Glasses valve sealing structure

Abstract

The utility model relates to the technical field of glasses valves, and provides a glasses valve sealing structure which comprises a valve plate, two valve seats arranged on the two opposite surfaces of the valve plate respectively and sealing rings arranged on the valve seats, the sealing rings have elasticity and are arranged close to the valve plate, flanges are arranged on the peripheral walls of the valve seats, and the sealing rings are arranged on the valve plates. The surface, close to the valve plate, of the flange is provided with a clamping groove allowing the sealing ring to be clamped and embedded in a sliding mode, the valve seat is provided with a control piece which introduces media into the sealing ring to enable the sealing ring to expand or discharges the media to enable the sealing ring to retract, and the two valve seats are the movable valve seat and the fixed valve seat respectively. The sealing ring has the beneficial effect that the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of eyeglass valves, and in particular to an eyeglass valve sealing structure. Background Art

[0002] The glasses valve, also known as the glasses plug valve or blind plate valve, is widely used in metallurgical, municipal and other gas pipelines. It is used to isolate, cut off or connect the gas channel. The glasses valve and eccentric valve combination is the most reliable and safest configuration that meets the requirements of the specification to cut off the gas medium, replacing the traditional water seal, blind plate, gate valve in the gas pipeline network. It has the characteristics of simple structure, easy operation, remote control, good sealing performance, etc., and is one of the indispensable important equipment in the gas pipeline system.

[0003] The core technology of the glasses valve is the reliability of the valve plate seal. The existing sealing structure is to install a rubber seal ring on the valve plate. One side of the valve seat seal is fixed and the other side is movable. The movable side must move a certain distance before the valve is opened and closed, so that the valve seat seal seat is separated from the valve plate seal ring and reaches the set distance. Only then can the valve plate start to move to the open or closed position, and then the movable valve seat is pressed against the valve plate seal ring to achieve a certain sealing pressure ratio to achieve sealing. Since the valve plate has a limited sealing gap with the valve seat during the opening and closing movement or rotation, especially for valves with larger diameters, there will be drift and shaking during the opening and closing movement of the valve plate, and the seal ring will be scratched, damaged, and the service life of the seal ring will be reduced, causing sealing failure; in addition, no matter whether the valve is in a closed or open working state, the seal ring must always be under pressure and reach a certain deformation to achieve sealing. Due to the large geometric size error of the large-diameter glasses valve, the seal ring needs to be compressed and deformed more. As the use time goes by, the rubber ages, the elasticity of the rubber ring will also deteriorate, and the service life of the seal ring will also be reduced, so further improvement is needed. Utility Model Content

[0004] In order to increase the service life of the sealing ring, the present application provides a glasses valve sealing structure.

[0005] The present application provides a glasses valve sealing structure, which adopts the following technical solution:

[0006] A glasses valve sealing structure comprises a valve plate, two valve seats respectively arranged on two opposite surfaces of the valve plate and a sealing ring arranged on the valve seat, wherein the sealing ring is elastic and arranged close to the valve plate, a flange is arranged on the outer peripheral wall of the valve seat, a groove for the sealing ring to slide and engage is provided on the surface of the flange close to the valve plate, the valve seat is provided with a control member for introducing a medium into the sealing ring to expand the sealing ring or discharging the medium to retract the sealing ring, and the two valve seats are respectively a movable valve seat and a fixed valve seat.

[0007] By adopting the above technical solution, the sealing ring is changed from being originally set on the valve plate to being on the valve seat. Before the valve plate is to perform an opening or closing action, the medium introduced into the sealing ring is released through the control component, so that the sealing ring retracts and is stored in the card slot, and then the movable valve seat is moved, so that the movable valve seat and the valve plate are separated to a certain distance. At this time, the possibility of the sealing ring scratching the sealing ring during the opening and closing movement of the valve plate can be reduced, thereby increasing the service life of the sealing ring. And when the sealing ring is deformed under pressure for a long time, affecting its elasticity and aging, the sealing ring can be expanded through the control component to further extend the service life of the sealing ring. When the valve plate is closed, the movable valve seat is moved after the valve plate is moved into place, so that the movable valve seat fits with the valve plate (a small gap). At this time, the medium is introduced into the sealing ring through the control component, and the sealing ring is pressed against the valve plate under the push of the medium to achieve valve sealing.

