CN214859975U - Infusion pump shell - Google Patents

Abstract

The utility model discloses an infusion pump casing, including the pump case subassembly, be equipped with the pipeline storage tank that is used for centre gripping elasticity pipeline on the pump case subassembly, the degree of depth that the width at pipeline storage tank both ends is less than the width in middle section and both ends is greater than the degree of depth in middle section. The utility model has the advantages of simple structure, reliability, fast absorption and discharge of liquid after being beneficial to the compression of the elastic pipeline, and prolonged service life of the elastic pipeline.

Description

Infusion pump shell

Technical Field

The utility model relates to a liquid pump especially relates to an infusion pump casing.

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.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure, reliable, be favorable to elastic conduit to absorb fast behind the pressurized and discharge liquid to prolong elastic conduit's life's transfer pump casing.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the infusion pump shell comprises a pump shell assembly, wherein a pipeline accommodating groove used for clamping an elastic pipeline is formed in the pump shell assembly, the width of two ends of the pipeline accommodating groove is smaller than that of the middle section, and the depth of the two ends of the pipeline accommodating groove is larger than that of the middle section.

As a further improvement of the above technical solution: the pump shell assembly comprises a first pump shell and a second pump shell which are oppositely arranged, and the pipeline accommodating groove comprises a first pipeline accommodating groove arranged on one side, close to the second pump shell, of the first pump shell and a second pipeline accommodating groove arranged on one side, close to the first pump shell, of the second pump shell.

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.

As a further improvement of the above technical solution: the first pump shell and the second pump shell are arranged oppositely up and down.

As a further improvement of the above technical solution: and a plurality of limiting bulges used for preventing the elastic pipeline from moving are arranged in the first pipeline accommodating groove and the second pipeline accommodating groove.

As a further improvement of the above technical solution: from the middle part to the two ends of the limiting bulge, the width of the limiting bulge is gradually increased.

Compared with the prior art, the utility model has the advantages of: present pipeline storage tank depth everywhere and width are unanimous basically, are unfavorable for arranging to form pressure differential after the elastic conduit wherein receives the extrusion, and influence elastic conduit's life, the utility model discloses an infusion pump casing, the width at inside pipeline storage tank both ends is less than the degree of depth that the width at middle section and the degree of depth at both ends are greater than the middle section, and the elastic conduit receives when the extrusion inside fluid more easily forms pressure differential, quick imbibition and discharge liquid. Meanwhile, the test proves that the special space formed by the pipeline containing groove and the convex parts of the structure is beneficial to prolonging the service life of the elastic pipeline.

Drawings

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

Fig. 2 is a schematic cross-sectional view of the infusion pump at a second viewing angle according to the present invention.

Fig. 3 is a schematic perspective view of a first view angle of the wobble plate assembly according to the present invention.

Fig. 4 is a schematic perspective view of a second viewing angle of the wobble plate assembly according to the present invention.

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

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

Fig. 7 is a front view of the first pump casing or the second pump casing in the infusion pump casing of the present invention.

Fig. 8 is a view a-a of fig. 7.

Fig. 9 is a schematic top view of the first pump casing or the second pump casing in the infusion pump casing of the present invention.

Fig. 10 is an exploded schematic view of the main shaft, the first bearing seat and the second bearing seat according to the present invention.

Fig. 11 is a schematic structural view of the open state of the check valve according to the present invention.

Fig. 12 is a schematic perspective view of the inlet liquid collection chamber, the outlet liquid collection chamber and the elastic pipeline according to the present invention.

Fig. 13 is a schematic diagram of the flow pulse-phase of each elastic tube according to the present invention.

Fig. 14 is a schematic diagram of the flow pulse-phase after the flexible pipes according to the present invention 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; 71. a limiting bulge; 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; 10. a pump housing assembly; 20. a pipeline accommodating groove.

