CN208416912U - A kind of medical plunger pump and its chamber structure - Google Patents
A kind of medical plunger pump and its chamber structure Download PDFInfo
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- CN208416912U CN208416912U CN201820707158.6U CN201820707158U CN208416912U CN 208416912 U CN208416912 U CN 208416912U CN 201820707158 U CN201820707158 U CN 201820707158U CN 208416912 U CN208416912 U CN 208416912U
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Abstract
The utility model relates to medical pump technical fields, more particularly to a kind of medical plunger pump chamber structure, including the pump housing, the pump housing offers at least one plunger cavity, plunger cavity includes the pistons work section to move reciprocatingly for piston and the joining section for connecting piston with push rod during the motion, joining section includes the first arcwall away from pistons work section direction protrusion, the smooth connection of side wall of the first end and pistons work section of first arcwall, the second end of the first arcwall is bent along the direction for deviateing pistons work section axis to be extended；Further relate to a kind of medical plunger pump, including above-mentioned chamber structure, piston component is slideably equipped in plunger cavity, piston component includes push rod and piston, piston includes the sealing being close to the side wall of pistons work section and at the joint portion that joining section is engaged with the push rod, realizes being quickly engaged for piston and push rod.
Description
Technical field
The utility model relates to medical pump technical field more particularly to a kind of medical plunger pumps and its chamber structure.
Background technique
In fluid dynamic technology, high-pressure pump is one of the core component of medical fluid dynamical system, frequently with plunger pump etc.
Working standard part.When existing medical high-pressure pump, liquid enter plunger pump and is pressurized, plunger cavity is equipped with and is pumped into channel and water outlet
Channel is formed endlessly high pressure water flow and is pumped out by the reciprocating motion of piston.
In the prior art, general piston is to be fixedly connected, but medical pump is higher to hygienic requirements with push rod, and piston is general
It is disposable product, push rod is caused to need to remove, in order to save the cost of push rod, needs piston and push rod company is fixed
Connect, the process is more complicated, inconvenient to use, and in the plunger shaft of existing Plunger pump body generally by the constant inner wall of diameter and
Skew wall composition, the constant inner wall of diameter and skew wall junction form angle cusp, when piston is pushed into inner wall, due to piston and
Inner wall angle cusp friction, it is easy to scratch outer surface of piston, cause outer surface of piston roughness to increase, since piston cavity wall has
Very high seal request will reach mirror effect, be easy to destroy plunger shaft wall mirror effect because outer surface of piston is coarse, thus
Pump housing service life is reduced, and since the variation of the inner diameter of skew wall is more gentle, so that skew wall length increases, causes entirely to pump
Fluid chamber is elongated, and volume becomes larger.
Utility model content
The purpose of the utility model is to provide one kind to advantageously reduce pump housing damage, improves pump housing service life, while just
In plunger pump and its chamber structure that piston and push rod are stably connected with.
To achieve the goals above, the utility model provides a kind of medical plunger pump chamber structure, including the pump housing, described
The pump housing offers at least one plunger cavity, and the plunger cavity includes the pistons work section to move reciprocatingly for piston and for making
The joining section that piston is connect with push rod during the motion, the joining section include away from pistons work section direction protrusion
First arcwall, the smooth connection of side wall of the first end and pistons work section of first arcwall, first arcwall
Second end is bent along the direction for deviateing pistons work section axis to be extended.
The further improvement of the technical program is that the bending radius of first arcwall is 1mm~30mm.
The further improvement of the technical program is the inner wall surface roughness of the pistons work section are as follows: Ra0.012~
Ra1.6 or Rmax0.4~Rmax64 or Rz0.025~Rz1.6.
The further improvement of the technical program is that the plunger cavity further includes turbulent section, and the plunger cavity further includes turbulent flow
Section, the turbulent flow section has to be recessed the curved wall to be formed away from pistons work section direction, the curved wall and pistons work section
Side wall connection.
