CN108709733B - Solenoid valve stroke and gas tightness detection device - Google Patents
Solenoid valve stroke and gas tightness detection device Download PDFInfo
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- CN108709733B CN108709733B CN201810882774.XA CN201810882774A CN108709733B CN 108709733 B CN108709733 B CN 108709733B CN 201810882774 A CN201810882774 A CN 201810882774A CN 108709733 B CN108709733 B CN 108709733B
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- 238000001514 detection method Methods 0.000 title claims abstract description 97
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 238000009434 installation Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000007689 inspection Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a solenoid valve travel and air tightness detection device, which comprises: the tool comprises a tool body, wherein an electromagnetic valve installation cavity is formed in the tool body, an electromagnetic valve installation opening, an air inlet, an air outlet, a stroke detection opening and an air pressure detection opening are formed in the electromagnetic valve installation cavity, the tool body is used for supporting and fixing a detected electromagnetic valve, the electromagnetic valve installation opening is used for installing the detected electromagnetic valve, the air inlet is used for inputting compressed air into the electromagnetic valve installation cavity, a valve capable of closing an air inlet channel is connected to the air inlet, the air outlet is used for abutting against an electromagnetic valve sealing gasket of the detected electromagnetic valve, a stroke detection switch is arranged on the stroke detection opening, and an air pressure sensor is arranged on the air pressure detection opening. According to the invention, the full detection of the stroke and the air tightness can be realized by only disassembling and assembling the electromagnetic valve once in one process, the production efficiency of the electromagnetic valve is greatly improved, and the automation of the whole detection process is facilitated.
Description
Technical Field
The invention relates to the technical field of valve detection, in particular to a solenoid valve stroke and air tightness detection device.
Background
At present, gas water heaters widely enter ordinary families, and along with the gradual improvement of the living standard of people, the requirements of people on household hot water are also higher and higher. At present, gas appliances such as constant temperature type gas water heaters, wall hanging furnaces and the like almost adopt a gas proportional valve and a sectional combustion mode. The sectional combustion needs to use electromagnetic valves as sectional valves and a stop valve of a main way, so that at least 2 electromagnetic valves are needed for one gas water heater.
The electromagnetic valve manufacturers are more and more, the quality control is also good and bad, and when the whole machine manufacturers such as the gas water heater, the wall hanging furnace and the like are in actual production, the load size is determined through secondary pressure, but due to the difference of the stroke of the electromagnetic valve on the gas valve, the same secondary pressure is adopted, but the gas flow is possibly different, and errors are brought to the load determination of the gas water heater, so that the full stroke detection has important significance in the production of the electromagnetic valve. In addition, if the air tightness of the electromagnetic valve is missed, explosion hidden danger possibly exists, and at present, a manufacturer adopts an independent air tightness detection procedure, and the electromagnetic valve is frequently disassembled and assembled so that the production cost is increased.
Disclosure of Invention
The invention aims to provide a device capable of realizing complete detection of stroke and air tightness by only assembling and disassembling an electromagnetic valve once in one process.
In order to achieve the above purpose, the invention adopts the following technical scheme.
An electromagnetic valve stroke and air tightness detection device is characterized by comprising: the tool comprises a tool body, wherein an electromagnetic valve installation cavity is formed in the tool body, an electromagnetic valve installation opening, an air inlet, an air outlet, a stroke detection opening and an air pressure detection opening are formed in the electromagnetic valve installation cavity, the tool body is used for supporting and fixing a detected electromagnetic valve, the electromagnetic valve installation opening is used for installing the detected electromagnetic valve, the air inlet is used for inputting compressed air into the electromagnetic valve installation cavity, a valve capable of closing an air inlet channel is connected to the air inlet, the air outlet is used for abutting against an electromagnetic valve sealing gasket of the detected electromagnetic valve to simulate the circulation state of air after the detected electromagnetic valve is opened, a stroke detection switch is arranged on the stroke detection opening, and an air pressure sensor is arranged on the air pressure detection opening.
