CN110044551B - Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump - Google Patents
Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump Download PDFInfo
- Publication number
- CN110044551B CN110044551B CN201910417407.7A CN201910417407A CN110044551B CN 110044551 B CN110044551 B CN 110044551B CN 201910417407 A CN201910417407 A CN 201910417407A CN 110044551 B CN110044551 B CN 110044551B
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- helium
- cavity
- pump body
- hole
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 239000000446 fuel Substances 0.000 title claims abstract description 12
- 238000002347 injection Methods 0.000 title claims abstract description 12
- 239000007924 injection Substances 0.000 title claims abstract description 12
- 239000001307 helium Substances 0.000 claims abstract description 75
- 229910052734 helium Inorganic materials 0.000 claims abstract description 75
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000007789 sealing Methods 0.000 claims abstract description 71
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000005086 pumping Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 210000001364 upper extremity Anatomy 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a gas tightness detection device for a connecting surface of a pump body shaft hole and a bushing of a fuel injection pump, which comprises a closed cavity, wherein a first sealing ring and a second sealing ring are arranged on the inner wall of a plane of the cavity, the first sealing ring, the second sealing ring, the cavity wall, the pump body and the bushing jointly enclose a closed helium filling space, a helium hole is formed in the cavity wall between the first sealing ring and the second sealing ring and is communicated with a helium supply device through a helium pipe, a nitrogen hole, a vacuumizing hole and a detection hole are formed in the cavity wall at the periphery of the second sealing ring and are communicated with the nitrogen supply device through a nitrogen pipe, the vacuumizing hole is communicated with the vacuumizing device through a vacuumizing pipe, and the detection hole is communicated with the helium detection device through a detection pipe. Helium is filled into the helium filling space, and then a helium detection device is used for detecting whether helium is contained in the gas in the cavity outside the helium filling space so as to judge whether the connecting surface between the bushing and the pump body shaft hole has a gas leakage phenomenon.
Description
Technical field:
the invention relates to an air tightness detection device, in particular to an air tightness detection device applied to detection of a connecting surface of a pump body shaft hole and a bushing of a fuel injection pump.
The background technology is as follows:
the fuel injection pump body is internally provided with a plurality of oil ways and a shaft hole, the outer end of the shaft hole is inserted with a bushing, the bushing is tightly matched with the shaft hole, and the pump body is filled with fuel oil, so that no air leakage phenomenon exists between the outer wall of the bushing and the inner wall of the shaft hole, the air tightness of the connecting surface of the shaft hole of the fuel injection pump body and the bushing is detected, and no corresponding device is used for realizing the detection at present.
The invention comprises the following steps:
the technical problems to be solved by the invention are as follows: a device for detecting the air tightness of the joint surface of the pump body shaft hole and the bushing of a fuel injection pump is provided.
In order to solve the technical problems, the invention adopts the following technical scheme: the device is characterized by comprising a closed cavity capable of being opened and closed, a first sealing ring matched with the end face of the exposed end of the bushing and a second sealing ring positioned on the periphery of the first sealing ring are arranged on the inner wall of a plane of the cavity, the second sealing ring corresponds to the end face of the pump body on the periphery of the exposed end of the bushing, a pressing device for applying pressure to the pump body is arranged in the cavity, the end face of the exposed end of the bushing is enabled to be in sealing butt joint with the first sealing ring, meanwhile, the end face of the pump body on the periphery of the exposed end of the bushing is enabled to be in butt joint with the second sealing ring, a closed helium filling space is formed by the first sealing ring, the second sealing ring, the cavity wall, the pump body and the bushing in a surrounding mode, a plurality of communication cavity outside and helium filling space helium holes are formed in the cavity wall between the first sealing ring and the second sealing ring, the helium holes are communicated with a helium supply device through helium pipe, a plurality of nitrogen holes, a plurality of vacuum pumping holes and a detection hole are formed in the cavity wall on the periphery of the second sealing ring, the cavity is connected with the vacuum pumping device through the nitrogen holes and the vacuum pumping device, and the detection cavity is communicated with the outside through the vacuum pumping device and the detection device.
As a preferred scheme, the cavity includes bottom plate, fixed connection annular coaming down at the bottom plate up end, detachably sealing connection top cap on coaming upper end down, and the top cap lower limb is relative with the upper limb of coaming down, the top cap top is fixed to be provided with sharp drive arrangement, and sharp drive arrangement is connected and drive the top cap reciprocates in order to open or close the cavity with the top cap, is provided with the kicking block on the top surface in the top cap, and the kicking block is used for the tight pump body of top, first sealing washer, the equal fixed connection of second sealing washer are on the bottom plate, nitrogen gas hole, evacuation hole and detection hole are all seted up on the coaming down.
