A pressure gauge maintenance and calibration device

Abstract

The utility model belongs to the technical field of pressure gauge maintenance, and in particular, relates to a pressure gauge maintenance and calibration device, including a test box, a standard pressure gauge and a pressure gauge to be tested, a booster pump is installed on the left side of the test box, a shell is fixedly provided on the upper end of the test box, a pressure delivery assembly is provided in an annular shape on the circumference of the shell, a through groove is provided in an annular shape on the outer wall of the shell, a plurality of groups of pressure delivery assemblies are provided above each other, a driving assembly is installed inside the shell, an electric push rod is fixed on the top of the shell, a rack is fixedly connected to the telescopic end of the electric push rod, and a standard pressure gauge is fixedly installed on the upper left side of the test box. The utility model is provided with a plurality of groups of pressure delivery assemblies and a plurality of groups of clamping assemblies arranged in a one-to-one correspondence therewith, which is convenient for simultaneous installation and detection and calibration of a plurality of pressure gauges to be tested, and is convenient for batch processing of the pressure gauges to be tested, with faster detection and calibration speed and higher efficiency, and can also effectively reduce the work intensity.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure gauge maintenance, in particular to a pressure gauge maintenance and calibration device. Background Art

[0002] Pressure gauges are instruments that use elastic elements as sensitive elements to measure and indicate pressures higher than ambient pressure. They are widely used in almost all industrial processes and scientific research fields. The calibration of pressure gauges is crucial to ensure the safety and quality of personnel working around the pressure gauges. As time goes by, the accuracy of the pressure gauges will deviate. In order to eliminate safety hazards, the gauges must be calibrated regularly using calibration devices.

[0003] In the Chinese utility model patent with publication number CN218765788U, a pressure gauge calibration device is provided. Through the flow-limiting cylinder arranged on the protective shell, the flow-limiting plate can be driven to move horizontally, so as to limit the flow of the second mounting member, so that the gas in the connecting pipe cannot be discharged to the pressure gauge to be calibrated. The calibrated pressure gauge to be calibrated is removed, and another pressure gauge to be calibrated is installed, so that continuous calibration is performed without exhausting the gas, saving time and having strong practicality.

[0004] After searching, it is found that the pressure gauge calibration device proposed in the above-mentioned comparative document still has some defects and deficiencies in the actual calibration process: the above-mentioned device does not have the function of simultaneously testing and calibrating multiple pressure gauges, and the pressure gauges need to be tested separately, which takes a long time, and the efficiency of testing and calibration is not high, and it will also increase the workload of the testing and calibration personnel. Therefore, it is urgent to improve the existing pressure gauge maintenance and calibration device and provide a pressure gauge maintenance and calibration device. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure gauge maintenance and calibration device with reasonable design, simple structure, capable of simultaneously detecting and calibrating multiple pressure gauges, with faster calibration speed and higher efficiency, so as to solve the problems existing in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pressure gauge inspection and calibration device comprises a test box, a standard pressure gauge and a pressure gauge to be tested, a booster pump is installed on the left side of the test box, a shell is fixedly provided on the upper end of the test box, a pressure delivery assembly is provided in an annular shape on the circumference of the shell, a through groove is provided in an annular shape on the outer wall of the shell, a plurality of groups of pressure delivery assemblies are provided above each of the above-mentioned clamping assemblies, a drive assembly is installed inside the shell, an electric push rod is fixed on the top end of the shell, a rack is fixedly connected to the telescopic end of the electric push rod, a standard pressure gauge is fixedly installed on the upper left side of the test box, a pressure gauge to be tested is provided on the inner side of the clamping assembly, and a fixing ring is provided on the outer fixed sleeve at the bottom end of the pressure gauge to be tested.

[0008] As a preferred implementation, a pressure relief pipe is embedded in the right front outer wall of the test box, and a solenoid valve is installed in the middle of the pressure relief pipe.

[0009] As a preferred embodiment, the pressure delivery assembly includes an inner tube, a first sealing ring, an outer tube and a second sealing ring. The bottom end of the inner tube is embedded and connected to the test box. The outer side of the inner tube is bonded with a first sealing ring. The outer side of the inner tube is provided with an outer tube. The bottom end of the outer tube is fixed to the upper end surface of the test box, and the top end of the outer tube is bonded with a second sealing ring.

[0010] As a preferred implementation, the first sealing ring and the second sealing ring are both made of rubber material, and the thickness of the first sealing ring is arranged to increase from top to bottom.

