CN108869226A - A kind of hand pump - Google Patents
A kind of hand pump Download PDFInfo
- Publication number
- CN108869226A CN108869226A CN201811020127.4A CN201811020127A CN108869226A CN 108869226 A CN108869226 A CN 108869226A CN 201811020127 A CN201811020127 A CN 201811020127A CN 108869226 A CN108869226 A CN 108869226A
- Authority
- CN
- China
- Prior art keywords
- frame
- crank
- buckle
- fixedly connected
- pump
- 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
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of hand pump, including the pump housing and rack, rack includes fixed frame and adjustable shelf, and adjustable shelf rotates with fixed frame and connect, and the pump housing is mutually fixedly connected with adjustable shelf；The fixed frame includes protective frame and falls and set frame, fall set frame with protective frame is perpendicular is fixedly connected, the adjustable shelf is set the one end of frame far from protective frame and is mutually rotatablely connected admittedly with falling, and after adjustable shelf is rotated towards the direction close to protective frame, the pump housing is between protective frame and adjustable shelf；It is described fall to set positioning component is equipped between frame and the adjustable shelf, adjustable shelf is rotated towards the direction close to the protective frame to after parallel with protective frame, and positioning component can limit adjustable shelf and rotate towards the direction close to or far from protective frame；It is an advantage of the current invention that rack can be supported fixed and protection to the pump housing, and it is easy to operate and laborsaving, convenient for storage and carry.
Description
Technical Field
The invention relates to the technical field of pumps, in particular to a hand pump.
Background
The hand pump is usually a piston type pump, and mainly comprises a body, a piston rod, an inlet and an outlet, wherein fluid (such as oil or water) is connected with the inlet through a pipeline, the pressure at the inlet can be kept lower than that at the outlet by pushing and pulling the piston rod in a reciprocating mode, so that the fluid continuously enters the body from the inlet and flows out of the body from the outlet, and the function of pumping the fluid is achieved.
Usually, the piston stroke of hand pump is bigger, and the pump body sets up to long tube-shape, in the course of the work, need to adopt special anchor clamps to press from both sides fixedly or artifical hand-held, and it is complicated with the mode operation of anchor clamps fixed, and the fixed at least two people simultaneous workings (another people push and pull piston rod) of needs of artifical support, and the operation is hard.
Disclosure of Invention
The embodiment of the invention aims to provide a hand pump, which is used for solving the problem that the existing hand pump is difficult to fix in the working process.
In order to achieve the purpose, the technical scheme of the embodiment of the invention is as follows:
a hand pump comprises a pump body and a rack, wherein the rack comprises a fixed frame and a movable frame, the movable frame is rotatably connected with the fixed frame, and the pump body is fixedly connected with the movable frame.
The embodiment of the invention is further provided with: the fixed frame includes protection frame and the frame of putting that falls, and the frame of putting and the perpendicular fixed connection of protection frame looks, the adjustable shelf is connected with the frame of putting that falls and is kept away from the solid rotation of one end of protection frame, and the adjustable shelf is towards the rotatory back of the direction that is close to the protection frame, the pump body is located between protection frame and the adjustable shelf.
The embodiment of the invention is further provided with: the falling frame and the movable frame are provided with a positioning assembly, the movable frame rotates to be parallel to the protection frame in the direction close to the protection frame, and the positioning assembly can limit the movable frame to rotate in the direction far away from the protection frame.
The embodiment of the invention is further provided with: the positioning assembly comprises a first buckle and a second buckle, the first buckle is fixedly connected with the movable frame, and the second buckle is rotatably connected with the fixed frame; the first buckle is fixedly connected with a first buckling part, the second buckle is fixedly connected with a second buckling part, the movable frame rotates towards the direction close to the protection frame to be parallel to the protection frame, and the first buckling part is buckled with the second buckling part.
The embodiment of the invention is further provided with: the positioning assembly further comprises an elastic piece, one end of the elastic piece is elastically connected with the second buckle, the other end of the elastic piece is elastically connected with the fixing frame, and the second buckle part stretches the elastic piece after rotating towards the direction of separating from the first buckle part.
The embodiment of the invention is further provided with: the second buckle is fixedly connected with a lifting rod, and the second buckle is located between the lifting rod and the second buckling part relative to the rotating center of the fixing frame.
