Pressure measurement calibration device

Abstract

The utility model belongs to the field of pressure measurement calibration devices, and particularly relates to a pressure measurement calibration device which comprises an operation table, an air pump is fixedly connected to the top face of the operation table, an air pressure pipe is connected to one end of the air pump in a penetrating mode, and threaded air outlets are formed in the top face of the air pressure pipe in an axial symmetry mode. The inner walls of the two threaded air outlets are in threaded connection with a standard pressure gauge and a to-be-detected pressure gauge respectively. The top surface of the air pressure pipe is fixedly connected with connecting blocks in an axial symmetry manner. The openable surrounding structure formed by the right side frame and the left side frame of the detection assembly and the inverted U-shaped cover body structure of the sealing cover are matched with the argon detector, so that the gas leakage condition at the joint of the standard pressure gauge and the to-be-detected pressure gauge can be detected in real time in the pressure calibration process; the argon overflowed from the inner side of the threaded gas outlet is accumulated in the inner cavity of the sealing cover and then triggers the argon detector to give an alarm, so that misjudgment of calibration caused by misalignment of a pressure meter value due to gas leakage is avoided, and the accuracy of a calibration result is ensured.

Description

A pressure measurement calibration device Technical Field

[0001] This utility model relates to the field of pressure measurement and calibration devices, specifically a pressure measurement and 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. Its applications are extremely widespread, found in almost all industrial processes and scientific research fields. It is ubiquitous in areas such as heat pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. Currently, during the production process, pressure gauges are often calibrated and tested using calibration devices before leaving the factory.

[0003] In the prior art, such as in publication number CN221594172U, a pressure measurement calibration device is disclosed, which includes a calibration device body and a fixing component. The calibration device body includes a workbench and a calibration tank. The calibration tank passes through the workbench and is fixedly connected to it. The fixing component is arranged on the calibration tank. The fixing component includes a fixing block, a groove, a fixing slot, a fixing element, a fixing cylinder, a pressure-passing slot, a sealing slot, and a sealing block. The fixing block is fixed to the calibration tank. A groove is formed on the side of the fixing block away from the calibration tank. Two fixing slots are symmetrically formed in the center of the groove. The fixing element is connected to the end of the pressure gauge to be tested. The fixing cylinder is fixed to the inner wall of the groove. A pressure-passing slot is formed on the fixing element. A sealing slot is formed on the circumferential surface of the fixing cylinder. The sealing block is fixed in the pressure-passing slot. This utility model has the advantage of facilitating the fixing of the pressure gauge to be tested onto the calibration device body.

[0004] While the aforementioned patent provides convenient fixation of the pressure gauge using a fixing component, it cannot detect whether the pressure gauge is leaking. This can easily lead to situations where the pressure loss due to gas leakage results in the same reading as the standard pressure gauge, affecting the actual accuracy of the pressure gauge. Furthermore, the method of detecting the pressure gauge is not safe enough, as gas leakage can easily cause certain safety hazards. Therefore, a pressure measurement and calibration device is proposed to address the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, which cannot detect whether a pressure gauge is leaking, and which can easily lead to situations where the pressure loss due to gas leakage results in the same reading as the standard pressure gauge, thus affecting the actual accuracy of the pressure gauge; at the same time, the methods for detecting pressure gauges are not safe enough, and gas leakage can easily cause certain safety hazards. Therefore, this utility model proposes a pressure measurement and calibration device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The pressure measurement and calibration device of this utility model includes an operating table, an air pump fixedly connected to the top surface of the operating table, a pressure pipe connected through one end of the air pump, a threaded air outlet symmetrically opened on the top surface of the pressure pipe, a standard pressure gauge and a pressure gauge to be tested respectively threadedly connected to the inner walls of the two threaded air outlets, a connecting block fixedly connected symmetrically on the top surface of the pressure pipe, a detection component fixedly connected to the top surface of the connecting block, and an argon gas inlet pipe connected through the air inlet at the top of the air pump.

[0007] The detection component includes a right side frame fixedly connected to the top surface of the connecting block. A socket is provided on the side of the right side frame, and a rod is inserted into the socket. One end of the rod is fixedly connected to a left side frame. An observation port is provided symmetrically on the side of the left side frame, and an observation window is fixedly connected inside the observation port. A base plate is fixedly connected to the bottom surface of both the right and left side frames, and the side of the base plate has a groove that matches the outer diameter of the threaded gas outlet. A sealing cap is fitted onto the top surface of the right and left side frames. An argon gas detector is fixedly connected to the inner top wall of the sealing cap, and a handle is fixedly connected to the top surface of the sealing cap.

