Verification system of high-pressure gas pressure gauge

Abstract

The utility model discloses a verification system for a high-pressure gas pressure gauge, and the system comprises a supercharging device which is provided with a gas source inlet communicated with an external gas source through a pipeline; a low-pressure gas inlet and a high-pressure gas inlet of the pressure controller are respectively communicated with a low-pressure gas outlet and a high-pressure gas inlet of the supercharging device through pipelines; a gas outlet of the pressure controller is communicated with a to-be-calibrated pressure gauge through a pipeline, and the pressure controller is used for mixing the high-pressure gas and the low-pressure gas entering the pressure controller and then outputting gas with preset pressure to the pressure gauge so as to calibrate the pressure gauge; according to the utility model, air in a compression environment is compressed by the first piston and the second piston to generate a pressure gas source which is up to 100MPa, and the pressure controller is used for realizing gas pressure from 0.1 MPa to 100MPa and reading precision superior to + / -0.1% of standard gas, so that the gas pressure gauge is used for metering.

Description

Technical Field

[0001] This utility model belongs to the field of pressure gauge calibration, and in particular relates to a calibration system for a high-pressure gas pressure gauge. Background Technology

[0002] Currently, pointer-type pressure gauges are widely used in various industries to measure gas pressure in pipelines or containers, with some measuring pressures as high as 50 MPa. These pressure gauges are required to be calibrated periodically to ensure their accuracy and reliability. For gas pressure gauges below 25 MPa, measurement can be completed using manual or automatic pressurization modes. Currently, water is used as the working medium for measuring gas pressures above 25 MPa, which presents the following problems:

[0003] 1) When using pressure measurement standards to calibrate the pressure gauge under test, the working medium of the pressure measurement standard should be consistent with the working medium of the pressure gauge to prevent cross-contamination. However, when calibrating gas pressure gauges with a range of 25MPa to 60MPa, due to the lack of a corresponding high-pressure gas standard pressure generating device, only a water-based pressure measurement standard can be used. Although pressurizing the measurement standard is convenient and simple, some water will remain inside the pressure gauge after calibrating, which is difficult to clean completely. This can easily cause copper pressure gauges to develop verdigris. When the pressure gauge is reinstalled in the system, the verdigris and moisture inside the pressure gauge can easily enter the operating equipment, causing blockage or contamination. In extreme cases, when high-speed airflow impacts verdigris and other metallic impurities, it can easily generate sparks by friction on stainless steel pipelines, which can easily ignite oxygen pipelines and cause safety accidents.

[0004] 2) If special cleaning agents such as carbon tetrachloride are used to clean the internal pipeline of the pressure gauge under test, the Bourdon tube inside the pressure gauge is a single-end closed design, and it is difficult to clean the water after it enters. Problems are likely to occur after the pressure gauge under test is reinstalled.

[0005] 3) In particular, when using pressure gauges to measure high-purity gas working media, it is absolutely forbidden to use other liquids as the measuring working media. At best, the equipment will be contaminated and scrapped; at worst, explosions and other accidents that cause injury or death may occur.

[0006] Therefore, in the existing technology, when gas pressure gauges with a range of 25MPa to 100MPa are used for periodic measurement or calibration, water is used as the working medium, which leads to potential safety hazards in the later use of the pressure gauges. Utility Model Content

[0007] The purpose of this invention is to provide a calibration system for high-pressure gas gauges to solve the problem that when gas pressure gauges with a range of 25MPa to 100MPa are used for periodic measurement or calibration, water is used as the working medium, which leads to potential safety hazards in the later use of the pressure gauges.

[0008] This utility model adopts the following technical solution: a calibration system for a high-pressure gas gauge, comprising:

[0009] The booster device has its air inlet connected to an external air source via a pipeline;

[0010] The pressure controller has a low-pressure gas inlet and a high-pressure gas inlet connected to the low-pressure gas outlet and the high-pressure gas inlet of the booster device, respectively, through pipelines; its gas outlet is connected to the pressure gauge to be calibrated through a pipeline, which is used to mix the high-pressure gas and low-pressure gas entering the pressure controller and output gas at a predetermined pressure to the pressure gauge, thereby calibrating the pressure gauge.

[0011] The booster device includes:

[0012] The first cylinder has a gas inlet and a gas outlet, with the gas inlet connected to an external gas source.

[0013] The second cylinder has a gas inlet and a gas outlet. Its gas inlet is connected to the gas outlet of the first cylinder through a pipe, and its gas outlet is connected to the high-pressure gas inlet of the pressure controller.

