Testing device for valve positioner

Abstract

The utility model discloses a testing device for a valve positioner, which comprises an air source pipeline, a signal generator and an air cylinder, the signal generator is directly connected to the valve positioner and sends a preset electric signal to the valve positioner, the requirement of a control system on the opening degree of a valve is simulated, and the air cylinder is positioned below the valve positioner. The air cylinder is used for receiving air flowing out of the valve positioner and generating corresponding physical actions according to the air cylinder, a feedback device is arranged at the output end of the air cylinder and can convert the actions of the air cylinder into quantifiable feedback signals, and therefore an operator can judge the working state and accuracy of the valve positioner by analyzing the feedback signals. According to the method, comprehensive performance evaluation is carried out on the valve positioner, a technician can directly verify the functional integrity of the valve positioner in an off-line state, the technician does not need to depend on a complex upper computer instruction or worry about the limitation of an encryption control program on a production line, and the problem is greatly solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve detection, in particular to a testing device for valve positioner. BACKGROUND

[0002] In steel enterprises, air compressor stations and seawater desalination production lines are key links. These production lines usually need to adjust valves to accurately control the flow, pressure and other parameters of input and output medium to ensure that the entire process is in a balanced state. The stability and accuracy of the operation of the regulating valve, as an important device to achieve this goal, are crucial. However, in actual use, the regulating valve may have problems such as fluctuation and jamming, which not only affects the normal progress of the production process, but also may cause production efficiency to decline or even safety accidents.

[0003] When the regulating valve has a problem, maintenance personnel can usually only give an opening degree instruction through the host computer, and then observe the actual action of the field valve to judge the working state of the positioner. This method cannot independently test the valve positioner offline, nor can it effectively detect whether the positioner can normally receive the current signal and respond correctly. In addition, the control program of some regulating valves is encrypted for protection, which further limits the ability of maintenance personnel to monitor and debug them, posing a challenge to quickly restore the device to normal operating state. CONTENT OF THE UTILITY MODEL

[0004] In view of the defects in the prior art, the present application provides a testing device for valve positioner to solve the problem that the reliability of the valve positioner cannot be detected offline in the prior art.

[0005] The above-mentioned purpose of the present application is mainly realized by the following technical solutions:

[0006] A testing device for valve positioner, the testing device comprises:

[0007] A gas source pipeline, one end of which is used to connect and introduce a gas source, and the other end is used to connect the air inlet end of the valve positioner to be tested;

[0008] A signal generator connected to the valve positioner, the signal generator is used to output a given signal to the valve positioner to control the opening degree of the valve positioner;

[0009] A gas cylinder supported under the valve positioner, a communication pipe is connected between the air inlet end of the gas cylinder and the air outlet end of the valve positioner, and the output end of the gas cylinder is connected with a feedback device that can output a feedback signal.

[0010] In an optional embodiment, a first control valve is arranged on the gas source pipeline.

[0011] In an optional embodiment, a detachable communication joint is arranged between the gas source pipeline and the valve positioner.

[0012] In an optional embodiment, a detachable communication joint is arranged between the communication pipeline and the gas cylinder.

[0013] In an optional embodiment, the connecting joint is a quick joint.

[0014] In an optional embodiment, a bracket is fixedly arranged on the gas cylinder, and a connecting piece for fixing the valve positioner is arranged on the bracket.

[0015] In an optional embodiment, the bracket is in a U shape, and the connecting piece is in a bolt structure.

[0016] In an optional embodiment, the signal generator and the valve positioner are connected through two signal lines.

[0017] In an optional embodiment, the signal lines are fully-enclosed crocodile clip lines for connecting the signal generator and the signal terminal on the valve positioner.

[0018] In an optional embodiment, the signal generator provides a 4-20 mA current signal to the valve positioner.

[0019] Compared with the prior art, the application has the following advantages:

[0020] The test device for the valve positioner in the application comprises a gas source pipeline, a signal generator and a gas cylinder. One end of the gas source pipeline is used for connecting and inputting a gas source, and the other end is used for connecting an air inlet end of a valve positioner to be tested. The signal generator is connected to the valve positioner, and is used for outputting a given signal to the valve positioner to control the opening degree of the valve positioner. The gas cylinder is supported under the valve positioner. A communication pipeline is connected between an air inlet end of the gas cylinder and an air outlet end of the valve positioner. An output end of the gas cylinder is connected to a feedback device which can output a feedback signal.

