A factory inspection device for pneumatic one-way valves with a portable reverse opening function

Abstract

The present invention proposes a factory inspection device for pneumatic one-way valves with a portable reverse opening function, comprising: a detection control panel consisting of a pressure adjustment unit, a manual valve unit and a fixed test unit fixedly arranged on a workbench; the manual valve unit is connected to the pressure adjustment unit; the pressure adjustment unit is used to provide the required test pressure for the fixed test unit; the pressure control and output unit receives the test pressure from the pressure adjustment unit and transmits it to the fixed test unit; the button control panel is connected to the pressure control and output unit, and the pressure control and output unit is adjusted to provide the test pressure for the fixed test unit. The present invention completes the detection of sealing and reverse opening function under preset pressure conditions by setting the pressure adjustment unit to adjust the test pressure and output it to the fixed test unit through the pressure control and output unit, and completes the detection of the one-way valve, thereby reducing the time for the one-way valve detection and reducing the detection difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic one-way valve detection with a reverse opening function, in particular to a pneumatic portable pneumatic one-way valve factory detection device with a portable reverse opening function. Background Art

[0002] The pneumatic one-way valve with reverse opening function can only allow compressed air to flow in a single direction, and cannot flow back in the reverse direction. If reverse opening is required, other mechanisms must be used to control the opening. The application field is very wide. This type of one-way valve needs to be tested after production, and the test frequency is 100%. In order to ensure the full function test of the pneumatic one-way valve with reverse opening function, there is currently no professional testing equipment, and a single manual pneumatic test circuit plus manual testing is used; resulting in a long test time and poor accuracy. With the continuous development of society and the increase in labor costs, it cannot meet the needs of social development. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing single manual pneumatic detection circuit plus manual detection. The present invention proposes a pneumatic one-way valve factory detection device with a portable reverse opening function, which shortens the detection time of the pneumatic one-way valve with a reverse opening function, reduces the detection difficulty, and is very convenient to carry due to its small size.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pneumatic one-way valve factory detection device with a portable reverse opening function, comprising:

[0005] The detection control panel is composed of a pressure adjustment unit, a manual valve unit and a fixed test unit fixedly arranged on the workbench; the air inlet of the manual valve unit is connected with the pressure adjustment unit and controls the fixed test unit; the pressure adjustment unit is used to provide the required test pressure for the fixed test unit;

[0006] The pressure control and output unit receives the test pressure from the pressure adjustment unit and transmits it to the fixed test unit;

[0007] A button control panel, wherein buttons arranged on the button control panel regulate the pressure control and output unit to provide various test and control pressures for the fixed test unit;

[0008] The pressure display detection unit includes seven pressure gauges arranged side by side on the workbench, five of the pressure gauges are connected to the input end and the output end of the pressure adjustment unit, and are used to monitor the size of the test pressure entering the pressure adjustment unit and output from the pressure adjustment unit, and two of the pressure gauges are connected to the fixed test unit, and are used to monitor the direction and size of the test pressure entering the fixed test unit.

[0009] Furthermore, the pressure adjustment unit includes a high-pressure regulating valve and three precision pressure regulating valves, and also includes a combined splint, an air path is opened through the length direction of the combined splint, the high-pressure regulating valve and the precision pressure regulating valve are connected to the combined splint by through-plate screws; and splints are added to the input end of the high-pressure regulating valve and the output end of the precision pressure regulating valve, and the splints are also fixed on the workbench by through-plate screws.

[0010] Furthermore, the one-way valve fixing test unit includes a clamping cylinder and an ejecting cylinder arranged opposite to each other on the workbench, the clamping cylinder and the ejecting cylinder are located on the same axis, the one-way valve to be tested can be fixed between the clamping cylinder and the ejecting cylinder, and an air circuit for providing a test pressure for the one-way valve is provided on the side of the clamping cylinder and the ejecting cylinder facing the one-way valve, and the air circuit is connected to the output end of the pressure control and output unit.

[0011] Furthermore, the ejection cylinder includes an ejection cylinder body, a piston push rod and a rear cover. A groove body is opened in the ejection cylinder body for the piston push rod to reciprocate. The piston push rod is movably fixed in the groove body by the rear cover. A first air supply pipeline is opened in the thickness direction of the ejection cylinder body, and the output end of the first air supply pipeline is close to the end of the piston push rod.

[0012] Furthermore, the piston push rod is a stepped structure, including a push rod section, a rod body section and a force-bearing section, and the diameters of the push rod section, the rod body section and the force-bearing section increase successively; the trough body includes a first trough body section and a second trough body section, the first trough body section has the same width as the rod body section, the second trough body section has the same width as the force-bearing section, and the length of the second trough body section is greater than the length of the force-bearing section, and the output end of the first gas pipeline is located above the first trough body section.

