Valve internal leakage verification device

Abstract

The utility model relates to the technical field of valve pipelines, and provides a valve inner leakage checking device, which comprises a main pipeline, a gas inlet branch and a checking host, and is characterized in that the main pipeline comprises a valve to be detected and a gas detection part, and the gas detection part is arranged between the valve to be detected and an outlet of the main pipeline; a gas release assembly is arranged at an inlet of the gas inlet branch, an outlet of the gas inlet branch is arranged between an inlet of the main pipeline and the valve to be detected, the gas release assembly is used for providing tracer gas for the gas inlet branch, and the tracer gas corresponds to the gas detection component; and the verification host is electrically connected with the gas detection part and is used for identifying the tracer gas through the gas detection part. According to the valve internal leakage checking device provided by the utility model, the gas inlet branch and the gas release assembly are communicated on the process pipeline, and the gas detection part is arranged between the valve to be detected and the outlet of the main pipeline, so that a complicated disassembly and assembly process can be omitted, and the checking efficiency and accuracy of the valve to be detected are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve pipelines, in particular to a valve internal leakage checking device. Background Art

[0002] Valve internal leakage refers to whether the medium in front of the valve on the process pipeline can flow out through the valve after the valve is closed. If the medium flows out, it means that the valve is leaking. In the prior art, for the internal leakage check of the valve, the valve on the process pipeline is generally removed, and the valve is tested for leakage by one-way pressure in the laboratory or testing workshop. However, after the removal, the process pipeline needs to be shut down, affecting the process production; if a non-disassembly method is used, the pressure method or ultrasonic detection method is generally used. The errors of these two methods are large. For smaller internal leakage or abnormal vibration of the valve, this type of method cannot be used. Utility Model Content

[0003] The utility model provides a valve internal leakage calibration device to solve the defects of valve internal leakage calibration in the prior art. By connecting an air intake branch and a gas release component on a process pipeline and arranging a gas detection component between the valve to be tested and the outlet of the main pipeline, the valve to be tested can be calibrated at any time without affecting the normal operation of the process pipeline, eliminating the complicated disassembly and assembly process, and can greatly improve the calibration efficiency of the valve to be tested and the accuracy of the calibration result.

[0004] The valve internal leakage detection device provided by the utility model comprises:

[0005] A main pipeline, comprising a valve to be tested and a gas detection component, wherein the gas detection component is arranged between the valve to be tested and an outlet of the main pipeline;

[0006] An air intake branch, wherein a gas release assembly is provided at the inlet of the air intake branch, and an outlet of the air intake branch is provided between the inlet of the main pipeline and the valve to be tested, and the gas release assembly is used to provide a tracer gas for the air intake branch, and the tracer gas corresponds to the gas detection component;

[0007] A verification host is electrically connected to the gas detection component, and the verification host is used to identify the tracer gas through the gas detection component.

[0008] The utility model provides a valve internal leakage calibration device, wherein the gas release component comprises a nitrogen release component and a hydrogen release component, and the nitrogen release component and the hydrogen release component are arranged in parallel at the inlet of the intake branch; the nitrogen release component is used to provide nitrogen to the intake branch, and the hydrogen release component is used to provide hydrogen to the intake branch, and the tracer gas is a mixed gas of nitrogen and hydrogen.

[0009] The utility model provides a valve internal leakage calibration device, wherein the gas release assembly also includes a helium release component, the helium release component, the nitrogen release component and the hydrogen release component are arranged in parallel at the inlet of the intake branch, the nitrogen release component is used to provide nitrogen to the intake branch, the tracer gas is a mixed gas of nitrogen, hydrogen and helium, or the tracer gas is nitrogen.

[0010] The valve internal leakage test device provided by the utility model, the nitrogen release component includes a nitrogen bottle and a nitrogen flow regulator, the nitrogen bottle is arranged at the inlet of the intake branch, and the nitrogen flow regulator is arranged between the nitrogen bottle and the inlet of the intake branch;

[0011] The hydrogen release component comprises a hydrogen bottle and a hydrogen flow regulating member, wherein the hydrogen bottle is arranged at the inlet of the air intake branch, and the hydrogen flow regulating member is arranged between the hydrogen bottle and the inlet of the air intake branch;

[0012] The helium release component comprises a helium cylinder and a helium flow regulator. The helium cylinder is arranged at the inlet of the air intake branch, and the helium flow regulator is arranged between the helium cylinder and the inlet of the air intake branch.

