Automatic airtightness detection tool for sensor

Abstract

The utility model relates to an automatic airtightness detection tool for a sensor, which comprises a bottom plate, a detection base and an adjusting seat are arranged on the bottom plate, a pressing device is fixedly connected to the adjusting seat, a positioning detection hole is formed in the detection base, an inflation head is arranged on the side of the detection base, and a top head is slidably connected to the bottom of the positioning detection hole on the detection base. The lower portion of the detection base is fixedly connected with a jacking device, a piston rod of the jacking device extends into the detection base to be fixedly connected with the jacking head, the joint of the jacking device and the detection base is fixedly connected with a detection sealing ring, and the movable end of the pressing device is fixedly connected with a pressing head. The beneficial effects of the utility model are that air tightness detection and automatic jacking unloading can be automatically carried out on the sensor, and a sealing ring of the sensor is separated from a positioning detection hole, so that unloading is facilitated; the device can adapt to airtightness detection of sensors of different specifications.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing equipment, specifically to an automated airtightness testing fixture for sensors. Background Technology

[0002] A sensor is a device that receives signals or stimuli and reacts, converting a measured physical or chemical quantity into a corresponding output. When a sensor is installed through a cylinder with other components, a seal between the sensor and the cylinder component is required. O-rings are typically designed onto the sensor. In this case, the seal between the sensor itself and the O-ring, as well as the seal between the O-ring and the cylinder component, needs to be tested for airtightness when the sensor is off-line.

[0003] For the airtightness testing of sensors, an existing oil level sensor airtightness testing device (publication number CN215448366U) includes a base, a base plate mounted on the base, a set of testing oil tanks at the front end of the base plate, a frame at the rear end of the base plate, a top plate on the frame, a lifting cylinder on the top plate, and a testing plate connected to the piston part of the lifting cylinder below the top plate. A testing oil chamber is opened in the middle of the testing oil tanks, and an oil tank opening at the top of the testing oil tanks connects to the testing oil chambers. An oil tank inlet pipe for positioning the oil level sensor is provided at the oil tank opening. A set of pressing parts corresponding to the testing oil tanks are provided on the bottom end face of the testing plate. It also includes testing air pipes connected to the testing oil chambers inside the testing oil tanks, with each testing oil tank corresponding to one testing air pipe. This invention effectively solves the problem of slow airtightness testing efficiency of existing oil level sensors, which mainly relies on manual testing one by one, resulting in high labor intensity and a high risk of missed or incorrect detections.

[0004] Because the sensor is fitted with a sealing ring, when the sensor is tested for air tightness, the sealing ring is tightly attached to the inner wall of the positioning hole. Therefore, after the test is completed, the presence of the sealing ring makes it inconvenient to unload the sensor. Manual unloading may damage the sensor. Therefore, an automated air tightness testing fixture for the sensor is needed. Utility Model Content

[0005] The purpose of this invention is to provide an automated airtightness testing fixture for sensors, which can automatically test the airtightness of sensors and automatically lift and unload them, separating the sensor's sealing ring from the positioning detection hole for easy unloading.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automated airtightness testing fixture for sensors, comprising a base plate, a testing base and an adjusting seat on the base plate, a clamping device fixedly connected to the adjusting seat, a positioning testing hole on the testing base, an inflation head on the side of the testing base, a top head slidably connected to the bottom of the positioning testing hole on the testing base, a lifting device fixedly connected to the lower part of the testing base, a piston rod of the lifting device extending into the testing base and fixedly connected to the top head, a testing sealing ring fixedly connected at the connection between the lifting device and the testing base, and a pressure head fixedly connected to the movable end of the clamping device.

[0007] Furthermore, both the detection base and the clamping device are fixedly connected to the base plate, and the pressure head is made of nylon plastic.

[0008] Furthermore, the air outlet of the inflation head is connected to the positioning detection hole, and the top head is slidably connected to the positioning detection hole.

[0009] Furthermore, the clamping device is specifically a cylinder, and the pressure head is detachably connected to the slide of the clamping device.

[0010] Furthermore, the lifting device is specifically a cylinder, the bottom of the detection base is provided with an annular groove, and the detection sealing ring is located in the annular groove.

[0011] Furthermore, the base plate is provided with a strip groove, the adjusting seat is slidably connected to the strip groove, and the adjusting seat is fixedly connected to the base plate by bolts.

[0012] The beneficial effects of this utility model are as follows: by using the detection base, inflation head, lifting device, top head, detection sealing ring and clamping device in combination, the air tightness of the sensor can be automatically detected and the sensor can be automatically lifted and unloaded, separating the sensor's sealing ring from the positioning detection hole, which facilitates unloading.

[0013] The pressure head is detachable and replaceable, and the position of the adjustment seat is adjustable, which can adapt to the airtightness detection of sensors of different specifications. Attached Figure Description

[0014] Figure 1 This is a first-view schematic diagram of the present invention.

[0015] Figure 2 This is a second-view schematic diagram of the present invention.

[0016] Figure 3 This is a cross-sectional view of the detection base of this utility model.

[0017] Figure 4 This is a schematic diagram of the sensor detection status of this utility model.

