CN203051027U - Piston type pneumatic circulation gas pump - Google Patents
Piston type pneumatic circulation gas pump Download PDFInfo
- Publication number
- CN203051027U CN203051027U CN2013200397500U CN201320039750U CN203051027U CN 203051027 U CN203051027 U CN 203051027U CN 2013200397500 U CN2013200397500 U CN 2013200397500U CN 201320039750 U CN201320039750 U CN 201320039750U CN 203051027 U CN203051027 U CN 203051027U
- Authority
- CN
- China
- Prior art keywords
- big
- cylinder
- piston
- air pump
- cavity
- 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.)
- Withdrawn - After Issue
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model discloses a piston type pneumatic circulation gas pump comprising a circulation gas pump body, a gas reversing mechanism, a buffer tank and a galvanic pile. The circulation gas pump body comprises a big cylinder and a small cylinder, a big piston is arranged in the big cylinder, a small piston is arranged in the small cylinder, the small cylinder is divided into two chambers through the small piston, and the big cylinder is divided into two chambers through the big piston; the gas reversing mechanism comprises a two-position five-way reversing valve and a reverse switching mechanism, one end of the reverse switching mechanism is connected with the circulation gas pump body, and the other end of the reverse switching mechanism is connected with the two-position five-way reversing valve; a gas outlet of the galvanic pile is communicated with a third chamber inside the big cylinder through a first one-way valve and is further communicated with a fourth chamber inside the big cylinder through a second one-way valve; and the third chamber is communicated with a gas inlet of the buffer tank through a third one-way valve, and a fourth chamber is communicated with the gas inlet of the buffer tank through a fourth one-way valve. Circulation flow of hydrogen inside the galvanic pile is achieved through expansion work released when the hydrogen is compressed for decompression.
Description
Technical field
The utility model relates to reciprocating air pump, more particularly, relates to the pneumatic circulating air pump of a kind of piston type.
Background technique
The pem fuel engine system is a kind of electricity generating device, and it is directly changed into electric energy by electrochemical reaction with the chemical energy in the fuel (normally hydrogen or methyl alcohol).Different with traditional electricity generating device, it does not need to convert the chemical energy in the fuel to heat energy earlier, and then converts electric energy to.Therefore, compare fuel cell with traditional electricity generating device and have the energy conversion efficiency height, the remarkable advantage that pollutant emission is few.
In order to guarantee that proton conduction film fuel battery system (being called for short PEMFCS) continues proper functioning, the liquid water and the foreign gas that need in time to be condensed in the pile anodic interface are discharged.The way that existing P EMFCS takes intermittently to arrange the driving of hydrogen or electric air pump usually realizes the flow hydrogen gas that pile is interior, thereby allows mobile hydrogen that water and foreign gas are taken out of outside the pile.For fuel cell car, pile had both been wasted the fuel (H of loss to effluxing hydrogen
2Fuel reaches 5%) potential safety hazard is arranged again, also can cause the pile pressure fluctuating in inner, influence the working life of membrane electrode; Realizing with electric air pump that hydrogen recycle stream is moving then needs consumed power, also can produce noise and the vibrations that are difficult to eliminate simultaneously, influences car load fuel economy, Security, travelling comfort.
The model utility content
At the defective that exists in the prior art, the purpose of this utility model provides the pneumatic circulating air pump of a kind of piston type.
