One-way rotation closed pressure control valve

Abstract

The utility model relates to fluid control equipment technical field, concretely is a kind of one-way rotation closed pressure control valve, including valve body, still including the A interface and B interface being communicated with valve body respectively, A interface is communicated with valve body lower end, B interface is communicated with valve body side portion, valve body is provided with valve seat, and valve seat is opened with valve port, and valve port is provided with the valve core that can be blocked to it, valve core only allows fluid to flow from A interface to B interface direction, valve core can be moved up and down relative to valve body, while moving up and down in valve body, valve core can occur rotational movement. The utility model adopts the above structure, can be applicable to oilfield various application scenarios, and adopt the mode of rotation closed, avoid the impact when valve core closes valve port, to avoid the deformation caused by closing not tight.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, specifically a one-way rotary closed pressure control valve. Background Technology

[0002] In existing technology, oil wellheads in oilfields are equipped with corresponding one-way pressure control valves (check valves) due to operational requirements. According to safety production management regulations, check valves used in pipelines carrying high-temperature, high-pressure, and corrosive media must be of metal structure, meaning both the valve core and valve port are made of metal. Currently, most check valves close the valve port through a reciprocating axial motion, meaning the valve core impacts the valve port when it closes. Due to the high pressure inside the pipeline, to reduce the deformation caused by the valve core impacting the valve port when closing, key structures of check valves are made of high-hardness metal materials. However, high-hardness metal materials are not corrosion-resistant, so check valves will rust after a period of use, causing incomplete closure or even failure. Check valves used in pipelines carrying corrosive media have corrosion-resistant plastic gaskets installed at the valve ports, or soft seals are achieved using sealing rings. However, because these non-metallic materials are not resistant to high temperatures and are prone to aging, and are easily damaged in media containing sand and other contaminants, the service life of the gaskets or sealing rings is short, requiring frequent replacement.

[0003] To address the aforementioned issues, the applicant developed a corrosion-resistant, long-lasting rotary check valve with self-testing function in CN119532475B. In this patent, the applicant proposed a rotary-closing check valve structure, which can improve sealing performance and control accuracy.

[0004] However, oilfield applications are diverse, and in some specific scenarios, the aforementioned axial flow type one-way pressure control valve performs poorly or is inconvenient to install. Therefore, it is necessary to improve and develop a new one-way pressure control valve structure. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a one-way rotary closed pressure control valve.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A one-way rotary pressure control valve includes a valve body and an A port and a B port respectively connected to the valve body. The A port is connected to the lower end of the valve body, and the B port is connected to the side of the valve body. A valve seat is provided in the valve body, and a valve port is provided at the valve seat. A valve core is provided at the valve port, which can block it. The valve core only allows fluid to flow from the A port to the B port. The valve core can move up and down relative to the valve body. While moving up and down in the valve body, the valve core can also rotate.

[0008] This invention, employing the aforementioned structure, is applicable to various oilfield application scenarios. Furthermore, the rotary closure method prevents impact when the valve core closes the valve port, thus avoiding deformation and incomplete closure. When the single-flow valve is rotary-closed, for viscous media or media containing gravel, iron filings, or other turbid impurities, this invention utilizes its spiral rotation characteristic to vortex and push out impurities and media from the valve port in a Tai Chi-like manner, thereby closing the valve port and preventing leakage.

[0009] Specifically, the valve core is equipped with a pin, and the valve body is correspondingly provided with a spiral groove, or the valve core is equipped with a spiral groove, and the valve body is correspondingly installed with a pin; the pin can slide in conjunction with the spiral groove.

[0010] Furthermore, the rotational closure method can be implemented using the following three structural forms:

[0011] First, a sliding shaft is fixedly connected to the top of the valve core, and the sliding shaft is coaxially arranged with the valve core. A bushing is fixedly arranged on the inner wall of the valve body, and the sliding shaft is movably arranged inside the bushing. A pin is fixedly connected to the inner side of the bushing. A spiral groove is opened on the outer surface of the sliding shaft, and the spiral groove is spirally arranged along the center line of the sliding shaft. The pin is movably arranged in the spiral groove.

