A tool for testing the flatness of the valve seat sealing surface of a large-diameter gate valve.

Abstract

This invention relates to the field of large-diameter gate valve seat sealing surface flatness testing technology, and discloses a testing tool for the flatness of the sealing surface of a large-diameter gate valve seat. The tool includes a panel, with a gate valve seat mounted on the top of the panel. The testing components include an L-shaped support rod mounted on the top of the panel, a telescopic rod fixed to the inner wall of the top of the L-shaped support rod, and a calibration component mounted on the outer wall of the telescopic rod. A micro motor is fixedly connected to the bottom of the telescopic rod, and a connecting base plate is fixedly connected to the output end of the micro motor. A testing fixing base is fixedly connected to the bottom of the connecting base plate, and a knife-edge ruler is fixed to the bottom of the testing fixing base. The testing fixing base has a hollow interior design. Compared with the prior art, this application can achieve the testing of the sealing surface flatness of the gate valve seat, and can also simultaneously test the flatness of the inner wall of the gate valve seat, improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing technology for the flatness of the sealing surface of a large-diameter gate valve seat, specifically a testing tool for the flatness of the sealing surface of a large-diameter gate valve seat. Background Technology

[0002] Large-diameter gate valves are widely used in petroleum, chemical, and water conservancy industries. The flatness of the valve seat sealing surface directly affects the valve's sealing performance and service life.

[0003] Traditional methods for testing the flatness of the sealing surface of large-diameter gate valve seats include conventional contact measurements and some simple optical measurement methods. During the testing process, the measuring probe needs to contact the sealing surface. Due to the large area of ​​the sealing surface of large-diameter valve seats, the measurement process is cumbersome and inefficient. Moreover, the pressure of the probe may cause some damage to the sealing surface, affecting its accuracy and service life. At the same time, contact testing is affected by human factors, and the measurement results will be biased. In addition, existing simple optical measurements are affected by environmental factors, which will also affect the measurement results. Therefore, we propose a tool for testing the flatness of the sealing surface of large-diameter gate valve seats. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a tool for detecting the flatness of the sealing surface of a large-diameter gate valve seat. It has the advantages of accurately detecting the flatness of the sealing surface and being unaffected by environmental factors. It solves a series of problems in existing technologies, such as the need for frequent contact with the sealing surface, which leads to damage to the sealing surface, and the influence of environmental factors during the detection process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tool for detecting the flatness of the sealing surface of a large-diameter gate valve seat, comprising,

[0006] A panel, the top of which is fitted with a gate valve seat;

[0007] A displacement assembly for fixing a gate valve seat;

[0008] The detection component is used to detect the flatness of the gate valve seat base. The detection component includes an L-shaped support rod mounted on the top of the panel. A telescopic rod is fixed to the inner top wall of the L-shaped support rod, and a calibration component is installed on the outer wall of the telescopic rod. A micro motor is fixedly connected to the bottom of the telescopic rod, and a connecting base plate is fixedly connected to the output end of the micro motor. A detection fixing base is fixedly connected to the bottom of the connecting base plate, and a knife-edge ruler is fixed to the bottom of the detection fixing base. The detection fixing base has a hollow interior design, and a second threaded rod is rotatably connected inside the detection fixing base. A third threaded block is threadedly connected to the outer wall of the second threaded rod. Connecting rods are symmetrically fixed to the left and right sides of the third threaded block. A first fixing rod is fixed to the bottom of the left connecting rod, and a light source catcher is fixed to the end of the first fixing rod near the knife-edge ruler. A second fixing rod is fixed to the bottom of the right connecting rod, and a high-intensity light emitter is fixed to the end of the second fixing rod near the knife-edge ruler.

[0009] Preferably, the calibration assembly includes a base sleeved on the outer wall of the telescopic rod, two sets of signal acquisition devices are fixed at equal intervals on the outer wall of the base, and several laser emitters are fixed at equal intervals on the bottom of the base. The front and rear outer walls of the detection and fixing base are symmetrically provided with through slots, the connecting rod is adapted to the through slots, and the connecting rod is slidably disposed on the inner wall of the through slots. A fourth motor is fixed on the left outer wall of the detection and fixing base, and the output end of the fourth motor is connected to the second threaded rod.

