Mechanical gas pressure detection loop

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By designing a mechanical gas pressure detection circuit including fast exhaust valves, pressure gauges, check-way valves and vacuum pressure gauges, the problem of unknown positive or negative pressure gas pressure measurement is solved, and accurate and reliable measurement and environment are achieved. Improved adaptability.

CN222528825UActive Publication Date: 2025-02-25SMC CHINA +3

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202420162851.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-01-23
Publication Date: 2025-02-25
Estimated Expiration: 2034-01-23

AI Technical Summary

Technical Problem

The prior art is difficult to accurately and reliably measure the gas pressure of unknown positive or negative pressure in the gas circuit without using power-on equipment, and a single pressure gauge is prone to abnormal readings or damage to the meter body.

Method used

A mechanical gas pressure detection circuit is designed, including a fast exhaust valve, pressure gauge, a one-way valve and a vacuum pressure gauge. Through the design of the fast exhaust valve and a one-way valve, the positive pressure gas automatically flows to the pressure gauge, and the negative pressure gauge is achieved. The pressurized gas flows automatically to the vacuum pressure gauge.

Benefits of technology

It realizes accurate and reliable measurement of the pressure of the gas circuit to be measured without using the power-on equipment, avoids abnormal pressure gauge readings and damage to the meter body, expands the gas pressure measurement range, improves environmental adaptability, and has a simple structure. Easy to use.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN222528825U_ABST

Patent Text Reader

Abstract

The utility model discloses a mechanical gas pressure detection loop. The mechanical gas pressure detection loop comprises a quick exhaust valve, a pressure gauge, a one-way valve and a vacuum pressure gauge. A first air outlet of the quick exhaust valve is connected with a pressure gauge; an air inlet of the one-way valve is connected with the vacuum manometer; an air inlet of the quick exhaust valve and an air outlet of the one-way valve can be connected to the air path, so that positive-pressure air in the air path can flow to the pressure gauge, or negative-pressure air in the air path can flow to the vacuum pressure gauge. According to the mechanical gas pressure detection loop, the pressure of a gas circuit to be detected is accurately and reliably measured under the condition that no electrifying equipment is used, abnormal reading of a pressure gauge or damage to a gauge body caused by the fact that a single pressure gauge is connected rationally is avoided, meanwhile, wrong measurement is also avoided, the gas pressure measurement range is expanded, and the working efficiency is improved. And the environmental adaptability of gas pressure detection is improved.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the field of pressure detection equipment, in particular to a mechanical gas pressure detection circuit. Background Art

[0002] The existing pressure gauges are widely used, almost in all industrial processes and scientific research fields. When measuring gas pressure in a gas line, positive pressure gauges or vacuum pressure gauges are usually selected for measurement, or digital pressure gauges are used for measurement.

[0003] Although digital pressure gauges can test positive pressure and vacuum pressure at the same time, they have the limitation of needing to be powered on compared to traditional pressure gauges, and cannot be used in some special environments. A single mechanical pressure gauge can only measure positive pressure or vacuum pressure, and cannot measure both at the same time. Utility Model Content

[0004] In order to enrich the product categories of gas pressure detection mechanisms and increase the selection space of gas pressure detection methods, the utility model provides a mechanical gas pressure detection circuit.

[0005] In a first aspect, an embodiment of the utility model provides a mechanical gas pressure detection circuit, including a quick exhaust valve, a pressure gauge, a one-way valve and a vacuum pressure gauge;

[0006] The first air outlet of the quick exhaust valve is connected to the pressure gauge;

[0007] The air inlet of the one-way valve is connected to the vacuum pressure gauge;

[0008] The air inlet of the quick exhaust valve and the air outlet of the one-way valve can both be connected to an air circuit so that the positive pressure gas in the air circuit can flow to the pressure gauge, or so that the negative pressure gas in the air circuit can flow to the vacuum pressure gauge.

[0009] In one or some optional embodiments, the mechanical gas pressure detection circuit further includes a speed control valve;

[0010] The air outlet of the speed control valve is connected between the one-way valve and the vacuum pressure gauge.

[0011] In one or some optional embodiments, an air inlet of the speed control valve is connected to the atmosphere so that air can enter the vacuum pressure gauge.

