An anti-lock high-temperature butterfly valve and its operation method

Abstract

The present invention belongs to the technical field of valves, and particularly relates to an anti-lock high-temperature butterfly valve, which includes a valve seat, comprising: a valve stem seat, including an upper valve stem seat and a lower valve stem seat, which are respectively arranged on both sides of the valve body; a valve stem, one end of which is arranged above the upper valve seat, and the other end respectively penetrates through the upper valve stem seat, the valve seat and the lower valve stem seat; a valve plate, sleeved on the valve stem and located within the valve seat; and two anti-lock structures, which are respectively arranged between the upper valve seat and the valve stem and between the lower valve seat and the valve stem; wherein, an electric actuator for driving the valve stem is provided at the top of the valve stem, and the anti-lock structure is used to prevent the valve stem from being stuck; the beneficial effects of the present invention are: preventing the valve stem from being stuck, having extremely strong sealing performance, and increasing the force on the valve stem.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to an anti-lock high-temperature butterfly valve and an operation method thereof. Background Art

[0002] A butterfly valve refers to a rotary valve in which a valve shaft drives a valve plate to rotate to open or close, and can connect or cut off a fluid passage. It is divided into a normal-temperature butterfly valve and a high-temperature butterfly valve according to the temperature of the medium flowing through the valve.

[0003] In the prior art, most of the valve stems and valve stem seats are not provided with an anti-lock structure, resulting in external corrosive liquid flowing into the space between the valve stem and the valve stem seat, causing the valve stem to be stuck and unable to open the valve. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an anti-lock high-temperature butterfly valve and an operation method thereof to solve the above problems.

[0005] In view of this, the present invention provides an anti-lock high-temperature butterfly valve, including a valve seat, comprising:

[0006] A valve stem seat, including an upper valve stem seat and a lower valve stem seat, which are respectively arranged on both sides of the valve body;

[0007] A valve stem, one end of which is arranged above the upper valve seat, and the other end respectively penetrates through the upper valve stem seat, the valve seat and the lower valve stem seat;

[0008] A valve plate, sleeved on the valve stem and located inside the valve seat;

[0009] And two anti-lock structures, which are respectively arranged between the upper valve seat and the valve stem and between the lower valve seat and the valve stem;

[0010] Wherein, an electric actuator for driving the valve stem is provided at the top end of the valve stem, and the anti-lock structure is used to prevent the valve stem from being stuck.

[0011] By adopting the above technical solution, through the setting of the anti-lock structure, it can fill the space between the valve stem and the valve stem seat, reduce the contact surface between the valve stem and the valve stem seat, reduce the chance of wear, and also reduce the hardening of the valve stem caused by external corrosive liquid flowing into the space between the valve stem and the valve stem seat, resulting in the inability to open.

[0012] In the above technical solution, further, the anti-lock structure includes:

[0013] A plurality of graphite packings, which are evenly spaced and sleeved on the outer side wall of the valve stem, and the outer side wall of the graphite packing abuts against the inner wall of the valve stem seat;

[0014] A plurality of self-tightening springs, which are respectively arranged between two adjacent graphite packings;

[0015] and two glands, which are respectively pressed on the upper valve stem seat and the lower valve stem seat;

[0016] Among them, one of the graphite packings that are sleeved at intervals and are closest to the valve body contacts the inner bottom of the valve stem seat, and the gland is pressed onto the graphite packing.

[0017] In the present technical solution, the graphite packing contacts the inner bottom of the valve stem seat, thereby preventing the valve stem from hardening due to leakage out of the valve seat. By arranging a self-tightening spring between the graphite packings, the wear of the graphite packing can be automatically replenished, thereby enhancing the leakage prevention and wear resistance.

[0018] In the above technical solution, further comprising:

[0019] The lower bracket is sleeved on the outer wall of the valve stem at the end away from the actuator;

[0020] An end cover, arranged at the bottom end of the valve stem;

[0021] The bearing is sleeved on the outer wall of the valve stem, and the outer wall of the bearing is embedded in the inner wall of the lower bracket;

[0022] and a cap, which is sleeved on the outer side wall of the bottom end of the valve stem, and the bottom end of the cap abuts against the end cover;

[0023] Wherein, the lower bracket is connected to the end cover by bolts.

