CN119755351A - A self-sealing stop valve for power station - Google Patents
A self-sealing stop valve for power station Download PDFInfo
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- CN119755351A CN119755351A CN202510272418.6A CN202510272418A CN119755351A CN 119755351 A CN119755351 A CN 119755351A CN 202510272418 A CN202510272418 A CN 202510272418A CN 119755351 A CN119755351 A CN 119755351A
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Abstract
The invention relates to a self-sealing stop valve for a power station, which relates to the technical field of valves and comprises a valve body, a valve cover, a driving end, a valve rod and a sealing assembly, wherein the valve cover is arranged on the valve body, the driving end is arranged on the valve cover, the valve rod is arranged on the driving end, a water inlet and a water outlet are formed in the valve body, the sealing assembly comprises a valve core, a gland, a pin, a spring, a sealing element and a valve seat, the valve seat is arranged on the valve body, a limiting part is arranged at one end of the valve rod far away from the driving end, the gland is movably arranged on the limiting part, the valve core is arranged on the gland, a pin hole is arranged at the position corresponding to the valve core and the gland, the pin is arranged on the valve core through the pin hole, one end of the spring is abutted against the valve core, and the other end of the spring is abutted against the valve rod, and the sealing element is arranged on the valve core for sealing the valve seat.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a self-sealing stop valve for a power station.
Background
With the development of the power industry, especially in the fields of thermal power, nuclear power and the like, the operation parameters of a power station are continuously improved, such as high temperature, high pressure, high flow and the like, the stable operation of a power station system is crucial, and the leakage or the failure of any valve can cause the shutdown of the whole system and even safety accidents. Under such conditions, sealing performance and reliability of conventional shut-off valves pose serious challenges. The self-sealing stop valve can realize better sealing under high pressure, meets the requirement of high-parameter operation of a power station, has higher sealing reliability and stability, can effectively reduce leakage risk, and ensures stable operation of a power station system.
At present, the Chinese patent application with publication number of CN 119412511A proposes a stop valve, which solves the technical problems of low upper limit of temperature and pressure and easy abrasion and leakage in the prior art, and the publication date is 2025, 02 and 11. The application discloses a stop valve which comprises a valve body, a valve seat, a valve cover and a valve rod. The valve body is including the first passageway and the second passageway of intercommunication each other, and the disk seat is located the junction of first passageway and second passageway, and disk seat and valve gap all can dismantle the cooperation with the valve body, valve rod and valve gap sliding fit to make the valve rod be close to or keep away from the disk seat, when the valve rod is close to the disk seat, the valve rod can be blocked first passageway and second passageway. The components of the stop valve disclosed by the application are detachably matched, so that the valve seat can be taken out for hard alloy surfacing, the service temperature and pressure of the stop valve are greatly improved, and the service life of the stop valve can be effectively prolonged.
However, only one way to seal the shut-off valve is to provide a seal that is very challenging in terms of performance and reliability, and a single seal may not provide stable sealing under extreme conditions, such as high differential pressure and high flow rates.
It is therefore necessary to provide a self-sealing shut-off valve for a power station to solve the above-mentioned problems.
Disclosure of Invention
In order to better enable the stop valve to realize better sealing under high pressure, meet the requirement of high-parameter operation of a power station, enable the stop valve to have higher sealing reliability and stability, the invention provides the self-sealing stop valve for the power station.
The invention provides a self-sealing stop valve for a power station, which comprises a valve body, a valve cover, a driving end, a valve rod and a sealing assembly, wherein the valve cover is arranged on the valve body, the driving end is arranged on the valve cover, the valve rod is arranged on the driving end, a water inlet and a water outlet are formed in the valve body, the sealing assembly comprises a valve core, a gland, a pin, a spring, a sealing element and a valve seat, the valve seat is arranged on the valve body, a limiting part is arranged at one end, far away from the driving end, of the valve rod, the gland is movably arranged on the limiting part, the valve core is arranged on the gland, a pin hole is arranged at the position, corresponding to the gland, of the valve core, the pin is arranged on the valve core through the pin hole, one end of the spring is abutted to the valve core, the other end of the spring is abutted to the valve rod, and the sealing element is arranged on the valve core and is used for sealing the valve seat.