[0012] Secondly, a sliding shaft is fixedly connected to the top of the valve core. The sliding shaft is coaxial with the valve core. A guide groove is provided at the center of the top of the sliding shaft. A spiral groove is provided on the inner wall of the guide groove. The spiral groove is spirally arranged along the center line of the sliding shaft. A positioning post is fixedly connected to the top of the inner side of the valve body. A pin is fixedly connected to the outer surface of the positioning post. The positioning post is slidably arranged inside the guide groove, and the pin is movably arranged inside the spiral groove.

[0013] Third, the inner wall of the valve body is provided with a spiral groove, which is spirally arranged along the center line of the valve body. The valve core is slidably arranged inside the valve body, and a pin is fixedly connected to the side of the valve core. The pin is movably arranged in the spiral groove.

[0014] A corrosion-resistant cap is fixedly connected to the bottom of the valve core. The diameter of the corrosion-resistant cap is smaller than the minimum diameter of the valve orifice. The corrosion-resistant cap can prevent fluid from directly eroding the valve core and can also divert the flow.

[0015] The contact surface between the valve port and the valve core is an inclined conical structure. The valve core gradually closes the valve port through a rotational break-in process, so each closure of the valve port is a self-repairing process of rotational grinding. The inner and outer conical structures and the rotational closing method are suitable for scenarios involving viscous media, gravel, and other mixed media. For example, the rotational closing method can rotate and push hard objects such as viscous crude oil and gravel away from the valve port to close it, or it can rotate and cut ropes or straw.

[0016] A status indicator is provided on the outer side of the top of the valve body. The status indicator includes an upper magnetic ring, a lower magnetic ring, a non-magnetic plate, a fixed post, and a sliding sleeve. The non-magnetic plate is fixedly connected to the top of the valve body. The fixed post is fixedly connected to the top of the non-magnetic plate. The sliding sleeve is movably sleeved on the outside of the fixed post. The sliding post is fixedly connected to the outside of the fixed post. A spiral slide is formed on the surface of the sliding sleeve. The sliding post slides in cooperation with the spiral slide. The lower part of the sliding sleeve is fixedly connected to the upper magnetic ring. The lower magnetic ring is fixedly set relative to the valve core. The upper and lower magnetic rings have the same polarity. A pointer is fixedly connected to the outside of the sliding sleeve.

[0017] In the above structure, when the fluid at port A pushes the valve core upward, the lower magnetic ring rises simultaneously with the valve core and approaches the top of the chamber. Since the upper and lower magnetic rings have the same polarity, according to the principle of magnetic repulsion, the upper magnetic ring is repelled and moves upward by the lower magnetic ring. At this time, the spiral slide, constrained by the sliding column, allows the sliding sleeve to rotate and slide upward, causing the pointer to rotate. The pointer's indication indicates whether the valve core inside the valve body is open.

[0018] The beneficial effects achieved by this utility model are:

[0019] This invention is applied to oil fields and can be used for fluid management in various scenarios, especially for releasing the pressure of gas inside oil well casings.

[0020] The valve core of this invention uses a spiral sliding method for fluid opening and closing control, which improves sealing performance and control accuracy. Its compact design and reliable performance provide a more efficient fluid control solution for oilfield development.

[0021] The valve core of this invention is provided with an anti-corrosion cap at the front end, which can prevent the fluid from directly eroding the valve core and can also divert the fluid.

[0022] In addition, to facilitate observation of the valve core's operating status, a status indicator that indicates the valve core's opening and closing can be installed on the upper part of the pressure control valve. This status indicator is a modular structure installed on the outside of the pressure control valve and can be installed or removed according to the needs of the production scenario without changing or affecting the normal operation of the pressure control valve. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention (valve core closed valve port state);

[0025] Figure 2This is a partial structural schematic diagram of Embodiment 1 of this utility model (with the valve port open).

