Detonating cord connecting device

Abstract

The utility model provides a detonating cord connecting device which comprises a detonating cord body and a connecting shell. Connecting holes into which the two axial ends of the detonating cord body can be respectively inserted are symmetrically formed in the connecting shell, and the detonating cord body is in contact with the inner walls of the connecting holes; a group of clamping blocks used for fixing the detonating cord body are symmetrically arranged at the connecting hole, arc-shaped grooves are formed in the opposite sides of the clamping blocks, and the clamping blocks are located on the two circumferential sides of the detonating cord body; and four movable grooves are formed in the connecting shell. The mounting rod is driven by the guide block to transversely move in the movable groove, so that the mounting rod can drive the clamping block to move towards the position close to the detonating cord body until the arc-shaped groove formed in the opposite side of the clamping block is in contact with the outer wall of the detonating cord body, the clamping effect on the detonating cord body is achieved, then the transverse plate is positioned, and the detonating cord body is clamped. And the connection of the detonating cord body is further stabilized, so that the firmness of the connection of the detonating cord body can be improved.

Description

Technical Field

[0001] This utility model relates to the field of blasting engineering technology, specifically to a detonating cord connection device. Background Technology

[0002] Detonating cord is a cord-like detonating device made with RDX (cyclotrimethylenetrinitramine) as the core explosive and a multi-layered cotton and linen fiber woven layer and a moisture-proof paper composite coating. Its typical outer diameter is 5.8-6.2 mm, and its detonation velocity is not less than 6000 m / s. According to the GB / T9786-2015 standard "Industrial Detonating Cords," detonating cords must possess reliable detonation transmission performance and tensile strength (≥294 N). In tunnel excavation, open-pit bench blasting, and other engineering projects, it is often necessary to form a complex initiation network through multi-node connections, with the amount of detonating cord used on a single blasting face reaching 200-500 meters.

[0003] Detonating cord, as a stable and reliable detonation transmission device, is widely used in tunnel and open-pit blasting. At the work site, workers need to connect several detonating cords, usually by binding with hemp rope, knotting, or wrapping with adhesive tape. Since the connection of detonating cords has length and angle requirements, the success of the connection is directly related to the worker's care, patience, and skill. While the traditional hemp rope binding method is simple, the tensile strength of the cotton binding material is only 49-78N, making it susceptible to connection failure due to rock friction during the loading and packing process. When knotting or wrapping with adhesive tape, the radius of curvature of the bent part of the detonating cord is usually less than 30mm, causing a sudden change in the direction of the detonation wave propagation, leading to detonation failure.

[0004] Furthermore, in actual operation, due to the poor working environment and complex and cumbersome operation at the construction site, it is easy to have an unstable connection when connecting the detonating cord. This often leads to interruption of detonation and misfire of explosives during blasting due to substandard connection quality of the detonating cord, thus affecting the blasting effect and creating great safety hazards and secondary operation burden. Utility Model Content

[0005] The purpose of this invention is to provide a detonating cord connection device to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A detonating cord connection device includes a detonating cord body and a connecting shell. The connecting shell has symmetrically arranged connecting holes for inserting the axial ends of the detonating cord body, with the detonating cord body contacting the inner walls of the connecting holes. A set of clamping blocks for fixing the detonating cord body is symmetrically arranged at each connecting hole. Each clamping block has an arc-shaped groove on opposite sides and is located on both circumferential sides of the detonating cord body. The connecting shell has four movable slots, with adjacent slots being symmetrical. A horizontal plate is slidably arranged within each movable slot. An opening is formed on the horizontal plate, and a guide block is slidably connected to the inner wall of the opening. One end of each guide block is fixedly connected to an installation rod, and the clamping block is fixedly connected to the end of the installation rod. One inner wall of each movable slot is inclined, and a guide groove is formed on the inclined inner wall of the movable slot. The guide block is slidably connected to the inner wall of the guide groove.

[0008] Furthermore, the inner wall of the movable groove is provided with symmetrically arranged sliding grooves, and the two sides of the horizontal plate are fixedly connected with symmetrically arranged sliders, which are slidably connected to the inner wall of the sliding groove.

[0009] Furthermore, four connecting rods are fixedly connected to the outer wall of the connecting shell, and each connecting rod has a limit block fixedly connected to its end, with adjacent limit blocks being symmetrical to each other.

[0010] Furthermore, the limiting block is provided with an installation groove, and a wedge-shaped positioning block is slidably connected to the inner wall of the installation groove, and adjacent positioning blocks are symmetrical to each other.

[0011] Furthermore, a positioning groove is provided on the horizontal plate, and the positioning block is adapted to the positioning groove.

[0012] Furthermore, a compression spring is installed in the mounting groove, and one axial end of the compression spring is fixedly connected to the positioning block.

