Mining flame-proof and intrinsic safety type wireless electric valve

Abstract

The invention relates to the technical field of valves, in particular to a mining flame-proof and intrinsic safety type wireless electric valve which comprises a valve body, a fixing seat fixed to the top end of the valve body and a protective shell fixed to the top end of the fixing seat. The problems of aging, embrittlement, layering and falling of a raw adhesive tape in a high-humidity, dust and continuous vibration environment under a mine are effectively avoided, the risk of medium leakage is avoided, falling fragments are prevented from invading into the valve body to interfere with the action of a transmission mechanism, meanwhile, the triggering assembly and the opening and closing assembly can achieve automatic and accurate filling of a thread groove with the sealant, sealing uniformity is guaranteed, and the service life of the sealing device is prolonged. The explosion-proof performance is ensured to be stable and reach the standard, repeated winding operation in a narrow space by manpower is not needed, equipment shutdown caused by frequent disassembly and replacement of a sealing element is reduced, and the long-term sealing reliability of the valve under severe working conditions of mines is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a mine-used explosion-proof and intrinsic safety type wireless electric valve. BACKGROUND

[0002] As an important actuating mechanism in the industrial automatic control system, the electric valve has been widely applied in many fields such as petroleum, mine, natural gas and drainage, and occupies a large market share.

[0003] Pneumoconiosis is the most serious occupational disease that endangers the health of a large number of employees, mainly distributed in coal, metallurgy, machinery, building materials, petroleum chemical industry and light industry industries, especially in the production process of underground coal mine operation, a large amount of dust will be produced, therefore, in order to ensure the safety of the operating personnel, explosion-proof electric ball valve is installed in the mine, which is an indispensable actuating mechanism for automatic water supply and dust reduction control in underground coal mine.

[0004] When the mine-used explosion-proof and intrinsic safety type wireless electric valve is connected with the pipeline, in order to ensure the sealing performance of the spiral connection, raw adhesive tape is usually wound outside the pipeline joint, but this sealing method depending on the raw adhesive tape winding has obvious technical defects, the raw adhesive tape is easy to accelerate aging and become brittle and delaminate in the harsh environment of high humidity, much dust and continuous vibration in the mine, which cannot maintain the sealing effect for a long time, causes the risk of medium leakage, the falling raw adhesive tape fragments may also invade the inside of the valve body, interfere with the action of the transmission mechanism, affect the normal control of the valve, in addition, the manual winding of the raw adhesive tape in the narrow space in the mine is difficult to operate, and the aged raw adhesive tape needs to be replaced frequently by disassembling the valve, which not only increases the equipment downtime, but also may damage the integrity of the intrinsic safety circuit due to improper operation, further reduces the reliability and long-term operation stability of the wireless control of the valve. SUMMARY

[0005] The present application aims to provide a mine-used explosion-proof and intrinsic safety type wireless electric valve, which solves the problem that the raw adhesive tape is easy to accelerate aging and become brittle and delaminate in the harsh environment of high humidity, much dust and continuous vibration in the mine, which cannot maintain the sealing effect for a long time, causes the risk of medium leakage, the falling raw adhesive tape fragments may also invade the inside of the valve body, interfere with the action of the transmission mechanism, affect the normal control of the valve, in addition, the manual winding of the raw adhesive tape in the narrow space in the mine is difficult to operate, and the aged raw adhesive tape needs to be replaced frequently by disassembling the valve, which not only increases the equipment downtime, but also may damage the integrity of the intrinsic safety circuit due to improper operation, further reduces the reliability and long-term operation stability of the wireless control of the valve.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A mine explosion-proof and intrinsic safety type wireless electric valve, comprising a valve body, a fixed seat fixed at the top end of the valve body, and a protective shell fixed at the top end of the fixed seat, both ends of the valve body are fixed with a connecting head, a threaded groove is spirally formed on the inner wall of the connecting head, an annular isolation cover is fixedly and sealingly installed outside the connecting head, a storage cavity is formed in the inside of the annular isolation cover, a trigger assembly is arranged in the inside of the storage cavity, an isolation ring is fixedly installed at the middle position of the inside of the storage cavity, a plurality of limiting columns are spirally and fixedly arranged in the inside of the threaded groove, one end of each of the limiting columns is arranged in the inside of one side of the storage cavity, a through hole is formed in the inside of each of the limiting columns, an opening and closing assembly is arranged in the inside of the through hole, and a heating assembly is arranged on the outside of one side of the connecting head close to the annular isolation cover.

