CN201716168U - Tightness test bench for high-pressure open and low-pressure open of liquefied petroleum gas cylinder valves - Google Patents
Tightness test bench for high-pressure open and low-pressure open of liquefied petroleum gas cylinder valves Download PDFInfo
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- CN201716168U CN201716168U CN2010202192959U CN201020219295U CN201716168U CN 201716168 U CN201716168 U CN 201716168U CN 2010202192959 U CN2010202192959 U CN 2010202192959U CN 201020219295 U CN201020219295 U CN 201020219295U CN 201716168 U CN201716168 U CN 201716168U
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 239000003915 liquefied petroleum gas Substances 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000001257 hydrogen Substances 0.000 abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Abstract
一种液化石油气瓶阀高压开启和低压开启密封检测台，属于检测仪器技术领域，其特征是：它主要由主框架、举升机构、侧封度机构、背力机构、传感器转换机构和排气机构组成。其检测方法是：测试气体低压采用0.05MPa氢气和氮气混和气，高压采用2.5MPa氢气和氮气混和气，具体比例为氢气占4％-6％，氮气占96％-94％，气敏传感器检测的气体为氢气。有益效果是：利用气敏传感器检测泄露和利用差压传感器的检测泄露相比较，气敏传感器检测泄露大幅度的缩减了检测时间，提高了检测效率，尤其对于100％检测的产品，其效率的提高相当明显，且精度高。
A liquefied petroleum gas cylinder valve high-pressure opening and low-pressure opening sealing detection platform, which belongs to the technical field of detection instruments, is characterized in that it is mainly composed of a main frame, a lifting mechanism, a side sealing mechanism, a back force mechanism, a sensor conversion mechanism and a drain Composition of air mechanism. The detection method is: the test gas uses 0.05MPa hydrogen and nitrogen mixed gas for low pressure, and 2.5MPa hydrogen and nitrogen mixed gas for high pressure. The specific ratio is 4%-6% hydrogen and 96%-94% nitrogen. Gas sensor detection The gas is hydrogen. The beneficial effect is: compared with the detection of leakage using the gas sensor and the detection of leakage using the differential pressure sensor, the gas sensor greatly reduces the detection time and improves the detection efficiency, especially for 100% detection products. The improvement is quite obvious, and the accuracy is high.
Description
Technical field
The utility model belongs to the detecting instrument technical field.
Background technology
At present, the manufacturer of China's liquefied petroleum gas cylinder valve is according to GB7512-2006 " liquefied petroleum gas cylinder valve examination criteria ", adopt water cannot detect the impermeability of liquefied petroleum gas cylinder valve, put into water after measured piece is full of air, whether have bubble produce, produce the degree of how much judging leakage of bubble by certain hour if observing.This method is simple to operate, do not need the higher technology of operating personnel, can determine the particular location of leakage, but this kind method is influenced by human factor, and error is bigger, can't carry out quantitative analysis to leakage, can't realize the production automation, production efficiency is low, need simultaneously to the workpiece after detecting dry, surface treatment such as anticorrosion, increased the detection cost.
Summary of the invention
The objective of the invention is: a kind of liquefied petroleum gas cylinder valve high-pressure opening and low-pressure opening encapsulation monitor station are provided, and it can be efficiently, the impermeability to liquefied petroleum gas cylinder valve detects quickly and accurately.
The technical scheme of high-pressure opening of the present invention and low-pressure opening encapsulation monitor station is: it mainly is made up of main frame, lifting mechanism, side seal degree mechanism, back strength mechanism, sensor throw-over gear and exhaust gear.
Main frame is the rectangle frame support body, on frame body, be fixed with deck plate, top board be positioned at deck plate directly over, 4 support columns are installed between top board and the linear bearing, support column and deck plate are by cylindrical seam location, and support column and top board are by cylindrical seam location.
Lifting mechanism is installed on the deck plate, following plugging block links to each other with spherical structure by T type groove with the lifting cylinder, but automatic aligning, the upper surface of following plugging block is equipped with circular shutoff pad, lifting cylinder both sides are equipped with the guide frame that is made of the axis of guide and linear bearing, linear bearing is fixed on the deck plate, the axis of guide is a right cylinder, can move up and down in deck plate, and the axis of guide and following plugging block all are fixed on the raising board, cylindrical seam location, the upper surface of following plugging block is a flange arrangement, and is connected with raising board, and 2 straight pins are installed on diagonal on the raising board, straight pin is connected with raising board, cylindrical seam location; Pallet is positioned at the raising board top, and by being installed in 2 straight pin location on the raising board, the top of pallet is equipped with mould, and the inner chamber of mould can hold measured piece for the imitative type of measured piece profile.
