A control valve device and a pipe isolation bladder plugging system

Abstract

This application discloses a control valve device and a pipeline isolation bladder sealing system, relating to the field of pipeline maintenance equipment technology, and aims to solve the problem of wasted human resources during isolation bladder maintenance. The control valve device includes a gas source end, a gas supply end, a pressure relief end, a pressure detection unit, and a control valve assembly. The control valve assembly is connected between the gas source end, the gas supply end, and the pressure relief end. The control valve assembly is used to control the connection between the gas source end and the gas supply end, or between the gas supply end and the pressure relief end, based on the detection value of the pressure detection unit. When the gas pressure inside the isolation bladder is lower than a preset pressure range, the gas source end is connected to the gas supply end to increase the gas pressure inside the isolation bladder. When the gas pressure inside the isolation bladder is higher than the preset pressure range, the gas supply end is connected to the pressure relief end to decrease the gas pressure inside the isolation bladder. Therefore, no manual monitoring and adjustment of the pressure inside the isolation bladder is required, thus saving manpower.

Description

Technical Field

[0001] This application relates to the field of pipeline maintenance equipment technology, and in particular to a control valve device and a pipeline isolation bladder sealing system. Background Technology

[0002] Pipeline isolation and sealing devices are used to isolate and seal damaged pipe sections from normal pipe sections while the pipeline is pressurized and transporting goods. These devices provide a basis for maintenance work on damaged pipe sections.

[0003] In the prior art, pipeline isolation and sealing devices include isolation bladders. The isolation bladders are placed on both sides of the damaged pipe section, and gas is manually injected into the isolation bladders to make the pressure inside the bladders reach the sealing pressure value.

[0004] When performing maintenance on damaged pipe sections, it is necessary to replenish or release gas into the isolation chamber in real time based on the pressure inside to ensure the sealing effect. In existing technologies, this process is cumbersome and wastes human resources. Summary of the Invention

[0005] The purpose of this application is to provide a control valve device and a pipeline isolation bladder plugging system, which aims to solve the problem of wasted human resources during isolation bladder maintenance.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a control valve device, including a gas source end, a gas supply end, a pressure relief end, a pressure detection unit, and a control valve assembly. The gas source end is used to connect to a gas source. The gas supply end is used to connect to an isolation chamber. The pressure detection unit is adapted to detect the gas pressure inside the isolation chamber. The control valve assembly is connected between the gas source end, the gas supply end, and the pressure relief end, and is used to control the connection between the gas source end and the gas supply end, or the connection between the gas supply end and the pressure relief end, based on the detection value from the pressure detection unit.

[0008] The pressure detection unit in the control valve device provided in this application embodiment can detect the gas pressure inside the isolation bladder in real time. When the gas pressure inside the isolation bladder is lower than the preset pressure range, the control valve assembly connects the gas source end to the gas supply end, replenishing the gas inside the isolation bladder and increasing the gas pressure inside. When the gas pressure inside the isolation bladder is higher than the preset pressure range, the control valve assembly connects the gas supply end to the pressure relief end, discharging a portion of the gas inside the isolation bladder and reducing the gas pressure inside. Therefore, the gas pressure inside the isolation bladder is always kept within the preset pressure range, eliminating the need for manual monitoring and adjustment, thus saving manpower.

[0009] In some possible implementations, the control valve assembly includes a first automatic control valve, a second automatic control valve, and a control unit. The first automatic control valve is connected between the gas source and the gas supply end. The second automatic control valve is connected between the gas supply end and the pressure relief end. The control unit is connected to the first automatic control valve, the second automatic control valve, and the pressure detection unit. The control unit controls the opening and closing of the first and second automatic control valves based on the pressure detection value from the pressure detection unit.

[0010] In some possible implementations, the control valve assembly further includes a first manual control valve and a second manual control valve. The first manual control valve is connected between the gas source and the gas supply end, and is connected in series with the first automatic control valve. The second manual control valve is connected between the gas source and the gas supply end, and is connected in parallel with both the first automatic control valve and the first manual control valve.

