Sensor sealing performance test fixture

Abstract

The utility model discloses a sensor leakproofness test fixture, which is characterized in that an upper connecting shaft is hermetically and rotatably connected in a water tank and close to the upper end, a chain wheel I is mounted at one end of the upper connecting shaft in the water tank, a lower connecting shaft is hermetically and rotatably connected in the water tank and close to the lower end, and a chain wheel II is mounted on the lower connecting shaft; a chain is connected between the outer side faces of the first chain wheel and the second chain wheel in a sleeved mode. The end, extending out of the water tank, of the upper rotating shaft is provided with a first driving motor, the lower end of the first driving motor is provided with a motor support, the end, away from the upper connecting shaft, of the chain is fixedly connected with a plurality of transverse rods, the transverse rods are horizontally arranged, the free ends of the transverse rods are provided with U-shaped clamping bodies for clamping sensors, and openings of the clamping bodies face the horizontal direction. And the sensor can be easily inserted from the opening of the clamping body. The device has the advantages that the sensors are conveyed into the water body of the water tank successively, then the air tightness conditions of the sensors are observed, the multiple sensors can be observed under the vacuumizing condition, and then the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a sensor sealing test fixture. Background Art

[0002] Chinese utility model patent No. 202020999068.6 discloses a water inspection air tightness test for a sensor, including a water tank assembly, which includes a water tank and a water tank cover rotatably connected to one side of the water tank. The water tank assembly is made of a transparent material, and a plugging gasket is provided on the water tank cover, which movably rests against the upper edge of the water tank. The water tank cover and the water tank form a sealed space, and an air suction port is provided on one side of the water tank, and a vacuum pump is connected to the air suction port. The vacuum pump can form a negative pressure in the sealed space through the air suction port. Compared with the prior art, the utility model has the advantages of: by placing the sensor to be tested into the water tank, pressing the water tank cover to form a closed cavity, pumping a negative pressure of a specified pressure into the water tank, and observing whether bubbles emerge from the sensor detection part, the air tightness performance of the sensor is detected by using negative pressure water inspection, which is efficient and convenient, and has a good detection effect.

[0003] However, the device can only place one sensor at a time for each test. The test of batch sensors requires repeated steps, such as placing a sensor in a water tank - evacuating the water tank - testing and observing after evacuating the water tank, restoring the air pressure in the water tank after the observation is completed, and taking out the tested sensor. When testing the next sensor, the above steps need to be repeated, which indirectly leads to low efficiency of the detection process. Utility Model Content

[0004] The utility model solves the above-mentioned technical problem of low detection efficiency.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a sensor sealing test fixture, including a transparent water tank, a water tank cover capable of sealing the water tank opening, an air extraction port located at the upper end of the water tank, a vacuum pumping device for vacuumizing the gas in the water tank, a display, an air source pressure alarm indicator, a start button, and a stop button. The vacuum valve of the vacuum pumping device can release pressure, and it can be assembled and connected according to the existing technology. The utility model product is mainly improved in the water tank;

[0006] An upper connecting shaft is sealed and rotatably connected in the water tank near the upper end, a sprocket wheel 1 is installed at one end of the upper connecting shaft located in the water tank, a lower connecting shaft is sealed and rotatably connected in the water tank near the lower end, a sprocket wheel 2 is installed on the lower connecting shaft, the upper connecting shaft corresponds to the lower connecting shaft up and down, and a chain is sleeved between the outer sides of the sprocket wheel 1 and the sprocket wheel 2; a driving motor 1 is provided at one end of the upper connecting shaft extending out of the water tank, a motor bracket is provided at the lower end of the driving motor, and the driving motor 1 can adopt a commonly used motor, a servo motor, a stepping motor, a reduction motor, etc.;

[0007] One end of the chain away from the upper connecting shaft is fixedly connected to a plurality of cross bars, which are arranged horizontally. The free ends of the cross bars are provided with U-shaped clamping bodies for clamping sensors. The opening of the clamping bodies faces the horizontal direction, and the opening end of the clamping bodies faces slightly outward. Its width is greater than that of other parts, making it easy to insert the sensor from the opening of the clamping body.

[0008] Furthermore, it also includes a stirring device, which includes a stirring shaft that is sealed and rotatably connected inside the water tank and near the lower end, a number of stirring rods are installed on the outer side of the stirring shaft, and a drive motor 2 is provided outside the water tank and corresponding to the position of the stirring shaft. The output shaft of the drive motor 2 is connected to one end of the stirring shaft extending out of the water tank, and the drive motor 2 is fixed outside the water tank. The drive motor 2 can adopt a commonly used motor, servo motor, stepper motor, reduction motor, etc.