[0013] The utility model provides a valve internal leakage checking device, wherein the air intake branch is provided with a flow regulating valve, the flow regulating valve is located between the gas release component and the outlet of the air intake branch, and the flow regulating valve is used to control the flow of the tracer gas.

[0014] The utility model provides a valve internal leakage checking device, wherein the air intake branch is further provided with a check valve, wherein the check valve is located between the flow regulating valve and the outlet of the air intake branch, and the check valve is used to limit the fluid in the main pipeline from entering the air intake branch.

[0015] The utility model provides a valve internal leakage test device, wherein the main pipeline also includes a main pressure detection component, the main pressure detection component is arranged between the inlet of the main pipeline and the valve to be tested, and the main pressure detection component is used to detect the fluid pressure in the main pipeline.

[0016] The valve internal leakage checking device provided by the utility model is characterized in that the air intake branch is further provided with an auxiliary pressure detection component, the auxiliary pressure detection component is located between the flow regulating valve and the outlet of the air intake branch, and the auxiliary pressure detection component is used to detect the pressure of the tracer gas in the air intake branch.

[0017] The utility model provides a valve internal leakage detection device, wherein the detection host comprises:

[0018] a control module, electrically connected to the main pressure detection component, the gas detection component, the gas release component, the flow control valve and the auxiliary pressure detection component, respectively, and used to control the main pressure detection component, the gas detection component, the gas release component, the flow control valve and the auxiliary pressure detection component to perform corresponding operations respectively;

[0019] A data recording module is electrically connected to the control module, and is used to record the fluid pressure in the main pipeline, the gas concentration information of the tracer gas, and the fluid temperature in the main pipeline.

[0020] The valve internal leakage calibration device provided by the utility model, the calibration host also includes a wireless module, the wireless module is electrically connected to the control module and the data recording module respectively, and the wireless module is used to wirelessly connect to the remote control terminal.

[0021] The valve internal leakage verification device provided by the embodiment of the utility model is configured with a gas detection component between the valve to be tested and the outlet of the main pipeline, and a tracer gas is introduced into the main pipeline through a gas release assembly and an air intake branch to pressurize the branch. In this way, as the tracer gas increases, the fluid pressure in the main pipeline will gradually increase. If the valve to be tested has an internal leakage problem, the gas detection component between the valve to be tested and the outlet of the main pipeline can identify the gas to be tested, and then the verification host can determine that the valve to be tested has an internal leakage problem. The valve internal leakage verification device provided by the embodiment of the utility model can be installed for a long time on a process pipeline that requires high-frequency detection of valve internal leakage, such as a process pipeline that is calibrated once every six months or one year. The valve internal leakage verification device provided by the utility model does not need to be repeatedly disassembled and assembled, and can be tested whenever needed, and can complete the valve internal leakage verification conveniently, quickly and accurately within the specified time.

[0022] Compared with the prior art, the safety valve calibration device provided in the embodiment of the utility model connects the air intake branch and the gas release component on the process pipeline, and sets a gas detection component between the valve to be tested and the outlet of the main pipeline. In this way, the valve to be tested can be calibrated at any time without affecting the normal operation of the process pipeline, eliminating the complicated disassembly and assembly process, greatly improving the calibration efficiency of the valve to be tested, and improving the safety during the calibration process and the accuracy of the calibration results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of a valve internal leakage testing device provided by an embodiment of the utility model.

[0025] Figure 2 It is a schematic diagram of a remote control terminal provided by an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100: main line; 110: valve to be tested; 120: gas detection component; 130: main pressure detection component; 200: air intake branch; 210: gas release assembly; 211: nitrogen release component; 2111: nitrogen cylinder; 2112: nitrogen flow regulating component; 212: hydrogen release component; 2121: hydrogen cylinder; 2122: hydrogen flow regulating component; 213: helium release component; 2131: helium cylinder; 2132: helium flow regulating component; 220: flow regulating valve; 230: check valve; 240: auxiliary pressure detection component. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Figure 1 It is a schematic diagram of the overall structure of a valve internal leakage test device provided in an embodiment of the utility model.

