A mine explosion-proof and intrinsic safety type wireless electric valve
By automatically filling the sealant in the triggering and opening/closing components and rapidly softening the heating components, the problem of aging and embrittlement of raw rubber belts in mines is solved, improving the sealing reliability and control stability of the valves and adapting to the usage requirements of harsh underground environments.
Patent Information
- Application Number
- CN202511516869.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2045-10-23
AI Technical Summary
In the harsh environment of high humidity, dust, and continuous vibration in mines, raw rubber tape is prone to aging, embrittlement, delamination, and detachment, resulting in poor sealing performance, high risk of media leakage, and the difficulty of manually wrapping raw rubber tape, which affects the reliability and stability of valve control.
By employing triggering and opening/closing components, the automatic and precise filling and control of sealant is achieved, avoiding reliance on raw rubber tape. Combined with heating components, the sealant is quickly softened, reducing disassembly difficulty and equipment downtime.
It improves the sealing reliability and stability of valves under harsh mining conditions, reduces the risk of media leakage and equipment downtime, and adapts to the maintenance needs of confined spaces in mines.
Smart Images
Figure CN120991152B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of valve technology, specifically to a mine-use explosion-proof and intrinsically safe wireless electric valve. Background Technology
[0002] Electric valves, as important actuators in industrial automation control systems, have been widely used in many fields such as petroleum, mining, natural gas, and drainage, occupying a large market share.
[0003] Pneumoconiosis is one of the most serious occupational diseases that endanger the health of workers in various industries, mainly distributed in coal, metallurgy, machinery, building materials, petrochemical and light industries. In particular, a large amount of dust is generated during underground coal mine operations. Therefore, in order to ensure the safety of workers, explosion-proof electric ball valves are installed in mines. Electric ball valves are essential actuators for the automation of water supply and dust suppression in underground coal mines.
[0004] When connecting intrinsically safe and explosion-proof wireless electric valves to pipelines, raw rubber tape is usually wrapped around the outside of the pipe joint to ensure the sealing of the spiral connection. However, this sealing method relying on raw rubber tape has obvious technical defects. The harsh environment of mines, with high humidity, dust, and continuous vibration, easily causes the raw rubber tape to age, become brittle, and delaminate. This not only fails to maintain the sealing effect in the long term, leading to the risk of media leakage, but also allows the detached raw rubber tape fragments to enter the valve body, interfering with the operation of the transmission mechanism and affecting the normal control of the valve. In addition, manually wrapping raw rubber tape in the confined space of mines is difficult and requires frequent disassembly of the valve to replace the aged raw rubber tape. This not only increases equipment downtime but may also damage the integrity of the intrinsically safe circuit due to improper operation, further reducing the reliability and long-term operational stability of the valve's wireless control. Summary of the Invention
[0005] The purpose of this invention is to provide a mine-use explosion-proof and intrinsically safe wireless electric valve to address the problems mentioned in the background art, such as the harsh environment of mines with high humidity, dust, and continuous vibration, which easily leads to accelerated aging, embrittlement, and delamination of raw rubber tape. This not only fails to maintain a long-term sealing effect and causes the risk of media leakage, but also allows the detached raw rubber tape fragments to enter the valve body, interfering with the operation of the transmission mechanism and affecting the normal control of the valve. In addition, manually wrapping raw rubber tape in the confined space of mines is difficult and requires frequent disassembly of the valve to replace the aged raw rubber tape, which not only increases equipment downtime but may also damage the integrity of the intrinsically safe circuit due to improper operation, further reducing the reliability and long-term operational stability of the valve's wireless control.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a mine-use explosion-proof and intrinsically safe wireless electric valve, comprising a valve body, a fixing seat fixed to the top of the valve body, and a protective shell fixed to the top of the fixing seat. Both ends of the valve body are connected and fixed with connecting heads. The inner walls of each connecting head are spirally grooved. An annular insulating cover is fitted, fixed, and sealed around the outside of each connecting head. Each annular insulating cover has a storage cavity inside. A triggering component is disposed inside the storage cavity. An insulating ring is fixedly installed in the middle of the storage cavity. Several limiting posts are spirally wound and fixed inside the threaded grooves. One end of each limiting post penetrates one side of the storage cavity. Each limiting post has a through hole inside. An opening and closing component is disposed inside the through hole. A heating component is disposed on the outer side of the connecting head near the annular insulating cover.
