Pressure gauge calibration device

Abstract

The utility model discloses a pressure gauge calibration device, which relates to the technical field of pressure gauges and comprises a pressure gauge, one end of the pressure gauge is fixedly connected with a communicating pipe, and the pressure gauge is installed on a butt joint assembly. The butt joint assembly comprises a lower connector, an upper connector is slidably connected into the lower connector, the top of the upper connector is connected with the other end of the butt joint assembly, a limiting ring is fixedly connected to the middle of the upper connector, and two symmetrically-arranged limiting blocks are fixedly connected to the two sides of the lower connector. The middle of the limiting block is rotationally connected with a transmission shaft, and the middle of the transmission shaft is fixedly connected with a pressing block. The pressing block driven by the worm gear and the worm is adopted, single-action pressing and releasing of the limiting ring are achieved through the hand wheel, loosening is prevented through the cooperation of the self-locking characteristic, the installation efficiency is improved, low installation efficiency and poor sealing performance can be effectively avoided, meanwhile, installation and disassembly are convenient, and the efficiency of connecting the pressure gauge is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pressure gauge technology, specifically a pressure gauge calibration device. Background Technology

[0002] A pressure gauge is an instrument used to measure the pressure of fluids (liquids or gases). It utilizes an elastic sensitive element (such as a Bourdon tube, diaphragm, or bellows) to produce elastic deformation under pressure. The magnitude of the deformation is linearly related to the applied pressure. The pressure is amplified by a transmission mechanism and indicated by a pointer on a scale. Pressure gauges are widely used in industrial production, energy and power, scientific research experiments, and daily life where pressure monitoring and control are required.

[0003] Traditional calibration methods often rely on manual threaded connection for fastening, which suffers from low installation efficiency, poor sealing, and easy stripping of threads with repeated disassembly. Traditional threaded connections require manual rotation multiple turns to achieve a tight fit (such as connecting a pressure gauge to a pipeline), and disassembly requires reversing the operation. For example, if the thread pitch is 1mm, tightening 10 turns only advances the thread by 10mm, which is time-consuming and laborious. In multi-gauge comparison calibration, frequent disassembly and assembly significantly increases time costs. Each disassembly and installation of threaded connections causes some degree of wear on the thread surface. With the increase in the number of disassembly and assembly, the shape and size of the threads change, making the fit between the threads less tight. For example, during frequent calibration, threaded connectors may wear due to repeated mechanical action, leading to stripping and affecting calibration efficiency. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a pressure gauge calibration device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pressure gauge calibration device, comprising a pressure gauge, one end of which is fixedly connected to a connecting pipe, and the pressure gauge is mounted on a docking assembly;

[0006] The docking assembly includes a lower connector, an upper connector that is slidably connected inside the lower connector, the top of the upper connector being connected to the other end of the docking assembly, a limiting ring being fixedly connected to the middle of the upper connector, two symmetrically arranged limiting blocks being fixedly connected to both sides of the lower connector, a drive shaft being rotatably connected to the middle of the limiting blocks, and a clamping block being fixedly connected to the middle of the drive shaft.

[0007] The two sets of clamping blocks rotate to press the upper edge of the limiting ring, thereby achieving the assembly and docking of the pressure gauge.

[0008] Preferably, the lower surface of the limiting ring is placed on one end of the lower connector and fits perfectly;

[0009] The clamping block is located in the middle of two symmetrically arranged limiting blocks.

[0010] Preferably, the docking assembly further includes a connecting pipe that slides within the lower connector and is fixed to the lower surface of the limiting ring;

[0011] Two symmetrically arranged positioning plates are fixed to one side of one of the limiting blocks and are rotatably connected to a worm gear in the middle.

[0012] The worm gear is fixed to the middle of the drive shaft and meshes with the worm.

[0013] Preferably, it also includes a base plate, on which an adjustment component is provided to change the direction of the fluid inside the transmission pipe, and the adjustment component is connected to two sets of docking components.

[0014] Preferably, the adjustment assembly includes two symmetrically arranged limiting plates, which are fixed to the surface of the base plate;

[0015] The transmission tube is fixed to the middle of the limiting plate, and both ends are fixed to the other end of the lower connector.

