CN102749175A - Device for testing air tightness of four-way valve - Google Patents
Device for testing air tightness of four-way valve Download PDFInfo
- Publication number
- CN102749175A CN102749175A CN2012102530592A CN201210253059A CN102749175A CN 102749175 A CN102749175 A CN 102749175A CN 2012102530592 A CN2012102530592 A CN 2012102530592A CN 201210253059 A CN201210253059 A CN 201210253059A CN 102749175 A CN102749175 A CN 102749175A
- Authority
- CN
- China
- Prior art keywords
- pipe
- way valve
- elevating mechanism
- cylinder
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a device for testing the air tightness of a four-way valve. A cylinder body of a cylinder is fixedly connected with a rack; a piston rod is fixedly connected with an elevating mechanism; the elevating mechanism is in sliding fit with a guide track of the rack so as to make linear reciprocated movement; a space for accommodating the four-way valve is arranged between a pressing plane and a rising plane of the elevating mechanism; the elevating mechanism is used for respectively applying action forces with opposite directions to the wall of a main tube along the radial direction of the main tube of the four-way valve through the pressing plane and the rising plane; four plugging columns are fixed on the rack; and the head parts of the four plugging columns are respectively provided with sealing heads for sealing nozzles of branch tubes of the four-way valve correspondingly; and a limiting rod is fixed on the rack and can be used for preventing the piston rod from moving continuously along the original direction while the sealing heads of the four plugging columns accomplish the sealing to the nozzles of the branch tubes of the four-way valve. With the adoption of the device, the labor cost can be reduced, and the measuring efficiency can be increased.
Description
Technical field
The present invention relates to a kind of four-way valve air tightness test device, especially relate to a kind of four-way valve air tightness test device of four-way valve automated production process.
Background technology
Four-way valve, the hydraulic valve term is the operation valve with four hydraulic fluid ports.Four-way valve is indispensable parts in the refrigeration plant, and its principle of work is, when electromagnetic valve coil is in off-position; Guide's guiding valve moves to left under the right side compression spring drives, and gases at high pressure get into the right-hand member plunger shaft after getting into kapillary, on the other hand; The gas of left end plunger shaft is discharged, because there is pressure reduction in the piston two ends, piston and main slide valve move to left; Gas outlet is taken over off-premises station communicated, two adapters communicate in addition, form refrigeration cycle.And and even whether welding has leakage (being whether the four-way valve impermeability is good) to be directly connected to the performance of the four-way valve quality of refrigeration system between each pipe.Therefore enterprise is in production and product export test, and the four-way valve air tightness test is extremely important.
The following problem of domestic existing four-way valve air tightness test device ubiquity:
1. it is low to detect automaticity.After testing process is to the valve body ventilation, directly manually valve is immersed in the water, whole test process all needs artificial the participation;
2. measuring accuracy is lower.In testing process, owing to do not accomplish excellent pressure maintaining, make the gas that feeds valve body just leak water-immersed the time not having, thereby caused test result inaccurate;
3. pilot valve air tightness test device all need give each station configuration an operator mostly, and labor cost is high, and production efficiency is low, is not suitable for large-scale production;
4. though the valve body material is made of copper, the water inspection still can cause corrosion to a certain degree to valve body, thereby influences life of product;
5. because test process is not robotization, it is slow that operating personnel move the unskilled test speed that will cause.
Summary of the invention
In order to solve the problem that exists in the background technology, the object of the present invention is to provide a kind of four-way valve air tightness test device.