The technical scheme of the embodiment of the application has the technical effects that in the process of using the self-sealing stop valve, the driving end is driven by the hand wheel to drive the valve rod to move downwards, so that the valve core is driven to contact with the valve seat, the sealing element on the valve core is abutted against the valve seat, the valve rod is sealed in the first stage, then the valve rod continues to move downwards, the spring is compressed, the continuous pressure generated by the valve rod on the valve core is uniformly dispersed through the spring, the gap between the sealing element and the valve seat is continuously compressed, and the self sealing in the second stage is realized.
In some embodiments, the seal includes a hard seal ring disposed on the valve seat, a first soft seal ring disposed on the valve spool, and a second soft seal ring disposed on the hard seal ring.
In some embodiments, a sealing convex part is arranged on the first soft sealing ring, and a sealing groove is formed in a position corresponding to the sealing convex part on the first soft sealing ring.
In some embodiments, the pin bores include a first pin bore having a smaller distance from the end face of the spool remote from the end of the spring than the second pin bore, a second pin bore having a smaller distance from the end face of the spool remote from the end of the spring than the third pin bore.
In some embodiments, a guide sleeve is arranged on the valve seat, and a plurality of connecting through holes are formed in the guide sleeve.
In some embodiments, a connecting piece is arranged on the valve cover, one end, far away from the valve cover, of the connecting piece is arranged in the valve body, and a first sealing ring and a second sealing ring are arranged on the connecting piece and are used for sealing a gap between the connecting piece and the valve cover.
In some embodiments, the round hole has been seted up on the connecting piece, the valve rod passes the round hole and reciprocates through the driving end, be provided with bellows seal assembly on the valve rod, bellows seal assembly includes bellows, butt disk, first ring seal and second ring seal, the butt disk sets up on the valve rod, the bellows sleeve is established on the valve rod, the one end butt of bellows is on the connecting piece, the other end butt of bellows is on the butt disk, first ring seal sets up on the one end that the butt disk is close to the bellows, the second ring seal sets up on the one end that the valve gap was kept away from to the connecting piece, first ring seal with second ring seal size is the same.
In some embodiments, the valve body and the valve cover are connected by a connecting collar, the connecting collar comprises a first connecting collar and a second connecting collar, the first connecting collar and the second connecting collar are both disposed on the valve body, and the first connecting collar and the second connecting collar are connected by a nut.
In some embodiments, a hand wheel is provided on the drive end, and a handle is provided on the hand wheel.
In some embodiments, the valve cover is provided with a connecting hole.
Drawings
FIG. 1 is a schematic perspective view of a self-sealing stop valve for a power station according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a self-sealing stop valve for a power station according to an embodiment of the present application;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is an enlarged view of portion C of FIG. 2;
FIG. 6 is an enlarged view of portion D of FIG. 2;
fig. 7 is a schematic perspective view of a guide sleeve according to an embodiment of the present application.
Wherein, each reference sign in the figure:
1. Valve body, 11, valve cover, 12, driving end, 13, water inlet, 14, water outlet, 15, hand wheel, 16, handle, 17, valve rod, 18, limit part, 19, connecting hole, 2, sealing component, 21, valve core, 22, gland, 23, pin, 24, pin hole, 241, first pin hole, 242, second pin hole, 243, third pin hole, 25, spring, 26, sealing element, 261, hard sealing ring, 262, first soft sealing ring, 263, second soft sealing ring, 264, sealing convex element, 265, sealing groove, 27, valve seat, 3, guiding sleeve, 31, connecting through hole, 4, bellows sealing component, 41, bellows, 42, abutting disc, 43, first annular sealing gasket, 44, second annular sealing gasket, 45, connecting element, 5, connecting hoop, 51, first connecting hoop, 52, second connecting hoop, 53, nut, 6, first sealing ring, 61, second sealing ring.
Detailed Description
Based on the above, in order to better enable the stop valve to realize better sealing under high pressure, meet the requirement of high-parameter operation of a power station, enable the stop valve to have higher sealing reliability and stability, the embodiment of the application provides the following scheme.
Referring to fig. 1 to 7, the embodiment of the application provides a self-sealing stop valve for a power station, which comprises a valve body 1, a valve cover 11, a driving end 12, a valve rod 17 and a sealing assembly 2, wherein the valve cover 11 is arranged on the valve body 1, the driving end 12 is arranged on the valve cover 11, the valve rod 17 is arranged on the driving end 12, a water inlet 13 and a water outlet 14 are formed in the valve body 1, and the sealing assembly 2 is arranged on the valve rod 17.
