Electronic detonator foot wire short circuit prevention structure

Abstract

The utility model discloses an electronic detonator foot line anti -short circuit structure, including detonator main part, waterproof shell and electronic foot line. Waterproof shell inside is equipped with two foot line sleeves and a connecting block with wire hole, and the positive and negative electrode electronic foot line is physically isolated in space, and the internal short circuit caused by the damage of insulating layer is effectively prevented. The waterproof shell end is fixed with the floating plate, and the sealing end cover is arranged on the floating plate through the quick -release locking mechanism, and the sealed cavity is formed, and the moisture invasion leading to the external short circuit is prevented. The quick -release mechanism includes the inclined surface positioning rod, compression spring and push -pull block, realizes the quick assembly and disassembly of sealing end cover. The utility model discloses through the dual design of physical isolation and sealed protection, has improved the use safety and the operation convenience of electronic detonator under the complex environment significantly, especially is applicable to underwater blasting and other severe working conditions.

Description

Technical Field

[0001] This utility model relates to the field of electronic detonator technology, specifically to a short-circuit protection structure for electronic detonator leads. Background Technology

[0002] Electronic detonators, also known as digital electronic detonators, are detonators that use electronic control modules to precisely control the detonation process. Compared to traditional electric detonators, they have higher timing accuracy, reliability, and safety, and have been widely used in blasting fields such as mining, civil engineering, and precision demolition.

[0003] The detonation of an electronic detonator relies on the wire connected to it, known as the electronic lead. A typical electronic lead contains two insulated wires (a positive lead and a negative lead), usually encased in a common insulating sheath. However, this structure reveals the following technical drawbacks in practical applications, particularly in complex and harsh engineering environments: Prone to internal short circuits: During transportation, installation, or use, the electronic leads may age and wear due to repeated bending, stretching, or external compression, leading to damage to the internal insulation layer. Once the exposed parts of the positive and negative leads come into direct contact, a short circuit will be formed. This short circuit may not only cause the detonator to detonate accidentally or malfunction, but also trigger a chain reaction in the detonation network, posing a serious threat to the safety of the entire blasting system.

[0004] Insufficient waterproofing: During underwater blasting or in humid, rainy, or snowy weather, moisture in the environment can easily seep in through the ports led out from the lead wires. Existing detonator structures often have relatively simple sealing measures at this point, and once moisture seeps in, it will still create a conductive path between the positive and negative lead wires, causing a short circuit and leading to detonator misfire, which seriously affects the reliability and effectiveness of blasting operations.

[0005] Therefore, there is an urgent need in the existing technology for a short-circuit protection structure for electronic detonator leads that can effectively isolate the positive and negative electronic leads, prevent them from contacting each other even when their insulation layer is damaged, and have good waterproof sealing performance, especially suitable for humid or underwater environments. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a short-circuit protection structure for electronic detonator leads, so as to effectively solve the problems of internal short circuits in the positive and negative leads caused by aging or damage of the electronic lead insulation layer, as well as external short circuits caused by water seepage in underwater or humid environments.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A short-circuit protection structure for electronic detonator leads includes a detonator body, a waterproof shell, and electronic leads. The electronic leads are electrically connected to the detonator body and extend to the inner side of the waterproof shell. The inner side of the waterproof shell is provided with two lead sleeves for separating conduction, and a connecting block located above the lead sleeves. The connecting block has two wire holes that correspond one-to-one with the lead sleeves and are coaxially arranged. The electronic leads include a positive electronic lead and a negative electronic lead, which are respectively inserted into different lead sleeves and wire holes.

[0008] Furthermore, a float plate is fixedly installed at the end of the waterproof shell, and a sealing end cap is detachably provided on the float plate; a connecting ring is fixed on the bottom inner side of the sealing end cap, and an installation hole is opened in the middle of the float plate for the connecting ring to be inserted and form a sealing fit.

[0009] Furthermore, the electronic lead wire extends through the wire hole to the inside of the sealing end cap.

[0010] Furthermore, a sealing ring is provided on the float plate, and the bottom outer wall of the sealing end cap is in close contact with the inner wall of the sealing ring.

[0011] Furthermore, the inner side of the mounting hole of the float plate is provided with symmetrically arranged movable grooves, and a positioning rod is slidably connected in the movable groove; the connecting ring is provided with a positioning hole adapted to the positioning rod; one end of the positioning rod is connected to the movable groove through an elastic reset mechanism, and the other end has an inclined surface, so that when the connecting ring is inserted into the mounting hole, the inclined surface can be squeezed and the positioning rod can be retracted, and when the positioning hole moves to the corresponding position, the positioning rod is locked into the positioning hole under the action of the elastic reset mechanism.

[0012] Furthermore, the elastic reset mechanism includes a compression spring; one end of the positioning rod is fixedly connected to a slide rod, the slide rod slides through the through hole in the side wall of the float plate, and a push-pull block is fixed at one end of the slide rod located on the outside of the float plate; the compression spring is sleeved on the slide rod, and its two ends abut against the inner wall of the movable groove and the end of the positioning rod, respectively.

