A detection device and method for quality inspection of pressure valves in power plants

Abstract

The invention discloses a detection device and method for quality inspection of pressure valves in power plants, comprising a detection platform and a bracket; a water tank is arranged at the top of the detection platform, a bracket is fixedly installed between the two sides of the top of the detection platform, and racks are fixedly installed on both sides of the top of the bracket; the bracket is fixedly installed between the tops of the two racks, and second electric cylinders are fixedly installed on both sides of the top of the bracket; the output shaft ends of the two second electric cylinders pass downward through the top of the bracket to fix a pressure plate, the top of the pressure plate is connected to an air inlet pipe, and the bottom of the pressure plate is provided with an air inlet; a support plate and an air pipe are arranged on the bracket, an air outlet is arranged on the support plate, the bottom end of the air outlet is connected to the top of the air pipe, and the bottom of the air pipe passes through the bracket and extends into the water tank. The efficiency of air tightness detection of pressure valves is improved.

Description

Technical Field

[0001] The invention belongs to the field of pressure valve quality inspection, and relates to a detection device and method for quality inspection of pressure valves in power plants. Background Art

[0002] When pressure valves used in power plants are in use, their air tightness needs to be tested. When the common detection devices on the market are used, the test results are not intuitive enough and require various data comparisons to be understood. This will reduce the detection efficiency. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a detection device and method for quality inspection of pressure valves in power plants, thereby improving the efficiency of air tightness detection of pressure valves.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A testing device for quality inspection of pressure valves in power plants, comprising a testing platform and a bracket;

[0006] A water tank is provided at the top of the test bench, a bracket is fixedly installed between the two sides of the top of the test bench, and racks are fixedly installed on both sides of the top of the bracket; the bracket is fixedly installed between the tops of the two racks, and second electric cylinders are fixedly installed on both sides of the top of the bracket; the output shaft ends of the two second electric cylinders pass downward through the top of the bracket and a pressing plate is fixedly installed, the top of the pressing plate is connected to an air inlet pipe, and the bottom of the pressing plate is provided with an air inlet;

[0007] A support plate and an air pipe are arranged on the bracket, an air outlet is arranged on the support plate, the bottom end of the air outlet is connected to the top of the air pipe, and the bottom of the air pipe passes through the bracket and extends into the water tank.

[0008] Preferably, first electric cylinders are fixedly mounted on both sides of the frame, an output end of the first electric cylinder extends horizontally into the inner side of the frame, and a clamping plate is fixedly mounted on the output shaft end of the first electric cylinder.

[0009] Furthermore, rubber pads are fixedly installed on the inner walls of the two clamping plates.

[0010] Preferably, a plurality of first fixing rods are fixedly mounted on the bottom end of the pressing plate, and a plurality of second fixing rods are fixedly mounted on the top end of the supporting plate.

[0011] Preferably, a first sealing disk is fixedly mounted on the outer wall of the air inlet, and a second sealing disk is fixedly mounted on the outer wall of the air outlet.

[0012] Preferably, the air pipe is a bellows, and an air outlet pipe is fixedly mounted on the bottom end of the bellows.

[0013] Furthermore, connecting pieces are fixedly installed on both sides of the bottom end of the air pipe, and guide rods are fixedly installed on both sides of the bottom end of the bracket. The guide rods are movably connected to the connecting pieces, and a limiting sleeve is fixedly installed on the bottom end of the guide rods.

[0014] Furthermore, a handle is fixedly mounted on the bottom end of the bellows.

[0015] Preferably, an observation port is provided on one side of the middle portion of the water tank.

[0016] A method for detecting pressure valves in a power plant based on the device described in any one of the above items, first fixing one end of the valve body of the pressure valve to be detected on a support plate, then starting the second electric cylinders on both sides of the top of the bracket, the output shafts of the two second electric cylinders drive the pressure plate to press down to fix the valve body, connecting the air inlet pipe at the top of the pressure plate to an external air supply device, allowing compressed gas to enter the valve body, and judging the air tightness of the pressure valve by observing whether bubbles emerge from the bottom of the air pipe inside the water tank.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses a second electric cylinder to drive a pressure plate to fix the valve body and ventilate it. A water tank is set up and the air pipe inside the water tank is observed. When the valve body is not sealed well, the compressed gas will pass through the air inlet into the valve body, and then enter the air pipe through the air outlet, and finally blow gas through the bottom of the air pipe. At this time, bubbles will be generated in the water in the water tank. If bubbles are generated, it means that the valve body is not sealed well. By observing whether bubbles are generated, the detection structure can be quickly understood, thereby improving the detection efficiency.