[0007] Furthermore, a valve actuator is provided inside the protective housing. A drive shaft is coaxially fixed to the output end of the valve actuator. The bottom end of the drive shaft is rotatably installed outside the bottom end of the protective housing. The bottom end of the drive shaft is coaxially fixed to the valve stem at the top of the valve body. A cable inlet tube is fixed through one side of the protective housing.
[0008] Furthermore, the opening and closing assembly includes a limiting slide post and a ball bearing. The limiting slide post is disposed inside the through hole, and the ball bearing is disposed outside the end of the limiting slide post near the threaded groove. A fixing ring is installed through and slidably sealed on the outside of the limiting slide post. The fixing ring is fixedly installed inside one side of the through hole, and a positioning plate is fixedly installed on the side of the ball bearing near the limiting slide post.
[0009] Furthermore, one side of the positioning disk is fixedly installed on the outside of one side of the limiting slide column, and a piston block is fixedly installed on the side of the limiting slide column away from the positioning disk. The piston block is slidably and sealingly installed inside one side of the through hole. An inlet channel is opened through the middle of the piston block. An outlet channel is opened through the inside of the ball, positioning disk and limiting slide column. One end of the outlet channel is connected to one end of the inlet channel.
[0010] Furthermore, a compression spring is sleeved on the outside of the limiting slide pin located between the positioning plate and the fixing ring, and the two ends of the compression spring are respectively fixedly installed on one side of the positioning plate and one side of the fixing ring.
[0011] Furthermore, the triggering component includes a sealing ring and an abutment ring. The sealing ring is slidably installed inside the storage cavity between the isolation ring and the annular isolation cover. The abutment ring is disposed outside the opening end of the connector. Several abutment rods are fixedly installed around the sealing ring at equal angles on the side of the sealing ring near the abutment ring.
[0012] Furthermore, one end of each of the several abutment rods is slidably mounted on one side of the annular isolation cover, and the through end of each of the several abutment rods is fixedly connected to one side of the abutment ring. A sealing ring is slidably and permeable to the outside of each abutment rod, and one side of the sealing ring is embedded in the outside of one side of the annular isolation cover. The isolation ring has several through openings at equal angles around the side away from the abutment ring.
[0013] Furthermore, each of the abutment rods is fitted with a tension spring through the outside of the storage cavity. The two ends of the tension spring are respectively fixedly installed on one side of the sealing ring and one side of the inner wall of the storage cavity. A sealing cap is threadedly connected to one side of the annular isolation cover.
[0014] Furthermore, the heating assembly includes several heating elements and a conductive ring. The heating elements are fixedly attached to one side of the connector at equal angles. The conductive ring is fixedly installed on one side of the annular isolation cover by a bracket. One end of each heating element is electrically connected to a conductive block. One end of each conductive block passes through the annular isolation cover and is electrically connected to one side of the conductive ring.
[0015] Furthermore, a mounting base is fixedly installed on the side of the contact head near the conductive ring, and a push switch is fixedly installed on the side of the mounting base. The input end of the push switch is electrically connected to a second wire, and the output end of the push switch is electrically connected to a first wire. The end of the first wire away from the push switch is electrically connected to one end of the conductive ring.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. By designing the triggering and opening / closing components, this intrinsically safe and explosion-proof wireless electric valve for mining can eliminate the reliance on traditional raw rubber tape for sealing. This effectively avoids the problems of raw rubber tape aging, embrittlement, and delamination in the high humidity, dust, and continuous vibration environments of underground mines. It not only avoids the risk of media leakage but also prevents detached fragments from entering the valve body and interfering with the transmission mechanism. At the same time, the triggering and opening / closing components can automatically and accurately fill the thread groove with sealing material, ensuring uniform sealing and stable explosion-proof performance. It eliminates the need for repeated manual winding operations in confined spaces and reduces equipment downtime caused by frequent disassembly and replacement of seals, significantly improving the long-term sealing reliability of the valve under harsh mining conditions.
