High-pressure stop valve assembly

Abstract

The utility model discloses a high-pressure stop valve assembly which comprises a main valve body, and a low-pressure pipeline and a high-pressure pipeline are arranged in the main valve body. A low-pressure liquid inlet for introducing low-pressure liquid into the low-pressure pipeline, a low-pressure liquid outlet for discharging the low-pressure liquid out of the low-pressure pipeline, a high-pressure liquid inlet for introducing high-pressure liquid into the high-pressure pipeline and a high-pressure liquid outlet for discharging the high-pressure liquid out of the high-pressure pipeline are formed in the outer wall of the main valve body; the main valve body is provided with a low-pressure control valve communicated and matched with the low-pressure pipeline and a high-pressure control valve communicated and matched with the high-pressure pipeline, and the main valve body is further provided with a linkage control valve communicated between the low-pressure control valve and the high-pressure control valve. Opening and closing operation of the high-pressure stop valve assembly is easy, convenient and efficient, the opening and closing operation difficulty of a hydraulic pipeline and the labor intensity of workers can be correspondingly reduced, and the opening and closing operation efficiency and the opening and closing control precision of the corresponding hydraulic pipeline are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pipeline control valve technology, and in particular to a high-pressure shut-off valve assembly. Background Technology

[0002] In existing hydraulic pipeline applications, conventional high-pressure plate gate valves are typically used as the pipeline switching control device. Although they can meet the basic pipeline switching control operation requirements, the operating pressure of existing high-pressure plate gate valves can reach up to 60MPa, which makes the actual operation of existing high-pressure plate gate valves under pressure extremely difficult. The switching operation process is time-consuming and labor-intensive, and the labor intensity of the workers is high.

[0003] Especially in the context of oilfield operating environments, the operation of opening and closing valves in oilfield-supporting water injection stations and water distribution stations is quite difficult. In actual operation, it is usually necessary for on-duty personnel to use auxiliary equipment such as long levers to help with the operation. This not only increases the difficulty of related pipeline switch control operations, but also restricts the corresponding pipeline control efficiency and accuracy, causing inconvenience to the operation and maintenance of the corresponding hydraulic system.

[0004] In view of this, how to optimize the operation of hydraulic system pipeline switches to make valve switching simpler and more efficient, reduce the difficulty of pipeline switch operation and the labor intensity of workers, and improve the efficiency and control accuracy of pipeline switch operation are important technical problems that need to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a high-pressure shut-off valve assembly. This high-pressure shut-off valve assembly is simple and efficient to operate, which can reduce the difficulty of operating hydraulic pipelines and the labor intensity of workers, and improve the efficiency and control accuracy of hydraulic pipeline operation.

[0006] To solve the above-mentioned technical problems, this utility model provides a high-pressure shut-off valve assembly, including a main valve body. The main valve body has a low-pressure pipeline and a high-pressure pipeline inside. The outer wall of the main valve body is provided with a low-pressure inlet for low-pressure liquid to enter the low-pressure pipeline, a low-pressure outlet for low-pressure liquid to exit the low-pressure pipeline, a high-pressure inlet for high-pressure liquid to enter the high-pressure pipeline, and a high-pressure outlet for high-pressure liquid to exit the high-pressure pipeline.

[0007] The main valve body is provided with a low-pressure control valve adapted to be connected to the low-pressure pipeline and a high-pressure control valve adapted to be connected to the high-pressure pipeline. The main valve body is also provided with a linkage control valve connecting the low-pressure control valve and the high-pressure control valve.

[0008] Preferably, the low-pressure control valve, the high-pressure control valve, and the linkage control valve are all insertion-type on / off valves;

[0009] The insert-type switching valve includes a cartridge valve body with an internal valve cavity, a valve core disposed within the cartridge valve body, and a handwheel disposed on the top of the cartridge valve body and linked to the valve core. The side of the cartridge valve body has a side valve port communicating with the valve cavity, and the bottom of the cartridge valve body has a lower valve port communicating with the valve cavity. A valve ball that is linked and cooperates with the valve core is also disposed in the valve cavity.