[0010] Preferably, a second rotating shaft is fixedly connected to the bottom right side of the connecting base plate. The outer wall of the second rotating shaft is provided with a shaped groove. A detection rod is fixed to the inner wall of the shaped groove. The detection rod is adapted to the inner wall of the gate valve seat. The knife-edge ruler is adapted to the top of the gate valve seat.

[0011] Preferably, two sets of second fixing blocks are symmetrically fixed on the top right side of the panel. The two sets of second fixing blocks are rotatably connected to a first threaded rod on their opposite sides. The outer wall of the first threaded rod is threaded with a second threaded block. The top of the second threaded block is fixedly connected to the bottom of the L-shaped support rod. A third motor is fixedly connected to the outer wall of the second fixing block on the front side. The output end of the third motor is fixedly connected to the second fixing block.

[0012] Preferably, the displacement assembly includes four sets of first fixing blocks symmetrically fixed to the top of the panel. The two sets of first fixing blocks on the front side are rotatably connected to bidirectional lead screws on their facing sides, and the two sets of first fixing blocks on the rear side are rotatably connected to bidirectional lead screws on their facing sides. The two sets of bidirectional lead screws are symmetrically arranged, and the outer walls of the two sets of bidirectional lead screws are symmetrically threaded with two sets of first threaded blocks. A stop block is fixedly connected at the center of the two sets of bidirectional lead screws.

[0013] Preferably, H-shaped support columns are fixedly connected to the top of the two first threaded blocks on the left side, and H-shaped support columns are fixedly connected to the top of the two sets of first threaded blocks on the right side. The two sets of H-shaped support columns are symmetrically arranged. Two sets of second motors are symmetrically fixed to the outer wall of the opposite side of the two sets of H-shaped support columns. Two sets of first rotating shafts are symmetrically rotatably connected to the facing side of the two sets of H-shaped support columns. The output ends of the two sets of second motors correspond one-to-one with the first rotating shafts and are fixedly connected. Arc-shaped clamps are symmetrically fixedly connected to the facing side of the two sets of first rotating shafts. The two sets of arc-shaped clamps are adapted to the gate valve seat.

[0014] Preferably, a first synchronous pulley is rotatably connected to the outer wall of the first fixed block located at the rear, and a second synchronous pulley is rotatably connected to the outer wall of the first fixed block located at the front. The second synchronous pulley and the first synchronous pulley are connected by a synchronous belt. A first motor is fixedly connected to the outer wall of the first fixed block located at the rear, and the output end of the first motor is fixedly connected to the first synchronous pulley.

[0015] Preferably, the first synchronous pulley is coaxially and fixedly connected to the rear bidirectional lead screw, the second synchronous pulley is coaxially and fixedly connected to the front bidirectional lead screw, and four sets of support columns are symmetrically fixed around the bottom of the panel.

[0016] Compared with the prior art, the present invention provides a tool for detecting the flatness of the valve seat sealing surface of a large-diameter gate valve, which has the following beneficial effects:

[0017] 1. A tool for testing the flatness of the sealing surface of a large-diameter gate valve seat, comprising a panel, a displacement assembly, etc. In use, the gate valve seat is placed between two sets of arc-shaped clamping plates. The first motor is then started, causing the first synchronous pulley to drive the second synchronous pulley to rotate synchronously via a synchronous belt. This causes the two sets of bidirectional lead screws to rotate synchronously. When the two sets of first fixed blocks rotate synchronously, the four sets of first threaded blocks move synchronously. At this time, the H-shaped support column at the top of the first threaded blocks, along with the arc-shaped clamping plates, gradually clamps and fixes the gate valve seat. The testing assembly then detects the flatness of the sealing surface. After the test is completed, the two sets of second motors can be started to flip the gate valve seat over and test the flatness of the other end. This design enables rapid fixing and flipping of the gate valve seat, improving testing efficiency.

