CN-122014575-A - Peristaltic pump without pipe

CN122014575ACN 122014575 ACN122014575 ACN 122014575ACN-122014575-A

Abstract

The invention relates to a peristaltic pump without a tube. Comprises a platform type pump body, a peristaltic pumping unit, a driving unit and a replaceable upper mounting plate or a buffer assembly. The peristaltic pumping unit is arranged in the pump cavity and comprises an annular diaphragm, an extension part arranged above the annular diaphragm is in sealing fit with the platform pump body and is positioned between the fluid inlet and the fluid outlet, the driving unit is connected with the peristaltic pumping unit, a butt joint structure matched with the positioning connection part is arranged at the bottom of the replaceable upper mounting plate or the buffer assembly, the peristaltic pumping unit is detachably mounted at the top of the platform pump body, a channel communicated with the fluid inlet and the fluid outlet is arranged in the peristaltic pumping unit, and the buffer cavity is formed in the peristaltic pumping unit when the peristaltic pumping unit is a buffer assembly. The detachable connection of the pump body and the upper layer assembly is realized through the modularized design, and the flexibility and the maintenance convenience of the equipment are improved.

Inventors

SUN PENGFEI
LIU HAO

Assignees

卡川尔流体科技(上海)有限公司

Dates

Publication Date: 20260512
Application Date: 20260312

Claims (10)

1. A tubeless peristaltic pump comprising: the platform type pump body is provided with a positioning connection part at the top, a pump cavity is formed in the platform type pump body, and a fluid inlet and a fluid outlet are formed in the top of the pump cavity; The peristaltic pumping unit is arranged in the pump cavity and comprises an annular diaphragm, an annular fluid conveying cavity is formed by the outer side of the annular diaphragm and the inner wall of the pump cavity, an extension part is arranged above the annular diaphragm, and the extension part is in sealing fit with the platform type pump body and is positioned between the fluid inlet and the fluid outlet; The driving unit is connected with the peristaltic pumping unit; The bottom of the replaceable upper mounting plate or the buffer component is provided with a butt joint structure matched with the positioning connecting part and is detachably arranged at the top of the platform type pump body through the butt joint structure, and a channel communicated with the fluid inlet and the fluid outlet is arranged in the upper mounting plate or the buffer component; wherein, when the buffer component is used, a buffer cavity is formed inside the buffer component.
2. The tubeless peristaltic pump of claim 1 wherein the platform pump body has transition grooves on an inner wall thereof at the fluid inlet and fluid outlet, the transition grooves extending in an axial direction.
3. The tubeless peristaltic pump of claim 1 wherein the positioning connection and the docking structure are one or more of a combination of a mating positioning hole and a positioning post, a bayonet and a buckle, or a threaded hole and a screw.
4. The tubeless peristaltic pump of claim 1 wherein the buffer assembly has an inlet buffer chamber and an outlet buffer chamber formed therein that are independent of each other, the inlet buffer chamber being in communication with the fluid inlet and the outlet buffer chamber being in communication with the fluid outlet.
5. The tubeless peristaltic pump of claim 4 wherein the volumes of the inlet buffer chamber and the outlet buffer chamber are set unequal.
6. The tubeless peristaltic pump of claim 1 or 4 wherein the cushioning assembly extends in a height or length direction.
7. The tubeless peristaltic pump of claim 1 wherein the peristaltic pumping unit further includes an extrusion disposed inside the annular diaphragm and periodically extruding the annular diaphragm under the drive of the drive unit.
8. The tubeless peristaltic pump of claim 1 wherein the extension is embedded with a reinforcing insert, the reinforcing insert is provided with a positioning protrusion, the platform pump body is provided with a positioning groove matched with the positioning protrusion, or an integrally formed gasket is arranged above the extension, and the platform pump body is provided with a sealing piece installation part matched with the gasket.
9. The tubeless peristaltic pump of claim 1 wherein the drive unit includes a motor and an eccentric, the output shaft of the motor being connected to the eccentric, the eccentric being connected to the peristaltic pumping unit by a bearing; Or, the output shaft of the motor is connected with a synchronous disc, at least one roller assembly is arranged on the synchronous disc, and the roller assembly is in contact fit with the peristaltic pumping unit.
10. The tubeless peristaltic pump of claim 9 wherein the platform pump body is fixedly coupled to the motor by a mounting plate.

