A peristaltic pump with a roller and ball transmission

Abstract

The utility model provides a kind of gyro wheel ball transmission peristaltic pump, including base, pipeline installation component, power device, peristaltic mechanism and gas-liquid pipeline, the pipeline installation component is installed on base by two regulators, the power device is arranged in the rear end of pipeline installation component and is connected with peristaltic mechanism, the power device includes servo motor and planetary reducer, servo motor is connected with planetary reducer, planetary reducer is connected with the peristaltic mechanism, and peristaltic mechanism is pressed on gas-liquid pipeline.The utility model designs the gear tilt angle of passive gear and driving gear as asymmetric structure, utilizes servo motor to drive planetary reducer to drive ball chain to advance, realizes ball chain to carry out mechanical type rolling pressure gas-liquid pipeline to produce peristalsis to make liquid or gas transmission, and asymmetric bearing ball rolling pressure produces peristalsis to make liquid delivery reach to offset the fluctuation of liquid or gas generated by single wheel, reach the purpose of accurate delivery.

Description

Technical Field

[0001] This utility model relates to the field of liquid conveying equipment, specifically to a roller ball driven peristaltic pump. Background Technology

[0002] Peristaltic pumps are a new type of fluid transfer pump following rotary pumps, centrifugal pumps, diaphragm pumps, and syringe pumps. Peristaltic pumps are being widely promoted and applied in various industries such as medical, pharmaceutical, food, beverage, chemical, metallurgical, and laboratory analysis.

[0003] Currently, commonly used peristaltic pumps are classified into two types based on their extrusion components: roller type and ball type. In roller-type peristaltic pumps, the rollers, acting as the extrusion unit, need to rotate around a central axis located at the center of the rollers during operation, making miniaturization difficult. Ball-type peristaltic pumps, on the other hand, eliminate the central axis, replacing the traditional rollers with balls. This gives them a significant technological advantage in miniaturization and multi-channel applications. Furthermore, in micro-flow applications at micro-liter levels and below, they exhibit very low pulsation and good stability, overcoming the limitation of traditional peristaltic pumps in truly achieving continuous micro-flow injection.

[0004] However, in existing ball-type peristaltic pumps, the balls are all set on rotating parts that rotate synchronously with the motor shaft inside the pump. Due to the influence of processing technology and processing precision, it is difficult to ensure the consistency of each ball's position. This results in different degrees of compression of the hose by each ball, causing flow fluctuations and affecting the stability and consistency of the peristaltic pump. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a roller ball drive peristaltic pump that adopts an asymmetrical side bearing gear and ball chain design, which can solve the problem of fluctuation in the output liquid or gas in existing technologies and achieve stable delivery.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A peristaltic pump driven by rollers and ball bearings includes a base, a pipeline mounting assembly, a power unit, a peristaltic mechanism, and a gas-liquid pipeline. The pipeline mounting assembly is mounted on the base via two adjusters. The power unit is located at the rear end of the pipeline mounting assembly and connected to the peristaltic mechanism. The power unit includes a servo motor and a planetary reducer, with the servo motor connected to the planetary reducer. The peristaltic mechanism includes a tension adjustment mechanism, an asymmetrical side bearing gear, and a ball chain. The tension adjustment mechanism consists of two parallel adjusting plates and multiple connecting blocks connecting the two adjusting plates together. The inner adjusting plate extends outward to form a mounting plate. Both adjusting plates have horizontal adjusting grooves, which are horizontally positioned. The asymmetrical side bearing gear includes a driving gear and a driven gear, which are respectively mounted at the left and right ends of the tension adjustment mechanism. The power output end of the planetary reducer passes through the mounting plate and connects to the driving gear. The ball chain meshes between the driving gear and the driven gear and is pressed against the gas-liquid pipeline.

[0007] Furthermore, the adjustment plate has a right-angled sector-shaped structure.

[0008] Furthermore, the gear tilt angles of the driving gear and the driven gear are asymmetrically set.

[0009] Furthermore, the gear tilt angle of the driving gear is +15 degrees, and the gear tilt angle of the driven gear is -15 degrees.

[0010] Furthermore, the ball chain meshes between the driving gear and the driven gear.

[0011] Furthermore, the passive gear is mounted between two adjusting plates via a bearing, with both ends of the bearing respectively located in adjusting grooves and fixed by a locking mechanism.

[0012] Furthermore, the ball chain consists of a chain and several rollers installed at the left and right ends of the chain. The chain meshes with the driving gear and the driven gear and rotates in a cycle. The rollers move downward driven by the chain. The diameter of the rollers is larger than the width of the chain. The rollers press against the surface of the gas-liquid pipeline.

