A valve sealing detection device for low-temperature environments

Abstract

This utility model discloses a valve sealing test device under low-temperature conditions. The left and right ends of the support assembly are fixedly equipped with sliders for sliding within a groove. The clamping and fixing device includes a movable component disposed within the support assembly for movement, and a clamping component for clamping and fixing the valve is provided on the movable component. Thus, the two movable plates are driven to move in opposite directions, and their bottom movable blocks move outward along the round rod and compress spring one. After the valve is placed in, the movable plates are released, and spring one resets, driving the clamping component to fix the valve. The top plate is pulled up and moves along the slide rod, stretching spring two. After release, spring two drives the top plate to clamp the valve vertically. The support plate is placed into the test chamber via the sliders along the groove, and the valve is connected to the connecting pipe and the sealing strip is tightened. Refrigerant is delivered to the chamber through the compressor via the water inlet pipe for cooling, while the vacuum chamber is kept warm. The valve's airtightness is determined by observing whether bubbles are generated at low temperatures through the observation window.

Description

Technical Field

[0001] This utility model relates to the technical field of valve testing equipment, and in particular to a valve sealing testing device under low temperature conditions. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the conveyed medium. To ensure that valves can be used normally in low-temperature environments, it is usually necessary to test the valve's sealing performance in a low-temperature environment after the valve is assembled.

[0003] Existing methods for testing valve sealing performance mostly involve using open testing chambers and testing the valve sealing performance at room temperature.

[0004] However, when using an open testing box to test the sealing performance of valves, cold air will escape during the testing process because the testing box is open; thus, it cannot reflect the sealing performance of valves under low-temperature conditions; at the same time, it lacks clamping devices for different types of valves, so it cannot be adapted to clamping and fixing different types of valves. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, this utility model proposes a valve sealing detection device under low-temperature conditions. Two moving plates are driven to move in opposite directions, with the bottom moving block moving outward along the round rod and compressing spring one. After the valve is placed in, the moving plates are released, and spring one resets, driving the clamping assembly to fix the valve. The top plate is pulled up and moves along the slide rod, stretching spring two. After release, spring two drives the top plate to clamp the valve vertically. The support plate is placed into the detection chamber via a slider along the slide groove. After the connecting pipe connects to the valve, the sealing strip is tightened. A compressor delivers refrigerant to the chamber through the water inlet pipe for cooling, while the vacuum chamber is kept warm. The device observes through the observation window whether bubbles are generated in the valve at low temperatures, thus determining its airtightness.

[0007] To achieve the above objectives, this utility model proposes a valve sealing testing device under low-temperature conditions, comprising a testing chamber, a support device for placing the valve inside the testing chamber, a clamping and fixing device for clamping and fixing the valve inside the support device, a vacuum chamber for heat insulation inside the testing chamber, and a sliding groove for restricting the support device inside the testing chamber. The support device includes a support component disposed inside the testing chamber for supporting the valve, and sliders for sliding within the sliding groove are fixedly installed at both ends of the support component. The clamping and fixing device includes a moving component disposed inside the support component for moving, and a clamping component for clamping and fixing the valve is disposed on the moving component.

[0008] In addition, the valve sealing detection device proposed above in this application may also have the following additional technical features:

[0009] Specifically, the top of the testing box is movably connected to a movable cover for sealing the testing box, and a sealing strip for sealing the testing box is fixedly installed on the top of the movable cover. The front of the testing box has an observation window for observing the inside of the testing box.

[0010] Specifically, the right end of the testing box is provided with a water inlet pipe for adding refrigerant into the testing box, and a connecting pipe for connecting the valve on the support device is provided below the water inlet pipe. The right end of the testing box is provided with a drain pipe for discharging the cooling water in the testing box.

[0011] Specifically, the support assembly includes a support plate disposed inside the detection box for placing the valve, and the support plate has two elongated slots.

[0012] Specifically, the moving component includes a round rod fixedly installed in a long slot, a moving block for moving is fitted on the rod body, a moving plate is fixedly installed on the top of the moving block, and a spring for driving the moving plate to move is fitted on the rod body.