The below of top board is equipped with side seal stifled mechanism, back strength mechanism and sensor throw-over gear, the shutoff cylinder is fixed on the T-steel plate, cylindrical seam location, the shutoff cylinder is the cylinder that has guide frame, the T-steel plate is fixed on the top board, retaining valve relies on its inner cylinder to open or close, adopt end face seal structure, the upper surface has air intake opening, a right cylinder is protruded in the side, has external thread structure, by a nut with the shutoff spacers, internal bore communicates with air intake opening, and retaining valve is fixed on the shutoff cylinder.
The sensor transformational structure is positioned at the top of the stifled mechanism of side seal, the sensor conversion cylinder is fixed on the steel plate of a T type, sensor fixation plate is the rectangle nylon block, realize linking to each other with the structure of sphere by T type groove with the sensor conversion cylinder, but automatic aligning, sensor fixation plate is drilled with 2 holes along long side direction, and a gas sensor is installed in each hole; Spring assembly is enclosed within on the straight pin, straight pin one end is fixed on the steel plate, and the upper end is by nut holddown spring assembly, and the other end is fixed on the cavity, there is a L type part below of per 2 spring assemblies, and this part makes the upper surface pressing of the lower surface and the cavity of sensor fixation plate; Cavity is the cavity that holds measured piece, and is fixed on the contiguous block, and contiguous block is fixed on the top board, and the inner chamber of cavity communicates with in running order gas sensor.
Back strength mechanism is positioned at the opposite of the stifled mechanism of side seal, and the back strength cylinder is fixed on the linear bearing, cylindrical seam location; Back strength cylinder both sides are equipped with the guiding mechanism that is made of the axis of guide and back strength cylinder installing plate, and back strength cylinder installing plate is fixed on the linear bearing; The back strength plate is a T-steel plate, and the centre is a U type groove, and respectively there is a hole at the both shoulders place, and an end of the axis of guide is an external thread, passes this hole, screws by nut; The back strength plate links to each other with spherical structure by T type groove with the back strength cylinder, but automatic aligning, and the upper surface of back strength plate contacts with the lower surface of cavity; Linear bearing is fixed on the support column by 4 U type spares.
The top board top is exhaust gear and test gas path plate.Exhaust gear is made up of axial flow blower and the air channel that matches thereof, and test is with being equipped with gas admittance valve and vertical compression sensor on the gas path plate, and test gas enters test chamber by gas admittance valve.
The invention has the beneficial effects as follows: utilize the gas sensor detection of leaks and utilize the detection of leaks of differential pressure pick-up to compare, the gas sensor detection of leaks has significantly been reduced detection time, improved detection efficiency, especially for 100% product that detects, the raising of its efficient is quite obvious, and the precision height.
Description of drawings
Fig. 1 is master's TV structure figure of the present invention;
Fig. 2 is the present invention left side TV structure figure.
Embodiment
As shown in the figure, the 1st, burr adjustable tail margin, the 2nd, framework, the 3rd, the lifting cylinder, the 4th, the axis of guide, the 5th, linear bearing, the 6th, deck plate, the 7th, following plugging block, the 8th, the back strength cylinder, the 9th, the axis of guide, the 10th, back strength cylinder installing plate, the 11st, linear bearing, the 12nd, gas path plate, the 13rd, axial flow blower, the 14th, top board, the 15th, spring assembly, the 16th, contiguous block, the 17th, sensor fixation plate, the 18th, the sensor conversion cylinder, the 19th, the shutoff cylinder, the 20th, retaining valve, the 21st, coupling shaft, the 22nd, support column, the 23rd, cavity, the 24th, measured piece, the 25th, pallet, the 26th, the back strength plate, the 27th, raising board.
Checkout equipment can be divided into main frame, lifting mechanism, side seal degree mechanism, back strength mechanism, sensor throw-over gear and exhaust gear by function.
Main frame is made of burr adjustable tail margin 1, framework 2, deck plate 6, top board 14 and support column 22.Framework 2 is welded by the 40x40x5 square steel, is framed structure, and 4 burr adjustable tail margins 1 are equipped with in the below, and each column below respectively has 1, can adjust height up and down by the helicitic texture on the burr adjustable tail margin 1; Deck plate 6 is a rectangular steel plates, is fixed on the framework 2 by 8 M6 socket head cap screws; Top board 14 is a rectangular steel plates, be positioned at deck plate 6 directly over, 4 support columns 22 are installed between top board 14 and the linear bearing 5, support column 22 is a right cylinder, an end is a flange arrangement, the other end is an external thread, 22 of support columns support and positioning action; Support column 22 is located by cylindrical seam with deck plate 6, and 4 M5 socket head cap screws connect, and support column 22 and top board 14 are by cylindrical seam location, and 1 M16 nut is fixed.
