Airtightness detection device for hydrostatic level casing

Abstract

The utility model provides a hydrostatic level casing air tightness detection device which comprises a first valve, a second valve, a third valve and a fourth valve, one end of the first valve, one end of the second valve, one end of the third valve and one end of the fourth valve are connected with the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole through four connectors respectively; and the other end of the third valve and the other end of the fourth valve are respectively connected with a pressurizing assembly through a connecting pipeline. The air pump is started, then the third valve or the fourth valve is opened, the air pump introduces air into the liquid cavity or the back pressure cavity, a worker can check the reading of the pressure gauge, if the reading of the pressure gauge continuously drops, that is, the air tightness has a problem, and if the air tightness is normal and no leakage exists, the pressure reading is kept constant within a certain period of time; therefore, air tightness detection can be quickly carried out on the incoming material of the hydrostatic level casing.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors and liquid level sensors of static level gauges, and particularly relates to an airtightness detection device for the housing of a static level gauge. Background Technique

[0002] A static level gauge is a sensor that measures the change in liquid level pressure based on the principle of a silicon piezoresistive pressure sensor and is applied to liquid level and settlement monitoring scenarios. During the production and inspection of static level gauges, it is necessary to calibrate the air pressure or pressure of raw material parts and finished products. Therefore, when there is a fault in the airtightness of the finished product, the troubleshooting process is complex and the troubleshooting efficiency is low. Once the airtightness of the housing is insufficient, external environmental factors such as humidity, dust, and even slight pressure fluctuations may interfere with the measurement results, leading to data deviation, and in severe cases, it may even damage the internal sensitive components.

[0003] Traditional airtightness detection methods rely on manual visual inspection, which is subjective, inefficient, and difficult to accurately locate tiny leaks. Moreover, the airtightness detection equipment on the market is often highly versatile and not optimized for the special structure and high-precision requirements of static level gauges, with limited automation and intelligent detection capabilities. Content of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide an airtightness detection device for the housing of a static level gauge that can quickly inspect and improve efficiency.

[0005] The utility model provides the following technical solution: an airtightness detection device for the housing of a static level gauge, wherein the housing of the static level gauge includes a housing of the static level gauge, a liquid cavity and a back pressure cavity formed by partitioning inside the housing of the static level gauge, a mounting hole for installing a pressure-sensitive core body provided inside the housing of the static level gauge, and a first connection hole, a second connection hole, a third connection hole, and a fourth connection hole respectively provided on the housing of the static level gauge. The first connection hole and the second connection hole are communicated with the liquid cavity, and the third connection hole and the fourth connection hole are communicated with the back pressure cavity. It is characterized in that the airtightness detection device includes a first valve, a second valve, a third valve, and a fourth valve. One ends of the first valve, the second valve, the third valve, and the fourth valve are respectively connected to the first connection hole, the second connection hole, the third connection hole, and the fourth connection hole through four connectors. The other ends of the third valve and the fourth valve are respectively connected to a pressurizing component through a connecting pipe. A sealing tooling is arranged in the mounting hole, and the sealing tooling is used for sealing the mounting hole.

[0006] Further, the four connections are respectively a first pagoda joint, a second pagoda joint, a third pagoda joint, and a fourth pagoda joint. One ends of the first valve, the second valve, the third valve, and the fourth valve are respectively connected to the first connection hole, the second connection hole, the third connection hole, and the fourth connection hole through the first pagoda joint, the second pagoda joint, the third pagoda joint, and the fourth pagoda joint.

[0007] Further, the pressurizing assembly includes a pressure gauge, an air pump, and a pressure indicator. The other ends of the third valve and the fourth valve are connected to the pressure gauge through a connection pipe. The output end of the air pump is connected to the pressure gauge, and the pressure indicator is arranged on the pressure gauge.

[0008] Further, the pressure gauge is a float-type pressure gauge.

[0009] Further, the first valve, the second valve, the third valve, and the fourth valve are straight-through valves.

