A kind of explosion-proof controllable power on-off quick connector for underground coal mines

Abstract

The present invention relates to the technical field of quick connectors, and specifically to an explosion-proof controllable power on-off quick connector for underground coal mines, comprising a connector member, wherein the connector member comprises a female connector and a male connector, and the male connector is located on the outside away from one end of the female connector, and is characterized in that the connecting structure is fixedly installed on the outside of the male connector, and the connecting structure is used to connect the female connector and the male connector, and the connecting structure comprises a connecting sleeve, and the connecting sleeve is fixedly installed on the outside of the male connector, and a guide unit is fixedly installed on the outside of the male connector; a limiting column is inserted into the interior of the base so that the disc is not affected by the rotation of the rotating shaft, and when the ratchet and the ratchet are matched together, the ratchet can only rotate in one direction, and will be blocked by the ratchet when rotating in the opposite direction. This design helps to achieve unidirectional movement of the rack when the rack and the circular gear are meshed through teeth, thereby improving the stability and reliability of the male connector inserted into the interior of the female connector.

Description

Technical Field

[0001] The invention relates to the technical field of quick connectors, in particular to an explosion-proof controllable power on / off quick connector for underground coal mines. Background Art

[0002] The cables in coal mines are the power transmission devices of underground equipment. Under the strict control of coal mine explosion-proof requirements, how to achieve quick connection between cables is the key to reducing the labor intensity of workers and improving underground work efficiency. Therefore, a quick connector is needed to connect the two sections of cable together. The quick connector is an accessory for connecting between products. The use of quick connectors can achieve seamless connection between products.

[0003] When connecting the existing quick connector, it is necessary to detach the sliding sleeve of the female connector from the outside of the steel ball of the female connector, and then when the male connector is inserted into the female connector, release the sliding sleeve and squeeze it with the spring so that the sliding sleeve squeezes the steel ball inside the female connector. At this moment, the steel ball is engaged in the circular arc groove inside the male connector, so that the male and female connectors are connected. However, after the two sections of the cable are connected through their connectors in this way, when the two sections of the cable are shaken by external influences, the steel ball of the female connector rotates irregularly in the circular arc groove inside the male connector, resulting in unstable electrical connection, thereby affecting the stability of power transmission. In addition, the irregular rotation between the male and female connectors causes wear or poor contact of the contacts, which damages the connector components in the long run, requiring more frequent maintenance and replacement, thereby reducing the service life of the connector.

[0004] In view of this, the present invention proposes an explosion-proof controllable power on / off quick connector for underground coal mines to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an explosion-proof controllable power on-off quick connector for underground coal mines, which solves the technical problem that when two sections of cables are shaken by external influences, irregular rotation occurs between the male and female connectors, resulting in wear or poor contact of the contacts, which in the long run damages the connector components and requires more frequent maintenance and replacement, thereby reducing the service life of the connector.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The technical solution adopted by the present invention to solve its technical problems is an explosion-proof controllable power on-off quick connector for underground coal mines, including a connector part, wherein the connector part includes a female connector and a male connector, and the male connector is located on the outside away from one end of the female connector, and is characterized in that the connecting structure is fixedly installed on the outside of the male connector, and the connecting structure is used to connect the female connector and the male connector, and the connecting structure includes a connecting sleeve, and the connecting sleeve is fixedly installed on the outside of the male connector, and a guide unit is fixedly installed on the outside of the male connector, and an engaging unit is fixedly installed inside the female connector, and a reset unit is fixedly installed inside the engaging unit, and the engaging unit is fixedly installed inside. A limit ring is fixedly installed on the outer side of the unit, a limit column is inserted into the interior of the meshing unit, a locking unit is sleeved on the outer side of the meshing unit, the meshing unit includes a base, and the base is fixedly installed inside the female joint, a rotating shaft 1 is inserted into the interior of the base, the locking unit includes a disc, and the disc is sleeved on the outer side of the rotating shaft 1, a ratchet is fixedly installed on the outer side of the rotating shaft 1, a rotating shaft 2 is fixedly installed on the top of the disc, and a ratchet is sleeved on the outer side of the rotating shaft 2, a spring 2 is fixedly installed on the outer side of the ratchet, and a fixing plate is fixedly installed on the other end of the spring 2, and the fixing plate is fixedly installed on the top of the disc.

