Mining flame-proof radio frequency quick connection lead-in device

Abstract

The utility model belongs to the field of mining equipment and facilities, and provides a mining explosion-proof radio frequency quick-connection lead-in device, which comprises an explosion-proof sleeve, a connecting shell in threaded fit with the explosion-proof sleeve is arranged in the explosion-proof sleeve, a nut is arranged on the connecting shell, an epoxy resin body opposite to the connecting shell is arranged in the explosion-proof sleeve, and the epoxy resin body is provided with a nut. A hollow connector is arranged in the connecting shell, an N female-to-SMA-J-1. 5 internal thread needle which penetrates through the epoxy resin body in the circumferential direction is arranged in the center of the connector, a honeycomb drying piece is arranged in the relative space of the connector and the epoxy resin body, and a balance spring is arranged between the honeycomb drying piece and the connector; a plurality of key-shaped grooves distributed in a circular array are formed in the inner wall of the connecting shell, and clamping springs are arranged in the key-shaped grooves. The utility model has the advantages of reasonable design, simple structure, convenient disassembly-free cable introduction and good sealing and drying performance, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The utility model belongs to the field of mining equipment and facilities, in particular to a mining explosion-proof radio frequency quick-connect introduction device. Background Art

[0002] At present, 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-strength metal as the explosion-proof shell, and the cable introduction device of the explosion-proof equipment adopts a trumpet mouth to insert the cable into the explosion-proof cavity. For example, the existing patent CN212485543U discloses a mine explosion-proof wireless antenna introduction device, which includes an explosion-proof sleeve and a sealing clamp, and the radio frequency cable passes through the sealing clamp, the explosion-proof shell and the explosion-proof sleeve, and the explosion-proof sleeve includes an explosion-proof outer sleeve and an explosion-proof inner sleeve, and the explosion-proof inner sleeve and the explosion-proof outer sleeve are connected by explosion-proof threads; the sealing clamp includes a pressure plate, a sealing cylinder and a sealing gasket, and the pressure plate, the sealing cylinder and the sealing gasket are all extended into the explosion-proof shell, and the radio frequency cable passes through the pressure plate, the sealing cylinder, the sealing gasket, the explosion-proof shell and the explosion-proof inner sleeve in turn, and the space between the radio frequency cable and the explosion-proof inner sleeve is filled with epoxy resin.

[0003] Generally, the RF cable introduction device includes a trumpet mouth, a gasket, a plug and a sealing ring, etc., and the problems existing in the actual use of the mine explosion-proof equipment in the form of a trumpet mouth for the cable introduction 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 introduction device. The construction time is long, the operation is complicated, and the workers need to work under power; second, when the shell is removed and the wiring is connected, the equipment in the explosion-proof chamber is exposed to negative effects such as coal dust, moisture, and static electricity. Utility Model Content

[0004] In view of the technical problems existing in the above-mentioned radio frequency cable introduction device, the utility model proposes a mine-use flameproof radio frequency quick-connect introduction device which has a reasonable design, a simple structure, is convenient for introducing cables without disassembly, and has good sealing and drying properties.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a flameproof radio frequency quick-connect introduction device for mining, including a flameproof sleeve arranged on the flameproof equipment for mining, the interior of the flameproof sleeve is provided with a connecting shell threadedly matched with the connecting shell, a nut is provided on the connecting shell, the interior of the flameproof sleeve is provided with an epoxy resin body opposite to the connecting shell, the interior of the connecting shell is provided with a hollow connector, the center of the connector is provided with an N female head to SMA-J-1.5 internal threaded needle circumferentially penetrating the epoxy resin body, a honeycomb drying piece is provided in the relative space between the connector and the epoxy resin body, a balancing spring is provided between the honeycomb drying piece and the connector, and a plurality of key grooves distributed in a circular array are provided on the inner wall of the connecting shell, and a retaining spring is provided in the key groove.

