Test box for testing low-temperature performance of valve positioner

Abstract

The utility model relates to the technical field of valve positioner test equipment, and discloses a valve positioner low-temperature performance test box which comprises a test box body, two positioner main bodies are arranged in the test box body, and a test assembly used for testing the low-temperature performance of the positioner main bodies is arranged in the test box body. The test assembly comprises a cooling system arranged on the rear side of the test box, a cold air opening of the cooling system is formed in the rear side in the test box, and an isolation frame is fixed to the middle position in the test box. The cooling system outputs cold air to simulate a low-temperature environment, at the moment, the computer system in the control box continuously detects the operation condition and the response speed of the positioner main body, and after the positioner main body operates at a certain low temperature, the lifting frame is driven to descend to the lower layer of the test box, so that the positioner main body quickly enters a normal-temperature environment; the performance of the positioner main body is not degraded after low-temperature circulation, and the test accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve positioner test equipment technical field especially relates to a valve positioner low temperature performance test test box. BACKGROUND

[0002] Valve positioner is the main accessory of regulating valve, usually is used with regulating valve, it receives the output signal of regulator, then with its output signal to control regulating valve, when regulating valve acts, the displacement of valve stem is fed back to valve positioner through mechanical device, and valve position is transmitted to the upper system through electric signal, and the valve positioner needs to be tested before leaving factory.

[0003] The existing valve positioner testing device (announcement number: CN207406903U) has at least the following disadvantages: the device cannot simulate low temperature environment when testing, so it is difficult to determine the influence speed and running condition of the valve positioner in the low temperature environment, and the existing technology usually uses a refrigeration box to simulate the low temperature environment to test the valve positioner, but it is difficult to realize the low temperature cycle test of the valve positioner, that is, the valve positioner is placed in normal temperature operation after running in the low temperature environment for a period of time, and it is difficult to ensure that the performance of the valve positioner does not deteriorate after experiencing low temperature cycle, so the utility model is proposed. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a valve positioner low temperature performance test test box.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A valve positioner low temperature performance test test box, comprising a test box, two positioner main bodies are arranged in the inside of the test box, a test assembly for testing the low temperature performance of the positioner main body is arranged in the inside of the test box, the test assembly comprises a cooling system arranged at the rear side of the test box, the cooling system is provided with a cooling air outlet in the rear side of the inside of the test box, an isolation frame is fixed at the middle position in the inside of the test box, the inside of the isolation frame is movably sleeved with a lifting frame, the two positioner main bodies are located in the inside of the lifting frame, the top surface and the bottom surface of the inside of the lifting frame can abut against the top surface and the bottom surface of the isolation frame respectively, and a plurality of ventilation holes are formed in the front side of the test box.

[0007] As a further scheme of the utility model, the inside bottom surface of the test box is rotatably connected with a hydraulic rod near the right side, one end of the hydraulic rod is rotatably connected with the bottom surface of the lifting frame near the left side, the left side of the test box is fixed with a control box, the inside of the control box is provided with a computer system, the front side of the control box is also embedded with an HMI control panel, the positioner main body, the cooling system, the hydraulic rod and the HMI control panel are connected with the computer system.

[0008] As a further scheme of the utility model, the inside of the test box is fixed with a limiting rod near the four corners, the lifting frame is slidably arranged on the outer wall of the limiting rod.

[0009] As a further scheme of the utility model, the front side of the test box is connected with a connecting door through a hinge, the side of the connecting door near the test box is fixed with a first sealing strip, the top surface and the bottom surface of the isolation frame are both fixed with a second sealing strip.

[0010] As a further scheme of the utility model, the inside top surface of the lifting frame is fixed with three fixing frames, the two ends of the three fixing frames close to each other are both provided with a flange plate, the two positioner main bodies are detachably installed with the flange plates of the three fixing frames through bolts.

