CN107782505A - A Proportional Valve Leakage Testing Device - Google Patents

Abstract

The invention discloses a device for detecting the sealing property of a proportional valve, which comprises a pressure regulating device, a leakage detecting device, a test interface and an outlet valve which are sequentially connected in series, wherein the test interface is connected with a bypass valve in parallel; the input end of the pressure regulating device is communicated with a high-pressure air source, and the pressure regulating device is used for regulating the output air pressure to a set value; the test interface comprises an inlet and an outlet which are respectively connected with the input end and the output end of the valve body to be tested; the outlet valve can be opened and closed; and the leakage detection device is used for detecting leakage of the valve body to be detected. After the high-pressure air source and the valve body to be tested are connected, different pressures are output through the pressure adjusting device, the sealing performance of the valve body to be tested is tested under different pressures, the whole sealing performance and partial sealing performance of the proportional valve can be automatically detected through the switch of the valve body and the matching of the bypass valve, the automation degree is high, and the working efficiency is high.

Description

A Proportional Valve Leakage Testing Device

technical field

The invention relates to a proportional valve sealing performance detection device.

Background technique

Proportional valve is a valve body commonly used in gas systems. It is very common. After the proportional valve is manufactured, it needs to be tested for its sealing and other performance. The existing proportional valve generally includes two or more sections. The sealing test of the whole body and each section is generally carried out manually in the existing testing method, which has low efficiency and high labor cost. Therefore, the present invention provides an automatic detection device for the sealing performance of proportional valves to solve the above problems.

Contents of the invention

In order to solve the above problems, the present invention provides an automatic detection device for the sealing performance of a proportional valve.

The technical solution adopted by the present invention to solve its technical problems is:

A proportional valve leak detection device, comprising:

A pressure regulating device, a leak detection device, a test port, and an outlet valve are connected in series in sequence, and the test port is connected in parallel with a bypass valve;

The input end of the pressure regulating device is connected with the high-pressure air source, and the pressure regulating device is used to adjust the output air pressure to the set value;

The test interface includes an inlet and an outlet, respectively connected to the input and output of the valve body to be tested;

The outlet valve can be opened and closed;

A leak detection device, used for leak detection of the valve body to be tested;

It also includes a workbench and a control device. The control device, pressure adjustment device, leak detection device, outlet valve, and bypass valve are all set in the workbench. The test interface is located outside the workbench. The control device controls the pressure adjustment device, leak detection device Device, outlet valve and bypass valve work.

The test interface includes at least one set of automatic docking structures, and each set of automatic docking structures corresponds to a different type of proportional valve.

The automatic docking structure includes a first docking block, a driving cylinder, and an auxiliary vertical plate. The driving cylinder and the auxiliary vertical plate are installed on the workbench, and the first docking block is installed on the output shaft of the driving cylinder. The first docking block has two One airflow channel, one end of one airflow channel is docked with the leak detection device, the other end is the inlet; the other end of the airflow channel is the outlet, and the other end is connected with the bypass valve and the outlet valve through a three-way joint, the first The docking block cooperates with the auxiliary vertical plate to form the docking and fixing of the valve body to be tested.

The automatic docking structure includes a second docking block and a third docking block, the inlet is arranged on the second docking block, the inlet is connected with the leak detection device after the extension of the second docking block, the outlet is arranged on the third docking block, and the outlet is on the After the third docking block is extended, it is connected with the bypass valve and the outlet valve through a three-way joint; the second docking block and the third docking block can move relatively to form docking and fixing of the valve body to be tested.

The pressure regulating device includes one passage or multiple passages connected in parallel, each passage is provided with a pressure regulating valve and an on-off valve connected in series, and the pressure values limited by the pressure regulating valves on different passages are different.

An oil mist filter and a pressure reducing valve are arranged between the pressure regulating device and the high-pressure gas source.

The number of passages in the pressure regulating device is set to three.

