CN113027736A

CN113027736A - Infusion pump

Info

Publication number: CN113027736A
Application number: CN202110543009.7A
Authority: CN
Inventors: 肖立峰; 陈洪伟
Original assignee: Chutianyuanchuang Biotechnology Changsha Co ltd
Current assignee: Chutianyuanchuang Biotechnology Changsha Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-06-25
Anticipated expiration: 2041-05-19
Also published as: CN113027736B

Abstract

The utility model provides an infusion pump, including first pump case, the second pump case, the main shaft, and balance subassembly, the opposite side of first pump case and second pump case is equipped with first pipeline storage tank and the second pipeline storage tank that is used for centre gripping elasticity pipeline respectively, be equipped with first bearing frame and second bearing frame on the main shaft, balance subassembly is including locating the first balance on the first bearing frame and locating the second balance on the second bearing frame, be equipped with the first convex part with first pipeline storage tank complex on the first balance, be equipped with the second convex part with second pipeline storage tank complex on the second balance, have the interval between first balance and the second balance, if the central line of first balance is L₁The central line of the second swinging plate is L₂The axis of rotation of the main shaft is L₃Then L is₁、L₂Are respectively connected with L₃Intersect and L₁And L₂Is a straight line with different surfaces. The invention has simple and reliable structure, reduces the friction between the convex part and the corresponding elastic pipeline and eliminates the elasticityFriction of the inner wall of the pipeline, the service life of the pump is prolonged, and the like.

Description

Infusion pump

Technical Field

The invention relates to a liquid pump, in particular to an infusion pump.

Background

A pump is a machine that delivers or pressurizes a liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, causing the liquid energy to increase. The pump is widely used for conveying liquid such as water, oil, acid-base liquid, emulsion, suspension emulsion, liquid metal and the like, and can also be used for conveying liquid, gas mixture and liquid containing suspended solids. Conventional pumps include centrifugal pumps, diaphragm pumps, piston pumps, peristaltic pumps, and the like. In the fields of chemical industry, food, pharmacy, bioengineering and the like, the pump has higher requirements on flow pulsation and flow precision, the traditional pump can not completely meet the requirements, and the product quality can not be ensured in use. The traditional peristaltic pump (pipeline pump) sucks or discharges liquid through moving a dead point of a pipeline, has the characteristics of convenience in cleaning and disinfection and low cost, but has the defects of short service life, poor flow state and the like due to large stress and easy fatigue of the dead point of the pipeline.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the infusion pump which has a simple and reliable structure, is beneficial to reducing the friction between the convex part and the corresponding elastic pipeline, eliminating the friction on the inner wall of the elastic pipeline and prolonging the service life of the pump.

In order to solve the technical problems, the invention adopts the following technical scheme:

an infusion pump comprises a first pump shell, a second pump shell, a main shaft and a swinging plate assembly, wherein a first pipeline accommodating groove and a second pipeline accommodating groove which are used for clamping an elastic pipeline are respectively formed in opposite sides of the first pump shell and the second pump shell, a first bearing seat and a second bearing seat are arranged on the main shaft, the swinging plate assembly comprises a first swinging plate arranged on the first bearing seat and a second swinging plate arranged on the second bearing seat, a first convex part matched with the first pipeline accommodating groove is arranged on the first swinging plate, a second convex part matched with the second pipeline accommodating groove is arranged on the second swinging plate, a space is formed between the first swinging plate and the second swinging plate, and if the central line of the first swinging plate is L-shaped₁The central line of the second swinging plate is L₂The rotation axis of the main shaft is L₃Then L is₁、L₂Are respectively connected with L₃Intersect and L₁And L₂Is a straight line with different surfaces.

As a further improvement of the above technical solution: the phase difference between the flow pulse formed by the first swinging plate extruding the elastic pipeline and the flow pulse formed by the second swinging plate extruding the elastic pipeline is 90 degrees.

