Automatic test system for pressure gauge

Abstract

The invention discloses a pressure gauge automatic test system which comprises a test instrument and a test tube arranged in the test instrument, and the test tube is provided with a contrast pressure gauge. A plurality of connecting branch pipes are arranged at the top of the testing pipe, the top end of each connecting branch pipe extends to the position above the testing instrument and is used for allowing a to-be-tested pressure gauge to be inserted, and a sealing ring is arranged on the end face of the top end of each connecting branch pipe and used for forming sealing with the inserted to-be-tested pressure gauge; the device further comprises a pressing device, the pressing device comprises a guide seat, a lifting rod and a driving air cylinder, the lifting rod is arranged in a vertical guide groove in the guide seat, the top end of the lifting rod is connected with a plurality of arc-shaped pressing plates through a support, and the arc-shaped pressing plates correspond to the connecting branch pipes one to one. A piston rod of the driving air cylinder extends into the vertical guide groove and is connected with the lifting rod. According to the automatic test system for the pressure gauges, a plurality of to-be-tested pressure gauges can be installed at the same time, and the detection efficiency is remarkably improved. In addition, the pressure gauge to be tested can be pressed tightly, and gas leakage in the testing process is prevented.

Description

Technical Field

[0001] This invention relates to an automated pressure gauge testing system. Background Technology

[0002] Pressure gauges, as important pressure measuring instruments, are widely used in various fields of industrial production and scientific experiments. Before leaving the factory or during periodic calibration, the accuracy of the pressure gauge readings needs to be tested.

[0003] Traditional pressure gauge testing typically involves manual testing of each gauge individually, which is inefficient and labor-intensive. Furthermore, the connection and sealing between the pressure gauge and the test pipeline often relies on manual tightening or simple crimping, resulting in insufficient sealing reliability and potential leaks that affect test accuracy.

[0004] Therefore, it is necessary to design corresponding technical solutions to solve the above problems. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides an automated pressure gauge testing system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution of the present invention is to design an automated pressure gauge testing system, including a testing instrument and a test tube disposed inside the testing instrument. One end of the test tube extends to the outside of the testing instrument and is provided with a reference pressure gauge. The top of the test tube is provided with multiple connecting branches, the top end of each connecting branch extending to the top of the testing instrument for insertion of the pressure gauge to be tested, and the top end face of the connecting branch is provided with a sealing ring for forming a seal with the inserted pressure gauge to be tested. The automated pressure gauge testing system also includes a clamping device, which includes a guide seat, a lifting rod, and a driving cylinder. The guide seat is located at the top rear end of the testing instrument and has a vertical guide groove inside. The lifting rod is located in the vertical guide groove, and the top end of the lifting rod is connected to multiple arc-shaped pressure plates via a bracket. Each arc-shaped pressure plate corresponds to a multiple connecting branch pipe, and each arc-shaped pressure plate is located directly above the corresponding connecting branch pipe. The driving cylinder is located inside the testing instrument, and the piston rod of the driving cylinder extends into the vertical guide groove and is connected to the lifting rod.

[0007] Preferably, a limiting protrusion is provided on the inner wall of the vertical guide groove, and the limiting protrusion is located below the lifting rod.

[0008] Preferably, the bottom end of the lifting rod is provided with a vertical sliding groove, the piston rod of the driving cylinder is provided with a connecting part, the connecting part is located in the vertical sliding groove, and a vertical spring is connected between the connecting part and the top wall of the vertical sliding groove. Two horizontal sliding grooves are symmetrically provided on the inner wall of the vertical guide groove. The horizontal sliding grooves are located below the limiting protrusion ring, and a slider is provided in the horizontal sliding groove. One end of the slider is connected to the side wall of the horizontal sliding groove with a horizontal spring, and the other end of the slider extends into the vertical guide groove and is provided with a driven inclined surface. The piston rod of the driving cylinder is externally fixedly fitted with an unlocking sleeve. The top of the unlocking sleeve is provided with a driving inclined surface that contacts and cooperates with the driven inclined surface. The top of the slider is provided with a connecting rod. The inside of the guide seat is provided with a relief cavity for accommodating the connecting rod. The side wall of the relief cavity is provided with a horizontal hole communicating with the vertical guide groove. The side of the connecting rod is provided with a locking pin that passes through the horizontal hole. The side of the lifting rod is provided with a locking hole for the locking pin to be inserted.

[0009] Preferably, the plurality of connecting branches are arranged at equal intervals along the axial direction of the test tube.

[0010] Preferably, the top end face of the connecting branch pipe is provided with an annular sealing groove, and the sealing ring is disposed in the annular sealing groove.