As a further explanation of the scheme, the electromagnetic valve mounting port and the air outlet are respectively positioned at two ends of the electromagnetic valve mounting cavity, and the air outlet is movably mounted on the tool body through a guide rail and used for adjusting the distance between the air outlet and the electromagnetic valve mounting port.
As a further explanation of the above, the travel detection switch includes: the electromagnetic valve sealing gasket comprises an action contact, a reset spring, a travel switch body and a high-potential contact and a low-potential contact corresponding to the action contact, wherein the action contact is tightly sealed with the travel detection port under the action of the reset spring and protrudes into the electromagnetic valve mounting cavity, and when the electromagnetic valve sealing gasket moves to the position of the travel detection port, the action contact is extruded so as to be switched and connected between the high-potential contact and the low-potential contact.
As a further explanation of the above-mentioned scheme, a first sealing ring is provided on the solenoid valve mounting port, and the first sealing ring is used for sealing a mounting gap between the solenoid valve mounting port and the solenoid valve to be detected.
As a further explanation of the above-mentioned scheme, a second sealing ring is provided on the travel switch detection port, and the second sealing ring is used for sealing a gap between the action contact and the travel switch detection port.
As a further explanation of the above scheme, the valve, the detected electromagnetic valve, the travel detection switch and the gas pressure sensor are all connected with a control system, the control system is connected with an indication module and a power supply module, the indication module is used for indicating whether the travel and the air tightness are qualified, and the power supply module is used for supplying power to the valve, the detected electromagnetic valve and the control system.
As a further explanation of the above scheme, the control system is a PLC or a singlechip system module.
As a further explanation of the scheme, the indication module is an indication lamp display module, and comprises a red indication lamp and a green indication lamp which are respectively used for indicating whether the air tightness and the travel are qualified.
As a further explanation of the above scheme, the electromagnetic valve stroke and air tightness detection device includes the following detection steps:
1) And installing the detected electromagnetic valve on the electromagnetic valve installation cavity, and pressing and abutting the electromagnetic valve sealing gasket with the air outlet under the action of a spring of the detected electromagnetic valve, so that the air outlet is sealed.
2) And the air inlet is connected with a high-pressure gas pipeline.
3) The method comprises the steps of powering on, firstly detecting the air tightness, initializing the air pressure sensor, introducing compressed air into the electromagnetic valve installation cavity through the air inlet for maintaining pressure for T seconds, sampling a current air pressure value, then controlling the valve to be disconnected, stopping air supply, collecting the pressure value detected by the air pressure sensor at the moment, comparing the pressure value with the previous sampled air pressure value, and considering the air tightness detection of the electromagnetic valve to be qualified when the air pressure variation is smaller than a threshold value; otherwise, ending the detection, and failing the air tightness.
4) After the air tightness detection is qualified, the electromagnetic valve enters the stroke detection of the electromagnetic valve to be detected, the electromagnetic valve to be detected is electrified, the electromagnetic valve sealing gasket overcomes the tension of the spring and leaves the air outlet, and when the stroke detection switch detects that the electromagnetic valve sealing gasket reaches a specified position, the stroke detection of the electromagnetic valve to be detected is qualified.
As a further illustration of the above, the threshold is 15-30Pa.
The beneficial effects of the invention are as follows:
1. through set up solenoid valve installation cavity on the frock body to set up gas tightness detection mouth and stroke detection mouth on solenoid valve installation cavity, make only dismouting solenoid valve in a process can realize the full detection of stroke and gas tightness, also provide safer guarantee for the water heater complete machine simultaneously to improve solenoid valve production efficiency by a wide margin, and be convenient for realize the automation of whole testing process. Compared with the conventional caliper random inspection mode, the device realizes full inspection of the stroke, so that the consistency of the gas flow passing through the electromagnetic valve is ensured, and the stability of the load of the gas water heater under the same secondary pressure is further ensured.
2. Because the distance between the air outlet and the electromagnetic valve mounting port is adjustable, the detection of various electromagnetic valves with different types can be realized, and the universality is good.
