Manual dual-channel gas pressure regulator

Abstract

A manual dual-channel gas pressure regulator is provided, comprising: a first gas channel including: an inlet valve connected to a gas source; a first fine-tuning unit having an inlet and two outlets, the inlet being connected to the inlet valve and one outlet being connected to the atmosphere via a vent valve; a first connector connected to the other outlet; an isolation valve, one end connected to the other outlet and the other end connected to the second gas channel; and a second gas channel including a second fine-tuning unit, an adapter, and a second connector, the adapter being connected to the other end of the second fine-tuning unit, the second connector, and the isolation valve, respectively; wherein the first and second connectors are used to connect to the piston pressure gauge under test and a standard piston pressure gauge. This reduces the time required for piston pressure gauge balancing experiments and makes operation more convenient.

Description

Technical Field

[0001] This invention relates to the field of pressure measurement, and more particularly to a manual dual-channel gas pressure regulator. Background Technology

[0002] Piston gauges are the most widely used pressure measurement standards. They typically consist of a piston system (piston and piston cylinder), a base for mounting the piston system, and special weights loaded onto the piston. Users need to periodically verify, calibrate, or compare these gauges to ensure the accuracy of their measurements. One of the most important tasks is conducting a balance comparison experiment of the effective piston area. The specific method involves connecting the piston gauge under test to a standard piston gauge via a gas regulator, pipes, valves, and connectors. Special weights of appropriate mass are placed on both the standard and tested pistons. The regulator is used to pressurize both pistons to their working positions. By observing whether they descend at their expected rates, the balance between the two pistons is determined. Weights are then added or removed until the two pistons reach balance, and the effective area of ​​the tested piston is calculated. The experiment requires measuring the descent speed of each piston from its working position. If a piston deviates from its working position, the pressure is adjusted using the regulator to return it to the working position.

[0003] However, existing gas pressure regulators can only adjust the pressure of the two piston pressure gauges connected to them simultaneously when adjusting the pressure to adjust the piston to the working position. For example, when fine-tuning the pressure, the pressure of the two pistons will be changed simultaneously, thereby changing the position of the two pistons. This makes it difficult to make the two pistons exactly in the corresponding working position after fine-tuning. It is necessary to manually lift or press the piston to adjust its position to the correct working position. Moreover, during the manual lifting or pressing process, the two pistons interfere with each other. When one piston is pressed down, the other piston will rise. This often takes more time to adjust them properly.

[0004] Therefore, it is necessary to study a manual dual-channel gas pressure regulator to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0005] To solve at least one of the above-mentioned technical problems, according to one aspect of the present invention, a manual dual-channel gas pressure regulator is provided, characterized in that it comprises:

[0006] The first air passage includes: an intake valve connected to an air source; a first fine-tuning unit having an inlet and two outlets, the inlet being connected to the intake valve and one outlet being connected to the atmosphere via a vent valve; and a first connector connected to the other outlet.

[0007] An isolation valve, one end of which is connected to the other outlet, and the other end of which is connected to the second gas path; and

[0008] The second air path includes a second fine-tuning unit, an adapter, and a second connector, the adapter being connected to the other end of the second fine-tuning unit, the second connector, and the isolation valve, respectively;

[0009] The first and second connectors are used to connect the piston gauge under test to the standard piston gauge.

[0010] According to another aspect of the invention, the gas source includes a nitrogen cylinder.

[0011] According to another aspect of the invention, the intake valve is connected to the air source via a filter.

[0012] According to another aspect of the present invention, the manual dual-channel gas pressure regulator further includes a first three-way connector, which is respectively connected to a first connector, one end of an isolation valve and the other outlet of a first fine-tuning unit.

[0013] According to another aspect of the present invention, the manual dual-channel gas pressure regulator further includes a second three-way component, which is connected between the isolation valve and the first three-way component and is connected to a pressure gauge.

[0014] According to another aspect of the present invention, both the first fine-tuning unit and the second fine-tuning unit are pneumatic fine-tuning pumps.

[0015] According to another aspect of the present invention, a method for calibrating a piston pressure gauge using the aforementioned manual dual-channel gas pressure regulator is also provided, characterized by comprising the following steps:

[0016] Connect the standard piston gauge and the piston gauge under test to the second connector and the first connector respectively, and connect the nitrogen cylinder to the gas source connector.

[0017] Close the vent valve, open and confirm that the isolation valve is in the open position to keep the first and second air passages connected;

[0018] Slowly open the inlet valve to introduce gas from the nitrogen cylinder into the manual dual-channel gas regulator and piston pressure gauge to increase the pressure. When the pressure approaches the target pressure, close the inlet valve.