[0013] Specifically, the clamping assembly includes a connecting plate fixedly installed on the end of the moving plate away from the spring, and a clamping plate for clamping and fixing the valve is fixedly installed on the end of the connecting plate away from the moving plate. Two limiting grooves are formed on the plate body of the clamping plate.

[0014] Specifically, a slide rod is fixedly installed in the limiting groove, and a sliding plate for moving up and down is fitted on the slide rod. A top plate for clamping and fixing the valve is fixedly installed at the end of the sliding plate away from the clamping plate. A spring 2 for cooperating with the sliding plate is fitted on the slide rod.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] By setting up a support device and a clamping and fixing device, when it is necessary to perform a low-temperature airtightness test on the valve, the two moving plates are driven to move in opposite directions, and the bottom moving block moves outward along the round rod and compresses the first spring; after the valve is placed in, the moving plates are released, and the first spring resets to drive the clamping assembly to fix the valve; the top plate is pulled up to move along the slide rod and stretch the second spring, and after it is released, the second spring drives the top plate to clamp the valve from top to bottom; the support plate is placed into the test chamber along the slide groove through the slider, and the connecting pipe is connected to the valve and the sealing strip is tightened; the compressor delivers refrigerant to the chamber through the water inlet pipe for cooling, and the vacuum chamber is kept warm; the airtightness of the valve is judged by observing whether bubbles are generated at low temperature through the observation window.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the testing box of this utility model;

[0021] Figure 3 This is a schematic diagram of the detection box structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the support device structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the clamping component structure of this utility model;

[0024] Figure 6 For the present utility model Figure 5 Enlarged view of point A in the middle.

[0025] As shown in the figure: 100, detection box; 101, movable cover; 102, sealing strip; 103, vacuum chamber; 104, slide groove; 105, observation window; 106, water inlet pipe; 107, drain pipe; 108, connecting pipe; 200, support device; 210, support assembly; 211, support plate; 212, long groove; 220, slider; 300, clamping and fixing device; 310, moving assembly; 311, round rod; 312, spring one; 313, moving plate; 314, moving block; 320, clamping assembly; 321, connecting plate; 322, clamping plate; 323, limiting groove; 324, slide rod; 325, spring two; 326, sliding plate; 327, top plate. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0027] The following description, in conjunction with the accompanying drawings, describes a valve sealing detection device under low-temperature conditions according to an embodiment of the present invention.

[0028] like Figures 1-6 As shown in the figure, a valve sealing test device under low temperature environment according to an embodiment of the present invention may include a test box 100, a support device 200 for placing the valve is provided in the test box 100, a clamping and fixing device 300 for clamping and fixing the valve is provided in the support device 200, a vacuum chamber 103 for heat insulation is provided in the test box 100, and a slide groove 104 for restricting the support device 200 is provided in the test box 100. The support device 200 includes a support component 210 for supporting the valve provided in the test box 100, and sliders 220 for sliding in the slide groove 104 are fixedly installed at the left and right ends of the support component 210. The clamping and fixing device 300 includes a moving component 310 for moving provided in the support component 210, and a clamping component 320 for clamping and fixing the valve is provided on the moving component 310.

[0029] In one embodiment of this utility model, such as Figure 2 and Figure 3 As shown, a movable cover 101 for tightly closing the test box 100 is movably connected to the top of the test box 100. The movable cover 101 is connected to the test box 100 via a hinge. A sealing strip 102 for sealing the test box 100 is fixedly installed on the top of the movable cover 101. Therefore, by using the movable cover 101 to tightly close the test box 100 and using the sealing strip 102 on the movable cover 101 to seal the gap between the movable cover 101 and the test box 100, cold air inside the test box 100 can be prevented from escaping. An observation window 105 for observing the inside of the test box 100 is provided at the front end of the test box 100. The observation window 105 is made of transparent material, so it can be used to observe whether the valve inside the test box 100 leaks air when operating at low temperature.