[0010] The lower valve port of the low-pressure control valve is connected to the lower valve port of the linkage control valve through a low-pressure pipe cavity located inside the main valve body, and the side valve port of the high-pressure control valve is connected to the side valve port of the linkage control valve through a high-pressure pipe cavity located inside the main valve body.

[0011] Preferably, the valve chamber includes a control chamber accommodating the valve core and a liquid guiding chamber accommodating the valve ball. The liquid guiding chamber is connected to the lower part of the control chamber. The liquid guiding chamber of the low-pressure control valve is connected between the low-pressure inlet and the low-pressure outlet. The liquid guiding chamber of the high-pressure control valve is connected between the high-pressure inlet and the high-pressure outlet. The liquid guiding chamber of the linkage control valve is connected between the liquid guiding chamber of the low-pressure control valve and the liquid guiding chamber of the high-pressure control valve.

[0012] Preferably, the top of the main valve body is provided with a low-pressure valve port communicating with the low-pressure pipeline, a high-pressure valve port communicating with the high-pressure pipeline, and a linkage valve port communicating between the low-pressure valve port and the high-pressure valve port.

[0013] The low-pressure control valve is inserted into the low-pressure valve port, the high-pressure control valve is inserted into the high-pressure valve port, and the linkage control valve is inserted into the linkage valve port.

[0014] Preferably, the side wall of the main valve body has three overflow ports that correspond one-to-one with and are interconnected with the low-pressure valve port, the high-pressure valve port and the linkage valve port.

[0015] Preferably, the low-pressure inlet, the low-pressure outlet, the high-pressure inlet, and the high-pressure outlet are all located below the overflow outlet.

[0016] Compared to the aforementioned background technology, the high-pressure shut-off valve assembly provided by this utility model, during operation, under normal working conditions, when it is necessary to maintain the flow of liquid in the hydraulic system, keeps the low-pressure control valve and the high-pressure control valve open respectively, and keeps the linkage control valve closed. At this time, the low-pressure liquid enters the low-pressure pipeline through the low-pressure inlet and then exits the low-pressure pipeline through the low-pressure outlet, so as to pass the low-pressure liquid to the downstream pressurizing mechanism for pressurization. After the pressurization is completed, the high-pressure liquid obtained enters the high-pressure pipeline through the high-pressure inlet and then exits the high-pressure pipeline through the high-pressure outlet. When maintenance or other shutdown procedures are required for the hydraulic system, the linkage control valve is opened. This instantly connects the high-pressure and low-pressure control valves, releasing pressure on the high-pressure control valve and related components in the high-pressure pipeline. Afterward, operations such as switching on / off and maintenance of the high-pressure control valve and its components can be easily performed. Once these operations are completed, simply closing the linkage control valve again isolates the low-pressure and high-pressure pipelines within the main valve body, ensuring independent conduction of the low-pressure and high-pressure pipelines and stable operation of related components during subsequent equipment operation. The high-pressure shut-off valve assembly, relying on the linkage control valve to disconnect and connect the low-pressure and high-pressure control valves, achieves mutual isolation between the low-pressure and high-pressure environments within the hydraulic system and allows for rapid pressure release when necessary. This significantly improves the efficiency and control accuracy of switching operations, particularly in the high-pressure pipelines, while effectively reducing the difficulty of switching operations and the workload of relevant personnel. Therefore, the overall switching control and operation of the high-pressure shut-off valve assembly is simpler and more efficient.