Detailed Description

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

Fig. 1 to 14 show an embodiment of an infusion pump according to the present invention, which comprises a first pump casing 1, a second pump casing 2, the main shaft 3 and the wobble plate assembly 4, opposite sides of the first pump case 1 and the second pump case 2 are respectively provided with a first pipeline accommodating groove 11 and a second pipeline accommodating groove 21 for clamping the elastic pipeline 5 (the first pump case 1 and the second pump case 2 are arranged oppositely up and down, the corresponding first pipeline accommodating groove 11 is arranged at the lower side of the first pump case 1, the second pipeline accommodating groove 21 is arranged at the upper side of the second pump case 2, of course, in other embodiments, other arrangement modes are also available), the main shaft 3 is provided with a first bearing seat 31 and a second bearing seat 32, the wobble plate assembly 4 comprises a first wobble plate 43 arranged on the first bearing seat 31 and a second wobble plate 44 arranged on the second bearing seat 32, and the first wobble plate 43 is provided with an elastic component.A first protrusion 41 engaged with the first pipeline receiving groove 11, a second protrusion 42 engaged with the second pipeline receiving groove 21 is provided on the second wobble plate 44, a distance is provided between the first wobble plate 43 and the second wobble plate 44, if the 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 spindle 3 can be driven to rotate by a common motor 33 and the like, for example, the first bearing seat 31 and the spindle 3 can rotate synchronously by adopting a shaft hole matching mode, the second bearing seat 32 and the spindle 3 can rotate synchronously by adopting a transmission key 34, and a fastening piece is arranged at one end of the spindle 3, which is far away from the motor 33, so that the second bearing seat 32 is fixed on the spindle 3, and the infusion pump housing can be conveniently disassembled 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 intersection point swing (similar to the conical pendulum), the elastic pipeline 5 corresponding to the first swing disk 43 and the first pipeline containing groove 11 in a matched extrusion manner, the elastic pipeline 5 corresponding to the second swing disk 44 and the second pipeline containing groove 21 in a matched extrusion manner, the friction between the convex part and the corresponding elastic pipeline 5 is reduced, the friction between the upper inner wall and the lower inner wall of each elastic pipeline 5 is eliminated, the service life of the elastic pipeline 5 is prolonged, particles are prevented from being generated inside the elastic pipeline 5, bowl-shaped recesses and balls are not required to be arranged on the first swing disk 43 and the second swing disk 44, the structure of the swing disk assembly 4 can be simplified, meanwhile, the inclination angles of the first swing disk 43 and the second swing disk 44 relative to the main shaft 3 are not required to be kept consistent, the selection can be flexibly carried out, the compensation angle is further reduced, the flow is more uniform, the pump operation is more stable, and L is₁、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.

In this embodiment, the width of the two ends of the first pipeline accommodating groove 11 is smaller than the width of the middle section, and the depth of the two ends is greater than the depth of the middle section; the width of the two ends of the second pipeline accommodating groove 21 is less than the width of the middle section and the depth of the two ends is greater than the depth of the middle section, as shown in fig. 6 to 9, the width d of the two ends of the pipeline accommodating groove₂Width d less than the middle section₁Depth h at both ends₂Depth h greater than the middle section₁. The depth and the width of the existing pipeline accommodating groove are basically consistent, the elastic pipeline 5 arranged in the pipeline accommodating groove is not beneficial to forming pressure difference after being extruded, the service life of the elastic pipeline 5 is influenced, the elastic pipeline 5 is arranged in the first pipeline accommodating groove 11 and the second pipeline accommodating groove 21, and when the elastic pipeline is extruded by the first convex part 41 and the second convex part 42, the fluid in the elastic pipeline 5 is more easily formed into pressure difference, and the liquid is quickly absorbed and discharged. Meanwhile, test verification shows that the special space formed by the pipeline accommodating groove 20, the first convex part 41 and the second convex part 42 is beneficial to prolonging the service life of the elastic pipeline 5.

