Medium conversion device for gas-liquid alternating pressure pulse test

Abstract

The utility model relates to a gas-liquid alternating pressure pulse test medium conversion device which comprises a valve body and a valve cover, the valve cover is fixedly connected with the valve body through a fixing bolt, a gas inlet pipeline is arranged in the center of the valve cover, and the valve body is provided with a test medium inflow pipeline and a test medium outflow pipeline. The test medium inflow pipeline is arranged below the test medium outflow pipeline, the test medium outflow pipeline is communicated with the test medium inflow pipeline through a pressure circular cavity, the pressure circular cavity is provided with a valve-like cylinder, an upper opening of the valve body is connected with an annular positioning bayonet, and the upper portion of the valve-like cylinder is connected with the annular positioning bayonet in a sliding mode. And the upper part of the test medium outflow pipeline is provided with an air inlet branch which is communicated with the annular positioning bayonet and an air inlet pipeline of the valve cover. The position of the opening / closing state of the similar valve column body is controlled through different pressures of inflow media, and the purpose of instantaneous conversion between different media such as gas and liquid can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medium conversion, and in particular relates to a medium conversion device for a gas-liquid alternating pressure pulse test. Background Art

[0002] The pressure pulse test can simulate factors such as pressure, impact frequency, internal and external temperature, etc. The pressure pulse test data plays an important role in discovering problems in the product development process. The pressure tested in the pressure pulse test depends on the actual working pressure of the accessories. Usually the test pressure is 1.0 to 1.3 times the normal working condition of the product. In some important fields, the test pressure will be more stringent and can reach 1.5 times or even higher than the normal working pressure. There are also some products in some fields that need to work under different high and low pressure conditions, so it is necessary to alternate between high and low levels to simulate the corresponding working conditions, so as to achieve the purpose of the test.

[0003] Pulse tests are currently diversified. Media including gas, water, oil, etc. can also be tested simultaneously with two media. Traditional pressure pulse test equipment can achieve mutual conversion between high and low levels within a certain range, but too large a test level difference cannot be achieved with only one test medium. Currently, there is no equipment that can meet the pressure pulse test of alternating pulses between different pressures, and there is no device that can perform instantaneous conversion between different media such as gas and liquid. The field of pulse test technology urgently needs to fill the technical gap in gas-liquid medium conversion. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provides a gas-liquid alternating pressure pulse test medium conversion device, which controls the opening / closing state of a valve column by different pressures of the flowing medium to achieve the conversion purpose of different media.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a gas-liquid alternating pressure pulse test medium conversion device, including a valve body and a valve cover, the valve cover is fixedly connected to the valve body by fixing bolts, an air inlet pipeline is arranged in the center of the valve cover, the valve body is provided with a test medium inlet pipeline and a test medium outflow pipeline, the test medium inlet pipeline is arranged below the test medium outflow pipeline, the test medium outflow pipeline is connected with the test medium inflow pipeline through a pressure circular cavity, a valve-like column is arranged in the pressure circular cavity, an annular positioning bayonet is connected to the upper opening of the valve body, the upper part of the valve-like column is slidably connected to the annular positioning bayonet, and an air inlet branch is arranged on the upper part of the test medium outflow pipeline, which is connected with the annular positioning bayonet and the air inlet pipeline of the valve cover.

[0006] Furthermore, the cross-section of the valve-like column is stepped, and a positioning limiter is fixedly connected to the upper cylinder.

[0007] Furthermore, a sealing gasket is provided at the bottom of the valve-like column.

[0008] Furthermore, a groove is provided on the circumference of the annular positioning bayonet, and a rubber sealing ring is placed in the groove.

[0009] Beneficial effect: Compared with the prior art, the utility model can achieve the purpose of instantaneous conversion between different media such as gas and liquid by controlling the position of the open / closed state of the valve column by different pressures of the flowing medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] In the figure: 1. fixing bolt, 2. gas inlet pipeline, 3. valve-like cylinder, 4. annular positioning bayonet, 5. positioning limiter, 6. test medium outflow pipeline, 6-1, air inlet branch, 7. test medium inflow pipeline, 8. valve body, 9. valve cover, 10. pressure circular cavity, 11. rubber sealing ring, 12. sealing gasket. DETAILED DESCRIPTION