[0021] The one end of the air source pipeline is connected with an external air source, and the other end is connected with the air inlet of the valve positioner to be tested, so as to provide the air required by the valve positioner, and simulate the normal operation environment of the valve positioner. The signal generator is directly connected to the valve positioner and sends a preset electrical signal to the valve positioner to simulate the requirement of the control system on the valve opening degree, so as to test whether the valve positioner can accurately adjust the position of the valve according to the input signal. The air cylinder is located below the valve positioner, receives the air flowing out of the valve positioner, and generates a corresponding physical action accordingly. The output end of the air cylinder is provided with a feedback device, which can convert the action of the air cylinder into a quantifiable feedback signal, so that the operator can judge the working state and accuracy of the valve positioner by analyzing the feedback signal. Without interfering with the actual production process, a closed-loop system including air source supply, signal input and feedback measurement is constructed, so as to comprehensively evaluate the performance of the valve positioner. The technical personnel can directly verify the functional integrity of the valve positioner in the offline state without relying on complex host computer instructions or worrying about the limitation of the encryption control program on the production line, which greatly speeds up the problem positioning speed. Not only solves the limitations in the traditional method, but also improves the efficiency and accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0023] Figure 1 The connection schematic diagram of the test device provided by the embodiments of the present application is shown in the figure.

[0024] In the figure: 100, air source pipeline; 200, signal generator; 300, air cylinder; 4, valve positioner; 501, communication pipe; 502, first control valve; 503, communication joint; 504, support; 505, connecting piece; 506, signal line. DETAILED DESCRIPTION

[0025] The present application will be further described below in combination with the drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. The specific structure and functional details disclosed in this paper are only used to describe the example embodiments of the present application. However, the present application can be embodied in many alternative forms, and should not be understood as being limited in the embodiments described herein.

[0026] As Figure 1 shown, Figure 1The connection diagram of the test device provided by the embodiment of the present application is a test device of a valve positioner 4. The test device provides a comprehensive and reliable solution, enabling maintenance personnel to accurately assess and verify the functional status of the valve positioner 4 without affecting the production process. The test device comprises an air supply pipeline 100, a signal generator 200, and an air cylinder 300, wherein:

[0027] One end of the air supply pipeline 100 is connected to and connected to an air source, and the other end is connected to the air inlet end of the valve positioner 4 to be tested. One end of the air supply pipeline 100 is connected to an external air supply device, such as a compressed air tank or a compressed air network in the factory, to ensure that stable working gas can be provided for the valve positioner 4. The other end is directly connected to the air inlet end of the valve positioner 4 to be tested, simulating the operating conditions in the actual working environment. In this way, the valve positioner 4 can be tested under the required air pressure conditions for its normal operation, thereby more truly reflecting its performance.

[0028] The signal generator 200 is connected to the valve positioner 4, and the signal generator 200 is used to output a given signal to the valve positioner 4 to control the opening degree of the valve positioner 4. The signal generator 200 is responsible for sending accurate control signals to the valve positioner 4. These signals are usually standard electrical signals, such as 4-20mA current signals, which simulate actual instructions from a process control system (such as DCS or PLC). The signal generator 200 functions to issue different opening degree instructions to the valve positioner 4 according to preset parameters, so as to verify whether the valve positioner 4 can accurately respond and adjust the valve position.

[0029] The air cylinder 300 is supported below the valve positioner 4, and a communication pipe 501 is connected between the air inlet end of the air cylinder 300 and the air outlet end of the valve positioner 4. The output end of the air cylinder 300 is connected to a feedback device that can output feedback signals.

[0030] The air cylinder 300 is located below the valve positioner 4 and is used to receive the control gas output from the valve positioner 4 and convert it into mechanical action. The air inlet end of the air cylinder 300 is connected to the air outlet end of the valve positioner 4 through the communication pipe 501, ensuring smooth and unobstructed gas flow. In addition, the output end of the air cylinder 300 is connected to a feedback device, which can convert the action of the air cylinder 300 into quantifiable electrical signals or other forms of feedback information. These feedback information can help technicians analyze the actual operation of the valve positioner 4, including its response speed, accuracy, and stability, and other key indicators. Through the analysis of these data, technicians can quickly diagnose any potential problems and take appropriate measures to repair.

