Gas pressure sensor steady flow leak hunting tool

Abstract

The utility model relates to an air pressure sensor steady flow leak hunting tool comprising a bottom plate, a sensor positioning seat is installed on the bottom plate, and two sides of the sensor positioning seat are respectively provided with an air inlet pipe assembly and an air outlet pipe assembly; the air inlet pipe assembly comprises an air distribution block, an air inlet flow stabilizing pipe and a pressure gauge are installed on the air distribution block, a test air inlet is formed in the air distribution block, and the test air inlet is communicated with the air inlet flow stabilizing pipe; the air outlet pipe assembly comprises a guide fixing plate, the guide fixing plate is tightly attached to the sensor positioning seat, and an air outlet flow stabilizing pipe is slidably installed in the guide fixing plate and driven by an air cylinder; the pipe diameters of the air inlet flow stabilizing pipe and the air outlet flow stabilizing pipe are the same as the size of an air channel in the air pressure sensor. According to the utility model, the precision detection of the barometric sensor is realized, the detection efficiency is improved, and the pipe diameters of the air inlet steady flow pipe and the air outlet steady flow pipe are the same as the size of the internal air passage of the barometric sensor, thereby ensuring the stability of air flow passing through the barometric sensor.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensor manufacturing and relates to a steady-flow leak detection tool for an air pressure sensor. Background Art

[0002] The air pressure sensor is an instrument used to measure the absolute pressure of gas. It is mainly suitable for physical experiments related to gas pressure, such as gas laws, etc. It can also measure the pressure of dry, non-corrosive gases in biological and chemical experiments.

[0003] Accuracy is an important indicator of air pressure sensors, so during the production process of air pressure sensors, the accuracy of air pressure sensors needs to be tested. Existing tests require manual operation, which has low work efficiency and unstable detection results. Summary of the invention

[0004] The purpose of the utility model is to provide a pressure sensor steady flow leak detection tooling, which can solve the above-mentioned problems, and by setting the diameters of the air inlet steady flow tube and the air outlet steady flow tube to be the same as the size of the internal airway of the pressure sensor, the stability of the airflow through the pressure sensor is ensured.

[0005] According to the technical solution provided by the utility model: a pressure sensor steady flow leak detection tooling, including a base plate, a sensor positioning seat is installed on the base plate, and an air inlet pipe assembly and an air outlet pipe assembly are respectively provided on both sides of the sensor positioning seat; the air inlet pipe assembly includes an air distributor block, an air inlet steady flow pipe and a pressure gauge are installed on the air distributor block, a test air inlet port is opened on the air distributor block, and the test air inlet port is connected to the air inlet steady flow pipe; the air outlet pipe assembly includes a guide fixing plate, the guide fixing plate is tightly attached to the sensor positioning seat, and an air outlet steady flow pipe is slidably installed in the guide fixing plate, and the air outlet steady flow pipe is driven by a cylinder; the diameters of the air inlet steady flow pipe and the air outlet steady flow pipe are the same as the size of the air duct inside the pressure sensor.

[0006] As a further improvement of the utility model, a positioning groove is provided on the sensor positioning seat for placing the air pressure sensor, the air inlet end of the air pressure sensor faces the air inlet pipe assembly, and the air outlet end of the air pressure sensor faces the air outlet pipe assembly.

[0007] As a further improvement of the utility model, a connected air intake transmission duct and a detection air intake duct are provided in the air distribution block; the outer end of the air intake transmission duct is a connecting screw hole; the test air inlet is located at the inner end of the air intake transmission duct, close to the sensor positioning seat.

[0008] As a further improvement of the utility model, the other end of the air intake steady flow tube is connected to a test air source.

[0009] As a further improvement of the present invention, the connecting screw hole and the end of the intake flow stabilizer pipe are adapted to have a pipe thread structure, specifically g3 / 8.

[0010] As a further improvement of the utility model, the detection airway is vertically arranged, the lower end of the detection airway is connected to the middle part of the air intake transmission airway, and a pressure gauge is installed at the upper end of the detection airway.

[0011] As a further improvement of the utility model, a sealing ring is installed at the bottom of the pressure gauge.

