Ball type peristaltic pump

Abstract

The invention discloses a ball type peristaltic pump which comprises a pump head, an inner mounting cavity is formed in the pump head, and two mounting holes communicated with the inner mounting cavity are further formed in the pump head; the pump core assembly comprises a rotating core body, a supporting rotating sleeve and a plurality of extrusion rotors, clamping parts are arranged on the two sides of the rotating core body, the rotating core body is rotatably sleeved with the supporting rotating sleeve, the supporting rotating sleeve is located between the clamping parts on the two sides, and the extrusion rotors are clamped between the clamping parts on the two sides and abut against the supporting rotating sleeve; a pump pipe; wherein the rotating core body is rotatably arranged in the mounting inner cavity, the pump pipe extends into the mounting inner cavity and surrounds the outer portion of the rotating core body, the balls abut against the pump pipe, and the two ends of the pump pipe extend out of the mounting inner cavity through the corresponding mounting holes. Abrasion generated by extruding the rotor is reduced, so that the use reliability of the peristaltic pump is improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of micro water pumps, and in particular to a ball-type peristaltic pump. Background Art

[0002] Peristaltic pump is a commonly used liquid delivery device. It has good stability during liquid delivery and is widely used in the field of liquid delivery that requires accurate quantitative and micro-flow rate. Compared with traditional roller peristaltic pump, ball peristaltic pump has significant advantages such as miniaturization, low wear and high precision, and has great development potential and application prospects.

[0003] In the core technology of ball-type peristaltic pump, the fixing and retention of the ball as the extrusion unit is very critical and directly affects the performance of the peristaltic pump. Chinese patent announcement number CN 116857161 A discloses a peristaltic pump and its assembly method, wherein the ball in the peristaltic pump is arranged on a rotating core, and the rotating core is provided with a mounting groove to install the ball to support the rotation of the ball, so as to achieve the dispersion of the extrusion force on the ball into multiple extrusion force points.

[0004] However, in actual use, as the use time increases, the previous single-point extrusion force is dispersed into multiple extrusion force points. Although the problem of single-point extrusion force wear is better alleviated, it still cannot be completely avoided. In the long-term use process, each ball still produces a single-point extrusion on the ball and wears out and fails, resulting in a decrease in the reliability of the peristaltic pump. In view of this, how to design a technology to improve the reliability of the peristaltic pump is a technical problem to be solved by the present invention. Summary of the invention

[0005] The invention provides a ball-type peristaltic pump, which can reduce the wear of an extrusion rotor, thereby improving the use reliability of the peristaltic pump and extending its service life.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: The present invention provides a ball peristaltic pump, comprising: A pump head, wherein an installation inner cavity is formed inside the pump head, and the pump head is also provided with two installation holes communicating with the installation inner cavity; A pump core assembly, the pump core assembly comprising a rotating core, a supporting rotating sleeve and a plurality of extrusion rotors, the rotating core is provided with clamping parts on both sides, the inner wall of the clamping parts is provided with a plurality of positioning grooves, the positioning grooves form an arc-shaped concave surface matching the extrusion rotors, the supporting rotating sleeve is rotatably sleeved on the rotating core and is located between the clamping parts on both sides, the extrusion rotors are clamped between the clamping parts on both sides and abut against the supporting rotating sleeve; Pump tube; Wherein, the rotating core is rotatably arranged in the installation inner cavity, the pump tube extends into the installation inner cavity and surrounds the outside of the rotating core, the ball rests on the pump tube, and the two ends of the pump tube extend to the outside of the installation inner cavity through the corresponding installation holes.

[0007] Furthermore, an annular groove is provided on the outer peripheral surface of the rotating core, and the supporting rotating sleeve is located in the annular groove.

[0008] Furthermore, a plurality of supporting balls are arranged in the annular groove, and the supporting rotating sleeve is sleeved on the outside of the supporting balls.

[0009] Furthermore, a mounting sleeve is provided in the annular groove, and the mounting sleeve is located in the annular groove; the supporting ball is located between the mounting sleeve and the supporting sleeve.

