CN210509546U

CN210509546U - Eccentric liquid feeding mechanism and peristaltic pump with same

Info

Publication number: CN210509546U
Application number: CN201921437850.2U
Authority: CN
Inventors: 孙巍; 侯玉婷; 黄树明; 曹晓鹏
Original assignee: Baoding Shenchen Precision Pump Co ltd
Current assignee: Baoding Shenchen Precision Pump Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-12
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses an eccentric liquid feeding mechanism and have eccentric peristaltic pump who send liquid mechanism, including the extrusion wheel that is used for the extrusion hose, be used for holding the cavity of extrusion wheel for the driving motor of drive extrusion wheel gyration, the extrusion wheel pass through the pivot pin joint in the cavity, the appearance of extrusion wheel has the distal end portion apart from that pin joint point length distance is the biggest, distal end portion and cavity inner wall interval are the shortest when extrusion wheel gyration, the shape of cavity with distal end portion gyration institute through the route constitute and seal the curve form unanimously, lie in and leave the clearance between cavity and the extrusion wheel, form the extrusion gap that is used for the extrusion hose between cavity and the extrusion wheel, driving motor is connected through the slewing mechanism power that is used for driving the extrusion wheel gyration. The volume is small, the structure is compact, the single circulation transmission process has no pulsation, the abrasion of the hose is reduced, the condition of single liquid feeding fluid disorder is prevented, and the problem that the single transmission fluid is unstable is solved.

Description

Eccentric liquid feeding mechanism and peristaltic pump with same

Technical Field

The utility model relates to a peristaltic pump mechanism field, specially adapted eccentric liquid mechanism of sending and have eccentric peristaltic pump who sends liquid mechanism.

Background

The peristaltic pump is a special volumetric pump, is mainly applied to the distribution or conveying of fluid, and is widely applied to the industries of pharmacy, food, chemical industry and the like. When the pump head of the common peristaltic pump works, the roller rotates, the rollers on the roller are uniformly distributed, a section of pump pipe between the two rollers forms pillow-shaped fluid, and the fluid is pumped by alternately extruding and releasing the elastic conveying hose of the pump. Meanwhile, the peristaltic pump head uses at least 2 rollers to alternatively extrude the hose, so that the size of the pump head is limited by the size and the number of the rollers, and the size is larger; and in the process of single transmission, the hose is worn for at least 2 times, and then the more the number of rollers is, the more the hose is worn.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose, the utility model discloses to above-mentioned current peristaltic pump send liquid mechanism to produce the pulsation easily and consequently produce a single transmission non-pulsating eccentric liquid mechanism of sending and have the eccentric peristaltic pump who send liquid mechanism.

The utility model discloses the problem that will solve is realized by following technical scheme:

the utility model provides an eccentric liquid feeding mechanism, is including the extrusion wheel that is used for extrudeing the hose and the cavity that is used for holding the extrusion wheel, the extrusion wheel pass through pivot pin joint in the cavity, the appearance of extrusion wheel has the distal end portion that apart from pivot point length distance is the biggest, distal end portion and cavity inner wall interval are shortest when the extrusion wheel gyration, the shape of cavity with distal end portion gyration pass through the route and constitute and seal the curve form unanimously, lie in and leave the clearance between cavity and the extrusion wheel, form the extrusion gap that is used for extruding the hose between cavity and the extrusion wheel.

Furthermore, the extrusion wheel is a cam or an eccentric wheel.

Furthermore, a hoop which is matched with the outer ring of the extrusion wheel in shape is provided with a middle spacer sleeve, the outer ring of the middle spacer sleeve is provided with an annular roller in clearance fit, and the shape of the annular roller is consistent with the shape of the middle spacer sleeve.

Furthermore, the extrusion wheel, the middle spacing sleeve and the annular roller are all positioned in the concave cavity.

The peristaltic pump with the eccentric liquid feeding mechanism comprises the eccentric liquid feeding mechanism and a driving motor for driving the extrusion wheel to rotate, wherein the driving motor is in power connection with a rotating mechanism for driving the extrusion wheel to rotate.

Furthermore, the rotating mechanism comprises a worm wheel and a worm, the worm wheel is positioned on the extruding wheel and concentrically and fixedly connected with the extending part of the concave cavity, the worm is assembled on the driving motor, the worm is matched with the worm wheel, the worm wheel is positioned outside the concave cavity, and the worm rotates to drive the worm wheel to further drive the extruding wheel to rotate.

Furthermore, the rotating mechanism comprises a concentric gear which is positioned at the extending part of the extrusion wheel from the concave cavity and is concentrically and fixedly connected and a driving gear which is positioned on the driving motor, the driving gear is matched with the concentric gear, the concentric gear is positioned outside the concave cavity, and the driving gear rotates to drive the concentric gear to drive the extrusion wheel to rotate.

