CN110095230A - A kind of engine cylinder cover oil duct leakage testing device - Google Patents
A kind of engine cylinder cover oil duct leakage testing device Download PDFInfo
- Publication number
- CN110095230A CN110095230A CN201910415502.3A CN201910415502A CN110095230A CN 110095230 A CN110095230 A CN 110095230A CN 201910415502 A CN201910415502 A CN 201910415502A CN 110095230 A CN110095230 A CN 110095230A
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- power transmission
- cylinder
- transmission track
- oil duct
- testing device
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/025—Details with respect to the testing of engines or engine parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The present invention relates to start field of machining technology, specifically a kind of engine cylinder cover oil duct leakage testing device, the oil duct leakage testing device includes power transmission track, for blocking the sealing device of cylinder cap surrounding oilhole and the inlet duct being arranged in right above power transmission track, the sealing device includes several spaced closure cylinders of conveying direction along power transmission track, all output ends for blocking cylinder are equipped with block head, the inlet duct includes gas handling system and the first lifting hydraulic cylinder, the gas handling system includes hoistable platform and admission line and closure column cap, solenoid valve is mounted at the top of each admission line, all solenoid valves are communicated with gas pipeline, the gas pipeline is communicated with air pump, power transmission track can be improved the transfer efficiency of cylinder cap, it is improved by sealing device and blocks efficiency , oil duct leak test detection efficiency is improved, engine factory rate is reduced.
Description
Technical field
The present invention relates to start field of machining technology, specifically a kind of engine cylinder cover oil duct leakage testing device.
Background technique
Existing online engine cylinder cover leakage tester mostly uses one-to-one station type, due to the complexity of engine cylinder cover,
It needs to position engine cylinder cover, causes to be transported to leak test station from conveying station and need to convey back and forth, existing detection
Mode needs that several are blocked by other since the intracavitary port of the type of cylinder cap is more before carrying out leak test, existing closure
Mode is covered by panel identical with cylinder cap end face structure, is blocked for each hole, block efficiency compared with
It is low, it is lower to testing efficiency is caused, it may appear that the case where cylinder cap defect rate increases is transported to leak test station needs from conveying station
The mode conveyed back and forth, so that the transfer efficiency of cylinder cap is lower.
Summary of the invention
The purpose of the present invention is to provide a kind of engine cylinder cover oil duct leakage testing devices, to solve to mention in above-mentioned background technique
Out the problem of.
The technical scheme is that a kind of engine cylinder cover oil duct leakage testing device, the oil duct leakage testing device include
Power transmission track, the sealing device for blocking cylinder cap surrounding oilhole and the air inlet dress being arranged in right above power transmission track
It sets, the sealing device is placed in power transmission track side, and the sealing device includes several along power transmission rail
The spaced closure cylinder of the conveying direction in road, all output ends for blocking cylinder are equipped with block head, the air inlet
Device includes gas handling system and the first lifting hydraulic cylinder for driving gas handling system to go up and down, and the gas handling system includes to rise
Drop platform, several be vertically installed at the admission line and several closure column caps being vertically arranged of hoistable platform bottom, own
Admission line and all closure column caps are interspersed in matrix, and solenoid valve, Suo You electricity are mounted at the top of each admission line
Magnet valve is communicated with gas pipeline, and the gas pipeline is communicated with air pump.
Preferably, all admission line bottom ends are mounted on rubber ring, and the bottom end for blocking column cap is equipped with rubber
Rubber head, the both ends of the hoistable platform are mounted on plug at end part cylinder, and the output shaft of two plug at end part cylinders is horizontal
And it is opposite, the output shaft axis of the plug at end part cylinder is parallel with the conveying direction of power transmission track.
Preferably, one end of the power transmission track is provided with limiting cylinder, the output end installation of the limiting cylinder
There is limit plate, the output shaft horizontal vertical of the limiting cylinder is in the conveying direction of power transmission track, the limit plate
Place plane it is vertical with the conveying direction of power transmission track.
Preferably, the power transmission rail base is provided with the second lifting hydraulic cylinder for driving itself to go up and down, institute
Stating power transmission track includes horizontally disposed U-shaped supporting plate and several horizontally arranged drivings being mounted on supporting plate
Roller, the end of all driven rollers are mounted on several gears, and all gears are cooperated by several crawler haulages, one of them
One end of driven roller is equipped with driving motor.
Preferably, the closure cylinder is by L shape support plate face power transmission track, and L shape support plate is towards power transmission
Track inclination.
