Gas cylinder pressure reducer verification device

Abstract

The utility model discloses a gas cylinder pressure reducer verification device, which comprises a plurality of joints and a column, and is characterized in that the first joint is connected with a gas source and is provided with a first valve; the second joint is communicated with the first joint and is provided with a high-pressure precision standard meter; a first inner threaded hole is machined in the position, close to the top, of the stand column, a second inner threaded hole is machined in the position, close to the bottom, of the stand column, a first connector is arranged on the first inner threaded hole and used for being communicated with a gas cylinder pressure reducer to be verified, and a second connector is arranged on the second inner threaded hole and provided with a second valve. The first inner threaded hole and the second inner threaded hole are connected through a communicating hole channel, and the communicating hole channel communicates with the first connector. The third joint is respectively communicated with the second valve, the gas cylinder pressure reducer to be verified and the fourth joint; the fourth joint is provided with a low-pressure precision standard meter; according to the gas cylinder pressure reducer calibration device, the high pressure gauge and the low pressure gauge on the calibrated gas cylinder pressure reducer can be calibrated at the same time.

Description

Technical Field

[0001] This utility model relates to the field of calibration device technology, specifically a calibration device for a gas cylinder pressure reducer. Background Technology

[0002] Oxygen, argon, nitrogen, acetylene, and other gases are widely used in industrial fields, with broad applications in machinery, chemical products, aerospace, and aviation products. Pressure regulators used on oxygen, argon, nitrogen, and acetylene cylinders are essential components to ensure the safe, reliable, and normal use of these gases. To guarantee their proper functioning, pressure regulators need to be calibrated regularly.

[0003] Existing gas cylinder pressure regulator calibration devices include manual pressurization pumps, standard high and low pressure precision gauges, etc. The high and low pressure gauges in the gas cylinder pressure regulator must be disassembled and installed separately on a manual pressurization calibration platform. The high and low pressure gauges in the gas cylinder pressure regulator are compared and calibrated with the standard high and low pressure precision gauges by manual pressurization. After the calibration is completed, they are reinstalled on the pressure regulator. This is inefficient and the repeated disassembly and reassembly can damage the gas cylinder pressure regulator. Utility Model Content

[0004] The purpose of this invention is to provide a gas cylinder pressure regulator calibration device that can calibrate the high and low pressure gauges on the pressure regulator in one operation.

[0005] The technical solution of this utility model is:

[0006] A gas cylinder pressure regulator calibration device includes: a first connector, the input end of which is connected to a gas source via a first gas supply pipe, and a first valve is configured on the first connector; a second connector, the input end of which is connected to the output end of the first connector via a connecting pipe, and a high-pressure precision standard gauge is configured on the second connector; a vertically arranged column, with a connecting channel along its height direction inside, a first internal threaded hole machined near the top of the column, and a second internal threaded hole machined near the bottom, the first internal threaded hole being configured with a stainless steel first interface for connecting to the gas cylinder pressure regulator to be calibrated, and the second internal threaded hole being 90 mm from the center of the base plate and having an M20×15... The external thread is configured with a stainless steel second interface. 90mm is the minimum value to ensure that the standard pressure gauge does not interfere with the column when installing or removing the standard pressure gauge. The second interface is equipped with a second valve. The first internal thread hole and the second internal thread hole are connected by a Ø7mm connecting channel to ensure the flow of high-pressure gas. The side of the column is machined with a Ø7mm connecting hole, which communicates with the Ø7mm connecting channel inside the column, and the connecting hole is connected to the output end of the first connector through a connecting pipe. The third connector is a three-way connector. Its first connecting port is connected to the second valve through a second gas supply pipe, and its second connecting port is connected to the pressure regulator of the gas cylinder being calibrated through a third gas supply pipe. The fourth connector is equipped with a low-pressure precision standard gauge. The fourth connector is connected to the third connecting port of the third connector through a connecting pipe. The fifth connector is connected to the fourth connector through a connecting pipe, and the fifth connector is equipped with a third valve.

[0007] Furthermore, the base plate has multiple connection holes, and studs are provided on the first connector, second connector, column, third connector, fourth connector and fifth connector. Each stud is provided with a nut, and each stud can pass through the connection hole to penetrate the base plate.

[0008] Furthermore, the first, second, and third gas supply pipes are all Ø6mm gas supply pipes. The gas supply pipes for gas flow are made of Ø6mm tubing, while the high-pressure pipe is inserted into a Ø7mm connecting channel and then welded to prevent leakage.

[0009] Furthermore, the first valve, the second valve, and the third valve are all needle butterfly valves.

[0010] Furthermore, all connecting pipes are made of high-pressure Ø6mm stainless seamless steel pipe, capable of withstanding a pressure of 63MPa to meet the calibration requirements.

[0011] Furthermore, the third gas supply pipe is a flexible tube.

[0012] Furthermore, the high-pressure precision standard meter has a range of 0MPa to 40MPa and an accuracy class of 0.25; the low-pressure precision standard meter has a range of 0MPa to 4MPa and an accuracy class of 0.25.