[0018] 2. A tool for detecting the flatness of the sealing surface of a large-diameter gate valve seat. This tool includes a panel and detection components. In use, after the gate valve seat is fixed, a telescopic rod is activated, bringing a knife-edge ruler into contact with the sealing surface. After contact, a high-intensity light emitter and a light source catcher are activated. The high-intensity light emitter illuminates the knife-edge ruler, while the light source catcher on the other side captures the light source to determine if the flatness of the sealing surface meets requirements. Next, a fourth motor is activated, causing the high-intensity light emitter and light source catcher to move along the knife-edge ruler, improving detection efficiency. Simultaneously, a micro motor is activated, causing the knife-edge ruler to rotate around the top of the gate valve seat. It should be noted that a second rotating shaft is located at the bottom of the connecting base plate, and a detection rod is fixed to the bottom of the second rotating shaft. The detection rod can detect the inner wall of the gate valve seat to determine if the inner wall is flat. Through this design, the flatness of the sealing surface of the gate valve seat can be detected, and the flatness of the inner wall of the gate valve seat can also be detected, improving detection efficiency.

[0019] 3. A testing tool for the flatness of the sealing surface of a large-diameter gate valve seat. By setting up a panel and testing components, after the gate valve seat is fixed, a third motor is activated to move the L-shaped support rod carrying the testing component. When the L-shaped support rod reaches the top of the gate valve seat, a laser emitter is activated. The light refracted back from the top of the gate valve seat is captured by a signal acquisition device. This design allows the testing component to be positioned at the center of the gate valve seat, facilitating more accurate testing. Through this design, the testing component can be quickly fixed at the center of the gate valve seat. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the installation structure of the detection component of the present invention;

[0022] Figure 3 This is a schematic diagram of a partial structure of the detection component of the present invention;

[0023] Figure 4 This is a schematic diagram of the detection component structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the mounting structure of the testing and fixing base of the present invention;

[0025] Figure 6 This is a schematic diagram of the mounting structure of the knife-edge ruler of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the testing and fixing base of the present invention;

[0027] Figure 8This is a schematic diagram of the displacement component structure of the present invention;

[0028] Figure 9 This is a partial structural diagram of the displacement component of the present invention.

[0029] In the diagram: 1. Panel; 2. Displacement assembly; 3. Detection assembly; 4. Support column; 5. First motor; 6. First synchronous pulley; 7. Synchronous belt; 8. Second synchronous pulley; 9. First fixing block; 10. Double-acting lead screw; 11. First threaded block; 12. Stop block; 13. Second motor; 14. H-shaped support column; 15. Gate valve seat; 16. First rotating shaft; 17. Arc-shaped clamp; 18. Third motor; 19. Second fixing block; 20. First threaded rod; 21. Second threaded block; 22. 23. L-shaped support rod; 24. Telescopic rod; 25. Detection rod; 26. Signal collector; 27. Laser emitter; 28. Base; 29. ​​Micro motor; 30. Second rotating shaft; 31. Irregular groove; 32. Fourth motor; 33. Detection fixing base; 34. Connecting base plate; 35. First fixing rod; 36. Light source catcher; 37. Knife-edge ruler; 38. Connecting rod; 39. Second fixing rod; 40. High-intensity light emitter; 41. Through groove; 42. Second threaded rod; 43. Third threaded block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a tool for detecting the flatness of the valve seat sealing surface of a large-diameter gate valve.

[0032] In one typical implementation of this application, such as Figure 1-9 As shown, a tool for testing the flatness of the sealing surface of a large-diameter gate valve seat includes a panel 1, a gate valve seat 15 mounted on the top of the panel 1, and a displacement assembly 2 for fixing the gate valve seat 15.

[0033] After the gate valve seat 15 is placed on the panel 1, the gate valve seat 15 can be fixed by adjusting the displacement component 2. It should be noted that the displacement component 2 can fix and clamp gate valve seats 15 of different sizes.