[0011] In some possible implementations, the parallel assembly consisting of the second manual control valve, the first automatic control valve, and the first manual control valve is called the first parallel assembly. The control valve assembly also includes a pressure reducing valve. The pressure reducing valve is connected between the gas supply end and the first parallel assembly.

[0012] In some possible implementations, the control valve assembly further includes a third manual control valve. The third manual control valve is connected between the gas supply end and the pressure relief end, and is configured in series with the second automatic control valve.

[0013] In some possible implementations, the pressure relief end includes a first pressure relief end and a second pressure relief end. A second automatic control valve is connected between the gas supply end and the first pressure relief end. The control valve assembly also includes a fourth manual control valve, which is located between the gas supply end and the second pressure relief end.

[0014] In some possible implementations, the control valve device further includes a first connecting device. The first connecting device includes a first port, a second port, a third port, and a fourth port that are interconnected. A first automatic control valve is connected between the gas source and the first port, the second port is connected to the gas supply, a second automatic control valve is connected between the third port and the first pressure relief port, and a fourth manual control valve is connected between the fourth port and the second pressure relief valve.

[0015] In some possible implementations, the control valve assembly further includes a fifth manual control valve. The fifth manual control valve is connected between the second port and the gas supply port.

[0016] In some possible implementations, the control valve device further includes a second communication device comprising a fifth port, a sixth port, and a seventh port that are interconnected. The fifth port is connected to the second port, the sixth port is connected to the air supply end, and the seventh port is connected to the pressure detection unit.

[0017] In some possible implementations, the second connecting device is connected in series with the fifth manual control valve and is located between the fifth manual control valve and the gas supply end.

[0018] Secondly, this application also provides a pipeline isolation bladder sealing system. The pipeline isolation bladder sealing system includes a gas source, an isolation bladder, and a control valve device provided in any of the embodiments of the first aspect. The gas source end of the control valve device is connected to the gas source, and the gas supply end of the control valve device is connected to the isolation bladder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a pipeline isolation bladder sealing system provided in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the inflation state of a pipeline isolation bladder sealing system provided in one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the depressurization state of a pipeline isolation bladder sealing system provided in one embodiment of this application;

[0023] Figure 4 for Figure 2 A schematic diagram of the inflation process of the pipeline isolation bladder sealing system under fault conditions;

[0024] Figure 5 for Figure 3 A schematic diagram of pressure relief under fault conditions of the provided pipeline isolation bladder sealing system.

[0025] Figure label:

[0026] 100 - Control valve device;

[0027] 1-Gas source end; 2-Gas supply end; 3-Pressure relief end; 31-First pressure relief end; 32-Second pressure relief end; 4-Pressure detection unit; 5-Control valve assembly;

[0028] 51-First automatic control valve; 52-Second automatic control valve; 53-First manual control valve; 54-Second manual control valve; 55-Pressure reducing valve; 56-Third manual control valve; 57-Fourth manual control valve; 58-Fifth manual control valve; 501-First connecting device; 502-Second connecting device;

[0029] 200-Pipeline Isolation Bag Sealing System;

[0030] 01-Gas source; 02-Isolation capsule. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "third," "fourth," "fifth," "sixth," or "seventh" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" 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, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In embodiments of this application, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus.

[0035] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0036] like Figure 1 As shown, this application provides a pipeline isolation bladder sealing system 200. The pipeline isolation bladder sealing system 200 includes an air source 01, an isolation bladder 02, and a control valve device 100. The air source end 1 of the control valve device 100 is connected to the air source 01, and the air supply end 2 of the control valve device 100 is connected to the isolation bladder 02.

[0037] For example, the gas in gas source 01 includes, but is not limited to, nitrogen, argon, helium, neon, carbon dioxide, and mixed air.

[0038] For example, the volume of the isolation bladder 02 is variable. When gas is filled into the isolation bladder 02, the volume of the isolation bladder 02 increases, and when gas is discharged from the isolation bladder 02, the volume of the isolation bladder 02 decreases.

[0039] For example, the isolation bladder 02 is made of rubber.

[0040] It should be noted that when the isolation bladder 02 is placed inside the pipeline and gas is introduced into it, the isolation bladder 02 expands in volume and along the direction of the pipeline extension. A portion of the isolation bladder 02 fits tightly against the inner wall of the pipeline to seal it, thereby sealing the pipeline.