[0033] See also Figure 1 The embodiment of the utility model provides a valve internal leakage calibration device, which includes a main line 100, an air intake branch line 200 and a calibration host. The main line 100 includes a valve to be tested 110 and a gas detection component 120. The gas detection component 120 is arranged between the valve to be tested 110 and the outlet of the main line 100. In other words, the gas detection component 120 is arranged on the outlet side of the valve to be tested 110, and the gas detection component 120 needs to be arranged at a position D which is ten times the distance from the valve to be tested 110, where D refers to the pipe diameter of the main line 100.

[0034] A gas release assembly 210 is provided at the inlet of the air intake branch 200, and the outlet of the air intake branch 200 is arranged between the inlet of the main line 100 and the valve to be tested 110. Specifically, the junction of the air intake branch 200 and the main line 100 needs to be at a distance of not less than five times D from the valve to be tested 110, wherein D refers to the pipe diameter of the main line 100. The gas release assembly 210 is used to provide a tracer gas for the air intake branch 200, and the tracer gas corresponds to the gas detection component 120, which can specifically be a gas detection sensor corresponding to the tracer gas.

[0035] In the embodiment of the utility model, when it is necessary to calibrate the valve 110 to be tested, the process medium can flow normally in the main pipeline 100. Specifically, the gas release component 210 releases the tracer gas, and the tracer gas enters the main pipeline 100 through the air inlet branch 200 and mixes with the process medium. As the tracer gas increases, the fluid pressure in the main pipeline 100 increases. If there is an internal leakage in the valve 110 to be tested, the tracer gas can enter the outlet side of the valve 110 to be tested through the valve 110 to be tested, that is, enter between the valve 110 to be tested and the outlet of the main pipeline 100. At this time, the gas detection component 120 located between the valve 110 to be tested and the outlet of the main pipeline 100 can detect the tracer gas.

[0036] The verification host is electrically connected to the gas detection component 120. The verification host can identify the tracer gas through the gas detection component 120. Specifically, the presence of the tracer gas can be identified by detecting the concentration of the tracer gas. When the tracer gas is identified, the verification host can judge and determine that the current valve 110 to be tested has an internal leakage phenomenon.

[0037] See also Figure 1 It can be understood that the valve internal leakage verification device provided by the embodiment of the utility model is provided with a gas detection component 120 between the valve to be tested 110 and the outlet of the main pipeline 100, and a tracer gas is introduced into the main pipeline 100 through the gas release component 210 and the air inlet branch 200 to perform branch pressurization. In this way, as the tracer gas increases, the fluid pressure in the main pipeline 100 will gradually increase. If the valve to be tested 110 has an internal leakage problem, the gas detection component 120 located between the valve to be tested 110 and the outlet of the main pipeline 100 can identify the gas to be tested, and then the verification host can determine that the valve to be tested 110 has an internal leakage problem. The valve internal leakage verification device provided by the embodiment of the utility model can be installed for a long time on a process pipeline that needs to detect valve internal leakage at a high frequency, such as a process pipeline that is verified once every six months or one year. The valve internal leakage verification device provided by the utility model does not need to be repeatedly disassembled and assembled, and can be tested whenever it is used, and can complete the valve internal leakage verification conveniently, quickly and accurately within the specified time.

[0038] Compared with the prior art, the safety valve calibration device provided in the embodiment of the utility model connects the air intake branch 200 and the gas release assembly 210 on the process pipeline, and sets a gas detection component 120 between the valve to be tested 110 and the outlet of the main pipeline 100. In this way, the valve to be tested 110 can be calibrated at any time without affecting the normal operation of the process pipeline, eliminating the complicated disassembly and assembly process, which can greatly improve the calibration efficiency of the valve to be tested 110, and can improve the safety during the calibration process and the accuracy of the calibration results.

[0039] Continue reading Figure 1 In an optional embodiment of the utility model, the gas release component 210 includes a nitrogen release component 211 and a hydrogen release component 212. The nitrogen release component 211 and the hydrogen release component 212 are arranged in parallel at the inlet of the intake branch 200. The nitrogen release component 211 is used to provide nitrogen to the intake branch 200, and the hydrogen release component 212 is used to provide hydrogen to the intake branch 200. That is, in the embodiment of the utility model, the tracer gas is a mixed gas of nitrogen and hydrogen; accordingly, the gas detection component 120 includes a hydrogen detection sensor for identifying hydrogen. Specifically, when the valve 110 to be tested is tested for internal leakage, the valve 110 to be tested must be closed first, and then the tracer gas must be injected into the main pipeline 100 through the intake branch 200. The hydrogen detection sensor is used to detect whether there is tracer gas passing through the sealing surface of the valve and entering the downstream pipeline. When the concentration of hydrogen is not 0, it indicates that the valve 110 to be tested has internal leakage.