For achieving the above object, the utility model adopts following technological scheme:
The pneumatic circulating air pump of a kind of piston type comprises the circulation air pump pump housing, gas changement, knock out drum and pile;
The described circulation air pump pump housing comprises horizontally disposed big cylinder and little cylinder, is provided with big piston in the described big cylinder, is provided with small piston in the described little cylinder, links to each other by corresponding piston rod between described big piston and the small piston; Described small piston is divided into two cavitys with little cylinder, wherein forms first cavity between the partition wall of big or small cylinder and the small piston, and another is second cavity; Described big piston is divided into two cavitys with big cylinder, wherein, forms the 3rd cavity between the partition wall of big or small cylinder and the big piston, and another is the 4th cavity;
Described gas changement comprises switch valve with two-position and five-pass and switches mechanism, and two working holes of switch valve with two-position and five-pass are connected with first cavity and second cavity respectively, and the suction port of switch valve with two-position and five-pass is connected with high-pressure air source; The return-air mouth of switch valve with two-position and five-pass is connected with the suction port of knock out drum; A described end of switching mechanism links to each other with the circulation air pump pump housing, and the other end links to each other with switch valve with two-position and five-pass;
The suction port of described pile is connected with the air outlet of described knock out drum, and the air outlet of described pile is connected with the 3rd cavity by first one-way valve, and the air outlet of pile also is connected with the 4th cavity by second one-way valve;
Described the 3rd cavity is connected with the suction port of knock out drum by the 3rd one-way valve, and described the 4th cavity is connected with the suction port of knock out drum by the 4th one-way valve.
Described switch mechanism comprise two often open magnetic switch and magnet ring, described switch valve with two-position and five-pass is the electromagnetic type switch valve with two-position and five-pass,
Described magnet ring is located on the small piston, and the described magnetic switch of often opening is located on the little cylinder, and described position of often opening magnetic switch is corresponding with the position at small piston stroke two ends in stingy cylinder respectively; Perhaps, described magnet ring is located on the big piston, and the described magnetic switch of often opening is located on the big cylinder, and described position of often opening magnetic switch is corresponding in the position at the expert journey of big cylinder two ends with big piston respectively;
The two ends of described electromagnetic type switch valve with two-position and five-pass are respectively equipped with coil, and described arbitrary coil and arbitrary often opening form control loop between the magnetic switch.
The described mechanism of switching comprises driving lever, and described switch valve with two-position and five-pass is the mechanical type switch valve with two-position and five-pass, and the inner and the piston rod of described driving lever are connected and fixed, and the outer end of described driving lever is concave structure; Comprise valve body, two spools and follower lever in the described mechanical type switch valve with two-position and five-pass, described spool is located in the valve body, the inner of described follower lever links to each other with spool, described follower lever the outer end be provided with projection, described projection stretches in the spill outer end of driving lever, the dead in line of described piston rod, driving lever and follower lever;
The both sides of described spill outer end are respectively equipped with block, and the distance between the block is that the running length of big piston or small piston deducts two gap lengths between the spool.
The described circulation air pump pump housing comprises two little cylinders and the big cylinder on the same axis, and described two little cylinders are symmetrically set in the both sides of big cylinder, is respectively equipped with in described each little cylinder in a small piston, the big cylinder and is provided with two big pistons.
The described circulation air pump pump housing comprises two big cylinders and the little cylinder on the same axis, and described two big cylinders are symmetrically set in the both sides of little cylinder, is respectively equipped with in described each big cylinder and is provided with two small pistons in a big piston, the little cylinder.
The described circulation air pump pump housing comprises a big cylinder and a little cylinder, is provided with in the big cylinder and is provided with a small piston in a big piston, the little cylinder.
The described circulation air pump pump housing comprises two big cylinders and two little cylinders, and single big cylinder and single stingy cylinder constitute a cylinder block, and two cylinder block are arranged with the symmetrical configuration of mirror image.
Compared with prior art, adopt the pneumatic circulating air pump of a kind of piston type of the present utility model, it is reciprocating under drive of high-pressure gas to control small piston by switch valve with two-position and five-pass, and is circulated under the driving of big piston by corresponding one-way valve control low-pressure gas.Because the hydrogen that PEMFCS uses is all from gas cylinder, the power supply heap uses after reducing pressure, the expansion work that discharges when therefore utilizing the compression hydrogen decompression realizes that hydrogen circulates in pile, utilize the principle of gas swelling heat absorption to cool off voluntarily when namely utilizing the expansion of compressed gas merit to carry low-pressure gas, have inactivity consumption, no hydrogen loss, friction, need not to dilute tail row hydrogen, efficient height, characteristics such as energy-conservation, make that fuel economy, Security, the travelling comfort of system are all obviously improved.