[0041] When in use, place the isolation bladder 02 upstream and downstream of the damaged pipe section, and fill the isolation bladder 02 with gas through the gas source 01, so that the isolation bladder 02 fits tightly against the inner wall of the normal pipe section upstream and downstream of the damaged pipe section, thereby temporarily blocking the pipeline.

[0042] During the temporary sealing of the pipeline, after depressurizing and emptying the medium in the damaged pipe section, the damaged pipe section can be cut and replaced.

[0043] See also Figure 1 This application also provides a control valve device 100, including an air source end 1, an air supply end 2, a pressure relief end 3, a pressure detection unit 4, and a control valve assembly 5.

[0044] Among them, gas source end 1 is used to connect to gas source 01. Gas supply end 2 is used to connect to isolation bladder 02. Pressure relief end 3 is connected to the outside of the device.

[0045] In one scenario, after the isolation capsule 02 is installed, the air pressure inside the isolation capsule 02 changes due to the ambient temperature. If the air pressure inside the isolation capsule 02 is too high, it will cause the isolation capsule 02 to rupture, while if the air pressure inside the isolation capsule 02 is insufficient, it will not be able to effectively block and seal the pipeline.

[0046] Therefore, it is necessary to monitor the air pressure inside the isolation bladder 02 in real time and make corresponding adjustments based on changes in air pressure.

[0047] The pressure detection unit 4 is suitable for detecting the gas pressure inside the isolation bladder 02.

[0048] The control valve assembly 5 is connected between the gas source end 1, the gas supply end 2 and the pressure relief end 3. The control valve assembly 5 is used to control the gas source end 1 to connect with the gas supply end 2, or to control the gas supply end 2 to connect with the pressure relief end 3, according to the detection value of the pressure detection unit 4.

[0049] The control valve assembly 5 is connected to the pressure detection unit 4, which transmits the detected gas pressure inside the isolation bladder 02 to the control assembly.

[0050] When the gas pressure inside the isolation bladder 02 is lower than the preset pressure range, the control valve assembly 5 controls the gas source end 1 to connect with the gas supply end 2, and the gas source 01 replenishes the gas inside the isolation bladder 02, increasing the gas pressure inside the isolation bladder 02 and maintaining a tight fit between the isolation bladder 02 and the inner wall of the pipeline.

[0051] When the gas pressure inside the isolation bladder 02 exceeds the preset pressure range, the control valve assembly 5 connects the gas supply end 2 to the pressure relief end 3. The isolation bladder 02 then releases a portion of the gas through the pressure relief end 3, thereby reducing the gas pressure inside the isolation bladder 02. This ensures that the gas pressure inside the isolation bladder 02 remains within the preset pressure range, eliminating the need for manual monitoring and adjustment, thus saving manpower and improving operational efficiency. Furthermore, it reduces the risk of human error, enhancing the safety and reliability of the entire maintenance operation.

[0052] The embodiments of this application will be described in detail below with reference to the accompanying drawings, and the application scenarios of the embodiments of this application will be introduced first before the detailed description of the embodiments of this application.

[0053] When a pipeline transporting hazardous gases or liquids is damaged, it is inconvenient to stop transport due to reasons such as industrial production and energy supply security. Therefore, it is necessary to seal and isolate the damaged section from the normal section while the pipeline is pressurized and transporting the gas or liquid, so as to carry out maintenance work on the damaged section.

[0054] The control valve device 100 provided in this application can be applied to the pipeline isolation bladder sealing system 200.

[0055] The pipeline isolation bladder sealing system 200 provided in this application is used in the fields of petrochemical, municipal engineering, power, marine engineering and metallurgy.

[0056] Specifically, in the petrochemical field, the pipeline isolation capsule sealing system 200 provided in this application is used for sealing operations of pipelines such as crude oil extraction and transportation pipelines, pipelines transporting chemical raw materials (corrosive or toxic liquids or gases such as sulfuric acid, caustic soda, and benzene), and natural gas pipelines.