[0019] Furthermore, by setting the first electric cylinder and the second electric cylinder, the first electric cylinders on the outer sides of the two frames are started. After the two first electric cylinders are started at the same time, their output shafts will drive the clamping plates to clamp the outer walls of the valve body on both sides. The second electric cylinders on both sides of the top of the bracket are started. The output shafts of the two second electric cylinders will drive the pressure plates to be pressed down. After the pressure plates are pressed down, they will drive the first fixing rods at the outer ring of the bottom end to be inserted into the outer ring of the top end of the valve body, thereby improving the stability of the lateral and lateral structures of the valve body to be tested.

[0020] Furthermore, by setting up a bellows, hold the handle at the bottom of the bellows and pull down the bellows until the air outlet pipe at the bottom of the bellows is completely immersed in the water tank, and then connect the air inlet pipe at the top of the pressure plate to the external air supply device. When the inspection is completed, the bellows can be lifted up, which is convenient for later replacement or cleaning of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the detection device for quality inspection of pressure valves in power plants of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the clamping part of the present invention;

[0023] Figure 3 For the present invention Figure 1 An enlarged schematic diagram of A in FIG.

[0024] Figure 4 For the present invention Figure 1 An enlarged schematic diagram of point B in FIG.

[0025] Figure 5 For the present invention Figure 2 An enlarged schematic diagram of point C in FIG.

[0026] Among them: 1. test table; 2. water tank; 3. bracket; 4. rack; 5. support; 6. second electric cylinder; 7. first electric cylinder; 8. bellows; 9. support plate; 10. air outlet; 11. air outlet pipe; 12. clamping plate; 13. rubber pad; 14. pressure plate; 15. first fixing rod; 16. second fixing rod; 17. air inlet pipe; 18. air inlet; 19. first sealing disk; 20. second sealing disk; 21. connecting piece; 22. guide rod; 23. limit sleeve; 24. observation port; 25. handle. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] like Figure 1 and Figure 2 As shown, the testing equipment for quality inspection of pressure valves in power plants according to the present invention comprises a testing platform 1, a bracket 5 and a support 3.

[0031] A water tank 2 is fixedly installed at the middle of the top of the testing platform 1 , a bracket 3 is fixedly installed between the two sides of the top of the testing platform 1 , and a frame 4 is fixedly installed on both sides of the top of the bracket 3 .

[0032] The bracket 5 is fixedly installed between the top ends of the two frames 4, and both ends of the bracket 5 are fixedly connected to the top ends of the two frames 4. The second electric cylinder 6 is fixedly installed on both sides of the top end of the bracket 5, and the first electric cylinder 7 is fixedly installed on both sides of the frames 4.

[0033] like Figure 4 As shown, an air pipe is fixedly installed at the middle of the top of the bracket 3 in the present invention. In this embodiment, the air pipe adopts a bellows 8. A support plate 9 is fixedly installed on the bracket 3 near the top of the bellows 8. An air outlet 10 is fixedly installed on the top of the support plate 9. The bottom end of the air outlet 10 is connected to the bellows 8. An air outlet pipe 11 is fixedly installed at the bottom end of the bellows 8. The bellows 8 passes through the bracket 3. A handle 25 is fixedly installed at the middle of the bottom end of the bellows 8 in the present invention. By setting the bellows 8, the handle 25 at the bottom end of the bellows 8 is held to pull down the bellows 8 until the air outlet pipe 11 at the bottom end of the bellows 8 is completely immersed in the water tank 2, and then the air inlet pipe 17 at the top of the pressure plate 14 is connected to the external air supply device. When the detection is completed, the bellows 8 can be lifted up, which is convenient for later replacement or cleaning of the water tank 2.

[0034] like Figure 3 As shown, in the present invention, the output shaft ends of the two first electric cylinders 7 are fixedly installed with clamps 12, and the inner walls of the two clamps 12 are fixedly installed with rubber pads 13. By setting the first electric cylinders 7, the first electric cylinders 7 on the outside of the two frames 4 are started. After the two first electric cylinders 7 are started at the same time, their output shafts will drive the clamps 12 to clamp the outer walls of the valve body on both sides, thereby improving the stability of the lateral structure of the valve body to be detected.

