A reversing pressure reducing combination control valve and method of use

Abstract

The application discloses a kind of commutating pressure reducing combination control valve and its use method.The control valve includes: valve body, pressure reducing mechanism and commutating mechanism being arranged in valve body, and pressure regulating mechanism being connected with valve body and pressure reducing mechanism respectively;Valve body is provided with inlet, low pressure outlet and high pressure outlet, and low pressure cavity is arranged in valve body and communicated with low pressure outlet;Pressure reducing mechanism includes pressure reducing box and plunger being installed in valve body, and pressure reducing port is formed between pressure reducing box and plunger;Pressure reducing box is connected with pressure regulating mechanism, to drive pressure reducing box to move to adjust the size of pressure reducing port by pressure regulating mechanism;Commutating mechanism includes commutating assembly and valve core, valve core is installed in valve body, and low pressure flow channel and high pressure flow channel are arranged on valve core and not communicated with each other;Commutating assembly is connected with valve core to drive valve core to rotate to make inlet, high pressure flow channel and high pressure outlet communicate, or make inlet, low pressure flow channel, pressure reducing port, low pressure cavity and low pressure outlet communicate.The control valve can meet the demand of commutation and pressure regulation simultaneously.

Description

Technical Field

[0001] This invention relates to the field of pressure control technology for high-pressure and low-pressure pipeline equipment, and particularly to a reversing pressure reducing combined control valve and its usage method. Background Technology

[0002] In recent years, there has been an increasing number of unconventional and complex well conditions, such as high-risk and variable operating conditions. Traditional control pipeline configurations are insufficient to meet the high requirements of the field. Given the current demand for high-pressure and high-volume control devices for complex wellheads, it is essential to ensure that the control devices can achieve safe and stable control of complex wellheads. Currently, there are many types of valves used in control pipelines. For low-flow and low-pressure manifolds, the multi-functional combination valves used are almost all electromagnetic combination valves. However, for high-pressure and high-flow pipelines, the pressure and reversing functions often require the installation of corresponding pressure regulating devices and direction adjusting devices for separate control. Summary of the Invention

[0003] The inventors have discovered that existing combination valves used in control pipelines for complex wellheads have problems such as small control flow rate, small pressure regulation range, poor control accuracy, and unstable outlet pressure due to pressure fluctuations. Furthermore, they are difficult to simultaneously regulate and control the pressure of high-pressure, high-flow-rate pressure regulating media and change the on / off function of various pipelines in the hydraulic system, thereby increasing the cost of the equipment.

[0004] In view of the above problems, the present invention is proposed to provide a reversing pressure reducing combination control valve and its method of use that overcomes or at least partially solves the above problems.

[0005] This invention provides a reversing and pressure-reducing combined control valve, comprising: a valve body, a pressure regulating mechanism, a pressure reducing mechanism, and a reversing mechanism;

[0006] The pressure reducing mechanism and the reversing mechanism are disposed in the valve body, and the pressure regulating mechanism is connected to the valve body and the pressure reducing mechanism respectively;

[0007] The valve body is provided with an inlet, a low-pressure outlet and a high-pressure outlet, and the valve body is provided with a low-pressure chamber, which is connected to the low-pressure outlet;

[0008] The pressure reducing mechanism includes a pressure reducing box and a plunger installed in the valve body. The pressure reducing box and the plunger are slidably connected, and a pressure reducing port is formed between them. The pressure reducing box is connected to a pressure regulating mechanism so that the pressure reducing box can be moved by the pressure regulating mechanism to adjust the size of the pressure reducing port.

[0009] The reversing mechanism includes a reversing component and a valve core. The valve core is installed in the valve body and has a low-pressure flow channel and a high-pressure flow channel that are not interconnected.

[0010] The reversing assembly is connected to the valve core to drive the rotation of the valve core, thereby connecting the inlet, high-pressure flow channel and high-pressure outlet, or connecting the inlet, low-pressure flow channel and pressure reducing port.

[0011] In an optional embodiment, the center points of the first inlet and first outlet of the low-pressure flow channel and the second inlet and second outlet of the high-pressure flow channel are distributed on the same circumference, and the circumference is centered on the center point of the valve core.

[0012] In an optional embodiment, the valve body is further provided with a first flow channel and a second flow channel;

[0013] With the inlet connected to the low-pressure flow channel, the first flow channel is connected to the first outlet;

[0014] With the inlet connected to the high-pressure flow channel, the second flow channel is connected to the second outlet.

[0015] In an optional embodiment, the plunger includes: a first plunger and a second plunger;

[0016] The pressure relief box is disposed between the first plunger and the second plunger, and a pressure relief port is formed between the pressure relief box and the first plunger;

[0017] The first plunger is provided with a third flow channel, which is connected to the first flow channel, and the third flow channel is connected to the low-pressure chamber through a pressure reducing port.

[0018] In an optional embodiment, a through hole is provided on the end face of the pressure relief box, and a sealing ring is provided in the through hole. The sealing ring contacts the inner wall of the through hole through a support frame and can slide relative to the inner wall.

