CN112213035B - Air tightness detection system, detection method and special fixture - Google Patents
Air tightness detection system, detection method and special fixture Download PDFInfo
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- CN112213035B CN112213035B CN202010929731.XA CN202010929731A CN112213035B CN 112213035 B CN112213035 B CN 112213035B CN 202010929731 A CN202010929731 A CN 202010929731A CN 112213035 B CN112213035 B CN 112213035B
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- 238000001514 detection method Methods 0.000 title claims abstract description 85
- 230000000903 blocking effect Effects 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007689 inspection Methods 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
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- 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
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- 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 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 a 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 invention is implemented, firstly, the valve body to be detected is arranged on a station corresponding to the special clamp, then, the starting button is pressed, and the control module controls the electromagnetic pneumatic switching valve to control the blocking cylinder to block the nozzle of the valve body to be detected, and on the other hand, the control module can simultaneously perform power supply detection on the valve body to be detected, the blocking cylinder releases the valve body to be detected if the detection is qualified, and the alarm device alarms if the detection is unqualified. The invention can realize an automatic detection program, and has simple and convenient 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 fixture.
Background
Air tightness, which is a technical index closely related to product quality, has recently received attention from a number of industries, and is particularly emphasized by enterprises for detecting leakage means in manufacturing processes. The air tightness detection plays an increasingly important role in ensuring the quality of products, and is particularly applied to valve bodies of gas equipment such as gas cookers and the like. If the air tightness is not qualified, the leakage of the fuel gas and the gas can be caused, so that the resource waste is caused, or the disaster safety accidents such as fire disaster and the like are caused.
The sectional valve assembly is an important part for enabling the fuel gas to enter the burner after passing through the proportional valve, and is a key device for keeping the temperature constant during the sectional combustion of the fuel gas. According to different segmentation schemes, for a 6-fire 16L gas water heater, the gas water heater is generally segmented in a 2-4-6 mode. (the former model has the steps of segmenting according to the mode of 1-3-6), the manufacturing process of the segmented valve body is provided with more chokes and compartments, and the nozzle is arranged on the segmented valve body, so that the gas tightness is required to be detected because the gas is introduced into the segmented valve body, and each segmented position is required to be detected.
The traditional air tightness detection of the sectional valve is to plug the cylinders QG1, QG2 and QG3 by three nozzles to respectively plug six nozzle holes B of the sectional valve assembly A: the two nozzles B2 which are normally open in the middle are blocked by one air cylinder QG1, the other two air cylinders QG2 and QG3 controlled by the other two electromagnetic valves are respectively blocked by one air cylinder QG2 and QG3, then a leak detector is connected to the air inlet blocking air cylinder QG4, compressed air of 5KPa is introduced to maintain the pressure 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 blocking air cylinder QG1 and the first nozzle blocking air cylinder QC1 synchronously act, and in the test process, the whole process is blocked. In this detection process, as shown in fig. 1, the normally open nozzle B2 is detected for the first time, as shown in fig. 2, the first solenoid valve is opened and detected for the second time, as shown in fig. 3, and the second solenoid valve is opened and detected for the third time, for a total of three times of airtightness. The manual gas switching valve is manually moved to open and close the blocking cylinder, the electromagnetic valve is manually connected with the electromagnetic valve connecting line to open and close the electromagnetic valve, the whole process has multiple operation actions, long time, low detection efficiency and high cost.
The air tightness index is an A-type index of the gas channel, and the gas channel can be produced only after being fully inspected, and the detection device can only be operated repeatedly at the low level due to the restriction of the traditional design and manufacturing technology, so that the gas tightness index is seriously lagged from the development of the whole level of the gas water heater product, and the gas water heater product needs to be greatly improved and improved.
Disclosure of Invention
The invention provides an air tightness detection system, a detection method and a special fixture, 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 above purpose, the invention adopts the following technical scheme:
an air tightness detection system for detecting air tightness of a valve body, comprising: the 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 a 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 blocking cylinder, wherein the electromagnetic pneumatic switching valve receives the control module command and controls the blocking cylinder to block the nozzle of the valve body to be detected.