As a further improvement of the above technical solution: the central point of the surface S1 of the first convex part extruding the elastic pipeline is O₁， L₁And L₃Cross point of (a) and O₁The center point of the surface S2 of the second convex part extruding the elastic pipeline is O₂，L₂And L₃Cross point of (a) and O₂And (4) overlapping.

As a further improvement of the above technical solution: the main shaft is provided with a first supporting backing ring and a second supporting backing ring which are mutually abutted, one surface of the first supporting backing ring, which is in contact with the first swinging plate, is arranged in parallel with the first swinging plate, and one surface of the second supporting backing ring, which is in contact with the second swinging plate, is arranged in parallel with the second swinging plate.

As a further improvement of the above technical solution: the width of two ends of the first pipeline accommodating groove is smaller than that of the middle section, and the depth of the two ends is larger than that of the middle section; the width of the two ends of the second pipeline accommodating groove is smaller than that of the middle section, and the depth of the two ends is larger than that of the middle section.

As a further improvement of the above technical solution: the first pipeline accommodating groove and the second pipeline accommodating groove respectively comprise two C-shaped grooves which are oppositely arranged, and one elastic pipeline is arranged in each C-shaped groove.

As a further improvement of the above technical solution: the liquid inlet end of each elastic pipeline is communicated with the liquid inlet collecting cavity, and the liquid outlet end of each elastic pipeline is communicated with the liquid outlet collecting cavity.

As a further improvement of the above technical solution: and check valves are respectively arranged between the liquid inlet end of the elastic pipeline and the liquid inlet collecting cavity and between the liquid outlet end of the elastic pipeline and the liquid outlet collecting cavity.

As a further improvement of the above technical solution: the check valve comprises a valve body, a first channel and a second channel which are arranged in the valve body, and an elastic membrane which is positioned between the first channel and the second channel, wherein a push rod is arranged in the first channel, the push rod is connected with the elastic membrane, and a plurality of liquid outlet holes are formed in the outlet of the second channel.

As a further improvement of the above technical solution: and a transmission key is arranged between the second bearing seat and the main shaft.

Compared with the prior art, the invention has the advantages that: the invention discloses an infusion pump, wherein a first wobble plate and a second wobble plate of a wobble plate component are not integrally arranged on a main shaft, but a first bearing seat and a second bearing seat are arranged on the main shaft, the first wobble plate and the second wobble plate are arranged on the first bearing seat and the second bearing seat at intervals, the first wobble plate and the second wobble plate are not contacted any more, when the main shaft rotates, the first wobble plate and the second wobble plate swing around the respective central line around the intersection point of the rotating axis of the main shaft (similar to a conical pendulum), the first wobble plate and a first pipeline accommodating groove are matched with each other to extrude a corresponding elastic pipeline, and the second wobble plate and a second pipeline accommodating groove are matched with each other to extrude a corresponding elastic pipeline, so that the friction between a convex part and the corresponding elastic pipeline is reduced, the friction of the inner wall of the elastic pipeline is eliminated, the service life of the elastic pipeline is prolonged, particles in the elastic pipeline are prevented, and balls are not required to be arranged on the first wobble plate and the second wobble plate, the structure of the wobble plate assembly can be simplified, the inclination angles of the first wobble plate and the second wobble plate relative to the main shaft do not need to be kept consistent, the first wobble plate and the second wobble plate can be flexibly selected, and L₁And L₂The first wobble plate and the second wobble plate rotate at angles to realize phase difference compensation, so that the flow of the pump is more uniform, and the pump runs more stably.

Drawings

Fig. 1 is a schematic cross-sectional view of an infusion pump according to a first aspect of the present invention.

Fig. 2 is a schematic cross-sectional view of an infusion pump according to a second aspect of the present invention.

Fig. 3 is a perspective view of a wobble plate assembly of the present invention from a first perspective.

Fig. 4 is a perspective view of the wobble plate assembly of the present invention from a second perspective.

Fig. 5 is a schematic cross-sectional view of the wobble plate assembly of the present invention.

Fig. 6 is a perspective view of the first pump housing or the second pump housing in the present invention.