[0007] Further, a valve driver is arranged in the inside of the protective shell, a drive shaft is coaxially fixed at the output end of the valve driver, the bottom end of the drive shaft is rotatably and fixedly installed at the bottom end of the outside of the protective shell, the bottom end of the drive shaft is coaxially fixed with a valve rod at the top end of the valve body, and a cable inlet pipe is fixedly arranged at one side of the protective shell.

[0008] Further, the opening and closing assembly comprises a limiting slide column and a ball, the limiting slide column is arranged in the inside of the through hole, the ball is arranged at the outside of one end of the limiting slide column close to the threaded groove, a fixing ring is slidingly and sealingly installed at the outside of the limiting slide column, the fixing ring is fixedly installed at one side of the inside of the through hole, and a positioning disc is fixedly installed at one side of the limiting slide column close to the ball.

[0009] Further, one side of the positioning disc is fixedly installed at the outside of one side of the limiting slide column, a piston block is fixedly installed at one side of the limiting slide column away from the positioning disc, the piston block is slidingly and sealingly installed at one side of the inside of the through hole, a lead-in channel is formed at the middle position of the inside of the piston block, an exhaust channel is formed in the inside of the ball, the positioning disc and the limiting slide column, and one end of the exhaust channel is in communication with one end of the lead-in channel.

[0010] Further, a compression spring is arranged at the outside of the limiting slide column between the positioning disc and the fixing ring, and the two ends of the compression spring are fixedly installed at one side of the positioning disc and one side of the fixing ring, respectively.

[0011] Further, the trigger assembly comprises a sealing ring and a contact ring, the sealing ring is slidingly and sealingly installed in the inside of the storage cavity between the isolation ring and the annular isolation cover, the contact ring is arranged at the opening end of the connecting head, and a plurality of contact rods are fixedly and equiangularly installed at one side of the sealing ring close to the contact ring.

[0012] Further, one end of the plurality of said resistance rods is slidably installed through the side of the annular isolation cover, the through end of the plurality of said resistance rods is fixedly connected with the side of the resistance ring, the outside of each said resistance rod is slidably provided with a sealing ring, one side of the sealing ring is embeddedly installed on the outside of the side of the annular isolation cover, and a plurality of through openings are equiangularly and circumferentially provided on the side of the isolation ring away from the resistance ring.

[0013] Further, the outside of each said resistance rod inside the storage cavity is provided with a tension spring, both ends of the tension spring are fixedly installed on the side of the sealing ring and the side of the inner wall of the storage cavity, and the side of the annular isolation cover is threadedly connected with a sealing cover.

[0014] Further, the heating assembly comprises a plurality of heating pieces and a through ring, the plurality of said heating pieces are equiangularly and circumferentially fixedly installed on the outside of the connecting head, the through ring is fixedly installed on the outside of the side of the annular isolation cover through a support, one end of the plurality of said heating pieces is electrically connected with a through block, and one end of the through block is electrically connected with the side of the annular isolation cover and the through ring.

[0015] Further, the outside of the side of the connecting head close to the through ring is fixedly installed with a mounting seat, the outside of the side of the mounting seat is fixedly installed with a press switch, the input end of the press switch is electrically connected with a second lead wire, the output end of the press switch is electrically connected with a first lead wire, and the end of the first lead wire away from the press switch is electrically connected with the end of the through ring.

