CN223854196U - A spring-loaded, fully sealed, dual-control plug valve - Google Patents

Abstract

The utility model belongs to the technical field of valves, and discloses a spring-pressurized full-sealed double-control plug valve which comprises a valve body, and an upper valve seat, a first plug valve, a first spring-pressurized valve seat, a second plug valve and a lower valve seat which are sequentially arranged in the valve body, wherein the upper valve seat and the first spring-pressurized valve seat are respectively matched with two sides of the first plug valve along the axial direction of the valve body, the first spring-pressurized valve seat and the second spring-pressurized valve seat are arranged at intervals, and the second spring-pressurized valve seat and the lower valve seat are respectively matched with two sides of the second plug valve along the axial direction of the valve body. According to the utility model, by arranging the first plug valve and the second plug valve, the two plug valves are integrally designed, so that a double-control mode is formed, the leakage risk is reduced, the overall structure is simplified, and the plug valve is safer and more compact due to the design, and is convenient to install and deploy.

Description

Spring-pressurized full-sealed double-control plug valve

Technical Field

The utility model belongs to the technical field of valves, and particularly relates to a spring-pressurized fully-sealed double-control plug valve.

Background

During drilling, the drilling fluid carries significant pressures that constantly impact the plug valve and its connection, which acts as a strong rear shield for the plug valve and must be able to withstand these high pressure impacts without deformation or leakage. Once the bearing capacity of the connection part does not reach the standard, the connection part is possibly damaged in a high-pressure environment, so that drilling fluid is leaked, and the normal operation of the plug valve is affected.

More importantly, the matching state between the ball and the valve seat of the plug valve also directly influences the tightness and the bearing capacity of the whole system. If the fit between the ball and the seat is poor, the seat is deformed or the gap between the two is too large, resulting in poor sealing. The poor fit not only reduces the sealing performance of the plug valve, so that drilling fluid is easier to leak from the gap between the valve ball and the valve seat, but also further aggravates the bearing pressure of the connecting part. Because drilling fluid can more easily penetrate into the valve body when the seal between the valve ball and the valve seat fails, additional impact and corrosion are caused to the connection part, thereby accelerating the damage process.

Such a double seal failure, i.e. a leak at the connection site combined with a poor fit between the valve ball and the valve seat, will directly result in an interruption of the drilling operation. The constant leakage of drilling fluid rapidly depletes the pressure balance within the wellbore, making well control exceptionally difficult. Meanwhile, the plug valve cannot be normally closed or opened, so that the drilling operation is forced to stop, the drilling efficiency is reduced, and huge economic loss is caused. Even more serious, if such a double seal failure is not found and handled in time, it may cause more serious safety accidents such as out of control of the blowout, equipment damage and even casualties.

Disclosure of utility model

The utility model provides a spring-pressurized full-sealed double-control plug valve, which comprises a valve body, and an upper valve seat, a first plug valve, a first spring-pressurized valve seat, a second plug valve and a lower valve seat which are sequentially arranged in the valve body, wherein the upper valve seat and the first spring-pressurized valve seat are respectively matched with two sides of the first plug valve along the axial direction of the valve body, the first spring-pressurized valve seat and the second spring-pressurized valve seat are arranged at intervals, and the second spring-pressurized valve seat and the lower valve seat are respectively matched with two sides of the second plug valve along the axial direction of the valve body.

Further, the first plug valve comprises a first valve core and a first valve core opening and closing switch, the first valve core opening and closing switch is arranged at the end part of the first valve core, and the first valve core opening and closing switch is movably connected with the first valve core.

Further, the second plug valve comprises a second valve core and a second valve core opening and closing switch, the second valve core opening and closing switch is arranged at the end part of the second valve core, and the second valve core opening and closing switch is movably connected with the second valve core.

Further, the first valve core opening and closing switch comprises a first cross slide block, a first operating handle and a first handle sleeve, wherein the first cross slide block is matched with a cross groove at the end part of the first valve core, the first operating handle is connected with the first cross slide block, and the first handle sleeve is sleeved outside the first operating handle.