Drawings
Fig. 1 is a block diagram showing a solenoid valve stroke and air tightness detection device.
Fig. 2 is a schematic diagram of a solenoid valve stroke and air tightness detection device.
Fig. 3 is a schematic diagram of a travel detection switch.
Fig. 4 shows a solenoid valve stroke and air tightness detection flow chart.
Reference numerals illustrate:
1: tool body, 2: solenoid valve installation cavity, 3: air inlet, 4: air outlet, 5: detected solenoid valve, 6: solenoid valve gasket, 7: travel detection switch, 8: gas pressure sensor, 9: guide rail, 10: first sealing ring, 11: second sealing ring, 12: control system, 13: indication module, 14: power supply module, 15: and (3) a spring.
7-1: action contact, 7-2: return spring, 7-3: travel switch body, 7-4: high potential contacts, 7-5: low potential contacts, 7-6: and a signal output terminal.
Detailed Description
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, a solenoid valve stroke and air tightness detecting device includes: the tool comprises a tool body 1, wherein an electromagnetic valve installation cavity 2 is arranged on the tool body 1, an electromagnetic valve installation opening, an air inlet 3, an air outlet 4, a stroke detection opening and an air pressure detection opening are arranged on the electromagnetic valve installation cavity 2, the tool body 1 is used for supporting and fixing a detected electromagnetic valve 5, the electromagnetic valve installation opening is used for installing the detected electromagnetic valve 5, the air inlet 3 is used for inputting compressed air into the electromagnetic valve installation cavity 2, a valve capable of closing the air inlet is connected to the air inlet 3, the air outlet 4 is used for abutting against an electromagnetic valve sealing gasket 6 of the detected electromagnetic valve 5, the circulation state of air after the detected electromagnetic valve 5 is opened is simulated, a stroke detection switch 7 is arranged on the stroke detection opening, and an air pressure sensor 8 is arranged on the air pressure detection opening.
The electromagnetic valve mounting port and the air outlet 4 are respectively positioned at two ends of the electromagnetic valve mounting cavity 2, the air outlet 4 is movably mounted on the tool body 1 through a guide rail 9 and used for adjusting the distance between the air outlet 4 and the electromagnetic valve mounting port, and therefore the stroke delta and the valve mounting depth L of different electromagnetic valves are adjusted, and detection of various electromagnetic valves of different types is achieved. Since the solenoid valve gasket thickness h is generally fixed, the installation distance x=δ+h of the travel detection switch 7 is adjusted before production.
The travel detection switch 7 includes: the electromagnetic valve comprises an action contact 7-1, a reset spring 7-2, a travel switch body 7-3, and a high potential contact 7-4 and a low potential contact 7-5 corresponding to the action contact 7-1, wherein the action contact 7-1 is tightly pressed and sealed with a travel detection port under the action of the reset spring 7-2 and protrudes into the electromagnetic valve mounting cavity 2, when the electromagnetic valve sealing gasket 6 moves to the position of the travel detection port, the action contact 7-1 is extruded so as to enable the action contact 7-1 to be switched and connected between the high potential contact 7-4 and the low potential contact 7-5, thereby generating high-low level change output, and judging whether the travel of the detected electromagnetic valve is qualified or not according to the high-low level change. The travel switch body 7-3 mainly serves as a supporting and packaging member. The signal output end 7-6 of the travel detection switch 7 is connected with the action contact 7-1 and is a sheet pin.
Preferably, the compressed gas is compressed air. The electromagnetic valve mounting opening is provided with a first sealing ring 10, and the first sealing ring 10 is used for sealing a mounting gap between the electromagnetic valve mounting opening and the electromagnetic valve 5 to be detected. The second sealing ring 11 is arranged on the travel switch detection port, and the second sealing ring 11 is used for sealing a gap between the action contact 7-1 and the travel switch detection port.