[0014] The reversing lever has one end extending into the first cylinder and fixedly connected to the first piston of the first cylinder, and the other end extending into the second cylinder and fixedly connected to the second piston of the second cylinder. A third piston is also fixedly connected to the middle of the reversing lever. The third piston is used for reciprocating motion, which in turn drives the first piston and the second piston to reciprocate motion, thereby causing the gas to be compressed back and forth between the first cylinder and the second cylinder to obtain high-pressure gas.

[0015] Furthermore, the booster device also includes:

[0016] The third cylinder is located around the third piston and has a first adjustment port and a second adjustment port. The first adjustment port and the second adjustment port are arranged opposite to each other and distributed on both sides of the third piston. The first adjustment port is used to introduce gas into the third cylinder, thereby pushing the third piston to move in the direction of the second adjustment port; the second adjustment port is used to introduce gas into the third cylinder, thereby pushing the third piston to move in the direction of the first adjustment port, thereby causing the third piston to reciprocate.

[0017] Furthermore, it also includes: a high-pressure gas storage tank, the inlet of which is connected to the gas outlet of the second cylinder, and the outlet of which is connected to the high-pressure gas inlet of the pressure controller.

[0018] Furthermore, it also includes: a low-pressure gas storage tank, whose inlet is connected to an external gas source and whose outlet is connected to the low-pressure gas inlet of the pressure controller.

[0019] The beneficial effects of this utility model are:

[0020] This invention generates a high-pressure gas source of up to 100MPa by compressing air in the compressed environment through the first and second pistons, and realizes the standard gas with a gas pressure of 0.1MPa to 100MPa and a reading accuracy better than ±0.1% through a pressure controller, which can then be used for gas pressure gauge measurement.

[0021] This invention provides a first adjustment port and a second adjustment port in the third cylinder, which allows the gas entering the third cylinder to drive the third piston to reciprocate. This, in turn, drives the first piston and the second piston to reciprocate via a reversing rod, thereby compressing the gas back and forth between the first cylinder and the second cylinder to obtain high-pressure gas. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the pressurization device in this utility model.

[0024] Among them: 10, booster device; 11, pressure controller; 12, first cylinder; 13, second cylinder; 14, reversing rod; 15, first piston; 16, second piston; 17, third cylinder; 18, third piston; 19, high-pressure air tank; 20, low-pressure air tank. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] This utility model discloses a calibration system for a high-pressure gas gauge, such as... Figure 1 As shown, it includes a pressurization device 10 and a pressure controller 11.

[0028] The booster device 10 has a gas source inlet, a low-pressure gas outlet, and a high-pressure gas outlet. The gas source inlet of the booster device 10 is connected to an external gas source through a pipeline.

[0029] The pressure controller 11 has a low-pressure gas inlet, a high-pressure gas inlet, and a gas outlet. The low-pressure gas inlet of the pressure controller 11 is connected to the low-pressure gas outlet of the booster device 10 through a pipeline. The high-pressure gas inlet of the pressure controller 11 is connected to the high-pressure gas outlet of the booster device 10 through a pipeline. The gas outlet of the pressure controller 11 is connected to the pressure gauge to be calibrated through a pipeline. The pressure controller 11 is used to mix the high-pressure gas and low-pressure gas entering the pressure controller 11 and output gas at a predetermined pressure to the pressure gauge, thereby calibrating the pressure gauge.

[0030] like Figure 2 As shown, the booster device 10 includes: a first cylinder 12, a second cylinder 13, and a reversing lever 14.

[0031] The first cylinder 12 has a gas inlet and a gas outlet, and the gas inlet of the first cylinder 12 is connected to an external gas source; the second cylinder 13 has a gas inlet and a gas outlet, and the gas inlet of the second cylinder 13 is connected to the gas outlet of the first cylinder 12 through a pipe, and the gas outlet of the second cylinder 13 is connected to the high-pressure gas inlet of the pressure controller 11.

[0032] One end of the reversing lever 14 extends into the first cylinder 12 and is fixedly connected to the first piston 15 of the first cylinder 12. The other end of the reversing lever 14 extends into the second cylinder 13 and is fixedly connected to the second piston 16 of the second cylinder 13. A third piston 18 is also fixedly connected to the middle of the reversing lever 14. The third piston 18 is used for reciprocating motion, which in turn drives the first piston 15 and the second piston 16 to reciprocate motion, thereby causing the gas to be compressed back and forth between the first cylinder 12 and the second cylinder 13 to obtain high-pressure gas.

