Pressure gauge calibration device

Abstract

The invention discloses a pressure gauge calibration device, which relates to the technical field of pressure gauge calibration, and comprises a calibration table, the upper end face of the calibration table is symmetrically and fixedly connected with connecting pipes, the upper ends of the two connecting pipes are respectively in threaded connection with a standard pressure gauge and a detected pressure gauge, and the upper end face of the calibration table is fixedly connected with a pressure cylinder. A pressurizing rod is rotatably connected to the upper end face of the pressurizing air cylinder, a pressurizing micro-adjusting valve is fixedly connected to the side wall of the pressurizing air cylinder, and an adjusting rod is in threaded connection with the side, away from the pressurizing air cylinder, of the pressurizing micro-adjusting valve. According to the pressure gauge leakage monitoring device, the pressure gauge leakage monitoring device can be used for monitoring the leakage of a pressure gauge, reminding a worker of leakage in the pressure gauge detection process, sensitively capturing trace leakage which is difficult to perceive by naked eyes, actively giving an alarm in the initial stage of pressure deviation generation, and advancing a problem discovery node from post-event investigation to occurrence moment, so that zero-delay monitoring of the leakage is realized.

Description

Technical Field

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

[0002] A pressure gauge calibration device is a specialized device used to verify and calibrate the accuracy of various pressure instruments. It generates a precise and known pressure value and compares it with the reading of the pressure gauge being calibrated, thereby judging and adjusting its accuracy. During the calibration process of pressure gauges, the pressure gauges are typically installed on the calibration device via threads. However, over time, the threads wear down, creating tiny gaps in the connection between the pressure gauge and the calibration device. These gaps are difficult for operators to detect in time. These gaps not only cause system pressure leakage, resulting in actual pressures lower than the standard value set by the calibration device and lower readings on the pressure gauge, leading to incorrect calibration results, but also cause pressure fluctuations or lags during rapid pressurization or depressurization, affecting the pressure gauge's ability to track dynamic pressure. Furthermore, if the gap widens over time, the leakage increases, and calibration errors gradually accumulate, eventually leading to overall deviations within the pressure gauge's range. Additionally, gaps can cause initial calibration failures, requiring repeated disassembly, inspection, and reinstallation, increasing operation time and labor costs.

[0003] Therefore, this invention proposes a pressure gauge calibration device to solve the above problems. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a pressure gauge calibration device that can effectively solve the problems in existing technologies.

[0005] (II) Technical Solution To achieve the above objectives, the present invention can be accomplished through the following technical solutions: A pressure gauge calibration device includes a calibration platform. Connecting pipes are symmetrically and fixedly connected to the upper surface of the calibration platform. A standard pressure gauge and a pressure gauge under test are threadedly connected to the upper ends of the two connecting pipes, respectively. A pressure-applying cylinder is fixedly connected to the upper surface of the calibration platform. A pressure-applying rod is rotatably connected to the upper surface of the pressure-applying cylinder. A pressure-boosting fine-tuning valve is fixedly connected to the side wall of the pressure-applying cylinder. An adjusting rod is threadedly connected to the side of the pressure-boosting fine-tuning valve away from the pressure-applying cylinder. The device also includes a connection leakage detection mechanism and a pressure adjustment reference mechanism. The connection leakage detection mechanism includes a collar disposed between the standard pressure gauge, the pressure gauge under test, and the connecting pipes. A hollow column is fixedly connected to the outer surface of the collar. An extension column is slidably connected to the end of the hollow column away from the collar. The connection leakage detection mechanism is used to detect leakage at the connection of the connecting pipes during the pressure application process to the standard pressure gauge and the pressure gauge under test. The pressure adjustment reference mechanism is used to facilitate the operator's understanding of the manually adjusted pressure value.

[0006] As a further embodiment of the present invention: a mounting bracket is fixedly connected to the outer surface of the collar near the extension post, an alarm light is fixedly connected to the side of the mounting bracket away from the extension post, and a button is fixedly connected to the side of the mounting bracket near the extension post; the alarm light and the button are electrically connected.

