CN114110242B - Double-diaphragm sealing structure - Google Patents
Double-diaphragm sealing structure Download PDFInfo
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- CN114110242B CN114110242B CN202111355586.XA CN202111355586A CN114110242B CN 114110242 B CN114110242 B CN 114110242B CN 202111355586 A CN202111355586 A CN 202111355586A CN 114110242 B CN114110242 B CN 114110242B
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- 238000007789 sealing Methods 0.000 title claims abstract description 77
- 230000036316 preload Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 5
- 239000012528 membrane Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The application relates to a double-diaphragm sealing structure relates to the technical field of switch control valves, and the valve comprises a valve body, a valve seat arranged on the inner wall of the valve body and a valve core arranged in the valve body in a rotating mode, wherein the valve seat slides to be abutted to the valve core, a mounting ring is fixed on the side wall of an inner cavity of the valve body, the mounting ring is sleeved on the outer wall of the valve seat, two side walls of the mounting ring and two side walls of the valve seat are respectively matched one by one to form two diaphragm ring grooves, and diaphragms are arranged in the two diaphragm ring grooves in a sealing mode. The steam flowing through the ball valve is utilized to squeeze the diaphragm, the valve seat is pushed to move towards the direction of the valve core and tightly support the valve core, and sealing of the ball valve is achieved. The high-pressure steam in the ball valve is blocked by the two oppositely arranged diaphragms, the risk that the high-pressure steam enters the cavity between the two diaphragms is reduced, the high-pressure steam in the cavity pushes the diaphragms to the direction that the two diaphragms are far away from each other, the risk that the diaphragms are separated in the diaphragm ring grooves is caused, and the problem that the sealing of the valve core and the valve seat is unstable is solved.
Description
Technical Field
The application relates to the technical field of switch control valves, in particular to a double-diaphragm sealing structure.
Background
The control valve is also called a stop valve in the field of maritime work and ships, and is a valve in which a valve rod drives an opening and closing member to rotate around the axis of the valve rod. The control valve is mainly used in the line to shut off, distribute and change the flow direction of the medium. In China, the control valve is widely applied to industries such as petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and plays a role in national economy.
The control valve is a piston type floating valve generally because of its excellent flow resistance and sealing performance, and can automatically compensate the gap between the valve seat and the valve core due to shrinkage or expansion of the material caused by temperature change under the action of the load of the elastic piece and the pressure of the medium, thereby ensuring the sealing performance between the valve seat and the valve core. In the related art, the control valve comprises a valve body, a valve seat which is arranged in the valve body in a floating manner, a valve core which is arranged in the valve seat in a rotating manner, and a valve rod which is used for rotating the valve core, wherein the valve rod realizes the switching control of the control valve through the rotation of the valve core. In order to improve the control effect of the valve, namely the sealing performance of the valve, a sealing ring is often arranged between the valve body and the valve seat so as to realize the sealing between the floating valve seat and the valve body, and the sealing ring is generally made of rubber or graphite according to different application scenes.
In view of the above related art, the inventor finds that, under the influence of the material of the sealing ring, in an extreme temperature environment, the rubber sealing washer will be brittle failure or burnout failure, the graphite sealing washer will be expanded and deformed to squeeze the valve seat, so as to cause the valve seat to be sealed and fail, the two types of sealing rings are not fully suitable for all working conditions with the temperature range of-256 ℃ to +800 ℃, the sealing member is easy to deform and fail under the extreme environment condition, and the sealing between the valve core and the valve seat is unstable.
Disclosure of Invention
In order to solve the problem of unstable sealing between the valve core and the valve seat, the application provides a double-diaphragm sealing structure.
The application provides a double diaphragm seal structure adopts following technical scheme:
the utility model provides a two diaphragm seal structure, includes the valve body, installs disk seat on the valve body inner wall and rotates and install the internal case of valve, the disk seat slides and supports tightly on the case, be fixed with the collar on the inner chamber lateral wall of valve body, the collar cover is established on the outer wall of disk seat, the both sides wall of collar with the both sides wall of disk seat respectively one-to-one forms two diaphragm annular, two equal sealing arrangement has the diaphragm in the diaphragm annular.