The embodiment of the invention is further provided with: the positioning assembly further comprises a positioning block, the positioning block is fixedly connected with the fixed frame, the first buckling part is buckled with the second buckling part, the first buckling part is located between the second buckling part and the positioning block, and when the movable frame continues to rotate in the direction close to the protection frame, the positioning block is abutted to the first buckling part.
The embodiment of the invention is further provided with: the piston rod of the hand pump is rotatably connected with a crank, one end of the crank, which is far away from the crank, is rotatably connected with the pump body, and the central axis of the crank, the central axis of the piston rod, the central axis of the crank, and the central axis of the crank, which are relatively rotated, are parallel to each other.
The embodiment of the invention is further provided with: detachable fixedly connected with concatenation handle in the frame, one of them end of concatenation handle can with the crank is kept away from articulate one end is pegged graft mutually.
The embodiment of the invention is further provided with: the splicing handle comprises an L-shaped handle and a T-shaped handle, and the L-shaped handle and the T-shaped handle are respectively fixedly connected with the rack in an inserting mode.
The embodiment of the invention has the following advantages:
1. when the manual pump lifting device works, the placement frame is placed on the ground or a workbench, the movable frame is rotated towards the direction far away from the protection frame, so that the movable frame is rotated to be parallel to the placement frame, the movable frame is abutted to the ground or the surface of the workbench, the fixed frame can support and fix the pump body, when the piston rod is pushed and pulled through the hand crank, the pump body is not easy to topple, an additional clamp is not needed to be used for fixing the pump body, the pump body is not needed to be supported by hands, the operation is convenient and labor-saving, and the operation is stable;
2. after the movable frame rotates to be parallel to the protection frame, the pump body is positioned between the protection frame and the movable frame, and the protection frame can protect the pump body, so that an external object is prevented from colliding with the pump body, and the pump body is convenient to store and carry;
3. the length of the force arm of the hand crank can be increased after the splicing handle and the hand crank are spliced, and the labor is saved in the process of pushing and pulling the piston rod;
4. the L-shaped handle and the T-shaped handle can be respectively inserted and fixed with the hand crank, so that the length of the force arm of the hand crank is increased, and the T-shaped handle is convenient to hold by two hands;
5. when the hand pump is used on the ground, the L-shaped handle can be inserted into the ground, so that the bent part of the L-shaped handle is pressed on the falling frame, and the stability of the falling frame on the ground is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view illustrating a state of the movable frame after being rotated and unfolded relative to the fixed frame according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a rack architecture embodying an embodiment of the present invention;
FIG. 4 is a schematic diagram of a positioning assembly embodying features of the present invention;
fig. 5 is a schematic view of a crank and crank arrangement embodying an embodiment of the present invention.
Wherein,
1. a pump body; 11. a hand crank; 12. a crank; 13. a piston rod;
2. a frame;
21. a fixed mount; 211. a protective frame; 212. a placement frame;
22. a movable frame; 221. splicing the handles; 2211. an L-shaped handle; 2212. a T-shaped handle;
23. a positioning assembly; 231. a first buckle; 2311. a first buckling part; 232. a second buckle; 2321. a second buckling part; 233. an elastic member; 234. lifting a pull rod; 235. and (5) positioning the blocks.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Examples
A hand pump, as shown in figure 1, comprises a pump body 1 and a frame 2, wherein the frame 2 comprises a fixed frame 21 and a movable frame 22, the movable frame 22 is rotatably connected with the fixed frame 21, and the pump body 1 is fixedly connected with the movable frame 22. The fixed frame 21 can support and fix the pump body 1 without extra fixture or hand holding, the operation is convenient and labor-saving, and the movable frame 22 can change the piston orientation of the hand pump by rotating relative to the fixed frame 21, so that the operation is convenient.
Referring to fig. 2, the fixed frame 21 includes a protection frame 211 and a placement frame 212, the placement frame 212 is perpendicular to and fixedly connected to the protection frame 211, the movable frame 22 is fixed to and rotatably connected to one end of the placement frame 212, which is far from the protection frame 211, and after the movable frame 22 rotates in a direction close to the protection frame 211, the pump body 1 is located between the protection frame 211 and the movable frame 22. The protection frame 211 can protect the pump body 1, prevent other objects from colliding with the pump body 1, and is convenient for storing and carrying the pump body 1.