[0034] In a preferred embodiment of this invention, the displacement component 2 includes four sets of first fixing blocks 9 symmetrically fixed to the top of the panel 1. Two sets of first fixing blocks 9 on the front side are rotatably connected to bidirectional lead screws 10 on their facing sides, and two sets of first fixing blocks 9 on the rear side are also rotatably connected to bidirectional lead screws 10 on their facing sides. The two sets of bidirectional lead screws 10 are symmetrically arranged, and two sets of first threaded blocks 11 are symmetrically threaded onto the outer walls of each set of bidirectional lead screws 10. A stop block 12 is fixedly connected to the center of each set of bidirectional lead screws 10. H-shaped support columns 14 are fixedly connected to the top of the two sets of first threaded blocks 11 on the left side, and H-shaped support columns 14 are fixedly connected to the top of the two sets of first threaded blocks 11 on the right side. The two sets of H-shaped support columns 14 are symmetrically arranged, and two sets of second motors 13 are symmetrically fixed to the outer walls of the opposite sides of the two sets of H-shaped support columns 14. Two sets of first rotating shafts 16 are symmetrically rotatably connected to the opposing sides of the support column 14. The output ends of the two sets of second motors 13 are corresponding to and fixedly connected to the first rotating shafts 16. Arc-shaped clamps 17 are symmetrically fixedly connected to the opposing sides of the two sets of first rotating shafts 16. The two sets of arc-shaped clamps 17 are adapted to the gate valve seat 15. The outer wall of the first fixed block 9 on the rear side is rotatably connected to the first synchronous wheel 6. The outer wall of the first fixed block 9 on the front side is rotatably connected to the second synchronous wheel 8. The second synchronous wheel 8 and the first synchronous wheel 6 are connected by a synchronous belt 7. The outer wall of the first fixed block 9 on the rear side is fixedly connected to the first motor 5. The output end of the first motor 5 is fixedly connected to the first synchronous wheel 6. The first synchronous wheel 6 is coaxially fixedly connected to the rear double-acting screw 10. The second synchronous wheel 8 is coaxially fixedly connected to the front double-acting screw 10. Four sets of support columns 4 are symmetrically fixed around the bottom of the panel 1.

[0035] In the above description, when the gate valve seat 15 is placed between the two sets of arc-shaped clamps 17, the first motor 5 is started, driving the first synchronous pulley 6 to rotate. The first synchronous pulley 6 is connected to the second synchronous pulley 8 via a synchronous belt 7. Therefore, when the first synchronous pulley 6 rotates, the second synchronous pulley 8 rotates synchronously. Note that the first synchronous pulley 6 and the second synchronous pulley 8 are coaxially fixed to the two sets of bidirectional lead screws 10, respectively. Therefore, the two sets of bidirectional lead screws 10 rotate synchronously. Four sets of first threaded blocks 11 are provided on the outer wall of the two sets of bidirectional lead screws 10. An H-shaped support column 14 is provided on the top of the two sets of first threaded blocks 11 on one side. Similarly, an H-shaped support column 14 is also designed on the top of the two sets of first threaded blocks 11 on the other side. The two sets of H-shaped support columns 14 are symmetrically arranged, and their moving speeds are the same. Two sets of first rotating shafts 16 are provided on the outer wall of the opposite side of 14. The first rotating shafts 16 are fixedly connected to the arc-shaped clamps 17. A second motor 13 is connected to the end of the first rotating shaft 16 away from the arc-shaped clamps 17. This design allows the gate valve seat 15 to be rotated under the drive of the two sets of second motors 13 after the detection component 3 has completed the detection of the gate valve seat 15. After rotating 180°, the detection component 3 can detect the other side of the gate valve seat 15. This design can improve the efficiency of detection and reduce the cost of labor. After the detection is completed, the gate valve seat 15 is fixed by the two sets of arc-shaped clamps 17 and removed. Finally, it should be mentioned that the arc-shaped clamps 17 can clamp and fix different models of gate valve seats 15. Therefore, this detection can be performed on different models of gate valve seats 15, improving the diversity of detection.

[0036] Furthermore, in the above scheme, two sets of second fixing blocks 19 are symmetrically fixed on the top right side of panel 1. The two sets of second fixing blocks 19 are rotatably connected to the facing side of the first threaded rod 20. The outer wall of the first threaded rod 20 is threadedly connected to the second threaded block 21. The top of the second threaded block 21 is fixedly connected to the bottom of the L-shaped support rod 22. The outer wall of the front second fixing block 19 is fixedly connected to the third motor 18. The output end of the third motor 18 is fixedly connected to the second fixing block 19.

[0037] After the arc-shaped clamp 17 fixes the gate valve seat 15, the third motor 18 is started. The third motor 18 drives the first threaded rod 20 to rotate, causing the second threaded block 21 to move along the L-shaped support rod 22. When the L-shaped support rod 22, carrying the detection component 3, reaches the top of the gate valve seat 15, the three sets of laser emitters 26 are activated. The laser emitters 26 project lasers onto the edge of the gate valve seat 15. The reflected light is captured by the signal acquisition unit 25. The signal acquisition unit 25 analyzes the data and transmits the signal to the third motor 18, so that the L-shaped support rod 22, carrying the detection component 3, is at the center of the gate valve seat 15. This design can improve the detection efficiency. When the detection component 3 is at the center of the gate valve seat 15, the laser emitter 26 will stop working, and similarly, the third motor 18 will also stop working.