[0024] In this technical solution, the positioning of the valve stem is ensured by the support of an external bearing, and radial displacement will not occur due to the push of the medium force, thereby increasing the stability of the valve plate opening and closing. Since the valve stem is supported by an external bearing, the friction coefficient is small, reducing the opening and closing torque.

[0025] In the above technical solution, further comprising:

[0026] Two pressure balancing rings are respectively attached to both sides of the valve plate. Both pressure balancing rings are arranged on the inner wall of the valve seat, and the pressure balancing rings include a fixed half ring fixedly connected to the inner wall of the valve seat and a sliding half ring moving away from the valve plate;

[0027] A sliding connection structure, one end of which is connected to the sliding half ring, and the other end of which is connected to the inner wall of the valve seat;

[0028] and two adsorption structures, which are respectively arranged on the sides of the two sliding half rings away from the valve plate, and the adsorption structures are arranged on the inner wall of the valve body;

[0029] Among them, the fixed half ring and the sliding half ring form a complete circular ring, and the positions of the fixed half ring and the sliding half ring of the two pressure balance rings are opposite. When the valve plate rotates, the two sliding half rings move toward the adsorption structure through the sliding connection structure, so that the adsorption structure adsorbs the sliding half rings. When the valve plate rotates back to its original position, the adsorption structure releases the sliding half ring, and the sliding connection structure moves the sliding half ring back to the initial position. The sliding half ring is made of magnetically attractable material.

[0030] In the present technical solution, by setting the fixed half ring and the sliding half ring, the valve plate can be made to contact the circular ring composed of the fixed half ring and the sliding half ring, thereby forming the first seal of the valve plate and greatly improving the sealing performance. When the fluid impacts the valve plate, the fixed half ring and the sliding half ring can greatly reduce the force of the valve plate on the valve stem, thereby better protecting the valve stem from deformation. By setting the sliding connection structure, the sliding half ring can be moved when the valve plate rotates, thereby allowing the valve plate to open. By setting the adsorption structure, the sliding half ring can be adsorbed, thereby preventing the valve plate from being blocked by the sliding half ring when it is closed.

[0031] In the above technical solution, the sliding connection structure further comprises:

[0032] A sliding block, one end of which is connected to the side of the sliding half ring facing the valve seat, and the other end of which slides in the valve seat;

[0033] Among them, a sliding groove for the sliding block to slide is provided on the inner wall of the valve seat, and the sliding groove extends toward one side of the adsorption structure. A fixed block is provided in the sliding groove, and the fixed block is located on the side wall of the sliding groove away from the sliding block. An elastic member is provided between the fixed block and the sliding block, and the elastic member is located in the sliding groove.

[0034] In the technical solution, by setting the sliding block, the sliding half ring can slide along the direction of the sliding groove, and by setting the fixed block, the elastic member can rebound the sliding half ring through elastic force.

[0035] In the above technical solution, the adsorption structure further comprises:

[0036] Two half-ring fixing blocks are respectively arranged on one side of the sliding half-ring away from the valve plate;

[0037] and a plurality of electromagnet parts, the driving end of which is arranged on the outer wall of the valve seat, and the output end of which penetrates the valve seat and is arranged in the semi-ring fixing block;

[0038] Wherein, a plurality of the electromagnet parts are arranged at intervals in the semi-ring fixing block, and the attraction end of the electromagnet part is connected to the semi-ring fixing block toward one side of the sliding semi-ring.

[0039] In this technical solution, through the setting of the semi-circular fixing block, a number of electromagnet components can be placed. Through the setting of the electromagnet components, the sliding semi-ring can be adsorbed, thereby preventing the sliding semi-ring from moving back to its original position when the valve plate has not rotated back.