Further, the second valve core opening and closing switch comprises a second cross sliding block, a second handle sleeve and a second operating handle, the second cross sliding block is matched with the cross groove at the end part of the second valve core, the second operating handle is connected with the second cross sliding block, and the second handle sleeve is sleeved outside the second operating handle.

Further, the first spring pressing valve seat comprises a first spring and a first valve seat, and the first spring is sleeved in a lower end groove on the first valve seat.

Further, the second spring pressurization valve seat comprises a second spring and a second valve seat, the second spring is sleeved in a lower end groove on the second valve seat, one end of the second spring is in contact with the bottom of the lower end groove of the second valve seat, and the other end of the second spring is in contact with the inner wall of the valve body. .

Further, the novel handle comprises a first O-shaped sealing ring, wherein the first O-shaped sealing ring is arranged in a groove on the outer wall of the first operation handle, and a seal is formed between the outer wall of the first O-shaped sealing ring and the inner wall of the first handle sleeve.

Further, still include a T-shaped sealing ring, a T-shaped sealing ring is located the lower extreme of a O-shaped sealing ring, a T-shaped sealing ring sets up in the recess of first operating handle outer wall, form sealedly between the outer wall of a T-shaped sealing ring and the first handle cover inner wall.

Further, the novel handle sleeve further comprises second O-shaped sealing rings, the two second O-shaped sealing rings are arranged in the grooves of the outer wall of the first handle sleeve at intervals, and sealing is formed between the outer walls of the two second O-shaped sealing rings and the inner wall of the valve body respectively.

Compared with the prior art, the application has the beneficial effects that:

According to the application, by arranging the first plug valve and the second plug valve, the two plug valves are integrally designed, so that a double-control mode is formed, the leakage risk is reduced, the overall structure is simplified, and the plug valve is safer and more compact due to the design, and is convenient to install and deploy.

According to the application, the first spring pressurization valve seat and the second spring pressurization valve seat are arranged, so that the elastic potential energy of the springs is utilized, the valve seat and the valve core are tightly attached, and a stable sealing effect can be maintained even under extreme working conditions, such as high-pressure, high-temperature or corrosive medium environments; the design of the first spring pressurization valve seat and the second spring pressurization valve seat avoids the direct contact between the valve core and the valve body, is beneficial to prolonging the service life of the valve core and improves the durability of equipment.

According to the application, the sealing reliability of the plug valve is further enhanced by arranging the first T-shaped sealing ring with the unique structural design and excellent sealing performance, and the T-shaped sealing ring shows more outstanding durability and leakage resistance in high-pressure, high-temperature or corrosive medium environments.

According to the application, through arranging the first spring pressurization valve seat, the second spring pressurization valve seat, the first T-shaped sealing ring and the like, the shutdown maintenance frequency caused by medium leakage is reduced, the maintenance cost and the risk of production interruption are reduced, and the usability and the production efficiency of the equipment are improved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic diagram of a spring-loaded fully-sealed double-control plug valve in an embodiment of the utility model;

FIG. 2 shows a schematic diagram of a first plug valve in an embodiment of the utility model;

FIG. 3 shows a schematic diagram of a second plug valve in an embodiment of the utility model;

FIG. 4 shows a schematic view of a first valve seat in an embodiment of the present utility model;

fig. 5 shows a top view of a first valve seat in an embodiment of the present utility model.