In some embodiments, please refer to fig. 1 to 2 together, the valve body 1 and the valve cover 11 are connected through the connection hoop 5, the connection hoop 5 includes a first connection hoop 51 and a second connection hoop 52, the first connection hoop 51 and the second connection hoop 52 are all disposed on the valve body 1, the first connection hoop 51 and the second connection hoop 52 are connected through a nut 53, the driving end 12 is provided with a hand wheel 15, the hand wheel 15 is provided with a handle 16, the valve cover 11 is provided with a connection hole 19, so as to facilitate the maintenance of the stop valve by a maintainer while facilitating the heat dissipation of the stop valve.
So set up, in the in-process that needs to maintain the stop valve, can pull down first connection hoop 51 and second connection hoop 52 through loosening nut 53, separate valve body 1 and valve gap 11, make the valve body 1 more nimble with the connection of valve gap 11, be convenient for install fast and dismantle, when needing maintenance or change part, can dismantle the valve fast, save time and manpower, the design of connecting hoop 5 can provide good sealing performance simultaneously, through the fastening effect of nut 53, ensure the leakproofness between valve body 1 and the valve gap 11, effectively prevent the medium leakage, this kind of connected mode has certain adaptability to pipeline system's vibration and thermal expansion, can reduce the connection that causes because of temperature variation or vibration is not hard up, the operation of hand wheel 15 and handle 16 makes the valve more directly perceived and convenient, the maintainer can be through the easy control opening and the closing of valve of manual rotatory hand wheel 15, the operating means of hand wheel 15 and handle 16 has avoided using external tool, the maloperation or damage that probably brings, the security of operation has been improved, connecting hole 19 on the valve gap 11 helps the air, can effectively reduce the valve and produce the valve in the service life in the course of working channel and the high-time and the service life is convenient for the maintenance personnel, the maintenance is convenient for the maintenance of the maintenance, the maintenance cost is reduced, the maintenance cost is provided for the valve is convenient for the maintenance hole.
In some embodiments, referring to fig. 2 to 4 together, the seal assembly 2 includes a valve core 21, a gland 22, a pin 23, a spring 25, a seal 26 and a valve seat 27, the valve seat 27 is disposed on the valve body 1, a limit portion 18 is disposed on an end of the valve rod 17 away from the driving end 12, the gland 22 is movably disposed on the limit portion 18, the valve core 21 is disposed on the gland 22, a pin hole 24 is disposed at a position corresponding to the gland 22 on the valve core 21, the pin 23 is disposed on the valve core 21 through the pin hole 24, one end of the spring 25 abuts against the valve core 21, the other end of the spring 25 abuts against the valve rod 17, the seal 26 includes a hard seal 261, a first soft seal 262 and a second soft seal 263, the hard seal 261 is disposed on the valve seat 27, the first soft seal 262 is disposed on the hard seal 261, a seal protrusion 264 is disposed on the first soft seal 262, and a seal groove 265 is formed at a position corresponding to the seal protrusion 264 on the first soft seal 262.