[0019] In an optional embodiment, the through hole on the end face of the pressure relief box includes a first through hole and a second through hole, wherein a pressure relief sealing ring is disposed in the first through hole and an oil return sealing ring is disposed in the second through hole.

[0020] In an optional embodiment, the first plunger is further provided with a reflux port, which connects the low-pressure chamber and the low-pressure outlet.

[0021] In an optional embodiment, the reversing assembly includes: a reversing handle, a fastener assembly, and a pivot;

[0022] One end of the reversing handle is connected to the rotating shaft via the fastener assembly, and the other end of the rotating shaft is connected to the valve core.

[0023] In an optional embodiment, the reversing mechanism further includes: a valve seat;

[0024] The valve seat is disposed in the valve body, with one end abutting against the valve core and the other end abutting against the valve body, and a corrugated plate is provided at the end abutting against the valve body.

[0025] In an optional embodiment, the pressure regulating mechanism includes: a pressure regulating handle, a locking handle, a spring cover, and an upper spring seat, a spring, and a lower spring seat arranged sequentially from top to bottom within the spring cover;

[0026] The spring cover is sealed to the valve body and the pressure reducing box by a sealing seat;

[0027] The lower end of the pressure regulating handle is connected to the upper spring seat, and the lower spring seat is connected to the pressure reducing box, so that the pressure regulating handle drives the movement of the spring to drive the movement of the pressure reducing box, thereby controlling the size of the pressure reducing port;

[0028] The locking handle is used to lock the position of the pressure regulating handle, thereby locking the size of the pressure reducing port.

[0029] In an optional embodiment, the combined control valve further includes a drive head;

[0030] The drive head is connected to the pressure regulating mechanism and the reversing mechanism respectively, and is used to control the movement of the reversing handle of the reversing mechanism and / or the pressure regulating handle of the pressure regulating mechanism.

[0031] Based on the same inventive concept, embodiments of the present invention also provide a method for using the above-mentioned combined control valve, including:

[0032] The rotation of the reversing assembly valve core connects the inlet, high-pressure flow channel, and high-pressure outlet, allowing the pressure regulating medium to flow out from the high-pressure outlet; or

[0033] The pressure regulating mechanism drives the pressure reducing box to move to adjust the position of the pressure reducing port to a predetermined position and lock the position; the reversing component controls the rotation of the valve core to connect the inlet with the low-pressure outlet, so that the input pressure regulating medium flows through the low-pressure channel, passes through the pressure reducing port, enters the low-pressure chamber, and flows out through the low-pressure outlet.

[0034] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0035] The present invention provides a reversing and pressure-reducing combined control valve and its usage method, comprising: a valve body, a pressure regulating mechanism, a pressure reducing mechanism, and a reversing mechanism; the pressure reducing mechanism and the reversing mechanism are disposed within the valve body, and the pressure regulating mechanism is connected to the valve body and the pressure reducing mechanism respectively; the valve body is provided with an inlet, a low-pressure outlet, and a high-pressure outlet, and a low-pressure chamber is provided within the valve body, and the low-pressure chamber is connected to the low-pressure outlet; the pressure reducing mechanism includes a pressure reducing box and a plunger installed within the valve body, the pressure reducing box and the plunger are slidably connected, and a pressure reducing port is formed between them; the pressure reducing box is connected to the pressure regulating mechanism so as to drive the pressure reducing box to move to adjust the size of the pressure reducing port; the reversing mechanism includes a reversing component and a valve core, the valve core is installed within the valve body, and the valve core is provided with a low-pressure flow channel and a high-pressure flow channel that are not interconnected; the reversing component is connected to the valve core so as to drive the rotation of the valve core, thereby connecting the inlet, the high-pressure flow channel, and the high-pressure outlet, or connecting the inlet, the low-pressure flow channel, and the pressure reducing port. The combined control valve provided in this invention can be connected to both low-pressure and high-pressure manifolds simultaneously. For different operating conditions, the direction can be adjusted according to on / off requirements to select the connectivity of the internal flow channels, thereby controlling the output direction of the pressure regulating medium. Specifically, the rotation of the reversing assembly drives the valve core to move relative to the valve body, connecting the inlet to the low-pressure or high-pressure flow channel of the valve core. Fluid flows into the combined control valve from the valve body inlet, enters the corresponding flow channel of the valve core, and flows out from the outlet of the corresponding high-pressure or low-pressure flow channel. Furthermore, when one flow channel is connected, the other channel is closed. This invention allows for the control of the on / off state of both low-pressure and high-pressure manifolds, facilitating pipeline disassembly, inspection, and maintenance during operation. The pressure reduction value of the pressure-reducing mechanism can be adjusted via a pressure regulating mechanism. This mechanism controls the movement of the pressure-reducing box to control the size of the pressure-reducing port. Once the pressure is set, and the position of the pressure-reducing port is determined, regardless of fluctuations in the pressure of the regulating medium at the inlet of the combined control valve, the pressure of the medium flowing out of the low-pressure outlet after pressure reduction remains at the set value, improving outlet pressure stability and control accuracy. This combined control valve has a compact structure, reducing redundant equipment and saving installation space when installed in the manifold. Furthermore, it offers multi-functionality, simultaneously regulating the pressure of the regulating medium and controlling the on / off state of both low-pressure and high-pressure manifolds, thus saving equipment costs.