[0011] As a preferred embodiment, the clamping assembly includes a vertical rod, a movable column and a concave pressure plate. The vertical rod is fixedly installed on the inner side of the through groove, and the outer sliding sleeve of the vertical rod is provided with a movable column. The end of the movable column located outside the shell is fixedly connected to the concave pressure plate.

[0012] As a preferred embodiment, the driving assembly includes a vertical shaft, a gear, a cylinder and a spiral bevel groove. The vertical shaft bearing is installed at the center of the outer shell. The top of the vertical shaft is fixedly connected to a gear, and the gear is meshed with the rack. A cylinder is fixedly sleeved on the outer side of the middle part of the vertical shaft. The cylinder is movably located in the outer shell, and the outer wall of the cylinder is annularly provided with multiple spiral bevel grooves that correspond one to one with the clamping assemblies.

[0013] As a preferred embodiment, one end of the movable column located in the housing is guided and slidably located in the spiral chute, and multiple groups of the clamping assemblies are linked to each other through a cylinder.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the solution of the utility model:

[0016] The device is provided with multiple groups of pressure delivery components and multiple groups of clamping components arranged in one-to-one correspondence therewith, which is convenient for simultaneous installation and detection and calibration of multiple pressure gauges to be tested, and is convenient for batch processing of pressure gauges to be tested. Compared with the comparative documents, the detection and calibration speed of the device is faster and more efficient, and the work intensity can be effectively reduced;

[0017] Insert the vertical tube of the pressure gauge to be tested into the inner side of the concave pressure plate, and make the fixing ring be located below the concave pressure plate, then insert the bottom end of the vertical tube of the pressure gauge to be tested into the outside of the inner tube, and then control the rack to move left by the electric push rod, which can push the gear, the vertical shaft and the cylinder to rotate slightly counterclockwise. At this time, the movable column can be squeezed through the spiral inclined groove to drive the concave pressure plate to move down along the vertical rod synchronously, so that the pressure gauge to be tested can be pressed tightly onto the pressure delivery assembly, and the sealing can be ensured by the first sealing ring and the second sealing ring. The pressure gauge to be tested is quick and convenient to install and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions, and the following description is made with respect to the drawings:

[0019] Figure 1 This is a three-dimensional top view of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall front view structure of the drive assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the utility model in working state;

[0024] Figure 6 It is a front view cross-sectional structural schematic diagram of the connection state between the pressure gauge to be tested and the inner tube of the utility model.

[0025] In the figure:

[0026] 1. Test box; 2. Booster pump; 3. Pressure relief pipe; 4. Solenoid valve; 5. Pressure delivery assembly; 51. Inner tube; 52. First sealing ring; 53. Outer tube; 54. Second sealing ring; 6. Outer shell; 7. Through groove; 8. Clamping assembly; 81. Vertical rod; 82. Movable column; 83. Concave pressure plate; 9. Driving assembly; 91. Vertical shaft; 92. Gear; 93. Cylinder; 94. Spiral inclined groove; 10. Electric push rod; 11. Rack; 12. Standard pressure gauge; 13. Pressure gauge to be tested; 14. Fixed ring. DETAILED DESCRIPTION

[0027] The embodiments described below are only some of the embodiments of the present invention and do not represent all the embodiments consistent with the present invention. Now, in conjunction with the accompanying drawings, the exemplary embodiments are described as follows:

[0028] like Figure 1-6 As shown, the utility model pressure gauge maintenance and calibration device comprises a test box 1, a standard pressure gauge 12 and a pressure gauge to be tested 13, a booster pump 2 is installed on the left side of the test box 1, a shell 6 is fixedly provided on the upper end of the test box 1, a pressure delivery assembly 5 is provided in an annular shape on the circumference of the shell 6, a through groove 7 is provided in an annular shape on the outer wall of the shell 6, a clamping assembly 8 is provided above the multiple groups of pressure delivery assemblies 5, a driving assembly 9 is installed inside the shell 6, an electric push rod 10 is fixed on the top of the shell 6, a rack 11 is fixedly connected to the telescopic end of the electric push rod 10, a standard pressure gauge 12 is fixedly installed on the upper left side of the test box 1, a pressure gauge to be tested 13 is provided on the inner side of the clamping assembly 8, and a fixing ring 14 is provided on the outer fixed sleeve of the bottom end of the pressure gauge to be tested 13.

[0029] On the basis of the above structure, a pressure relief pipe 3 is embedded and connected to the right front outer wall of the test box 1 , and a solenoid valve 4 is installed in the middle of the pressure relief pipe 3 .