Through adopting above-mentioned technical scheme, through seting up the diaphragm annular at the both sides wall of collar and disk seat to seal in two diaphragm annular and set up the diaphragm, the disk seat produces the gap to the valve core in-process that moves tightly between valve body and the disk seat, and the medium in the control valve gets into along the gap and acts on the diaphragm of keeping away from the valve core, and the diaphragm takes place to warp and promotes the valve seat to move tightly to the valve core, realizes the sealing of disk seat and valve core, reduces the risk that the medium flows from the gap between disk seat and the valve core. Meanwhile, the diaphragm blocks high-pressure steam acting on the diaphragm, so that the risk of medium leakage caused by medium flowing out of a gap between the valve seat and the mounting ring is reduced.
In the rotating process of the valve core, a gap is still generated between the valve core and the valve seat, so that the medium in the control valve flows into the gap to react on the diaphragm far away from the valve core, and finally the diaphragm far away from the valve core is dropped. The membrane close to the valve core blocks the medium which is reacted on the membrane far away from the valve core, so that the medium cannot act on the membrane far away from the valve core, the stability of the cooperation of the membrane and the membrane ring groove is improved, and the problem of unstable sealing between the valve core and the valve seat is solved.
Optionally, the diaphragm includes the closing plate, and set up the connecting plate of closing plate both sides, two the connecting plate respectively with the cell wall fixed connection of diaphragm annular.
By adopting the technical scheme, the two connecting plates are in sealing connection with the diaphragm ring groove, so that the contact area between the diaphragm and the wall of the diaphragm ring groove is increased, and the connection stability of the diaphragm and the wall of the diaphragm ring groove is improved; meanwhile, the sealing effect of the connection between the diaphragm and the wall of the diaphragm ring groove is improved, and the risk that high-temperature and high-pressure steam enters a cavity between the two diaphragms along the gap between the diaphragm and the wall of the diaphragm ring groove is reduced.
Optionally, a diaphragm inner ring and a diaphragm outer ring are installed in the diaphragm ring groove, the diaphragm inner ring is sleeved and pressed on the outer wall of the connecting plate, the diaphragm outer ring is abutted against the inner wall of the other connecting plate, and a snap ring gap is formed between the diaphragm inner ring and the diaphragm outer ring.
Through adopting above-mentioned technical scheme, diaphragm inner ring and diaphragm outer loop support tightly the extrusion to the connecting plate of diaphragm, improve diaphragm and diaphragm annular complex stability, reduce the risk that the diaphragm breaks away from.
Optionally, the sealing plate is provided with a plurality of peaks, and the number of the peaks is set to be multiple.
Through adopting above-mentioned technical scheme, the crest makes the diaphragm possess certain stretch and spread for when the disk seat removed, diaphragm and disk seat can remain connected state throughout, when reducing the disk seat and remove, the risk that diaphragm and disk seat break away from. The wave crests further improve stretching effect of the diaphragm, so that axial displacement distance of the valve seat is increased under the condition that the diaphragm is not separated from the valve seat.
The inner wall of the valve seat, which is abutted against the mounting ring, is provided with a plurality of sealing grooves, a plurality of sealing gaskets are arranged in the sealing grooves, and the sealing gaskets are abutted against the inner wall of the mounting ring.
Through adopting above-mentioned technical scheme, through set up a plurality of seal grooves and set up sealing washer in the seal groove at the outer wall of disk seat, utilize seal groove and sealing washer to carry out the interval seal to two diaphragms, after the damaged inefficacy of unilateral diaphragm, reduce high-pressure steam and extrude another diaphragm, lead to another diaphragm to break away from the risk that leads to sealing failure from in the diaphragm annular, play the effect of secondary seal protection. In addition, because a gap is formed between the mounting ring and the valve seat, the sealing groove and the sealing gasket are used for facilitating the coaxial positioning of the valve seat and the mounting ring, namely, the coaxial positioning of the valve seat and the valve body.
Optionally, the membrane is connected with the groove wall of the membrane ring groove in a welding mode.