[0040] In the above technical solution, further, a placement groove is provided on the outer side wall of the valve plate, a sealing groove corresponding to the placement groove is provided on the inner wall of the valve body, a high-temperature and corrosion-resistant air cushion is provided in the placement groove, an air charging and suction pump is provided on the outer side wall of the valve body, a connecting pipe that penetrates the upper valve rod seat and abuts against the outer side wall of the valve rod is provided on the output of the air charging and suction pump, a first channel corresponding to the connecting pipe is provided on the outer side wall of the valve rod, the first channel extends towards the valve rod at the end away from the connecting pipe, and a second channel that penetrates the valve plate and communicates with the high-temperature and corrosion-resistant air cushion is provided at the end of the first channel away from the connecting pipe.

[0041] In this technical solution, through the setting of the connecting pipe, the first channel and the second channel, the gas of the air charging and suction pump can be in an inflated state and an adsorbed state for the high-temperature and corrosion-resistant air cushion, so as to achieve the filling and sealing of the sealing groove and closing.

[0042] In the above technical solution, further, small self-priming spray pumps are provided on both sides of the outer side wall of the valve body, the side wall of the sealing groove is communicated with the sliding groove, water outlet pipes are provided on the output ends of the two small self-priming spray pumps, the two water outlet pipes penetrate the valve seat and are communicated with the side wall of the sealing groove facing the sliding groove, and suction pipes communicated with the inside of the sealing groove are provided on the input ends of the small self-priming spray pumps.

[0043] In this technical solution, through the setting of the water outlet pipe, the small self-priming spray pump can clean the sliding groove to prevent dirt and impurities from jamming the sliding block. When the sliding semi-ring abuts against the valve plate, the small self-priming spray pump continues to spray water to clean the sealing groove. And through the setting of the suction pipe, the dirt in the sealing groove can be removed to prevent the high-temperature and corrosion-resistant air cushion from being worn and the sealing from being insufficient.

[0044] In the above technical solution, further, the following steps are included:

[0045] S1: First, turn on the air charging and suction pump to suck air, suck out the air in the high-temperature and corrosion-resistant air cushion, and make the high-temperature and corrosion-resistant air cushion sink into the placement groove;

[0046] S2: Start the valve rod electric actuator to rotate the valve rod. The valve rod drives the sliding semi-rings on both sides to move, and at the same time start the adsorption structure to adsorb the sliding semi-rings. At this time, the valve is in an open state;

[0047] S3: When closing the valve, control the small self-priming spray pump to spray water to clean the chute, then control the adsorption structure to close, and the slider rebounds under the action of the elastic member, so that the sliding semi-ring abuts against the valve plate;

[0048] S4: Continuously spray water from the small self-priming spray pump, and at the same time start the water absorption effect of the small self-priming spray pump, so as to achieve the cleaning effect and clean the sealing groove;

[0049] S5: Open the air outlet of the air charging and suction pump, inflate the high-temperature and corrosion-resistant air cushion, and start to fill it into the sealing groove to complete the valve closing.

[0050] In this technical solution, through the setting of S1, the valve plate can be opened without causing sealing wear. Through the setting of S2, the valve can be automatically opened, and at the same time, the first sealing and pressure sharing of the sliding semi-ring can be obtained, and it can also be opened. Through the setting of S3, the slider can be prevented from being stuck, and the sealing performance of the valve plate can be increased and the pressure can be shared. Through the setting of S4, the wear of the high-temperature and corrosion-resistant air cushion during inflation can be prevented, and the sealing effect of the high-temperature and corrosion-resistant air cushion during inflation can also be prevented from decreasing.

[0051] The beneficial effects of the present invention are:

[0052] 1. Through the setting of the anti-lock structure, the valve stem can be prevented from being stuck.

[0053] 2. Through the cooperation of the pressure balance ring, the sliding connection structure and the adsorption structure, the force on the valve stem can be increased and the sealing performance of the valve can be increased. Brief Description of the Drawings

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0055] Figure 1 It is a schematic structural diagram of the specific embodiment of the present invention;

[0056] Figure 2 It is a cross-sectional view of the overall structure of the specific embodiment of the present invention;

[0057] Figure 3 It is a partial cross-sectional view of the specific embodiment of the present invention;

[0058] Figure 4 It is the specific embodiment of the present invention Figure 2 The enlarged view at A in the middle.