[0010] Further, the sealing tooling includes a plug block filled in the installation hole, a sealing ring arranged on the outer wall of the plug block, and several connecting rods arranged on the plug block. The sealing ring is in interference fit with the side wall of the installation hole.

[0011] The beneficial effects of this utility model are as follows: By starting the air pump and then opening the third valve or the fourth valve, the air pump introduces gas into the liquid chamber or the back pressure chamber. The staff can check the reading of the pressure indicator. If the reading of the pressure indicator continuously decreases, that is, there is a problem with airtightness. If the airtightness is normal and there is no leakage, the pressure reading remains constant within a certain period of time. Thus, the airtightness of the incoming shell of the static level can be quickly detected. Through the test tooling, rapid inspection can be achieved, improving efficiency. Further, through the above airtightness test, defects such as cracks and drilling sand holes can be screened out, and the detection rate of quality hazards is high. In addition, using a pure water water tank for testing, the detection effect is intuitive. At the same time, a pressure indicator is designed to observe the air pressure maintenance situation. If there is an airtightness problem, the reading of the pressure indicator will continuously decrease, and the airtightness can be intuitively judged further. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of this utility model.

[0013] Figure 2 is a three-dimensional structural schematic diagram of the static level of this utility model.

[0014] Figure 3 is a three-dimensional structural schematic diagram of the sealing tooling of this utility model.

[0015] The reference signs in the drawings are: 1 - first valve, 2 - first tower joint, 3 - sealing tooling, 3a - plugging block, 3b - sealing ring, 3c - connecting rod, 4 - static level housing, 5 - second tower joint, 6 - second valve, 7 - third tower joint, 8 - fourth tower joint, 9 - third valve, 10 - fourth valve, 11 - connecting pipe, 12 - float type manometer, 13 - air pump, 14 - water tank, 15 - pressure gauge, 16 - pressure sensitive core, 17 - first liquid pipeline, 18 - fifth tower joint, 19 - sixth tower joint, 20 - second liquid pipeline, 21 - first back pressure pipe pipeline, 22 - seventh tower joint, 23 - eighth tower joint, 24 - second back pressure pipe pipeline, 25 - static level output cable, 26 - core output cable, 27 - back pressure vent, 28 - acquisition board, 29 - first connection hole, 30 - second connection hole, 31 - third connection hole, 32 - fourth connection hole. Detailed implementation manners

[0016] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model will be thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] As Figure 2The static level is shown, including: a static level housing, a first liquid pipeline 17, a fifth pagoda connector 18, a sixth pagoda connector 19, a second liquid pipeline 20, a first back pressure pipe pipeline 21, a seventh pagoda connector 22, an eighth pagoda connector 23, a second back pressure pipe pipeline 24, a static level output cable 25, a core output cable 26, a back pressure vent 27 and an acquisition board 28, wherein the static level housing includes: a static level housing 4, a liquid cavity and a back pressure cavity separated and formed inside the static level housing 4, an installation hole for installing a pressure sensitive core 16 arranged inside the static level housing 4, and a first connecting hole 29, a second connecting hole 30, a third connecting hole 31 and a fourth connecting hole 32 respectively arranged on the static level housing 4, the first connecting hole 29 and the second connecting hole 30 are connected to the liquid cavity, and the third connecting hole 31 and the fourth connecting hole 32 are connected to the back pressure cavity.