[0057] In the field of municipal engineering, the pipeline isolation capsule sealing system 200 provided in this application can be used for sealing operations of pipelines such as water supply pipelines, sewage pipelines, and heating pipelines.

[0058] In the power industry, the pipeline isolation capsule sealing system 200 provided in this application can be used for sealing operations of pipelines such as circulating water pipelines and fuel oil pipelines.

[0059] In the metallurgical field, the pipeline isolation capsule sealing system 200 provided in this application can be used for pipeline sealing operations for the transportation of various gases (oxygen, carbon monoxide, coal gas, etc.).

[0060] For example, the preset pressure range includes, but is not limited to, the following: 0.05 MPa ≤ preset pressure range ≤ 0.1 MPa, 0.05 MPa ≤ preset pressure range ≤ 0.09 MPa, 0.05 MPa ≤ preset pressure range ≤ 0.08 MPa, 0.05 MPa ≤ preset pressure range ≤ 0.07 MPa, 0.06 MPa ≤ preset pressure range ≤ 0.1 MPa, and 0.07 MPa ≤ preset pressure range ≤ 0.1 MPa.

[0061] It should be noted that the minimum and maximum values ​​of the preset pressure range can be set according to actual usage conditions.

[0062] like Figure 2 and Figure 3 As shown, in some possible embodiments, the control valve assembly 5 includes a first automatic control valve 51, a second automatic control valve 52, and a control unit. The first automatic control valve 51 is connected between the gas source end 1 and the gas supply end 2. The second automatic control valve 52 is connected between the gas supply end 2 and the pressure relief end 3. The control unit is connected to the first automatic control valve 51, the second automatic control valve 52, and the pressure detection unit 4. The control unit controls the opening and closing of the first automatic control valve 51 and the second automatic control valve 52 based on the detection value from the pressure detection unit 4.

[0063] For example, the connection methods between the control unit and the first automatic control valve 51, between the control unit and the second automatic control valve 52, and between the control unit and the pressure detection unit 4 include, but are not limited to, electrical connection and wireless communication connection.

[0064] The control unit receives the pressure data inside the isolation bladder 02 and compares the pressure value inside the isolation bladder 02 with the preset pressure range to determine whether the gas pressure inside the isolation bladder 02 is within the preset range.

[0065] When the pressure falls below a preset range, the control unit sends a signal to open the first automatic control valve 51, connecting the gas source 1 and the gas supply 2, allowing the gas source 01 to replenish gas into the isolation bladder 02, thereby increasing the air pressure inside the isolation bladder 02. During this process, the control unit controls the second automatic control valve 52 to close.

[0066] When the pressure exceeds the preset range, the control unit sends a signal to open the second automatic control valve 52, connecting the gas supply end 2 and the pressure relief end 3, allowing the gas inside the isolation bladder 02 to be discharged to the outside through the pressure relief end 3, thereby reducing the gas pressure inside the isolation bladder 02. During this process, the control unit controls the first automatic control valve 51 to close.

[0067] In this way, the gas pressure inside the isolation bladder 02 is automatically regulated through the cooperation of the control unit and the automatic control valve, without the need for manual intervention, thus saving manpower.

[0068] like Figure 4 As shown, in some possible embodiments, the control valve assembly 5 further includes a first manual control valve 53. The first manual control valve 53 is connected between the gas source end 1 and the gas supply end 2, and is connected in series with the first automatic control valve 51.

[0069] The first manual control valve 53 and the first automatic control valve 51 are connected in series. When gas flows from the gas source 1 to the gas supply 2, it passes through the first manual control valve 53 and the first automatic control valve 51 in sequence. The operator can manually close or adjust the first manual control valve 53 to intervene in the gas flow rate at any time. When the first automatic control valve 51 fails to close, the operator can intervene through the first manual control valve 53 to control the gas flow rate.

[0070] Thus, by setting the first manual control valve 53, the flexibility and safety of the control valve assembly 5 can be increased, thereby increasing the flexibility and safety of the pipeline isolation bladder sealing system 200.

[0071] See also Figure 4 In some possible implementations, the control valve assembly 5 further includes a second manual control valve 54. The second manual control valve 54 is connected between the gas source end 1 and the gas supply end 2, and is arranged in parallel with the first automatic control valve 51 and the first manual control valve 53.