[0013] Furthermore, the lead sleeves are symmetrically arranged on the inner side of the waterproof housing.

[0014] As can be seen from the above technical solutions, compared with the prior art, the beneficial effects of this utility model are: 1. This utility model completely isolates the positive and negative electronic leads in space through the synergistic effect of the lead sleeve and the wire hole on the connecting block. Even if the insulation layer of a single lead is partially damaged, its exposed conductors are confined within their respective insulation channels and cannot come into contact with each other, fundamentally preventing internal short circuits. 2. This utility model uses a sealing system consisting of a float plate, a sealing end cap, a connecting ring, and a sealing ring to seal the core connection section of the electronic lead wire within a dry cavity, effectively preventing moisture intrusion and avoiding external short circuits caused by humid environments or underwater operations. At the same time, the float plate design allows the electrical connection end to float near the water surface when the structure is used underwater, reducing the long-term effect of water pressure on the sealing system and further improving the reliability and safety of underwater explosion. 3. This utility model achieves one-button quick locking and unlocking of the sealed end cap through a quick-release locking mechanism consisting of a positioning rod, compression spring, slide rod, and push-pull block. While ensuring the reliability of the seal, it greatly facilitates the wiring operation before blasting and improves the work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the waterproof outer shell of this utility model; Figure 3 This is a schematic diagram of the connection structure between the float plate and the sealing end cap of this utility model; Figure 4 This is a partial enlarged view of the quick-release locking mechanism of this utility model.

[0016] In the diagram: 1. Detonator body; 2. Waterproof outer shell; 3. Float plate; 4. Sealing end cap; 5. Electronic lead wire; 6. Connecting block; 7. Lead wire sleeve; 8. Connecting ring; 9. Movable groove; 10. Positioning rod; 11. Sealing ring; 12. Wire hole; 13. Positioning hole; 14. Slide rod; 15. Compression spring; 16. Push-pull block. Detailed Implementation

[0017] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] like Figures 1 to 4 The illustrated short-circuit protection structure for the electronic detonator leads includes a detonator body 1, a waterproof outer shell 2, and electronic leads 5. The electronic leads 5 include a positive electronic lead and a negative electronic lead, and are electrically connected to the electronic control module inside the detonator body 1.

[0019] Example 1: Short-circuit protection structure To prevent direct contact and short circuits between the positive and negative lead wires due to aging or damage to the insulation layer, this preferred embodiment includes a physical isolation structure inside the waterproof housing 2. This structure mainly consists of two symmetrically arranged lead wire sleeves 7 and a connecting block 6 located above them. The connecting block 6 has two wire holes 12 that correspond one-to-one with and are coaxial with the lead wire sleeves 7.

[0020] During installation, the positive and negative electronic leads pass through different lead sleeves 7 and wire holes 12, respectively. This design constitutes a double isolation barrier: First layer of isolation (leader sleeve 7): The leader sleeve 7 is made of insulating material and physically separates the two leaders in the lower space of the waterproof housing 2. Even if the insulation of one leader is damaged in this section, its exposed conductor is confined within its respective sleeve and cannot come into contact with the other leader.

[0021] Second layer of isolation (connector block 6 and wire hole 12): Connector block 6 further secures the two separated leads in the independent wire hole 12, ensuring that they always maintain a safe distance at the lead-out end.

[0022] This structure fundamentally eliminates the short circuit between positive and negative poles caused by internal insulation damage in the lead wires, significantly improving the inherent safety of electronic detonators in complex wiring and usage environments.

[0023] Example 2: Waterproof and Floating Structure To address waterproofing issues in underwater or humid environments, this preferred embodiment includes a float plate 3 fixedly installed at the end of the waterproof outer shell 2. The float plate 3 is made of a low-density material, ensuring that this end always maintains upward buoyancy in water. A sealing end cap 4 is mounted on the float plate 3 via a quick-release locking mechanism, with a connecting ring 8 fixed to its inner bottom side. The connecting ring 8 is inserted into the mounting hole in the middle of the float plate 3, and a first waterproof seal is formed through the tight fit between the sealing ring 11 on the float plate 3 and the outer wall of the bottom end of the sealing end cap 4.

[0024] The electronic lead wire 5 extends from the wire hole 12 of the connecting block 6 to the inner space of the sealing end cap 4. Therefore, the core connecting section of the entire electronic lead wire is completely sealed in a dry cavity composed of the waterproof shell 2, the float plate 3, and the sealing end cap 4.

[0025] When conducting underwater blasting operations, the detonator body 1 is submerged in the water. Under the buoyancy of the float plate 3, the end of the waterproof outer shell 2 (i.e., the portion including the electronic lead wire outlet) will float above the water surface or at least remain at the water's surface, greatly reducing the long-term effects of water pressure on the sealing structure. Simultaneously, the structure of the sealing end cap 4 and the connecting ring 8 ensures that even with wave splashing, water cannot penetrate the cavity.

[0026] This design effectively isolates the electrical connection of the electronic lead wire from the water, completely avoiding short circuits caused by water infiltration and ensuring the reliability of underwater blasting.