[0020] Specifically, the static level is a sensor based on the principle of silicon piezoresistive pressure sensor, which measures the change of liquid level pressure and is used in liquid level and sedimentation monitoring scenarios. The liquid cavity is used to directly bear the liquid pressure, and the back pressure cavity is connected to the atmosphere through the first back pressure pipe line 21 or the second back pressure pipe line 24 in actual use. The static level housing 4 is produced by mechanical processing. The first liquid pipeline 17 is connected to the first connecting hole 29 through the fifth pagoda joint 18, and the second liquid pipeline 20 is connected to the second connecting hole 30 through the sixth pagoda joint 19. In actual use, the first liquid pipeline 17 and the second liquid pipeline 20 are connected to the water tank 14 and other static levels. The first back pressure pipe pipeline 21 is connected to the third connecting hole 31 through the seventh pagoda joint 22. The second back pressure pipe line 24 is connected to the fourth connecting hole 32 through the eighth pagoda joint 23. In actual use, it is connected to the atmosphere through the first back pressure pipe line 21 and the second back pressure pipe line 24. A pressure sensitive core 16 is arranged at the mounting hole inside the static level housing 4. A plurality of core output cables 26 are arranged on the pressure sensitive core 16. A back pressure vent 27 is arranged at the mounting hole. A small hole (not shown in the figure) for the core output cable 26 to pass through is also arranged at the mounting hole. A collection board 28 is arranged in the back pressure cavity of the static level housing 4. The collection board 28 is connected to the core output cable 26. The collection board 28 is provided with a static level output cable 25. One end of the static level output cable 25 passes through the side wall of the back pressure cavity and is led out to the outside.

[0021] like Figure 1As shown in the figure, it is an airtightness detection device for the housing of a static level. The airtightness detection device includes a first valve 1, a second valve 6, a third valve 9, and a fourth valve 10. One ends of the first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are respectively connected to a first connection hole 29, a second connection hole 30, a third connection hole 31, and a fourth connection hole 32 through four connectors. The other ends of the third valve 9 and the fourth valve 10 are respectively connected to a pressurization assembly through a connecting pipe 11. A sealing tooling 3 is arranged in the installation hole, and the sealing tooling 3 is used to seal the installation hole.

[0022] Among them, the four connections are a first tower joint 2, a second tower joint 5, a third tower joint 7, and a fourth tower joint 8. One ends of the first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are respectively connected to the first connection hole 29, the second connection hole 30, the third connection hole 31, and the fourth connection hole 32 through the first tower joint 2, the second tower joint 5, the third tower joint 7, and the fourth tower joint 8; the first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are straight-through valves, and the straight-through valves can be ball valves, butterfly valves, etc.; the pressurization assembly includes a pressure gauge, an air pump 13, and a pressure indicator 15. The other ends of the third valve 9 and the fourth valve 10 are connected to the pressure gauge through a connecting pipe 11. The output end of the air pump 13 is connected to the pressure gauge, and the pressure indicator 15 is arranged on the pressure gauge. The pressure gauge is a float-type pressure gauge 12; the sealing tooling 3 includes a plugging block 3a filled in the installation hole, a sealing ring 3b arranged on the outer wall of the plugging block 3a, and several connecting rods 3c arranged on the plugging block 3a. The sealing ring 3b is in interference fit with the side wall of the installation hole.

[0023] Specifically, the first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are used for controlling the on-off of the air path, and the first tower joint 2, the second tower joint 5, the third tower joint 7, and the fourth tower joint 8 are used for pipeline connection, such as Figure 3 As shown in the figure, the size of the sealing tooling 3 is 19.0 mm, which is used to seal the installation hole of the pressure core. The connecting rod 3c of the sealing tooling 3 is used to block the small hole and the back-pressure vent 27 to further achieve the sealing effect. The float-type pressure gauge 12 can be used to output and control different pressure outputs. The air pump 13 is used to provide air source for the float pressure gauge. The pressure indicator 15 is used to observe the air pressure maintenance situation. If there is an airtightness problem, the reading of the pressure indicator 15 will continuously decrease, which is used to judge the airtightness.

