Peristaltic pump structure

Abstract

The utility model discloses a linear peristaltic pump relates to fluid delivery equipment technical field, this linear peristaltic pump includes conveyer belt, gear set, pump pipe clamping groove and pump pipe, and gear set is as the support mechanism of conveyer belt with drive mechanism, and through motor drive gear set operation, drives conveyer belt clockwise operation, makes the gyro wheel on conveyer belt cyclic extrusion pump pipe installed in pump pipe clamping groove, realizes the stable delivery of liquid in pump pipe. The utility model has the advantages of pipeline convenient dismounting, flow continuous low pulsation, hose stress uniformity and long life, is applicable to medical perfusion, laboratory fluid delivery etc. the scene of higher requirement to flow accuracy and safety.

Description

Technical Field

[0001] This utility model relates to the field of medical infusion pump technology, specifically to a linear peristaltic pump structure. Background Technology

[0002] A peristaltic pump is a type of pump that uses a flexible tube and one or more sets of rollers (or other squeezing elements) to squeeze the flexible tube through rotation or reciprocating motion, thereby propelling the flow of liquid. When liquid passes through the tube, the tube is compressed under the pressure of the rollers, forcing the fluid to flow within the tube. As the rollers rotate, the squeezing zone of the tube changes sequentially, and the liquid is uniformly propelled, forming a continuous flow.

[0003] A key feature of peristaltic pumps is their contactless delivery: the liquid only comes into contact with external equipment through the piping, avoiding direct contact between the pump body and the liquid being transported. Therefore, peristaltic pumps are particularly suitable for transporting viscous liquids, liquids containing gas, or in situations where maintaining liquid purity and preventing cross-contamination are crucial.

[0004] Despite the many advantages of peristaltic pumps, they still face some technical challenges and limitations in practical applications, especially in the field of medical infusion pumps:

[0005] Flow fluctuations and accuracy issues: The flow stability of peristaltic pumps is affected by various factors, including pipeline elasticity, pump speed variations, and temperature changes. During long-term operation, pipeline elasticity and friction may change, leading to flow fluctuations. Especially under low flow rates and long-term continuous infusion conditions, precise control of peristaltic pumps is challenging, requiring fine-tuning and algorithm optimization to reduce fluctuations.

[0006] Pipe wear and aging issues: The working principle of a peristaltic pump relies on the repeated compression of the pipe by rollers. During use, the friction of the pipe gradually increases, which may lead to pipe aging, wear, or even rupture. This not only affects the pump's performance but may also cause interruptions in the delivery process, affecting the safety of medical procedures. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a peristaltic pump structure that solves the problems of cumbersome disassembly and assembly of pipelines, large flow pulsation, and short hose life of traditional rotary peristaltic pumps.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a peristaltic pump structure, including a conveyor belt, a gear set, a pump tube slot and a pump tube.

[0009] The conveyor belt consists of conveyor belt plates and several rollers; the several conveyor belt plates are connected in sequence to form a ring structure, and the rollers are rotatably mounted on the conveyor belt plates, with the rollers spaced apart along the running direction of the conveyor belt; the pump pipe slot is used to install the pump pipe; after the pump pipe slot is installed in place, the pump pipe is pressed against the rollers on the outside of the conveyor belt; the gear set drives the conveyor belt plates to work, and the rollers roll and squeeze the pump pipe, pushing the liquid inside the pump pipe to flow.

[0010] Furthermore, the gear set includes a driving gear, a first driven gear, a second driven gear, and a support member. The support member is used to install and fix the driving gear, the first driven gear, and the second driven gear. There is one driving gear and two first driven gears, which are symmetrically arranged on both sides of the driving gear, and both first driven gears mesh with the driving gear. Each first driven gear is correspondingly provided with a second driven gear. The second driven gear is coaxially arranged with the corresponding first driven gear and relatively fixed. The second driven gear meshes with the teeth on the inner side of the conveyor belt plate.

[0011] Furthermore, the conveyor belt plate includes an outer mounting area, an inner meshing area, and an end connection area; the outer mounting area is used to mount rollers; the inner meshing area meshes with a second driven gear; and the end connection area is used to connect with an adjacent conveyor belt plate.