[0030] In this embodiment, the arrangement of the pressure relief pipe 3 and the electromagnetic valve 4 facilitates pressure relief after the detection and calibration, and facilitates the disassembly, assembly and replacement of the pressure gauge 13 to be tested.

[0031] On the basis of the above structure, the pressure delivery assembly 5 includes an inner tube 51, a first sealing ring 52, an outer tube 53 and a second sealing ring 54. The bottom end of the inner tube 51 is embedded and connected with the test box 1. The outer side of the inner tube 51 is bonded with a first sealing ring 52. The outer side of the inner tube 51 is provided with an outer tube 53. The bottom end of the outer tube 53 is fixed to the upper end surface of the test box 1. The top end of the outer tube 53 is bonded with a second sealing ring 54.

[0032] On the basis of the above structure, the first sealing ring 52 and the second sealing ring 54 are both made of rubber material, and the thickness of the first sealing ring 52 is set to increase from top to bottom.

[0033] In this embodiment, the bottom end of the pressure gauge 13 to be tested is plugged into the inner tube 51 to facilitate pressure detection and calibration of the pressure gauge. The first sealing ring 52 and the second sealing ring 54 are used to improve the sealing performance of the pressure gauge 13 to be tested.

[0034] Based on the above structure, the clamping assembly 8 includes a vertical rod 81, a movable column 82 and a concave pressure plate 83. The vertical rod 81 is fixedly installed on the inner side of the through groove 7. The outer sliding sleeve of the vertical rod 81 is provided with a movable column 82. The end of the movable column 82 located outside the outer shell 6 is fixedly connected to the concave pressure plate 83.

[0035] In this embodiment, the clamping assembly 8 is provided to facilitate pressing the pressure gauge 13 to be tested downward, thereby improving the installation stability of the pressure gauge 13 to be tested, and can also apply pressure to the first sealing ring 52 and the second sealing ring 54 to further improve the sealing effect of the connection.

[0036] On the basis of the above structure, the driving assembly 9 includes a vertical shaft 91, a gear 92, a cylinder 93 and a spiral bevel groove 94. The bearing of the vertical shaft 91 is installed at the center of the outer shell 6. The top of the vertical shaft 91 is fixedly connected with a gear 92, and the gear 92 is meshed with the rack 11. A cylinder 93 is fixedly sleeved on the outer side of the middle part of the vertical shaft 91. The cylinder 93 is movably located in the outer shell 6, and the outer wall of the cylinder 93 is annularly provided with a plurality of spiral bevel grooves 94 that correspond one to one with the clamping assembly 8.

[0037] On the basis of the above structure, one end of the movable column 82 located in the housing 6 is guided and slidably located in the spiral inclined groove 94 , and the multiple groups of clamping components 8 are linked together through the cylinder 93 .

[0038] In this embodiment, by controlling the rack 11 to move leftward through the electric push rod 10, the gear 92, the vertical shaft 91 and the cylinder 93 can be pushed to rotate counterclockwise. At this time, the movable column 82 can be squeezed through the spiral bevel 94, so that the movable column 82 can be controlled to drive the concave pressure plate 83 to move downward along the vertical rod 81 synchronously and stably.

[0039] The working principle of the utility model is as follows:

[0040] When in use, first insert the vertical tube of the pressure gauge 13 to be tested into the inner side of the concave pressure plate 83, and make the fixing ring 14 be located below the concave pressure plate 83, and then insert the bottom end of the vertical tube of the pressure gauge 13 to be tested into the outer side of the inner tube 51. Figure 6As shown, the electric push rod 10 is then started to retract, and the rack 11 is controlled to move leftward, which can push the gear 92, the vertical shaft 91 and the cylinder 93 to rotate slightly counterclockwise synchronously. At this time, the spiral bevel 94 provided on the outer wall of the cylinder 93 can be used to squeeze the movable column 82, so that it drives the concave pressing plate 83 to move downward along the vertical rod 81 synchronously and steadily, and the concave pressing plate 83 can be used to press the fixing ring 14 downward, and the pressure gauge 13 to be tested can be pressed tightly on the pressure delivery assembly 5, completing the convenient installation of the pressure gauge 13 to be tested;