[0031] Not only solves the problem of difficult to detect the reliability of the valve positioner 4 offline in the traditional method, but also improves the efficiency and accuracy of troubleshooting. Provides an effective tool for the industrial field, so that even in the complex and changeable production environment, the best working state of the valve positioner 4 can be guaranteed, and the continuity and stability of the whole process are ensured.

[0032] The test device of the valve positioner 4 in the application includes a gas source pipeline 100, a signal generator 200 and a gas cylinder 300. One end of the gas source pipeline 100 is used to connect and input the gas source, and the other end is used to connect the air inlet end of the valve positioner 4 to be tested. The signal generator 200 is connected to the valve positioner 4, and the signal generator 200 is used to output a given signal to the valve positioner 4 to control the opening of the valve positioner 4. The gas cylinder 300 is supported under the valve positioner 4, and a communication pipe 501 is connected between the air inlet end of the gas cylinder 300 and the air outlet end of the valve positioner 4. The output end of the gas cylinder 300 is connected with a feedback device which can output a feedback signal.

[0033] One end of the gas source pipeline 100 is connected to an external gas source, and the other end is connected to the air inlet end of the valve positioner 4 to be tested, which provides the valve positioner 4 with the gas required for work and simulates its normal operating environment. The signal generator 200 is directly connected to the valve positioner 4 and sends a preset electrical signal to it, simulating the requirements of the control system for the valve opening, so as to verify whether the valve positioner 4 can accurately adjust the position of the valve according to the input signal. The gas cylinder 300 is located below the valve positioner 4, receives the gas flowing out from the valve positioner 4, and generates a corresponding physical action accordingly. The output end of the gas cylinder 300 is equipped with a feedback device, which can convert the action of the gas cylinder 300 into a quantifiable feedback signal, so that the operator can analyze these feedback signals to judge the working state and accuracy of the valve positioner 4. Without interfering with the actual production process, a closed-loop system including gas supply, signal input and feedback measurement is constructed, so as to comprehensively evaluate the performance of the valve positioner 4. The technical personnel can directly verify the functional integrity of the valve positioner 4 in the offline state, without relying on complex host computer instructions or worrying about the limitation of the encryption control program on the production line, greatly speeding up the problem positioning. Not only solves the limitations in the traditional method, but also improves the efficiency and accuracy, which has important significance for ensuring the stability and safety of the industrial production process.

[0034] In the optional embodiment, a first control valve 502 is arranged on the gas source pipeline 100. The operator can accurately control the gas flow and pressure entering the valve positioner 4 according to the test requirements, ensuring the consistency and accuracy of the test conditions. By adjusting the first control valve 502, different working scenarios such as valve response under high or low pressure conditions can be simulated.

[0035] In an optional embodiment, a detachable communication joint 503 is provided between the gas source pipeline 100 and the valve positioner 4. This greatly facilitates the connection and replacement of valve positioners 4 of different models and specifications, improving the versatility and flexibility of the test device. The use of detachable joints not only simplifies the installation process, but also makes maintenance more convenient, reducing downtime.

[0036] In an optional embodiment, a detachable communication joint 503 is provided between the communication pipe 501 and the gas cylinder 300. This provides convenience for the modularization of the test system, allowing quick adjustment or replacement of components as needed, while also facilitating transportation and storage. In particular, for on-site maintenance and technical support, this quick disassembly design significantly improves work efficiency.

[0037] In an optional embodiment, the connection joint is a quick joint. The use of quick joints greatly shortens the time for system assembly and disassembly, while ensuring the sealing and safety of the connection. Quick joints usually have a self-locking function, allowing installation and removal without the use of tools, making them particularly suitable for situations where components are frequently replaced.

[0038] In an optional embodiment, a bracket 504 is fixedly provided on the gas cylinder 300, and a connecting piece 505 for fixing the valve positioner 4 is provided on the bracket 504. The bracket 504 provides a stable platform, ensuring that the positions of the components remain fixed during testing, thereby avoiding measurement errors caused by vibration or other external factors.

[0039] In an optional embodiment, the bracket 504 is U-shaped, and the connecting piece 505 is a bolt structure. The U-shaped bracket 504 not only can stably support the valve positioner 4, but also can adapt to devices of different sizes, while providing the space required for operating the bolt structure, improving the convenience of operation. The use of a bolt structure as the connecting piece 505 further enhances stability and ease of disassembly, while facilitating fine-tuning to achieve optimal installation results.

