Diaphragm pressure gauge rapid calibrating device and calibrating method

Abstract

The invention relates to an improvement of a diaphragm pressure gauge verification mode, in particular to a diaphragm pressure gauge rapid verification device and a verification method, which can realize rapid clamping of a compatible sanitary diaphragm pressure gauge and a flange type diaphragm pressure gauge through pressing operation, and is assisted by corresponding pipeline and valve body design. The diaphragm pressure gauge calibration device comprises a base and supports, the supports are installed on the two sides of the base, lead screws are arranged on the lower portions of the supports, the diaphragm pressure gauge calibration device further comprises a first sliding block and a second sliding block, and the first sliding block is in threaded connection with the lead screws and is in sliding fit with the base; the sliding block II abuts against the sliding block I, the contact surface between the sliding block II and the sliding block I is wedge-shaped, the supporting plate is rotationally matched with the support, one end of the supporting plate is rotationally matched with the sliding block II, pressing blocks are arranged on the two sides of the other end of the supporting plate respectively, and the pressing blocks are located above the clamping part of the base. A plurality of concentric sealing rings are arranged on the clamping part, an air inlet is formed in the center of the clamping part, and an air inlet is formed in the clamping part.

Description

Technical Field

[0001] The present invention relates to an improvement in the verification method of diaphragm pressure gauges, and specifically to a rapid verification device and verification method for diaphragm pressure gauges. Background Art

[0002] A diaphragm pressure gauge is a pressure gauge composed of a diaphragm and a general-purpose pressure gauge, generally applicable to the detection scenarios of strongly corrosive, high-temperature, and high-viscosity liquids. It is mainly to prevent the measured medium from directly entering the inner cavity of the general-purpose pressure gauge and thus causing pollution of the inner cavity of the pressure gauge. The application scenarios of diaphragm pressure gauges are relatively wide, mainly used in production environments such as petrochemical, soda making, chemical fiber combustion, and pharmaceutical food, etc., for measuring the pressure of fluid media. Currently, as a common pressure gauge, the diaphragm pressure gauge also belongs to the list of pressure gauges subject to mandatory verification in our country.

[0003] Currently, for the verification of diaphragm pressure gauges, the main difficulty lies in the clamping of diaphragm pressure gauges. Since diaphragm pressure gauges do not have threaded ports and cannot be screwed to the joints of existing pressure gauge verification devices, generally, an external fixture with an external pressure source is added for the clamping of diaphragm pressure gauges in the prior art. By placing the diaphragm pressure gauge at the verification joint of the pressure gauge verification device and then pressing the base of the diaphragm pressure gauge through this fixture. Generally speaking, it is to tightly press the diaphragm pressure gauge against the verification joint of the pressure gauge verification device with the fixture. The pressure provided by the fixture needs to be greater than the verification pressure of the pressure gauge verification device to ensure that the diaphragm pressure gauge can be firmly installed on the pressure gauge verification device. However, such a design mainly has the following disadvantages. On the one hand, the fixture requires an external pressure source to provide pressure. On the other hand, due to the fixture requiring mechanisms such as air circuits, air sources, and corresponding valve bodies, the volume is relatively large and the operation is inconvenient.

[0004] Furthermore, diaphragm pressure gauges include hygienic diaphragm pressure gauges and flanged diaphragm pressure gauges. The hygienic diaphragm pressure gauge not only has a smaller cross-sectional area of the base and a sloping surface, while the flange of the flanged diaphragm pressure gauge is larger. Both have problems in clamping, and there is no verification device that can be compatible with both types of diaphragm pressure gauges.

[0005] In summary, the current rapid clamping and verification methods for diaphragm pressure gauges in the prior art still need to be improved. How to achieve rapid clamping and disassembly compatible with both types of diaphragm pressure gauges and thus effectively improve the verification efficiency of diaphragm pressure gauges is a technical problem to be solved. Summary of the Invention

[0006] The purpose of the present invention is to provide a rapid verification device and verification method for diaphragm pressure gauges, which can effectively achieve rapid clamping compatible with hygienic diaphragm pressure gauges and flanged diaphragm pressure gauges through pressing operations, and then supplemented by corresponding pipeline and valve body designs, so as to realize the verification operations for both types of diaphragm pressure gauges.

