Stepped pressure gauge calibration table

Abstract

The utility model provides a stepped pressure gauge calibration table, and relates to the technical field of calibration equipment. The stepped pressure gauge calibration table comprises a calibration table body. The verification table body comprises a first supporting plate and a second supporting plate which are oppositely arranged, and a plurality of steps which are located between the first supporting plate and the second supporting plate and are arranged in a step shape; each step is internally provided with an air channel extending in the length direction of the step, and the upper surface of each step is provided with a plurality of meter position pieces communicating with the air channels. Wherein the air path in one step is used for being communicated with an external air source and atmosphere fluid, and the air paths in the other steps are all communicated with the air path of the step through fluid of the first supporting plate. The stepped pressure gauge calibration bench provided by the utility model solves the technical problems that a multi-path pressure gauge calibration bench in the prior art is inconvenient to read the pressure gauge to be calibrated and is easy to leak air.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration equipment, in particular to a stepped pressure gauge calibration platform. Background Art

[0002] The pressure gauge calibration bench is a device that works with the pressure standard to complete the inspection and calibration work. The existing pressure gauge calibration bench includes a multi-channel pressure gauge calibration bench, which is connected in series with stainless steel pipes, and there is a risk of air leakage at the connection; and when the number of gauges exceeds 5, the calibration bench is large in size and occupies a large space, and the multiple pressure gauges to be inspected installed on the calibration bench will block each other, affecting the operator's reading of the pressure gauges to be inspected. Utility Model Content

[0003] The utility model aims to provide a stepped pressure gauge calibration platform to alleviate the technical problems existing in the prior art that the multi-channel pressure gauge calibration platform is inconvenient to read the pressure gauge to be inspected and is prone to air leakage.

[0004] In order to solve the above technical problems, the technical effects that can be achieved by the utility model are analyzed as follows:

[0005] The utility model provides a stepped pressure gauge calibration platform, which includes a calibration platform body;

[0006] The inspection platform body comprises a first support plate and a second support plate which are arranged opposite to each other, and a plurality of steps arranged in a ladder shape between the first support plate and the second support plate;

[0007] Each of the steps is provided with an air path extending along the length direction of the step, and a plurality of position measuring parts communicating with the air path are installed on the upper surface;

[0008] The air path in one of the steps is used to communicate with an external air source and atmospheric fluid, and the air paths in the other steps are all connected to the air path of the step through the first support plate fluid.

[0009] Furthermore, the plurality of steps include a first step, a second step and a third step, the first step is provided with a first gas path, and the first gas path is used to communicate with an external gas source and atmospheric fluid;

[0010] The second gas path of the second step is in fluid communication with the first gas path;

[0011] The third gas path of the third step is in fluid communication with the first gas path.

[0012] Furthermore, a second stop valve is installed at the air inlet of the second air circuit, and a third stop valve is installed at the air inlet of the third air circuit.

[0013] Furthermore, the first support plate is provided with a first communicating air path, and the first air path, the second air path and the third air path are parallel and are all in fluid communication with the first communicating air path at one end.

[0014] Furthermore, the second support plate is provided with a second communicating air path, and the second communicating air path is fluidically connected to the first air path.

[0015] Furthermore, a first stop valve is installed at the air inlet of the first communicating air path, and a vent valve is installed at the air outlet of the second communicating air path.

[0016] Furthermore, the first stop valve, the second stop valve and the third stop valve are all installed on the first support plate; and the air release valve is installed on the second support plate.

[0017] Furthermore, the stepped pressure calibration bench also includes an adapter, which is provided with a fourth gas path, one end of which is fluidically connected to the first connecting gas path, and the other end of which is used to be fluidically connected to an external gas source.

[0018] Furthermore, the first step, the second step and the third step are arranged in sequence from top to bottom, connected by the first support plate and the second support plate, and the adapter is connected to the third step.

[0019] Furthermore, the stepped pressure gauge calibration bench includes a fine-tuning piston, and the fine-tuning piston is used to adjust the pressure in the first gas circuit, the second gas circuit and the third gas circuit.

