CN112213035A - Air tightness detection system, detection method and special clamp - Google Patents
Air tightness detection system, detection method and special clamp Download PDFInfo
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- CN112213035A CN112213035A CN202010929731.XA CN202010929731A CN112213035A CN 112213035 A CN112213035 A CN 112213035A CN 202010929731 A CN202010929731 A CN 202010929731A CN 112213035 A CN112213035 A CN 112213035A
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- 238000001514 detection method Methods 0.000 title claims abstract description 98
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002737 fuel gas Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an air tightness detection system, a detection method and a special fixture, wherein the detection system is used for detecting the air tightness of a valve body and comprises the following steps: the detection device comprises a detection device, a control module and an execution module, wherein the control module drives the execution module to plug a nozzle of the valve body to be detected, and the detection device detects the air tightness of the plugged nozzle of the valve body to be detected. When the electromagnetic pneumatic switching valve is implemented, firstly, a valve body to be detected is arranged on a station corresponding to a special clamp of the valve body to be detected, then, a start button is pressed down, and a control module controls the electromagnetic pneumatic switching valve to control a plugging cylinder to plug a nozzle of the valve body to be detected on the one hand, and on the other hand, the control module can simultaneously supply power to the valve body to be detected for detection, if the detection is qualified, the plugging cylinder releases the valve body to be detected, and if the detection is unqualified, an alarm device gives an alarm. The invention can realize automatic detection program, and has simple operation and high detection efficiency.
Description
Technical Field
The invention relates to the technical field of automatic detection of valve bodies, in particular to an air tightness detection system, an air tightness detection method and a special clamp.
Background
The air tightness is a technical index closely related to the product quality, and has recently received attention from many industries, particularly as an important part of enterprises for detecting leakage measures in the manufacturing process. The air tightness detection plays an increasingly important role in ensuring the product quality, and is particularly applied to valve bodies of gas equipment such as gas stoves and the like. If the gas tightness is not qualified, the gas leakage may be caused, which may cause resource waste or cause disastrous safety accidents such as fire hazard.
The sectional valve assembly is an important part for the fuel gas to enter the combustor after passing through the proportional valve, and is a key device for keeping the temperature constant in the sectional combustion of the fuel gas. According to the difference of the segmentation scheme, the 6-row-fire 16L gas water heater is generally segmented in a 2-4-6 mode. (the former old model is segmented according to a 1-3-6 mode) the manufacturing process of the segmented valve body is provided with more blank caps and compartments, and the nozzles are arranged on the segmented valve body, because the inside is communicated with gas, the airtightness needs to be detected, and the airtightness needs to be detected at each segmented position.
In the conventional section valve air tightness detection, three nozzles are used for blocking cylinders QG1, QG2 and QG3, and six nozzle holes B of a section valve assembly a are respectively blocked: two normally open nozzles B2 in the middle are plugged by an air cylinder QG1, the other two electromagnetic valve-controlled nozzles B1 and B3 are plugged by an air cylinder QG2 and a QG3 respectively, a leak detector is connected at an air inlet plugging air cylinder QG4, 5KPa compressed air is introduced for pressure maintaining for 5 seconds, if the leakage value is less than or equal to 0.6ml/min, the air tightness is detected to be qualified, in the process, the air inlet plugging air cylinder QG1 and the first nozzle plugging air cylinder QC1 synchronously act, and in the test process, plugging is carried out in the whole process. In this test, as shown in fig. 1, the normally open nozzle B2 is tested a first time, as shown in fig. 2, the first solenoid valve is opened a second time, as shown in fig. 3, the second solenoid valve is opened a third time, and the airtightness is tested three times in total. The manual gas change-over valve is moved manually and the shutoff cylinder is opened and closed, and the solenoid valve is opened and closed to manual connection solenoid valve connecting wire, and whole process operation action is many, and is long, and detection efficiency is low, and is with high costs.
The air tightness index is an A-type index of a gas channel, the gas channel can be produced only by being qualified through full inspection, and due to the limitation of the traditional design and manufacturing technology, the detection device can be operated repeatedly only at the low level, and has serious lag with the development of the overall level of a gas water heater product, and the detection device must be greatly improved and enhanced.
