CN112993653A - Three-proofing aviation connector for coal mine and manufacturing method thereof - Google Patents

Abstract

The invention discloses a three-proofing aviation connector for a coal mine, which comprises a protection piece and a sealing device, wherein the protection piece is provided with an internal space for accommodating a wiring row socket; the sealing device is connected to the protecting piece to seal the inner space of the protecting piece with the outside; and the sealing device is provided with a threading through hole for the explosion-proof cable to pass through in a sealing way. The manufacturing method comprises the following steps: the explosion-proof cable penetrates through a threading through hole in the sealing device in a sealing mode and is connected with the wiring extension socket; step two: placing a wiring row in the inner space of the protective element sleeve; step three: the sealing device is connected with the protection piece in a sealing mode, so that the wiring extension socket is sealed in the inner space of the protection piece. The invention can prevent water, dust and collision, has intrinsic safety and explosion-proof functions, and can adapt to severe environments of multiple falling rocks and falling coal under coal mines.

Description

Three-proofing aviation connector for coal mine and manufacturing method thereof

Technical Field

The invention relates to the technical field of aviation connectors, in particular to a three-proofing aviation connector for a coal mine and a manufacturing method of the three-proofing aviation connector.

Background

The aviation connector is also called an aviation plug, is widely applied to various electric circuits and plays a role in connecting or disconnecting circuits. The automatic drilling machine for the coal mine has poor underground working condition, is easy to be corroded by water vapor and is polluted by dust. When the aviation connector is used underground, impact, corrosion, oxidation, corrosion, water vapor entering and the like are easy to occur, so that the aviation connector is poor in contact and short in service life, and the normal work of an automatic drilling machine is seriously influenced. Therefore, the aviation connector for the automatic drilling machine has the advantages that the protection grade of the aviation connector for the automatic drilling machine must be improved, the aviation connector is guaranteed to have waterproof, dustproof and anti-collision functions, and the aviation connector has high reliability and stability.

Anhui golden blue flame cable Limited company, (CN111029840A) provides an aviation cable joint with excellent sealing performance, which belongs to the technical field of cable joints and comprises a male head shell and a female head shell, wherein a connecting sealing gasket and a third sealing ring are fixed between the male head shell and the female head shell, an inner shell and an outer shell are fixed outside the male head shell and the female head shell, second sealing rings are fixed between the male head shell and the female head shell and between the female head shell and the outer shell, and a first sealing ring is fixed between the outer shell and the inner shell. The cable joint is used for solving the technical problems that the existing aviation cable joint is poor in sealing performance, dust or oil dirt easily enters the interior of the cable joint, the joint is unstable and easy to loosen, and the like, but the cable joint is complex in structure, multiple in components, large in size, not beneficial to underground field dismounting and maintenance, free of an explosion-proof function and not suitable for underground coal mines.

Shijiazhuang Ouyang Electron science and technology Limited, (CN207732214U) provides a novel aviation plug, including aviation plug, aviation socket, mount pad and plug dustcoat, the plug dustcoat is established to the aviation plug overcoat, the aviation plug with be equipped with relative rotation device between the plug dustcoat, the aviation plug is inserted and is established on the aviation socket, the aviation socket cover is established inside the mount pad, the draw-in groove of seting up on the plug dustcoat can with the spring buckle that sets up on the mount pad cooperatees, locks aviation plug and aviation socket. The utility model discloses a connected mode is simple and rapid, convenient operation, and the prepositioning device of its setting can also be pulling out the in-process at utmost protection contact pin of inserting, but its sealing performance is not good enough, inside dust and greasy dirt etc. easily enter the plug, and do not possess explosion-proof function, also can't be applicable to the operational environment in the pit in the colliery.

Therefore, in order to solve the above problems, a three-proofing aviation connector for a coal mine and a manufacturing method thereof are needed, which can be applied to the underground coal mine and have the advantages of simple structure, and waterproof, dustproof, anti-collision and explosion-proof performances.