[0010] Furthermore, it also includes a sealing ring, which is provided with a through hole. The sealing ring is located between the two clamping parts and is sleeved on the outside of the supporting rotating sleeve; the extrusion rotor passes through the corresponding through hole and contacts with the supporting rotating sleeve.

[0011] Furthermore, the clamping parts on both sides form a filling cavity between the sealing ring and the supporting rotating sleeve, and the filling cavity is filled with grease.

[0012] Furthermore, limiting protrusions are respectively provided on the two inner side walls of the installation inner cavity, the limiting protrusions are arranged on the outer side of the rotating core, and the pump tube is located between the limiting protrusions on both sides.

[0013] Furthermore, the limiting protrusion is a ring-shaped structure.

[0014] Furthermore, a flexible buffer block is also provided inside the installation cavity, and the flexible buffer block is located between the two installation holes, and the flexible buffer block is configured to apply pressure to the extrusion rotor.

[0015] Furthermore, the pump head is provided with a first axial hole communicating with the installation inner cavity, and the rotating core is provided with a second axial hole; Support bearings are respectively arranged on both sides of the rotating core, the support bearings, the first shaft hole and the second shaft hole are coaxially arranged, and the support bearings are arranged in the installation inner cavity.

[0016] The technical solution of the present invention has the following technical effects compared with the prior art: by configuring a supporting rotating sleeve in the pump core assembly, the supporting rotating sleeve is sleeved on the rotating core and located between the clamping parts on both sides, and the supporting rotating sleeve is used to support the extrusion rotor clamped between the clamping parts. Since the supporting rotating sleeve can rotate relative to the rotating core, during use, the rotating core drives the extrusion rotor to rotate to squeeze the pump tube in the installation cavity. During the extrusion process, the extrusion rotor will rotate and then drive the supporting rotating sleeve in contact with it to rotate relative to the rotating core. In this way, the relative friction between the extrusion rotor and the supporting rotating sleeve can be reduced. The supporting rotating sleeve effectively supports the extrusion rotor and effectively reduces the wear of the extrusion rotor, thereby improving the reliability of the peristaltic pump and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the structural principle diagrams of an embodiment of a ball-type peristaltic pump of the present invention; Figure 2 This is the second structural principle diagram of an embodiment of a ball-type peristaltic pump of the present invention; Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A area; Figure 4 for Figure 1 Partial structural principle diagram of the ball peristaltic pump; Figure 5 for Figure 4 Middle BB section view.

[0018] Reference numerals: 1. Pump head; 11. Mounting hole; 12. Limiting protrusion; 2. Pump core assembly; 21. Rotating core; 22. Extruding rotor; 23. Flexible buffer block; 24. Supporting rotating sleeve; 25. Supporting ball; 26. Mounting sleeve; 27. Sealing ring; 211, clamping portion; 212, positioning groove; 213, annular groove; 3. Pump tube; 4. Support bearing. DETAILED DESCRIPTION

[0019] The ball peristaltic pump provided in the present application generally includes a pump head, a rotating core, an extrusion rotor and a pump tube. The rotating core can rotate inside the pump head. The extrusion rotor is arranged on the rotating core and can rotate with the rotating core to squeeze the pump tube passing through the pump head. The pump tube is constantly squeezed by the extrusion rotor so that the liquid in the pump tube flows continuously, thereby achieving the effect of pumping liquid.

[0020] like Figure 1-Figure 5As shown, the present application provides a ball peristaltic pump, comprising: A pump head 1, wherein a mounting inner cavity is formed inside the pump head 1, and the pump head 1 is also provided with two mounting holes 11 communicating with the mounting inner cavity; A pump core assembly 2, the pump core assembly 2 comprising a rotating core 21, a supporting rotating sleeve 24 and a plurality of ball rotors, the rotating core 21 being provided with clamping portions 211 on both sides, the inner wall of the clamping portion 211 being provided with a plurality of positioning grooves 212, the positioning grooves 212 forming an arc-shaped concave surface matching the ball rotor, the supporting rotating sleeve 24 being rotatably sleeved on the rotating core 21 and being located between the clamping portions 211 on both sides, the ball rotor being clamped between the clamping portions 211 on both sides and being located in the corresponding positioning grooves 212, and the ball rotor being against the supporting rotating sleeve 24; Pump tube 3; Among them, the rotating core 21 is rotatably arranged in the installation inner cavity, the pump tube 3 extends into the installation inner cavity and surrounds the outside of the rotating core 21, the ball rests on the pump tube 3, and the two ends of the pump tube 3 extend to the outside of the installation inner cavity through the corresponding mounting holes 11.

