A quick connecting device for detonating cord

Abstract

The utility model relates to a kind of detonating cord quick connecting device in detonating cord connection technical field, containing the tee joint of main cord insert sleeve part and branch cord insert sleeve part, the outer end inner wall of branch cord insert sleeve part is equipped with snap spring for the tight hoop detonating branch cord, the inner end port of branch cord insert sleeve part is connected with the limiting stop piece corresponding the corresponding end face of detonating branch cord;The detonating cord quick connecting device can improve the connection quality and connection efficiency of detonating cord.

Description

Technical Field

[0001] This utility model relates to the field of detonating cord connection technology, and in particular to a quick-connect device for detonating cord. Background Technology

[0002] Traditional detonating cords are mainly fixed by binding or overlapping with adhesive tape. However, these binding methods require a high level of skill from construction workers and have low efficiency. Furthermore, the need for a certain length of detonating cord for binding leads to waste and increases material costs. Chinese utility model patent CN214781559U discloses a connecting fastener for detonating cords. By setting a connecting box to guide and connect multiple detonating cords, it can improve connection efficiency and reduce waste. However, like traditional connection methods, this existing technology still has the following drawbacks: it cannot control the tightness of the detonating cord connection. An overly tight connection may damage the outer structure of the detonating cord, affecting normal detonation and causing safety accidents. If the connection is too loose, in the complex construction environment of tunnels, factors such as vibration and moisture can further loosen the connected detonating cords, reducing connection quality. Utility Model Content

[0003] In order to overcome the shortcomings in the background technology and solve the existing technical problems, this utility model discloses a quick connection device for detonating cord, which can improve the connection quality and connection efficiency of detonating cord.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A quick-connect device for detonating cord includes a tee connector consisting of a main cord sleeve and a branch cord sleeve. The outer end of the branch cord sleeve is fitted with a retaining spring for tightening the detonating cord, and the inner port of the branch cord sleeve is connected to a limiting stop corresponding to a local end face of the detonating cord.

[0006] Furthermore, the length of the main cable sleeve is 3 to 5 times the diameter of the detonating main cable, and the tolerance between the inner diameter of the main cable sleeve and the outer diameter of the detonating main cable is ±0.05mm.

[0007] Furthermore, the wall surface of the main cable insert portion away from the branch cable insert portion is missing to form a through groove, the top groove width of the through groove is smaller than the diameter of the detonating main cable, and the top of the inner groove wall of the through groove is provided with an outer chamfer; the material of the main cable insert portion is engineering plastic.

[0008] Furthermore, the outer wall of the main cable sleeve is provided with external threads and is screwed with a fastening nut.

[0009] Furthermore, the inner wall of the middle part of the support cable sleeve is provided with an annular groove, and a sealing ring is embedded in the annular groove.

[0010] Furthermore, the sleeve hole of the support cable insert is a stepped hole with an outer hole diameter larger than the inner hole diameter, and a support ring is inserted and fixed in the outer hole section, and the outer edge of the snap ring is fixed to the inner wall of the support ring.

[0011] Furthermore, the outer end inner wall of the support cable sleeve is uniformly provided with a plurality of limiting grooves along the axial direction of the support cable sleeve, and the outer edge of the snap ring is fixed with a protrusion corresponding to the limiting groove.

[0012] Furthermore, the inner ring surface of the retaining ring is uniformly provided with multiple elastic teeth.

[0013] Furthermore, the limiting stop includes two symmetrically fixed protrusions on both sides of the inner port of the support cable insert, and the corresponding end face of the detonating cable is provided with a notch adapted to the insert protrusion.

[0014] Furthermore, the main cable sleeve and the support cable sleeve are integrally connected, and the tolerance between the inner diameter of the support cable sleeve and the outer diameter of the detonating cable is ±0.01mm.

[0015] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0016] The detonating cord quick connection device disclosed in this utility model can use the main cord sleeve and the branch cord sleeve to respectively install and fix the detonating main cord and the detonating branch cord, ensuring the convenience and economy of the connection. More importantly, when installing the detonating branch cord, the snap ring can provide stable friction to prevent the detonating branch cord from slipping, and the limiting stop can ensure the precise positioning of the detonating branch cord with the detonating main cord. This eliminates problems such as uneven force and position deviation caused by manual operation. In complex tunnel construction environments, it can reliably maintain the connection state, stably transmit explosive energy, greatly improve the stability and reliability of the blasting effect, reduce the risk of blasting failure caused by poor connection, and effectively ensure the smooth progress of tunnel construction. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the embodiment structure of this utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0020] Figure 4 This is a schematic diagram of the structure of the snap ring;

[0021] Figure 5 This is a schematic diagram of the structure of the sealing ring.