Disclosure of Invention

In view of the above, the present invention aims to overcome the defects in the prior art, and provides a three-proofing aviation connector for coal mines and a manufacturing method thereof, which can prevent water, dust, collision and explosion, and can adapt to severe environments with multiple rockfall and coal breakage in coal mines.

The three-proofing aviation connector for the coal mine comprises a protection piece and a sealing device, wherein the protection piece is provided with an internal space for accommodating a wiring row socket; the sealing device is connected to the protection piece to enable the inner space to form a seal with the outside; and the sealing device is provided with a threading through hole for the explosion-proof cable to pass through in a sealing way. The wiring row socket is sealed in the protective piece through the sealing connection of the sealing device and the protective piece, the sealing performance is reliable, and dust, oil stains and the like can not enter the plug in use; the explosion-proof cable is fixed with the sealing device and is fixed on the protection piece after being installed, so that the stable connection of the wiring row plug can be ensured; the coal mine underground falling rock explosion-proof device is simple in structure, few in components, has an explosion-proof function, is suitable for the severe environment of multiple falling rocks and falling coals in a coal mine, and is beneficial to field disassembly and maintenance.

Furthermore, the threading through hole is positioned on the explosion-proof sealing plug, and a sealing counter bore is arranged on the axial inner side of the threading through hole; the explosion-proof cable penetrates through the sealing counter bore, sealing filler is arranged between the explosion-proof cable and the sealing counter bore, and the sealing filler is tensioned with the hole wall of the threading hole and the cable; and a sealing ring is arranged between the sealing device and the protection piece. The sealing filler is tightly matched with the explosion-proof cable, so that the explosion-proof cable can be firmly clamped, and the effects of secondary sealing, water resistance and dust prevention are achieved; the sealing ring seals a gap between the protection piece and the sealing device so as to ensure the sealing property.

Further, still be equipped with the installation annular on the explosion-proof sealing plug, the sealing washer is with installation annular joint. The sealing device can prevent the sealing ring from influencing the sealing performance due to the friction force movement when the explosion-proof sealing plug is installed.

Further, be equipped with the injecting glue hole on the axial outside of threading via hole, explosion-proof cable passes the injecting glue hole, the injecting glue downthehole packing has sealed glue. The sealant has good structural bonding capacity, so that the explosion-proof cable penetrating through the glue injection hole is bonded with the sealing device into a whole, and meanwhile, the sealant has the characteristics of water resistance, dust resistance, flame retardance, explosion resistance, chemical corrosion resistance, vibration reduction, wear resistance and the like, and can realize the effects of primary sealing, water resistance, dust resistance and cinder resistance.

Further, still include the retaining member, the retaining member will sealing device fastens on the protective member, further fixes sealing device, guarantees its sealed, explosion-proof effect.

Furthermore, the explosion-proof sealing plug is provided with a clamping table which is abutted against the protection piece; the locking piece is provided with a pressing ring, and the pressing ring presses the clamping table on the protection piece.

Furthermore, retaining member and protection piece threaded connection, the dismantlement and the installation of the retaining member of being convenient for.

The manufacturing method of the three-proofing aviation connector for the coal mine comprises the following steps:

the method comprises the following steps: the explosion-proof cable penetrates through a threading through hole in the sealing device in a sealing mode and is connected with the wiring extension socket;

step two: placing a wiring row in the inner space of the protective element sleeve; meanwhile, the male end and the female end of the wiring board are plugged, so that the two ends of the wiring board are communicated;

step three: the sealing device is connected with the protection piece in a sealing mode, so that the wiring extension socket is sealed in the inner space of the protection piece.

Further, the first step specifically comprises:

(1) the explosion-proof cable sequentially passes through the sealing counter bore, the threading through hole and the glue injection hole; the sealing filler is arranged between the sealing counter bore and the explosion-proof cable, so that the explosion-proof cable is fixed and sealed;

(2) a sealing ring is arranged between the sealing device and the protection piece;

(3) and filling sealant into the glue injection hole to fill the space between the glue injection hole and the explosion-proof cable with the sealant.

Further, before the first step, performing chromium plating treatment on the surfaces of the protecting piece, the sealing device and the locking piece;

the method also comprises the following four steps: the locking piece fixes the sealing device on the protection piece and is detachably and fixedly connected with the protection piece.