[0026] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model (valve core closed valve port state);

[0027] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model (with the valve port open).

[0028] Figure 5 This is a structural schematic diagram of Embodiment 3 of this utility model;

[0029] Figure 6 This is a partial structural schematic diagram of Embodiment 3 of this utility model (valve core closed valve port state);

[0030] Figure 7 This is a partial structural schematic diagram of Embodiment 3 of this utility model (with the valve port open).

[0031] Figure 8 This is a structural schematic diagram of Embodiment 4 of this utility model;

[0032] Figure 9 This is a scene diagram of the utility model installed at the oil wellhead.

[0033] In the diagram: 1. Valve body; 2. Bushing; 3. Spiral groove; 4. Sliding shaft; 5. Valve core; 6. A interface; 7. B interface; 8. Pin; 9. Corrosion cap; 10. Valve port; 11. Valve seat; 12. Lower magnetic ring; 13. Upper magnetic ring; 14. Sliding sleeve; 15. Sliding column; 16. Spiral groove; 17. Pointer; 18. Fixed column; 19. Positioning column; 20. Guide groove; 21. Non-magnetic plate; 22. Oil well casing; 23. Suction tubing; 24. Oil pipeline. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] Example 1:

[0036] like Figure 1 , Figure 2 As shown, a one-way rotary closed pressure control valve includes a valve body 1, and also includes an A port 6 and a B port 7 that are respectively connected to the valve body 1. The A port 6 is connected to the lower end of the valve body 1, and the B port 7 is connected to the side of the valve body 1, allowing fluid to flow laterally relative to the pressure control valve.

[0037] A valve seat 11 is provided inside the valve body 1, and a valve port 10 is provided at the valve seat 11. A valve core 5 is provided at the valve port 10, which can block it. The valve core 5 is located at the upper part of the valve port 10. The valve core 5 only allows fluid to flow from port A 6 to port B 7. The valve core 5 can move up and down relative to the valve body 1. While moving up and down inside the valve body 1, the valve core 5 can also rotate.

[0038] The valve core 5 is equipped with a spiral groove 3, and the valve body 1 is correspondingly equipped with a pin 8, which can slide and cooperate with the spiral groove 3.

[0039] Specifically, a sliding shaft 4 is fixedly connected to the top of the valve core 5. The sliding shaft 4 is coaxially arranged with the valve core 5. A bushing 2 is fixedly arranged on the inner wall of the valve body 1. The sliding shaft 4 is movably arranged inside the bushing 2. A pin 8 is fixedly connected to the inner side of the bushing 2. A spiral groove 3 is opened on the outer surface of the sliding shaft 4. The spiral groove 3 is spirally arranged along the center line of the sliding shaft 4. The pin 8 is movably arranged in the spiral groove 3, and the two can slide relative to each other.

[0040] A corrosion-resistant cap 9 is fixedly connected to the bottom of the valve core 5. The diameter of the corrosion-resistant cap 9 is smaller than the minimum diameter of the valve port 10. The corrosion-resistant cap 9 can prevent fluid from directly eroding the valve core 5 and can also divert the flow.

[0041] The contact surface between the valve port 10 and the valve core 5 is an inclined conical structure. The valve core 5 gradually closes the valve port 10 through a rotational break-in process, so each closure of the valve port 10 is a rotational grinding and self-repairing process. The inner and outer conical structure and the rotational closing method are suitable for scenarios involving viscous, gravel, and other mixed media. For example, the rotational closing method can rotate and push hard objects such as viscous crude oil and gravel away from the valve port 10 to close it, or it can rotate and cut ropes or straw.

[0042] The specific working principle of this utility model is as follows: When the fluid enters through port A 6, the pressure is enough to open the valve core 5, the valve core 5 opens and rises, and the sliding shaft 4 rises synchronously. The spiral groove 3 of the sliding shaft 4 cooperates with the pin 8, so that the sliding shaft 4 and the valve core 5 rotate when rising. At this time, the fluid enters the valve body 1 through port A 6 and then enters port B 7. When the fluid stops entering through port A 6, the valve core 5 descends and closes the valve port 10 under the combined action of gravity and the reverse flow of the valve port 10. During the descent, it also rotates, thereby achieving rotational closure and avoiding impact.

