A pressure gauge checking device

Abstract

This utility model relates to the field of pressure gauge calibration technology and discloses a pressure gauge calibration device, including a calibration platform and four support rods fixedly installed at the lower end of the calibration platform. A digital pressure gauge and the pressure gauge body are mounted on the calibration device. With the cooperation of a shut-off valve, a telescopic cylinder, a piston rod, and a piston tube, the gas inside the piston tube is compressed to form air pressure, which is then forced into the pressure tube body. The pressure scale accurately describes the applied air pressure, and the digital pressure gauge displays the current pressure value. The pointer on the pressure gauge body rotates to the specified pressure value. Subsequently, pressure is applied again via the telescopic cylinder, increasing the air pressure according to the prescribed calibration value, thereby calibrating the pressure gauge body. The use of a telescopic cylinder and pressure scale allows for precise pressurization to the specified pressure value and continuous pressurization to the next specified pressure value, significantly improving the efficiency of the calibration process.

Description

Technical Field

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

[0002] A pressure gauge is an instrument that uses an elastic element as its sensing element to measure and indicate pressures higher than ambient pressure. It is extremely widely used, found in almost all industrial processes and scientific research fields. Especially in industrial process control and technical measurement, mechanical pressure gauges are increasingly widely used due to the high mechanical strength and ease of production of their elastic sensing elements.

[0003] Existing pressure gauge calibration devices first manually pre-pressurize the device to a specified value range, then fine-tune the pressurization to bring the digital pressure gauge to the specified value, and then observe whether the pointer on the pressure gauge points to the specified value. Then, continue to pressurize and repeat the above steps three to four times. The calibration operation is cumbersome and inefficient, and the pressure tube cannot be cleaned in time, which may lead to deviations in the pressure value and affect the calibration of the pressure gauge. Utility Model Content

[0004] The purpose of this invention is to provide a pressure gauge calibration device to solve the problems of the aforementioned pressure gauge calibration devices, which all involve manually pre-pressurizing the device to a specified value range, then fine-tuning the pressurization to bring the digital pressure gauge to the specified value, observing whether the pointer on the pressure gauge points to the specified value, and then continuing to pressurize and repeating the above steps three to four times. The calibration operation is cumbersome and inefficient, and the pressure tube cannot be cleaned in a timely manner, which may lead to deviations in the pressure value and affect the calibration of the pressure gauge.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure gauge calibration device, comprising a calibration platform and four support rods fixedly installed at the lower end of the calibration platform. Anti-slip pads are bonded to the lower ends of the four support rods. A piston assembly for applying pressure evenly is provided at the upper end of the calibration platform. A quick-release assembly for quickly disassembling and installing pipelines is provided on the side wall of the piston assembly. A cleaning assembly for cleaning the inner wall of the pipeline is provided on the calibration platform. A calibration assembly for calibrating the pressure gauge is provided on the calibration platform.

[0006] Preferably, the piston assembly includes a support plate fixedly mounted on a calibration table, a telescopic cylinder fixedly mounted on the lower end of the support plate, a first transfer box fixedly mounted on the calibration table, a piston tube fixedly mounted on the upper end of the first transfer box, the first transfer box and the piston tube being connected, a pressure scale being provided on the axial sidewall of the piston tube, a piston rod being slidably connected inside the piston tube, and the piston rod being fixedly connected to the telescopic end of the telescopic cylinder.

[0007] Preferably, the quick-release assembly includes a connecting pipe fixedly installed on the side wall of the first transfer box, a first mounting plate fixedly installed on the side wall of the connecting pipe, four bolts inserted through the first mounting plate, a second mounting plate inserted through the four bolts, a pressure pipe body fixedly installed on the side wall of the second mounting plate, nuts threadedly connected to the axial side walls of the four bolts, and a shut-off valve connected between the two pressure pipe bodies by bolts.

[0008] Preferably, the cleaning assembly includes a chamber formed on the pressure tube body, the chamber having two sliding grooves, the two sliding grooves together slidably mounting a cleaning disc, and a spring being provided between the cleaning disc and the two sliding grooves.