Fig. 7 is an exploded view of the main shaft, the first bearing housing and the second bearing housing of the present invention.

Fig. 8 is a schematic structural view of the open state of the check valve in the present invention.

Fig. 9 is a schematic perspective view of the liquid inlet collecting cavity, the liquid outlet collecting cavity and the elastic pipeline in the invention.

Fig. 10 is a schematic flow pulse-phase diagram of a first flexible conduit in accordance with the present invention.

Fig. 11 is a schematic flow pulse-phase diagram of a second flexible conduit according to the present invention.

Fig. 12 is a schematic flow pulse-phase diagram of a third flexible conduit in accordance with the present invention.

Fig. 13 is a schematic flow pulse-phase diagram of a fourth flexible conduit in accordance with the present invention.

Fig. 14 is a pulse-phase diagram of the flow after the flexible pipes are collected.

Fig. 15 is a partially enlarged view of fig. 2.

The reference numerals in the figures denote: 1. a first pump casing; 11. a first pipeline accommodating groove; 12. a liquid inlet; 13. a liquid outlet; 2. a second pump casing; 21. a second pipeline accommodating groove; 3. a main shaft; 31. a first bearing housing; 32. a second bearing housing; 33. a motor; 34. a drive key; 35. a first support grommet; 36. a second support grommet; 4. a wobble plate assembly; 41. a first convex portion; 42. a second convex portion; 43. a first wobble plate; 44. a second wobble plate; 5. an elastic conduit; 51. a first elastic tube; 52. a second elastic tube; 53. a third elastic tube; 54. a fourth flexible conduit; 6. a one-way valve; 61. a valve body; 62. a first channel; 63. a second channel; 65. an elastic diaphragm; 66. a top rod; 67. a liquid outlet hole; 7. a C-shaped groove; 81. a liquid inlet collection cavity; 82. a liquid outlet collection cavity; 91. a first limit ring; 92. a second stop collar; 93. a first bearing; 94. a second bearing.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

FIGS. 1 to 15 showAn embodiment of the infusion pump of the present invention is described, the infusion pump of this embodiment includes a first pump housing 1, a second pump housing 2, a main shaft 3, and a wobble plate assembly 4, opposite sides of the first pump housing 1 and the second pump housing 2 are respectively provided with a first pipeline receiving groove 11 and a second pipeline receiving groove 21 for clamping an elastic pipeline 5, the main shaft 3 is provided with a first bearing seat 31 and a second bearing seat 32, the wobble plate assembly 4 includes a first wobble plate 43 disposed on the first bearing seat 31 and a second wobble plate 44 disposed on the second bearing seat 32, the first wobble plate 43 is provided with a first protrusion 41 engaged with the first pipeline receiving groove 11, the second wobble plate 44 is provided with a second protrusion 42 engaged with the second pipeline receiving groove 21, a gap is provided between the first wobble plate 43 and the second wobble plate 44, if a center line of the first wobble plate 43 is L₁The central line of the second wobble plate 44 is L₂The axis of rotation of the spindle 3 is L₃Then L is₁、L₂Are respectively connected with L₃Intersect and L₁And L₂Is a straight line with different surfaces. The main shaft 3 can be driven to rotate by a common motor 33 and the like, for example, the first bearing seat 31 and the main shaft 3 can rotate synchronously by adopting a shaft hole matching mode, the second bearing seat 32 and the main shaft 3 can rotate synchronously by adopting a transmission key 34, and a fastening piece is arranged at one end of the main shaft 3 far away from the motor 33 to fix the second bearing seat 32 on the main shaft 3, so that the infusion pump can be conveniently disassembled, assembled and maintained.

