Portable direct-pressure leak detection device

Abstract

The utility model discloses a portable direct pressure method leak detection device, which relates to the technical field of gas analyzers and comprises a support panel, an air compression pump, a pressure reducing valve assembly, a switch valve assembly, an overflow valve assembly, a pressure gauge assembly, a record display screen and a gas outlet interface assembly. The pressure reducing valve assembly comprises a pressure reducing valve and a pressure reducing valve pressure gauge. The pressure reducing valve communicates with the air compression pump. The switch valve assembly comprises a switch valve which is arranged at the outlet end of the pressure reducing valve. The overflow valve assembly comprises an overflow valve, the overflow valve is communicated with the pressure reducing valve, and the switch valve is arranged between the overflow valve and the pressure reducing valve; the pressure gauge assembly comprises a leak detection pressure gauge and a flow cell, the leak detection pressure gauge is installed on the flow cell, and the flow cell is located at the outlet end of the overflow valve; the recording display screen records a leak detection pressure process; the air outlet connector assembly comprises a multi-way switching valve and a connector. The leak detection tool is convenient to operate, and the airtightness detection of the leak detection tool can be easily realized; the appearance is small, the weight is light, and the quick movement of the leak detection tool can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gas analysis equipment, and particularly relates to a portable leak detection device by direct pressure method. Background Art

[0002] By performing airtightness detection on instruments and meters, it is possible to effectively detect whether there is a leakage phenomenon in the instruments and meters, as well as the degree and location of the leakage, so as to take corresponding measures for repair and maintenance in a timely manner, and ensure the normal operation and use effect of the instruments and meters.

[0003] In the analyzer industry, the commonly used airtightness leak detection tooling is a U-shaped water column differential pressure gauge. This method can only perform leak detection at low pressures, and it is obviously insufficient for occasions with large pressure leak detection. Moreover, the U-shaped water column differential pressure gauge has disadvantages such as large volume, fragile U-shaped glass tube, inconvenient to move, and unclear reading.

[0004] For occasions with large pressure leak detection, there are mainly two relatively mainstream airtightness leak detection methods, namely direct pressure leak detection and differential pressure leak detection. Their common point is that both use compressed air to replace the real working medium. Some of the leak detection devices developed according to these two working principles have become serialized and mature products, and are widely configured on modern production lines.

[0005] At both ends of the differential pressure sensor interface in the differential pressure leak detection tooling, a standard part and a measured part are respectively connected. For the analyzer industry, especially gas analyzer enterprises, products are mostly produced in small batches, with many product customizations and categories, and it is difficult to determine a unified standard part. The direct pressure leak detection tooling does not require connecting a standard part, and it is a leak detection method widely used by current gas analyzer enterprises.

[0006] Most of the current direct pressure leak detection tooling on the market is an all-in-one machine. The attached special fixture tooling is not suitable for leak detection of gas analyzer products produced in small batches. Moreover, the direct pressure leak detection all-in-one machine has complex operations, is not user-friendly for workers, and can only complete leak detection of a single measured product at a time, with low work efficiency. Summary of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a portable leak detection device by direct pressure method.

[0008] The portable leak detection device by direct pressure method provided by the utility model adopts the following technical solutions:

[0009] A portable direct pressure leak detection device comprises a bracket panel, an air compression pump fixed on the bracket panel, a pressure reducing valve assembly, a switch valve assembly, a relief valve assembly, a pressure gauge assembly, a recording display screen and an air outlet interface assembly; the pressure reducing valve assembly comprises a pressure reducing valve and a pressure reducing valve pressure gauge, and the pressure reducing valve is connected to the air compression pump; the switch valve assembly comprises a switch valve, and the switch valve is arranged at the outlet end of the pressure reducing valve; the relief valve assembly comprises a relief valve, and the relief valve is connected to the pressure reducing valve, and the switch valve is arranged between the relief valve and the pressure reducing valve; the pressure gauge assembly comprises a leak detection pressure gauge and a circulation cell, and the leak detection pressure gauge is installed on the circulation cell, and the circulation cell is located at the outlet end of the relief valve; the recording display screen is connected to the signal output interface of the leak detection pressure gauge to record the leak detection pressure process; the air outlet interface assembly comprises a multi-way switching valve and a connector arranged on the multi-way switching valve for connecting the product to be leaked.