[0009] Preferably, the calibration assembly includes a second transfer box fixedly connected to one end of the pressure tube body by bolts, a first mounting pipe fixedly installed on the upper end of the second transfer box, a digital pressure gauge being installed on the first mounting pipe by a sleeve thread, a third transfer box connected to the second transfer box through the pressure tube body, a second mounting pipe fixedly installed on the upper end of the third transfer box, a pressure gauge body being threaded on the second mounting pipe, and a pressure relief valve being provided on the side wall of the third transfer box.

[0010] Preferably, the cleaning disc is in contact with the inner wall of the pressure tube body.

[0011] Preferably, the piston size on the piston rod is the same as the inner diameter of the piston tube.

[0012] Compared with existing technologies, the beneficial effects of this utility model are:

[0013] 1. Install the digital pressure gauge and its body onto the calibration device. With the cooperation of the shut-off valve, telescopic cylinder, piston rod, and piston tube, the gas in the piston tube is compressed to form air pressure, which is then forced into the pressure tube body. The pressure scale here accurately describes the applied air pressure. At this time, the digital pressure gauge displays the pressure value, and the pointer on the pressure gauge body will rotate to the specified pressure value. Subsequently, the telescopic cylinder applies pressure again, increasing the air pressure according to the specified calibration value, thereby calibrating the pressure gauge body. The use of the telescopic cylinder and pressure scale allows for precise pressurization to the specified pressure value and continuous pressurization to the next specified pressure value, greatly improving the efficiency of the calibration work.

[0014] 2. With the cooperation of the telescopic cylinder, pressure, first transfer box, pressure tube body, cleaning disc and slide, the cleaning disc can clean the inner wall of the pressure tube body to prevent dust from accumulating and causing pressure to be unable to be transmitted. When no pressure is applied, the cleaning disc will return to its original position by the action of the spring. After the experiment, the pressure tube body can be disassembled by bolts and nuts to clean the inside of the pressure tube body in a centralized manner for the next use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the piston assembly of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the quick-release component of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the cleaning component of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged view of point A;

[0020] Figure 6 This is a three-dimensional structural diagram of the verification component of this utility model.

[0021] In the diagram: 1. Calibration platform; 11. Support rod; 12. Anti-slip pad; 2. Piston assembly; 3. Quick-release assembly; 4. Cleaning assembly; 5. Calibration assembly; 21. Support plate; 22. Telescopic cylinder; 23. First transfer box; 24. Piston tube; 25. Pressure scale; 26. Piston rod; 31. Connecting pipe; 32. Pressure tube body; 33. First mounting plate; 34. Second mounting plate; 35. Bolt; 36. Nut; 6. Shut-off valve; 41. Chamber; 42. Slide groove; 43. Cleaning disc; 44. Spring; 51. Second transfer box; 52. First mounting tube; 53. Sleeve; 54. Digital pressure gauge; 55. Third transfer box; 56. Second mounting tube; 57. Pressure gauge body; 58. Pressure relief valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1 - Figure 4 A pressure gauge calibration device includes a calibration platform 1 and four support rods 11 fixedly installed at the lower end of the calibration platform 1. Anti-slip pads 12 are glued to the lower ends of the four support rods 11. A piston assembly 2 for applying pressure evenly is provided at the upper end of the calibration platform 1. A quick-release assembly 3 for quick disassembly and installation of pipes is provided on the side wall of the piston assembly 2. A cleaning assembly 4 for cleaning the inner wall of the pipes is provided on the calibration platform 1. The cleaning assembly 4 can clean the inner wall of the pipes through pressure, avoiding blockage of the inner wall of the pipes due to long-term placement, which would cause deviation in the pressure value. A calibration assembly 5 for calibrating the pressure gauge is provided on the calibration platform 1.

[0024] The piston assembly 2 includes a support plate 21 fixedly mounted on the calibration platform 1. A telescopic cylinder 22 is fixedly mounted on the lower end of the support plate 21. A first transfer box 23 is fixedly mounted on the calibration platform 1. A piston tube 24 is fixedly mounted on the upper end of the first transfer box 23. The first transfer box 23 and the piston tube 24 are connected. A pressure scale 25 is provided on the axial side wall of the piston tube 24. Each pressure scale 25 represents a measured pressure value, which can accurately apply pressure to the pressure gauge and save a lot of time. A piston rod 26 is slidably connected inside the piston tube 24. The piston rod 26 is fixedly connected to the telescopic end of the telescopic cylinder 22.

