Quick-changeable peristaltic pump head

Abstract

This invention provides a quick-replaceable peristaltic pump head, comprising a coupling, a connecting rod, and a peristaltic wheel structure. The coupling is connected to a drive mechanism for rotational drive. The lower end of the connecting rod is detachably mounted in a circular hole in the coupling, while the upper end is integrally formed with the peristaltic wheel. An annular groove is provided on the outer side of the peristaltic wheel, within which multiple rotatable rollers are evenly distributed for squeezing the pipe to achieve liquid transport. A quick-locking mechanism consisting of a limit rod, steel balls, and a spring is provided between the coupling and the connecting rod. Pressing a button releases the limit, allowing for quick disassembly and replacement of the peristaltic wheel. A fixing plate and a pipe pressure plate are provided on the front side of the drive mechanism. An arc-shaped pressure groove is provided below the pipe pressure plate for stable pipe clamping. Limit bolts allow for the assembly and disassembly of the pressure plate. This structure allows for quick replacement of the peristaltic wheel without tools, significantly improving maintenance efficiency. Adjustable spring pressure enables flexible control of the limit strength. The device is compact, easy to assemble and disassemble, and operates stably, making it suitable for various types of peristaltic pump systems.

Description

Technical Field

[0001] This utility model relates to the field of liquid pump technology, and in particular to a peristaltic pump head that can be quickly replaced. Background Technology

[0002] A peristaltic pump is a commonly used pumping device for liquid transfer and metering. Its working principle involves a rotating peristaltic wheel driving a roller to compress a flexible pipe, causing the liquid inside to flow continuously along the compression direction, thus achieving both transport and metering functions. Because the liquid only contacts the inner wall of the pipe, peristaltic pumps offer advantages such as a clean transport process, low pollution, and easy maintenance, and are widely used in pharmaceuticals, biochemistry, environmental protection, and food processing.

[0003] However, existing peristaltic pumps generally suffer from inconvenient pump head assembly and disassembly, and low maintenance efficiency in practical use. Traditional pump heads are mostly fixed with screws or pins. If the peristaltic wheel or roller shaft wears, multiple fasteners need to be disassembled using tools, which is a complicated and time-consuming process and can easily cause positioning deviations or assembly errors, affecting the pump's operational stability. In addition, some pump heads use manual clamps or fixed cover plates for the pipe clamping device, and the clamping force is not adjustable, which can easily lead to uneven pipe clamping or slippage, thus affecting flow accuracy and service life.

[0004] Meanwhile, most existing peristaltic pump heads are integrally cast or have a closed structure. When the peristaltic wheel needs to be replaced, the entire pump head assembly often needs to be disassembled, resulting in high maintenance costs and long downtime.

[0005] To address the aforementioned issues, there is an urgent need for a peristaltic pump head that is simple in structure, easy to assemble and disassemble, has reliable positioning, and can be quickly replaced, in order to improve the maintenance efficiency and operational stability of the equipment. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a peristaltic pump head that can be quickly replaced.

[0007] The purpose of this utility model is achieved as follows: a peristaltic pump head that can be quickly replaced includes a coupling, which is connected to a drive mechanism. The drive mechanism drives the coupling to rotate. A connecting rod is detachably installed inside the coupling. A circular hole is opened in the middle of the upper end of the coupling. The lower end of the connecting rod is located in the circular hole and can move up and down. A peristaltic wheel is installed at the upper end of the connecting rod. An annular groove is opened in the middle of the outer side of the peristaltic wheel. Multiple rotatable rollers are evenly arranged in the annular groove. The connecting rod and the peristaltic wheel are an integral structure.

[0008] The connecting rod has a lifting groove, a spring groove at the top, and a button groove at the top. A limit rod that can move up and down is installed in the lifting groove. Multiple through holes are evenly distributed on the connecting rod on the side of the lifting groove, and steel balls are installed in the through holes. A corresponding limit hole is opened on the side of the circular hole on the coupling corresponding to the through hole. The steel ball is movable and located in the limit hole. The lower outer side of the limit rod is clearance-fitted with the lifting groove. The middle part of the limit rod has a conical surface structure, and the upper part of the limit rod has a rod-shaped structure. A button is threaded to the upper end of the limit rod. The button that can move up and down is located in the button groove. A spring is installed in the spring groove. The lower end of the spring is connected to the bottom of the spring groove, and the upper end of the spring is connected to the button.