[0007] To achieve the above object, the present invention provides the following technical solutions: A rapid verification device for a diaphragm pressure gauge, including a base and a bracket. The bracket is installed on both sides of the base. The bracket is provided with a lead screw, and also includes a first slider and a second slider. The first slider is screwed with the lead screw and is slidably matched with the base; the second slider abuts against the first slider and the contact surface is wedge-shaped. It also includes a support plate, which is rotatably matched with the bracket. One end of the support plate is rotatably matched with the second slider, and the two sides of the other end are respectively provided with pressing blocks. The pressing blocks are located above the clamping part of the base. There are a plurality of concentric sealing rings on the clamping part, and an air inlet is provided at the center of the clamping part. A pressure increasing valve and a pressure relief valve are respectively provided on both sides of the base, and the air inlet is respectively communicated with the pressure increasing valve and the pressure relief valve.

[0008] Preferably, it further includes a pressing head, which is detachably connected to the pressing block and is located between the two pressing blocks.

[0009] Preferably, the air inlet is also communicated with a standard gauge, and the standard gauge is installed on the base.

[0010] Preferably, the shape of the second slider is an inverted triangle and abuts against the wedge-shaped surface of the first slider respectively.

[0011] Preferably, a rotating end is provided on one side of the lead screw passing through the bracket, and the rotating end can be rotationally matched through a ratchet handle.

[0012] Preferably, the support plate and the pressing block are rotationally matched.

[0013] Preferably, it further includes a limiting component, which includes a stop block, a disc member, a connecting rod and an adjusting rod. A strip-shaped groove is provided on the base, and the strip-shaped groove is located on both sides of the clamping part. The stop block is slidably matched with the strip-shaped groove. One end of the connecting rod is rotationally matched with the stop block, and the other end is rotationally matched with the disc member. The disc member is located at the bottom of the base and is also rotationally matched with the adjusting rod.

[0014] Preferably, it further includes a cushion block with an air inlet hole. The diaphragm pressure gauge can be placed on the clamping part through the cushion block and is communicated with the air inlet.

[0015] To achieve the above object, the present invention provides the following technical solutions: A rapid verification method for a diaphragm pressure gauge, including the following steps:

[0016] Step 1, determine whether the diaphragm pressure gauge is a hygienic diaphragm pressure gauge or a flanged diaphragm pressure gauge;

[0017] If it is a flanged diaphragm pressure gauge, place the flanged diaphragm pressure gauge on the base with the bottom of the flanged diaphragm pressure gauge facing the clamping part of the base, so that the bottom of the flanged diaphragm pressure gauge contacts the sealing ring at the clamping part;

[0018] If it is a hygienic diaphragm pressure gauge, install the spacer block above the clamping part so that the bottom of the spacer block contacts the sealing ring at the clamping part, and directly install the hygienic diaphragm pressure gauge on the spacer block so that the air inlet hole of the spacer block contacts the bottom of the hygienic diaphragm pressure gauge;

[0019] Step 2: Toggle the adjusting rod, drive the connecting rod through the disc member and then drive the stopper, so that the stoppers on both sides move synchronously towards the center position, thereby limiting the part to be clamped;

[0020] Step 3: Adjust the rotating end through the ratchet handle to drive the lead screw to rotate, so that slider one moves closer to the middle position, thereby driving slider two to move upward. The support plate on one side of slider two tilts upward, and the support plate on the side of the pressing block moves downward;

[0021] Step 4: As the ratchet handle moves, the pressing block presses the flange of the flanged diaphragm pressure gauge or the pressing head presses the arc surface of the hygienic diaphragm pressure gauge, keeping the air inlet of the clamping part sealed with the diaphragm of the diaphragm pressure gauge;

[0022] Step 5: Inlet air through the pressure increasing valve. The pressure increasing valve increases the pressure to the specified pressure according to the requirements of the verification regulation, determines by the pressure value shown on the standard gauge, and then determines whether the diaphragm pressure gauge is qualified by the error between the pressure value shown on the diaphragm pressure gauge and the pressure value shown on the standard gauge;

[0023] Step 6: After completing the pressure increasing process of the diaphragm pressure gauge, then complete the pressure relief stage by adjusting the pressure relief valve, and verify the error of the diaphragm pressure gauge during the pressure relief process;

[0024] Step 7: When the pressure relief valve is completely relieved of pressure, then adjust the rotating end through the ratchet wrench to drive the lead screw to rotate, so that slider one moves closer to the edge position, thereby driving slider two to move downward. The support plate on one side of slider two moves downward, and the support plate on the side of the pressing block moves upward, thereby forming a space for the diaphragm pressure gauge to be detached from the base;

[0025] Step 8: Then drive the stoppers on both sides of the diaphragm pressure gauge to move away from each other by toggling the adjusting rod through the disc member, thereby removing the diaphragm pressure gauge.