[0010] Furthermore, at least one pipeline branch is provided at the outlet end of the pressure reducing valve, and each of the pipeline branches is provided with a switch valve assembly, a relief valve assembly, a pressure gauge assembly, a recording display screen and an air outlet interface assembly.

[0011] Furthermore, the pressure reducing valve assembly also includes a pressure reducing valve bracket, and the pressure reducing valve is installed on the bracket panel through the pressure reducing valve bracket.

[0012] Furthermore, the switch valve assembly also includes a switch valve bracket, and the switch valve is installed on the bracket panel through the switch valve bracket.

[0013] Furthermore, the pressure gauge assembly also includes a circulation cell bracket, and the circulation cell is installed on the bracket panel through the circulation cell bracket.

[0014] Furthermore, the air outlet interface assembly also includes a switching valve bracket, and the multi-way switching valve is installed on the bracket panel through the switching valve bracket.

[0015] Furthermore, the multi-way switching valve is a three-way switching valve, one end of which is connected to the outlet of the circulation pool, and the connector includes a ferrule connector and a pagoda connector arranged at two outer interfaces of the three-way switching valve.

[0016] In summary, the present invention has at least one of the following beneficial effects:

[0017] 1. In the leak detection tooling, the number of pressure gauge assemblies, relief valve assemblies, and switch valve assemblies can be configured according to actual scene requirements, and leak detection of different quantities of products can be completed at the same time, reducing workers' waiting time and improving leak detection efficiency;

[0018] 2. In the leak detection tool, the pressure value of the leak detection can be set through the overflow valve, which can realize leak detection of the tested products under different pressure conditions; if the pressure entering the pipeline is too high, the overflow can play the role of automatic pressure relief. The leak detection tool is equipped with an air compression pump, which can be used in scenes without compressed air; it is equipped with a pressure recording and display instrument to reduce the number of workers recording and improve production efficiency;

[0019] 3. The air outlet of the leak detection tool can be connected to a rubber hose with a pagoda joint, and a metal hard pipe with a ferrule joint, which can meet the use of various pipeline scenarios and improve the connection compatibility of the leak detection tool;

[0020] 4. The leak detection tool has a simple structure and is easy to operate, making it easier to detect the air tightness of the leak detection tool itself; it has a small appearance and light weight, allowing workers to quickly move the leak detection tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 The present invention is a schematic structural diagram of an embodiment of the present invention having two branches.

[0023] Description of reference numerals:

[0024] 1. Bracket panel; 2. Air compression pump; 3. Pressure reducing valve assembly; 31. Pressure reducing valve; 32. Pressure reducing valve pressure gauge; 33. Pressure reducing valve bracket; 4. Switch valve assembly; 41. Switch valve; 42. Switch valve bracket; 5. Overflow valve; 6. Pressure gauge assembly; 61. Leak detection pressure gauge; 62. Circulation cell; 63. Circulation cell bracket; 7. Recording display screen; 8. Air outlet interface assembly; 81. Multi-way switching valve; 82. Switching valve bracket; 83. Compression fitting; 84. Pagoda connector. DETAILED DESCRIPTION

[0025] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] The following is combined with Figure 1-2 The utility model is described in further detail.