[0007] As a further embodiment of the present invention: vertical plates are provided on both sides of the connecting pipe, and sliding columns are equidistantly connected through the vertical plates. A sealing ring is fixedly connected to the side of the sliding column near the connecting pipe, and a rubber plate is fixedly connected to the side of the sealing ring near the connecting pipe.

[0008] As a further aspect of the present invention: the radius of the sealing ring decreases sequentially from bottom to top, and the bottommost sealing ring is in contact with the upper end face of the collar. The sealing rings are all in contact with each other. On one side of the sealing ring, a sealing plate is symmetrically fixedly connected to the side of the collar. On the other side of the sealing ring, a sealing groove is symmetrically opened on the side of the collar. The sealing plate and the sealing groove are interlocked with each other.

[0009] As a further aspect of the present invention: a disc is fixedly connected to the outer surface of the sliding column on the side away from the sealing ring, and a spring is fixedly connected between the disc and the vertical plate, and the spring is sleeved on the outer surface of the sliding column.

[0010] As a further aspect of the present invention: vertical grooves are provided on each of the vertical plates, and sliding plates are slidably connected in each of the vertical grooves. Lifting blocks are fixedly connected to the side of each sliding plate away from the vertical plate on both sides. A central plate is fixedly connected between the two sliding plates at the center. The upper part of the central plate and the push plate near the sliding column is set as an inclined surface. The sliding column is attached to the side wall of the central plate and the push plate.

[0011] As a further embodiment of the present invention: a lifting block is fixedly connected to the side wall of the center plate, and a linkage frame is fixedly connected to both sides of the lifting block. The side of the linkage frame away from the lifting block is fixedly connected to the side wall of the push plate. A threaded rod is threadedly connected through the center of the lifting block. A support block is rotatably connected to the lower end of the threaded rod. The support block is fixedly connected to the side wall of the calibration table. A knob is fixedly connected to the upper end of the threaded rod.

[0012] As a further aspect of the present invention: the pressure adjustment reference mechanism includes a connecting ring and a moving ring. The moving ring is slidably connected to the outer surface of the pressure boosting fine-tuning valve, and the connecting ring is rotatably connected to the outer surface of the adjusting rod. A connecting frame is symmetrically fixedly connected to the outer surface of the connecting ring, and the end of the connecting frame away from the connecting ring is fixedly connected to the moving ring.

[0013] As a further embodiment of the present invention: a horizontal plate is provided above the moving ring, the horizontal plate is fixedly connected to the side wall of the pressure cylinder, a through groove is provided on the horizontal plate, a slider is slidably connected in the through groove, the slider is fixedly connected to the outer surface of the moving ring, pointers are fixedly connected to both sides of the slider, and scale bars are symmetrically and equidistantly fixedly connected to the upper surface of the horizontal plate, the pointers and scale bars correspond to each other.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a pressure gauge calibration device, which has the following advantages: 1. The connection leak detection mechanism automatically extends the extension column from the hollow column when a leak occurs at the connection. Pressing the button activates the alarm light, alerting staff to the leak during pressure gauge testing. It not only keenly detects minute leaks that are difficult to see with the naked eye, but also proactively warns at the initial stage of pressure deviation, shifting the problem detection point from "post-incident investigation" to "the moment of occurrence," achieving zero-delay monitoring of leaks. Furthermore, by eliminating pressure distortion caused by leaks at the source, it effectively ensures a high degree of consistency between the system pressure and the standard value, thereby ensuring the authenticity and reliability of the pressure gauge readings, significantly improving the confidence and authority of calibration data. Early intervention prevents the leak from widening, fundamentally cutting off the accumulation of errors caused by increased leakage, ensuring that the pressure gauge maintains continuous and consistent accuracy at every calibration point throughout its entire range.

[0015] 2. By using a sealing ring, rubber plate, sealing plate, and sealing groove, the sealing performance between the collar and the standard pressure gauge and the pressure gauge under test is improved after installation. This not only creates a multi-layered, tightly fitted static sealing environment that effectively resists various pressure fluctuations and fundamentally eliminates any possible leakage paths under stable pressure, thus building an absolutely reliable sealing foundation for the calibration process, but also ensures that the standard pressure value generated by the calibration device is transmitted to the sensing element of the pressure gauge under test without loss or damage. This completely eliminates the indication deviation caused by pressure leakage and provides a core guarantee for the absolute accuracy of the calibration results.