[0016] Compared with the prior art, the beneficial effects of the present application are: 1. Through the setting of the trigger assembly and the opening and closing assembly, the mine explosion-proof and intrinsic safety type wireless electric valve can be free from the dependence on the traditional raw rubber belt winding sealing in use, effectively avoiding the problems of raw rubber belt aging, brittleness and delamination in the high humidity, dust and continuous vibration environment underground, avoiding the risk of medium leakage, preventing the intrusion of falling fragments into the valve body to interfere with the action of the transmission mechanism, at the same time, the trigger assembly and the opening and closing assembly can realize automatic and accurate filling of the sealing material in the threaded groove, ensure the uniformity of sealing, ensure the stability of explosion-proof performance, meet the standard, do not need manual repeated winding operation in a small space, reduce the equipment downtime caused by frequent disassembly and replacement of sealing elements, and significantly improve the long-term sealing reliability of the valve in the harsh working conditions of the mine.

[0017] 2、Through the setting of the opening and closing assembly, the mine explosion-proof and intrinsic safety type wireless electric valve can automatically control the conduction of the corresponding position discharge channel according to the length of the screw groove area of the pipeline joint, and only the sealing material in the screw groove area is released, and the non-contact area is kept closed, avoiding the invalid discharge of the sealing material in the sealing area, reducing waste, preventing the accumulation of excess sealing material from affecting the precision of the thread engagement or polluting the environment, and ensuring that all actual contact sealing surfaces have sufficient sealing material to ensure sealing effect, meeting the use requirements of high efficiency, low consumption and safety and environmental protection of mining equipment, when disassembling, the heating assembly can quickly soften the cured sealing material, reduce the adhesion force between the sealing material and the thread groove, avoid thread damage or deformation of the connecting head caused by hard twisting, and reduce the labor consumption of disassembly operation, adapt to the maintenance requirements of narrow space underground, and have good overall use effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall structure of the present application; Figure 1 is a schematic diagram of the overall structure of the present application; Figure 3 is a schematic diagram of the overall structure of the present application; Figure 4 is a schematic diagram of the overall structure of the present application; Figure 3 is a schematic diagram of the overall structure of the present application; Figure 5 is a schematic diagram of the overall structure of the present application; Figure 6 is a schematic diagram of the overall structure of the present application; Figure 5 is a schematic diagram of the overall structure of the present application; Figure 7 is a schematic diagram of the overall structure of the present application; Figure 8 is a schematic diagram of the overall structure of the present application; Figure 9 is a schematic diagram of the overall structure of the present application; Figure 10 is a schematic diagram of the overall structure of the present application; Figure 11 is a schematic diagram of the overall structure of the present application; Figure 10

[0019] ​The components represented by the reference numbers in the drawings are listed as follows: 1, valve body; 2, protective shell; 3, connecting head; 4, threaded groove; 5, annular isolation cover; 6, storage cavity; 7, isolation ring; 8, sealing ring; 9, abutting rod; 10, abutting ring; 11, sealing ring; 12, through port; 13, limiting column; 14, through hole; 15, fixing ring; 16, limiting sliding column; 17, positioning disc; 18, ball; 19, piston block; 20, discharge channel; 21, inlet channel; 22, compression spring; 23, extension spring; 24, sealing cover; 25, heating sheet; 26, through block; 27, through ring; 28, mounting seat; 29, first lead wire; 30, press switch; 31, second lead wire; 32, fixing seat; 33, valve driver; 34, drive shaft; 35, cable inlet pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Embodiment one: please refer to Figure 1 Figure 9 A mine explosion-proof and intrinsic safety type wireless electric valve comprises a valve body 1, a fixing seat 32 fixed at the top end of the valve body 1, and a protective shell 2 fixed at the top end of the fixing seat 32. Connecting heads 3 are fixed at both ends of the valve body 1. Threaded grooves 4 are spirally formed in the inner walls of the connecting heads 3. Annular isolation covers 5 are fixed and sealed on the outer parts of the connecting heads 3. Storage cavities 6 are formed in the inner parts of the annular isolation covers 5. Trigger assemblies are arranged in the inner parts of the storage cavities 6. Isolation rings 7 are fixedly installed at the middle positions in the inner parts of the storage cavities 6. Limiting columns 13 are spirally and fixedly arranged in the inner parts of the threaded grooves 4. The limiting columns 13 are fixedly arranged at one side of the storage cavity 6. Through holes 14 are formed in the inner parts of the limiting columns 13. Opening and closing assemblies are arranged in the inner parts of the through holes 14.