[0038] In this embodiment, the detection component 3 is used to detect the flatness of the gate valve seat 15 base. The detection component 3 includes an L-shaped support rod 22 installed on the top of the panel 1. A telescopic rod 23 is fixed to the inner wall of the top of the L-shaped support rod 22, and a calibration component is installed on the outer wall of the telescopic rod 23. A micro motor 29 is fixedly connected to the bottom of the telescopic rod 23. A connecting base plate 34 is fixedly connected to the output end of the micro motor 29. A detection fixing base 33 is fixedly connected to the bottom of the connecting base plate 34. A knife-edge ruler 37 is fixed to the bottom of the detection fixing base 33. The interior of the detection fixing base 33 is hollow. A second threaded rod 42 is rotatably connected inside the detection fixing base 33. A third threaded block 43 is threadedly connected to the outer wall of the second threaded rod 42. Connecting rods 38 are symmetrically fixed to the left and right sides of the third threaded block 43. A first fixing rod 35 is fixed to the bottom of the left connecting rod 38. A light source catcher 36 is fixed to the end of the first fixing rod 35 near the knife-edge ruler 37. A second fixing rod 39 is fixed to the bottom of the right connecting rod 38. A strong light emitter 40 is fixed to the end of the second fixing rod 39 near the knife-edge ruler 37. The calibration assembly includes a base 27 sleeved on the outer wall of the telescopic rod 23. Two sets of signal acquisition devices 25 are fixed at equal intervals on the outer wall of the base 27. Several laser emitters 26 are fixed at equal intervals on the bottom of the base 27. Through slots 41 are symmetrically opened on the front and rear outer walls of the detection fixing base 33. The connecting rod 38 is adapted to the through slot 41. The connecting rod 38 is slidably set on the inner wall of the through slot 41. A fourth motor 32 is fixed to the left outer wall of the detection fixing base 33. The output end of the fourth motor 32 is connected to the second threaded rod 42. A second rotating shaft 30 is fixedly connected to the bottom right side of the connecting base plate 34. A special groove 31 is opened on the outer wall of the second rotating shaft 30. A detection rod 24 is fixed to the inner wall of the special groove 31. The detection rod 24 is adapted to the inner wall of the gate valve seat 15. The knife-edge ruler 37 is adapted to the top of the gate valve seat 15.

[0039] When the detection component 3 is at the center of the gate valve seat 15, the telescopic rod 23 is activated. The activation of the telescopic rod 23 causes the knife-edge ruler 37 to adhere to the top of the gate valve seat 15. After this adhesion, the telescopic rod 23 is stopped, and the micro motor 29 is activated. The activation of the micro motor 29 causes the connecting base plate 34 to rotate around the top of the gate valve seat 15. Simultaneously, the knife-edge ruler 37 rotates synchronously. While the knife-edge ruler 37 rotates, the high-intensity light emitters 40 on both sides of the knife-edge ruler 37 and the first fixing rod 3... 5 will start synchronously, and under the output of the fourth motor 32, the high-intensity light emitter 40 and the light source catcher 36 will reciprocate along the knife-edge ruler 37 until the knife-edge ruler 37 stops after circling the top of the gate valve seat 15. During this period, the light intensity of the high-intensity light emitter 40 will be aimed at the contact surface between the knife-edge ruler 37 and the gate valve seat 15. At the same time, on the other side, the light source catcher 36 will transmit light through the gap between the contact surface of the knife-edge ruler 37 and the gate valve seat 15. By observing the intensity of the light through the gap, the gate valve seat 15 can be judged. Regarding the surface flatness, it's worth mentioning that a second rotating shaft 30 is located at the bottom right side of the connecting base plate 34. A detection rod 24 is installed on the outer right side wall of the second rotating shaft 30. While the knife-edge ruler 37 checks the top of the gate valve seat 15, the detection rod 24 checks the inner wall of the gate valve seat 15. When the inside of the gate valve seat 15 is uneven, the detection rod 24 will sound an alarm and alert the operator. This design effectively improves detection efficiency and ensures the gate valve seat 15 maintains its seal during subsequent use. Finally, it should be noted that the detection rod 24 and the knife-edge ruler 37 are aligned, allowing both to complete a 360° rotation after one revolution. After the detection assembly 3 completes its inspection, the third motor 18 is restarted, moving the L-shaped support rod 22 away from the gate valve seat 15 and stopping. After the gate valve seat 15 is flipped over, the above steps are repeated to check the flatness of the other side of the gate valve seat 15. This design significantly improves work efficiency.