[0008] Preferably, the guide unit comprises a guide piece, and the guide piece is fixedly mounted on the outside of the male connector, and a guide groove is provided inside the female connector.

[0009] Preferably, one end of the guide piece is in an inclined structure, and the inner diameter of the guide groove is matched with the outer diameter of the guide piece.

[0010] Preferably, eight groups of guide plates and guide grooves are arranged at equal distances, and the eight groups of guide plates and guide grooves are distributed in an array around the central axis of the female connector.

[0011] Preferably, the reset unit includes a spring 1, and the spring 1 is fixedly installed inside the base, a gasket is fixedly installed on the top of the spring 1, and a fixing column is fixedly installed on the top of the gasket.

[0012] Preferably, a rotation groove matched with the fixing column is provided inside the rotating shaft 1.

[0013] Preferably, an extrusion structure is sleeved on the outer side of the female connector, and the extrusion structure includes a sliding cylinder, the sliding cylinder is sleeved on the outer side of the female connector, a spring three is inserted inside the sliding cylinder, and a support ring two is fixedly installed on the outer side of the female connector.

[0014] Preferably, the outer diameter of the support ring 2 is matched with the inner diameter of the sliding cylinder at two-thirds.

[0015] Preferably, the inner diameter of the sliding cylinder at one third of the length is matched with the outer diameter of the connecting sleeve, and the top end of the rotating shaft 1 is in an arc-shaped structure.

[0016] Preferably, a sealing structure is embedded in one end of the female connector, and the sealing structure includes a rubber strip, the rubber strip is embedded in the interior of the female connector, a sealing ring 1 is fixedly installed at one end of the rubber strip, and a cavity 1 is provided inside the sealing ring 1, and a cavity 2 is opened inside the sealing ring 1.

[0017] The beneficial effects of the present invention are:

[0018] (1) In the present invention, the limiting column is inserted into the interior of the base so that the disc is not affected by the rotation of the rotating shaft, and when the ratchet wheel and the ratchet teeth are matched together, the ratchet wheel can only rotate in one direction, and will be blocked by the ratchet teeth when rotating in the opposite direction. This design helps to achieve unidirectional movement of the rack when the rack and the circular gear are meshed through the teeth, thereby improving the stability and reliability of the male connector inserted into the female connector.

[0019] (2) In the present invention, the guide piece is inserted into the guide groove through an inclined surface, which reduces the resistance when the guide piece is inserted into the guide groove, facilitates positioning, reduces the risk of damage, and improves the efficiency of the connection between the female connector and the male connector. When the guide piece is fully inserted into the guide groove, the stability of the connection between the female connector and the male connector is improved.

[0020] (3) In the present invention, the rotating shaft 1 is squeezed by the sliding cylinder, so that the rotating shaft 1 sinks inside the base, thereby separating the teeth of the circular gear and the rack, so that the male connector separates the inside of the female connector. This method is conducive to quickly cutting off the current and reducing the occurrence of accidents such as electric shock and fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front perspective schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic top view of the structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the AA section structure;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of the middle BB section;

[0025] Figure 5 It is an exploded three-dimensional schematic diagram of the structure of the connecting sleeve and the sliding cylinder of the present invention;

[0026] Figure 6 It is an exploded three-dimensional schematic diagram of the structure of the guide piece and the spring three of the present invention;

[0027] Figure 7 It is a front perspective schematic diagram of the structure of the base and the rotating shaft 1 of the present invention;

[0028] Figure 8 It is a schematic exploded perspective view of a partial cross section of the structure of the base and the circular gear of the present invention;

[0029] Fig. 9 It is a three-dimensional schematic diagram of the structural splicing state of the female connector and the male connector of the present invention;

[0030] Fig.10 For the present invention Fig. 9 A schematic diagram of a front cross-sectional perspective view of the structure.