The technical solution adopted for the present invention to solve the technical problems is: four-way valve air tightness test device of the present invention comprises frame, cylinder, elevating mechanism, gag lever post and four stifled posts; The cylinder body of said cylinder is fixedly connected with frame, and the piston rod of cylinder is fixedly connected with elevating mechanism; Said frame is provided with guide rail, and said elevating mechanism and guide rail are slidingly matched, and elevating mechanism can be done straight reciprocating motion along guide rail under the drive of the piston rod of cylinder; Said elevating mechanism is provided with the relative following pressure surface and the face that hoists, and said pressure surface down and hoisting is provided with the person in charge's who is used to hold four-way valve space between the face; Said four stifled posts are fixed on the frame, and the head of four stifled posts is respectively equipped with the seal head that is used for accordingly the ferrule of E pipe, S pipe, C pipe and the D pipe of four-way valve; Elevating mechanism can be along radially the applying in E pipe, S pipe, C pipe and the D pipe that seal head that acting force makes four stifled posts extend into four-way valve accordingly respectively to the tube wall of being responsible for and accomplish sealing of the person in charge of four-way valve through following pressure surface, and elevating mechanism can radially apply E pipe, S pipe, the C pipe that seal head that acting force makes four stifled posts correspondingly breaks away from four-way valve to the tube wall of being responsible for along what four-way valve was responsible for through the face of hoisting; Said gag lever post is fixed on the frame, and this gag lever post can prevent said piston rod to continue to move along former direction when the seal head of said four stifled posts is accomplished the sealing of the mouth of pipe of E pipe, S pipe, C pipe and D pipe to four-way valve.
Further, frame according to the invention is provided with the brace table that has through hole, and the cylinder body of cylinder places on the brace table and with brace table and is fixedly connected; Said elevating mechanism comprises slide block, ear type suspension hook and is provided with the web member of threaded hole; The said respectively pressure surface down in two relative surfaces of the inner chamber of ear type suspension hook and the face that hoists; Slide block is fixedly connected through said web member with ear type suspension hook; The piston rod of cylinder passes the said through hole of brace table and the said threaded hole of web member; And the piston rod of cylinder is threaded with the said threaded hole of web member, and said slide block and guide rail are slidingly matched, and slide block can be done straight reciprocating motion along guide rail under the drive of the piston rod of cylinder.
Further, the present invention also comprises stop collar, and said stop collar is fixedly connected with web member, and the piston rod of cylinder can extend in the stop collar.
Further, frame according to the invention is provided with first riser and second riser concurrently; In the relative two ends of first riser one is fixedly connected with bearing, and another is fixedly connected with brace table; In the relative two ends of second riser one is fixedly connected with bearing, and another is fixedly connected with brace table; Said guide rail is fixedly installed on second riser, makes elevating mechanism to do straight reciprocating motion by a direction to another in the said relative two ends of second riser.
The present invention compared with prior art, the beneficial effect that has is:
1. it is higher to detect automaticity: realized each the arm seal process of four-way valve and the robotization of testing process, practiced thrift labor cost greatly, improved testing efficiency;
2. measuring accuracy is high: before detecting impermeability, utilize physical construction that the O type circle of seal head is applied acting force, make it produce distortion, and each inside pipe wall of fitting better, thus make the sealing effectiveness of each pipe better, guaranteed measuring accuracy.
3. test process is little to the damage of four-way valve: because whole process is carried out in air, the contact position of each arm of seal head and four-way valve has rubber o-ring to shield, and has reduced the influence of test to the four-way valve quality to the full extent.
Description of drawings
Fig. 1 is that apparatus of the present invention are carried out the original state synoptic diagram that impermeability detects to four-way valve;
Fig. 2 is the synoptic diagram of apparatus of the present invention when four-way valve is in sealing state.
Fig. 3 is the structural representation of a kind of embodiment of frame of the present invention.
Fig. 4 is that the position between elevating mechanism of the present invention, cylinder and the gag lever post concerns synoptic diagram.
Among the figure: 1, cylinder, 2, brace table, 3, slide block, 4, guide rail, 5, second riser, 6, first riser; 7, web member, 8, stop collar, 9, ear type suspension hook, 10, the person in charge of four-way valve, 11, gag lever post; 12, E pipe plug post, 13, D pipe plug post, 14, S pipe plug post, 15, C pipe plug post, 16, second base plate; 17, first base plate, 18, E pipe plug post supporting seat, 19, D pipe plug post hold-down nut, 20, C pipe plug post supporting seat, 21, S pipe plug post clip; 22, ear type suspension hook stationary platform, 23, the face that hoists, 24, pressure surface down, 25, four-way valve E pipe, 26, four-way valve D pipe.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the present invention is described further.