[0026] Preferably, if it is a flanged diaphragm pressure gauge, the part to be clamped is the flanged diaphragm pressure gauge; if it is a hygienic diaphragm pressure gauge, the part to be clamped is the spacer block.

[0027] The rapid verification device and verification method for diaphragm pressure gauges of the present invention have the following advantages: The rapid clamping and disassembly of the diaphragm pressure gauge can be completed through manual pressing operation. And when the air pressure value during the verification process of the diaphragm pressure gauge is relatively large, the cooperation mode between the slider one and the slider two driven by the screw rod driven by the ratchet can still provide a stable downward pressure on the support plate, thereby ensuring the stability of the diaphragm pressure gauge during the verification process. Through the design of the cushion block and the pressing head, it can adapt to sanitary diaphragm pressure gauges and flange diaphragm pressure gauges of different sizes and different heights, thereby enabling a rapid verification device for diaphragm pressure gauges to be compatible with different types of diaphragm pressure gauges and simplifying the clamping of the diaphragm pressure gauge. Moreover, the structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural view of the rapid verification device for diaphragm pressure gauges of the present invention Figure 1 ;

[0029] Figure 2 is a schematic structural view of clamping a flange diaphragm pressure gauge of the present invention;

[0030] Figure 3 is a schematic structural view of clamping a sanitary diaphragm pressure gauge of the present invention;

[0031] Figure 4 is a schematic structural view of the rapid verification device for diaphragm pressure gauges of the present invention Figure 2

[0032] Figure 5 is a partial schematic structural view of the rapid verification device for diaphragm pressure gauges of the present invention.

[0033] Reference numerals: 1, base; 2, bracket; 3, screw rod; 4, slider one; 5, slider two; 6, support plate; 8, pressing block; 9, stop block; 10, clamping part; 11, air inlet; 12, pressure increasing valve; 13, pressure relief valve; 14, standard gauge; 15, rotating end; 16, disc member; 17, connecting rod; 18, adjusting rod; 19, strip-shaped groove; 20, diaphragm pressure gauge; 21, pressing head; 22, cushion block; 23, ratchet handle; 23, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The rapid verification device for diaphragm pressure gauges of the present invention includes a base 1 and a bracket 2. The bracket 2 is installed on both sides of the base 1. A lead screw 3 is provided at the lower part of the bracket 2. It also includes a first slider 4 and a second slider 5. The first slider 4 is screwed with the lead screw 3 and is slidably matched with the base 1. The second slider 5 abuts against the first slider 4, and the contact surface between the second slider 5 and the first slider 4 is wedge-shaped. It further includes a support plate 6. The support plate 6 is rotatably matched with the bracket 2. One end of the support plate 6 is rotatably matched with the second slider 5. At both sides of the other end of the support plate 6, there are respectively pressure blocks 8. The pressure blocks 8 are located above the clamping part 10 of the base 1. An air inlet 11 is provided at the clamping part 10. On both sides of the base 1, there are respectively a booster valve 12 and a pressure relief valve 13. The air inlet 11 is communicated with the booster valve 12 and the pressure relief valve 13 respectively. There is a gap between the pressure block 8 on the support plate 6 and the base of the diaphragm pressure gauge 20. The diaphragm pressure gauge 20 to be inspected is placed on the clamping part 10 through this gap. The gap between the two pressure blocks 8 may be larger than the diameter of the hygienic diaphragm pressure gauge. Therefore, a pressure head 21 can be added. The pressure head 21 can be a spherical structure made of rubber. The pressure head 21 is detachably connected to the pressure block 8 and is located between the two pressure blocks 8. Generally, it can be directly screwed to the side of the pressure block 8 and the number is four, which are respectively pressed against the arc-shaped surface of the hygienic diaphragm pressure gauge to ensure uniform force on the hygienic diaphragm pressure gauge. The air inlet 11 is also communicated with a standard gauge 14. The standard gauge 14 is installed on the base 1. By comparing the readings of the standard gauge 14 and the diaphragm pressure gauge 20, the error of the diaphragm pressure gauge to be inspected can be judged.