[0072] When the first automatic control valve 51 fails to open, gas cannot flow from the gas source 1 to the gas supply 2. By opening the second manual control valve 54, gas can flow directly to the gas supply 2, bypassing the first automatic control valve 51 and the first manual control valve 53. In this case, the pressure inside the isolation bladder 02 can be regulated through the second manual control valve 54.

[0073] This increases the safety of the control valve assembly 5, and consequently increases the safety of the pipeline isolation bladder sealing system 200.

[0074] When the first automatic control valve 51 is operating normally, the first manual control valve 53 is normally open, and the second manual control valve 54 is normally closed. The operator can also open the second manual control valve 54 to accelerate the flow of gas from the gas source 1 to the gas supply 2.

[0075] In some possible implementations, see [link to relevant documentation]. Figure 4The parallel assembly consisting of the second manual control valve 54, the first automatic control valve 51, and the first manual control valve 53 is the first parallel assembly. The control valve assembly 5 also includes a pressure reducing valve 55. The pressure reducing valve 55 is connected between the gas source end 1 and the first parallel assembly.

[0076] Pressure reducing valve 55 is used to regulate the high-pressure gas from gas source 1 to a stable pressure range that is lower than the internal output pressure of gas source 01.

[0077] Pressure reducing valve 55 ensures that the gas pressure entering isolation bladder 02 is always within a safe range, protecting isolation bladder 02 from excessive pressure and extending its service life. Pressure reducing valve 55 works in conjunction with automatic and manual control valves to provide multi-level protection, ensuring stable system operation under various conditions.

[0078] For example, the pressure reducing valve 55 may also be connected between the gas supply end 2 and the first parallel assembly.

[0079] like Figure 5 As shown, in some possible embodiments, the control valve assembly 5 further includes a third manual control valve 56. The third manual control valve 56 is connected between the gas supply end 2 and the pressure relief end 3, and is connected in series with the second automatic control valve 52.

[0080] The third manual control valve 56 is connected in series with the second automatic control valve 52. When gas flows from the isolation chamber 02 to the pressure relief end 3, it passes through the third manual control valve 56 and the second automatic control valve 52 in sequence. The operator can manually close or adjust the third manual control valve 56 to intervene in the gas flow rate at any time. When the second automatic control valve 52 fails to close, the operator can intervene through the third manual control valve 56 to control the gas flow rate.

[0081] Thus, by setting a third manual control valve 56, the flexibility and safety of the control valve assembly 5 can be increased, thereby increasing the flexibility and safety of the pipeline isolation bladder sealing system 200.

[0082] In some possible implementations, see [link to relevant documentation]. Figure 5 As shown, the control valve assembly 5 also includes a fourth manual control valve 57, which is connected between the gas supply end 2 and the pressure relief end 3, and is arranged in parallel with the second automatic control valve 52 and the third manual control valve 56.

[0083] In some possible implementations, the pressure relief end 3 includes a first pressure relief end 31 and a second pressure relief end 32. A second automatic control valve 52 is connected between the gas supply end 2 and the first pressure relief end 31. The control valve assembly 5 also includes a fourth manual control valve 57, which is located between the gas supply end 2 and the second pressure relief end 32.

[0084] When the second automatic control valve 52 malfunctions and cannot open normally, causing the first pressure relief end 31 to malfunction, the fourth manual control valve 57 can serve as a backup channel, allowing the gas in the isolation bladder 02 to be discharged through the second pressure relief end 32.

[0085] Thus, even if the second automatic control component fails, the air pressure inside the isolation bladder 02 can still be regulated through the fourth manual control valve 57 and the second pressure relief end 32, maintaining the normal operation of the system. This improves the flexibility and safety of the control valve assembly 5, and consequently enhances the flexibility and safety of the pipeline isolation bladder sealing system 200.