[0013] Furthermore, the length of the push rod section is the same as the minimum opening stroke of the one-way valve being tested.

[0014] Furthermore, a sealing ring and a guide sleeve are fixedly provided on the outer edge of the force-bearing section; a second air pipeline is opened through the thickness direction of the cylinder body, and the output end of the second air pipeline is located on the second groove section; a third air pipeline is opened in the rear cover, and the output end of the third air pipeline faces the piston push rod.

[0015] Furthermore, the clamping cylinder comprises a clamping cylinder body, a front cover, a piston and a piston rod. The clamping cylinder body is a hollow structure and is closed by the front cover. The piston is located in the clamping cylinder body. The piston rod penetrates the thickness direction of the front cover and is fixedly connected to the clamping cylinder body. A clamping head for cooperating with the ejection cylinder to fix the one-way valve is fixed at the other end of the piston rod.

[0016] A fourth air supply pipeline is opened in the clamping head, the output end of the fourth air supply pipeline faces the ejection cylinder, the input end of the fourth air supply pipeline is located on the outer edge surface of the clamping head, and an end straight-through joint is fixedly provided on the side of the clamping head based on the input end of the fourth air outlet pipeline.

[0017] Furthermore, the pressure control and output unit includes a base plate and two groups of combined valve islands fixedly arranged on the base plate, each group of combined valve islands consists of an air path channel arranged in the base plate and four two-position two-way solenoid valves, and the two-position two-way solenoid valves are all controlled by separate circuits;

[0018] Each group of the combined valve islands includes a two-position two-way solenoid valve for pressure release and three two-position two-way solenoid valves for pressure output, and the input ends of the two-position two-way solenoid valves for pressure release and the output ends of the two-position two-way solenoid valves for pressure output are both connected to the gas path;

[0019] The output end of the two-position two-way solenoid valve for pressure release is connected to the exhaust port fixedly arranged on the workbench, and the test pressure is supplied to the first gas pipeline or the fourth gas pipeline through the respective gas channels by the combined valve island.

[0020] Furthermore, it also includes a power supply and a wiring groove, the power supply is connected to the two-position two-way solenoid valve, and the wiring harness used for connection is arranged in the wiring groove; the button control panel includes a plurality of control buttons, the number of which is not less than the number of the two-position two-way solenoid valves, and is used to control the on and off of the two-position two-way solenoid valves.

[0021] Compared with the prior art, the beneficial effects of the present invention include: after adjusting different test pressures through the provided pressure adjustment unit, the pressure control and output unit outputs the pressure to the fixed test unit, providing test pressures for both sides of the one-way valve to be tested, thereby completing the one-way valve detection process. During the detection process, different test pressures are provided for both ends of the one-way valve to be tested through the first gas pipeline and the fourth gas pipeline opened in the fixed test unit, and there is no need to change the direction of the one-way valve during the test. The test process is completely controlled by the button control panel, which is simple and efficient, and the loading process can also be automatically carried out in conjunction with related equipment, converting the original semi-automatic test process into a fully automatic one, effectively reducing labor costs while reducing the difficulty of testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 The cross-sectional structure of a pneumatic one-way valve factory inspection device with a portable reverse opening function is schematically shown;

[0024] Figure 2 The schematic diagram shows the top view of the factory inspection device for a pneumatic one-way valve with a reverse opening function;

[0025] Figure 3 The overall structure of the pressure adjustment unit is schematically shown;

[0026] Figure 4 The cross-sectional structure of a pneumatic one-way valve fixed test unit with reverse opening function is schematically shown;

[0027] Figure 5 The schematic diagram shows the main structure of the pressure control and output unit.

[0028] Figure 6 The overall structure of the combined valve island is schematically shown;

[0029] Figure 7 The circuit structure of the pressure control and output unit is schematically shown;

[0030] Figure 8 The schematic diagram shows the pneumatic circuit principle structure of the pneumatic one-way valve factory inspection device with a portable reverse opening function.