[0008] Preferably, the insertion rod and the insertion hole on the side of the right frame form a detachable insertion structure, and the left frame and the right frame form an openable and closable enclosure structure through the insertion rod.

[0009] Preferably, the observation window is made of transparent material and its position corresponds to the display area of ​​the standard pressure gauge and the pressure gauge under test.

[0010] Preferably, the groove shape of the base plate matches the outer contour of the threaded air outlet, and the right side frame and the left side frame are fixed to the top surface of the air pressure pipe through the groove of the base plate.

[0011] Preferably, the sealing cover has an inverted U-shaped structure, and its inner cavity completely covers the enclosing space formed by the right and left frames, with the detection probe of the argon gas detector extending to the middle of the inner cavity of the sealing cover.

[0012] Preferably, a support block is fixedly connected to the bottom surface of the air pressure pipe in an axisymmetric manner, and an operating table is fixedly connected to the bottom end of the support block.

[0013] The advantages of this utility model are:

[0014] 1. This utility model, through the openable enclosure structure formed by the right and left frames of the detection component and the inverted U-shaped cover structure of the sealing cover, combined with the argon gas detector, can detect gas leakage at the connection between the standard pressure gauge and the pressure gauge under test in real time during the pressure calibration process. Argon gas overflowing from the inner side of the threaded outlet accumulates in the inner cavity of the sealing cover and triggers the alarm of the argon gas detector, thereby avoiding misjudgment of calibration due to inaccurate pressure count value caused by gas leakage, and ensuring the accuracy of calibration results;

[0015] 2. The argon gas inlet pipe of this utility model uses an air pump to input inert argon gas into the gas pressure pipe as a detection medium. Combined with the sealed detection space formed by the detection components, it can not only prevent the flammability risk caused by conventional gas leakage, but also quickly identify the small leakage amount through the argon gas detector. This dual protection ensures the safety and reliability of the device during use and effectively solves the safety hazards caused by insufficient gas properties and structural sealing in traditional detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a schematic diagram of the right and left frame structures of this utility model;

[0019] Figure 3 is a schematic diagram of the sealing cap structure of this utility model;

[0020] Figure 4 is a schematic diagram of the disassembled structure of this utility model.

[0021] In the diagram: 1. Operating table; 2. Air pump; 3. Air pressure pipe; 4. Standard pressure gauge; 5. Pressure gauge to be tested; 6. Connecting block; 7. Detection component; 71. Right side frame; 72. Insert rod; 73. Left side frame; 74. Observation window; 75. Base plate; 76. Sealing cover; 77. Argon detector; 78. Handle; 8. Argon inlet pipe; 9. Support block. 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 scope of protection of the present utility model.

[0023] Please refer to Figures 1-4. A pressure measurement and calibration device includes an operating table 1. An air pump 2 is fixedly connected to the top surface of the operating table 1. One end of the air pump 2 is connected to a pressure pipe 3. The top surface of the pressure pipe 3 has threaded air outlets symmetrically arranged on its axis. A standard pressure gauge 4 and a pressure gauge 5 to be tested are respectively threadedly connected to the inner walls of the two threaded air outlets. A connecting block 6 is fixedly connected to the top surface of the pressure pipe 3 symmetrically on its axis. A detection component 7 is fixedly connected to the top surface of the connecting block 6. The detection component 7 includes a right side frame 71 fixedly connected to the top surface of the connecting block 6. The side of the right side frame 71 has an opening... The device is equipped with an insertion hole, into which an insertion rod 72 is inserted. One end of the insertion rod 72 is fixedly connected to a left side frame 73. The side of the left side frame 73 is symmetrically provided with an observation port, and the inside of the observation port is fixedly connected to an observation window 74. The bottom surfaces of the right side frame 71 and the left side frame 73 are both fixedly connected to a base plate 75, and the side of the base plate 75 is provided with a groove that matches the outer diameter of the threaded gas outlet. The top surfaces of the right side frame 71 and the left side frame 73 are fitted with a sealing cover 76. An argon gas detector 77 is fixedly connected to the inner top wall of the sealing cover 76, and a handle 78 is fixedly connected to the top surface of the sealing cover 76.