Further preferably, the valve, the detected electromagnetic valve 5, the travel detection switch 7 and the gas pressure sensor 8 are all connected with a control system 12; the control system 12 is a PLC or a singlechip system module; an indicating module 13 and a power module 14 are connected to the control system 12, wherein the indicating module 13 is an indicating lamp display module, and comprises a red indicating lamp and a green indicating lamp for indicating whether the travel and the air tightness are qualified; the power module 14 is a DC24V power module for powering the valve, the solenoid valve 5 to be tested and the control system 12.
In actual operation, as shown in fig. 4, the method comprises the following steps: 1) The electromagnetic valve 5 to be detected is arranged on the electromagnetic valve installation cavity 2, and the electromagnetic valve sealing gasket 6 is pressed against the air outlet 4 under the action of the spring 15 carried by the electromagnetic valve 5 to be detected, so that the air outlet 4 is sealed. 2) A high-pressure gas pipe is connected to the gas inlet 3. 3) The method comprises the steps of powering on, firstly detecting the air tightness, initializing a gas pressure sensor 8, introducing compressed gas into an electromagnetic valve installation cavity 2 for maintaining pressure for T seconds, sampling a current air pressure value, then controlling a cylinder valve to be disconnected, stopping air supply, detecting the pressure value of the air pressure sensor at the moment, comparing the pressure value with the previous sampled air pressure value, and considering the air tightness detection of the electromagnetic valve to be qualified when the air pressure variation delta P is less than 25 Pa; otherwise, ending the detection, and turning on the red indicator lamp while the air tightness is unqualified. 4) After the air tightness detection is qualified, the air tightness enters the stroke detection of the detected electromagnetic valve, the detected electromagnetic valve is electrified, the electromagnetic valve sealing gasket 6 overcomes the tension of the spring 15 and leaves the air outlet 4, meanwhile, the action contact 7-1 is separated from the high potential contact 7-4 and is contacted with the low potential contact 7-5, the stroke detection switch 7 outputs low potential to the control system 12, the stroke detection of the detected electromagnetic valve is qualified, and meanwhile, the green indicator lamp is lightened. When the detection is unqualified in any link, the detection is automatically stopped, and unqualified products are directly incorporated.
The electromagnetic valve stroke and air tightness detection device provided by the embodiment can realize full detection of stroke and air tightness by only disassembling and assembling the electromagnetic valve to be detected once in one procedure, automatically completes the whole detection process, greatly improves the production efficiency of the electromagnetic valve and simultaneously provides safer guarantee for the whole water heater. Compared with the conventional caliper random inspection mode, the full-inspection of the stroke is realized by the detection device, so that the consistency of the gas flow of the electromagnetic valve is ensured, and the stability of the load of the water heater under the same secondary pressure is further ensured.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (7)
1. An electromagnetic valve stroke and air tightness detection device is characterized by comprising: the tool comprises a tool body, wherein the tool body is provided with an electromagnetic valve mounting cavity, the electromagnetic valve mounting cavity is provided with an electromagnetic valve mounting port, an air inlet, an air outlet, a stroke detection port and an air pressure detection port, the tool body is used for supporting and fixing a detected electromagnetic valve, the electromagnetic valve mounting port is used for mounting the detected electromagnetic valve, the air inlet is used for inputting compressed air into the electromagnetic valve mounting cavity, the air inlet is connected with a valve capable of closing an air inlet channel, the air outlet is used for abutting against an electromagnetic valve sealing gasket of the detected electromagnetic valve, the circulation state of air after the detected electromagnetic valve is opened is simulated, the stroke detection port is provided with a stroke detection switch, and the air pressure detection port is provided with an air pressure sensor;
the electromagnetic valve mounting port and the air outlet are respectively positioned at two ends of the electromagnetic valve mounting cavity, and the air outlet is movably mounted on the tool body through a guide rail and used for adjusting the distance between the air outlet and the electromagnetic valve mounting port;