So set up, in the in-process of using self sealss stop valve, drive end 12 through hand wheel 15 drives valve rod 17 and moves downwards, thereby drive case 21 and disk seat 27 contact, make the first soft sealing washer 262 on the case 21 butt on the second soft sealing washer 263 of disk seat 27, simultaneously second soft sealing washer 263 sets up on hard sealing washer 261, thereby carry out the sealed of first stage, then valve rod 17 continues to move downwards, compression spring 25, the continuous pressure that valve rod 17 produced to the case 21 through the even dispersion of spring 25, and continuously compress tightly between first soft sealing washer 262 and the second soft sealing washer 263, make the seal protruding piece 264 on the first soft sealing washer 262 mesh with the seal recess 265 on the second soft sealing washer 263, simultaneously the bottom butt of first soft sealing washer 262 is on hard sealing washer 261, realize the self sealss of second stage. Thus, the combination of the soft sealing ring and the hard sealing ring 261 and the auxiliary compression of the spring 25 realize the sealing of the first stage and the second stage, the double sealing mechanism can effectively prevent medium leakage, good sealing performance can be kept even under the working condition of high pressure or high flow rate, the meshing design of the first soft sealing ring 262 and the second soft sealing ring 263 and the contact of the soft sealing ring and the hard sealing ring 261 further enhance the sealing reliability, reduce the leakage risk caused by abrasion or aging of the sealing piece 26, the valve core 21 can automatically adjust the sealing pressure when the pressure changes due to the action of the spring 25, the sealing effect is ensured not to be influenced by the fluctuation of the medium pressure, the self-adaption can ensure that the valve can keep stable sealing performance under different working conditions, the combined design of the soft sealing ring and the hard sealing ring 261 can adapt to a wider temperature range, the self-sealing stop valve is suitable for various media and working conditions, including high-temperature, low-temperature or corrosive media, the spring 25 can uniformly disperse the pressure of the valve rod 17 on the valve core 21, excessive abrasion or damage of the sealing element 26 caused by excessive local pressure is avoided, the service life of the sealing element 26 is prolonged, direct friction between the valve core 21 and the valve seat 27 is reduced, the abrasion speed is reduced, the whole service life of the valve is further prolonged, even if the sealing element 26 needs to be replaced, maintenance personnel can quickly position the problem and replace damaged parts due to the modularized design of a sealing mechanism, the maintenance time and cost are reduced, the design of the self-sealing stop valve realizes high sealing reliability, strong adaptability and long service life through the elastic compensation of the multi-stage sealing mechanism and the spring 25, and the operation and maintenance processes are simplified, and the method is suitable for various complex industrial working conditions.
In some embodiments, referring to fig. 3 and fig. 7 together, the pin hole 24 includes a first pin hole 241, a second pin hole 242 and a third pin hole 243, the distance between the first pin hole 241 and the end surface of the valve core 21 far from the end of the spring 25 is smaller than that between the second pin hole 242, the distance between the second pin hole 242 and the end surface of the valve core 21 far from the end of the spring 25 is smaller than that between the second pin hole 242 and the third pin hole 243, the guide sleeve 3 is disposed on the valve seat 27, and a plurality of connecting through holes 31 are formed on the guide sleeve 3.
By arranging the three pin holes 24 with different heights on the valve core 21, in order to control the elasticity of the spring 25 through the pin holes 24 with different positions, the limitation on the spring 25 is relatively smaller when the first pin hole 241 is used, the elasticity of the spring 25 is larger, the limitation on the spring 25 is always kept when the second pin hole 242 is used, the limitation on the spring 25 is larger when the third pin hole 243 is used, the elasticity of the spring 25 can be smaller, the hardness of the first soft sealing ring 262 and the second soft sealing ring 263 is changed along with the increment of the using degree, the elasticity of the spring 25 is conveniently controlled to be applied through the pin holes 24 with different positions, the sealing convex pieces 264 and the sealing grooves 265 on the first soft sealing ring 262 and the second soft sealing ring 263 are meshed better, a plurality of through holes are formed in the periphery of the guide sleeve 3, medium circulation is conveniently supplied, and the guide effect is generated on the up-and-down movement of the valve core 21, so that the stabilizing effect is realized. Thus, by selecting the pin holes 24 with different heights, the elastic force of the spring 25 can be flexibly adjusted, the first pin hole 241 is less limited, the elastic force is larger, and the device is suitable for the initial working condition requiring larger sealing pressure; the second pin hole 242 has a moderate elastic force, is suitable for normal working state; the third pin hole 243 has larger limit and smaller elasticity, is suitable for the low elasticity requirement of the soft sealing ring after abrasion, and the soft and hard degree of the soft sealing ring can be changed along with the increment of the using degree, and by adjusting the position of the pin hole 24, the spring force of the spring 25 can be optimized, ensuring that the sealing convex piece 264 and the sealing concave groove 265 of the sealing ring always maintain a good engagement state, thereby prolonging the service life of the sealing ring, and by combining the soft sealing ring with the hard sealing ring 261, and the elastic compensation of the springs 25, a double seal is achieved, which design is effective against medium leakage, the stable sealing performance can be maintained even under the working condition of high pressure or high flow rate, the elastic compensation function of the spring 25 can automatically adjust the sealing pressure according to the medium pressure and the sealing ring state, the stability and the reliability of the sealing performance are ensured, the through hole design at the periphery of the guide sleeve 3 is convenient for medium circulation, the stable guide function can be provided when the valve core 21 and the valve rod 17 move up and down, the design reduces the shaking of the valve core 21 and the valve rod 17, improves the dynamic stability of the valve, reduces unnecessary friction between the valve core 21 and the valve seat 27 due to stable guiding action, reduces the abrasion speed, further prolongs the service life of the valve, and adjusts the position of the valve through a simple pin hole 24, the spring force of the spring 25 can be optimized without complex tools or equipment, and the design makes the maintenance of the valve simpler and more convenient, and reduces the downtime and maintenance cost.