[0016] Preferably, the adjustment component further includes a connecting pipe, which is fixed to the middle of one end of the transmission pipe and communicates with it;

[0017] The motor is fixedly connected to the surface of the base plate and a bevel gear is fixedly connected to the output end;

[0018] Bevel gear two meshes with bevel gear one and has a rotating shaft fixedly connected to its middle part;

[0019] The rotary stop ball rotates inside the transmission tube and is connected to the other end of the rotating shaft;

[0020] The air pressure port is located inside the swivel plug.

[0021] Preferably, the rotating shaft is movably installed in the middle of the transmission pipe, the swivel stop ball is disposed inside the transmission pipe, and one of the diameters of the air pressure hole is the same as the diameter of the inner end hole of the connecting pipe.

[0022] Preferably, a pressure stabilizing pump is fixedly connected to the base plate to increase the gas pressure, and the output end of the pressure stabilizing pump is connected to the other end of the connecting pipe.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] (1) The clamping block driven by worm gear in this utility model is used to achieve single-action clamping and release of the limit ring through the handwheel. With the self-locking feature, it prevents loosening and improves installation efficiency. It can effectively avoid low installation efficiency and poor sealing. At the same time, it is more convenient to install and disassemble, and improves the efficiency when connecting to the pressure gauge.

[0025] (2) In this utility model, by integrating the double docking component and the fluid switching structure of the rotary plug ball, the air pressure hole is precisely rotated by the motor-driven bevel gear set, so as to realize the synchronous comparison test of the two pressure gauges under constant pressure. At the same time, the design of the pressure stabilizing pump and the L-shaped guide groove ensures stable air pressure delivery and reduces the error rate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model. Figure 2 ;

[0028] Figure 3 This is a three-dimensional structural diagram of the adjustment component in this utility model;

[0029] Figure 4 This is a partial structural diagram of the adjustment component in this utility model;

[0030] Figure 5 This is a three-dimensional structural diagram of the docking components used in this application.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 This is a structural breakdown diagram of the docking components in this utility model;

[0033] In the diagram: 1. Base plate; 2. Pressure stabilizing pump; 3. Adjusting assembly; 30. Connecting pipe; 31. Transmission pipe; 32. Limiting plate; 33. Motor; 34. Bevel gear one; 35. Bevel gear two; 36. Rotating shaft; 37. Rotary stop ball; 38. Air pressure hole; 4. Docking assembly; 40. Upper connector; 41. Limiting ring; 42. Docking pipe; 43. Lower connector; 44. Clamping block; 45. Positioning plate; 46. Worm gear; 47. Worm wheel; 48. Drive shaft; 49. Limiting block; 5. Connecting pipe; 6. Pressure gauge. Detailed Implementation

[0034] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Example 1

[0036] Please see Figure 1 - Figure 7 This application provides a pressure gauge calibration device, including a pressure gauge 6, one end of which is fixedly connected to a connecting pipe 5, and the pressure gauge 6 is mounted on a docking assembly 4;

[0037] The docking assembly 4 includes a lower connector 43, an upper connector 40 is slidably connected inside the lower connector 43, the top of the upper connector 40 is connected to the other end of the docking assembly 4, a limit ring 41 is fixedly connected to the middle of the upper connector 40, and two symmetrically arranged limit blocks 49 are fixedly connected to both sides of the lower connector 43. A drive shaft 48 is rotatably connected to the middle of the limit block 49, and a clamping block 44 is fixedly connected to the middle of the drive shaft 48.

[0038] The two sets of clamping blocks 44 rotate to clamp the upper edge of the limiting ring 41, thereby achieving the assembly and docking of the pressure gauge 6.

[0039] It should be noted that a sealing ring is provided on the inner wall of the lower connector 43. The sealing ring is used to improve the sealing between the upper connector 40 and the lower connector 43 and prevent fluid leakage. A sealing groove is provided on the outer wall of the upper connector 40 to cooperate with the sealing ring. The sealing ring is embedded in the sealing groove to achieve a sealed connection between the upper connector 40 and the lower connector 43. A wear-resistant layer is provided on the lower surface of the limiting ring 41. The wear-resistant layer is used to reduce the wear between the limiting ring 41 and the lower connector 43 and improve the service life of the limiting ring 41. An elastic gasket is provided on the pressing surface of the pressing block 44. The elastic gasket is used to increase the pressing force between the pressing block 44 and the limiting ring 41, and at the same time plays a buffering role to prevent the pressing block 44 from damaging the limiting ring 41.

