CN2233575Y - Automobile water tank dry type quick leak tester - Google Patents

Abstract

The utility model discloses a dry-type leak detector for an automobile water tank. The outlet of a pressure regulating valve 3 is connected with the inlets of two-position two-way (normally closed) solenoid valves 5 and 6, and the two-position two-way solenoid valve 5 or 6 is connected with the two-position two-way solenoid valve 5 or 6. Pressure sensor 7, two-position two-way solenoid valve (normally open) 8, differential pressure sensor 9 and quick connector 10 or 11 with check valve are connected, two-position two-way solenoid valve 6 or 5 is connected with two-position two-way solenoid valve 8. The differential pressure sensor 9 is connected to the quick joint 11 or 10 with a one-way valve. The utility model overcomes the defects of the wet leak detection method, not only improves the reliability, precision and appearance quality, saves a lot of electric energy and cost, but also measures quickly and is easy to realize automatic monitoring.

Description

Automobile water tank dry type quick leak tester

The utility model relates to a leak detector, in particular to a dry fast leak detector for an automobile water tank.

Car water tanks must be tested for sealing performance, which is an important indicator of the quality of the water tank. Domestic water tank manufacturers use the traditional inflatable water immersion method to observe the leakage of each water tank, but this human factor has a great influence on visual leak detection, which reduces the reliability of quality assurance and the accuracy is not high, and each water tank After the detection, a large amount of electric heating is required for drying, which consumes more energy, and also affects the appearance quality of the water tank, and the productivity is not high. Therefore, it is extremely necessary to change the method to detect leaks.

The purpose of the utility model is to provide a dry type rapid leak detector for an automobile water tank.

Describe below in conjunction with accompanying drawing.

Fig. 1 is a schematic diagram of a dry type rapid leak detector for an automobile water tank;

Fig. 2 is a schematic diagram of a pneumatically sealed clamping plug.

Automobile water tank dry leak detector, its pressure regulating valve 3 outlet is connected with the inlet of 2-position 2-way (normally closed) solenoid valve 5, 6, 2-position 2-way solenoid valve 5 or 6 is connected with pressure sensor 7, 2-position 2-way One-way solenoid valve (normally open) 8, differential pressure sensor 9 and quick connector 10 or 11 with one-way valve are connected, two-position two-way solenoid valve 6 or 5 is connected with two-position two-way solenoid valve 8, differential pressure sensor 9 and Connect with quick connector 11 or 10 with one-way valve. The inlet of the pressure regulating valve 3 is connected to the inlet of the pressure regulating valve 4, and the outlet of the pressure regulating valve 4 passes through the two-position three-way solenoid valve 13, the quick connectors 14, 15 with check valves and the pneumatic sealing clamping plug 16, 17 is connected, the pneumatic sealing clamping plug 16 is connected with the quick joint 10 with a one-way valve, and the pneumatic sealing clamping plug 17 is connected with the quick joint 11 with a one-way valve. The pneumatic sealing clamping plug 16 is connected with the non-leakage standard water tank 18, and the pneumatic sealing clamping plug 17 is connected with the water tank 19 to be tested. The leak-free standard water tank and the water tank to be tested are water tanks of the same model and the same volume. The failure rate caused by leakage is <1%.

The pneumatic sealing clamping plug has a pneumatic piston 25, a cylinder 24, a pneumatic piston rod 28 is arranged in the middle of the pneumatic piston, an inflatable tube is arranged in the middle of the pneumatic piston rod, and a water tank charging joint 21 is arranged at one end, a fastening nut 23, a handle 20, and a pneumatic piston Pneumatic clamping joint 22 and pneumatic inflation pipe are arranged eccentrically and communicated with the cylinder, the pneumatic piston and the inner wall of the cylinder are provided with a seal 29, the center of the cylinder top is provided with a round hole, connected with the outside of the pneumatic piston rod, and there are seals between them 26. There is a rubber stopper 27 on the outside of the pneumatic piston rod, and the other end of the pneumatic piston rod is provided with a rubber stopper fixing piece.

When the utility model works, after the normally closed valve 2 is opened, the stable pressure gas with a pressure of 0.5-0.6Mpa flows into the pipeline of the leak detector from the gas source 1. Firstly open the valve 13, so that the gas passing through the pressure regulating valve 4 and whose pressure is stable at 0.3 MPa controls the pneumatic sealing clamping plugs 16, 17 respectively, so that the water tanks 18, 19 are effectively sealed when inflated. Then, open the valves 5,6 to inflate the water tanks 18,19 through the pressure regulating valve 3 and the gas whose pressure is stabilized at 0.11MPa. Then, close valve 5 and 6, because valve 8 is in normally open state, then the air pressure of water tank 18,19 is identical, and differential pressure sensor has no signal output. When testing, close the valve 8. If there is no pressure difference between the two water tanks, it means that the two water tanks have no leakage; if there is a pressure difference signal output, it means that there is leakage. At this time, just replace a standard water tank for comparison , a correct judgment can be made.