The invention has the beneficial effects that:

(1) the invention seals the wiring extension socket in the protective piece and the sealing device, has less components, simple structure and small volume, and is beneficial to disassembly, assembly and maintenance under a coal mine;

(2) the explosion-proof sealing plug is tightly matched with the explosion-proof cable, so that the effects of secondary sealing, water resistance and dust resistance can be achieved, and meanwhile, the explosion-proof cable is fixed; the sealant in the glue injection hole enables the explosion-proof cable and the sealing device to be bonded into a whole, and meanwhile, the cable has the characteristics of water resistance, dust resistance, flame retardance, explosion resistance, chemical corrosion resistance, vibration reduction, wear resistance and the like, and the effects of primary sealing, water resistance, dust resistance and cinder resistance can be realized; dust, oil stain and the like can not enter the sealing device, and the sealing is reliable;

(3) the locking piece fixes the sealing device on the protection piece to prevent the sealing device from loosening; the explosion-proof cable and the sealing device are bonded into a whole, so that the connection looseness of the wiring extension socket can be prevented, and meanwhile, the contact pin of the wiring extension socket is protected;

(4) the surfaces of the protecting piece, the sealing device and the locking piece are subjected to chromium plating treatment, so that the corrosion resistance, the rust prevention and the oxidation resistance of the protecting piece, the sealing device and the locking piece can be improved, and the service life is prolonged.

(5) The invention can realize the effects of primary sealing, water prevention, dust prevention and cinder prevention by adopting fewer components, has higher reliability and stability and is suitable for underground coal mines.

Drawings

FIG. 1 is a schematic structural diagram of a three-proofing aircraft joint for coal mines according to the invention;

FIG. 2 is a cross-sectional view of a three-proofing aircraft joint for coal mines according to the present invention;

FIG. 3 is a schematic structural diagram of a sealing device in a three-proofing aviation connector for coal mines according to the invention;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic structural view of a locking piece in the three-prevention aviation connector for the coal mine;

fig. 6 is a cross-sectional view of fig. 5.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that the terms "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is intended to facilitate the description of the invention and simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular manner, and thus should not be considered as limiting the invention.

In the three-proofing aviation connector for coal mines, as shown in fig. 1, 2, 3 and 4, the protection piece 5 is provided with an inner space 5-1 for accommodating the wiring extension socket 3. The wiring extension socket 3 is arranged in the inner space 5-1, and the sealing device 1 is connected with the protection piece 5 to seal the inner space 5-1 with the outside. And the sealing device 1 is provided with threading holes 1-24 for the explosion-proof cable 2 to pass through in a sealing way, and the explosion-proof cable 2 connected with the wiring extension socket 3 extends out of the threading holes 1-24. Preferably, the explosion-proof cable 2 is an intrinsic safety explosion-proof cable, and the wiring board 3 is an intrinsic safety explosion-proof board, so as to have intrinsic safety explosion-proof function.

Further, the threading hole 1-24 is positioned on the explosion-proof sealing plug 1-2, the axial inner side 1-24b of the threading hole 1-24 is provided with a sealing counter bore 1-22, preferably, the sealing counter bore 1-22 is a stepped hole and is coaxially arranged with the threading hole 1-24, and the stepped hole can facilitate the installation of the sealing packing 1-4. The explosion-proof cable 2 sequentially penetrates through the sealing counter bores 1-22 and the threading through holes 1-24, and the sealing filler 1-4 is arranged between the explosion-proof cable 2 and the sealing counter bores 1-22. The sealing filler 1-4 is tightly tensioned with the hole wall of the threading hole and the explosion-proof cable 2, so that the explosion-proof cable 2 can be prevented from moving after being installed, and meanwhile, the effect of sealing a gap between the threading hole and the explosion-proof cable is achieved. A sealing ring 1-1 is arranged between the sealing device 1 and the protection piece 5.

