Durable all-metal peristaltic pump set
By designing a durable all-metal peristaltic pump set, using aluminum alloy material and high wear-resistant parts, combined with advanced motor and roller sleeve structure, the existing peristaltic pump has been solved, and a high flow, long life and multiple parallel pump sets have been achieved.
Patent Information
- Application Number
- CN202421510322.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-28
AI Technical Summary
Existing peristaltic pumps are prone to adhesion and loss of elasticity after long-term use, resulting in functional failure and shorter equipment life.
A durable all-metal peristaltic pump group is designed, using aluminum alloy material and anodized treatment, combined with deep groove ball bearings and precision gaskets, which improves the wear resistance and life of the parts, and realizes the synchronous parallel connection of multiple sets of pump heads through the advancement of motor and roller sleeve structure.
The synchronous parallel connection of more than 3 pump heads is achieved, which improves flexibility and flow. The flow rate of each pump head is greater than 200mL/min, the pump body life exceeds 1000h, and the pump pipe life is also greatly extended, suitable for high-pressure and high-temperature environments.
Smart Images
Figure CN222910228U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of peristaltic pumps, in particular to a durable all-metal peristaltic pump group. Background Art
[0002] A peristaltic pump is like squeezing a fluid-filled hose with fingers. As the fingers slide forward, the fluid inside the tube moves forward. The peristaltic pump works on the same principle, except that rollers replace the fingers, and the elastic delivery hose of the pump is alternately squeezed and released to pump the fluid. Just like squeezing a hose with two fingers, as the fingers move, a negative pressure is formed inside the tube, and the liquid flows accordingly.
[0003] In daily work, it is found that the existing peristaltic pumps cannot synchronize more than three pump heads in groups of more than three. The pump heads that can be paralleled are mostly equipped with small-flow pump tubes. Moreover, when the pump tubes are pressed tightly and remain stationary for a long time, adhesion or loss of elasticity of the pump tubes will occur, resulting in the complete failure of the pump function. In addition, some or all parts of the peristaltic pump use a large amount of engineering plastics, resulting in a low overall service life of the equipment. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the disadvantages of low service life and poor flexibility in the prior art, and to propose a durable all-metal peristaltic pump group.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a durable all-metal peristaltic pump group, including a progressive motor. One end of the progressive motor is equipped with a motor support plate. One side of the motor support plate is installed with a pump rear cover by screws. One side of the pump rear cover is installed with a pump front cover by bolts. The number of the pump rear covers and pump front covers is three groups. The three groups of pump rear covers and pump front covers are sequentially distributed on the output side of the progressive motor. A pump tube gland is arranged between the pump rear cover and the pump front cover support. High-foot screws are arranged on the inner wall of the pump front cover. A locking pressure plate is arranged in the inner wall of the pump rear cover. A disc spring is sleeved on the surface of the locking pressure plate. The inner walls of the three groups of pump rear covers and pump front covers all have a central shaft. Two middle shaft end covers are arranged on the surface of the central shaft. The two middle shaft end covers are installed by screws. Three groups of rollers are arranged between the middle shaft end covers. Rollers are installed on the surfaces of the three groups of rollers. Through the above components, the central shaft and the middle shaft end cover are positioned by a square embedded transition fit. The progressive motor can drive the central shaft, the middle shaft end cover and the three groups of rollers to rotate, so as to achieve output. When replacing the pump tube, only need to loosen the locking pressure plate to take out the pump tube gland. The pump tube gland is used to cooperate with the roller to squeeze the pump tube, so as to generate a sealed volume between the two rollers. The pump tube gland is made of aluminum alloy, and its surface in contact with the pump tube is anodized to further improve the service life of the part itself. At the same time, an appropriate amount of lubricating grease is stored to reduce the wear of the pump tube.
[0006] Preferably, the inner contour of the pump tube gland is an open structure with transition surfaces designed at both ends. With the above components, to replace the pump tube, only the locking pressing plate needs to be loosened, and then the pump tube can be taken out from the pump tube gland. The transition surfaces at both ends avoid sudden stress changes in the pump tube. At the same time, the two cross-sections of the central shaft and the central shaft end cover enable the pump tube to be smoothly introduced into the extrusion chamber, improving the service life of the pump tube.
[0007] Preferably, a deep groove ball bearing I is arranged between the roller and the roller sleeve, and deep groove ball bearings II are arranged on the inner walls of the front pump cover and the rear pump cover. The deep groove ball bearing II allows the central shaft to pass through. With the above components, the deep groove ball bearing I and the deep groove ball bearing II can reduce wear.