[0009] Furthermore, it also includes a water purification device, which includes a water outlet pipe connected to the lower end of the water tank and capable of pumping water out of the water tank. A solenoid valve is provided on the water outlet pipe. The opening or closing of the solenoid valve makes the water outlet pipe connected to or not connected to the water in the water tank. The water outlet pipe is connected to a purifier, and the purifier is connected to a water pump through a pipeline. The discharge end of the water pump is connected to the water tank through a pipeline, so that the purified water is pumped into the water tank.

[0010] Furthermore, a rubber buffer layer is provided on the inner surface of the clamping body to avoid pinching the sensor.

[0011] Furthermore, the chain transmission center distance is vertical, which is conducive to clear observation of the sensor.

[0012] Furthermore, digital numbers are provided on the outer sides of the clamping bodies, and the digital numbers of each clamping body are different, which is convenient for people to record.

[0013] The advantages of the utility model compared with the prior art are:

[0014] 1. Insert multiple sensors into the clamping body in sequence, then cover the water tank cover on the water tank to make the water tank sealed, then evacuate the water tank, and then start the drive motor 1, so that the sensors can be transported into the water body of the water tank one by one, and then observe the air tightness of the sensors. Multiple sensors can be observed under vacuum, thereby improving the detection efficiency;

[0015] 2. Because there are many components in the water tank, traditional manual water change is not convenient, so water purification equipment and stirring equipment are added to prevent impurities from settling and being easily pumped away for filtration in the water purification equipment. They work together to replace manual water change, saving worry and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a sensor sealing test fixture of the utility model.

[0017] Figure 2 The utility model is a rear-view stereoscopic structural schematic diagram of a sensor sealing test fixture.

[0018] Figure 3 The utility model is a schematic diagram of the internal cross-sectional structure of a sensor sealing test fixture.

[0019] Figure 4 The utility model is a chain structure schematic diagram of a sensor sealing test fixture.

[0020] As shown in the figure: 1. Water tank, 2. Air suction port, 3. Vacuum extraction equipment, 4. Upper connecting shaft, 5. Sprocket one, 6. Lower connecting shaft, 7. Sprocket two, 8. Drive motor one, 9. Motor bracket, 10. Cross bar, 11. Clamping body, 12. Stirring equipment, 13. Water purification equipment, 14. Stirring shaft, 15. Drive motor two, 16. Water outlet pipe, 17. Rubber buffer layer, 18. Purifier, 19. Water pump, 20. Chain, 21. Stirring rod. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Combined with all the drawings, a sensor sealing test fixture includes a transparent water tank 1, a water tank cover capable of sealing the water tank 1, an air extraction port 2 located at the upper end of the water tank 1, a vacuum device 3 for vacuumizing the gas in the water tank 1, a display, an air source pressure alarm indicator, a start button, a stop button, and a vacuum valve of the vacuum device 3 capable of pressure relief. The assembly and connection can be performed according to the prior art. The utility model product is mainly improved in the water tank 1;

[0024] An upper connecting shaft 4 is sealed and rotatably connected in the water tank 1 and near the upper end. A sprocket 5 is installed at one end of the upper connecting shaft 4 located in the water tank 1. A lower connecting shaft 6 is sealed and rotatably connected in the water tank 1 and near the lower end. A sprocket 2 7 is installed on the lower connecting shaft 6. The upper connecting shaft 4 corresponds to the lower connecting shaft 6 up and down. A chain 20 is sleeved between the outer sides of the sprocket 1 5 and the sprocket 2 7. The chain 20 has a vertical transmission center distance, which is conducive to clearly observing the sensor; a driving motor 8 is provided at one end of the upper connecting shaft 4 extending out of the water tank 1, and a motor bracket 9 is fixed at the lower end of the driving motor 8. The driving motor 8 can adopt a commonly used motor, servo motor, stepping motor, reduction motor, etc. The driving motor 8 can also be connected to the lower connecting shaft 6 below, and the position is set according to practical needs;

[0025] One end of the chain 20 away from the upper connecting shaft 4 is fixedly connected to a plurality of cross bars 10, the cross bars 10 are arranged horizontally, and the free ends of the cross bars 10 are provided with U-shaped clamping bodies 11 for clamping sensors, and the inner surface of the clamping bodies 11 is provided with rubber buffer layers 17 to avoid pinching the sensors, the opening of the clamping bodies 11 is facing the horizontal direction, and the open ends of the clamping bodies 11 are slightly facing away from each other, and the width thereof is greater than the width of other parts, so that the sensors can be easily inserted from the opening of the clamping bodies 11; a movable gap is left between the stirring device 12 and the clamping body 11, leaving a space for convenient operation.