[0012] As a further improvement of the utility model, the cylinder is connected to the base plate through a cylinder fixing plate, and the cylinder piston end faces the sensor positioning seat and is connected to the gas outlet stabilizing flow pipe.

[0013] As a further improvement of the utility model, guide holes are opened on the guide fixing plate and the cylinder fixing plate, and the gas outlet flow stabilizing tube slides in the guide holes.

[0014] As a further improvement of the utility model, a ball valve is installed in the middle of the air outlet steady flow pipe and the air inlet steady flow pipe.

[0015] The positive effects of this application are:

[0016] The utility model realizes precision detection of the air pressure sensor and improves detection efficiency. By setting the diameters of the air inlet and outlet steady flow tubes to be the same as the size of the airway inside the air pressure sensor, the airflow through the air pressure sensor is ensured to be stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a top view of the utility model.

[0019] Figure 3 It is a cross-sectional view of the gas dividing block of the utility model.

[0020] Figure 1-Figure 3 It includes a base plate 1, an air distribution block 2, an air intake transmission air duct 2-1, a detection air duct 2-2, a sensor positioning seat 3, a guide fixing plate 4, a cylinder fixing plate 5, an air outlet flow stabilizing tube 6, a pressure gauge 10, a cylinder, an air intake flow stabilizing tube 24, an air pressure sensor 25, etc. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0025] like Figure 1-Figure 2 As shown, the utility model is a steady-flow leak detection tool for an air pressure sensor, comprising a base plate 1, a sensor positioning seat 3 is installed on the base plate 1, and an air inlet pipe assembly and an air outlet pipe assembly are respectively arranged on both sides of the sensor positioning seat 3.

[0026] The sensor positioning seat 3 is provided with a positioning groove for placing the air pressure sensor 25. The air inlet end of the air pressure sensor 25 faces the air inlet pipe assembly, and the air outlet end of the air pressure sensor 25 faces the air outlet pipe assembly.

[0027] The air intake pipe assembly includes an air distribution block 2 , on which an air intake steady flow tube 24 and a pressure gauge 10 are installed. A test air intake port is opened on the air distribution block 2 , and the test air intake port is connected to the air intake steady flow tube 24 .

[0028] like Figure 3 As shown, the gas distribution block 2 is provided with an air intake transmission channel 2-1 and a detection channel 2-2 that are connected. The outer end of the air intake transmission channel 2-1 is a connecting screw hole for connecting one end of the air intake stabilizing flow tube 24; the test air intake is located at the inner end of the air intake transmission channel 2-1, close to the sensor positioning seat 3.

[0029] The other end of the intake steady flow tube 24 is connected to the test air source.

[0030] The connecting screw hole and the end of the intake flow stabilizing pipe 24 are adapted pipe thread structures, specifically g3 / 8.

[0031] The detection airway 2-2 is vertically arranged, the lower end of the detection airway 2-2 is connected to the middle of the air inlet transmission airway 2-1, and the upper end of the detection airway 2-2 is equipped with a pressure gauge 10. In order to ensure the air tightness of the pressure gauge 10, a sealing ring is installed at the bottom of the pressure gauge 10.

[0032] The air outlet pipe assembly comprises a guide fixing plate 4, which is in close contact with the sensor positioning seat 3, in which an air outlet steady flow pipe 6 is slidably installed, and the air outlet steady flow pipe 6 is driven by a cylinder.

[0033] The cylinder is connected to the base plate 1 through the cylinder fixing plate 5 , and the cylinder piston end faces the sensor positioning seat 3 and is connected to the gas outlet stabilizing flow pipe 6 .

[0034] The guide fixing plate 4 is provided with a guide hole, which is slidably matched with the outlet flow stabilizing tube 6. In order to further increase the sliding stability and straightness of the outlet flow stabilizing tube 6, the cylinder fixing plate 5 is also provided with a guide hole, and the guide holes on the guide fixing plate 4 and the cylinder fixing plate 5 are coaxially arranged, and the outlet flow stabilizing tube 6 slides in the guide hole.

[0035] In order to facilitate the control of the test rhythm, a ball valve 22 is installed in the middle of the outlet flow stabilizing pipe 6 and the inlet flow stabilizing pipe 24.