Through adopting above-mentioned technical scheme, the diaphragm and the cell wall welded connected mode of diaphragm annular for the diaphragm is more stable with the collar and the diaphragm is connected with the disk seat, has improved the sealing performance of diaphragm simultaneously, has strengthened the rigidity of diaphragm and collar junction, improves the wholeness of collar, diaphragm and disk seat.
Optionally, the diaphragm is connected with the groove wall of the diaphragm ring groove in a bolt loading manner.
Through adopting above-mentioned technical scheme, the diaphragm is connected through the mode that the screw thread closed with the diaphragm annular, realizes the demountable installation of diaphragm in the diaphragm annular, and the diaphragm is more reliable with the connection of diaphragm annular.
Optionally, a clamping groove is formed in the side wall of the valve body, and the mounting ring is inserted and fixed in the clamping groove.
Through adopting above-mentioned technical scheme, utilize the draw-in groove to carry out radial spacing fixed to the valve body, the installation of convenient collar in the valve body improves the stability that collar and valve body are connected, reduces the risk that collar and valve body produced relative displacement.
Optionally, a preload structure is further provided between the valve body and the valve seat, the preload structure includes an elastic piece seat abutting against the valve seat, a mounting groove provided on the elastic piece seat and close to the end face of the valve body, and an elastic piece mounted in the mounting groove, one end of the elastic piece abuts against the end face of the valve body close to the elastic piece seat, and the other end of the elastic piece abuts against the bottom of the mounting groove.
Through adopting above-mentioned technical scheme, under the elastic force of elastic component, the elastic component passes through the elastic component seat and promotes the disk seat along the axis direction for the tip of disk seat is the butt on the case all the time, realizes the initial seal of disk seat.
Optionally, the disk seat lateral wall fixedly connected with is used for carrying out spacing compressing tightly subassembly to the collar, compressing tightly the subassembly including the cover establish the holding-down ring and the spacing ring of collar outer wall, inlay establish and install many open loops on the valve body and wear to establish fixing bolt in the spacing ring, holding-down ring's outer wall and lateral wall all with complain search for fox valve body looks butt, just holding-down ring keep away from the lateral wall of valve body with many open loops looks butt, many open loops screw thread closes soon and compresses tightly on the outer wall of spacing ring, the outer wall of spacing ring still with valve body looks butt, fixing bolt passes in proper order the installation ring with holding-down ring with valve body fixed connection.
Through adopting above-mentioned technical scheme, the bolt is fixed the collar through the spacing ring, and many open-loops carry out the extrusion location of lateral wall to the restriction ring, realize the restriction ring to the spacing of collar in the diameter direction, improve the stability that compresses tightly the subassembly to many open-loops is fixed to compress tightly.
In summary, the present application includes at least one of the following beneficial technical effects:
the diaphragm ring grooves are formed in the two side walls of the mounting ring and the valve seat, the diaphragms are arranged in the two diaphragm ring grooves in a sealing mode, steam flowing through the ball valve extrudes the diaphragms, and the valve seat is pushed to move towards the valve core and abut against the valve core, so that the ball valve is sealed. The two oppositely arranged diaphragms block high-pressure steam in the ball valve together, so that the risk that the high-pressure steam enters a cavity between the two diaphragms is reduced, the high-pressure steam in the cavity pushes the diaphragms in the direction that the two diaphragms are far away from each other, the risk that the diaphragms are separated in the diaphragm ring grooves is caused, and the problem that the sealing between the valve core and the valve seat is unstable is solved;
the two connecting plates are in sealing connection with the diaphragm ring groove, so that the contact area between the diaphragm and the wall of the diaphragm ring groove is increased, and the connection stability of the diaphragm and the wall of the diaphragm ring groove is improved; meanwhile, the sealing effect of the connection between the diaphragm and the wall of the diaphragm ring groove is improved, and the risk that high-temperature and high-pressure steam enters a cavity between the two diaphragms along a gap between the diaphragm and the wall of the diaphragm ring groove is reduced;
the diaphragm inner ring and the diaphragm outer ring are arranged in the diaphragm ring groove, and the diaphragm inner ring and the diaphragm outer ring are in sealing connection with the diaphragm ring groove by utilizing the two connecting plates, so that the contact area between the diaphragm and the groove wall of the diaphragm ring groove is increased, and the connection stability of the diaphragm and the groove wall of the diaphragm ring groove is improved; meanwhile, the sealing effect of the connection between the diaphragm and the wall of the diaphragm ring groove is improved, and the risk that high-temperature and high-pressure steam enters a cavity between the two diaphragms along the gap between the diaphragm and the wall of the diaphragm ring groove is reduced.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1 of the present application.