[0036] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0037] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a schematic diagram of the reversing pressure reducing combined control valve in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the pressure-reducing combination control valve in the pressure-reducing state in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the valve core flow channel structure of the reversing mechanism;

[0042] Figure 4 This is a cross-sectional view of the reversing mechanism of the reversing pressure reducing combined control valve in an embodiment of the present invention;

[0043] Figure 5 This is a partial schematic diagram of the valve body structure in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram illustrating the working principle of the reversing mechanism in one state according to an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram illustrating the working principle of the reversing mechanism in another state in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100-Pressure regulating mechanism, 200-Pressure reducing mechanism, 300-Reversing mechanism, 110-Drive head, 101-Pressure regulating handle, 102-Locking handle, 103-Upper spring seat, 104-Spring, 105-Spring cover, 106-Lower spring seat, 107-Spring energy storage chamber, 201-First plunger, 202-Return oil sealing ring, 203-Pressure reducing sealing ring, 204-Pressure reducing box, 205-Sealing seat, 206-Second plunger, 207-Low pressure outlet, 208 - Support frame, 209- Pressure reducing port, 210- Low pressure chamber, 211- Third flow channel, 212- Return port, 301- First flow channel, 302- Rotating shaft, 303- Valve core, 304- Sealing surface, 305- Valve seat, 306- Bellows plate, 307- Valve body, 308- Reversing handle, 309- Fastener assembly, 310- Inlet, 311- High pressure outlet, 312- Second inlet, 313- Second outlet, 314- First inlet, 315- Second inlet; Detailed Implementation

[0048] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The inventors have discovered that the existing classification of control valves used in complex well conditions has the following shortcomings:

[0052] (1) Conventional pressure control valves have a small flow rate, a small pressure range, and poor control accuracy, and are often affected by pressure fluctuations and fail. For large flow rates, the high pressure and pressure difference are easily affected by the pressure fluctuation at the input end, which can cause unstable output pressure and unbalanced internal medium pressure, resulting in unstable outlet pressure.

[0053] (2) Conventional directional control valves only control the opening and closing of pipelines and cannot regulate pipeline hydraulic pressure. If pressure change control is required, corresponding pressure regulating mechanisms need to be configured separately, which increases equipment costs.

[0054] To address the current demand for high-pressure, high-volume control devices in complex wellheads and ensure safe and stable control of these wellheads, a reversing and pressure-reducing combined control valve is proposed. This invention provides a reversing and pressure-reducing combined control valve that not only regulates and controls the pressure of high-pressure, high-flow manifolds but also functions as a directional control valve to change the on / off state of various pipelines in the hydraulic system.

[0055] To address the problems existing in the prior art, embodiments of the present invention provide a reversing pressure reducing combined control valve and its usage method.

[0056] It should be noted that the high pressure and low pressure mentioned in the embodiments of the present invention are relative, and do not refer to a specific pressure range as high pressure or low pressure. For example, the medium that flows out after entering the combined control valve through the pressure reducing port is called the low pressure medium, the medium that flows out directly after entering the combined control valve without pressure reducing the pressure through the pressure reducing port is called the high pressure medium, and the chamber into which the pressure regulating medium enters after passing through the pressure reducing port is called the low pressure chamber, etc. At the same time, the pressure regulating medium of the combined control valve can be either gas or liquid, so that pressure regulation of gas and liquid can be achieved.

[0057] Reference Figure 1 and Figure 2 As shown, the reversing and pressure reducing combined control valve provided in this embodiment of the invention includes: a valve body 307, a pressure regulating mechanism 100, a pressure reducing mechanism 200, and a reversing mechanism 300.

[0058] The pressure reducing mechanism 100 and the reversing mechanism 300 are installed inside the valve body 307, and the pressure regulating mechanism 100 is connected to the valve body and the pressure reducing mechanism respectively.

[0059] The valve body is provided with an inlet 310, a low-pressure outlet 207 and a high-pressure outlet 311. The valve body is provided with a low-pressure chamber 210, and the low-pressure chamber 210 is connected to the low-pressure outlet 207.

[0060] The pressure reducing mechanism includes a pressure reducing box 204 and a plunger installed in the valve body. The pressure reducing box and the plunger are slidably connected, and a pressure reducing port is formed between them. The pressure reducing box 204 is connected to a pressure regulating mechanism so that the pressure reducing box can be moved by the pressure regulating mechanism to adjust the size of the pressure reducing port.

[0061] The reversing mechanism includes a reversing component and a valve core. The valve core is installed in the valve body and has a low-pressure flow channel and a high-pressure flow channel that are not interconnected.

[0062] The reversing assembly is connected to the valve core to drive the rotation of the valve core, thereby connecting the inlet 301, the high-pressure flow channel and the high-pressure outlet 311, or connecting the inlet 310, the low-pressure flow channel and the pressure reducing port 209.