[0020] Based on the above technical solutions, the technical effects that can be achieved by the present invention are analyzed as follows:

[0021] The utility model provides a stepped pressure gauge test bench, which includes a test bench body; the test bench body includes a first support plate and a second support plate that are arranged opposite to each other, and a plurality of steps arranged in a stepped manner between the first support plate and the second support plate; each step is provided with an air path extending along the length direction of the step, and a plurality of gauge parts connected to the air path are installed on the upper surface; the air path in one of the steps is used to be connected to an external air source and atmospheric fluid, and the air paths in the other steps are connected to the air path of the step through the first support plate fluid. When the stepped pressure gauge test bench is used, a standard pressure gauge is installed on any gauge part on the step connected to the external air source fluid, and a pressure gauge to be tested is installed on other gauge parts; an external air source is used to inflate the air path, increase the pressure in the air path, and compare the values ​​of the standard pressure gauge and the pressure gauge to be tested, to detect whether the pressure gauge to be tested is qualified; after the test is completed, the air path is connected to the atmosphere to deflate, and the pressure gauge to be tested is disassembled.

[0022] The multiple steps are arranged in a stepped manner so that the pressure gauges to be tested installed on the gauge parts will not block each other, making it convenient to read the pressure gauges to be tested; the length of the calibration table is shortened to ensure that the operator can read the readings at eye level in the entire area, which reduces the reading burden on the operator and improves the reading accuracy.

[0023] There are multiple steps, and each step is provided with multiple gauges, which increases the number of pressure gauges to be tested in a single test and improves calibration efficiency.

[0024] The stepped pressure gauge calibration bench sets up gas circuits through multiple steps and realizes corresponding fluid communication of multiple gas circuits through the first support plate. There is no need to use pipe joints, which reduces the number of pipe joints and avoids the problem of air leakage at the pipe joints due to long-term use. In addition, there are no exposed pipes on the calibration bench, making the calibration bench neat and easy to clean.

[0025] The gas circuit is connected to the external gas source fluid to realize the detection by gas medium, making the detection more convenient, clean and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a stepped pressure gauge calibration platform provided by an embodiment of the utility model;

[0028] Figure 2 A front view of a stepped pressure gauge calibration platform provided by an embodiment of the utility model;

[0029] Figure 3 A side view of a stepped pressure gauge calibration bench provided by an embodiment of the utility model;

[0030] Figure 4 A top view of a stepped pressure gauge calibration platform provided by an embodiment of the utility model;

[0031] Figure 5 A rear view of a stepped pressure gauge calibration platform provided by an embodiment of the utility model;

[0032] Figure 6 A cross-sectional view of the third step in the stepped pressure gauge calibration bench provided in an embodiment of the utility model.

[0033] icon:

[0034] 100 - inspection table body; 110 - first support plate; 120 - second support plate; 130 - first step; 210 - first stop valve; 220 - vent valve; 140 - second step; 230 - second stop valve; 150 - third step; 151 - third air path; 240 - third stop valve; 160 - gauge; 170 - adapter; 180 - fine-tuning piston. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] The pressure gauge calibration bench is a device that works with the pressure standard to complete the inspection and calibration work. The existing pressure gauge calibration bench includes a multi-channel pressure gauge calibration bench, which is connected in series with stainless steel pipes, and there is a risk of air leakage at the connection; and when there are multiple gauge positions, the calibration bench is large in size and occupies a large space, and the multiple pressure gauges to be inspected installed on the calibration bench will block each other, affecting the operator's reading of the pressure gauges to be inspected.

[0043] In view of this, see Figures 1 to 6 The stepped pressure gauge calibration bench provided by the embodiment of the utility model includes a calibration bench body 100; the calibration bench body 100 includes a first support plate 110 and a second support plate 120 arranged opposite to each other, and a plurality of steps arranged in a stepped manner between the first support plate 110 and the second support plate 120; each step is provided with an air path extending along the length direction of the step, and a plurality of gauge parts 160 connected to the air path are installed on the upper surface; the air path in one of the steps is used to be connected to an external air source and atmospheric fluid, and the air paths in other steps are connected to the air path of the step through the first support plate 110 fluid.

[0044] Specifically, in this embodiment, the first support plate 110, the second support plate 120 and the step are all made of aluminum alloy plates, and holes are directly punched in the aluminum alloy plates to form gas paths; the aluminum alloy plates are connected by screws, etc., and the gas paths are connected at the same time, so that no pipe joints are required. Preferably, the width and height of each step are consistent.

