protective layer away from the material shock absorption layer has a replaceable insurance layer, the insurance layer is hollow inside, and there are several staggered fracture connecting rods inside.

[0015] A further embodiment of the present invention, the fracture connecting rods are arranged obliquely and alternately.

[0016] A further embodiment of the present invention, the fracture connecting rod includes an upper connecting rod, a middle connecting rod and a lower connecting rod, the upper connecting rod is connected to one inner wall of the insurance layer, the lower connecting rod is connected to the other inner wall of the insurance layer, and the upper connecting rod and the lower connecting rod are connected by the middle connecting rod.

[0017] A further embodiment of the present invention, two of the upper connecting rods are in a group, two of the lower connecting rods are in a group, and a group of upper connecting rods and a group of lower connecting rods are connected by one of the middle connecting rods to form a shape similar to "兴".

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. During the use of the protection device of the present application, the protection range can be determined according to the size of the foundation pit to be blasted. By splicing and locking the unit rails, and then splicing the shock absorption modules through the slide rails into the required size to form the protection device.

[0020] 2. During the blasting process, the shock wave generated by the explosion first reaches the insurance layer, and then the connection parts of the fracture connecting rods inside the insurance layer break, and the entire insurance layer collapses, absorbing a large amount of energy generated by the explosion. Then, the rigid protective layer serves as a protective layer to transfer the energy to the material shock absorption layer. After the material shock absorption layer buffers, the final energy is consumed by the structural shock absorption layer. The multi-level distribution is reasonable in shock absorption and has excellent protection effect;

[0021] 3. The safety layer and the rigid protective layer are connected by a snap-fit ​​mechanism, making it a detachable connection layer. During the explosion, the internal fracture linkage of the safety layer breaks, causing the entire safety layer to collapse and absorb a large amount of energy generated by the explosion. This protects the rigid protective layer, the material damping layer, and the structural damping layer. In other words, except for the safety layer, all other structures can be recycled.

[0022] 4. When vibration occurs, the limiting block and the limiting strip convert the vertical vibration into rotation through the second gear. Since the second gear and the first gear are not meshed synchronously, the energy consumption during transmission is much greater than that of synchronous rotation. The energy of the vibration can be quickly consumed into internal energy, thereby quickly eliminating the impact and reducing vibration. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly of one embodiment of the protective device of the present invention;

[0024] Figure 2 This is a schematic diagram showing the connection between the shock-absorbing module and the slide rail in one embodiment of the protective device of the present invention;

[0025] Figure 3 This is a schematic diagram of the shock absorption module of one embodiment of the protection device of the present invention;

[0026] Figure 4 This is a structural schematic diagram of the shock-absorbing layer of a protective device according to an embodiment of the present invention;

[0027] Figure 5 This is an exploded view of the structural damping layer of one embodiment of the protective device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the protective layer in one embodiment of the protective device of the present invention;

[0029] Figure 7 This is a schematic diagram of the protective layer of another embodiment of the protective device of the present invention.

[0030] In the picture,

[0031] 1. Vibration damping module; 11. Structural vibration damping layer; 111. Rotating shaft; 112. First gear; 113. Eccentric wheel; 114. Second gear; 115. Limiting strip; 1151. Limiting hole; 116. Limiting block; 1161. Limiting rod; 12. Material vibration damping layer; 13. Rigid protective layer; 14. Safety layer; 140. Fracture link; 141. Upper link; 142. Middle link; 143. Lower link;

[0032] 2. Slide rail; 21. Unit rail; 22. Side plate;

[0033] 3. Side panels;

[0034] 4. Top plate. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1 as well as Figure 2 The present application discloses a pit top protection device for blasting excavation protection, which includes several splicable shock-absorbing modules 1 and slide rails 2 for connecting the shock-absorbing modules 1. Each shock-absorbing module 1 has a pulley that cooperates with the slide rail 2 and a locking member that connects to another shock-absorbing module 1 on its outer side.

[0037] The slide rail 2 includes several unit rails 21 and several steering connectors. Two adjacent unit rails 21 can be locked together. Both ends of the steering connector can be locked together with the unit rails 21. The angle between the two ends of the steering connector is adjustable. The steering connector can be a universal joint or other structure or component that meets the connection requirements.

