CN108591047A - A kind of elastic piston connection structure, high-pressure pumping system and method - Google Patents
A kind of elastic piston connection structure, high-pressure pumping system and method Download PDFInfo
- Publication number
- CN108591047A CN108591047A CN201810232584.3A CN201810232584A CN108591047A CN 108591047 A CN108591047 A CN 108591047A CN 201810232584 A CN201810232584 A CN 201810232584A CN 108591047 A CN108591047 A CN 108591047A
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- China
- Prior art keywords
- piston
- blind hole
- flange
- wall
- connection structure
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- 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.)
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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
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Prostheses (AREA)
- Compressor (AREA)
Abstract
The invention discloses a kind of elastic piston connection structures, high-pressure pumping system and method, elastic piston connection structure includes the flexible piston only being received in piston cavity wall and the connecting elements being fixedly connected with push rod, the rear side end wall of the piston only is recessed blind hole, the connecting elements has the connecting rod in embedded blind hole, the outer rim of the connecting rod has the flange of radially outwardly projecting, the outer diameter of the flange is more than the internal diameter of blind hole, in this elastic piston connection structure, the flange of connection boom end, which is buckled in blind hole, forms back-off structure, so that forming firm connection between connecting elements and piston only, it is linked and packed and is simple and efficient；Moreover, also efficiently avoiding conventional coupling arrangement because the techniques such as bonding, welding, welding generate the possibility of pollutant, the application risk of medical instrument is reduced.
Description
Technical field
The present invention relates to medical equipment technical field, more particularly to a kind of elastic piston connection structure, high-pressure pumping system
And method.
Background technology
In the medical high-pressure pumping system of the prior art, piston is usually cylindrical piston, and piston receiver is simultaneously slidably connected
In piston cavity wall, piston reciprocating is moved to be supplied to power, and fluid is made to be pumped into and leave pump chamber.Piston is pushed away by push rod
Draw movement that piston reciprocating is made to move, piston as being also attached by a rigid connector between flexible member, with push rod,
In the prior art connection type common between flexible member and rigid member be mainly screw connection, it is Nian Jie, weld, welding and
Interference fit connection etc., it is cumbersome all to there is assembly and connection in above-mentioned connection type, needs the problems such as auxiliary is using particular tool.
Invention content
Technical problem to be solved by the invention is to provide a kind of elastic pistons simple in structure, easy to assembly to connect knot
Structure, the high-pressure pumping system with the elastic piston connection structure and the high-pressure pump that fluid pumping is carried out by high-pressure pumping system
Delivery method.
Used technical solution to solve above-mentioned technical problem：A kind of elastic piston connection structure, including it is received in work
The connecting elements filled in the flexible piston only in cavity wall and be fixedly connected with push rod, the rear side end wall of the piston only
It is recessed blind hole, there is the connecting elements connecting rod in embedded blind hole, the outer rim of the connecting rod to have radially outward
The flange of protrusion, the outer diameter of the flange are more than the internal diameter of blind hole.
Preferably, the cross sectional shape of the flange is triangle or quadrangle.
Preferably, the bottom end face in the blind hole is plane, the contact face of the connection boom end and bottom end face
For plane.
Preferably, annular groove is equipped on the side wall of the blind hole.
Preferably, it is equipped with annular groove in the sidewall bottom of the blind hole.
Preferably, the flange is fitting to connection with annular groove.
Preferably, it is respectively formed front side skew wall and rear side skew wall with rear side on front side of the circumferential side wall of the piston only, with
Sunk area is constituted at the circumferential side wall central region of piston only.
Used technical solution to solve above-mentioned technical problem：A kind of high-pressure pumping system, including above-mentioned yielding movable
Fill in connection structure.
Used technical solution to solve above-mentioned technical problem：One kind being pumped by method, passes through above-mentioned pumping system
System carry out fluid pumping method, it is described connection boom end contact face contacted with the bottom end face of the blind hole of piston only with
Piston only is pushed to move forward；The flange of the connection boom end tips upside down on blind hole inner wall to pull piston only to move back
It is dynamic.
Preferably, when piston only moves forward, the bottom end face of the blind hole of the connection boom end and piston only
Contact face bear pressure be less than or equal to 400MPa；When piston only moves backward, the flange of the connection boom end falls
Blind hole inner wall is buckled in pull piston only to move so that the vacuum degree generated in plunger shaft is 0 to -0.1Mpa.
Advantageous effect：In this elastic piston connection structure, the outer diameter for connecting the flange of boom end is more than the blind of piston only
The internal diameter in hole so that flange is buckled in blind hole and blind hole inner wall crimp is formed back-off structure so that connecting rod with
Piston only all forms position limiting structure on axially and radially so that firm company is formed between connecting elements and piston only
It connects, can avoid connecting rod during piston motion and fallen off with piston only, and this is linked and packed and is simple and efficient；Moreover,
Conventional coupling arrangement is also efficiently avoided because the techniques such as bonding, welding, welding generate the possibility of pollutant, reduces Medical treatment device
The application risk of tool.
Description of the drawings
The present invention is described further with reference to the accompanying drawings and examples；
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the part section structural representation of the embodiment of the present invention.
Specific implementation mode
Referring to Figures 1 and 2, elastic piston connection structure of the present invention, including elasticity receive the piston in piston cavity wall
Ontology 10 and the connecting elements 20 being connected with 10 rear end of piston only, wherein connecting elements 20 is connected with push rod, and push rod is past
It is multiple mobile, and then piston only 10 is driven to move back and forth.
The rear side end wall of piston only 10 is recessed blind hole 11, and blind hole 11 is cylinder, the end axis of connecting elements 20
Form connecting rod 21 to stretching, connecting rod 21 is also cylinder, the diameter of connecting rod 21 be slightly larger than or equal to blind hole 11 diameter,
Connecting rod 21 is embedded in blind hole 11, and the end outer rim of connecting rod 21 protrusion that extends radially outwardly forms flange 22, flange 22 it is straight
Diameter is more than the preferably diameter of blind hole 11, is buckled in blind hole 11 by flange 22 and 11 inner wall crimp of blind hole is formed back-off
Structure so that firm connection is formed between connecting elements 20 and piston only 10.Preferably, it is equipped with for flange 22 in blind hole 11
The cross sectional shape of chimeric annular groove 12, flange 22 can be designed as triangle, quadrangle etc., correspondingly, annular groove 12
Shape be also adaptively adjusted.Certainly, blind hole 11 or smooth straight cylindrical bore do not have annular groove
12。
Wherein, the bottom end face in blind hole 11 is plane, correspondingly, the contact face of connecting rod 21 end and bottom end face
Also it is plane.By connecting rod 21 drive piston only 10 in being moved forward and backward in piston cavity wall specific as follows, 21 end of connecting rod
Contact face contacted with the bottom end face of the blind hole 11 of piston only 10 to push piston only to move forward, it is preferable that even
The contact face of 21 end of extension bar bears pressure and is less than or equal to 400MPa；The flange 22 of 21 end of connecting rod is embedding by back-off structure
It closes and piston only 10 is pulled to move backward, it is preferable that when piston only 10 moves backward, the vacuum degree generated in plunger shaft is 0
To -0.1Mpa.
Preferably, front side skew wall 13 and rear side skew wall are respectively formed on front side of the circumferential side wall of piston only 10 with rear side
14, due to the setting of front side skew wall 13 and rear side skew wall 14, depressed area can be constituted in the circumferential side wall central region of piston only
Domain 15, when piston only 10 is received in piston cavity wall, the central region of piston only 10 is not formed with piston cavity wall to be connect
It touches, wherein the maximum gauge of front side skew wall 13 is more than the diameter of piston cavity wall, and maximum gauge refers to front side skew wall 13 towards work
The end diameter on front side of ontology is filled in, to which piston only is received in piston cavity wall, front side skew wall 13 can be with piston cavity wall
Wall surface forms elasticity and supports contact, and 14 end of rear side skew wall, which outwardly protrudes extension, has protrusion 16, the maximum gauge of protrusion 16 big
In the diameter of piston cavity wall, to which piston only is received in piston cavity wall, 16 energy of protrusion on rear side skew wall 14 and piston
The wall surface of cavity wall forms elasticity and supports contact.
Due to the presence of sunk area 15 so that 10 rear section of piston only has larger elasticity in radial directions
Deflection, when connecting rod 21 is embedded in the blind hole 11 of piston only 10,10 rear section of piston only can be radially outward local
Generate subtle flow so that the annular that the flange 22 of 21 end of connecting rod can very well, rapidly be embedded in blind hole 11 is recessed
In slot 12；When 10 elasticity of piston only is received in piston cavity wall, due to protrusion 16 and the piston cavity wall of rear side skew wall 14
Elasticity supports contact so that and the compression of 10 rear section of piston only is deformed radially inwardly, and then is clamped and is held connecting rod 21 tightly, to
So that piston only 10 is more securely connected to form one with connecting elements 20.
High-pressure pumping system of the present invention, including above-mentioned elastic piston connection structure.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned embodiment party
Formula, the technical field those of ordinary skill within the scope of knowledge, can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (10)
1. a kind of elastic piston connection structure, it is characterised in that：Including the flexible piston sheet being received in piston cavity wall
The rear side end wall of body and the connecting elements being fixedly connected with push rod, the piston only is recessed blind hole, the connecting elements
With the connecting rod in embedded blind hole, the outer rim of the connecting rod has the flange of radially outwardly projecting, the outer diameter of the flange
More than the internal diameter of blind hole.
2. elastic piston connection structure according to claim 1, it is characterised in that：The cross sectional shape of the flange is triangle
Shape or quadrangle.
3. elastic piston connection structure according to claim 1, it is characterised in that：Bottom end face in the blind hole is flat
The contact face of face, the connection boom end and bottom end face is plane.