[0063] This combined control valve, through the movement of the reversing assembly, rotates the valve core relative to the valve body, connecting the inlet, high-pressure flow channel, and high-pressure outlet. This allows the pressure-regulating medium entering the combined control valve to flow through the high-pressure flow channel and exit from the high-pressure outlet. At this point, the pressure-regulating medium serves as the high-pressure control flow input to the high-pressure pipeline connected to the high-pressure outlet. Simultaneously, the movement of the reversing assembly also rotates the valve core, connecting the inlet, low-pressure flow channel, and pressure-reducing port. This allows the pressure-regulating medium entering the combined control valve to flow through the low-pressure flow channel, be depressurized through the pressure-reducing port, and exit from the low-pressure outlet. At this point, the pressure-regulating medium serves as the low-pressure control flow input to the low-pressure pipeline connected to the low-pressure outlet. Furthermore, when the movement of the reversing assembly rotates the valve core... When the inlet is positioned between the inlet of the high-pressure flow channel and the inlet of the low-pressure flow channel, the combined control valve is in the closed state. Furthermore, the pressure reducing port in this combined control valve can be adjusted via a pressure regulating mechanism. Once the pressure of the pressure regulating port is set, regardless of the pressure fluctuations of the pressure-regulating medium entering the combined control valve from the inlet, the pressure-regulating medium, after being reduced by the pressure reducing port, will always maintain the set pressure value when flowing out of the low-pressure outlet, thus improving the stability of the low-pressure outlet pressure. This combined control valve can switch directions according to pressure requirements, ensuring the on / off state of each connected pipeline and regulating the pressure of the regulating medium. It has a simple structure, can perform multiple functions, and its installation in a manifold can reduce other redundant equipment, saving equipment costs.

[0064] Optional, refer to Figure 3 As shown, the center points of the first inlet 314 and the first outlet 315 of the low-pressure flow channel and the second inlet 312 and the second outlet 313 of the high-pressure flow channel are distributed on the same circumference, and the circumference is centered on the center point of the valve core 303. When the center points of each outlet are located on the same circumference, the valve core 303 can be rotated under the drive of the reversing assembly to better achieve the conduction of different flow channels. It should be noted that the specific positions and positional relationships of the first inlet 314 and the first outlet 315 of the low-pressure flow channel and the second inlet 312 and the second outlet 313 of the high-pressure flow channel on the valve core 303 are as long as it enables the inlet 310 to connect with the high-pressure flow channel and the high-pressure outlet when the reversing assembly drives the valve core to rotate, or to connect the inlet with the low-pressure flow channel and the pressure reducing port. Similarly, the specific shapes of the first inlet 314 and the first outlet 315 of the low-pressure flow channel and the second inlet 312 and the second outlet 313 of the high-pressure flow channel are not specifically limited in this embodiment of the invention, such as being circular, square, or irregular shapes. Preferably, the first inlet 314, the second inlet 312, the first outlet 315, and the second outlet 313 are set as circles, with their center points being the centers of the circles.

[0065] The valve body of this combined control valve is also provided with a first flow channel 301 and a second flow channel (not shown in the figure), the schematic diagram of which can be found in the figure below. Figure 5 As shown;

[0066] With the inlet connected to the low-pressure flow channel, the first flow channel 301 is connected to the first outlet 315 so that the pressure regulating medium flowing out of the first outlet 315 flows into the first flow channel 301.

[0067] With the inlet connected to the high-pressure flow channel, the second flow channel is connected to the second outlet 313 so that the pressure regulating medium flowing out from the second outlet 313 flows into the second flow channel.

[0068] The plungers of the combined control valve include: a first plunger 201 and a second plunger 206;

[0069] The pressure relief box 204 is disposed between the first plunger 201 and the second plunger 206, and a pressure relief port is formed between the pressure relief box 204 and the first plunger 201;

[0070] The first plunger 201 is provided with a third flow channel 211, which is connected to the first flow channel 301. The third flow channel 211 is also connected to the low-pressure chamber through a pressure reducing port, so that the pressure regulating medium flows out of the first flow channel, flows through the third flow channel, and flows into the low-pressure chamber after being depressurized through the pressure reducing port.

[0071] In an optional embodiment, a through hole is provided on the end face of the pressure relief box 204, and a sealing ring is provided in the through hole. The sealing ring can contact the inner wall of the through hole through the support frame 208 and can slide relative to the inner wall. The sealing ring can be made of metal, and the support frame can be made of elastic element so that the sealing ring can slide relative to the inner wall. Figure 2 As shown, the through holes on the end face of the pressure reducing box may include a first through hole and a second through hole. A pressure reducing sealing ring 203 is provided in the first through hole, and a return oil sealing ring 202 is provided in the second through hole. The third flow channel 211 on the first plunger 201 is offset from the first through hole, thus achieving partial communication between the third flow channel and the first through hole. When the pressure regulating medium flows through the third flow channel 211, it can flow to the pressure reducing sealing ring 203. Since the pressure reducing sealing ring can slide relative to the inner wall of the first through hole, the pressure regulating medium flowing through the pressure reducing sealing ring and into the low-pressure chamber from the pressure reducing port can achieve a gradual pressure reduction effect. In other words, the pressure reducing sealing ring 203 can both achieve a seal between the first plunger 201 and the pressure reducing box 204 and achieve a better pressure reduction effect.