[0059] Figure numerals: 1. valve body; 2. upper valve stem seat; 3. lower valve stem seat; 4. valve stem; 5. valve plate; 6.; 7. graphite packing; 8. self-tightening spring; 9. pressure cover; 10. lower bracket; 11. end cover; 12. bearing; 13. cap; 14. fixed half ring; 15. sliding half ring; 16. slide groove; 17. elastic part; 18. half ring fixing block; 19. electromagnet part; 20. placement groove; 21. sealing groove; 22. high temperature resistant and anti-corrosion air cushion; 23. filling and suction pump; 24. connecting pipe; 25. first channel; 26. second channel; 27. small self-priming water spray pump; 28. water outlet pipe; 29. ​​water suction pipe. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0061] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the previously associated objects are an "or" relationship of an anti-lock high-temperature butterfly valve and its operating method.

[0063] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing the present application and simplifying the description. Without contrary explanations, these orientation terms do not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0064] It should be noted that in the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0065] Embodiment 1:

[0066] This embodiment provides an anti-lock high-temperature butterfly valve, including a valve seat, comprising:

[0067] A valve stem seat, including an upper valve stem seat 2 and a lower valve stem seat 3, which are respectively arranged on both sides of the valve body 1;

[0068] A valve stem 4, one end of which is arranged above the upper valve seat, and the other end respectively penetrates through the upper valve stem seat 2, the valve seat and the lower valve stem seat 3;

[0069] A valve plate 5, sleeved on the valve stem 4 and located inside the valve seat;

[0070] And two anti-lock structures, which are respectively arranged between the upper valve seat and the valve stem 4 and between the lower valve seat and the valve stem 4;

[0071] Wherein, an electric actuator 6 for driving the valve stem is provided at the top of the valve stem 4, and the anti-lock structure is used to prevent the valve stem 4 from getting stuck;

[0072] Through the setting of the anti-lock structure, it can be filled between the valve stem 4 and the valve stem seat, reducing the contact surface between the valve stem 4 and the valve stem seat, reducing the probability of wear, and also reducing the inflow of external corrosive liquid between the valve stem 4 and the valve stem seat, resulting in hardening of the valve stem 4 and the inability to open.

[0073] Embodiment 2:

[0074] In this embodiment, in addition to including the structural features of the foregoing embodiment, further, the anti-lock structure includes:

[0075] A number of graphite packings 7 are evenly sleeved on the outer side wall of the valve stem 4, and the outer side wall of the graphite packing 7 abuts against the inner wall of the valve stem seat;

[0076] A number of self-tightening springs 8 are respectively arranged between two adjacent graphite packings 7;

[0077] And two gland covers 9 are respectively pressed on the upper valve stem seat 2 and the lower valve stem seat 3;

[0078] Among them, one of the several spaced graphite packings 7 closest to the valve body 1 abuts against the inner bottom of the valve stem seat, and the gland cover 9 is pressed on the graphite packing 7;

[0079] By the graphite packing 7 abutting against the inner bottom of the valve stem seat, it can prevent the hardening of the valve stem 4 caused by the leakage flowing out of the valve seat. By arranging the self-tightening spring 8 between the graphite packings 7, it can automatically supply when the graphite packing 7 wears, enhancing the anti-leakage property and wear resistance.

[0080] Embodiment 3:

[0081] In this embodiment, in addition to including the structural features of the foregoing embodiment, further, it further includes:

[0082] A lower bracket 10 is sleeved on the outer side wall of the end of the valve stem 4 away from the actuator;

[0083] An end cover 11 is arranged at the bottom end of the valve stem 4;

[0084] A bearing 12 is sleeved on the outer side wall of the valve stem 4, and the outer side wall of the bearing 12 is embedded in the inner wall of the lower bracket 10;

[0085] And a union nut 13 is sleeved on the outer side wall of the bottom end of the valve stem 4, and the bottom end of the union nut 13 abuts against the end cover 11;

[0086] Among them, the lower bracket 10 and the end cover 11 are connected by bolts

[0087] The positioning of the valve stem 4 is ensured by the support of the external bearing 12, preventing radial displacement caused by the pushing force of the medium, and increasing the stability of the opening and closing of the valve plate 5. Since the valve stem 4 is supported by the external bearing 12, the friction coefficient is small, reducing the opening and closing torque.