[0025] The quick-release assembly 3 includes a connecting pipe 31 fixedly installed on the side wall of the first transfer box 23. The first transfer box 23 and the connecting pipe 31 are connected. A first mounting plate 33 is fixedly installed on the side wall of the connecting pipe 31. Four bolts 35 are inserted and connected to the first mounting plate 33. A second mounting plate 34 is inserted and connected to the four bolts 35. A pressure pipe body 32 is fixedly installed on the side wall of the second mounting plate 34. Nuts 36 are threaded on the axial side walls of the four bolts 35. A shut-off valve 6 is connected between the two pressure pipe bodies 32 by bolts 35.

[0026] The calibration component 5 includes a second transfer box 51 fixedly connected to one end of the pressure tube body 32 by bolts 35. A first mounting tube 52 is fixedly installed on the upper end of the second transfer box 51, and the second transfer box 51 and the first mounting tube 52 are connected. A digital pressure gauge 54 is threadedly installed on the first mounting tube 52 through a sleeve 53. A third transfer box 55 is connected to the second transfer box 51 through the pressure tube body 32. A second mounting tube 56 is fixedly installed on the upper end of the third transfer box 55, and the third transfer box 55 and the second mounting tube 56 are connected. A pressure gauge body 57 is threadedly installed on the second mounting tube 56. A pressure relief valve 58 is provided on the side wall of the third transfer box 55.

[0027] The piston on piston rod 26 has the same piston size as the inner diameter of piston tube 24. When telescopic cylinder 22 drives piston rod 26 to make piston movement on piston tube 24, it can transmit pressure to pressure gauge body 57, thereby realizing the calibration of pressure gauge.

[0028] In this embodiment: First, the digital pressure gauge 54 is installed onto the first mounting pipe 52 via the sleeve 53. Then, the pressure gauge body 57 is installed onto the second mounting pipe 56. Next, the shut-off valve 6 is opened, and then the telescopic cylinder 22 is activated. The telescopic end of the telescopic cylinder 22 drives the piston rod 26 to move downward on the piston tube 24, compressing the gas inside the piston tube 24 to form air pressure. This air pressure enters the pressure tube body 32, where the pressure scale 25 accurately describes the applied air pressure. Because the shut-off valve 6 is now open, the air pressure flows along the pressure tube body 32 into the second transfer box 51 and the third transfer box 55, thus allowing the digital pressure gauge 54 to display the pressure at this point. The pressure value is then measured, and the pointer on the pressure gauge body 57 rotates to the specified pressure value. Then, the pressure is applied again through the telescopic cylinder 22. The air pressure is increased according to the specified verification value to verify the pressure gauge body 57. This device eliminates the previous method of manually applying pressure and then fine-tuning the pressure to make the digital pressure gauge 54 reach the specified pressure value. The telescopic cylinder 22 and pressure scale 25 can accurately pressurize to the specified pressure value and can continuously pressurize to the next specified pressure value, which greatly improves the efficiency of verification. Then, the pressure relief valve (58) is opened to release the air pressure and check whether the pointer of the pressure gauge returns to zero, thus completing the verification of the pressure gauge.

[0029] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figure 3 , Figure 5 and Figure 6 The cleaning component 4 includes a chamber 41 opened on the pressure tube body 32. Two sliding grooves 42 are opened on the chamber 41. The cleaning disc 43 is slidably installed on the two sliding grooves 42. A spring 44 is provided between the cleaning disc 43 and the two sliding grooves 42.

[0030] The cleaning disc 43 is in contact with the inner wall of the pressure tube body 32. When pressure is applied, the air pressure in the pressure tube body 32 will drive the cleaning disc 43 to slide backward along the slide groove 42, thereby cleaning the inner wall of the pressure tube body 32 and preventing the pressure tube body 32 from becoming blocked due to lack of cleaning for a long time, which would affect the calibration of the pressure gauge.

