A cock valve with pressure opening

Abstract

The present application relates to a kind of cock valve field, especially a kind of cock valve with pressure opening, to solve the technical problem that when the cock valve ball two ends exist larger pressure difference, ball and ball seat and operating key and the great friction between body are generated, it is difficult to open the cock valve using conventional operation, including: body, operating key, displacement track, pressure relief track, pressure relief valve, upper ball seat, pressure relief hole, lower ball seat, spring, ball valve, core hole, right angle block, cross slider coupling, when the lower part of cock valve has pressure, operating key is rotated from " close " to " discharge " position, ball valve does not move at this time, operating key is significantly reduced by lower surface track and is pulled out pressure relief valve, lower liquid enters pressure relief hole and is discharged into upper portion, after the pressure difference of two ends pressure difference disappears, operating key is rotated to " open " at this time, right angle block drives cross slider coupling to rotate, realizes pressure opening.

Description

Technical Field

[0001] This invention relates to the field of plug valves, and more particularly to a plug valve that opens under pressure. Background Technology

[0002] The angular drill pipe plug valve is a manual control valve in the drill string circulation system and is one of the effective tools for preventing blowouts and well kicks. Angular drill pipe plug valves are divided into upper and lower angular drill pipe plug valves. The upper angular drill pipe plug valve connects to the lower end of the swivel and the upper end of the angular drill; the lower angular drill pipe plug valve connects to the lower end of the angular drill and the upper end of the drill pipe or the upper end of the angular drill pipe protective joint. Operating the angular drill pipe plug valve is very simple; simply turn it according to the instructions using a special wrench to open or close it.

[0003] When there is a large pressure difference between the two ends of the ball in the plug valve, a large frictional force is generated between the ball and the ball seat, and between the operating key and the body. It is difficult to open the plug valve using conventional operation. This invention solves the problem of opening the plug valve under pressure. Summary of the Invention

[0004] In order to solve the technical problem that when there is a large pressure difference between the two ends of the ball in a plug valve, the ball seat and the operating key and the body will generate a large frictional force, making it difficult to open the plug valve using conventional operation, the present invention provides a plug valve that opens under pressure.

[0005] A pressurized plug valve includes: a body, an operating key rotatably connected to the wall of the body, a track on the lower surface of the operating key, the track including a displacement track and a pressure relief track, a pressure relief valve slidably connected within the track, the pressure relief valve slidably connected within the pressure relief hole of an upper ball seat, the upper ball seat being sealed and embedded in the inner wall of the body, a lower ball seat being connected to the inner wall of the body via a spring, a gap being left between the lower ball seat and the inner wall of the body, the spring being in a compressed state, a ball valve being sealed between the upper and lower ball seats, a core hole on the lower surface of the operating key, two circumferentially distributed right-angled blocks connected within the core hole, a boss of a cross-slider coupling located within the core hole, and a boss of the ball valve located within the groove of the cross-slider coupling.

[0006] Furthermore, the spring is a wave spring.

[0007] Furthermore, a Y-shaped sealing ring is provided in the gap between the lower ball seat and the inner wall of the body, with the opening of the Y-shaped sealing ring facing upward.

[0008] Furthermore, the upper ball seat end contacts the open support sleeve, the open support sleeve is embedded in the inner wall of the body, a support sleeve is connected inside the open support sleeve, and a hole elastic spring is embedded in the inner wall of the open support sleeve, the inner surface of the hole elastic spring is in contact with the support sleeve.

[0009] Furthermore, the ball valve has a balance hole inside the boss that communicates with the inside of the ball valve.

[0010] Furthermore, the pressure relief valve includes a pressure relief valve control head, which is slidably connected to the track. A valve core is hinged inside the pressure relief valve control head and slidably connected to the pressure relief hole. The valve core is provided with a liquid guide groove. When the valve core is fully inserted into the pressure relief hole, the pressure relief hole is sealed.

[0011] Furthermore, the liquid guiding groove is provided with three grooves, which are evenly distributed around the outer wall of the valve core.

[0012] Furthermore, the valve core is connected to a tapered sealing ring at its first end, and the pressure relief hole inlet end is provided with a tapered chamfer.

[0013] Furthermore, the valve core and the pressure relief hole are hardened.

[0014] Beneficial effects of this invention:

[0015] 1. When there is pressure at the bottom of the plug valve, rotate the operating key from "close" to "release". The cross slider coupling rotates in the core hole. At this time, the ball valve does not move. The rotation torque of the operating key is significantly reduced. The operating key pulls out the pressure relief valve through the lower surface track. The pressure relief hole is no longer sealed. The liquid in the lower part enters the pressure relief hole and is discharged into the upper part. After the pressure difference between the two ends disappears, rotate the operating key to "open". The right-angle block drives the cross slider coupling to rotate. In this way, the continuous rotational motion is converted into intermittent rotational motion, realizing pressurized opening.