In the figure, 1, a valve body, 2, an upper valve seat, 3, a first plug valve, 31, a first valve core, 32, a first valve core opening and closing switch, 321, a first cross slide block, 322, a first operating handle, 323, a first handle sleeve, 4, a first spring pressurizing valve seat, 41, a first spring, 42, a first valve seat, 5, a second spring pressurizing valve seat, 51, a second spring, 52, a second valve seat, 6, a second plug valve, 61, a second valve core, 62, a second valve core opening and closing switch, 621, a second cross slide block, 622, a second operating handle, 623, a second handle sleeve, 7, a lower valve seat, 8, a first O-shaped sealing ring, 9, a first T-shaped sealing ring and 10, a second O-shaped sealing ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the spring-pressurized full-sealed double-control plug valve comprises a valve body 1, and an upper valve seat 2, a first plug valve 3, a first spring-pressurized valve seat 4, a second spring-pressurized valve seat 5, a second plug valve 6 and a lower valve seat 7 which are sequentially arranged in the valve body 1, wherein the upper valve seat 2 and the first spring-pressurized valve seat 4 are respectively matched with two sides of the first plug valve 3 along the axial direction of the valve body 1, the first spring-pressurized valve seat 4 and the second spring-pressurized valve seat 5 are arranged at intervals, and the second spring-pressurized valve seat 5 and the lower valve seat 7 are respectively matched with two sides of the second plug valve 6 along the axial direction of the valve body 1.

The valve body 1 is columnar, the first plug valve 3 and the second plug valve 6 are arranged on the valve body 1, and the two plug valves are integrally designed, so that a double-control mode is formed, double control is ensured on one hand, and on the other hand, if one of the two plug valves is damaged or leaked, the other one can be replaced in time, so that the leakage risk is reduced, the integral structure is simplified, the use of connecting pieces is reduced, leakage is prevented due to the integral design, and the plug valves are safer and more compact and are convenient to install and deploy.

As shown in fig. 2, the first plug valve 3 includes a first valve core 31 and a first valve core on-off switch 32, where the first valve core on-off switch 32 is disposed at an end of the first valve core 31, and the first valve core on-off switch 32 is movably connected with the first valve core 31.

The first valve core 31 is internally provided with a channel communicated with the valve body 1, when the channel in the first valve core 31 rotates to be communicated with the inner cavity of the valve body 1, the whole valve body 1 is opened, and when the channel in the first valve core 31 rotates to be not communicated with the inner cavity of the valve body 1, the whole valve body 1 is closed.

The first valve core on-off switch 32 comprises a first cross slide 321, a first handle sleeve 323 and a first operating handle 322, the first cross slide 321 is matched with a cross groove at the end part of the first valve core 31, the first operating handle 322 is connected with the first cross slide 321, and the first handle sleeve 323 is sleeved outside the first operating handle 322.

The first cross slide 321 is matched with a cross groove at the top of the first valve core 31, the first operating handle 322 is connected with the first cross slide 321, and the first cross slide 321 drives the first valve core 31 to rotate by rotating the first operating handle 322 so as to control the opening and closing.

As shown in fig. 3, the second plug valve 6 includes a second valve core 61 and a second valve core on-off switch 62, the second valve core on-off switch 62 is disposed at an end portion of the second valve core 61, and the second valve core on-off switch 62 is movably connected with the second valve core 61.

The second valve core 61 is internally provided with a channel communicated with the valve body 1, when the channel in the second valve core 61 rotates to be communicated with the inner cavity of the valve body 1, the whole valve body 1 is opened, and when the channel in the second valve core 61 rotates to be not communicated with the inner cavity of the valve body 1, the whole valve body 1 is closed.

The second valve core on-off switch 62 includes a second cross slide 621, a second handle sleeve 623, and a second operation handle 622, where the second cross slide 621 is matched with the cross groove at the end of the second valve core 61, the second operation handle 622 is connected with the second cross slide 621, and the second handle sleeve 623 is sleeved outside the second operation handle 622.

The second operating handle 622 is connected with the second valve core 61 by matching the second cross sliding block 621 with the cross groove at the top of the second valve core 61, and the second valve core 61 is driven to rotate by rotating the second operating handle 622 to control opening and closing by rotating the second operating handle 622.

As shown in fig. 4, the first spring pressing valve seat 4 includes a first spring 41 and a first valve seat 42, and the first spring 41 is sleeved in a lower end groove on the first valve seat 42.