[0021] Specifically, the ball rotor is mounted on the rotating core 21 and is clamped in the positioning groove 212 formed by the clamping portion 211. The arc-shaped concave surface formed by the positioning groove 212 can meet the requirements for the rotation of the ball rotor. During the rotation of the ball rotor during the extrusion pump tube 3, the inner side of the ball rotor needs to be supported. In the present application, the rotating core 21 uses a rotatable supporting rotating sleeve 24 to support the ball rotor.

[0022] In actual use, after the rotating core 21 is driven by external power to rotate in the installation cavity, the rotating core 21 can drive the ball rotor to rotate together, and then use the ball rotor to squeeze the pump tube 3 in the installation cavity of the pump head 1 to drive the liquid in the pump tube 3 to flow. In the process of the ball rotor rotating relative to the pump tube 3 and squeezing the pump tube 3, the ball rotor will also rotate relative to the rotating core 21. At this time, the ball rotor is simultaneously acted upon by the pump tube 3 and the supporting rotating sleeve 24, and the rotating ball rotor will drive the supporting rotating sleeve 24 to rotate relative to the rotating core 21, thereby generating static friction between the supporting rotating sleeve 24 and the ball rotor so that the two rotate in opposite directions, thereby reducing the relative rotation between the ball rotor and the supporting rotating sleeve 24.

[0023] In this way, after long-term use, the relative friction between the ball rotor and the supporting rotating sleeve 24 is relatively small, so the wear of the ball rotor can be effectively reduced to extend the service life of the ball rotor.

[0024] Furthermore, an annular groove 213 is provided on the outer peripheral surface of the rotating core 21 , and the supporting rotating sleeve 24 is located in the annular groove 213 .

[0025] Specifically, an annular groove 213 is provided on the outer circumferential surface of the rotating core 21, and the internal space of the rotating core 21 is used to install the supporting rotating sleeve 24, so as to meet the design requirements of compact structure and miniaturization. On the one hand, the supporting rotating sleeve 24 installed in the annular groove 213 can meet the requirements of rotating around the axis of the rotating core 21, and on the other hand, the supporting rotating sleeve 24 can be limited in the axial direction by the annular groove 213 to ensure that the supporting rotating sleeve 24 can rotate smoothly on the rotating core 21.

[0026] Furthermore, a plurality of supporting balls 25 are disposed in the annular groove 213 , and the supporting rotating sleeve 24 is sleeved on the outside of the supporting balls 25 .

[0027] Specifically, in order to reduce the friction generated between the support rotating sleeve 24 and the rotating core 21 during rotation, the support rotating sleeve 24 is installed using support balls 25. The support balls 25 roll relatively when the support rotating sleeve 24 rotates, thereby ensuring that the support rotating sleeve 24 can rotate smoothly on the rotating core 21.

[0028] The annular groove 213 is also provided with a mounting sleeve 26, and the mounting sleeve 26 is located in the annular groove 213; the supporting ball 25 is located between the mounting sleeve 26 and the supporting sleeve. Specifically, the bottom of the annular groove 213 is shielded and protected by the mounting sleeve 26, and the mounting sleeve 26 can be made of wear-resistant material to reduce the wear of the rotating core 21 caused by the rolling of the supporting ball 25.

[0029] Furthermore, it also includes a sealing ring 27, which is provided with a through hole (not marked), and the sealing ring 27 is located between the two clamping parts 211 and is sleeved on the outside of the supporting rotating sleeve 24; the ball rotor passes through the corresponding through hole and contacts the supporting rotating sleeve 24.