[0016] 3. By tightly fitting the sealing ring and the collar, and with different sealing ring radii, the sealing ring can clamp and seal on standard pressure gauges and pressure gauges under test of different diameters. This not only broadens the application range of the calibration device, making it a universal platform capable of handling various specifications of instruments, significantly improving the application value and asset utilization of the equipment, but also allows the sealing rings of different radii to intelligently conform to the microscopic contours of different pipelines under the constraint of the collar, forming a continuous, uniform, and seamless sealing contact ring. This ensures that the pressure medium has no gaps in any direction, achieving all-round sealing protection.

[0017] 4. The pressure adjustment reference mechanism allows operators to accurately understand the adjustment value of the adjustment rod when adjusting the pressure value of the pressure gauge under test through the adjustment rod and the pressure boosting fine-tuning valve. The precise numerical feedback not only provides the operator with clear operation guidance and immediate effect confirmation, making them fully aware of the pressure changes caused by each fine-tuning action, but also allows the operator to quickly approach the target pressure point with the fewest actions and the shortest path, greatly reducing the time spent on repeated trials and overcorrections. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram of region A in the middle; Figure 3 For the present invention Figure 1 Enlarged structural diagram of region B in the middle; Figure 4 This is a schematic diagram of the outer surface connection structure of the collar of the present invention; Figure 5 For the present invention Figure 1 Another perspective structural diagram; Figure 6 For the present invention Figure 5 Enlarged structural diagram of region C in the middle; Figure 7 This is a schematic diagram of the upper end face structure of the collar of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the D region.

[0020] In the diagram: 1. Calibration stand; 2. Connecting pipe; 3. Standard pressure gauge; 4. Pressure gauge under test; 501. Collar; 502. Hollow Column; 503. Extension Column; 504. Mounting Bracket; 505. Alarm Light; 506. Button; 507. Support Block; 508. Threaded Rod; 509. Knob; 510. Lifting Block; 511. Linkage Frame; 512. Vertical Plate; 513. Vertical Groove; 514. Slide Plate; 515. Push Plate; 516. Sliding Column; 517. Disc; 518. Spring; 519. Sealing Ring; 520. Rubber Plate; 521. Center Plate; 522. Sealing Plate; 523. Sealing Groove; 601. Horizontal plate; 602. Scale bar; 603. Connecting ring; 604. Connecting bracket; 605. Moving ring; 606. Slider; 607. Pointer; 608. Through slot; 7. Pressure cylinder; 8. Pressure rod; 9. Adjusting rod; 10. Pressure boosting fine-tuning valve. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] This embodiment provides a pressure gauge calibration device, such as... Figure 1 - Figure 8As shown, the system includes a calibration platform 1, with connecting pipes 2 symmetrically fixedly connected to the upper surface of the calibration platform 1. A standard pressure gauge 3 and a pressure gauge under test 4 are threadedly connected to the upper ends of the two connecting pipes 2, respectively. A pressure-applying cylinder 7 is fixedly connected to the upper surface of the calibration platform 1, and a pressure-applying rod 8 is rotatably connected to the upper surface of the pressure-applying cylinder 7. A pressure-boosting fine-tuning valve 10 is fixedly connected to the side wall of the pressure-applying cylinder 7, and an adjusting rod 9 is threadedly connected to the side of the pressure-boosting fine-tuning valve 10 away from the pressure-applying cylinder 7. The system also includes a connection leakage detection mechanism and a pressure adjustment reference mechanism. The connection leakage detection mechanism includes a collar 501, which is positioned between the standard pressure gauge 3, the pressure gauge under test 4, and the connecting pipes 2. A hollow column 502 is fixedly connected to the outer surface of the collar 501, and an extension column 503 is slidably connected to the end of the hollow column 502 away from the collar 501. The connection leakage detection mechanism is used to detect leakage at the connection of the connecting pipes 2 during the pressure application process to the standard pressure gauge 3 and the pressure gauge under test 4.