[0035] like Figure 3 As shown, in the present invention, a pressure plate 14 is fixedly installed at the output shaft end of the two second electric cylinders 6, a plurality of first fixing rods 15 are fixedly installed at the bottom end of the pressure plate 14, and a plurality of second fixing rods 16 are fixedly installed at the top end of the support plate 9. By setting the second electric cylinder 6 and starting the second electric cylinders 6 on both sides of the top end of the bracket 5, the output shafts of the two second electric cylinders 6 will drive the pressure plate 14 to be pressed down. After the pressure plate 14 is pressed down, it drives the first fixing rods 15 at the outer ring of its bottom end to be inserted into the outer ring of the top end of the valve body, thereby improving the stability of the longitudinal structure of the valve body to be inspected.

[0036] In the present invention, an air inlet pipe 17 is fixedly installed at the middle of the top end of the pressure plate 14 , and an air inlet port 18 is fixedly installed at the middle of the bottom end of the pressure plate 14 .

[0037] like Figure 5 As shown, in the present invention, a first sealing disk 19 is fixedly installed on the outer wall of the air inlet 18 , and a second sealing disk 20 is fixedly installed on the outer wall of the air outlet 10 .

[0038] In the present invention, connectors 21 are fixedly installed on both sides of the bottom end of the bellows 8, guide rods 22 are fixedly installed on both sides of the bottom end of the bracket 3, the guide rods 22 are movably connected to the connectors 21, and a limiting sleeve 23 is fixedly installed on the bottom end of the guide rods 22.

[0039] By setting up the water tank 2, an observation port 24 is set on one side of the middle part of the water tank 2. The air outlet pipe 11 inside the water tank 2 is observed through the observation port 24. When the valve body is not sealed enough, the compressed gas will pass through the air inlet 18 into the valve body, and then enter the bellows 8 through the air outlet 10. Finally, the gas is blown out through the bellows 8. At this time, bubbles will be generated in the water in the water tank 2. If bubbles are generated, it means that the valve body is not sealed enough. By observing whether bubbles are generated, the detection structure can be quickly understood, thereby improving the detection efficiency.

[0040] Testing method using the above-mentioned testing device for quality inspection of pressure valves in power plants:

[0041] Step 1: During testing, first, plug one end of the pressure valve body to be tested into the second fixing rod 16 on the support plate 9, then start the second electric cylinders 6 on both sides of the top of the bracket 5, and the output shafts of the two second electric cylinders 6 will drive the pressure plate 14 to press down. After the pressure plate 14 is pressed down, it drives the first fixing rod 15 at the outer ring of its bottom end to be plugged into the outer ring of the top of the valve body.

[0042] Step 2: After the top and bottom ends of the valve body are clamped, the first electric cylinders 7 on the outside of the two frames 4 are started. After the two first electric cylinders 7 are started at the same time, their output shafts will drive the clamping plates 12 to clamp the outer walls of the two sides of the valve body.

[0043] Step 3: After the valve body is completely clamped and fixed, hold the handle 25 at the bottom end of the bellows 8 to pull down the bellows 8 until the air outlet pipe 11 at the bottom end of the bellows 8 is completely immersed in the water tank 2.

[0044] Step 4: Then connect the air inlet pipe 17 at the top of the pressure plate 14 to the external air supply device, and the compressed gas enters the valve body. At this time, the air outlet pipe 11 inside the water tank 2 can be observed through the observation port 24.

[0045] Step 5: When the valve body is not airtight, the compressed gas will pass through the air inlet 18 into the valve body, and then enter the bellows 8 through the air outlet 10, and finally blow out the gas through the bellows 8. At this time, bubbles will appear in the water in the water tank 2. If bubbles appear, it means that the valve body is not airtight.