[0013] Furthermore, a chain presser is provided between the driving gear and the driven gear. The chain presser has a block structure, and a connecting bracket is provided at the upper end of the chain presser. The connecting bracket is fixed to the mounting plate by bolts, and the lower end of the chain presser is in contact with the roller.

[0014] Furthermore, the gas-liquid pipeline is a flexible hose.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention designs the passive gear and the active gear with an asymmetrical gear tilt angle. A servo motor drives a planetary reducer to move the ball chain, which mechanically rolls the gas-liquid pipeline to generate peristalsis, thus transporting liquid or gas. The asymmetrical side roller design of the dual pipeline achieves multi-stage rolling to generate pressure and flow rate, ensuring that the liquid or gas does not fluctuate. The peristalsis generated by the asymmetrical bearing ball rolling offsets the fluctuations of liquid or gas generated by a single wheel, thus achieving the purpose of precise delivery. Attached Figure Description

[0016] Figure 1 This is a front view of the roller ball driven peristaltic pump described in this utility model; Figure 2 This is an exploded view of the roller ball driven peristaltic pump described in this utility model; Figure 3 This is a side view of the roller ball driven peristaltic pump described in this utility model; Figure 4 For the appendix Figure 2 The diagram shows the structure of the guide plate. Figure 5 For the appendix Figure 2 The diagram shows the structure of the positioning frame. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-3 As shown, a roller ball driven peristaltic pump includes a base 1, a pipeline mounting assembly 2, a power unit 3, a peristaltic mechanism 4, and a gas-liquid pipeline 5. The base 1 is made of stainless steel and is a plate-like structure with a groove in the middle. The pipeline mounting assembly 2 is mounted on the base 1 via two adjusters 6. The adjusters 6 are Z-axis lifting and fine-tuning platforms. A Z-axis lifting and fine-tuning platform is a precision mechanical device specifically designed for making small, precise, and controllable height adjustments in the vertical direction (Z-axis), capable of achieving micron (µm) level micro-step adjustments. In this embodiment, the two Z-axis lifting and fine-tuning platforms can make micron-level up and down adjustments to the pipeline mounting assembly 2 to ensure accuracy. The Z-axis lifting and fine-tuning platform used in this embodiment is a commonly used product on the market, and its specific structure is not described here.

[0019] The pipeline installation assembly 2 is used to install the gas-liquid pipeline 5. The pipeline installation assembly 2 includes a base frame 21, a support frame 22, a positioning frame 23, a pipeline positioning device 24, and a guide plate 25. The lower end of the guide plate 25 is mounted on the base 1, and the guide plate 25 is arranged perpendicular to the base 1. Figure 4 The guide plate 25 has a guide groove 251 at each of its left and right ends, and the guide grooves 251 are vertically oriented. The base frame 21 is installed on the top of the two adjusters 6. One side of the base frame 21 is movably installed in the guide groove 251 by bolts. When the adjusters 6 are adjusted, they can drive the base frame 21 to move up and down along the guide groove 251. The base frame 21 is made of stainless steel and has a certain strength and toughness. There are two support frames 22, which are respectively installed at the left and right ends of the base frame 21. The support frames 22 are provided with two U-shaped grooves for supporting the gas-liquid pipeline 5. There are two gas-liquid pipelines 5, which are respectively inserted into the U-shaped grooves on the left and right support frames 22. The gas-liquid pipelines 5 are flexible hoses. The pipeline positioning device 24 is installed on the U-shaped groove of the support frame 22 and is used to fix the gas-liquid pipeline 5. The positioning frame 23 is installed on the base frame 21 and located between the two support frames 22. Figure 5 As shown, a protruding positioning block 231 is provided in the middle of the positioning frame 23. Two positioning grooves 232 are also provided on the positioning block 231. The positioning grooves 232 are U-shaped and are used to support the gas-liquid pipeline 5. The positioning grooves 232 and the U-shaped grooves of the support frame 22 are on the same straight line. Correspondingly, the height and curvature of the positioning grooves 232 are the same as those of the U-shaped grooves of the support frame 22. The gas-liquid pipeline 5 can be supported and positioned by the positioning grooves 232 and the U-shaped grooves at the same time. The gas-liquid pipeline 5 enters the positioning groove 232 on the positioning block 231 from the U-shaped groove of one support frame 22 and then extends out from the U-shaped groove of the other support frame 22. The pipeline positioning device 24 fixes the gas-liquid pipeline 5 in the U-shaped groove, thereby realizing the fixation of the gas-liquid pipeline 5.