Disclosure of Invention
The invention provides an air tightness detection system, an air tightness detection method and a special clamp, which can overcome the defects, automatically detect the air tightness of a valve body to be detected and greatly improve the production efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
an airtightness detection system for detecting airtightness of a valve body, comprising: the control module drives the execution module to plug the nozzle of the valve body to be detected and controls the detection device to detect the air tightness of the plugged nozzle of the valve body to be detected.
The execution module comprises an electromagnetic pneumatic switching valve and a plugging cylinder, wherein the electromagnetic pneumatic switching valve receives the instruction of the control module and controls the plugging cylinder to plug the nozzle of the valve body to be detected.
Preferably, the electromagnetic pneumatic switching valves are at least two, namely a first electromagnetic pneumatic switching valve and a second electromagnetic pneumatic switching valve; the number of the plugging cylinders is at least three, namely a first plugging cylinder, a second plugging cylinder and a third plugging cylinder; the first electromagnetic pneumatic switching valve is used for controlling the first plugging cylinder and the third plugging cylinder; and the second electromagnetic pneumatic switching valve is used for controlling the second plugging air cylinder.
Furthermore, the electromagnetic pneumatic switching valve also comprises a third electromagnetic pneumatic switching valve; the plugging cylinder also comprises a fourth plugging cylinder; and the third electromagnetic pneumatic switching valve is used for controlling the fourth plugging cylinder.
The first plugging cylinder and the third plugging cylinder are respectively used for plugging a normally open nozzle and an air inlet of the valve body to be detected; the second plugging cylinder and the fourth plugging cylinder are used for plugging the other four nozzles of the valve body to be detected.
The control module is also used for supplying power to the electromagnetic valve of the valve body to be detected and opening the electromagnetic valve.
Preferably, the number of the valve bodies to be detected is two, and the control module controls the two sets of execution modules and the detection device to perform air tightness detection on each valve body to be detected.
Preferably, the air tightness detection system further comprises an alarm device for reminding the detection result.
A detection method using the air tightness detection system comprises the following steps:
s1: the control module receives a starting instruction and sends a plugging instruction to the execution module;
s2: the execution module plugs a nozzle of the valve body to be detected;
s3: the detection device detects the air tightness of the blocked nozzle;
s4: and after the detection is qualified, the execution module loosens the valve body to be detected.
The airtightness detection method comprises the following steps:
after the detection device detects the first group of blocked nozzles, if the first group of blocked nozzles are qualified, the control module controls the second electromagnetic pneumatic switching valve to drive the second blocking cylinder to block the second group of two nozzles of the valve body to be detected; step S3 is executed again.
The airtightness detection method comprises the following steps:
after the detection device detects the two nozzles of the second group of plugs, if the nozzles of the second group of plugs are qualified, the control module controls the third electromagnetic pneumatic switching valve to drive the fourth plugging cylinder to plug the two nozzles of the third group of the valve body to be detected; step S3 is executed again.
The clamp special for the air tightness detection system comprises a supporting component and a positioning component, wherein a valve body to be detected is arranged on the positioning component, and an execution module is arranged on the supporting component.
The supporting component comprises a bottom plate, a left upright post, a right upright post and an upper plate, and the valve body to be detected is arranged on the bottom plate through the positioning component; the execution module is installed on the upper plate.
The clamp of the air tightness detection system further comprises a sealing rubber pad, and the sealing rubber pad is arranged between the nozzle of the valve body to be detected and the execution module.
After the technical scheme is implemented, when the valve body to be detected is installed on a station corresponding to a special fixture of the valve body to be detected, then a start button is pressed down, the control module controls the electromagnetic pneumatic switching valve to control the plugging cylinder to plug a nozzle of the valve body to be detected, on the other hand, the control module can simultaneously supply power to the valve body to be detected for detection, if the detection is qualified, the plugging cylinder releases the valve body to be detected, and if the detection is not qualified, the alarm device gives an alarm. The invention can realize automatic detection program, and has simple operation and high detection efficiency.