[0031] Numbers in the figure:

[0032] 1- Check the control panel;

[0033] 11- Workbench;

[0034] 12-pressure regulating unit, 121-high pressure regulating valve, 122-first precision pressure regulating valve, 123-second precision pressure regulating valve, 124-third precision pressure regulating valve, 125-combination clamp;

[0035] 13-Manual valve unit;

[0036] 14-Fixed test unit;

[0037] 141-pressing cylinder, 1411-pressing cylinder body, 1412-front cover, 1413-piston rod, 1414-fourth gas pipeline, 1415-pressing head;

[0038] 142- ejection cylinder, 1421- ejection cylinder body, 1422- piston ejector rod, 14221- ejector rod section, 14222- rod body section, 14223- force section, 1423- rear cover, 1424- first gas pipeline, 1425- second gas pipeline, 1426- third gas pipeline;

[0039] 2-pressure control and output unit, 21-base plate, 22-combination valve island, 221-two-position two-way solenoid valve, 222-gas channel, 23-power supply, 24-wiring groove;

[0040] 3-button control panel, 31-control buttons. DETAILED DESCRIPTION

[0041] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0042] Figure 1 The schematic diagram shows the cross-sectional structure of the factory inspection device for pneumatic one-way valves with a portable reverse opening function. Figure 2 The schematic diagram shows the top view of the pneumatic one-way valve factory inspection device with a portable reverse opening function.

[0043] Combination Figure 1 as well as Figure 2 , a factory inspection device for pneumatic one-way valves with a portable reverse opening function, comprising:

[0044] The detection control panel 1 is composed of a pressure adjustment unit 12, a manual valve unit 13 and a fixed test unit 14 fixedly arranged on a workbench 11; the manual valve unit 13 is connected with the pressure adjustment unit 12 and the gas container, and is used for outputting and storing the test pressure;

[0045] The pressure control and output unit 2 receives the test pressure from the pressure adjustment unit 12 and transmits it to the fixed test unit 14;

[0046] The button control panel 3 is connected to the pressure control and output unit 2 and is used to adjust the pressure control and output unit 2 to provide the test pressure for the fixed test unit 14 .

[0047] Figure 3 The overall structure of the pressure adjustment unit 12 is schematically shown. Figure 3 The pressure regulating unit 12 will be described in detail.

[0048] A test pressure adjustment unit 12 is used to provide different pressure outputs and adjust the output pressure, including a console and a high-pressure regulating valve 121 and three precision pressure regulating valves arranged on the console, including a first precision pressure regulating valve 122, a second precision pressure regulating valve 123 and a third precision pressure regulating valve 124, and also includes a combined clamping plate 125, and a gas path channel 222 is opened in the length direction of the combined clamping plate 125, and the second precision pressure regulating valve 123, the third precision pressure regulating valve 124 and the high-pressure regulating valve 121 are connected to the control console. It is arranged on the same side of the aforementioned combined splint 125, while the first precision pressure regulating valve 122 is fixedly arranged on the other side of the combined splint 125, and the high-pressure regulating valve 121, the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124 are connected and connected with the aforementioned combined splint 125 through the through-plate screws, and the aforementioned gas path is adjusted to the combined splint 125, and a gas path channel 222 is opened therein to replace the aforementioned pipeline, so that the arrangement of the high-pressure regulating valve 121 and several precision pressure regulating valves is more compact and reasonable. When in use, after the high-pressure regulating valve 121 initially adjusts the test pressure, it is transmitted to the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124 through the combined splint to complete the pressure adjustment and then output the corresponding test pressure.

[0049] It is worth mentioning that a clamp is added to the input end of the aforementioned high-pressure regulating valve 121 and the output ends of several precision pressure regulating valves, and the clamp is also fixed on the aforementioned high-pressure regulating valve 121 and the precision pressure regulating valve by through-plate screws. Through the through-plate screws and the clamp, the input end of the high-pressure regulating valve 121 and the output ends of the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124 can be turned by the clamp, so that the test pressure adjustment unit 12 is set on the console, and the pipelines involved are buried under the console, realizing a simple layout on the surface of the console.

[0050] After the air intake is completed at the input end of the aforementioned high-pressure regulating valve 121, the test pressure is initially adjusted by the high-pressure regulating valve 121 and then output to the combined clamping plate 125. Then, the test pressure flowing in the combined clamping plate 125 is further adjusted and output by the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124.

[0051] For example, in some embodiments, the test pressure entering the high-pressure regulating valve 121 is 1.25-1.5 MPa, and the test pressure flowing through the combined clamping plate 125 after being adjusted by the high-pressure regulating valve 121 is about 1.0 MPa, and then the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124 adjust the output test pressure to 0.8 MPa, 0.35 MPa and 0.02 MPa respectively. The aforementioned test pressure adjustment process is only one embodiment of the present invention. When another test pressure adjustment needs to be completed, it is only necessary to replace or adjust the high-pressure regulating valve 121, the first precision pressure regulating valve 122, the second precision pressure regulating valve 123 and the third precision pressure regulating valve 124 involved. The input end of the high-pressure regulating valve 121 is NY, the output end of the first precision pressure regulating valve 122 is DY, the output end of the second precision pressure regulating valve 123 is CY, the third precision pressure regulating valve 124 is LY, and the gas path 222 opened in the combined clamping plate 122 is HY.