[0008] Preferably, the flange is provided with a fixing piece for fixing the sealing ring.

[0009] By adopting the above technical solution and providing a fixing piece, the connection strength and fixing effect between the sealing ring and the flange are improved, thereby reducing the possibility of the sealing ring slipping out of the groove during the expansion process.

[0010] Preferably, the sealing ring includes a sealing body arranged in an arc shape toward the valve seat and two mounting parts respectively arranged on the outer peripheral walls at both ends of the sealing body, and a receiving groove for retaining the medium is formed between the inner peripheral wall of the sealing body and the bottom inner wall of the slot; the slot includes a sliding groove for sliding connection of the sealing body and an embedding groove connected to the sliding groove, the width of the embedding groove on the axis of the valve seat is greater than the width of the sliding groove, the two mounting parts are embedded in the embedding groove, and the fixing piece is used to fix the mounting part.

[0011] By adopting the above technical solution, the sealing ring is fixed in the slot by embedding the mounting part in the embedding groove and then fixing the mounting part by the fixing member. At this time, the expansion and retraction are completed by the sealing body, and the mounting part is fixed by the fixing member to reduce the impact on the subsequent expansion or contraction of the sealing body.

[0012] Preferably, the fixing part includes a pressure ring and a fixing bolt passing through the pressure ring, the side wall of the slot is provided with a mounting groove for installing the pressure ring, the fixing bolt is threadedly connected to the bottom inner wall of the mounting groove, the side wall of the pressure ring is protrudingly provided with a clamping part, the surface of the clamping part close to the valve plate is flush with the surface of the pressure ring, and the clamping part abuts against the surface of the mounting part away from the slot.

[0013] By adopting the above technical solution, after the sealing ring is placed in the slot, the clamping part on the pressure plate is abutted against the surface of the mounting part away from the slot, and then the fixing bolt is passed through the pressure ring and the mounting slot for threaded connection, and the mounting part is pressed against the slot, so as to install the sealing ring in the slot.

[0014] Preferably, a first guide surface inclined toward the mounting portion is provided on a side wall of the pressing portion close to the sealing body.

[0015] By adopting the above technical solution, the first guide surface is arranged to adapt to the arc-shaped arrangement of the sealing body, thereby reducing the possibility that the sealing body rubs against the pressing part in the tube during the expansion process.

[0016] Preferably, an O-ring is provided between the pressure ring and the mounting groove, and a groove for the O-ring to be embedded is formed on the bottom inner wall of the mounting groove.

[0017] By adopting the above technical solution, the metal seal between the pressure ring and the flange is improved, so as to reduce the possibility of leakage of the introduced medium between the two.

[0018] Preferably, the two mounting parts are respectively a first mounting part and a second mounting part, and the height of the first mounting part in the direction of the valve seat axis is lower than the height of the second mounting part; the fixing part also includes a support ring, and the support ring includes a plurality of support plates spliced ​​together, one side wall of the support ring abuts against the inner surface of the first mounting part, the support ring abuts against the bottom inner wall of the slot, and the other side wall of the support ring abuts against the pressure ring, and the side walls of the support ring and the pressure ring abutting against each other are both provided with a second guide surface, and the surface of the second mounting part away from the sealing body abuts against the surface of the support ring close to the pressure ring.

[0019] By adopting the above technical solution, in the process of fixing the bolt through the pressure ring and being threadedly connected with the mounting groove, the pressure ring, in the process of pressing the mounting portion, as the support ring and the second guide surface of the pressure ring abut against each other, pushes the support ring to move in the direction close to the first mounting portion, so as to press the first mounting portion against the side wall of the embedding groove, so as to fix the first mounting portion and the second mounting portion, thereby reducing the operation, difficulty and production cost of fixing the two mounting portions separately by two pressure rings, and speeding up the fixing efficiency of the sealing ring.

[0020] Preferably, the outer peripheral wall of the flange is provided with a channel connected to the slot, the control component comprises a delivery pipe fixedly penetrated through the outer peripheral wall of the flange and connected to the channel, and the support ring is provided with a through hole connected to the through slot.