[0030] Specifically, the through hole formed on the sealing ring 27 is used to meet the requirement that the ball rotor passes through the sealing ring 27 and contacts and supports the supporting rotating sleeve 24. In addition, since the sealing ring 27 is arranged on the outside of the supporting rotating sleeve 24, the sealing ring 27 can reduce the pollution of the supporting rotating sleeve 24 on the inside by the dirt on the outside, which may cause the ball rotor to rotate poorly relative to the supporting rotating sleeve 24.

[0031] Preferably, the clamping portions 211 on both sides form a filling cavity between the sealing ring 27 and the supporting rotating sleeve 24 , and the filling cavity is filled with grease.

[0032] Specifically, the clamping part 211 is in a circular ring structure on the outer circumference of the rotating core 21, and the two sides of the sealing ring 27 are tightly attached to the clamping part 211 on the corresponding side. A small gap is formed between the through hole on the sealing ring 27 and the ball rotor to ensure the smooth rotation of the ball rotor. In this way, the rotating core 21 forms a filling cavity between the clamping part 211 and the sealing ring 27 and the supporting rotating sleeve 24, and grease is filled in the filling cavity to play a role in lubricating the ball rotor and the supporting rotating sleeve 24. On the one hand, the sealing ring 27 can prevent external foreign matter from falling into the grease and affecting the lubrication effect. On the other hand, it can also prevent the grease from being thrown out to the outside of the sealing ring 27 during rotation and affecting the pump tube 3 in the installation cavity, and can also reduce the loss of grease.

[0033] Furthermore, limiting protrusions 12 are respectively provided on the two inner side walls of the installation inner cavity, and the limiting protrusions 12 are arranged on the outer side of the rotating core 21, and the pump tube 3 is located between the limiting protrusions 12 on both sides.

[0034] Specifically, during actual use, the pump tube 3 in the installation cavity will be continuously squeezed by the ball rotor. During the squeezing process, the pump tube 3 is easily displaced and stretched and deformed in the installation cavity, which leads to flow fluctuations. By setting limiting protrusions 12 on both sides of the installation cavity to limit the position of the pump tube 3, when the pump tube 3 is squeezed, the limiting protrusions 12 can limit the displacement of the pump tube 3 toward the side, and the squeezed part of the pump increases in width due to being compressed, so that the squeezed part of the pump tube 3 is pressed on the limiting protrusions 12 at the same time, and then the static friction generated between the limiting protrusions 12 and the pump tube 3 is used to limit the pump tube 3 from being stretched.

[0035] Compared with the solution of adding a positioning structure outside the pump tube 3 in the conventional technology, the structure of the pump tube 3 is effectively simplified, and during installation, the pump tube 3 can be accurately inserted into the pump head 1 through the guidance of the limiting protrusions 12 on both sides.

[0036] Wherein, the limiting protrusion 12 is a ring structure.

[0037] Furthermore, a flexible buffer block 23 is further disposed inside the mounting inner cavity. The flexible buffer block 23 is located between the two mounting holes 11 . The flexible buffer block 23 is configured to apply pressure to the ball rotor.

[0038] Specifically, since the pump tube 3 is output from the two mounting holes 11 to the outside of the mounting inner cavity, and the pump tube 3 is not arranged in the area between the two mounting holes 11 inside the mounting inner cavity, when the extrusion rotor 22 moves to a position where the pump tube 3 is not arranged, it is easy for the extrusion rotor 22 at this position to be not subjected to pressure, thereby causing uneven force on the rotating core 21. The flexible buffer block 23 is a porous structure, and grease is adsorbed in the flexible buffer block 23.

[0039] Furthermore, the pump head is provided with a first axial hole (not marked) communicating with the installation inner cavity, and the rotating core is provided with a second axial hole (not marked); Support bearings 4 are respectively arranged on both sides of the rotating core, the support bearings, the first shaft hole and the second shaft hole are coaxially arranged, and the support bearings are arranged in the installation inner cavity.

[0040] Specifically, support bearings 4 are respectively arranged on both sides of the rotating core, so that the rotating core can be installed in the pump head through the support bearings, and the support bearings are used to ensure that the rotating core can rotate reliably and smoothly in the pump head.

