Anti-fracture mining through cable drill rod connecting structure

Abstract

The utility model discloses an anti-fracture mining through cable drill rod connecting structure which comprises a plastic female connector shell, a stainless steel connecting column, a male end copper conductor and a female end copper conductor, a male end copper conductor connecting cavity is formed in the left side of the plastic female connector shell, and a female end copper conductor connecting cavity is formed in the right side of the plastic female connector shell; the stainless steel connecting column is detachably arranged in the middle of the inner cavity of the plastic female joint shell and is communicated with the male end copper conductor connecting cavity and the female end copper conductor connecting cavity; the male end copper conductor and the female end copper conductor are arranged in the respective cable passing drill rods in a penetrating mode, and plastic cable passing protection line pipes are arranged on the outer sides of the male end copper conductor and the female end copper conductor. According to the utility model, the risk that the plastic female joint is stretched excessively due to overlarge pre-tightening force of the stainless steel connecting column and overlarge difference value of the copper conductors is thoroughly solved, the quality of the through cable drill rod is optimized and upgraded through the structure, and the service life of the through cable drill rod is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mine cable drill rods, in particular to a fracture-proof mine cable drill rod connection structure. Background Art

[0002] Cable drill rod, also known as directional drill rod, is mainly used for deep hole directional drilling by kilometer directional drilling rig. It is an important drilling tool in directional drilling of underground coal mine tunnels and geological controlled directional drilling construction, and plays an important role in coal seam measurement and gas extraction construction in coal mines. Generally, the standard length of each cable drill rod is 3 meters. In the actual application of coal mining, the drilling distance usually reaches thousands of meters. This thousand-kilometer distance is connected by several cable drill rods. Specifically, plastic male connectors and plastic female connectors are respectively provided at both ends of each cable drill rod to facilitate the fixed connection of each cable drill rod. However, due to the unreasonable design structure of the plastic male connectors and plastic female connectors at both ends of the cable drill rod in the existing technology, when the copper conductor is subjected to the limit of tension, the plastic connector will yield and compress and then turn into plastic tensile deformation. When the initial preload and tension are too large and are affected by factors such as low temperature and fatigue, there will be a risk of elongation and breaking of the plastic connector, which will cause the copper conductor to short-circuit, posing a great safety hazard. Utility Model Content

[0003] The purpose of the utility model is to provide a fracture-resistant mining cable drill rod connection structure. The utility model completely solves the risk of excessive stretching of the plastic female connector due to excessive pre-tightening force of the stainless steel connecting column and excessive difference in copper conductors. This structure optimizes and upgrades the quality of the cable drill rod and extends its service life.

[0004] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a breakage-resistant mining cable drill rod connection structure, comprising a plastic female connector shell, a stainless steel connecting column, a male copper conductor, and a female copper conductor. The left side of the plastic female connector shell is a male copper conductor connection cavity, and the right side is a female copper conductor connection cavity; the stainless steel connecting column is detachably arranged in the middle of the inner cavity of the plastic female connector shell and is interconnected with the male copper conductor connection cavity and the female copper conductor connection cavity; the male copper conductor and the female copper conductor are both arranged through the interior of their respective cable drill rods, and plastic cable protection wire tubes are provided on the outside of the male copper conductor and the female copper conductor.

[0005] Furthermore, the plastic female connector shell is embedded and fixedly connected to one end of the cable drill pipe; the outer wall of the plastic female connector shell is a stepped structure, and the outer diameter of the left half is significantly smaller than the outer diameter of the right half.

[0006] Furthermore, a supporting step surface is provided in the female end copper conductor connection cavity, and the supporting step surface is in contact connection with the stainless steel connection column. The supporting step surface plays a supporting and limiting role and has strong tensile strength.

[0007] Furthermore, an annular protrusion is provided at the right end of the stainless steel connecting column, and the annular protrusion is in contact-fitting connection with the supporting step surface.

[0008] Furthermore, the female copper conductor is fixedly connected to the stainless steel connecting column by using threads, and the male copper conductor is fixedly connected to the male connector on another cable drill rod.

[0009] Furthermore, the cable protection conduit is respectively arranged on the outside of the male copper conductor and the female copper conductor by extrusion molding.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This new design incorporates a support step within the female conductor connection cavity, which engages with the annular protrusion at the right end of the stainless steel connection. This structural design increases the tensile surface area of ​​the plastic female connector, significantly increasing the tensile strength of the copper conductor. This design completely eliminates the risk of excessive stretching of the plastic female connector caused by excessive preload on the stainless steel connection column and a large difference in the copper conductors. This structure optimizes and upgrades the quality of the cable-through drill pipe, extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the plastic female connector shell of the present utility model;

[0014] Figure 3 This is a schematic diagram of the stainless steel connecting column structure of the present utility model.

