Peristaltic pump pressure adjusting device

Abstract

The utility model relates to a peristaltic pump pressure adjusting device which comprises a pump body, a roller assembly, a pressing part and an adjusting assembly are arranged on the pump body, the roller assembly is rotatably installed on the pump body, and a pipe pressing gap is formed between the roller face of the roller assembly and the surface of the pressing part; and the pressing part is movably connected to the pump body and is configured to be capable of receiving the acting force of the adjusting assembly so as to be close to the roller assembly, so that the distance between the roller surface of the roller assembly and the surface of the pressing part is adjusted. According to the pressure adjusting device of the peristaltic pump, due to the fact that the pressure can be accurately adjusted, excessive extrusion to the hose is avoided, abrasion to the hose is effectively reduced, the precision of fluid conveying is directly improved through accurate control over the pressure, and the pressure adjusting device can be applied to application scenes needing micro-accurate control, such as filling of medical agents and the like. And the method is of great significance.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to a peristaltic pump pressure regulating device. Background Art

[0002] In the prior art, peristaltic pumps are precision fluid delivery equipment widely used in the fields of medical, chemical, food processing and environmental protection. Its working principle is to achieve directional delivery of fluid by periodically squeezing a flexible pipe. Traditional peristaltic pumps are mainly composed of a pump body, a rotor, a pressure wheel (or roller) and a hose. During operation, the rotor drives the pressure wheel to rotate, and the pressure wheel periodically squeezes the hose, thereby pushing the fluid in the tube forward.

[0003] At present, peristaltic pumps usually use fixed mechanical pressure, which is difficult to accurately adjust according to different fluid characteristics and working requirements, which may lead to unstable delivery or inaccurate flow. At the same time, since the pressure cannot be flexibly adjusted, the hose is often over-squeezed or under-pressurized, which accelerates the wear of the hose and shortens its service life. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a peristaltic pump pressure regulating device which avoids excessive squeezing of a hose and effectively reduces hose wear.

[0005] In order to achieve the above-mentioned purpose, the peristaltic pump pressure regulating device designed in the utility model includes a pump body, on which a roller assembly, a pressure portion and an regulating assembly are provided. The roller assembly is rotatably mounted on the pump body, and a pressure tube gap is formed between the wheel surface of the roller assembly and the surface of the pressure portion; the pressure portion is movably connected to the pump body, and is configured to receive the force of the regulating assembly to approach the roller assembly, thereby adjusting the distance between the wheel surface of the roller assembly and the surface of the pressure portion.

[0006] To facilitate maintenance, the pump body includes a bearing seat, a first part and a second part, wherein the first part and the second part are both detachably connected to the bearing seat; the first part and the second part jointly define a cavity and two through-tube holes connected to the cavity; the roller assembly is located in the cavity and is matched with the bearing seat; the pressing part is hinged to the second part and is located in the cavity; the power output end of the adjustment assembly is against the side of the pressing part facing away from the roller assembly.

[0007] In order to ensure uniform pressure distribution, the cavity is a cylindrical cavity, and the pressing portion is an arc-shaped plate-like structure; the pressure tube gap is formed between the inner wall surface of the arc-shaped plate-like structure and the wheel surface of the roller assembly.

[0008] A further solution is that the pressing portion at least partially extends into the tube-penetrating hole away from the side thereof hinged with the second portion, and the power output end of the regulating assembly abuts against the portion of the pressing portion disposed in the tube-penetrating hole.

[0009] A further solution is that a clearance opening is provided on the second portion, and the power output end of the regulating assembly passes through the clearance opening and abuts against the pressing portion.

[0010] In order to facilitate opening, closing and maintenance, the second part is hinged to the bearing seat, and a locking structure that locks with the first part is provided on the side of the second part away from the hinge between the second part and the bearing part.

[0011] In order to prevent the hose from being over-extruded, a limiting protrusion is provided on the second part, and a limiting groove matched with the limiting protrusion is provided on the pressing part. The cooperation between the limiting protrusion and the limiting groove is used to limit the minimum width of the pressing tube gap.

[0012] In order to achieve precise pressure control and regulation, the regulating component is a cylinder.

[0013] In order to effectively transmit force, the pressing portion has a contact surface, and the piston rod of the cylinder contacts the contact surface.

[0014] The peristaltic pump pressure regulating device designed in the utility model can accurately adjust the pressure, thereby avoiding excessive squeezing of the hose and effectively reducing the wear of the hose. The precise control of the pressure directly improves the accuracy of fluid delivery, which is particularly important in application scenarios that require micro-precision control, such as the filling of medical drugs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a peristaltic pump pressure regulating device provided in an embodiment of the present application;

[0016] Figure 2 is a schematic structural diagram of a peristaltic pump pressure regulating device provided in an embodiment of the present application from another perspective;

[0017] Figure 3 yes Figure 1 Bottom view of

[0018] Figure 4 yes Figure 3 Sectional view at AA;

[0019] Figure 5 yes Figure 3 Sectional view at the middle BB;

[0020] Figure 6 It is a three-dimensional cross-sectional view of the peristaltic pump pressure regulating device of an embodiment of the present application.