In some embodiments, referring to fig. 5 to 7 together, a connecting piece 45 is disposed on a valve cover 11, one end of the connecting piece 45 away from the valve cover 11 is disposed in a valve body 1, a first sealing ring 6 and a second sealing ring 61 are disposed on the connecting piece 45, the connecting piece 45 is provided with a round hole, a valve rod 17 passes through the round hole and moves up and down through a driving end 12, a bellows seal assembly 4 is disposed on the valve rod 17, the bellows seal assembly 4 comprises a bellows 41, an abutting disc 42, a first annular seal 43 and a second annular seal 44, the abutting disc 42 is disposed on the valve rod 17, the bellows 41 is sleeved on the valve rod 17, one end of the bellows 41 abuts on the connecting piece 45, the other end of the bellows 41 abuts on the abutting disc, the first annular seal 43 is disposed on one end of the abutting disc close to the bellows 41, the second annular seal 44 is disposed on one end of the connecting piece 45 away from the valve cover 11, and the first annular seal 43 is the same as the second annular seal 44.
By arranging the bellows 41 on the connecting member 45 to seal the gap between the connecting member 45 and the valve stem 17, the bellows 41 acts as the spring 25, the valve stem 17 can be damped to a certain extent, the abutting disc 42 is used for abutting the bellows 41, meanwhile, the abutting disc 42 and the connecting member 45 are provided with the first annular sealing gasket 43 and the second annular sealing gasket 44, collision friction generated when the abutting disc 42 contacts the connecting member 45 in the process of moving up and down along with the valve stem 17 is reduced, unnecessary abrasion is caused, and at the same time, when the stop valve is opened, when a large flow medium passes through the stop valve, the first annular sealing gasket 43 and the second annular sealing gasket 44 can be used for further sealing the gap between the connecting member 45 and the valve stem 17, and at the same time, the gap between the connecting member 45 and the valve cover 11 is sealed through the first sealing ring 6 and the second sealing ring 61. So, bellows 41 is not only be used for sealing the clearance between connecting piece 45 and the valve rod 17, still have the effect of spring 25 concurrently, can provide elastic compensation, reduce the leakage risk because of valve rod 17 motion brings, first ring seal pad 43 and second ring seal pad 44 reduce collision and friction between butt disk 42 and connecting piece 45 when valve rod 17 reciprocates, further seal the clearance when the large-traffic medium passes through simultaneously, ensure sealing performance, first sealing washer 6 and second sealing washer 61 are used for sealing the clearance between connecting piece 45 and the valve gap 11, further strengthened whole sealing effect, the elasticity of bellows 41 can play the cushioning effect to the motion of valve rod 17, reduce the mechanical abrasion because of medium impact or valve rod 17 fast movement, butt disk 42 is used for butt bellows 41, cooperate the ring seal pad to reduce the wearing and tearing of contact surface simultaneously, the life of extension sealing member 26, this kind of design is applicable to high pressure, the operating condition of large-traffic and corrosivity medium, bellows 41 seal can effectively prevent to leak, simultaneously reduce the medium and to the clearance between valve rod 17 and the sealing member 26, the clearance between sealing performance is improved to the valve rod 17, the elastic compensation function of bellows 41 has been used for sealing performance is improved, the motion of valve rod 17 has been compared with the high-pressure medium, the operating requirement is more smoothly is avoided because of the medium is guaranteed, the cost is more easily leaked, the sealing performance is improved, the cost is more than the sealing performance is improved to the sealing performance is more than the sealing performance has been improved, and has been in the sealing performance has been in accordance with the performance has been in the sealing the performance has been more improved.