[0088] Embodiment 4:

[0089] In this embodiment, in addition to including the structural features of the foregoing embodiments, it further includes:

[0090] Two pressure balance rings, respectively attached to both sides of the valve plate 5. Both pressure balance rings are arranged on the inner wall of the valve seat, and the pressure balance ring includes a fixed half-ring 14 fixedly connected to the inner wall of the valve seat and a sliding half-ring 15 that moves away from the valve plate 5;

[0091] A sliding connection structure, one end of which is connected to the sliding half-ring 15 and the other end is slidably connected to the inner wall of the valve seat;

[0092] And two adsorption structures, respectively arranged on the sides of the two sliding half-rings 15 away from the valve plate 5, and the adsorption structures are arranged on the inner wall of the valve body 1;

[0093] Wherein, the fixed half-ring 14 and the sliding half-ring 15 form a complete ring, and the positions of the fixed half-rings 14 and the sliding half-rings 15 of the two pressure balance rings are set oppositely. When the valve plate 5 rotates, the two sliding half-rings 15 move towards the adsorption structure through the sliding connection structure, so that the adsorption structure adsorbs the sliding half-ring 15. When the valve plate 5 rotates back to its original position, the adsorption structure releases the sliding half-ring 15, and the sliding connection structure makes the sliding half-ring 15 move back to its initial position. The sliding half-ring 15 is made of a magnetically attractable material;

[0094] Through the setting of the fixed half-ring 14 and the sliding half-ring 15, the valve plate 5 can be made to abut against the ring formed by the fixed half-ring 14 and the sliding half-ring 15, thereby forming the first seal of the valve plate 5, greatly increasing the sealing performance. When the fluid impacts the valve plate 5, the fixed half-ring 14 and the sliding half-ring 15 can greatly reduce the force exerted by the valve plate 5 on the valve stem 4, thereby better protecting the valve stem 4 from being deformed. Through the setting of the sliding connection structure, the sliding half-ring 15 can move when the valve plate 5 rotates, so that the valve plate 5 can be opened. Through the setting of the adsorption structure, the sliding half-ring 15 can be adsorbed, thereby preventing the valve plate 5 from being blocked by the sliding half-ring 15 when it closes.

[0095] Embodiment 5:

[0096] In this embodiment, in addition to including the structural features of the foregoing embodiments, further the sliding connection structure includes:

[0097] A sliding block, one end of which is connected to the side of the sliding half ring 15 facing the valve seat, and the other end of which slides in the valve seat;

[0098] The inner wall of the valve seat is provided with a slide groove 16 for the sliding block to slide, and the slide groove 16 extends toward one side of the adsorption structure, a fixed block is provided in the slide groove 16, and the fixed block is located on the side wall of the slide groove 16 away from the sliding block, an elastic member 17 is provided between the fixed block and the sliding block, and the elastic member 17 is located in the slide groove 16;

[0099] By setting the sliding block, the sliding half ring 15 can slide along the direction of the sliding groove 16, and by setting the fixing block, the elastic member 17 can rebound the sliding half ring 15 through elastic force.

[0100] Embodiment 6:

[0101] In this embodiment, in addition to the structural features of the aforementioned embodiment, the adsorption structure further includes:

[0102] Two half-ring fixing blocks 18 are respectively arranged on one side of the sliding half-ring 15 away from the valve plate 5;

[0103] and a plurality of electromagnet parts 19, the driving end of which is arranged on the outer wall of the valve seat, and the output end of which penetrates the valve seat and is arranged in the semi-ring fixing block 18;

[0104] Among them, a plurality of the electromagnet members 19 are arranged at intervals in the semi-ring fixing block 18, and the attraction end of the electromagnet member 19 is connected to the semi-ring fixing block 18 and faces one side of the sliding semi-ring 15;