[0017] In another preferred embodiment of this utility model, the low-pressure control valve, the high-pressure control valve, and the linkage control valve are all insert-type switching valves; the insert-type switching valve includes a cartridge valve body with an internal valve cavity, a valve core disposed within the cartridge valve body, and a handwheel disposed on the top of the cartridge valve body and linked to the valve core; the side of the cartridge valve body has a side valve port communicating with the valve cavity, and the bottom of the cartridge valve body has a lower valve port communicating with the valve cavity; a valve ball that is linked to and cooperates with the valve core is also disposed within the valve cavity; wherein, the lower valve port of the low-pressure control valve and the lower valve port of the linkage control valve are connected through a low-pressure pipe cavity located inside the main valve body, and the side valve port of the high-pressure control valve and the side valve port of the linkage control valve are connected through a high-pressure pipe cavity located inside the main valve body. Under normal operating conditions, the linkage control valve is in the closed state, while the low-pressure control valve and the high-pressure control valve are in the open state. At this time, the low-pressure control valve and the high-pressure control valve are connected to the linkage control valve. However, since the linkage control valve itself is in the closed state, its valve chamber is blocked by its valve ball. Therefore, the lower valve port of the linkage control valve is not connected to its side valve port. Thus, the low-pressure control valve and the high-pressure control valve are not connected at this time. When maintenance and repair of hydraulic system equipment are required, the system needs to be shut down. At this time, operating the handwheel on top of the linkage control valve will synchronously move the valve core, causing the valve ball inside the linkage control valve to move away from the blocking position. This connects the lower valve port and the side valve port of the linkage control valve through the valve chamber, creating reliable conduction between the low-pressure control valve, low-pressure chamber, linkage control valve, high-pressure chamber, and high-pressure control valve. This conduction mechanism rapidly releases the internal pressure of the high-pressure pipeline to the low-pressure pipeline, achieving rapid and efficient pressure relief of the high-pressure pipeline. This allows the high-pressure shut-off valve assembly and its related pipeline system to achieve internal pressure balance, enabling personnel to easily perform equipment maintenance and repair. This effectively eliminates the safety risks to personnel and related equipment that may arise from the high internal pressure of the hydraulic system during maintenance, significantly improving the operational safety and reliability of the entire hydraulic system and its supporting equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A front view of a high-pressure shut-off valve assembly provided in a specific embodiment of this utility model;

[0020] Figure 2 for Figure 1 Top view;

[0021] Figure 3 for Figure 1 Side view;

[0022] Figure 4 for Figure 1 A structural sectional view.

[0023] in:

[0024] 10-Main valve body; 101-Low-pressure pipeline; 102-High-pressure pipeline; 103-Low-pressure inlet; 104-Low-pressure outlet; 105-High-pressure inlet; 106-High-pressure outlet; 107-Low-pressure cavity; 108-High-pressure cavity; 109-Overflow port; 110-Overflow pipe;

[0025] 11-Low-pressure control valve; 111-Low-pressure valve port;

[0026] 12-High-pressure control valve; 121-High-pressure valve port;

[0027] 13-Interlocking control valve; 131-Interlocking valve port;

[0028] 14-Cartridge valve body; 141-Valve core; 142-Side valve port; 143-Lower valve port; 144-Valve ball; 145-Control chamber; 146-Liquid guiding chamber. Detailed Implementation

[0029] The core of this utility model is to provide a high-pressure shut-off valve assembly. The switching operation of this high-pressure shut-off valve assembly is simple and efficient, which can reduce the difficulty of switching hydraulic pipelines and the labor intensity of workers, and improve the switching efficiency and control accuracy of the corresponding hydraulic pipelines.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" in this utility model 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 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 utility model according to the specific circumstances.

[0032] Furthermore, in this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features not being in direct contact but through another feature between them.

[0033] In addition, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" for the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model.

[0034] Please refer to the reference. Figures 1 to 4 .

[0035] In a specific embodiment, the high-pressure shut-off valve assembly provided by this utility model includes a main valve body 10. The main valve body 10 has a low-pressure pipeline 101 and a high-pressure pipeline 102 inside. The outer wall of the main valve body 10 is provided with a low-pressure inlet 103 for low-pressure liquid to enter the low-pressure pipeline 101, a low-pressure outlet 104 for low-pressure liquid to exit the low-pressure pipeline 101, a high-pressure inlet 105 for high-pressure liquid to enter the high-pressure pipeline 102, and a high-pressure outlet 106 for high-pressure liquid to exit the high-pressure pipeline 102.