[0022] A valve driver 33 is arranged in the inner part of the protective shell 2. A drive shaft 34 is coaxially fixed at the output end of the valve driver 33. The bottom end of the drive shaft 34 is rotatably fixed at the bottom end of the protective shell 2. The bottom end of the drive shaft 34 is coaxially fixed with a valve rod at the top end of the valve body 1. A cable inlet pipe 35 is fixedly arranged at one side of the protective shell 2.

[0023] ​The opening and closing assembly comprises a limiting slide column 16 and a ball 18. The limiting slide column 16 is arranged inside the through hole 14, and the ball 18 is arranged outside one end of the limiting slide column 16 close to the threaded groove 4. The outside of the limiting slide column 16 is provided with a fixed ring 15 which is slidingly and sealingly arranged. The fixed ring 15 is fixedly arranged inside one side of the through hole 14. The ball 18 is fixedly arranged with a positioning disc 17 on one side close to the limiting slide column 16.

[0024] The positioning disc 17 is fixedly arranged on one side of the limiting slide column 16. The limiting slide column 16 is fixedly arranged with a piston block 19 on one side away from the positioning disc 17. The piston block 19 is slidingly and sealingly arranged inside one side of the through hole 14. The inside of the piston block 19 is provided with an inlet channel 21. The ball 18, the positioning disc 17 and the limiting slide column 16 are provided with an outlet channel 20. One end of the outlet channel 20 is in communication with one end of the inlet channel 21.

[0025] The limiting slide column 16 is provided with a compression spring 22 outside between the positioning disc 17 and the fixed ring 15. The two ends of the compression spring 22 are fixedly arranged on one side of the positioning disc 17 and one side of the fixed ring 15 respectively.

[0026] The trigger assembly comprises a sealing ring 8 and a contact ring 10. The sealing ring 8 is slidingly and sealingly arranged inside the storage cavity 6 between the isolation ring 7 and the annular isolation cover 5. The contact ring 10 is arranged outside the opening end of the connecting head 3. The sealing ring 8 is fixedly arranged with a plurality of contact rods 9 at equal angles on one side close to the contact ring 10.

[0027] One end of each of the plurality of contact rods 9 is slidingly arranged through one side of the annular isolation cover 5. The penetrating end of each of the plurality of contact rods 9 is fixedly connected to one side of the contact ring 10. The outside of each of the plurality of contact rods 9 is provided with a sealing ring 11 which is slidingly and sealingly arranged. One side of the sealing ring 11 is embeddedly arranged outside one side of the annular isolation cover 5. The isolation ring 7 is provided with a plurality of communication openings 12 at equal angles on one side away from the contact ring 10.

[0028] The outside of each of the plurality of contact rods 9 inside the storage cavity 6 is provided with a tension spring 23. The two ends of the tension spring 23 are fixedly arranged on one side of the sealing ring 8 and one side of the inner wall of the storage cavity 6 respectively. The annular isolation cover 5 is threadedly connected with a sealing cover 24 on one side.

[0029] In this embodiment, through the cooperative action of the trigger assembly and the opening and closing assembly, automatic and accurate filling of the sealant is realized when the pipeline joint is connected with the connecting head 3. At the same time, the valve driving device 33 in the protective shell 2 guarantees the on-off function of the valve. The specific working process is as follows: When the pipeline joint is not connected, the device as a whole is in an initial standby state. Trigger component: the tensile spring 23 is initially in a contracted state, the several abutment rods 9 extend outward from the annular isolation cover 5, the abutment ring 10 is outside the open end of the connector head 3 (protruding from the end face of the connector head 3), forming a clear contact trigger end; the sealing cover 24 on one side of the annular isolation cover 5 is tightened, and a sufficient amount of existing sealant is stored in the storage cavity 6, which can be supplemented by disassembling the sealing cover 24.

