Fixing and locking device for electronic detonator leg wire
By designing a fixing and locking device, the sealing problem caused by the deformation of the locking plug during the blasting process of the electronic detonator was solved, achieving stable fixing and sealing under high pressure environment and ensuring the normal operation of the detonator.
Patent Information
- Application Number
- CN202520315103.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In engineering blasting, the locking plug and lead wire at the tight end of the electronic detonator are prone to deformation due to large forces, resulting in poor sealing and potentially allowing water and mud to enter the detonator, causing it to fail.
A locking device for securing electronic detonator leads was designed, comprising a lower cover and an upper cover. Through structures such as a fixing shaft, a rotating shaft, and a buckle, the leads are securely fixed inside the lower cover, capable of withstanding large tensile forces and preventing deformation of the locking plug.
This ensures that the sealing of the electronic detonator in the borehole is not affected, avoids deformation of the jamming plug due to tension, and guarantees the normal operation of the detonator.
Smart Images
Figure CN223940120U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of civil explosives technology, specifically relating to a fixing and locking device for electronic detonator lead wires. Background Technology
[0002] According to relevant requirements, all engineering blasting operations must use electronic detonators instead of the original detonating cord detonators and ordinary electric detonators. When electronic detonators are inserted into the blast hole during engineering blasting operations, they must be used in conjunction with detonating grenades or detonating cartridges. The lead wire of the electronic detonator is threaded through the middle of the detonating grenades or detonating cartridges, and the electronic detonator is threaded inside the detonating grenades or detonating cartridges. In the blast hole, the detonating grenades or detonating cartridges are subjected to impacts and pressures from emulsion explosives, mud, sand, rock, soil, water, etc. The force is ultimately transmitted to the locking plug and lead wire at the sealing part of the electronic detonator.
[0003] When the force is large, the locking plug and lead wire at the tight end of the electronic detonator will deform, resulting in poor sealing of the electronic detonator. Sometimes water can seep into the detonator through the locking plug, causing a large current to appear in the electronic detonator chip, or even short-circuiting and failing. Utility Model Content
[0004] The purpose of this invention is to provide a fixing and locking device for the lead wire of an electronic detonator, which solves the problem that during engineering blasting, due to the large force applied, the locking plug and lead wire at the tight end of the electronic detonator will deform, resulting in poor sealing of the electronic detonator.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a fixing and locking device for electronic detonator lead wires, including a lower cover and an upper cover; the side of the lower cover is provided with an inlet and an outlet, and a fixing shaft is provided inside the lower cover; the upper cover is fastened together with the lower cover, and a cavity is provided on the lower side of the upper cover, the inner cavity of which matches the shape of the fixing shaft.
[0006] The technical solution of this utility model also has the following characteristics:
[0007] The top and bottom covers are hinged together.
[0008] The lower cover has a pivot on its side, and the upper cover has a pair of pivot seats on its side, with the two ends of the pivot inserted into the two pivot seats respectively.
[0009] The inlet and outlet are arranged symmetrically at 180°.
[0010] The upper part of the fixed shaft is tapered.
[0011] The upper cover has a buckle on its side, and the lower cover has a slot on its inner side that engages with the buckle.
[0012] The bottom cover is cylindrical.
[0013] A limit ring is provided on the top inner side of the body.
[0014] The beneficial effects of this utility model are as follows: The electronic detonator lead wire of this utility model is fixed and locked so that the lead wire is wound around the fixed shaft inside the lower cover one and a half turns and comes out from both ends of the lower cover. Then, the upper cover is used to fasten the lower cover together to further fix the lead wire. This interaction force makes the lead wire firmly fixed in the lower cover and prevents the lead wire from slipping. In the blast hole, the electronic detonator is surrounded by emulsion explosives, water, mud and diesel, etc. Through experiments, this snap-fit assembly method can withstand a tensile force of 30Kgf without causing the lead wire to loosen. It also prevents the detonator's locking plug from deforming due to the tensile force brought by the lead wire, thus meeting the blasting requirements. Attached Figure Description
[0015] Figure 1 This is a structural schematic diagram of a fixing and locking device for electronic detonator lead wires according to this utility model;
[0016] Figure 2 This is a schematic diagram of the assembly in the borehole of a fixing and locking device for electronic detonator leads according to this utility model;
[0017] Figure 3 yes Figure 2 A magnified view of a portion of the image.