[0021] By adopting the above technical solution, the introduced medium enters into the containing groove through the conveying pipe, the channel and the through hole to expand the sealing body.

[0022] Preferably, the medium introduced into the sealing ring may be nitrogen or hydraulic oil.

[0023] By adopting the above technical solution, the chemical properties of the nitrogen introduced are relatively stable and relatively safe during use. The hydraulic oil can play a certain lubricating role.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. The sealing ring is changed from being originally set on the valve plate to being set on the valve seat. Before the valve plate is about to open or close, the medium introduced into the sealing ring is released through the control component, so that the sealing ring shrinks and is stored in the card slot. This can reduce the possibility of the sealing ring scratching the sealing ring during the opening and closing of the valve plate, thereby increasing the service life of the sealing ring. When the sealing ring is deformed under pressure for a long time, affecting its elasticity and aging, the control component can be used to expand the sealing ring to further extend its service life.

[0026] 2. By providing a fixing piece, the connection strength and fixing effect between the sealing ring and the flange are improved to reduce the possibility of the sealing ring slipping out of the slot during the expansion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the present application;

[0028] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A;

[0029] Figure 3 is a schematic diagram of the structure of the fixing member in the embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the top view structure of the support plate in the embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. valve plate; 2. valve seat; 3. sealing ring; 31. sealing body; 32. mounting portion; 321. first mounting portion; 322. second mounting portion; 33. accommodating groove; 4. flange; 41. slot; 411. slide groove; 412. embedding groove; 42. mounting groove; 43. groove; 44. threaded hole; 45. passage; 5. control member; 51. delivery pipe; 52. air pump; 53. air delivery pipe; 6. fixing member; 61. pressure ring; 611. clamping portion; 612. first guide surface; 62. fixing bolt; 63. support ring; 631. support plate; 632. through hole; 64. second guide surface; 7. O-ring. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 , further details of this application are given.

[0033] The embodiment of the present application discloses a glasses valve sealing structure.

[0034] Example:

[0035] A glasses valve sealing structure, referring to Figure 1 , Figure 2 , comprising a valve plate 1, two valve seats 2 respectively arranged on two opposite surfaces of the valve plate 1, and a sealing ring 3 arranged on the valve seat 2, wherein the two valve seats 2 are a movable valve seat 2 and a fixed valve seat 2 respectively.

[0036] Reference Figure 2 , Figure 3 In this embodiment, the sealing ring 3 is elastic and is arranged close to the valve plate 1. The outer peripheral wall of the valve seat 2 is provided with a flange 4 for installing the sealing ring 3. The surface of the flange 4 close to the valve plate 1 is provided with a groove 41 for sliding and inserting the sealing ring 3. The valve seat 2 is provided with a control member 5 for introducing a medium into the sealing ring 3 to expand the sealing ring 3 or for discharging the medium to shrink the sealing ring 3. It should be noted that the medium introduced into the sealing ring 3 can be nitrogen or hydraulic oil. In this embodiment, the medium is specifically nitrogen.

[0037] The sealing ring 3 specifically includes a sealing body 31 arranged in an arc shape toward the valve seat 2 and two mounting portions 32 respectively arranged on the outer peripheral walls at both ends of the sealing body 31. A receiving groove 33 for medium retention is formed between the inner peripheral wall of the sealing body 31 and the bottom inner wall of the slot 41. In this embodiment, the two ends of the sealing body 31 are located at different heights on the axis of the valve seat 2. The height is lower at the end close to the valve body or the height is lower at the end away from the valve body. It is specifically set according to the needs. In this embodiment, the height of the end of the sealing body 31 close to the valve body is set relatively low, so that the heights of the two mounting portions 32 are also relatively different. In this embodiment, the mounting portion 32 arranged close to the valve body is the first mounting portion 321, and the mounting portion 32 arranged away from the valve body is the second mounting portion 322. The height of the first mounting portion 321 in the direction of the axis of the valve seat 2 is lower than the height of the second mounting portion 322.

[0038] Correspondingly, the slot 41 specifically includes a slide slot 411 for sliding connection of the sealing body 31 and an embedding slot 412 connected to the slide slot 411. The width of the embedding slot 412 on the axis of the valve seat 2 is greater than the width of the slide slot 411. The first mounting portion 321 and the second mounting portion 322 are respectively embedded in the embedding slot 412.