[0105] By setting the semi-ring fixing block 18, several electromagnet parts 19 can be placed. By setting the electromagnet part 19, the sliding semi-ring 15 can be adsorbed, thereby preventing the sliding semi-ring 15 from moving to its original position when the valve plate 5 is not turned back. The output end of the above-mentioned electromagnet part 19 is flush with the side wall of the semi-ring fixing block 18, so that after the sliding semi-ring 15 is adsorbed, the semi-ring fixing block 18 and the sliding semi-ring 15 are fitted to reduce the impact from the fluid. The protruding part in the accompanying drawing is only for the convenience of presenting the position of the electromagnet part 19.

[0106] Embodiment 7:

[0107] In this embodiment, in addition to including the structural features of the foregoing embodiment, further, a placement groove 20 is provided on the outer side wall of the valve plate 5, a sealing groove 21 corresponding to the placement groove 20 is provided on the inner wall of the valve body 1, a high-temperature resistant and corrosion-proof air cushion 22 is provided in the placement groove 20, an air charging and suction pump 23 is provided on the outer side wall of the valve body 1, a connecting pipe 24 that penetrates the upper valve stem seat 2 and abuts against the outer side wall of the valve stem 4 is provided at the output of the air charging and suction pump 23, a first channel 25 corresponding to the connecting pipe 24 is provided on the outer side wall of the valve stem 4, the first channel 25 extends toward the valve stem 4 at the end away from the connecting pipe 24, and a second channel 26 that penetrates the valve plate 5 and communicates with the high-temperature resistant and corrosion-proof air cushion 22 is provided at the end of the first channel 25 away from the connecting pipe 24.

[0108] Through the settings of the connecting pipe 24, the first channel 25 and the second channel 26, the gas of the air charging and suction pump 23 can be in an inflated state and an adsorbed state with respect to the high-temperature resistant and corrosion-proof air cushion 22, so as to achieve the filling and sealing of the sealing groove 21 and closing.

[0109] Embodiment 8:

[0110] In this embodiment, in addition to including the structural features of the foregoing embodiment, further, small self-priming spray pumps 27 are provided on both sides of the outer side wall of the valve body 1, the side wall of the sealing groove 21 is communicated with the sliding groove 16, water outlet pipes 28 are provided at the output ends of the two small self-priming spray pumps 27, the two water outlet pipes 28 penetrate the valve seat and communicate with the side wall of the sealing groove 21 facing the sliding groove 16, and water suction pipes 29 communicated with the inside of the sealing groove 21 are provided at the input ends of the small self-priming spray pumps 27;

[0111] Through the setting of the water outlet pipe 28, the small self-priming spray pump 27 can clean the sliding groove 16 to prevent dirt and impurities from jamming the sliding block. When the sliding half-ring 15 abuts against the valve plate 5, the small self-priming spray pump 27 continues to spray water to clean the sealing groove 21. And through the setting of the water suction pipe 29, the dirt in the sealing groove 21 can be removed to prevent the high-temperature resistant and corrosion-resistant air cushion from being worn and the sealing from being insufficient.

[0112] Embodiment 9:

[0113] In this embodiment, in addition to 6 including the structural features of the foregoing embodiment, further, the following steps are included:

[0114] S1: First, turn on the air charging and suction pump 23 to suck air, suck out the air in the high-temperature resistant and corrosion-proof air cushion 22, and make the high-temperature resistant and corrosion-proof air cushion 22 sink into the placement groove 20;

[0115] S2: Turn on the valve stem electric actuator 6 to rotate the valve stem 4. The valve stem 4 drives the sliding half-rings 15 on both sides to move, and at the same time start the adsorption structure to adsorb the sliding half-rings 15. At this time, the valve is in an open state;

[0116] S3: When closing the valve, control the small self-priming spray pump 27 to spray water to clean the chute 16, and then control the adsorption structure to close. The slider rebounds under the action of the elastic member 17, so that the sliding half-ring 15 abuts against the valve plate 5;

[0117] S4: Continuously spray water from the small self-priming spray pump 27, and at the same time start the water absorption effect of the small self-priming spray pump 27, so as to achieve the cleaning effect and clean the sealing groove 21;

