Pump head of peristaltic pump

Abstract

The utility model discloses a peristaltic pump head which comprises a base plate, a movable block and a pump wheel assembly, the movable block is located on one side of the base plate, the pump wheel assembly is located on the other side of the base plate, the movable block is in sliding contact with the base plate, the pump wheel assembly comprises a main shaft, shaft discs, a plurality of overpressure idler wheels and a plurality of non-overpressure idler wheels, the shaft discs are arranged on the two sides of the main shaft, and the overpressure idler wheels are arranged on the shaft discs. An overpressure roller and a non-overpressure roller are arranged between the shaft discs on the two sides, a mounting groove is formed in the base plate, and a screw is arranged in the mounting groove. According to the pump head of the peristaltic pump, the motor is adopted to drive the screw to rotate to drive the movable block to move, the precision of the peristaltic pump can be conveniently controlled, the non-overpressure rolling wheel is arranged on the peristaltic pump head, overpressure extrusion on a pump pipe of the peristaltic pump is avoided, extra abrasion to the pump pipe of the peristaltic pump is avoided, the fatigue strength of the pump pipe is greatly relieved, and the service life of the pump pipe is prolonged. And the pulse intensity can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to peristaltic pump technical field especially relates to a peristaltic pump pump head. BACKGROUND

[0002] Peristaltic pump is composed of three parts: driver, pump head and pump pipe. Fluid is isolated in pump pipe, and pump pipe can be quickly replaced. Peristaltic pump is like squeezing a pump pipe full of fluid with fingers, and fluid in the pipe moves forward as fingers slide forward. Peristaltic pump is also this principle, but it is replaced by rollers instead of fingers. Fluid is pumped by alternately squeezing and releasing the elastic delivery pump pipe. Just like squeezing the pump pipe with two fingers, negative pressure is formed in the pipe as fingers move, and liquid flows accordingly.

[0003] The existing peristaltic pump head movable block and clamp seat are provided with pump pipe, the movable block and the clamp seat clamp the pump pipe, the roller rotates to realize the function of squeezing the pump pipe, and the delivery of fluid is completed. When replacing the pump pipe, the movable block on the pump head needs to be moved, since the step of moving the movable block is manually operated, the clamping gap between the movable block and the clamp seat is prone to errors of different degrees when clamping the pump pipe, thereby affecting the precision of peristaltic pump control. Moreover, peristaltic pump operation generates pulse, and the method of reducing pulse intensity is to increase the number of rollers. Increasing the number of rollers under the same speed increases the frequency of squeezing the pump pipe, which accelerates the wear of the pump pipe and reduces the service life of the pump pipe. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a peristaltic pump pump head, adopts motor drive screw rotation and moves movable block, is convenient for peristaltic pump control precision, is provided with non overpressure roller in peristaltic pump head, does not overpressure squeeze peristaltic pump pump pipe, will not produce additional wear to peristaltic pump pump pipe, also greatly relieves the fatigue strength of pump pipe, can also reduce pulse intensity.

[0005] In order to realize the above-mentioned purpose, the utility model provides a peristaltic pump pump head, including base plate, movable block, pump wheel assembly, movable block is located one side of base plate, pump wheel assembly is located the other side of base plate, movable block and base plate slide contact, pump wheel assembly includes main shaft, axle disc, a plurality of overpressure roller, a plurality of non overpressure roller, both sides of main shaft are equipped with axle disc, and both sides axle disc are equipped with overpressure roller and non overpressure roller, be equipped with screw rod in installation slot on base plate.

[0006] Preferably, the overpressure roller and the non overpressure roller are each provided with 3, and the overpressure roller and the non overpressure roller are alternately arranged on the axle disc.

[0007] Preferably, the outer diameters of the three overpressure rollers form a normal working circle, and the outer diameters of the three non overpressure rollers form a working circle with a smaller inner diameter than the normal working circle.

[0008] Preferably, the substrate is provided with a set of mounting blocks on both sides, each set of mounting blocks is provided with a guide rod, the guide rod penetrates through the two sides of the movable block respectively, and the movable block is in sliding contact with the guide rod.