[0041] The technical solution of the present invention has the following technical effects compared with the prior art: by configuring a supporting rotating sleeve in the pump core assembly, the supporting rotating sleeve is sleeved on the rotating core and located between the clamping parts on both sides, and the supporting rotating sleeve is used to support the extrusion rotor clamped between the clamping parts. Since the supporting rotating sleeve can rotate relative to the rotating core, during use, the rotating core drives the extrusion rotor to rotate to squeeze the pump tube in the installation cavity. During the extrusion process, the extrusion rotor will rotate and then drive the supporting rotating sleeve in contact with it to rotate relative to the rotating core. In this way, the relative friction between the extrusion rotor and the supporting rotating sleeve can be reduced. The supporting rotating sleeve effectively supports the extrusion rotor and effectively reduces the wear of the extrusion rotor, thereby improving the reliability of the peristaltic pump and extending its service life.

[0042] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A ball peristaltic pump, characterized in that: include: A pump head, wherein an installation inner cavity is formed inside the pump head, and the pump head is also provided with two installation holes communicating with the installation inner cavity; A pump core assembly, the pump core assembly comprising a rotating core, a supporting rotating sleeve and a plurality of extrusion rotors, the rotating core is provided with clamping parts on both sides, the inner wall of the clamping parts is provided with a plurality of positioning grooves, the positioning grooves form an arc-shaped concave surface matching the extrusion rotors, the supporting rotating sleeve is rotatably sleeved on the rotating core and is located between the clamping parts on both sides, the extrusion rotors are clamped between the clamping parts on both sides and abut against the supporting rotating sleeve; Pump tube; Wherein, the rotating core is rotatably arranged in the installation inner cavity, the pump tube extends into the installation inner cavity and surrounds the outside of the rotating core, the ball rests on the pump tube, and the two ends of the pump tube extend to the outside of the installation inner cavity through the corresponding installation holes.

2. The ball peristaltic pump according to claim 1, characterized in that: An annular groove is arranged on the outer peripheral surface of the rotating core, and the supporting rotating sleeve is located in the annular groove.

3. The ball peristaltic pump according to claim 2, characterized in that: A plurality of supporting balls are arranged in the annular groove, and the supporting rotating sleeve is sleeved on the outside of the supporting balls.

4. The ball peristaltic pump according to claim 2, characterized in that: A mounting sleeve is also provided in the annular groove, and the mounting sleeve is located in the annular groove; the supporting ball is located between the mounting sleeve and the supporting sleeve.

5. The ball peristaltic pump according to claim 1, characterized in that: It also includes a sealing ring, which is provided with a through hole. The sealing ring is located between the two clamping parts and is sleeved on the outside of the supporting rotating sleeve; the extrusion rotor passes through the corresponding through hole and contacts with the supporting rotating sleeve.

6. The ball peristaltic pump according to claim 5, characterized in that: The clamping parts on both sides form a filling cavity between the sealing ring and the supporting rotating sleeve, and the filling cavity is filled with grease.

7. The ball peristaltic pump according to claim 1, characterized in that: Limiting protrusions are respectively arranged on the two inner side walls of the installation inner cavity, and the limiting protrusions are arranged on the outer side of the rotating core body. The pump pipe is located between the limiting protrusions on both sides.

8. The ball peristaltic pump according to claim 7, characterized in that: The limiting protrusion is an annular structure.

9. The ball peristaltic pump according to claim 1, characterized in that: A flexible buffer block is also disposed inside the installation inner cavity. The flexible buffer block is located between the two installation holes. The flexible buffer block is configured to apply pressure to the extrusion rotor.

10. The ball peristaltic pump according to claim 1, characterized in that: The pump head is provided with a first axial hole communicating with the installation inner cavity, and the rotating core is provided with a second axial hole; Support bearings are respectively arranged on both sides of the rotating core, the support bearings, the first shaft hole and the second shaft hole are coaxially arranged, and the support bearings are arranged in the installation inner cavity.

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