To shown in Figure 4, the present invention includes frame, cylinder 1, elevating mechanism, gag lever post 11 and four stifled posts like Fig. 1, four stifled posts are respectively E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13.
The cylinder body of cylinder 1 is fixedly connected with frame, and the piston rod of cylinder 1 is fixedly connected with elevating mechanism.
Frame is provided with guide rail 4, and elevating mechanism and guide rail 4 are slidingly matched, and elevating mechanism can carry out straight reciprocating motion along guide rail 4 under the drive of the piston rod of cylinder 1.
Elevating mechanism is provided with two relative surfaces, promptly descends pressure surface 24 and hoists face 23.In the embodiment shown in fig. 1, the face 23 that hoists is positioned at the down below of pressure surface 24, and following pressure surface 24 and hoisting is provided with between the face 23 and is used to hold four-way valve and is responsible for 10 space.When the piston rod of cylinder 1 moves downward; Drive elevating mechanism along guide rail 4 downward slippages; When elevating mechanism slides onto it down pressure surface 24 contacts with the person in charge 10 of four-way valve; Following pressure surface 24 radially applies downward acting force to the tube wall of being responsible for along the person in charge's 10 of four-way valve, thereby makes the seal head of four stifled posts extend in E pipe, S pipe, C pipe and the D pipe of four-way valve accordingly respectively and accomplish sealing.When the piston rod of cylinder 1 moves upward; Drive elevating mechanism along guide rail 4 upwards slippages; When elevating mechanism slides onto its face 23 that hoists and contacts with the person in charge 10 of four-way valve, hoist face 23 along four-way valve be responsible for 10 radially the tube wall of being responsible for is applied acting force upwards, thereby make the seal head of four stifled posts correspondingly break away from E pipe, S pipe, the C pipe of four-way valve.
E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 are fixed on the bearing of frame, and the distribution of E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 is corresponding with the distribution of the E of four-way valve pipe 25, S pipe (not shown), C pipe (not shown) and D pipe 26.Four stifled posts 12,13,14,15 are positioned at the below of pressure surface 24 down, and the head of four stifled posts is respectively equipped with and is used for accordingly the seal head that the mouth of pipe with E pipe 25, S pipe, C pipe and the D pipe 26 of four-way valve seals simultaneously.As preferred version of the present invention, can the O RunddichtringO be installed on seal head with the lift-off seal effect.
In Fig. 1; Gag lever post 11 is fixed on the bearing 17 of frame and is positioned at the below of the piston rod of cylinder 1, and this gag lever post 11 can prevent piston rod to continue to move downward when the seal head of E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 is accomplished the sealing of the mouth of pipe of E pipe 25, S pipe, C pipe and D pipe 26 to four-way valve.
As one embodiment of the present invention, shown in Fig. 1-4, frame is provided with the brace table 2 that has through hole, and the cylinder body of cylinder 1 places on the brace table 2 and with brace table 2 and is fixedly connected.Elevating mechanism comprises slide block 3, ear type suspension hook 9 and is provided with the web member 7 of threaded hole; The upper surface of the inner chamber of ear type suspension hook 9 is following pressure surface 24; The lower surface of the inner chamber of ear type suspension hook 9 is the face of hoisting 23; Slide block 3 is fixedly connected through web member 7 with ear type suspension hook 9, and the piston rod of cylinder 1 passes the said through hole of brace table 2 and the said threaded hole of web member 7 downwards successively, and the piston rod of cylinder 1 is threaded with the threaded hole of web member 7; Slide block 3 is slidingly matched with guide rail 4, and slide block 3 can carry out the straight reciprocating motion of vertical direction along guide rail 4 under the drive of the piston rod of cylinder 1.