[0009] Preferably, one end of the screw rod is rotatably connected with the inner wall of the mounting groove, the other end of the screw rod penetrates through the side wall of the mounting groove and extends to the outside of the side wall of the mounting groove, and the one end of the screw rod extending to the outside of the side wall of the mounting groove is provided with a motor, and the output end of the motor is connected with the one end of the screw rod.

[0010] Preferably, the inner side of the movable block is provided with a moving block, and the moving block is threadedly connected with the screw rod.

[0011] Preferably, the inner wall surface of the movable block is in sliding contact with the outer surface of the substrate.

[0012] Preferably, the side of the movable block close to the pump wheel assembly is arc-shaped.

[0013] Therefore, the peristaltic pump head adopts the motor to drive the screw rod to rotate and drive the movable block to move, so that the precision of the peristaltic pump can be controlled, the overpressure roller and the non-overpressure roller are arranged on the peristaltic pump head, the overpressure roller can realize the normal outlet pressure of the peristaltic pump, the non-overpressure roller can extrude the pump pipe to the theoretical pressure position, the peristaltic pump pipe is not over-pressed, so that the peristaltic pump pipe is not additionally abraded, the fatigue strength of the pump pipe is greatly relieved, the pulse intensity is reduced, the flow precision is improved, the service life of the pump pipe is prolonged during high-speed operation of the multi-roller pump head, and the problem is solved without increasing any part, the structure is simple, and the multi-roller pump head of any structure is applicable.

[0014] The technical scheme of the utility model is further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic view of the peristaltic pump head of the utility model;

[0016] Figure 2 is the pump wheel assembly schematic view in the peristaltic pump head of the utility model;

[0017] Figure 3 is the normal working circle schematic view in the peristaltic pump head of the utility model;

[0018] Figure 4 is the overpressure roller and non-overpressure roller extrusion difference schematic view in the peristaltic pump head of the utility model;

[0019] Figure 5 is the mounting groove side view in the peristaltic pump head of the utility model.

[0020] REFERENCE NUMERALS

[0021] 1. Main shaft; 2. Shaft disc; 3. Overpressure roller; 4. Non-overpressure roller; 5. Motor; 6. Base plate; 7. Guide rod; 8. Movable block; 9. Pump wheel assembly; 10. Mounting block; 11. Mounting groove; 12. Screw; 13. Normal working ring; 14. Working ring; 15. Moving block. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Example

[0025] like Figure 1 As shown, a peristaltic pump head includes a base plate 6, a movable block 8, and a pump wheel assembly 9. The movable block 8 is located on one side of the base plate 6, and the pump wheel assembly 9 is located on the other side of the base plate 6. The movable block 8 is in slidable contact with the base plate 6. The side of the movable block 8 closest to the pump wheel assembly 9 is arc-shaped to facilitate the installation of the pump tube. A set of mounting blocks 10 is provided on both the upper and lower sides of the base plate 6. Each set of mounting blocks 10 has a guide rod 7. Each set of mounting blocks 10 has two mounting blocks 10, and the guide rod 7 is positioned between the two mounting blocks 10. The structure and installation principle between the guide rod 7 and the mounting block 10 adopt existing technology. The guide rod 7 passes through both sides of the movable block 8, and the movable block 8 is in slidable contact with the guide rod 7. The movable block 8 can slide on the guide rod 7.

[0026] A mounting groove is provided on the substrate 6, and a screw 12 is provided inside the mounting groove. One end of the screw 12 is rotatably connected to the inner wall of the mounting groove, and the other end passes through the side wall of the mounting groove and extends to the outside of the side wall of the mounting groove. A motor 5 is provided at the end of the screw 12 extending to the outside of the side wall of the mounting groove, and the output end of the motor 5 is connected to one end of the screw 12. Figure 5As shown, the inner side of the movable block 8 is provided with a moving block 15, and the moving block 15 is threadedly connected with the screw rod 12. The inner wall surface of the movable block 8 is in sliding contact with the outer surface of the base plate 6. The motor 5 is started to drive the screw rod 12 to rotate, and the screw rod 12 drives the moving block 15 to move on the screw rod 12, so that the gap distance between the movable block 8 and the pump wheel assembly 9 can be adjusted, and the pump pipe is convenient to disassemble and assemble. The movement of the movable block 8 is controlled by the motor 5, compared with manually moving the movable block 8, the displacement of the movable block 8 is more convenient to control, and the pump pipe flow accuracy is improved.