[0020] The power unit 3 is located at the rear end of the pipeline installation assembly 2 and connected to the peristaltic mechanism 4. The power unit 3 includes a servo motor 32 and a planetary reducer 31. Both the servo motor 32 and the planetary reducer 31 are located on the outside of the guide plate 25. The servo motor 32 is connected to the planetary reducer 31. The servo motor 32 is used to provide the power for movement, and the planetary reducer 31 is used for power transmission. The reduction and torque increase are achieved through the coordinated work of multiple planetary gears. In this embodiment, the planetary reducer is used to increase the torque, which can transmit and transmit various types of flexible pipelines.

[0021] The peristaltic mechanism 4 is connected to the planetary reducer 31. The peristaltic mechanism 4 includes a tension adjustment mechanism 41, an asymmetrical side bearing gear 42, and a ball chain 43. The tension adjustment mechanism 41 is mounted on the guide plate 25 and located inside the guide plate 25. The tension adjustment mechanism 41 consists of two parallel adjustment plates 411 and multiple connecting blocks 412 connecting the two adjustment plates 411 together. The adjustment plates 411 have a right-angled sector structure. The inner adjustment plate 411 is connected to the guide plate 25 of the pipeline installation assembly 2 by bolts, and this adjustment plate 411 extends outward to form an installation plate 414. Both adjustment plates 411 have horizontal adjustment grooves 413. The adjustment grooves 413 are horizontal. The adjustment groove 413 is used to adjust the tension of the ball chain 43. The asymmetrical side bearing gear 42 includes a driving gear 421 and a driven gear 422, which are respectively installed at the left and right ends of the tension adjustment mechanism 41. The power output end of the planetary reducer 31 passes through the mounting plate 414 and is connected to the driving gear 421. The planetary reducer 31 can drive the driving gear 421 to rotate. The gear tilt angles of the driving gear 421 and the driven gear 422 are asymmetrically set. The purpose of setting the asymmetrical gear tilt angles of the driving gear and the driven gear is to provide slight compensation for the precision of the compressed gas-liquid pipeline 5. In this embodiment, the gear tilt angle of the driving gear is +15 degrees. The driven gear 422 has a gear tilt angle of -15 degrees. Experiments have verified that when the gear tilt angles of the driving and driven gears are designed to be ±15 degrees, precise micro-compensation for gas or liquid transport within the two gas-liquid pipelines 5 can be achieved. Two ball chains 43 are present, meshing between the driving and driven gears and pressing against the gas-liquid pipelines 5. Specifically, the ball chain 43 consists of a chain 431 and several rollers 432 installed at both ends of the chain 431. The chain 431 meshes with the driving and driven gears and rotates cyclically. The rollers 432 move downwards driven by the chain 431. The diameter of the rollers 432 is larger than the width of the chain 431, allowing the rollers 432 to move forward. Roller 432 can press against the surface of the gas-liquid pipeline 5. During its movement, roller 432 sequentially compresses the gas-liquid pipeline 5. The gas-liquid pipeline 5 is squeezed during the compression process, forcing the internal liquid or gas to flow forward. The stable transmission of the ball chain 43 ensures the efficient and precise operation of the pump. The transmission of the ball chain 43 causes the roller to rotate continuously, and the hose is continuously compressed and released, forming a continuous liquid delivery process. Since the two driving gears and the two driven gears are asymmetrically arranged, the rollers 432 at both ends of the chain 431 are also asymmetrically arranged. The asymmetrical rollers 432 roll and generate peristalsis, so that the liquid or gas delivery can offset the fluctuations generated by a single wheel. The principle is that one presses and the other releases, and they cooperate to solve the problem of fluctuations in the output liquid or gas.To ensure the ball chain 43 continuously applies pressure to the gas-liquid pipeline 5, the driven gear 422 is mounted between two adjusting plates 411 via a bearing. The bearing's two ends are respectively positioned within adjusting grooves 413 and fixed by a locking mechanism. Adjusting the bearing's position within the adjusting grooves 413 adjusts the tension of the ball chain 43. A chain presser 44 is positioned between the driving gear 421 and the driven gear 422. The chain presser 44 is a block-shaped structure with a certain weight. A connecting bracket is mounted on the upper end of the chain presser 44, which is bolted to the mounting plate 414. The lower end of the chain presser 44 contacts the roller 432. When the ball chain 43 is tensioned, the chain presser 44 provides downward pressure to the roller 432, thus ensuring the effective pressure of the ball chain 43 on the gas-liquid pipeline 5.