[0006] Preferably, the epoxy resin body is provided with a tapered hole at one end thereof away from the connector, and a sealing plug matched with the end of the flameproof sleeve is provided in the tapered hole.

[0007] Preferably, the sealing plug comprises a conical section, one end of which is provided with an annular section, and the large bottom end of the conical section is larger than the diameter of the annular section.

[0008] Preferably, the connector is in a T-shaped structure, one end of the connector is nested in a sink provided at the end of the honeycomb drying element, and the balance spring is sleeved on the outside of the connector.

[0009] Preferably, the retaining spring has a wave-shaped structure and one end thereof is pin-connected to the connecting shell through a pin.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The mine flameproof RF 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 shell of the mine flameproof equipment before leaving the factory, and the equipment is only connected externally to the mine. The connection between the equipment and the cable can be completed without opening the mine flameproof equipment, which reduces the construction time in the mine and the risk of opening the cover of the flameproof equipment, and avoids the equipment from being exposed to water, dust, and coal slag entering the equipment due to the opening operation; the use of a honeycomb drying piece supported by a balance spring can improve the sealing of this product, and the use of a retaining spring can improve the connection reliability of the device to the introduction cable. The device has a reasonable design, a simple structure, is easy to introduce cables without disassembly, and has good sealing and drying properties, making it suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 A cross-sectional view of the explosion-proof radio frequency quick-connect introduction device for mining provided in the embodiment in the GG direction;

[0014] Figure 2 An axonometric diagram of a mine-use flameproof radio frequency quick-connect introduction device provided in an embodiment;

[0015] Figure 3 A front view of a mine flameproof radio frequency quick-connect introduction device provided in an embodiment;

[0016] In the above figures, 1. Flameproof sleeve; 2. Connecting shell; 3. Nut; 4. Epoxy resin body; 5. Connector; 6. N female to SMA-J-1.5 internal thread needle; 7. Honeycomb drying piece; 8. Balance spring; 9. Key groove; 10. Circlip; 11. Sealing plug. DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] Examples, such as Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a flameproof radio frequency quick-connect introduction device for mining, including a flameproof sleeve 1 arranged on the flameproof equipment for mining, the flameproof sleeve 1 is provided with a connecting shell 2 threadedly matched therewith, and a nut 3 is provided on the connecting shell 2. In order to ensure the flameproof performance of the utility model, the flameproof sleeve 1 and the connecting shell 2 are designed according to the flameproof requirements of underground mine products, and the wall thickness of the flameproof sleeve 1 and the connecting shell 2 is set to 4mm, the thread length is 20mm, and the pitch is 1.5mm. On this basis, the utility model provides an epoxy resin body opposite to the connecting shell 2 inside the flameproof sleeve 1, the epoxy resin body plays the role of a sealing box to fix the cable, a hollow connector 5 is provided inside the connecting shell 2, and an N female head to SMA-J-1.5 internal thread needle 6 is provided at the center of the connector 5, and a honeycomb drying piece 7 is provided in the relative space between the connector 5 and the epoxy resin body. The honeycomb holes and the surface coating of the honeycomb drying piece 7 are made of adsorption material, which mainly absorbs moisture. A balancing spring 8 is provided between the honeycomb drying piece 7 and the connector 5, and a plurality of key grooves 9 distributed in a circular array are provided on the inner wall of the connecting shell 2, and a retaining spring 10 is provided in the key groove 9.

[0020] Specifically, the connecting shell 2, the connector 5 and the flameproof sleeve 1 are connected in order, especially through the connector 5 and the N female head to SMA-J-1.5 internal thread needle 6, which are designed to be integrated with the intracavity equipment cable. In this way, the intracavity equipment and the mining flameproof equipment shell are connected before leaving the factory, and the equipment as a whole only needs to be connected externally when placed under the mine. Under the transition of the N female head to the SMA-J-1.5 internal thread needle 6 and the intermediate connection, an effective electrical connection is achieved, so the connection between the equipment and the cable can be completed without opening the mining flameproof equipment, that is, the quick connection is free of disassembly, which is convenient, fast, time-saving and labor-saving. At the same time, through this quick connection method, the internal environment of the equipment does not need to be opened when connecting the cable, so the probability of water inflow (water seepage under the mine), moisture, coal slag, and dust inside the mining flameproof equipment can be reduced. Further, the use of a honeycomb drying member 7 supported by a balance spring 8 can improve the sealing of this product, and the use of a retaining spring 10 can improve the connection reliability of the device to the introduction cable, which is conducive to extending the service life of the cable.