[0011] Preferably, the end of the test tube located outside the test instrument has a connector.

[0012] Preferably, the front side of the testing instrument is provided with a control panel, and the drive cylinder is electrically connected to the control panel.

[0013] The advantages and beneficial effects of this invention are as follows: It provides an automated pressure gauge testing system that, by setting multiple connecting branch pipes, allows for the simultaneous installation of multiple pressure gauges to be tested, enabling batch synchronous testing and significantly improving testing efficiency. Furthermore, by incorporating a clamping device, an arc-shaped pressure plate automatically presses down on the top of the pressure gauge under test, ensuring a tight seal between the pressure gauge and the sealing ring at the top of the connecting branch pipe. This effectively prevents gas leakage during the testing process, guarantees the accuracy and stability of the test pressure, and improves the reliability of the test results. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of the present invention.

[0015] Figure 2 This is a side view schematic diagram of the present invention.

[0016] Figure 3 yes Figure 2 A cross-sectional view.

[0017] Figure 4 yes Figure 3 A magnified view of point A.

[0018] Figure 5 yes Figure 3 Enlarged view of point B.

[0019] Reference numerals: 1. Testing instrument; 2. Test tube; 3. Reference pressure gauge; 4. Connecting branch pipe; 5. Sealing ring; 6. Guide seat; 7. Lifting rod; 8. Drive cylinder; 9. Vertical guide groove; 10. Bracket; 11. Arc-shaped pressure plate; 12. Limiting protrusion ring; 13. Vertical slide groove; 14. Connecting part; 15. Vertical spring; 16. Horizontal slide groove; 17. Slider; 18. Horizontal spring; 19. Driven inclined plane; 20. Unlocking sleeve; 21. Connecting rod; 22. Clearance cavity; 23. Horizontal hole; 24. Locking pin; 25. Lock hole; 26. Annular sealing groove; 27. Connector; 28. Control panel; 100. Pressure gauge to be tested. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] The specific technical solution of this invention is as follows: In one specific embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides an automated pressure gauge testing system, including a testing instrument 1 and a testing tube 2 disposed inside the testing instrument 1. One end of the testing tube 2 extends to the outside of the testing instrument 1 and is provided with a reference pressure gauge 3. The top of the testing tube 2 is provided with a plurality of connecting branch pipes 4, the top end of each connecting branch pipe 4 extending to the top of the testing instrument 1 for insertion of the pressure gauge 100 to be tested, and the top end face of the connecting branch pipe 4 is provided with a sealing ring 5 for forming a seal with the inserted pressure gauge 100 to be tested. The automated pressure gauge testing system also includes a clamping device, which includes a guide seat 6, a lifting rod 7, and a drive cylinder 8. The guide seat 6 is located at the top of the rear end of the testing instrument 1, and a vertical guide groove 9 is provided inside the guide seat 6. The lifting rod 7 is located in the vertical guide groove 9, and a plurality of arc-shaped pressure plates 11 are connected to the top of the lifting rod 7 through a bracket 10. The plurality of arc-shaped pressure plates 11 correspond one-to-one with a plurality of connecting branch pipes 4, and each arc-shaped pressure plate 11 is located directly above the corresponding connecting branch pipe 4. The drive cylinder 8 is located inside the testing instrument 1, and the piston rod of the drive cylinder 8 extends into the vertical guide groove 9 and is connected to the lifting rod 7.

[0022] The working principle of the automated pressure gauge testing system of the present invention, based on the above scheme, is as follows: During testing, the air inlets of multiple pressure gauges 100 to be tested are inserted into the connecting branch pipes 4, so that the interface end face of the pressure gauge 100 is pressed against the sealing ring 5. The lifting rod 7 is driven downwards a set distance by the driving cylinder 8, causing the lifting rod 7 to move multiple arc-shaped pressure plates 11 downwards together via the bracket 10 until each arc-shaped pressure plate 11 tightly presses against the top casing of the pressure gauge 100, thus pressing the entire pressure gauge 100 downwards to ensure a reliable seal between its interface and the sealing ring 5. Compressed gas is input into the test pipe 2 through an external air source, and the compressed gas enters the inner cavity of all pressure gauges 100 through the connecting branch pipes 4. The indicated value of each pressure gauge 100 is observed or recorded and compared with the indicated value of the control pressure gauge 3 to determine whether the error is within the allowable range, thus completing the test.

[0023] After the test, turn off the air supply. Drive the lifting rod 7 upward and reset it by driving the cylinder 8. This causes the lifting rod 7 to move upward along with multiple arc-shaped pressure plates 11 via the bracket 10, completely releasing the pressure gauge. The pressure gauge can then be removed manually or by a robotic arm.

