Explosion assisting clamping piece for multi-branch synchronous detonation

Abstract

The explosion-aiding clamping piece for multi-branch synchronous detonation comprises an explosion-aiding cord, the explosion-aiding cord comprises a shell and a flux core, the shell is a cylindrical pipe, the flux core is filled in the shell to form the explosion-aiding cord, and the two ends of the explosion-aiding cord are mutually folded in half from the midpoint of the explosion-aiding cord to form the U-shaped explosion-aiding clamping piece. When in use, the U-shaped explosion-assisting clamping piece is additionally arranged on two sides of a branch detonating cord and a main detonating cord which are connected in parallel, and is wound and fixed by materials such as an adhesive tape, a binding wire and a rubber band, so that the explosion-assisting clamping piece disclosed by the utility model has a certain enhancement effect on the propagation of main side detonation waves, and the explosion-assisting clamping piece enables an explosive of a branch detonating cord flux core to be subjected to stronger impact; therefore, the branch detonating cord network can realize reliable explosion propagation, and the explosion propagation reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blasting engineering, and particularly relates to an explosion-assisting card for multi-branch synchronous detonation. Background Art

[0002] In coal mining operations or tunnel blasting operations in gas and coal dust environments, blasting equipment such as detonating cords, detonators and explosives permitted in coal mines must be used. Among them, detonating cords permitted in coal mines, as a high-explosion-rate detonating equipment, can make it possible to apply new blasting technologies such as smooth blasting and medium-deep hole pre-splitting blasting.

[0003] The detonating cord permitted for coal mines is a kind of pyrotechnic product with single-element high explosives such as ether or RDX as the core, supplemented with flame extinguisher, and covered with fiber or plastic. Because it adopts the charge structure containing flame extinguisher, it can meet the requirements of self-explosion in coal dust and gas environment without igniting coal dust and gas, and can be used for blasting operations in coal dust and gas environment.

[0004] In the prior art, compared with ordinary industrial detonating cords, there is no difference in the axial detonation speed of the two, but the lateral detonation input capacity of the permissible detonating cord for coal mines is weaker than that of ordinary detonating cords. The MT519 standard stipulates that the permissible detonating cords for coal mines are generally required to be detonated through the root. Because its lateral mutual explosion sensing ability is weak, it cannot reliably detonate another detonating cord connected to it laterally, especially it cannot realize synchronous and reliable detonation of the branch blasthole detonating cord connected to it laterally after the main detonating cord is detonated by common lap, bow tie, sailor knot and other connection methods like ordinary detonating cords, which cannot meet the functional requirements of the main detonating cord to detonate multiple branch detonating cords, limiting its efficient and safe operation in tunnel excavation under gas and coal dust environment by adopting new technology of synchronous detonation of multiple branches in group holes. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an explosion-assisting card for multi-branch synchronous detonation.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A booster card for multi-branch synchronous detonation includes a booster cord, which includes a shell and a core. The shell is a cylindrical tube. The core is filled in the shell to form a booster cord. The two ends of the booster cord are folded from the midpoint of the booster cord to form a U-shaped booster card.

[0008] Preferably, the length of the shell is greater than 50 mm, and the outer diameter of the shell is 3±1 mm.

[0009] Preferably, the radius of the U-shaped inner bend of the explosion-boosting card is greater than 2 mm.

[0010] Preferably, the shell of the detonating cord is made of lead-antimony alloy material.

[0011] Preferably, the core of the detonating cord is one or more inorganic salt compound powders.

[0012] Beneficial effects of the utility model

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] When in use, the U-shaped explosion-boosting card is attached to both sides of two parallel branch and main detonating cords, and is fixed by winding with materials such as tape, wire, rubber band, etc. The explosion-boosting card of the utility model has a certain enhancing effect on the propagation of the lateral detonation wave of the main line. The explosion-boosting card causes the explosives in the core of the branch detonating cord to be subjected to a stronger impact, so that the branch detonating cord network can reliably transmit the explosion, thereby improving the reliability of explosion transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 , 3 4 is a schematic diagram of the structure of the connection between the explosion-boosting card and the detonating cord of the utility model;

[0017] Figure 5 for Figure 2 Cross-sectional view of section AA. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 The utility model provides a technical solution: an explosive booster card for multi-branch synchronous detonation, including an explosive booster cord, the explosive booster cord includes a shell 1 and a core 2, the shell 1 is a cylindrical tube, the core 2 is filled in the shell 1 to form an explosive booster cord, and the two ends of the explosive booster cord are folded from the midpoint of the explosive booster cord to form a U-shaped explosive booster card.

[0022] When using, Figure 2-5 As shown, U-shaped explosion-boosting clips are attached to both sides of two parallel branch and main detonating cords and fixed with tape, wire ties, rubber bands and other materials. The explosion-boosting clips have a certain enhancing effect on the propagation of the lateral detonation wave of the main line. The explosion-boosting clips make the explosives in the core of the branch detonating cord receive a stronger impact, so that the branch detonating cord network can reliably transmit the explosion, thereby improving the reliability of explosion transmission.

[0023] Furthermore, the length of the shell 1 is greater than 50 mm, and the outer diameter of the shell 1 is 3±1 mm.

[0024] Furthermore, the radius of the U-shaped inner bend of the explosion-boosting card is greater than 2 mm.

[0025] Preferably, the shell 1 of the detonating cord is made of lead-antimony alloy material.

[0026] Preferably, the core 2 of the detonating cord is one or more inorganic salt compound powders.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-boosting card for multi-branch synchronous detonation, characterized in that: The invention comprises a detonating cord, wherein the detonating cord comprises a shell (1) and a powder core (2), wherein the shell (1) is a cylindrical tube, the powder core (2) is filled in the shell (1) to form a detonating cord, and the two ends of the detonating cord are folded together at the midpoint of the detonating cord to form a U-shaped detonating clip.

2. The explosion-boosting card for multi-branch synchronous detonation according to claim 1, characterized in that: The length of the shell (1) is greater than 50 mm, and the outer diameter of the shell (1) is 3±1 mm.

3. The explosion-boosting card for multi-branch synchronous detonation according to claim 2, characterized in that: The radius of the U-shaped inner bend of the explosion-boosting card is greater than 2 mm.

4. The explosion-boosting card for multi-branch synchronous detonation according to claim 1, characterized in that: The shell (1) of the detonating cord is made of a lead-antimony alloy material.

5. The explosion-boosting card for multi-branch synchronous detonation according to claim 1, characterized in that: The explosive core (2) of the detonating cord is one or more inorganic salt compound powders.

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