[0040] It should be noted that since hydrogen is a flammable and explosive gas, the proportion of hydrogen needs to be adjusted to less than 20% of its lower explosion limit, that is, the proportion of hydrogen is less than 5%; nitrogen is generally used as the main carrier gas to dilute and reduce the proportion of hydrogen, reducing the proportion of hydrogen to less than 5% to fully ensure the safety of the detection process.

[0041] Continue reading Figure 1 It is understandable that the content of hydrogen in natural air is relatively low. In the embodiment of the utility model, a hydrogen release component 212 and a nitrogen release component 211 are provided to provide a mixed gas of hydrogen and nitrogen as a tracer gas. In this way, compared with traditional valve internal leakage detection methods, such as pressure difference method, ultrasonic method and other technologies, since nitrogen and hydrogen are combined into a tracer gas, the anti-interference ability is strong, the detection precision and accuracy can be greatly improved, and the common misjudgment problem in valve internal leakage detection can be effectively reduced.

[0042] Continuing to refer to 1, in an optional embodiment of the present invention, the gas release assembly 210 further includes a helium release component 213. The helium release component 213, the nitrogen release component 211 and the hydrogen release component 212 are arranged in parallel at the inlet of the air intake branch 200. The helium release component 213 is used to provide helium to the air intake branch 200, that is, the tracer gas in this embodiment is helium; in an optional embodiment of the present invention, the tracer gas can also be a mixture of hydrogen, helium and nitrogen. The proportion of helium is generally determined according to the type of medium in the main pipeline 100 or the accuracy of the detection. When helium is not needed, the helium flow regulating valve 2132 can be closed; accordingly, the gas detection component 120 needs to include a hydrogen detection sensor and a helium detection sensor for identifying hydrogen and helium.

[0043] It can be understood that in the embodiment of the utility model, the tracer gas has three optional compositions, the first is a mixed gas of hydrogen and nitrogen, the second is a single helium, and the third is a mixed gas of hydrogen, nitrogen and helium. The three tracer gas compositions can be designed to be redundant with each other, that is, when one of the methods is difficult to implement, the valve internal leakage verification can be maintained by the other two methods, which can improve the stability of the valve internal leakage verification and enable the valve internal leakage verification device to adapt to more complex working environments.

[0044] Specifically, taking the third method as an example, when detecting internal leakage of a valve, the valve to be tested 110 is first closed, and tracer gas is injected into the main pipeline 100 through the air inlet pipeline. The hydrogen detection sensor and the helium detection sensor are used to detect whether tracer gas passes through the sealing surface of the valve to be tested 110 and enters the downstream pipeline. When the concentration of hydrogen and helium is not 0, it indicates that the valve to be tested 110 has internal leakage.

[0045] In addition, in the case of the third method, compared with traditional valve internal leakage detection methods, such as differential pressure method, sonic wave method and other technologies, because nitrogen, hydrogen and helium are used to form a tracer gas, the anti-interference ability is strong, which can greatly improve the detection precision and accuracy, and can effectively reduce the common misjudgment problems in valve internal leakage detection. In addition, the device and detection method have a wide range of uses and can be used in the fields of tap water, heating, gas, etc.

[0046] Continue reading Figure 1 In an optional embodiment of the utility model, the nitrogen release component 211 includes a nitrogen bottle 2111, a nitrogen ball valve, a nitrogen pressure reducing valve and a nitrogen flow regulating valve 2112. The nitrogen bottle 2111 is arranged at the inlet of the air intake branch 200, the nitrogen flow regulating valve 2112 is arranged between the nitrogen bottle 2111 and the inlet of the air intake branch 200, the nitrogen pressure reducing valve is arranged between the nitrogen flow regulating valve 2112 and the nitrogen bottle 2111, and the nitrogen ball valve is arranged between the nitrogen bottle 2111 and the nitrogen pressure reducing valve. The nitrogen pressure reducing valve is used to protect the safety of the nitrogen bottle 2111 to avoid excessive gas pressure in the nitrogen bottle 2111, and the nitrogen ball valve is used to control the flow of nitrogen. Specifically, it can be adaptively set according to actual conditions.

