High-pressure gas well valve seat compensation sealing device

Abstract

The utility model relates to the technical field of valves, and discloses a high-pressure gas well valve seat compensation sealing device which comprises a valve seat. The cross section of the sealing ring is in a step shape, the sealing ring is embedded in an annular groove formed in the valve seat, and a compensation gasket used for compensating the sealing effect of the sealing ring is arranged on the bottom side of the sealing ring; the bottom of the compensation gasket is clamped to the inner bottom face of the annular groove, the upper portion of the compensation gasket protrudes to form a locking plate which limits and locks the sealing ring, and the top of the locking plate protrudes to the surface of the sealing ring to form a scraper. The stepped compensation gasket and the sealing ring are arranged and matched with the check ring to be interlocked in the valve seat in a three-in-one mode, the connecting structure is stable, the compensation gasket and the check ring strengthen the sealing effect, the sealing ring is prevented from twisting and deforming, gaps are prevented from occurring in the contact face, and the sealing effect is good. And meanwhile, a scraping plate is formed when a locking plate on the compensation gasket is matched with a sealing ring for locking, impurities adsorbed on the outer wall of the valve element can be cleaned to a certain degree, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a high pressure gas well valve seat compensation sealing device. BACKGROUND

[0002] Valves are control components in fluid conveying systems, with functions of cutting off, regulating, guiding flow, preventing reverse flow, stabilizing pressure, dividing flow or overflow pressure relief, etc. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, etc.

[0003] During the exploitation process of gas wells, the sealing surface will be continuously worn due to erosion, which will lead to damage of the sealing surface and failure of the valve seat sealing after a long time. However, the current high-pressure valve seat sealing structure is mostly FLS or "O" ring sealing, which is easy to deform and damage to produce gaps, and the sealing effect is limited.

[0004] Therefore, the applicant proposes a high-pressure gas well valve seat compensation sealing device to improve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a high-pressure gas well valve seat compensation sealing device to prevent the sealing ring from twisting and deforming and the contact surface from having gaps, and to have good sealing effect to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high-pressure gas well valve seat compensation sealing device, comprising:

[0007] a valve seat;

[0008] a sealing ring, which is embedded in an annular groove formed in the valve seat and has a stepped cross-section, and the bottom side of the sealing ring is provided with a compensation gasket for compensating the sealing effect of the sealing ring;

[0009] the compensation gasket is clamped into the bottom surface of the annular groove, and the locking plate protruding from the upper part of the compensation gasket limits and locks the sealing ring, and the top of the locking plate protrudes to the surface of the sealing ring to form a scraper.

[0010] As an optional scheme of the high-pressure gas well valve seat compensation sealing device of the utility model, the compensation gasket has a stepped cross-section, and the bottom surface is integrally connected with a ring-shaped clamping strip, the clamping strip is an arc-shaped strip, and the central angle between the end portions of adjacent clamping strips is not more than 20°.

[0011] As an optional scheme of the high-pressure gas well valve seat compensation sealing device of the utility model, the bottom surface of the annular groove is provided with a clamping groove corresponding to the clamping strip, and the clamping strip is inserted into the clamping groove one by one.

[0012] As an optional scheme of the high-pressure gas well valve seat compensation sealing device, the locking plate is vertically arranged, an insertion slot is formed on the sealing ring, the locking plate protrudes through the insertion slot, and the locking plate side part sealingly abuts against the inner wall of the insertion slot.

[0013] As an optional scheme of the high-pressure gas well valve seat compensation sealing device, the outer wall of the sealing ring is provided with a slidingly connected check ring, the check ring is slidingly installed in the annular groove, and the bottom of the check ring jointly locks the compensation gasket and the sealing ring.

[0014] As an optional scheme of the high-pressure gas well valve seat compensation sealing device, the bottom of the check ring is integrally connected with annular inlaid strips, the inlaid strips are arc-shaped strips, and the central angles between the end parts of adjacent inlaid strips are not more than 60°.

[0015] As an optional scheme of the high-pressure gas well valve seat compensation sealing device, an installation slot one is formed on the upper part of the compensation gasket, an installation slot two is formed on the bottom of the sealing ring, the installation slot one and the installation slot two are communicated to form an inlaid slot, and the inlaid strips are one-to-one inserted and matched with the inlaid slot.

[0016] As an optional scheme of the high-pressure gas well valve seat compensation sealing device, the upper part of the valve seat is formed in the annular groove, the inner bottom surface of the annular groove abuts against the bottom surface of the compensation gasket, and the inner wall of the annular groove abuts against the outer wall of the sealing ring and the check ring, respectively.

[0017] Compared with the prior art, the high-pressure gas well valve seat compensation sealing device has the following beneficial effects:

[0018] 1. The high-pressure gas well valve seat compensation sealing device is provided with the ladder-shaped compensation gasket and the sealing ring, and the check ring is used for trinity interlocking in the valve seat, so that the connection structure is stable, the sealing effect of the compensation gasket and the check ring is enhanced, the sealing ring is prevented from being distorted and deformed, and the gap on the contact surface is prevented from appearing, and the sealing effect is good.