[0030] Opening and closing component: the compression spring 22 is initially in a natural relaxation state, pushing the positioning disc 17 and the ball 18 to extend in the direction of the threaded groove 4, so that part of the ball 18 is exposed inside the inner wall of the threaded groove 4; at the same time, the positioning disc 17 drives the limiting slide column 16 and the piston block 19 to maintain the initial position in the through hole 14, so that the inlet channel 21 of the piston block 19 is not connected with the storage cavity 6, and the discharge channel 20 is closed, so that the sealant cannot be discharged.

[0031] Valve driving structure: the existing valve driver 33 in the protective shell 2 is connected with the mine intrinsically safe power supply and control signal through the cable guide pipe 35, the drive shaft 34 is coaxially fixed with the valve rod of the valve body 1, after the sealing is completed, the existing wireless control module can be used to control the valve driver 33 to be powered on and started, the drive shaft 34 is driven to rotate by the valve driver 33, and the on-off control of the valve body 1 is realized.

[0032] It should be further pointed out that when the external pipeline joint is screwed into the threaded groove 4 of the connector head 3, the device triggers the following actions in sequence: First step: the trigger component is started, after the pipeline joint is screwed in to a certain extent, the end part thereof first contacts the abutment ring 10 and applies an axial pushing force; the abutment ring 10 is driven to slide the several abutment rods 9 inward from the annular isolation cover 5, and the tensile spring 23 is elongated to produce deformation; the abutment rods 9 synchronously push the sealing ring 8 to slide in the storage cavity 6, and the sealant in the storage cavity 6 is extruded by the sealing ring 8, enters the inlet of the through hole 14 of the limiting column 13 through the through port 12, and completes the pressurization and passage preparation of the sealant.

[0033] Second step: the opening and closing assembly accurately discharges glue, realizes the threaded sealing pipe joint continues to rotate into the threaded groove 4, and the threaded convex of the outer wall of the pipe joint will contact the ball 18 at the corresponding position and exert radial pressure; the ball 18 shrinks to the inside of the through hole 14 after being stressed, drives the positioning disc 17 to extrude the compression spring 22, and at the same time pushes the limiting slide column 16 and the piston block 19 to slide to the storage cavity 6 direction; when the piston block 19 slides to the inside of one side of the storage cavity 6, the pressurized sealing glue in the storage cavity 6 enters the discharge channel 20 through the inlet channel 21, and is discharged from the ball 18 to the contact gap between the pipe joint and the threaded groove 4, realizing sealing and filling at this position, so that the mine explosion-proof and intrinsic safety type wireless electric valve can be used without relying on the traditional raw rubber belt winding sealing, effectively avoiding the problems of raw rubber belt aging, brittleness and delamination in the high humidity, dust and continuous vibration environment under the mine, avoiding the risk of medium leakage, preventing the intrusion of falling fragments into the valve body 1 to interfere with the action of the transmission mechanism, at the same time, without manual repeated winding operation in a small space, the equipment downtime caused by frequent disassembly and replacement of sealing elements is also reduced, and the long-term sealing reliability of the valve in the harsh working conditions of the mine is significantly improved.