[0013] As can be seen from the above technical solution, when connecting the detonating cord, the detonating cord is inserted into the connecting hole, so that the detonating cord contacts the inner wall of the connecting hole. After the detonating cord is inserted, the horizontal plate is pulled to move outward of the movable groove. The horizontal plate drives the guide block to move, so that the guide block slides in the inclined guide groove. Since the guide block is slidably set on the horizontal plate, the guide block can drive the installation rod to move laterally in the movable groove, so that the installation rod can drive the clamping block to move closer to the detonating cord until the arc-shaped groove on the opposite side of the clamping block contacts the outer wall of the detonating cord, realizing the clamping effect on the detonating cord. Then the horizontal plate is positioned, so that the connection of the detonating cord is further stabilized, thereby improving the firmness of the connection of the detonating cord and avoiding the phenomenon of detonation interruption and explosive misfire caused by unqualified connection quality of the detonating cord during the blasting process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the detonating cord connecting device of this utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting shell of the detonating cord connecting device of this utility model;

[0016] Figure 3 This is a side view cross-sectional diagram of the connecting shell of the detonating cord connecting device of this utility model;

[0017] Figure 4 This is a schematic diagram of the movable groove structure of the detonating cord connecting device of this utility model;

[0018] Figure 5 This is a schematic diagram showing the connection of the horizontal plate, mounting rod, and clamping block of the detonating cord connecting device of this utility model;

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the limiting block of the detonating cord connecting device of this utility model.

[0020] In the diagram: 1. Detonating cord body; 2. Connecting shell; 3. Connecting hole; 4. Movable groove; 5. Horizontal plate; 6. Mounting rod; 7. Clamping block; 8. Arc groove; 9. Sliding groove; 10. Sliding block; 11. Guide groove; 12. Guide block; 13. Connecting rod; 14. Limiting block; 15. Positioning groove; 16. Mounting groove; 17. Positioning block; 18. Compression spring. Detailed Implementation

[0021] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1The detonating cord connection device shown includes a detonating cord body 1 and a connecting shell 2. The connecting shell 2 is characterized by symmetrically provided connecting holes 3 allowing the axial ends of the detonating cord body 1 to be inserted, with the detonating cord body 1 contacting the inner walls of the connecting holes 3. A set of clamping blocks 7 for fixing the detonating cord body 1 are symmetrically arranged at each connecting hole 3. Each clamping block 7 has an arc-shaped groove 8 on opposite sides, and the clamping blocks 7 are located on both circumferential sides of the detonating cord body 1. The connecting shell 2 has four movable grooves 4, with adjacent movable grooves 4 being symmetrical. A horizontal plate 5 is slidably arranged within each movable groove 4. Symmetrically arranged sliding grooves 9 are formed on the inner walls of each movable groove 4. Symmetrically arranged sliders 10 are fixedly connected to both sides of the horizontal plate 5, and the sliders 10 are slidably connected to the inner walls of the sliding grooves 9. An opening is provided on the horizontal plate 5, and a guide block 12 is slidably connected to the inner wall of the opening. An installation rod 6 is fixedly connected to one end of each guide block 12. The clamping block 7 is fixedly connected to the end of the mounting rod 6. The inner wall of the movable groove 4 is inclined on one side, and a guide groove 11 is opened on the inclined inner wall of the movable groove 4. The guide block 12 is slidably connected to the inner wall of the guide groove 11. In specific use, the two axial ends of the detonating cord 1 are respectively inserted into the connecting hole 3, so that the detonating cord 1 contacts the inner wall of the connecting hole 3. After the detonating cord 1 is inserted, the horizontal plate 5 is pulled to move outward of the movable groove 4. The horizontal plate 5 drives the guide block 12 to move, so that the guide block 12 slides in the inclined guide groove 11. Since the guide block 12 is slidably set on the horizontal plate 5, the guide block 12 can drive the mounting rod 6 to move laterally in the movable groove 4, so that the mounting rod 6 can drive the clamping block 7 to move closer to the detonating cord 1, until the arc-shaped groove 8 opened on the opposite side of the clamping block 7 contacts the outer wall of the detonating cord 1, thereby achieving the clamping effect on the detonating cord 1.