As shown in fig. 5, the first spring 41 is disposed around the groove at the lower end of the first valve seat 42, and the first spring 41 uses its elastic potential energy to respectively abut against the groove at the lower end of the first valve seat 42 and the inner wall of the valve body 1, so that the first valve seat 42 is tightly attached to the first valve core 31, and leakage of drilling fluid from the periphery of the first valve core 31 is prevented.

The second spring pressurization valve seat 5 comprises a second spring 51 and a second valve seat 52, and the second spring 51 is sleeved in a lower end groove on the second valve seat 52.

The second spring 51 is arranged in the groove at the lower end of the second valve seat 52 in a surrounding mode, the second spring 51 respectively abuts against the groove at the lower end of the second valve seat 52 and the inner wall of the valve body 1 by utilizing self elastic potential energy, so that the second valve seat 52 is tightly attached to the second valve core 61, and drilling fluid is prevented from leaking from the periphery of the second valve core 61.

When the plug valve is in the closed state, the first spring 41 and the second spring 51 apply continuous and uniform pressure to the first valve core 31 and the second valve core 61 through the elastic force thereof, ensuring that tight and uniform contact can be formed between the first valve core 31 and the second valve core 61 and the valve seat, thereby effectively preventing leakage of the medium. The design not only improves the sealing performance of the plug valve, but also obviously enhances the adaptability of the plug valve to medium pressure and temperature changes. When the medium pressure fluctuates or the temperature changes, the first spring 41 and the second spring 51 can quickly absorb and disperse these stresses, maintain stable contact between the first valve element 31, the second valve element 61, and the valve seat, and ensure durability of the sealing effect.

In addition, the design of the first valve seat 42 with the first spring 41 inside brings about another significant advantage that it makes the first plug valve 3 smoother during opening and closing, reducing the risk of failure due to friction and wear. The novel design not only improves the service life of the first plug valve 3, but also reduces the maintenance cost and the use difficulty.

On the basis of the manufacturing materials of the first valve core 31 and the second valve core 61, a dual-phase alloy with excellent performance is selected as the manufacturing material, and the dual-phase alloy has excellent mechanical performance and corrosion resistance, so that the deformation of the first valve core 31 and the second valve core 61 is ensured to be smaller when bearing pressure, and the dual-phase alloy is always in an elastic deformation zone. Meanwhile, the surface layer materials of the first valve core 31 and the second valve core 61 also have higher hardness and self-lubricity, further improving durability and sealing performance.

The spring-pressurized full-sealed double-control plug valve further comprises a first O-shaped sealing ring 8, wherein the first O-shaped sealing ring 8 is arranged in a groove on the outer wall of the first operating handle 322, and the first O-shaped sealing ring 8 abuts against the inner wall of the first handle sleeve 323.

The spring-pressurized full-sealed double-control plug valve further comprises a first T-shaped sealing ring 9, wherein the first T-shaped sealing ring 9 is located at the lower end of the first O-shaped sealing ring 8, the first T-shaped sealing ring 9 is arranged in a groove on the outer wall of the first operating handle 322, and the first T-shaped sealing ring 9 abuts against the inner wall of the first handle sleeve 323.

A first O-ring 8 and a first T-ring 9 are respectively disposed between the first handle cover 323 and the first operating handle 322 to form two seals, wherein the proximal valve core end adopts the first T-ring 9, and the distal valve core end adopts the first O-ring 8. The design of the multi-channel sealing ring not only remarkably improves the sealing performance and can bear higher working pressure, effectively avoids the failure problem caused by thorn leakage at the operating handle, but also enhances the stability and safety of the equipment.

The design idea is that multiple protection is formed by increasing the number and types of the sealing rings, so that good sealing effect can be ensured under various working conditions. Meanwhile, the combination of the first T-shaped sealing ring 9 and the first O-shaped sealing ring 8 ensures the sealing reliability, is convenient to install and maintain, reduces the maintenance cost and improves the overall performance of the equipment.