[0036] The main valve body 10 is provided with a low-pressure control valve 11 that is adapted to communicate with the low-pressure pipeline 101 and a high-pressure control valve 12 that is adapted to communicate with the high-pressure pipeline 102. The main valve body 10 is also provided with a linkage control valve 13 that connects the low-pressure control valve 11 and the high-pressure control valve 12.

[0037] During specific equipment operation, under normal working conditions, when it is necessary to maintain the flow of liquid in the hydraulic system, the low-pressure control valve 11 and the high-pressure control valve 12 are kept open respectively, and the linkage control valve 13 is kept closed. At this time, the low-pressure liquid enters the low-pressure pipeline 101 through the low-pressure inlet 103, and then exits the low-pressure pipeline 101 through the low-pressure outlet 104, so that the low-pressure liquid can be introduced to the downstream pressurizing mechanism for pressurization. After the pressurization is completed, the high-pressure liquid obtained enters the high-pressure pipeline 102 through the high-pressure inlet 105, and then exits the high-pressure pipeline 102 through the high-pressure outlet 106.

[0038] When maintenance or other shutdown procedures are required for the hydraulic system, the linkage control valve 13 is opened. At this time, the high-pressure control valve 12 and the low-pressure control valve 11 will be connected instantly, thereby connecting the high-pressure pipeline 102 and the low-pressure pipeline 101. This allows the internal pressure of the high-pressure pipeline 102 to be released to the low-pressure pipeline 101, thus completing the pressure relief process for the high-pressure control valve 12 and related accessories at the high-pressure pipeline 102. This creates an internal pressure balance within the high-pressure shut-off valve assembly, after which the opening, closing, and maintenance of the high-pressure control valve 12 and its supporting components can be easily carried out. After the corresponding work is completed, the linkage control valve 13 only needs to be closed again to achieve mutual isolation between the low-pressure pipeline 101 and the high-pressure pipeline 102 inside the main valve body 10, ensuring the independent conduction of the low-pressure pipeline 101 and the high-pressure pipeline 102 and the stable operation of related supporting components during subsequent equipment operation.

[0039] The high-pressure shut-off valve assembly relies on the linkage control valve 13 to disconnect and connect the low-pressure control valve 11 and the high-pressure control valve 12, thereby isolating the low-pressure and high-pressure environments within the hydraulic system and enabling rapid pressure relief for the high-pressure environment when necessary. This effectively avoids the structural impact of the high-pressure environment on the related main valve body 10 components, and also significantly improves the switching operation efficiency and control accuracy of the hydraulic pipeline, mainly the high-pressure pipeline 102. As a result, the difficulty of the corresponding switching operation is effectively reduced, and the labor intensity of the relevant personnel is also reduced accordingly. Therefore, the overall switching control and operation process of the high-pressure shut-off valve assembly is simpler and more efficient.

[0040] Specifically, the low-pressure control valve 11, the high-pressure control valve 12, and the linkage control valve 13 are all insert-type switching valves. The insert-type switching valve includes a cartridge valve body 14 with a valve cavity inside, a valve core 141 arranged in the cartridge valve body 14, and a handwheel arranged on the top of the cartridge valve body 14 and linked to the valve core 141. The side of the cartridge valve body 14 has a side valve port 142 communicating with the valve cavity, and the bottom of the cartridge valve body 14 has a lower valve port 143 communicating with the valve cavity. A valve ball 144 that is linked and cooperates with the valve core 141 is also provided in the valve cavity.

[0041] Specifically, in this plan, refer to... Figure 4 As shown, the lower valve port 143 of the low-pressure control valve 11 is connected to the lower valve port 143 of the linkage control valve 13 through the low-pressure cavity 107 located inside the main valve body 10, while the side valve port 142 of the high-pressure control valve 12 is connected to the side valve port 142 of the linkage control valve 13 through the high-pressure cavity 108.