4. elastic piston connection structure according to claim 1, it is characterised in that：Ring is equipped on the side wall of the blind hole
Connected in star.
5. elastic piston connection structure according to claim 4, it is characterised in that：It is equipped in the sidewall bottom of the blind hole
Annular groove.
6. elastic piston connection structure according to claim 4 or 5, it is characterised in that：The flange and annular groove are embedding
Close connection.
7. elastic piston connection structure according to claim 1, it is characterised in that：Before the circumferential side wall of the piston only
Side and rear side are respectively formed front side skew wall and rear side skew wall, to be constituted depressed area at the circumferential side wall central region of piston only
Domain.
8. a kind of high-pressure pumping system, it is characterised in that：Knot is connected including the elastic piston described in claim 1-7 any one
Structure.
9. one kind being pumped by method, which is characterized in that carry out the side of fluid pumping by pumping system according to any one of claims 8
The contact face of method, the connection boom end is contacted with the bottom end face of the blind hole of piston only to push piston only to Forward
It is dynamic；The flange of the connection boom end tips upside down on blind hole inner wall to pull piston only to move backward.
10. according to claim 9 be pumped by method, which is characterized in that when piston only moves forward, the company
The contact face of the bottom end face of the blind hole of extension bar end and piston only bears pressure and is less than or equal to 400MPa；Work as piston only
When moving backward, the flange of the connection boom end tips upside down on blind hole inner wall to pull piston only to move so that in plunger shaft
The vacuum degree of generation is 0 to -0.1Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/125089 WO2019179199A1 (en) | 2018-02-12 | 2018-12-28 | Elastic piston connecting structure, and high-pressure pumping system and method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018101481543 | 2018-02-12 | ||
| CN201810148154 | 2018-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591047A true CN108591047A (en) | 2018-09-28 |
Family
ID=63626916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810232584.3A Pending CN108591047A (en) | 2018-02-12 | 2018-03-20 | A kind of elastic piston connection structure, high-pressure pumping system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108591047A (en) |
| WO (1) | WO2019179199A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019179199A1 (en) * | 2018-02-12 | 2019-09-26 | 惠州海卓科赛医疗有限公司 | Elastic piston connecting structure, and high-pressure pumping system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0575917A2 (en) * | 1992-06-22 | 1993-12-29 | PVB MEDIZINTECHNIK GmbH | Blood sampling device |
| CN1118273A (en) * | 1994-09-07 | 1996-03-13 | 陈隆雄 | Safety syringe |
| JPH08189477A (en) * | 1994-12-28 | 1996-07-23 | Sano Atatsuchi Kenkyusho:Kk | Soil disinfection solution pump |
| CN1668353A (en) * | 2002-07-19 | 2005-09-14 | 贝克顿·迪金森公司 | Single use syringe and plunger rod locking device therefor |
| CN103321892A (en) * | 2013-05-29 | 2013-09-25 | 三一汽车制造有限公司 | Elastic piston and pumping system and engineering machine with elastic piston |
| CN208123056U (en) * | 2018-02-12 | 2018-11-20 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston connection structure, high-pressure pumping system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0824924A1 (en) * | 1996-08-21 | 1998-02-25 | Long-Hsiung Chen | Safety hypodermic syringe |
| US9408975B2 (en) * | 2013-09-06 | 2016-08-09 | Seok-jung Kim | Apparatus for operating syringe piston |
| CN204840528U (en) * | 2015-05-20 | 2015-12-09 | 深圳市安特高科实业有限公司 | Plug, cylinder piston assembly and syringe |
| CN108591047A (en) * | 2018-02-12 | 2018-09-28 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston connection structure, high-pressure pumping system and method |
-
2018
- 2018-03-20 CN CN201810232584.3A patent/CN108591047A/en active Pending
- 2018-12-28 WO PCT/CN2018/125089 patent/WO2019179199A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0575917A2 (en) * | 1992-06-22 | 1993-12-29 | PVB MEDIZINTECHNIK GmbH | Blood sampling device |
| CN1118273A (en) * | 1994-09-07 | 1996-03-13 | 陈隆雄 | Safety syringe |
| JPH08189477A (en) * | 1994-12-28 | 1996-07-23 | Sano Atatsuchi Kenkyusho:Kk | Soil disinfection solution pump |
| CN1668353A (en) * | 2002-07-19 | 2005-09-14 | 贝克顿·迪金森公司 | Single use syringe and plunger rod locking device therefor |
| CN103321892A (en) * | 2013-05-29 | 2013-09-25 | 三一汽车制造有限公司 | Elastic piston and pumping system and engineering machine with elastic piston |
| CN208123056U (en) * | 2018-02-12 | 2018-11-20 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston connection structure, high-pressure pumping system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019179199A1 (en) * | 2018-02-12 | 2019-09-26 | 惠州海卓科赛医疗有限公司 | Elastic piston connecting structure, and high-pressure pumping system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019179199A1 (en) | 2019-09-26 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180928 |
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| RJ01 | Rejection of invention patent application after publication |