The implementation principle of the self-sealing stop valve for the power station provided by the embodiment of the application is as follows:
In the process of needing to repair the stop valve, the nut 53 can be loosened, the first connecting hoop 51 and the second connecting hoop 52 can be detached, the valve body 1 and the valve cover 11 are separated, the connection between the valve body 1 and the valve cover 11 is more flexible, the valve can be conveniently and quickly installed and detached, when the valve is needed to be repaired or replaced, time and labor are saved, a maintainer can easily control the opening and closing of the valve by manually rotating the hand wheel 15, the hand wheel 15 and the handle 16 are operated in a manner that an external tool is avoided, the connecting hole 19 on the valve cover 11 is beneficial to air circulation, the heat generated by friction or a high-temperature medium in the working process of the valve can be effectively reduced, the service life of the valve is prolonged, meanwhile, the design of the connecting hole 19 provides a more convenient maintenance channel for the maintainer, the parts inside the valve are convenient to inspect and clean, and the maintenance time and cost are reduced.
In the process of using the self-sealing stop valve, the driving end 12 is driven by the hand wheel 15 to drive the valve rod 17 to move downwards, so that the valve core 21 is driven to contact with the valve seat 27, the first soft sealing ring 262 on the valve core 21 is abutted against the second soft sealing ring 263 on the valve seat 27, meanwhile, the second soft sealing ring 263 is arranged on the hard sealing ring 261, so that the sealing of the first stage is carried out, then the valve rod 17 continues to move downwards, the spring 25 is compressed, the continuous pressure generated by the valve rod 17 on the valve core 21 is evenly dispersed through the spring 25, and the sealing convex piece 264 on the first soft sealing ring 262 is meshed with the sealing groove 265 on the second soft sealing ring 263, and meanwhile, the bottom of the first soft sealing ring 262 is abutted against the hard sealing ring 261, so that the self sealing of the second stage is realized. By providing three pin holes 24 with different heights on the valve core 21, in order to control the elasticity of the spring 25 through the pin holes 24 with different positions, the limitation of the spring 25 is relatively smaller when the first pin hole 241 is used, the elasticity of the spring 25 is larger, the limitation of the spring 25 is always when the second pin hole 242 is used, the elasticity of the spring 25 is moderate, the limitation of the spring 25 is larger when the third pin hole 243 is used, the elasticity of the spring 25 can be applied to be smaller, the hardness of the first soft sealing ring 262 and the second soft sealing ring 263 is changed along with the increment of the using degree, and the elasticity of the spring 25 is conveniently controlled to be applied through the pin holes 24 with different positions, so that the sealing convex pieces 264 and the sealing grooves 265 on the first soft sealing ring 262 and the second soft sealing ring 263 are meshed better, a plurality of through holes are formed in the periphery of the guide sleeve 3, medium can be conveniently supplied to circulate, and meanwhile, the guiding effect is generated on the up and down movement of the valve rod 17 of the valve core 21, so that the stabilizing effect is realized. By arranging the bellows 41 on the connecting piece 45 for sealing the gap between the connecting piece 45 and the valve rod 17, the bellows 41 corresponds to the action of the spring 25, the valve rod 17 can be damped to a certain extent, the abutting disc 42 is used for abutting the bellows 41, meanwhile, the abutting disc 42 and the connecting piece 45 are provided with the first annular sealing gasket 43 and the second annular sealing gasket 44 for reducing collision friction generated when the abutting disc 42 contacts the connecting piece 45 in the process of moving up and down along with the valve rod 17, unnecessary abrasion is caused, and at the same time, when the stop valve is opened, when a large flow medium passes through the stop valve, the first annular sealing gasket 43 and the second annular sealing gasket 44 can be used for further sealing the gap between the connecting piece 45 and the valve rod 17, and meanwhile, the gap between the connecting piece 45 and the valve cover 11 is sealed through the first sealing ring 6 and the second sealing ring 61.
The above embodiments are not intended to limit the scope of the invention, so that the equivalent changes of the structure, shape and principle of the invention are covered by the scope of the invention.