[0027] The utility model discloses a portable direct pressure leak detection device. Figure 1-2, the portable direct-pressure leak detection device includes a support panel 1, an air compression pump 2 fixed on the support panel 1, a pressure reducing valve assembly 3, a switching valve assembly 4, an overflow valve assembly 5, a pressure gauge assembly 6, a recording display screen 7, and an air outlet interface assembly 8; the pressure reducing valve assembly 3 includes a pressure reducing valve 31 and a pressure reducing valve pressure gauge 32, and the pressure reducing valve 31 is communicated with the air compression pump 2 through a metal pipe; the switching valve assembly 4 includes a switching valve 41, and the switching valve 41 is arranged at the outlet end of the pressure reducing valve 31; the overflow valve assembly 5 includes an overflow valve, the overflow valve is communicated with the pressure reducing valve 31 through a metal pipe, and the switching valve 41 is arranged between the overflow valve and the pressure reducing valve 31; the pressure gauge assembly 6 includes a leak detection pressure gauge 61 and a flow cell 62, the leak detection pressure gauge 61 is installed on the flow cell 62, the flow cell 62 is located at the outlet end of the overflow valve, according to the use scenario, the leak detection pressure gauge 61 can be either a mechanical pressure gauge or a precision pressure sensor, a mechanical pressure gauge is commonly used for gross leak detection, and a precision pressure sensor is commonly used for fine leak detection; the recording display screen 7 is connected to the signal output interface of the leak detection pressure gauge 61, records the leak detection pressure process, and can display the pressure drop curve; the air outlet interface assembly 8 includes a multi-way switching valve 81 and a connector arranged on the multi-way switching valve 81 for connecting the product to be leak detected.

[0028] During use, turn the switch of the pressure reducing valve 31 to the minimum position; turn the switching valve 41 to the open state, turn on the leak detection pressure gauge 61, according to the leak detection pressure range, set the pressure value of the overflow valve, that is, the maximum leak detection pressure value, connect the air outlet interface to the product to be leak detected with a rubber hose or a metal pipe, turn on the air compression pump 1, the gas enters the intake port of the pressure reducing valve 31 along the pipeline, and slowly open the pressure reducing valve 31, and observe the reading of the leak detection pressure gauge. When the set pressure value required for leak detection is reached, turn off the air compression pump 1 and the switching valve 41 in sequence. Within the given time, observe the pressure drop on the recording display screen 7 to determine whether the product to be measured is leaking, so as to complete the leak detection of the product to be measured; it can be configured according to the actual scenario requirements, and at the same time complete the leak detection of different numbers of products, reduce the waiting time of workers, and improve the leak detection efficiency. In the leak detection tooling, the pressure value of leak detection can be set through the overflow valve, and the leak detection of products to be measured under different pressure conditions can be realized; if the pressure entering the pipeline is too large, the overflow can play an automatic pressure relief role. The structure of the leak detection tooling is simple, easy to operate, and it is relatively easy to realize the airtightness detection of the leak detection tooling itself; it is small in size and light in weight, and the worker can quickly move the leak detection tooling.

[0029] In this embodiment, at least one pipeline branch is provided at the outlet end of the pressure reducing valve 31. A switch valve assembly 4, a relief valve assembly 5, a pressure gauge assembly 6, a recording display screen 7, and an air outlet interface assembly 8 are provided on each pipeline branch. In this embodiment, a tee joint is provided at the outlet end of the pressure reducing valve 31, and two branches are connected. In the leak detection tooling, the number of branches can be configured according to actual scenario requirements. The number of the pressure gauge assembly 6, the relief valve assembly 5, and the switch valve assembly 4 can be configured according to the number of branches, so as to complete the leak detection of products with different quantities at the same time, reduce the waiting time of workers, and improve the leak detection efficiency.

[0030] In this embodiment, the pressure reducing valve assembly 3 further includes a pressure reducing valve bracket 33. The pressure reducing valve 31 is installed on the bracket panel 1 through the pressure reducing valve bracket 33, and the pressure reducing valve pressure gauge 32 is installed on the pressure reducing valve 31 through a ferrule joint.

