A pressure gauge mechanical calibration stand

Abstract

This utility model discloses a mechanical calibration bench for pressure gauges, relating to the field of pressure gauge testing technology. It includes a bench body with a receiving cavity at its center. A gauge body is disposed inside the receiving cavity, and a flange is fixedly connected to the bottom of the gauge body. A clamping assembly is movably connected to the bench body, comprising clamping blocks that fit against the outer side of the flange. A linkage pressing assembly is movably connected to the bench body. This utility model, through the synergistic action of the clamping assembly and the linkage pressing assembly, enables rapid clamping and pressing of flanges of different sizes. The clamping assembly drives multiple clamping blocks to move radially synchronously via gears, gear rings, and sliders. The linkage pressing assembly drives the pressing blocks to press longitudinally via adjusting screws, moving plates, and synchronizing rods, thereby adapting to the installation requirements of pressure gauges of different specifications and effectively improving the versatility and practicality of the calibration bench.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauge detection, and specifically relates to a mechanical calibration table for pressure gauges. Background Art

[0002] A pressure gauge is a commonly used instrument for measuring fluid pressure and is widely used in industrial production, equipment detection, safety monitoring and other fields. Among them, the diaphragm pressure gauge has been widely used in precision measurement occasions due to its advantages such as compact structure, high sensitivity, and good vibration resistance. The detection of diaphragm pressure gauges usually requires the aid of special calibration equipment. By applying a standard pressure and observing indicators such as its indication error, hysteresis error, and linearity, to judge whether it meets the measurement accuracy requirements. To ensure the accuracy of the detection, the table body needs to be firmly installed and precisely positioned during the calibration process.

[0003] The patent document CN222912969U discloses a mechanical calibration table for pressure gauges, which relates to the technical field of pressure gauge calibration, and includes a bottom plate, a top plate, a scissor jack and a clamp; the top plate and the scissor jack are fixed on the bottom plate. The top plate has a "冂" - shaped structure, and a U - shaped groove is opened forward on its upper surface. The scissor jack is located inside the top plate. A clamp is detachably installed at the top of the scissor jack and is located below the U - shaped groove. A circular groove is opened in the clamp, and a diversion pipe is also provided in the clamp. One end of the diversion pipe is connected to the center of the circular groove, and the other end of the diversion pipe passes through the clamp and is connected to the pressure output end of the manual hydraulic cylinder; The advantages of the utility model: the flange of the diaphragm pressure gauge is clamped between the clamp and the top plate by the scissor jack, and then the manual hydraulic cylinder is used to pressurize the isolation diaphragm of the diaphragm pressure gauge through the diversion pipe to complete the calibration process. There is no pressure relief process during the whole process, so as to realize the calibration accuracy of the pressure gauge and avoid re - pressurizing and calibrating.

[0004] However, the above - mentioned patent can only perform pressure detection on diaphragm pressure gauges of a single size, and it is difficult to adapt to the size differences of flanges of pressure gauges of different specifications, resulting in insufficient clamping stability or limited application scope. In addition, during the calibration process, if the table body is not firmly fixed, it is easy to occur radial offset or longitudinal looseness, affecting the accuracy of pressure transmission and further reducing the reliability of the calibration results. For this reason, a mechanical calibration table for pressure gauges is needed to solve the existing deficiencies. Content of the Utility Model

[0005] Technical Problems to be Solved

[0006] There are certain limitations in the clamping and fixing structure of the existing mechanical calibration table for pressure gauges, which is difficult to adapt to the size differences of flange parts of pressure gauges of different specifications, and the table body is prone to looseness during the calibration process, affecting the accuracy of pressure transmission and the reliability of the calibration results.

[0007] Technical Solutions

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pressure gauge mechanical calibration bench, comprising a bench body, a receiving cavity constructed at the center of the bench body, a gauge body disposed inside the receiving cavity, and a flange fixedly connected to the bottom of the gauge body; a clamping assembly movably connected to the bench body, the clamping assembly comprising a clamping block, the clamping block fitting against the outer side of the flange; a linkage pressing assembly movably connected to the bench body, the linkage pressing assembly comprising a synchronizing rod and a pressing block, the pressing block fixedly connected to the top of the synchronizing rod, the synchronizing rod passing through the clamping block, and the synchronizing rod and the clamping block being movably connected; the pressing block fitting against the top of the flange.