[0040] The working principle of this invention is as follows: After the gate valve seat 15 is fixed in place by the arc-shaped clamp 17, the third motor 18 is started. The third motor 18 drives the first threaded rod 20 to rotate, causing the second threaded block 21 to move along the L-shaped support rod 22. When the L-shaped support rod 22, carrying the detection component 3, reaches the top of the gate valve seat 15, three sets of laser emitters 26 are activated. The laser emitters 26 project laser light onto the edge of the gate valve seat 15. The reflected light is captured by the signal acquisition unit 25. The signal acquisition unit 25 analyzes the data and transmits the signal to the third motor 18, so that the L-shaped support rod 22, carrying the detection component 3, is positioned at the center of the gate valve seat 15. This design can improve the detection efficiency. When the detection component 3 is at the center of the gate valve seat 15, the laser emitter 26 will stop working. Similarly, the third motor 18 will also stop working. When the detection component 3 is at the center of the gate valve seat 15, the telescopic rod 23 will be activated. The activation of the telescopic rod 23 will cause the knife-edge ruler 37 to be fixedly attached to the top of the gate valve seat 15. After the attachment, the telescopic rod 23 will be stopped. At this time, the micro motor 29 will be activated. After the micro motor 29 is activated, the connecting base plate 34 will rotate around the top of the gate valve seat 15. At this time, the knife-edge ruler 37 will rotate synchronously. While the knife-edge ruler 37 is rotating, the high-intensity light emitters 40 on both sides of the knife-edge ruler 37 and the first fixing rod 35 will be activated synchronously. Furthermore, under the output of the fourth motor 32... The high-intensity light emitter 40 and the light source catcher 36 reciprocate along the knife-edge ruler 37 until the knife-edge ruler 37 completes one revolution around the top of the gate valve seat 15 and then stops. During this period, the light intensity of the high-intensity light emitter 40 is aligned with the contact surface between the knife-edge ruler 37 and the gate valve seat 15. Simultaneously, on the other side, the light source catcher 36 detects the light passing through the gap between the knife-edge ruler 37 and the gate valve seat 15. By analyzing the intensity of the light through the gap, it determines whether the surface of the gate valve seat 15 is flat. It should be noted that a second rotating shaft 30 is provided at the bottom right side of the connecting base plate 34. A detection rod 24 is provided on the outer right side of the second rotating shaft 30. While the knife-edge ruler 37 is detecting the top of the gate valve seat 15, the detection rod 24 is also detecting the gate valve seat 15. The inner wall of the gate valve seat 15 is inspected. When the inside of the gate valve seat 15 is uneven, the detection rod 24 will alarm and remind the staff. This design can effectively improve the inspection efficiency and ensure the gate valve seat 15 has a good seal during subsequent use. Finally, it should be noted that the detection rod 24 and the knife-edge ruler 37 are on a straight line. Therefore, after one revolution, both can complete a 360° rotation. After the detection component 3 completes the inspection, the third motor 18 is started again, moving the L-shaped support rod 22 away from the gate valve seat 15 and then stopping. After the gate valve seat 15 is flipped over, the above steps are repeated to inspect the flatness of the other side of the gate valve seat 15. This design can greatly improve work efficiency.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection tool for flatness of a seat sealing surface of a large-bore gate valve, characterized by: The utility model relates to a gate valve seat detection device, including, Panel, the top of panel is equipped with gate valve seat; Displacement assembly for the fixation of gate valve seat; Detection assembly for the detection of gate valve seat base flatness, the detection assembly includes the L-shaped support rod installed at the top of panel, the inner wall of the top of L-shaped support rod is fixed with telescopic rod, the outer wall of telescopic rod is equipped with calibration assembly;The bottom of telescopic rod is fixedly connected with micro motor, the output end of micro motor is fixedly connected with connecting bottom plate, the bottom of connecting bottom plate is fixedly connected with detection fixed base, the bottom of detection fixed base is fixed with knife edge ruler, the inside of detection fixed base is hollow design, the inside rotationally connected with second threaded rod of detection fixed base, the outer wall of second threaded rod is threadedly connected with third threaded block, the left and right sides of third threaded block are fixedly connected with connecting rod, the bottom of left connecting rod is fixed with first fixed rod, the one end of first fixed rod close to knife edge ruler is fixed with light source catcher, the bottom of right connecting rod is fixed with second fixed rod, the one end of second fixed rod close to knife edge ruler is fixed with strong light emitter; The calibration assembly includes the base of telescopic rod, the outer wall of base is fixed with two groups of signal collectors, the bottom of base is fixed with a plurality of laser emitters, the front and back outer walls of detection fixed base are symmetrically provided with through grooves, the connecting rod is matched with the through grooves, the connecting rod is slidably arranged on the inner wall of through groove, the left outer wall of detection fixed base is fixed with fourth motor, and the output end of fourth motor is connected with second threaded rod; The displacement assembly includes four groups of first fixed blocks fixed symmetrically on the top of panel, the opposite side of two groups of first fixed blocks on the front side is rotationally connected with bidirectional screw rod, the opposite side of two groups of first fixed blocks on the back side is rotationally connected with bidirectional screw rod, two groups of bidirectional screw rods are arranged symmetrically, and the outer wall of two groups of bidirectional screw rods is symmetrically threadedly connected with two groups of first threaded blocks, and the middle of two groups of bidirectional screw rods is fixedly connected with stop block; The top of two groups of first threaded blocks on the left side is fixedly connected with H-shaped support column, the top of two groups of first threaded blocks on the right side is fixedly connected with H-shaped support column, two groups of H-shaped support columns are arranged symmetrically, the outer wall of the opposite side of two groups of H-shaped support columns is fixedly connected with two groups of second motors, the opposite side of two groups of H-shaped support columns is rotationally connected with two groups of first rotation shafts, the output end of two groups of second motors is connected with first rotation shaft one by one, the opposite side of two groups of first rotation shafts is fixedly connected with arc clamps, and two groups of arc clamps are matched with gate valve seat.