The beneficial effects of the present invention are: the control device of the present invention adopting the above-mentioned structure, the control device, the pressure regulating device, the leak detection device, the outlet valve, and the bypass valve are all arranged in the workbench, connected in advance, and the staff needs to operate Just connect the test interface with the valve body to be tested, and then carry out automatic testing through the control device; after connecting the high-pressure air source and the valve body to be tested, output different pressures through the pressure regulating device, and test the valve body to be tested under different pressures The sealing performance of the valve body, through the switch of the valve body itself and the bypass valve, can automatically detect the overall sealing performance and partial sealing performance of the proportional valve, which has a high degree of automation and high work efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is a schematic diagram of the principle of the present invention;

Fig. 2 is a structural schematic diagram of the present invention.

Detailed ways

With reference to Fig. 1 and Fig. 2, the present invention is a kind of proportional valve tightness detection device, comprises:

The pressure regulating device 1, the leak detection device 2, the test port, the outlet 6 valve 3, and the test port are connected in parallel with a bypass valve 4;

The input end of the pressure regulating device 1 communicates with the high-pressure air source 7, and the pressure regulating device 1 is used to adjust the output air pressure to a set value;

The test interface includes an inlet 5 and an outlet 6, which are respectively connected to the input end and output end of the valve body to be tested;

Outlet 6 valve 3 can be opened and closed;

Leak detection device 2, used for leak detection of the valve body to be tested;

It also includes a workbench 11 and a control device, the control device, the pressure regulating device 1, the leak detection device 2, the outlet 6 valve 3, and the bypass valve 4 are all set in the workbench 11, and the test interface is located outside the workbench 11. The device controls the work of the pressure regulating device 1, the leak detection device 2, the outlet 6 valve 3, and the bypass valve 4; the electronic control part of the valve body to be tested is connected to the control device through a plug-in connection. The control device in the present invention adopting the above structure, the control device, the pressure regulating device 1, the leak detection device 2, the outlet 6 valve 3, and the bypass valve 4 are all arranged in the workbench 11, and they are connected in advance. What the staff needs to operate is only Connect the test interface with the valve body to be tested, and then conduct an automatic test through the control device; after connecting the high-pressure gas source 7 and the valve body to be tested, output different pressures through the pressure regulating device 1, and test the valve body to be tested under different pressures. The sealing performance of the valve body is measured, and the overall sealing performance and partial sealing performance of the proportional valve 15 can be automatically detected through the switch of the valve body itself and the bypass valve 4, which has a high degree of automation and high work efficiency.

For example, if the proportional valve 15 is composed of two parts with an internal switch inside, the proportional valve 15 is installed behind the test port, by opening the internal switch and the bypass valve 4, closing the outlet 6 and valve 3, the proportional valve 15 can be tested as a whole. Leak detection; by closing the internal switch and bypass valve 4, the leak detection can be performed on the first half of the proportional valve 15; by closing the internal switch and outlet 6 valve 3, and opening the bypass valve 4, the second half of the proportional valve 15 can be tested Leak detection, detection is very convenient and fast. In addition, the present invention can be arranged in parallel to realize detection of multiple proportional valves 15 at the same time, which is highly automated.

The test interface includes at least one set of automatic docking structures, and each set of automatic docking structures corresponds to different types of proportional valves 15; The valve body to be tested, and the other set corresponds to the valve body to be tested with the input end and output end on both sides; see the following description for details.

The automatic docking structure includes a first docking block 12, a driving cylinder 14, and an auxiliary vertical plate 13. The driving cylinder 14 and the auxiliary vertical plate 13 are installed on the workbench 11, and the first docking block 12 is installed on the output shaft of the driving cylinder 14. , there are two airflow passages on the first docking block 12, one end of one airflow passage is docked with the leak detection device 2, and the other end is the inlet 5; the other end of the airflow passage is the outlet 6, and the other end passes through a tee The joint is connected with the bypass valve 4 and the outlet 6 valve 3, and the first docking block 12 cooperates with the auxiliary vertical plate 13 to form the docking and fixing of the valve body to be tested. The automatic docking structure of this structure is suitable for the valve body to be tested with the input end and the output end on the same side. Correspondingly, by driving the cylinder 14 and clamping the auxiliary vertical plate 13, and then overlapping the electronic control part of the valve body to be tested with the control device, automatic detection can be realized.