[0008] Preferably, a precision gasket I is arranged between the central shaft end cover and the deep groove ball bearing I, and a precision gasket II is arranged between the central shaft end cover and the deep groove ball bearing II.
[0009] Preferably, the head and tail of the central shaft are concave-convex structures. With the above components, the head and tail being concave-convex structures are used to connect to the stepping motor and also to connect to the previous peristaltic pump. The concave-convex structures at both ends are offset by a certain angle in the axial direction. When multiple pump heads are connected in parallel, it can prevent multiple roller sleeves from being stressed simultaneously, reducing the impact of sudden loads on the motor and making the motor more efficient.
[0010] Preferably, a dust cover is installed at the shaft head of the central shaft. With the above components, the dust cover is made of PA material and is installed at the shaft head of the central shaft to prevent dust from entering the bearing and also plays an indicating role when the pump head rotates.
[0011] Preferably, the screws are hexagon socket countersunk head screws. With the above components, all the screws described above are hexagon socket countersunk head screws.
[0012] Preferably, the three roller sleeves are arranged at equal intervals and are evenly distributed around the central shaft at 120 degrees. With the above components, the roller sleeves are evenly distributed around the central shaft at 120 degrees. The inner contour of the pump tube gland and the movement trajectory of the roller sleeves provide a sealing chamber for the pump tube within a range of 180 degrees. The structure of the three roller sleeves reduces the multiple extrusion of the pump tube and extends the service life of the pump tube. The roller sleeves are made of SUS304 material and their outer surfaces are polished to reduce the friction between the roller sleeves and the pump tube.
[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:
[0014] The peristaltic pump group of this scheme can realize the synchronization of more than 3 pump heads in parallel to improve flexibility. The flow rate of each pump head is greater than 200mL / min. It can run continuously and stably when conveying concentrated sulfuric acid. All stress-bearing parts are made of metals of different materials. The mechanical strength of the product is greatly improved. The service life of the pump body exceeds 1000h, and the life of the pump tube is also greatly extended. It is suitable for all 16 peristaltic pump tubes (including perfluororubber tubes), with a rated speed of 0~100RPM and a maximum liquid delivery speed of 400mL / min.
[0015] In this solution, the pump tube gland is used to cooperate with the roller sleeve to squeeze the pump tube, so that a closed volume is generated between the two roller sleeves. The pump tube gland is made of aluminum alloy, and its surface in contact with the pump tube is anodized to further increase the life of the part itself, while storing an appropriate amount of grease to reduce the wear of the pump tube.
[0016] In this solution, the inner contour of the pump tube gland is an open structure and transition surfaces are designed at both ends. To replace the pump tube, you only need to loosen the locking pressure plate to remove the pump tube gland. The transition surfaces at both ends avoid sudden stress changes in the pump tube. At the same time, combined with the two sections of the center axis and the middle axis end cover, the pump tube can be smoothly introduced into the extrusion chamber, thereby increasing the service life of the pump tube.
[0017] In this solution, in order to increase the service life of the pump tube and the roller sleeve, the roller sleeve in contact with the pump tube is made of SUS304 material, and its outer surface is polished to reduce the friction between the roller sleeve and the pump tube; a double ball bearing is used inside the roller sleeve to eliminate the relative displacement between the roller sleeve and the pump tube by reducing the friction.
[0018] In this solution, the center shaft and the middle shaft end cover are positioned by sampling square embedded transition fits, and the relative position between the three groups of rollers is made zero offset under the three locking screws. By placing different precision gaskets on both sides of the rollers, the roller movement is reduced as much as possible, and the preload force of the bearing is adjusted at the same time.
[0019] In this solution, the pump rear cover and the pump front cover are made of aluminum alloy. The outer end face of the pump rear cover is used to achieve a positioning connection with the motor support plate, and can also be positioned and connected with the pump front cover of another pump to be connected in parallel; the inner end face is positioned and connected with the pump front cover of its own pump, and a pump pipe guide hole is provided at the bottom of the pump rear cover. When a hard pipe joint is inserted into the pump pipe, the outer wall of the pump pipe expands, and the guide hole just fixes the pump pipe; the guide hole is arc-treated all around to avoid wear of the pump pipe when the pump is working in forward and reverse directions.
[0020] In this solution, the stepper motor is a 57 stepper motor, and the shaft head is customized as a flat package, which can be inserted into the groove of the center shaft to transmit torque. If only one pump is driven, a standard short-shaft motor with a torque of 1.2Nm is used; when multiple pump heads are used in parallel assembly, a long-shaft motor with a torque of 2.5NM is selected. At this time, up to 5 pump heads can be connected in parallel.