The further improvement of the technical program, which is that the pump housing is also provided with, to be pumped out channel and is pumped into channel, described to pump out
Channel be connected to plunger cavity and pump out channel offset pistons work section axis setting, it is described be pumped into channel be connected to plunger cavity and
It is pumped into the axis setting of channel offset pistons work section.
The further improvement of the technical program is that the axial line distance for pumping out passage axis and pistons work section is
0.1mm~50mm, the passage axis and the axial line distance of pistons work section of being pumped into is 0.1mm~50mm, described to pump out channel
Rounded corner, the rounding radii are as follows: 0.05mm~1.5mm are respectively present with channel both ends are pumped into.
The further improvement of the technical program is to pass through withdrawing between the curved wall and the side wall of the pistons work section
Slot connection, the groove width of the escape are 0.1mm~10mm.
The further improvement of the technical program is that the plunger cavity further includes the empty avoiding that internal diameter is greater than the pistons work section
Section, the empty avoiding section are connect with the second end of first arcwall, and the side wall of the empty avoiding section offers annular groove, described
Annular groove is embedded with block piece.
The further improvement of the technical program is that the plunger cavity further includes guide section, the one of the side wall of the guide section
End is connect with joining section.
The further improvement of the technical program is that the guide section includes straight walls and the second arcwall, second arc
The both ends of shape wall are separately connected the second end of straight walls and the first arcwall, and the straight walls and the axis of piston mobile section are flat
Row, the first end of second arcwall and the second end of the first arcwall are tangent, the second end of second arcwall with directly
Line wall is tangent.
The further improvement of the technical program is, the guide section includes skew wall, third arcwall and straight walls, described
Second end, skew wall, third arcwall and the straight walls of one arcwall are sequentially connected, the axis of the straight walls and piston mobile section
In parallel, first arcwall is distinguished tangent with skew wall, skew wall and third arcwall, third arcwall and straight walls.
The further improvement of the technical program is that the plunger cavity further includes the empty avoiding that internal diameter is greater than the pistons work section
Section, the both ends of the guide section are separately connected joining section and empty avoiding section, and the side wall of the empty avoiding section offers annular groove, described
Annular groove is embedded with block piece.
The further improvement of the technical program is the quantity at least two of the plunger cavity.
A kind of medical plunger pump, includes chamber structure, and piston component is slideably equipped in the plunger cavity, described
Piston component includes push rod and piston；The piston includes the sealing being close to the side wall of the pistons work section and described
The joint portion that joining section is engaged with the push rod.
The further improvement of the technical program is, the joint portion includes at least two claw, the one of the claw
End is connect with sealing, and the other end of the claw extends along the direction for deviateing sealing axis, described at least two claw
Engaging chamber is formed after closing up；
One end of the push rod is equipped in the joining section and the clamping portion for engaging chamber cooperation and being connected and fixed.
Implement the embodiments of the present invention, has following technical effect that
The utility model structure is simple, and push rod pushes piston when joining section moves, in the squeezing action of the first arcwall
Under, so that push rod is engaged with piston, meanwhile, the setting of the first arcwall makes piston component when entering pistons work section, piston
Contact with plunger cavity is smooth, and then reduces the friction of piston and plunger cavity wall, makes piston movable track in plunger cavity
It is softer, lesser thrust can be used by piston propelling piston chamber；In addition, the first arcwall and the side wall of pistons work section connect
It is more gentle to meet place, stress acute variation can be further decreased, reduces the risk that outer surface of piston generates damage, does not destroy work
Outer surface roughness keeps the pump housing to generate high pressure so that plunger shaft mirror effect will not be destroyed, and improves pump housing service life；
Finally, the variation of the first arcwall is larger relative to the variation degree of skew wall, the open end of plunger cavity can be reduced to pistons work
The distance of section, and then reduce the volume of the pump housing.
By the way that push rod is close with piston, piston is pushed into plunger cavity the utility model by push rod, during propulsion,
Engaging chamber gradually collapses under the action of the first arcwall, and is clamped with the clamping portion of push rod, realize piston and push rod it
Between fixation, it is convenient and efficient, without connecting push rod with piston by other movement, can be realized piston push-in plunger cavity with
The operation of piston connection push rod.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of push rod and piston engagement state in the preferred embodiment in the utility model 1；
Fig. 2 is the structural schematic diagram of push rod and piston debonding state in the preferred embodiment in the utility model 1；
Fig. 3 is the enlarged diagram in the preferred embodiment in the utility model 1 at A；
Fig. 4 is the enlarged diagram of another diameter of the second arcwall in the preferred embodiment in the utility model 1 at A；
Fig. 5 is that the second arcwall diameter in the preferred embodiment in the utility model 1 at A shows different from the amplification of Fig. 3 and Fig. 4
It is intended to；
Fig. 6 is the enlarged diagram of joining section and empty avoiding section junction in the preferred embodiment in the utility model 2；
Fig. 7 is the enlarged diagram of joining section and guide section junction in the preferred embodiment in the utility model 3；
Fig. 8 is the structural schematic diagram of the piston component of the preferred embodiment in the utility model 1~4；
Fig. 9 is the structural schematic diagram of push rod and piston engagement state in the preferred embodiment in the utility model 4.
Description of symbols:
1, the pump housing, 11, pistons work section, 12, joining section, the 121, first arcwall, 13, turbulent section, 131, curved wall,
14, channel is pumped out, 15, empty avoiding section, 151, annular groove, 16, guide section, 161, straight walls, the 162, second arcwall, 163, tiltedly
Wall, 164, third arcwall, 17, be pumped into channel, 18, escape, 2, piston component, 21, piston, 211, sealing, 212, connect
Conjunction portion, 2121, claw, 2122, engaging chamber, 22, push rod, 221, clamping portion, 3, block piece.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
Embodiment 1:
The preferred embodiment in the utility model refers to Fig. 1~5 and Fig. 8, a kind of medical plunger pump chamber structure, including the pump housing
1, the pump housing 1 offers at least one plunger cavity, and plunger cavity includes the pistons work section 11 to move reciprocatingly for piston 21 and uses
In the joining section 12 for connecting piston 21 with push rod 22 during the motion, joining section 12 includes deviating from the pistons work section 11
First arcwall 121 of direction protrusion, the smooth connection of side wall of the first end and pistons work section 11 of the first arcwall 121, the
The second end of one arcwall 121 is bent along the direction for deviateing 11 axis of pistons work section to be extended.
The utility model structure is simple, and push rod 22 pushes piston 21 when joining section 12 moves, in the first arcwall 121
Under squeezing action, so that push rod 22 is engaged with piston 21, meanwhile, the setting of the first arcwall 121 is entering piston component 2
When pistons work section 11, reduces the contact area of plunger cavity, and then reduce the friction of piston 21 and plunger cavity wall, make piston 21
Movable track is softer in plunger cavity, and lesser thrust can be used by 21 propelling piston chamber of piston；In addition, the first arc
Wall 121 and the side wall junction of pistons work section 11 are more gentle, can further decrease stress acute variation, reduce piston 21
Outer surface generates the risk of damage, does not destroy 21 outer surface roughness of piston, so that plunger shaft mirror effect will not be destroyed, keeps
The pump housing 1 generates high pressure, improves 1 service life of the pump housing；Finally, variation degree of the variation of the first arcwall 121 relative to skew wall
It is larger, the open end of plunger cavity can be reduced to the distance of pistons work section 11, and then reduce the volume of the pump housing 1.
In the present embodiment, the bending radius of the first arcwall 121 is 1mm~30mm, makes the variation rail of the first arcwall
Mark is more soft, further decreases friction of the piston in the movement of pistons work section to plunger cavity, improves pump housing service life.
Specifically, the inner wall surface roughness of pistons work section 11 is Ra0.012~Ra1.6 or Rmax0.4~Rmax64
Or Rz0.025~Rz1.6, it is based on above-mentioned roughness, piston 21 there can be good mobile effect when pistons work section 11 is mobile
Rate and leakproofness, and water flow is flowed in pistons work section 11, be can be reduced the friction of water flow Yu 11 inner wall surface of pistons work section, is subtracted
Influence of the heat caused by small friction to working environment, finally, 11 inner wall of pistons work section of above-mentioned roughness can have
Good working characteristics and be conducive to control processing cost, improve the yield rate and final product quality of product.
Wherein, plunger cavity further includes turbulent section 13, and turbulent section 13 has away from far from 11 direction concave shape of pistons work section
At curved wall 131, curved wall 131 connect with the side wall of pistons work section 11, and the pump housing 1, which is also provided with, to be pumped out channel 14 and be pumped into
Channel 17 pumps out channel 14 and the axis setting that channel 14 deviates pistons work section 11 is connected to and pumped out with plunger cavity, is pumped into channel
17 be connected to plunger cavity and be pumped into channel 17 deviate pistons work section 11 axis setting, by be arranged curved wall 131, facilitate
Slow down the impact force of fluid impact plunger cavity bottom, meanwhile, pump out axis and curved wall that channel 14 deviates pistons work section 11
131 connections, make fluid after impacting curved wall 131, form turbulent flow and flow out from side, rather than are directly expressed to by piston 21
The extrusion of channel 14 is pumped out, being conducive to, which enhances fluid, pumps out pressure, forms high-pressure fluid.
Further, the axial line distance for pumping out 14 axis of channel and pistons work section 11 is 0.1mm~50mm, is pumped into channel
The axial line distance of axis and pistons work section is 0.1mm~50mm, facilitates the internal volume for reducing plunger cavity, pumps out channel 14
Rounded corner, rounding radii are respectively present with 17 both ends of channel are pumped into are as follows: 0.05mm~1.5mm, reduction pump out channel 14 and pump
Enter the burr that the processing of channel 17 is formed and reduces hydraulic loss conducive to the smooth of water flow.
It is connected between the curved wall 131 of the present embodiment and the side wall of pistons work section 11 by escape 18, cutter is made to exist
When being ground plunger cavity wall, the machined surface of grinding process is extended to the end of pistons work section 11, escape 18 convenient for cutter
Groove width be 0.1mm~10mm, it is subsequent that cutter is facilitated to exit.
Specifically, plunger cavity further includes guide section 16, one end of the side wall of guide section 16 is connect with joining section 12, in this reality
It applies in example, guide section 16 includes straight walls 161 and the second arcwall 162, and the both ends of the second arcwall 162 are separately connected straight walls
161 and first arcwall 121 second end, straight walls 161 are parallel with the axis of pistons work section 11, the second arcwall 162
First end and the second end of the first arcwall 121 are tangent, and the second end and straight walls 161 of the second arcwall 162 are tangent, based on upper
State structure, it is to be understood that piston 21 is successively promoted in straight walls 161 and the second arcwall 162, holds that piston 21 more
Easily enter joining section 12, then realizes that piston 21 is connected and fixed with push rod 22 via joining section 12, further increase joint efficiency；
Certainly, in practical applications, the diameter of the second arcwall 162 can be selected as needed.
With reference to Fig. 1, further, plunger cavity further includes the empty avoiding section 15 that internal diameter is greater than 11 sections of the pistons work, guiding
The both ends of section 16 are separately connected joining section 12 and empty avoiding section 15, and the side wall of empty avoiding section 15 offers annular groove 151, annular groove
151 are embedded with block piece 3, prevent piston 21 from exiting plunger cavity under the action of push rod 22, and the liquid in plunger cavity is caused to flow out
It pollutes.
With reference to Fig. 1, Fig. 2 and Fig. 8, a kind of medical plunger pump is slidably equipped with work in plunger cavity including above-mentioned chamber structure
Plug assembly 2, piston component 2 include piston 21 and push rod 22, and piston 21 includes the sealing being close to the side wall of pistons work section 11
Portion 211 and at the joint portion that joining section 12 is engaged with push rod 22 212, joint portion 212 includes at least two claw 2121, card
One end of pawl 2121 is connect with sealing 211, the other end extends along the direction for deviateing 211 axis of sealing, and claw 2121 is separate
One end of sealing 211 extends to form engaging chamber 2122 inwardly, one end of push rod 22 be equipped with joining section 12 with engage chamber
2122 clamping portions 221 that are clamped of cooperation, when in use, by the way that push rod 22 and piston 21 is close, push rod 22 is by piston 21
It is pushed into plunger cavity, during propulsion, firstly, claw 2121 and 21 axis of piston form angle, the range of the angle is 1
~45 °, continue to promote, when 2121 lateral surface of claw is contacted with the first arcwall 121, at this point, 2121 lateral surface of claw and first
Arcwall 121 is line contact, and the profile of line contact is circle, the contact of 2121 lateral surface of claw and the first arcwall 121
Line is gradually moved to pistons work section 11 along the first arcwall 121, and in the process, it is straight that line contacts the circular contour to be formed
Diameter is gradually reduced, and closes up claw 2121 gradually, finally, the engaging chamber 2122 that is formed after closing up of at least two claw 2121 with
The clamping portion 221 of 22 one end of push rod connects and fixes, and realizes that push rod 22 is moved back and forth with piston 21 in pistons work section 11.
It, can be to appoint specifically, clamping portion 221 can be and be not limited to one of bullet after cylindrical boss, sphere
A kind of what structure that can connect two components and two components is prevented to be detached from connection direction, while engaging the shape of chamber 2122
Shape and the shape cooperation of clamping portion 221 are connected and fixed.
Claw 2121 gradually closes up to form engaging chamber 2122 under the action of the first arcwall 121, and the card with push rod 22
Socket part 221 is clamped, and realizes the fixation between piston 21 and push rod 22, convenient and efficient, without making to push away by other movement
Bar 22 is connect with piston 21, and piston 21 can be realized and be pushed into the operation that plunger cavity makes piston 21 connect push rod 22.
Embodiment 2:
With reference to Fig. 6, the present embodiment the difference from embodiment 1 is that: between joining section 12 and empty avoiding section 15 do not have guiding
Section 16, the second end of joining section 12 is connect with empty avoiding section 15, reduces pistons work section 11 at a distance from plunger cavity open end, equally
The plunger cavity of size, piston 21 move the risk more smooth, reduction by 21 surface of piston is destroyed under the effect of push rod 22.
The other structures of the present embodiment in the same manner as in Example 1, are no longer repeated herein.
Embodiment 3:
With reference to Fig. 7, the present embodiment the difference from embodiment 1 is that, guide section 16 include skew wall 163, third arcwall 164
With straight walls 161, straight walls 161 are parallel with the axis of pistons work section 11, the second end of the first arcwall 121, skew wall 163,
Third arcwall 164 and straight walls 161 are sequentially connected, and the first arcwall 121 and skew wall 163, skew wall 163 and third arcwall
164, third arcwall 164 distinguish with straight walls 161 it is tangent, be based on above structure, it is to be understood that by piston in straight walls
161, third arcwall 164, successively promote in skew wall 163, make piston 21 be easier to enter joining section 12, then via joining section
12 realization pistons 21 are connected and fixed with push rod 22, further increase joint efficiency.
The other structures of the present embodiment in the same manner as in Example 1, are no longer repeated herein.
Embodiment 4:
With reference to Fig. 9, the present embodiment the difference from embodiment 1 is that, the pump housing 1 in the present embodiment is opened up there are two plunger
Chamber, interaction moves reciprocatingly piston 21 in two plunger cavities respectively, since two plunger cavities do reciprocal motion, the water flow pumped out
A stable level can be remained at, single plunger cavity is different from, single plunger cavity is fashionable in tap aspirator, pumps out channel 14
There is no continuous water flow to pump out, cause water flow output stability poor, i.e., embodiment improves plunger cavity water flow pump out it is steady
It is qualitative.
The other structures of the present embodiment in the same manner as in Example 1, are no longer repeated herein.
To sum up, since the first arcwall 121 is arranged, push rod 22 pushes piston 21 when joining section 12 moves, in the first arc
Under the squeezing action of shape wall 121, so that push rod 22 is engaged with piston 21, meanwhile, the setting of the first arcwall 121 makes piston group
Part 2 reduces the contact area of plunger cavity when entering pistons work section 11, and then reduces rubbing for piston 21 and plunger cavity wall
It wipes, keeps the movable track in plunger cavity of piston 21 softer, lesser thrust can be used by 21 propelling piston chamber of piston；Separately
Outside, the first arcwall 121 and the side wall junction of pistons work section 11 are more gentle, can further decrease stress and acutely become
Change, reduces the risk that 21 outer surface of piston generates damage, 21 outer surface roughness of piston is not destroyed, so that plunger shaft will not be destroyed
Mirror effect keeps the pump housing 1 to generate high pressure, improves 1 service life of the pump housing；Finally, the variation of the first arcwall 121 is relative to oblique
The variation degree of wall is larger, can reduce the open end of plunger cavity to the distance of pistons work section 11, and then reduce the body of the pump housing 1
Product.
It should be understood that various information are described in the utility model using term " first ", " second " etc., but these
Information should not necessarily be limited by these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from this
In the case where utility model range, " first " information can also be referred to as " second " information, and similar, " second " information can also be with
Referred to as " first " information.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change
It also should be regarded as the protection scope of the utility model into replacement.
Claims (15)
1. a kind of medical plunger pump chamber structure, which is characterized in that including the pump housing, the pump housing offers at least one plunger
Chamber, the plunger cavity include the pistons work section to move reciprocatingly for piston and for make piston during the motion with push rod
The joining section of connection, the joining section include the first arcwall away from pistons work section direction protrusion, first arc
The smooth connection of side wall of the first end and pistons work section of shape wall, the second end of first arcwall is along deviation pistons work section
The direction of axis, which is bent, to be extended.
2. plunger pump chamber structure according to claim 1, which is characterized in that the bending radius of first arcwall is
1mm~30mm.
3. plunger pump chamber structure according to claim 1, which is characterized in that the inner wall surface of the pistons work section is thick
Rugosity are as follows: Ra0.012~Ra1.6 or Rmax0.4~Rmax64 or Rz0.025~Rz1.6.
4. plunger pump chamber structure according to claim 1, which is characterized in that the plunger cavity further includes turbulent section, institute
It states turbulent section and has and be recessed the curved wall to be formed away from pistons work section direction, the side wall of the curved wall and pistons work section connects
It connects.
5. plunger pump chamber structure according to claim 4, which is characterized in that the pump housing be also provided with pump out channel and
It is pumped into channel, the axis setting for pumping out channel and being connected to plunger cavity and pumping out channel offset pistons work section is described to be pumped into
Channel is connected to plunger cavity and is pumped into the axis setting of channel offset pistons work section.
6. plunger pump chamber structure according to claim 4, which is characterized in that described to pump out passage axis and pistons work
The axial line distance of section is 0.1mm~50mm, the axial line distance for being pumped into passage axis and pistons work section be 0.1mm~
50mm, it is described to pump out channel and be pumped into channel both ends and be respectively present rounded corner, the rounding radii are as follows: 0.05mm~1.5mm.
7. plunger pump chamber structure according to claim 4, which is characterized in that the curved wall and the pistons work section
Side wall between connected by escape, the groove width of the escape is 0.1mm~10mm.
8. plunger pump chamber structure according to claim 1, which is characterized in that the plunger cavity further includes that internal diameter is greater than institute
The empty avoiding section of pistons work section is stated, the empty avoiding section is connect with the second end of first arcwall, the side wall of the empty avoiding section
Annular groove is offered, the annular groove is embedded with block piece.
9. plunger pump chamber structure according to claim 1, which is characterized in that the plunger cavity further includes guide section, institute
The one end for stating the side wall of guide section is connect with joining section.
10. plunger pump chamber structure according to claim 9, which is characterized in that the guide section includes straight walls and
Two arcwalls, the both ends of second arcwall are separately connected the second end of straight walls and the first arcwall, the straight walls with
The axis of pistons work section is parallel, and the first end of second arcwall and the second end of the first arcwall are tangent, and described second
The second end of arcwall and straight walls are tangent.
11. plunger pump chamber structure according to claim 9, which is characterized in that the guide section includes skew wall, third arc
Shape wall and straight walls, second end, skew wall, third arcwall and the straight walls of first arcwall are sequentially connected, the straight line
Wall is parallel with the axis of pistons work section, first arcwall and skew wall, skew wall and third arcwall, third arcwall and straight
Line wall difference is tangent.
12. plunger pump chamber structure according to claim 9, which is characterized in that the plunger cavity further includes that internal diameter is greater than
The empty avoiding section of the pistons work section, the both ends of the guide section are separately connected joining section and empty avoiding section, the side of the empty avoiding section
Wall offers annular groove, and the annular groove is embedded with block piece.
13. described in any item plunger pump chamber structures according to claim 1~12, which is characterized in that the number of the plunger cavity
Amount at least two.
14. a kind of medical plunger pump, which is characterized in that described including the described in any item chamber structures of claim 1-13
Piston component is slideably equipped in plunger cavity, the piston component includes push rod and piston；
The piston includes the sealing being close to the side wall of the pistons work section and connects in the joining section and the push rod
The joint portion of conjunction.
15. plunger pump according to claim 14, which is characterized in that the joint portion includes at least two claw,
One end of the claw is connect with sealing, and the other end of the claw extends along the direction for deviateing sealing axis, it is described extremely
Few two claws form engaging chamber after closing up；
One end of the push rod is equipped in the joining section and the clamping portion for engaging chamber cooperation and being connected and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707158.6U CN208416912U (en) | 2018-05-10 | 2018-05-10 | A kind of medical plunger pump and its chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707158.6U CN208416912U (en) | 2018-05-10 | 2018-05-10 | A kind of medical plunger pump and its chamber structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208416912U true CN208416912U (en) | 2019-01-22 |
Family
ID=65115097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820707158.6U Withdrawn - After Issue CN208416912U (en) | 2018-05-10 | 2018-05-10 | A kind of medical plunger pump and its chamber structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN208416912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397381A (en) * | 2018-05-10 | 2018-08-14 | 惠州海卓科赛医疗有限公司 | A kind of medical plunger pump and its chamber structure |
-
2018
- 2018-05-10 CN CN201820707158.6U patent/CN208416912U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397381A (en) * | 2018-05-10 | 2018-08-14 | 惠州海卓科赛医疗有限公司 | A kind of medical plunger pump and its chamber structure |
| CN108397381B (en) * | 2018-05-10 | 2019-08-27 | 惠州海卓科赛医疗有限公司 | A kind of medical plunger pump and its chamber structure |
| US11135372B2 (en) | 2018-05-10 | 2021-10-05 | Huizhou Hydro Caresys Medical Co., Ltd. | Medical plunger pump and cavity structure thereof |
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