As a preferable scheme, two positioning columns are arranged between the second sealing ring and the lower coaming on the bottom plate, and the two positioning columns are in one-to-one correspondence with the two positioning holes of the pump body.
As a preferable scheme, the helium pipe, the nitrogen pipe, the vacuumizing pipe and the detecting pipe are respectively provided with a stop valve.
The beneficial effects of the invention are as follows: according to the invention, the annular connecting surface between the bushing and the pump body shaft hole is positioned at the inner side and the outer side of the outer end of the pump body and is respectively in sealing butt joint with the cavity wall by adopting the first sealing ring and the second sealing ring, the first sealing ring, the second sealing ring, the cavity wall of the cavity body and the end surfaces of the pump body and the bushing form a sealed helium filling space, helium is filled into the helium filling space, and then a helium detection device is used for detecting whether helium is contained in the gas in the cavity body outside the second sealing ring so as to judge whether the annular connecting surface between the bushing and the pump body shaft hole has a gas leakage phenomenon or not.
Description of the drawings:
the invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1;
fig. 3 is an enlarged view of a portion B in fig. 2.
Fig. 1 to 3 show: 1. the device comprises a cavity, 101, a bottom plate, 102, a lower coaming, 103, a top cover, 104, a top block, 2, a bushing, 3, a first sealing ring, 4, a second sealing ring, 5, a pump body, 501, a positioning hole, 6, a compressing device, 7, a helium hole, 8, a helium pipe, 9, a helium gas supply device, 10, a nitrogen hole, 11, a vacuumizing hole, 12, a detection hole, 13, a nitrogen pipe, 14, a nitrogen gas supply device, 15, a vacuumizing pipe, 16, a vacuumizing device, 17, a detection pipe, 18, a helium gas detection device, 19, a linear driving device, 20, a positioning column, 21, a stop valve, 22, a bracket, 23, a supporting frame, 24, a groove, 25, a third sealing ring, 26 and a helium filling space.
The specific embodiment is as follows:
specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-3, the gas tightness detection device for the joint surface of the pump body shaft hole and the bushing of the fuel injection pump comprises an openable closed cavity 1, a first sealing ring 3 matched with the end surface of the exposed end of the bushing 2 and a second sealing ring 4 positioned at the periphery of the first sealing ring 3 are arranged on the inner plane wall of the cavity 1, the second sealing ring 4 corresponds to the end surface of the pump body 5 at the exposed end of the bushing 2, a compressing device 6 for applying pressure to the pump body 5 is arranged in the cavity 1, the end surface of the exposed end of the bushing 2 is in sealing contact with the first sealing ring 3, the end surface of the pump body 5 at the exposed end of the bushing 2 is in contact with the second sealing ring 4, the first sealing ring 3, the second sealing ring 4, the cavity wall, the other end of the cavity 5, the other end of the cavity 2, the other end of the second sealing ring, the second sealing ring 4, the cavity 2 and the first sealing ring are positioned in the helium filling space 26, a vacuum pumping pipe 7 is arranged on the cavity wall, a vacuum pumping hole 10, a nitrogen gas pipe 10 is connected with the vacuum pipe 11 through the vacuum pumping hole 10 and a vacuum pipe 11, a nitrogen gas pipe 10 is connected with the vacuum pipe 11 through the vacuum pipe 11, and a nitrogen gas hole 10 is connected with the vacuum pipe 11 through the vacuum pipe 10 and a vacuum pipe 11, the cavity 1 is also communicated with a helium gas detection device 18 outside the cavity 1 through a detection hole 12 and a detection pipe 17 connected to the detection hole 12.
In this embodiment, the helium supply device 9 is a high-pressure helium bottle, the nitrogen supply device 14 is a high-pressure nitrogen bottle, the vacuum pumping device 16 is a vacuum pump, and the helium detection device 18 is a conventional helium detector.
As shown in fig. 2, the cavity 1 includes a bottom plate 101 fixedly connected to the support 22, an annular lower enclosing plate 102 fixedly connected to an upper end surface of the bottom plate 101, and a top cover 103 detachably connected to an upper end of the lower enclosing plate 102 in a sealing manner, wherein a lower edge of the top cover 103 is opposite to an upper edge of the lower enclosing plate 102, a linear driving device 19 is fixedly arranged above the top cover 103, the linear driving device 19 is fixedly connected above the top cover 103 through a support frame 23, the linear driving device 19 is connected with the top cover 103 and drives the top cover 103 to move up and down to open or close the cavity 1, in this embodiment, a hydraulic push rod is adopted as the linear driving device, and a lower end of a piston rod of the hydraulic push rod is fixedly connected with the top cover 103.