[0009] Furthermore, a guide pipe is fixedly connected inside the platform body. One end of the guide pipe is connected to the port at the bottom of the platform body, and the other end of the guide pipe is connected to the pressurizer.

[0010] Furthermore, the clamping assembly also includes a connecting rod, a slider, a toothed ring, and a drive post. The toothed ring has several drive slots arranged in a circular array. The inner side of each drive slot is movably connected to a drive post. The top of each drive post is fixedly connected to a slider, and one side of the slider is fixedly connected to a connecting rod.

[0011] Furthermore, the clamping block, synchronizing rod, and pressure block are all arranged in a circular array. The end of the connecting rod away from the slider is fixedly connected to the back side of the clamping block. Several guide grooves are provided on the platform, and the guide grooves are arranged in a circular array. The sliders are slidably connected to the inside of the guide grooves.

[0012] Furthermore, the clamping assembly also includes a gear and a control screw. The gear is movably connected to the inside of the platform through a rotating shaft and meshes with a gear ring. The control screw is threadedly connected to the platform, and the bottom end of the control screw is movably engaged with the inside of the rotating shaft of the gear.

[0013] Furthermore, the linkage holding assembly also includes a moving plate, a moving block, and an adjusting screw. The moving plate has several moving slots arranged in a circular array. The moving slots are slidably connected to the interior of each moving slot. The top of each moving block is fixedly connected to the bottom of a synchronizing rod. The adjusting screw passes through the moving plate and is threadedly connected to the moving plate.

[0014] Furthermore, the platform body has an internal limiting cavity, the movable plate is slidably connected to the inside of the limiting cavity, and the adjusting screw is threadedly connected to the inside of the platform body.

[0015] Compared with existing technologies, this pressure gauge mechanical calibration stand has the following advantages:

[0016] I. This utility model achieves rapid clamping and pressing of flanges of different sizes through the synergistic action of the clamping assembly and the linkage pressing assembly. The clamping assembly drives multiple clamping blocks to move radially synchronously through structures such as gears, gear rings and sliders, while the linkage pressing assembly drives the pressing blocks to press longitudinally through structures such as adjusting screws, moving plates and synchronizing rods. This adapts to the installation requirements of pressure gauges of different specifications and effectively improves the versatility and practicality of the calibration bench.

[0017] II. This utility model combines the radial clamping of the outer side of the flange by the clamping assembly with the longitudinal pressing of the top of the flange by the linkage pressing assembly to form a double fixing effect. This can prevent the gauge body from radially shifting or longitudinally loosening during the pressure calibration process. At the same time, a rubber gasket can be added to the inner side of the clamping block to increase friction and further ensure the stability of the gauge body installation, providing a reliable guarantee for the accurate transmission of pressure during the mechanical calibration process of the pressure gauge.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the platform of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the platform body of this utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the toothed ring and the movable plate of this utility model.

[0023] In the diagram: 1. Platform; 2. Receiving cavity; 3. Surface body; 4. Flange; 5. Clamping assembly; 501. Clamping block; 502. Connecting rod; 503. Slider; 504. Gear ring; 505. Drive column; 506. Gear; 507. Control screw; 6. Linkage pressing assembly; 601. Synchronizing rod; 602. Pressing block; 603. Moving plate; 604. Moving block; 605. Adjusting screw; 7. Guide pipe; 8. Drive groove; 9. Guide groove; 10. Moving groove; 11. Limiting cavity. Detailed Implementation

[0024] 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.