For the convenience of installation, the periphery of the sealing device 1 is provided with an installation ring groove 1-21, and the sealing ring 1-1 is clamped in the installation ring groove 1-21. When the sealing device 1 is installed, the problem of poor sealing performance caused by rolling displacement of the sealing ring 1-1 due to the friction force between the sealing ring 1-1 and the protection piece 5 can be prevented.

Further, as shown in fig. 4, glue injection holes 1-23 are formed in the axial outer sides 1-24a of the threading holes 1-24, and preferably, the threading holes 1-24 are coaxial with the glue injection holes 1-23. After the explosion-proof cable 2 sequentially passes through the sealing counter bores 1-22, the threading through holes 1-24 and the glue injection holes 1-23, the glue injection holes 1-23 are filled with sealing glue 1-3. The sealant 1-3 has good structural bonding capability, so that the explosion-proof cable 2 penetrating through the sealant injection holes 1-23 can be bonded with the sealing device 1 into a whole, the internal space 5-1 of the protection piece has the characteristics of water resistance, dust resistance, flame retardance, explosion resistance, chemical corrosion resistance, vibration reduction, wear resistance and the like, and the effects of primary sealing, water resistance, dust resistance and cinder resistance can be realized.

Further, as shown in fig. 5 and 6, the locking device 4 is further included, the locking device 4 includes a connecting portion 4-1, and one end of the connecting portion 4-1 is provided with a pressing ring 4-2. The explosion-proof sealing plug 1-2 is provided with a clamping table 1-26 which is abutted against the protection piece 5. After the connecting part 4-1 of the locking piece 4 is connected with the protecting piece 5, the clamping table 1-26 is tightly pressed on the port of the protecting piece 5 by the pressing ring 4-2. So as to achieve the purpose of further sealing and fixing the explosion-proof sealing plug 1-2.

Further, the protection member 5 is of a cylindrical shell structure, and two ends of the protection member 5 are provided with a sealing device 1. Preferably, the sealing filler 1-4 is intrinsically safe and explosion-proof rubber, so that the sealing device 1 has the intrinsically safe and explosion-proof functions while being waterproof, dustproof and capable of preventing physical impact. The connecting part 4-1 is provided with an internal thread, and the protecting part 5 is provided with an external thread matched with the locking part 4. The outer contours of the radial cross sections of the protecting piece 5 and the locking piece 4 are both polygonal, preferably hexagonal structures, the structures are convenient for rotating the locking piece 4, and the locking piece 4 is easy to mount and dismount.

In order to improve the functions of corrosion resistance, rust resistance and oxidation resistance and prolong the service life, the surfaces of the protecting piece 5, the sealing device 1 and the locking piece 4 need to be subjected to chromium plating treatment. Furthermore, in order to prevent the mechanical damage to the extension socket 3 caused by the physical impact of rock falling, coal falling and the like in the underground drilling field, the protecting piece 5 and the locking piece 4 are both made of steel structures so as to ensure reliable sealing and explosion-proof performance.

The manufacturing method of the three-proofing aviation connector for the coal mine comprises the following steps: the surfaces of the protection 5, the sealing device 1 and the locking element 4 are first subjected to a chromium plating treatment.

The method comprises the following steps:

(1) the explosion-proof cable 2 sequentially passes through the sealing counter bores 1-22, the threading through holes 1-24 and the glue injection holes 1-23, and the sealing filler 1-4 is arranged between the sealing counter bores 1-22 and the explosion-proof cable 2. The sealing filler 1-4 is tightly matched with the explosion-proof cable 2, namely the sealing filler 1-4 is tightly tensioned with the explosion-proof cable 2 and the inner walls of the sealing counter bores 1-22;

(2) the outer side of the sealing device 1 is provided with an installation ring groove 1-21 for placing a sealing ring 1-1, and the sealing ring 1-1 is clamped with the installation ring groove 1-21;

(3) and filling the sealant 1-3 into the sealant injection holes 1-23, so that the sealant 1-3 is filled in the space between the sealant injection holes 1-23 and the explosion-proof cable 2, and the explosion-proof cable 2 and the sealing device 1 are bonded into a whole through the sealant 1-3.