[0011] As a further scheme of the utility model, the bottom surface of the lifting frame is fixed with a temperature sensor, the detection end of the temperature sensor extends to the inside of the lifting frame.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] By installing the positioner main body in the inside of the test box, then outputting cold air through the cooling system to simulate a low temperature environment, at this time, the computer system in the control box continuously detects the running condition and response speed of the positioner main body, after the positioner main body runs at a certain low temperature, the lifting frame is driven to descend to the lower layer of the test box, so that the positioner main body rapidly enters a normal temperature environment, ensuring that the performance of the positioner main body does not deteriorate after experiencing low temperature circulation, increasing the accuracy of the test, and when the lifting frame is lifted to the upper layer or the lower layer of the test box, the top or the bottom of the lifting frame abuts, thereby ensuring that the upper space of the test box is isolated from the outside, reducing the overflow of cold air and reducing the load of the cooling system. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A perspective structural schematic view of a valve positioner low temperature performance test test box is provided for the utility model;

[0015] Figure 2 A test box perspective sectional structure schematic view of a valve positioner low temperature performance test test box is provided for the utility model;

[0016] Figure 3 A kind of isolation frame place three-dimensional structure schematic diagram of the utility model is proposed for a valve positioner low temperature performance test test box.

[0017] Figure 4 A kind of lifting frame place three-dimensional structure schematic diagram of the utility model is proposed for a valve positioner low temperature performance test test box.

[0018] In the drawing: 1, test box;101, positioner main body;2, isolation frame;201, lifting frame;202, vent hole;203, hydraulic rod;204, control box;3, limit rod;4, connecting door;401, first sealing strip;402, second sealing strip;5, fixed frame;501, flange plate;6, temperature sensor. DETAILED DESCRIPTION

[0019] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0020] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like is the orientation or position relationship shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0021] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0022] For example, Figures 1-4As shown, a low-temperature performance testing chamber for valve positioners includes a test chamber 1. Inside the test chamber 1 are two positioner bodies 101. The test chamber 1 also contains a testing assembly for testing the low-temperature performance of the positioner bodies 101. The testing assembly includes a cooling system located at the rear of the test chamber 1, with cold air vents opening at the rear of the test chamber 1. An isolation frame 2 is fixed in the middle of the interior of the test chamber 1, dividing the interior of the test chamber 1 into an upper and lower layer. A lifting frame 201 is movably fitted inside the isolation frame 2. Both positioner bodies 101 are located inside the lifting frame 201. The top and bottom surfaces of the lifting frame 201 can respectively abut against the top and bottom surfaces of the isolation frame 2. Several ventilation holes 202 are provided on the front of the test chamber 1.

[0023] like Figures 2-4 As shown, in this embodiment, a hydraulic rod 203 is rotatably connected to the bottom surface of the test chamber 1 near the right side. One end of the telescopic rod of the hydraulic rod 203 is rotatably connected to the bottom surface of the lifting frame 201 near the left side. A control box 204 is fixed to the left side of the test chamber 1. A computer system is installed inside the control box 204. An HMI control panel is also embedded in the front of the control box 204. The positioner body 101, the cooling system, the hydraulic rod 203, and the HMI control panel are all connected to the computer system. By activating the cooling system, cold air is input to the upper part of the test chamber 1. During this process, the temperature sensor 6 monitors the internal temperature of the test chamber 1 in real time and controls it through the cooling system. Subsequently, the computer system begins to detect the positioner. Regarding the operation and response speed of the main body 101, after the main body 101 of the positioner has undergone a certain period of low-temperature operation, the hydraulic rod 203 is activated to drive the lifting frame 201 to descend to the lower layer of the test chamber 1. At this time, the lower layer of the test chamber 1 is at room temperature with ventilation holes 202 and external ventilation, which allows the main body 101 of the positioner to quickly enter the room temperature environment, ensuring that the performance of the main body 101 of the positioner has not deteriorated after experiencing low-temperature cycling, and increasing the accuracy of the test. When the lifting frame 201 is raised or lowered to the upper or lower layer of the test chamber 1, the top or bottom surface of the lifting frame 201 will be in contact with the outside, thereby ensuring that the upper space of the test chamber 1 is isolated from the outside, reducing the leakage of cold air and reducing the load on the cooling system.

[0024] like Figures 2-4 As shown in this embodiment, the test chamber 1 has four fixed limit rods 3 near the corners. The lifting frame 201 is slidably disposed on the outer wall of the limit rods 3. By setting the limit rods 3, the lifting frame 201 can be limited and supported in its lifting and lowering.