[0009] The drive mechanism is fixed to the upright plate, and the output end of the drive mechanism passes through the upright plate. A fixed plate is fixedly connected to the front side of the drive mechanism. A pipe pressure plate is detachably installed at the upper end of the fixed plate. An arc-shaped pressure groove is opened in the middle of the lower surface of the pipe pressure plate. The lower part of the arc-shaped pressure groove is a rectangular groove structure. The arc-shaped pressure groove is located above the annular groove. Two through holes are symmetrically opened on the fixed plate. Fastening holes are respectively provided on the outer side of the two through holes. The lower end of the pipe pressure plate is connected to the fixed plate by a limiting bolt. The limiting bolt passes through the fastening hole and the pipe pressure plate is threaded.

[0010] Beneficial effects: This utility model has the following technical effects when used:

[0011] 1. This application incorporates a quick-release structure at the connection between the coupling and the connecting rod, consisting of a limit rod, a steel ball, and a spring. During use, simply pressing the button releases the locking engagement between the steel ball and the limit hole, allowing for quick disassembly of the peristaltic wheel assembly without the need for special tools. Compared to traditional methods using bolts and pins, this avoids the tedious process of multiple tightening or alignment operations, reducing pump head replacement time from several minutes to tens of seconds, significantly improving the convenience of maintenance and cleaning.

[0012] 2. By engaging the conical center of the limiting rod with the spherical surface of the steel ball, the steel ball is reliably engaged in the limiting hole of the coupling under the action of the return spring, achieving automatic positioning and self-locking, and ensuring stable engagement of the peristaltic wheel during high-speed rotation. Compared with existing technologies that rely solely on friction or positioning pins for fixing, this structure combines quick disassembly with stable operation, avoiding the risk of the pump head shaking or falling off after prolonged operation; the self-locking structure is reliable, preventing loosening during operation.

[0013] 3. In this design, the upper end of the limit rod is connected to a button via a thread, and a spring groove and spring are provided below the button. The operator can change the spring compression by rotating the button, thereby adjusting the locking force of the limit structure. This structure can adapt to the assembly requirements of peristaltic wheels of different sizes and under different load conditions, while extending the service life of the spring and the limit structure. Existing peristaltic pumps mostly use fixed rigid locking structures, which are prone to wear and loosening after long-term use. This design effectively solves this problem through an adjustable preload design; the adjustable spring force design improves versatility and durability.

[0014] 4. By setting up a pipe pressure plate, an arc-shaped pressure groove, and limiting bolt connections, a stable pressing path is formed between the arc-shaped pressure groove and the outer ring groove of the peristaltic wheel, ensuring uniform flattening between the roller and the pipe and improving the quantitative accuracy of liquid delivery. Compared to the traditional structure that fixes the pipe with clamps or manual caps, this design is simple to operate, avoids pipe slippage or uneven compression, and enhances the flow stability and repeatability of the pump. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the utility model.

[0016] Figure 2 This is a schematic diagram of the rear structure of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the pipe pressure plate of the utility model after it is opened.

[0018] Figure 4 This is a schematic diagram of the peristaltic wheel structure of a utility model.

[0019] Figure 5 This is a schematic diagram of the front structure of the peristaltic wheel of the utility model.

[0020] Figure 6 This is a cross-sectional view of the peristaltic wheel and coupling of a utility model.

[0021] Figure 7 This is a sectional view of the coupling of the utility model.