Step two: the wiring extension socket 3 is arranged in the inner space 5-1 of the protective piece 5 sleeve for connection, and meanwhile, the male end and the female end of the wiring extension socket are connected in an inserting mode, so that the two ends of the wiring extension socket are communicated.

Step three: one end of the explosion-proof sealing plug 1-2 is plugged into the end part of the protection piece 5, so that the sealing counter bores 1-22 are positioned in the protection piece 5, the clamping platforms 1-26 are abutted against the end part of the protection piece 5, and meanwhile, the sealing ring 1-1 seals a gap between the sealing device 1 and the protection piece 5. The terminal block 3 is sealed in the protector 5.

Step four: the connecting part 4-1 of the locking piece 4 is screwed at the end part of the protection piece 5, and the clamping table 1-26 is tightly pressed at the end part of the protection piece 5 by the pressing ring 4-2.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. Three proofings aviation joint for coal mine, its characterized in that: the protection device comprises a protection piece and a sealing device, wherein the protection piece is provided with an inner space for accommodating a wiring row socket; the sealing device is connected to the protection piece to enable the inner space to form a seal with the outside; and the sealing device is provided with a threading through hole for the explosion-proof cable to pass through in a sealing way.

2. The three-proofing air connector for coal mines as set forth in claim 1, wherein: the threading through hole is positioned on the explosion-proof sealing plug, and a sealing counter bore is arranged on the axial inner side of the threading through hole; the explosion-proof cable penetrates through the sealing counter bore, sealing filler is arranged between the explosion-proof cable and the sealing counter bore, and the sealing filler is tensioned with the hole wall of the threading hole and the cable; and a sealing ring is arranged between the sealing device and the protection piece.

3. The three-proofing air connector for coal mines as set forth in claim 2, wherein: and the explosion-proof sealing plug is also provided with an installation ring groove, and the sealing ring is clamped with the installation ring groove.

4. The three-proofing air connector for coal mines as set forth in claim 1, wherein: the anti-explosion cable is characterized in that a glue injection hole is formed in the axial outer side of the threading through hole, the anti-explosion cable penetrates through the glue injection hole, and sealant is filled in the glue injection hole.

5. A three-proofing air connector for coal mines according to any one of claims 1 to 4, wherein: further comprising a retaining member that secures the sealing device to the protective member.

6. The three-proofing air connector for coal mines as set forth in claim 5, wherein: the explosion-proof sealing plug is provided with a clamping table which is abutted against the protection piece; the locking piece is provided with a pressing ring, and the pressing ring presses the clamping table on the protection piece.

7. The three-proofing air connector for coal mines as set forth in claim 6, wherein: the locking member is in threaded connection with the protection member.

8. The manufacturing method of the three-proofing aviation connector for the coal mine is characterized by comprising the following steps of:

the method comprises the following steps: the explosion-proof cable penetrates through a threading through hole in the sealing device in a sealing mode and is connected with the wiring extension socket;

step two: placing the wiring extension socket in the inner space of the protective element sleeve, and simultaneously inserting the male end and the female end of the wiring extension socket to realize the communication of the two ends of the wiring extension socket;

step three: the sealing device is connected with the protection piece in a sealing mode, so that the wiring extension socket is sealed in the inner space of the protection piece.

9. The method for manufacturing the three-proofing aviation connector for the coal mine according to claim 8, wherein: the first step further comprises:

(1) the explosion-proof cable sequentially passes through the sealing counter bore, the threading through hole and the glue injection hole; the sealing filler is arranged between the sealing counter bore and the explosion-proof cable, so that the explosion-proof cable is fixed and sealed;

(2) a sealing ring is arranged between the sealing device and the protection piece;

(3) and filling sealant into the glue injection hole to fill the space between the glue injection hole and the explosion-proof cable with the sealant.

10. A method for manufacturing a three-proofing air connector for a coal mine according to any one of claims 8 or 9, wherein:

before the first step, performing chromium plating treatment on the surfaces of the protecting piece, the sealing device and the locking piece;

the method also comprises the following four steps: the locking piece fixes the sealing device on the protection piece and is detachably and fixedly connected with the protection piece.

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