[0033] Because existing technologies lack a suitable high-pressure gas source, only water-based pressure measurement standards can be used. Although pressurization is convenient and simple, some water remains inside the pressure gauge after measurement, making it difficult to clean completely. This can easily cause copper pressure gauges to develop verdigris. When the pressure gauge is reinstalled in the system, the verdigris or moisture inside can easily enter the operating equipment, causing blockages or contamination. In extreme cases, when high-speed airflow impacts verdigris and other metallic impurities, it can easily generate sparks through friction on stainless steel pipelines, potentially igniting oxygen pipelines and causing safety accidents. Therefore, this invention can generate a gas source of up to 100 MPa, allowing for non-destructive calibration and measurement of pressure gauges.

[0034] In one embodiment, the external air source is divided into three paths. The first path enters the low-pressure air storage tank 20, the second path enters the first cylinder 12, and drives the first piston 15 to move to the right. While the gas entering the first cylinder 12 drives the first piston 15, the third external air source enters the third cylinder 17 through the first regulating port of the third cylinder 17 and drives the third piston 18 to move to the right. This causes the first piston 15, the second piston 16, and the third piston 18 to move to the right simultaneously. At this time, gas is forced from the second cylinder 13 into the first cylinder 12. When the first piston 15... When pistons 15, 16, and 18 move to their right limit, the external air source from the third path enters the third cylinder 17 through the second regulating port, driving piston 18 to move to the left. This causes pistons 15, 16, and 18 to move to the left simultaneously. At this time, gas is forced from the first cylinder 12 into the second cylinder 13. When pistons 15, 16, and 18 move to their left limit, they move to the right again. This process is repeated to compress the gas, thereby generating high-pressure gas.

[0035] Regarding the input and output of pressure controller 11, namely, how to calculate the output pressure of pressure controller 11 based on the input low-pressure gas pressure and high-pressure gas pressure, there are no restrictions here, as long as the output gas pressure can be met.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A calibration system for a high-pressure gas gauge, characterized in that, include: The booster device (10) has its air inlet connected to an external air source via a pipeline; The pressure controller (11) has its low-pressure gas inlet and high-pressure gas inlet connected to the low-pressure gas outlet and high-pressure gas inlet of the booster device (10) respectively through pipelines; its gas outlet is connected to the pressure gauge to be calibrated through a pipeline, and is used to mix the high-pressure gas and low-pressure gas entering the pressure controller (11) and output gas at a predetermined pressure to the pressure gauge, thereby calibrating the pressure gauge; The booster device (10) includes: The first cylinder (12) has a gas inlet and a gas outlet, and its gas inlet is connected to an external gas source. The second cylinder (13) has a gas inlet and a gas outlet. Its gas inlet is connected to the gas outlet of the first cylinder (12) through a pipe, and its gas outlet is connected to the high-pressure gas inlet of the pressure controller (11). A reversing rod (14) has one end extending into the first cylinder (12) and fixedly connected to the first piston (15) of the first cylinder (12), and the other end extending into the second cylinder (13) and fixedly connected to the second piston (16) of the second cylinder (13). A third piston (18) is also fixedly connected to the middle of the reversing rod (14). The third piston (18) is used for reciprocating motion, which drives the first piston (15) and the second piston (16) to reciprocate, thereby causing the gas to be compressed back and forth between the first cylinder (12) and the second cylinder (13) to obtain high-pressure gas.

2. The calibration system for a high-pressure gas gauge according to claim 1, characterized in that, The booster device (10) also includes: The third cylinder (17) is located around the third piston (18) and has a first adjustment port and a second adjustment port. The first adjustment port and the second adjustment port are arranged opposite to each other and distributed on both sides of the third piston (18). The first adjustment port is used to introduce gas into the third cylinder (17) and push the third piston (18) to move in the direction of the second adjustment port. The second adjustment port is used to introduce gas into the third cylinder (17) and push the third piston (18) to move in the direction of the first adjustment port, thereby causing the third piston (18) to reciprocate.

3. The calibration system for a high-pressure gas gauge according to claim 1, characterized in that, Also includes: The high-pressure gas storage tank (19) has its inlet connected to the gas outlet of the second cylinder (13) and its outlet connected to the high-pressure gas inlet of the pressure controller (11).

4. The calibration system for a high-pressure gas gauge according to claim 1, characterized in that, Also includes: The low-pressure gas storage tank (20) has its inlet connected to an external gas source and its outlet connected to the low-pressure gas inlet of the pressure controller (11).

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