[0072] Optionally, the first plunger 201 is also provided with a return port 212, which connects the low-pressure chamber and the low-pressure outlet, so that the return fluid generated by the pressure regulating medium at the low-pressure outlet under back pressure flows back into the low-pressure chamber 210 after passing through the through hole at the return oil sealing ring, so as to prevent affecting the change of outlet pressure and improve the stability of the outlet pressure after pressure regulation.

[0073] In an optional embodiment, the reversing assembly includes: a reversing handle 308, a fastener assembly 309, and a pivot 302;

[0074] One end of the reversing handle 308 is connected to the rotating shaft 302 via a fastener assembly, and the other end of the rotating shaft 302 is connected to the valve core 303. By rotating the reversing handle 308, the rotating shaft 302 can be rotated, which in turn drives the valve core 303 connected thereto to rotate, so as to switch different flow channels. The end face of the rotating shaft may be provided with a wedge-shaped hole or groove to facilitate tight fixing with the valve core.

[0075] Optional, refer to Figure 4 As shown, the reversing mechanism also includes: valve seat 305;

[0076] The valve seat 305 is disposed within the valve body 307. One end of the valve seat 305 abuts against the valve core 303, and the other end abuts against the valve body 307. A corrugated plate 306 is provided at the end abutting against the valve body 307. The valve seat can be embedded within the valve body, and the corrugated plate 306 at the end face where the valve seat abuts against the valve body allows the valve core 303 and the valve seat 305 to contact and form a sealing surface 304 under the elastic force of the corrugated plate 306. When a reversing operation is performed, the valve core 303 rotates... The rotation of shaft 302 drives valve core 303 to rotate along the center of shaft 302, resulting in relative sliding at sealing surface 304, thereby switching to different pressure flow channels; at the same time, valve seat 305 and bellows plate 306 are also provided with through holes, liquid flows in from inlet 310 of valve body 307, passes through the through holes of bellows plate 306 and valve seat 305, enters the corresponding inlet of valve core 303, passes through the internal flow channel of valve core 303, and flows out from the corresponding outlet of another channel of valve body.

[0077] In an optional embodiment, the pressure regulating mechanism 100 of the combined control valve includes: a pressure regulating handle 101, a locking handle 102, a spring cover 105, and an upper spring seat 103, a spring 104, and a lower spring seat 106 arranged sequentially from top to bottom inside the spring cover 105.

[0078] The spring cover 105 is sealed to the valve body 307 and the pressure reducing box 204 by the sealing seat 205;

[0079] The lower end of the pressure regulating handle 101 is connected to the upper spring seat 103, and the lower spring seat 106 is connected to the pressure reducing box 204, so that the pressure regulating handle drives the movement of the spring to drive the movement of the pressure reducing box, thereby controlling the size of the pressure reducing port 209.

[0080] The locking handle 102 is used to lock the position of the pressure regulating handle 101, thereby locking the size of the pressure reducing port 209.

[0081] The sealing seat 205 can be configured as a stepped structure with small diameters at both ends and a large diameter in the middle. One end is inserted into the valve body 307, and the other end abuts against the lower spring seat inside the external pressure regulating mechanism. The middle part mates with the end face of the valve body shell for axial positioning. The lower spring seat 106 inside the pressure regulating mechanism can be configured as a stepped structure with a diameter decreasing from top to bottom. Its top can be inserted into the spring 105 to prevent the spring 105 from deforming.

[0082] Optionally, the combined control valve also includes a drive head 110, which is connected to the pressure regulating mechanism and the reversing mechanism respectively. The drive head 110 is used to control the movement of the reversing handle 308 of the reversing mechanism and / or the pressure regulating handle 101 of the pressure regulating mechanism. That is, when using the combined control valve, the reversing handle of the reversing mechanism can be manually adjusted to make the shaft rotate and thus drive the valve core to rotate, or the pressure regulating handle can be manually adjusted to adjust the size of the pressure reducing port. Alternatively, the reversing handle and the pressure regulating handle can be connected to the drive head, and the movement of the drive head of the combined control valve can be driven by electric, pneumatic or hydraulic means to drive the rotation of the reversing handle or the pressure regulating handle to complete the reversing and pressure regulating operations. That is, the combined control valve provided in this embodiment of the invention can realize remote control and meet the requirements of on-site digital technology.

[0083] Optionally, both the reversing mechanism and the pressure reducing mechanism of this combined control valve can be metal-sealed to ensure the smooth completion of reversing and regulating operations under high pressure conditions.