Drawings
FIG. 1 is a schematic diagram of a first conventional detection;
FIG. 2 is a schematic diagram of a second conventional detection;
FIG. 3 is a schematic diagram of a third conventional detection;
FIG. 4 is a control diagram of the automatic detection of the present invention;
FIG. 5 is a diagram of a fixture configuration for implementing the automatic test of the present invention;
fig. 6 is a cross-sectional view of the clip taken along line a-a.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 4, the present invention discloses an air tightness detecting system for detecting air tightness of a valve body, comprising: a detection device, a control module, an execution module and an alarm device, in particular,
valve body 1 to be tested, comprising six nozzle holes: two nozzles 12 which are normally open in the middle, and two other nozzles 11 and 13 which are controlled by solenoid valves.
In this embodiment, it is equipped with two stations, and two wait to detect the valve body and can detect simultaneously totally.
In the present embodiment, the execution module includes three electromagnetic pneumatic switching valves and four plugging cylinders, respectively, a first electromagnetic pneumatic switching valve YV1, a second electromagnetic pneumatic switching valve YV2, and a second electromagnetic pneumatic switching valve YV 3; the four plugging cylinders comprise a first plugging cylinder QG1, a second plugging cylinder QG2, a third plugging cylinder QG3 and a fourth plugging cylinder QG 4;
the first electromagnetic pneumatic switching valve YV1 is used for controlling a first blocking cylinder QG1 and a third blocking cylinder QG3 to block two normally open nozzles 12 and an air inlet 14 in the middle of the valve body 1 to be detected;
the second electromagnetic pneumatic switching valve YV2 is used for controlling the second plugging cylinder QG2 to plug the other two nozzles 11 of the valve body 1 to be detected;
the third electromagnetic pneumatic switching valve YV3 is used for controlling the fourth plugging cylinder QG4 to plug the other two nozzles 13 of the valve body 1 to be detected;
the detection means, which in this embodiment is a leak detector 3.
The alarm device 4 includes a green indicator 41 and a red indicator 42. If the detection is passed, the green indicator lamp 41 is turned on, and if the detection is not passed, the red indicator lamp 42 is turned on. In practical implementation, the alarm device 4 may further include an audio alarm.
The control module, in this embodiment, it is PLC program control cabinet 2, and it still is equipped with start button 21 and end button 22, and when using, it receives the instruction of start button 21, on the one hand, can control the pneumatic diverter valve of electromagnetism, makes it control shutoff cylinder carry out the shutoff operation to the nozzle, and on the other hand, it can also supply power and open the solenoid valve to the solenoid valve of waiting to detect the valve body, can also cut off the power supply or the circular telegram to the solenoid valve as required. The signal of the leak detector 3 is connected with the control signal of the PLC.
When the air tightness detection device is used, the button 21 is started according to the first station, and the PLC program control cabinet 2 can automatically finish three times of air tightness detection according to the sequence, namely, the air tightness detection device firstly controls the first electromagnetic pneumatic switching valve YV1 to control the first blocking cylinder QG1 and the third blocking cylinder QG3, so that the first blocking cylinder QG1 and the third blocking cylinder QG3 block two nozzles 12 and an air inlet 14 which are normally opened in the middle of the valve body 1 to be detected; after plugging, the leak detector 3 starts to perform airtightness detection on the two nozzles 12. After the detection is passed, the PLC program control cabinet 2 controls the second electromagnetic pneumatic switching valve YV2 again to control the second plugging cylinder QG2 and enable the second plugging cylinder QG2 to plug the other two nozzles 11 of the valve body 1 to be detected; after plugging, the leak detector 3 starts to perform airtightness detection on the two nozzles 11. After the detection is passed, the PLC program control cabinet 2 controls the third electromagnetic pneumatic switching valve YV3 again to control the fourth plugging cylinder QG4 and enable the fourth plugging cylinder QG4 to plug the other two nozzles 13 of the valve body 1 to be detected; after the detection is passed, the green light indicator lamp 41 is turned on. Loosening the clamp and taking out the workpiece; and pressing a second station starting key while automatically detecting by the system, and completing the same detection. If the workpiece has air leakage and the system automatically judges that the workpiece is unqualified, the red indicator lamp is turned on 42 to give an alarm, and manual intervention is needed. The system only needs to manually indicate to start detection at the beginning, and the whole detection process realizes full-process automatic operation, so that the detection efficiency is greatly improved; and can detect two valve bodies simultaneously.
