High-flow peristaltic pump

Abstract

The utility model discloses a high-flow peristaltic pump, which belongs to the technical field of peristaltic pumps and comprises a driving motor, a shell, a hose and an extrusion mechanism, the extrusion mechanism is positioned in the shell, an output shaft of the driving motor penetrates through the shell and is connected with the extrusion mechanism, the hose is bent and embedded between the extrusion mechanism and the inner wall of the shell, and two ends of the hose penetrate out of the upper side of the shell; the extrusion mechanism comprises a gear shaft, a gear carrier and a plurality of driven gears, the gear shaft is installed in the center of the gear carrier, the driven gears are evenly distributed on the gear carrier along the axis of the gear shaft and meshed with the gear shaft, and the driven gears make contact with the hose. The driving motor directly drives the driven gears to extrude the hose, large-flow pumping is achieved, a traditional gear box is omitted, the structure is simple, cost is reduced, in addition, the semicircular clamping grooves slightly smaller than the outer diameter of the hose are used for clamping the hose, traditional clamping pieces are omitted, and the service life of the hose is prolonged. And when the hose is replaced, the length of the hose is not required, so that the hose is more convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, in particular to a large-flow peristaltic pump. Background Art

[0002] Since the torque required for the operation of a large-flow peristaltic pump is relatively large, the existing large-flow peristaltic pumps are roughly divided into two driving methods: one is to use a high-power stepper motor to drive directly, but the high-power stepper motor drive is relatively large and the cost is also high; the other is to use a reduction motor to drive, but to drive a stepper motor to rotate normally, it must also be used in conjunction with a stepper motor driver (gearbox), and the combined cost of the two is very high.

[0003] The use of a reduction motor and a stepper motor driver to drive a high-flow peristaltic pump is currently a widely used solution for producing high-flow peristaltic pumps, but the manufacturing cost of the peristaltic pump is relatively high. In addition, the pump tube of the existing high-flow peristaltic pump needs to be fixed to the pump housing through an adapter or a tube clamp on the tube to prevent the pump tube from shifting when the extrusion wheel rotates and extrudes during the operation of the peristaltic pump. When replacing the pump tube, the length of the pump tube must be the same before it can be installed and used, which makes it inconvenient to replace the pump tube. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art and provides a high-flow peristaltic pump with low cost and convenient pump tube replacement.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a large-flow peristaltic pump, including a driving motor, a shell, a hose and an extrusion mechanism, the extrusion mechanism is located in the shell, the output shaft of the driving motor passes through the shell and is connected to the extrusion mechanism, the hose is bent and embedded between the extrusion mechanism and the inner wall of the shell, and both ends are passed through the upper side of the shell; the extrusion mechanism includes a gear shaft, a gear rack and a plurality of driven gears, the gear shaft is installed at the center of the gear rack, and the plurality of driven gears are evenly arranged on the gear rack along the axis of the gear shaft and are all meshed with the gear shaft, and the plurality of driven gears are in contact with the hose.

[0006] Furthermore, the gear rack includes two side plates, which are connected by a plurality of connecting plates, and a plurality of slots are arranged on the edges of the two side plates, and the two ends of the central shaft of the driven gear are respectively placed in the slots on the two side plates.

[0007] Furthermore, a through hole is arranged at the center of the side plate near the driving motor, and the output shaft of the driving motor passes through the through hole and is connected to the gear shaft. A positioning column is arranged on the outer side of the side plate away from the driving motor, and a bearing is arranged on the positioning column.

[0008] Furthermore, it also includes a cover body, which is connected to the outer side of the shell, and a positioning groove is arranged inside the cover body, and the bearing is located in the positioning groove.

[0009] Furthermore, the cover body and the upper side of the shell are both provided with a semicircular groove, and the diameter of the semicircular groove is slightly smaller than the outer diameter of the hose.

[0010] Furthermore, a D-shaped hole is provided at one end of the gear shaft, and the output shaft of the drive motor is plugged into the D-shaped hole.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. In the utility model, the large-flow peristaltic pump has a driving motor directly connected to the extrusion mechanism. The multiple driven gears of the extrusion mechanism are rotated by the driving motor and the gear shaft to extrude the hose. Without the need for a gearbox, the torque is improved and large-flow pumping is achieved. In addition, the structure is simple and the cost is reduced.

[0013] 2. A positioning column is arranged on the outer side of the side plate of the gear rack away from the driving motor, and a bearing is installed on the positioning column. When the cover body is docked with the shell, the bearing is located in the positioning groove inside the cover body, thereby supporting and positioning the gear rack; the cover body and the shell are connected by bolts, which is convenient for assembly.