The utility model discloses for the beneficial effect that has now:

the device has the advantages of small volume, compact structure, no pulsation in a single cycle transmission process and reduced hose abrasion.

In the single transmission process, the hose is not alternately extruded by the rollers, so that the single transmission process has no pulsation, the grinding times of the hose are reduced, and the abrasion of the hose is effectively reduced.

The distribution of the fluid pressure values in a single extrusion cycle is constant, and the liquid pulsation caused by regional jumping change of the pressure values is prevented, so that the pulsation problem in the single extrusion cycle is solved.

Drawings

Fig. 1 is an exploded view of the structure of the present invention.

Fig. 2 is an internal assembly structure diagram of the present invention.

Fig. 3 is a structural view of the internal eccentric mechanism of the present invention.

Fig. 4 is a structural view of the extrusion gap of the present invention.

Fig. 5 is a mechanism configuration diagram in the cam state.

Description of reference numerals:

pivot 1, annular gyro wheel 2, middle spacer 3, worm wheel 4, rear housing 5, pipe strap 7, cavity 8, extrusion wheel 9, distal end 9a, preceding box 10, extrusion gap a

Detailed Description

The invention will be further explained with reference to fig. 1-5 below:

embodiment 1, referring to fig. 1 and 2, an eccentric fluid feeding mechanism, a squeezing wheel 9 for forming a squeezing hose and a cavity 8 for receiving the squeezing wheel, the extrusion wheel is a cam, the extrusion wheel is pivoted in the concave cavity through a pivot 1, the appearance of the extrusion wheel is provided with a far end part 9a with the maximum length away from the pivot point, the distance between the far end part and the inner wall of the concave cavity is shortest when the extrusion wheel rotates, the shape of the concave cavity and the path which the far end part rotates form a closed curve shape consistent, a gap is reserved between the concave cavity and the extrusion wheel, a middle spacer sleeve is sleeved on a hoop which is matched with the outer ring of the extrusion wheel in shape, the outer ring of the middle spacer sleeve is provided with an annular roller in clearance fit, the shape of the annular roller is consistent with the shape of the middle spacer sleeve, and an extrusion gap a for extruding the hose by the distal end part is formed between the concave cavity and the annular roller.

In order to ensure good driving performance, the shape of the annular roller is consistent with the shape of the middle spacer sleeve 3, and the extrusion wheel, the middle spacer sleeve and the annular roller are all positioned in the concave cavity.

Embodiment 2, referring to fig. 1 and 2, an eccentric fluid feeding mechanism for forming a squeezing wheel 9 for squeezing a hose and a cavity 8 for receiving the squeezing wheel, the squeezing wheel being an eccentric wheel, the squeezing wheel being pivotally connected in the cavity by a pivot, the squeezing wheel having an outer shape with a distal end portion having a maximum length from the pivot point, the distal end portion having a minimum distance from an inner wall of the cavity when the squeezing wheel rotates, the cavity having a shape conforming to a closed curve along a path through which the distal end portion rotates, a gap being provided between the cavity and the squeezing wheel, a middle spacer being provided on an outer ring of the squeezing wheel, a ring-shaped roller being provided on an outer ring of the middle spacer in a clearance-fitting manner, the ring-shaped roller having a shape conforming to an outer shape of the middle spacer, a squeezing gap for squeezing the hose by the distal end portion being formed between the cavity and the ring-shaped roller, the squeezing wheel, The intermediate spacer sleeve and the annular roller are both located within the cavity.

Embodiment 3, a peristaltic pump with an eccentric liquid feeding mechanism, comprising the eccentric liquid feeding mechanism as disclosed in embodiment 1 or embodiment 2,

the eccentric liquid feeding mechanism is arranged in the concave cavity, a hose penetrates into an extrusion gap, a driving motor used for driving the extrusion wheel to rotate is arranged on one side of the eccentric liquid feeding mechanism, a worm wheel is fixedly connected with the extrusion wheel concentrically from the extending part of the concave cavity, the worm wheel is arranged outside the concave cavity and is matched with a worm wheel 4 assembled on the driving motor, the eccentric liquid feeding mechanism further comprises a front box body 10 and a rear shell body 5, the concave cavity is arranged in the front box body, a worm wheel groove used for containing the worm wheel is formed in the rear shell body, the front box body and the rear shell body are combined to form a shell, a pipe clamp 7 is embedded into the shell and is provided with a water inlet joint and a water outlet joint, and two ends of the hose are respectively butted on the water inlet joint and the water outlet joint.