Claims (10)
1. The utility model provides a self-sealing stop valve for a power station, which is characterized by comprising a valve body (1), a valve cover (11), a driving end (12), a valve rod (17) and a sealing assembly (2), wherein the valve cover (11) is arranged on the valve body (1), the driving end (12) is arranged on the valve cover (11), the valve rod (17) is arranged on the driving end (12), a water inlet (13) and a water outlet (14) are arranged on the valve body (1), the sealing assembly (2) comprises a valve core (21), a gland (22), a pin (23), a spring (25), a sealing piece (26) and a valve seat (27), the valve seat (27) is arranged on the valve body (1), a limit part (18) is arranged at one end, far away from the driving end (12), of the valve rod (17), the gland (22) is movably arranged on the limit part (18), the valve core (21) is arranged on the gland (22), a pin hole (24) is arranged at a position corresponding to the gland (22), the valve core (21), the pin (23) is arranged on the position corresponding to the gland (22), and is in contact with the other end (25) of the valve core (21) through the pin hole (24), the seal (26) is arranged on the valve core (21) and is used for sealing the valve seat (27).
2. The self-sealing stop valve for a power station according to claim 1, wherein the sealing member (26) comprises a hard sealing ring (261), a first soft sealing ring (262) and a second soft sealing ring (263), the hard sealing ring (261) is arranged on a valve seat (27), the first soft sealing ring (262) is arranged on a valve core (21), and the second soft sealing ring (263) is arranged on the hard sealing ring (261).
3. The self-sealing stop valve for the power station as claimed in claim 2, wherein the first soft sealing ring (262) is provided with a sealing convex part (264), and a sealing groove (265) is formed at a position corresponding to the sealing convex part (264) on the second soft sealing ring (263) and the first soft sealing ring (262).
4. A self-sealing stop valve for a power station as claimed in claim 3, wherein the pin hole (24) comprises a first pin hole (241), a second pin hole (242) and a third pin hole (243), the distance between the first pin hole (241) and the end face of the valve core (21) far away from the end of the spring (25) is smaller than that between the second pin hole (242), and the distance between the second pin hole (242) and the end face of the valve core (21) far away from the end of the spring (25) is smaller than that between the third pin hole (243).
5. The self-sealing stop valve for power stations as claimed in claim 4, wherein the valve seat (27) is provided with a guide sleeve (3), and a plurality of connecting through holes (31) are formed in the guide sleeve (3).
6. The self-sealing stop valve for the power station as claimed in claim 5, wherein the valve cover (11) is provided with a connecting piece (45), one end of the connecting piece (45) far away from the valve cover (11) is arranged in the valve body (1), and the connecting piece (45) is provided with a first sealing ring (6) and a second sealing ring (61) for sealing a gap between the connecting piece (45) and the valve cover (11).
7. The self-sealing stop valve for a power station according to claim 6, wherein the connecting piece (45) is provided with a round hole, the valve rod (17) passes through the round hole and moves up and down through the driving end (12), the valve rod (17) is provided with a corrugated pipe sealing assembly (4), the corrugated pipe sealing assembly (4) comprises a corrugated pipe (41), a butt disc (42), a first circular ring sealing pad (43) and a second circular ring sealing pad (44), the butt disc (42) is arranged on the valve rod (17), the corrugated pipe (41) is sleeved on the valve rod (17), one end of the corrugated pipe (41) is abutted on the connecting piece (45), the other end of the corrugated pipe (41) is abutted on the butt disc, the first circular ring sealing pad (43) is arranged on one end, close to the corrugated pipe (41), of the connecting piece (45) is far away from the valve cover (11), and the first circular ring sealing pad (43) is the same as the second circular ring sealing pad (44).
8. The self-sealing stop valve for a power station according to claim 7, wherein the valve body (1) is connected with the valve cover (11) through a connecting hoop (5), the connecting hoop (5) comprises a first connecting hoop (51) and a second connecting hoop (52), the first connecting hoop (51) and the second connecting hoop (52) are arranged on the valve body (1), and the first connecting hoop (51) and the second connecting hoop (52) are connected through a nut (53).
9. The self-sealing stop valve for the power station as claimed in claim 8, wherein the driving end (12) is provided with a hand wheel (15), and the hand wheel (15) is provided with a handle (16).