Description of drawings
Fig. 1 is the structural representation of process one among the embodiment 1 of the present utility model;
Fig. 2 is the structural representation of process two among the embodiment 1 of the present utility model;
Fig. 3 is embodiment's 2 of the present utility model structural representation;
Fig. 4 is another embodiment's of the circulation air pump pump housing of the present utility model structural representation;
Fig. 5 is the another embodiment's of the circulation air pump pump housing of the present utility model structural representation;
Fig. 6 is an embodiment the structural representation again of the circulation air pump pump housing of the present utility model.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
Embodiment 1
See also Fig. 1, the pneumatic circulating air pump of a kind of piston type shown in Figure 2, comprise the circulation air pump pump housing, gas changement 12, knock out drum 13 and pile 14,
The circulation air pump pump housing comprises horizontally disposed two stingy cylinders 111 and a big cylinder 112 on the same axis, two stingy cylinders 111 are symmetrically set in the both sides of big cylinder 112, be respectively equipped with in each stingy cylinder 111 in a small piston 113, the big cylinder 112 and be provided with two big pistons 114, link to each other by corresponding piston rod 115 between big piston 114 and the small piston 113; Small piston 113 is divided into two cavitys with stingy cylinder 111, wherein forms first cavity 116 between the partition wall of big or small cylinder and the small piston, and another is second cavity 117; Described big piston 114 is divided into two cavitys with big cylinder 112, wherein, forms the 3rd cavity 118 between the partition wall of big or small cylinder and the big piston, and another is the 4th cavity 119;
The two ends of electromagnetic type switch valve with two-position and five-pass 121 are respectively equipped with coil 124,127, coil 124, often open magnetic switch 126 and power supply DC series connection and form control loop, and described coil 127, often open magnetic switch 122 and power supply DC series connection and form control loop,
The suction port of pile 14 is connected with the air outlet of described knock out drum 13, and the air outlet of described pile 14 is connected with the 3rd cavity 118 by first one-way valve 16, and the air outlet of pile 14 also is connected with the 4th cavity 119 by second one-way valve 17;
Described the 3rd cavity 118 is connected with the suction port of knock out drum 13 by the 3rd one-way valve 18, and described the 4th cavity 119 is connected with the suction port of knock out drum 13 by the 4th one-way valve 19.
The working procedure of present embodiment is as follows:
See also the process one of Fig. 1 again: high pressure hydrogen is discharged first cavity 116 that enters little cylinder respectively through A1 mouth, A2 mouth by working hole A after being decompressed to the suction port P that enters the electromagnetic type switch valve with two-position and five-pass behind the stingy cylinder working pressure, promoting corresponding small piston 113 moves to the outside, this moment second cavity 117 volume reducing, respectively by the working hole A that enters electromagnetic type switch valve with two-position and five-pass 121 after B1 mouth, the B2 mouth discharge merging, cooled via return air mouth S enters knock out drum 13 and enters pile 14 at last with hydrogen in second cavity 117.Meanwhile, small piston 113 moves by the big piston 114 of piston rod 115 tractions, and the 3rd cavity 118 volumes reduce, and the 4th cavity 119 volumes increase.Hydrogen in the 3rd cavity 118 enters knock out drum 13 through X1 mouth, X2 mouth, the 3rd one-way valve 18 respectively and enters pile 14 at last; Hydrogen Vapor Pressure descends in the 4th cavity 119, and the hydrogen in the pile 14 enters the 4th cavity 119 through second one-way valve 17, Y mouth.At this moment, first one-way valve 16, the 4th one-way valve 19 are closed condition.When small piston moved to the stroke outer end, magnet ring 123 entered the induction region of often opening magnetic switch 126, often opened magnetic switch 126 closures and made coil 124 connect power supply, and the spool of electromagnetic type switch valve with two-position and five-pass 121 moves to the right side and enters process two.