[0024] During operation, in the pressure calibration process, the right frame 71 of the detection component 7 is fixed to the top surface of the air pressure tube 3 via the connecting block 6. Then, the insertion rod 72 is inserted into the insertion hole on the side of the right frame 71, so that the left frame 73 and the right frame 71 form a cavity surrounding the standard pressure gauge 4 and the pressure gauge 5 to be tested. The right frame 71 and the left frame 73 are then secured to the top surface of the air pressure tube 3 via the groove on the side of the base plate 75, ensuring that the cavity aligns with the threaded air outlet. The inverted U-shaped sealing cap 76 is then fitted onto the right frame 71 and... At the top of the left frame 73, the position of the sealing cover 76 can be adjusted by the handle 78 to extend the probe of the argon detector 77 to the middle of the cavity. After the gas pump 2 is started, argon gas is input into the pressure pipe 3 through the argon gas inlet pipe 8. If there is a leak at the connection of the standard pressure gauge 4 or the pressure gauge to be tested 5, the argon gas will overflow into the cavity through the threaded outlet and accumulate, triggering the argon detector 77 to issue an alarm. When the operator compares the two pressure count values ​​through the observation window 74, the leakage status can be confirmed simultaneously to avoid misjudgment of calibration due to gas leakage.

[0025] Furthermore, an air pump 2 is fixedly connected to the top surface of the operating table 1. An air pressure pipe 3 is connected through one end of the air pump 2. The top surface of the air pressure pipe 3 is symmetrically provided with threaded air outlets. The inner walls of the two threaded air outlets are respectively threaded with a standard pressure gauge 4 and a pressure gauge to be tested 5. An argon gas inlet pipe 8 is connected through the air inlet at the top of the air pump 2.

[0026] During operation, inert argon gas is introduced into the gas pump 2 through the argon inlet pipe 8. After being pressurized by the gas pump 2, it is delivered into the pressure pipe 3. The argon gas enters the standard pressure gauge 4 and the pressure gauge under test 5 simultaneously through the axisymmetrically distributed threaded outlets. In the cavity formed by the right frame 71 and the left frame 73 of the detection component 7, if the argon gas leaks from the pressure gauge connection, it enters the gap between the groove of the base plate 75 and the top surface of the pressure pipe 3 along the outer wall of the threaded outlet and diffuses into the sealed space covered by the sealing cover 76. The argon gas detector 77 monitors the gas concentration in the sealed space in real time. When an abnormal argon gas content is detected, an alarm is immediately triggered. Combined with the inert properties of argon gas, it prevents the leaked gas from exploding when it comes into contact with fire. At the same time, the two pressure count values ​​are directly read through the observation window 74 for calibration.

[0027] Furthermore, the insertion rod 72 and the insertion hole on the side of the right frame 71 form a detachable insertion structure, and the left frame 73 and the right frame 71 form an openable enclosure structure through the insertion rod 72;

[0028] During operation, when installing the testing component 7, the operator inserts the insertion rod 72 horizontally along the insertion hole on the side of the right frame 71, so that the left frame 73 and the right frame 71 form an openable enclosure structure. When it is necessary to enclose the standard pressure gauge 4 and the pressure gauge 5 to be tested, the left frame 73 is pushed to slide the insertion rod 72 to the closed position, so that the grooves of the bottom plates 75 of the right frame 71 and the left frame 73 are locked onto the outer wall of the threaded outlet on the top surface of the pressure tube 3, ensuring the cavity is sealed. After the test is completed, the insertion rod 72 is pulled out in the opposite direction to separate the left frame 73 from the right frame 71, facilitating quick disassembly of the pressure gauge. This structure, through the detachable design of the insertion rod 72, enables the testing component 7 to open and close flexibly, which simplifies the installation steps of the pressure gauge, ensures a tight connection between the cavity and the pressure tube 3, avoids argon leakage due to structural loosening during the test, and improves maintenance efficiency.

[0029] Furthermore, the observation window 74 is made of transparent material, and its position corresponds to the display area of ​​the standard pressure gauge 4 and the pressure gauge under test 5;

[0030] During operation, in the pressure calibration process, the operator can directly read the displayed values ​​of the standard pressure gauge 4 and the pressure gauge under test 5 through the observation window 74, which is symmetrically arranged on the side of the left frame 73. The transparent observation window 74 covers the observation port of the left frame 73, and its position precisely corresponds to the scale area of ​​the two pressure gauges, ensuring that pressure changes can be monitored in real time without opening the sealing cover 76. Combined with the sealed cavity of the detection component 7, the operator can simultaneously compare the data of the two pressure gauges through the observation window 74 while the argon gas detector 77 monitors for leaks, quickly determining the accuracy of the pressure gauge under test 5. This design, through the alignment of the transparent observation window 74 with the pressure gauge display area, achieves full visualization of the calibration process, avoids frequent disassembly of the sealing cover 76 which interferes with the detection environment, improves calibration efficiency, reduces the risk of argon gas leakage, and ensures operational safety and data reliability.