Description

Peristaltic pump without pipe Technical Field The invention relates to the technical field of fluid conveying equipment, in particular to a tubeless peristaltic pump. Background The existing tubeless peristaltic pump technology has the defects that firstly, the interface adaptation is poor, the interfaces of the existing tubeless peristaltic pump are designed integrally with a pump body, when the interfaces of pipelines with different specifications or different positions are required to be adapted, the pump body is required to be replaced integrally, the operation is complex, the cost is high, the universality and the economy of equipment are seriously affected, secondly, the pulsation control difficulty is high, in order to reduce the conveying pulsation, the parts of the tubeless peristaltic pump are required to be additionally provided with independent buffer structures outside the pump body, the extra space is occupied, the number of parts is increased, the use cost and the maintenance cost of a user are obviously improved, finally, the vibration problem is outstanding, the membrane is vulnerable, when the effective buffer mechanism is lacking, the fluid pulsation can impact on the pump body part, large vibration and obvious axial movement are easy to generate, the use experience is affected, meanwhile, under the high-pressure working condition, the membrane is easily extruded to the position of the fluid inlet and outlet to be damaged, and the service life and the reliability of the equipment are seriously affected. Disclosure of Invention The invention aims to solve the problems of poor adaptability, difficult integration of a buffer structure, large vibration and contradiction of structural cost of the conventional tubeless peristaltic pump interface, and provides a platform pump body tubeless peristaltic pump, which can realize rapid adjustment of the interface by replacing an upper mounting plate, can integrally add a buffer cavity to reduce pulsation without occupying extra space, does not change a core structure, reduces vibration, reduces cost and prolongs service life. In order to achieve the above purpose, the invention adopts the following technical scheme: According to one aspect of the invention, there is provided a tubeless peristaltic pump comprising a platform pump body having a positioning connection portion at the top thereof and a pumping chamber formed therein, a peristaltic pumping unit disposed in the pumping chamber and having a fluid inlet and a fluid outlet at the top thereof, the peristaltic pumping unit comprising an annular diaphragm having an outer side thereof forming an annular fluid delivery chamber with an inner wall of the pumping chamber, an extension portion disposed above the annular diaphragm and sealingly engaged with the platform pump body and located between the fluid inlet and the fluid outlet, a driving unit connected to the peristaltic pumping unit, a replaceable upper mounting plate or buffer assembly having a docking structure at the bottom thereof for mating with the positioning connection portion and detachably mounted at the top thereof, the upper mounting plate or buffer assembly having a channel therein for communicating with the fluid inlet and the fluid outlet, wherein, in the case of the buffer assembly, a buffer chamber is formed therein. Optionally, transition grooves are arranged on the inner wall of the platform type pump body and positioned at the fluid inlet and the fluid outlet, and the transition grooves extend along the axial direction. Optionally, the positioning connection part and the abutting structure are one or more of a positioning hole and a positioning column, a clamping groove and a buckle or a threaded hole and a screw which are matched with each other. Alternatively, in the case of a buffer assembly, an inlet buffer chamber and an outlet buffer chamber are formed therein independently of each other, the inlet buffer chamber being in communication with the fluid inlet, the outlet buffer chamber being in communication with the fluid outlet. Alternatively, the volumes of the inlet buffer chamber and the outlet buffer chamber are set to be unequal. Alternatively, the buffer assembly may be extended in a height direction or a length direction. Optionally, the peristaltic pumping unit further comprises an extrusion part, wherein the extrusion part is arranged on the inner side of the annular membrane and periodically extrudes the annular membrane under the drive of the driving unit. Optionally, the extension part is embedded with a reinforcing insert, the reinforcing insert is provided with a positioning protrusion, the platform type pump body is provided with a positioning groove matched with the positioning protrusion, or an integrally formed gasket is arranged above the extension part, and the platform type pump body is provided with a sealing piece installation part matched with the gasket. Alternatively, the driving unit comprise