Mining flame-proof type power supply quick connection leading-in device

Abstract

The utility model belongs to the technical field of mining equipment, and provides a mining flame-proof type power supply quick connection lead-in device, which comprises a straight joint, a connecting shell in threaded fit with the straight joint is arranged in the straight joint, a nut is arranged on the connecting shell, a connector is arranged in the connecting shell, and the connector is connected with a power supply. A plurality of electronic wires are arranged at one end of the connector, a plurality of copper needles in one-to-one correspondence with the electronic wires are arranged at the other end of the connector, a self-locking piece is arranged at the end of the connecting shell and comprises a ring body, and the ring body is matched with a sinking groove formed in the end of the connecting shell. A plurality of wedge-shaped clamping bodies are arranged at one end, facing the connector, of the ring body; and the wedge-shaped clamping bodies are matched with axial grooves formed in the inner wall of the connecting shell. The cable connector is reasonable in design, simple in structure, good in sealing performance, high in connection reliability, beneficial to prolonging the service life of the cable, and suitable for large-scale popularization, and the cable can be conveniently led in without dismounting.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining equipment, in particular to a mining flameproof power supply quick-connection introduction device. Background Art

[0002] In order to prevent the damage of underground equipment caused by gas explosion in the mine, the explosion-proof equipment for mines generally adopts thicker high-yield strength metal as the explosion-proof shell, and the cable introduction device of the explosion-proof equipment generally adopts a trumpet mouth to insert the cable into the explosion-proof cavity. For example, the patent CN201608031U discloses a signal cable sealing introduction device of an explosion-proof dry-type transformer, which includes a connecting seat, a sealing ring and a clamping pad arranged in the connecting seat, a ferrule is provided at one end of the connecting seat, the sealing ring is located between the ferrule and the clamping pad, a clamping nut is provided at the other end of the connecting seat, the inner wall of the connecting seat is threaded, the outer wall of the clamping nut is threaded, one end of the clamping nut is threadedly connected to the connecting seat, and the other end of the clamping nut is located outside the connecting seat, and the clamping pad is located between the sealing ring and the clamping nut, and holes for assembling signal cables are provided in the ferrule, the sealing ring, the clamping pad and the clamping nut.

[0003] Generally, a cable entry device includes a bell mouth, a gasket, a plug, a sealing ring, and a straight-through joint. However, the problems in actual use of the mine explosion-proof equipment in the form of a bell mouth for the cable entry device are: first, the power cable cannot be quickly connected to the outside of the shell. In the complex environment of the mine, the heavy explosion-proof equipment needs to be opened, and the cable is first connected through the entry device, and then the cable is connected. The construction time is long, the operation is complicated, and the workers need to work under power; second, in the case of removing the shell for wiring, the equipment in the explosion-proof chamber is exposed to negative effects such as coal dust, moisture, and static electricity; third, the cable entry device has limited constraints on the cable after the cable is introduced, and the cable connection end is prone to fatigue damage, which affects its actual service life. Utility Model Content

[0004] In view of the technical problems existing in the above-mentioned cable introduction device, the utility model proposes a mine-use flameproof power quick-connect introduction device which has a reasonable design, a simple structure, is convenient for introducing cables without disassembly, has good sealing performance, has high connection reliability and is beneficial to extending the service life of the cable.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a mine explosion-proof power quick-connect introduction device, including a straight-through joint arranged on the mine explosion-proof equipment, the interior of the straight-through joint is provided with a connecting shell that cooperates with its thread, a nut is provided on the connecting shell, a connector is provided inside the connecting shell, one end of the connector is provided with a plurality of electronic wires, the other end of the connector is provided with a plurality of copper needles corresponding to the electronic wires one by one, the end of the connecting shell is provided with a self-locking part, the self-locking part includes a ring body, the ring body cooperates with a recessed groove arranged at the end of the connecting shell, the ring body is provided with a plurality of wedge-shaped card bodies at the end facing the connector, and the wedge-shaped card bodies cooperate with the axial grooves arranged on the inner wall of the connecting shell.

[0006] Preferably, the specification of the electronic wire is 22awg, and the number of the electronic wire and the copper needles are both 8.

[0007] Preferably, a hemispherical latching protrusion is provided on the side surface of the ring body, and the latching protrusion is engaged with a spherical groove provided on the connecting shell, and the spherical groove penetrates the inner and outer walls of the connecting shell.