[0012] Furthermore, the second driven gear is provided with an arc-shaped tooth groove on its outer side and an arc-shaped tooth matching the tooth groove in its inner meshing area.

[0013] The beneficial effects of this utility model are as follows:

[0014] Compared to traditional rotary peristaltic pumps, linear peristaltic pumps use slotted straight tubing, making disassembly and assembly easier and allowing for quick replacement of tubing consumables. Rotary pumps generally require tubing laid around an arc-shaped pump head, which is relatively cumbersome. Due to the circular motion of the rollers, the typical flow curve of a rotary pump exhibits periodic pulsations. Linear pumps, through the parallel and staggered compression of multiple rollers, achieve a more continuous, low-pulsation flow rate. The linear structure also makes it easier to achieve constant pressure, resulting in more uniform stress on the tubing. Rotary pumps experience some impact when the rollers enter and leave the compression zone.

[0015] Therefore, compared with the traditional rotary peristaltic pump structure, the linear peristaltic method of this invention has a longer hose life, more controllable compressive stress, and more stable fluid flow. It is easy to operate and has high efficiency in replacing consumables. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0019] refer to Figure 1 The present invention provides a peristaltic pump structure, comprising a conveyor belt 1, a gear set 2, a pump pipe slot 3, and a pump pipe 4.

[0020] The conveyor belt 1 consists of conveyor belt plates 12 and a plurality of rollers 11. The plurality of conveyor belt plates 12 are connected in sequence to form a ring structure. The conveyor belt plate 12 includes an outer mounting area, an inner meshing area and an end connection area; the outer mounting area is used to mount the rollers 11; the inner meshing area meshes with the second driven gear 22; and the end connection area is used to connect with the adjacent conveyor belt plate 12.

[0021] Rollers 11 are rotatably mounted on the conveyor belt plate 12, and a plurality of rollers 11 are distributed at intervals along the running direction of the conveyor belt 1.

[0022] In this embodiment, the roller 11 can be rotatably installed in the mounting groove of the outer mounting area via a rotating shaft. The axis of the rotating shaft is perpendicular to the running direction of the conveyor belt 1, and several rollers 11 are spaced apart along the running direction of the conveyor belt 1 to ensure that the rollers can continuously and uniformly squeeze the pump tube during the operation of the conveyor belt.

[0023] The gear set 2 is the support and transmission mechanism of the conveyor belt 1, including the driving gear 23, the first driven gear 21, the second driven gear 22 and the support member 24.

[0024] The support member 24 is used to install and fix the driving gear 23, the first driven gear 21, and the second driven gear 22.

[0025] The support component 24 includes a support base and a support shaft. The support base is fixedly mounted on the equipment frame, and the support shaft is mounted on the support base. The driving gear 26 is rotatably mounted on an independent support shaft via bearings. The two first driven gears 21 are rotatably mounted on two different support shafts via bearings, and the two support shafts are symmetrically distributed on both sides of the driving gear support shaft. The second driven gear 22 corresponding to each first driven gear 21 shares a support shaft with the first driven gear 21. The two are relatively fixed by a flat key to ensure the synchronicity of coaxial rotation. All gears have the same gear tooth module to ensure smooth meshing transmission.

[0026] There is one driving gear 26 and two first driven gears 21, which are symmetrically arranged on both sides of the driving gear 26, and both first driven gears 21 mesh with the driving gear 26. Each first driven gear 21 is provided with a corresponding second driven gear 22. The second driven gear 22 is coaxially arranged with the corresponding first driven gear 21 and is relatively fixed. The outer side of the second driven gear 22 is provided with arc-shaped tooth grooves, and the inner meshing area is provided with arc-shaped teeth that match the tooth grooves. The second driven gear 22 meshes with the teeth on the inner side of the conveyor belt plate 12. Through the meshing transmission between the gears, the power of the motor is stably transmitted to the conveyor belt 1. The motor and the driving gear 26 are connected by a flexible coupling.