[0024] Air tightness detection process: Take out the static level instrument housing to be tested. One end of the first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are respectively connected to the first connection hole 29, the second connection hole 30, the third connection hole 31, and the fourth connection hole 32 of the static level instrument housing through the first compression joint 2, the second compression joint 5, the third compression joint 7, and the fourth compression joint 8. Squeeze and install the sealing tooling 3 into the installation hole of the static level instrument housing to seal it. The first valve 1, the second valve 6, the third valve 9, and the fourth valve 10 are all in a sealed state. Then connect the third valve 9 and the fourth valve 10 to the float type manometer 12 through the connecting pipe 11. After all connections are made, add pure water to the water tank 14, and then put the static level instrument housing to be tested into the water tank 14. Set the float type manometer 12 to the test pressure, start the air pump 13, and then open the third valve 9. The air pump 13 introduces gas into the liquid chamber. The staff can check the reading of the pressure gauge 15. If the reading of the pressure gauge 15 continues to drop, it means there is a problem with air tightness. If the air tightness is normal and there is no leakage, the pressure reading will remain constant within a certain period of time. If it is necessary to test the air tightness of the back pressure chamber, the operator can close the third valve 9, open the fourth valve 10, and then start the air pump 13. The operation of testing the air tightness of the back pressure chamber is basically the same as that of testing the air tightness of the liquid chamber, so it will not be elaborated here.

[0025] In summary, by starting the air pump 13 and then opening the third valve 9 or the fourth valve 10, the air pump 13 introduces gas into the liquid chamber or the back pressure chamber. The staff can check the reading of the pressure gauge 15. If the reading of the pressure gauge 15 continues to drop, it means there is a problem with air tightness. If the air tightness is normal and there is no leakage, the pressure reading will remain constant within a certain period of time. Thus, the air tightness of the incoming static level instrument housing can be quickly detected. Through the test tooling, rapid inspection can be achieved, improving efficiency. Further, through the above air tightness test, defects such as cracks and drilling sand holes can be screened out, and the detection rate of quality hazards is high. In addition, using the pure water tank 14 for testing, the detection effect is intuitive. At the same time, a pressure gauge 15 is designed to observe the air pressure maintenance situation. If there is an air tightness problem, the reading of the pressure gauge 15 will continue to drop, further intuitively judging the air tightness.

[0026] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0027] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A device for detecting air tightness of a static level housing, the static level housing comprising a static level housing, a liquid chamber and a back pressure chamber separated and formed inside the static level housing, a mounting hole for mounting a pressure sensitive core arranged inside the static level housing, and a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole respectively arranged on the static level housing, the first connecting hole and the second connecting hole being connected to the liquid chamber, and the third connecting hole and the fourth connecting hole being connected to the back pressure chamber; characterized in that: The air tightness detection device includes a first valve, a second valve, a third valve and a fourth valve, one end of the first valve, the second valve, the third valve and the fourth valve are respectively connected to the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole through four connecting heads, the other end of the third valve and the fourth valve are respectively connected to the pressurizing component through a connecting pipe, and a sealing tool is provided in the mounting hole, and the sealing tool is used to seal the mounting hole.

2. The airtightness detection device according to claim 1, characterized in that: The four connections are respectively a first pagoda joint, a second pagoda joint, a third pagoda joint and a fourth pagoda joint, and one end of the first valve, the second valve, the third valve and the fourth valve are respectively connected to the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole through the first pagoda joint, the second pagoda joint, the third pagoda joint and the fourth pagoda joint.

3. The airtightness detection device according to claim 1, characterized in that: The pressurizing component includes a pressure gauge, an air pump and a pressure gauge. The other ends of the third valve and the fourth valve are connected to the pressure gauge through a connecting pipe, the output end of the air pump is connected to the pressure gauge, and the pressure gauge is arranged on the pressure gauge.

4. The airtightness detection device according to claim 3, characterized in that: The pressure gauge is a float type pressure gauge.

5. The airtightness detection device according to claim 1, characterized in that: The first valve, the second valve, the third valve and the fourth valve are through valves.

6. The airtightness detection device according to claim 1, characterized in that: The sealing tool comprises a blocking block filled in the installation hole, a sealing ring arranged on the outer wall of the blocking block, and a plurality of connecting rods arranged on the blocking block, wherein the sealing ring is interference-fitted with the side wall of the installation hole.

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