[0042] Under normal operating conditions, the linkage control valve 13 is in the closed state, while the low-pressure control valve 11 and the high-pressure control valve 12 are in the open state. At this time, the low-pressure control valve 11 and the high-pressure control valve 12 are connected to the linkage control valve 13. However, since the linkage control valve 13 itself is in the closed state, its valve chamber is blocked by its valve ball 144. Therefore, the lower valve port 143 and the side valve port 142 of the linkage control valve 13 are not connected at this time. Thus, the low-pressure control valve 11 and the high-pressure control valve 12 are not connected at this time either.

[0043] When maintenance or repair of hydraulic system equipment is required, the system needs to be shut down. In this case, operating the handwheel at the top of the linkage control valve 13 will synchronously move the valve core 141, causing the valve ball 144 inside the linkage control valve 13 to move away from the blocked position. This allows the lower valve port 143 of the linkage control valve 13 to connect with its side valve port 142 through the valve chamber, thus establishing reliable communication between the low-pressure control valve 11, the low-pressure pipe chamber 107, the linkage control valve 13, the high-pressure pipe chamber 108, and the high-pressure control valve 12. By utilizing this conduit mechanism, the internal pressure of the high-pressure pipeline 102 is rapidly released to the low-pressure pipeline 101, thereby achieving rapid and efficient pressure relief of the high-pressure pipeline 102. This allows the high-pressure shut-off valve assembly and its related pipeline system to achieve internal pressure balance, enabling personnel to easily carry out corresponding equipment maintenance and repair. This effectively eliminates the safety risks that may be caused to personnel and related equipment due to the high internal pressure of the hydraulic system during maintenance, and significantly improves the operational safety and reliability of the entire hydraulic system and its supporting equipment.

[0044] More specifically, the valve chamber includes a control chamber 145 housing the valve core 141 and a liquid guiding chamber 146 housing the valve ball 144. The liquid guiding chamber 146 is connected to the lower part of the control chamber 145. The liquid guiding chamber 146 of the low-pressure control valve 11 is connected between the low-pressure inlet 103 and the low-pressure outlet 104. The liquid guiding chamber 146 of the high-pressure control valve 12 is connected between the high-pressure inlet 105 and the high-pressure outlet 106. The liquid guiding chamber 146 of the linkage control valve 13 is connected between the liquid guiding chamber 146 of the low-pressure control valve 11 and the liquid guiding chamber 146 of the high-pressure control valve 12. The side valve port 142 is connected to the side of the liquid guiding chamber 146. The liquid guiding chamber 146 provides sufficient space for the valve ball 144 to smoothly complete the corresponding valve chamber blocking and opening.

[0045] Based on this, placing the valve core 141 and the valve ball 144 in two different chambers can effectively prevent structural interference or obstruction between the valve core 141 and the valve ball 144 during equipment operation, ensuring the linkage and adaptation effect between the two, thereby improving the control accuracy and operating efficiency of each control valve.

[0046] On the other hand, the top of the main valve body 10 is respectively provided with a low-pressure valve port 111 communicating with the low-pressure pipeline 101, a high-pressure valve port 121 communicating with the high-pressure pipeline 102, and a linkage valve port 131 connecting the low-pressure valve port 111 and the high-pressure valve port 121. The low-pressure control valve 11 is inserted into the low-pressure valve port 111, the high-pressure control valve 12 is inserted into the high-pressure valve port 121, and the linkage control valve 13 is inserted into the linkage valve port 131. Through the alignment and fitting of each valve port with the corresponding control valve, the assembly structure layout of the high-pressure shut-off valve assembly can be further optimized, the conduction and fitting effect of each control valve and the corresponding hydraulic pipeline can be improved, and the operating ends of each low-pressure control valve 11, high-pressure control valve 12, and linkage control valve 13 can be located at the top of the main valve body 10, which facilitates the operator to perform the corresponding switching control operation, thereby further reducing the operation difficulty of the high-pressure shut-off valve assembly and improving its operation efficiency and control accuracy.