As another embodiment of the invention; Frame is provided with first riser 6 and second riser 5 concurrently; The bottom of first riser 6 and second riser 5 all is fixedly connected with bearing 17, and the top of first riser 6 and second riser 5 all is fixedly connected with the lower surface of brace table 2.Guide rail 4 is fixedly installed in the side of second riser 5, and elevating mechanism can be made rectilinear motion up and down reciprocatingly along slide rail 4.
As preferred implementation of the present invention; The below of web member 7 is provided with stop collar 8; Stop collar 8 is fixedly connected with web member 7, and the piston rod of cylinder 1 can extend in the stop collar 8, and the axis that guarantees piston rod and gag lever post 11 in each spacing process thus is on same straight line.
When utilizing apparatus of the present invention that four-way valve is carried out the impermeability detection; Referring to Fig. 1; At first the person in charge 10 of four-way valve is placed the following pressure surface 24 of elevating mechanism and the cavity between the face 23 of hoisting in, and the seal head of E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 upwards is inserted in E pipe 25, S pipe, C pipe and the D pipe 26 of four-way valve accordingly.Then, the piston rod of cylinder 1 moves downward, and drives elevating mechanism and moves downward along guide rail 4.When the following pressure surface 24 of elevating mechanism contacts with the person in charge's 10 of four-way valve tube wall; Following pressure surface 24 radially applies downward acting force to the person in charge's 10 of four-way valve tube wall along the person in charge's 10 of four-way valve, and the seal head that four-way valve is pressed down the head that makes E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 continues to extend in E pipe 25, S pipe, C pipe and the D pipe 26 of four-way valve accordingly.When the seal head of E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and D pipe plug post 13 upper ends is just in time accomplished the sealing of E pipe 25, S pipe, C pipe and D26 pipe to four-way valve simultaneously; The piston rod of cylinder 1 move downward to gag lever post 11 offset (as shown in Figure 2); Make the piston rod of cylinder 1 no longer continue to move downward; Thus, elevating mechanism also no longer continues to move downward.At this moment, the gas of the E of past four-way valve pipe 25, S pipe, C pipe and D26 pipe feeding certain pressure intensity carries out air tightness test.After air tightness test was accomplished, the piston rod of cylinder 1 moved upward, and drove elevating mechanism and moved upward along guide rail 4.When the face that hoists 23 of elevating mechanism contacts with the person in charge's 10 of four-way valve tube wall; Face 23 radially four-way valve is responsible for 10 tube wall and applies acting force upwards along the person in charge 10 of four-way valve hoists; The face that hoists 23 of elevating mechanism breaks away from the seal head of E pipe 25, S pipe, C pipe and D pipe 26 and E pipe plug post 12, S pipe plug post 14, C pipe plug post 15 and the D pipe plug post 13 of four-way valve thus; And four-way valve taken away from elevating mechanism, so far accomplish the air tightness test of four-way valve.
Claims (4)
1. a four-way valve air tightness test device is characterized in that: comprise frame, cylinder, elevating mechanism, gag lever post and four stifled posts;
The cylinder body of said cylinder is fixedly connected with frame, and the piston rod of cylinder is fixedly connected with elevating mechanism;
Said frame is provided with guide rail (4), and said elevating mechanism and guide rail (4) are slidingly matched, and elevating mechanism can be done straight reciprocating motion along guide rail (4) under the drive of the piston rod of cylinder;
Said elevating mechanism is provided with relative following pressure surface (24) and the face that hoists (23), is provided with the person in charge's (10) who is used to hold four-way valve space between said pressure surface (24) down and the face that hoists (23); Said four stifled posts are fixed on the frame, and the head of four stifled posts is respectively equipped with the seal head that is used for accordingly the ferrule of E pipe, S pipe, C pipe and the D pipe of four-way valve; Elevating mechanism can be along radially the applying in E pipe, S pipe, C pipe and the D pipe that seal head that acting force makes four stifled posts extend into four-way valve accordingly respectively to the tube wall of being responsible for (10) and accomplish sealing of the person in charge (10) of four-way valve through following pressure surface (24), and elevating mechanism radially applies E pipe, S pipe, the C pipe that seal head that acting force makes four stifled posts correspondingly breaks away from four-way valve to the tube wall of being responsible for through what the face of hoisting can be responsible for (10) along four-way valve;
Said gag lever post (11) is fixed on the frame, and this gag lever post (11) can prevent said piston rod to continue to move along former direction when the seal head of said four stifled posts is accomplished the sealing of the mouth of pipe of E pipe, S pipe, C pipe and D pipe to four-way valve.