[0019] The pressure is finely adjusted using the first and second fine-tuning units until one of the pistons in the standard piston gauge and the piston gauge under test rises to the working position.

[0020] Close the isolation valve and continue to fine-tune the other piston, which has not yet risen to the working position, until it reaches the working position;

[0021] Open the isolation valve to allow the two pistons to be connected for a balance comparison experiment;

[0022] The piston pressure gauge under test is calibrated based on the experimental results.

[0023] According to another aspect of the present invention, when it is necessary to observe the downward speed of the piston in the experiment, the isolation valve is closed, and the downward speed of each of the two pistons is observed separately to determine whether the two pistons have reached a balanced state, and to add or remove weights.

[0024] This invention can achieve one or more of the following technical effects:

[0025] 1. It helps reduce the time required for piston pressure gauge balancing experiments and makes operation more convenient;

[0026] 2. By creatively combining coarse adjustment with air inflation, dual fine adjustment pumps, and single adjustment with fine adjustment pumps, rapid balance adjustment of the two air paths is achieved, improving the calibration efficiency of the piston pressure gauge.

[0027] 3. It adopts a dual-air-path design, and each path can be independently fine-tuned. After the two pistons are connected through the pressure regulator, they can be isolated from each other at each pressure point using the isolation valve between the two air paths. The piston descent speed of the two piston pressure gauges can be measured separately, which can be used as a standard to judge the balance. The independent fine-tuning pump can fine-tune the working position of the two pistons to avoid affecting the other piston. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a simplified structural diagram of a manual dual-channel gas pressure regulator according to a preferred embodiment of the present invention. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. These specific embodiments are intended to illustrate the present invention in detail, but should not be construed as limiting the present invention. Various modifications and variations can be made without departing from the spirit and scope of the present invention, and all of these should be included within the protection scope of the present invention.

[0031] Example 1

[0032] According to a preferred embodiment of the present invention, see Figure 1 A manual dual-channel gas pressure regulator is provided, characterized by comprising:

[0033] The first air passage includes: an intake valve connected to an air source; a first fine-tuning unit having an inlet and two outlets, the inlet being connected to the intake valve and one outlet being connected to the atmosphere via a vent valve; and a first connector connected to the other outlet.

[0034] An isolation valve, one end of which is connected to the other outlet, and the other end of which is connected to the second gas path; and

[0035] The second air path includes a second fine-tuning unit, an adapter, and a second connector, the adapter being connected to the other end of the second fine-tuning unit, the second connector, and the isolation valve, respectively;

[0036] The first and second connectors are used to connect the piston gauge under test to the standard piston gauge.

[0037] Advantageously, this invention allows for simultaneous and / or individual pressure regulation of two piston-type pressure gauges connected thereto for balancing and comparison. The regulator is internally designed with an isolation valve to separate the two pistons, facilitating independent measurement of their descent speed. Furthermore, the two equipped fine-tuning units allow for independent pressure adjustments of each piston without interference, and can also be used in conjunction. Preferably, the first fine-tuning unit is a right fine-tuning unit, and the second fine-tuning unit is a left fine-tuning unit. The first connector is a right connector, and the second connector is a left connector.

[0038] According to another preferred embodiment of the present invention, the gas source includes a nitrogen cylinder.

[0039] According to another preferred embodiment of the present invention, the intake valve is connected to the air source via a filter.

[0040] According to another preferred embodiment of the present invention, the manual dual-channel gas pressure regulator further includes a first three-way connector, which is connected to a first connector, one end of an isolation valve, and the other outlet of a first fine-tuning unit.

[0041] According to another preferred embodiment of the present invention, the manual dual-channel gas pressure regulator further includes a second three-way component, which is connected between the isolation valve and the first three-way component and is connected to the pressure gauge.

[0042] According to another preferred embodiment of the present invention, both the first fine-tuning unit and the second fine-tuning unit are pneumatic fine-tuning pumps.

[0043] Preferably, a filter is provided between the first tee and the first fine-tuning unit. A filter is provided between the adapter and the second fine-tuning unit. See also Figure 1 The adapter is preferably a four-way connector, with one path connected to the isolation valve, one path connected to the second connector, one path connected to the second fine-tuning unit via a filter, and the last path connected to the second fine-tuning unit via another filter.

[0044] According to another preferred embodiment of the present invention, a method for calibrating a piston pressure gauge using the aforementioned manual dual-channel gas pressure regulator is also provided, characterized by comprising the following steps:

[0045] Connect the standard piston gauge and the piston gauge under test to the second connector and the first connector respectively, and connect the nitrogen cylinder to the gas source connector.