[0013] Furthermore, the size of the connecting channel is Ø7mm, and the gas supply pipe is made of Ø6mm pipe, which is inserted into the Ø7mm connecting channel and welded to prevent gas leakage.

[0014] Furthermore, the first gas supply pipe is connected to the gas source via a wire.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 0. This utility model can calibrate by comparing the data of the high and low pressure gauges on the pressure regulator with the data of the standard high and low pressure precision standard gauges through a single installation. The calibration of the high and low pressure gauges on the gas cylinder pressure regulator can be completed in one operation. This not only eliminates the need for frequent disassembly and installation of the high and low pressure gauges in the pressure regulator, thus improving the efficiency of calibration, but also avoids damage to the threads and stripping of the high and low pressure gauge connection parts caused by frequent disassembly and installation.

[0017] 1. This utility model does not require a dedicated gas source during calibration. It can periodically calibrate various types of gas cylinder pressure regulators according to actual needs, meeting the calibration requirements of various industries for gas cylinder pressure regulators used in various types of gas cylinders and satisfying metrological management requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the implementation and use of the gas cylinder pressure reducer calibration device of this utility model.

[0019] Among them, 1. base plate, 2. first connector, 2-1. first valve, 2-2. first gas supply pipe, 3. second connector, 3-1. high pressure precision standard gauge, 4. column, 4-1. first interface, 4-2. second interface, 4-3. second valve, 5. third connector, 6. second gas supply pipe, 7. third gas supply pipe, 8. fourth connector, 8-1. low pressure precision standard gauge, 9. fifth connector, 9-1. third valve, 10. pressure reducer of the gas cylinder to be calibrated. Detailed Implementation

[0020] The following is combined Figure 1The specific embodiments of this utility model will be described in detail below. In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and 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.

[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] Example

[0023] like Figure 1As shown, a gas cylinder pressure regulator calibration device is applicable to the calibration of pressure regulators for gas cylinders such as oxygen, argon, nitrogen, and acetylene. It includes: multiple connectors and a column 4; the gas source can be oxygen, argon, nitrogen, or acetylene; the multiple connectors are designated as first connector 2, second connector 3, third connector 5, fourth connector 8, and fifth connector 8; the input end of the first connector 2 is connected to the gas source via a first gas supply pipe 2-2; the first connector 2 is equipped with a first valve 2-1, which supplies high-pressure gas to the first connector 2 via the first gas supply pipe 2-2; the input end of the second connector 3 is connected to a... The pipe is connected to the output end of the first connector 2. A high-pressure precision standard gauge 3-1 is installed on the second connector 3. The high-pressure precision standard gauge 3-1 is used to compare with the high-pressure gauge of the gas cylinder pressure regulator 10 being calibrated. The column 4 is vertically installed, with a connecting channel along its height. A first internal threaded hole is machined near the top of the column 4, and a second internal threaded hole is machined near the bottom. A stainless steel first interface 4-1 is installed on the first internal threaded hole, which is used to connect to the gas cylinder pressure regulator 10 being calibrated. The center distance of the second internal threaded hole from the bottom plate is 90 mm. The column 4 has a stainless steel second interface 4-2 with an M20×15 mm external thread. The second interface 4-2 is equipped with a second valve 4-3. The first internal thread hole and the second internal thread hole are connected by a connecting channel to ensure the flow of high-pressure gas. The side of the column 4 is machined with a Ø7 mm connecting hole, which is connected to the connecting channel inside the column 4. The connecting hole is connected to the output end of the first connector 2 through a connecting pipe. The third connector 5 is a three-way connector. Its first connecting port is connected to the second valve 4-3 through the second gas supply pipe 6. The second connecting port is connected to the pressure reducer 10 of the gas cylinder being calibrated through the third gas supply pipe 7. The fourth connector 8 is equipped with a low-pressure precision standard gauge 8-1. The fourth connector 8 is connected to the third connecting port of the third connector 5 through a connecting pipe. The fifth connector 9 is connected to the fourth connector 8 through a connecting pipe, and the fifth connector 9 is equipped with a third valve 9-1.

[0024] In some embodiments, the gas cylinder pressure regulator calibration device further includes a base plate 1, such as Figure 1 As shown, multiple connection holes are opened on the base plate 1, and studs are provided on the first connector 2, the second connector 3, the column 4, the third connector 5, the fourth connector 8 and the fifth connector 9. Each stud is equipped with a nut, and each stud can pass through the connection hole to penetrate the base plate 1. After the stud passes through the connection hole, it is fixed by the nut.

[0025] In some embodiments, the first gas supply pipe 2-2, the second gas supply pipe 6, and the third gas supply pipe 7 are all Ø6mm high-pressure gas pipes.

[0026] In some embodiments, the first valve 2-1, the second valve 4-3, and the third valve 9-1 are all needle butterfly valves.

[0027] In some embodiments, the connecting pipes are all made of high-pressure Ø6mm stainless seamless steel pipes. They can withstand a pressure of 63MPa to meet the calibration requirements. The base plate 1, stainless steel joints, threaded connections, and third joint 5 are all made of FV520B stainless steel aged material with a hardness of HRC26~31. This material has high strength and a long service life.