the valve, the detected electromagnetic valve, the travel detection switch and the gas pressure sensor are all connected with a control system, an indication module and a power supply module are connected to the control system, the indication module is used for indicating whether travel and air tightness are qualified or not, and the power supply module is used for supplying power to the valve, the detected electromagnetic valve and the control system;
the electromagnetic valve stroke and air tightness detection device comprises the following detection steps:
1) The detected electromagnetic valve is mounted on the electromagnetic valve mounting cavity, and the electromagnetic valve sealing gasket is pressed against the air outlet under the action of a spring of the detected electromagnetic valve, so that the air outlet is sealed;
2) A high-pressure gas pipeline is connected to the gas inlet;
3) The method comprises the steps of powering on, firstly detecting the air tightness, initializing the air pressure sensor, introducing compressed air into the electromagnetic valve installation cavity through the air inlet for maintaining pressure for T seconds, sampling a current air pressure value, then controlling the valve to be disconnected, stopping air supply, collecting the pressure value detected by the air pressure sensor at the moment, comparing the pressure value with the previous sampled air pressure value, and considering the air tightness detection of the electromagnetic valve to be qualified when the air pressure variation is smaller than a threshold value; otherwise, ending the detection, and failing the air tightness;
4) After the air tightness detection is qualified, the electromagnetic valve enters the stroke detection of the electromagnetic valve to be detected, the electromagnetic valve to be detected is electrified, the electromagnetic valve sealing gasket overcomes the tension of the spring and leaves the air outlet, and when the stroke detection switch detects that the electromagnetic valve sealing gasket reaches a specified position, the stroke detection of the electromagnetic valve to be detected is qualified.
2. The electromagnetic valve stroke and air tightness detection device as recited in claim 1 wherein said stroke detection switch comprises: the electromagnetic valve sealing gasket comprises an action contact, a reset spring, a travel switch body and a high-potential contact and a low-potential contact corresponding to the action contact, wherein the action contact is tightly sealed with the travel detection port under the action of the reset spring and protrudes into the electromagnetic valve mounting cavity, and when the electromagnetic valve sealing gasket moves to the position of the travel detection port, the action contact is extruded so as to be switched and connected between the high-potential contact and the low-potential contact.
3. The electromagnetic valve stroke and air tightness detection device according to claim 1, wherein a first sealing ring is arranged on the electromagnetic valve mounting port, and the first sealing ring is used for sealing a mounting gap between the electromagnetic valve mounting port and the electromagnetic valve to be detected.
4. The electromagnetic valve stroke and air tightness detection device according to claim 2, wherein a second sealing ring is arranged on the stroke detection port, and the second sealing ring is used for sealing a gap between the action contact and the stroke detection port.
5. The electromagnetic valve stroke and air tightness detection device according to claim 1, wherein the control system is a PLC or a single chip microcomputer system module.
6. The electromagnetic valve stroke and air tightness detection device according to claim 1, wherein the indication module is an indication lamp display module, and comprises a red indication lamp and a green indication lamp which are respectively used for indicating whether the air tightness and the stroke are qualified; and when the air tightness is unqualified, the red indicator lamp is lightened, and when the stroke detection is qualified, the green indicator lamp is lightened.
7. The electromagnetic valve stroke and air tightness detection device according to claim 1, wherein the threshold value is 15-30Pa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810882774.XA CN108709733B (en) | 2018-08-06 | 2018-08-06 | Solenoid valve stroke and gas tightness detection device |
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| CN201810882774.XA CN108709733B (en) | 2018-08-06 | 2018-08-06 | Solenoid valve stroke and gas tightness detection device |
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| CN108709733A CN108709733A (en) | 2018-10-26 |
| CN108709733B true CN108709733B (en) | 2024-04-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109374290A (en) * | 2018-12-28 | 2019-02-22 | 合肥美亚光电技术股份有限公司 | Spray the detection device of valve |
| CN111537164B (en) * | 2020-05-20 | 2021-10-01 | 三门核电有限公司 | C-shaped ball valve on-line stroke adjusting and pressing test system and method |
| CN112857643B (en) * | 2020-12-31 | 2022-12-13 | 大连融科储能装备有限公司 | Flow battery pretightening force monitoring device |
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