[0025] Example 1:

[0026] like Figure 1-4 As shown, this utility model provides a technical solution: a pressure gauge mechanical calibration bench, including a bench body 1, a receiving cavity 2 constructed at the center of the bench body 1, a gauge body 3 disposed inside the receiving cavity 2, and a flange portion 4 fixedly connected to the bottom of the gauge body 3, a clamping assembly 5 movably connected to the bench body 1, the clamping assembly 5 including a clamping block 501, the clamping block 501 fitting against the outside of the flange portion 4, a linkage pressure holding assembly 6 movably connected to the bench body 1, the linkage pressure holding assembly 6 including a synchronizing rod 601 and a pressure block 602, the pressure block 602 fixedly connected to the top of the synchronizing rod 601, the synchronizing rod 601 passing through the clamping block 501, and the synchronizing rod 601 and the clamping block 501 being movably connected, the pressure block 602 fitting against the top of the flange portion 4, a guide pipe 7 fixedly connected inside the bench body 1, one end of the guide pipe 7 being connected to the port at the bottom of the gauge body 3, and the other end of the guide pipe 7 being connected to a pressurizing machine.

[0027] First, place the flange 4 at the bottom of the gauge body 3 in the center of the receiving cavity 2, and fit the opening at the bottom of the gauge body 3 onto the outside of the port of the guide tube 7. Then, use the clamping assembly 5 to restrict the position of the outer side of the flange 4. Then, use the linkage pressing assembly 6 to press and tighten the flange 4 from top to bottom. Use the pressurizer to control the movement of oil inside the guide tube 7, thereby pressurizing the isolation diaphragm of the gauge body 3, causing the pressure of the gauge body 3 to change. When the reading on the gauge body 3 is the same as the reading on the pressure gauge on the pressurizer, the pressure test of the gauge body 3 is completed.

[0028] Example 2:

[0029] like Figure 1 , Figure 3 and Figure 4As shown, the clamping assembly 5 also includes a connecting rod 502, a slider 503, a toothed ring 504, and a drive post 505. The toothed ring 504 has several drive grooves 8 arranged in a circular array. Each drive groove 8 is movably connected to a drive post 505. A slider 503 is fixedly connected to the top of the drive post 505, and a connecting rod 502 is fixedly connected to one side of the slider 503. The clamping block 501, the synchronizing rod 601, and the pressure block 602 are all arranged in a circular array. The end of the connecting rod 502 furthest from the slider 503 is connected to the clamping block 502. The back side of the platform 1 is fixedly connected. Several guide grooves 9 are provided on the platform 1. The guide grooves 9 are arranged in a circular array. The sliders 503 are slidably connected to the inside of the guide grooves 9. The clamping assembly 5 also includes a gear 506 and a control screw 507. The gear 506 is movably connected to the inside of the platform 1 through a rotating shaft, and the gear 506 meshes with the gear ring 504. The control screw 507 is threadedly connected to the platform 1, and the bottom end of the control screw 507 is movably engaged with the inside of the rotating shaft of the gear 506. In this embodiment, there are four sliders 503.

[0030] The control screw 507 is rotated. In this embodiment, the bottom of the control screw 507 is square and it is movably engaged with the shaft of the gear 506, so that the control screw 507 can control the gear 506 to rotate synchronously during the downward rotation, and the gear 506 can maintain the current angle when the control screw 507 stops rotating.

[0031] Gear 506 drives gear ring 504 to rotate, causing drive groove 8 on it to rotate synchronously, thereby controlling drive column 505 to move along drive groove 8. The slider 503 at the top of drive column 505 can only slide along guide groove 9, so that the four sliders 503 move closer to each other along guide groove 9. Under the action of connecting rod 502, clamping blocks 501 move closer to each other until they clamp the outer side of flange 4, which is beneficial for clamping flanges 4 at different times and improves the practicality of the calibration table.

[0032] In addition, a rubber gasket can be installed on the inside of the clamping block 501 to increase the friction between the clamping block 501 and the flange 4, thereby improving the clamping stability.

[0033] Example 3:

[0034] like Figure 1 , Figure 3 and Figure 4As shown, the linkage holding assembly 6 also includes a movable plate 603, a movable block 604, and an adjusting screw 605. The movable plate 603 has several movable slots 10, which are arranged in a circular array. The movable blocks 604 are slidably connected inside each movable slot 10. The top of each movable block 604 is fixedly connected to the bottom of the synchronizing rod 601. The adjusting screw 605 passes through the movable plate 603 and is threadedly connected to the movable plate 603. The platform 1 has a limiting cavity 11 inside, and the movable plate 603 is slidably connected inside the limiting cavity 11. The adjusting screw 605 is threadedly connected to the inside of the platform 1.