[0022] In the diagram: 1. Main cable insert; 101. Through groove; 102. Outer chamfer; 2. Support cable insert; 3. Snap ring; 301. Elastic toothed plate; 4. Limiting stop; 5. Sealing ring; 6. Supporting ring sleeve. Detailed Implementation

[0023] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0024] Combined with appendix Figure 1-5 The aforementioned detonating cord quick-connect device includes a tee connector composed of a main cord sleeve 1 and a branch cord sleeve 2. The main cord sleeve 1 and the branch cord sleeve 2 are perpendicularly aligned, with the sleeve hole of the branch cord sleeve 2 extending to the sleeve hole of the main cord sleeve 1, ensuring that the corresponding end face of the detonating cord inserted in the branch cord sleeve 2 can correspondingly abut against the detonating main cord inserted in the main cord sleeve 1. As needed, the length of the main cord sleeve 1 is 3 to 5 times the diameter of the detonating main cord, thereby ensuring a secure fastening effect on the detonating main cord. The tolerance between the inner diameter of the main cord sleeve 1 and the outer diameter of the detonating main cord is ±0.05mm to ensure a tight fit. Furthermore, the main cord sleeve 1 and the branch cord sleeve 2 are integrally connected, facilitating manufacturing and ensuring connection strength. The tolerance between the inner diameter of the branch cord sleeve 2 and the outer diameter of the detonating cord is ±0.01mm, also ensuring a tight fit with the detonating cord.

[0025] As required, as attached Figure 1 As shown, the wall surface of the main cable insert part 1, away from the branch cable insert part 2, is missing to form a through groove 101, which facilitates the detonating main cable to be directly inserted into the groove 101. The top width of the through groove 101 is smaller than the diameter of the detonating main cable. The top of the inner wall of the through groove 101 is provided with an outer chamfer 102, which makes it easier for the detonating main cable to be inserted, and once inserted, it will not easily detach from the narrower groove. The main cable insert part 1 is made of high-strength engineering plastic, which has good toughness and wear resistance and can withstand the impact force generated during blasting without damage. In addition, the outer wall of the main cable insert part 1 is provided with external threads and a fastening nut is screwed on. By screwing on the nut, the groove 101 is partially blocked, which can further tighten the detonating main cable and prevent it from detaching.

[0026] The outer end of the cable insert 2 is fitted with a retaining spring 3 for tightening the detonating cable. The retaining spring 3 is a ring structure made of stainless steel, which has good elasticity and corrosion resistance. The inner diameter of the retaining spring 3 is slightly smaller than the outer diameter of the detonating cable, which facilitates the clamping of the detonating cable after it passes through. The inner ring surface of the retaining spring 3 is evenly provided with multiple elastic teeth 301, specifically twelve elastic teeth 301 arranged in a topological configuration. During the insertion of the detonating cable, the elastic teeth 301 of the retaining spring 3 are compressed and elastically deformed. The spring clip 3 is adjusted to tightly hold the detonating cord, thereby increasing the friction between the detonating cord and the cord insert 2 and preventing the detonating cord from falling off. Specifically, the spring clip 3 can be installed in two ways: one is to design the sleeve hole of the cord insert 2 as a stepped hole with an outer diameter larger than the inner diameter, and a support ring 6 is inserted and fixed in the outer section. The support ring 6 is made of metal, has sufficient strength, and is detachable. The outer edge of the spring clip 3 is fixed to the inner wall of the support ring 6, which can be fixed by welding or by attaching an attachment. Figure 3 As shown, a stepped hole is provided in the sleeve hole of the supporting ring sleeve 6 to fix the snap ring 3 to the stepped surface; secondly, multiple limiting grooves are evenly arranged around the inner wall of the outer end of the support cable insert sleeve 2 along the axial direction of the support cable insert sleeve 2, and the outer edge of the snap ring 3 is fixed with a corresponding protrusion inserted into the limiting groove, and the snap ring 3 is fixed by the insertion of the protrusion and the limiting groove.