10. The self-sealing stop valve for power stations according to claim 9, characterized in that the valve cover (11) is provided with a connecting hole (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510272418.6A CN119755351A (en) | 2025-03-10 | 2025-03-10 | A self-sealing stop valve for power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510272418.6A CN119755351A (en) | 2025-03-10 | 2025-03-10 | A self-sealing stop valve for power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119755351A true CN119755351A (en) | 2025-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510272418.6A Pending CN119755351A (en) | 2025-03-10 | 2025-03-10 | A self-sealing stop valve for power station |
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| CN (1) | CN119755351A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120926283A (en) * | 2025-10-14 | 2025-11-11 | 福建省真特阀门科技有限公司 | Anti-scouring stop valve |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204226669U (en) * | 2014-11-18 | 2015-03-25 | 自贡自高阀门有限公司 | Modified model choke stop evacuation valve |
| CN104864104A (en) * | 2015-05-22 | 2015-08-26 | 宋春光 | Safe one-way stop valve |
| CN105840889A (en) * | 2016-06-04 | 2016-08-10 | 江苏神通阀门股份有限公司 | Lifting type check valve |
| CN206503978U (en) * | 2017-01-23 | 2017-09-19 | 安徽斯瑞尔阀门有限公司 | A kind of lift check valve suitable for low-pressure fluid |
| CN110748653A (en) * | 2019-11-26 | 2020-02-04 | 深圳大学 | Pressure-maintaining core extractor flap valve with multi-stage sealing structure |
| CN112178209A (en) * | 2020-09-03 | 2021-01-05 | 湖北三江航天红峰控制有限公司 | Bellows type ultra-low temperature pneumatic stop valve |
| CN217108221U (en) * | 2022-01-21 | 2022-08-02 | 浙江远安流体设备有限公司 | High-precision adjusting spherical reversing valve |
| CN218510188U (en) * | 2022-11-01 | 2023-02-21 | 浙江持胜阀门科技有限公司 | Forged steel stop check valve |
| CN219017118U (en) * | 2022-08-18 | 2023-05-12 | 火链(广东)智能教育科技有限公司 | Intelligent education platform for cooking labor technology and height-adjustable upright post thereof |
| CN219549695U (en) * | 2023-02-03 | 2023-08-18 | 永一阀门集团有限公司 | Lining fluorine relief valve with fireproof function |
| CN221504078U (en) * | 2024-01-25 | 2024-08-09 | 胜得龙阀门(丽水)有限公司 | Adjustable check valve |
-
2025
- 2025-03-10 CN CN202510272418.6A patent/CN119755351A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204226669U (en) * | 2014-11-18 | 2015-03-25 | 自贡自高阀门有限公司 | Modified model choke stop evacuation valve |
| CN104864104A (en) * | 2015-05-22 | 2015-08-26 | 宋春光 | Safe one-way stop valve |
| CN105840889A (en) * | 2016-06-04 | 2016-08-10 | 江苏神通阀门股份有限公司 | Lifting type check valve |
| CN206503978U (en) * | 2017-01-23 | 2017-09-19 | 安徽斯瑞尔阀门有限公司 | A kind of lift check valve suitable for low-pressure fluid |
| CN110748653A (en) * | 2019-11-26 | 2020-02-04 | 深圳大学 | Pressure-maintaining core extractor flap valve with multi-stage sealing structure |
| CN112178209A (en) * | 2020-09-03 | 2021-01-05 | 湖北三江航天红峰控制有限公司 | Bellows type ultra-low temperature pneumatic stop valve |
| CN217108221U (en) * | 2022-01-21 | 2022-08-02 | 浙江远安流体设备有限公司 | High-precision adjusting spherical reversing valve |
| CN219017118U (en) * | 2022-08-18 | 2023-05-12 | 火链(广东)智能教育科技有限公司 | Intelligent education platform for cooking labor technology and height-adjustable upright post thereof |
| CN218510188U (en) * | 2022-11-01 | 2023-02-21 | 浙江持胜阀门科技有限公司 | Forged steel stop check valve |
| CN219549695U (en) * | 2023-02-03 | 2023-08-18 | 永一阀门集团有限公司 | Lining fluorine relief valve with fireproof function |
| CN221504078U (en) * | 2024-01-25 | 2024-08-09 | 胜得龙阀门(丽水)有限公司 | Adjustable check valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120926283A (en) * | 2025-10-14 | 2025-11-11 | 福建省真特阀门科技有限公司 | Anti-scouring stop valve |
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Application publication date: 20250404 |