[0027] Example 3: Quick-release locking mechanism To facilitate the quick removal of the sealing end cap 4 for connection to the detonator before detonation, this preferred embodiment includes a convenient locking and unlocking mechanism. Specifically, symmetrical movable grooves 9 are provided inside the mounting holes of the float plate 3, and a positioning rod 10 is slidably connected within the grooves via a compression spring 15. One end of the positioning rod 10 is beveled, and the other end is connected to an external push-pull block 16 via a slide rod 14. Correspondingly, a positioning hole 13 is provided on the connecting ring 8.

[0028] During sealing, press down on the sealing end cap 4. The connecting ring 8 is inserted into the mounting hole, and its bottom presses against the inclined surface of the positioning rod 10, forcing the positioning rod 10 to retract into the movable groove 9. When the connecting ring 8 moves into position and the positioning hole 13 aligns with the positioning rod 10, the restoring force of the compression spring 15 pushes the positioning rod 10 to precisely engage in the positioning hole 13, achieving a secure lock and seal. This process requires no tools, can be completed with a single button, is simple to operate, and provides a reliable seal.

[0029] To unlock, simply pull the push-pull blocks 16 on both sides outwards, and the sliding rod 14 will drive the positioning rod 10 out of the positioning hole 13 to release the lock and easily remove the sealing end cover 4.

[0030] The device enables one-click quick installation and disassembly, which greatly facilitates wiring operations before blasting while ensuring the reliability of underwater sealing and improving operational efficiency.

[0031] The working process and principle of this utility model are as follows: In conventional and underwater environments, this invention achieves physical isolation between the positive and negative leads through the lead sleeve 7 and the connecting block 6, preventing internal short circuits. Simultaneously, a sealing system consisting of the float 3, sealing end cap 4, and sealing ring 11 prevents moisture intrusion that could lead to external short circuits. When detonation is required, the operator simply pulls the push-pull block 16 to quickly remove the sealing end cap 4, exposing the end of the electronic lead 5 for connection to the detonator. The entire process is safe, reliable, and convenient, effectively solving the short-circuit risk of electronic detonators in complex application scenarios.

[0032] 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 to the technical solutions of the present utility model by those skilled in the art 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 short-circuit protection structure for an electronic detonator lead wire, comprising a detonator body (1), a waterproof outer shell (2), and an electronic lead wire (5), wherein the electronic lead wire (5) is electrically connected to the detonator body (1) and extends to the inner side of the waterproof outer shell (2), characterized in that, The waterproof housing (2) has two lead sleeves (7) for separating the conduction, and a connecting block (6) located above the lead sleeves (7); the connecting block (6) has two wire holes (12) that correspond one-to-one with the lead sleeves (7) and are coaxially arranged; the electronic lead (5) includes a positive electronic lead and a negative electronic lead, which are respectively inserted into different lead sleeves (7) and wire holes (12).

2. The short-circuit protection structure for electronic detonator leads according to claim 1, characterized in that, A floating plate (3) is fixedly installed at the end of the waterproof shell (2), and a sealing end cap (4) is detachably provided on the floating plate (3); a connecting ring (8) is fixed on the inner bottom side of the sealing end cap (4), and an installation hole is provided in the middle of the floating plate (3) for the connecting ring (8) to be inserted and form a sealing fit.

3. The short-circuit protection structure for electronic detonator leads according to claim 2, characterized in that, The electronic lead wire (5) passes through the wire hole (12) and extends to the inside of the sealing end cap (4).

4. The short-circuit protection structure for electronic detonator leads according to claim 2, characterized in that, A sealing ring (11) is provided on the float plate (3), and the bottom outer wall of the sealing end cap (4) is in close contact with the inner wall of the sealing ring (11).

5. The short-circuit protection structure for electronic detonator leads according to claim 2, characterized in that, The floating plate (3) has symmetrically arranged movable grooves (9) inside the mounting hole, and a positioning rod (10) is slidably connected in the movable groove (9); the connecting ring (8) has a positioning hole (13) that matches the positioning rod (10); one end of the positioning rod (10) is connected to the movable groove (9) through an elastic reset mechanism, and the other end has an inclined surface, so that when the connecting ring (8) is inserted into the mounting hole, the inclined surface can be squeezed and the positioning rod (10) can be retracted, and when the positioning hole (13) moves to the corresponding position, the positioning rod (10) is stuck into the positioning hole (13) under the action of the elastic reset mechanism.

6. The short-circuit protection structure for electronic detonator leads according to claim 5, characterized in that, The elastic reset mechanism includes a compression spring (15); one end of the positioning rod (10) is fixedly connected to a slide rod (14), the slide rod (14) slides through the through hole in the side wall of the float plate (3), and a push-pull block (16) is fixed at one end of the slide rod (14) located outside the float plate (3); the compression spring (15) is sleeved on the slide rod (14), and its two ends abut against the inner wall of the movable groove (9) and the end of the positioning rod (10) respectively.

7. The short-circuit protection structure for electronic detonator leads according to claim 1, characterized in that, The lead sleeve (7) is symmetrically arranged on the inner side of the waterproof outer shell (2).

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