2. four-way valve air tightness test device according to claim 1 is characterized in that: said frame is provided with the brace table (2) that has through hole, and the cylinder body of cylinder (1) places on the brace table and with brace table (2) and is fixedly connected; Said elevating mechanism comprises slide block (3), ear type suspension hook (9) and is provided with the web member (8) of threaded hole; Two relative surfaces of the inner chamber of ear type suspension hook (9) said respectively pressure surface (24) and the face that hoists (23) down; Slide block (3) is fixedly connected through said web member (8) with ear type suspension hook (9); The piston rod of cylinder (1) passes the said through hole of brace table (2) and the said threaded hole of web member (7); And the piston rod of cylinder is threaded with the said threaded hole of web member (7); Said slide block (3) is slidingly matched with guide rail (4), and slide block (3) can be done straight reciprocating motion along guide rail (4) under the drive of the piston rod of cylinder (1).
3. four-way valve air tightness test device according to claim 2 is characterized in that: also comprise stop collar (8), said stop collar (8) is fixedly connected with web member (7), and the piston rod of cylinder can extend in the stop collar.
4. four-way valve air tightness test device according to claim 2 is characterized in that: said frame is provided with first riser (6) and second riser (5) concurrently; In the relative two ends of first riser (6) one is fixedly connected with bearing (17), and another is fixedly connected with brace table (2); In the relative two ends of second riser (5) one is fixedly connected with bearing (17), and another is fixedly connected with brace table (2); Said guide rail (4) is fixedly installed on second riser (5), makes elevating mechanism to do straight reciprocating motion by a direction to another in the said relative two ends of second riser (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253059.2A CN102749175B (en) | 2012-07-22 | 2012-07-22 | Device for testing air tightness of four-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253059.2A CN102749175B (en) | 2012-07-22 | 2012-07-22 | Device for testing air tightness of four-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102749175A true CN102749175A (en) | 2012-10-24 |
| CN102749175B CN102749175B (en) | 2015-02-25 |
Family
ID=47029543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210253059.2A Expired - Fee Related CN102749175B (en) | 2012-07-22 | 2012-07-22 | Device for testing air tightness of four-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102749175B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994870A (en) * | 2013-02-20 | 2014-08-20 | 珠海格力电器股份有限公司 | Detection apparatus and detection method for four-way valve |
| CN105334046A (en) * | 2015-12-14 | 2016-02-17 | 芜湖三花自控元器件有限公司 | High-pressure reversing device used for four-way valve and detection method |
| CN105665298A (en) * | 2016-01-18 | 2016-06-15 | 上海比泽机电设备科技有限公司 | Full-automatic internal leakage test board for four-way valve |
| CN108061642A (en) * | 2017-07-24 | 2018-05-22 | 宁波方太厨具有限公司 | Valve body test device |
| CN110207898A (en) * | 2019-07-02 | 2019-09-06 | 中国计量大学上虞高等研究院有限公司 | A kind of PE heat fusion welded fitting leakage detection apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190878A (en) * | 1993-12-27 | 1995-07-28 | Mitsubishi Heavy Ind Ltd | Flaw detection method of filter |
| CN2837808Y (en) * | 2005-08-18 | 2006-11-15 | 大连现代辅机开发制造有限公司 | Rigid caging device for plug |
| KR100897578B1 (en) * | 2008-01-10 | 2009-05-15 | (주)성동테크 | Leaking test apparatus of sealing parts |