[0015] In the figure: 1. Plastic female connector housing; 101. Male copper conductor connection cavity; 102. Female copper conductor connection cavity; 103. Support step surface; 2. Stainless steel connecting column; 201. Annular protrusion; 3. Male copper conductor; 4. Female copper conductor; 5. Plastic cable protection conduit. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-3 The present invention provides a fracture-resistant mining cable drill rod connection structure, comprising a plastic female connector shell 1, a stainless steel connecting column 2, a male copper conductor 3, and a female copper conductor 4. The left side of the plastic female connector shell 1 is a male copper conductor connection cavity 101, and the right side is a female copper conductor connection cavity 102; the stainless steel connecting column 2 is detachably arranged in the middle of the inner cavity of the plastic female connector shell 1 and is interconnected with the male copper conductor connection cavity 101 and the female copper conductor connection cavity 102; the male copper conductor 3 and the female copper conductor 4 are both arranged through the interior of their respective cable drill rods, and a plastic cable protection wire tube 5 is provided on the outside of the male copper conductor 3 and the female copper conductor 4. In the present invention, the plastic female connector shell 1 is embedded and fixedly connected to one end of the cable drill rod; the outer wall of the plastic female connector shell 1 is a stepped structure, and the outer diameter of the left half is significantly smaller than the outer diameter of the right half. A support step surface 103 is provided in the female copper conductor connection cavity 102, and the support step surface 103 is in contact connection with the stainless steel connecting column 2. The support step surface 103 plays a supporting and limiting role and has strong tensile strength. The right end of the stainless steel connecting column 2 is provided with an annular protrusion 201, and the annular protrusion 201 is in contact connection with the support step surface 103. The female copper conductor 102 is fixedly connected to the stainless steel connecting column 2 by a thread, and the male copper conductor 101 is fixedly connected to the male connector on another cable drill rod. The cable protection wire tube 5 is respectively arranged on the outside of the male copper conductor 3 and the female copper conductor 4 by extrusion molding, and has strong insulation performance.

[0018] When in use, the male and female connectors of the two cable drill rods are aligned, and the outer side of the male copper conductor 3 is provided with an external thread, which is matched with the internal thread of the stainless steel connecting column built into the plastic female connector housing 1 to connect the two cable drill rods firmly together. Since the supporting step surface 103 built into the female copper conductor connection cavity is integrally injection molded with the plastic female connector housing 1, the contact area when connected with the annular protrusion 201 at the right end of the stainless steel connecting column 2 is large, which greatly improves the tensile force between the plastic female connector and the copper conductor, and completely solves the risk of excessive stretching of the plastic female connector due to excessive pre-tightening force of the stainless steel connecting column and excessive difference in copper conductors. This structure optimizes and upgrades the quality of the cable drill rod and extends its service life.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fracture-proof mining cable drill rod connection structure, characterized by: The invention comprises a plastic female connector shell (1), a stainless steel connecting column (2), a male copper conductor (3), and a female copper conductor (4); the left side of the plastic female connector shell (1) is a male copper conductor connecting cavity (101), and the right side is a female copper conductor connecting cavity (102); the stainless steel connecting column (2) is detachably arranged in the middle of the inner cavity of the plastic female connector shell (1) and is interconnected with the male copper conductor connecting cavity (101) and the female copper conductor connecting cavity (102); the male copper conductor (3) and the female copper conductor (4) are both arranged to penetrate the interior of their respective cable drill rods, and the outer sides of the male copper conductor (3) and the female copper conductor (4) are both provided with plastic cable protection conduits (5).

2. The anti-fracture mining cable drill rod connection structure according to claim 1, characterized in that: The plastic female connector shell (1) is embedded and fixedly connected to one end of the cable drill rod; the outer wall of the plastic female connector shell (1) is a stepped structure, and the outer diameter of the left half is significantly smaller than the outer diameter of the right half.

3. The anti-fracture mining cable drill rod connection structure according to claim 1, characterized in that: A supporting step surface (103) is provided in the female copper conductor connection cavity (102), and the supporting step surface (103) is in contact connection with the stainless steel connection column (2). The supporting step surface (103) plays a supporting and limiting role and has a strong tensile strength.

4. The anti-fracture mining cable drill rod connection structure according to claim 1, characterized in that: The right end of the stainless steel connecting column (2) is provided with an annular protrusion (201), and the annular protrusion (201) is in contact-fitting connection with the supporting step surface (103).

5. The anti-fracture mining cable drill rod connection structure according to claim 1, characterized in that: The female copper conductor (4) is fixedly connected to the stainless steel connecting column (2) by means of threads, and the male copper conductor (3) is fixedly connected to a male connector on another cable drill rod.

6. The anti-fracture mining cable drill rod connection structure according to claim 1, characterized in that: The cable protection conduits (5) are respectively arranged on the outsides of the male-end copper conductor (3) and the female-end copper conductor (4) by extrusion molding.

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