[0045] When using the stepped pressure gauge calibration bench, install the standard pressure gauge on any one of the gauge pieces 160 on the steps that are connected to the external gas source fluid, and install the pressure gauge to be tested on other gauge pieces 160; use the external gas source to inflate the gas circuit, increase the pressure in the gas circuit, and compare the values ​​of the standard pressure gauge and the pressure gauge to be tested to detect whether the pressure gauge to be tested is qualified; after the test is completed, the gas circuit is connected to the atmosphere to deflate, and the pressure gauge to be tested is disassembled. Multiple steps are arranged in a stepped shape, so that the pressure gauges to be tested installed on the gauge piece 160 will not block each other, which is convenient for reading the pressure gauge to be tested; and the length of the calibration bench is shortened, ensuring that the operator can read the reading at eye level in the entire area when reading, reducing the operator's reading burden and improving the reading accuracy. There are multiple steps, and each step is provided with multiple gauge pieces 160, which increases the number of pressure gauges to be tested in a single test and improves the calibration efficiency. The stepped pressure gauge calibration table sets gas circuits through multiple steps and realizes corresponding fluid communication of multiple gas circuits through the first support plate 110, without the need for pipe joints, reducing the number of pipe joints, and avoiding the problem of air leakage at the pipe joints due to long-term use; and there are no exposed pipes on the calibration table, making the calibration table neat and easy to clean. The gas circuit is connected to the external gas source fluid to realize the use of gas medium detection, making the detection more convenient, clean and efficient.

[0046] The following is a detailed description of the structure and shape of the stepped pressure gauge calibration bench:

[0047] In an optional scheme of an embodiment of the utility model, the multiple steps include a first step 130, a second step 140 and a third step 150. The first step 130 is provided with a first gas path, and the first gas path is used to communicate with an external gas source and atmospheric fluid; the second gas path of the second step 140 is connected to the first gas path fluid; the third gas path 151 of the third step 150 is connected to the first gas path fluid.

[0048] Specifically, in this embodiment, see Figures 1 to 5 , there are three steps, respectively named as the first step 130, the second step 140 and the third step 150, and five position members 160 are installed on each step. Furthermore, the positions of the position members 160 installed on the multiple steps are correspondingly arranged. Of course, the staggered arrangement of the position members 160, that is, the staggered arrangement of the position members 160 on two adjacent steps, should also be within the protection scope of the embodiment of the utility model.

[0049] The first step 130 , the second step 140 and the third step 150 are arranged in a stepped manner so that the pressure gauges to be tested installed on the gauge position member 160 will not block each other, thereby facilitating reading of the pressure gauges to be tested.

[0050] In an optional solution of the embodiment of the utility model, a second stop valve 230 is installed at the air inlet of the second air path, and a third stop valve 240 is installed at the air inlet of the third air path 151 .

[0051] Specifically, the second step 140 and the third step 150 can be provided with pressure gauges of different ranges to be inspected, and simultaneous inspection of different ranges can be achieved by controlling the opening and closing of the second gas path 151. For specific inspection steps, see the detailed step description below.

[0052] The second stop valve 230 is used to control the opening and closing of the second gas path, and the third stop valve 240 is used to control the opening and closing of the third gas path 151, so as to realize the simultaneous calibration of three pressure gauges with different ranges.

[0053] In an optional solution of the embodiment of the utility model, the first support plate 110 is provided with a first communicating air path, and the first air path, the second air path and the third air path 151 are parallel and all have one end connected to the first communicating air path fluid.

[0054] Specifically, the first communication air path extends along the height direction of the first support plate 110. Figure 1 and Figure 3 The first support plate 110 is provided with a first process hole to reduce the weight of the first support plate 110 .

[0055] The first connecting air path realizes fluid connection among the first air path, the second air path and the third air path 151, and realizes the overall air path in the form of a tree-like fork, so that the air path reaching each surface position component 160 is as short as possible, and the air paths between various components are ensured to be unobstructed.

[0056] In an optional solution of the embodiment of the utility model, the second support plate 120 is provided with a second communicating air path, and the second communicating air path is fluidly connected to the first air path.

[0057] Specifically, the second support plate 120 is provided with a second process hole to reduce the weight of the second support plate 120 .

[0058] The second communicating gas path is in fluid communication with the first gas path, so as to facilitate the communication of the first gas path with the atmosphere.

[0059] In an optional solution of the embodiment of the utility model, a first stop valve 210 is installed at the air inlet of the first connecting air path, and a vent valve 220 is installed at the air outlet of the second connecting air path.

[0060] The first stop valve 210 controls the opening and closing of the first communicating gas path, thereby controlling the connection or isolation between the first gas path and the external gas source. The air release valve 220 controls the opening and closing of the second communicating gas path, thereby controlling the connection or isolation between the first gas path and the atmosphere.