Fig. 2 is a schematic cross-sectional view showing a membrane according to embodiment 1 of the present application.
Fig. 3 is an enlarged schematic view of a portion of the structure a of fig. 2.
Fig. 4 is a schematic view showing an assembling relationship of a seal structure according to embodiment 2 of the present application.
Reference numerals illustrate: 1. a valve body; 2. a valve seat; 3. a clamping groove; 4. a mounting ring; 5. a compression assembly; 51. a containment ring; 52. a limiting ring; 53. multiple open loops; 54. a fixing bolt; 6. a diaphragm ring groove; 7. a membrane; 71. a sealing plate; 72. a connecting plate; 8. a diaphragm inner ring; 9. a diaphragm outer ring; 10. a clasp gap; 11. a peak; 12. a preload structure; 121. an elastic piece seat; 122. a mounting groove; 123. an elastic member 13, a seal groove; 14. a sealing gasket; 15. and a valve core.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a double-diaphragm sealing structure.
Example 1:
referring to fig. 1 and 2, a double diaphragm seal structure includes a valve body 1, a mounting ring 4 fixedly mounted on the valve body 1 by a pressing assembly 5, a valve seat 2 penetrating into the mounting ring 4, and a preload structure 12 provided between the valve seat 2 and the valve body 1. The outer wall of the valve seat 2 is abutted with the inner wall of the mounting ring 4, diaphragm ring grooves 6 are formed on two side walls of the valve seat 2, which are close to the abutting positions of the mounting ring 4, diaphragms 7 are respectively installed in the two diaphragm ring grooves 6, and the preload structure 12 is used for pushing the valve seat 2 towards the valve core in the axial direction, so that the valve seat 2 is always abutted with the valve core, and an initial sealing effect is achieved.
In the process that the valve seat 2 moves towards the valve core 15, media in the control valve enter the diaphragm 7 which acts on the valve core far away from the valve core along the gap, the diaphragm 7 deforms to push the valve seat 2 to move towards the valve core 15 to abut against, sealing abutting of the valve seat 2 and the valve core 15 is achieved, and the risk that the media flow out of the gap between the valve seat 2 and the valve core 15 is reduced. At the same time, the diaphragm 7 blocks high-pressure steam acting on the diaphragm, so that the risk of medium leakage caused by medium flowing out of a gap between the valve seat 2 and the mounting ring 4 is reduced. The membrane 7 close to the valve core 15 blocks the medium which is reacted on the membrane 7 far away from the valve core 15, so that the medium cannot act on the membrane 7 far away from the valve core 15, the stability of the cooperation of the membrane 7 and the membrane ring groove 6 is improved, the membrane 7 made of metal materials can adapt to the environment with high temperature and high pressure, and the problem of unstable sealing between the valve core 15 and the valve seat 2 is solved.
Referring to fig. 2 and 3, any diaphragm 7 includes an annular sealing plate 71 and connecting plates 72 integrally formed at two ends of the sealing plate 71, the connecting plates 72 are located at the same side of the sealing plate 71, the diaphragm 7 is a plate or a section bar made by punching, and the two connecting plates 72 of the diaphragm 7 are connected with the groove wall of the diaphragm groove 6 in a screw thread screwing and compacting manner, so that sealing and fixing of the diaphragm 7 in the diaphragm groove 6 are realized. The mode of screw thread screwing and pressing realizes the detachable installation of the diaphragm 7 in the diaphragm ring groove 6, so that the connection between the diaphragm 7 and the diaphragm ring groove 6 is more reliable. One end of the control valve is provided with a diaphragm 7 and a diaphragm ring groove 6 which are symmetrically arranged about the radial bisection plane of the mounting ring 4, the two diaphragms 7 jointly block high-pressure steam in the ball valve, and the risk that the high-pressure steam enters between the two diaphragms 7 and causes the diaphragms 7 to break away in the diaphragm ring groove 6 is reduced.