Further, in the present embodiment, a plurality of limiting protrusions 71 for preventing the elastic pipe 5 from moving are disposed in the first pipe receiving groove 11 and the second pipe receiving groove 21. The limiting bulge 71 is arranged to prevent the elastic pipeline 5 from moving in the first pipeline accommodating groove 11 and the second pipeline accommodating groove 21, so that the reliability of the infusion pump shell is further improved.

As a further preferred embodiment, the width of the limiting protrusion 71 gradually increases from the middle to both ends of the limiting protrusion 71, or the portion of the limiting protrusion 71 located at the bottom of the pipe receiving groove 20 is narrower, and the portion located at both side walls of the pipe receiving groove 20 is wider. Tests show that the limiting bulge 71 with the structure has a better limiting effect on the elastic pipeline 5.

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. 12 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 opposite C-shaped grooves 7, the two upper C-shaped grooves 7 are respectively provided with a first elastic pipe 51 and a second elastic pipe 52, the two lower C-shaped grooves 7 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 51 and 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.

Preferably, the main shaft 3 is provided with a first support backing ring 35 and a second support backing ring 36 which are abutted against each other, and the first support backing ring 35 is far away from the second support backing ringOne surface of the support 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 the surface abutting against the second support backing ring 36 is arranged in parallel with 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; second bearings 94 are respectively arranged between the second supporting cushion ring 36 and a second limit ring 92 on the second wobble plate 44, and between the second limit ring 92 on the second wobble plate 44 and a first limit ring 91 on the second bearing seat 32, so that the second wobble plate 44 is supported, the structure is simple and reliable, and the elastic pipeline 5 is periodically extruded by the first wobble plate 43 and the second wobble plate 44.

As preferred technical scheme, the utility model relates to an infusion pump, the feed liquor end and the feed liquor of elastic pipeline 5 collect between the chamber 81 and go out the liquid end and go out the liquid and collect and be equipped with check valve 6 between the chamber 82 respectively. The liquid in the elastic pipeline 5 is conveniently controlled to flow according to the designed direction through the one-way valve 6.

Further, the utility model relates to an infusion pump, check valve 6 include the valve body 61, locate first passageway 62 and the second passageway 63 in the valve body 61 and be located the elastic diaphragm 65 between first passageway 62 and the second passageway 63, are equipped with ejector pin 66 in the first passageway 62, and ejector pin 66 links to each other with elastic diaphragm 65, and second passageway 63 exit is equipped with a plurality of liquid holes 67. 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 limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (6)

1. The utility model provides an infusion pump casing, includes pump case subassembly (10), be equipped with pipeline storage tank (20) that are used for centre gripping elasticity pipeline (5) on pump case subassembly (10), its characterized in that: the width of the two ends of the pipeline accommodating groove (20) is smaller than that of the middle section, and the depth of the two ends is larger than that of the middle section.

2. The infusion pump housing of claim 1, wherein: the pump shell assembly (10) comprises a first pump shell (1) and a second pump shell (2) which are oppositely arranged, and the pipeline accommodating groove (20) comprises a first pipeline accommodating groove (11) which is formed in one side, close to the second pump shell (2), of the first pump shell (1) and a second pipeline accommodating groove (21) which is formed in one side, close to the first pump shell (1), of the second pump shell (2).

3. The infusion pump housing of claim 2, wherein: the first pipeline accommodating groove (11) and the second pipeline accommodating groove (21) respectively comprise two C-shaped grooves (7) which are oppositely arranged.

4. The infusion pump housing of claim 2 or 3, wherein: the first pump shell (1) and the second pump shell (2) are arranged oppositely up and down.

5. The infusion pump housing of claim 2 or 3, wherein: a plurality of limiting bulges (71) used for preventing the elastic pipeline (5) from moving are arranged in the first pipeline containing groove (11) and the second pipeline containing groove (21).

6. The infusion pump housing of claim 5, wherein: the width of the limiting bulge (71) is gradually increased from the middle part to the two ends of the limiting bulge (71).

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