[0041] The first sealing ring 52 facilitates sealing between the vertical pipe of the pressure gauge 13 to be tested and the inner pipe 51, and the second sealing ring 54 facilitates sealing between the fixing ring 14 and the outer pipe 53. The double sealing can ensure the sealing effect of the connection, and the multiple groups of clamping components 8 can be linked to each other, which is convenient for rapid installation and clamping positioning of multiple pressure gauges 13 to be tested, and the operation is convenient. Then, the booster pump 2 starts to pressurize the inside of the test box 1, and the pointer positions of the pressure gauge 13 to be tested and the standard pressure gauge 12 are observed, so that the pressure gauge 13 to be tested can be quickly tested and calibrated;

[0042] Compared with the comparative documents, the present device is provided with a plurality of sets of pressure delivery components 5 and clamping components 8 corresponding to each other, which is convenient for the simultaneous installation and detection and calibration of multiple pressure gauges 13 to be tested, and is convenient for batch processing of the pressure gauges 13 to be tested. The detection and calibration speed is faster and more efficient, and the work intensity can be effectively reduced, making the device more practical.

[0043] The above are only preferred specific embodiments of the utility model and are not intended to limit the protection scope of the utility model; any equivalent changes, modifications, substitutions and variations made by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the protection scope determined by the claims.

Claims

1. A pressure gauge inspection and calibration device, comprising a test box (1), a standard pressure gauge (12) and a pressure gauge to be tested (13), characterized in that: A booster pump (2) is installed on the left side of the test box (1), a shell (6) is fixedly installed on the upper end of the test box (1), a pressure delivery assembly (5) is arranged in an annular shape on the circumference of the shell (6), a through groove (7) is opened in an annular shape on the outer wall of the shell (6), a clamping assembly (8) is arranged above the plurality of groups of the pressure delivery assemblies (5), a driving assembly (9) is installed inside the shell (6), an electric push rod (10) is fixed on the top of the shell (6), a rack (11) is fixedly connected to the telescopic end of the electric push rod (10), a standard pressure gauge (12) is fixedly installed on the upper left side of the test box (1), a pressure gauge (13) to be tested is arranged on the inner side of the clamping assembly (8), and a fixing ring (14) is fixedly sleeved on the outer side of the bottom end of the pressure gauge (13) to be tested.

2. A pressure gauge maintenance and calibration device according to claim 1, characterized in that: A pressure relief pipe (3) is inlaid and connected to the right front outer wall of the test box (1), and a solenoid valve (4) is installed in the middle of the pressure relief pipe (3).

3. A pressure gauge maintenance and calibration device according to claim 1, characterized in that: The pressure-feeding assembly (5) comprises an inner tube (51), a first sealing ring (52), an outer tube (53) and a second sealing ring (54); the bottom end of the inner tube (51) is embedded and connected to the test box (1); the first sealing ring (52) is provided on the outer side of the inner tube (51); the outer side of the inner tube (51) is provided with an outer tube (53); the bottom end of the outer tube (53) is fixed to the upper end surface of the test box (1); and the top end of the outer tube (53) is bonded with the second sealing ring (54).

4. A pressure gauge maintenance and calibration device according to claim 3, characterized in that: The first sealing ring (52) and the second sealing ring (54) are both made of rubber material, and the thickness of the first sealing ring (52) is arranged to increase from top to bottom.

5. A pressure gauge maintenance and calibration device according to claim 1, characterized in that: The clamping assembly (8) comprises a vertical rod (81), a movable column (82) and a concave pressing plate (83); the vertical rod (81) is fixedly mounted on the inner side of the through groove (7); the movable column (82) is slidably sleeved on the outer side of the vertical rod (81); and one end of the movable column (82) located outside the housing (6) is fixedly connected to the concave pressing plate (83).

6. A pressure gauge maintenance and calibration device according to claim 5, characterized in that: The driving assembly (9) comprises a vertical shaft (91), a gear (92), a cylinder (93) and a spiral bevel groove (94); the bearing of the vertical shaft (91) is installed at the center of the outer shell (6); the top end of the vertical shaft (91) is fixedly connected with a gear (92); the gear (92) is meshed with a rack (11); a cylinder (93) is fixedly sleeved on the outer side of the middle part of the vertical shaft (91); the cylinder (93) is movably located in the outer shell (6); and the outer wall of the cylinder (93) is annularly provided with a plurality of spiral bevel grooves (94) corresponding to the clamping assemblies (8) in a one-to-one manner.

7. A pressure gauge maintenance and calibration device according to claim 6, characterized in that: One end of the movable column (82) located in the housing (6) is guided and slidably located in the spiral inclined groove (94), and multiple groups of the clamping components (8) are linked to each other through the cylinder (93).

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