[0018] 2. Through the design of the opening and closing components, this intrinsically safe and explosion-proof wireless electric valve for mining can automatically control the opening of the corresponding discharge channel according to the screw-in length of the external pipe joint. It releases sealant only in the threaded groove area of the pipe joint, keeping the discharge channel closed in uncontacted areas. This avoids ineffective discharge of sealant in areas where sealing is unnecessary, reducing waste. Simultaneously, it prevents excess sealant buildup from affecting thread engagement accuracy or polluting the environment, and ensures sufficient sealant on all actually contacting sealing surfaces to guarantee a sealing effect. This meets the high-efficiency, low-consumption, safe, and environmentally friendly requirements of mining equipment. During disassembly, the heating component can quickly soften the cured sealant, reducing the adhesion between the sealant and the threaded groove, avoiding thread damage or connector deformation caused by hard tightening. It also reduces the manual labor required for disassembly, adapting to the maintenance needs of confined spaces underground, resulting in excellent overall performance. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0020] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;
[0021] Figure 3 This is a three-dimensional structural diagram of the abutment rod and abutment ring of the present invention;
[0022] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;
[0023] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the connector and the annular insulating cover of the present invention;
[0024] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point C;
[0025] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the threaded groove and the limiting post of the present invention;
[0026] Figure 8 This is a partial cross-sectional three-dimensional structural diagram of the limiting slide and ball of the present invention;
[0027] Figure 9 A schematic diagram of the front section showing the connection between an existing short pipe joint and a connecting head;
[0028] Figure 10 This is a partial cross-sectional three-dimensional structural diagram of the connector and heating element of the present invention;
[0029] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point D.
[0030] The components represented by each number in the attached diagram are listed below: 1. Valve body; 2. Protective shell; 3. Connector; 4. Threaded groove; 5. Annular isolation cover; 6. Storage chamber; 7. Isolation ring; 8. Sealing ring; 9. Abutment rod; 10. Abutment ring; 11. Sealing ring; 12. Through port; 13. Limiting post; 14. Through hole; 15. Fixing ring; 16. Limiting slide; 17. Positioning plate; 18. Ball bearing; 19. Piston block; 20. Discharge channel; 21. Inlet channel; 22. Compression spring; 23. Tension spring; 24. Sealing cover; 25. Heating element; 26. Conductor block; 27. Conductor ring; 28. Mounting base; 29. First wire; 30. Push switch; 31. Second wire; 32. Fixing base; 33. Valve actuator; 34. Drive shaft; 35. Cable inlet tube. Detailed Implementation
[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] Example 1: Please refer to Figure 1 - Figure 9 A mine-use explosion-proof and intrinsically safe wireless electric valve includes 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. 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 outside of the connector 3 is fitted, fixed and sealed with an annular isolation cover 5. The inside of the annular isolation cover 5 is provided with a storage cavity 6. The storage cavity 6 is provided with a trigger component. An isolation ring 7 is fixedly installed in the middle position inside the storage cavity 6. Several limiting posts 13 are spirally wrapped and fixed inside the threaded groove 4. One end of each limiting post 13 is provided inside one side of the storage cavity 6. The inside of each limiting post 13 is provided with a through hole 14. The inside of each through hole 14 is provided with an opening and closing component.
[0033] The protective housing 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 housing 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 housing 2.
[0034] The opening and closing assembly includes a limiting slide post 16 and a ball bearing 18. The limiting slide post 16 is located inside the through hole 14, and the ball bearing 18 is located outside the end of the limiting slide post 16 near the threaded groove 4. A retaining ring 15 is installed through the outer side of the limiting slide post 16 in a sliding seal. The retaining 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 bearing 18 near the limiting slide post 16.
[0035] One side of the positioning plate 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 plate 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 plate 17 and the limiting slide column 16. One end of the outlet channel 20 is connected to one end of the inlet channel 21.