[0031] In this embodiment: When the pressure tube body 32 is used for a long time, dust will inevitably accumulate inside the pressure tube body 32. If it is not cleaned in time, the dust will block the pressure tube body 32, thereby affecting the pressure transmission of the pressure tube body 32. At this time, the pressure is delivered from the first transfer box 23 to the pressure tube body 32 through the telescopic cylinder 22. The air pressure will drive the cleaning disc 43 to slide on the two sliding grooves 42. The cleaning disc 43 can clean the inner wall of the pressure tube body 32 to prevent dust from accumulating and causing pressure to be unable to be transmitted. When no pressure is applied, the cleaning disc 43 will return to its original position by the action of the spring 44. After the experiment is over, the pressure tube body 32 can be disassembled by the bolts 35 and nuts 36 to clean the inside of the pressure tube body 32 in a concentrated manner, so as to facilitate the next use.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure gauge calibration device, comprising a calibration platform (1) and four support rods (11) fixedly installed at the lower end of the calibration platform (1), wherein the lower ends of the four support rods (11) are bonded with anti-slip pads (12), characterized in that: The upper end of the calibration platform (1) is provided with a piston assembly (2) for applying pressure evenly. The side wall of the piston assembly (2) is provided with a quick-release assembly (3) for quickly disassembling and installing the pipeline. The calibration platform (1) is provided with a cleaning assembly (4) for cleaning the inner wall of the pipeline. The calibration platform (1) is provided with a calibration assembly (5) for calibrating the pressure gauge.

2. The pressure gauge calibration device according to claim 1, characterized in that: The piston assembly (2) includes a support plate (21) fixedly installed on the calibration table (1). A telescopic cylinder (22) is fixedly installed at the lower end of the support plate (21). A first transfer box (23) is fixedly installed on the calibration table (1). A piston tube (24) is fixedly installed at the upper end of the first transfer box (23). The first transfer box (23) and the piston tube (24) are connected. A pressure scale (25) is provided on the axial side wall of the piston tube (24). A piston rod (26) is slidably connected inside the piston tube (24). The piston rod (26) is fixedly connected to the telescopic end of the telescopic cylinder (22).

3. The pressure gauge calibration device according to claim 2, characterized in that: The quick-release assembly (3) includes a connecting pipe (31) fixedly installed on the side wall of the first transfer box (23). A first mounting plate (33) is fixedly installed on the side wall of the connecting pipe (31). Four bolts (35) are inserted and connected on the first mounting plate (33). A second mounting plate (34) is inserted and connected on the four bolts (35). A pressure pipe body (32) is fixedly installed on the side wall of the second mounting plate (34). Nuts (36) are threaded on the axial side walls of the four bolts (35). A shut-off valve (6) is connected between the two pressure pipe bodies (32) by bolts (35).

4. The pressure gauge calibration device according to claim 3, characterized in that: The cleaning assembly (4) includes a chamber (41) opened on the pressure tube body (32), and two slide grooves (42) are opened on the chamber (41). The two slide grooves (42) are slidably mounted on a cleaning disc (43), and a spring (44) is provided between the cleaning disc (43) and the two slide grooves (42).

5. The pressure gauge calibration device according to claim 3, characterized in that: The calibration component (5) includes a second transfer box (51) fixedly connected to one end of the pressure tube body (32) by bolts (35). A first installation tube (52) is fixedly installed on the upper end of the second transfer box (51). A digital pressure gauge (54) is threadedly installed on the first installation tube (52) through a sleeve (53). The second transfer box (51) is connected to a third transfer box (55) through the pressure tube body (32). A second installation tube (56) is fixedly installed on the upper end of the third transfer box (55). A pressure gauge body (57) is threadedly installed on the second installation tube (56). A pressure relief valve (58) is provided on the side wall of the third transfer box (55).

6. The pressure gauge calibration device according to claim 4, characterized in that: The cleaning disc (43) is attached to the inner wall of the pressure tube body (32).

7. A pressure gauge calibration device according to claim 2, characterized in that: The piston size on the piston rod (26) is the same as the inner diameter of the piston tube (24).

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