Peristaltic pump

Abstract

The utility model relates to a peristaltic pump. The peristaltic pump comprises a back plate, a shell, a rotating wheel, a gland, a gland spring and a driving piece, and the shell and the back plate are connected to form a containing space; the rotating wheel is rotatably mounted in the accommodating space; the gland is movably installed in the containing space and is opposite to the rotating wheel in position. One end of the gland spring is connected with one end, far away from the rotating wheel, of the gland, and the other end of the gland spring is connected with the inner wall of the shell; and the driving piece is mounted on the back plate and is in driving connection with the rotating wheel. According to the peristaltic pump, the movable gland is arranged, and the gap between the gland and the rotating wheel can be adjusted by moving the gland, so that the peristaltic pump is adaptive to hoses with different thicknesses.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and in particular to a peristaltic pump that can be adapted to pump tubes of different thicknesses. Background Technology

[0002] A peristaltic pump is a device used to deliver fluids. It typically consists of a pump head and a tubing. The pump head compresses the tubing, causing the fluid to flow within it. Because the fluid in a peristaltic pump flows only within the tubing, it is protected from external contamination. Simultaneously, the pump head's compression of the tubing creates a good seal, effectively preventing backflow. Based on these characteristics, peristaltic pumps are widely used in the medical field. For example, in dental treatment equipment, many peristaltic pump structures require the delivery of fluids, such as dental implant machines and ultrasonic bone scalpel machines. These pumps deliver sterile water into the patient's mouth to cool the heat generated during surgery. However, the tubing specifications in peristaltic pumps used in different devices and scenarios vary. Simply replacing the tubing with a different thickness may lead to a mismatch between the tubing and the pump head, resulting in poor fluid delivery. Therefore, there is an urgent need for a peristaltic pump that can adapt to pump tubing of different thicknesses. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a peristaltic pump.

[0004] A peristaltic pump includes a back plate, a housing, a rotor, a pressure cap, a pressure cap spring, and a drive component. The housing is connected to the back plate to form an accommodating space. The rotor is rotatably mounted in the accommodating space. The pressure cap is movably mounted in the accommodating space and is positioned opposite to the rotor. One end of the pressure cap spring is connected to the end of the pressure cap away from the rotor, and the other end is connected to the inner wall of the housing. The drive component is mounted on the back plate and is drivenly connected to the rotor.

[0005] The peristaltic pump of this invention features a movable pressure cap. By moving the pressure cap, the gap between the pressure cap and the rotating wheel can be adjusted, thereby adapting to hoses of different thicknesses. Compared to existing technologies, this invention achieves adaptation to hoses of different thicknesses using a simple structure. Different specifications of hoses can be replaced as needed during use, improving the applicability of the peristaltic pump and expanding its application scenarios.

[0006] Furthermore, there are two cap springs, installed on the left and right sides of the cap away from the rotating wheel. By installing two cap springs on each side of the cap, the cap is subjected to uniform elastic force on both sides, ensuring that the cap applies uniform pressure to the hose and improving the liquid delivery performance.

[0007] Furthermore, the rotating wheel includes a wheel base, wheel posts, and wheel bodies. The wheel base has an I-beam structure, with three through holes on each of the two wheel surfaces, and the angle between the line connecting adjacent through holes and the central axis is 120°. There are three wheel posts, each correspondingly engaged in one of the through holes. There are also three wheel bodies, each correspondingly fitted onto one of the wheel posts. By evenly arranging the rotating wheel structure, it can be ensured that at least one wheel body is always in contact with and compresses the hose during rotation, effectively improving the sealing performance.

[0008] Furthermore, the end of the pressure cap near the rotating wheel has an arc structure with a central angle of 120° and a radius comparable to that of the rotating wheel. This design, matching the shape of the pressure cap to the rotating wheel, ensures that the rotating wheel and pressure cap clamp the hose tightly during operation, further improving sealing performance.

[0009] Furthermore, it also includes a rotating mechanism, and the housing is divided into an upper housing and a lower housing that abut against each other. The upper housing is rotatably connected to the back plate via the rotating mechanism, and the lower housing is fixed to the back plate. The rotating mechanism includes a rotating shaft, the fixed part of which is fixed to the upper housing, and the rotating part of which is fixed to the back plate. With the rotating mechanism and the upper and lower housings, the peristaltic pump can be opened by rotating the upper housing, facilitating hose replacement.

[0010] Furthermore, it also includes a locking mechanism, which comprises a latch, a button, and a button spring. The latch is fixed to the inner side of the upper housing and extends into the lower housing. The lower housing has a through button hole relative to the latch, and the button is installed in the button hole. The side of the button facing the latch has a slot for engaging with the latch. The button spring is installed inside the button, with one end connected to the button and the other end abutting against the back plate. By setting up the locking mechanism, the upper housing is locked, preventing it from rotating freely.