[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, a mounting bracket 504 is fixedly connected to the outer surface of the collar 501 near the extension post 503. An alarm light 505 is fixedly connected to the side of the mounting bracket 504 away from the extension post 503. A button 506 is fixedly connected to the side of the mounting bracket 504 near the extension post 503. The alarm light 505 and the button 506 are electrically connected. When a leak occurs inside the collar 501, gas will enter the hollow post 502, push the extension post 503 out, press the button 506, and turn on the alarm light 505 to start working.

[0024] In this embodiment, as Figure 7 As shown, vertical plates 512 are provided on both sides of the connecting pipe 2. Sliding columns 516 are equidistantly connected to each vertical plate 512. A sealing ring 519 is fixedly connected to the side of the sliding column 516 near the connecting pipe 2. A rubber plate 520 is fixedly connected to the side of the sealing ring 519 near the connecting pipe 2. When the sealing plate 522 moves horizontally close to the standard pressure gauge 3 and the pressure gauge under test 4, the rubber plate 520 connected to the side wall of the sealing plate 522 will be squeezed onto the outer surface of the standard pressure gauge 3 and the pressure gauge under test 4, thereby improving the sealing performance between the sealing plate 522 and the standard pressure gauge 3 and the pressure gauge under test 4.

[0025] In this embodiment, as Figure 7 and Figure 8As shown, the radius of the sealing rings 519 decreases from bottom to top. The bottom sealing rings 519 are all in contact with the upper end face of the collar 501. The sealing rings 519 are all in contact with each other. On one side of the sealing rings 519, a sealing plate 522 is symmetrically fixedly connected to the side of the collar 501. On the other side of the sealing rings 519, a sealing groove 523 is symmetrically opened on the side of the collar 501. The sealing plate 522 and the sealing groove 523 are interlocked. When the sealing rings 519 are close to each other, the sealing plate 522 will be driven into the sealing groove 523 on the other side, increasing the sealing performance between the two sealing rings 519.

[0026] In this embodiment, as Figure 6 As shown, a disc 517 is fixedly connected to the outer surface of the sliding column 516 away from the sealing ring 519. A spring 518 is fixedly connected between the disc 517 and the vertical plate 512. The springs 518 are all sleeved on the outer surface of the sliding column 516. When the sliding column 516 is subjected to force and slides on the vertical plate 512, it will drive the disc 517 to squeeze the spring 518. When the force on the sliding column 516 disappears, the rebound force of the spring 518 can push the disc 517 to drive the sliding column 516 to move in the opposite direction.

[0027] In this embodiment, as Figure 7 As shown, vertical grooves 513 are provided on each vertical plate 512, and sliding plates 514 are slidably connected in each vertical groove 513. Lifting blocks 510 are fixedly connected to the side of each sliding plate 514 away from the vertical plate 512. A central plate 521 is fixedly connected between the two sliding plates 514 at the center. The upper part of the central plate 521 and the push plate 515 near the sliding column 516 is set as an inclined surface. The sliding column 516 is attached to the side wall of the central plate 521 and the push plate 515. Through the sliding connection of the sliding plates 514 and the vertical grooves 513, the central plate 521 and the push plate 515 can slide up and down on the vertical plate 512, pushing the sliding column 516 to move horizontally on the vertical plate 512.

[0028] In this embodiment, as Figure 5 and Figure 6 As shown, a lifting block 510 is fixedly connected to the side wall of the center plate 521. A linkage frame 511 is fixedly connected to both sides of the lifting block 510. The side of the linkage frame 511 away from the lifting block 510 is fixedly connected to the side wall of the push plate 515. A threaded rod 508 is threadedly connected through the center of the lifting block 510. A support block 507 is rotatably connected to the lower end of the threaded rod 508. The support block 507 is fixedly connected to the side wall of the calibration table 1. A knob 509 is fixedly connected to the upper end of the threaded rod 508. When the knob 509 is rotated, the threaded rod 508 is rotated. When the lifting block 510 is driven to slide up and down through the threaded connection between the threaded rod 508 and the lifting block 510, the lifting block 510 can drive the center plate 521 and the push plate 515 to move up and down synchronously through the linkage frames 511 connected to both sides.