[0023] In this preferred embodiment, four connecting rods 13 are fixedly connected to the outer wall of the connecting housing 2. Each end of the connecting rod 13 is fixedly connected to a limiting block 14, and adjacent limiting blocks 14 are symmetrical to each other. An installation groove 16 is provided on the limiting block 14, and a wedge-shaped positioning block 17 is slidably connected to the inner wall of the installation groove 16, and adjacent positioning blocks 17 are symmetrical to each other. A positioning groove 15 is provided on the horizontal plate 5, and the positioning block 17 is adapted to the positioning groove 15. A compression spring 18 is installed in the installation groove 16, and one axial end of the compression spring 18 is fixedly connected to the positioning block 17. When the horizontal plate 5 is pulled to move outward from the movable groove 4, the end of the horizontal plate 5 presses against the positioning block 17 until the arc groove 8 contacts the outer wall of the detonating cord body 1. At this time, the positioning groove 15 opened on the horizontal plate 5 moves to the side of the positioning block 17. Under the action of the compression spring 18, the positioning block 17 can be pushed into the positioning groove 15 to achieve the positioning function of the horizontal plate 5. This further stabilizes the connection of the detonating cord body 1 and avoids the phenomenon of detonation interruption and explosive misfire caused by the unqualified connection quality of the detonating cord body 1 during the blasting process.

[0024] The implementation principle of the detonating cord connection device in this embodiment is as follows: In specific use, the detonating cord body 1 is inserted into the connection hole 3, so that the detonating cord body 1 contacts the inner wall of the connection hole 3. After the detonating cord body 1 is inserted, the horizontal plate 5 is pulled to move outward of the movable groove 4. The horizontal plate 5 drives the guide block 12 to move, so that the guide block 12 slides in the inclined guide groove 11. Since the guide block 12 is slidably set on the horizontal plate 5, the guide block 12 can drive the mounting rod 6 to move laterally in the movable groove 4, so that the mounting rod 6 can drive the clamping block 7 to move laterally. The horizontal plate 5 moves closer to the detonating cord body 1 until the arc-shaped groove 8 on the opposite side of the clamping block 7 contacts the outer wall of the detonating cord body 1, thus clamping the detonating cord body 1. At the same time, the horizontal plate 5 presses against the positioning block 17 as it moves. When the arc-shaped groove 8 contacts the outer wall of the detonating cord body 1, the positioning groove 15 on the horizontal plate 5 moves to the side of the positioning block 17. At this time, under the action of the compression spring 18, the positioning block 17 can be pushed into the positioning groove 15, thus positioning the horizontal plate 5 and further stabilizing the connection of the detonating cord body 1.

[0025] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A detonating cord connecting device comprising a detonating cord body (1) and a connecting housing (2); characterized in that, The connecting shell (2) is symmetrically provided with connecting holes (3) that allow the two ends of the detonating cord body (1) to be inserted into it respectively. The detonating cord body (1) is in contact with the inner wall of the connecting hole (3). A set of clamping blocks (7) for fixing the detonating cord body (1) is symmetrically provided at the connecting hole (3). The clamping blocks (7) are provided with arc-shaped grooves (8) on opposite sides. The clamping blocks (7) are located on both sides of the circumference of the detonating cord body (1). The connecting shell (2) is provided with four movable grooves (4), and the adjacent movable grooves are arranged in a manner that allows for the insertion of the detonating cord body (1) into the grooves. The grooves (4) are symmetrical to each other. A horizontal plate (5) is slidably arranged in the movable groove (4). An opening is provided on the horizontal plate (5), and a guide block (12) is slidably connected to the inner wall of the opening. An installation rod (6) is fixedly connected to one end of the guide block (12). The clamping block (7) is fixedly connected to the end of the installation rod (6). The inner wall of one side of the movable groove (4) is inclined, and a guide groove (11) is provided on the inclined inner wall of the movable groove (4). The guide block (12) is slidably connected to the inner wall of the guide groove (11).

2. A detonating cord connecting device according to claim 1, characterised in that The inner wall of the movable groove (4) is provided with symmetrically arranged sliding grooves (9), and the two sides of the horizontal plate (5) are fixedly connected with symmetrically arranged sliders (10), and the sliders (10) are slidably connected to the inner wall of the sliding groove (9).

3. A detonating cord connecting device according to claim 1, characterised in that Four connecting rods (13) are fixedly connected to the outer wall of the connecting shell (2). Each end of the connecting rod (13) is fixedly connected to a limiting block (14), and adjacent limiting blocks (14) are symmetrical to each other.

4. A detonating cord connecting device according to claim 3, characterised in that The limiting block (14) is provided with an installation groove (16), and the inner wall of the installation groove (16) is slidably connected with a wedge-shaped positioning block (17), and the adjacent positioning blocks (17) are symmetrical to each other.

5. A detonating cord connecting device according to claim 4, characterised in that The horizontal plate (5) is provided with a positioning groove (15), and the positioning block (17) is adapted to the positioning groove (15).

6. A detonating cord connecting device according to claim 4, characterised in that A compression spring (18) is installed in the mounting groove (16), and one axial end of the compression spring (18) is fixedly connected to the positioning block (17).

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