[0034] At the same time, since the pipe joint only contacts the ball 18 on the rotation path, the ball 18 in the unrotated area still maintains the extended state under the action of the compression spring 22, the piston block 19 does not move, the inlet channel 21 is not connected, and the sealing glue is only discharged in the threaded groove 4 area contacted by the pipe joint (this point can be realized by Figure 9 The connection state of the medium and short pipe joint and the connecting head 3 is directly reflected, since the short pipe joint has a limited rotation length, its outer wall can only touch part of the area of the threaded groove 4 close to the opening end, and the part of the threaded groove 4 close to the inside is not rotated by the pipe joint, the ball 18 at the corresponding position always maintains the extended state under the action of the compression spring 22, the piston block 19 does not move, the inlet channel 21 is not connected, and the glue solution naturally cannot be filled in these areas), avoiding invalid waste, at the same time, preventing the accumulation of excess sealing glue from affecting the precision of thread engagement or polluting the environment, and ensuring that all actual contact sealing surfaces have sufficient sealing glue to ensure sealing effect, meeting the use requirements of high efficiency, low consumption and safety and environmental protection of mine equipment.

[0035] It should be noted that when the pipe joint needs to be disassembled, first start the heating assembly to run, and then rotate the pipe joint in the opposite direction to make it exit the threaded groove 4: When the pipe joint is separated from the ball 18, the compression spring 22 restores to relaxation, pushes the positioning disc 17, the ball 18, the limiting slide column 16 and the piston block 19 to reset, the inlet channel 21 is not conductive with the inside of the storage cavity 6, the outlet channel 20 is closed, at the same time, the pipe joint is separated from the contact ring 10, the stretching spring 23 restores to relaxation, pulls the contact rod 9 and the contact ring 10 to reset, the sealing ring 8 reattaches the isolation ring 7, the conductive port 12 is closed, the sealing material in the storage cavity 6 stops being supplied, and the device returns to the initial standby state, and can wait for the next pipe butt joint.

[0036] Embodiment two: please refer to Figure 10 Figure 11 The embodiment is further illustrated to embodiment one, and the heating assembly is arranged on the outer side of the one side of the connecting head 3 close to the annular isolation cover 5.

[0037] The heating assembly comprises a plurality of heating pieces 25 and a conductive ring 27, the plurality of heating pieces 25 are fixedly attached to the outer side of the one side of the connecting head 3 at equal angles, the conductive ring 27 is fixedly installed on the outer side of the one side of the annular isolation cover 5 through a support, and one end of each of the plurality of heating pieces 25 is electrically connected and fixed with a conductive block 26, and one end of each of the conductive blocks 26 penetrates through the annular isolation cover 5 and is electrically connected and fixed with the one side of the conductive ring 27.

[0038] The mounting seat 28 is fixedly installed on the outer side of the one side of the connecting head 3 close to the conductive ring 27, the pressing switch 30 is fixedly installed on the outer side of the one side of the mounting seat 28, the input end of the pressing switch 30 is electrically connected and fixed with the second lead wire 31, the output end of the pressing switch 30 is electrically connected and fixed with the first lead wire 29, and the end, away from the pressing switch 30, of the first lead wire 29 is electrically connected and fixed with the one end of the conductive ring 27.

[0039] In the embodiment, when the pipe joint needs to be disassembled, the heating assembly is first started to soften the solidified sealing material, and the specific steps are as follows: Step one: trigger heating, the maintenance personnel press the pressing switch 30 on the mounting seat 28 in the narrow space under the mine, so that the internal contact of the switch is closed; at this time, the current of the mine intrinsic safety power supply flows into the pressing switch 30 through the second lead wire 31, is closed through the switch, and is transmitted to the conductive ring 27 through the first lead wire 29; the conductive ring 27 uniformly distributes the current to each conductive block 26, and finally the current flows into the corresponding heating piece 25, and the heating assembly is formally started to work.

[0040] Step two: heat transfer, the heating piece 25 generates heat after being electrified, the sealing material in the thread groove 4 absorbs heat, and its physical state changes from solid to semi-fluid, the adhesion between the sealing material and the outer wall of the pipe joint and the inner wall of the thread groove 4 is greatly reduced, and the problem that the sealing material is adhered to cause the thread profile to be damaged and the connecting head 3 to be deformed when the traditional hard twisting is disassembled is avoided.