[0018] In the diagram, 1. lower cover, 2. fixed shaft, 3. slot, 4. cable outlet, 5. rotating shaft, 6. rotating shaft seat, 7. limiting ring, 8. buckle, 9. cavity, 10. upper cover, 11. cable inlet, 12. lead wire, 13. bayonet plug, 14. detonating shell, 15. electronic detonator, 16. explosive, 17. soil, 18. blast hole. Detailed Implementation
[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] Example 1
[0021] like Figure 1 As shown, the present invention discloses a fixing and locking device for electronic detonator lead wires, comprising a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is provided inside the lower cover 1; the upper cover 10 is fastened together with the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the outer shape of the fixing shaft 2.
[0022] like Figure 2 and Figure 3As shown, in the original case of using detonating ammunition in a blast hole, a blast hole 18 was first drilled in the mine area soil 17. Then, an electronic detonator 15 was inserted into the detonating ammunition 14, and the lead wire 12 was pulled out of the detonating ammunition 14 in the opposite direction and brought to the ground. After the detonating ammunition 14 was placed in the blast hole 18, emulsion explosive 16 was loaded into the blast hole 18. After the explosive 16 was loaded, the electronic detonator 15 could be detonated through the lead wire 12. During the filling of the explosive 16, due to the pressure and impact of the explosive 16, the lead wire 12 would pull the electronic detonator 15 through the bayonet 13. The bayonet 13 is made of rubber, and under excessive tension, it will continuously deform, affecting the sealing of the opening of the electronic detonator 15. If there is water and mud inside the blast hole 18, water and mud may enter the electronic detonator 15, causing the electronic detonator 15 to fail to detonate.
[0023] To solve this problem, it is necessary to use a fixing and locking device for the lead wire of the electronic detonator according to this utility model to prevent the bayonet plug 13 of the electronic detonator 15 from deforming. The specific usage method is as follows:
[0024] Step 1: Take an electronic detonator lead wire fixing and locking device. In the lower cover 1, wind the lead wire 12 around the fixing shaft 2 through the wire inlet 11, making sure to wind it at least one and a half turns. This way, the lead wire 12 can extend out from the wire outlet 3. Usually, the electronic detonator lead wire fixing and locking device is about 8 cm away from the electronic detonator 15.
[0025] Step 2: After wrapping the foot line 12, place the upper cover 10 on top of the lower cover 1 to ensure that the two are fastened together.
[0026] Step 3: The lead wire 12 is tightly wrapped around the fixed shaft 2. Because the lead wire 12 is jointly bound by the lower cover 1, the fixed shaft 2 and the upper cover 10, the lead wire 12 will generate a large friction force. After testing, the lead wire 12 can withstand a force of 35Kgf, and the lead wire 12 will not slip or be pulled out.
[0027] When the detonating shell 14 is inserted into the borehole 18, the electronic detonator 15 in the borehole 18 is subjected to a tensile force of approximately 20 kgf. The bayonet plug 13 deforms under a tensile force of 10 kgf, and will deform under a tensile force exceeding 20 kgf, affecting the sealing of the electronic detonator 15. This could lead to water or sand ingress into the electronic detonator 15, causing a large current in the chip of the electronic detonator 12, and potentially resulting in failure. When the electronic detonator lead wire fixing and locking device is installed, it will lock into place in the middle of the detonating shell 14 under the tensile force of the lead wire 12. Since the electronic detonator lead wire fixing and locking device can withstand a tensile force of 35 kgf, it can independently bear all the tensile force, ensuring that the bayonet plug 13 is no longer subjected to tensile force and will not deform. This ensures the airtightness of the electronic detonator 12 bayonet plug 13, guaranteeing that the product will not have problems under harsh geological conditions.
[0028] Example 2
[0029] like Figure 1 As shown in Embodiment 1, Embodiment 2 is a fixing and locking device for electronic detonator lead wires of this utility model, which includes a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is provided inside the lower cover 1; the upper cover 10 is fastened together with the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the outer shape of the fixing shaft 2.
[0030] like Figure 1 As shown, unlike Embodiment 1, in this Embodiment 2, the upper cover 10 and the lower cover 1 of the present invention are hinged together in a fixing and locking device for electronic detonator lead wires.
[0031] The upper cover 10 and the lower cover 1 are hinged together to ensure that they are not separate parts. The operation is based on one of them, which ensures that the two can be quickly fastened together.
[0032] Example 3
[0033] like Figure 1 As shown in Embodiment 2, Embodiment 3, a fixing and locking device for electronic detonator leads of this utility model, includes a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened together with the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the outer shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together.
[0034] like Figure 2As shown, unlike Embodiment 2, in Embodiment 3, a fixing and locking device for electronic detonator lead wires of this utility model is provided with a rotating shaft 5 on the side of the lower cover 1 and a pair of rotating shaft seats 6 on the side of the upper cover 11. The two ends of the rotating shaft 5 are respectively inserted into the two rotating shaft seats 6.