[0031] In the figure:

[0032] 1. Connectors;

[0033] 110, female connector; 120, male connector;

[0034] 2. Connection structure;

[0035] 210, connecting sleeve; 220, guiding unit; 230, supporting ring 1; 240, engaging unit; 250, resetting unit; 260, limiting ring; 270, limiting column; 280, locking unit;

[0036] 221, guide piece; 222, guide groove;

[0037] 241, base; 242, rotating shaft 1; 243, circular gear; 244, rack;

[0038] 251, spring 1; 252, gasket; 253, fixing column;

[0039] 281, disc; 282, ratchet; 283, second rotating shaft; 284, ratchet; 285, second spring; 286, fixed plate;

[0040] 3. Extrusion structure;

[0041] 310, sliding cylinder; 320, spring three; 330, support ring two;

[0042] 4. Sealing structure;

[0043] 410, rubber strip; 420, sealing ring 1; 430, cavity 1; 440, cavity 2;

[0044] 5. Sealing ring 2. DETAILED DESCRIPTION

[0045] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] Example 1

[0047] like Figure 1-Figure 8 As shown, an underground explosion-proof controllable power on-off quick connector for coal mines of the present invention comprises a connector 1, the connector 1 comprises a female connector 110 and a male connector 120, the male connector 120 is located on the outside away from one end of the female connector 110, the female connector 110 and the male connector 120 both comprise a housing and a connector component, a connecting structure 2 is fixedly mounted on the outside of the male connector 120, and the connecting structure 2 is used to connect the female connector 110 with the male connector 120;

[0048] The connection structure 2 includes a connection sleeve 210, and the connection sleeve 210 is fixedly installed on the outer side of the male connector 120, a guide unit 220 is fixedly installed on the outer side of the male connector 120, a support ring 230 is fixedly installed on the outer side of the female connector 110, and the support ring 230 is located on the outer side of the female connector 110 near one end of the male connector 120, an engagement unit 240 is fixedly installed inside the female connector 110, and a reset unit 250 is fixedly installed inside the engagement unit 240, a limit ring 260 is fixedly installed on the outer side of the engagement unit 240, a limit column 270 is inserted inside the engagement unit 240, a locking unit 280 is sleeved on the outer side of the engagement unit 240, and the locking unit 280 is fixedly installed just above the limit column 270, and the locking unit 280 is connected to the engagement unit 240 through the limit column 270;

[0049] The meshing unit 240 includes a base 241, and the base 241 is fixedly installed inside the female connector 110, a rotating shaft 242 is inserted inside the base 241, a circular gear 243 is fixedly installed outside the rotating shaft 242, a rack 244 is fixedly installed on the inner wall of the connecting sleeve 210, the circular gear 243 and the rack 244 are meshed through teeth, and the cross section of the rotating shaft 242 is an inverted "T" shaped structure;

[0050] The locking unit 280 includes a disc 281, and the disc 281 is sleeved on the outer side of the rotating shaft 1 242. A rotating groove compatible with the limiting ring 260 is opened inside the disc 281. The disc 281 is sleeved on the outer side of the limiting ring 260. The disc 281 is fixedly installed on the top of the limiting column 270. A ratchet 282 is fixedly installed on the outer side of the rotating shaft 1 242, and the ratchet 282 is located directly above the disc 281. A rotating shaft 283 is fixedly installed on the top of the disc 281, and a ratchet 284 is sleeved on the outer side of the rotating shaft 283. A spring 285 is fixedly installed on the outer side of the ratchet 284, and a fixing plate 286 is fixedly installed on the other end of the spring 285. The fixing plate 286 is fixedly installed on the top of the disc 281, and the ratchet 284 is engaged with the teeth of the ratchet 282.