[0027] As shown in Figure 2 The pump wheel assembly 9 comprises a main shaft 1, an axle disc 2, a plurality of overpressure rollers 3 and a plurality of non-overpressure rollers 4. The main shaft 1 is provided with the axle disc 2 on both sides, and the overpressure rollers 3 and the non-overpressure rollers 4 are arranged between the two axle discs 2. The overpressure rollers 3 and the non-overpressure rollers 4 are arranged alternately on the axle disc 2.

[0028] As shown in Figure 3 and Figure 4 The outer diameters of the three overpressure rollers 3 form a normal working circle 13, and the outer diameters of the three non-overpressure rollers 4 form a working circle 14 smaller than the inner diameter of the normal working circle 13. Thus, the two adjacent rollers form a squeezing difference, the overpressure roller 3 can realize the normal outlet pressure of the peristaltic pump, and the non-overpressure roller 4 can squeeze the pump pipe to the theoretical pressure position. The pump pipe of the peristaltic pump is not over-pressed and squeezed, so that the pump pipe of the peristaltic pump will not be additionally abraded, the fatigue strength of the pump pipe is greatly relieved, the pulse intensity is reduced, and the flow accuracy is improved. The service life of the pump pipe during high-speed operation of the multi-roller pump head is prolonged. The structure is simple without adding any parts, and the multi-roller pump head is suitable for any structure.

[0029] Therefore, the peristaltic pump head is driven by the motor to rotate the screw rod to drive the movable block to move, so that the peristaltic pump precision is convenient to control. The non-overpressure roller is arranged on the peristaltic pump head, the pump pipe of the peristaltic pump is not over-pressed and squeezed, the pump pipe of the peristaltic pump will not be additionally abraded, the fatigue strength of the pump pipe is greatly relieved, and the pulse intensity is reduced.

[0030] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents, and these modifications or replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A peristaltic pump head characterized by: The utility model relates to a pump wheel assembly, movable block and substrate, the movable block is located one side of the substrate, the pump wheel assembly is located the other side of the substrate, the movable block and the substrate slide contact, the pump wheel assembly includes the main shaft, the axle disc, a plurality of overpressure rollers, a plurality of non-overpressure rollers, both sides of the main shaft are equipped with the axle disc, and the overpressure roller and the non-overpressure roller are equipped between both sides axle disc, the substrate is equipped with the installation groove, and the installation groove is equipped with the screw rod.

2. A peristaltic pump head as claimed in claim 1, wherein: The overpressure roller and the non-overpressure roller are all equipped with 3, and the overpressure roller and the non-overpressure roller are alternately arranged on the axle disc.

3. A peristaltic pump head as claimed in claim 2, wherein: The outer diameter of 3 overpressure rollers constitutes a normal working circle, and the outer diameter of 3 non-overpressure rollers constitutes a working circle smaller than the inner diameter of the normal working circle.

4. A peristaltic pump head as claimed in claim 1, wherein: The substrate is equipped with a group of mounting blocks on the upper and lower sides, each group of mounting blocks is equipped with a guide rod, the guide rod penetrates through both sides of the movable block respectively, and the movable block and the guide rod slide contact.

5. A peristaltic pump head as claimed in claim 1, wherein: One end of the screw rod is rotatably connected with the inner wall of the installation groove, and the other end of the screw rod penetrates through the side wall of the installation groove and extends to the outside of the side wall of the installation groove, one end of the screw rod extending to the outside of the side wall of the installation groove is equipped with a motor, and the output end of the motor is connected with one end of the screw rod.

6. A peristaltic pump head as claimed in claim 1, wherein: The movable block is equipped with a moving block on the inner side, and the moving block is threadedly connected with the screw rod.

7. A peristaltic pump head as claimed in claim 1, wherein: The inner wall surface of the movable block and the outer surface of the substrate slide contact.

8. A peristaltic pump head as claimed in claim 1, wherein: The side of the movable block close to the pump wheel assembly is arc-shaped.

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