Preferably, the hoistable platform is solid by the output shaft of downward opening U-shaped connecting plate and the first lifting hydraulic cylinder
Fixed connection, first lifting hydraulic cylinder are erected at the surface of power transmission track by support frame, the U-shaped connecting plate
Top vertical is provided with the guide rod with the cooperation of support frame top slide.
Preferably, the bottom of the supporting plate is provided with the vertical bar being distributed in matrix, and the underface of supporting plate, which is arranged, to be used
In all workbench for blocking cylinder of support, all vertical bars are slidably matched with workbench.
The present invention provides a kind of engine cylinder cover oil duct leakage testing device herein and has compared with prior art by improving
Following improvement and advantage:
1, power transmission track is inserted on the conveyer belt of production line, without conveying cylinder cap to specified leak test station
On, detection is completed to continue to convey, and improves the transfer efficiency of cylinder cap.
2, specific aim closure can be carried out for the port of each oil duct by sealing device and closure column cap, improves and blocks
Efficiency improves oil duct leak test detection efficiency, reduces engine factory rate.
Detailed description of the invention
The present invention is further explained with reference to the accompanying drawings and examples:
Fig. 1 is schematic perspective view one of the invention；
Fig. 2 is schematic perspective view two of the invention；
Fig. 3 is schematic perspective view three of the invention；
Fig. 4 is the schematic perspective view one of inlet duct of the present invention；
Fig. 5 is the schematic perspective view two of inlet duct of the present invention；
Fig. 6 is the schematic perspective view one of sealing device of the present invention；
Fig. 7 is the schematic perspective view two of sealing device of the present invention；
Fig. 8 is the schematic perspective view of power transmission track of the present invention；
Fig. 9 is system block diagram of the invention；
Description of symbols:
Power transmission track 1, driven roller 11, gear 12, crawler belt 13, driving motor 14, limiting cylinder 15 limit plate
16, supporting plate 17, the second lifting hydraulic cylinder 18, vertical bar 19, sealing device 2, closure cylinder 21, block head 22, the first lifting
Hydraulic cylinder 23, hoistable platform 24, plug at end part cylinder 25, guide rod 26, sealing ring 27, pressure sensor 28, photoelectric sensor
29, inlet duct 3, admission line 31 blocks column cap 32, solenoid valve 33, rubber ring 34, Rubber end 35, gas pipeline 36, support
Frame 4, workbench 5, U-shaped connecting plate 6.
Specific embodiment
The present invention is described in detail below, and technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention provides a kind of engine cylinder cover oil duct leakage testing device, as shown in figs. 1-9, Yi Zhongfa by improving herein
Motivation oil cylinder head way leakage testing device, the oil duct leakage testing device include power transmission track 1, for blocking cylinder cap surrounding oilhole
Sealing device 2 and the inlet duct 3 that is arranged in right above power transmission track 1, the sealing device 2 be placed in power transmission
1 side of track, the sealing device 2 include several spaced closure of conveying direction along power transmission track 1
Cylinder 21 is provided with on-off solenoid valve 33 in all air inlet pipe for blocking cylinders 21, blocks all closure cylinders of cylinder 21
21 output end is equipped with block head 22, and the inlet duct 3 includes gas handling system and for driving gas handling system to go up and down
First lifting hydraulic cylinder 23 is provided with the first hydraulic buttery valve 33 on first lifting hydraulic cylinder 23, and the gas handling system includes
Hoistable platform 24, several be vertically installed at the admission line 31 and several closure columns being vertically arranged of 24 bottom of hoistable platform
First 32, all admission lines 31 and all closure column caps 32 are interspersed in matrix, and the top of each admission line 31 is respectively mounted
There is solenoid valve 33, all solenoid valves 33 are communicated with gas pipeline 36, and the gas pipeline 36 is communicated with air pump, the cylinder reversely put
Lid is transported on power transmission track 1 from the conveyer belt of production line, and one end of power transmission track 1 is provided with photoelectric sensor
29, photoelectric sensor 29 is electrically connected with controller, when photoelectric sensor 29 detects cylinder cap, generates high level signal
And sending high level signal to controller, controller handles the high level signal transmitted, then controller output letter
It number is first conveyed to the first hydraulic buttery valve 33, the first hydraulic buttery valve 33 is opened, and the first lifting hydraulic cylinder 23 drives sealing device 2
Decline, when the output shaft Overstroke of the first lifting hydraulic cylinder 23, sealing device 2 will be sealed at the top of cylinder cap, then control
Device output signal processed is first conveyed to on-off solenoid valve 33, and on-off solenoid valve 33 is opened, and all closure cylinders 21 drive all closure
First 22 holes for being adjacent to the side of cylinder cap are blocked, and then controller exports high level signal to solenoid valve 33, and solenoid valve 33 is beaten
It opens, starts to supply gas to the oil duct in cylinder cap, be provided with pressure sensor wherein being located at cylinder body oilhole in several block heads 22
28, when pressure sensor 28 detects that the pressure in cylinder cap reaches preset value, a high level signal is transmitted to controller, control
Device exports low level signal to air pump and the first lifting hydraulic cylinder 23 respectively, and air pump drives all closure cylinders 21 to reset, and first
The output shaft of lifting hydraulic cylinder 23 retracts.