[0061] In an optional solution of the embodiment of the utility model, the first stop valve 210 , the second stop valve 230 and the third stop valve 240 are all installed on the first support plate 110 ; and the air release valve 220 is installed on the second support plate 120 .

[0062] Specifically, the first stop valve 210 is installed on the first support plate 110, and the execution end passes through the first support plate 110 and extends into the first communicating air path to control the opening and closing of the first communicating air path. Similarly, the second stop valve 230 is installed on the first support plate 110, and the execution end passes through the first support plate 110 and extends into the second air path to control the opening and closing of the second air path. Similarly, the third stop valve 240 is installed on the first support plate 110, and the execution end passes through the first support plate 110 and extends into the third air path 151 to control the opening and closing of the third air path 151. The air release valve 220 is installed on the second support plate 120, and the execution end passes through the second support plate 120 and extends into the second communicating air path to control the opening and closing of the second communicating air path.

[0063] The first stop valve 210, the second stop valve 230 and the third stop valve 240 are all installed on the first support plate 110, and the first support plate 110 is located on the right hand side of the operator, which is convenient for the operator to operate. The air release valve 220 is installed on the second support plate 120, and the second support plate 120 is located on the left hand side of the operator, which is convenient for the operator to operate.

[0064] In an optional solution of the embodiment of the utility model, the stepped pressure calibration platform also includes an adapter 170, which is provided with a fourth gas path, one end of which is fluidly connected to the first connecting gas path, and the other end is used to be fluidly connected to an external gas source.

[0065] Specifically, the external gas source can be a nitrogen bottle or a pressure pump. Figure 1 and Figure 5 The extension direction of the fourth gas path is perpendicular to the extension direction of the first gas path, so that the gas inlet interface of the fourth gas path is located on the back of the stepped pressure calibration table, which is convenient for connection with an external gas source.

[0066] The adapter 170 realizes fluid communication between the first communicating air path and the external air source.

[0067] In an optional solution of the embodiment of the utility model, the first step 130 , the second step 140 and the third step 150 are arranged in sequence from top to bottom, connected by the first support plate 110 and the second support plate 120 , and the adapter 170 is connected to the third step 150 .

[0068] Specifically, the first step 130 is at the highest position, followed by the second step 140 and the third step 150. Figure 6The fourth gas path of the adapter 170 is vertically connected to the third gas path 151 of the third step 150, and the connection point between the two is the connection point of the third gas path 151; the first end of the third gas path 151 is fluidly connected to the first connecting gas path, and the second end is closed, and the execution end of the third stop valve 240 is located between the second end of the third gas path 151 and the connection point, ensuring that the fourth gas path and the first connecting gas path are not affected by the third stop valve 240.

[0069] The adapter 170 is connected to the third step 150 to achieve installation of the adapter 170 and effectively utilize the space below the first step 130 and the second step 140 to reduce the space occupied by the stepped pressure gauge calibration bench.

[0070] In an optional solution of the embodiment of the utility model, the stepped pressure gauge calibration platform includes a fine-tuning piston 180, and the fine-tuning piston 180 is used to adjust the pressure in the first gas circuit, the second gas circuit and the third gas circuit.

[0071] Specifically, the fine-tuning piston 180 is installed on the third step 150 and extends between the first end and the connecting point of the third gas circuit 151 to change the pressure in the first gas circuit; the gas circuit position of the fine-tuning piston 180 is located after the first stop valve 210 and before the second stop valve 230 and the third stop valve 240.

[0072] The fine adjustment piston 180 helps to improve the adjustment accuracy of the air pressure.

[0073] The following is a detailed description of the steps for using the stepped pressure gauge calibration bench:

[0074] The stepped pressure gauge calibration bench includes four usage modes: using the first step 130 alone; using the first step 130 and the second step 140 in combination; using the first step 130 and the third step 150 in combination; and using the first step 130, the second step 140 and the third step 150 simultaneously.

[0075] The operation process is as follows:

[0076] Open the bleed valve 220 - close the first stop valve 210 - install a standard pressure gauge - install the pressure gauge to be inspected - close the bleed valve 220 - open the second stop valve 230 and the third stop valve 240 - open the first stop valve 210 - control the pressure of the first stop valve - fine-tune the fine-tuning piston 180 - close the first stop valve 210 and the second stop valve 230 as required by the range - open the first stop valve 210 - repeat the adjustment operation to the upper limit - close the first stop valve 210, open the bleed valve 220, and perform return stroke calibration - control the pressure of the bleed valve 220 - fine-tune the fine-tune piston 180 - open the first stop valve 210 and the second stop valve 230 as required by the range - repeat the adjustment operation to the upper limit - open the bleed valve 220 - disassemble the pressure gauge to be inspected.