[0012] In one or some optional embodiments, the speed control valve is provided with an intake speed regulating mechanism;

[0013] The air intake speed adjustment mechanism is capable of adjusting the air intake speed of the air intake port of the speed control valve.

[0014] In one or some optional embodiments, the air inlet and the air outlet of the speed control valve are both kept open.

[0015] In one or some optional embodiments, the second gas outlet of the quick exhaust valve is connected to the atmosphere, so that the gas in the pressure gauge can be discharged from the second gas outlet of the quick exhaust valve.

[0016] In one or some optional embodiments, when the first air outlet of the quick exhaust valve is open, the second air outlet of the quick exhaust valve is closed.

[0017] In one or some optional embodiments, the pressure gauge is a mechanical pressure gauge.

[0018] In one or some optional embodiments, the vacuum pressure gauge is a mechanical vacuum pressure gauge.

[0019] In one or some optional embodiments, the mechanical gas pressure detection circuit further includes a three-way pipe;

[0020] The three-way pipe is respectively connected to the air inlet of the quick exhaust valve and the air outlet of the one-way valve.

[0021] The beneficial effects of the above technical solution provided by the embodiment of the utility model include at least:

[0022] The mechanical gas pressure detection circuit provided by the embodiment of the utility model connects the first air outlet of the quick exhaust valve to the pressure gauge, and connects the air inlet of the one-way valve to the vacuum pressure gauge. When it is unknown whether the gas pressure in the gas circuit to be tested is positive pressure or negative pressure, it can ensure that the positive pressure gas automatically flows from the quick exhaust valve to the pressure gauge, and ensure that the negative pressure gas automatically flows from the one-way valve to the vacuum pressure gauge. The mechanical gas pressure detection circuit can accurately and reliably measure the pressure of the gas circuit to be tested without using an energized device, avoiding abnormal pressure gauge readings or damage to the gauge body caused by hastily connecting a single pressure gauge, while also avoiding mismeasurement, expanding the gas pressure measurement range, and improving the environmental adaptability of gas pressure detection. It has a simple structure and is easy to use, which is conducive to improving economic benefits.

[0023] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0024] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 A schematic diagram of the structural principle of a mechanical gas pressure detection circuit provided in an embodiment of the utility model.

[0027] In the figure:

[0028] 1. Quick exhaust valve; 2. Pressure gauge; 3. Check valve; 4. Vacuum pressure gauge; 5. Speed control valve; 6. Gas circuit to be tested. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "rear" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.

[0032] The inventors have found that when the positive and negative pressures in the gas circuit to be measured are unknown or the positive and negative pressures in the gas circuit are mixed, it is difficult to accurately and reliably measure the pressure in the gas circuit without using powered equipment. Rashly connecting a single pressure gauge may result in abnormal pressure gauge readings or damage to the gauge body.

[0033] Based on this, the utility model provides a mechanical gas pressure detection circuit, which is described in detail below through specific embodiments.

[0034] Example

[0035] The utility model embodiment provides a mechanical gas pressure detection circuit, referring to Figure 1 As shown, it includes a quick exhaust valve 1, a pressure gauge 2, a one-way valve 3 and a vacuum pressure gauge 4;

[0036] The first air outlet of the quick exhaust valve 1 is connected to the pressure gauge 2;

[0037] The air inlet of the one-way valve 3 is connected to the vacuum pressure gauge 4;

[0038] The air inlet of the quick exhaust valve 1 and the air outlet of the one-way valve 3 can both be connected to the air circuit so that the positive pressure gas in the air circuit can flow to the pressure gauge 2, or so that the negative pressure gas in the air circuit can flow to the vacuum pressure gauge 4.

[0039] In this embodiment, the quick exhaust valve 1 and the one-way valve 3 can be connected by a three-way pipe (not shown in the figure), and the two pipe ends of the three-way pipe are respectively connected to the quick exhaust valve 1 and the one-way valve 3, and the other pipe end can be connected to the gas circuit 6 to be tested, so as to connect the mechanical gas pressure detection circuit to the gas circuit 6 to be tested, and make the air inlet of the quick exhaust valve 1 and the air outlet of the one-way valve 3 connected to the gas circuit 6 to be tested respectively, so that the positive pressure gas flows to the pressure gauge 2, or the negative pressure gas flows to the vacuum pressure gauge 4, so as to measure the gas pressure in the gas circuit 6 to be tested when the positive and negative pressures of the gas in the gas circuit 6 to be tested are unknown.