[0047] Generally, the main valve body 10 has three overflow ports 109 on its side wall, each corresponding to and connected to the low-pressure valve port 111, the high-pressure valve port 121, and the linkage valve port 131. Under normal operating conditions, the sealing structures of the main valve body 10 at each of the low-pressure control valve 11, high-pressure control valve 12, and linkage control valve 13 remain stable, preventing liquid overflow. Therefore, no liquid will overflow from the overflow ports 109. However, if the sealing structure of the main valve body 10 of any control valve is damaged or malfunctions, causing liquid in the control valve and its associated pipeline to overflow through the damaged part of the control valve, this overflowed liquid will overflow from the main valve body 10 through the corresponding overflow port 109. This allows operators to determine whether the corresponding control valve has a damaged sealing structure or other structural abnormalities by observing the liquid overflowing from the overflow port 109, enabling them to quickly and accurately perform corresponding component repairs or replacements to ensure the overall stable operation of the high-pressure shut-off valve assembly.

[0048] It is easy to understand that if the low-pressure control valve 11 experiences a seal failure or structural abnormality, liquid will overflow from the corresponding overflow port 109 connected to the low-pressure valve port 111; if the high-pressure control valve 12 experiences a seal failure or structural abnormality, liquid will overflow from the corresponding overflow port 109 connected to the high-pressure valve port 121; and if the linkage control valve 13 experiences a seal failure or structural abnormality, liquid will overflow from the corresponding overflow port 109 connected to the linkage valve port 131. Matching each overflow port 109 with its corresponding valve port allows personnel to easily and intuitively identify which control valve has experienced a seal failure or structural abnormality, thereby improving the efficiency and accuracy of repairing and replacing damaged control valves.

[0049] Generally, an overflow pipe 110 is also connected downstream of the overflow port 109. The overflow pipe 110 extends generally in the vertical direction to ensure that the liquid overflowing through the overflow port 109 can be discharged smoothly and efficiently to the outside of the equipment, and to prevent the overflowing liquid from causing contamination and erosion to the external structure of the main valve body 10.

[0050] Based on this, the low-pressure inlet 103, low-pressure outlet 104, high-pressure inlet 105, and high-pressure outlet 106 are all located below the overflow outlet 109. This arrangement effectively prevents liquid from overflowing through the overflow outlet 109 during normal operation, avoiding any adverse impact on the normal flow of liquid through the low-pressure inlet 103, low-pressure outlet 104, high-pressure inlet 105, and high-pressure outlet 106. It also prevents the overflow outlet 109 from interfering with the normal flow of liquid in the low-pressure pipeline 101 and high-pressure pipeline 102, and avoids misjudging the structural damage of the control valves due to accidental liquid overflow from the overflow outlet 109. This further ensures that the overflow outlet 109 provides accurate and reliable feedback on the sealing structure damage of each control valve, making maintenance and component replacement more accurate and efficient for personnel.

[0051] In summary, the high-pressure shut-off valve assembly provided in this utility model, during normal operation, when it is necessary to maintain the flow of liquid in the hydraulic system, keeps the low-pressure control valve and the high-pressure control valve open respectively, and keeps the linkage control valve closed. At this time, the low-pressure liquid enters the low-pressure pipeline through the low-pressure inlet and then exits the low-pressure pipeline through the low-pressure outlet, so as to pass the low-pressure liquid to the downstream pressurizing mechanism for pressurization. After the pressurization is completed, the high-pressure liquid obtained enters the high-pressure pipeline through the high-pressure inlet and then exits the high-pressure pipeline through the high-pressure outlet. When maintenance or other shutdown procedures are required for the hydraulic system, the linkage control valve is opened. This instantly connects the high-pressure and low-pressure control valves, releasing pressure on the high-pressure control valve and related components in the high-pressure pipeline. Afterward, operations such as switching on / off and maintenance of the high-pressure control valve and its components can be easily performed. Once these operations are completed, simply closing the linkage control valve again isolates the low-pressure and high-pressure pipelines within the main valve body, ensuring independent conduction of the low-pressure and high-pressure pipelines and stable operation of related components during subsequent equipment operation. The high-pressure shut-off valve assembly, relying on the linkage control valve to disconnect and connect the low-pressure and high-pressure control valves, achieves mutual isolation between the low-pressure and high-pressure environments within the hydraulic system and allows for rapid pressure release when necessary. This significantly improves the efficiency and control accuracy of switching operations, particularly in the high-pressure pipelines, while effectively reducing the difficulty of switching operations and the workload of relevant personnel. Therefore, the overall switching control and operation of the high-pressure shut-off valve assembly is simpler and more efficient.