[0027] Pump pipe slot 3 is used to install pump pipe 4. After pump pipe slot 3 is installed in place, pump pipe 4 is pressed against roller 11 on the outside of conveyor belt 1. Gear set 2 drives conveyor belt plate 12 to work, and roller 11 rolls and squeezes pump pipe 4, pushing the liquid in pump pipe 4 to flow.

[0028] In this embodiment, the slot body includes a slot body in the form of an elongated groove structure. The groove has a U-shaped cross-section, and the inner wall of the slot body may also be provided with anti-slip protrusions. Through holes for the tube to pass through are also provided at both ends of the slot body. Adjustable clamping devices (existing technology, such as clamps and fastening bolts) can be installed in the through holes.

[0029] Pump pipe 4 is installed in pump pipe slot 3, with both ends of pump pipe 4 connected to external infusion lines. Pump pipe 4 is tightly pressed against the rollers 11 on the outer side of conveyor belt 1. The motor is started, and the motor drives the drive gear 26 to rotate counterclockwise through the flexible coupling. The drive gear 26 simultaneously drives the first driven gears 21 on both sides to rotate clockwise synchronously. Since each first driven gear 21 is coaxial with and relatively fixed to the corresponding second driven gear 22, the first driven gear 21 drives the second driven gear 22 to rotate clockwise synchronously. The two second driven gears 22 mesh with the inner tooth grooves of the conveyor belt plate 12, jointly driving the conveyor belt 1 to run clockwise. During the operation of the conveyor belt 1, the outer rollers 11 roll on the surface of pump pipe 4, continuously and evenly squeezing the pump pipe 4, so that the liquid in the pump pipe 4 flows smoothly from the inlet end to the outlet end under the squeezing action, realizing precise liquid delivery.

[0030] This invention optimizes the gear set structure by using a single driving gear coupled with driven gears on both sides, simplifying the transmission mechanism and reducing the equipment failure rate. At the same time, the meshing transmission between the inner tooth groove of the conveyor belt plate and the second driven gear ensures the smooth operation of the conveyor belt. Combined with the continuous compression of multiple rollers, it effectively reduces flow pulsation and extends the service life of the pump tube. It is suitable for scenarios with high requirements for flow stability and equipment reliability, such as medical perfusion and laboratory precision infusion.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A peristaltic pump structure, characterized in that: The system includes a conveyor belt (1), a gear set (2), a pump tube slot (3), and a pump tube (4). The conveyor belt (1) is composed of a conveyor belt plate (12) and several rollers (11). Several conveyor belt plates (12) are connected in sequence to form a ring structure. The rollers (11) are rotatably mounted on the conveyor belt plate (12), and the rollers (11) are spaced apart along the running direction of the conveyor belt (1). The pump tube slot (3) is used to install the pump tube (4). After the pump tube slot (3) is installed in place, the pump tube (4) is pressed against the rollers (11) on the outside of the conveyor belt (1). The gear set (2) drives the conveyor belt plate (12) to work, and the rollers (11) roll and squeeze the pump tube (4), pushing the liquid in the pump tube (4) to flow.

2. The peristaltic pump structure according to claim 1, characterized in that: The gear set (2) includes a driving gear (23), a first driven gear (21), a second driven gear (22), and a support member (24). The support member (24) is used to install and fix the driving gear (23), the first driven gear (21), and the second driven gear (22). There is one driving gear (23) and two first driven gears (21), which are symmetrically arranged on both sides of the driving gear (23), and both first driven gears (21) mesh with the driving gear (23). Each first driven gear (21) is provided with a corresponding second driven gear (22). The second driven gear (22) is coaxially arranged with the corresponding first driven gear (21) and relatively fixed. The second driven gear (22) meshes with the teeth on the inner side of the conveyor belt plate (12).

3. The peristaltic pump structure according to claim 1, characterized in that: The conveyor belt plate includes an outer mounting area, an inner meshing area, and an end connection area; the outer mounting area is used to mount rollers (11); the inner meshing area meshes with the second driven gear (22); and the end connection area is used to connect with the adjacent conveyor belt plate (12).

4. The peristaltic pump structure according to claim 3, characterized in that: The second driven gear (22) has an arc-shaped tooth groove on its outer side and an arc-shaped tooth matching the tooth groove on its inner meshing area.

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