[0021] Among them: pump body 10, bearing seat 11, first part 12, second part 13, avoidance opening 131, locking structure 132, limiting protrusion 133, cavity 14, pipe through hole 15, roller assembly 20, pressing part 30, limiting groove 31, abutting surface 32, adjustment assembly 40, and pressing pipe gap 50. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Example 1.

[0024] like Figures 1 to 6 As shown, the peristaltic pump pressure regulating device described in this embodiment includes a pump body 10, on which a roller assembly 20, a pressing portion 30 and an adjusting assembly 40 are provided. The roller assembly 20 is rotatably mounted on the pump body 10, and a pressure pipe gap 50 is formed between the wheel surface of the roller assembly 20 and the surface of the pressing portion 30; the pressing portion 30 is movably connected to the pump body 10, and is configured to receive the force of the adjusting assembly 40 to approach the roller assembly 20, thereby adjusting the distance between the wheel surface of the roller assembly 20 and the surface of the pressing portion 30. In this embodiment, the adjusting assembly 40 is a cylinder.

[0025] In specific implementation, the peristaltic pump pressure regulating device can be installed in a liquid medicine filling system, and the liquid medicine delivery hose (not shown in the figure) passes through the pressure tube gap 50, and the pressure part 30 can move flexibly around its connection point to adjust the squeezing force on the hose. This adjustment is achieved through the adjustment component 40, which can apply precise force to the pressure part 30 to control the position of the pressure part 30 relative to the roller assembly 20, that is, the force of the adjustment component 40 can make the pressure part 30 gradually approach the roller assembly 20, thereby accurately changing the size of the pressure tube gap 50. Through this mechanism, the adjustment component 40 ensures that the pressure of the hose in the pump body 10 is always maintained within an appropriate and adjustable range. Subsequently, by driving the roller assembly 20 to rotate, the roller assembly 20 can intermittently squeeze the hose to achieve precise delivery of liquid medicine.

[0026] The advantage of this design is that by adjusting the component 40, the operator can accurately control the pressure tube gap 50 between the roller component 20 and the pressing part 30, which means that the pressure acting on the hose can be adjusted in real time according to specific needs. Therefore, the hose will not be over-squeezed, which greatly reduces wear and tear and significantly extends the service life. This not only improves the reliability of the equipment, but also reduces maintenance costs, while ensuring the accuracy and stability of liquid medicine delivery, which is particularly important for liquid medicine filling applications that require high-precision control.

[0027] In some embodiments, Figure 4 As shown, the pump body 10 includes a bearing seat 11, a first part 12 and a second part 13, wherein the first part 12 and the second part 13 are both detachably connected to the bearing seat 11; the first part 12 and the second part 13 jointly define a cavity 14 and two through-tube holes 15 connected to the cavity 14; the roller assembly 20 is located in the cavity 14 and matched with the bearing seat 11; the pressing part 30 is hinged to the second part 13 and is located in the cavity 14; the power output end of the adjusting assembly 40 is against the side of the pressing part 30 facing away from the roller assembly 20.

[0028] When in use, the detachable design of the first part 12 and the second part 13 provides great convenience, that is, when different medicines need to be filled, it is only necessary to replace different hoses. Specifically, the hoses pass through the two tube holes 15 in turn, enter the cavity 14, and then pass through the pressing tube gap 50 between the roller assembly 20 and the pressing part 30. The roller assembly 20 is located in the cavity 14, which ensures that the moving parts are not exposed to avoid potential risks. In addition, the adjustment assembly 40 is installed on the side away from the roller assembly 20 so that the force applied by it can directly act on the pressing part 30. This design optimizes the force transmission path, reduces energy loss, avoids unnecessary torque, and reduces possible interference with the roller assembly 20 or other components during movement.

[0029] In some embodiments, Figure 4 and Figure 5 and Figure 6 As shown, the cavity 14 is a cylindrical cavity, and the pressing portion 30 is an arc-shaped plate-like structure; the pressing tube gap 50 is formed between the inner wall surface of the arc-shaped plate-like structure and the wheel surface of the roller assembly 20 .

[0030] With this structural design, the cylindrical cavity provides a regular and stable movement space for the pressing portion 30, and the pressing portion 30 with an arc-shaped plate structure can better adapt to the movement trajectory of the roller assembly 20, that is, when the adjustment assembly 40 applies pressure, the arc-shaped pressure plate cooperates with the roller assembly 20 to evenly distribute the force to the entire hose contact surface, avoiding excessive local pressure, thereby effectively reducing the wear of the hose and extending its service life.

[0031] In some embodiments, the side of the pressing portion 30 away from the hinged connection with the second portion 13 at least partially extends into the through-tube hole 15, and the power output end of the adjustment assembly 40 abuts against the portion of the pressing portion 30 disposed in the through-tube hole 15. This design cleverly utilizes the existing through-tube hole 25 structure, simplifies the overall design, and reduces manufacturing costs.