In the infusion pump, the first wobble plate 43 and the second wobble plate 44 of the wobble plate assembly 4 are not integrally installed on the main shaft 3, but the main shaft 3 is provided with the first bearing seat 31 and the second bearing seat 32, the first wobble plate 43 and the second wobble plate 44 are installed on the first bearing seat 31 and the second bearing seat 32 at intervals, the first wobble plate 43 and the second wobble plate 44 are not contacted any more, and when the main shaft 3 rotates, the first wobble plate 43 and the second wobble plate 44 respectively use the respective central lines L₁、L₂Axis of rotation L with the main shaft₃The first wobble plate 43 and the first pipeline accommodating groove 11 are matched to extrude the corresponding elastic pipeline 5, the second wobble plate 44 and the second pipeline accommodating groove 21 are matched to extrude the corresponding elastic pipeline 5, friction between the convex parts and the corresponding elastic pipeline 5 is reduced, friction between the upper inner wall and the lower inner wall of each elastic pipeline 5 is eliminated, and the elastic pipe is improvedThe service life of way 5 prevents that the inside particle that produces of elastic conduit 5 to also need not to set up bowl dress on first balance 43 and second balance 44 and cave in and install the ball, can simplify balance subassembly 4's structure, the inclination of first balance 43 and second balance 44 relative main shaft 3 also need not to keep unanimous simultaneously, can select in a flexible way, thereby further reduce the compensation angle, it is more even to make the flow, the pump operation is more steady, L₁、L₂Are respectively connected with L₃Intersect and L₁And L₂Is a heterofacial straight line, i.e. L₁And L₂The first wobble plate 43 and the second wobble plate 44 are not parallel or intersected, and the swing angle of the first wobble plate and the second wobble plate can realize compensation of 90 degrees, so that the flow of the pump is more uniform, and the operation is more stable.

Further, the phase difference between the flow pulse formed by the first wobble plate 43 pressing the elastic tube 5 and the flow pulse formed by the second wobble plate 44 pressing the elastic tube 5 is 90 °. Referring to fig. 9 to 14 in detail, in this embodiment, each of the upper first pipe receiving groove 11 and the lower second pipe receiving groove 21 includes two C-shaped grooves 7 arranged oppositely, the two C-shaped grooves 7 on the upper side are respectively provided with a first elastic pipe 51 and a second elastic pipe 52, the two C-shaped grooves 7 on the lower side are respectively provided with a third elastic pipe 53 and a fourth elastic pipe 54, the first swing disk 43 alternately presses the first elastic pipe 51 and the second elastic pipe 52, the phases of the flow pulses generated by the first elastic pipe 51 and the second elastic pipe 52 are different by 180 °, the second swing disk 44 alternately presses the third elastic pipe 53 and the fourth elastic pipe 54, the phases of the flow pulses generated by the third elastic pipe 53 are different by 180 °, the phases of the flow pulses generated by the same second elastic pipe 52 and the same fourth elastic pipe 54 are also different by 90 °, after the four elastic pipelines 5 are converged (the liquid inlet end is converged in the liquid inlet converging cavity 81, and the liquid outlet end is converged in the liquid outlet converging cavity 82), more continuous (or shorter flow pulse interval time) and more uniform (or smaller difference between wave crests and wave troughs) flow can be output. For example, the first wobble plate 43 may be arranged obliquely in the left-right direction, and the second wobble plate 44 may be arranged obliquely in the front-back direction (i.e., obliquely in the direction perpendicular to the paper), but in other embodiments, the relative positions of the first wobble plate 43 and the second wobble plate 44 may be kept unchanged, and the whole may be rotated around the main shaft 3 by a certain angle.

Referring to fig. 15, further, the center point of the surface S1 where the first protrusion 41 presses the elastic tube 5 is O₁，L₁And L₃Cross point of (a) and O₁The center point of the surface S2 where the second protrusion 42 presses the elastic tube 5 is O₂，L₂And L₃Cross point of (a) and O₂And (4) overlapping. When the main shaft 3 rotates, the first wobble plate 43 and the second wobble plate 44 only swing and extrude the elastic pipeline 5, and friction between the upper inner wall and the lower inner wall of the elastic pipeline 5 can be further reduced.