[0052] Figure 4 The cross-sectional structure of the one-way valve fixing test unit 14 is schematically shown. Figure 4 The one-way valve fixing test unit 14 will be described in detail.

[0053] A one-way valve fixing test module includes a workbench 11 and a clamping cylinder 141 and an ejecting cylinder 142 arranged opposite to each other on the workbench 11, wherein the clamping cylinder 141 and the ejecting cylinder 142 are located on the same axis, and the one-way valve to be tested is located between the clamping cylinder 141 and the ejecting cylinder 142, and is fixed by the clamping cylinder 141 and the ejecting cylinder 142, and air circuits for providing test pressure for the one-way valve are arranged on the side of the clamping cylinder 141 and the ejecting cylinder 142 facing the one-way valve.

[0054] The ejection cylinder 142 is described in detail below. The ejection cylinder 142 includes an ejection cylinder body 1421, a piston push rod 1422 and a rear cover 1423. A groove body is provided in the ejection cylinder body 1421 for the piston push rod 1422 to reciprocate. The piston push rod 1422 is movably fixed in the groove body through the rear cover 1423. A first gas pipeline 1424 is provided in the thickness direction of the ejection cylinder body 1421. The first gas pipeline 1424 is close to the end of the piston push rod 1422. The first gas pipeline 1424 can provide a test pressure for the one-way valve under test based on the end of the piston push rod 1422, thereby completing part of the test process.

[0055] The piston push rod 1422 is a stepped structure, including a push rod section 14221, a rod section 14222 and a force section 14223. The diameters of the push rod section 14221, the rod section 14222 and the force section 14223 increase in sequence. The groove body includes a first groove body section and a second groove body section. The first groove body section and the rod section 14222 have the same width, so that the rod section 14222 of the piston push rod 1422 can reciprocate in the first groove body section. The first slot section can be used to limit the position; the second slot section is the same width as the force section 14223, and the length of the second slot section is greater than the length of the force section 14223, so that the slot can meet the movement requirements of the push rod section 14221, the rod section 14222 and the force section 14223 of the piston push rod 1422, and the output end of the first gas pipeline 1424 is located above the first slot section, and provides test pressure for the one-way valve when the ejection cylinder 142 does not apply pressure to the one-way valve. Among them, the length of the push rod section 14221 should be equal to the stroke of the one-way valve to be tested, so that the push rod section 14221 can fully open the one-way valve to be tested when the piston push rod is at the leftmost position, so that the test pressure is supplied to the one-way valve to be tested through the first gas pipeline 1424 arranged therein.

[0056] It is worth noting that a second gas pipeline 1425 is provided in the thickness direction of the cylinder body, and the output end of the second gas pipeline 1425 is located on the second slot body section, which is used to supply pressure to the rod body section 14222 of the piston push rod 1422, thereby pushing the piston push rod 1422 to the side away from the pressing cylinder 141; and a third gas pipeline 1426 is provided in the rear cover 1423, and the output end of the third gas pipeline 1426 faces the piston push rod 1422, which is used to provide pressure to the end of the piston push rod 1422, thereby pushing the piston push rod 1422 to move in the direction close to the pressing cylinder 141. In order to ensure the air tightness in the slot body, especially the air tightness of the second slot body section, a sealing ring and a guide sleeve are fixedly provided on the outer edge of the force section 14223, which are used to ensure the reciprocating motion of the piston push rod 1422 in the slot body under the control of the second gas pipeline 1425 and the third gas pipeline 1426.

[0057] The clamping cylinder 141 is described in detail below. The clamping cylinder 141 includes a clamping cylinder body 1411, a front cover 1412, a piston and a piston rod 1413. The clamping cylinder body 1411 is a hollow structure, and the clamping cylinder body 1411 is closed by the front cover 1412. The piston is located in the clamping cylinder body 1411. The piston rod 1413 penetrates the thickness direction of the front cover 1412 and is fixedly connected to the clamping cylinder body 1411. A clamping head 1415 for cooperating with the ejection cylinder 142 to fix the one-way valve is fixed at the other end of the piston rod 1413.