All 31 bottom ends of the admission line are mounted on rubber ring 34, and the bottom end for blocking column cap 32 is equipped with rubber
First 35, the both ends of the hoistable platform 24 are mounted on plug at end part cylinder 25, the output of two plug at end part cylinders 25
Axis is horizontal and opposite, and the output shaft axis of the plug at end part cylinder 25 is parallel with the conveying direction of power transmission track 1, when the
One lifting hydraulic cylinder 23 drives hoistable platform 24 to decline, the bottom end of all air inlet pipe and the lower general who has surrendered's cylinder cap top of all closure column caps 32
All oilholes in portion are blocked, and then for controller output signal to cylinder 21 is blocked, the output shaft stretching for blocking cylinder 21 will
The end of cylinder cap is blocked.
One end of the power transmission track 1 is provided with limiting cylinder 15, and the output end of the limiting cylinder 15 is equipped with
Plate 16 is limited, for the output shaft horizontal vertical of the limiting cylinder 15 in the conveying direction of power transmission track 1, the limit is flat
The place plane of plate 16 is vertical with the conveying direction of power transmission track 1, when photoelectric sensor 29 detects cylinder cap, produces
Raw high level signal simultaneously sends high level signal to controller, and controller handles the high level signal transmitted, then
While controller output signal is conveyed to the first hydraulic buttery valve 33, it is conveyed to limiting cylinder 15, limiting cylinder 15 pushes limit
Position plate 16 stretches out, and cylinder cap is avoided to continue to move to.
1 bottom of power transmission track is provided with the second lifting hydraulic cylinder 18 for driving itself to go up and down, described dynamic
Power delivery track 1 includes horizontally disposed U-shaped supporting plate 17 and several horizontally arranged drivings being mounted on supporting plate 17
Roller 11, the end of all driven rollers 11 are mounted on several gears 12, and all gears 12 are matched by the transmission of several crawler belts 13
It closes, one end of one of driven roller 11 is equipped with driving motor 14, and driving motor 14 drives one of driven roller 11 to rotate,
Gear 12 in the driven roller 11 rotates, and is driven by all crawler belts 13, and all driven rollers 11 is driven to rotate synchronously, so as to
It realizes that cylinder cap is mobile, when photoelectric sensor 29 detects cylinder cap, generates high level signal and transmit high level signal
To controller, controller handles the high level signal transmitted, and then controller output signal is conveyed to the first hydraulic electricity
Before magnet valve 33, the second hydraulic buttery valve 33 is installed on second lifting hydraulic cylinder 18, then controller exports high level signal
To the second hydraulic buttery valve 33, the second hydraulic buttery valve 33 is opened, and the second lifting hydraulic cylinder 18 drives supporting plate 17 to decline, so that
Cylinder cap and block head 22 align.
The closure cylinder 21 is by L shape support plate face power transmission track 1, and L shape support plate is towards power transmission track 1
Inclination, the L shape support plate tilt angle is identical as the side tilt angle of cylinder cap, improves the leakproofness of block head 22.
The hoistable platform 24 is fixed by the output shaft of downward opening U-shaped connecting plate 6 and the first lifting hydraulic cylinder 23
Connection, first lifting hydraulic cylinder 23 are erected at the surface of power transmission track 1, the U-shaped connecting plate by support frame 4
6 top vertical is provided with the guide rod 26 with the cooperation of 4 top slide of support frame, and guide rod 26 can guarantee that hoistable platform 24 is flat
Steady lifting.
The bottom of the supporting plate 17 is provided with the vertical bar 19 being distributed in matrix, and the underface setting of supporting plate 17 is used for
All workbench 5 for blocking cylinder 21 of support, all vertical bars 19 are slidably matched with workbench 5, and vertical bar 19 guarantees support
Plate 17 keeps horizontal in lifting.