[0041] ​Third step: cooperative disassembly, when the sealant softens (in the underground environment, the heating sheet 25 works for 1-2 minutes to meet the softening requirement), the maintenance personnel reversely rotate the pipe joint to make it exit along the threaded groove 4, at the same time, the softened sealant no longer produces strong adhesion resistance during the pipe joint exit process, which can be easily rotated out, protecting the structural integrity of the threaded groove 4 and the pipe joint. Finally, after the pipe joint completely exits, the press switch 30 is released, the circuit is disconnected, and the heating sheet 25 stops heating to avoid overheating of the connecting head 3 caused by continuous heating, ensuring the overall operation stability.

[0042] It also needs to be explained that when the pipe joint is reversely rotated out and separated from the contact ring 10, it will gradually exit from the front segment area close to the opening end of the connecting head 3 to the rear segment area along the threaded groove 4; at the same time, the tension spring 23 returns to the contracted state, pulling the contact rod 9 and the sealing ring 8 to rebound away from the isolation ring 7. At this time, the space between the isolation ring 7 and the sealing ring 8 in the storage cavity 6 increases in volume due to the rebound of the sealing ring 8, forming a local negative pressure, which generates suction through the discharge channel 20 and the inlet channel 21, sucking the residual semi-fluid sealant in the threaded groove 4.

[0043] It needs to be noted that the range of negative pressure suction is directly related to the timing of the pipe joint exit and the reset state of the on-off assembly: when the pipe joint exits the front segment threaded groove 4 first, the corresponding ball 18 will lose the resistance of the pipe joint first, and will extend to the threaded groove 4 direction under the action of the compression spring 22, synchronously pushing the piston block 19 to reset to the initial position, making the inlet channel 21 disconnected with the inside of the storage cavity 6, that is, the passage of the front segment threaded groove 4 has been closed, and the negative pressure suction cannot be transmitted to this area, while for the rear segment threaded groove 4, due to the pipe joint exiting this area later, the reset action of the ball 18 lags behind for a short time, at the moment when the negative pressure is formed by the rebound of the sealing ring 8, the corresponding piston block 19 of the rear segment threaded groove 4 has not completely reset, and the inlet channel 21 is still in a short time open state, so the negative pressure suction can pass through the open passage to suck the residual sealant in the rear segment threaded groove 4, which is still in a fluid state due to heating softening, to the negative pressure area in the storage cavity 6 through the discharge channel 20 and the inlet channel 21 in turn. This process not only recycles the fluid sealant in the rear segment area for secondary use, reducing the waste and frequency of supplementing the sealant underground, but also solves the risk of the residual sealant in the rear segment threaded groove 4 (located on the side away from the valve body 1 of the connecting head 3) blocking the passage after solidification, clears the obstacles for the smooth discharge of the sealant for the next pipe docking, and reduces the difficulty of cleaning for the next assembly.

[0044] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0045] While the embodiments of the application have been shown and described herein, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made to the embodiments without departing from the spirit and scope of the application, which is defined by the claims and their equivalents.

Claims

1. A mine-use explosion-proof and intrinsically safe wireless electric valve, comprising a valve body (1), a fixing seat (32) fixed to the top of the valve body (1), and a protective shell (2) fixed to the top of the fixing seat (32), characterized in that: Both ends of the valve body (1) are connected and fixed with a connector (3). The inner wall of the connector (3) is spirally provided with a threaded groove (4). The outer side of the connector (3) is fitted with a ring-shaped isolation cover (5) and sealed. The inner side of the ring-shaped isolation cover (5) is provided with a storage cavity (6). The storage cavity (6) is provided with a trigger component. The middle position of the storage cavity (6) is fixedly installed with an isolation ring (7). The threaded groove (4) is spirally surrounded and fixed with several limiting posts (13). One end of several limiting posts (13) is provided inside one side of the storage cavity (6). The inner side of each limiting post (13) is provided with a through hole (14). The inner side of the through hole (14) is provided with an opening and closing component. The outer side of the connector (3) near the ring-shaped isolation cover (5) is provided with a heating component.