[0032] In another embodiment, if Figure 2 and Figure 3 As shown, the second portion 13 is provided with an escape opening 131, and the power output end of the adjustment component 40 passes through the escape opening 131 and abuts against the pressing portion 30. In this embodiment, the design of the escape opening 131 allows the power output end of the adjustment component 40 to pass directly, thereby simplifying the installation process of the adjustment component 40, without the need for complex fine-tuning and fixing. This design reduces the need for additional space and is suitable for use in occasions with limited space. In this embodiment, as shown in FIG. Figure 4 and Figure 5 As shown, in order to effectively transmit force, the pressing portion 30 has a contact surface 32 , and the piston rod of the cylinder contacts the contact surface 32 .

[0033] In some embodiments, Figure 1 As shown, the second part 13 is hinged to the bearing seat 11, and a locking structure 132 is provided on the side of the second part 13 away from the hinged connection with the bearing part, which is locked with the first part 12. Through this hinged design, when maintenance and overhaul are required, the second part 13 can be conveniently opened. At the same time, since the pressing part 30 is also hinged to the second part 13, the pressing part 30 can be maintained and overhauled together when the second part 13 is opened, which effectively simplifies the operation steps and makes the maintenance and overhaul process simpler and faster.

[0034] In some embodiments, Figure 6 As shown, a limiting protrusion 133 is provided on the second part 13, and a limiting groove 31 matched with the limiting protrusion 133 is provided on the pressing part 30. The cooperation between the limiting protrusion 133 and the limiting groove 31 is used to limit the minimum width of the pressing tube gap 50. The cooperation between the limiting protrusion 133 and the limiting groove 31 provides a clear physical limit, ensuring that the minimum width of the pressing tube gap 50 is always kept within the design range, preventing the hose from being over-extruded, avoiding potential dangerous situations caused by hose rupture or blockage, and improving the overall safety of the device.

[0035] The peristaltic pump pressure regulating device provided in this embodiment can accurately adjust the pressure, thereby avoiding excessive squeezing of the hose and effectively reducing the wear of the hose. The precise control of the pressure directly improves the accuracy of fluid delivery, which is particularly important in application scenarios that require micro-precision control, such as the filling of medical drugs.

[0036] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A peristaltic pump pressure regulating device, comprising a pump body, characterized in that: The pump body is provided with a roller assembly, a pressure portion and an adjustment assembly. The roller assembly is rotatably mounted on the pump body, and a pressure tube gap is formed between the wheel surface of the roller assembly and the surface of the pressure portion. The pressure portion is movably connected to the pump body and is configured to receive the force of the adjustment assembly to approach the roller assembly, thereby adjusting the distance between the wheel surface of the roller assembly and the surface of the pressure portion.

2. The peristaltic pump pressure regulating device according to claim 1, characterized in that: The pump body includes a bearing seat, a first part and a second part, wherein the first part and the second part are both detachably connected to the bearing seat; the first part and the second part jointly define a cavity and two through-tube holes connected to the cavity; the roller assembly is located in the cavity and matched with the bearing seat; the pressing part is hinged to the second part and is located in the cavity; the power output end of the adjustment assembly is against the side of the pressing part away from the roller assembly.

3. The peristaltic pump pressure regulating device according to claim 2, characterized in that: The cavity is a cylindrical cavity, and the pressing portion is an arc-shaped plate-shaped structure; the pressing tube gap is formed between the inner wall surface of the arc-shaped plate-shaped structure and the wheel surface of the roller assembly.

4. The peristaltic pump pressure regulating device according to claim 3, characterized in that: The side of the pressing portion that is away from the hinged connection with the second portion at least partially extends into the tube-penetrating hole, and the power output end of the regulating component abuts against the portion of the pressing portion that is placed in the tube-penetrating hole.

5. The peristaltic pump pressure regulating device according to claim 3, characterized in that: The second part is provided with an escape opening, and the power output end of the regulating assembly passes through the escape opening and abuts against the pressing part.

6. The peristaltic pump pressure regulating device according to claim 2, characterized in that: The second part is hinged to the bearing seat, and a locking structure which is locked with the first part is provided on a side of the second part which is away from the hinged side of the second part and the bearing part.

7. The peristaltic pump pressure regulating device according to claim 2, characterized in that: The second part is provided with a limiting protrusion, and the pressing part is provided with a limiting groove matched with the limiting protrusion. The cooperation between the limiting protrusion and the limiting groove is used to limit the minimum width of the pressing tube gap.

8. The peristaltic pump pressure regulating device according to any one of claims 1 to 7, characterized in that: The adjusting component is a cylinder.

9. The peristaltic pump pressure regulating device according to claim 8, characterized in that: The pressing portion has a contact surface, and the piston rod of the cylinder contacts the contact surface.

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