See also the process two of Fig. 2 again: hydrogen is discharged by working hole B after entering electromagnetic type switch valve with two-position and five-pass 121 suction port P, enters second cavity 117 of little cylinder respectively through B1 mouth, B2 mouth, promotes small piston and moves to the centre.The volume of little cylinder first cavity 116 reduces, and the working hole A that enters electromagnetic type switch valve with two-position and five-pass 121 after hydrogen in the chamber is merged by A1 mouth, the extrusion of A2 mouth enters knock out drum 13 through return-air mouth R again and enters pile 14 at last.The 3rd cavity 118 volumes of simultaneously big cylinder increase the 4th cavity 119 volumes and reduce.Hydrogen Vapor Pressure in the 3rd cavity 118 descends, and the hydrogen in the pile enters in the 3rd cavity 118 through first one-way valve 16, X1 mouth, X2 mouth; Hydrogen in the 4th cavity 119 enters knock out drum 13 by the extrusion of Y mouth through the 4th one-way valve 19 and enters pile 14 at last, and at this moment, second one-way valve 17, the 3rd one-way valve 18 are closed condition.When small piston moved to stroke the inner, magnet ring 123 entered the induction region of often opening magnetic switch 122, often opened magnetic switch 122 closures and made coil 127 connect power supplys, and the spool of electromagnetic type switch valve with two-position and five-pass 121 moves to left side, system's return course one.
Total effect is that high pressure hydrogen drives small piston and drives big reciprocating motion of the pistons and the hydrogen in the pile is constantly extracted out sent back to, and the hydrogen of finishing merit simultaneously enters pile as the fuel of pile.
Because piston assembly structure and the quality of symmetric arrangement are identical, the mutual balance of inertial force during two groups of piston synchronous relative motions, externally active force to make a concerted effort be zero, so friction during the pneumatic circulating air pump work of opposed piston.This also is one of advantage of the utility model uniqueness.
Need to prove, the magnet ring of switching in the mechanism can also be located on the big piston, often open magnetic switch and be located on the big cylinder that the position of often opening magnetic switch is corresponding in the position at the expert journey of big cylinder two ends with big piston respectively.
Embodiment 2
See also shown in Figure 3 again, present embodiment and embodiment's 1 difference only is: switch mechanism and comprise driving lever 151, switch valve with two-position and five-pass is mechanical type switch valve with two-position and five-pass 152, and the inner of driving lever 151 and piston rod 115 are connected and fixed, and the outer end of driving lever 151 is concave structure; Comprise valve body 153, two spools 154 and follower lever 155 in the mechanical type switch valve with two-position and five-pass 152, spool 154 is located in the valve body 153, the inner of follower lever 155 links to each other with spool 154, follower lever 155 the outer end be provided with the projection 156, projection 156 stretches in the spill outer end of driving lever 151 dead in line of piston rod 115, driving lever 151 and follower lever 155;
The both sides of spill outer end are respectively equipped with block 157, and the distance between the block 157 is that the running length of big piston or small piston deducts two gap lengths between the spool.
All the other contents are all with identical described in the embodiment 1.
Need to prove that the structure of the circulation air pump pump housing among above-mentioned two embodiments is all right as Fig. 4, Fig. 5, shown in Figure 6,
The circulation air pump pump housing comprises two big cylinders and the little cylinder on the same axis in Fig. 4, and described two big cylinders are symmetrically set in the both sides of little cylinder, is respectively equipped with in described each big cylinder and is provided with two small pistons in a big piston, the little cylinder.
The circulation air pump pump housing comprises a big cylinder and a little cylinder in Fig. 5, is provided with in the big cylinder and is provided with a small piston in a big piston, the little cylinder.
The circulation air pump pump housing comprises two big cylinders and two little cylinders in Fig. 6, and single big cylinder and single stingy cylinder constitute a cylinder block, and two cylinder block are arranged with the symmetrical configuration of mirror image, among the figure with two little cylinders in the inboard, two big cylinders are side outside.Need to prove that the symmetrical configuration of mirror image is arranged and also comprised two big cylinders in the inboard, two little cylinders are the arranging structure of side outside.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the purpose of this utility model, and be not with opposing restriction of the present utility model, as long as in essential scope of the present utility model, all will drop in the scope of claim of the present utility model the above embodiment's variation, modification.