The peak 11 is formed in the central position of the connecting plate 72, and the peak 11 enables the diaphragm 7 to have certain stretching performance, so that when the valve seat 2 moves, the diaphragm 7 and the valve seat 2 can be always kept in a connected state, and the risk that when the valve seat 2 moves, the diaphragm 7 and the valve seat 2 are separated is reduced. The number of the peaks 11 may be one or more, the number of the peaks 11 may be adjusted according to the displacement amount set by the valve seat 2, and the larger the movement amount set by the valve seat 2 is, the larger the number of the peaks 11 is required. The plurality of wave crests 11 further improve stretching effect of the diaphragm 7, so that the axial displacement distance of the valve seat 2 is increased under the condition that the diaphragm 7 is not separated from the valve seat 2.
The diaphragm 7 is installed to two side wall joint that are close to each other and is had diaphragm inner ring 8 and diaphragm outer loop 9, is formed with snap ring clearance 10 between diaphragm 7 and the diaphragm outer loop 9, and diaphragm inner ring 8 cover is established on the connecting plate 72 of diaphragm 7, compresses tightly diaphragm 7 inner wall on disk seat 2 outer wall, and diaphragm outer loop 9 butt is on another connecting plate 72 of diaphragm 7, compresses tightly diaphragm 7 outer wall on the inner wall of collar 4. The diaphragm inner ring 8 and the diaphragm outer ring 9 act on the diaphragm 7 together, so that the risk that the diaphragm 7 is separated from the diaphragm 7 groove is reduced, the two side walls of the diaphragm 7, which are in contact with the diaphragm ring groove 6, are pressed, and the risk that the two side walls of the diaphragm 7 are deformed is reduced.
A plurality of sealing grooves 13 are formed in the inner wall of the valve seat 2, which is abutted against the mounting ring 4, sealing gaskets 14 are mounted in the sealing grooves 13, the sealing gaskets 14 are abutted against the inner wall of the mounting ring 4, preferably, the number of the sealing grooves 13 and the sealing gaskets 14 is three, and the sealing gaskets are uniformly arranged on the valve seat 2. The sealing groove 13 and the sealing gasket 14 are utilized to seal the two diaphragms 7 at intervals, so that the secondary sealing protection function is realized, and after the single-side diaphragm 7 is damaged and fails, the risk that the other diaphragm 7 is separated from the diaphragm ring groove 6 to cause sealing failure due to the fact that high-pressure steam extrudes the other diaphragm 7 is reduced. In addition, due to the clearance between the mounting ring 4 and the valve seat 2, the sealing groove 13 and the sealing gasket 14 are utilized to facilitate the coaxial positioning of the valve seat 2 and the mounting ring 4, namely, the coaxial positioning of the valve seat 2 and the valve body 1.
The preload structure 12 comprises an elastic member seat 121 abutted against the valve seat 2, a mounting groove 122 formed in the end face of the elastic member seat 121 close to the valve body 1, and an elastic member 123 mounted in the mounting groove 122, wherein one end of the elastic member 123 is abutted against the end face of the valve body 1 close to the elastic member seat 121, and the other end is abutted against the bottom of the mounting groove 122. In this embodiment, the elastic member 123 may be a disc spring or a wave spring. Under the elastic force of the elastic piece 123, the elastic piece 123 pushes the valve seat 2 along the axial direction through the elastic piece seat 121, so that the end part of the valve seat 2 is always abutted on the valve core, and the initial sealing of the valve seat 2 is realized.