[0039] The flange 4 is provided with a fixing member 6 for fixing the sealing ring 3. The fixing member 6 is specifically used to fix the mounting portion 32. Specifically, the fixing member 6 includes a pressure ring 61, a fixing bolt 62 penetrating the pressure ring 61, and a support ring 63 abutting against the pressure ring 61. In this embodiment, the pressure ring 61 is provided with one, the pressure ring 61 is coaxially arranged with the flange 4, and the side wall of the clamping groove 41 away from the valve seat 2 is provided with a mounting groove 42 for the pressure ring 61 to be installed. The side wall of the pressure ring 61 is protrudingly provided with a clamping portion 611, the surface of the clamping portion 611 close to the valve plate 1 is flush with the surface of the pressure ring 61, and the surface of the clamping portion 611 away from the valve plate 1 abuts against the surface of the second mounting portion 322 away from the clamping groove 41.

[0040] Furthermore, in order to adapt to the setting of the sealing body 31 in an arc shape, in this embodiment, the side wall of the pressing portion 611 close to the sealing body 31 is provided with a first guide surface 612 inclined toward the second mounting portion 322. In order to improve the metal seal between the pressing ring 61 and the flange 4 to reduce the possibility of leakage of the medium passed therebetween, in this embodiment, an O-type sealing ring 7 is provided between the pressing ring 61 and the mounting groove 42, and a groove 43 for the O-type sealing ring 7 to be embedded is provided around the inner wall of the bottom of the flange 4 located at the mounting groove 42, and the groove 43 is arranged to avoid the threaded hole 44.

[0041] There are a number of fixing bolts 62 spaced apart along the axis of the pressure ring 61 , and the specific number is set according to demand. The bottom inner wall of the mounting groove 42 is provided with threaded holes 44 for threaded connection of the fixing bolts 62 .

[0042] Reference Figure 3 , Figure 4 , wherein one side wall of the support ring 63 abuts against the inner surface of the first mounting portion 321, the surface of the support ring 63 away from the valve plate 1 abuts against the bottom inner wall of the slot 41, the other side wall of the support ring 63 abuts against the pressure ring 61, the side walls of the support ring 63 and the pressure ring 61 abutting against each other are both provided with a second guide surface 64, and the surface of the second mounting portion 322 away from the sealing body 31 abuts against the surface of the support ring 63 close to the pressure ring 61. It should be noted that the support ring 63 is composed of a plurality of support plates 631, and adjacent support plates 631 can be overlapped with each other.

[0043] Among them, the outer wall of the flange 4 is provided with a channel 45 connected to the slot 41, and the control component 5 specifically includes a delivery pipe 51 fixedly penetrated through the outer wall of the flange 4 and connected to the channel 45, an air pump 52 connected to the delivery pipe 51 and an air delivery pipe 53 connected to the air inlet of the air pump 52, and the support ring 63 is penetrated by a through hole 632 connected to the through slot.

[0044] The implementation principle of an eyeglass valve sealing structure in an embodiment of the present application is as follows: the sealing ring 3 is changed from being originally arranged on the valve plate 1 to being arranged on the valve seat 2; before the valve plate 1 is to perform an opening or closing action, the air pump 52 is started to release the nitrogen in the accommodating groove 33, so that the arc-shaped sealing body 31 is retracted into the card groove 41; then the movable valve seat 2 is started, so that the movable valve seat 2 and the valve plate 1 are separated to a certain distance, and then the movement of the valve plate 1 is started, that is, the opening or closing action is performed, thereby reducing the possibility of the sealing ring 3 scratching the sealing ring 3 during the opening and closing movement of the valve plate 1, thereby increasing the service life of the sealing ring 3.