[0047] Continue reading Figure 1In an optional embodiment of the utility model, the hydrogen release component 212 includes a hydrogen bottle 2121, a hydrogen ball valve, a hydrogen pressure reducing valve and a hydrogen flow regulating valve 2121. The hydrogen bottle 2121 is arranged at the inlet of the intake branch 200. The hydrogen flow regulating valve 2121 is arranged between the hydrogen bottle 2121 and the inlet of the intake branch 200. The hydrogen pressure reducing valve is arranged between the hydrogen flow regulating valve 2121 and the hydrogen bottle 2121. The hydrogen ball valve is arranged between the hydrogen bottle 2121 and the hydrogen pressure reducing valve. The hydrogen pressure reducing valve is used to protect the safety of the hydrogen bottle 2121 to avoid excessive gas pressure in the hydrogen bottle 2121. The hydrogen ball valve is used to control the flow of hydrogen. Specifically, it can be adaptively set according to actual conditions.

[0048] Continue reading Figure 1 In an optional embodiment of the utility model, the helium release component 213 includes a helium cylinder 2131, a helium ball valve, a helium pressure reducing valve and a helium flow regulating valve 2132. The helium cylinder 2131 is arranged at the inlet of the air intake branch 200. The helium flow regulating valve 2132 is arranged between the helium cylinder 2131 and the inlet of the air intake branch 200. The helium pressure reducing valve is arranged between the helium flow regulating valve 2132 and the helium cylinder 2131. The helium ball valve is arranged between the helium cylinder 2131 and the helium pressure reducing valve. The helium pressure reducing valve is used to protect the safety of the helium cylinder 2131 to avoid excessive gas pressure in the helium cylinder 2131. The helium ball valve is used to control the flow of helium. Specifically, it can be adaptively set according to actual conditions.

[0049] Continue reading Figure 1 In an optional embodiment of the utility model, the air intake branch 200 is provided with a flow regulating valve 220, and the flow regulating valve 220 is located between the gas release component 210 and the inlet of the air intake branch 200. The flow regulating valve 220 is used to control the flow of the tracer gas in the air intake branch 200, and then to control the total pressure of the mixed fluid in the main pipeline 100. It can be understood that by gradually increasing the flow of the tracer gas through the flow regulating valve 220, the total fluid pressure in the main pipeline 100 can be gradually increased. In this way, damage to the gas detection component 120 and the valve to be tested 110 due to a sudden increase in pressure in the pipeline can be avoided. In addition, the flow regulating valve 220 can also be used as a main valve of the air intake branch 200 to control the connection or blockage between the air intake branch 200 and the main pipeline 100, which can make the inspection of the valve to be tested 110 more convenient and easy to operate.

[0050] Continue reading Figure 1In an optional embodiment of the utility model, the air intake branch 200 is further provided with a check valve 230, and the check valve 230 is located between the flow regulating valve 220 and the outlet of the air intake branch 200. The check valve 230 is used to limit the fluid in the main pipeline 100 from entering the air intake branch 200. It can be understood that by setting the check valve 230, on the one hand, it can prevent the tracer gas or process medium from damaging the various components in the air intake branch 200 due to backflow. On the other hand, it can also prevent the gas leakage in the pipeline caused by the low pressure of the tracer gas or the accidental detachment of the air intake branch 200. In this way, the safety of the internal leakage verification device of the valve 110 to be tested can be greatly improved.

[0051] Continue reading Figure 1 In an optional embodiment of the utility model, the main line 100 also includes a main pressure detection component 130, which is arranged between the inlet of the main line 100 and the valve 110 to be tested. The main pressure detection component 130 is electrically connected to the verification host. The verification host can detect the pressure of the fluid in the main line 100 through the main pressure detection component 130. In this way, the fluid pressure in the main line 100 can be obtained in real time, avoiding excessive fluid pressure in the main line 100 and causing damage to various components in the main line 100 and various components in the intake branch 200, which can greatly improve the safety of the valve internal leakage verification device.