[0029] In existing technologies, threads wear down over time, leading to tiny gaps in the connection between the pressure gauge and calibration device. These gaps are difficult for operators to detect in time. These gaps not only cause system pressure leakage, resulting in actual pressure lower than the standard value set by the calibration device and lower pressure gauge readings, leading to incorrect calibration results, but also cause pressure fluctuations or lags during rapid pressurization or depressurization, affecting the pressure gauge's ability to track dynamic pressure. Furthermore, if the gap widens over time, the leakage increases, and calibration errors gradually accumulate, eventually leading to overall deviations within the pressure gauge's range. Additionally, gaps cause initial calibration failures, requiring repeated disassembly, inspection, and reinstallation, increasing operation time and labor costs. Compared to existing technologies, this new technology can automatically extend the extension column 503 from the hollow column during leakage at the connection point. The 502 internal release involves pressing button 506 to activate alarm light 505, alerting staff to leaks during pressure gauge testing. It not only detects minute leaks imperceptible to the naked eye but also proactively warns at the initial stage of pressure deviation, shifting the problem detection point from "post-incident investigation" to "the moment of occurrence," achieving zero-delay monitoring of leaks. Furthermore, by eliminating pressure distortion caused by leaks at the source, it effectively ensures a high degree of consistency between system pressure and standard values, thereby guaranteeing the accuracy and reliability of pressure gauge readings and significantly improving the confidence and authority of calibration data. Early intervention prevents leaks from widening, fundamentally cutting off the accumulation of errors caused by increased leakage, ensuring consistent and uniform accuracy at every calibration point across the entire range of the pressure gauge.

[0030] At other levels, this embodiment also provides a pressure adjustment reference mechanism to facilitate workers' understanding of manually adjusted pressure values, such as... Figure 1 and Figure 3 As shown, the pressure adjustment reference mechanism includes a connecting ring 603 and a moving ring 605. The moving ring 605 is slidably connected to the outer surface of the pressure boosting fine-tuning valve 10, and the connecting ring 603 is rotatably connected to the outer surface of the adjusting rod 9. A connecting frame 604 is symmetrically fixedly connected to the outer surface of the connecting ring 603, and the end of the connecting frame 604 away from the connecting ring 603 is fixedly connected to the moving ring 605.

[0031] In this embodiment, as Figure 3As shown, a horizontal plate 601 is provided above the moving ring 605. The horizontal plate 601 is fixedly connected to the side wall of the pressure cylinder 7. A through groove 608 is provided on the horizontal plate 601. A slider 606 is slidably connected in the through groove 608. The slider 606 is fixedly connected to the outer surface of the moving ring 605. A pointer 607 is fixedly connected to both sides of the slider 606. A scale bar 602 is symmetrically and equidistantly fixedly connected to the upper end face of the horizontal plate 601. The pointer 607 and the scale bar 602 correspond to each other. When the moving ring 605 drives the slider 606 to slide in the through groove 608, it can synchronously drive the pointer 607 to move. By changing the scale bar 602 pointed to by the pointer 607, the distance moved by the moving ring 605 can be known.

[0032] Compared with existing technologies, this method allows operators to accurately understand the adjustment value of the adjustment lever 9 when adjusting the pressure value of the pressure gauge 4 under test through the adjustment lever 9 and the pressure boosting fine-tuning valve 10. The precise numerical feedback not only provides the operator with clear operating guidance and immediate effect confirmation, making them fully aware of the pressure changes caused by each fine-tuning action, but also allows the operator to quickly approach the target pressure point with the fewest actions and the shortest path, greatly reducing the time spent on repeated trials and overcorrections.