Preferably, at least two electromagnetic pneumatic switching valves are provided, which are a first electromagnetic pneumatic switching valve and a second electromagnetic pneumatic switching valve respectively; at least three plugging cylinders are arranged in a matched manner, and are a first plugging cylinder, a second plugging cylinder and a third plugging cylinder respectively; the first electromagnetic pneumatic switching valve is used for controlling the first blocking cylinder and the third blocking cylinder; the second electromagnetic pneumatic switching valve is used for controlling the second blocking cylinder.
Further, the electromagnetic pneumatic switching valve further comprises a third electromagnetic pneumatic switching valve; the plugging cylinder also comprises a fourth plugging cylinder; the third electromagnetic pneumatic switching valve is used for controlling the fourth plugging cylinder.
The first blocking cylinder and the third blocking cylinder are respectively used for blocking the normally open nozzle and the air inlet of the valve body to be detected; the second blocking cylinder and the fourth blocking cylinder are used for blocking 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, two valve bodies to be detected are provided, and the control module controls the two execution modules and the detection device to detect the air tightness of 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 is used for plugging 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 air tightness detection method comprises the following steps:
after the detection device finishes detecting 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 two nozzles of the second group of the valve body to be detected; step S3 is executed again.
The air tightness detection method comprises the following steps:
after the detection device finishes detecting the two blocked nozzles of the second group, if the two blocked nozzles are qualified, the control module controls the third electromagnetic pneumatic switching valve to drive the fourth blocking cylinder to block the two blocked nozzles of the third group of the valve body to be detected; step S3 is executed again.
The fixture 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 the executing module is arranged on the supporting component.
The supporting component comprises a bottom plate, left and right stand columns 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 arranged on the upper plate.
The clamp of the air tightness detection system further comprises a sealing rubber cushion, wherein the sealing rubber cushion is arranged between the nozzle of the valve body to be detected and the execution module.
After the technical scheme is implemented, when the electromagnetic pneumatic switching valve is implemented, firstly, the valve body to be detected is arranged on a station corresponding to the special clamp, then, the starting button is pressed, and the control module controls the electromagnetic pneumatic switching valve to control the blocking cylinder to block the nozzle of the valve body to be detected, and on the other hand, the control module can simultaneously perform power supply detection on the valve body to be detected, the blocking cylinder loosens the valve body to be detected if the detection is qualified, and the alarm device alarms if the detection is unqualified. The invention can realize an automatic detection program, and has simple and convenient operation and high detection efficiency.
Drawings
FIG. 1 is a schematic diagram of a prior art first detection;
FIG. 2 is a schematic diagram of a second detection in the prior art;
FIG. 3 is a schematic diagram of a third conventional test;
FIG. 4 is a diagram of an automated inspection control of the present invention;
FIG. 5 is a block diagram of a fixture embodying the automatic inspection of the present invention;
fig. 6 is a cross-sectional view of the clip taken along line A-A.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 4, the present invention discloses an air tightness detection system for detecting air tightness of a valve body, comprising: the detection device, the control module, the execution module and the alarm device, in particular,
the valve body 1 to be detected comprises six nozzle holes: two nozzles 12, two other solenoid-operated nozzles 11 and 13, are normally open in the middle.
In this embodiment, two stations are provided, and two valve bodies to be detected can be detected simultaneously.
In this embodiment, the execution module includes three electromagnetic pneumatic switching valves and four plugging cylinders, which are respectively a first electromagnetic pneumatic switching valve YV1, a second electromagnetic pneumatic switching valve YV2 and a second electromagnetic pneumatic switching valve YV3; 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 QG4;
the first electromagnetic pneumatic switching valve YV1 is used for controlling the first blocking cylinder QG1 and the third blocking cylinder QG3 to block the two normally open nozzles 12 and the 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 blocking cylinder QG2 to block 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 blocking cylinder QG4 to block the other two nozzles 13 of the valve body 1 to be detected;
the detection means, in this embodiment, is a leak detector 3.