Lifting mechanism is made of lifting cylinder 3, the axis of guide 4, linear bearing 5, following plugging block 7, pallet 25 and raising board 27, is installed on the deck plate 6.Lifting cylinder 3 connects by 4 M10 socket head cap screws, cylindrical seam location; Following plugging block 7 links to each other with spherical structure by T type groove with lifting cylinder 3, but automatic aligning, and the upper surface of following plugging block 7 is equipped with circular shutoff pad, by a nut fast changeable shutoff pad; For preventing to rotate, lifting cylinder 3 both sides are equipped with the guide frame that is made of the axis of guide 4 and linear bearing 5, and linear bearing 5 is fixed on the deck plate 6 by 4 M5 socket head cap screws, and the axis of guide 4 is a right cylinder, can move up and down in deck plate 6; The axis of guide 4 and following plugging block 7 all are fixed on the raising board 27, cylindrical seam location, and raising board 27 is square steel plate; The upper surface of following plugging block 7 is a flange arrangement, is connected with raising board 27 by 4 M6 socket head cap screws, and the axis of guide 4 is fixed by 1 M8 socket head cap screw; 2 Φ 16 straight pins are installed on diagonal on the raising board 27, and straight pin is connected with raising board 27 by the M10 helicitic texture, cylindrical seam location; Pallet 25 is square pallet, is positioned at raising board 27 tops, and by being installed in 2 straight pin location on the raising board 27, during work, the lower surface of the upper surface of raising board 27 and pallet 25 fits tightly; The top of pallet 25 is equipped with mould, and the inner chamber of mould can hold measured piece 24 for the imitative type of measured piece profile, and outside surface is a right cylinder, and by cylindrical seam location, 4 M5 socket head cap screws are fixed.
The below of top board 14 is equipped with side seal stifled mechanism, back strength mechanism and sensor throw-over gear.The stifled mechanism of side seal is made of shutoff cylinder 19 and retaining valve 20.Shutoff cylinder 19 is fixed on the T-steel plate by 2 M8 socket head cap screws, cylindrical seam location, and shutoff cylinder 19 is for having the cylinder of guide frame, and the T-steel plate is fixed on the top board 14 by 2 M8 socket head cap screws; Retaining valve 20 relies on its inner cylinder to open or close, adopt end face seal structure, the upper surface has air intake opening, a right cylinder is protruded in the side, have external thread structure, with the shutoff spacers, and can be at any time change the shutoff pad by unscrewing nut by a nut, internal bore communicates with air intake opening, and retaining valve 20 is fixed on the shutoff cylinder 19 by 2 M6 socket head cap screws.
The sensor transformational structure is positioned at the top of the stifled mechanism of side seal, is made of spring assembly 15, contiguous block 16, sensor fixation plate 17, sensor conversion cylinder 18 and cavity 23.Sensor conversion cylinder 18 is fixed on the steel plate of a T type by 2 M5 socket head cap screws, sensor fixation plate 17 is the rectangle nylon block, link to each other with sensor conversion cylinder 18 with the structure of sphere by T type groove, but automatic aligning, sensor fixation plate 17 is drilled with 2 holes along long side direction, and a gas sensor is installed in each hole; Spring assembly 15 is enclosed within on the straight pin, totally 4,4 straight pin one ends are fixed on the foursquare steel plate, the upper end is by 4 nut holddown spring assemblies 15, the other end is fixed on the cavity 23, there is a L type part below of per 2 spring assemblies 15, and this part makes the upper surface pressing of the lower surface and the cavity 23 of sensor fixation plate 17; Cavity 23 is for holding the cavity of measured piece, and profile is cylindrical, is fixed on the contiguous block 16 by 4 M5 socket head cap screws, contiguous block 16 is a rectangular steel plates, 2 of quantity, on top board 14, the inner chamber of cavity 23 communicates with in running order gas sensor by 4 M8 screw retention.
Back strength mechanism is positioned at the opposite of the stifled mechanism of side seal, is made of back strength cylinder 8, the axis of guide 9, back strength cylinder installing plate 10, linear bearing 11 and back strength plate 26.Back strength cylinder 8 is fixed on the linear bearing 11 by 4 M10 socket head cap screws, cylindrical seam location; Back strength cylinder 8 both sides are equipped with the guiding mechanism that is made of the axis of guide 9 and back strength cylinder installing plate 10, and back strength cylinder installing plate 10 is fixed on the linear bearing 11 by 4 M4 socket head cap screws; Back strength plate 26 is a T-steel plate, and the centre is a U type groove, and respectively there is a hole at the both shoulders place, and an end of the axis of guide 9 is an external thread, passes this hole, screws by nut; Back strength plate 26 links to each other with spherical structure by T type groove with back strength cylinder 8, but automatic aligning, and the upper surface of back strength plate 26 contacts with the lower surface of cavity 23; Linear bearing 11 is a rectangular steel plates, is fixed on the support column 22 by 4 U type spares.