As shown in fig. 2, a top block 104 is disposed on the inner top surface of the top cover 103, the top block 104 is used as a compressing device 6 for pushing the pump body 5, the first sealing ring 3 and the second sealing ring 4 are fixedly embedded on the bottom plate 101, and the nitrogen hole 10, the vacuumizing hole 11 and the detecting hole 12 are all opened on the lower coaming 102.
As shown in fig. 3, since the lower end of the liner 2 extends out of the shaft hole, a groove 24 is provided on the bottom plate 101 to ensure that the liner 2 and the end face of the pump body 5 at the periphery of the liner 2 can simultaneously be in sealing abutment with the first seal ring 3 and the second seal ring 4.
As shown in fig. 3, when the liner 2 and the end face of the pump body 5 on the periphery of the liner 2 are simultaneously in sealing contact with the first seal ring 3 and the second seal ring 4, both the first seal ring 3 and the second seal ring 4 are partially exposed to the outside of the bottom plate 101, and when the exposed end face of the liner 2 and the end face of the pump body 5 on the periphery of the liner 2 are respectively in contact with the first seal ring 3 and the second seal ring 4, gaps exist between the bottom plate 101 between the first seal ring 3 and the second seal ring 4 and the lower end face of the pump body 5 and between the exposed end face of the liner 2, thereby forming a helium filling space 26, the helium hole 7 is communicated with the helium filling space 26, and helium can be filled into the helium filling space 26 through the helium gas supply device 9.
As shown in fig. 2, two positioning columns 20 are disposed between the second sealing ring 4 and the lower coaming 102 on the bottom plate 101, and the two positioning columns 20 are in one-to-one correspondence with two positioning holes 501 of the pump body 5 and are used for positioning the pump body 5, so as to ensure that the first sealing ring 3 can be abutted with the end face of the bushing 2.
The helium pipe 8, the nitrogen pipe 13, the vacuumizing pipe 15 and the detecting pipe 17 are respectively provided with a stop valve 21, and the stop valves 21 can be opened or closed according to the requirement.
The working process of the invention is as follows: when the air tightness detection is carried out on the shaft hole of one pump body 5 and the connecting surface of the bush as shown in fig. 1 to 3, firstly, the pump body 5 is installed on the bottom plate 101, two positioning holes 501 of the pump body 5 are correspondingly sleeved on two positioning posts 20, so that the installation of the position of the pump body 5 is accurate, the annular lower end surface of the bush 2 corresponds to the first sealing ring 3, the end surface of the pump body 5 at the periphery of the bush 2 corresponds to the second sealing ring 4, then the linear driving device 19 is started, the top cover 103 is driven by the linear driving device 19 to move downwards until the top cover 103 is in sealing connection with the upper end of the lower coaming 102, and a third sealing ring is arranged between the top cover 103 and the lower coaming 102 to realize sealing butt joint so as to isolate the cavity from the outside as shown in fig. 2.
Then the vacuumizing device 16 is started, the vacuumizing device 16 pumps the air except for the helium filling space 26 in the cavity 1 completely, meanwhile, the detecting tube 17 and the air in the nitrogen tube 13 are pumped completely, then nitrogen is filled in the cavity 1 at a certain speed by utilizing the nitrogen supplying device 14, the nitrogen is filled in the cavity 1 except for the helium filling space 26, meanwhile, the helium detecting device 18 is started, the helium detecting device 18 pumps the air in the cavity 1 except for the helium filling space 26 into the helium detecting device 18 at the same speed, after the helium detecting device 18 cannot detect helium, the nitrogen supplying device 14 and the helium detecting device 18 are stopped, the helium supplying device 9 is started, the helium filling space 26 is filled with helium, the air pressure of the helium filling space 26 is larger than the air pressure in the cavity 1 except for the helium filling space 26, after a certain time, the helium detecting device 18 is started again, the air in the cavity 1 except for the helium filling space 26 is detected, if the helium is detected, the fact that the connecting surface between the shaft hole 5 and the shaft hole 2 exists is detected, and conversely, the connecting surface between the shaft hole and the pump body is well sealed, and the shaft hole is well described.