2. The intrinsically safe and explosion-proof wireless electric valve for mining as described in claim 1, characterized in that: The protective shell (2) is equipped with a valve actuator (33). The output end of the valve actuator (33) is coaxially fixed with a drive shaft (34). The bottom end of the drive shaft (34) is rotatably installed outside the bottom end of the protective shell (2). The bottom end of the drive shaft (34) is coaxially fixed with the valve stem at the top of the valve body (1). A cable inlet tube (35) is fixed through one side of the protective shell (2).

3. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 1, characterized in that: The opening and closing assembly includes a limiting slide (16) and a ball (18). The limiting slide (16) is disposed inside the through hole (14). The ball (18) is disposed outside the end of the limiting slide (16) near the threaded groove (4). A fixing ring (15) is installed through the outside of the limiting slide (16) in a sliding seal. The fixing ring (15) is fixedly installed inside one side of the through hole (14). A positioning plate (17) is fixedly installed on the side of the ball (18) near the limiting slide (16).

4. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 3, characterized in that: One side of the positioning disk (17) is fixedly installed on the outside of one side of the limiting slide column (16). A piston block (19) is fixedly installed on the side of the limiting slide column (16) away from the positioning disk (17). The piston block (19) is slidably sealed inside one side of the through hole (14). An inlet channel (21) is opened through the middle of the inside of the piston block (19). An outlet channel (20) is opened through the inside of the ball (18), the positioning disk (17) and the limiting slide column (16). One end of the outlet channel (20) is connected to one end of the inlet channel (21).

5. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 3, characterized in that: The limiting slide (16) is located between the positioning plate (17) and the fixing ring (15) and is fitted with a compression spring (22). The two ends of the compression spring (22) are respectively fixedly installed on one side of the positioning plate (17) and one side of the fixing ring (15).

6. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 1, characterized in that: The triggering component includes a sealing ring (8) and an abutment ring (10). The sealing ring (8) is slidably installed in the storage cavity (6) between the isolation ring (7) and the annular isolation cover (5). The abutment ring (10) is located outside the opening end of the connecting head (3). Several abutment rods (9) are fixedly installed around the sealing ring (8) at equal angles on the side close to the abutment ring (10).

7. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 6, characterized in that: One end of each of the several abutment rods (9) is slidably installed through one side of the annular isolation cover (5). The through end of each of the several abutment rods (9) is fixedly connected to one side of the abutment ring (10). A sealing ring (11) is slidably installed through the outside of each abutment rod (9). One side of the sealing ring (11) is embedded in the outside of one side of the annular isolation cover (5). The isolation ring (7) is provided with several through holes (12) at equal angles around the side away from the abutment ring (10).

8. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 7, characterized in that: Each of the abutment rods (9) is fitted with a tension spring (23) through the outside of the storage cavity (6). The two ends of the tension spring (23) are respectively fixedly installed on one side of the sealing ring (8) and one side of the inner wall of the storage cavity (6). A sealing cap (24) is threadedly connected to one side of the annular isolation cover (5).

9. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 1, characterized in that: The heating assembly includes several heating elements (25) and a conductive ring (27). The heating elements (25) are fixedly attached to one side of the connector (3) at equal angles. The conductive ring (27) is fixedly installed on one side of the annular isolation cover (5) by a bracket. One end of each heating element (25) is electrically connected to a conductive block (26). One end of each conductive block (26) passes through the annular isolation cover (5) and is electrically connected to one side of the conductive ring (27).

10. A mine-use explosion-proof and intrinsically safe wireless electric valve according to claim 9, characterized in that: The connection head (3) is fixedly mounted with a mounting base (28) on the side near the conduction ring (27). A push switch (30) is fixedly mounted on the side of the mounting base (28). The input end of the push switch (30) is electrically connected to a second wire (31). The output end of the push switch (30) is electrically connected to a first wire (29). The end of the first wire (29) away from the push switch (30) is electrically connected to one end of the conduction ring (27).

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