During operation, the frame 212 that falls is put on ground or the workstation, the rotatory interactive frame of direction towards keeping away from protection frame 211 is parallel with the frame 212 that falls to adjustable shelf 22, the frame 212 that falls is located the coplanar and with ground or workstation surface looks butt with adjustable shelf 22, the pump body 1 is located adjustable shelf 22 top, the pump body 1 compresses tightly adjustable shelf 22 subaerial under self action of gravity, the piston rod 13 of hand pump up, bulldoze piston rod 13 in-process, adjustable shelf 22 can increase the area of contact between the pump body 1 and the ground, adjustable shelf 22 supports the pump body 1, improve the stationarity of the pump body 1. In the process of lifting the piston rod 13, the self gravity of the movable frame 22 and the fixed frame 21 can pull the pump body 1 downwards, so that the connection stability of the pump body 1 and the ground is improved (the pump body 1 can be prevented from being lifted from the ground).
As shown in fig. 3, a positioning assembly 23 is disposed between the placement frame 212 and the movable frame 22, and referring to fig. 4, the positioning assembly 23 includes a first buckle 231 and a second buckle 232, the first buckle 231 is fixedly connected to the movable frame 22, the second buckle 232 is rotatably connected to the fixed frame 21, and a central axis of the second buckle 232 rotating relative to the fixed frame 21 is parallel to a central axis of the movable frame 22 rotating relative to the fixed frame 21; the first buckle 231 is fixedly connected with a first buckling part 2311, the second buckle 232 is fixedly connected with a second buckling part 2321, the movable frame 22 rotates towards the direction close to the protection frame 211 to be parallel to the protection frame 211, and the first buckling part 2311 is buckled with the second buckling part 2321.
The positioning assembly 23 further includes an elastic member 233, the elastic member 233 may be a spring or an elastic rope, in this embodiment, a tension spring is preferably adopted, one end of the elastic member 233 is elastically connected to the second buckle 232, a central axis of the relative rotation between the second buckle 232 and the placement frame 212 is located between a connection position of the elastic member 233 and the second buckle 232 and the second buckling portion 2321, the other end of the elastic member 233 is elastically connected to the fixed frame 21, and the second buckling portion 2321 rotates towards a direction away from the first buckling portion 2311 to stretch the elastic member 233.
The first buckling portion 2311 and the second buckling portion 2321 are both in a barb shape and have opposite directions, in the mutual buckling process of the first buckling portion 2311 and the second buckling portion 2321, the first buckling portion 2311 is firstly mutually abutted with the back surface of the second buckling portion 2321 and pushes the second buckle 232 to rotate, meanwhile, the elastic piece 233 is gradually stretched, the second buckle 232 and the placement frame 212 rotate relatively until the second buckling portion 2321 passes through the first buckling portion 2311, and the elastic piece 233 gradually recovers elastic deformation and shortens to drive the second buckle 232 to rotate and reset, so that the first buckling portion 2311 and the second buckling portion 2321 are buckled with each other.
The second fasteners 232 and the first fasteners 231 are respectively provided with a pair, a lifting rod 234 is arranged between the two second fasteners 232, two ends of the lifting rod 234 are respectively fixedly connected with the two second fasteners 232, and the second fasteners 232 are located between the lifting rod 234 and the second fastening portions 2321 relative to the rotation center of the fixing frame 21. After being lifted by hand in a direction away from the placement frame 212, the second buckle 232 can be driven to rotate relative to the fixing frame 21, so that the second buckling portion 2321 and the first buckling portion 2311 are separated from each other.
The positioning assembly 23 further includes a positioning block 235, the positioning block 235 is fixedly connected to the fixed frame 21, after the first fastening portion 2311 is fastened to the second fastening portion 2321, the first fastening portion 2311 is located between the second fastening portion 2321 and the positioning block 235, when the movable frame 22 continues to rotate in a direction close to the protection frame 211, the positioning block 235 abuts against the first fastening portion 2311 to limit the movable frame 22 to continue to rotate in a direction close to the protection frame 211, and after the first fastening portion 2311 abuts against the positioning block 235, the movable frame 22 is parallel to the protection frame 211.