[0035] As a preferred method for hinged connection between the upper cover 10 and the lower cover 1, this can be achieved using a pivot 5 and two pivot seats 6. Specifically, a pivot 5 is fixed to the side of the lower cover 1, and two pivot seats 6 are fixed to the side of the upper cover 10. Each pivot seat 6 has a shaft hole, and both ends of the pivot 5 are respectively inserted into the shaft holes of the two pivot seats 6. During operation, the upper cover 10 rotates around the pivot 5, achieving precise engagement between the upper cover 10 and the lower cover 1.
[0036] The pivot 5 and pivot seat 6 are used after assembly, allowing the upper cover 10 to rotate and engage around the lower cover 1. Ordinary plastic ribbed hinges become brittle at low temperatures, leading to hinge breakage. In contrast, the pivot 5 structure of this invention does not affect the performance of the plastic pivot regardless of temperature.
[0037] Example 4
[0038] like Figure 1 As shown in Embodiment 3, Embodiment 4, a fixing and locking device for electronic detonator leads of this utility model, includes a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened to the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together. A rotating shaft 5 is provided on the side of the lower cover 1, and a pair of rotating shaft seats 6 are provided on the side of the upper cover 11, with both ends of the rotating shaft 5 inserted into the two rotating shaft seats 6 respectively.
[0039] like Figure 1 As shown, unlike Embodiment 3, in Embodiment 4, the inlet 4 and outlet 11 of this utility model are arranged symmetrically at 180°.
[0040] The inlet 4 and outlet 11 are arranged symmetrically at 180°, so that the lead wire 12 only needs to be wrapped around the fixed shaft 2 one and a half times to enter from the inlet 11 on the lower cover 1 and exit from the outlet 3 on the lower cover 1, and can be stably fixed on the fixed shaft 2.
[0041] Example 5
[0042] like Figure 1As shown in Embodiment 4, Embodiment 5 provides a fixing and locking device for the lead wire of an electronic detonator, comprising a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened to the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together. A rotating shaft 5 is provided on the side of the lower cover 1, and a pair of rotating shaft seats 6 are provided on the side of the upper cover 11, with both ends of the rotating shaft 5 inserted into the two rotating shaft seats 6 respectively. The inlet 4 and the outlet 11 are arranged symmetrically at 180°.
[0043] like Figure 1 As shown, unlike Embodiment 4, in Embodiment 5, the upper part of the fixing shaft 2 is tapered in a fixing and locking device for electronic detonator leads of this utility model.
[0044] The upper part of the fixed shaft 2 is designed to be tapered, with the upper and lower ends of the upper part being larger. The inner cavity of the cavity 9 matches the tapered upper part of the fixed shaft 2. As the upper part of the fixed shaft 2 extends into the inner cavity of the cavity 9, a tight contact will be formed between the two, ensuring that the lead wire 12 is clamped between the fixed shaft 2 and the inner cavity of the cavity 9, forming a large friction force and good stability.
[0045] Example 6
[0046] like Figure 1 As shown in Embodiment 5, Embodiment 6, a fixing and locking device for electronic detonator leads of this utility model, includes a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened to the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together. A rotating shaft 5 is provided on the side of the lower cover 1, and a pair of rotating shaft seats 6 are provided on the side of the upper cover 11, with both ends of the rotating shaft 5 inserted into the two rotating shaft seats 6 respectively. The inlet 4 and the outlet 11 are arranged symmetrically at 180°. The upper part of the fixing shaft 2 is tapered.
[0047] like Figure 1 As shown, unlike Embodiment 5, in Embodiment 6, a locking device for fixing the lead wire of an electronic detonator according to this utility model, the upper cover 10 is provided with a buckle 8 on its side, and the lower cover 1 is provided with a slot 3 that cooperates with the buckle 8 on its inner side.
[0048] During assembly, the upper cover 10 is aligned with the lower cover 1 and snapped down. At this time, the buckle 8 on the side of the upper cover 10 will undergo a slight elastic deformation inward under the action of the inner wall of the lower cover 1. As the upper cover 10 moves down, when the buckle 8 passes through the slot 3 on the inner side of the lower cover 1, the buckle 8 will gradually recover its deformation and gradually fall into the slot 3, thereby completing the snap-fit fixation between the upper cover 10 and the lower cover 1.
[0049] Clip 8 is for single use only. It prevents the electronic detonator lead wire from being accidentally opened when used in the blast hole due to unpredictable forces such as mud and sand.