[0036] A compression spring 22 is sleeved on the outside of the limiting slide column 16 located between the positioning plate 17 and the fixing ring 15. 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.
[0037] The triggering assembly includes a sealing ring 8 and an abutment ring 10. The sealing ring 8 is slidably installed in the storage cavity 6 inside 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.
[0038] One end of each of the several abutment rods 9 is slidably installed on 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. Several through holes 12 are opened at equal angles around the side of the isolation ring 7 away from the abutment ring 10.
[0039] Each contact rod 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.
[0040] In this embodiment, the automatic and precise filling of sealant is achieved when the pipe joint and the connector 3 are connected by the coordinated action of the triggering component and the opening and closing component. At the same time, the basic on and off function of the valve is ensured by the valve actuator 33 inside the protective shell 2. The specific working process is as follows:
[0041] When no pipe joints are connected, the entire device is in an initial standby state:
[0042] Triggering component: The tension spring 23 is initially in a contracted state, and several abutment rods 9 extend outward from the annular isolation cover 5. The abutment ring 10 is located outside the opening end of the connecting head 3 (protruding from the end face of the connecting head 3), forming a clear contact trigger end. The sealing cover 24 on one side of the annular isolation cover 5 is tightened, and the storage cavity 6 stores a sufficient amount of existing sealant. The sealant can be replenished later by removing the sealing cover 24.
[0043] Opening and closing components: The compression spring 22 is initially in a naturally relaxed state, pushing the positioning plate 17 and the ball 18 to extend towards the threaded groove 4, so that part of the ball 18 is exposed on the inner wall of the threaded groove 4; at the same time, the positioning plate 17 drives the limiting slide 16 and the piston block 19 to maintain their initial positions in the through hole 14, so that the inlet channel 21 of the piston block 19 is not connected to the storage cavity 6, the discharge channel 20 is closed, and the sealant cannot be discharged.
[0044] Valve drive structure: The existing valve actuator 33 inside the protective shell 2 is connected to the intrinsically safe power supply and control signal for mining through the cable inlet tube 35. The drive shaft 34 is fixed coaxially with the valve stem of the valve body 1. After sealing is completed, the existing wireless control module can be used to control the valve actuator 33 to be powered on and started. The valve actuator 33 drives the drive shaft 34 to rotate, thereby realizing the on and off control of the valve body 1.
[0045] It should also be noted that when the external pipe joint is screwed into the threaded groove 4 of the connector 3, the device triggers the following actions in sequence:
[0046] Step 1: The trigger component starts. After the pipe joint is screwed in to a certain extent, its end first contacts the abutment ring 10 and applies axial thrust. After the abutment ring 10 is subjected to force, it drives several abutment rods 9 to slide into the annular isolation cover 5. The tension spring 23 is stretched and deformed. The abutment rods 9 simultaneously push the sealing ring 8 to slide in the storage cavity 6. Under the squeezing action of the sealing ring 8, the sealant in the storage cavity 6 enters the through hole 14 of the limiting post 13 through the guide port 12, completing the pressurization and passage preparation of the sealant.
[0047] Step 2: The opening and closing components precisely discharge the sealant, allowing the threaded sealing pipe joint to continue screwing in along the thread groove 4. The threaded protrusions on the outer wall of the pipe joint will contact the corresponding ball 18 and apply radial pressure. After being subjected to force, the ball 18 retracts into the through hole 14, causing the positioning plate 17 to compress the spring 22, while simultaneously pushing the limiting slide 16 and piston block 19 to slide towards the storage cavity 6. When the piston block 19 slides to the inside of one side of the storage cavity 6, the pressurized sealant in the storage cavity 6 enters the discharge channel 20 through the inlet channel 21 and is discharged from the ball 18 to the pipe joint and thread groove 4. The contact gap is filled to achieve a seal at this location, enabling this intrinsically safe and explosion-proof wireless electric valve for mining to be used without relying on traditional raw rubber tape for sealing. This effectively avoids the problems of raw rubber tape aging, embrittlement, and delamination in the high humidity, dust, and continuous vibration environment of underground mines. It not only avoids the risk of media leakage but also prevents the falling debris from entering the valve body 1 and interfering with the operation of the transmission mechanism. At the same time, it eliminates the need for manual repeated wrapping operations in confined spaces and reduces equipment downtime caused by frequent disassembly and replacement of seals, significantly improving the long-term sealing reliability of the valve under harsh mining conditions.