[0022] The usage method of this device is as follows: 1. Adjust the two regulators 6 to the lowest position, and insert the two gas-liquid pipes 5 into the U-shaped grooves on the left and right support frames 22 and the positioning grooves 232 on the positioning block 231 respectively. Then fix the gas-liquid pipes 5 in the U-shaped grooves with the pipe positioning device 24. Then connect the gas-liquid pipes 5 to the external pipes. 2. Adjust the two regulators 6 to the calibrated position so that the gas-liquid pipeline 5 and the ball chain 43 form a closed compression tube. Power on the equipment and send a command through the control software. The servo motor executes the command. The servo motor 32 outputs power to the planetary reducer 31. The planetary reducer 31 increases the torque and drives the drive gear 421 to rotate in the forward or reverse direction. The drive gear 421 drives the ball chain 43 to move in a straight line to compress the pipeline and generate negative pressure to draw in gas or liquid. 3. During the compression process, the gas-liquid pipeline 5 is squeezed, forcing the internal gas or liquid to flow forward. During the compression of the gas-liquid pipeline 5 by the ball chain 43, the gas or liquid is driven out of the hose and transported to the target position through the outlet of the gas-liquid pipeline 5. After the compression is released, the gas-liquid pipeline 5 returns to its original state, forming a vacuum state, thereby drawing in new gas or liquid. The transmission of the ball chain 43 causes the roller to rotate continuously, and the hose is continuously compressed and released, forming a continuous liquid transportation process.

[0023] This invention designs the passive gear and the active gear with an asymmetrical gear tilt angle. A servo motor drives a planetary reducer to move the ball chain, which mechanically rolls the gas-liquid pipeline to generate peristalsis, thus transporting liquid or gas. The asymmetrical side roller design of the dual pipeline achieves multi-stage rolling to generate pressure and flow rate, ensuring that the liquid or gas does not fluctuate. The peristalsis generated by the asymmetrical bearing ball rolling offsets the fluctuations of liquid or gas generated by a single wheel, thus achieving the purpose of precise delivery.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A peristaltic pump driven by rollers and balls, comprising a base (1), a pipeline mounting assembly (2), a power unit (3), a peristaltic mechanism (4), and a gas-liquid pipeline (5), characterized in that: The pipeline installation assembly (2) is mounted on the base (1) via two adjusters (6). The power unit (3) is located at the rear end of the pipeline installation assembly (2) and connected to the peristaltic mechanism (4). The power unit (3) includes a servo motor (32) and a planetary reducer (31). The servo motor (32) is connected to the planetary reducer (31). The peristaltic mechanism (4) includes a tension adjustment mechanism (41), an asymmetrical side bearing gear (42), and a ball chain (43). The tension adjustment mechanism (41) consists of two parallel adjusting plates (411) and multiple connecting blocks (312) that connect the two adjusting plates (411) together. The inner adjusting plate is located on the inner side. (411) Extend outward to form a mounting plate (412). Both adjustment plates (411) are provided with horizontal adjustment grooves (413). The adjustment grooves (413) are set horizontally. The asymmetrical side bearing gear (42) includes a driving gear (421) and a driven gear (422). The driving gear (421) and the driven gear (422) are respectively installed at the left and right ends of the tension adjustment mechanism (41). The power output end of the planetary reducer (31) passes through the mounting plate (412) and is connected to the driving gear (421). The ball chain (43) meshes between the driving gear (421) and the driven gear (422), and the ball chain (43) is pressed on the gas-liquid pipeline (5).

2. The peristaltic pump with roller and ball drive according to claim 1, characterized in that: The adjustment plate (411) has a right-angled sector structure.

3. The peristaltic pump with roller and ball drive according to claim 1, characterized in that: The gear tilt angles of the driving gear (421) and the driven gear (422) are asymmetrically set.

4. The peristaltic pump with roller and ball drive according to claim 3, characterized in that: The gear tilt angle of the driving gear (421) is +15 degrees, and the gear tilt angle of the driven gear (422) is -15 degrees.

5. The peristaltic pump with roller and ball drive according to claim 1, characterized in that: The ball chain (43) meshes between the driving gear (421) and the driven gear (422).

6. The peristaltic pump with roller and ball drive according to claim 1, characterized in that: The passive gear (422) is mounted between two adjusting plates (411) by a bearing. The two ends of the bearing are respectively set in the adjusting grooves (413) of the two adjusting plates (411) and fixed by a locking mechanism.

7. The peristaltic pump with roller and ball drive according to claim 1, characterized in that: The ball chain (43) consists of a chain (431) and several rollers (432) installed at the left and right ends of the chain (431). The chain (431) meshes with the driving gear (421) and the driven gear (422) and rotates in a cycle. The diameter of the roller (432) is greater than the width of the chain (431). The lower end of the roller (432) is pressed against the surface of the gas-liquid pipeline (5).

8. The peristaltic pump with roller and ball drive according to claim 7, characterized in that: A chain presser (44) is provided between the driving gear (421) and the driven gear (422). The chain presser (44) is a block structure. A connecting bracket is provided at the upper end of the chain presser (44). The connecting bracket is fixed to the mounting plate (414) by bolts. The lower end of the chain presser (44) is in contact with the roller (432).

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