[0058] A fourth air pipeline 1414 is provided in the aforementioned clamping head 1415, and the output end of the fourth air pipeline 1414 faces the ejection cylinder 142, and the input end of the fourth air pipeline 1414 is located on the outer edge surface of the clamping head 1415. Based on the input end of the fourth air pipeline 1414, an end straight-through joint is fixedly provided on the side of the clamping head 1415. The end straight-through joint is used to provide test pressure for the one-way valve clamped and fixed by the clamping cylinder 141 and the ejection cylinder 142 through the fourth air pipeline 1414 to complete the testing process.

[0059] After the one-way valve is fixed by the clamping cylinder 141 and the ejecting cylinder 142, the first air supply pipeline 1424 and the fourth air supply pipeline 1414 are used to complete the forward and reverse air tightness test process for the one-way valve, and the second air supply pipeline 1425 and the third air supply pipeline 1426 are used to regulate the forward and backward movement of the ejecting cylinder 142, which helps to ensure that the test conditions of the one-way valve test process are consistent, and the test process can be fully mechanized and controlled without manual intervention. The input ends of the aforementioned first gas pipeline 1424 and the fourth gas pipeline 1414 are connected to the output end of the pressure control and output unit 2, while the second gas pipeline 1425 and the third gas pipeline 1426 can be regulated by separate gas circuit regulation or by being connected to the pressure control and output unit 2. The pressure applied in the second gas pipeline 1425 and the third gas pipeline 1426 is not limited in the present invention, and only needs to be able to push the aforementioned piston push rod 1422 to reciprocate. The aforementioned first gas pipeline 1424 is recorded as dd, and the fourth gas pipeline 141 is recorded as cc.

[0060] The manual valve unit 13 is described in detail below. The manual valve unit 13 is composed of two manual valves, wherein the manual valves are two-position two-way valve bodies, both of which are connected to the gas container.

[0061] The aforementioned manual valve includes a first manual valve and a second manual valve. The first manual valve is connected to the output end (DY) of the first precision pressure regulating valve 122. After the test pressure adjusted by the first precision pressure regulating valve 122 is input into the first manual valve, the first manual valve is used to adjust the reciprocating motion of the clamping cylinder 141 or the ejecting cylinder 142. The second manual valve is connected to the output end (CY) of the second precision pressure regulating valve 123. After the test pressure adjusted by the second precision pressure regulating valve 123 is input into the second manual valve, the reciprocating motion of the remaining one of the clamping cylinder 141 or the ejecting cylinder 142 is adjusted by the second manual valve. Taking the second manual valve adjusting the reciprocating motion of the ejection cylinder as an example, the two output ends of the second manual valve are connected to the second air supply pipeline 1425 and the third air supply pipeline 1426 respectively. The normal state of the second manual valve is used to ensure that the piston push rod 1422 in the ejection cylinder 142 is located at the rear side of the ejection cylinder body 1421. When the second manual valve is switched, the ejection cylinder 142 is used to adjust the one-way valve to an open state. Similarly, the first manual valve is used for the clamping and releasing actions of the clamping cylinder.

[0062] Figure 5 The main structure of the pressure control and output unit 2 is schematically shown. Figure 6 The overall structure of the combined valve island 22 is schematically shown. Figure 7 The schematic diagram shows the circuit structure of the pressure control and output unit 2; Figure 5-7 The pressure control and output unit 2 will be described in detail.

[0063] A pressure control and output unit 2 includes a base plate 21, on which two groups of combined valve islands 22 are fixedly arranged. The combined valve island 22 consists of four two-position two-way solenoid valves 221 and an air path 222. The four two-position two-way solenoid valves 221 are all connected to the air path 222, that is, the aforementioned four two-position two-way solenoid valves 221 are in a parallel state, and the aforementioned air path 222 is arranged in the base plate 21. The two-position two-way solenoid valve 221 is opened and closed by a separate circuit, and is supplemented by an indicator light to indicate the open and closed state.

[0064] The combination valve island 22 is described in detail below. The aforementioned four two-position two-way solenoid valves 221 are arranged in a side-by-side manner on the bottom plate 21. In each group of combination valve islands 22, the aforementioned four two-position two-way solenoid valves 221 have their working pressures gradually increased from left to right or from right to left. For example, based on the adjustment and output of the test pressure by the test pressure adjustment unit 12 in the aforementioned embodiment, the first two-position two-way solenoid valve 221 on the far left is a deflation solenoid valve, the working pressure of the second two-position two-way solenoid valve 221 on the left is 0.02MPa, and the working pressure of the third two-position two-way solenoid valve 221 on the left is 0.02MPa. The pressure is 1MPa, and the working pressure of the fourth two-position two-way solenoid valve 221 on the left is 1.5MPa, which is used to regulate the withstand voltage test process, high pressure test process, low pressure test process and deflation process, that is, when the output working pressure is 1.5MPa, it is the withstand voltage test process; when the output working pressure is 1MPa, it is the high pressure test process; when the output working pressure is 0.02MPa, it is the low pressure test process; the remaining two-position two-way solenoid valve is used to regulate the deflation process, which is connected to the exhaust hole opened on the workbench. It should be noted that the connection of the four two-position two-way solenoid valves 221 located in each group of combined valve islands 22 can be changed, and it is only necessary to ensure that it can regulate the withstand voltage test process, high pressure test process, low pressure test process and deflation process.