[0038] Specifically, each unit rail 21 has a bottom rail and a side plate 22, wherein the bottom rail is adapted to the pulley, and the side plate 22 serves as a protective and limiting component to protect and limit the bottom rail and pulley.

[0039] During use, the protection range is determined according to the size of the blasting pit. Then, the unit rails 21 are spliced ​​and locked together, and the shock absorption modules 1 are spliced ​​to the required size through the slide rails 2 to form a protection device.

[0040] The locking mechanism here can be flange locking, screw and nut locking, snap-locking, etc. Any method that meets the requirements for tightness can be used.

[0041] Regarding vibration damping module 1, please refer to... Figure 3 The damping module 1 includes two sets of side panels 3 and a top plate 4 located between the two sets of side panels 3. Between the two sets of outer panels, there are a structural damping layer 11, a material damping layer 12, a rigid protective layer 13, and an insurance layer 14 in sequence. The outer side of the side panel 3 has a flange for connecting to the ground, which can be used to connect to the ground.

[0042] Reference Figure 4 as well as Figure 5 The structural damping layer 11 has a rotating shaft 111 that is rotatably connected to the outer side plates on both sides. The two ends of the rotating shaft 111 are rotatably connected to the two side plates 22 through bearings. A first gear 112 is concentrically connected to the rotating shaft 111. An eccentric wheel 113 is fixedly connected to the rotating shaft 111. A second gear 114 that meshes with the first gear 112 is synchronously connected to the eccentric wheel 113. Due to the eccentric rotation, the second gear 114 and the first gear 112 are partially meshed during the meshing process.

[0043] Continue to refer to Figure 4 and Figure 5 , the structural damping layer 11 further includes a limiting component. The limiting component has a limiting strip 115. The limiting strip 115 is fixedly connected to the top plate 4. The rotating shaft 111 rotatably penetrates through the limiting strip 115. The limiting strip 115 is provided with at least one limiting hole 1151. In the illustrated embodiment, the limiting strip 115 is provided with two limiting holes 1151. The second gear 114 is fixedly connected with a limiting block 116. The limiting block 116 is fixedly connected to the top plate 4. The rotating shaft 111 rotatably penetrates through the limiting block 116. The limiting block 116 is fixedly connected with at least one limiting rod 1161. The number of the limiting rods 1161 is the same as the number of the limiting holes 1151 and the limiting rods 1161 are rotatably located in the limiting holes 1151 in a one-to-one correspondence.

[0044] It should be understood that the eccentric direction of the second gear 114 is the same as the direction of the cooperation between the limiting rod 1161 and the limiting hole 1151.

[0045] When encountering vibrations, the limiting block 116 and the limiting strip 115 change the vertical vibrations into rotations through the second gear 114. Since the second gear 114 and the first gear 112 are non-synchronously meshed, during the transmission process, the energy consumption is much greater than synchronous rotation, and the energy of the vibrations can be quickly consumed into internal energy, thereby achieving rapid elimination of impacts and reduction of vibrations.

[0046] Regarding the material damping layer 12, it can be selected as a damping material such as rubber, etc. The double damping is formed by the mutual assistance of the structural damping layer 11 and the material damping layer 12, so as to buffer the vibrations of the explosion.

[0047] On the side of the rigid protective layer 13 away from the material damping layer 12, there is a replaceable insurance layer 14. The insurance layer 14 is hollow inside, and there are several staggered fracture connecting rods 140 inside it.

[0048] Refer to Figure 6 , as an implementation manner of this protection device, the fracture connecting rods 140 are arranged obliquely and alternately, in a zigzag shape, and adjacent connecting rods are joined by bonding.

[0049] Refer to Figure 7 , as another implementation manner of this protection device, the fracture connecting rods 140 include an upper connecting rod 141, a middle connecting rod 142 and a lower connecting rod 143. The upper connecting rod 141 is connected to the inner wall of one side of the insurance layer 14. The lower connecting rod 143 is connected to the inner wall of the other side of the insurance layer 14. The upper connecting rod 141 and the lower connecting rod 143 are connected by the middle connecting rod 142. Two upper connecting rods 141 are a group, and two lower connecting rods 143 are a group. A group of upper connecting rods 141 and a group of lower connecting rods 143 are connected by a middle connecting rod 142 to form a shape similar to "xing", and adjacent connecting rods are joined by bonding.