The alarm device 4 comprises a green indicator light 41 and a red indicator light 42. When the detection passes, the green indicator lamp 41 is turned on, and when the detection fails, the red indicator lamp 42 is turned on. In the specific implementation, the alarm device 4 may also include an audible alarm and the like.
The control module, in this embodiment, is the 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 electromagnetic pneumatic switching valve, makes it control shutoff cylinder carry out shutoff operation to the nozzle, on the other hand, and it still can be to the solenoid valve power supply of detecting the valve body and open the solenoid valve, still can cut off the power supply or switch on the power supply to the solenoid valve as required. The signal of the leak detector 3 is connected with the control signal of the PLC.
When the device is used, the PLC program control cabinet 2 automatically completes three times of air tightness detection in sequence by pressing the first station starting button 21, namely, firstly, the device 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 the two normally open nozzles 12 and the air inlets 14 in the middle of the valve body 1 to be detected; after plugging, the leak detector 3 starts to perform air tightness 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 to control the second blocking cylinder QG2, so that the second blocking cylinder QG2 blocks the other two nozzles 11 of the valve body 1 to be detected; after the plugging, the leak detector 3 starts to perform the air tightness 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 to control the fourth blocking cylinder QG4, so that the fourth blocking cylinder QG4 blocks 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 start key while automatically detecting the system to also finish the same detection. If the workpiece has an air leakage system, the automatic judgment is not qualified, and a red indicator lamp is lightened 42 to give an alarm, so that manual intervention is needed. According to the system, the detection is indicated to start only by manual work at the beginning, the whole detection process is realized, the whole automatic operation is realized, and 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 a starting instruction and sends a plugging instruction to the execution module;
in this embodiment, the control module is a PLC program control cabinet 2; the execution module comprises three electromagnetic pneumatic switching valves and four plugging cylinders, and is identical to 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 is used for plugging 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 to enable the first blocking cylinder QG1 and the third blocking cylinder QG3 to block the two normally open nozzles 12 and the air inlets 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, in this embodiment, is a leak detector 3. Which detects the tightness of the two nozzles 12 and the air inlet 14.
S4: after the nozzles 12 are detected to be qualified, the PLC program control cabinet controls the second electromagnetic pneumatic switching valve to drive the second blocking cylinder QG2 to block the two nozzles 11 of the valve body to be detected; then the leak detector is used for detecting the air tightness of the two nozzles 11;
after the detection is passed, the PLC program control cabinet 2 controls the third electromagnetic pneumatic switching valve YV3 to control the fourth blocking cylinder QG4, so that the fourth blocking cylinder QG4 blocks 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 start key while automatically detecting the system to also finish the same detection.
The detection method is a full-automatic process, and has high efficiency compared with the manual detection in the prior art.
Example 3
Referring to fig. 5 and 6, the invention also discloses a fixture specially used for the air tightness detection system, which comprises a supporting component 5, a positioning component 6 and a sealing rubber pad 7, and specifically comprises the following steps:
the support assembly 5 includes a base plate 51, left and right posts 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 this embodiment, the positioning assembly 6 is a set of positioning blocks.
The plugging cylinders QG1, QG2 and QG4 are mounted on the upper plate 54, and a sealing rubber cushion 7 is arranged between the plugging cylinders and a 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 tool fixtures for the segmented valve body can be manufactured and used as tools for the first and second stations respectively. The valve body 1 is mounted on the jig by the positioning assembly, and then the detection process is started.