Claims (7)
1. pneumatic circulating air pump of piston type is characterized in that:
Comprise the circulation air pump pump housing, gas changement, knock out drum and pile,
The described circulation air pump pump housing comprises horizontally disposed big cylinder and little cylinder, is provided with big piston in the described big cylinder, is provided with small piston in the described little cylinder, links to each other by corresponding piston rod between described big piston and the small piston; Described small piston is divided into two cavitys with little cylinder, wherein forms first cavity between the partition wall of big or small cylinder and the small piston, and another is second cavity; Described big piston is divided into two cavitys with big cylinder, wherein, forms the 3rd cavity between the partition wall of big or small cylinder and the big piston, and another is the 4th cavity;
Described gas changement comprises switch valve with two-position and five-pass and switches mechanism, and two working holes of switch valve with two-position and five-pass are connected with first cavity and second cavity respectively, and the suction port of switch valve with two-position and five-pass is connected with high-pressure air source; The return-air mouth of switch valve with two-position and five-pass is connected with the suction port of knock out drum; A described end of switching mechanism links to each other with the circulation air pump pump housing, and the other end links to each other with switch valve with two-position and five-pass;
The suction port of described pile is connected with the air outlet of described knock out drum, and the air outlet of described pile is connected with the 3rd cavity by first one-way valve, and the air outlet of pile also is connected with the 4th cavity by second one-way valve;
Described the 3rd cavity is connected with the suction port of knock out drum by the 3rd one-way valve, and described the 4th cavity is connected with the suction port of knock out drum by the 4th one-way valve.
2. the pneumatic circulating air pump of piston type according to claim 1 is characterized in that:
Described switch mechanism comprise two often open magnetic switch and magnet ring, described switch valve with two-position and five-pass is the electromagnetic type switch valve with two-position and five-pass,
Described magnet ring is located on the small piston, and the described magnetic switch of often opening is located on the little cylinder, and described position of often opening magnetic switch is corresponding with the position at small piston stroke two ends in stingy cylinder respectively; Perhaps, described magnet ring is located on the big piston, and the described magnetic switch of often opening is located on the big cylinder, and described position of often opening magnetic switch is corresponding in the position at the expert journey of big cylinder two ends with big piston respectively;
The two ends of described electromagnetic type switch valve with two-position and five-pass are respectively equipped with coil, and described arbitrary coil and arbitrary often opening form control loop between the magnetic switch.
3. the pneumatic circulating air pump of piston type according to claim 1 is characterized in that:
The described mechanism of switching comprises driving lever, and described switch valve with two-position and five-pass is the mechanical type switch valve with two-position and five-pass, and the inner and the piston rod of described driving lever are connected and fixed, and the outer end of described driving lever is concave structure; Comprise valve body, two spools and follower lever in the described mechanical type switch valve with two-position and five-pass, described spool is located in the valve body, the inner of described follower lever links to each other with spool, described follower lever the outer end be provided with projection, described projection stretches in the spill outer end of driving lever, the dead in line of described piston rod, driving lever and follower lever;
The both sides of described spill outer end are respectively equipped with block, and the distance between the block is that the running length of big piston or small piston deducts two gap lengths between the spool.
4. according to the pneumatic circulating air pump of each described piston type in the claim 1 to 3, it is characterized in that:
The described circulation air pump pump housing comprises two little cylinders and the big cylinder on the same axis, and described two little cylinders are symmetrically set in the both sides of big cylinder, is respectively equipped with in described each little cylinder in a small piston, the big cylinder and is provided with two big pistons.
5. according to the pneumatic circulating air pump of each described piston type in the claim 1 to 3, it is characterized in that:
The described circulation air pump pump housing comprises two big cylinders and the little cylinder on the same axis, and described two big cylinders are symmetrically set in the both sides of little cylinder, is respectively equipped with in described each big cylinder and is provided with two small pistons in a big piston, the little cylinder.
6. according to the pneumatic circulating air pump of each described piston type in the claim 1 to 3, it is characterized in that:
The described circulation air pump pump housing comprises a big cylinder and a little cylinder, is provided with in the big cylinder and is provided with a small piston in a big piston, the little cylinder.