[0040] There are two pressure gauges 6: one for testing the sample and one for testing the pressure gauge 6 to be compared and calibrated.

[0041] In this embodiment, preferably, the lower surface of the limiting ring 41 is placed on one end of the lower connector 43 and fits perfectly;

[0042] The clamping block 44 is located in the middle of two symmetrically arranged limiting blocks 49.

[0043] In this embodiment, preferably, the docking component 4 further includes a docking tube 42, which slides within the lower connector 43 and is fixed to the lower surface of the limiting ring 41;

[0044] Two symmetrically arranged positioning plates 45 are fixed to one side of one of the limiting blocks 49 and are rotatably connected to a worm gear 46 in the middle.

[0045] The worm gear 47 is fixed to the middle of the drive shaft 48 and meshes with the worm 46.

[0046] It should be noted that the worm gear 46 is equipped with a handwheel for manual operation. The handwheel is installed at one end of the worm gear 46, which allows the operator to manually rotate the worm gear 46 to adjust the clamping block 44.

[0047] During implementation, the pressure gauge 6 connected to the upper connector 40 is placed inside the lower connector 43, the limiting ring 41 rests on the surface of the lower connector 43, the connecting pipe 42 is placed inside the lower connector 43, the handwheel is turned, the handwheel drives the worm 46 to rotate along the middle of the two positioning plates 45, the worm 46 drives the worm wheel 47 to rotate, the worm wheel 47 drives the drive shaft 48 to rotate along the middle of the limiting block 49, the drive shaft 48 drives the pressing block 44 to rotate, thereby pressing the upper edge of the limiting ring 41, and the self-locking property of the worm 46 and the worm wheel 47 prevents it from loosening;

[0048] When disassembly is required, turn the handwheel. The handwheel causes the worm 46 to rotate along the middle of the two positioning plates 45. The worm 46 causes the worm wheel 47 to rotate. The worm wheel 47 causes the drive shaft 48 to rotate along the middle of the limiting block 49. The drive shaft 48 causes the clamping block 44 to rotate, thereby loosening the upper edge of the limiting ring 41.

[0049] This design makes it easier to assemble and connect the pressure gauge 6 during calibration, avoiding the risk of pressure leakage and inaccurate calibration caused by traditional threaded connections that are prone to stripping. It also makes disassembly and reassembly more convenient.

[0050] Example 2

[0051] In this embodiment, preferably, it also includes a base plate 1, on which an adjustment component 3 is provided to change the direction of the fluid inside the transmission pipe 31. The adjustment component 3 is connected to two sets of docking components 4.

[0052] In this embodiment, preferably, the adjustment component 3 includes two symmetrically arranged limiting plates 32, which are fixed to the surface of the base plate 1;

[0053] The transmission tube 31 is fixed to the middle of the limiting plate 32 and both ends are fixed to the other end of the lower connector 43.

[0054] In this embodiment, preferably, the adjustment component 3 further includes a connecting pipe 30, which is fixed to the middle of one end of the transmission pipe 31 and is in communication with it.

[0055] Motor 33 is fixedly connected to the surface of base plate 1 and has bevel gear 34 fixedly connected to its output end;

[0056] Bevel gear 2 35 meshes with bevel gear 1 34 and has a rotating shaft 36 fixedly connected in the middle;

[0057] The swivel stop ball 37 rotates inside the transmission pipe 31 and is connected to the other end of the rotating shaft 36;

[0058] Air pressure hole 38 is located inside the swivel plug ball 37.

[0059] It should be noted that the rotary stop ball 37 is located in the middle of the transmission pipe 31 and divides the inside of the transmission pipe 31 into two fluid chambers.

[0060] The inner wall of the air pressure port 38 is provided with a guide groove for guiding the flow of fluid. The guide groove is L-shaped to facilitate the adjustment and guidance to the two fluid chambers.

[0061] In this embodiment, preferably, the rotating shaft 36 is movably installed in the middle of the transmission pipe 31, the swivel stop ball 37 is disposed inside the transmission pipe 31, and one of the holes of the air pressure hole 38 has the same diameter as the inner end hole diameter of the connecting pipe 30 to avoid air pressure reduction.

[0062] In this embodiment, preferably, a pressure stabilizing pump 2 is fixedly connected to the base plate 1 to increase the gas pressure, and the output end of the pressure stabilizing pump 2 is connected to the other end of the connecting pipe 30.