[0033] The overall working process and principles involved in the above embodiments are as follows: When the staff needs to perform pressure testing on the pressure gauge 4 under test, the pressure gauge 4 under test and the standard pressure gauge 3 are first connected to the upper end of the connecting pipe 2 through the collar 501 via threaded connection. Then, the knob 509 is turned, which drives the threaded rod 508 to rotate on the upper end face of the support block 507. Since the outer surface of the threaded rod 508 is threadedly connected to the lifting block 510, and both sides of the lifting block 510 are connected to the linkage frame 511, the lifting block 510 and the linkage frame 511 are respectively connected to the center plate 521 and the push plate 515. The center plate 521 and the push plate 515 are both The slide plate 514 and the vertical groove 513 are slidably connected to the vertical plate 512. Therefore, as the threaded rod 508 rotates, it can drive the lifting block 510 to move vertically upward on the outer surface of the threaded rod 508. This causes the lifting block 510 to drive the push plate 515 and the center plate 521 to rise synchronously through the linkage frame 511. At this time, the center plate 521 and the push plate 515 will push the sliding column 516 to slide horizontally on the vertical plate 512 through the inclined surface on the side wall. This will drive the sealing ring 519 to move horizontally closer to the connecting pipe 2, clamping the pipe between the standard pressure gauge 3 and the pressure gauge under test 4. The standard pressure gauge 3 and the pressure gauge under test 4 are sealed at the connection with the collar 501. When the two sealing rings 519 approach each other, the sealing plate 522 connected to the side wall of one sealing ring 519 will simultaneously engage with the sealing groove 523 opened on the side wall of the other sealing ring 519. At the same time, the rubber plate 520 connected to the inner ring surface of the sealing ring 519 is pressed against the outer surface of the standard pressure gauge 3 and the pressure gauge under test 4. After the standard pressure gauge 3 and the pressure gauge under test 4 are installed, the collar 501 and the standard pressure gauge 3 are sealed at the connection with the collar 501. The sealing between the pressure gauges 4 not only forms a multi-layered, tightly fitting static sealing ring 519 environment that can effectively resist various pressure fluctuations and fundamentally eliminate any possible leakage paths under stable pressure, thus building an absolutely reliable sealing foundation for the calibration process, but also ensures that the standard pressure value generated by the calibration device can be transmitted to the sensing element of the pressure gauge 4 under test without loss or damage, completely eliminating the indication deviation caused by pressure leakage and providing a core guarantee for the absolute accuracy of the calibration results; When the radius of the lowest sealing ring 519 is too large to fit against the outer surfaces of the standard pressure gauge 3 and the pressure gauge under test 4, as the center plate 521 continues to rise, it will push the different sealing rings 519 closer to the standard pressure gauge 3 and the pressure gauge under test 4 until the sealing rings 519 and the standard pressure gauge 3 fit against the outer surfaces of the pressure gauge under test 4. This allows the sealing rings 519 to clamp and seal on the pipes of the standard pressure gauge 3 and the pressure gauge under test 4 with different diameters. This not only broadens the application range of the calibration device, making it a general-purpose platform that can handle various specifications of instruments, but also significantly improves the application value and asset utilization of the equipment. Moreover, under the constraint of the collar 501, the sealing rings 519 with different radii can intelligently fit the micro-contours of different pipes to form a continuous, uniform and dead-angle-free sealing contact ring, ensuring that the pressure medium has no gaps in any direction and achieving all-round sealing protection. After the operator seals and secures the standard pressure gauge 3 and the pressure gauge under test 4, they can repeatedly press down the pressure rod 8 to apply pressure to the standard pressure gauge 3 and the pressure gauge under test 4 through the pressurization air pipe. During the pressurization process, if a leak occurs at the connection between the standard pressure gauge 3 and the pressure gauge under test 4 and the connecting pipe 2, the gas will enter the collar 501 and then the hollow column 502, pushing out the extension column 503 slidably connected inside the hollow column 502. This causes the extension column 503 to press the button 506 connected to the side wall of the mounting bracket 504. At this time, the button 506 is electrically connected to the alarm light 505, which will turn on the alarm light 505 to alert the operator. When a leak occurs during pressure gauge testing, the system can not only keenly detect minute leaks that are difficult to see with the naked eye, but also proactively issue warnings at the initial stage of pressure deviation. This shifts the problem detection point from "post-incident investigation" to "the moment of occurrence," achieving zero-delay monitoring of leaks. Furthermore, by eliminating pressure distortion caused by leaks at the source, it effectively