Working principle: when photoelectric sensor 29 detects cylinder cap, high level signal is generated and by high level signal
Send controller to, controller handles the high level signal transmitted, and then controller output signal is conveyed to the second liquid
Pressure electromagnetic valve 33 is equipped with the second hydraulic buttery valve 33 on second lifting hydraulic cylinder 18, and then controller exports high level signal
To the second hydraulic buttery valve 33, the second hydraulic buttery valve 33 is opened, and the second lifting hydraulic cylinder 18 drives supporting plate 17 to decline, so that
Cylinder cap and block head 22 align, and then controller will be to treated high level signal, then is conveyed to the first hydraulic buttery valve 33,
First hydraulic buttery valve 33 is opened, and the first lifting hydraulic cylinder 23 drives sealing device 2 to decline, defeated when the first lifting hydraulic cylinder 23
Shaft Overstroke, sealing device 2 and the cooperation of plug at end part cylinder 25 will be sealed at the top of cylinder cap, and then controller exports
Signal is conveyed to on-off solenoid valve 33, and on-off solenoid valve 33 is opened, and all closure cylinders 21 drive all block heads 22 to be adjacent to cylinder
The hole of the side of lid is blocked, and then controller exports high level signal to solenoid valve 33, and solenoid valve 33 is opened, started to cylinder
Oil duct in lid is supplied gas, and when pressure sensor 28 detects that the pressure in cylinder cap reaches preset value, transmits a high level signal
To controller, controller exports low level signal to air pump and the first lifting hydraulic cylinder 23 respectively, and air pump drives all closure gas
Cylinder 21 resets, and the output shaft of the first lifting hydraulic cylinder 23 retracts, the type of the photoelectric sensor 29, proximity sensor and controller
Number be the prior art, and will not be described here in detail.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of engine cylinder cover oil duct leakage testing device, it is characterised in that: the oil duct leakage testing device includes power transmission rail
Road (1), the sealing device (2) for blocking cylinder cap surrounding oilhole and the air inlet dress being arranged right above power transmission track (1)
It sets (3), the sealing device (2) is placed in power transmission track (1) side, and the sealing device (2) includes several edges
The spaced closure cylinder (21) of conveying direction of power transmission track (1), it is all it is described block cylinder (21) outputs
End be equipped with block head (22), the inlet duct (3) include gas handling system and for drive gas handling system go up and down first
Lifting hydraulic cylinder (23), the gas handling system include hoistable platform (24), several be vertically installed at hoistable platform (24) bottom
The admission line (31) in portion and several closure column caps (32) being vertically arranged, all admission lines (31) and all closure column caps
(32) it is interspersed in matrix, is mounted on solenoid valve (33) at the top of each admission line (31), all solenoid valves (33) are even
It is connected with gas pipeline (36), the gas pipeline (36) is communicated with air pump.
2. a kind of engine cylinder cover oil duct leakage testing device according to claim 1, it is characterised in that: all air inlet pipe
Road (31) bottom end is mounted on rubber ring (34), and the bottom end for blocking column cap (32) is equipped with Rubber end (35), the lifting
The both ends of platform (24) are mounted on plug at end part cylinder (25), the output shaft of two plug at end part cylinders (25) it is horizontal and
Relatively, the output shaft axis of the plug at end part cylinder (25) is parallel with the conveying direction of power transmission track (1).
3. a kind of engine cylinder cover oil duct leakage testing device according to claim 1, it is characterised in that: the power transmission rail
The one end in road (1) is provided with limiting cylinder (15), and the output end of the limiting cylinder (15) is equipped with limit plate (16), described
The output shaft horizontal vertical of limiting cylinder (15) is in the conveying direction of power transmission track (1), the institute of limit plate (16)
It is vertical with the conveying direction of power transmission track (1) in plane.
4. a kind of engine cylinder cover oil duct leakage testing device according to claim 1, it is characterised in that: the power transmission rail
Road (1) bottom is provided with the second lifting hydraulic cylinder (18) for driving itself to go up and down, and the power transmission track (1) includes
Horizontally disposed U-shaped supporting plate (17) and several horizontally arranged driven rollers (11) being mounted on supporting plate (17), all drives
The end of dynamic roller (11) is mounted on several gears (12), and all gears (12) are cooperated by the transmission of several crawler belts (13),
One end of one of driven roller (11) is equipped with driving motor (14).