[0036] In order to protect the cylinder, a protective cover 8 is provided above the cylinder. The protective cover 8 is installed on the top of the guide fixing plate 4 and the cylinder fixing plate 5.

[0037] The diameters of the inlet and outlet flow stabilizing tubes 24 and 6 are the same as the size of the air passage inside the air pressure sensor 25 , thereby ensuring that the airflow passing through the air pressure sensor 25 is stable.

[0038] The working process of the utility model is as follows:

[0039] The air pressure sensor 25 is placed on the sensor positioning seat 3, and the cylinder piston rod is extended to drive the outlet flow-stabilizing tube 6 to move toward the air pressure sensor 25 until the gas block 2, the air pressure sensor 25, and the outlet flow-stabilizing tube 6 are against each other, and the test air inlet is close to the air inlet end of the air pressure sensor 25, and the air inlet flow-stabilizing tube 24, the air pressure sensor 25, and the outlet flow-stabilizing tube 6 are connected. The test air source passes through the air pressure sensor 25, and observes whether the values ​​of the pressure gauge 10 and the air pressure sensor 25 are within the specified range.

[0040] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A steady-flow leak detection tool for an air pressure sensor, comprising a bottom plate (1), characterized in that: A sensor positioning seat (3) is mounted on the bottom plate (1), and an air inlet pipe assembly and an air outlet pipe assembly are respectively arranged on both sides of the sensor positioning seat (3); the air inlet pipe assembly comprises an air distribution block (2), an air inlet flow stabilizing pipe (24) and a pressure gauge (10) are mounted on the air distribution block (2), a test air inlet is opened on the air distribution block (2), and the test air inlet is connected to the air inlet flow stabilizing pipe (24); the air outlet pipe assembly comprises a guide fixing plate (4), the guide fixing plate (4) is closely attached to the sensor positioning seat (3), an air outlet flow stabilizing pipe (6) is slidably mounted in the guide fixing plate (4), and the air outlet flow stabilizing pipe (6) is driven by a cylinder; the diameters of the air inlet flow stabilizing pipe (24) and the air outlet flow stabilizing pipe (6) are the same as the size of the air passage inside the air pressure sensor (25).

2. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: The sensor positioning seat (3) is provided with a positioning groove for placing the air pressure sensor (25), the air inlet end of the air pressure sensor (25) faces the air inlet pipe assembly, and the air outlet end of the air pressure sensor (25) faces the air outlet pipe assembly.

3. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: An air intake transmission air duct (2-1) and a detection air duct (2-2) are provided in the air distribution block (2); the outer end of the air intake transmission air duct (2-1) is a connecting screw hole; and the test air intake port is located at the inner end of the air intake transmission air duct (2-1) and is close to the sensor positioning seat (3).

4. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: The other end of the air intake steady flow pipe (24) is connected to a test air source.

5. The steady-flow leak detection tool for air pressure sensor according to claim 3, characterized in that: The connecting screw hole and the end of the intake flow stabilizing pipe (24) are adapted pipe thread structures, specifically g3 / 8.

6. The steady-flow leak detection tool for air pressure sensor according to claim 3, characterized in that: The detection airway (2-2) is arranged vertically, the lower end of the detection airway (2-2) is connected to the middle of the air inlet transmission airway (2-1), and a pressure gauge (10) is installed at the upper end of the detection airway (2-2).

7. The steady-flow leak detection tool for air pressure sensor according to claim 6, characterized in that: Install a sealing ring at the bottom of the pressure gauge (10).

8. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: The cylinder is connected to the base plate (1) via a cylinder fixing plate (5); the cylinder piston end faces the sensor positioning seat (3) and is connected to the gas outlet stabilizing flow pipe (6).

9. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: The guide fixing plate (4) and the cylinder fixing plate (5) are provided with guide holes, and the gas outlet flow stabilizing pipe (6) slides in the guide holes.

10. The steady-flow leak detection tool for air pressure sensor according to claim 1, characterized in that: A ball valve (22) is installed in the middle of the outlet flow stabilizing pipe (6) and the inlet flow stabilizing pipe (24).

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