[0052] Continue reading Figure 1 In an optional embodiment of the utility model, the air intake branch 200 is further provided with an auxiliary pressure detection component 240, which is located between the flow control valve 220 and the outlet of the air intake branch 200. The auxiliary pressure detection component 240 is used to detect the pressure of the tracer gas entering the main line 100 from the air intake branch 200. It should be noted that during the detection process, the gas pressure detected by the auxiliary pressure detection component 240 needs to be greater than the fluid pressure detected by the main pressure detection component 130, that is, the pressure of the tracer gas needs to be greater than the pressure of the mixed fluid in the main line 100, so as to ensure that the tracer gas smoothly enters the main line 100, rather than the process medium in the main line 100 flowing into the air intake branch 200. It can be understood that by providing the auxiliary pressure detection component 240, a reference can be given during the adjustment process of the flow control valve 220, which can make the flow adjustment of the tracer gas more accurate and efficient, and can reduce the difficulty of using the valve internal leakage verification device.

[0053] Continue reading Figure 1In an optional embodiment of the utility model, the main line 100 also includes a temperature detection component, which is arranged between the main pressure detection component 130 and the valve to be tested 110. The temperature detection component is electrically connected to the calibration host. The temperature detection component is used to detect the temperature of the fluid in the main line 100. Since the temperature is directly related to the pressure of the fluid, the temperature of the fluid in the main line 100 is obtained by the temperature detection component, and the fluid pressure in the main line 100 can be corrected by a formula or algorithm to improve the accuracy of the calibration.

[0054] In an optional embodiment of the utility model, the verification host includes a control module and a data recording module, and the data recording module is electrically connected to the control module, wherein the control module includes a main pressure detection unit, a gas detection unit, a gas release unit, a flow regulation unit, an auxiliary pressure detection unit, a temperature detection unit and a verification calculation unit, etc. The main pressure detection unit is electrically connected to the main pressure detection component 130, and the main pressure detection unit is used to control the main pressure detection component 130 to perform pressure detection on the main line 100, and can feed back the detected pressure information to the verification calculation unit and the data recording module.

[0055] The gas concentration detection unit is electrically connected to the gas detection component 120, and the gas concentration detection unit is used to control the gas detection component 120 to detect the concentration of the tracer gas in the main pipeline 100, and can feed back the acquired gas concentration information to the verification calculation unit and the data recording module; the gas release unit is electrically connected to the gas release component, and the gas release unit is used to control the opening of each ball valve and pressure relief valve in the gas release component, that is, to control the opening or closing of the gas release component, and, in the aforementioned first and third tracer gas schemes, the gas release unit can also be used to control the proportion of each gas in the mixed gas; the flow regulating unit is electrically connected to the flow regulating valve 220, and the flow regulating unit is used to control the opening of the flow regulating valve 220, and the flow regulating unit can be regulated according to a preset command, and can also be controlled by an inspector.

[0056] The auxiliary pressure detection unit is electrically connected to the auxiliary pressure detection component 240. The auxiliary pressure detection unit is used to control the auxiliary pressure detection component 240 to perform pressure detection on the intake branch 200, and can feed back the detected pressure information to the verification calculation unit and the data recording module; the temperature detection unit is electrically connected to the temperature detection component. The temperature detection unit is used to control the temperature detection component to obtain the temperature of the fluid in the main circuit 100, and can feed back the detected information to the verification calculation unit and the data recording module.

[0057] The verification calculation unit can identify and determine whether the valve 110 to be tested has internal leakage based on the acquired pressure information, gas concentration information, temperature information, etc. Specifically, the corresponding module can be integrated on the PCB board, and the corresponding program data can be input into it. For more detailed and specific settings, please refer to the existing technology for adaptive design, which will not be repeated in this article.

[0058] The data recording module is used to record the fluid pressure, gas concentration information and fluid temperature in the main line 100. It can be understood that such a setting can facilitate subsequent manual judgment or correction, and can improve the functionality and humanization of the valve internal leakage detection device.

[0059] Figure 2 It is a schematic diagram of a remote control terminal provided by an embodiment of the utility model.

[0060] See also Figure 1 and Figure 2 In an optional embodiment of the utility model, the verification host further includes a wireless module, the wireless module is electrically connected to the control module and the data recording module respectively, the wireless module is used to wirelessly connect to a remote control terminal, and the remote wireless terminal can be a mobile device such as a computer, a tablet or a mobile phone. Figure 2 The remote controller shown in is illustrated and described as an example.