[0021] In order to improve the sealing performance of the device, in addition to filling with epoxy resin, a tapered hole is provided at the end of the epoxy resin body away from the connector 5, and a sealing plug is provided in the tapered hole to match the end of the flameproof sleeve 1. Furthermore, the sealing plug includes a tapered section, and an annular section is provided at one end of the tapered section, and the large bottom end of the tapered section is larger than the diameter of the annular section. In this way, under the back seat of the sealing plug, the sealing surface area formed by the epoxy resin body around it is relatively large and has good stability, which helps to improve the sealing and waterproof performance of this product.

[0022] In order to improve the balance of the connector 5, the balance spring 8 and the honeycomb drying element 7, the connector 5 provided by the utility model is in a T-shaped structure, one end of the connector 5 is nested with the sink groove arranged at the end of the honeycomb drying element 7, and the balance spring 8 is sleeved on the outside of the connector 5. The three are nested with each other, and under the condition of maintaining a certain dynamic balance, the honeycomb drying element 7 absorbs the moisture entering from the surrounding gaps, thereby improving the dryness of the internal environment of the product.

[0023] In order to improve the braking effect of the retaining spring 10 on the introduced cable, the retaining spring 10 provided by the utility model has a wavy structure, and the end of the wave extends in a wavy shape in the direction of the connector 5. The wavy track retaining spring 10 can produce appropriate compression under pressure and maintain a tendency of automatic recovery within a certain limit, thereby achieving reasonable clamping and braking, and its head end establishes a connection relationship with the connecting shell 2 through a pin in a quick pin connection manner.

[0024] 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 radio frequency quick-connect introduction device, comprising a flameproof sleeve arranged on a mine flameproof device, wherein a connecting shell threadedly matched with the flameproof sleeve is arranged inside the flameproof sleeve, and a nut is arranged on the connecting shell, characterized in that: An epoxy resin body opposite to the connecting shell is arranged inside the flameproof sleeve, a hollow connector is arranged inside the connecting shell, an N female to SMA-J-1.5 internal thread needle circumferentially penetrating the epoxy resin body is arranged at the center of the connector, a honeycomb drying piece is arranged in the relative space between the connector and the epoxy resin body, a balancing spring is arranged between the honeycomb drying piece and the connector, and a plurality of key grooves distributed in a circular array are arranged on the inner wall of the connecting shell, and a retaining spring is arranged in the key groove.

2. The explosion-proof radio frequency quick-connect introduction device for mining according to claim 1 is characterized in that: The epoxy resin body is provided with a tapered hole at one end thereof away from the connector, and a sealing plug matched with the end of the flameproof sleeve is provided in the tapered hole.

3. The explosion-proof radio frequency quick-connect introduction device for mining according to claim 2 is characterized in that: The sealing plug comprises a conical section, one end of which is provided with an annular section, and the large bottom end of the conical section is larger than the diameter of the annular section.

4. The explosion-proof radio frequency quick-connect introduction device for mining according to claim 3 is characterized in that: The connector is in a T-shaped structure, one end of the connector is nested in a sink arranged at the end of the honeycomb drying element, and the balance spring is sleeved on the outside of the connector.

5. The explosion-proof radio frequency quick-connect introduction device for mining according to claim 4 is characterized in that: The clamping spring has a wave-shaped structure and one end thereof is pin-connected with the connecting shell through a pin.

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