[0011] Furthermore, the rotating mechanism also includes a rotating rod, a turntable, and a rotating spring. The rotating rod is fixed to the rotating part of the rotating shaft, and the turntable is fixed to the back of the back plate and is positioned opposite to the rotating rod. One end of the rotating spring is fixed to the rotating rod, and the other end abuts against the turntable. The upper housing can be rotated more easily using the elastic force of the rotating spring.

[0012] Furthermore, the rotating mechanism also includes a damper mounted on the rotating shaft. By providing a certain resistance to the rotating rod, the damper prevents the upper housing from rotating too quickly and reduces the impact force of the upper housing's rotation.

[0013] Furthermore, it also includes a baffle plate, which is installed on the back of the upper housing and together with the upper housing forms an accommodating space for installing the pressure cap. The baffle plate and the upper housing together clamp the pressure cap to prevent the pressure cap from falling off when the upper housing is rotated.

[0014] Furthermore, the two ends of the pressure cap that contact the upper housing and the baffle are provided with small protruding bosses. These small bosses reduce the contact area of ​​the pressure cap, decrease frictional resistance, and improve the smoothness of the pressure cap's sliding motion.

[0015] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the peristaltic pump of this utility model;

[0017] Figure 2 This is an exploded view of the peristaltic pump in Example 1;

[0018] Figure 3 This is an exploded view of the rotor in Example 1;

[0019] Figure 4 This is a schematic diagram of the back of the peristaltic pump in Example 2;

[0020] Figure 5 This is a schematic diagram of the upper casing in the open state in Example 2;

[0021] Figure 6 This is an exploded view of the locking mechanism in Example 2;

[0022] Figure 7 This is a schematic diagram of the rotating mechanism in Example 2. Detailed Implementation

[0023] Example 1

[0024] Please see Figure 1-3 A peristaltic pump includes a back plate 10, a housing 20, a rotor 30, a pressure cap 40, a pressure cap spring 50, and a drive unit 60. The housing 20 is connected to the back plate 10 to form an accommodating space. The rotor 30 and the pressure cap 40 are installed within the accommodating space, and a flexible tube passes through the gap between the rotor 30 and the pressure cap 40. The pressure cap spring 50 is connected to the pressure cap 40 and is used to adjust the position of the pressure cap 40 to change the gap between the rotor 30 and the pressure cap 40, thereby adapting to flexible tubes of different thicknesses. The drive unit 60 drives the rotor 30 to rotate, thereby transporting liquid in the flexible tube.

[0025] Please see Figure 2The housing 20 has an inlet on the left and an outlet on the right, allowing the flexible tube to enter the accommodating space within the housing 20 through the inlet and exit through the outlet. The rotating wheel 30 is rotatably mounted within the accommodating space, and the pressure cap 40 is movably mounted above the rotating wheel 30. One end of the pressure cap spring 50 is connected to the end of the pressure cap 40 away from the rotating wheel 30, and the other end is connected to the inner side of the housing 20. The pressure cap spring 50 applies a spring force to the pressure cap 40, causing the pressure cap 40 to tend to move closer to the rotating wheel 30. Preferably, there are two pressure cap springs 50, respectively installed on the left and right sides of the end of the pressure cap 40 away from the rotating wheel 30, so that the spring force on the left and right sides of the pressure cap 40 is equal. The hose passes between the rotating wheel 30 and the pressure cap 40. Under the elastic force of the pressure cap spring 50, the pressure cap 40 clamps the hose together with the rotating wheel 30. When changing hoses of different thicknesses, the pressure cap 40 can move a corresponding distance to adjust the gap between itself and the rotating wheel 30, thereby ensuring that the pressure cap 40 and the rotating wheel 30 always clamp the hose tightly. The drive component 60 is installed on the side of the back plate 10 opposite to the housing 20, and the back plate 10 has a through connection hole. The position of the connection hole is opposite to the position of the rotating wheel 30, and the drive component 60 is driven to the rotating wheel 30 through the connection hole. During operation, the drive component 60 drives the rotating wheel 30 to rotate, thereby transporting the liquid in the hose.

[0026] Please see Figure 3 Preferably, the rotating wheel 30 includes a wheel seat 31, wheel posts 32, and wheel bodies 33. The wheel seat 31 has an I-beam structure, with three through holes on the upper and lower wheel surfaces, respectively, and the angle between the line connecting adjacent through holes and the central axis is 120°. There are three wheel posts 32, each correspondingly fitted into one of the through holes. There are also three wheel bodies 33, each correspondingly fitted onto one of the wheel posts 32, with the outer edge of a correctly installed wheel body 33 flush with the outer edge of the wheel seat 31. Correspondingly, the end of the pressure cap 40 near the rotating wheel 30 has an arc structure with a central angle of 120° and a radius approximately equal to the radius of the rotating wheel 30. These structural designs ensure that at least one wheel body 33 and the pressure cap 40 always clamp the hose together during the rotation of the rotating wheel 30, improving the hose's sealing performance.