[0036] The shape of the second slider 5 is an inverted triangle and it abuts against the wedge-shaped surface of the first slider 4.

[0037] On one side of the bracket 2 through which the lead screw 3 passes, there is a rotating end 15. The rotating end 15 can be rotationally matched through a ratchet handle.

[0038] The support plate 6 and the pressure block 8 are rotationally matched.

[0039] It further includes a limit component. The limit component includes a stop block 9, a disc member 16, a connecting rod 17 and an adjusting rod 18. A strip-shaped groove 19 is provided on the base 1. The strip-shaped groove 19 is located on both sides of the clamping part 10. The stop block 9 is slidably matched with the strip-shaped groove 19. One end of the connecting rod 17 is rotationally matched with the stop block 9, and the other end is rotationally matched with the disc member 16. The disc member 16 is located at the bottom of the base 1 and is also rotationally matched with the adjusting rod 18.

[0040] It further includes a cushion block 22 with an air inlet hole. The diaphragm pressure gauge 20 can be placed on the clamping part 10 through the cushion block 22 and is communicated with the air inlet 11. It is judged whether the cushion block 22 is needed during the verification process according to whether the pressure block 8 can tightly press the bases of the hygienic diaphragm pressure gauge and the flanged diaphragm pressure gauge when it descends to the lowest position.

[0041] In specific calibration, the following steps are included:

[0042] A rapid calibration method for a diaphragm pressure gauge, characterized in that it includes the following steps:

[0043] Step 1, determine whether the diaphragm pressure gauge 20 is a hygienic diaphragm pressure gauge or a flanged diaphragm pressure gauge;

[0044] If it is a flanged diaphragm pressure gauge, place the flanged diaphragm pressure gauge on the base 1 with the bottom of the flanged diaphragm pressure gauge facing the clamping part 10 of the base 1, so that the bottom of the flanged diaphragm pressure gauge contacts the sealing ring 23 of the clamping part 10;

[0045] If it is a hygienic diaphragm pressure gauge, install the spacer block 22 above the clamping part 10, so that the bottom of the spacer block 22 contacts the sealing ring 23 at the clamping part 10, and directly install the hygienic diaphragm pressure gauge on the spacer block 22, so that the air inlet hole of the spacer block 22 contacts the bottom of the hygienic diaphragm pressure gauge;

[0046] Step 2, toggle the adjusting rod 18, drive the connecting rod 17 through the disc member 16 and then drive the stop block 9, so that the two stop blocks 9 move synchronously towards the center position, thereby limiting the part to be clamped;

[0047] Step 3, adjust the rotating end 15 through the ratchet handle to drive the lead screw 3 to rotate, so that the first slider 4 moves towards the middle position, thereby driving the second slider 5 to move upward. The support plate 6 on one side of the second slider 5 tilts upward, and the support plate 6 on the side of the pressing block 8 moves downward;

[0048] Step 4, as the ratchet handle moves, the pressing block 8 presses the flange of the flanged diaphragm pressure gauge or the pressing head 21 presses the arc surface of the hygienic diaphragm pressure gauge, and keep the air inlet 11 of the clamping part 10 sealed with the diaphragm of the diaphragm pressure gauge 20;

[0049] Step 5, introduce air through the pressure increasing valve 12. The pressure increasing valve 12 increases the pressure to the specified pressure according to the requirements of the calibration regulation, judge through the displayed pressure value of the standard gauge 14, and then judge whether the diaphragm pressure gauge 20 is qualified according to the error between the displayed pressure of the diaphragm pressure gauge and the displayed pressure value of the standard gauge 14;

[0050] Step 6, after completing the pressure increasing process of the diaphragm pressure gauge, then complete the pressure relief stage by adjusting the pressure relief valve 13, and calibrate the error of the diaphragm pressure gauge 20 during the pressure relief process;

[0051] Step 7, when the pressure relief valve 13 is completely depressurized, the rotating end 15 is adjusted by the ratchet wrench to drive the screw 3 to rotate, so that the slider 1 4 approaches the edge position, and then drives the slider 2 5 to move downward, the support plate 6 is located on one side of the slider 2 5 downward, and the support plate 6 is located on one side of the pressure block 8 and moves upward, thereby forming a space for the diaphragm pressure gauge 20 to be detached from the base 1;

[0052] Step eight, the adjusting rod 18 is moved to drive the connecting rod 17 through the disc member 16, thereby driving the blocks 9 on both sides of the diaphragm pressure gauge 20 to move away from both sides, and then the diaphragm pressure gauge 20 is removed.