The sealing design of the traditional plug valve operating handle is single, and a single O-shaped sealing ring is usually adopted, so that the sealing performance is often insufficient when the design faces high-pressure working conditions, the operating handle is easy to puncture and leak, and the normal operation and the safety of equipment are affected. In addition, once the seal fails, the replacement and maintenance difficulties are greater, increasing the maintenance costs.

The spring-pressurized full-sealed double-control plug valve further comprises second O-shaped sealing rings 10, wherein the two second O-shaped sealing rings 10 are arranged in grooves on the outer wall of the first handle sleeve 323 at intervals, and the two second O-shaped sealing rings 10 respectively abut against the inner wall of the valve body 1.

All the first O-shaped sealing rings 8, the second O-shaped sealing rings 10 and the first T-shaped sealing rings 9 are made of nitrile rubber materials, corresponding check rings are arranged on the first O-shaped sealing rings 8, the second O-shaped sealing rings 10 and the first T-shaped sealing rings 9, and polyurethane materials are selected for manufacturing the check rings. The design and the material application can not only resist high-grade pressure, but also effectively avoid the failure problem caused by the puncture leakage at the operating handle, thereby greatly improving the safety and reliability of well control.

The spring-pressurized full-sealed double-control plug valve further comprises a third O-shaped sealing ring, wherein the third O-shaped sealing ring is arranged in a groove on the outer wall of the second operation handle 622, and the third O-shaped sealing ring abuts against the inner wall of the second handle sleeve 623.

The spring-pressurized full-sealed double-control plug valve further comprises a second T-shaped sealing ring, wherein the second T-shaped sealing ring is located at the lower end of the third O-shaped sealing ring, the second T-shaped sealing ring is arranged in a groove on the outer wall of the second operation handle 622, and the second T-shaped sealing ring abuts against the inner wall of the second handle sleeve 623.

The spring-pressurized full-sealed double-control plug valve further comprises fourth O-shaped sealing rings, wherein two fourth O-shaped sealing rings are arranged in grooves on the outer wall of the second handle sleeve 623 at intervals, and the two fourth O-shaped sealing rings respectively abut against the inner wall of the valve body 1.

The two ends of the upper valve seat 2 are respectively provided with a first split retaining ring and a second split retaining ring, the first split retaining ring is arranged on one side close to the first valve core 31 and is used for fixedly connecting the upper valve seat 2 with the valve body 1, the upper valve seat 2 can be limited on the other hand to realize the sealing with the first valve core 31, the first supporting ring is arranged in the second split retaining ring and is in contact with the inner wall of the second split inner ring, the first spiral double-layer retaining ring is arranged close to the first supporting ring and is arranged on one side far away from the first valve core 31, the two ends of the lower valve seat 7 are respectively provided with a third split retaining ring and a fourth split retaining ring, the third split retaining ring is arranged on one side close to the second valve core 61 and is used for fixedly connecting the lower valve seat 7 with the valve body 1, the second supporting ring is arranged in the inner wall of the fourth split retaining ring and is in contact with the inner wall of the fourth split inner ring, the second double-layer supporting ring is arranged close to the second spiral double-layer retaining ring and is arranged close to the second side far away from the second spiral retaining ring 61.

In addition, in order to further improve the performance of key components of the plug valve, a dual-phase alloy material with a special structure, such as a hard metal material of tungsten-chromium alloy or tungsten-manganese alloy, is selected to provide necessary hardness for the valve core, the upper valve seat 2 and the lower valve seat 7. The selection of the two-phase alloy materials is closely related to the pressure resistance of the plug valve, so that the plug valve can still maintain excellent performance under a high-pressure environment. The application adopts a Plasma Enhanced Chemical Vapor Deposition (PECVD) process in a physical Vapor Deposition (Physical Vapor Deposition, PVD) technology to process the valve core, the upper valve seat 2 and the lower valve seat 7.

Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications may be made to the technical solutions described in the foregoing embodiments or equivalents may be substituted for some of the technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model in essence of the corresponding technical solutions.