[0118] S5: Open the air outlet of the air charging and suction pump 23 to inflate the high-temperature resistant and corrosion-proof air cushion 22, and start to fill it into the sealing groove 21 to complete the valve closing;

[0119] Through the setting of S1, the valve plate 5 can be opened without causing sealing wear. Through the setting of S2, the valve can be automatically opened, and at the same time, the first sealing and pressure sharing of the sliding half-ring 15 can be obtained and it can still be opened. Through the setting of S3, the slider can be prevented from being stuck, and the sealing performance of the valve plate 5 can be increased and the pressure can be shared. Through the setting of S4, the wear of the high-temperature resistant and corrosion-proof air cushion 22 during inflation can be prevented, and the sealing effect of the high-temperature resistant and corrosion-proof air cushion 22 during inflation can also be prevented from decreasing.

[0120] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-lock high-temperature butterfly valve, comprising a valve seat, characterized in that, Comprising: A valve stem (4) seat, including an upper valve stem seat (2) and a lower valve stem seat (3), which are respectively arranged on both sides of the valve body (1); A valve stem (4), one end of which is arranged above the upper valve seat, and the other end penetrates through the upper valve stem seat (2), the valve seat and the lower valve stem seat (3) respectively; A valve plate (5), sleeved on the valve stem (4) and located inside the valve seat; And two anti-lock structures, which are respectively arranged between the upper valve seat and the valve stem (4) and between the lower valve seat and the valve stem (4); Wherein, an electric actuator (6) for driving the valve stem is provided at the top end of the valve stem (4), and the anti-lock structure is used to prevent the valve stem (4) from jamming; It further includes: two pressure balance rings, which are respectively attached to both sides of the valve plate (5). Both pressure balance rings are arranged on the inner wall of the valve seat, and the pressure balance ring includes a fixed half-ring (14) fixedly connected to the inner wall of the valve seat and a sliding half-ring (15) moving away from the valve plate (5); A sliding connection structure, one end of which is connected to the sliding half-ring (15), and the other end is slidably connected to the inner wall of the valve seat; And two adsorption structures, which are respectively arranged on the side of the two sliding half-rings (15) away from the valve plate (5), and the adsorption structures are arranged on the inner wall of the valve body (1); Wherein, the fixed half-ring (14) and the sliding half-ring (15) form a complete ring, and the positions of the fixed half-rings (14) and the sliding half-rings (15) of the two pressure balance rings are set in opposite directions. When the valve plate (5) rotates, the two sliding half-rings (15) move towards the adsorption structure through the sliding connection structure, so that the adsorption structure adsorbs the sliding half-ring (15). When the valve plate (5) rotates back to the original position, the adsorption structure releases the sliding half-ring (15), the sliding connection structure makes the sliding half-ring (15) move back to the initial position, and the sliding half-ring (15) is made of a magnetically attractable material.

2. The anti-lock high-temperature butterfly valve according to claim 1, characterized in that, The anti-lock structure includes: A number of graphite packings (7), which are evenly and spacedly sleeved on the outer side wall of the valve stem (4), and the outer side wall of the graphite packing (7) abuts against the inner wall of the valve stem (4) seat; A number of self-tightening springs (8), which are respectively arranged between two adjacent graphite packings (7); And two gland covers (9), which are respectively pressed on the upper valve stem seat (2) and the lower valve stem seat (3); Wherein, one of the number of spacedly sleeved graphite packings (7) closest to the valve body (1) abuts against the inner bottom of the valve stem (4) seat, and the gland cover (9) is pressed on the graphite packing (7).

3. The anti-lock high-temperature butterfly valve according to claim 2, characterized in that, It further includes: A lower bracket (10), sleeved on the outer side wall of the end of the valve stem (4) away from the actuator; An end cover (11), arranged at the bottom end of the valve stem (4); a bearing (12), sleeved on the outer side wall of the valve stem (4), and the outer side wall of the bearing (12) is embedded in the inner wall of the lower bracket (10); And a union nut (13), sleeved on the outer side wall of the bottom end of the valve stem (4), and the bottom end of the union nut (13) abuts against the end cover (11); Wherein, the lower bracket (10) and the end cover (11) are connected by bolts.