[0048] Meanwhile, since the pipe fitting only contacts the balls 18 on the screw-in path, the balls 18 in the unscrewed areas remain extended under the action of the compression spring 22, the piston block 19 does not move, the inlet channel 21 is not open, and the sealant is only discharged in the threaded groove 4 area where the pipe fitting contacts (this can be achieved by...). Figure 9 The connection status between the short pipe joint and the connector 3 is clearly shown. Due to the limited screw-in length of the short pipe joint, its outer wall can only touch a part of the thread groove 4 near the opening end. The part of the thread groove 4 near the inner side is not screwed in by the pipe joint. The corresponding ball 18 is always kept in the extended state under the action of the compression spring 22. The piston block 19 does not move, the inlet channel 21 is not open, and the adhesive will not fill these areas. This avoids ineffective waste and prevents excess sealant from accumulating, affecting the thread engagement accuracy or polluting the environment. It also ensures that all actual contact sealing surfaces have sufficient sealant to guarantee the sealing effect, which meets the high-efficiency, low-consumption, safe and environmentally friendly use requirements of mining equipment.
[0049] It should also be noted that when disassembling the pipe joint, first start the heating unit, then rotate the pipe joint in the opposite direction to remove it from the threaded groove 4.
[0050] After the pipe joint disengages from the ball bearing 18, the compression spring 22 relaxes, pushing the positioning plate 17, ball bearing 18, limit slide 16, and piston block 19 back to their original positions. The inlet channel 21 is no longer connected to the inside of the storage chamber 6, and the outlet channel 20 is closed. At the same time, the pipe joint disengages from the abutment ring 10, the tension spring 23 relaxes, pulling the abutment rod 9 and the abutment ring 10 back to their original positions. The sealing ring 8 re-attaches to the isolation ring 7, the opening 12 closes, the sealing material in the storage chamber 6 stops being supplied, and the device returns to its initial standby state, ready to wait for the next pipe connection.
[0051] Example 2: Please refer to Figure 10 - Figure 11 This embodiment further illustrates Example 1, wherein heating components are provided on the outer side of the connection head 3 near the annular isolation cover 5.
[0052] 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.
[0053] A mounting base 28 is fixedly installed on the side of the connector 3 near the conductive ring 27. A push switch 30 is fixedly installed on the side of the mounting base 28. The input end of the push switch 30 is electrically connected to a second wire 31, and 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 conductive ring 27.
[0054] In this embodiment, when it is necessary to disassemble the pipe joint, the heating component is first activated to soften and cure the sealant. The specific steps are as follows:
[0055] Step 1: Triggering heating. In the confined space underground, maintenance personnel press the push switch 30 on the mounting base 28 to close the internal contacts of the switch. At this time, the current from the intrinsically safe power supply for the mine flows into the push switch 30 through the second wire 31. After the switch closes, the current is transmitted to the conduction ring 27 through the first wire 29. The conduction ring 27 evenly distributes the current to each conduction block 26, and finally the current flows into the corresponding heating element 25, and the heating component officially starts working.
[0056] Step 2: Heat transfer. After being powered on, the heating element 25 generates heat. The cured sealant in the thread groove 4 absorbs the heat, and its physical state changes from solid to semi-fluid. The adhesion between the sealant and the outer wall of the pipe joint and the inner wall of the thread groove 4 is greatly reduced, avoiding the problems of sealant adhesion leading to thread tooth damage and connector 3 deformation during traditional hard-tightening disassembly.