[0084] The assembly process of the combined control valve in this embodiment of the invention can be as follows:

[0085] The valve core 303 is positioned and connected to the rotating shaft 302, and then installed into the valve body 307. The handle 308 is fixed to the top of the rotating shaft 302 by the fastener assembly 309, thus completing the installation of the reversing mechanism 300. During the installation of the reversing mechanism, attention should be paid to the relative positions of the valve core 303 and the valve body 307. The different relative positions between the valve core and the valve body during installation will affect the specific rotation angle during subsequent reversing adjustments. For example, if the valve core and valve body are in the state of being connected between the inlet and the high-pressure outlet during installation, then no further adjustment of the relative positions of the valve core and valve body is required when outputting from the high-pressure manifold. However, when outputting from the low-pressure manifold, the valve body needs to be rotated 90 degrees using the reversing assembly to connect the inlet with the first inlet of the low-pressure flow channel. Therefore, the adjustment angle of the corresponding positions of the valve core and valve body needs to be determined based on their initial installation positions. This embodiment of the invention is only an illustrative example, and specific adjustments can be made according to actual needs. Of course, corresponding markings can also be made on the valve core and valve body, and installation can be carried out according to specific markings for specific adjustments. This embodiment of the invention does not impose any specific limitations on this.

[0086] When installing the pressure reducing mechanism, first place the pressure reducing sealing ring 203 and the support frame 208 into the pressure reducing box 204, then install the pressure reducing box 204, the first plunger 201 and the second plunger 206 in a corresponding manner, and finally put the whole into the valve body 307. The valve body is sealed by the sealing seat 205 on the end face of the pressure reducing box 204 to complete the connection of the pressure reducing mechanism 200.

[0087] After the pressure reducing mechanism is installed, connect the pressure regulating handle 101, locking handle 102, and spring cover 105 in sequence. Then, install the upper spring seat 103, spring 104, and lower spring seat 106 into the spring cover 105 in sequence to complete the installation of the pressure regulating mechanism 100.

[0088] Finally, the pressure regulating mechanism 100 and the pressure reducing mechanism 200 are connected, that is, the lower spring seat 106 of the pressure regulating mechanism 100 is connected to the pressure reducing box of the pressure reducing mechanism 200.

[0089] Taking a liquid medium as an example, the working process of each mechanism in this embodiment of the invention can be described as follows:

[0090] (1) Reversing process:

[0091] During high-pressure operation, the control handle aligns the second inlet 312 of the high-pressure flow channel in the valve core with the corresponding end face of the inlet 310 on the valve body, allowing high-pressure liquid to flow in from the valve body inlet 310. The liquid then flows through the corresponding end face into the second inlet 312 of the valve core 303, and from the second inlet to the second outlet. Figure 6 As shown in the working principle diagram of the reversing mechanism, the pressure regulating liquid flows from the inlet 310 into the valve core and flows out from the second outlet 313, and then flows from the high pressure outlet into the connected high pressure manifold.

[0092] When the reversing operation is performed via the reversing handle 308, the shaft rotates 90°, and the first inlet 314 of the valve core 303 connects with the corresponding end face of the inlet 310 of the valve body 307. High-pressure fluid flows in from the valve body inlet 310, flows through the corresponding end face, enters the first inlet 314 of the valve core 303, and connects via the first outlet 315 of the valve core 303. (Refer to...) Figure 7 As shown. At this time, the high-pressure fluid enters the pressure reducing mechanism 200 from the first outlet 315, and is discharged from the opening 209 to the low-pressure chamber 210 according to the set low-pressure value. Then it is discharged from the low-pressure outlet 207 and flows into the low-pressure pipeline.

[0093] When the reversing handle is adjusted so that the end face corresponding to the inlet is located between the first inlet and the second inlet, the combined device disconnects the connection between the pipelines and shuts off the flow output.

[0094] (2) Working process of the pressure reduction mechanism:

[0095] The pressure reduction value of the pressure reducing mechanism 200 can be adjusted by the pressure regulating mechanism 100. Once the pressure is set, no matter how the pressure at the inlet of the reversing mechanism fluctuates, the pressure at its low-pressure output end will always be maintained at the set pressure value after the pressure is adjusted.

[0096] High-pressure fluid flows into the valve body 307 and rotates the handle 308, causing the shaft 302 to rotate. This reverses the position of the end face of the valve core 303 to the low-pressure flow channel position. The high-pressure fluid flows into the low-pressure flow channel corresponding to the valve core 303 from the valve body inlet 310, flows along the low-pressure flow channel of the valve core and into the first flow channel 301, then enters the third flow channel 211 of the oil inlet plunger 201, flows through the pressure reducing port 209 and then flows out to the low-pressure chamber 210. Finally, it is discharged from the low-pressure chamber 210 to the low-pressure outlet 207 and enters the low-pressure manifold. The pressure of the low-pressure chamber can be adjusted by the pressure regulating mechanism 100.