[0021] In this solution, the locking pressure plate uses the lever principle to fix the gap between the pump tube gland and the roller sleeve through the pre-tightening force of the high-foot screw and the disc spring. The disc spring provides a certain elastic space for the pump tube, improving the durability. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 FIG. is a schematic three-dimensional structure diagram of a durable all-metal peristaltic pump set proposed by the present utility model;
[0023] Figure 2 FIG. is a schematic top view structure diagram of a durable all-metal peristaltic pump set proposed by the present utility model;
[0024] Figure 3 FIG. is a schematic cross-sectional structure diagram of a durable all-metal peristaltic pump set proposed by the present utility model.
[0025] LEGEND DESCRIPTION:
[0026] 1. Progressive motor; 2. Central shaft; 3. Middle shaft end cover; 4. Deep groove ball bearing I; 5. Roller shaft; 6. Roller sleeve; 7. Precision gasket I; 8. Deep groove ball bearing II; 9. Precision gasket II; 10. Socket head cap screw; 11. Motor support plate; 12. Pump rear cover; 13. Pump front cover; 14. Pump tube gland; 15. Locking pressure plate; 16. High-foot screw; 17. Disc spring; 18. Dust cover. SPECIFIC EMBODIMENTS
[0027] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a durable all-metal peristaltic pump set, including a progressive motor 1. One end of the progressive motor 1 is installed with a motor support plate 11. One side of the motor support plate 11 is installed with a pump rear cover 12 through screws. One side of the pump rear cover 12 is installed with a pump front cover 13 through bolts. There are three groups of the pump rear cover 12 and the pump front cover. The three groups of the pump rear cover 12 and the pump front cover are sequentially distributed on the output side of the progressive motor 1. A pump tube gland 14 is arranged between the pump rear cover 12 and the pump front cover 13. A high-foot screw 16 is arranged on the inner wall of the pump front cover 13. A locking pressure plate 15 is arranged in the inner wall of the pump rear cover 12. A disc spring 17 is sleeved on the surface of the locking pressure plate 15. The inner walls of the three groups of the pump rear cover 12 and the pump front cover 13 are all provided with a central shaft 2. Two middle shaft end covers 3 are arranged on the surface of the central shaft 2. The two middle shaft end covers 3 are installed by screws. Three groups of roller shafts 5 are arranged between the two middle shaft end covers 3. Roller sleeves 6 are installed on the surfaces of the three groups of roller shafts 5.
[0028] In this embodiment: The central axis 2 and the central axis end cover 3 are positioned by a square embedded transition fit. The stepping motor 1 can drive the central axis 2, the central axis end cover 3, and the three sets of roller sleeves 6 to rotate, so as to achieve output. When replacing the pump tube, only the locking pressure plate 15 needs to be loosened to remove the pump tube gland 14. The pump tube gland 14 is used to cooperate with the roller sleeve 6 to squeeze the pump tube, so as to generate a sealed volume between the two roller sleeves 6. The pump tube gland 14 is made of aluminum alloy, and the surface in contact with the pump tube is anodized to further improve the service life of the part itself. At the same time, an appropriate amount of grease is stored to reduce the wear of the pump tube.
[0029] Specifically, the inner contour of the pump tube gland 14 is an open structure and transition surfaces are designed at both ends. Through the above components, when replacing the pump tube, only the locking pressure plate 15 needs to be loosened, and the pump tube gland 14 can be taken out from the pump tube gland 14. The transition surfaces at both ends avoid the stress mutation of the pump tube. At the same time, combined with the two cross-sections of the central axis 2 and the central axis end cover 3, the pump tube can be smoothly introduced into the extrusion chamber, improving the service life of the pump tube.
[0030] Specifically, a deep groove ball bearing I 4 is arranged between the roller shaft 5 and the roller sleeve 6. Deep groove ball bearings II 8 are arranged on the inner walls of the pump front cover 13 and the pump rear cover 12. The deep groove ball bearing II 8 allows the central axis 2 to pass through.
[0031] In this embodiment: The deep groove ball bearing I 4 and the deep groove ball bearing II 8 can reduce wear.
[0032] Specifically, a precision gasket I 7 is arranged between the central axis end cover 3 and the deep groove ball bearing I 4, and a precision gasket II 9 is arranged between the central axis end cover 3 and the deep groove ball bearing II 8.
[0033] Specifically, the head and tail of the central axis 2 are concave-convex structures.
[0034] In this embodiment: The head and tail are concave-convex structures, which are connected to the stepping motor 1 and are also used to connect the previous peristaltic pump. The concave-convex structures at both ends are staggered by a certain angle in the axial direction. When multiple pump heads are connected in parallel, it can avoid multiple roller sleeves 6 from being stressed simultaneously, reducing the impact of the sudden load on the motor, and the motor efficiency is higher.