[0043] Specific application scenario of this utility model: 1. Oil wellhead casing connection: such as... Figure 9As shown, the well casing 22 is located outside the sucker pipe 23, and the oil pipeline 24 is connected to the wellhead of the sucker pipe 23. The two interfaces of this utility model are respectively connected to the well casing 22 and the oil pipeline 24. When the gas pressure inside the well casing 22 is greater than the pressure in the oil pipeline 24, the valve core 5 opens, and dangerous gases such as natural gas in the well casing 22 enter through interface A 6. After passing through the pressure control valve, they enter the oil pipeline 24 to release the pressure and avoid the occurrence of safety accidents.

[0044] Application Scenario 2: Anti-surge flow in oil pipelines: One-way rotary pressure control valves are installed on oil pipelines at the wellhead to prevent crude oil from flowing back into the well.

[0045] Application Scenario 3: Oil well crude oil water mixing: The two ends of the one-way closed-loop pressure control valve are connected to the water injection pipeline and the crude oil pipeline respectively, allowing high-pressure water to be injected into the crude oil pipeline and blocking the reverse flow of crude oil into the water injection pipeline.

[0046] Example 2:

[0047] like Figure 3 , Figure 4 As shown, this embodiment is basically the same as embodiment one, except that a status indicator is provided on the top of the valve body 1. The status indicator includes an upper magnetic ring 13, a lower magnetic ring 12, a non-magnetic plate 21, a fixed post 18, and a sliding sleeve 14. The top of the valve body 1 is fixedly connected to the non-magnetic plate 21, and the top of the non-magnetic plate 21 is fixedly connected to the fixed post 18. The sliding sleeve 14 is movably sleeved on the outside of the fixed post 18, and the outside of the fixed post 18 is fixedly connected to the sliding post 15. The surface of the sliding sleeve 14 is provided with a spiral slide 16, and the sliding post 15 and the spiral slide 16 slide in cooperation. The lower part of the sliding sleeve 14 is fixedly connected to the upper magnetic ring 13, and the lower magnetic ring 12 is fixedly set relative to the valve core 5. The upper magnetic ring 13 and the lower magnetic ring 12 have the same polarity, and a pointer 17 is fixedly connected to the outside of the sliding sleeve 14.

[0048] The non-magnetic plate 21 can be made of non-magnetic materials such as stainless steel 304 or stainless steel 316. Both the upper magnetic ring 13 and the lower magnetic ring 12 are ring-shaped structures.

[0049] In the above structure, when the fluid at interface A 6 pushes the valve core 5 upward, the lower magnetic ring 12 rises simultaneously with the valve core 5 and approaches the top of the chamber. Since the upper magnetic ring 13 and the lower magnetic ring 12 have the same polarity, according to the principle of magnetic repulsion, the upper magnetic ring 13 is repelled by the lower magnetic ring 12 and moves upward. At this time, the spiral slide 16, restricted by the sliding column 15, allows the sliding sleeve 14 to rotate upward and drive the pointer 17 to rotate. By indicating the pointer 17, it can be determined whether the valve core 5 inside the valve body 1 is open.

[0050] The status indicator can be installed as needed. The non-magnetic plate 21 can be connected to the top of the valve body 1 through various conventional methods such as bonding, welding, and flange connection, which facilitates disassembly. The lower magnetic ring 12 can also be connected to the top of the valve core 5 or the sliding shaft 4 through various conventional methods such as bonding, welding, and flange connection.

[0051] In addition, a transparent casing can be installed on the outside of the status indicator to protect it without obstructing observation.