[0031] In this embodiment, the switch valve assembly 4 further includes a switch valve bracket 42. The switch valve 41 is installed on the bracket panel 1 through the switch valve bracket 42.

[0032] In this embodiment, the pressure gauge assembly 6 further includes a flow cell bracket 63. The flow cell 62 is installed on the bracket panel 1 through the flow cell bracket 63.

[0033] In this embodiment, the air outlet interface assembly 8 further includes a switching valve bracket 82. The multi-way switching valve 81 is installed on the bracket panel 1 through the switching valve bracket 82.

[0034] In this embodiment, the multi-way switching valve 81 is a three-way switching valve. One end of the three-way switching valve is communicated with the outlet of the flow cell 62. The connector includes a ferrule joint 83 and a flare fitting 84 provided at the two outer interfaces of the three-way switching valve. The ferrule joint 83 can be connected to a metal pipe, and the flare fitting 84 can be connected to a rubber hose, and can be flexibly selected through the three-way switching valve.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A portable direct pressure leak detection device, characterized in that: It comprises a support panel (1), an air compression pump (2) fixed on the support panel (1), a pressure reducing valve assembly (3), a switch valve assembly (4), a relief valve assembly (5), a pressure gauge assembly (6), a recording display screen (7) and an air outlet interface assembly (8); The pressure reducing valve assembly (3) comprises a pressure reducing valve (31) and a pressure reducing valve pressure gauge (32), and the pressure reducing valve (31) is connected to the air compression pump (2); The switch valve assembly (4) comprises a switch valve (41), and the switch valve (41) is arranged at the outlet end of the pressure reducing valve (31); The overflow valve assembly (5) comprises an overflow valve, the overflow valve is in communication with the pressure reducing valve (31), and the switch valve (41) is arranged between the overflow valve and the pressure reducing valve (31); The pressure gauge assembly (6) comprises a leak detection pressure gauge (61) and a circulation pool (62), wherein the leak detection pressure gauge (61) is mounted on the circulation pool (62), and the circulation pool (62) is located at the outlet end of the overflow valve (51); The recording display screen (7) is connected to the signal output interface of the leak detection pressure gauge (61) to record the leak detection pressure process; The air outlet interface assembly (8) comprises a multi-way switching valve (81) and a connector arranged on the multi-way switching valve (81) and used for connecting to a product to be leak-detected.

2. The portable direct pressure leak detection device according to claim 1, characterized in that: The outlet end of the pressure reducing valve (31) is provided with at least one pipeline branch, and each of the pipeline branches is provided with a switch valve assembly (4), a relief valve assembly (5), a pressure gauge assembly (6), a recording display screen (7) and an air outlet interface assembly (8).

3. The portable direct pressure leak detection device according to claim 1, characterized in that: The pressure reducing valve assembly (3) further comprises a pressure reducing valve bracket (33), and the pressure reducing valve (31) is mounted on the bracket panel (1) via the pressure reducing valve bracket (33).

4. The portable direct pressure leak detection device according to claim 1, characterized in that: The switch valve assembly (4) further comprises a switch valve bracket (42), and the switch valve (41) is mounted on the bracket panel (1) via the switch valve bracket (42).

5. The portable direct pressure leak detection device according to claim 1, characterized in that: The pressure gauge assembly (6) further comprises a circulation cell bracket (63), and the circulation cell (62) is mounted on the bracket panel (1) via the circulation cell bracket (63).

6. The portable direct pressure leak detection device according to claim 1, characterized in that: The air outlet interface assembly (8) further comprises a switching valve bracket (82), and the multi-way switching valve (81) is mounted on the bracket panel (1) via the switching valve bracket (82).

7. The portable direct pressure leak detection device according to claim 6, characterized in that: The multi-way switching valve (81) is a three-way switching valve, one end of which is connected to the outlet of the circulation pool (62), and the connector comprises a ferrule connector (83) and a pagoda connector (84) arranged at two outer interfaces of the three-way switching valve.

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