[0008] Preferably, the axial cross-section of the wedge-shaped card body is trapezoidal, and the small bottom end of the trapezoid faces the direction of the connector.

[0009] Preferably, a gasket and a sealing ring are provided inside the connector.

[0010] Preferably, a clamping ring is provided at the end of the nut, and the diameter of the clamping ring is larger than the diameter of the connecting shell.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. The mine flameproof power quick-connect introduction device provided by the utility model is designed as an integrated whole with the equipment cables in the cavity. The equipment in the cavity is connected to the outer shell of the mine flameproof equipment in the cavity before leaving the factory, and the equipment is only connected to the mine from the outside. The connection between the equipment and the cable can be completed without opening the mine flameproof equipment, which is convenient, fast, time-saving and labor-saving. Moreover, this quick-connect method can reduce the probability of water ingress (water seepage under the mine), moisture, coal slag and dust in the mine flameproof equipment. At the same time, the self-locking parts are used to brake the cables after wiring to improve their stability and connection reliability. The device has a reasonable design, simple structure, is easy to introduce cables without disassembly, has good sealing, high connection reliability and is conducive to extending the service life of the cable, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A cross-sectional view of a mine flameproof power quick-connect introduction device provided in an embodiment in the DD direction;

[0015] Figure 2 An axonometric diagram of a mine flameproof power quick-connect introduction device provided in an embodiment;

[0016] Figure 3 A front view of a flameproof power quick-connect introduction device for mining provided in an embodiment;

[0017] Figure 4 An axonometric view of a self-locking member provided for an embodiment;

[0018] In the above figures, 1, straight-through joint; 2, connecting shell; 21, countersunk groove; 22, axial groove; 23, spherical groove; 3, nut; 4, connector; 5, electronic wire; 6, copper needle; 7, self-locking part; 71, ring body; 72, wedge-shaped card body; 73, card convex; 8, clamp ring. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] Examples, such as Figures 1 to 4As shown, the utility model provides a mine flameproof power quick-connect introduction device, including a straight-through section 1 arranged on the mine flameproof equipment, the interior of the straight-through section 1 is provided with a connecting shell 2 matched with its thread, and a nut 3 is provided on the connecting shell 2. In order to ensure the flameproof performance of the utility model, it is designed according to the flameproof requirements of underground products, and the wall thickness of the connecting shell 2 is set to 4mm, the thread length is 20mm, and the pitch is 1.5mm; the wall thickness of the connector 4 is set to 4mm, the thread length is 20mm, and the pitch is 1.5mm. The above parameters all meet the flameproof requirements. At the same time, the connecting shell 2 is made of 304 stainless steel, and the stainless steel flameproof wall (straight-through section 1) is encapsulated with epoxy resin to prevent water intrusion from the mine and fix the cable. On this basis, the utility model is provided with a connector 4 inside the connecting shell 2, one end of the connector 4 is provided with a plurality of electronic wires 5, the other end of the connector 4 is provided with a plurality of copper needles 6 corresponding one to one with the electronic wires 5, and the end of the connecting shell 2 is provided with a self-locking part 7, the self-locking part 7 includes a ring body 71, the ring body 71 cooperates with the sink groove 21 provided at the end of the connecting shell 2, the ring body 71 is provided with a plurality of wedge-shaped card bodies 72 at the end thereof facing the connector 4, the wedge-shaped card bodies 72 cooperate with the axial groove 22 provided on the inner wall of the connecting shell 2.

[0022] Specifically, the connector 4 is fixed to the inner wall of the straight-through section 1 through the M24*1.5*20 thread installation; the connecting shell 2, the connector 4 and the straight-through section 1 are connected in sequence and in an orderly manner, especially through the connector 4 and the electronic wire 5 and the copper needle 6 and the cavity equipment cable design to be integrated. In this way, the cavity equipment and the mining explosion-proof equipment shell are connected in the cavity before leaving the factory, and the equipment as a whole only needs to be connected externally when placed under the mine. The effective electrical connection is achieved under the transition of the electronic wire 5 and the copper needle 6 and the intermediate connection. Therefore, it is not necessary to open the mining explosion-proof equipment to complete the connection between the equipment and the cable, that is, the quick connection without disassembly is convenient, fast, time-saving and labor-saving. At the same time, through this quick connection method, there is no need to open the internal environment of the equipment when connecting the cable, so the probability of water inflow (water seepage under the mine), moisture, coal slag, and dust inside the mining explosion-proof equipment can be reduced. Furthermore, the self-locking part 7 is nested with the external cable, and during the installation process, the cable is directly aligned with the connecting shell 2. The ring body 71 squeezes the diameter of the cable close to the port, and the wedge-shaped card body 72 applies pressure to the side of the cable to achieve a certain braking of the cable after wiring, thereby ensuring the stability and connection reliability of the cable after being connected to the device, which is also conducive to extending the service life of the cable.