[0050] Example 7
[0051] like Figure 1 As shown in Embodiment 6, Embodiment 7 provides a fixing and locking device for the lead wire of an electronic detonator, comprising a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened to the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together. A rotating shaft 5 is provided on the side of the lower cover 1, and a pair of rotating shaft seats 6 are provided on the side of the upper cover 11, with both ends of the rotating shaft 5 inserted into the two rotating shaft seats 6 respectively. The inlet 4 and the outlet 11 are arranged symmetrically at 180°. The upper part of the fixing shaft 2 is tapered. A buckle 8 is provided on the side of the upper cover 10, and a slot 3 that mates with the buckle 8 is provided on the inner side of the lower cover 1.
[0052] like Figure 1 As shown, unlike Embodiment 6, in Embodiment 7, the lower cover 1 of the electronic detonator lead fixing and locking device of this utility model is cylindrical.
[0053] The lower cover 1 is selected as a cylindrical structure, which facilitates the design of fixing shaft 2 in its center, and also facilitates the fit between it and the cavity 9 on the lower side of the upper cover 10.
[0054] Example 8
[0055] like Figure 1 As shown in Embodiment 7, Embodiment 8 provides a fixing and locking device for the lead wire of an electronic detonator, comprising a lower cover 1 and an upper cover 10. The lower cover 1 has an inlet 11 and an outlet 4 on its side, and a fixing shaft 2 is disposed inside the lower cover 1. The upper cover 10 is fastened to the lower cover 1, and a cavity 9 is provided on the lower side of the upper cover 10, the inner cavity of which matches the shape of the fixing shaft 2. The upper cover 10 and the lower cover 1 are hinged together. A rotating shaft 5 is provided on the side of the lower cover 1, and a pair of rotating shaft seats 6 are provided on the side of the upper cover 11, with both ends of the rotating shaft 5 inserted into the two rotating shaft seats 6 respectively. The inlet 4 and the outlet 11 are arranged symmetrically at 180°. The upper part of the fixing shaft 2 is tapered. A buckle 8 is provided on the side of the upper cover 10, and a slot 3 that mates with the buckle 8 is provided on the inner side of the lower cover 1. The lower cover 1 is cylindrical.
[0056] like Figure 1 As shown, unlike Embodiment 7, in Embodiment 8, a limiting ring 7 is provided on the top inner side of the cavity 9 in a fixing and locking device for electronic detonator leads of this utility model.
[0057] The limiting ring 7 can prevent the fixed shaft 2 from extending too far and limit its extension to avoid damage caused by excessive extension.
[0058] Therefore, compared with the prior art, the electronic detonator lead wire of this utility model uses a fixing and locking device to make the lead wire wrap around the fixed shaft one and a half turns inside the lower cover and come out from both ends of the lower cover. Then, the upper cover is used to fasten the lower cover together to further fix the lead wire. This interaction force makes the lead wire firmly fixed in the lower cover and prevents the lead wire from slipping. In the blast hole, the electronic detonator is surrounded by emulsion explosives, water, mud and diesel, etc. Through experiments, this snap-fit assembly method can withstand a tensile force of 30 kgf without the lead wire loosening. It also prevents the detonator's locking plug from deforming due to the tensile force brought by the lead wire, thus meeting the blasting requirements.
Claims
1. A locking device for fixing the leads of an electronic detonator, characterized in that, It includes a lower cover (1) and an upper cover (10); the lower cover (1) has an inlet (11) and an outlet (3) on its side, and a fixed shaft (2) is provided inside the lower cover (1); the upper cover (10) is fastened together with the lower cover (1), and a cavity (9) is provided on the lower side of the upper cover (10), and the inner cavity of the cavity (9) matches the outer shape of the fixed shaft (2).
2. The fixing and locking device for electronic detonator lead wires according to claim 1, characterized in that, The upper cover (10) and the lower cover (1) are hinged together.
3. The fixing and locking device for electronic detonator lead wires according to claim 2, characterized in that, The lower cover (1) is provided with a rotating shaft (5) on its side, and the upper cover (11) is provided with a pair of rotating shaft seats (6) on its side. The two ends of the rotating shaft (5) are respectively inserted into the two rotating shaft seats (6).
4. The fixing and locking device for electronic detonator lead wires according to claim 3, characterized in that, The inlet (4) and outlet (11) are arranged symmetrically at 180°.
5. The fixing and locking device for electronic detonator lead wires according to claim 1, characterized in that, The upper part of the fixed shaft (2) is tapered.
6. The fixing and locking device for electronic detonator lead wires according to claim 1, characterized in that, The upper cover (10) is provided with a buckle (8) on its side, and the lower cover (1) is provided with a slot (3) that cooperates with the buckle (8) on its inner side.
7. The fixing and locking device for electronic detonator lead wires according to claim 6, characterized in that, The lower cover (1) is cylindrical.
8. The fixing and locking device for electronic detonator lead wires according to claim 1, characterized in that, A limiting ring (7) is provided on the top inner side of the cavity (9).