[0086] See also some possible implementations. Figures 1 to 5 In any of the accompanying drawings, the control valve device 100 further includes a first connecting device 501. The first connecting device 501 includes a first port, a second port, a third port, and a fourth port that are interconnected. A first automatic control valve 51 is connected between the gas source end 1 and the first port, the second port is connected to the gas supply end 2, a second automatic control valve 52 is connected between the third port and the first pressure relief end 31, and a fourth manual control valve 57 is connected between the fourth port and the second pressure relief valve.

[0087] The first connecting device 501 is connected to the gas source 1 through the first port and to the gas supply 2 through the second port, which serves to guide the gas from the gas source 01 to the gas supply 2, realizing the basic connection of the gas path and ensuring that the gas can be smoothly transmitted from the gas source 01 to the part that needs to be supplied with gas.

[0088] Meanwhile, the first connecting device 501 can distribute gas to different gas paths according to different needs, so that different components in the system can obtain gas supply at appropriate times and under appropriate conditions, thus meeting the diverse working requirements of the system.

[0089] In some possible implementations, the first connecting device 501 may not be provided, and the gas source end 1, the gas supply end 2, and the pressure relief end 3 may be connected by a pipeline.

[0090] See also some possible implementations. Figures 1 to 5 In any of the accompanying drawings, the control valve assembly 5 also includes a fifth manual control valve 58. The fifth manual control valve 58 is connected between the second port and the air supply end 2.

[0091] After closing the fifth manual control valve 58, the air path between the air source 01 and the isolation bladder 02 can be cut off, thus separating the pipeline where the isolation bladder 02 is located from the air source 01.

[0092] When the first automatic control valve 51 or the second automatic control valve 52 malfunctions, and the pipeline isolation bladder sealing system 200 is in operation, closing the fifth manual control valve 58 stabilizes the total gas volume in the isolation bladder 02 and releases the gas from the control valve device 100. This reduces the pressure within the device, making it easier for maintenance personnel to inspect and troubleshoot the control valve device 100.

[0093] In some possible implementations, the control valve device 100 further includes a second communication device 502, which includes a fifth port, a sixth port, and a seventh port that are interconnected. The fifth port is connected to the second port, the sixth port is connected to the air supply end 2, and the seventh port is connected to the pressure detection unit 4.

[0094] The fifth port of the second connecting device 502 is connected to the second port of the first connecting device 501, and the sixth port is connected to the gas supply end 2. This allows gas to be smoothly transmitted from the gas source 01 to the gas supply end 2 after passing through the first connecting device 501, thereby supplying gas to the isolation bladder 02. The second connecting device 502 enables continuous gas flow from the gas source 01 to the isolation bladder 02, ensuring the normal operation of the pipeline isolation bladder sealing system 200.

[0095] The seventh port of the second connecting device 502 provides a stable connection port for the pressure detection unit 4, reducing the interference of external factors on pressure detection.

[0096] The seventh port is connected to the pressure detection unit 4, enabling the pressure detection unit 4 to directly acquire the gas pressure information from the gas supply end 2. Through the relay of the second communication device 502, the pressure detection unit 4 can accurately and timely sense the pressure changes inside the isolation bladder 02.

[0097] See also some possible implementations. Figures 1 to 5 In any of the attached figures, the second connecting device 502 is connected in series with the fifth manual control valve 58 and is located between the fifth manual control valve 58 and the gas supply end 2.

[0098] The second communication device 502 is located between the fifth manual control valve 58 and the air supply end 2, so that the pressure detection unit 4 connected to one of the ports of the second communication device 502 can continuously detect the air pressure inside the isolation bladder 02.

[0099] In some possible implementations, the second connecting device 502 is connected in series with the fifth manual control valve 58 and is located between the fifth manual control valve 58 and the first connecting device 501.

[0100] The second connecting device 502 is located between the fifth manual control valve 58 and the first connecting device 501. When the fifth manual control valve 58 is open, the pressure detection unit 4, connected to one port of the second connecting device 502, detects the air pressure inside the isolation bladder 02. When the fifth manual control valve 58 is closed, the pressure detection unit 4, connected to one port of the second connecting device 502, detects the air pressure inside the first connecting device 501.

[0101] For example, the automatic control valves provided in this application include, but are not limited to: electric control valves, pneumatic control valves, hydraulic control valves, solenoid control valves, on / off valves, regulating valves, butterfly valves, ball valves, gate valves, globe valves, diaphragm valves, and proportional control valves.