[0012] The following is a detailed description of the specific implementation method provided according to the utility model in combination with the preferred embodiment: See the accompanying drawings for details. This embodiment provides a gas-liquid alternating pressure pulse test medium conversion device, including a valve body 8 and a valve cover 9, the valve cover is fixed to the valve body by a fixing bolt 1, a gas inlet pipeline 2 is provided in the center of the valve cover, the valve body is provided with a test medium inlet pipeline 7 and a test medium outflow pipeline 6, the test medium inflow pipeline is placed below the test medium outflow pipeline, the test medium outflow pipeline is connected to the test medium inflow pipeline through a pressure circular cavity 10, a valve-like column 3 is provided in the pressure circular cavity, the upper opening of the valve body is connected to an annular positioning bayonet 4, the upper part of the valve-like column is slidably connected to the annular positioning bayonet, and the upper part of the test medium outflow pipeline is provided with an intake branch 6-1 connected to the annular positioning bayonet and the intake pipeline of the valve cover.

[0013] The preferred solution of this embodiment is that the cross-section of the valve-like column is stepped, and the upper cylinder is fixed with a positioning stopper 5. The position of the positioning stopper is adjusted according to the thickness of the annular positioning bayonet, that is, the height of the upper cylinder of the valve-like column entering the annular positioning bayonet.

[0014] The preferred solution of this embodiment is that a groove is provided on the circumference of the annular positioning bayonet, and a rubber sealing ring 11 is placed in the groove to ensure the sealing of the pressure circular cavity.

[0015] The preferred solution of this embodiment is that a sealing gasket 12 is provided at the bottom of the valve-like column to ensure that after the oil supply pressure is cut off during the low-level test, the test medium flows out of the pipeline and the pressure cavity is sealed when the gas pressure is supplied.

[0016] Working process

[0017] During the implementation of the gas-liquid alternating pressure pulse test using this device,

[0018] 1. The gas source supplies gas constantly, providing a constant pressure of, for example, 0.6Mpa. The gas enters the device through the gas inlet pipeline 2, which is in an open state relative to the inflowing gas. The gas enters the test medium outflow pipeline 6 through the inlet branch 6-1 and flows out. At this time, the gas is supplied with pressure for the pressure pulse test, that is, a low-level pressure pulse test is performed;

[0019] 2. When the oil supply pressure is turned on, the medium oil enters the device through the test medium inflow pipeline 7, providing a pressure of, for example, 20Mpa. At this time, the pressure below the device is much greater than the pressure above the device. At this time, the valve-like column 3 moves upward under the action of the liquid pressure and the positioning limiter, and the device is in a closed state relative to the upper air source. The oil flows out of the device through the test medium outflow pipeline to provide pressure for the medium oil, that is, a high-level pressure pulse test is performed;

[0020] 3. When the low-level test is performed again, the oil supply pressure is cut off. At this time, the device moves downward under the action of the upper gas pressure and the positioning limiter 5, and is in an open state relative to the gas, so the gas pressure is supplied again;

[0021] 4. Repeat the above steps to realize the gas-liquid alternating pressure pulse test through this medium conversion device.

[0022] The detailed description of a gas-liquid alternating pressure pulse test medium conversion device with reference to the above embodiment is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope. Therefore, changes and modifications without departing from the overall concept of the utility model should fall within the scope of protection of the utility model.

Claims

1. A gas-liquid alternating pressure pulse test medium conversion device, characterized by: It includes a valve body and a valve cover, the valve cover is fixedly connected to the valve body by fixing bolts, an air inlet pipeline is arranged in the center of the valve cover, and the valve body is provided with a test medium inlet pipeline and a test medium outflow pipeline, the test medium inlet pipeline is arranged below the test medium outflow pipeline, the test medium outflow pipeline is connected with the test medium inlet pipeline through a pressure circular cavity, a valve-like column is arranged in the pressure circular cavity, the upper opening of the valve body is connected with an annular positioning bayonet, the upper part of the valve-like column is slidably connected with the annular positioning bayonet, and an air inlet branch which is connected with the annular positioning bayonet and the air inlet pipeline of the valve cover is arranged on the upper part of the test medium outflow pipeline.

2. The gas-liquid alternating pressure pulse test medium conversion device according to claim 1 is characterized in that: The cross-section of the valve-like column is in a stepped shape, and a positioning limiter is fixedly connected to the upper cylinder.

3. The gas-liquid alternating pressure pulse test medium conversion device according to claim 1 or 2, characterized in that: A sealing gasket is arranged at the bottom of the valve column.

4. The gas-liquid alternating pressure pulse test medium conversion device according to claim 1 is characterized in that: A clamping groove is arranged on the circumference of the annular positioning bayonet, and a rubber sealing ring is arranged in the clamping groove.

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