When the helium gas detection device 18 detects the gas inside the cavity 1 outside the helium filling space 26, the nitrogen gas supply device 14 can be simultaneously opened to increase the gas pressure inside the cavity 1 outside the helium filling space 26, so that the helium gas detection device 18 can easily extract a gas sample.
The stop valve 21 on the nitrogen gas pipe 13 is cut off while stopping the nitrogen gas supply device 14, the stop valve 21 on the helium gas pipe 8 is cut off while stopping the helium gas supply device 9, the stop valve 21 on the evacuation pipe is cut off while stopping the vacuum pumping device 16, and the stop valve 21 on the detection pipe 17 is cut off while stopping the helium gas detection device 18, so that no distortion of the detection result caused by backflow of external air into the cavity 1 can be ensured, and in general, the nitrogen gas supply device 14, the helium gas supply device 9, the vacuum pumping device 16 and the detection device 18 have a non-return effect themselves, so the stop valve 21 serves as an auxiliary component to provide guarantee for the detection accuracy.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some of the applied embodiments, and are not intended to limit the invention; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (4)
1. The gas tightness detection device for the connection surface of the pump body shaft hole and the bushing of the fuel injection pump is characterized by comprising a closed cavity (1) capable of being opened and closed, wherein a first sealing ring (3) matched with the end surface of the exposed end of the bushing (2) and a second sealing ring (4) positioned on the periphery of the first sealing ring (3) are arranged on the plane inner wall of the cavity (1), the second sealing ring (4) corresponds to the end surface of the pump body (5) on the periphery of the exposed end of the bushing (2), a pressing device (6) for applying pressure to the pump body (5) is arranged in the cavity (1), the pressing device (6) enables the end surface of the exposed end of the bushing (2) to be in sealing butt with the first sealing ring (3), the end surface of the pump body (5) on the periphery of the exposed end of the bushing (2) is in butt joint with the second sealing ring (4), a closed helium filling space (26) is jointly enclosed by the first sealing ring (3), a plurality of cavity (1) and a plurality of helium filling spaces (26) are formed in the cavity wall between the first sealing ring (3) and the second sealing ring (4), and a plurality of helium filling holes (7) are formed in the cavity wall between the first sealing ring (3) and the second sealing ring (4), and the helium filling holes (7) are communicated with the helium holes (7) through the helium filling holes (7) and the helium holes (10), and the helium filling holes (10 are formed in the outer walls of the device The vacuum-pumping device comprises a plurality of vacuum-pumping holes (11) and a detection hole (12), wherein the cavity (1) is communicated with a nitrogen supply device (14) outside the cavity through a nitrogen hole (10) and a nitrogen pipe (13) connected to the nitrogen hole (10), the cavity (1) is communicated with a vacuum-pumping device (16) outside the cavity (1) through the vacuum-pumping holes (11) and a vacuum-pumping pipe (15) connected to the vacuum-pumping holes (11), and the cavity (1) is also communicated with a helium detection device (18) outside the cavity (1) through the detection hole (12) and a detection pipe (17) connected to the detection hole (12).
2. The gas tightness detection device for the pump body shaft hole and the bushing connection surface of the fuel injection pump according to claim 1, wherein the cavity (1) comprises a bottom plate (101), an annular lower coaming (102) fixedly connected to the upper end surface of the bottom plate (101), a top cover (103) detachably and hermetically connected to the upper end of the lower coaming (102), a linear driving device (19) is fixedly arranged above the top cover (103), the linear driving device (19) is connected with the top cover (103) and drives the top cover (103) to move up and down to open or close the cavity (1), a top block (104) is arranged on the inner top surface of the top cover (103), the top block (104) is used for propping up the pump body (5), the first sealing ring (3), the second sealing ring (4) are fixedly connected to the bottom plate (101), and the nitrogen hole (10), the vacuumizing hole (11) and the detection hole (12) are formed in the lower coaming (102).
3. The device for detecting the air tightness of the joint surface of the pump body shaft hole and the bush of the fuel injection pump according to claim 2, wherein two positioning columns (20) are arranged between the second sealing ring (4) and the lower coaming (102) on the bottom plate (101), and the two positioning columns (20) are in one-to-one correspondence with the two positioning holes (501) of the pump body (5).