[0040] In an optional embodiment, the signal generator 200 and the valve positioner 4 are connected through two signal lines 506. The two signal lines 506 are responsible for transmitting control signals from the signal generator 200 to the valve positioner 4, as well as any feedback signals that may exist. In this way, precise control of the opening of the valve positioner 4 can be achieved, and its response state can be monitored in real time.

[0041] In an optional embodiment, the signal line 506 adopts a fully-enclosed crocodile clip wire for connecting the signal generator 200 and the signal terminal on the valve positioner 4. The fully-enclosed crocodile clip wire has good electrical performance and mechanical strength, can effectively prevent external interference, and ensure the accuracy and stability of signal transmission. In addition, the fully-enclosed crocodile clip wire is easy to plug and unplug, and is convenient for on-site debugging and troubleshooting.

[0042] In an optional embodiment, the signal generator 200 provides a 4-20mA current signal to the valve positioner 4. By sending a 4-20mA current signal, the signal generator 200 can effectively instruct the valve positioner 4 to execute the corresponding opening degree instruction, which can provide sufficient resolution to achieve accurate control and maintain signal integrity during long-distance transmission. In turn, the response speed and accuracy are verified.

[0043] It should be understood that the terms first, second, etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Although the terms first, second, etc. can be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit can be referred to as the second unit, and similarly the second unit can be referred to as the first unit, without departing from the scope of the example embodiments of the present application.

[0044] It should be understood that the term "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, B alone, and A and B together. The term "and" herein describes another association relationship of the associated objects, which means that there can be two relationships, for example, A and B, which means that there are two cases of A alone and A and B together. In addition, the character " / " herein generally indicates that the associated objects before and after are an "or" relationship.

[0045] It should be understood that in the description of the present application, the terms "upper", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship of the disclosed product when it is usually placed, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term "arrange", "install", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be direct connection, also can indirectly connect through intermediate medium, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including" when used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0048] In the following description, specific details are set forth to provide a thorough understanding of example embodiments. However, persons having ordinary skill in the art will appreciate that example embodiments can be practiced without some or all of the specific details. In other instances, well known process steps have been described in brief, or not described in detail, in order to avoid obscuring example embodiments.

[0049] The particular embodiments described above are shown by way of example, and could be practiced not only as described, but could also be practiced with proper modification within the scope of the present application. These embodiments meet and exceed the minimum standards for patentability. Nothing has been set forth herein to imply that the present application will not also cover autmatically those prior art modifications currently known to be made to the application and those future modifications in light of new technologies.

[0050] It should be noted that information disclosed in the background section is only for strengthening the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art.

Claims

1. A testing device for a valve positioner, characterized in that, The testing apparatus includes: The air supply pipeline has one end for connecting to and supplying air to the air source, and the other end for connecting to the air inlet of the valve positioner to be tested. A signal generator is connected to the valve positioner. The signal generator is used to output a given signal to the valve positioner and control the opening degree of the valve positioner. A cylinder is supported under the valve positioner. A connecting pipe is connected between the air inlet of the cylinder and the air outlet of the valve positioner. The output end of the cylinder is connected to a feedback device that outputs feedback signals.

2. The testing device for the valve positioner as described in claim 1, characterized in that: The gas source pipeline is equipped with a first control valve.

3. The testing device for the valve positioner as described in claim 1, characterized in that: A detachable connecting joint is provided between the gas source pipeline and the valve positioner.

4. The testing device for the valve positioner as described in claim 1, characterized in that: A detachable connecting joint is provided between the connecting pipe and the cylinder.

5. The testing device for the valve positioner as described in claim 3 or 4, characterized in that: The connecting connector is a quick connector.

6. The testing device for the valve positioner as described in claim 1, characterized in that: A bracket is fixedly mounted on the cylinder, and a connector for fixing the valve positioner is mounted on the bracket.

7. The testing device for the valve positioner as described in claim 6, characterized in that: The bracket is U-shaped, and the connector is a bolt structure.

8. The testing device for the valve positioner as described in claim 1, characterized in that: The signal generator and the valve positioner are connected by two signal lines.

9. The testing device for the valve positioner as described in claim 8, characterized in that: The signal line is a fully enclosed alligator clip cable used to connect the signal generator to the signal terminal on the valve positioner.

10. The testing device for the valve positioner as described in claim 1, characterized in that: The signal generator provides a 4-20mA current signal to the valve positioner.

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