[0022] Figure 8 This is a cross-sectional view of the connecting rod of the utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Vertical plate, 2. Drive mechanism, 3. Fixed plate, 4. Pipe pressure plate, 5. Coupling, 6. Limit bolt, 7. Pipe, 8. Peristaltic wheel, 9. Button, 10. Roller, 11. Connecting rod, 12. Steel ball, 13. Limit hole, 14. Spring, 15. Upper part of limit rod, 16. Lifting groove, 17. Lower part of limit rod, 18. Middle part of limit rod. Detailed Implementation

[0025] Example 1, such as Figure 1-8 As shown, the purpose of this utility model is achieved as follows: A peristaltic pump head that can be quickly replaced includes a coupling 5, which is connected to a drive mechanism 2. The drive mechanism 2 drives the coupling 5 to rotate. A connecting rod 11 is detachably installed inside the coupling 5. A circular hole is opened in the middle of the upper end of the coupling 5. The lower end of the connecting rod 11 is located in the circular hole and can move up and down. A peristaltic wheel 8 is installed at the upper end of the connecting rod. An annular groove is opened in the middle of the outer side of the peristaltic wheel 8. Multiple rotatable rollers 10 are evenly arranged in the annular groove. The connecting rod and the peristaltic wheel 8 are integrated. A lifting groove 16 is opened inside the connecting rod. A spring groove 14 is installed at the upper end of the lifting groove 16. A button groove 9 is installed at the upper end of the spring groove 14. A limit rod is installed in the lifting groove 16, which can move up and down. Multiple through holes are evenly opened on the connecting rod on the side of the lifting groove 16. Steel balls 12 are installed in the through holes. The circular hole on the coupling 5 corresponding to the through hole is provided with a corresponding limit hole 13. The steel ball 12 is movable in the limit hole 13. The outer side of the lower part 17 of the limit rod is clearance-fitted with the lifting groove 16. The middle part 18 of the limit rod is a conical surface structure. The upper part 15 of the limit rod is a rod-shaped structure. A button 9 is threadedly connected to the upper end of the limit rod. The button 9 can move up and down and is located in the groove of the button 9. A spring 14 is installed in the groove of the spring 14. The lower end of the spring 14 is connected to the bottom of the groove of the spring 14, and the upper end of the spring 14 is connected to the button 9.

[0026] The drive mechanism 2 is fixed on the upright plate 1. The output end of the drive mechanism 2 passes through the upright plate 1. A fixed plate 3 is fixedly connected to the front side of the drive mechanism 2. A pipe pressure plate 4 is detachably installed on the upper end of the fixed plate 3. An arc-shaped pressure groove is opened in the middle of the lower surface of the pipe pressure plate 4. The lower part of the arc-shaped pressure groove is a rectangular groove structure. The arc-shaped pressure groove is located above the annular groove. Two through holes are symmetrically opened on the fixed plate 3. Fastening holes are respectively provided on the outer side of the two through holes. The lower end of the pipe pressure plate 4 is connected to the fixed plate 3 by a limiting bolt 6. The limiting bolt 6 passes through the fastening hole and is threadedly connected to the pipe pressure plate 4.

[0027] In use, pipe 7 is passed through the two through holes, and pipe 7 above the fixing plate 3 is bypassed by the annular groove, that is, the inner side of pipe 7 contacts the roller 10 in the annular groove. Then, pipe pressure plate 4 is fixed on the fixing plate 3 by limiting bolt 6. At this time, the arc-shaped pressure groove on pipe pressure plate 4 squeezes pipe 7. The roller 10 located in the arc-shaped pressure groove cooperates with the arc-shaped pressure groove on the pressure plate to squeeze pipe 7, so that pipe 7 is in a flattened state, preventing liquid from flowing inside pipe 7.

[0028] The controller then controls the drive mechanism 2 to rotate, which in turn drives the peristaltic wheel 8 to rotate. When the peristaltic wheel 8 rotates, it causes the liquid in the pipe 7 between adjacent rollers 10 to be squeezed and moved to the other side, thereby achieving a quantitative supply of liquid (the liquid supply method of the peristaltic pump is existing technology and will not be described in detail). The controller is also existing technology and will not be described in detail. It is sufficient to achieve the functions required by this application.