[0051] In this embodiment, when the male connector 120 is inserted into the interior of the female connector 110, at this moment, the connecting sleeve 210 follows the moving sleeve of the male connector 120 and is arranged on the outer side of the support ring 230. The support ring 230 supports the connecting sleeve 210, so that the male connector 120 is stably inserted into the interior of the female connector 110. At the same time, the connecting sleeve 210 drives the rack 244 to mesh with the circular gear 243 through the teeth, and then the cross-section of the rotating shaft 242 is an inverted "T" shape structure, so that the circular gear 243 drives the rotating shaft 242 to stably rotate inside the base 241 and outside the fixed column 253. At this moment, the ratchet 282 rotates with the rotating shaft 242, and the disc 281 is inserted into the interior of the base 241 through the limiting column 270, so that the disc 281 does not follow As the shaft 242 rotates, the disc 281 is sleeved on the outer side of the shaft 242 through the limiting ring 260, so that the distance between the disc 281 and the ratchet 282 is in a stable state, preventing the ratchet 284 from disengaging from the teeth of the ratchet 282, and then through the elastic force of the spring 285 and the limiting of the teeth of the ratchet 282 by the ratchet 284, the ratchet 282 can only rotate in one direction, and will be blocked by the ratchet 284 when rotating in the opposite direction. This structure helps to achieve unidirectional movement of the rack 244 when the rack 244 and the circular gear 243 are meshed through the teeth, thereby improving the stability and reliability of the male connector 120 being inserted into the female connector 110, thereby preventing the female connector 110 and the connector parts inside the male connector 120 from being damaged by irregular rotation of the axis of the female connector 110.

[0052] Example 2

[0053] like Figure 3-Figure 6 As shown, on the basis of Example 1, the guide unit 220 includes a guide piece 221, and the guide piece 221 is fixedly installed on the outside of the male connector 120, and a guide groove 222 is opened inside the female connector 110, and one end of the guide piece 221 is in an inclined structure, and the inner diameter of the guide groove 222 is adapted to the outer diameter of the guide piece 221, so that the guide piece 221 can be inserted into the inside of the guide groove 222, and eight groups of guide pieces 221 and guide grooves 222 are arranged at equal distances, and the eight groups of guide pieces 221 and guide grooves 222 are distributed in an array with the central axis of the female connector 110.

[0054] In this embodiment, when the guide piece 221 is inserted into the guide groove 222, the inclined surface of the guide piece 221 is inserted into the guide groove 222 to reduce resistance, facilitate positioning, reduce the risk of damage, and improve the efficiency of the connection between the female connector 110 and the male connector 120. When the eight groups of guide pieces 221 are fully inserted into the eight groups of guide grooves 222, the stability of the connection between the female connector 110 and the male connector 120 is improved.

[0055] Example 3

[0056] like Figure 3 , Figure 7 and Figure 8 As shown, on the basis of Example 1, the reset unit 250 includes a spring 251, and the spring 251 is fixedly installed inside the base 241, a gasket 252 is fixedly installed on the top of the spring 251, and a fixing column 253 is fixedly installed on the top of the gasket 252, the gasket 252 and the fixing column 253 are both inserted into the inside of the base 241, the inside of the rotating shaft 242 is provided with a rotating groove adapted to the fixing column 253, the rotating shaft 242 is sleeved on the outside of the fixing column 253, and the bottom of the rotating shaft 242 conflicts with the top of the gasket 252, and the outer side of the female connector 110 is sleeved with an extrusion Structure 3, and the extrusion structure 3 includes a sliding cylinder 310, the sliding cylinder 310 is sleeved on the outside of the female connector 110, a spring three 320 is inserted inside the sliding cylinder 310, and the spring three 320 is located on the outside of the female connector 110, a support ring two 330 is fixedly installed on the outside of the female connector 110, the support ring two 330 is located at one end of the spring three 320, the outer diameter of the support ring two 330 is matched with the inner diameter of the sliding cylinder 310 at two-thirds, the inner diameter of the sliding cylinder 310 at one-third is matched with the outer diameter of the connecting sleeve 210, and the top of the rotating shaft 242 is an arc-shaped structure.

[0057] In this embodiment, the sliding cylinder 310 is moved to make the inner wall of the sliding cylinder 310 collide with the arc surface at the top of the rotating shaft 242. At this moment, the bottom of the rotating shaft 242 presses the gasket 252 and the spring 251, and the elastic force of the spring 251 contracts, so that the rotating shaft 242 sinks inside the base 241, thereby separating the teeth of the circular gear 243 and the rack 244. At this moment, the rack 244 lacks the limit of the circular gear 243, so that the male connector 120 can separate the inside of the female connector 110. This method is conducive to quickly cutting off the current and reducing the occurrence of accidents such as electric shock and fire. The elastic force of spring three 320 and the supporting force of support ring two 330 on spring three 320 facilitate the reset of sliding cylinder 310, and the elastic support of spring one 251 cooperates with gasket 252 and fixing column 253 to make rotating shaft one 242 drive circular gear 243 to reset, which is beneficial for the subsequent meshing of rack 244 with circular gear 243, so as to achieve the effect of quick installation and separation of female connector 110 and male connector 120, so as to simplify the maintenance and replacement of female connector 110 and male connector 120, thereby enhancing the flexibility of female connector 110 and male connector 120.