4. The anti-lock high-temperature butterfly valve according to claim 3, characterized in that, The sliding connection structure includes: A sliding block, one end of which is connected to the side of the sliding half-ring (15) facing the valve seat, and the other end slides inside the valve seat; A slide groove (16) for sliding the sliding block is provided on the inner wall of the valve seat, and the slide groove (16) extends toward one side of the adsorption structure, a fixed block is provided in the slide groove (16), and the fixed block is located on a side wall of the slide groove (16) facing away from the sliding block, an elastic member (17) is provided between the fixed block and the sliding block, and the elastic member (17) is located in the slide groove (16).

5. The anti-lock high-temperature butterfly valve according to claim 4, characterized in that, The adsorption structure comprises: Two half-ring fixing blocks (18) are respectively arranged on a side of the sliding half-ring (15) facing away from the valve plate (5); and a plurality of electromagnet parts (19), the driving end of which is arranged on the outer wall of the valve seat, and the output end of which penetrates the valve seat and is arranged in the semi-ring fixing block (18); Wherein, a plurality of the electromagnet members (19) are arranged at intervals in the semi-ring fixing block (18), and the attraction end of the electromagnet member (19) is connected to the semi-ring fixing block (18) and faces one side of the sliding semi-ring (15).

6. The anti-lock high-temperature butterfly valve according to claim 5, characterized in that, The outer wall of the valve plate (5) is provided with a placement groove (20), the inner wall of the valve body (1) is provided with a sealing groove (21) corresponding to the placement groove (20), a high temperature resistant and corrosion resistant air cushion (22) is provided in the placement groove (20), an air charging and suction pump (23) is provided on the outer wall of the valve body (1), a connecting pipe (24) penetrating the upper valve stem seat (2) and abutting against the outer wall of the valve stem (4) is provided on the output of the air charging and suction pump (23), a first channel (25) corresponding to the connecting pipe (24) is provided on the outer wall of the valve stem (4), one end of the first channel (25) facing away from the connecting pipe (24) extends toward the valve stem (4), and one end of the first channel (25) facing away from the connecting pipe (24) is provided with a second channel (26) penetrating the valve plate (5) and connected to the high temperature resistant and corrosion resistant air cushion (22).

7. The anti-lock high-temperature butterfly valve according to claim 6, characterized in that, Small self-priming water spray pumps (27) are provided on both sides of the outer wall of the valve body (1); the side wall of the sealing groove (21) is connected to the slide groove (16); the output ends of the two small self-priming water spray pumps (27) are provided with water outlet pipes (28); the two water outlet pipes (28) pass through the valve seat and are connected to the side wall of the sealing groove (21) facing the slide groove (16); the input ends of the small self-priming water spray pumps (27) are provided with water suction pipes (29) connected to the sealing groove (21).

8. An operating method of the anti-lock high-temperature butterfly valve as claimed in claim 7, characterized in that, The steps include: S1: First, the air filling and suction pump (23) is turned on to suck air out of the high temperature resistant anticorrosion air cushion (22), so that the high temperature resistant anticorrosion air cushion (22) is immersed in the placement groove (20); S2: (6) is opened to rotate the valve stem (4), which drives the sliding half rings (15) on both sides to move, and at the same time, the adsorption structure is activated to adsorb the sliding half rings (15). At this time, the valve is in the open state; S3: When closing the valve, the small self-priming water pump (27) is controlled to spray water to clean the slide groove (16), and then the adsorption structure is controlled to close, and the sliding block is rebounded by the elastic member (17), so that the sliding half ring (15) contacts the valve plate (5); S4: continuing to spray water from the small self-priming water spray pump (27), while starting the water absorption effect of the small self-priming water spray pump (27), thereby achieving a cleaning effect; S5: Turn on the air outlet of the charging and suction pump (23), inflate the high-temperature and corrosion-resistant air cushion (22), start to fill it into the sealing groove (21), and complete the valve closing.

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