Detection test system of breather valve

Abstract

The utility model relates to the technical field of breather valve detection test, and discloses a breather valve detection test system, which comprises a breather valve test rack and a surge tank, and the surge tank and the breather valve test rack are respectively connected with a first U-shaped pipe water level gauge and a second U-shaped pipe water level gauge through a first pipeline and a second pipeline. The first pipeline is communicated with a third pipeline, the third pipeline is communicated with the breather valve test rack through a first flow meter, the first pipeline and the third pipeline are respectively provided with a first valve, the second pipeline is provided with a second flow meter, and one side of the second flow meter is provided with a second valve installed on the second pipeline. A micromanometer adopted in the prior art is changed into the U-shaped pipe water level gauge, the real condition of pressure can be reflected more accurately, the same U-shaped pipe water level gauge is additionally arranged in front of a breather valve test rack, it is determined that the pressure in front of and behind the test rack must be kept consistent, and the detection precision and accuracy are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of breather valve testing technology, and in particular to a breather valve testing system. Background Technology

[0002] VOCs leakage indicators are now included in the government's strict management requirements. For storage tanks, in order to ensure their safety during operation, breather valves must be installed to facilitate the release of gas during overpressure. However, the released gas will inevitably cause VOCs to be released, polluting the environment. In order to ensure that VOCs are not released from the tank during the breathing process, the breather valve must withstand a certain pressure and must not leak. The regulations stipulate that there must be no leakage at 0.75 times the set pressure of the breather valve, or the leakage value must meet the indicator requirements.

[0003] Currently, there are imported testing devices from foreign manufacturers of breather valves. However, due to the high leakage standards used abroad and the confidentiality of their testing platforms, these devices are not open to leak detection of domestically produced breather valves. Domestic manufacturers produce leak detection platforms, but none of them can simulate actual on-site operating conditions. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a testing system for a breathing valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A testing system for a breathing valve includes a breathing valve test frame and a pressure stabilizing tank. The pressure stabilizing tank and the breathing valve test frame are respectively connected to a first U-tube level gauge and a second U-tube level gauge via a first pipeline and a second pipeline. A third pipeline is connected to the first pipeline, and the third pipeline is connected to the breathing valve test frame via a first flow meter. A first valve is installed on both the first pipeline and the third pipeline. A second flow meter is installed on the second pipeline, and a second valve is installed on one side of the second flow meter on the second pipeline.

[0007] Preferably, the pressure stabilizing tank is also connected to a pre-pressurization pipe, and the other end of the pre-pressurization pipe is connected to the breather valve test frame, and a third valve is provided on the pre-pressurization pipe.

[0008] Preferably, the second valve is located between the second flow meter and the second U-tube level gauge.

[0009] Preferably, the pressure stabilizing tank is also equipped with a pressure regulating valve, a thermometer, and an air power source pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention replaces the micromanometer used in the prior art with a U-tube level gauge, which can more accurately reflect the true pressure situation. In addition, the same U-tube level gauge is added before the breather valve test frame to ensure that the pressure before and after the test bench is consistent, thus ensuring the accuracy and precision of the test. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the composition of a testing system for a breathing valve proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the breather valve test frame structure of a breather valve testing system proposed in this utility model;

[0014] Figure 3 This is a schematic diagram of existing technology.

[0015] In the diagram: 1. Breathing valve test frame; 2. Pressure stabilizing tank; 3. First U-tube water level gauge; 4. Second U-tube water level gauge; 5. First flow meter; 6. First valve; 7. Second flow meter; 8. Second valve; 9. Pre-pressurization pipe; 10. Base; 11. Chamber; 12. Pressure claw; 13. Rotary motor; 14. Telescopic rod; 15. Third valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0017] Reference Figure 1 A testing system for a breathing valve includes a breathing valve test frame 1 and a pressure stabilizing tank 2. The pressure stabilizing tank 2 and the breathing valve test frame 1 are respectively connected to a first U-tube level gauge 3 and a second U-tube level gauge 4 via a first pipeline and a second pipeline. A third pipeline is connected to the first pipeline, and the third pipeline is connected to the breathing valve test frame 1 via a first flow meter 5. A first valve 6 is provided on both the first pipeline and the third pipeline. A second flow meter 7 is provided on the second pipeline, and a second valve 8 is installed on one side of the second flow meter 7 on the second pipeline.