[0024] In another specific embodiment, such as Figure 3 and Figure 5 As shown, a limiting protrusion ring 12 is provided on the inner wall of the vertical guide groove 9, and the limiting protrusion ring 12 is located below the lifting rod 7.

[0025] The above solution is adopted: a limiting protrusion 12 is set to limit the downward position of the lifting rod 7.

[0026] In another specific embodiment, such as Figure 3 and Figure 5 As shown, the bottom end of the lifting rod 7 is provided with a vertical slide groove 13. The piston rod of the driving cylinder 8 is provided with a connecting part 14, which is located in the vertical slide groove 13. A vertical spring 15 is connected between the connecting part 14 and the top wall of the vertical slide groove 13. Two horizontal slide grooves 16 are symmetrically provided on the inner wall of the vertical guide groove 9. The horizontal slide grooves 16 are located below the limiting protrusion ring 12, and a slider 17 is provided in the horizontal slide groove 16. A horizontal spring 18 is connected between one end of the slider 17 and the side wall of the horizontal slide groove 16, and the other end of the slider 17 extends to... The vertical guide groove 9 is provided with a driven inclined surface 19. The piston rod of the driving cylinder 8 is externally fixedly fitted with an unlocking sleeve 20. The top of the unlocking sleeve 20 is provided with a driving inclined surface that contacts and cooperates with the driven inclined surface 19. The top of the slider 17 is provided with a connecting rod 21. The inside of the guide seat 6 is provided with a relief cavity 22 for accommodating the connecting rod 21. The side wall of the relief cavity 22 is provided with a horizontal hole 23 that communicates with the vertical guide groove 9. The side of the connecting rod 21 is provided with a locking pin 24 that passes through the horizontal hole 23. The side of the lifting rod 7 is provided with a locking hole 25 for the locking pin 24 to be inserted.

[0027] The above-mentioned scheme is adopted: After the test is completed, when the clamping device releases the measured pressure gauge, the piston rod of the drive cylinder 8 first moves upward for a short period of time. During this stroke, the lifting rod 7 will remain stationary because it is in a locked state. The connecting part 14 moves upward in the vertical slide groove 13 to compress the vertical spring 15. At the same time, through the contact cooperation between the driving inclined surface of the unlocking sleeve 20 and the driven inclined surface 19 of the slider 17, the slider 17 is squeezed into the horizontal slide groove 16 and the horizontal spring 18 is compressed. This causes the slider 17 to drive the locking pin 24 to be pulled out from the lock hole 25 through the connecting rod 21, thereby releasing the lock on the lifting rod 7. At this time, the lifting rod 7 will move upward rapidly under the elastic restoring force of the vertical spring 15, causing the lifting rod 7 to drive the arc-shaped pressure plate 11 to move upward rapidly and release the pressure gauge. Subsequently, the piston rod of the drive cylinder 8 drives the lifting rod 7 to continue moving upward through the vertical spring 15, causing the lifting rod 7 to drive the arc-shaped pressure plate 11 to move into place so that the pressure gauge can be removed later. Furthermore, during the aforementioned process, the locking pin 24 and the slider 17 will respectively abut against the side walls of the lifting rod 7 and the unlocking sleeve 20; When the clamping device clamps the pressure gauge 100 to be tested, the piston rod of the drive cylinder 8 drives the lifting rod 7 downward, causing the lifting rod 7 to move downward through the bracket 10 and drive the arc-shaped pressure plate 11 downward until the lifting rod 7 is blocked by the limiting protrusion ring 12. At this time, the arc-shaped pressure plate 11 has moved to the lower position and clamps the pressure gauge 100 to be tested. Furthermore, when the lifting rod 7 is blocked by the limiting protrusion ring 12, the locking hole 25 of the lifting rod 7 will align with the locking pin 24. At this time, the slider 17 will be under the elastic restoring force of the horizontal spring 18. The slider 17 slides down and extends out of the horizontal slide groove 16. The slider 17 drives the locking pin 24 to move through the connecting rod 21 and insert it into the locking hole 25 of the lifting rod 7, thereby locking the lifting rod 7 in the current position. This prevents the lifting rod 7 and the arc-shaped pressure plate 11 from moving upward, ensuring that the arc-shaped pressure plate 11 continuously and stably presses the pressure gauge 100 under test, preventing the pressure gauge 100 under test from moving upward under the action of air pressure during the pressurization stage of the test system, and thus avoiding affecting the sealing effect between the pressure gauge 100 under test and the connecting branch pipe 4.

[0028] In another specific embodiment, such as Figure 1 As shown, the multiple connecting branch pipes 4 are arranged at equal intervals along the axial direction of the test pipe 2.