[0040] The mechanical gas pressure detection circuit provided by the embodiment of the utility model connects the first gas outlet of the quick exhaust valve 1 to the pressure gauge 2, and connects the gas inlet of the one-way valve 3 to the vacuum pressure gauge 4. When it is unknown whether the gas pressure in the gas circuit 6 to be tested is positive pressure or negative pressure, it can ensure that the positive pressure gas automatically flows from the quick exhaust valve 1 to the pressure gauge 2, and ensure that the negative pressure gas automatically flows from the one-way valve 3 to the vacuum pressure gauge 4. The mechanical gas pressure detection circuit can accurately and reliably measure the pressure of the gas circuit 6 to be tested without using an energized device, avoiding abnormal pressure gauge readings or damage to the gauge body caused by hastily connecting a single pressure gauge, and also avoiding mismeasurement; the mechanical gas pressure detection circuit expands the gas pressure measurement range, improves the environmental adaptability of gas pressure detection, and has a simple structure and is easy to use, which is conducive to improving economic benefits.

[0041] In this embodiment, refer to Figure 1As shown, the air inlet of the quick exhaust valve 1 is connected to the gas circuit 6 to be tested, and the first air outlet of the quick exhaust valve 1 is connected to the pressure gauge 2. The positive pressure gas in the gas circuit 6 to be tested can enter the pressure gauge 2 through the air inlet and the first air outlet of the quick exhaust valve 1, so that the pressure value of the positive pressure gas in the gas circuit 6 to be tested is detected by the pressure gauge 2. The second air outlet of the quick exhaust valve 1 is connected to the atmosphere. When gas enters the air inlet of the quick exhaust valve 1, the valve core of the quick exhaust valve 1 will block the second air outlet of the quick exhaust valve 1. When the air inlet of the quick exhaust valve 1 stops taking in air, the valve core of the quick exhaust valve 1 moves to release the blockage of the second air outlet of the quick exhaust valve 1, and the first air outlet and the second air outlet of the quick exhaust valve 1 are connected. Therefore, when the mechanical gas pressure detection circuit is connected to the gas circuit 6 to be tested, if the gas in the gas circuit 6 to be tested is positive-pressure gas, after the positive-pressure gas enters the pressure gauge 2, the pressure gauge 2 displays the pressure value of the positive-pressure gas, that is, the detection of the gas pressure in the gas circuit 6 to be tested is completed. At this time, the mechanical gas pressure detection circuit can be separated from the gas circuit. After separation, the positive-pressure gas in the pressure gauge 2 can be automatically discharged through the second gas outlet of the quick exhaust valve 1, so that the pressure gauge 2 automatically returns to zero, thereby improving the automation degree and convenience of gas pressure detection.

[0042] In a specific embodiment, referring to Figure 1 As shown, the mechanical gas pressure detection circuit may also include a speed control valve 5. The air outlet of the speed control valve 5 is connected to the air inlet of the one-way valve 3 and the pressure gauge 2 respectively. Specifically, the air outlet of the speed control valve 5 can be connected to the one-way valve 3 and the pressure gauge 2 respectively through a three-way joint (not shown in the figure), and the air inlet of the speed control valve 5 is connected to the atmosphere, so that air can enter the vacuum pressure gauge 4 and between the vacuum pressure gauge 4 and the one-way valve 3 from the air inlet of the speed control valve 5. When the mechanical gas pressure detection circuit is connected to the gas circuit 6 to be tested, if the gas in the gas circuit 6 to be tested is negative pressure gas, the gas between the one-way valve 3 and the vacuum pressure gauge 4 flows to the gas circuit under the action of negative pressure, and the vacuum pressure gauge 4 displays the pressure value of the negative pressure gas, that is, the detection of the gas pressure in the gas circuit 6 to be tested is completed. At this time, the mechanical gas pressure detection circuit can be separated from the gas circuit. After separation, the air in the atmosphere enters the vacuum pressure gauge 4 through the speed control valve 5, so that the vacuum pressure gauge 4 returns to zero.