The compressing assembly 5 comprises a clamping groove 3 formed in the inner wall of the valve body 1, a holding ring 51 and a limiting ring 52 sleeved on the outer wall of the compression ring of the diaphragm 7, a multi-ring opening 53 abutted against the inner wall of the valve body 1, and a fixing bolt 54 penetrating through the limiting ring 52. The mounting ring 4 is fixedly inserted into the clamping groove 3 in a plugging manner, the clamping groove 3 is radially limited, and the side wall and the outer wall of the holding ring 51 are propped against the valve body 1; the multiple open rings 53 can be three open rings or four open rings, in the embodiment of the application, the multiple open rings 53 are three open rings, the multiple open rings 53 are fixed in a pressure ring groove formed in the valve body 1, the side wall of the holding-down ring 51 far away from the valve body 1 is abutted, and the holding-down ring 51 is sleeved on the outer wall of the mounting ring 4; the limiting ring 52 is abutted against the side wall of the mounting ring 4, the mounting ring 4 is abutted and fixed on the clamping groove 3, and the fixing bolts 54 sequentially penetrate through the mounting ring 4 and the holding-down ring 51 to be fixedly connected with the valve body 1.
The implementation principle of the double-diaphragm sealing structure in the embodiment of the application is as follows: when the ball valve works, high-temperature and high-pressure steam flows into the diaphragm ring groove 6 along the gap between the elastic piece seat 121 and the valve seat 2 through the snap ring gap 10, the diaphragm 7 in the valve seat 2 and the diaphragm ring groove 6 is extruded, and under the combined action of the preload structure 12 and the high-temperature and high-pressure steam on the diaphragm 7, the valve seat 2 moves towards the valve core and abuts against the valve core, so that the sealing effect is realized, and the problem of unstable sealing between the valve core and the valve seat 2 is solved.
Example 2:
referring to fig. 4, the embodiment of the present application is different from the embodiment in that the connection manner of the diaphragm 7 and the diaphragm 7 groove is different, the diaphragm 7 and the diaphragm 7 groove are connected by welding, and the connection plate 72 of the diaphragm 7 is welded with the two groove walls of the diaphragm ring groove 6. The welded connection mode ensures that the connection between the diaphragm 7 and the gasket is more stable, improves the sealing performance of the diaphragm 7, enhances the rigidity of the connection part between the diaphragm 7 and the mounting ring 4, and improves the integrity of the mounting ring 4, the diaphragm 7 and the valve seat 2.
The implementation principle of the embodiment 2 is as follows: the mode of welding the diaphragm 7 with the mounting ring 4 and the diaphragm 7 with the valve seat 2 makes the connection between the diaphragm 7 and the gasket more stable, improves the sealing performance of the diaphragm 7, enhances the rigidity of the connection part of the diaphragm 7 and the mounting ring 4, and improves the integrity of the mounting ring 4, the diaphragm 7 and the valve seat 2.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (6)
1. The utility model provides a double diaphragm seal structure, includes valve body (1), installs disk seat (2) on valve body (1) inner wall and rotates and install case (15) in valve body (1), disk seat (2) slip is supported tightly on case (15), its characterized in that: a mounting ring (4) is fixed on the side wall of the inner cavity of the valve body (1), the mounting ring (4) is sleeved on the outer wall of the valve seat (2), two side walls of the mounting ring (4) and two side walls of the valve seat (2) are respectively matched one by one to form two diaphragm ring grooves (6), and diaphragms (7) are hermetically arranged in the two diaphragm ring grooves (6);
a preload structure (12) is further arranged between the valve body (1) and the valve seat (2), the preload structure (12) comprises an elastic piece seat (121) which is abutted against the valve seat (2), an installation groove (122) which is formed in the elastic piece seat (121) and is close to the end face of the valve body (1), and an elastic piece (123) which is installed in the installation groove (122), one end of the elastic piece (123) is abutted against the end face, close to the elastic piece seat (121), of the valve body (1), and the other end of the elastic piece is abutted against the groove bottom of the installation groove (122);
the diaphragm (7) comprises a sealing plate (71) and connecting plates (72) arranged on two sides of the sealing plate (71), and the two connecting plates (72) are fixedly connected with the groove walls of the diaphragm ring groove (6) respectively; a diaphragm inner ring (8) and a diaphragm outer ring (9) are arranged in the diaphragm ring groove (6), the diaphragm inner ring (8) is sleeved and pressed on the outer wall of the connecting plate (72), the diaphragm outer ring (9) is abutted against the inner wall of the other connecting plate (72), and a clamping ring gap (10) is formed between the diaphragm inner ring (8) and the diaphragm outer ring (9); the sealing plate (71) is provided with peaks (11), and the number of the peaks (11) is set to be single or multiple.