As a preferable technical solution, the main shaft 3 is provided with a first supporting backing ring 35 and a second supporting backing ring 36 which are mutually abutted, one surface of the first supporting backing ring 35, which is far away from the second supporting backing ring 36, is arranged in parallel with the first wobble plate 43 (specifically, the upper surface is arranged in parallel with the first wobble plate 43), and one surface of the first supporting backing ring 35, which is abutted against the second supporting backing ring 36, is arranged in parallel with the L₃Perpendicular (specifically lower surface and L)₃Vertical); the surface of the second support backing ring 36 away from the first support backing ring 35 is arranged in parallel with the second wobble plate 44 (specifically, the lower surface is arranged in parallel with the second wobble plate 44), and the surface abutting against the first support backing ring 35 is arranged in parallel with the L₃Perpendicular (specifically upper surface and L)₃Vertical). Preferably, a first limit ring 91 is respectively arranged on the first bearing seat 31 and the second bearing seat 32, and a first bearing 93 is respectively arranged between the first pump shell 1 and the first limit ring 91 on the first bearing seat 31 and between the second pump shell 2 and the first limit ring 91 on the second bearing seat 32, so that the first bearing seat 31 and the second bearing seat 32 can rotate relative to the first pump shell 1 and the second pump shell 2; second limit rings 92 are respectively arranged on the first wobble plate 43 and the second wobble plate 44, and second bearings 94 are respectively arranged between the first support cushion ring 35 and the second limit ring 92 on the first wobble plate 43 and between the second limit ring 92 on the first wobble plate 43 and the first limit ring 91 on the first bearing seat 31, so that the first wobble plate 43 is supported; between the second supporting backing ring 36 and the second limit ring 92 on the second wobble plate 44, and between the second limit ring 92 on the second wobble plate 44 and the second bearing seatAnd a second bearing 94 is respectively arranged between the first limiting rings 91 on the second swinging plate 32, so that the second swinging plate 44 is supported, the structure is simple and reliable, and the first swinging plate 43 and the second swinging plate 44 are ensured to periodically extrude the elastic pipeline 5.

Further, in this embodiment, the widths of the two ends of the first pipeline accommodating groove 11 are smaller than the width of the middle section, and the depths of the two ends are greater than the depth of the middle section; the width of both ends of the second pipeline accommodating groove 21 is smaller than the width of the middle section and the depth of both ends is larger than the depth of the middle section. The elastic tube 5 is disposed in the first tube receiving groove 11 and the second tube receiving groove 21, and when being pressed by the first protrusion 41 and the second protrusion 42, a pressure difference is more easily formed in the fluid in the elastic tube 5, and the fluid is rapidly sucked and discharged. At the same time, the special space formed by the first protrusion 41 and the second protrusion 42 is beneficial to prolonging the service life of the elastic pipe 5.

In the preferred embodiment, the check valves 6 are respectively disposed between the liquid inlet end of the elastic pipe 5 and the liquid inlet collecting cavity 81, and between the liquid outlet end of the elastic pipe 5 and the liquid outlet collecting cavity 82. The liquid in the elastic pipeline 5 is conveniently controlled to flow according to the designed direction through the one-way valve 6.