[0016] 2. One-way sealing is achieved through a Y-type sealing ring, which takes into account both the flow of pressure-relief liquid and sealing;

[0017] 3. The pressure relief valve control head and pressure relief valve core are connected by a hinge, which smoothly converts rotary motion into linear motion;

[0018] 4. The pressure relief valve has three evenly distributed liquid guide grooves at the end of the valve core to achieve the functions of guiding and diverting. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the operation key 2 of the present invention;

[0021] Figure 3 This is the present invention. Figure 1 Magnified structural diagram A;

[0022] Figure 4 This is a schematic diagram of the cross-slider coupling structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the pressure relief valve structure of the present invention.

[0024] Figure 6This is a schematic diagram of the open, venting, and closed states of the plug valve of the present invention. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the open, venting, and closed states of the plug valve of the present invention. Figure 2 .

[0026] In the diagram: 1. Body; 2. Operation key; 3. Displacement track; 4. Pressure relief track; 5. Pressure relief valve; 6. Upper ball seat; 7. Pressure relief hole; 8. Lower ball seat; 9. Spring; 10. Ball valve; 11. Core hole; 12. Right angle block; 13. Cross slider coupling; 14. Y-type sealing ring; 15. Opening support sleeve; 16. Support sleeve; 17. Hole elastic snap ring; 18. Balance hole; 5. Pressure relief valve; 51. Pressure relief valve control head; 52. Valve core; 53. Liquid guide groove; 54. Conical sealing ring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The present invention will now be described in detail with reference to the accompanying drawings.

[0029] Example 1:

[0030] The following is in conjunction with the appendix Figure 1-7 This embodiment describes a pressurized plug valve, comprising: a body 1, an operation key 2 rotatably connected to the wall of the body 1, a track on the lower surface of the operation key 2, the track including a displacement track 3 and a pressure relief track 4, a pressure relief valve 5 slidably connected within the track, the pressure relief valve 5 slidably connected within the pressure relief hole 7 of the upper ball seat 6, the upper ball seat 6 being sealed and embedded in the inner wall of the body 1, a lower ball seat 8 being connected to the inner wall of the body 1 via a spring 9, a gap being left between the lower ball seat 8 and the inner wall of the body 1, the spring 9 being in a compressed state, a ball valve 10 being sealed between the upper ball seat 6 and the lower ball seat 8, a core hole 11 on the lower surface of the operation key 2, two circumferentially distributed right-angled blocks 12 connected within the core hole 11, a boss of a cross-slider coupling 13 located within the core hole 11, and a boss of the ball valve 10 located within the groove of the cross-slider coupling 13;

[0031] When there is pressure at the bottom of the stopcock valve, rotate the operating key 2 from the "closed" position to the "release" position. The rotation of the core hole 11 inside the operating key 2 will not move the boss of the cross slider coupling 13. At this time, the ball valve 10 does not move, and the rotation torque of the operating key 2 is significantly reduced. The operating key 2 can also be pulled out of the pressure relief valve 5 from the pressure relief hole 7 more easily through the displacement rail 3. The liquid in the lower part of the lower ball seat 8 enters the lower cavity of the operating key 2 through the gap between the lower ball seat 8 and the body 1, and then enters the pressure relief hole 7 of the upper ball seat 6 which is not sealed by the pressure relief valve 5. After entering the upper part of the upper ball seat 6, the pressure difference between the lower part of the lower ball seat 8 and the upper part of the upper ball seat 6 disappears. At this time, rotate the operating key 2 to the "open" position. The right-angle block 12 drives the boss of the cross slider coupling 13 to rotate. The groove of the cross slider coupling 13 drives the ball valve 10 to rotate. The pressure relief rail 4 drives the pressure relief valve 5 to maintain the pressure relief state. In this way, the continuous rotational motion is converted into intermittent rotational motion, realizing the opening under pressure.

[0032] Spring 9 is a wave spring;

[0033] Wave springs can provide ideal elasticity within a small installation space and are suitable for supporting the lower ball seat 8.

[0034] A Y-shaped sealing ring 14 is provided in the gap between the lower ball seat 8 and the inner wall of the body 1, with the opening of the Y-shaped sealing ring 14 facing upward;

[0035] Liquid can pass through the gap between the lower ball seat 8 and the inner wall of the body 1 and through the Y-shaped sealing ring 14 without backflow, thus balancing the flow of pressure-relief liquid and sealing.