2. A dual diaphragm seal structure according to claim 1, wherein: the valve seat (2) is provided with a plurality of seals (13) on the inner wall abutted against the mounting ring (4), a plurality of sealing gaskets (14) are arranged in the seals (13), and the sealing gaskets (14) are abutted against the inner wall of the mounting ring (4).
3. A dual diaphragm seal structure according to claim 1, wherein: the diaphragm (7) is connected with the groove wall of the diaphragm ring groove (6) in a welding mode.
4. A dual diaphragm seal structure according to claim 1, wherein: the diaphragm (7) is connected with the groove wall of the diaphragm ring groove (6) in a bolt loading mode.
5. A dual diaphragm seal structure according to claim 1, wherein: the side wall of the valve body (1) is provided with a clamping groove (3), the mounting ring (4) is fixedly inserted into the clamping groove (3), and a soft gasket, a hard gasket or a body seal can be arranged in the clamping groove (3).
6. A dual diaphragm seal structure according to claim 1, wherein: the valve seat (2) lateral wall fixedly connected with is used for carrying out spacing clamp assembly (5) to collar (4), clamp assembly (5) are including the cover to be established hold-down ring (51) and spacing ring (52) of collar (4) outer wall, inlay establish install many open rings (53) on valve body (1) and wear to establish fixing bolt (54) in spacing ring (52), the outer wall and the lateral wall of hold-down ring (51) all with valve body (1) looks butt, just hold-down ring (51) keep away from the lateral wall of valve body (1) with many open rings (53) looks butt, many open rings (53) screw thread spin compress tightly on the outer wall of spacing ring (52), the outer wall of spacing ring (52) still with valve body (1) looks butt, fixing bolt (54) pass in proper order collar (4) with hold-down ring (51) with valve body (1) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355586.XA CN114110242B (en) | 2021-11-16 | 2021-11-16 | Double-diaphragm sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355586.XA CN114110242B (en) | 2021-11-16 | 2021-11-16 | Double-diaphragm sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114110242A CN114110242A (en) | 2022-03-01 |
| CN114110242B true CN114110242B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111355586.XA Active CN114110242B (en) | 2021-11-16 | 2021-11-16 | Double-diaphragm sealing structure |
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| CN (1) | CN114110242B (en) |
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| CN107559449A (en) * | 2017-10-20 | 2018-01-09 | 上海阀门厂股份有限公司 | A kind of multi-state valve sealing structure |
| CN208565627U (en) * | 2018-06-27 | 2019-03-01 | 上海阀门厂股份有限公司 | A kind of spool back-end sealing structure |
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2021
- 2021-11-16 CN CN202111355586.XA patent/CN114110242B/en active Active
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| DE1454732A1 (en) * | 1964-02-27 | 1969-03-13 | Vaillant Joh Kg | Water switch for gas water heater |
| CH600221A5 (en) * | 1976-08-17 | 1978-06-15 | Int Standard Electric Corp | Flow proportional control valve between two channels |
| CN2926698Y (en) * | 2006-04-07 | 2007-07-25 | 李洪 | Fixed membrane metal sealed spherical valve |
| WO2013078865A1 (en) * | 2011-11-30 | 2013-06-06 | Danfoss (Tianjin) Ltd. | Check valve |
| CN107559449A (en) * | 2017-10-20 | 2018-01-09 | 上海阀门厂股份有限公司 | A kind of multi-state valve sealing structure |
| CN208565627U (en) * | 2018-06-27 | 2019-03-01 | 上海阀门厂股份有限公司 | A kind of spool back-end sealing structure |
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| CN114110242A (en) | 2022-03-01 |
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