[0031] Working principle: The air pump 2 on the top surface of the operating table 1 draws in inert argon gas through the argon gas inlet pipe 8 and pressurizes it to the pressure pipe 3. The argon gas enters the standard pressure gauge 4 and the pressure gauge to be tested 5 simultaneously through the threaded outlets symmetrically distributed on the top surface of the pressure pipe 3. The right frame 71 of the detection component 7 is fixed to the top surface of the pressure pipe 3 by the connecting block 6. After the insertion rod 72 is inserted into the side insertion hole of the right frame 71, it drives the left frame 73 to close, so that the grooves of the bottom plates 75 of the right frame 71 and the left frame 73 are locked with the outer wall of the threaded outlet to form a sealed cavity. The inverted U-shaped sealing cover 76 covers the right frame 71 and the left frame 73. At the top of frame 73, the argon gas detector 77 on the inner top wall monitors the argon gas concentration in the cavity in real time. If a leak occurs at the connection between the standard pressure gauge 4 or the pressure gauge 5 to be tested, the argon gas will overflow into the cavity through the threaded outlet and be identified and alarmed by the argon gas detector 77. The operator can directly read the two pressure count values ​​through the transparent observation window 74 symmetrically set on the side of the left frame 73 for comparison and calibration. At the same time, the triangular structure of the support block 9 enhances the connection stability between the air pressure pipe 3 and the operating table 1, ensuring that there is no vibration interference during the calibration process when the air pump 2 continuously supplies pressure, so as to achieve simultaneous safe testing and accurate calibration.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure measurement and calibration device, characterized in that: The system includes an operating table (1), on the top surface of which an air pump (2) is fixedly connected. One end of the air pump (2) is connected to a pressure pipe (3). The top surface of the pressure pipe (3) is symmetrically provided with threaded air outlets. The inner walls of the two threaded air outlets are respectively threaded with a standard pressure gauge (4) and a pressure gauge to be tested (5). The top surface of the pressure pipe (3) is symmetrically connected with a connecting block (6). The top surface of the connecting block (6) is fixedly connected with a detection component (7). The air inlet at the top of the air pump (2) is connected to an argon gas inlet pipe (8). The detection component (7) includes a right side frame (71) fixedly connected to the top surface of the connecting block (6). The side of the right side frame (71) has a side The first frame has an insertion hole, into which a rod (72) is inserted. One end of the rod (72) is fixedly connected to a left frame (73). The side of the left frame (73) has an observation port that is symmetrically arranged on the side. The observation port has an observation window (74) fixedly connected inside. The bottom surfaces of the right frame (71) and the left frame (73) are both fixedly connected to a base plate (75), and the side of the base plate (75) has a groove that matches the outer diameter of the threaded gas outlet. The top surfaces of the right frame (71) and the left frame (73) are fitted with a sealing cover (76). The inner top wall of the sealing cover (76) is fixedly connected to an argon gas detector (77), and the top surface of the sealing cover (76) is fixedly connected to a handle (78).

2. The pressure measurement and calibration device according to claim 1, characterized in that: The insertion rod (72) and the insertion hole on the side of the right frame (71) form a detachable insertion structure, and the left frame (73) and the right frame (71) form an openable enclosure structure through the insertion rod (72).

3. The pressure measurement and calibration device according to claim 1, characterized in that: The observation window (74) is made of transparent material and its position corresponds to the display area of ​​the standard pressure gauge (4) and the pressure gauge to be tested (5).

4. The pressure measurement and calibration device according to claim 1, characterized in that: The groove shape of the base plate (75) matches the outer contour of the threaded air outlet, and the right side frame (71) and the left side frame (73) are fixed to the top surface of the air pressure pipe (3) through the groove of the base plate (75).

5. A pressure measurement and calibration device according to claim 1, characterized in that: The sealing cover (76) has an inverted U-shaped structure, and its inner cavity completely covers the enclosed space formed by the right side frame (71) and the left side frame (73). The detection probe of the argon gas detector (77) extends to the middle of the inner cavity of the sealing cover (76).

6. The pressure measurement and calibration device according to claim 1, characterized in that: The bottom surface of the air pressure pipe (3) is fixedly connected to a support block (9) in an axisymmetric manner, and the bottom end of the support block (9) is fixedly connected to an operating table (1).

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