[0029] In another specific embodiment, such as Figure 3 and Figure 4 As shown, the top end face of the connecting branch pipe 4 is provided with an annular sealing groove 26, and the sealing ring 5 is disposed in the annular sealing groove 26.

[0030] The above solution is adopted: an annular sealing groove 26 is set for positioning and installing the sealing ring 5.

[0031] In another specific embodiment, such as Figure 1As shown, the test tube 2 has a connector 27 at one end located outside the test instrument 1.

[0032] The above solution is adopted: connector 27 is used to connect to an external gas source.

[0033] In another specific embodiment, such as Figure 1 As shown, the front side of the testing instrument 1 is provided with a control panel 28, and the drive cylinder 8 is electrically connected to the control panel 28.

[0034] The above solution is adopted: control panel 28 is used to control the operating status of drive cylinder 8.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pressure gauge automated testing system comprising a testing instrument (1) and a test tube (2) provided inside the testing instrument (1), one end of the test tube (2) extending to the outside of the testing instrument (1) and provided with a reference pressure gauge (3), characterized in that, The top of the test pipe (2) is provided with a plurality of connecting branch pipes (4), the top end of each connecting branch pipe (4) extends above the test instrument (1) for inserting the pressure gauge (100) to be tested, and the top end face of the connecting branch pipe (4) is provided with a sealing ring (5) for forming a seal with the inserted pressure gauge (100) to be tested. The pressure gauge automatic test system further comprises a pressing device, the pressing device comprises a guide seat (6), a lifting rod (7) and a driving cylinder (8), the guide seat (6) is arranged at the top of the rear end of the test instrument (1), and the inside of the guide seat (6) is provided with a vertical guide groove (9), the lifting rod (7) is arranged in the vertical guide groove (9), and the top end of the lifting rod (7) is connected with a plurality of arc-shaped pressing plates (11) through a support (10), the plurality of arc-shaped pressing plates (11) correspond to the plurality of connecting branch pipes (4) one by one, each arc-shaped pressing plate (11) is located directly above the corresponding connecting branch pipe (4), and the driving cylinder (8) is arranged in the test instrument (1), and the piston rod of the driving cylinder (8) extends into the vertical guide groove (9) and is connected with the lifting rod (7).

2. The pressure gauge automated testing system of claim 1, wherein, A limiting convex ring (12) is arranged on the inner wall of the vertical guide groove (9), and the limiting convex ring (12) is located below the lifting rod (7).

3. The pressure gauge automated testing system of claim 2, wherein, The bottom end of the lifting rod (7) is internally provided with a vertical sliding groove (13), the piston rod of the driving cylinder (8) is provided with a connecting portion (14), the connecting portion (14) is arranged in the vertical sliding groove (13), and a vertical spring (15) is connected between the connecting portion (14) and the top wall of the vertical sliding groove (13), two horizontal sliding grooves (16) are symmetrically arranged on the inner wall of the vertical guide groove (9), the horizontal sliding grooves (16) are located below the limiting convex ring (12), a sliding block (17) is arranged in the horizontal sliding groove (16), a horizontal spring (18) is connected between one end of the sliding block (17) and the side wall of the horizontal sliding groove (16), the other end of the sliding block (17) extends into the vertical guide groove (9) and is provided with a driven inclined surface (19), the piston rod of the driving cylinder (8) is externally fixedly sleeved with an unlocking sleeve (20), the top end of the unlocking sleeve (20) is provided with a driving inclined surface in contact with the driven inclined surface (19), the top of the sliding block (17) is provided with a connecting rod (21), the inside of the guide seat (6) is provided with an avoiding cavity (22) for accommodating the connecting rod (21), the side wall of the avoiding cavity (22) is provided with a horizontal hole (23) in communication with the vertical guide groove (9), the side of the connecting rod (21) is provided with a lock pin (24) penetrating into the horizontal hole (23), and the side of the lifting rod (7) is provided with a lock hole (25) for inserting the lock pin (24).

4. The pressure gauge automated testing system of claim 3, wherein, The plurality of connecting branch pipes (4) are arranged at equal intervals along the axial direction of the test pipe (2).

5. The pressure gauge automated testing system of claim 1, wherein, The top end face of the connecting branch pipe (4) is provided with an annular sealing groove (26), and the sealing ring (5) is arranged in the annular sealing groove (26).

6. The pressure gauge automated testing system of claim 1, wherein, One end of the test pipe (2) located outside the test instrument (1) is provided with a connector (27).

7. The pressure gauge automated testing system of claim 1, wherein, The front side of the testing instrument (1) is provided with a control panel (28), and the driving cylinder (8) is electrically connected with the control panel (28).

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