Example 2
The invention also discloses a detection method applying the air tightness detection system, which comprises the following steps:
s1: the control module receives the starting instruction and sends a blocking instruction to the execution module;
in this embodiment, the control module is a PLC program control cabinet 2; and the execution module comprises three electromagnetic pneumatic switching valves and four plugging cylinders, and is specifically the same as the first embodiment.
The PLC program control cabinet 2 sends a plugging instruction to the first electromagnetic pneumatic switching valve YV 1;
s2: the execution module plugs a nozzle of the valve body to be detected;
the first electromagnetic pneumatic switching valve YV1 controls the first blocking cylinder QG1 and the third blocking cylinder QG3, so that the first blocking cylinder QG1 and the third blocking cylinder QG3 block two normally-opened nozzles 12 and an air inlet 14 in the middle of the valve body 1 to be detected;
s3: the detection device detects the air tightness of the blocked nozzle;
the detection means, which in this embodiment is a leak detector 3. Which checks the airtightness of the two nozzles 12 and the air inlet 14.
S4: after the nozzle 12 is detected to be qualified, the PLC program control cabinet controls the second electromagnetic pneumatic switching valve to drive the second plugging cylinder QG2 to plug the two nozzles 11 of the valve body to be detected; then, detecting the air tightness of the two nozzles 11 by using a leakage detector;
after the detection is passed, the PLC program control cabinet 2 controls the third electromagnetic pneumatic switching valve YV3 again to control the fourth plugging cylinder QG4 and enable the fourth plugging cylinder QG4 to plug the other two nozzles 13 of the valve body 1 to be detected; after the detection is passed, the green light indicator lamp 41 is turned on. Loosening the clamp and taking out the workpiece; and pressing a second station starting key while automatically detecting by the system, and completing the same detection.
The detection method is a full-automatic process, and compared with manual detection in the prior art, the detection method is high in efficiency.
Example 3
Referring to fig. 5 and 6, the present invention further discloses a clamp dedicated for the air tightness detection system, which includes a supporting assembly 5, a positioning assembly 6 and a sealing rubber pad 7, and the following components are specifically provided:
the support assembly 5 includes a base plate 51, left and right uprights 52, 53, and an upper plate 54.
The valve body 1 to be detected is mounted on the bottom plate 51 through the positioning assembly 6.
In the present embodiment, the positioning assembly 6 is a set of positioning blocks.
The plugging cylinders QG1, QG2 and QG4 are arranged on the upper plate 54, and a sealing rubber gasket 7 is arranged between the plugging cylinders QG1, QG2 and QG4 and the nozzle of the valve body to be detected.
The valve body to be detected is arranged on the positioning component, and the execution module is arranged on the supporting component.
In this embodiment, two sets of tooling fixtures for manufacturing the segmented valve body can be used as tooling for the first station and the second station respectively. The valve body 1 is mounted on a jig by a positioning assembly, and then a detection process is started.
In the detection process, the PLC program control cabinet 2 can control the connection and the disconnection of the electromagnetic valve plug power supply on the segmented valve body to control the opening and the closing of the nozzle; and if the air leakage is unqualified, the red light is turned on to alarm, and manual intervention is needed. One person can alternately and simultaneously operate the two stations, so that the production efficiency is further improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. An air tightness detection system for detecting air tightness of a valve body, comprising: the control module drives the execution module to plug the nozzle of the valve body to be detected and controls the detection device to detect the air tightness of the plugged nozzle of the valve body to be detected.
2. The airtightness detection system according to claim 1, wherein: the execution module comprises an electromagnetic pneumatic switching valve and a plugging cylinder, wherein the electromagnetic pneumatic switching valve receives the instruction of the control module and controls the plugging cylinder to plug the nozzle of the valve body to be detected.
3. The airtightness detection system according to claim 2, wherein: the electromagnetic pneumatic switching valves are at least two, namely a first electromagnetic pneumatic switching valve and a second electromagnetic pneumatic switching valve; the number of the plugging cylinders is at least three, namely a first plugging cylinder, a second plugging cylinder and a third plugging cylinder; the first electromagnetic pneumatic switching valve is used for controlling the first plugging cylinder and the third plugging cylinder; and the second electromagnetic pneumatic switching valve is used for controlling the second plugging air cylinder.