[0030] Furthermore, a water inlet pipe 106 for supplying refrigerant into the test chamber 100 is provided at the right end of the test chamber 100. Below the water inlet pipe 106 is a connecting pipe 108 for connecting to valves on the support device 200, with the other end of the connecting pipe 108 connected to an external air valve. A drain pipe 107 for discharging cooling water from the test chamber 100 is also provided at the right end of the test chamber 100. The drain pipe 107 has a built-in control switch, allowing it to be opened and the waste liquid in the test chamber 100 to be discharged. Therefore, when a low-temperature airtightness test of the valve is required, the valve can be discharged through the support device 200. The device 200 is used to place the valve, and the clamping and fixing device 300 is used to clamp and fix the valve to prevent the liquid in the test chamber 100 from affecting the valve's sway. The connecting pipe 108 is then connected to the valve, and the test chamber 100 is sealed tightly by the sealing strip 102 on the movable cover 101. The refrigerant is then transported into the test chamber 100 through the water inlet pipe 106 by an external compressor for low-temperature operation. At the same time, the vacuum chamber 103 is used to maintain the heat preservation effect of the test chamber 100. The airtightness of the valve during low-temperature operation is judged by observing whether air bubbles appear in the valve in the test chamber 100 through the observation window 105.

[0031] In one embodiment of this utility model, such as Figure 4 As shown, the support assembly 210 includes a support plate 211 disposed inside the detection box 100 for placing the valve. The support plate 211 has two long grooves 212, which are symmetrically distributed on the support plate 211. Thus, when the support plate 211 needs to be placed into the detection box 100, it can be placed into the detection box 100 along the grooves 104 by the sliders 220 at the left and right ends of the support plate 211.

[0032] In one embodiment of this utility model, such as Figure 4 , Figure 5 and Figure 6 As shown, the moving assembly 310 includes a round rod 311 fixedly installed in the elongated groove 212. A moving block 314 for moving is fitted on the rod body of the round rod 311. A moving plate 313 is fixedly installed on the top of the moving block 314. A spring 312 for driving the moving plate 313 to move is fitted on the rod body of the round rod 311. Therefore, the elasticity of the spring 312 can be used to drive the moving block 314 to move along the round rod 311 in the elongated groove 212, thereby driving the two opposing moving plates 313 to move towards each other.

[0033] Furthermore, the clamping assembly 320 includes a connecting plate 321 fixedly installed on the end of the movable plate 313 away from the spring 312. A clamping plate 322 for clamping and fixing the valve is fixedly installed on the end of the connecting plate 321 away from the movable plate 313. Two limiting grooves 323 are formed on the plate body of the clamping plate 322.

[0034] Furthermore, a slide rod 324 is fixedly installed within the limiting groove 323. A sliding plate 326 for vertical movement is fitted onto the slide rod 324. A top plate 327 for clamping and fixing the valve is fixedly installed at the end of the sliding plate 326 away from the clamping plate 322. A second spring 325 for cooperating with the sliding plate 326 is fitted onto the slide rod 324. Thus, when clamping and fixing the valve placed on the support plate 211, the two moving plates 313 can be driven to move in opposite directions. At the same time, the moving block 314 at the bottom of the moving plate 313 moves away from the round rod 311 within the long groove 212, compressing the first spring 312 fitted onto the round rod 311. The valve is placed on the support plate 211. At this time, the two movable plates 313 are released, and under the elastic action of the first spring 312, the two movable plates 313 can be driven to move towards each other, and the two clamping components 320 are controlled to clamp and fix the valve. Then, by pulling the top plate 327 upward, the slide plate 326 moves upward along the slide rod 324, and the second spring 325 fitted on the slide rod 324 is stretched. Then, the tension on the top plate 327 is released. At this time, under the elastic action of the second spring 325, the top plate 327 can be driven to clamp and fix the valve from top to bottom, so as to prevent the valve on the support plate 211 from moving in the test box 100 and causing the valve's airtightness test result to fail to meet the standard.