[0052] Example 3:

[0053] like Figures 5-7 As shown, this embodiment is basically the same as embodiment two, except that the structure for achieving the rotational closure of the valve core 5 is different. Specifically: a sliding shaft 4 is fixedly connected to the top of the valve core 5, and the sliding shaft 4 is coaxially arranged with the valve core 5. A guide groove 20 is provided at the center of the top of the sliding shaft 4, and a spiral groove 3 is provided on the inner wall of the guide groove 20. The spiral groove 3 is spirally arranged along the center line of the sliding shaft 4. A positioning post 19 is fixedly connected to the top of the inner side of the valve body 1, and a pin 8 is fixedly connected to the outer surface of the positioning post 19. The positioning post 19 is slidably arranged inside the guide groove 20, and the pin 8 is movably arranged inside the spiral groove 3.

[0054] Example 4:

[0055] like Figure 8 As shown, this embodiment is basically the same as embodiment two, except that the structure for achieving the rotational closure of the valve core 5 is different. Specifically, the inner wall of the valve body 1 is provided with a spiral groove 3, which is spirally arranged along the center line of the valve body 1. The valve core 5 is slidably arranged inside the valve body 1, and a pin 8 is fixedly connected to the side of the valve core 5. The pin 8 is movably arranged in the spiral groove 3.

Claims

1. A one-way, spin-to-close, pressure control valve, characterized by, The valve body (1) includes an A port (6) and a B port (7) that are respectively connected to the valve body (1). The A port (6) is connected to the lower end of the valve body (1), and the B port (7) is connected to the side of the valve body (1). A valve seat (11) is provided inside the valve body (1). A valve port (10) is provided at the valve seat (11). A valve core (5) that can block the valve port (10) is provided at the valve port (10). The valve core (5) only allows fluid to flow from the A port (6) to the B port (7). The valve core (5) can move up and down relative to the valve body (1). While the valve core (5) moves up and down inside the valve body (1), it can rotate. The top of the valve core (5) is fixedly connected to a sliding shaft (4), which is coaxial with the valve core (5). A bushing (2) is fixedly installed on the inner wall of the valve body (1). The sliding shaft (4) is movably installed inside the bushing (2). A pin (8) is fixedly connected inside the bushing (2). A spiral groove (3) is opened on the outer surface of the sliding shaft (4). The spiral groove (3) is spirally installed along the center line of the sliding shaft (4). The pin (8) is movably installed in the spiral groove (3).

2. The one-way rotational shut-in pressure control valve according to claim 1, wherein The valve core (5) is equipped with a pin (8), and the valve body (1) is correspondingly provided with a spiral groove (3), or the valve core (5) is equipped with a spiral groove (3), and the valve body (1) is correspondingly equipped with a pin (8); The pin (8) can slide with the spiral groove (3).

3. The one-way rotary closed pressure control valve according to claim 1, characterized in that, The bottom of the valve core (5) is fixedly connected to an anti-corrosion cap (9), the diameter of which is smaller than the minimum diameter of the valve port (10).

4. The one-way rotary pressure control valve according to claim 1, characterized in that, The contact surface between the valve port (10) and the valve core (5) is an inclined conical surface structure.

5. The one-way rotary closed pressure control valve according to claim 1, characterized in that, A status indicator is provided on the top of the valve body (1). The status indicator includes an upper magnetic ring (13), a lower magnetic ring (12), a non-magnetic plate (21), a fixed column (18), and a sliding sleeve (14). The top of the valve body (1) is fixedly connected to the non-magnetic plate (21). The top of the non-magnetic plate (21) is fixedly connected to the fixed column (18). The sliding sleeve (14) is movably sleeved on the outside of the fixed column (18). The outside of the fixed column (18) is fixedly connected to the sliding column (15). The surface of the sliding sleeve (14) is provided with a spiral slide (16). The sliding column (15) and the spiral slide (16) slide together. The lower part of the sliding sleeve (14) is fixedly connected to the upper magnetic ring (13). The lower magnetic ring (12) is fixedly set relative to the valve core (5). The upper magnetic ring (13) and the lower magnetic ring (12) have the same polarity. The outside of the sliding sleeve (14) is fixedly connected to a pointer (17).

Images