ensures a high degree of consistency between the system pressure and the standard value, thereby ensuring the authenticity and reliability of the pressure gauge readings. This significantly improves the confidence and authority of calibration data. Moreover, by intervening early to prevent the leak from widening, it fundamentally cuts off the accumulation of errors caused by increased leakage, ensuring that the pressure gauge maintains continuous and consistent accuracy at every calibration point throughout the entire range. After pressurizing the standard pressure gauge 3 and the pressure gauge under test 4, the operator can rotate the adjusting rod 9 to adjust the values ​​of the standard pressure gauge 3 and the pressure gauge under test 4 through the pressure boosting fine-tuning valve 10. During the rotation of the adjusting rod 9, the threaded connection between the adjusting rod 9 and the pressure boosting fine-tuning valve 10 allows the adjusting rod 9 to slide out from inside the pressure boosting fine-tuning valve 10. At this time, since the outer surface of the adjusting rod 9 is rotatably connected to the connecting ring 603, the connecting ring 603 is connected to the moving ring 605 through the connecting bracket 604. The moving ring 605 is slidably connected to the outer surface of the pressure boosting fine-tuning valve 10. Therefore, as the adjusting rod 9 rotates and slides out from inside the pressure boosting fine-tuning valve 10, it will drive the moving ring 605 to move horizontally synchronously on the outer surface of the pressure boosting fine-tuning valve 10 through the connecting ring 603 and the connecting bracket 604. During the movement of 05, the moving ring 605 will drive the slider 606 connected to the outer surface to move horizontally synchronously inside the through groove 608 opened on the horizontal plate 601. Since pointers 607 are connected to both sides of the slider 606, and the pointers 607 correspond to the scale bars 602, as the slider 606 moves, it will drive the pointers 607 to point to different scale bars 602, which makes it easy for the staff to accurately understand the adjustment value of the adjustment rod 9. The accurate numerical feedback not only provides the operator with clear operation guidance and immediate effect confirmation, making him clear about the pressure changes produced by each fine adjustment action, but also the intuitive adjustment value allows the operator to quickly approach the target pressure point with the fewest actions and the shortest path, greatly reducing the time spent on repeated trials and overcorrections. After the operator completes the test on the pressure gauge 4, the operator can rotate the knob 509 in the opposite direction to rotate the threaded rod 508 in the opposite direction. This drives the lifting block 510, which is threaded to the outer surface of the threaded rod 508, to descend. The lifting block 510, through the linkage frame 511, drives the center plate 521 and the push plate 515 to descend synchronously. This causes the sliding column 516 to slide along the vertical surface of the side wall of the center plate 521 and the push plate 515 to the inclined surface. At this time, since the outer surface of the sliding column 516 is connected to the disc 517, and the disc 517 and the vertical plate 512 are connected by a spring 518, the spring 518 can push the sliding column 516 to move in the opposite direction. This causes the sealing rings 519 to move away from each other and separate from the standard pressure gauge 3 and the pressure gauge 4 under test, releasing the clamping of the standard pressure gauge 3 and the pressure gauge 4 under test, so that the operator can remove the standard pressure gauge 3 and the pressure gauge 4 under test from the connecting pipe 2.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure gauge calibration device, comprising a calibration platform (1), wherein connecting pipes (2) are symmetrically and fixedly connected to the upper end of the calibration platform (1), and a standard pressure gauge (3) and a pressure gauge under test (4) are respectively threaded to the upper ends of the two connecting pipes (2), a pressure cylinder (7) is fixedly connected to the upper end of the calibration platform (1), a pressure rod (8) is rotatably connected to the upper end of the pressure cylinder (7), a pressure boosting fine-tuning valve (10) is fixedly connected to the side wall of the pressure cylinder (7), and an adjusting rod (9) is threadedly connected to the side of the pressure boosting fine-tuning valve (10) away from the pressure cylinder (7), characterized in that, It also includes a leak detection mechanism at the connection point and a pressure adjustment reference mechanism; The connection leakage detection mechanism includes a collar (501), which is disposed between the standard pressure gauge (3), the pressure gauge under test (4), and the connecting pipe (2). A hollow column (502) is fixedly connected to the outer surface of the collar (501), and an extension column (503) is slidably connected to the end of the hollow column (502) away from the collar (501). The connection leakage detection mechanism is used to detect the leakage at the connection of the connecting pipe (2) during the pressure application process to the standard pressure gauge (3) and the pressure gauge under test (4). The pressure adjustment reference mechanism is used to help staff understand the pressure values ​​that need to be manually adjusted.