[0045] After the valve plate 1 is moved into position, the movable valve seat 2 is moved so that the movable valve seat 2 fits against the valve plate 1 (with a small gap). At this time, the air pump 52 is started to introduce nitrogen into the receiving groove 33. The arc-shaped sealing body 31 is pushed against the valve plate 1 by the nitrogen pressure to achieve valve sealing.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A glasses valve sealing structure, characterized in that: The valve seat (2) comprises a valve plate (1), two valve seats (2) respectively arranged on two opposite surfaces of the valve plate (1), and a sealing ring (3) arranged on the valve seat (2); the sealing ring (3) is elastic and arranged close to the valve plate (1); a flange (4) is arranged on the outer peripheral wall of the valve seat (2); a groove (41) for the sealing ring (3) to slide and engage is provided on the surface of the flange (4) close to the valve plate (1); the valve seat (2) is provided with a control member (5) for introducing a medium into the sealing ring (3) to expand the sealing ring (3) or for discharging the medium to retract the sealing ring (3); the two valve seats (2) are respectively a movable valve seat (2) and a fixed valve seat (2).

2. The eyeglass valve sealing structure according to claim 1, characterized in that: The flange (4) is provided with a fixing member (6) for fixing the sealing ring (3).

3. The eyeglass valve sealing structure according to claim 2, characterized in that: The sealing ring (3) comprises a sealing body (31) arranged in an arc shape toward the valve seat (2) and two mounting portions (32) respectively arranged on the outer peripheral walls at both ends of the sealing body (31); a receiving groove (33) for retaining a medium is formed between the inner peripheral wall of the sealing body (31) and the bottom inner wall of the clamping groove (41); the clamping groove (41) comprises a sliding groove (411) for sliding connection of the sealing body (31) and a clamping groove (412) connected to the sliding groove (411); the width of the clamping groove (412) located on the axis of the valve seat (2) is greater than the width of the sliding groove (411); the two mounting portions (32) are clamped in the clamping groove (412); and the fixing member (6) is used to fix the mounting portion (32).

4. The eyeglass valve sealing structure according to claim 3, characterized in that: The fixing member (6) comprises a pressure ring (61) and a fixing bolt (62) passing through the pressure ring (61); a side wall of the clamping groove (41) is provided with a mounting groove (42) for mounting the pressure ring (61); the fixing bolt (62) is threadedly connected to the bottom inner wall of the mounting groove (42); a clamping portion (611) is protrudingly provided on the side wall of the pressure ring (61); a surface of the clamping portion (611) close to the valve plate (1) is flush with a surface of the pressure ring (61); and the clamping portion (611) abuts against a surface of the mounting portion (32) away from the clamping groove (41).

5. The eyeglass valve sealing structure according to claim 4, characterized in that: A first guide surface (612) is provided on a side wall of the pressing portion (611) close to the sealing body (31) and is arranged obliquely towards the mounting portion (32).

6. The eyeglass valve sealing structure according to claim 4, characterized in that: An O-type sealing ring (7) is arranged between the pressure ring (61) and the installation groove (42), and a groove (43) for the O-type sealing ring (7) to be embedded is formed on the bottom inner wall of the installation groove (42).

7. The eyeglass valve sealing structure according to claim 4, characterized in that: The two mounting portions (32) are respectively a first mounting portion (321) and a second mounting portion (322); the height of the first mounting portion (321) in the axial direction of the valve seat (2) is lower than the height of the second mounting portion (322); the fixing member (6) further comprises a support ring (63), the support ring (63) comprises a plurality of support plates (631) spliced ​​together, one side wall of the support ring (63) abuts against the inner surface of the first mounting portion (321), the support ring (63) abuts against the bottom inner wall of the clamping groove (41), the other side wall of the support ring (63) abuts against the pressure ring (61), the side walls of the support ring (63) and the pressure ring (61) abutting against each other are both provided with a second guide surface (64), and the surface of the second mounting portion (322) away from the sealing body (31) abuts against the surface of the support ring (63) close to the pressure ring (61).

8. The eyeglass valve sealing structure according to claim 7, characterized in that: The outer wall of the flange (4) is provided with a channel (45) connected to the slot (41); the control member (5) comprises a delivery pipe (51) fixedly arranged through the outer wall of the flange (4) and connected to the channel (45); and the support ring (63) is provided with a through hole (632) connected to the through slot.

9. The eyeglass valve sealing structure according to claim 1, characterized in that: The medium introduced into the sealing ring (3) may be nitrogen or hydraulic oil.

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