[0036] The upper ball seat 6 end contacts the open support sleeve 15, the open support sleeve 15 is embedded in the inner wall of the body 1, the open support sleeve 15 is connected to the support sleeve 16, the inner wall of the open support sleeve 15 is embedded with a hole elastic snap spring 17, and the inner surface of the hole elastic snap spring 17 contacts the support sleeve 16.

[0037] This makes the upper ball seat 6 more reliably fixed.

[0038] The boss of the ball valve 10 is provided with a balance hole 18 that is connected to the inside of the ball valve 10;

[0039] The balance hole 18 can assist in pressure relief.

[0040] The pressure relief valve 5 includes a pressure relief valve control head 51, which is slidably connected to the track. A valve core 52 is hinged inside the pressure relief valve control head 51. The valve core 52 is slidably connected to the pressure relief hole 7. A liquid guide groove 53 is provided on the valve core 52. When the valve core 52 is fully inserted into the pressure relief hole 7, the pressure relief hole 7 is sealed.

[0041] When the pressure relief valve control head 51 slides within the displacement track 3, the hinged connection allows for a smoother conversion of rotational motion into linear motion.

[0042] The liquid guiding groove 53 is provided with three grooves, which are evenly distributed around the circumference of the outer wall of the valve core 52;

[0043] The liquid guiding tank 53 can realize the functions of guiding and guiding flow.

[0044] The valve core 52 is connected to a conical sealing ring 54 at its head end, and the pressure relief hole 7 has a conical chamfer at its inlet end;

[0045] It adopts a dual-seal structure of sealing ring and conical self-sealing, which provides better sealing effect.

[0046] The valve core 52 and the pressure relief hole 7 are hardened.

[0047] This makes the valve core 52 and the pressure relief hole 7 more wear-resistant and extends their service life.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressurized plug valve, characterized in that: include: The main body (1) has an operating key (2) rotatably connected to its pipe wall. The lower surface of the operating key (2) is provided with a track, which includes a displacement track (3) and a pressure relief track (4). A pressure relief valve (5) is slidably connected inside the track. The pressure relief valve (5) is slidably connected to the pressure relief hole (7) of the upper ball seat (6). The upper ball seat (6) is sealed and embedded in the inner wall of the main body (1). The lower ball seat (8) is connected to the inner wall of the main body (1) through a spring (9). There is a gap between the lower ball seat (8) and the inner wall of the main body (1). The spring (9) is in a compressed state. A ball valve (10) is sealed between the upper ball seat (6) and the lower ball seat (8). The lower surface of the operating key (2) is provided with a track. The surface is provided with a core hole (11), and two circumferentially distributed right-angled blocks (12) are connected in the core hole (11). The boss of the cross slider coupling (13) is located in the core hole (11), and the boss of the ball valve (10) is located in the groove of the cross slider coupling (13). The pressure relief valve (5) includes a pressure relief valve control head (51), which is slidably connected in the track. A valve core (52) is hinged in the pressure relief valve control head (51), which is slidably connected in the pressure relief hole (7). A liquid guide groove (53) is provided on the valve core (52). When the valve core (52) is fully inserted into the pressure relief hole (7), the pressure relief hole (7) is sealed.

2. A pressurized plug valve according to claim 1, characterized in that: The spring (9) is a wave spring.

3. A pressurized plug valve according to claim 1, characterized in that: A Y-shaped sealing ring (14) is provided in the gap between the lower ball seat (8) and the inner wall of the body (1), with the opening of the Y-shaped sealing ring (14) facing upward.

4. A pressurized plug valve according to claim 1, characterized in that: The upper ball seat (6) end is in contact with the open support sleeve (15), the open support sleeve (15) is embedded in the inner wall of the body (1), and a support sleeve (16) is connected inside the open support sleeve (15). A hole elastic snap ring (17) is embedded in the inner wall of the open support sleeve (15), and the inner surface of the hole elastic snap ring (17) is in contact with the support sleeve (16).

5. A pressurized plug valve according to claim 1, characterized in that: The ball valve (10) has a balance hole (18) inside its boss that is connected to the inside of the ball valve (10).

6. A pressurized plug valve according to claim 1, characterized in that: The liquid guiding groove (53) is provided in three sections, and the three liquid guiding grooves (53) are evenly distributed around the outer wall of the valve core (52).

7. A pressurized plug valve according to claim 1, characterized in that: The valve core (52) is connected to a conical sealing ring (54) at its head end, and the pressure relief hole (7) has a conical chamfer at its inlet end.

8. A pressurized plug valve according to claim 1, characterized in that: The valve core (52) and the pressure relief hole (7) are hardened.

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