[0014] 3. Both ends of the hose are respectively clamped in the semicircular clamping grooves on the upper side of the cover body and the shell. After the cover body and the shell are docked, the hose can be tightly fixed. Compared with the traditional method of setting a clamp at the fixed position of the hose for clamping, the hose of this application is more convenient to install and replace. In addition, the number of clamp accessories is reduced, further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model without the cover;

[0017] Figure 3 It is a structural schematic diagram of the extrusion mechanism in the embodiment of the utility model;

[0018] Figure 4 It is a rear view of the extrusion mechanism in the embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the cover body in the embodiment of the utility model;

[0020] In the figure: 1-driving motor, 2-housing, 3-cover, 4-hose, 5-gear shaft, 6-gear rack, 7-driven gear, 8-positioning groove, 9-semicircular slot, 61-side plate, 62-connecting plate, 63-slot, 64-positioning column, 65-bearing, 66-D-shaped hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0022] Example: Figures 1 to 5 As shown, a large-flow peristaltic pump includes a driving motor 1, a shell 2, a cover 3, a hose 4 and an extrusion mechanism, wherein the extrusion mechanism is located in the shell 2, and the output shaft of the driving motor 1 passes through the shell 2 and is connected to the extrusion mechanism, and the hose 4 is bent and embedded between the extrusion mechanism and the inner wall of the shell 2, and both ends are passed through the upper side of the shell 2; the extrusion mechanism includes a gear shaft 5, a gear frame 6 and a plurality of driven gears 7, the gear shaft 5 is installed at the center of the gear frame 6, and the plurality of driven gears 7 are evenly arranged on the gear frame 6 along the axis of the gear shaft 5 and are all meshed with the gear shaft 5, and the plurality of driven gears 7 are in contact with the hose 4 to extrude it.

[0023] Specifically, in this embodiment, the number of driven gears 7 is three, and in other embodiments, it can also be two, four or more, which is not limited here. The wheel diameter ratio of the gear shaft 5 to the driven gear 7 is 1:10, which increases the torque and achieves a large flow.

[0024] The gear rack 6 includes two side plates 61, and the two side plates 61 are connected by three connecting plates 62. The angle between the three connecting plates 62 is 120 degrees. Three slots 63 are set on the edges of the two side plates 61, and the two ends of the central axis of the driven gear 7 are respectively placed in the slots 63 on the two side plates 61.

[0025] A through hole is provided at the center of the side plate 61 near the drive motor 1, and the output shaft of the drive motor 1 passes through the through hole and is connected to the gear shaft 5. A positioning column 64 is provided on the outer side of the side plate 61 away from the drive motor 1, and a bearing 65 is provided on the positioning column 64. A D-shaped hole 66 is provided at one end of the gear shaft 5, and the cross-section of the end of the output shaft of the drive motor 1 is also D-shaped, and is matched and plugged into the D-shaped hole 66 for transmission.

[0026] The cover body 3 is connected to the outer side of the housing 2 by three bolts. A positioning groove 8 is arranged on the inner side of the cover body 3. The bearing 65 is located in the positioning groove 8 to achieve positioning support.

[0027] Semicircular grooves 9 are provided on the upper sides of the cover body 3 and the shell 2. The diameter of the semicircular grooves 9 is slightly smaller than the outer diameter of the hose 4. After the cover body 3 and the shell 2 are connected, the hose 4 can be tightly clamped in the semicircular grooves 9 on both sides to avoid displacement. Moreover, when replacing the hose at a later stage, there is no need to cut the fixed-length hose so that the clamping parts on the upper side can be fixed with the clamping parts in the shell, which makes replacement more convenient. In addition, the clamping parts are reduced to save costs.

[0028] The large-flow peristaltic pump of the embodiment of the utility model combines the gear transmission and the extrusion roller of the traditional peristaltic pump into one, and directly extrude the hose through the driven gear, thereby eliminating the need for a transmission component. Moreover, the cost of the transmission is relatively high. Through the structure of the utility model, the production cost of the peristaltic pump is reduced, and it has good application prospects.

[0029] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high flow peristaltic pump, characterized in that: It includes a driving motor, a shell, a hose and an extrusion mechanism, wherein the extrusion mechanism is located in the shell, the output shaft of the driving motor passes through the shell and is connected to the extrusion mechanism, the hose is bent and embedded between the extrusion mechanism and the inner wall of the shell, and both ends are passed through the upper side of the shell; the extrusion mechanism includes a gear shaft, a gear frame and a plurality of driven gears, the gear shaft is installed at the center of the gear frame, the plurality of driven gears are evenly arranged on the gear frame along the axis of the gear shaft and are all meshed with the gear shaft, and the plurality of driven gears are in contact with the hose.

2. The high flow peristaltic pump according to claim 1, characterized in that: The gear rack includes two side plates, which are connected by a plurality of connecting plates. A plurality of slots are arranged on the edges of the two side plates, and the two ends of the central shaft of the driven gear are respectively placed in the slots on the two side plates.

3. The high flow peristaltic pump according to claim 2, characterized in that: A through hole is arranged at the center of the side plate close to the driving motor, and the output shaft of the driving motor passes through the through hole and is connected to the gear shaft. A positioning column is arranged on the outer side of the side plate away from the driving motor, and a bearing is arranged on the positioning column.

4. The high flow peristaltic pump according to claim 3, characterized in that: It also includes a cover body, which is connected to the outer side of the shell. A positioning groove is arranged on the inner side of the cover body, and the bearing is located in the positioning groove.

5. The high flow peristaltic pump according to claim 4, characterized in that: The cover body and the upper side of the shell are both provided with a semicircular groove, and the diameter of the semicircular groove is slightly smaller than the outer diameter of the hose.

6. The high flow peristaltic pump according to claim 3, characterized in that: A D-shaped hole is provided at one end of the gear shaft, and the output shaft of the driving motor is plugged into the D-shaped hole.

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