| CN201555694U (en) * | 2009-11-03 | 2010-08-18 | 广州新龙浩工业设备有限公司 | Fixture for sealing four-way valve |
| CN201859040U (en) * | 2010-11-08 | 2011-06-08 | 江苏江旭铸造集团有限公司 | Lifting air tightness testing machine |
| CN202720090U (en) * | 2012-07-22 | 2013-02-06 | 中国计量学院 | Four-way valve air tightness test device |
-
2012
- 2012-07-22 CN CN201210253059.2A patent/CN102749175B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190878A (en) * | 1993-12-27 | 1995-07-28 | Mitsubishi Heavy Ind Ltd | Flaw detection method of filter |
| CN2837808Y (en) * | 2005-08-18 | 2006-11-15 | 大连现代辅机开发制造有限公司 | Rigid caging device for plug |
| KR100897578B1 (en) * | 2008-01-10 | 2009-05-15 | (주)성동테크 | Leaking test apparatus of sealing parts |
| CN201555694U (en) * | 2009-11-03 | 2010-08-18 | 广州新龙浩工业设备有限公司 | Fixture for sealing four-way valve |
| CN201859040U (en) * | 2010-11-08 | 2011-06-08 | 江苏江旭铸造集团有限公司 | Lifting air tightness testing machine |
| CN202720090U (en) * | 2012-07-22 | 2013-02-06 | 中国计量学院 | Four-way valve air tightness test device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994870A (en) * | 2013-02-20 | 2014-08-20 | 珠海格力电器股份有限公司 | Detection apparatus and detection method for four-way valve |
| CN105334046A (en) * | 2015-12-14 | 2016-02-17 | 芜湖三花自控元器件有限公司 | High-pressure reversing device used for four-way valve and detection method |
| CN105665298A (en) * | 2016-01-18 | 2016-06-15 | 上海比泽机电设备科技有限公司 | Full-automatic internal leakage test board for four-way valve |
| CN108061642A (en) * | 2017-07-24 | 2018-05-22 | 宁波方太厨具有限公司 | Valve body test device |
| CN108061642B (en) * | 2017-07-24 | 2023-11-21 | 宁波方太厨具有限公司 | Valve body testing device |
| CN110207898A (en) * | 2019-07-02 | 2019-09-06 | 中国计量大学上虞高等研究院有限公司 | A kind of PE heat fusion welded fitting leakage detection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102749175B (en) | 2015-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102749175B (en) | Device for testing air tightness of four-way valve | |
| CN202018363U (en) | Multi-headed pressure testing machine for pipes | |
| CN202720090U (en) | Four-way valve air tightness test device | |
| CN203479471U (en) | A fuel tank air impermeability testing apparatus | |
| CN203981353U (en) | A kind of valve body moulding hydraulic pressure leak test checkout equipment | |
| CN104330216A (en) | Clamping device of seal test bed | |
| CN103217259A (en) | Pressure seal test machine | |
| CN202547912U (en) | Valve pressure testing device | |
| CN204269481U (en) | Gas cylinder by hydrostatic pressure test automatic test machine | |
| CN111256994A (en) | Rolling bearing fault diagnosis simulation experiment device | |
| CN102865971B (en) | Ceramic sanitary appliance detection system | |
| CN202210013U (en) | Bend pipe airtightness testing machine | |
| CN102818698B (en) | Main valve assembly test device for four-way valve | |
| CN211013477U (en) | Automatic pressure testing device for gas cylinder | |
| CN209945649U (en) | Sealing leakage detection device for pressure gauge | |
| CN203053645U (en) | Water nozzle hydraulic-pressure and air-pressure sealing detector | |
| CN205404056U (en) | Valve stem air tightness testing device | |
| CN210243114U (en) | Bellows leakproofness detection device | |
| CN206132315U (en) | Gas tightness detection device of fuel pump | |
| CN102539076B (en) | Pilot valve air tightness testing device | |
| CN203881495U (en) | Automatic rapid airtight detection device | |
| CN103776593A (en) | Automatic and quick airtightness detection device | |
| CN109855949B (en) | Metal pipe hydraulic test exhaust system | |
| CN202793754U (en) | Main valve assembly testing device of four-way valve | |
| CN207300486U (en) | A kind of brake casing pressure detecting frock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20160722 |