[0097] (3) Pressure regulation process:

[0098] The low-pressure chamber 210 inside the valve body is sealed to the external spring cover 105 by a sealing seat 205, separating the spring energy storage chamber 107 from the hydraulic low-pressure chamber 210. The lower part of the pressure regulating handle 101 contains the compression spring 104 of the pressure regulating mechanism. When the pressure regulating handle 101 moves downward, the spring 104 is compressed; when the pressure regulating handle 101 moves upward, the spring 104 returns to its original position. The pressure regulating mechanism 100 mainly uses the energy stored in the spring 104 to regulate the pressure of the liquid entering the low-pressure chamber. After the pressure is set, the locking handle 102 is locked to prevent the pressure regulating handle 101 from reversing and resetting. At this time, the fixed-value pressure reducing mechanism 200 performs fixed-value pressure reduction, ensuring stable output pressure. Simultaneously, during the discharge from the low-pressure outlet, the backflow fluid generated by the back pressure can be depressurized by the return oil sealing ring and discharged from the return port 212 to the low-pressure chamber 210 without affecting the pressure change of the output liquid.

[0099] The process of increasing the pressure relief port can be described as follows:

[0100] During pressure adjustment, the pressure adjustment handle 101 is turned to press the upper spring seat 103, thereby compressing the spring 104. The rotational motion of the pressure adjustment handle is converted into the axial compression motion of the spring 104. The axial compression force of the spring 104 is transmitted to the pressure reducing box 204 through the lower spring seat 106, pushing the pressure reducing box 204 to move downward. The pressure reducing sealing ring 203 is built into the pressure reducing box 204. As the pressure reducing box 204 moves, the opening 209 between the first plunger 201 and the sealing box is enlarged. When the opening 209 enlarges, the pressure value of the pressure regulating medium through the opening 209 increases.

[0101] The process of reducing the low-pressure port:

[0102] When the pressure regulating handle 101 is adjusted in the opposite direction, the spring 104's restoring force is transmitted upward to push the upper spring seat 103 to move upward. At the same time, under the pressure in the low-pressure chamber 210 of the valve body, the pressure reducing box 204 is pushed upward, and the pressure reducing port 209 formed between the first plunger 201 and the pressure reducing box 204 is reduced. At this time, the pressure of the pressure regulating medium 210 flowing into the low-pressure chamber through the opening 209 is reduced.

[0103] The combined control valve provided in this embodiment of the invention combines directional control and pressure control. The reversing mechanism mainly uses the rotation of the central shaft to drive the valve core and valve body to slide relative to each other, allowing the corresponding flow channels to switch. The pressure regulating mechanism mainly adjusts the axial displacement of the pressure reducing box by controlling the compression of the internal spring. The pressure reducing mechanism mainly reduces the inlet pressure to the required pressure value by controlling the pressure reducing port between the pressure reducing box and the first plunger. This combined control valve can connect to both low-pressure and high-pressure manifolds simultaneously. When a high-pressure medium is input, the direction can be selected according to the on / off requirements. When performing a reversing operation, the rotation of the shaft drives the valve core to rotate along the center of the shaft, creating relative sliding at the valve core and valve seat sealing surfaces, thereby switching to different pressure flow channels. The medium flows in from the inlet of the valve body, flows through the valve seat into the inlet of the corresponding flow channel of the valve core, passes through the internal flow channel of the valve core, and flows out from the corresponding outlet. Directional switching is achieved according to pressure requirements, ensuring the on / off of each pipeline and facilitating pipeline disassembly, inspection, and maintenance during operation. Furthermore, this combined control valve has a compact structure and complete functions. When installed in a manifold, it can reduce other redundant equipment and save installation space, meeting current market demands. At the same time, as a brand-new technology, the combined control valve of this invention can rapidly promote the development of high-pressure, high-flow components, which is conducive to the application of wellhead control systems and improves the market competitiveness of products.

[0104] Furthermore, in this embodiment of the invention, the pressure reduction value of the pressure reducing mechanism can be adjusted by the pressure regulating mechanism. Once the pressure is set, regardless of the pressure fluctuation at the high-pressure inlet of the reversing mechanism, after flowing through the internal through-flow channel of the reversing mechanism, i.e., the low-pressure flow channel, the flow impact at the inlet of the pressure regulating mechanism is reduced, ensuring the stability of the input pressure. This achieves the goal of keeping the low-pressure outlet at a pressure value no greater than the set pressure value, thereby improving the stability of the outlet pressure. That is, when the pressure value of the pressure regulating medium flowing into the inlet is greater than the set pressure value, it can be reduced by the pressure reducing port to keep the pressure of the medium output from the low-pressure outlet at the set value. Conversely, when the pressure value of the pressure regulating medium flowing into the inlet is less than the set pressure value, the pressure value of the medium flowing out from the low-pressure outlet is less than the set pressure value.

[0105] Based on the same inventive concept, embodiments of the present invention also provide a method for using the above-mentioned combined control valve, including:

[0106] The valve core is rotated by the reversing assembly, connecting the inlet, high-pressure flow channel, and high-pressure outlet to allow the pressure regulating medium to flow out from the high-pressure outlet; or

[0107] The pressure regulating mechanism drives the pressure reducing box to move, adjusts the position of the pressure reducing port to a predetermined position, and locks the position; the reversing component drives the valve core to rotate, so that the inlet is connected to the low-pressure outlet, so that the input pressure regulating medium flows through the low-pressure flow channel, passes through the pressure reducing port, enters the low-pressure chamber, and flows out through the low-pressure outlet.