4. The device for detecting the air tightness of the joint surface of the pump body shaft hole and the bushing of the fuel injection pump according to claim 1, wherein the helium pipe (8), the nitrogen pipe (13), the vacuumizing pipe (15) and the detecting pipe (17) are respectively provided with a stop valve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417407.7A CN110044551B (en) | 2019-05-20 | 2019-05-20 | Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417407.7A CN110044551B (en) | 2019-05-20 | 2019-05-20 | Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110044551A CN110044551A (en) | 2019-07-23 |
| CN110044551B true CN110044551B (en) | 2024-03-08 |
Family
ID=67282611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910417407.7A Active CN110044551B (en) | 2019-05-20 | 2019-05-20 | Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110044551B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325861A (en) * | 2021-11-16 | 2022-04-12 | 东科克诺尔商用车制动技术有限公司 | Method and device for detecting mistaken and neglected installation of air compressor cylinder body bushing based on vacuum degree |
| CN118565737A (en) * | 2024-06-19 | 2024-08-30 | 南通迈迪检测仪器有限公司 | Pump body air tightness detection device of fuel injection pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06347362A (en) * | 1993-06-11 | 1994-12-22 | Ikuno Seisakusho:Kk | Method and apparatus for airtightness inspection |
| CN105890849A (en) * | 2016-06-28 | 2016-08-24 | 襄阳富临精工机械有限责任公司 | Cavity product airtightness detection table and detection method |
| CN207437426U (en) * | 2017-11-13 | 2018-06-01 | 重庆水泵厂有限责任公司 | A kind of seal structure for centrifugal pump |
| CN207636256U (en) * | 2017-12-13 | 2018-07-20 | 湖南阿提斯智能装备有限公司 | A kind of air-tightness detection device of battery cap plate |
| CN209673307U (en) * | 2019-05-20 | 2019-11-22 | 无锡富泰盛精模科技有限公司 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3861835B2 (en) * | 2003-03-31 | 2006-12-27 | 株式会社デンソー | Fuel injection pump |
-
2019
- 2019-05-20 CN CN201910417407.7A patent/CN110044551B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06347362A (en) * | 1993-06-11 | 1994-12-22 | Ikuno Seisakusho:Kk | Method and apparatus for airtightness inspection |
| CN105890849A (en) * | 2016-06-28 | 2016-08-24 | 襄阳富临精工机械有限责任公司 | Cavity product airtightness detection table and detection method |
| CN207437426U (en) * | 2017-11-13 | 2018-06-01 | 重庆水泵厂有限责任公司 | A kind of seal structure for centrifugal pump |
| CN207636256U (en) * | 2017-12-13 | 2018-07-20 | 湖南阿提斯智能装备有限公司 | A kind of air-tightness detection device of battery cap plate |
| CN209673307U (en) * | 2019-05-20 | 2019-11-22 | 无锡富泰盛精模科技有限公司 | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110044551A (en) | 2019-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110044551B (en) | Gas tightness detection device for joint surface of pump body shaft hole and bush of fuel injection pump | |
| CN108871695B (en) | Leakage detection device used before lithium battery liquid injection | |
| CN106654142A (en) | Liquid injection device | |
| CN111551323B (en) | Tightness detection device and method for hydraulic torque converter | |
| CN217930746U (en) | Gas storage jar leak hunting device | |
| CN209673307U (en) | Fuel injection pump pump housing axis hole and bushing joint face air-tightness detection device | |
| CN201772979U (en) | Horizontal type valve test equipment | |
| CN108019346A (en) | A kind of hydraulic end of plunger pump structure with multi-sealed effect | |
| CN104912509B (en) | A kind of fast handling oblique multistage sealed stuffing device of adjustable offset | |
| CN203534780U (en) | Tank online inflation detection and gas recovery system | |
| CN2539021Y (en) | Leakage-preventing flange sealer | |
| CN108899249B (en) | Relay, relay vacuumizing and inflating system and relay vacuumizing and inflating method | |
| CN106505020B (en) | Vacuum packaging equipment | |
| CN107905976B (en) | High-purity fluorine gas compressor | |
| CN103528768A (en) | Barrel body online inflation detection and gas recovery system | |
| CN216160105U (en) | Sealing ring sealing capacity verifying device | |
| CN106555570B (en) | Wellhead hydraulic lifting device | |
| CN206236743U (en) | Priming device | |
| CN109585701B (en) | Packaging jig and packaging method | |
| CN209688093U (en) | A kind of sealing device for wheel hub helium leak test | |
| CN220153829U (en) | Large barrel leakage detection equipment | |
| CN221894700U (en) | Filling device is used in tea-seed oil processing | |
| CN220120329U (en) | Detection mechanism for air tightness of shell | |
| CN221484757U (en) | Detection device | |
| CN201433956Y (en) | Environment-friendly vertical pneumatic pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |