CN216044232U

CN216044232U - Plunger pump

Info

Publication number: CN216044232U
Application number: CN202122482009.9U
Authority: CN
Inventors: 唐宇阳; 孙亚威
Original assignee: Hepis Technology Shenzhen Co ltd
Current assignee: Yangpu Medical Technology Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-15
Anticipated expiration: 2031-10-14

Abstract

The utility model relates to a plunger pump, which comprises a base, a driving assembly arranged on the base, a sensing assembly used for detecting the position of a liquid suction assembly, and the liquid suction assembly capable of performing linear reciprocating movement on the base; a liquid suction cavity communicated with the liquid inlet end of the base is arranged in the base; one end of the imbibing component penetrates into the imbibing cavity, and the other end of the imbibing component is connected with the driving component; the sensing assembly is arranged on the driving assembly; this scheme adopts the cooperation of lead screw motor and guide rail and slider to realize the rectilinear sliding for the sliding seat can drive the common reciprocating motion of plunger when the motion, and then changes the volume size in imbibition chamber, passes through the liquid volume that the pipeline connects the extraction with the change plunger pump, realizes accurate liquid flow control and absorbs liquid, and the precision is high, and is small, and is with low costs, and installation space is little, is favorable to biomedical instrument's installation and use.

Description

Plunger pump

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a plunger pump.

Background

The plunger pump is a positive displacement reciprocating pump with flow adjustable in dynamic and static states, and performs reciprocating motion in the liquid suction cavity through the plunger, so that the volume of the sealed liquid suction cavity is changed, fluid conveying is realized, and the plunger pump is common fluid conveying equipment.

Plunger pumps are commonly used in high pressure or high precision applications. For example, in biomedical devices, precision plunger pumps are commonly used for precise fluid flow control, or as negative pressure pumps to draw fluids. However, the existing plunger pump has a complex structure, so that the whole volume is large, a biomedical instrument is required to be provided with a large installation space for installation, the cost is high, and the use is not facilitated.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is that the existing plunger pump is large in size and high in cost, and the plunger pump is provided aiming at the defects in the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: constructing a plunger pump, which comprises a base, a driving assembly arranged on the base, a liquid suction assembly capable of performing linear reciprocating movement on the base, and a sensing assembly for detecting the position of the liquid suction assembly; a liquid suction cavity communicated with the liquid inlet end of the base is arranged in the base; one end of the liquid suction assembly penetrates into the liquid suction cavity, and the other end of the liquid suction assembly is connected with the driving assembly; the sensing assembly is disposed on the driving assembly.

Further, the base is composed of a substrate and a cavity body; the cavity body is arranged at the head end of the substrate; the liquid suction cavity is arranged in the cavity body.

Furthermore, a pipeline joint is arranged at the liquid inlet end of the cavity body; one end of the liquid suction cavity is provided with an opening, and the other end of the liquid suction cavity is communicated with the external space through the pipeline joint.

Further, the wicking assembly includes a slide mount; the sliding seat is connected with the base plate through a sliding piece.

Further, the sliding piece comprises a guide rail arranged on the base plate and a sliding block connected with the sliding seat; the sliding block is connected to the guide rail in a sliding mode.

Further, the wicking assembly also includes a plunger; the sliding seat is provided with a first mounting frame; one end of the plunger is arranged on the first mounting frame, and the other end of the plunger penetrates into the liquid suction cavity.

Furthermore, a sealing ring is arranged on the side wall of the opening; the plunger penetrates through the sealing ring.

Further, a second mounting frame is arranged at the tail end of the base plate; the driving assembly is a power piece arranged on the second mounting frame; the power part is connected with the sliding seat.

Further, the power part comprises a screw rod motor arranged on the second mounting frame and a nut connected with the sliding seat; the nut is sleeved on a rotating shaft of the screw rod motor.

Further, the sensing assembly comprises a sensing piece and a sensor; the induction sheet is arranged on the sliding seat; the sensor is disposed on the second mounting bracket.

The utility model has the beneficial effects that: drive assembly drive imbibition subassembly for the imbibition subassembly can carry out linear reciprocating motion on the base, and the cooperation response subassembly, and then realize accurate liquid flow control and absorb liquid, the precision is high, and is small, and installation space is little, and is with low costs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:

fig. 1 is a schematic structural view of a plunger pump according to an embodiment of the present invention;

FIG. 2 is a schematic top view of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 2 in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of a plunger pump according to an embodiment of the present invention in a state of maximum volume;

fig. 5 is a schematic diagram illustrating a minimum volume state of a plunger pump according to an embodiment of the present invention.

In the figure, 1, a drive assembly; 2. an inductive component; 3. a wicking assembly; 4. a base; 11. a screw motor; 12. a nut; 21. an induction sheet; 22. a sensor; 31. a sliding seat; 32. a guide rail; 33. a slider; 34. a plunger; 35. a first mounting bracket; 41. a substrate; 42. a cavity body; 43. a liquid suction chamber; 45. a pipe joint; 46. a seal ring; 47. a second mounting bracket.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

Example one

As shown in fig. 1 to 3, the embodiment of the present invention provides a plunger pump, which comprises a base 4, a driving assembly 1 disposed on the base 4, a sensing assembly 2 for detecting the position of a pipetting assembly 3, and the pipetting assembly 3 capable of performing linear reciprocating movement on the base 4; a liquid suction cavity 43 communicated with the liquid inlet end of the base 4 is arranged in the base 4; one end of the imbibing component 3 penetrates into the imbibing cavity 43, and the other end is connected with the driving component 1; the sensing assembly 2 is disposed on the driving assembly 1.

The liquid suction unit 3 is driven by the driving unit 1 to reciprocate linearly on the base 4 and further reciprocate in the liquid suction chamber 43, thereby changing the volume of the sealed liquid suction chamber 43 to carry the fluid. The amount of liquid pumped by the plunger 34 can be changed by only changing the volume of the liquid suction cavity 43. The sensing assembly 2 senses the position of the wicking assembly 3 as an indication of the start of the movement. The liquid flow control and the liquid suction are realized accurately, the precision is high, the size is small, the installation space is small, and the cost is low.

In a further embodiment, the base 4 is composed of a substrate 41 and a hollow body 42; the cavity body 42 is arranged at the head end of the substrate 41; the liquid suction chamber 43 is provided in the hollow body 42. A pipeline joint 45 is arranged at the liquid inlet end of the cavity body 42; the liquid suction chamber 43 has an opening at one end and communicates with the outside space through a pipe joint 45 at the other end.

The hollow body 42 is fixedly connected to the head end of the base plate 41 by means of screws or the like, and can be supplied with liquid from the outside through the pipe joint 45 into the liquid suction chamber 43, or can be discharged from the liquid suction chamber 43 to the outside through the pipe joint 45. The walls of the opening are smaller than the diameter of the liquid chamber 43.

In a further embodiment, wicking assembly 3 includes a slide mount 31; the sliding seat 31 is connected with the base plate 41 through a sliding piece. The sliding part comprises a guide rail 32 arranged on the base plate 41 and a sliding block 33 connected with the sliding seat 31; the slider 33 is slidably connected to the guide rail 32. Pipetting assembly 3 further comprises plunger 34; the sliding seat 31 is provided with a first mounting frame 35; the plunger 34 is provided at one end on the first mounting bracket 35 and at the other end penetrates into the aspirating chamber 43. A sealing ring 46 is arranged on the side wall of the opening; the plunger 34 passes through the seal 46.

The sliding seat 31 is fixedly connected with the sliding block 33 through parts such as screws, the guide rail 32 is fixedly connected with the substrate 41 through parts such as screws, and the sliding block 33 can slide along the guide rail 32 to further drive the sliding seat 31 to reciprocate together. The closed space enclosed by the pipeline joint 45, the hollow cavity 42, the sealing ring 46 and the plunger 34 is the liquid suction cavity 43, and the amount of liquid pumped by the plunger 34 through the pipeline joint 45 can be changed only by changing the size of the liquid suction cavity 43. The sliding seat 31 is fixedly connected with the plunger 34, so that when the sliding seat 31 moves, the plunger 34 can be driven to reciprocate together, and the size of the liquid suction cavity 43 is changed, so that the liquid amount pumped by the plunger 34 through the pipeline joint 45 is changed.

Further, pipeline joint 45 is adorned on cavity body 42 inlet end for the interface is sealed, is equipped with the recess on the opening lateral wall, and sealing washer 46 is fixed in the recess, with the gap complete seal between opening and plunger 34.

In a further embodiment, the base plate 41 is provided with a second mounting bracket 47 at the end; the driving assembly 1 is a power member arranged on the second mounting frame 47; the power member is connected with the sliding seat 31. The power part comprises a screw rod motor 11 arranged on the second mounting frame 47 and a nut 12 connected with the sliding seat 31; the nut 12 is sleeved on the rotating shaft of the screw motor 11.