Claims (10)

1. The spring-pressurized full-sealed double-control plug valve is characterized by comprising a valve body (1), and an upper valve seat (2), a first plug valve (3), a first spring-pressurized valve seat (4), a second spring-pressurized valve seat (5), a second plug valve (6) and a lower valve seat (7) which are sequentially arranged in the valve body (1), wherein the upper valve seat (2) and the first spring-pressurized valve seat (4) are respectively matched with two sides of the first plug valve (3) along the axial direction of the valve body (1), the first spring-pressurized valve seat (4) and the second spring-pressurized valve seat (5) are arranged at intervals, and the second spring-pressurized valve seat (5) and the lower valve seat (7) are respectively matched with two sides of the second plug valve (6) along the axial direction of the valve body (1).

2. The spring-loaded fully-sealed double-control plug valve of claim 1, wherein the first plug valve (3) comprises a first valve core (31) and a first valve core opening and closing switch (32), the first valve core opening and closing switch (32) is arranged at the end part of the first valve core (31), and the first valve core opening and closing switch (32) is movably connected with the first valve core (31).

3. The spring-loaded fully-sealed double-control plug valve according to claim 1, wherein the second plug valve (6) comprises a second valve core (61) and a second valve core opening and closing switch (62), the second valve core opening and closing switch (62) is arranged at the end part of the second valve core (61), and the second valve core opening and closing switch (62) is movably connected with the second valve core (61).

4. The spring-loaded fully-sealed double-control plug valve of claim 2, wherein the first valve core opening and closing switch (32) comprises a first cross slide block (321), a first operating handle (322) and a first handle sleeve (323), the first cross slide block (321) is matched with a cross groove at the end part of the first valve core (31), the first operating handle (322) is connected with the first cross slide block (321), and the first handle sleeve (323) is sleeved outside the first operating handle (322).

5. The spring-loaded fully-sealed double-control plug valve according to claim 3, wherein the second valve core opening and closing switch (62) comprises a second cross-shaped sliding block (621), a second handle sleeve (623) and a second operating handle (622), the second cross-shaped sliding block (621) is matched with a cross-shaped groove at the end part of the second valve core (61), the second operating handle (622) is connected with the second cross-shaped sliding block (621), and the second handle sleeve (623) is sleeved outside the second operating handle (622).

6. The spring-loaded fully-sealed double-control plug valve of claim 1, wherein the first spring-loaded valve seat (4) comprises a first spring (41) and a first valve seat (42), and the first spring (41) is sleeved in a lower end groove of the first valve seat (42).

7. The spring-pressurized fully-sealed double-control plug valve according to claim 1, wherein the second spring-pressurized valve seat (5) comprises a second spring (51) and a second valve seat (52), the second spring (51) is sleeved in a lower end groove of the second valve seat (52), one end of the second spring (51) is in contact with the bottom of the lower end groove of the second valve seat (52), and the other end of the second spring (51) is in contact with the inner wall of the valve body (1).

8. The spring-loaded fully sealed double control plug valve of claim 4, further comprising a first O-ring (8), wherein said first O-ring (8) is disposed in a groove in an outer wall of said first operating handle (322), and a seal is formed between an outer wall of said first O-ring (8) and an inner wall of said first handle sleeve (323).

9. The spring-loaded fully-sealed double control plug valve of claim 8, further comprising a first T-shaped sealing ring (9), wherein the first T-shaped sealing ring (9) is located at the lower end of the first O-shaped sealing ring (8), the first T-shaped sealing ring (9) is arranged in a groove on the outer wall of the first operating handle (322), and a seal is formed between the outer wall of the first T-shaped sealing ring (9) and the inner wall of the first handle sleeve (323).

10. The spring-loaded fully-sealed double-control plug valve of claim 4, further comprising second O-shaped sealing rings (10), wherein the two second O-shaped sealing rings (10) are arranged in grooves on the outer wall of the first handle sleeve (323) at intervals, and the outer walls of the two second O-shaped sealing rings (10) are respectively sealed with the inner wall of the valve body (1).