[0108] Similarly, when the reversing component drives the valve core to rotate, connecting the inlet with the middle position of the high-pressure flow channel and the low-pressure flow channel, the entire combined control valve is in the pipeline closed state.

[0109] The specific usage method of this combined control valve has been described in detail in the above description of the combined control valve structure, which can be referred to for details, and will not be repeated here.

[0110] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0111] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0112] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A reversing pressure reducing combination control valve, characterized in that, include: Valve body, pressure regulating mechanism, pressure reducing mechanism, and reversing mechanism; The pressure reducing mechanism and the reversing mechanism are disposed in the valve body, and the pressure regulating mechanism is connected to the valve body and the pressure reducing mechanism respectively; The valve body is provided with an inlet, a low-pressure outlet and a high-pressure outlet, and the valve body is provided with a low-pressure chamber, which is connected to the low-pressure outlet; The pressure reducing mechanism includes a pressure reducing box and a plunger installed in the valve body. The pressure reducing box and the plunger are slidably connected, and a pressure reducing port is formed between them. The pressure reducing box is connected to a pressure regulating mechanism so that the pressure reducing box can be moved by the pressure regulating mechanism to adjust the size of the pressure reducing port. The pressure reducing box has a through hole on its end face, and a pressure reducing sealing ring is disposed in the through hole. The sealing ring contacts the inner wall of the through hole through a support frame and can slide relative to the inner wall. The through hole on the end face of the pressure reducing box includes a first through hole and a second through hole. The first through hole is disposed in the pressure reducing sealing ring, and the second through hole is disposed in the oil return sealing ring. The plunger is also provided with a return port, which connects the low-pressure chamber and the low-pressure outlet. The reversing mechanism includes a reversing component and a valve core. The valve core is installed in the valve body and has a low-pressure flow channel and a high-pressure flow channel that are not interconnected. The reversing assembly is connected to the valve core to drive the rotation of the valve core, thereby connecting the inlet, high-pressure flow channel and high-pressure outlet, or connecting the inlet, low-pressure flow channel and pressure reducing port.

2. The combined control valve as described in claim 1, characterized in that, The center points of the first inlet and first outlet of the low-pressure flow channel and the second inlet and second outlet of the high-pressure flow channel are distributed on the same circumference, and the circumference is centered on the center point of the valve core.

3. The combined control valve as described in claim 2, characterized in that, The valve body is also provided with a first flow channel and a second flow channel; With the inlet connected to the low-pressure flow channel, the first flow channel is connected to the first outlet; With the inlet connected to the high-pressure flow channel, the second flow channel is connected to the second outlet.

4. The combined control valve as described in claim 3, characterized in that, The plunger includes: a first plunger and a second plunger; The pressure relief box is disposed between the first plunger and the second plunger, and a pressure relief port is formed between the pressure relief box and the first plunger; The first plunger is provided with a third flow channel, which is connected to the first flow channel, and the third flow channel is connected to the low-pressure chamber through a pressure reducing port.

5. The control valve as described in claim 1, characterized in that, The reversing assembly includes: a reversing handle, a fastener assembly, and a pivot. One end of the reversing handle is connected to the rotating shaft via the fastener assembly, and the other end of the rotating shaft is connected to the valve core.

6. The combined control valve as described in claim 1, characterized in that, The reversing mechanism further includes: a valve seat; The valve seat is disposed in the valve body, with one end abutting against the valve core and the other end abutting against the valve body, and a corrugated plate is provided at the end abutting against the valve body.

7. The combined control valve as described in claim 1, characterized in that, The pressure regulating mechanism includes: a pressure regulating handle, a locking handle, a spring cover, and an upper spring seat, a spring, and a lower spring seat arranged sequentially from top to bottom inside the spring cover; The spring cover is sealed to the valve body and the pressure reducing box by a sealing seat; The lower end of the pressure regulating handle is connected to the upper spring seat, and the lower spring seat is connected to the pressure reducing box, so that the pressure regulating handle drives the movement of the spring to drive the movement of the pressure reducing box, thereby controlling the size of the pressure reducing port; The locking handle is used to lock the position of the pressure regulating handle, thereby locking the size of the pressure reducing port.

8. The combined control valve as described in any one of claims 1-7, characterized in that, It also includes the drive head; The drive head is connected to the pressure regulating mechanism and the reversing mechanism respectively, and is used to control the movement of the reversing handle of the reversing mechanism and / or the pressure regulating handle of the pressure regulating mechanism.

9. A method of using the combined control valve as described in any one of claims 1-8, characterized in that, include: The valve core is rotated by the reversing assembly to connect the inlet, high-pressure flow channel and high-pressure outlet so that the pressure regulating medium flows out from the high-pressure outlet; or The pressure regulating mechanism drives the pressure reducing box to move to adjust the position of the pressure reducing port to a predetermined position and lock the position; the reversing component controls the rotation of the valve core to connect the inlet with the low-pressure outlet, so that the input pressure regulating medium flows through the low-pressure channel, passes through the pressure reducing port, enters the low-pressure chamber, and flows out through the low-pressure outlet.

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