4. A gas tightness detection system according to claim 3, wherein: the electromagnetic pneumatic switching valve also comprises a third electromagnetic pneumatic switching valve; the plugging cylinder also comprises a fourth plugging cylinder; and the third electromagnetic pneumatic switching valve is used for controlling the fourth plugging cylinder.
5. The airtightness detection system according to claim 4, wherein: the first plugging cylinder and the third plugging cylinder are respectively used for plugging a normally open nozzle and an air inlet of the valve body to be detected; the second plugging cylinder and the fourth plugging cylinder are used for plugging the other four nozzles of the valve body to be detected.
6. The airtightness detection system according to any one of claims 1 to 5, wherein: the control module is also used for supplying power to the electromagnetic valve of the valve body to be detected and opening the electromagnetic valve.
7. The airtightness detection system according to claim 6, wherein: the control module controls the two executing modules and the detection device to carry out air tightness detection on each valve body to be detected.
8. The airtightness detection system according to claim 1, wherein: the device also further comprises an alarm device for reminding the detection result.
9. A method of testing using the airtightness testing system according to any one of claims 1 to 8, comprising:
s1: the control module receives a starting instruction and sends a plugging instruction to the execution module;
s2: the execution module plugs a nozzle of the valve body to be detected;
s3: the detection device detects the air tightness of the blocked nozzle;
s4: and after the detection is qualified, the execution module loosens the valve body to be detected.
10. The airtightness detection method according to claim 9, wherein: the method comprises the following steps:
after the detection device detects the first group of blocked nozzles, if the first group of blocked nozzles are qualified, the control module controls the second electromagnetic pneumatic switching valve to drive the second blocking cylinder to block the second group of two nozzles of the valve body to be detected; step S3 is executed again.
11. The airtightness detection method according to claim 10, wherein: the method comprises the following steps:
after the detection device detects the two nozzles of the second group of plugs, if the nozzles of the second group of plugs are qualified, the control module controls the third electromagnetic pneumatic switching valve to drive the fourth plugging cylinder to plug the two nozzles of the third group of the valve body to be detected; step S3 is executed again.
12. A jig dedicated to a tightness detection system according to any one of claims 1 to 8, characterized in that: the valve body to be detected is arranged on the positioning component, and the execution module is arranged on the supporting component.
13. The fixture of a hermeticity detection system according to claim 12, wherein: the supporting component comprises a bottom plate, a left upright post, a right upright post and an upper plate, and the valve body to be detected is arranged on the bottom plate through the positioning component; the execution module is installed on the upper plate.
14. The fixture of a hermeticity inspection system according to claim 13, wherein: the valve body detection device further comprises a sealing rubber mat, wherein the sealing rubber mat is arranged between the nozzle of the valve body to be detected and the execution module.
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| CN202010929731.XA CN112213035B (en) | 2020-09-07 | 2020-09-07 | Air tightness detection system, detection method and special fixture |
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| CN208588506U (en) * | 2018-05-23 | 2019-03-08 | 无锡威孚高科技集团股份有限公司 | A kind of sealed nozzle detection device |
| CN108760188A (en) * | 2018-07-17 | 2018-11-06 | 广东万家乐燃气具有限公司 | A kind of automatic detection device and system |
| CN208621260U (en) * | 2018-07-19 | 2019-03-19 | 无锡力华智能科技有限公司 | A kind of detection system of quick inspection valve group air-tightness |
| CN208607004U (en) * | 2018-08-06 | 2019-03-15 | 广东万家乐燃气具有限公司 | A kind of solenoid travel and air-tightness detection device |
| CN209892828U (en) * | 2019-04-02 | 2020-01-03 | 广东长青（集团）股份有限公司 | Gas sectional valve |
| CN210243107U (en) * | 2019-04-30 | 2020-04-03 | 华帝股份有限公司 | Nozzle anti-blocking detection device |
| CN210978669U (en) * | 2019-06-12 | 2020-07-10 | 华帝股份有限公司 | Sectional valve assembly and have its combustor and gas heater |
| CN210566421U (en) * | 2019-09-12 | 2020-05-19 | 珠海格力电器股份有限公司 | Gas segmentation valve, gas controlling means and gas hanging stove |
| CN210487172U (en) * | 2019-10-15 | 2020-05-08 | 苏州协同创新智能制造装备有限公司 | Valve body gas tightness detection device |
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