[0046] Working principle: During the inspection, first insert one end of the pressure valve body to be inspected into the second fixing rod 16 on the support plate 9, then start the second electric cylinders 6 on both sides of the top of the bracket 5, the output shafts of the two second electric cylinders 6 will drive the pressure plate 14 to press down, and after the pressure plate 14 is pressed down, it drives the first fixing rod 15 at the outer ring of its bottom end to be inserted into the outer ring of the top of the valve body. When the top and bottom ends of the valve body are clamped, start the first electric cylinders 7 on the outside of the two racks 4. After the two first electric cylinders 7 are started at the same time, their output shafts will drive the clamping plates 12 to clamp the outer walls of the two sides of the valve body. When the valve body is completely clamped and fixed, the handheld wave The handle 25 at the bottom end of the bellows 8 pulls down the bellows 8 until the air outlet pipe 11 at the bottom end of the bellows 8 is completely immersed in the water tank 2, and then the air inlet pipe 17 at the top end of the pressure plate 14 is connected to the external air supply device, and the compressed gas enters the valve body. At this time, the air outlet pipe 11 inside the water tank 2 can be observed through the observation port 24. When the valve body is not sealed enough, the compressed gas will pass through the air inlet 18 into the valve body, and then enter the bellows 8 through the air outlet 10. Finally, the gas is blown out through the bellows 8. At this time, bubbles will appear in the water in the water tank 2. If bubbles are generated, it means that the valve body is not sealed enough.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A detection device for quality inspection of pressure valves in power plants, characterized in that: It comprises a testing platform (1) and a bracket (5); A water tank (2) is provided at the top of the test bench (1); a bracket (3) is fixedly installed between the two sides of the top of the test bench (1); and a frame (4) is fixedly installed on both sides of the top of the bracket (3); a bracket (5) is fixedly installed between the tops of the two frames (4); and a second electric cylinder (6) is fixedly installed on both sides of the top of the bracket (5); the output shaft ends of the two second electric cylinders (6) pass downward through the top of the bracket (5) and a pressing plate (14) is fixedly installed thereon; the top of the pressing plate (14) is connected to an air intake pipe (17), and the bottom of the pressing plate (14) is provided with an air intake port (18); The bracket (3) is provided with a support plate (9) and an air pipe, the support plate (9) is provided with an air outlet (10), the bottom end of the air outlet (10) is connected to the top of the air pipe, and the bottom of the air pipe passes through the bracket (3) and extends into the interior of the water tank (2); A first electric cylinder (7) is fixedly mounted on both sides of the frame (4); an output end of the first electric cylinder (7) extends horizontally into the inner side of the frame (4); and a clamping plate (12) is fixedly mounted on an output shaft end of the first electric cylinder (7); The air pipe adopts a bellows (8), and an air outlet pipe (11) is fixedly installed at the bottom end of the bellows (8); Connecting pieces (21) are fixedly mounted on both sides of the bottom end of the air pipe, guiding rods (22) are fixedly mounted on both sides of the bottom end of the bracket (3), the guiding rods (22) are movably connected to the connecting pieces (21), and a limiting sleeve (23) is fixedly mounted on the bottom end of the guiding rods (22); A handle (25) is fixedly mounted on the bottom end of the bellows (8).

2. The detection device for quality inspection of pressure valves in power plants according to claim 1, characterized in that: Rubber pads (13) are fixedly mounted on the inner walls of the two clamping plates (12).

3. The detection device for quality inspection of pressure valves in power plants according to claim 1, characterized in that: A plurality of first fixing rods (15) are fixedly mounted on the bottom end of the pressing plate (14), and a plurality of second fixing rods (16) are fixedly mounted on the top end of the supporting plate (9).

4. The detection device for quality inspection of pressure valves in power plants according to claim 1, characterized in that: A first sealing disk (19) is fixedly mounted on the outer wall of the air inlet (18), and a second sealing disk (20) is fixedly mounted on the outer wall of the air outlet (10).

5. The detection device for quality inspection of pressure valves in power plants according to claim 1, characterized in that: An observation port (24) is provided on one side of the middle portion of the water tank (2).

6. A method for detecting a pressure valve in a power plant based on the device according to any one of claims 1 to 5, characterized in that: First, one end of the valve body of the pressure valve to be tested is fixed on the support plate (9), and then the second electric cylinders (6) on both sides of the top of the bracket (5) are started. The output shafts of the two second electric cylinders (6) drive the pressing plate (14) to press down, so that the valve body is fixed. The air inlet pipe (17) at the top of the pressing plate (14) is connected to an external air supply device, and compressed gas enters the interior of the valve body. By observing whether bubbles emerge from the bottom of the air pipe inside the water tank (2), the air tightness of the pressure valve is judged.

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