[0057] Step 3: Collaborative disassembly. After the sealant softens (in the underground environment, heating element 25 can soften the sealant in 1-2 minutes), maintenance personnel should rotate the pipe joint in the opposite direction to allow it to exit along the threaded groove 4. During the pipe joint exit process, the softened sealant will no longer generate strong adhesive resistance and can be easily unscrewed, protecting the structural integrity of the threaded groove 4 and the pipe joint. Finally, after the pipe joint is completely removed, release the pressure switch 30 to disconnect the circuit. Heating element 25 will stop heating to avoid overheating of the connector 3 due to continuous heating, thus ensuring overall operational stability.
[0058] It should also be noted that when the pipe joint is unscrewed in the reverse direction and disengages from the abutment ring 10, it will gradually withdraw along the threaded groove 4 from the front section near the opening end of the connector 3 to the rear section. At the same time, the tension spring 23 returns to its contracted state, pulling the abutment rod 9 and the sealing ring 8 back 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. This negative pressure generates suction through the discharge channel 20 and the inlet channel 21, drawing out the semi-fluid sealant remaining in the threaded groove 4.
[0059] It should be noted that the range of negative pressure suction is directly related to the timing of pipe joint withdrawal and the reset state of the opening and closing components: when the pipe joint withdraws from the front threaded groove 4 first, the corresponding ball bearing 18 will lose the resistance of the pipe joint first and extend towards the threaded groove 4 under the action of the compression spring 22, simultaneously pushing the piston block 19 back to its initial position, thus disconnecting the inlet channel 21 from the inside of the storage cavity 6. That is, the passage of the front threaded groove 4 is closed, and the negative pressure suction cannot be transmitted to this area. However, for the rear threaded groove 4, since the pipe joint withdraws from this area later, the reset action of the ball bearing 18 is briefly delayed. At the moment when the sealing ring 8 rebounds and forms negative pressure, the piston corresponding to the rear threaded groove 4... Block 19 has not yet been fully reset, and the inlet channel 21 is still in a brief conductive state. The negative pressure suction can pass through the conductive passage to draw the residual sealant in the threaded groove 4, which is still in a fluid state due to heating, back into the negative pressure area in the storage chamber 6 through the discharge channel 20 and the inlet channel 21. This process can not only recover the reusable fluid sealant in the rear section, reducing the waste and replenishment frequency of sealant in the mine, but also specifically solve the risk of the residual sealant in the threaded groove 4 (located on the side of the connector 3 away from the valve body 1) solidifying and blocking the passage. This clears the way for the smooth discharge of sealant during the next pipeline connection and reduces the cleaning difficulty during the next assembly.
[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mine-used explosion-proof and intrinsically safe radio motor valve, comprising a valve body (1), a fixed seat (32) fixed at the top end of the valve body (1), and a protective shell (2) fixed at the top end of the fixed seat (32), characterized in that: Both ends of the valve body (1) are fixed with the connecting head (3), the inner wall of the connecting head (3) is spirally provided with the thread groove (4), the outer part of the connecting head (3) is fixedly sleeved and sealingly installed with the annular isolation cover (5), the inside of the annular isolation cover (5) is provided with the storage cavity (6), the inside of the storage cavity (6) is provided with the trigger assembly, the inside of the storage cavity (6) is fixedly installed with the isolation ring (7) at the middle position, the inside of the thread groove (4) is spirally penetrated and fixed with a plurality of limiting columns (13), one end of the plurality of limiting columns (13) is penetratingly arranged in the inside of one side of the storage cavity (6), the inside of each limiting column (13) is penetratingly provided with the through hole (14), the inside of the through hole (14) is provided with the opening and closing assembly, the outside of the connecting head (3) near the annular isolation cover (5) is provided with the heating assembly. The opening and closing assembly comprises the limiting slide column (16) and the ball (18), the limiting slide column (16) is arranged in the inside of the through hole (14), the ball (18) is arranged at the outside of one end of the limiting slide column (16) near the thread groove (4), the outside of the limiting slide column (16) is penetratingly and slidingly sealingly installed with the fixed ring (15), the fixed ring (15) is fixedly installed in the inside of one side of the through hole (14), the ball (18) is fixedly installed with the positioning disc (17) at the side near the limiting slide column (16). The trigger assembly comprises the sealing ring (8) and the abutting ring (10), the sealing ring (8) is sealingly and slidingly installed in the inside of the storage cavity (6) between the isolation ring (7) and the annular isolation cover (5), the abutting ring (10) is arranged at the opening end of the connecting head (3), the sealing ring (8) is fixedly installed with a plurality of abutting rods (9) at the equiangular positions of the side near the abutting ring (10).