[0043] In a specific embodiment, in order to realize the automatic zeroing of the vacuum pressure gauge 4, the speed control valve 5 is kept in a normally open state. By reasonably setting the air intake speed of the speed control valve 5, the zeroing speed of the vacuum pressure gauge 4 can be controlled. In order to avoid errors in the pressure detection of the negative pressure gas in the gas circuit, the opening of the speed control valve 5 is kept at a relatively small state; further, in the actual measurement process, the size of the small error that can be caused by the normal opening of the speed control valve 5 can be measured in advance, and after the measurement of the vacuum pressure gauge 4 is completed, the pressure value measured by the vacuum pressure gauge 4 is subtracted from the error measured in advance. By keeping the speed control valve 5 in a normally open state, the automatic zeroing of the vacuum pressure gauge 4 is realized, which improves the automation degree and convenience of gas pressure detection.

[0044] In a specific embodiment, the speed control valve 5 is provided with an air intake speed regulating mechanism (not shown in the figure), and the air intake speed regulating mechanism can adjust the opening of the speed control valve 5, thereby adjusting the air intake speed of the speed control valve 5. In practical applications, the zeroing speed of the vacuum pressure gauge 4 and the error size of the measured vacuum pressure value can be reasonably set by adjusting the air intake speed regulating mechanism. If the accuracy requirement is high, the speed control valve 5 can be closed by adjusting the air intake speed regulating mechanism during gas pressure detection, and the speed control valve 5 can be opened again after the detection is completed to return the vacuum pressure gauge 4 to zero. Therefore, by adjusting the speed control valve 5, different measurement accuracy requirements and different zeroing speeds of the vacuum pressure gauge 4 can be met, and the operation is flexible and the applicability is strong.

[0045] In a specific embodiment, the pressure gauge 2 is a mechanical pressure gauge, and the vacuum pressure gauge 4 is a mechanical vacuum pressure gauge that does not need to be powered on, so that the mechanical gas pressure detection circuit can accurately and reliably measure the pressure of the gas path 6 to be tested without using powered equipment.

[0046] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A mechanical gas pressure detection circuit, characterized in that: Includes quick exhaust valve, pressure gauge, check valve and vacuum pressure gauge; The first air outlet of the quick exhaust valve is connected to the pressure gauge; The air inlet of the one-way valve is connected to the vacuum pressure gauge; The air inlet of the quick exhaust valve and the air outlet of the one-way valve can both be connected to an air circuit so that the positive pressure gas in the air circuit can flow to the pressure gauge, or so that the negative pressure gas in the air circuit can flow to the vacuum pressure gauge.

2. The mechanical gas pressure detection circuit according to claim 1, characterized in that: Also included is a speed control valve; The air outlet of the speed control valve is connected between the one-way valve and the vacuum pressure gauge.

3. The mechanical gas pressure detection circuit according to claim 2, characterized in that: The air inlet of the speed control valve is connected to the atmosphere so that air can enter the vacuum pressure gauge.

4. The mechanical gas pressure detection circuit according to claim 3, characterized in that: The speed control valve is provided with an air intake speed regulating mechanism; The air intake speed adjustment mechanism is capable of adjusting the air intake speed of the air intake port of the speed control valve.

5. The mechanical gas pressure detection circuit according to claim 4, characterized in that: The air inlet and the air outlet of the speed control valve are both kept in an open state.

6. The mechanical gas pressure detection circuit according to any one of claims 1 to 5, characterized in that: The second gas outlet of the quick exhaust valve is connected to the atmosphere, so that the gas in the pressure gauge can be discharged from the second gas outlet of the quick exhaust valve.

7. The mechanical gas pressure detection circuit according to claim 6, characterized in that: When the first air outlet of the quick exhaust valve is in an open state, the second air outlet of the quick exhaust valve is closed.

8. The mechanical gas pressure detection circuit according to claim 1, characterized in that: The pressure gauge is a mechanical pressure gauge.

9. The mechanical gas pressure detection circuit according to claim 1, characterized in that: The vacuum pressure gauge is a mechanical vacuum pressure gauge.

10. The mechanical gas pressure detection circuit according to claim 1, characterized in that: Also includes a tee pipe; The three-way pipe is respectively connected to the air inlet of the quick exhaust valve and the air outlet of the one-way valve.