[0023] In order to improve the electrical connection performance of the cable connected to the explosion-proof equipment for mining through the device, the specification of the electronic wire 5 provided by the utility model is 22awg, the number of the electronic wire 5 and the number of the copper needle 6 are 8, the 8*22awg electronic wire 5 is connected to the equipment in the cavity, and the 8-core copper needle 6 is connected to the outside. In addition to ensuring electrical connectivity by designing a sufficient number of electronic wires 5 and copper needles 6, about the 8 nodes distributed by the electronic wires 5 and the copper needles 6, one of the nodes is eccentrically set, and the other seven are distributed around the node in a nearly C-shaped trajectory, which makes it easy to accurately identify the centering angle to improve the quality of quick connection.

[0024] In order to improve the quick connection performance between the self-locking component 7 and the connecting shell 2, the side of the ring body 71 provided by the utility model is provided with a hemispherical latch 73, and the latch 73 is engaged with the spherical groove 23 provided on the connecting shell 2. The spherical groove 23 runs through the inner and outer walls of the connecting shell 2. The self-locking component 7 can be inserted into the end of the connecting shell 2 together with the cable to be introduced. Accordingly, the latch 73 is completely stuck in the spherical groove 23 after appropriate compression, thereby realizing automatic positioning and having a better anti-slip effect.

[0025] In order to improve the braking effect of the self-locking member 7 on the cable, the wedge-shaped card body 72 provided by the utility model has a trapezoidal axial cross-section and the small bottom end of the trapezoid faces the direction of the connector 4. The large bottom end of the trapezoid faces outward, and when the cable is introduced into the device, the pressure is first small and then large until the extrusion brake is achieved.

[0026] In order to improve the sealing performance of the product, the utility model integrates a gasket and a sealing ring inside the connector 4. In addition to being integrated and assembled before leaving the factory, the gasket and the sealing ring do not need to be frequently disassembled and assembled during service.

[0027] In order to adapt to multi-sheath cables, the utility model provides a clamping ring at the end of the nut 3. The diameter of the clamping ring is larger than the diameter of the connecting shell 2. The outermost sheath of the cable can be inserted into the clamping ring 8 while being connected to the outside of the connecting shell 2. The clamping ring 8 further protects the cable and improves the sealing of the cable connection to a certain extent.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A mine flameproof power supply quick-connect introduction device, comprising a straight-through joint arranged on a mine flameproof device, wherein a connecting shell threadedly matched with the straight-through joint is arranged inside the straight-through joint, and a nut is arranged on the connecting shell, characterized in that: A connector is provided inside the connecting shell, a plurality of electronic wires are provided at one end of the connector, a plurality of copper needles corresponding to the electronic wires are provided at the other end of the connector, a self-locking part is provided at the end of the connecting shell, the self-locking part includes a ring body, the ring body cooperates with a recessed groove provided at the end of the connecting shell, the ring body is provided with a plurality of wedge-shaped card bodies at one end facing the connector, the wedge-shaped card bodies cooperate with an axial groove provided on the inner wall of the connecting shell.

2. The flameproof power quick-connect introduction device for mining use according to claim 1 is characterized in that: The specification of the electronic wire is 22awg, and the number of the electronic wire and the copper needle are both 8.

3. The flameproof power quick-connect introduction device for mining use according to claim 2 is characterized in that: A hemispherical clamping protrusion is arranged on the side surface of the ring body, and the clamping protrusion is clamped with a spherical groove arranged on the connecting shell, and the spherical groove penetrates the inner and outer walls of the connecting shell.

4. The flameproof power quick-connect introduction device for mining use according to claim 3 is characterized in that: The axial cross section of the wedge-shaped card body is trapezoidal, and the small bottom end of the trapezoid faces the direction of the connector.

5. The flameproof power quick-connect introduction device for mining use according to claim 1 is characterized in that: A gasket and a sealing ring are arranged inside the connector.

6. The flameproof power quick-connect introduction device for mining use according to claim 1 is characterized in that: A clamping ring is arranged at the end of the nut, and the diameter of the clamping ring is larger than the diameter of the connecting shell.

Images