2. A mine-used explosion-proof and intrinsically safe radio motor valve according to claim 1, characterized in that: The inside of the protective shell (2) is provided with the valve driver (33), the output end of the valve driver (33) is coaxially fixed with the driving shaft (34), the bottom end of the driving shaft (34) is rotatingly penetratingly installed at the outside of the bottom end of the protective shell (2), the bottom end of the driving shaft (34) is coaxially fixed with the valve rod at the top end of the valve body (1), one side of the protective shell (2) is penetratingly fixed with the cable inlet pipe (35).
3. The mine-used explosion-proof and intrinsically safe radio motor valve according to claim 1, characterized in that: One side of the positioning disc (17) is fixedly installed at the outside of one side of the limiting slide column (16), the side away from the positioning disc (17) of the limiting slide column (16) is fixedly installed with the piston block (19), the piston block (19) is slidingly and sealingly installed in the inside of one side of the through hole (14), the inside of the piston block (19) is penetratingly provided with the inlet channel (21) at the middle position, the inside of the ball (18), the positioning disc (17) and the limiting slide column (16) is penetratingly provided with the discharge channel (20), one end of the discharge channel (20) is in conductive connection with one end of the inlet channel (21).
4. A mine-used explosion-proof and intrinsically safe radio motor valve according to claim 1, characterized in that: The limiting slide column (16) is externally sleeved with a compression spring (22) between the positioning disc (17) and the fixed ring (15), and two ends of the compression spring (22) are fixedly installed on one side of the positioning disc (17) and one side of the fixed ring (15) respectively.
5. A flame-proof and intrinsically safe radio electric valve for mine according to claim 1, characterized in that: One end of each of the plurality of abutting rods (9) penetrates and is slidingly installed on one side of the annular isolation cover (5), and the penetrating end of each of the plurality of abutting rods (9) is fixedly connected with one side of the abutting ring (10), and the outside of each of the plurality of abutting rods (9) penetrates and is sealingly slidingly provided with a sealing ring (11), one side of the sealing ring (11) is embeddedly installed on the outside of one side of the annular isolation cover (5), and the isolation ring (7) is equiangularly and penetratingly provided with a plurality of through ports (12) away from one side of the abutting ring (10).
6. A mine-used explosion-proof and intrinsically safe radio motor valve according to claim 5, characterized in that: The outside of each of the plurality of abutting rods (9) located in the storage cavity (6) is penetratingly sleeved with a tension spring (23), and two ends of the tension spring (23) are fixedly installed on one side of the sealing ring (8) and one side of the inner wall of the storage cavity (6) respectively.
7. A flame-proof and intrinsically safe radio electric valve for mine according to claim 1, characterized in that: The heating assembly comprises a plurality of heating pieces (25) and a through ring (27), the plurality of heating pieces (25) are equiangularly and fixedly attached to the outside of one side of the connecting head (3), the through ring (27) is fixedly installed on the outside of one side of the annular isolation cover (5) through a support, one end of each of the plurality of heating pieces (25) is electrically connected and fixed with a through block (26), and one end of the through block (26) penetrates and is electrically connected and fixed with one side of the annular isolation cover (5) and the through ring (27).
8. A mine-used explosion-proof and intrinsically safe radio motor valve according to claim 7, characterized in that: The connecting head (3) is fixedly installed with a mounting seat (28) on the outside of one side close to the through ring (27), the mounting seat (28) is fixedly installed with a press switch (30) on the outside of one side, the input end of the press switch (30) is electrically connected and fixed with a second lead wire (31), the output end of the press switch (30) is electrically connected and fixed with a first lead wire (29), and one end of the first lead wire (29) away from the press switch (30) is electrically connected and fixed with one end of the through ring (27).
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