[0077] The technical indicators of the stepped pressure gauge calibration station include:

[0078] 1. The pressure resistance of each mechanism and high-pressure gas line is greater than 6MPa.

[0079] 2. The adjustment range of the fine-tuning piston 180 can reach -0.025~0.035MPa, and the adjustment accuracy can reach 0.0001MPa.

[0080] 3. According to the external dimensions of a 100mm pressure gauge, the distance between gauge pieces 160 is determined to be 110mm, and the height difference of each level is 150mm, which means that the pressure equipment to be inspected can be installed conveniently without blocking the line of sight.

[0081] The advantages of the stepped pressure gauge calibration bench are described in detail below:

[0082] 1. The calibration bench can calibrate up to 15 pressure gauges at the same time, and can calibrate three different ranges of pressure gauges at the same time. The calibration efficiency is more than 7 times that of traditional calibration benches.

[0083] 2. The addition of the fine-tuning piston 180 makes it capable of adjustment and can be used independently.

[0084] 3. The three-layer design avoids the occurrence of obstructed reading.

[0085] 4. The internal punching connection process is adopted to reduce the number of joints, improve the pressure holding performance and make the appearance neater.

[0086] 5. The air inlet connector is located at the back, making full use of the space on the inspection table.

[0087] 6. The positions of the first stop valve 210 and the air release valve 220 are designed according to the operator's habits, making it easier for the operator to get started and easy to operate.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A stepped pressure gauge calibration bench, characterized in that: include: The calibration table body (100); The inspection table body (100) comprises a first support plate (110) and a second support plate (120) which are arranged opposite to each other, and a plurality of steps arranged in a ladder shape between the first support plate (110) and the second support plate (120); Each step is provided with an air path extending along the length direction of the step, and a plurality of position measuring parts (160) communicating with the air path are installed on the upper surface; The air path in one of the steps is used to be in fluid communication with an external air source and the atmosphere, and the air paths in the other steps are in fluid communication with the air path of the step through the first support plate (110).

2. The stepped pressure gauge calibration platform according to claim 1 is characterized in that: The plurality of steps include a first step (130), a second step (140) and a third step (150), the first step (130) being provided with a first gas path, the first gas path being used for communicating with an external gas source and atmospheric fluid; The second gas path of the second step (140) is in fluid communication with the first gas path; The third gas path (151) of the third step (150) is in fluid communication with the first gas path.

3. The stepped pressure gauge calibration platform according to claim 2 is characterized in that: A second stop valve (230) is installed at the air inlet of the second air path, and a third stop valve (240) is installed at the air inlet of the third air path (151).

4. The stepped pressure gauge calibration platform according to claim 3 is characterized in that: The first support plate (110) is provided with a first communicating air path, and the first air path, the second air path and the third air path (151) are parallel and all have one end connected to the first communicating air path fluid.

5. The stepped pressure gauge calibration platform according to claim 4 is characterized in that: The second support plate (120) is provided with a second communicating air path, and the second communicating air path is fluidically connected to the first air path.

6. The stepped pressure gauge calibration platform according to claim 5, characterized in that: A first stop valve (210) is installed at the air inlet of the first communicating air path, and a purge valve (220) is installed at the air outlet of the second communicating air path.

7. The stepped pressure gauge calibration platform according to claim 6 is characterized in that: The first stop valve (210), the second stop valve (230) and the third stop valve (240) are all installed on the first support plate (110); and the air release valve (220) is installed on the second support plate (120).

8. The stepped pressure gauge calibration platform according to claim 7, characterized in that: The stepped pressure gauge calibration platform also includes an adapter (170), wherein the adapter (170) is provided with a fourth gas path, one end of the fourth gas path is fluidly connected to the first connecting gas path, and the other end is used for fluidly connecting to an external gas source.

9. The stepped pressure gauge calibration platform according to claim 8, characterized in that: The first step (130), the second step (140) and the third step (150) are arranged in sequence from top to bottom, connected by the first support plate (110) and the second support plate (120), and the adapter (170) is connected to the third step (150).

10. The stepped pressure gauge calibration platform according to any one of claims 2 to 9, characterized in that: The stepped pressure gauge test bench comprises a fine-tuning piston (180), and the fine-tuning piston (180) is used to adjust the pressure in the first gas circuit, the second gas circuit and the third gas circuit.

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