[0053] If it is a flange type diaphragm pressure gauge, the part to be clamped is the flange type diaphragm pressure gauge; if it is a sanitary diaphragm pressure gauge, the part to be clamped is the cushion block 22.

[0054] The pressing block 8 is located above the base of the diaphragm pressure gauge. There are two pressing blocks 8 which are symmetrically arranged. The base of the diaphragm pressure gauge is clamped and pressed by the pressing blocks 8 .

[0055] Since the connection between the screw rod 3 and the bracket 2 is provided with a rotating end 15, when the ratchet handle 23 is turned, the screw rod 3 is in a one-way rotation mode. When the screw rod rotates, the slider 1 4 will move toward the center, so when the slider 1 4 moves toward the center, it will push the slider 2 5 to move upward. The slider 2 5 is in rotational cooperation with one end of the support plate 6. Through the upward movement of the slider 2 5, one side of the support plate 6 is tilted upward. Due to the rotational cooperation between the support plate 6 and the bracket 2, when one side of the support plate 6 is lifted, the other side of the support plate 6 is pressed downward, so that the support plate 6 drives the pressure block 8 to firmly press the diaphragm pressure gauge on the clamping part 10 of the base 1.

[0056] When the diaphragm pressure gauge is in the calibration process, the air pressure of the air inlet 11 exerts pressure on the diaphragm pressure gauge 20, which will act on the support plate 6, the slider 2 5, the slider 1 4 and the thread between the slider 1 4 and the screw rod 3, so that the position between the slider 1 4 and the slider 2 5 can be very stable and will not be displaced.

[0057] For the verification of diaphragm pressure gauges, the diaphragm pressure gauge under test remains stably clamped under large pressure conditions. Only after turning the rotating end 15 by the ratchet handle 23 can the lead screw 3 be rotated, and then the positions of the first slider 4 and the second slider 5 can be adjusted; such a design can make the connection of the diaphragm pressure gauge very stable. After the diaphragm pressure gauge is verified, it is unlocked by the ratchet handle 23, and the lead screw 3 is adjusted by the ratchet handle, so that the first slider 4 drives the second slider 5 to descend, driving the support plate 6 on one side of the second slider 5 to start descending, so that the support plate 6 on one side of the diaphragm pressure gauge starts to lift, creating a gap between the pressure block 8 and the diaphragm pressure gauge, facilitating the removal of the diaphragm pressure gauge from the verification joint of the pressure gauge verification equipment. Such a design only requires a person to press the ratchet handle 23 to complete the quick clamping of the diaphragm pressure gauge.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid calibration device for a diaphragm pressure gauge, characterized in that: The invention comprises a base (1) and a bracket (2), wherein the bracket (2) is mounted on both sides of the base (1), the bracket (2) is provided with a screw rod (3), and further comprises a slider (4) and a slider (5), wherein the slider (4) is screwed to the screw rod (3) and is slidably matched with the base (1); the slider (5) and the slider (4) are abutted against each other and the contact surface is wedge-shaped, and further comprises a support plate (6), wherein the support plate (6) is rotatably matched with the bracket (2), and one end of the support plate (6) is rotatably matched with the slider. The two blocks (5) are rotatably matched with each other, and pressure blocks (8) are respectively provided on both sides of the other end. The pressure blocks (8) are located above the clamping part (10) of the base (1), and a plurality of concentric sealing rings (23) are provided on the clamping part (10). An air inlet (11) is provided at the center of the clamping part (10). A boost valve (12) and a pressure relief valve (13) are respectively provided on both sides of the base (1), and the air inlet (11) is respectively connected to the boost valve (12) and the pressure relief valve (13).

2. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: It also comprises a pressure head (21), wherein the pressure head (21) is detachably connected to the pressure blocks (8) and the pressure head (21) is located between the two pressure blocks (8).

3. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: The air inlet (11) is also in communication with a standard meter (14), and the standard meter (14) is mounted on the base (1).

4. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: The shape of the slider 2 (5) is an inverted triangle and is respectively against the wedge-shaped surface of the slider 1 (4).

5. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: The screw rod (3) is provided with a rotating end (15) on one side passing through the bracket (2), and the rotating end (15) can be rotated and matched by a ratchet handle.

6. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: The support plate (6) can be rotationally matched with the pressing block (8).

7. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: The invention also comprises a limit assembly, which comprises a stopper (9), a disc (16), a connecting rod (17) and an adjusting rod (18); a strip groove (19) is provided on the base (1); the strip groove (19) is located on both sides of the clamping part (10); the stopper (9) and the strip groove (19) are slidably matched; one end of the connecting rod (17) is rotationally matched with the stopper (9); and the other end is rotationally matched with the disc (16); the disc (16) is located at the bottom of the base (1) and is also rotationally matched with the adjusting rod (18).

8. The diaphragm pressure gauge rapid calibration device according to claim 1, characterized in that: It also includes a cushion block (22) with an air inlet hole, and the diaphragm pressure gauge (20) can be placed on the clamping part (10) through the cushion block (22) and communicated with the air inlet (11).

9. A rapid calibration method for a diaphragm pressure gauge, characterized in that: The steps include: Step 1, determining whether the diaphragm pressure gauge (20) is a sanitary diaphragm pressure gauge or a flange diaphragm pressure gauge; If it is a flange type diaphragm pressure gauge, place the flange type diaphragm pressure gauge on the base (1) with the bottom of the flange type diaphragm pressure gauge facing the clamping part (10) of the base (1), so that the bottom of the flange type diaphragm pressure gauge contacts the sealing ring (23) of the clamping part (10); If it is a sanitary diaphragm pressure gauge, the cushion block (22) is installed above the clamping portion (10) so that the bottom of the cushion block (22) contacts the sealing ring (23) at the clamping portion (10), and the sanitary diaphragm pressure gauge is directly installed on the cushion block (22) so that the air inlet hole of the cushion block (22) contacts the bottom of the sanitary diaphragm pressure gauge; Step 2: Move the adjusting rod (18), drive the connecting rod (17) through the disc (16), and then drive the stopper (9), so that the stoppers (9) on both sides move toward the center position synchronously, thereby limiting the position of the clamping part; Step 3: The ratchet handle is used to adjust the rotating end (15) to drive the screw rod (3) to rotate, so that the slider 1 (4) moves closer to the middle position, thereby driving the slider 2 (5) to move upward, and the support plate (6) located on one side of the slider 2 (5) tilts upward, and the support plate (6) located on one side of the pressure block (8) moves downward; Step 4: As the ratchet handle moves, the pressure block (8) presses the flange of the flange-type diaphragm pressure gauge or the pressure head (21) presses the curved surface of the sanitary diaphragm pressure gauge, so as to maintain a seal between the air inlet (11) of the clamping part (10) and the diaphragm of the diaphragm pressure gauge (20); Step 5, air is introduced through the booster valve (12), the booster valve (12) boosts the pressure to a specified pressure according to the requirements of the verification regulations, and the pressure value indicated by the standard gauge (14) is used for determination, and then the error between the indicated pressure of the diaphragm pressure gauge and the indicated pressure value of the standard gauge (14) is used to determine whether the diaphragm pressure gauge (20) is qualified; Step 6, after the pressurization process of the diaphragm pressure gauge is completed, the pressure relief stage is completed by adjusting the pressure relief valve (13), and the error of the diaphragm pressure gauge (20) is verified during the pressure relief process; Step 7, when the pressure relief valve (13) is completely depressurized, the rotating end (15) is adjusted by the ratchet wrench to drive the screw (3) to rotate, so that the slider 1 (4) approaches the edge position, thereby driving the slider 2 (5) to move downward, the support plate (6) located on one side of the slider 2 (5) moves downward, and the support plate (6) located on one side of the pressure block (8) moves upward, thereby forming a space for the diaphragm pressure gauge (20) to be detached from the base (1); Step eight, the adjusting rod (18) is moved to drive the connecting rod (17) through the disc member (16), thereby driving the stoppers (9) on both sides of the diaphragm pressure gauge (20) to move away from both sides, and then the diaphragm pressure gauge (20) is removed.

10. The rapid verification method for a diaphragm pressure gauge according to claim 9, characterized in that: If it is a flange type diaphragm pressure gauge, the part to be clamped is the flange type diaphragm pressure gauge; if it is a sanitary diaphragm pressure gauge, the part to be clamped is the cushion block (22).

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