[0028] In some embodiments, the third gas supply pipe 7 is a flexible tube.

[0029] In some embodiments, the high-pressure precision standard meter 3-1 has a range of 0MPa to 40MPa and an accuracy class of 0.25; the low-pressure precision standard meter 8-1 has a range of 0MPa to 4MPa and an accuracy class of 0.25.

[0030] In some embodiments, the size of the connecting channel is Ø7mm, and the gas supply pipe is made of Ø6mm pipe, which is inserted into the Ø7mm connecting channel and then welded to prevent gas leakage.

[0031] In some embodiments, the first gas supply pipe 2-2 is connected to a gas source via a pair of wires.

[0032] During calibration, the second valve 4-3 is closed, the gas source is turned on, and high-pressure gas is transmitted to the first connector 2 through the first gas supply pipe 2-2. The first valve 2-1 of the first connector 2 is opened to its maximum, maintaining a large volume and high pressure. The high-pressure gas is then transmitted to the second connector 3 through the connecting pipe. In the second connector 3, the high-pressure gas is split into two paths: one path is transmitted to the high-pressure precision standard gauge 3-1, and the other path is transmitted to the column 4. From there, the gas is transmitted through the first interface 4-1 at the top of the column 4 to the high-pressure gauge on the pressure regulator 10 of the gas cylinder being calibrated. The values ​​of the high-pressure precision standard gauge 3-1 and the high-pressure gauge on the pressure regulator 10 of the gas cylinder being calibrated are compared to determine whether the high-pressure gauge of the pressure regulator 10 meets the relevant requirements, thus completing the calibration process. The calibration of the high-pressure gauge on the gas cylinder pressure regulator 10 involves partially opening the second valve 4-3 on the second interface 4-2 to maintain a low gas flow and low pressure. The low-pressure gas is then transmitted through the second gas supply pipe 6 to the third connector 5. The third connector 5 splits the low-pressure gas into two paths: one path is transmitted through the third gas supply pipe 7 to the low-pressure gauge on the gas cylinder pressure regulator 10 being calibrated, and the other path is transmitted through a connecting pipe to the low-pressure precision standard gauge 8-1 on the fourth connector 8. By comparing the values ​​of the low-pressure precision standard gauge 10-2 and the low-pressure gauge on the gas cylinder pressure regulator 10 being calibrated, it is determined whether the low-pressure gauge on the gas cylinder pressure regulator 10 meets the relevant requirements, thus completing the calibration of the low-pressure gauge on the pressure regulator. After the high and low pressure gauges on the gas cylinder pressure regulator 10 are calibrated, the gas in the system is released through the third valve 9-1 on the fifth connector 9, completing one calibration cycle.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A gas cylinder pressure regulator calibration device, characterized in that, include: The first connector (2) has an input end connected to a gas source via a first gas supply pipe (2-2), and a first valve (2-1) is provided on the first connector (2). The second connector (3) has its input end connected to the output end of the first connector (2) via a connecting pipe. A high-voltage precision standard meter (3-1) is installed on the second connector (3). The column (4) is set vertically and has a connecting channel along its height. The column (4) has a first interface (4-1) near the top for connecting to the gas cylinder pressure reducer (10) to be tested. The column (4) has a second interface (4-2) near the bottom. The second interface (4-2) is equipped with a second valve (4-3). The first interface (4-1) and the second interface (4-2) are both connected to the connecting channel. The output end of the second connector (3) is connected to the connecting channel of the column (4) through a connecting pipe. The third connector (5) is a three-way connector. Its first connection port is connected to the second valve (4-3) through the second gas supply pipe (6), and its second connection port is connected to the gas cylinder pressure reducer (10) being tested through the third gas supply pipe (7). The fourth connector (8) is equipped with a low-pressure precision standard meter (8-1), and the fourth connector (8) is connected to the third port of the third connector (5) through a connecting pipe; The fifth connector (9) is connected to the fourth connector (8) via a connecting pipe, and the fifth connector (9) is equipped with a third valve (9-1).

2. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, It also includes a base plate (1), on which multiple connection holes are provided. The first connector (2), the second connector (3), the column (4), the third connector (5), the fourth connector (8) and the fifth connector (9) are all equipped with studs. Each stud is equipped with a nut, and each stud can penetrate the base plate (1) through the connection hole.

3. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The first gas pipe (2-2), the second gas pipe (6) and the third gas pipe (7) are all Ø6mm high-pressure gas pipes.

4. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The first valve (2-1), the second valve (4-3), and the third valve (9-1) are all needle butterfly valves.

5. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, All connecting pipes are made of high-pressure Ø6mm stainless seamless steel pipe.

6. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The third gas supply pipe (7) is a flexible tube.

7. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The high-pressure precision standard meter (3-1) has a range of 0MPa to 40MPa and an accuracy class of 0.25; the low-pressure precision standard meter (8-1) has a range of 0MPa to 4MPa and an accuracy class of 0.

25.

8. The gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The size of the connecting channel is Ø7mm.

9. A gas cylinder pressure regulator calibration device according to claim 1, characterized in that, The first gas supply pipe (2-2) is connected to the gas source through a pair of wires.

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