[0019] 2. The high-pressure gas well valve seat compensation sealing device is provided with the scraping plate formed by the locking plate on the compensation gasket cooperating with the sealing ring, so that the impurities adsorbed on the outer wall of the valve core can be cleaned to some extent, and the sealing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an explosion structure schematic view of the utility model;

[0021] Figure 2 It is a front view structure schematic view of the utility model;

[0022] Figure 3The cross section structure schematic view of the utility model;

[0023] Figure 4 The cross section structure explosion schematic view of the utility model.

[0024] In the drawing: 1, valve seat; 2, sealing ring; 201, insertion slot; 202, mounting groove two; 3, baffle ring; 301, inlay strip; 4, annular groove; 401, clamping groove; 5, compensation gasket; 501, clamping strip; 502, mounting groove one; 6, locking plate; 601, scraper; 7, inlay groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] Please refer to Figures 1-4 The utility model provides a kind of technical solutions: a high-pressure gas well valve valve seat compensation sealing device, comprising: valve seat 1;Sealing ring 2, cross section is ladder-shaped and inlay in the annular groove 4 being set up on valve seat 1, and the bottom side of sealing ring 2 is equipped with the compensation gasket 5 for compensating the sealing effect of sealing ring 2;Compensation gasket 5 bottom is connected in the bottom surface of annular groove 4, and the locking plate 6 formed by the upper part of compensation gasket 5 protruding limits and locks sealing ring 2, and the top of locking plate 6 protrudes to the surface of sealing ring 2, forms scraper 601.

[0027] In the embodiment, the cross section of compensation gasket 5 is ladder-shaped, and the bottom surface is integrally connected with annularly distributed clamping strip 501, the clamping strip 501 is arc-shaped strip, and the central angle between the end portions of adjacent clamping strips 501 is not more than 20 °.

[0028] In the embodiment, the bottom surface of annular groove 4 is correspondingly provided with clamping groove 401 matched with clamping strip 501, and clamping strip 501 is one-to-one inserted into clamping groove 401, so that compensation gasket 5 can be quickly and stably positioned and limited to be installed into annular groove 4 of valve seat 1.

[0029] In the embodiment, the locking plate 6 is vertically arranged, the insertion slot 201 is formed in the sealing ring 2, the locking plate 6 protrudes through the insertion slot 201, and the side portion of the locking plate 6 sealingly abuts against the inner wall of the insertion slot 201, and the upper surface of the scraper 601 is parallel to the upper surface of the sealing ring 2.

[0030] That is, when the sealing ring 2 is installed into the annular groove 4 of the valve seat 1, the compensation washer 5 is positioned and limited by the locking plate 6. By the addition of the compensation washer 5, when the rotating valve core extrudes the sealing ring 2, the sealing ring 2 will transmit the extrusion force to the compensation washer 5, at this time, the compensation washer 5 will expand reversely while being extruded, and the compensation washer 5 will reversely lift the sealing ring 2 by the reverse expansion, and the greater the extrusion force of the valve core to the sealing ring 2, the greater the extrusion expansion of the compensation washer 5, that is, the tighter the fit of the sealing ring 2 and the valve core, and the better the sealing effect, so as to effectively prevent the wear of the sealing outside and the gap of the contact surface of the valve core caused by the erosion, and the sealing effect of the sealing ring 2 is invalid. The above compensation washer 5 has been disclosed in the prior art, and will not be described in detail.

[0031] Among them, the scraper 601 is slightly higher than the top side of the sealing ring 2, so that the scraper 601 can smoothly scrape the impurities on the outer wall of the valve core, and the structure of the locking plate 6 is applied to stably clamp the sealing ring 2 in the annular groove 4, so as to avoid the distortion of the sealing ring 2 caused by the friction force of the valve core during rotation, and the gap between the sealing ring 2 and the valve core, so that the sealing ring 2 has better effect. At the same time, the connection structure of the scraper 601 is stable and will not separate and fall off, and has strong usability.

[0032] In this embodiment, the outer wall of the sealing ring 2 is provided with a slidingly connected check ring 3, the check ring 3 is slidingly installed in the annular groove 4, and the bottom of the check ring 3 jointly locks the compensation washer 5 and the sealing ring 2.

[0033] Among them, the check ring 3 is integrally connected with annular inlay strips 301 at the bottom, the inlay strips 301 are arc strips, and the central angles between the ends of adjacent inlay strips 301 are not more than 60°.

[0034] Among them, the compensation washer 5 is provided with an installation groove one 502 at the upper part, the sealing ring 2 is provided with an installation groove two 202 at the bottom, the installation groove one 502 and the installation groove two 202 are communicated to form an inlay groove 7, and the inlay strips 301 are inserted and matched with the inlay groove 7 one by one, so that the check ring 3, the compensation washer 5 and the sealing ring 2 are locked and positioned mutually, and the connection structure is stable and not easy to distort.