5. a kind of engine cylinder cover oil duct leakage testing device according to claim 1, it is characterised in that: the closure cylinder
(21) by L shape support plate face power transmission track (1), L shape support plate is tilted towards power transmission track (1).
6. a kind of engine cylinder cover oil duct leakage testing device according to claim 1, it is characterised in that: the hoistable platform
(24) it is fixedly connected by downward opening U-shaped connecting plate (6) with the output shaft of the first lifting hydraulic cylinder (23), described first liter
Descending liquid cylinder pressure (23) is erected at the surface of power transmission track (1), the top of the U-shaped connecting plate (6) by support frame (4)
It is vertically arranged with the guide rod (26) with the cooperation of support frame (4) top slide.
7. a kind of engine cylinder cover oil duct leakage testing device according to claim 4, it is characterised in that: the supporting plate (17)
Bottom be provided in matrix be distributed vertical bar (19), supporting plate (17) underface setting be used for all closure cylinders of support
(21) workbench (5), all vertical bars (19) are slidably matched with workbench (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415502.3A CN110095230A (en) | 2019-05-18 | 2019-05-18 | A kind of engine cylinder cover oil duct leakage testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415502.3A CN110095230A (en) | 2019-05-18 | 2019-05-18 | A kind of engine cylinder cover oil duct leakage testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110095230A true CN110095230A (en) | 2019-08-06 |
Family
ID=67448560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910415502.3A Pending CN110095230A (en) | 2019-05-18 | 2019-05-18 | A kind of engine cylinder cover oil duct leakage testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110095230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649164A (en) * | 2020-12-30 | 2021-04-13 | 丁继华 | Intelligent detection device is prevented leaking by valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272911A (en) * | 1992-10-26 | 1993-12-28 | Litton Industrial Automation Systems, Inc. | Cylinder head flow test apparatus and method |
| CN103954407A (en) * | 2014-04-22 | 2014-07-30 | 河北工业大学 | Engine cylinder cover oil channel leakage testing device |
| CN205079909U (en) * | 2015-08-18 | 2016-03-09 | 黄岩院桥新兴机械配件厂（普通合伙） | Atmospheric pressure of engine cylinder lid detects machine |
| CN108918032A (en) * | 2018-05-15 | 2018-11-30 | 哈尔滨工业大学 | Air tightness detecting device of engine cylinder head |
| CN109556792A (en) * | 2018-11-06 | 2019-04-02 | 重庆福伦德实业有限公司 | The final leakage tester of engine cylinder body |
| CN208721349U (en) * | 2018-08-31 | 2019-04-09 | 芜湖科翔动力机械有限公司 | Engine cylinder cover valve leakage testing device |
| CN109738126A (en) * | 2019-02-28 | 2019-05-10 | 重庆飞康机械有限公司 | A kind of novel cylinder hood air tightness detection equipment |
| CN209979142U (en) * | 2019-05-18 | 2020-01-21 | 玉柴联合动力股份有限公司 | Engine cylinder lid oil duct leakage test device |
-
2019
- 2019-05-18 CN CN201910415502.3A patent/CN110095230A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272911A (en) * | 1992-10-26 | 1993-12-28 | Litton Industrial Automation Systems, Inc. | Cylinder head flow test apparatus and method |
| CN103954407A (en) * | 2014-04-22 | 2014-07-30 | 河北工业大学 | Engine cylinder cover oil channel leakage testing device |
| CN205079909U (en) * | 2015-08-18 | 2016-03-09 | 黄岩院桥新兴机械配件厂（普通合伙） | Atmospheric pressure of engine cylinder lid detects machine |
| CN108918032A (en) * | 2018-05-15 | 2018-11-30 | 哈尔滨工业大学 | Air tightness detecting device of engine cylinder head |
| CN208721349U (en) * | 2018-08-31 | 2019-04-09 | 芜湖科翔动力机械有限公司 | Engine cylinder cover valve leakage testing device |
| CN109556792A (en) * | 2018-11-06 | 2019-04-02 | 重庆福伦德实业有限公司 | The final leakage tester of engine cylinder body |
| CN109738126A (en) * | 2019-02-28 | 2019-05-10 | 重庆飞康机械有限公司 | A kind of novel cylinder hood air tightness detection equipment |
| CN209979142U (en) * | 2019-05-18 | 2020-01-21 | 玉柴联合动力股份有限公司 | Engine cylinder lid oil duct leakage test device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649164A (en) * | 2020-12-30 | 2021-04-13 | 丁继华 | Intelligent detection device is prevented leaking by valve |
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