2. A detection tool for flatness of a seat sealing surface of a large-diameter gate valve according to claim 1, characterized in that: The bottom right of connecting bottom plate is fixedly connected with second rotation shaft, the outer wall of second rotation shaft is provided with special-shaped groove, the inner wall of special-shaped groove is fixed with detection rod, the inner wall of detection rod is matched with gate valve seat, and the top of knife edge ruler is matched with gate valve seat.

3. A detection tool for flatness of seat sealing surface of a large-diameter gate valve according to claim 1, characterized in that: The top right side of the panel is symmetrically provided with two groups of second fixing blocks, the opposite side of the two groups of second fixing blocks is rotationally connected with a first threaded rod, the outer wall of the first threaded rod is threadedly connected with a second threaded block, the top of the second threaded block is fixedly connected with the bottom of an L-shaped supporting rod, the outer wall of the front second fixing block is fixedly connected with a third motor, and the output end of the third motor is fixedly connected with the second fixing block.

4. The tool for detecting the flatness of the sealing surface of the valve seat of a large-diameter gate valve according to claim 1, characterized in that: The outer wall of the rear first fixing block is rotationally connected with a first synchronous wheel, the outer wall of the front first fixing block is rotationally connected with a second synchronous wheel, the second synchronous wheel is connected with the first synchronous wheel through a synchronous belt, the outer wall of the rear first fixing block is fixedly connected with a first motor, and the output end of the first motor is fixedly connected with the first synchronous wheel.

5. A tool for detecting the flatness of the seat sealing surface of a large-bore gate valve according to claim 4, characterized in that: The first synchronous wheel is coaxially fixedly connected with the rear bidirectional screw rod, the second synchronous wheel is coaxially fixedly connected with the front bidirectional screw rod, and the bottom of the panel is symmetrically fixedly provided with four groups of supporting columns.

Images