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Peristaltic pump head

A peristaltic pump and pump cavity technology, applied in the field of peristaltic pumps, can solve problems such as dripping, poor pressure relief effect, and inability to transport liquids

Active Publication Date: 2019-05-24
重庆金山医疗技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned peristaltic pump can adjust the position of the positioning slider relative to the hose through the displacement adjustment mechanism, which can solve the problem of liquid dripping from the hose after the peristaltic pump stops, it still has the following problems: because the positioning slider is located on the hose and the contact surface between the positioning slider and the hose is a smooth surface. There is no limit structure for the hose. When the adjustment mechanism makes the positioning slider separate from the hose as a whole, the hose is prone to radial movement and offset The position in the working state makes it impossible to effectively transport the liquid during the next work; there is only one pressure relief method, and when this pressure relief method fails, the hose will also have the problem of liquid dripping, and the pressure relief effect is not good. good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 with figure 2 The peristaltic pump head shown includes a pump body 1 with a pump cavity inside and a main shaft 2 passing through the pump cavity along the front and rear directions of the pump body 1, as shown in image 3 with Figure 4 As shown, there are three rollers 3 evenly distributed in the circumferential direction on the main shaft 2, and a clamp hole is provided on the left and right sides of the pump chamber, and the hose 4 penetrates into the pump chamber through one of the clamp holes and then passes through the other clamp hole. out, such as Figure 4 As shown, the top of the pump chamber has a cylindrical surface 11 coaxially arranged with the main shaft 2, and the hose 4 is attached to the cylindrical surface 11 under the action of the roller 3, as Figure 5 , Image 6 , Figure 7 with Figure 8 As shown, there is a concave hole 12 extending radially along the main shaft 2 on the cylindrical surface 11 , a first pressure relief s...

Embodiment 2

[0061] The structural principle of this embodiment is basically the same as that of Embodiment 1, the difference is that the concave hole 12 is located directly above the main shaft 2, and a through hole communicating with the outside of the pump body 1 is provided on the top of the concave hole 12. The driving unit is a cylinder with a piston rod fixed on the upper part of the pump body 1. The piston rod of the cylinder passes through the through hole and is fixedly connected with the slide seat 5. When the piston rod of the cylinder shrinks, it drives the slide seat 5 to move upward, so that the hose 4. Pressure relief. In this case, when the piston rod of the cylinder is stretched to the longest, the end surface of the slide seat 5 near the end of the main shaft 2 is higher than the cylindrical surface 11. After the pressure relief is completed, in order to reset the sliding seat 5 in time, a spring against the sliding seat 5 is provided on the top of the concave hole 12 . ...

Embodiment 3

[0063] The structural principle of this embodiment is basically the same as that of Embodiment 1, the difference is that the roller 3 is in the shape of a truncated cone and its central axis is parallel to the central axis of the main shaft 2, and the diameter of the roller 3 gradually decreases from front to rear. When the main shaft 2 is in the working state, the largest diameter of the roller 3 is squeezed on the hose 4 . Since the diameter of the roller 3 decreases gradually from front to back, the diameter of its front end is the largest, and the front end of the roller 3 is squeezed on the hose 4 when the main shaft 2 is in working condition. When the pressure needs to be relieved, the driving roller 3 moves from the back to the front.

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Abstract

The invention provides a peristaltic pump head, belongs to the technical field of peristaltic pumps, and solves the problems that an existing peristaltic pump is bad in hose locating effect and poor in pressure relief effect. The peristaltic pump head comprises a pump body and a main shaft; the pump body is internally provided with a pump cavity; the main shaft is arranged in the pump cavity in apenetrating manner along the front-and-back direction of the pump body; a plurality of rollers annularly distributed uniformly are arranged on the main shaft; clamping holes are separately formed in the left side and the right side of the pump cavity; a hose penetrates into the pump cavity via one clamping hole and then extends out of the another clamping hole in a penetrating manner; a cylindrical surface coaxial to the main shaft is arranged at the top of the pump cavity; the hose is stuck on the cylindrical surface under the action of the rollers; a concave hole extending in the radial direction of the main shaft is formed in the cylindrical surface; a first pressure relief structure is arranged in the concave hole; and a second pressure relief structure is arranged below the hose. Theperistaltic pump head has the advantages of good pressure relief effect and good locating effect on the hose.

Description

technical field [0001] The invention belongs to the technical field of peristaltic pumps and relates to a peristaltic pump head. Background technique [0002] Peristaltic pump is a new type of fluid delivery pump after rotor pump, centrifugal pump, diaphragm pump, etc. It is being widely promoted and applied in various industries such as medical treatment, medicine, food, beverage, chemical industry, and smelting. Existing peristaltic pumps cannot immediately stop the flow of liquid when the motor stops, but will cause the problem of liquid dripping, which will bring great discomfort to doctors when used, especially when used in medical operations, and waste operations. time. [0003] For this reason, the Chinese patent discloses a multi-purpose combined peristaltic pump [the authorized announcement number is CN207634276U], which includes a lower support base, a motor, a roller, a wheel frame, a hose, a positioning slider and a displacement adjustment mechanism; The front ...

Claims

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Application Information

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IPC IPC(8): F04B43/12F04B53/04
Inventor 彭章杰童万里徐松张志良肖建明
Owner 重庆金山医疗技术研究院有限公司
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