[0018] In the diagram: 1. Base plate; 101. Strip groove; 2. Detection base; 201. Positioning detection hole; 3. Pressing device; 301. Press head; 4. Inflation head; 5. Top head; 6. Lifting device; 7. Detection sealing ring; 8. Adjustment seat; 9. Sensor assembly under test. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] Example:

[0021] refer to Figures 1-4 The automated airtightness testing fixture for sensors shown includes a base plate 1, on which a testing base 2 and an adjusting seat 8 are mounted. A clamping device 3 is fixedly connected to the adjusting seat 8. The testing base 2 has a positioning testing hole 201. An inflation head 4 is located on the side of the testing base 2. A top head 5 is slidably connected to the bottom of the positioning testing hole 201 on the testing base 2. A lifting device 6 is fixedly connected to the lower part of the testing base 2. The piston rod of the lifting device 6 extends into the testing base 2 and is fixedly connected to the top head 5. A testing sealing ring 7 is fixedly connected at the connection between the lifting device 6 and the testing base 2. A pressure head 301 is fixedly connected to the movable end of the clamping device 3.

[0022] The pressure head 301 is made of nylon plastic. When the clamping device 3 drives the pressure head 301 to rise and fall for clamping, the nylon plastic pressure head 301 can avoid damaging the sensor. The air outlet of the inflation head 4 is connected to the positioning detection hole 201. When performing air tightness testing, the inflation head 4 is connected to the detection end of an external air tightness tester for inflation testing. The positioning detection hole 201 can guide the rising and falling sliding of the top head 5.

[0023] The clamping device 3 is specifically a cylinder. The clamping device 3 is used to drive the pressure head 301 to rise and fall. When the pressure head 301 rises, the sensor assembly 9 to be tested can be unloaded. When the pressure head 301 falls, the pressure head 301 is used to clamp the sensor assembly 9 to be tested. The pressure head 301 is detachably connected to the slide of the clamping device 3.

[0024] The lifting device 6 is specifically a cylinder. The lifting cylinder 6 drives the lifting head 5 to lift the sensor assembly 9 under test for unloading, so that the sealing ring of the sensor assembly 9 under test is separated from the positioning detection hole 201. The bottom of the detection base 2 is provided with an annular groove, and the detection sealing ring 7 is located in the annular groove. The detection sealing ring 7 is used to ensure the seal between the lifting device 6 and the detection base 2, and to ensure the accuracy of the airtightness test. The base plate 1 is provided with a strip groove 101. The adjusting seat 8 is slidably connected to the strip groove 101. The adjusting seat 8 is fixedly connected to the base plate 1 by bolts. The position of the adjusting seat 8 can be adjusted relative to the base plate 1 to adjust the pressing position of the pressure head 301.

[0025] The working principle of this utility model is as follows: When using this utility model, firstly, the piston rod of the pressing device 3 extends, and the pressing head 301 slides away from the detection base 2, placing the sensor assembly 9 to be tested along the positioning detection hole 201. Then, the piston rod of the pressing device 3 retracts, and the pressing head 301 presses down to press the sensor assembly 9 to be tested. The sealing ring on the sensor assembly 9 to be tested forms a seal with the inner wall of the positioning detection hole 201. Then, the detection end of the external air tightness tester inflates the positioning detection hole 201 through the inflation head 4 (the diameter of the part of the sensor assembly 9 to be tested that extends into the positioning detection hole 201 is smaller than the diameter of the positioning detection hole 201) to perform air tightness testing. After the test is completed, the piston rod of the pressing device 3 extends again, the piston rod of the lifting device 6 extends, and the lifting head 5 lifts the sensor assembly 9 to be tested, causing the sealing ring on the sensor assembly 9 to be tested to separate from the positioning detection hole 201.

[0026] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A sensor automated hermeticity detection tool, characterized by: The device includes a base plate (1), on which a detection base (2) and an adjustment seat (8) are provided. A pressing device (3) is fixedly connected to the adjustment seat (8). A positioning detection hole (201) is opened on the detection base (2). An inflation head (4) is provided on the side of the detection base (2). A top head (5) is slidably connected to the bottom of the positioning detection hole (201) on the detection base (2). A lifting device (6) is fixedly connected to the lower part of the detection base (2). The piston rod of the lifting device (6) extends into the detection base (2) and is fixedly connected to the top head (5). A detection sealing ring (7) is fixedly connected at the connection between the lifting device (6) and the detection base (2). A pressure head (301) is fixedly connected to the movable end of the pressing device (3).

2. The sensor automated hermeticity inspection tool of claim 1, wherein: The detection base (2) and the pressing device (3) are both fixedly connected to the base plate (1), and the pressing head (301) is made of nylon plastic.

3. The sensor automated hermeticity inspection tool of claim 1, wherein: The air outlet of the inflation head (4) is connected to the positioning detection hole (201), and the top head (5) is slidably connected to the positioning detection hole (201).

4. The sensor automated hermeticity inspection tool of claim 1, wherein: The pressing device (3) is specifically a cylinder, and the pressing head (301) is detachably connected to the slide of the pressing device (3).

5. The sensor automated hermeticity inspection tool of claim 1, wherein: The lifting device (6) is specifically a cylinder, the bottom of the detection base (2) is provided with an annular groove, and the detection sealing ring (7) is located in the annular groove.

6. The sensor automated hermeticity inspection tool of claim 1, wherein: The base plate (1) is provided with a strip groove (101), the adjusting seat (8) is slidably connected to the strip groove (101), and the adjusting seat (8) is fixedly connected to the base plate (1) by bolts.

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