[0018] When using this system, the breathing valve to be tested is installed on the breathing valve test rack 1. The breathing valve is pressurized through the pressure stabilizing tank 2, and the system tests whether the breathing valve leaks (the second flow meter 7 is used for testing). This system uses a micromanometer (such as those used in existing technologies) Figure 3The pressure gauge (as shown) was replaced with a U-tube level gauge, which can more accurately reflect the actual pressure. In addition, the same U-tube level gauge (i.e., the first U-tube level gauge 3) was added before the breather valve test frame 1 to ensure that the pressure before and after the breather valve test frame 1 is consistent, thus ensuring the accuracy and precision of the test.

[0019] In this embodiment, a pre-pressurization pipe 9 is also connected to the pressure stabilizing tank 2, and the other end of the pre-pressurization pipe 9 is connected to the breathing valve test frame 1. A third valve 15 is provided on the pre-pressurization pipe 9. Before detecting leakage of the breathing valve, the first valves 6 before and after the first flow meter 5 are closed. The breathing valve test frame 1 is pressurized to the pressure value to be detected using this line. Since the first flow meter 5 is not directly used for pressurization, the flow rate detection during the internal pressurization of the breathing valve will not be affected.

[0020] In this embodiment, the second valve 8 is located between the second flow meter 7 and the second U-tube level gauge 4, so that the flow meter at the exhaust port can still detect leakage when there is leakage in the second valve 8, and the flow meter at the end should normally be 0.

[0021] In this embodiment, the pressure stabilizing tank 2 is also equipped with a pressure regulating valve (used to adjust the pressure required by the breathing valve), a thermometer, and an air power source pipe.

[0022] Data from the first flow meter 5 and the second flow meter 7 are collected in real time and fed into the PLC. The leakage value is automatically calculated based on the time, and a leakage detection report is automatically generated after the test. Example

[0023] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that:

[0024] In this embodiment, the test frame includes a base 10, a chamber 11 opened on the top of the base 10, and a pressure claw 12 structure disposed on the top of the base 10. The pressure claw 12 structure includes a rotary motor 13 installed on the outer periphery of the top of the base 10, a telescopic rod 14 installed on the drive end of the rotary motor 13, and a pressure claw 12 installed on the other end of the telescopic rod 14.

[0025] In this embodiment, the ends of the pressure claw 12 and the telescopic rod 14 are connected by a torsion spring and a rotating mechanism.

[0026] It should be noted that after the tested breathing valve is placed on the base 10, it forms a seal with the chamber 11 through the sealing gasket.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A breathing apparatus valve testing system comprising a breathing apparatus valve test stand and a pressure stabilising tank, characterised in that: The pressure stabilizing tank and the breathing valve test bench are connected with first and second U-shaped tube water level gauges through first and second pipelines respectively, a third pipeline is arranged in communication on the first pipeline, the third pipeline is communicated with the breathing valve test bench through a first flow meter, first valves are arranged on the first and third pipelines, a second flow meter is arranged on the second pipeline, and a second valve is arranged on the second pipeline on one side of the second flow meter.

2. A respiratory valve testing system according to claim 1, wherein: A pre-charging pipeline is further arranged in communication on the pressure stabilizing tank, the other end of the pre-charging pipeline is communicated with the breathing valve test bench, and a third valve is arranged on the pre-charging pipeline.

3. A respiratory valve testing system according to claim 1, wherein: The second valve is located between the second flow meter and the second U-shaped tube water level gauge.

4. A respiratory valve testing system according to claim 2, wherein: A pressure regulating valve, a thermometer and an air power source pipeline are further arranged on the pressure stabilizing tank.

5. A respiratory valve testing system according to claim 1, wherein: The breathing valve test bench comprises a base, a cavity formed in the top of the base and a pressing jaw structure arranged on the top of the base, the pressing jaw structure comprises a rotary motor mounted on the periphery of the top of the base, an extension rod mounted on the driving end of the rotary motor and a pressing jaw mounted on the other end of the extension rod.

6. A respiratory valve testing system according to claim 5, wherein: The end of the pressing jaw and the extension rod are connected through a torsional spring and a rotating joint.

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