7. according to the pneumatic circulating air pump of each described piston type in the claim 1 to 3, it is characterized in that:
The described circulation air pump pump housing comprises two big cylinders and two little cylinders, and single big cylinder and single stingy cylinder constitute a cylinder block, and two cylinder block are arranged with the symmetrical configuration of mirror image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200397500U CN203051027U (en) | 2013-01-24 | 2013-01-24 | Piston type pneumatic circulation gas pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200397500U CN203051027U (en) | 2013-01-24 | 2013-01-24 | Piston type pneumatic circulation gas pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051027U true CN203051027U (en) | 2013-07-10 |
Family
ID=48733986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200397500U Withdrawn - After Issue CN203051027U (en) | 2013-01-24 | 2013-01-24 | Piston type pneumatic circulation gas pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051027U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062011A (en) * | 2013-01-24 | 2013-04-24 | 上海新源动力有限公司 | Piston type pneumatic circulating gas pump |
| CN104179657A (en) * | 2014-08-12 | 2014-12-03 | 南京师范大学 | Passive pneumatic pressurizing device for underground coal mine |
| CN108425847A (en) * | 2018-04-03 | 2018-08-21 | 上海新源动力有限公司 | A kind of automatic reverse oscillating cylinder formula gas circulator |
-
2013
- 2013-01-24 CN CN2013200397500U patent/CN203051027U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062011A (en) * | 2013-01-24 | 2013-04-24 | 上海新源动力有限公司 | Piston type pneumatic circulating gas pump |
| CN103062011B (en) * | 2013-01-24 | 2015-06-10 | 上海新源动力有限公司 | Piston type pneumatic circulating gas pump |
| CN104179657A (en) * | 2014-08-12 | 2014-12-03 | 南京师范大学 | Passive pneumatic pressurizing device for underground coal mine |
| CN108425847A (en) * | 2018-04-03 | 2018-08-21 | 上海新源动力有限公司 | A kind of automatic reverse oscillating cylinder formula gas circulator |
| CN108425847B (en) * | 2018-04-03 | 2024-02-23 | 上海新源动力有限公司 | Automatic reversing swing cylinder type gas circulating pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103062011B (en) | Piston type pneumatic circulating gas pump | |
| CN203051027U (en) | Piston type pneumatic circulation gas pump | |
| CN106784960A (en) | A kind of integral type reversible fuel cell system | |
| CN207921397U (en) | Oxygenerating valve | |
| CN110299581A (en) | Aluminum air battery system | |
| CN101645513B (en) | Piston type hydrogen conveyor for fuel cell | |
| CN113113640A (en) | Hydrogen supply system and method for fuel cell | |
| CN215496804U (en) | Hydrogen supply system for fuel cell | |
| US20230270624A1 (en) | Gas circuit control system of pneumatic cardiopulmonary resuscitation pressing device | |
| CN113667997A (en) | High-pressure proton exchange membrane electrolytic water system | |
| CN114715818B (en) | Separate type electro-hydraulic driven forklift potential energy recovery system and separate type electro-hydraulic driven forklift | |
| CN208281180U (en) | A kind of automatic reverse oscillating cylinder formula gas circulator | |
| CN107687453B (en) | Loading machine action potential recycling system | |
| CN215257041U (en) | Electric proportional pump emergency control device and concrete pump truck | |
| CN209334550U (en) | A kind of embossing die of supercapacitor and housing of power cell | |
| CN205202995U (en) | Electric vacuum pump who matches braking system | |
| CN102230460A (en) | Oil hydraulic type piston oil-free extra-high pressure air compressor | |
| CN216473504U (en) | High-pressure proton exchange membrane electrolytic water system | |
| CN104989686B (en) | Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof | |
| CN214505554U (en) | Hydrogen energy automobile fuel cell air circulation system and hydrogen energy automobile | |
| CN210429978U (en) | Hydrogen fuel cell system | |
| CN112539204A (en) | Electric proportional pump emergency control device and concrete pump truck | |
| CN202194800U (en) | Oil-pressure piston oil-free extra-high-pressure air compressor | |
| CN204677393U (en) | A kind of inflate compression integrated machine | |
| CN206957893U (en) | Linear compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130710 Effective date of abandoning: 20150610 |
|
| RGAV | Abandon patent right to avoid regrant |