[0102] For example, the manual control valves provided in this application include, but are not limited to: handwheel control valves, handle control valves, lever control valves, on / off valves, regulating valves, butterfly valves, ball valves, gate valves, globe valves, diaphragm valves, and proportional control valves.

[0103] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control valve device (100) characterized by, include: Gas source end (1), used to connect to gas source (01); Gas supply end (2), used to connect to isolation bag (02); Pressure relief end (3); Pressure detection unit (4), adapted to detect the gas pressure inside the isolation bladder (02); and, A control valve assembly (5) is connected between the gas source end (1), the gas supply end (2) and the pressure relief end (3). The control valve assembly (5) is used to control the gas source end (1) to connect with the gas supply end (2) or to control the gas supply end (2) to connect with the pressure relief end (3) according to the detection value of the pressure detection unit (4).

2. The control valve device (100) according to claim 1, characterized in that The control valve assembly (5) includes: The first automatic control valve (51) is connected between the gas source end (1) and the gas supply end (2); A second automatic control valve (52) is connected between the gas supply end (2) and the pressure relief end (3); and, The control unit is connected to the first automatic control valve (51), the second automatic control valve (52), and the pressure detection unit (4). The control unit is used to control the opening and closing of the first automatic control valve (51) and the second automatic control valve (52) according to the detection value of the pressure detection unit (4).

3. The control valve device (100) according to claim 2, characterized in that The control valve assembly (5) also includes: The first manual control valve (53) is connected between the gas source end (1) and the gas supply end (2) and is connected in series with the first automatic control valve (51); The second manual control valve (54) is connected between the gas source end (1) and the gas supply end (2), and is arranged in parallel with the first automatic control valve (51) and the first manual control valve (53).

4. The control valve device (100) according to claim 3, characterized in that The parallel assembly formed by the second manual control valve (54), the first automatic control valve (51), and the first manual control valve (53) is the first parallel assembly; The control valve assembly (5) also includes: A pressure reducing valve (55) is connected between the gas source end (1) and the first parallel component.

5. The control valve device (100) according to claim 2, characterized in that The control valve assembly (5) also includes: The third manual control valve (56) is connected between the gas supply end (2) and the pressure relief end (3), and is connected in series with the second automatic control valve (52).

6. The control valve device (100) according to claim 2, characterized in that The pressure relief end (3) includes a first pressure relief end (31) and a second pressure relief end (32); The second automatic control valve (52) is connected between the gas supply end (2) and the first pressure relief end (31); The control valve assembly (5) also includes: The fourth manual control valve (57) is located between the gas supply end (2) and the second pressure relief end (32).

7. The control valve device (100) according to claim 6, characterized in that The control valve device (100) further includes: The first connecting device (501) includes a first port, a second port, a third port and a fourth port that are interconnected. The first automatic control valve (51) is connected between the gas source end (1) and the first port, the second port is connected to the gas supply end (2), the second automatic control valve (52) is connected between the third port and the first pressure relief end (31), and the fourth manual control valve (57) is connected between the fourth port and the second pressure relief valve.

8. The control valve device (100) according to claim 7, characterized in that The control valve assembly (5) also includes: The fifth manual control valve (58) is connected between the second port and the gas supply end (2).

9. The control valve device (100) according to claim 8, characterized in that Also includes: The second communication device (502) includes a fifth port, a sixth port and a seventh port that are interconnected. The fifth port is connected to the second port, and the sixth port is connected to the gas supply end (2). The pressure detection unit (4) is connected to the seventh port.

10. The control valve device (100) according to claim 9, characterized in that, The second connecting device (502) is connected in series with the fifth manual control valve (58) and is located between the fifth manual control valve (58) and the gas supply end (2).

11. A pipeline isolation bladder sealing system (200), characterized in that, include: Gas source (01); Isolation capsule (02); The control valve device (100) according to any one of claims 1-10, wherein the air source end (1) of the control valve device (100) is connected to the air source (01), and the air supply end (2) of the control valve device (100) is connected to the isolation bag (02).

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