[0061] The remote control terminal can remotely control the verification host through wireless communication, and then control the valve internal leakage verification device; in an optional embodiment of the utility model, the remote control terminal can also execute the functions that can be achieved by the verification host in the aforementioned embodiment through wireless communication, that is, directly control other controllable components in the valve internal leakage verification device except the verification host. In this case, it is necessary to set the main pressure detection component 130, gas detection component 120, gas release component 210, flow control valve 220, auxiliary pressure detection component 240 and temperature detection component to components with remote transmission function, such as remote adjustable valves, pressure sensors and temperature sensors with remote data real-time transmission function, gas detection sensors with remote data real-time transmission function, etc.

[0062] Correspondingly, the remote control terminal needs to integrate a remote verification calculation unit, a wireless module, a remote flow regulation system, a remote pressure monitoring system, a remote temperature monitoring system, a remote gas detection system, a remote data recording module, a digital display screen, etc.

[0063] Among them, the remote flow regulation system can synchronously control the opening of the flow control valve 220 by wireless means, and then control the pressure of the tracer gas entering the main pipeline 100; the pressure sensor and temperature sensor with the function of remote data real-time transmission can monitor the pressure and temperature in front of the valve 110 to be tested by wireless means in real time; the remote gas detection system can control the gas detection component 120 by wireless means to detect the concentration of the tracer gas in the main pipeline 100 in real time. If the concentration of the tracer gas is not 0, the remote data recording module can record the fluid pressure, fluid temperature and tracer gas concentration at this moment for subsequent tracing and manual judgment.

[0064] The digital display screen is used to display the pressure, temperature and gas concentration in real time. When the valve 110 to be tested is found to have internal leakage, it can stop and flash to display the gas concentration, fluid pressure and fluid temperature at that moment.

[0065] On the basis of the aforementioned embodiment, the remote control terminal can also be switched to a fully automatic mode. Specifically, the remote control terminal will automatically adjust the pressure regulating button according to the preset command, thereby remotely driving the flow regulating valve 220 to complete the corresponding operation to realize the automatic pressure increase function. In addition, the remote control terminal can also remotely and synchronously control the flow of nitrogen, hydrogen, and helium released, and automatically match the proportion of hydrogen and helium according to the accuracy of the valve internal leakage detection. When the valve opening reaches the preset opening, the current valve opening is kept unchanged, and the fluid pressure, fluid temperature and gas concentration information are automatically recorded. Then, the pressure regulating button automatically returns to its position at the same time, and the flow regulating valve 220 is closed. The number of repeated verifications can be set according to actual conditions to achieve the accuracy of the verification.

[0066] It is understandable that the setting location of the valve 110 to be tested is mostly a harsh environment such as high temperature and high pressure. The valve internal leakage verification device provided by the embodiment of the utility model can be used to verify whether the valve 110 to be tested connected to the pipeline has an internal leakage problem by setting a wireless communication module and a remote control terminal; by remotely and synchronously controlling the opening of the flow control valve 220, the pressure of the mixed fluid after the tracer gas enters the main pipeline 100 can be adjusted; then, the pressure, temperature and gas concentration are obtained by wireless collection and transmission, and the remote verification calculation unit is used to automatically determine whether the valve 110 to be tested has an internal leakage problem. In this way, the inspector can remotely verify the valve 110 to be tested, which can maximize the safety of the inspector.

[0067] It should be noted that when the main pressure detection component 130 detects abnormal pressure or the fluid pressure of the main pipeline is greater than or equal to the injection pressure of the tracer gas (nitrogen, hydrogen, helium), the flow control valve 220 should automatically adjust the flow to 0, and the tracer gas will no longer be output to ensure the safety protection of the detection process. It should also be noted that the flow control program needs to be set to always keep the total proportion of hydrogen above 5% during the gas injection process, and automatically close the main injection valve when the hydrogen flow is abnormal.

[0068] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A valve internal leakage test device, characterized in that: include: A main pipeline (100) comprises a valve to be tested (110) and a gas detection component (120), wherein the gas detection component (120) is arranged between the valve to be tested (110) and an outlet of the main pipeline (100); An air intake branch (200), wherein a gas release component (210) is provided at the inlet of the air intake branch (200), and an outlet of the air intake branch (200) is provided between the inlet of the main pipeline (100) and the valve to be tested (110), and the gas release component (210) is used to provide a tracer gas for the air intake branch (200), and the tracer gas corresponds to the gas detection component (120); A verification host is electrically connected to the gas detection component (120), and the verification host is used to identify the tracer gas through the gas detection component (120).