[0063] During implementation, a pressure stabilizing pump 2 is set up. The pressure stabilizing pump 2 delivers air pressure to the inside of the transmission pipe 31 through the connecting pipe 30. The air pressure enters one of the fluid chambers in the transmission pipe 31 through the air pressure hole 38, thereby pressurizing the pressure gauge 6 of the sample to obtain pressure data.

[0064] Motor 33 is set up. The output end of motor 33 drives bevel gear 1 34 to rotate. Bevel gear 1 34 drives bevel gear 2 35 to rotate. Bevel gear 2 35 drives shaft 36 to rotate along the middle of transmission pipe 31. Shaft 36 drives swivel ball 37 to rotate. Swivel ball 37 drives air pressure port 38 to rotate 180°, so that air pressure port 38 connects to the inside of another fluid chamber, so that air pressure can enter the pressure gauge 6 to be tested through the other fluid chamber. Check whether the pressure data is accurate.

[0065] When pressure gauge 6 is being tested, if the pressure pump 2 delivers the same air pressure, the air pressure error entering the two fluid chambers through the air pressure port 38 will be smaller, thus improving the accuracy of the calibration.

[0066] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A pressure gauge calibration device, characterized in that, Includes a pressure gauge (6), one end of which is fixedly connected to a connecting pipe (5), and the pressure gauge (6) is mounted on the docking assembly (4); The docking assembly (4) includes a lower connector (43), an upper connector (40) is slidably connected inside the lower connector (43), the top of the upper connector (40) is connected to the other end of the docking assembly (4), a limiting ring (41) is fixedly connected to the middle of the upper connector (40), two symmetrically arranged limiting blocks (49) are fixedly connected to both sides of the lower connector (43), a drive shaft (48) is rotatably connected to the middle of the limiting block (49), and a clamping block (44) is fixedly connected to the middle of the drive shaft (48). The two sets of clamping blocks (44) rotate to clamp the upper edge of the limiting ring (41), thereby achieving the assembly and docking of the pressure gauge (6).

2. The pressure gauge calibration device according to claim 1, characterized in that, The lower surface of the limiting ring (41) is placed on one end of the lower connector (43) and fits perfectly; The clamping block (44) is located in the middle of two symmetrically arranged limiting blocks (49).

3. The pressure gauge calibration device according to claim 1, characterized in that, The docking assembly (4) further includes a docking tube (42), which slides within the lower connector (43) and is fixed to the lower surface of the limiting ring (41); Two symmetrically arranged positioning plates (45) are fixed to one side of one of the limiting blocks (49) and a worm gear (46) is rotatably connected in the middle. The worm gear (47) is fixed to the middle of the drive shaft (48) and meshes with the worm (46).

4. The pressure gauge calibration device according to claim 1, characterized in that, It also includes a base plate (1), on which an adjustment component (3) is provided to change the direction of the fluid inside the transmission pipe (31). The adjustment component (3) is connected to two sets of docking components (4).

5. A pressure gauge calibration device according to claim 4, characterized in that, The adjustment component (3) includes two symmetrically arranged limiting plates (32) which are fixed to the surface of the base plate (1); The transmission tube (31) is fixed to the middle of the limiting plate (32) and both ends are fixed to the other end of the lower connector (43).

6. The pressure gauge calibration device according to claim 4, characterized in that, The adjustment component (3) also includes a connecting pipe (30), which is fixed to the middle of one end of the transmission pipe (31) and is connected to it; The motor (33) is fixed to the surface of the base plate (1) and the output end is fixed to a bevel gear (34); The second bevel gear (35) meshes with the first bevel gear (34) and has a rotating shaft (36) fixed in the middle; The swivel ball (37) rotates inside the transmission pipe (31) and is connected to the other end of the rotating shaft (36); The air pressure hole (38) is located inside the swivel ball (37).

7. A pressure gauge calibration device according to claim 6, characterized in that, The rotating shaft (36) is movably installed in the middle of the transmission pipe (31), the swivel ball (37) is set inside the transmission pipe (31), and one of the holes of the air pressure hole (38) has the same diameter as the inner end hole of the connecting pipe (30).

8. A pressure gauge calibration device according to claim 4, characterized in that, A pressure stabilizing pump (2) is fixedly connected to the base plate (1) to increase the gas pressure. The output end of the pressure stabilizing pump (2) is connected to the other end of the connecting pipe (30).

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