Since 5, 6, 8, and 13 are all electromagnetic valves, and the pressure sensor can provide the gas pressure value of the measuring pipeline at any time, the whole measuring process is very easy to realize automation.

When the pneumatic seal clamps the plug head, hold the handle 20 and insert the rubber plug 27 into the inlet of the water tank 18 or 19. When the gas from the valve 13 enters the cylinder 24 through the joint 22, the pneumatic pressure is enough to make the piston 25 drive the piston rod 28 Move to the left, so that the rubber stopper 27 becomes circumferentially expanded due to axial compression, so as to achieve the purpose of sealing and clamping. The gas from valve 5 or 6 is then inflated to the water tank through the inflation pipe of joint 21 and piston pull rod 28 . When the measurement is finished, close the valve 13, so that the gas entering the cylinder 24 is discharged to the atmosphere through the joint 22 and the valve 13. At this time, the restoring force of the pneumatic sealing clamping plug 16 or 17 makes the piston 25, the pull rod 28 and the rubber stopper 27 returns to original state, then rubber stopper 27 promptly to throw off from the entrance of water tank 18 or 19.

This leak tester is based on the principle of air pressure difference to measure the sealing performance of the automobile water tank. When a non-leaking water tank and a product water tank to be tested are placed in the same pressure air circuit, they are cut off from the air source after inflation. If there is no leakage in the product water tank, there is no pressure difference between the two; if there is leakage in the product water tank, there is a pressure difference between the two, and the leakage can be accurately judged by the differential pressure gauge. If it exceeds the allowable value, it is is qualified.

The dry-type rapid leak tester for automobile water tank fundamentally overcomes the defects of the wet-type leak test method. It not only improves the reliability, accuracy and appearance quality, but also saves a lot of power and cost; it also measures quickly and is easy to realize automatic monitoring. Helps increase productivity.

Claims (4)

1. the quick leak detector of radiator dry type is characterized in that: pressure regulator valve [3] outlet is joined with bi-bit bi-pass (normally closed) solenoid valve [5], [6] import, two-position two-way solenoid valve [5] or [6] and pressure transducer [7], two-position two-way solenoid valve (often opening) [8], rapid-acting coupling [10] or [11] of differential pressure pick-up [9] and band retaining valve join, two-position two-way solenoid valve [6] or [5] and two-position two-way solenoid valve [8], rapid-acting coupling [11] or [10] of differential pressure pick-up [9] and band retaining valve join.

2. the quick leak detector of a kind of radiator dry type according to claim 1, it is characterized in that [3] import of said pressure regulator valve and pressure regulator valve [4] import join, pressure regulator valve [4] outlet is joined through rapid-acting coupling [14], [15] and pneumostop clamping chock plug [16], [17] of two-position three way magnetic valve [13] with the band retaining valve, pneumostop clamps chock plug [16] and joins with the rapid-acting coupling [10] of band retaining valve, and pneumostop clamps chock plug [17] and joins with the rapid-acting coupling [11] of band retaining valve.

3. the quick leak detector of a kind of radiator dry type according to claim 1 and 2 is characterized in that said pneumostop clamps chock plug [16] and joins with no leakage standard water tank [18], and pneumostop clamps chock plug [17] and joins with water tank to be measured [19]

4. the quick leak detector of a kind of radiator dry type according to claim 1 and 2, it is characterized in that said pneumostop clamps chock plug and has pneumatic piston [25], cylinder [24], be provided with pneumatic piston pull bar [28] in the middle of the pneumatic piston, in the middle of the pneumatic piston pull bar is gas-filled tube, one end is provided with water tank gas-charging connection [21], tighten up nut [23], handle [20], pneumatic piston off-centre is provided with pneumatic pinch joint [22] and pneumatic gas-filled tube, and communicate with cylinder, pneumatic piston and cylinder inner wall are provided with seal [29], the cylinder top center is provided with circular hole and outer survey of pneumatic piston pull bar joined, be provided with seal [26] each other, the pneumatic piston pull bar outside is with rubber stopper [27], and the pneumatic piston pull bar other end is provided with the rubber stopper fixture.

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