As shown in fig. 5, a piston rod 13 of the hand pump is rotatably connected with a crank 11, one end of the crank 11 is rotatably connected with a crank 12, one end of the crank 12, which is far away from the crank 11, is rotatably connected with the pump body 1, the central axis of the crank 11, which rotates relative to the piston rod 13, the central axis of the crank 11, which rotates relative to the crank 12, and the central axis of the crank 12, which rotates relative to the pump body 1, are parallel to each other, the crank 11, the crank 12, the pump body 1 and the piston rod 13 form a slider mechanism of the crank 12 (the piston rod 13 has the function of a slider in the slider mechanism of the crank 12), one end of the crank 11, which is far away from the crank 12, is held by hand, and the crank 11 is pushed and pulled in a direction close.
A splicing handle 221 is detachably and fixedly connected to the frame 2, and one end of the splicing handle 221 can be spliced with one end of the hand crank 11 far away from the crank 12. After the splicing handle 221 is detached from the rack 2, the splicing handle 221 is spliced with the hand crank 11, so that the length of the hand crank 11 is increased, the force arm of the hand crank 11 is increased, and labor is saved in the process of pushing and pulling the hand crank 11.
The splicing handle 221 comprises an L-shaped handle 2211 and a T-shaped handle 2212, and the L-shaped handle 2211 and the T-shaped handle 2212 are respectively fixed with the movable frame 22 in an inserting manner. The T-shaped handle 2212 is convenient to hold with two hands, when the hand pump is used on the ground, the L-shaped handle 2211 can be inserted into the ground, so that the bent part of the L-shaped handle 2211 is tightly pressed on the landing frame 212, and the stability of the landing frame 212 on the ground is improved.
Preferably, the protection frame 211, the falling frame 212 and the movable frame 22 are all formed by fixedly connecting hollow pipes in a welding manner, and the protection frame 211 is of a rectangular frame structure, so that the whole weight of the hand pump can be reduced, consumables can be reduced, and the hand pump is convenient to carry. After the adjustable shelf 22 rotated to and parallels with protection frame 211, the frame 212 and the adjustable shelf 22 of falling constituted the cuboid structure of fretwork, and the pump body 1 was located the cuboid structure inboard of this fretwork, was convenient for deposit and carry the hand pump.
Although the present invention has been described in detail above with reference to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention (for example, the frame 2 is not limited to the tubular or rectangular frame shape shown in the drawings or described in the specification, and a plate-like structure may be adopted). Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A hand pump, characterized by: the pump comprises a pump body (1) and a rack (2), wherein the rack (2) comprises a fixed frame (21) and a movable frame (22), the movable frame (22) is rotatably connected with the fixed frame (21), and the pump body (1) is fixedly connected with the movable frame (22).
2. The hand pump as defined in claim 1, wherein: the fixed frame (21) comprises a protective frame (211) and a falling frame (212), the falling frame (212) is vertically and fixedly connected with the protective frame (211), the movable frame (22) is fixedly connected with one end, far away from the protective frame (211), of the falling frame (212) in a rotating mode, the movable frame (22) rotates towards the direction close to the protective frame (211), and the pump body (1) is located between the protective frame (211) and the movable frame (22).
3. A hand pump as claimed in claim 2, wherein: the falling frame (212) and the movable frame (22) are provided with a positioning assembly (23), the movable frame (22) rotates to be parallel to the protective frame (211) in the direction close to the protective frame (211), and the positioning assembly (23) can limit the movable frame (22) to rotate in the direction far away from the protective frame (211).
4. A hand pump according to claim 3, wherein: the positioning assembly (23) comprises a first buckle (231) and a second buckle (232), the first buckle (231) is fixedly connected with the movable frame (22), and the second buckle (232) is rotatably connected with the fixed frame (21); fixedly connected with first buckling part (2311) is gone up in first buckle (231), fixedly connected with second buckling part (2321) is gone up in second buckle (232), and after adjustable shelf (22) rotated to being parallel with protection frame (211) towards the direction that is close to protection frame (211), first buckling part (2311) and second buckling part (2321) looks lock joint.
5. The hand pump as defined in claim 4, wherein: the positioning assembly (23) further comprises an elastic piece (233), one end of the elastic piece (233) is elastically connected with the second buckle (232), the other end of the elastic piece (233) is elastically connected with the fixed frame (21), and the second buckle part (2321) stretches the elastic piece (233) after rotating towards the direction of separating from the first buckle part (2311).
6. The hand pump as defined in claim 4, wherein: the second buckle (232) is fixedly connected with a lifting rod (234), and the second buckle (232) is located between the lifting rod (234) and the second buckling part (2321) relative to the rotating center of the fixed frame (21).