[0058] Example 4

[0059] like Figure 3 and Fig.10As shown, on the basis of Example 1, a sealing structure 4 is embedded in one end of the female connector 110, and the sealing structure 4 includes a rubber strip 410, which is embedded in the interior of the female connector 110, and a sealing ring 420 is fixedly installed at one end of the rubber strip 410, and a cavity 430 is opened in the interior of the sealing ring 420, and a cavity 2 440 is opened in the interior of the sealing ring 420, and the cavity 1 430 is located in the middle of the interior of the sealing ring 1 420, and the cavity 2 440 is located on both sides of the inner wall of the sealing ring 1 420, and the cavity 1 430 and the cavity 2 440 are cross-distributed, and a sealing ring 2 5 is fixedly installed in the interior of the female connector 110, and the sealing ring 2 5 is located directly below the base 241, and the outer side of the sealing ring 25 is in conflict with the inner wall of the female connector 110.

[0060] In this embodiment, when the male connector 120 is inserted into the female connector 110, the male connector 120 squeezes the sealing structure 4 and the sealing ring 2 5 at the connection between the female connector 110, and through the arc structure of the cavity 1 430, cooperates with the concave structure of the cavity 2 440 to reduce the pressure on a single cavity 1 430 or cavity 2 440, thereby extending the service life of the sealing ring 1 420 and improving the sealing between the female connector 110 and the male connector 120.

[0061] Working principle: After the user connects the female connector 110 and the male connector 120 with a cable, the male connector 120 is inserted into the guide groove 222 through the inclined surface of the guide piece 221, so that the male connector 120 drives the rack 244 to mesh with the circular gear 243 through the teeth through the connecting sleeve 210. At this time, the circular gear 243 drives the rotating shaft 1 242 to rotate stably inside the base 241 and outside the fixed column 253. At the same time, the ratchet 282 rotates with the rotating shaft 1 242, and the disc 281 is inserted into the inside of the base 241 through the limiting column 270, so that the disc 281 does not follow the rotating shaft 1 242 rotates, and through the elastic force of the second spring 285, the ratchet 284 rotates on the outside of the second shaft 283 and limits the teeth of the ratchet 282, so that the ratchet 282 can only rotate in one direction. Since the ratchet 282 and the circular gear 243 rotate coaxially with the first shaft 242, the direction of rotation of the circular gear 243 is consistent with that of the ratchet 282, thereby realizing the unidirectional movement of the rack 244, so as to facilitate the stable insertion of the male connector 120 into the female connector 110. When the male connector 120 is inserted into the female connector 110, the sealing structure of the connection between the male connector 120 and the female connector 110 4 is squeezed with the sealing ring 2 5, and the arc structure of the cavity 1 430 cooperates with the concave structure of the cavity 2 440 to reduce the pressure on a single cavity 1 430 or cavity 2 440, thereby extending the service life of the sealing ring 1 420 and improving the sealing performance between the female connector 110 and the male connector 120. When the female connector 110 needs to be separated from the male connector 120, the staff moves the sliding cylinder 310. At this moment, the inner wall of the sliding cylinder 310 conflicts with the arc surface at the top of the rotating shaft 1 242. At the same time, the rotating shaft 1 242 sinks inside the base 241, so that the circular gear 243 and the male connector 120 are in contact with each other. The teeth of the rack 244 are separated. At this moment, the rack 244 lacks the limit of the circular gear 243, so that the male connector 120 can be pulled out of the female connector 110. The elastic force of the spring three 320 and the support force of the support ring two 330 on the spring three 320 can facilitate the reset of the sliding cylinder 310. The elastic force support of the spring one 251 cooperates with the gasket 252 and the fixing column 253 to make the rotating shaft one 242 drive the circular gear 243 to reset, which is beneficial for the subsequent meshing of the rack 244 and the circular gear 243, thereby achieving the effect of quick installation and separation of the female connector 110 and the male connector 120.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An explosion-proof controllable power on / off quick connector for underground coal mines, comprising a connector (1), wherein the connector (1) comprises a female connector (110) and a male connector (120), wherein the male connector (120) is located on the outside of one end away from the female connector (110), and is characterized in that: Also includes: A connecting structure (2), the connecting structure (2) being fixedly mounted on the outside of the male connector (120), the connecting structure (2) being used to connect the female connector (110) to the male connector (120); The connection structure (2) comprises a connection sleeve (210), and the connection sleeve (210) is fixedly mounted on the outside of the male joint (120), a guide unit (220) is fixedly mounted on the outside of the male joint (120), an engagement unit (240) is fixedly mounted inside the female joint (110), a reset unit (250) is fixedly mounted inside the engagement unit (240), a limit ring (260) is fixedly mounted on the outside of the engagement unit (240), a limit column (270) is inserted inside the engagement unit (240), and a locking unit (280) is sleeved on the outside of the engagement unit (240); The meshing unit (240) comprises a base (241), and the base (241) is fixedly mounted inside the female connector (110), and a rotating shaft 1 (242) is inserted inside the base (241); The locking unit (280) comprises a disk (281), and the disk (281) is sleeved on the outer side of the first rotating shaft (242), a ratchet (282) is fixedly mounted on the outer side of the first rotating shaft (242), a second rotating shaft (283) is fixedly mounted on the top end of the disk (281), and a ratchet (284) is sleeved on the outer side of the second rotating shaft (283), a second spring (285) is fixedly mounted on the outer side of the ratchet (284), and a fixing plate (286) is fixedly mounted on the other end of the second spring (285), and the fixing plate (286) is fixedly mounted on the top end of the disk (281).

2. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 1, characterized in that: The guide unit (220) comprises a guide piece (221), and the guide piece (221) is fixedly mounted on the outside of the male connector (120), and a guide groove (222) is provided inside the female connector (110).

3. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 2, characterized in that: One end of the guide piece (221) is in an inclined structure, and the inner diameter of the guide groove (222) is matched to the outer diameter of the guide piece (221).

4. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 2, characterized in that: Eight groups of the guide plates (221) and guide grooves (222) are arranged at equal distances, and the eight groups of the guide plates (221) and guide grooves (222) are distributed in an array around the central axis of the female connector (110).

5. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 1, characterized in that: The reset unit (250) comprises a spring 1 (251), and the spring 1 (251) is fixedly mounted inside the base (241), a gasket (252) is fixedly mounted on the top of the spring 1 (251), and a fixing column (253) is fixedly mounted on the top of the gasket (252).

6. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 1, characterized in that: A rotation groove matching the fixing column (253) is provided inside the first rotation shaft (242).

7. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 1, characterized in that: The outer side of the female connector (110) is sleeved with an extrusion structure (3), and the extrusion structure (3) comprises a sliding cylinder (310), the sliding cylinder (310) is sleeved on the outer side of the female connector (110), a spring three (320) is inserted into the interior of the sliding cylinder (310), and a support ring two (330) is fixedly installed on the outer side of the female connector (110).

8. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 7, characterized in that: The outer diameter of the second support ring (330) is matched to the inner diameter of the sliding cylinder (310) at two-thirds.

9. The explosion-proof controllable power on / off quick connector for underground coal mines according to claim 7, characterized in that: The inner diameter of the sliding cylinder (310) at one third of the diameter is matched to the outer diameter of the connecting sleeve (210), and the top end of the rotating shaft (242) is in an arc-shaped structure.

10. The underground explosion-proof controllable power on / off quick connector for coal mines according to claim 1, characterized in that: A sealing structure (4) is embedded in one end of the female joint (110), and the sealing structure (4) comprises a rubber strip (410), the rubber strip (410) is embedded in the interior of the female joint (110), a sealing ring 1 (420) is fixedly mounted on one end of the rubber strip (410), and a cavity 1 (430) is provided inside the sealing ring 1 (420), and a cavity 2 (440) is provided inside the sealing ring 1 (420).

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