[0025] like Figures 2-4As shown in the embodiment, the front side of the test box 1 is connected with a connecting door 4 through a hinge, the first sealing strip 401 is fixed on the side close to the test box 1, and the second sealing strip 402 is fixed on the top surface and the bottom surface of the isolation frame 2, so that the cold air of the upper layer of the test box 1 can be prevented from overflowing, and the load of the cooling system can be reduced.

[0026] As shown in the embodiment, the inside top surface of the lifting frame 201 is fixed with three fixing frames 5, the two ends of the three fixing frames 5 close to each other are provided with flanges 501, and the two positioner bodies 101 are detachably installed with the flanges 501 of the three fixing frames 5 through bolts, so that the positioner body 101 can be stably installed on the lifting frame 201. Figures 2-4 As shown in the embodiment, the bottom surface of the lifting frame 201 is fixed with the temperature sensor 6, the detection end of the temperature sensor 6 extends to the inside of the lifting frame 201, and the inside temperature of the test box 1 can be monitored in real time through the temperature sensor 6, so that different low-temperature environments can be simulated more accurately.

[0027] Figures 2-4 As shown in the embodiment, the bottom surface of the lifting frame 201 is fixed with the temperature sensor 6, the detection end of the temperature sensor 6 extends to the inside of the lifting frame 201, and the inside temperature of the test box 1 can be monitored in real time through the temperature sensor 6, so that different low-temperature environments can be simulated more accurately.

[0028] As shown in the embodiment, the bottom surface of the lifting frame 201 is fixed with the temperature sensor 6, the detection end of the temperature sensor 6 extends to the inside of the lifting frame 201, and the inside temperature of the test box 1 can be monitored in real time through the temperature sensor 6, so that different low-temperature environments can be simulated more accurately.

[0029] ​The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A valve positioner low temperature performance test chamber comprising a test chamber (1), characterized in that, The inside of the test box (1) is provided with two locator bodies (101), and the inside of the test box (1) is provided with a test assembly for testing the low-temperature performance of the locator body (101). The test assembly includes a cooling system arranged at the rear side of the test box (1), and the cooling system has a cooling air outlet arranged at the rear side of the inside of the test box (1). An isolation frame (2) is fixed at the middle position of the inside of the test box (1), and the isolation frame (2) divides the inside of the test box (1) into an upper layer and a lower layer. A lifting frame (201) is movably sleeved in the inside of the isolation frame (2), and the two locator bodies (101) are located in the inside of the lifting frame (201). The top surface and the bottom surface of the lifting frame (201) can respectively abut against the top surface and the bottom surface of the isolation frame (2). A plurality of ventilation holes (202) are arranged at the front side of the test box (1).

2. The valve positioner low temperature performance test test chamber of claim 1, wherein, The inside bottom surface of the test box (1) is rotatably connected to a hydraulic rod (203) near the right side. One end of the telescopic rod of the hydraulic rod (203) is rotatably connected to the bottom surface of the lifting frame (201) near the left side. A control box (204) is fixed to the left side of the test box (1). A computer system is arranged in the inside of the control box (204). An HMI control panel is also embedded and installed at the front side of the control box (204). The locator body (101), the cooling system, the hydraulic rod (203) and the HMI control panel are all connected to the computer system.

3. The valve positioner low temperature performance test test chamber of claim 2, wherein, Limit rods (3) are fixed to the inside of the test box (1) near the four corners. The lifting frame (201) and the outer wall of the limit rod (3) are slidingly arranged.

4. The valve positioner low temperature performance test test chamber of claim 3, wherein, A connecting door (4) is hingedly connected to the front side of the test box (1). A first sealing strip (401) is fixed to the side of the connecting door (4) close to the test box (1). Second sealing strips (402) are fixed to the top surface and the bottom surface of the isolation frame (2).

5. The valve positioner low temperature performance test test chamber of claim 4, wherein, Three fixing frames (5) are fixed to the top surface of the lifting frame (201). Flanges (501) are arranged at the two ends of each of the three fixing frames (5) close to each other. The two locator bodies (101) are detachably installed on the flanges (501) of the three fixing frames (5) by bolts.

6. The valve positioner low temperature performance test test chamber of claim 5, wherein, A temperature sensor (6) is fixed to the bottom surface of the lifting frame (201), and the detection end of the temperature sensor (6) extends into the inside of the lifting frame (201).

Images