Further, in this embodiment, the check valve 6 includes a valve body 61, a first channel 62 and a second channel 63 disposed in the valve body 61, and an elastic membrane 65 located between the first channel 62 and the second channel 63, a push rod 66 is disposed in the first channel 62, the push rod 66 is connected to the elastic membrane 65, and a plurality of liquid outlet holes 67 are disposed at an outlet of the second channel 63. The check valve 6 with the structure has the advantages that when the liquid flows from the first channel 62 to the second channel 63, the elastic membrane 65 is pressed and deformed to effectively cover each liquid outlet hole 67 and effectively prevent the liquid from flowing through; when the liquid flows from the second channel 63 to the first channel 62, the elastic membrane 65 is pressed and deformed under the action of the ejector rod 66, the installation position of the elastic membrane 65 is kept still, the liquid can smoothly flow into the first channel 62, and after the liquid completely passes through, the elastic membrane 65 is restored to the initial state, so that the structure is simple and reliable.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. An infusion pump, comprising a first pump housing (1), a second pump housing (2), a main shaft (3), and a wobble plate assembly (4), the first pump housing (1) and the second pump The opposite sides of the shell (2) are respectively provided with a first pipe accommodating groove (11) and a second pipe accommodating groove (21) for holding the elastic pipe (5). A first bearing seat (31) and a second bearing seat (32) are provided, and the wobble plate assembly (4) includes a first wobble plate (43) arranged on the first bearing seat (31) and a first wobble plate (43) arranged on the first bearing seat (31). A second wobble plate (44) on the second bearing seat (32), the first wobble plate (43) is provided with a first convex portion ( 41), the second pendulum plate (44) is provided with a second convex portion (42) that cooperates with the second pipe accommodating groove (21), the first pendulum plate (43) and the first pendulum plate (43). There is a distance between the two wobble plates (44), if the center line of the first wobble plate (43) is L ₁ , the center line of the second wobble plate (44) is L ₂ , and the main shaft (3) The axis of rotation of L 3 is L ₃ , then L ₁ and L ₂ intersect with L ₃ respectively, and L ₁ and L ₂ are straight lines of different planes.

2. The infusion pump according to claim 1, characterized in that: the flow pulse formed by the first wobble plate (43) extruding the elastic pipe (5) and the second wobble plate (44) extruding the elastic pipe (5) The phase difference between the formed flow pulses is 90°.

_3. The infusion pump according to claim 1, characterized in that: the center point of the surface S1 on which the first convex portion (41) presses the elastic pipe ( ₅ ) is O1, the intersection _of L1 and L3 and the O ₁ coincides, the center point of the surface S2 on which the second convex portion (42) presses the elastic pipe (5) is O ₂ , and the intersection of L ₂ and L ₃ coincides with O ₂ .

4. The infusion pump according to claim 1, characterized in that: the main shaft (3) is provided with a first support backing ring (35) and a second support backing ring (36) that abut against each other, and the first support backing ring (35) and the second backing backing ring (36) The surface of a support ring (35) in contact with the first wobble plate (43) is arranged in parallel with the first wobble plate (43), and the second support ring (36) is in contact with the second wobble plate (44) One side is arranged in parallel with the second wobble plate (44).

5. The infusion pump according to any one of claims 1 to 4, characterized in that: the width of both ends of the first pipeline accommodating groove (11) is smaller than the width of the middle section and the depth of both ends is greater than the depth of the middle section; The width of both ends of the second pipe accommodating groove (21) is smaller than the width of the middle section and the depth of both ends is greater than the depth of the middle section.

6. The infusion pump according to any one of claims 1 to 4, characterized in that: the first pipeline accommodating groove (11) and the second pipeline accommodating groove (21) both comprise two oppositely arranged C-shaped grooves (7), each of the C-shaped grooves (7) is provided with one of the elastic pipes (5).

7. The infusion pump according to claim 6, characterized in that it further comprises a liquid inlet collecting chamber (81) and a liquid outlet collecting chamber (82), and the liquid inlet end of each elastic pipe (5) is connected to the liquid inlet and outlet. The liquid collecting chamber (81) is communicated with, and the liquid outlet end is communicated with the liquid outlet collecting chamber (82).

8. The infusion pump according to claim 7, characterized in that: between the liquid inlet end of the elastic pipe (5) and the liquid inlet collecting chamber (81), and the liquid outlet end and the liquid outlet collecting chamber (82) Check valves (6) are respectively arranged therebetween.

9 . The infusion pump according to claim 8 , wherein the one-way valve ( 6 ) comprises a valve body ( 61 ), a first channel ( 62 ) and a second channel provided in the valve body ( 61 ). 10 . (63), and an elastic diaphragm (65) located between the first channel (62) and the second channel (63), the first channel (62) is provided with a push rod (66), the push rod (66) is connected to the elastic diaphragm (65), and a plurality of liquid outlet holes (67) are provided at the outlet of the second channel (63).

10. The infusion pump according to any one of claims 1 to 4, wherein a transmission key (34) is provided between the second bearing seat (32) and the main shaft (3).