[0035] In this embodiment, the annular groove 4 is provided at the upper part of the valve seat 1, the inner bottom surface of the annular groove 4 abuts against the bottom surface of the compensation washer 5, the inner wall of the annular groove 4 abuts against the outer wall of the sealing ring 2 and the check ring 3 respectively, and the sealing is installed.

[0036] When in use, the convex scraper 601 can scrape the outer wall of the valve core in contact with the sealing ring 2 during the extrusion of the sealing ring 2 by the valve core, and the impurities adsorbed on the outer wall of the valve core can be cleaned to a certain extent through the scraping of the scraper 601; at the same time, the sealing ring 2 is embedded into the sealing ring 2 under the extrusion of the valve core, so that the sealing ring 2 is in contact with the outer wall of the valve core, at this time the sealing ring 2 transmits the extrusion force to the compensation washer 5 when in contact with the valve core, and the higher the pressure on the compensation washer 5, the greater the extrusion expansion of the compensation washer 5, and in turn the sealing ring 2 is lifted, so that the sealing ring 2 is more tightly attached to the valve core, and the sealing effect is better, thereby effectively preventing the sealing effect from being invalid due to the rough surface of the sealing ring 2 caused by water flow washing; at the same time, the blocking ring 3 is locked by the inlay strip 301, that is, the sealing ring 2 is more stably clamped in the annular groove 4, so that the sealing ring 2 is prevented from being distorted by the friction force of the valve core during rotation, and the contact surface between the sealing ring 2 and the valve core is prevented from being cracked, thereby making the sealing ring 2 more effective.

[0037] It should be noted that the compensation washer 5, the sealing ring 2 and the blocking ring 3 are sequentially installed in the annular groove 4 of the valve seat 1, only the bottom surface of the annular groove 4 is slotted, the compensation washer 5, the sealing ring 2 and the blocking ring 3 are positioned, limited and locked, no slot is needed in the upper part of the valve seat 1, that is, there is no slot gap between the sealing ring 2, the blocking ring 3 and the valve seat 1, and the sealing effect is high. Moreover, the length of the clamping strip 501 and the inlay strip 301 is longer, and the main position is locked, and the short and small contact strip used in the prior art is not easy to break and fall off, and the strength is higher.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high pressure gas well valve seat compensating seal device, characterized by, include: Valve seat (1); The sealing ring (2) has a stepped cross-section and is embedded in the annular groove (4) opened on the valve seat (1). The bottom side of the sealing ring (2) is provided with a compensation gasket (5) to compensate for the sealing effect of the sealing ring (2). The bottom of the compensation washer (5) is engaged with the inner bottom surface of the annular groove (4), and the locking plate (6) formed by the upper part of the compensation washer (5) limits and locks the sealing ring (2), and the top of the locking plate (6) protrudes to the surface of the sealing ring (2) to form a scraper (601).

2. A valve seat compensating seal for a high pressure gas well valve as defined in claim 1, characterized in that: The compensation washer (5) has a stepped cross-section and an integrally connected ring-shaped strips (501) on its bottom surface. The strips (501) are arc-shaped and the central angle between the ends of adjacent strips (501) does not exceed 20°.

3. A valve seat compensating seal for a high pressure gas well valve as defined in claim 2, characterized in that: The bottom surface of the annular groove (4) is provided with corresponding slots (401) for the corresponding slots (501), and the slots (501) are inserted into the slots (401) one by one.

4. A valve seat compensating seal for a high pressure gas well valve as defined in claim 3, characterized in that: The locking plate (6) is arranged vertically, and a slot (201) is provided on the sealing ring (2). The locking plate (6) protrudes through the slot (201), and the side of the locking plate (6) seals against the inner wall of the slot (201). The upper surface of the scraper (601) is parallel to the upper surface of the sealing ring (2).

5. A high pressure gas well valve seat compensating seal as defined in claim 4, characterized in that: The outer wall of the sealing ring (2) is fitted with a sliding retaining ring (3), which is slidably installed in the annular groove (4), and the bottom of the retaining ring (3) locks the compensation washer (5) and the sealing ring (2).

6. A high pressure gas well valve seat compensating seal as defined in claim 5, characterized in that: The bottom of the retaining ring (3) is integrally connected with a ring-shaped inlay strip (301), the inlay strip (301) is an arc-shaped strip, and the central angle between the ends of adjacent inlay strips (301) does not exceed 60°.

7. A high pressure gas well valve seat compensating seal as defined in claim 6, characterized in that: The compensation washer (5) has an installation groove 1 (502) on its upper part, and the sealing ring (2) has an installation groove 2 (202) on its bottom. The installation groove 1 (502) and the installation groove 2 (202) are connected to form an inlay groove (7). The inlay strip (301) is inserted into the inlay groove (7) one by one.

8. A high pressure gas well valve seat compensating seal as defined in claim 7, characterized in that: The annular groove (4) has an upper part of the valve seat (1), the inner bottom surface of the annular groove (4) abuts against the bottom surface of the compensation washer (5), and the inner wall of the annular groove (4) abuts against the outer walls of the sealing ring (2) and the retaining ring (3) respectively.

Images