[0065] The aforementioned air path channel 222 is opened based on the width direction of the base plate 21 and one end of the air path channel 222 passes through the side of the base plate 21, and a side three-way quick-plug is fixedly arranged on the side of the base plate 21, which serves as the output end of the combination valve island 22 and is used to output pressure to the outside; one end of the aforementioned two-position two-way solenoid valve 221 is connected to the air path channel 222, and the other end is connected to a straight-through quick-plug, which is used to receive pressure and regulate the output pressure entering the air path channel 222 by regulating the opening and closing of the two-position two-way solenoid valve 221 in the combination valve island 22.

[0066] It is worth noting that the aforementioned combination valve islands 22 are in two groups, and the two groups of combination valve islands 22 are symmetrically distributed on the bottom plate 21 based on the center line of the bottom plate 21. It also includes a power supply 23 and a wiring trough 24. The power supply 23 is connected to a plurality of two-position two-way solenoid valves 221 for powering the exhaust gas, and the wiring harness for connection is arranged in the wiring trough 24. The aforementioned two groups of combination valve islands are symmetrically distributed on the bottom plate 21, the side three-way quick plug on the left side of the bottom plate 21 is marked as CC, and the side three-way quick plug on the right side of the bottom plate 21 is marked as DD. The aforementioned CC is connected to the fourth gas pipeline 1414 for inputting the test pressure in one direction of the one-way valve under test, and DD is connected to the first gas pipeline 1424 for inputting the test pressure in the other direction of the one-way valve under test.

[0067] The pressure control and output unit 2 is applied to the factory inspection of the one-way valve. Through the side three-way quick-plug, on the one hand, the inspection pressure is provided for the one-way valve, and on the other hand, the output pressure can be synchronously detected to determine whether there is a fault in the pressure control and output unit 2. A plurality of two-position two-way solenoid valves 221 are connected in parallel, and the pressure control and output are completed by means of two-position two-way solenoid valves 221 with different working pressures, thereby ensuring the accuracy and consistency of the factory inspection of the one-way valve.

[0068] In order to reduce the difficulty of assembling the one-way valve factory inspection device, the aforementioned pressure control and output unit 2 can be fixedly set under the workbench 11, and the detection control panel 1 can be arranged on the workbench 11. By arranging end straight-through quick-connect connectors and three-way quick-connect plugs under the workbench 11, the pressure adjustment unit 12, the manual valve unit 13, the fixed test unit 14 and the pressure control and output unit 2 are connected.

[0069] In order to facilitate the monitoring of the one-way valve factory inspection process, a pressure display detection unit is also provided on the workbench 11, including seven pressure gauges. The seven pressure gauges are arranged side by side on the rear side of the one-way valve fixed test module on the workbench 11, and are respectively marked as CC, DD, LY, DY, CY, HY and NY from left to right. The connection of the aforementioned pressure gauges is described in detail below.

[0070] That is, the side three-way quick-connect connector located on the left side of the bottom plate is connected to the fourth gas pipeline 1414 and is connected to a pressure gauge marked as CC for monitoring the magnitude of the test pressure input to one end of the one-way valve under test; and the side three-way quick-connect connector located on the right side of the bottom plate is connected to the first gas pipeline 1424 and is connected to a pressure gauge marked as DD for monitoring the magnitude of the test pressure input to the other end of the one-way valve under test.

[0071] The input end of the aforementioned precision pressure regulating valve 121 is connected to the pressure-resistant solenoid valve and is connected to a pressure gauge marked NY, which is used to monitor the test pressure entering the pressure adjustment unit 2 and the pressure-resistant solenoid valve; the output end of the aforementioned combined clamping plate 125 is connected to the high-pressure solenoid valve and is connected to a pressure gauge marked HY, which is used to monitor the test pressure entering between the clamping cylinder 141 and the ejecting cylinder 142; the output end of the aforementioned second precision pressure regulating valve 123 is connected to the low-pressure solenoid valve and is connected to a pressure gauge marked CY, which is used to monitor the test pressure entering between the clamping cylinder 141 and the ejecting cylinder 142. The size of the test pressure between the air cylinder 142; the output end of the aforementioned first precision pressure regulating valve 122 is connected to the first manual valve and is connected to a pressure gauge marked as CY to monitor the test pressure entering the clamping cylinder 141 for regulating the reciprocating motion of the piston rod 1413 and the piston in the clamping cylinder body 1411; the output end of the aforementioned third precision pressure regulating valve 124 is connected to the second manual valve and is connected to a pressure gauge marked as DY to monitor the test pressure entering the ejection cylinder 142 for regulating the reciprocating motion of the piston push rod 1422 in the ejection cylinder body 1421.