2. The pressure gauge calibration device according to claim 1, characterized in that, A mounting bracket (504) is fixedly connected to the outer surface of the collar (501) near the extension post (503). An alarm light (505) is fixedly connected to the side of the mounting bracket (504) away from the extension post (503). A button (506) is fixedly connected to the side of the mounting bracket (504) near the extension post (503). The alarm light (505) and the button (506) are electrically connected.

3. The pressure gauge calibration device according to claim 2, characterized in that, Vertical plates (512) are provided on both sides of the connecting pipe (2). Sliding columns (516) are equidistantly connected to each vertical plate (512). A sealing ring (519) is fixedly connected to the side of the sliding column (516) near the connecting pipe (2). A rubber plate (520) is fixedly connected to the side of the sealing ring (519) near the connecting pipe (2).

4. The pressure gauge calibration device according to claim 3, characterized in that, The radius of the sealing ring (519) decreases from bottom to top. The bottommost sealing ring (519) is in contact with the upper end face of the collar (501). The sealing rings (519) are all in contact with each other. On one side of the sealing ring (519) near the collar (501), a sealing plate (522) is symmetrically fixedly connected. On the other side of the sealing ring (519) near the collar (501), a sealing groove (523) is symmetrically opened. The sealing plate (522) and the sealing groove (523) are interlocked with each other.

5. A pressure gauge calibration device according to claim 4, characterized in that, A disc (517) is fixedly connected to the outer surface of the sliding column (516) away from the sealing ring (519). A spring (518) is fixedly connected between the disc (517) and the vertical plate (512). The springs (518) are all sleeved on the outer surface of the sliding column (516).

6. A pressure gauge calibration device according to claim 5, characterized in that, Vertical grooves (513) are provided on each of the vertical plates (512). Slide plates (514) are slidably connected in each of the vertical grooves (513). Lifting blocks (510) are fixedly connected to the side of each slide plate (514) away from the vertical plate (512). A center plate (521) is fixedly connected between the two slide plates (514) at the center. The center plate (521) and the push plate (515) are both set as inclined surfaces on the side of the slide column (516). The slide column (516) is attached to the side wall of the center plate (521) and the push plate (515).

7. A pressure gauge calibration device according to claim 6, characterized in that, A lifting block (510) is fixedly connected to the side wall of the center plate (521). A linkage frame (511) is fixedly connected to both sides of the lifting block (510). The side of the linkage frame (511) away from the lifting block (510) is fixedly connected to the side wall of the push plate (515). A threaded rod (508) is threadedly connected through the center of the lifting block (510). A support block (507) is rotatably connected to the lower end of the threaded rod (508). The support block (507) is fixedly connected to the side wall of the calibration table (1). A knob (509) is fixedly connected to the upper end of the threaded rod (508).

8. A pressure gauge calibration device according to claim 1, characterized in that, The pressure adjustment reference mechanism includes a connecting ring (603) and a moving ring (605). The moving ring (605) is slidably connected to the outer surface of the pressure boosting fine-tuning valve (10). The connecting ring (603) is rotatably connected to the outer surface of the adjusting rod (9). A connecting frame (604) is symmetrically fixedly connected to the outer surface of the connecting ring (603). The end of the connecting frame (604) away from the connecting ring (603) is fixedly connected to the moving ring (605).

9. A pressure gauge calibration device according to claim 8, characterized in that, A horizontal plate (601) is provided above the moving ring (605). The horizontal plate (601) is fixedly connected to the side wall of the pressure cylinder (7). A through groove (608) is provided on the horizontal plate (601). A slider (606) is slidably connected in the through groove (608). The slider (606) is fixedly connected to the outer surface of the moving ring (605). A pointer (607) is fixedly connected to both sides of the slider (606). A scale bar (602) is fixedly connected symmetrically and equidistantly to the upper end face of the horizontal plate (601). The pointer (607) and the scale bar (602) correspond to each other.

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