[0035] As the clamping blocks 501 approach each other, the synchronizing rod 601 and the clamping block 501 move in sync, causing the synchronizing rod 601 and the pressing block 602 to move synchronously, so that the moving block 604 at its bottom slides synchronously along the moving groove 10.

[0036] By rotating the adjusting screw 605, since the adjusting screw 605 is threadedly connected to the moving plate 603, the limiting cavity 11 restricts the longitudinal movement of the moving plate 603, thereby controlling the moving plate 603 to move downward. Since the moving block 604 is in movable cooperation with the moving groove 10, the synchronizing rod 601 moves downward synchronously, causing the pressure block 602 to move downward until the flange 4 is pressed and tightened, preventing it from shifting its longitudinal position. This is suitable for different flange thicknesses and further improves the stability of the body 3.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical pressure gauge calibration stand comprising a stand body (1), characterised in that: The platform (1) has a receiving cavity (2) at its center. A watch body (3) is provided inside the receiving cavity (2), and a flange (4) is fixedly connected to the bottom of the watch body (3). A clamping assembly (5) is movably connected to the platform (1). The clamping assembly (5) includes a clamping block (501), which fits against the outside of the flange (4). A linkage pressing assembly (6) is movably connected to the platform (1). The linkage pressing assembly (6) includes a synchronizing rod (601) and a pressing block (602). The pressing block (602) is fixedly connected to the top of the synchronizing rod (601). The synchronizing rod (601) passes through the clamping block (501), and the synchronizing rod (601) is movably connected to the clamping block (501). The pressing block (602) fits against the top of the flange (4).

2. A pressure gauge mechanical proving bench according to claim 1, characterized in that: The platform (1) is fixedly connected to a guide pipe (7). One end of the guide pipe (7) is connected to the port at the bottom of the table body (3), and the other end of the guide pipe (7) is connected to the outlet end of the pressurizer.

3. A pressure gauge mechanical proving bench according to claim 1, characterized in that: The clamping assembly (5) further includes a connecting rod (502), a slider (503), a toothed ring (504), and a drive post (505). The toothed ring (504) has several drive grooves (8) arranged in a circular array. The drive grooves (8) are movably connected to the inner side of each drive groove (8). The top of the drive post (505) is fixedly connected to the slider (503), and the connecting rod (502) is fixedly connected to one side of the slider (503).

4. A pressure gauge mechanical proving bench according to claim 3, characterised in that: The clamping block (501), the synchronizing rod (601), and the pressure block (602) are all arranged in a circular array. The end of the connecting rod (502) away from the slider (503) is fixedly connected to the back side of the clamping block (501). Several guide grooves (9) are provided on the platform (1). The guide grooves (9) are arranged in a circular array. The sliders (503) are slidably connected to the inside of the guide grooves (9).

5. A pressure gauge mechanical proving bench according to claim 4, characterised in that: The clamping assembly (5) further includes a gear (506) and a control screw (507). The gear (506) is movably connected to the inside of the platform (1) via a rotating shaft, and the gear (506) meshes with a gear ring (504). The control screw (507) is threadedly connected to the platform (1), and the bottom end of the control screw (507) is movably engaged with the inside of the rotating shaft of the gear (506).

6. A pressure gauge mechanical proving bench according to claim 1, characterized in that: The linkage holding assembly (6) further includes a moving plate (603), a moving block (604), and an adjusting screw (605). The moving plate (603) has several moving slots (10) arranged in a circular array. The moving slots (10) are slidably connected to the inside of each moving slot (10). The top of each moving block (604) is fixedly connected to the bottom of the synchronizing rod (601). The adjusting screw (605) passes through the moving plate (603) and is threadedly connected to the moving plate (603).

7. A pressure gauge mechanical proving bench according to claim 6, characterised in that: The platform (1) has a limiting cavity (11) inside, the moving plate (603) is slidably connected to the inside of the limiting cavity (11), and the adjusting screw (605) is threadedly connected to the inside of the platform (1).

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