By adopting the matching of the screw rod motor 11 and the nut 12 and the threaded connection between the screw rod motor 11 and the nut 12, when the screw rod motor 11 rotates, the nut 12 is driven to reciprocate, so that the sliding seat 31 drives the sliding block 33 to slide along the guide rail 32, and further drives the plunger 34 to reciprocate, and external liquid is pumped into the liquid suction cavity 43 through the pipeline joint 45, or the liquid in the liquid suction cavity 43 is discharged outside through the pipeline joint 45. The screw motor 11 is matched with the linear guide rail 32, so that the precision is high.

In a further embodiment, the sensing assembly 2 comprises a sensing piece 21 and a sensor 22; the induction sheet 21 is arranged on the sliding seat 31; the sensor 22 is arranged on the second mounting bracket 47.

The sensing piece 21 is fixedly connected to the sliding seat 31 by a part such as a screw, and reciprocates together with the sliding seat 31, so that the sensing piece 21 can enter a sensing range of the sensor 22 as a movement starting point mark. Wherein the sensor 22 is a photosensor. As shown in fig. 4 to 5, when the sensor 22 detects the sensing piece 21, the plunger 34 is in the maximum volume state; when the nut 12 moves to the end of the rotating shaft of the lead screw motor 11, the plunger 34 pump is in a minimum volume state.

The embodiment adopts the screw motor 11 to match with the guide rail 32 and the sliding block 33 to realize linear driving, realizes accurate liquid flow control and liquid suction, has high precision, simple integral structure, small volume, low cost and small installation space, and is favorable for the installation and the use of biomedical instruments.

Example two

The second embodiment of the present invention provides a plunger pump, which is different from the first embodiment in that: the seal ring 46 is integrated with the hollow body 42, the pipe joint 45 is integrated with the hollow body 42, the plunger 34, the sliding seat 31, the slider 33, the sensor sheet 21 and the nut 12 are integrated, and the guide rail 32 and the base plate 41 are integrated.

In another embodiment, the power member may also be replaced with a cylinder.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.

Claims

1. A plunger pump, characterized by: the liquid suction device comprises a base, a driving assembly arranged on the base, a liquid suction assembly capable of performing linear reciprocating movement on the base, and a sensing assembly for detecting the position of the liquid suction assembly; a liquid suction cavity communicated with the liquid inlet end of the base is arranged in the base; one end of the liquid suction assembly penetrates into the liquid suction cavity, and the other end of the liquid suction assembly is connected with the driving assembly; the sensing assembly is disposed on the driving assembly.

2. The plunger pump of claim 1, wherein the base is comprised of a base plate and a hollow body; the cavity body is arranged at the head end of the substrate; the liquid suction cavity is arranged in the cavity body.

3. The plunger pump according to claim 2, characterized in that a pipeline joint is arranged on the liquid inlet end of the cavity; one end of the liquid suction cavity is provided with an opening, and the other end of the liquid suction cavity is communicated with the external space through the pipeline joint.

4. The plunger pump of claim 3 wherein said wicking assembly comprises a slide block; the sliding seat is connected with the base plate through a sliding piece.

5. The plunger pump of claim 4, wherein the runner includes a guide rail disposed on the base plate, and a slider coupled to the slide shoe; the sliding block is connected to the guide rail in a sliding mode.

6. The plunger pump of claim 4 wherein said wicking assembly further comprises a plunger; the sliding seat is provided with a first mounting frame; one end of the plunger is arranged on the first mounting frame, and the other end of the plunger penetrates into the liquid suction cavity.

7. The plunger pump of claim 6, wherein a sealing ring is provided on the side wall of the opening; the plunger penetrates through the sealing ring.

8. The plunger pump of claim 4, wherein the base plate is provided with a second mounting bracket at a distal end thereof; the driving assembly is a power piece arranged on the second mounting frame; the power part is connected with the sliding seat.

9. The plunger pump of claim 8, wherein the power member comprises a lead screw motor disposed on the second mounting bracket, and a nut coupled to the sliding seat; the nut is sleeved on a rotating shaft of the screw rod motor.

10. The plunger pump of claim 8, wherein the sensing assembly comprises a sensing plate and a sensor; the induction sheet is arranged on the sliding seat; the sensor is disposed on the second mounting bracket.