The automatic docking structure includes a second docking block 16 and a third docking block 17, the inlet 5 is arranged on the second docking block 16, the inlet 5 is connected with the leak detection device 2 after the extension of the second docking block 16, and the outlet 6 is arranged on On the third docking block 17, the outlet 6 is connected with the bypass valve 4 and the outlet 6 valve 3 through a three-way joint after the third docking block 17 extends; the second docking block 16 and the third docking block 17 can move relatively to treat The measuring valve body forms a butt joint and is fixed. The automatic docking structure of this structure is suitable for the valve body to be tested with the input end and the output end on opposite sides. The outlets 6 of the three docking blocks 17 correspond to each other, and the second docking block 16 and the third docking block 17 are driven by the cylinder or the motor screw to clamp the valve body to be tested, and then the electronic control part of the valve body to be tested is connected to the control device. Then, automatic detection can be realized.

As shown in the figure, the pressure regulating device 1 includes one passage or multiple passages connected in parallel. In this embodiment, three passages are preferred, and each passage is provided with a pressure regulating valve 8 connected in series and On-off valve 9, the pressure value that the pressure regulating valve 8 on different paths limits is different; Adjust the pressure value of each regulating valve 8 in advance before the test, can realize the rapid switching of different pressures like this, improve detection efficiency, of course, the present invention also The number of pathways can be adjusted according to actual needs, for example, it can be two, four, or five, and so on.

As shown in the figure, in order to improve the service life and detection accuracy of components, an oil mist filter 10 and a pressure reducing valve are arranged between the pressure regulating device 1 and the high-pressure gas source 7 .

The above-mentioned embodiments are only preferred versions of the present invention, and the present invention also has other implementations. Those skilled in the art can also make equivalent modifications or replacements without departing from the spirit of the present invention, and these equivalent modifications or replacements are all included within the scope set by the claims of the present application.

Claims (7)

1. A proportional valve leak detection device, characterized in that comprising: A pressure regulating device, a leak detection device, a test port, and an outlet valve are connected in series in sequence, and the test port is connected in parallel with a bypass valve; The input end of the pressure regulating device is connected with the high-pressure air source, and the pressure regulating device is used to adjust the output air pressure to the set value; The test interface includes an inlet and an outlet, respectively connected to the input and output of the valve body to be tested; The outlet valve can be opened and closed; A leak detection device, used for leak detection of the valve body to be tested; It also includes a workbench and a control device. The control device, pressure adjustment device, leak detection device, outlet valve, and bypass valve are all set in the workbench. The test interface is located outside the workbench. The control device controls the pressure adjustment device, leak detection device Device, outlet valve and bypass valve work. 2. A proportional valve leak detection device according to claim 1, characterized in that the test interface includes at least one set of automatic docking structures, and each set of automatic docking structures corresponds to a different type of proportional valve. 3. A proportional valve leak detection device according to claim 1, characterized in that the automatic docking structure includes a first docking block, a driving cylinder, and an auxiliary vertical plate, and the driving cylinder and the auxiliary vertical plate are installed on the workbench , the first docking block is installed on the output shaft of the drive cylinder, and there are two airflow passages on the first docking block, one end of one airflow passage is connected with the leak detection device, and the other end is the inlet; the other end of the airflow passage is the The outlet is described, and the other end is connected with the bypass valve and the outlet valve through a three-way joint, and the first docking block cooperates with the auxiliary vertical plate to form the docking and fixing of the valve body to be tested. 4. A proportional valve leak detection device as claimed in claim 1, characterized in that the automatic docking structure includes a second docking block and a third docking block, the inlet is arranged on the second docking block, and the inlet is on the second docking block. After the docking block is extended, it is connected with the leak detection device. The outlet is set on the third docking block. After the extension of the third docking block, the outlet is connected with the bypass valve and the outlet valve through a three-way joint; the second docking block and the third docking block It can be moved relatively to form a docking and fixing of the valve body to be tested. 5. A proportional valve leak detection device as claimed in claim 1, characterized in that said pressure regulating device comprises a passage or a plurality of passages connected in parallel, and each passage is provided with a pressure For regulating valves and switching valves, the pressure values limited by the pressure regulating valves on different channels are different. 6. A proportional valve leak detection device according to claim 1, characterized in that an oil mist filter and a pressure reducing valve are arranged between the pressure regulating device and the high-pressure gas source. 7. A proportional valve leak detection device as claimed in claim 5, characterized in that the number of passages in the pressure regulating device is set to three.