[0046] Close the vent valve, open and confirm that the isolation valve is in the open position to keep the first and second air passages connected;

[0047] Slowly open the inlet valve to introduce gas from the nitrogen cylinder into the manual dual-channel gas regulator and piston pressure gauge to increase the pressure. When the pressure approaches the target pressure, close the inlet valve.

[0048] The pressure is finely adjusted using the first and second fine-tuning units until one of the pistons in the standard piston gauge and the piston gauge under test rises to the working position.

[0049] Close the isolation valve and continue to fine-tune the other piston, which has not yet risen to the working position, until it reaches the working position;

[0050] Open the isolation valve to allow the two pistons to be connected for a balance comparison experiment;

[0051] The piston pressure gauge under test is calibrated based on the experimental results.

[0052] According to another preferred embodiment of the present invention, when it is necessary to observe the descent speed of the piston in the experiment, the isolation valve is closed, and the descent speed of each of the two pistons is observed separately to determine whether the two pistons have reached a balanced state, and to add or remove weights.

[0053] According to another preferred embodiment of the present invention, if the position of any piston deviates significantly from its working position during the experiment and needs to be adjusted back to its initial position, the isolation valve is closed, and then the pressure is adjusted by the corresponding fine-tuning pump to change its position, without affecting the other piston.

[0054] This invention can achieve one or more of the following technical effects:

[0055] 1. It helps reduce the time required for piston pressure gauge balancing experiments and makes operation more convenient;

[0056] 2. By creatively combining coarse adjustment with air inflation, dual fine adjustment pumps, and single adjustment with fine adjustment pumps, rapid balance adjustment of the two air paths is achieved, improving the calibration efficiency of the piston pressure gauge.

[0057] 3. It adopts a dual-air-path design, and each path can be independently fine-tuned. After the two pistons are connected through the pressure regulator, they can be isolated from each other at each pressure point using the isolation valve between the two air paths. The piston descent speed of the two piston pressure gauges can be measured separately, which can be used as a standard to judge the balance. The independent fine-tuning pump can fine-tune the working position of the two pistons to avoid affecting the other piston.

[0058] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for improving the calibration efficiency of a piston pressure gauge using a manual dual-channel gas regulator, the manual dual-channel gas regulator comprising: The first air path includes: an inlet valve connected to an air source; a first fine-tuning unit having an inlet and two outlets, the inlet being connected to the inlet valve and one outlet being connected to the atmosphere via a vent valve; a first connector connected to the other outlet; an isolation valve, one end connected to the other outlet and the other end connected to the second air path; and a second air path including a second fine-tuning unit, an adapter, and a second connector, the adapter being connected to the other end of the second fine-tuning unit, the second connector, and the isolation valve, respectively; wherein the first and second connectors are used to connect to the piston pressure gauge under test and a standard piston pressure gauge, characterized in that the method includes the following steps: Connect the standard piston gauge and the piston gauge under test to the second connector and the first connector respectively, and connect the nitrogen cylinder to the gas source connector. Close the vent valve, open and confirm that the isolation valve is in the open position to keep the first and second air passages connected; Coarse inflation adjustment: Slowly open the inlet valve to introduce gas from the nitrogen cylinder into the manual dual-channel gas regulator and piston pressure gauge to increase the pressure. When the pressure approaches the target pressure, close the inlet valve. Dual fine-tuning pump joint adjustment: The pressure is finely adjusted using the first and second fine-tuning units until one of the pistons of the standard piston pressure gauge and the piston pressure gauge under test rises to the working position. Fine-tuning pump single adjustment: Close the isolation valve and continue to fine-tune the other piston, which has not yet risen to the working position, until it reaches the working position; Open the isolation valve to allow the two pistons to be connected for a balance comparison experiment; Calibrate the piston-type pressure gauge under test based on the experimental results; In this process, by combining coarse adjustment with inflation, dual fine adjustment pump adjustment, and single adjustment with fine adjustment pump to quickly balance and adjust one piston and the other piston in the two air paths to the working position, rapid balance adjustment of the two air paths is achieved, thereby improving the calibration efficiency of the piston pressure gauge.

2. The method according to claim 1, characterized in that... The gas source includes nitrogen cylinders.

3. The method according to claim 2, characterized in that... The intake valve is connected to the air source via a filter.

4. The method according to any one of claims 1-3, characterized in that... It also includes a first tee, which is connected to the first connector, one end of the isolation valve and the other outlet of the first fine-tuning unit.

5. The method according to claim 4, characterized in that... It also includes a second three-way valve, which is connected between the isolation valve and the first three-way valve and is connected to the pressure gauge.

6. The method according to claim 5, characterized in that... Both the first and second fine-tuning units are pneumatic fine-tuning pumps.

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