[0027] In use, the hose is installed between the rotating wheel 30 and the pressure cap 40. The pressure cap 40, under the elastic force of the pressure cap spring 50, automatically clamps the hose together with the rotating wheel 30. Activating the drive unit 60 drives the rotating wheel 30 to rotate, allowing liquid to be delivered through the hose. When it is necessary to replace the hose with one of different thicknesses, press the pressure cap 40 upwards to release the pressure on the hose. After replacing the old hose with the new one, release the pressure cap 40. The pressure cap 40 will automatically spring back and clamp the hose, achieving automatic adaptation to different hose specifications without additional operation.

[0028] Example 2

[0029] Please see Figure 4-7 This embodiment has a structure that is basically the same as that of Embodiment 1, except that the housing 20 is divided into an upper housing 21 and a lower housing 22, and a rotating mechanism 70 is also provided. In Embodiment 1, when replacing the hose, the back plate 10 needs to be separated from the housing 20, which is too cumbersome. In this embodiment, by separating the housing 20 into an upper housing 21 and a lower housing 22, and providing a rotating mechanism 70 for rotating and opening the upper housing 21, the replacement of the hose can be completed simply by opening the upper housing 21, greatly simplifying the operation process.

[0030] Specifically, the housing 20 is divided into an upper housing 21 and a lower housing 22 that abut against each other. The upper housing 21 is rotatably connected to the back plate 10 via a rotating mechanism 70, and the lower housing 22 is fixed to the back plate 10. The pressure cap 40 is installed in the upper accommodating space formed by the upper housing 21 and the back plate 10, and the rotating wheel 30 is installed in the lower accommodating space formed by the lower housing 22 and the back plate 10.

[0031] The rotating mechanism 70 includes a rotating shaft 71. The fixed portion of the rotating shaft 71 is fixed to the upper housing 21, and the rotating portion of the rotating shaft 71 passes through the back plate 10, is located at the end opposite to the upper housing 21, and is fixed to the back plate 10 by a self-tightening screw 72. Rotating the rotating shaft 71 causes the upper housing 21 to rotate relative to the back plate 10, thereby opening the accommodating space formed by the housing 20 and the back plate 10, and separating the pressure cap 40 from the rotating wheel 30, facilitating hose replacement.

[0032] Please see Figure 5 and 6Preferably, a locking mechanism 80 is also included to lock the upper housing 21 and prevent it from rotating freely. The locking mechanism 80 includes a latch 81, a button 82, and a button spring 83. The latch 81 is fixed to the inside of the upper housing 21 and extends into the lower housing 22. The lower housing 22 has a through button hole relative to the latch 81, and the button 82 is installed in the button hole. The button 82 is a hollow cylindrical structure with a slot 84 on the side facing the latch for engaging with the latch 81. The button spring 83 is installed inside the button 82, with one end connected to the button 82 and the other end abutting against the back plate 10. In the normal state, the latch 81 extends into the slot 84 to engage, locking the upper housing 21 and the lower housing 22 and preventing the upper housing 21 from rotating; when unlocking is required, pressing the button 82 separates the slot 84 from the latch 81, releasing the upper housing 21 and allowing it to rotate freely.

[0033] Please see Figure 7 More preferably, the rotating mechanism 70 further includes a rotating rod 73, a turntable 74, and a rotating spring 75. The rotating rod 73 is fixed to the rotating part of the rotating shaft 71, and the turntable 74 is fixed to the back of the back plate 10 and is positioned opposite to the rotating rod 73. One end of the rotating spring 75 is fixed to the rotating rod 73, and the other end abuts against the turntable 74. When the upper housing 2 is in the locked state, the rotating spring 75 is compressed by the rotating rod 73 and the turntable 74; when the button 82 is pressed to unlock the upper housing 21, the rotating spring 75 applies a spring force to the rotating rod 73, causing the rotating rod 73 to move away from the turntable 74 and thereby causing the upper housing 21 to rotate at a certain angle, thus achieving automatic separation of the upper housing 21 and the lower housing 22.

[0034] More preferably, the rotating mechanism 70 further includes a damper 76, which is mounted on the rotating shaft 71 to generate a certain resistance to the rotating shaft 71, thereby preventing the upper housing 21 from rotating too fast and reducing the impact force when the upper housing rotates.