[0026] As an embodiment of the utility model, in addition to the above-mentioned structure, it also includes a stirring device 12 installed to muddy the water, including a stirring shaft 14 that is sealed and rotatably connected inside the water tank 1 and near the lower end, and a plurality of stirring rods 21 are installed on the outer side of the stirring shaft 14. A drive motor 15 is provided outside the water tank 1 and at a position corresponding to the position of the stirring shaft 14. The output shaft of the drive motor 15 is connected to one end of the stirring shaft 14 extending out of the water tank 1. The drive motor 15 is fixed outside the water tank 1. The drive motor 15 can adopt a commonly used motor, a servo motor, a stepper motor, a reduction motor, etc.

[0027] As an embodiment of the utility model, in addition to the above structure, it also includes a water purification device 13. The water purification device 13 includes a water outlet pipe 16 connected to the lower end of the water tank 1 and capable of pumping water out of the water tank 1. A solenoid valve (not shown in the figure) is provided on the water outlet pipe 16. The opening or closing of the solenoid valve makes the water outlet pipe 16 connected to or not connected to the water in the water tank. When vacuuming, the solenoid valve is closed, and the water outlet pipe 16 is connected to a purifier 18. The purifier 18 is connected to a water pump 19 through a pipeline, and the discharge end of the water pump 19 is connected to the water tank 1 through a pipeline.

[0028] As an embodiment of the product of the utility model, the outside of the clamping body 11 is provided with digital labels (not shown in the figure), and the digital labels of each clamping body 11 are different to identify which sensors have passed the detection.

[0029] During the specific implementation of the utility model, water is injected into the water tank, the water level should be lower than the air extraction hole, the water tank cover of the water tank is opened, the driving motor 1 is started with an external power supply, and the chain is driven to operate. At this time, people sequentially insert the sensor into the clamping body, suspend the driving motor 1, and then use the water tank cover to seal the water tank, and the vacuum pumping equipment extracts the water in the water tank. When the negative pressure value reaches the preset leak test pressure value, the vacuum pump of the vacuum pumping equipment is stopped, and the air tightness of the sensor is detected by observing whether there are bubbles coming out of the sensor, and then the sensor clamped by the clamping body is recorded according to the digital label on the clamping body;

[0030] After the test is completed, open the pressure relief valve of the vacuum equipment, such as the vacuum valve, to restore the vertical atmospheric pressure, then open the water tank cover and take out the sensor that has been tested;

[0031] When the water needs to be changed, the second external power supply of the driving motor can be started first to drive the stirring rod to stir the water, so that the water is in a dynamic state to avoid material precipitation. At this time, the water pump can pump the dynamic water into the water purifier for purification, and then pump the purified water into the water tank to complete the water recycling.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A sensor sealing test fixture, comprising a water tank, a water tank cover capable of sealing the water tank opening, an air extraction port located at the upper end of the water tank, a vacuum extraction device for vacuumizing the gas in the water tank, a display, an air source pressure alarm indicator, a start button, and a stop button, characterized in that: An upper connecting shaft is rotatably provided in the water tank near the upper end, a sprocket 1 is provided at one end of the upper connecting shaft located in the water tank, a lower connecting shaft is rotatably provided in the water tank near the lower end, a sprocket 2 is provided on the lower connecting shaft, the upper connecting shaft corresponds to the lower connecting shaft up and down, a chain is sleeved between the outer sides of the sprocket 1 and the sprocket 2; a driving motor 1 is provided at one end of the upper connecting shaft extending out of the water tank, a motor bracket is provided at a lower end of the driving motor; a plurality of cross bars are provided at one end of the chain away from the upper connecting shaft, a U-shaped clamping body for clamping a sensor is provided at the free end of the cross bar, the opening of the clamping body is facing the horizontal direction, a stirring device and a water purification device are provided in the water tank.

2. A sensor sealing test fixture according to claim 1, characterized in that: The stirring device includes a stirring shaft that is rotatably arranged in a water tank near the lower end, a plurality of stirring rods are arranged on the outer side of the stirring shaft, a second driving motor is arranged outside the water tank and corresponding to the position of the stirring shaft, an output shaft of the second driving motor is connected to one end of the stirring shaft extending out of the water tank, and the second driving motor is fixed outside the water tank.

3. A sensor sealing test fixture according to claim 2, characterized in that: The water purification equipment includes a water outlet pipe connected to the lower end of the water tank, a solenoid valve is provided on the water outlet pipe, the water outlet pipe is connected to a purifier, the purifier is connected to a water pump through a pipeline, and the discharge end of the water pump is connected to the water tank through a pipeline to pump purified water into the water tank.

4. A sensor sealing test fixture according to claim 3, characterized in that: The inner surface of the clamping body is provided with a rubber buffer layer.

5. A sensor sealing test fixture according to claim 4, characterized in that: The chain transmission center distance is vertical.

6. A sensor sealing test fixture according to claim 5, characterized in that: The outer edges of the clamping bodies are provided with numerical labels, and the numerical labels of each clamping body are different.

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