[0029] When the peristaltic wheel 8 needs to be replaced, remove the pipe pressure plate 4 and press the button 9. This causes the spring 14 to contract under pressure, the limit rod to move inward, and the middle part 18 of the limit rod to release the squeezing effect on the steel ball 12. The peristaltic wheel 8 is pulled outward, and the steel ball 12 is pulled outward by the force to disengage from the limit hole 13 on the coupling 5 (the outer surface of the steel ball 12 is an arc-shaped structure, and the connection between the steel ball 12 and the limit hole 13 is an arc-shaped surface smaller than a semicircle, so the steel ball 12 can be driven to disengage from the limit hole 13 under the action of external force). The steel ball 12 moves to the middle of the connecting rod 11. At this time, the limiting effect between the connecting rod 11 and the coupling 5 is released, and the peristaltic wheel 8 can be disassembled from the coupling 5 for easy maintenance or replacement.

[0030] Example 2: A retaining ring can be provided between the coupling 5 and the connecting rod 11 as needed (a retaining ring groove can be provided on the coupling 5, and an annular groove can be provided on the connecting rod 11. The retaining ring is engaged with the annular groove on the connecting rod 11 through the retaining ring groove, and the outer side of the retaining ring is located in the retaining ring groove, thereby realizing the retaining ring's limiting effect on the coupling 5 and the connecting rod 11). When replacing the peristaltic wheel 8, the retaining ring can be removed first.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change peristaltic pump head, comprising a vertical plate, a coupling, and a drive mechanism, wherein the drive mechanism is fixed on the vertical plate, the coupling is connected to the drive mechanism, and the drive mechanism drives the coupling to rotate, characterized in that: The coupling is detachably equipped with a connecting rod, the upper end of which is equipped with a peristaltic wheel. An annular groove is formed in the middle of the outer side of the peristaltic wheel, and multiple rotatable rollers are evenly arranged in the annular groove. A limit structure is provided between the coupling and the connecting rod, which includes a limit rod and steel balls. A lifting groove is formed in the connecting rod, and a limit rod is provided in the lifting groove that can move up and down. Multiple through holes are evenly formed on the side of the connecting rod of the lifting groove, and steel balls are placed in the through holes. A corresponding limit hole is formed on the side of the circular hole on the coupling corresponding to the through hole. The steel ball is movably located in the limit hole. The lower outer side of the limit rod is clearance-fitted with the lifting groove. The middle part of the limit rod has a conical surface structure. The outer side of the steel ball can cooperate with the limit hole on the coupling to form a locking limit.

2. The peristaltic pump head that can be quickly replaced according to claim 1, characterized in that: A circular hole is provided in the middle of the upper end of the coupling, and the lower end of the connecting rod is located inside the circular hole and can move up and down.

3. The quick-change peristaltic pump head according to claim 1, characterized in that: The limiting structure also includes a spring and a button. A spring groove is provided at the upper end of the lifting groove, and a button groove is provided at the upper end of the spring groove. The upper part of the limiting rod is a rod-shaped structure, and a button is threadedly connected to the upper end of the limiting rod. The button is located in the button groove and can move up and down. A spring is provided in the spring groove, with the lower end of the spring connected to the bottom of the spring groove and the upper end of the spring connected to the button.

4. The quick-change peristaltic pump head according to claim 3, characterized in that: The button can rotate around the axis of the limiting rod. By rotating the button, the compression of the spring can be changed, thereby adjusting the locking pressure of the limiting rod on the steel ball.

5. The peristaltic pump head that can be quickly replaced according to claim 1, characterized in that: The connecting rod and the peristaltic wheel are an integral structure.

6. The peristaltic pump head that can be quickly replaced according to claim 1, characterized in that: The output end of the drive mechanism passes through the vertical plate, and a fixed plate is fixedly connected to the front side of the drive mechanism. A pipe pressure plate is detachably provided on the upper end of the fixed plate.

7. The peristaltic pump head that can be quickly replaced according to claim 6, characterized in that: An arc-shaped groove is formed in the middle of the lower surface of the pipe pressure plate. The lower part of the arc-shaped groove is a rectangular groove structure, and the arc-shaped groove is located above the annular groove.

8. The quick-change peristaltic pump head according to claim 7, characterized in that: Two through holes are symmetrically provided on the fixed plate. Fastening holes are provided on the outer side of the two through holes. Limiting bolts are provided in the fastening holes. The lower end of the pipe pressure plate is connected to the fixed plate by the limiting bolts. The limiting bolts pass through the fastening holes and are threaded to the pipe pressure plate.

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