7. The hand pump as defined in claim 4, wherein: the positioning assembly (23) further comprises a positioning block (235), the positioning block (235) is fixedly connected with the fixed frame (21), after the first buckling part (2311) is buckled with the second buckling part (2321), the first buckling part (2311) is located between the second buckling part (2321) and the positioning block (235), and when the movable frame (22) continues to rotate towards the direction close to the protection frame (211), the positioning block (235) is abutted to the first buckling part (2311).
8. The hand pump as defined in claim 1, wherein: the utility model discloses a pump, including the crank, the crank is connected with crank (11) on the piston rod (13) of hand pump rotates, and wherein one end of crank (11) rotates and is connected with crank (12), crank (12) keep away from the one end of crank (11) with the pump body (1) rotates mutually and is connected, and crank (11) and piston rod (13) relative pivoted the central axis, crank (11) and crank (12) relative pivoted the central axis and crank (12) and the pump body (1) relative rotation the central axis be parallel to each other.
9. The hand pump as defined in claim 8, wherein: frame (2) are gone up detachable fixedly connected with concatenation handle (221), one of them one end of concatenation handle (221) can with crank (11) is kept away from the one end of crank (12) is pegged graft mutually.
10. The hand pump as defined in claim 9, wherein: the splicing handle (221) comprises an L-shaped handle (2211) and a T-shaped handle (2212), and the L-shaped handle (2211) and the T-shaped handle (2212) are respectively fixedly connected with the rack (2) in an inserting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811020127.4A CN108869226B (en) | 2018-09-03 | 2018-09-03 | Light folding hand pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811020127.4A CN108869226B (en) | 2018-09-03 | 2018-09-03 | Light folding hand pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108869226A true CN108869226A (en) | 2018-11-23 |
| CN108869226B CN108869226B (en) | 2024-04-19 |
Family
ID=64322812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811020127.4A Active CN108869226B (en) | 2018-09-03 | 2018-09-03 | Light folding hand pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108869226B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430924A (en) * | 1981-08-28 | 1984-02-14 | Hydrowell Sa | Petroleum pumping unit |
| CN2386211Y (en) * | 1999-07-29 | 2000-07-05 | 柳盛今 | Support lever type pedal inflator |
| CN201963514U (en) * | 2011-01-28 | 2011-09-07 | 成都万荣科技有限责任公司 | Portable folding inflator |
| CN202381275U (en) * | 2011-12-30 | 2012-08-15 | 中国人民解放军总后勤部油料研究所 | Portable type manual oil feeding pump |
| WO2013190287A1 (en) * | 2012-06-19 | 2013-12-27 | Hutton Technologies Ltd | Pump |
| CN203411315U (en) * | 2013-08-28 | 2014-01-29 | 北京三兴汽车有限公司 | Movable-type hand-operated oiling machine |
| CN104100515A (en) * | 2013-04-12 | 2014-10-15 | 中国人民解放军总后勤部油料研究所 | Foldable hand pump |
| CN209012007U (en) * | 2018-09-03 | 2019-06-21 | 北京神州港俄机电设备有限公司 | A kind of light collapsible hand pump |
-
2018
- 2018-09-03 CN CN201811020127.4A patent/CN108869226B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4430924A (en) * | 1981-08-28 | 1984-02-14 | Hydrowell Sa | Petroleum pumping unit |
| CN2386211Y (en) * | 1999-07-29 | 2000-07-05 | 柳盛今 | Support lever type pedal inflator |
| CN201963514U (en) * | 2011-01-28 | 2011-09-07 | 成都万荣科技有限责任公司 | Portable folding inflator |
| CN202381275U (en) * | 2011-12-30 | 2012-08-15 | 中国人民解放军总后勤部油料研究所 | Portable type manual oil feeding pump |
| WO2013190287A1 (en) * | 2012-06-19 | 2013-12-27 | Hutton Technologies Ltd | Pump |
| CN104100515A (en) * | 2013-04-12 | 2014-10-15 | 中国人民解放军总后勤部油料研究所 | Foldable hand pump |
| CN203411315U (en) * | 2013-08-28 | 2014-01-29 | 北京三兴汽车有限公司 | Movable-type hand-operated oiling machine |
| CN209012007U (en) * | 2018-09-03 | 2019-06-21 | 北京神州港俄机电设备有限公司 | A kind of light collapsible hand pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108869226B (en) | 2024-04-19 |
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