2. The valve internal leakage test device according to claim 1, characterized in that: The gas release component (210) comprises a nitrogen release component (211) and a hydrogen release component (212), wherein the nitrogen release component (211) and the hydrogen release component (212) are arranged in parallel at the inlet of the intake branch (200); the nitrogen release component (211) is used to provide nitrogen to the intake branch (200), and the hydrogen release component (212) is used to provide hydrogen to the intake branch (200), and the tracer gas is a mixed gas of nitrogen and hydrogen.

3. The valve internal leakage test device according to claim 2, characterized in that: The gas release component (210) further comprises a helium release component (213); the helium release component (213), the nitrogen release component (211) and the hydrogen release component (212) are arranged in parallel at the inlet of the intake branch (200); the nitrogen release component (211) is used to provide nitrogen to the intake branch (200); the tracer gas is a mixed gas of nitrogen, hydrogen and helium, or the tracer gas is nitrogen.

4. The valve internal leakage test device according to claim 3, characterized in that: The nitrogen release component (211) comprises a nitrogen bottle (2111) and a nitrogen flow regulating component (2112); the nitrogen bottle (2111) is arranged at the inlet of the air intake branch (200); and the nitrogen flow regulating component (2112) is arranged between the nitrogen bottle (2111) and the inlet of the air intake branch (200); The hydrogen release component (212) comprises a hydrogen bottle (2121) and a hydrogen flow regulating component (2122), wherein the hydrogen bottle (2121) is arranged at the inlet of the air intake branch (200), and the hydrogen flow regulating component (2122) is arranged between the hydrogen bottle (2121) and the inlet of the air intake branch (200); The helium release component (213) comprises a helium bottle (2131) and a helium flow regulating component (2132); the helium bottle (2131) is arranged at the inlet of the air intake branch (200); and the helium flow regulating component (2132) is arranged between the helium bottle (2131) and the inlet of the air intake branch (200).

5. The valve internal leakage test device according to claim 1, characterized in that: The air intake branch (200) is provided with a flow regulating valve (220), and the flow regulating valve (220) is located between the gas release component (210) and the outlet of the air intake branch (200), and the flow regulating valve (220) is used to control the flow of the tracer gas.

6. The valve internal leakage test device according to claim 5, characterized in that: The air intake branch (200) is further provided with a check valve (230), wherein the check valve (230) is located between the flow regulating valve (220) and the outlet of the air intake branch (200), and the check valve (230) is used to limit the fluid in the main pipeline (100) from entering the air intake branch (200).

7. The valve internal leakage test device according to claim 5, characterized in that: The main pipe (100) further comprises a main pressure detection component (130), wherein the main pressure detection component (130) is arranged between the inlet of the main pipe (100) and the valve to be tested (110), and the main pressure detection component (130) is used to detect the fluid pressure in the main pipe (100).

8. The valve internal leakage test device according to claim 7, characterized in that: The air intake branch (200) is further provided with an auxiliary pressure detection component (240), the auxiliary pressure detection component (240) being located between the flow regulating valve (220) and the outlet of the air intake branch (200), and the auxiliary pressure detection component (240) being used to detect the pressure of the tracer gas in the air intake branch (200).

9. The valve internal leakage test device according to claim 8, characterized in that: The verification host comprises: a control module, electrically connected to the main pressure detection component (130), the gas detection component (120), the gas release component (210), the flow control valve (220) and the auxiliary pressure detection component (240), respectively, and used to control the main pressure detection component (130), the gas detection component (120), the gas release component (210), the flow control valve (220) and the auxiliary pressure detection component (240) to respectively perform corresponding operations; A data recording module is electrically connected to the control module, and is used to record the fluid pressure in the main pipeline (100), the gas concentration information of the tracer gas, and the fluid temperature in the main pipeline (100).

10. The valve internal leakage test device according to claim 9, characterized in that: The verification host also includes a wireless module, which is electrically connected to the control module and the data recording module respectively, and is used to wirelessly connect to a remote control terminal.

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