[0072] The button control panel 3 is described in detail below. The button control panel 3 includes a plurality of control buttons 31, the number of which is not less than the number of the two-position two-way solenoid valves 221, that is, it should have at least the same number of buttons as the two-position two-way solenoid valves 221, and also includes an emergency stop button, which is used to power off the entire one-way valve factory inspection device, and the two-position two-way solenoid valve 221 is controlled by the buttons equal to the number of the two-position two-way solenoid valves 221, thereby completing the control of the one-way valve inspection process. In order to facilitate the judgment of the power-on state of the two-position two-way solenoid valve 221, an indicator light may also be provided.

[0073] Figure 8 The schematic diagram shows the gas circuit principle structure of the pneumatic one-way valve factory inspection device with a portable reverse opening function. Figure 8As shown, the pressure regulating unit 12 is used to adjust different test pressures, and then the pressure control and output unit 2 is used to output to the fixed test unit 14, so as to provide test pressure for the two-way one-way valve to be tested, thereby completing the one-way valve testing process. During the testing process, the second precision pressure regulating valve 123 in the pressure regulating unit 12 provides a power source for the left and right reciprocating motion of the clamping cylinder 141 in the fixed test unit 14 through the first manual valve, and the first precision pressure regulating valve 122 in the pressure regulating unit 12 provides a power source for the left and right reciprocating motion of the ejection cylinder 142 in the fixed test unit 14 through the second manual valve, thereby regulating the approach and distance movement between the clamping cylinder 141 and the ejection cylinder 142, so as to fix the one-way valve to be tested between the clamping cylinder 141 and the ejection cylinder 142. Afterwards, the four two-position two-way solenoid valves in the pressure control and output unit 2 are used to provide different test pressures for the first air supply pipeline 1424 and the fourth air supply pipeline 1414 opened in the fixed test unit 14, and for the two ends of the one-way valve to be tested fixed between the clamping cylinder 141 and the ejection cylinder 142. At the same time, the push rod section 14221 of the piston push rod 1422 in the ejection cylinder 142 can be used to open the one-way valve. During the test, there is no need to reverse the one-way valve to be tested. The test process is completely controlled by the button control panel 3 and the manual valve unit, which is simple and efficient. The loading process can also be automatically carried out in conjunction with relevant equipment, and the original semi-automatic test process is converted into a fully automatic process, which effectively reduces the labor cost and the test difficulty.

[0074] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A portable pneumatic one-way valve factory inspection device with reverse opening function, characterized in that: include: A detection control panel (1) is composed of a pressure adjustment unit (12), a manual valve unit (13) and a fixed test unit (14) which are fixedly arranged on a workbench; the air intake of the manual valve unit (13) is connected to the pressure adjustment unit (12) and controls the fixed test unit (14); the pressure adjustment unit (12) is used to provide the required test pressure for the fixed test unit (14); The pressure control and output unit (2) receives the test pressure from the pressure adjustment unit (12) and transmits it to the fixed test unit (14); A button control panel (3), wherein buttons arranged on the button control panel (3) regulate the pressure control and output unit (2) to provide various types of testing and control pressures for the fixed testing unit (14); The pressure display detection unit comprises seven pressure gauges arranged side by side on the workbench, five of the pressure gauges being connected to the input end and the output end of the pressure adjustment unit (12) for monitoring the magnitude of the test pressure entering the pressure adjustment unit (12) and being output from the pressure adjustment unit (12), and two of the pressure gauges being connected to the fixed test unit (14) for monitoring the direction and magnitude of the test pressure entering the fixed test unit (14).

2. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 1 is characterized in that: The pressure adjustment unit (12) includes a high-pressure regulating valve (121) and three precision pressure regulating valves, and also includes a combined clamping plate (125). An air path (222) is opened in the length direction of the combined clamping plate (125). The high-pressure regulating valve (121) and the precision pressure regulating valve are connected to the combined clamping plate (125) by through-plate screws. Clamps are additionally provided at the input end of the high-pressure regulating valve (121) and the output end of the precision pressure regulating valve, and the clamps are also fixed on the workbench by through-plate screws.

3. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 1 is characterized in that: The one-way valve fixing test unit (14) comprises a pressing cylinder (141) and an ejecting cylinder (142) which are arranged opposite to each other on the workbench. The pressing cylinder (141) and the ejecting cylinder (142) are located on the same axis. The one-way valve to be tested can be fixed between the pressing cylinder (141) and the ejecting cylinder (142). An air circuit for providing a test pressure for the one-way valve is arranged on the pressing cylinder (141) and the ejecting cylinder (142) facing the one-way valve. The air circuit is connected to the output end of the pressure control and output unit (2).

4. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 3 is characterized in that: The ejection cylinder (142) comprises an ejection cylinder body (1421), a piston push rod (1422) and a rear cover (1423). A groove body for the piston push rod (1422) to reciprocate is provided in the ejection cylinder body (1421). The piston push rod (1422) is movably fixed in the groove body by the rear cover (1423). A first air supply pipeline (1424) is provided in the thickness direction of the ejection cylinder body (1421). The output end of the first air supply pipeline (1424) is close to the end of the piston push rod (1422).

5. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 4 is characterized in that: The piston push rod (1422) is of a stepped structure, comprising a push rod section (14221), a rod section (14222) and a force-bearing section (14223), wherein the diameters of the push rod section (14221), the rod section (14222) and the force-bearing section (14223) increase successively; the trough body comprises a first trough body section and a second trough body section, wherein the first trough body section has the same width as the rod section (14222), the second trough body section has the same width as the force-bearing section (14223), and the length of the second trough body section is greater than the length of the force-bearing section (14223), and the output end of the first gas transmission pipeline (1424) is located above the first trough body section.

6. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 5 is characterized in that: The length of the push rod section (14221) is the same as the minimum opening stroke of the one-way valve being tested.

7. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 5 is characterized in that: A sealing ring and a guide sleeve are fixedly arranged on the outer edge of the force-bearing section (14223); a second air pipeline (1425) is opened through the thickness direction of the cylinder body, and the output end of the second air pipeline (1425) is located on the second groove section; a third air pipeline (1426) is opened in the rear cover (1423), and the output end of the third air pipeline (1426) faces the piston push rod (1422).

8. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 4 is characterized in that: The clamping cylinder (141) comprises a clamping cylinder body (1411), a front cover (1412), a piston and a piston rod (1413); the clamping cylinder body (1411) is a hollow structure and is sealed by the front cover (1412); the piston is located in the clamping cylinder body (1411); the piston rod (1413) penetrates the thickness direction of the front cover (1412) and is fixedly connected to the clamping cylinder body (1411); a clamping head (1415) for cooperating with the ejection cylinder (142) to fix the one-way valve is fixed at the other end of the piston rod (1413); A fourth air supply pipeline (1414) is provided in the clamping head (1415), the output end of the fourth air supply pipeline (1414) faces the ejection cylinder (142), and the input end of the fourth air supply pipeline (1414) is located on the outer edge surface of the clamping head (1415). Based on the input end of the fourth air outlet pipeline, an end straight-through joint is fixedly provided on the side of the clamping head (1415).

9. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 8 is characterized in that: The pressure control and output unit (2) comprises a base plate (21) and two groups of combined valve islands (22) fixedly arranged on the base plate (21), each group of combined valve islands comprising an air path (222) arranged in the base plate (21) and four two-position two-way solenoid valves (221), each of the two-position two-way solenoid valves (221) being controlled by a separate circuit; Each group of the combined valve islands includes a two-position two-way solenoid valve (221) for pressure release and three two-position two-way solenoid valves (221) for pressure output, and the input ends of the two-position two-way solenoid valves (221) for pressure release and the output ends of the two-position two-way solenoid valves (221) for pressure output are both in communication with the gas path (222); The output end of the two-position two-way solenoid valve (221) for pressure release is connected to an exhaust port fixedly arranged on the workbench (11), and the test pressure is supplied from the combined valve island (22) to the first gas pipeline (1424) or the fourth gas pipeline (1414) through the respective gas passages (222).

10. The portable pneumatic one-way valve factory inspection device with reverse opening function according to claim 9, characterized in that: It also includes a power source (23) and a wiring groove (24), wherein the power source (23) is connected to a two-position two-way solenoid valve (221), and a wiring harness for the connection is arranged in the wiring groove (24); the button control panel (3) includes a plurality of control buttons (31), the number of the control buttons (31) being not less than the number of the two-position two-way solenoid valve (221), and being used for regulating the on and off of the two-position two-way solenoid valve (221).

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