Embodiment 4, a peristaltic pump with an eccentric liquid feeding mechanism, comprising the eccentric liquid feeding mechanism as disclosed in embodiment 1 or embodiment 2,

the eccentric liquid feeding mechanism is arranged in the concave cavity, the hose penetrates into the extrusion gap, a driving motor used for driving the extrusion wheel to rotate is arranged on one side of the eccentric liquid feeding mechanism, the extrusion wheel provides rotating force by means of the rotating mechanism, a gear is fixedly connected with the extrusion wheel from the extending part of the concave cavity in a concentric mode and is arranged on the driving motor, the driving gear is matched with the concentric gear, the concentric gear is located outside the concave cavity, and the driving gear rotates to drive the concentric gear to drive the extrusion wheel to rotate.

Still include preceding box body 10 and back casing 5, the cavity offer in the front box body, back casing in open and to have the worm wheel groove that is used for holding the worm wheel, preceding box body and back casing are closed mutually and are formed the casing, it has pipe strap 7 to be located the embedding in the casing, the pipe strap has water supply connector and water connectors, the both ends of hose dock respectively on water supply connector and water connectors.

Embodiment 5, as described in embodiment 3, is different from the above-described embodiment in that the rotating mechanism for providing a rotational force to drive the endless roller and the intermediate spacer to rotate is a timing belt matching with a timing pulley, and the timing pulley finally drives the endless roller to rotate.

Embodiment 6, as described in embodiment 3, is distinguished in that the rotating mechanism is a reduction motor directly connected.

The principle of the present invention is further explained as follows:

the driving motor drives the extrusion wheel to rotate around the pivot, the extrusion wheel drives the middle spacer sleeve, the middle spacer sleeve drives the annular roller to do eccentric rotation movement, theoretical pressure pipe gaps are formed between the eccentric hole of the eccentric wheel and the far end portion (the farthest end) of the driven annular roller and the inner wall of the groove, so that the hose is completely extruded, the position of the pressure pipe gaps rotates along with the rotation of the extrusion wheel, negative pressure is formed in the hose, and the annular roller and the hose are in contact with each other to extrude the hose liquid to flow along with the pressure pipe gaps. In the single transmission process, the hose is not alternately extruded by the rollers, so that the single transmission process has no pulsation, the grinding times of the hose are reduced, the abrasion of the hose is effectively reduced, and the worm and gear are adopted as a driving mechanism, so that the hose has good self-locking performance, and the backflow can be prevented.

Claims

1. The eccentric liquid feeding mechanism is characterized by comprising an extrusion wheel for extruding a hose and a concave cavity for accommodating the extrusion wheel, wherein the extrusion wheel is pivoted in the concave cavity through a pivot, the appearance of the extrusion wheel is provided with a far end part with the largest length away from a pivot point, the distance between the far end part and the inner wall of the concave cavity is shortest when the extrusion wheel rotates, the shape of the concave cavity and a path through which the far end part rotates form a closed curve shape, a gap is reserved between the concave cavity and the extrusion wheel, and an extrusion gap for extruding the hose is formed between the concave cavity and the extrusion wheel.

2. The eccentric liquid feeding mechanism according to claim 1, wherein the extrusion wheel is a cam or the extrusion wheel is an eccentric wheel.

3. The eccentric liquid conveying mechanism as claimed in claim 2, wherein the outer ring of the extruding wheel has a ring with a matched shape and a middle spacer sleeve, and the outer ring of the middle spacer sleeve is provided with a ring roller in a clearance fit manner, wherein the shape of the ring roller is consistent with the shape of the middle spacer sleeve.

4. The eccentric liquid feeding mechanism as set forth in claim 3, wherein the pressing wheel, the intermediate spacer and the ring roller are disposed in the concave chamber.

5. A peristaltic pump with an eccentric fluid delivery mechanism, comprising the eccentric fluid delivery mechanism of claim 4, wherein: the extrusion device is characterized by further comprising a driving motor for driving the extrusion wheel to rotate, wherein the driving motor is in power connection with a rotating mechanism for driving the extrusion wheel to rotate.

6. The peristaltic pump with an eccentric liquid feeding mechanism according to claim 5, wherein: the rotating mechanism comprises a worm wheel and a worm, the worm wheel is positioned on the extrusion wheel and fixedly connected with the extension part of the concave cavity in a concentric mode, the worm is arranged on the driving motor in a matched mode, the worm is matched with the worm wheel, the worm wheel is positioned outside the concave cavity, and the worm rotates to drive the worm wheel to further drive the extrusion wheel to rotate.

7. The peristaltic pump with an eccentric liquid feeding mechanism according to claim 5, wherein: the rotating mechanism comprises a concentric gear which is positioned at the extending part of the extrusion wheel from the concave cavity and is fixedly connected with the extrusion wheel in a concentric manner and a driving gear which is arranged on the driving motor in a matching manner, the driving gear is matched with the concentric gear, the concentric gear is positioned outside the concave cavity, and the driving gear rotates to drive the concentric gear to drive the extrusion wheel to rotate.