[0052] The high-pressure shut-off valve assembly provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A high-pressure shut-off valve assembly, characterized in that, Includes a main valve body, which has a low-pressure pipeline and a high-pressure pipeline inside. The outer wall of the main valve body is provided with a low-pressure inlet for low-pressure liquid to enter the low-pressure pipeline, a low-pressure outlet for low-pressure liquid to exit the low-pressure pipeline, a high-pressure inlet for high-pressure liquid to enter the high-pressure pipeline, and a high-pressure outlet for high-pressure liquid to exit the high-pressure pipeline. The main valve body is provided with a low-pressure control valve adapted to be connected to the low-pressure pipeline and a high-pressure control valve adapted to be connected to the high-pressure pipeline. The main valve body is also provided with a linkage control valve connecting the low-pressure control valve and the high-pressure control valve.

2. The high-pressure shut-off valve assembly as described in claim 1, characterized in that, The low-pressure control valve, the high-pressure control valve, and the linkage control valve are all insertion-type on / off valves. The insert-type switching valve includes a cartridge valve body with an internal valve cavity, a valve core disposed within the cartridge valve body, and a handwheel disposed on the top of the cartridge valve body and linked to the valve core. The side of the cartridge valve body has a side valve port communicating with the valve cavity, and the bottom of the cartridge valve body has a lower valve port communicating with the valve cavity. A valve ball that is linked and cooperates with the valve core is also disposed in the valve cavity. The lower valve port of the low-pressure control valve is connected to the lower valve port of the linkage control valve through a low-pressure pipe cavity located inside the main valve body, and the side valve port of the high-pressure control valve is connected to the side valve port of the linkage control valve through a high-pressure pipe cavity located inside the main valve body.

3. The high-pressure shut-off valve assembly as described in claim 2, characterized in that, The valve chamber includes a control chamber accommodating the valve core and a liquid guiding chamber accommodating the valve ball. The liquid guiding chamber is connected to the lower part of the control chamber. The liquid guiding chamber of the low-pressure control valve is connected between the low-pressure inlet and the low-pressure outlet. The liquid guiding chamber of the high-pressure control valve is connected between the high-pressure inlet and the high-pressure outlet. The liquid guiding chamber of the linkage control valve is connected between the liquid guiding chamber of the low-pressure control valve and the liquid guiding chamber of the high-pressure control valve.

4. The high-pressure shut-off valve assembly as described in claim 1, characterized in that, The top of the main valve body is respectively provided with a low-pressure valve port communicating with the low-pressure pipeline, a high-pressure valve port communicating with the high-pressure pipeline, and a linkage valve port communicating between the low-pressure valve port and the high-pressure valve port. The low-pressure control valve is inserted into the low-pressure valve port, the high-pressure control valve is inserted into the high-pressure valve port, and the linkage control valve is inserted into the linkage valve port.

5. The high-pressure shut-off valve assembly as described in claim 4, characterized in that, The main valve body has three overflow ports on its side wall, which correspond one-to-one with the low-pressure valve port, the high-pressure valve port and the linkage valve port and are interconnected with each other.

6. The high-pressure shut-off valve assembly as described in claim 5, characterized in that, The low-pressure inlet, the low-pressure outlet, the high-pressure inlet, and the high-pressure outlet are all located below the overflow outlet.

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