[0035] More preferably, a baffle 23 is also included. The baffle 23 is installed on the back of the upper housing 21. When the upper housing 21 is rotated open, it can clamp the pressure cap 40 together with the upper housing 21 to prevent the pressure cap 40 from falling off. Correspondingly, the two ends of the pressure cap 40 that contact the upper housing 21 and the baffle 23 are provided with protruding small bosses 41, which can reduce the contact area between the pressure cap 40 and the upper housing 21 and the baffle 23, reduce frictional resistance, and enhance the smoothness of the sliding of the pressure cap 40. Furthermore, the upper housing 21 or the baffle 23 is provided with limit blocks to restrict the movement position of the pressure cap 40. The position of the limit blocks can be adjusted according to different needs, thereby obtaining different movement ranges of the pressure cap 40 and effectively adapting to the application requirements of different scenarios.

[0036] In use, press button 82 to unlock the locking mechanism 80, open the upper housing 21, and place the hose along the path of the inlet, rotating wheel 30, and outlet. Then, rotate and close the upper housing 21. The pressure cap 40 will automatically tighten the hose, completing the hose assembly of the peristaltic pump. When it is necessary to replace the hose with one of different thicknesses, repeat the above steps. The pressure cap 40 automatically adapts to hoses of different thicknesses under the action of the pressure cap spring 50, without the need for additional adjustments.

[0037] Compared to existing technologies, the peristaltic pump of this invention features a movable pressure cap. By moving the pressure cap, the gap between the pressure cap and the rotating wheel can be adjusted, thereby adapting to hoses of different thicknesses. Compared to existing technologies, this invention utilizes a simple structure to adapt to hoses of different thicknesses, allowing for the replacement of hoses of different specifications as needed during use, thus improving the applicability of the peristaltic pump and expanding its application scenarios.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A peristaltic pump characterized by: The application relates to a drive device, which comprises a back plate, a shell, a rotating wheel, a pressing cover, a pressing cover spring and a driving part, the shell is connected with the back plate to form a containing space, the rotating wheel is rotatably installed in the containing space, the pressing cover is movably installed in the containing space and is opposite to the rotating wheel, one end of the pressing cover spring is connected with one end of the pressing cover away from the rotating wheel, and the other end is connected with the inner wall of the shell, and the driving part is installed on the back plate and is drivingly connected with the rotating wheel.

2. The peristaltic pump of claim 1, wherein: The number of the pressing cover springs is two, and the two pressing cover springs are installed on the left and right sides of one end of the pressing cover away from the rotating wheel.

3. The peristaltic pump of claim 2, wherein: The rotating wheel comprises a wheel base, wheel columns and wheel bodies, the wheel base is in an I-shaped wheel structure, two wheel surfaces are respectively provided with three position-opposite through holes, and the included angle between adjacent through holes and the center axis is 120 DEG; the number of the wheel columns is three, and the wheel columns are correspondingly clamped in the through holes; the number of the wheel bodies is also three, and the wheel bodies are correspondingly sleeved on the wheel columns.

4. The peristaltic pump of claim 3, wherein: One end of the pressing cover close to the rotating wheel is in a circular arc structure, and the central angle of the circular arc structure is 120 DEG, and the radius is equivalent to the radius of the rotating wheel.

5. A peristaltic pump according to any one of claims 1 to 4 wherein: The application further comprises a rotating mechanism, and the shell is divided into an upper shell and a lower shell which are abutted, the upper shell is rotatably connected with the back plate through the rotating mechanism, and the lower shell is fixedly connected with the back plate; the rotating mechanism comprises a rotating shaft, a fixed part of the rotating shaft is fixedly connected with the upper shell, and a rotating part of the rotating shaft is fixedly connected with the back plate.

6. The peristaltic pump of claim 5, wherein: The application further comprises a locking mechanism, the locking mechanism comprises a buckle, a button and a button spring; the buckle is fixedly connected with the inner side of the upper shell and extends into the lower shell; a through button hole is formed in the position of the lower shell relative to the buckle, the button is installed in the button hole, a clamping groove is formed in the side of the button facing the buckle for clamping the buckle, and the button spring is installed in the button and connected with one end of the button and the other end of the back plate.

7. The peristaltic pump of claim 6, wherein: The rotating mechanism further comprises a rotating rod, a rotating table and a rotating spring, the rotating rod is fixedly connected with the rotating part of the rotating shaft, the rotating table is fixedly connected with the back surface of the back plate and opposite to the position of the rotating rod, and one end of the rotating spring is fixedly connected with the rotating rod and the other end is abutted with the rotating table.

8. The peristaltic pump of claim 7, wherein: The rotating mechanism further comprises a damper, and the damper is installed on the rotating shaft.

9. The peristaltic pump of claim 8, wherein: The application further comprises a baffle, the baffle is installed on the back surface of the upper shell and forms a containing space for installing the pressing cover together with the upper shell.

10. The peristaltic pump of claim 9, wherein: The two ends of the pressing cover contacting with the upper shell and the baffle are provided with protruding small bosses.

Images