The checkout equipment course of action:
In mould, put into measured piece, open gas admittance valve, after the vertical compression sensor reaches requirement to test pressure, the piston rod of lifting cylinder 3 stretches out, lifting mechanism drives measured piece and upwards arrives primary importance, the piston rod of back strength cylinder 8 stretches out, and the U type groove of back strength plate 26 entangles measured piece, the lifting mechanism arrival second place that continues to move up.At this moment, the lower surface of back strength plate 26 contacts with the boss place of measured piece, and this position is a test position, and the circular shutoff pad of following plugging block 7 upper surfaces is sealed the air intake opening of measured piece, and measured piece enters in cavity 23 cavitys fully.The piston rod of shutoff cylinder 19 stretches out, the gas outlet that measured piece is sealed by the stifled mechanism of side seal, the piston rod of shutoff cylinder 19 stretches out or withdraws, a certain gas sensor is communicated with the cavity of cavity 23, the cylinders retract of retaining valve 20 inside, test gas enters the measured piece cavity, begins to carry out leak-testing.Detection finishes, and the cylinder of retaining valve 20 inside stretches out, and gas exhauster is purchased energized, start working, and the withdrawal of the stifled mechanism of side seal, lifting mechanism falls back to primary importance, the withdrawal of back strength mechanism, lifting mechanism falls back to initial position.When the gas sensor magnitude of voltage was stablized, the outage of air draft mechanism quit work, and places new part, and a beginning new round detects.
Principle of work:
Test gas is the mixed air of 4%-6% hydrogen and 96%-94% nitrogen, and gas sensor detects hydrogen.When measured piece has leakage, gas sensor detects hydrogen and produces electric signal output, gas sensor is uploaded to electric signal the analog module of PLC, PLC converts the electrical signal to the PPM of hydrogen earlier, convert amount of leakage (ml/h) to according to its PPM again, afterwards, PLC will measure the amount of leakage numerical value and the standard value of gained and make comparisons, and it is qualified to judge whether.
Detection method
This checkout equipment adopts the method for gas sensor detected gas concentration that the liquefied petroleum gas cylinder valve impermeability is detected, test gas low pressure adopts 0.05MPa hydrogen and nitrogen mixed air, high pressure adopts 2.5MPa hydrogen and nitrogen mixed air, concrete ratio is that hydrogen accounts for 4%-6%, nitrogen accounts for 96%-94%, and the gas that gas sensor detects is hydrogen.
Liquefied petroleum gas cylinder valve is in opening, and promptly air intake opening and gas outlet communicate, gas sensor is placed on liquefied petroleum gas cylinder valve handwheel above.Liquefied petroleum gas cylinder valve is placed in the cylindrical test cavity, and with air intake opening and gas outlet sealing.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202192959U CN201716168U (en) | 2010-06-09 | 2010-06-09 | Tightness test bench for high-pressure open and low-pressure open of liquefied petroleum gas cylinder valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202192959U CN201716168U (en) | 2010-06-09 | 2010-06-09 | Tightness test bench for high-pressure open and low-pressure open of liquefied petroleum gas cylinder valves |
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| Publication Number | Publication Date |
|---|---|
| CN201716168U true CN201716168U (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202192959U Expired - Lifetime CN201716168U (en) | 2010-06-09 | 2010-06-09 | Tightness test bench for high-pressure open and low-pressure open of liquefied petroleum gas cylinder valves |
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| Country | Link |
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| CN (1) | CN201716168U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886970A (en) * | 2010-06-09 | 2010-11-17 | 长春工业大学 | LPG cylinder valve high-pressure opening and low-pressure opening sealing testing platform and testing method |
| CN106643941A (en) * | 2016-12-28 | 2017-05-10 | 宁波考比锐特汽车科技有限公司 | Mold testing device |
-
2010
- 2010-06-09 CN CN2010202192959U patent/CN201716168U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886970A (en) * | 2010-06-09 | 2010-11-17 | 长春工业大学 | LPG cylinder valve high-pressure opening and low-pressure opening sealing testing platform and testing method |
| CN101886970B (en) * | 2010-06-09 | 2012-08-29 | 长春工业大学 | Detection platform and detection method for high-pressure opening and low-pressure opening encapsulation of liquefied petroleum gas cylinder valve |
| CN106643941A (en) * | 2016-12-28 | 2017-05-10 | 宁波考比锐特汽车科技有限公司 | Mold testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110119 Effective date of abandoning: 20120829 |