[0027] The inner port of the support cable insert 2 is connected to a limiting stop 4 corresponding to a partial end face of the detonating cable. The limiting stop 4 does not completely block the detonating cable, but while preventing excessive insertion, it exposes part of the end face of the detonating cable, allowing it to contact and connect with the main detonating cable, thus achieving a precise positioning effect. Depending on the needs, the limiting stop 4 includes two symmetrically fixed protrusions on both sides of the inner port of the support cable insert 2, which can balance the blocking effect. The corresponding end face of the detonating cable is provided with a notch adapted to the insertion protrusion; the notch fits to prevent... The detonating cord can deform, allowing for axial and circumferential positioning. As needed, the inner wall of the cord insert 2 has an annular groove, in which a sealing ring 5 is embedded. The sealing ring 5 is made of rubber and possesses good waterproofness, weather resistance, and elasticity. The inner diameter of the sealing ring 5 is the same as the outer diameter of the detonating cord. When the detonating cord is inserted into the cord insert 2, the sealing ring 5, under its own elasticity, tightly adheres to the surface of the detonating cord, forming a waterproof seal. This prevents external water from seeping into the detonating cord and prevents the end of the detonating cord from failing due to water. (See attached...) Figure 3 As shown, the sealing ring 5 can be press-fitted and fixed by the supporting ring sleeve 6, which facilitates disassembly and assembly.

[0028] To implement the detonating cord quick connection device described in this utility model, firstly, the main cord sleeve 1 is fitted onto the detonating main cord, ensuring that the detonating main cord is centered in the main cord sleeve 1, so that the main cord sleeve 1 tightly holds the detonating main cord; next, one end of the detonating branch cord to be connected is inserted into the branch cord sleeve 2. During the insertion process, the notch on the end face of the detonating branch cord aligns and engages with the extension protrusion to ensure accurate insertion of the detonating branch cord; simultaneously, the retaining spring 3 undergoes elastic deformation under the compression of the detonating branch cord, tightly holding the detonating branch cord; throughout the entire connection process, construction personnel do not need complicated binding techniques, but only need to follow the above steps to quickly and firmly complete the connection of the detonating cord, effectively improving construction efficiency while ensuring connection quality.

[0029] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A quick-connect device for detonating cord, characterized in that: The device includes a three-way connector consisting of a main cable insert (1) and a branch cable insert (2). The outer end of the branch cable insert (2) is fitted with a retaining spring (3) for tightening the detonating cable. The inner port of the branch cable insert (2) is connected to a limiting stop (4) corresponding to a local end face of the detonating cable.

2. The quick-connect device for detonating cord according to claim 1, characterized in that: The length of the main cable insert (1) is 3 to 5 times the diameter of the detonating main cable, and the tolerance between the inner diameter of the main cable insert (1) and the outer diameter of the detonating main cable is ±0.05mm.

3. The quick-connect device for detonating cord according to claim 1, characterized in that: The wall surface of the main cable insert (1) away from the branch cable insert (2) is missing to form a through groove (101). The top groove width of the through groove (101) is smaller than the diameter of the detonating main cable. The top of the inner groove wall of the through groove (101) is provided with an outer chamfer (102). The material of the main cable insert (1) is engineering plastic.

4. The quick-connect device for detonating cord according to claim 1, characterized in that: The outer wall of the main cable insert (1) is provided with external threads and is fitted with a fastening nut.

5. The quick-connect device for detonating cord according to claim 1, characterized in that: The inner wall of the middle part of the support sleeve (2) is provided with an annular groove, and a sealing ring (5) is embedded in the annular groove.

6. The quick-connect device for detonating cord according to claim 1, characterized in that: The sleeve hole of the support cable insert (2) is a stepped hole with an outer hole diameter larger than the inner hole diameter. The outer hole is fitted with a support ring sleeve (6), and the outer edge of the snap ring (3) is fixed to the inner wall of the support ring sleeve (6).

7. The quick-connect device for detonating cord according to claim 1, characterized in that: The inner wall of the outer end of the cable insert (2) is uniformly provided with a plurality of limiting grooves along the axial direction of the cable insert (2), and the outer edge of the snap ring (3) is fixed with a protrusion corresponding to the limiting groove.

8. The quick-connect device for detonating cord according to claim 1, characterized in that: The inner ring surface of the snap ring (3) is uniformly provided with multiple elastic teeth (301).

9. The quick-connect device for detonating cord according to claim 1, characterized in that: The limiting stop (4) includes two symmetrically fixed protrusions on both sides of the inner port of the cable insert (2), and the corresponding end face of the detonating cable is provided with a notch adapted to the insert protrusion.

10. The quick-connect device for detonating cord according to claim 1, characterized in that: The main cable insert (1) and the branch cable insert (2) are integrally connected, and the tolerance between the inner diameter of the branch cable insert (2) and the outer diameter of the detonating cable is ±0.01mm.

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