[0050] The safety layer 14 is snap-fitted to the rigid protective layer 13, making it a detachable connection layer. During the explosion, the internal fracture link 140 of the safety layer 14 breaks, causing the entire safety layer 14 to collapse and absorb a large amount of energy generated by the explosion. This protects the rigid protective layer 13, the material damping layer 12, and the structural damping layer 11. In other words, except for the safety layer 14, all other structures can be recycled.

[0051] The implementation principle of this embodiment is as follows: During use, the protection range is determined according to the size of the blasting pit. Then, the unit rails 21 are spliced ​​and locked together, and the shock-absorbing modules 1 are spliced ​​to the required size through the slide rails 2 to form a protective device. During the blasting process, the shock wave generated by the explosion first reaches the safety layer 14. Then, the connection of the fracture link 140 inside the safety layer 14 breaks, and the entire safety layer 14 collapses, absorbing a large amount of energy generated by the explosion. Then, the rigid protective layer 13 acts as a protective layer, transferring the energy to the material shock-absorbing layer 12. After the material shock-absorbing layer 12 buffers the energy, the final energy is consumed by the structural shock-absorbing layer 11.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pit top protection device for protection during blasting excavation, characterized in that: It includes several splicing shock-absorbing modules (1) and slide rails (2) for connecting the shock-absorbing modules (1). Each shock-absorbing module (1) has a pulley cooperating with the slide rail (2) on the outer side and a locking member connected to another shock-absorbing module (1). The slide rail (2) includes several unit rails (21) and several steering connectors. Adjacent two unit rails (21) can be locked with each other. Both ends of the steering connector can be locked with the unit rail (21), and the angle between both ends of the steering connector is adjustable. The shock-absorbing module (1) includes two groups of side enclosing plates (3) and a top plate (4) located between the two groups of side enclosing plates (3). There is a structural shock-absorbing layer (11) between the two groups of side enclosing plates (3). The structural shock-absorbing layer (11) has a rotating shaft (111) rotatably connected to the two side enclosing plates (3). A first gear (112) is concentrically connected to the rotating shaft (111), and a second gear (114) meshing with the first gear (112) is eccentrically connected to the rotating shaft (111). The shock-absorbing module (1) further includes a material shock-absorbing layer (12) connected to the structural shock-absorbing layer (11). One side of the material shock-absorbing layer (12) away from the structural shock-absorbing layer (11) is connected with a hard protective layer (13). One side of the hard protective layer (13) away from the material shock-absorbing layer (12) has a replaceable insurance layer (14). The insurance layer (14) is hollow inside, and there are several staggered fracture connecting rods (140) inside it. It further includes a limiting component. The limiting component has a limiting strip (115). The limiting strip (115) is fixedly connected to the top plate (4). The rotating shaft (111) is rotatably connected to the limiting strip (115). At least one limiting hole (1151) is provided on the limiting strip (115). At least one limiting rod (1161) is connected to the second gear (114), and the limiting rod (1161) is rotatably located in the limiting hole (1151) correspondingly one by one. The eccentric direction of the second gear (114) is consistent with the direction of the cooperation between the limiting rod (1161) and the limiting hole (1151).

2. The pit top protection device for blasting excavation protection according to claim 1, characterized in that: The fracture connecting rods (140) are arranged obliquely and alternately.

3. A pit top protection device for blasting excavation protection according to claim 2, characterized in that: The fracture connecting rod (140) includes an upper connecting rod (141), a middle connecting rod (142) and a lower connecting rod (143). The upper connecting rod (141) is connected to the inner wall of one side of the insurance layer (14). The lower connecting rod (143) is connected to the inner wall of the other side of the insurance layer (14). The upper connecting rod (141) and the lower connecting rod (143) are connected by the middle connecting rod (142).

4. A pit top protection device for blasting excavation protection according to claim 3, characterized in that: Two upper connecting rods (141) are in a group, and two lower connecting rods (143) are in a group. One group of upper connecting rods (141) and one group of lower connecting rods (143) are connected by one middle connecting rod (142) to form a shape similar to "Xing".

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