[0035] In summary, this utility model provides a valve sealing test device for low-temperature environments. When a valve needs to be tested for low-temperature airtightness, two moving plates 313 are driven to move in opposite directions. Simultaneously, the moving block 314 at the bottom of the moving plates 313 moves away from each other along the round rod 311 in the long groove 212, compressing the spring 312 mounted on the round rod 311. The valve is then placed on the support plate 211. At this point, the two moving plates 313 are released, and under the elastic action of the spring 312, the two moving plates 313 are driven to move towards each other, controlling the two clamping components 320 to clamp and fix the valve. Furthermore, by pulling the top plate 327 upwards, the slide plate 326 moves upwards along the slide rod 324, compressing the spring 312 mounted on the slide rod 324. The spring 325 is stretched, and then the tension on the top plate 327 is released. At this time, under the elastic action of the spring 325, the top plate 327 can be driven to clamp and fix the valve from the top and bottom. Then, the sliders 220 at both ends of the support plate 211 are placed into the test chamber 100 along the slide groove 104. The connecting pipe 108 is then connected to the valve, and the sealing strip 102 on the movable cover 101 is used to seal the test chamber 100 tightly. The refrigerant is then transported into the test chamber 100 through the water inlet pipe 106 by the external compressor for low-temperature operation. At the same time, the vacuum chamber 103 is used to maintain the heat preservation effect of the test chamber 100. At the same time, the air tightness of the valve is judged by observing whether air bubbles appear in the test chamber 100 through the observation window 105.

[0036] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve sealing detection device under low-temperature conditions, comprising a detection chamber (100), characterized in that: The testing box (100) is provided with a support device (200) for placing the valve, and a clamping and fixing device (300) for clamping and fixing the valve is provided in the support device (200). The testing box (100) is provided with a vacuum chamber (103) for heat insulation, and a slide groove (104) for restricting the support device (200) is provided in the testing box (100). The support device (200) includes a support assembly (210) provided in the testing box (100) for supporting the valve. The left and right ends of the support assembly (210) are fixedly installed with sliders (220) for sliding in the slide groove (104). The clamping and fixing device (300) includes a moving assembly (310) provided in the support assembly (210) for moving, and a clamping assembly (320) for clamping and fixing the valve is provided on the moving assembly (310).

2. The valve sealing detection device under low-temperature environment according to claim 1, characterized in that: The top of the test box (100) is movably connected to a movable cover (101) for sealing the test box (100). A sealing strip (102) for sealing the test box (100) is fixedly installed on the top of the movable cover (101). An observation window (105) for observing the inside of the test box (100) is opened at the front end of the test box (100).

3. The valve sealing detection device under low-temperature environment according to claim 2, characterized in that: The right end of the test box (100) is provided with a water inlet pipe (106) for adding refrigerant into the test box (100), and a connecting pipe (108) for connecting the valve on the support device (200) is provided below the water inlet pipe (106). The right end of the test box (100) is provided with a drain pipe (107) for discharging the cooling water in the test box (100).

4. The valve sealing detection device under low-temperature environment according to claim 1, characterized in that: The support assembly (210) includes a support plate (211) disposed inside the detection box (100) for placing the valve, and the support plate (211) has two elongated slots (212) formed on its body.

5. The valve sealing detection device under low-temperature environment according to claim 4, characterized in that: The moving component (310) includes a round rod (311) fixedly installed in a long slot (212). A moving block (314) for moving is fitted on the rod body of the round rod (311). A moving plate (313) is fixedly installed on the top of the moving block (314). A spring (312) for driving the moving plate (313) to move is fitted on the rod body of the round rod (311).

6. The valve sealing detection device under low-temperature environment according to claim 5, characterized in that: The clamping assembly (320) includes a connecting plate (321) fixedly installed on the end of the movable plate (313) away from the spring (312). A clamping plate (322) for clamping and fixing the valve is fixedly installed on the end of the connecting plate (321) away from the movable plate (313). Two limiting grooves (323) are provided on the plate body of the clamping plate (322).

7. A valve sealing detection device under low-temperature environment according to claim 6, characterized in that: A slide rod (324) is fixedly installed in the limiting groove (323). A sliding plate (326) for moving up and down is fitted on the slide rod (324). A top plate (327) for clamping and fixing the valve is fixedly installed at the end of the sliding plate (326) away from the clamping plate (322). A spring (325) for cooperating with the sliding plate (326) is fitted on the slide rod (324).

Images