[0035] Specifically, a dust cover 18 is installed at the shaft head of the central axis 2.
[0036] In this embodiment: The dust cover 18 is made of PA material and is installed at the shaft head of the central axis 2 to prevent dust from entering the bearing. At the same time, it plays an indicating role when the pump head rotates.
[0037] Specifically, the screw is a countersunk hexagon socket head screw 10, and all the screws described above are countersunk hexagon socket head screws 10.
[0038] Specifically, the three sets of roller sleeves 6 are arranged at equal intervals and are evenly distributed around the central axis 2 at 120 degrees.
[0039] In this embodiment: The rolling sleeves 6 are evenly distributed around the central axis 2 at 120 degrees. The inner contour of the pump tube gland 14 and the movement track of the rolling sleeves 6 provide a sealing chamber for the pump tube within a range of 180 degrees. The structure of the three rolling sleeves 6 reduces the multiple extrusion of the pump tube and extends the service life of the pump tube. The rolling sleeves 6 are made of SUS304 material, and their outer surfaces are polished to reduce the friction between the rolling sleeves 6 and the pump tube.
[0040] Working principle: When in use, the pump tube can be placed in the pump head. By utilizing the concave-convex structure of the central axis 2, it is connected to the stepping motor 1 and is also used to connect to the previous peristaltic pump. The concave-convex structures at both ends are offset by a certain angle in the axial direction. Subsequently, the stepping motor 1 can drive multiple central axes 2 and the central axis end plates to rotate. The two shaft seat end plates drive the three groups of rolling sleeves 6 to rotate. The inner contour of the pump tube gland 14 and the movement track of the rolling sleeves 6 provide a sealing chamber for the pump tube within a range of 180 degrees. The structure of the three rollers reduces the multiple extrusion of the pump tube and extends the service life of the pump tube. At the same time, the locking pressing plate 15 uses the lever principle to fix the gap between the pump tube gland 14 and the rolling sleeves 6 through the pre-tightening force of the high-foot screws 16 and the disc spring. The disc spring 17 provides a certain elastic space for the pump tube, so that the rolling sleeves 6 cooperate with the pump tube to achieve the effect of conveying with multiple groups of combined pump heads.
Claims
1. A durable all-metal peristaltic pump assembly, comprising a progressive motor (1), characterized in that: A motor support plate (11) is installed at one end of the progressive motor (1), a pump rear cover (12) is installed on one side of the motor support plate (11) by means of screws, a pump front cover (13) is installed on one side of the pump rear cover (12) by means of bolts, the pump rear cover (12) and the pump front cover (13) are provided in three groups, the three groups of the pump rear covers (12) and the pump front covers (13) are sequentially distributed on the output side of the progressive motor (1), the pump rear cover (12) and the pump front cover (13) brackets are provided with pump pipe glands (14), the inner surface of the pump front cover (13) is provided with a pump pipe gland (14), and the inner surface of the pump front cover (13) is provided with a pump pipe gland (14). The wall is provided with a high-foot screw (16), the inner wall of the pump rear cover (12) is provided with a locking pressure plate (15), the surface of the locking pressure plate (15) is sleeved with a disc spring (17), the inner walls of the three groups of the pump rear covers (12) and the pump front covers (13) all have a central axis (2), the surface of the central axis (2) is provided with two central axis end covers (3), the two central axis end covers (3) are installed with screws, three groups of rollers (5) are provided between the central axis end covers (3), and the surfaces of the three groups of rollers (5) are installed with roller sleeves (6).
2. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: The inner contour of the pump pipe gland (14) is an open structure and transition curved surfaces are designed at both ends.
3. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: A deep groove ball bearing 1 (4) is arranged between the roller (5) and the roller sleeve (6), and a deep groove ball bearing 2 (8) is arranged on the inner wall of the pump front cover (13) and the pump rear cover (12), and the central shaft (2) passes through the deep groove ball bearing 2 (8).
4. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: A precision gasket one (7) is provided between the middle shaft end cover (3) and the deep groove ball bearing one (4), and a precision gasket two (9) is provided between the middle shaft end cover (3) and the deep groove ball bearing two (8).
5. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: The head and tail of the central axis (2) are concave-convex structures.
6. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: A dust cover (18) is installed at the shaft head of the central shaft (2).
7. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: The screw is a hexagon socket countersunk screw (10).
8. A durable all-metal peristaltic pump assembly according to claim 1, characterized in that: The three groups of roller sleeves (6) are arranged at equal intervals and are evenly distributed around the central axis (2) at an angle of 120 degrees.