In the detection process, the electromagnetic valve plug-in power supply on the segmented valve body can be controlled to be powered on or powered off by the PLC program control cabinet 2 so as to control the opening and closing of the nozzle; and if the air leakage is unqualified, the alarm of lighting the red light needs manual intervention. One person can alternately and simultaneously operate the two stations, so that the production efficiency is further improved.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (7)
1. An air tightness detection system for detecting air tightness of a valve body, comprising: the 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 a 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 control module is also used for supplying power to the electromagnetic valve of the valve body to be detected and opening the electromagnetic valve;
the valve body (1) to be detected comprises an air inlet (14) and six nozzle holes, wherein the six nozzle holes are divided into two nozzles (12) with a normally open middle and two nozzles (11, 13) controlled by other two electromagnetic valves;
the execution module comprises an electromagnetic pneumatic switching valve and a blocking cylinder, wherein the electromagnetic pneumatic switching valve receives the control module instruction and controls the blocking cylinder to block a nozzle of a valve body to be detected;
the electromagnetic pneumatic switching valve comprises a first electromagnetic pneumatic switching valve YV1, a second electromagnetic pneumatic switching valve YV2 and a third electromagnetic pneumatic switching valve YV3;
the plugging air cylinders comprise a first plugging air cylinder QG1, a second plugging air cylinder QG2, a third plugging air cylinder QG3 and a fourth plugging air cylinder QG4;
the first electromagnetic pneumatic switching valve YV1 is used for controlling the first blocking cylinder QG1 and the third blocking cylinder QG3 to block two nozzles (12) and an air inlet (14) which are normally open in the middle of the valve body (1) to be detected; the second electromagnetic pneumatic switching valve YV2 is used for controlling the second blocking cylinder QG2 to block 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 blocking cylinder QG4 to block the other two nozzles (13) of the valve body (1) to be detected.
2. A gas tightness detection system according to claim 1 wherein: the valve body (1) to be detected is provided with two, the control module controls the two execution modules and the detection device to detect the air tightness of each valve body (1) to be detected.
3. A gas tightness detection system according to claim 1 wherein: the device also comprises an alarm device (4) for reminding the detection result.
4. A testing method using the air tightness testing system of any of claims 1-3, comprising:
s1: the control module receives a starting instruction and sends a plugging instruction to the execution module;
s2: the first electromagnetic pneumatic switching valve YV1 controls the first blocking cylinder QG1 and the third blocking cylinder QG3, and two normally open nozzles (12) and an air inlet (14) in the middle of the valve body (1) to be detected are blocked;
s3: the detection device detects the air tightness of the blocked nozzle (12) and the air inlet (14);
s4: after the nozzles (12) are detected to be qualified, the second electromagnetic pneumatic switching valve YV2 controls the second blocking cylinder QG2 to block the other two nozzles (11) of the valve body (1) to be detected, and the detection device detects the air tightness of the nozzles (11);
after the nozzles (11) are detected to be qualified, the third electromagnetic pneumatic switching valve YV3 controls the fourth blocking cylinder QG4 to block the other two nozzles (13) of the valve body (1) to be detected, and the detection device detects the air tightness of the nozzles (13);
after the nozzle (13) is detected to be qualified, the execution module loosens the valve body (1) to be detected.
5. A fixture dedicated to the air tightness detection system according to any of claims 1-3, characterized in that: the valve body to be detected (1) is arranged on the positioning component (6), and the execution module is arranged on the supporting component (5).
6. The fixture of an air tightness detection system according to claim 5, wherein: the supporting component (5) comprises a bottom plate (51), left and right stand columns (52, 53) and an upper plate (54), and the valve body (1) to be detected is arranged on the bottom plate (51) through the positioning component (6); the execution module is mounted on the upper plate (54).
7. The fixture of an air tightness detection system according to claim 6, wherein: the device further comprises a sealing rubber pad (7), wherein the sealing rubber pad (7) is arranged between the nozzle (11, 12, 13) of the valve body (1) to be detected and the execution module.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN202010929731.XA CN112213035B (en) | 2020-09-07 | 2020-09-07 | Air tightness detection system, detection method and special fixture |
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| CN112213035B true CN112213035B (en) | 2023-09-01 |
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| 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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