CN112065714A

CN112065714A - Fluid quantifying device

Info

Publication number: CN112065714A
Application number: CN202010897971.6A
Authority: CN
Inventors: 李海涛
Original assignee: Shenzhen Second Intelligent Equipment Co Ltd
Current assignee: Shenzhen Second Intelligent Equipment Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-11

Abstract

The invention provides a fluid quantifying device which comprises a bottom plate, a driving shaft and an intermediate plate. The drive plate is located the cavity of intermediate lamella, and cavity and drive plate all are eccentric structure, and when the drive shaft rotated, the drive plate can follow the rotation. The periphery of drive plate is seted up a plurality of along its circumferential direction with the mounting groove of same central angle interval distribution, installs the measurement baffle through elastomeric element in the mounting groove. The top surface of the bottom plate is provided with a feeding area and a discharging area, and the two side walls of the bottom plate are respectively provided with a feeding port and a discharging port. When the drive plate of the device drives the metering partition plates to rotate in the cavity, the volume divided by the two adjacent metering partition plates changes, and the changed volume is a fixed value and is used as the volume of single input/output of fluid, so that the quantitative output of the fluid is realized. The device is used for high-precision metering of fluids with different viscosities, and the pump clamping phenomenon cannot occur. In addition, even if the device is worn, the device can automatically compensate, and the service life is long.

Description

Fluid quantifying device

Technical Field

The invention belongs to the technical field of fluid quantification, and particularly relates to a fluid quantification device.

Background

The prior fluid metering device mainly adopts a gear pump, and fluid is metered by the mutual meshing of two gears, and when the fluid is metered by adopting the mode, the fluctuation of the fluid is small, and the precision is high. However, the gear pump can only measure a few of fluid with medium viscosity without filler, the measuring precision is low for the fluid with low viscosity, the pump clamping phenomenon can occur for the fluid with filler, the wear is fast, once the fluid is worn, the whole gear pump needs to be replaced again, the service life of the product is short, and the use cost is high.

Disclosure of Invention

The invention aims to provide a fluid metering device, and aims to solve the problems that the precision is low when a low-viscosity fluid is metered by a fluid metering device in the prior art, a pump is blocked when a filler fluid is metered, and a product needs to be replaced after being worn.

The invention is realized in this way, a fluid quantitative device, comprising a bottom plate, a driving shaft and a middle plate; the middle plate is arranged on the top surface of the bottom plate, the middle plate is provided with a cavity, the cavity is of an eccentric structure, the driving plate is positioned in the cavity, and the driving plate is also of an eccentric structure; an annular gap is formed between the outer periphery of the driving plate and the inner wall of the middle plate; the driving shaft is in transmission connection with the driving plate, and when the driving shaft rotates, the driving plate can rotate along with the driving shaft;

the periphery of the driving plate is provided with a plurality of mounting grooves which are distributed at intervals along the circumferential direction of the driving plate at the same central angle, each mounting groove is internally provided with a metering partition plate through an elastic component, the elastic component is in a compressed state, and when the driving plate rotates, the metering partition plates always press against the inner wall of the middle plate; the top surface of the bottom plate is provided with a feeding area and a discharging area corresponding to the annular gap, two side walls of the bottom plate are respectively provided with a feeding port and a discharging port, the feeding port is communicated with the feeding area, and the discharging port is communicated with the discharging area.

Further, the shape of the cavity is an eccentric circle, and the shape of the outer contour of the driving plate is also an eccentric circle.

Furthermore, the feeding area and the discharging area are arc-shaped grooves.

Furthermore, the end face of the metering partition plate close to the inner wall of the middle plate is an arc-shaped curved surface.

Further, the elastic component is a compression spring.

Furthermore, two groove walls opposite to the mounting groove are of plane structures parallel to each other, the shape of the outer side surface of the metering partition plate is matched with that of the groove wall of the mounting groove, and when the metering partition plate moves, the mounting groove can limit and guide the metering partition plate.

Further, the fluid metering device further comprises a cover plate mounted on the top surface of the intermediate plate.

Compared with the prior art, the invention has the beneficial effects that:

according to the fluid quantifying device, the cavities of the driving plate and the middle plate are designed into eccentric structures, so that when the driving plate drives the metering partition plates to rotate in the cavities, the divided volumes of the two adjacent metering partition plates are changed, and the changed volumes are just equal to the volume of single input/output of fluid. Because the volume of the partial change is a fixed value, the whole device can realize the quantitative output of the fluid. Due to the structural characteristics of the device, the device can be suitable for high-precision metering of fluids with different viscosities (including low-viscosity fluids). Meanwhile, because no gear pump structure is arranged, the pump clamping phenomenon can not occur when the fluid with the filler is quantified.

In addition, even if the measuring partition plate and the inner wall of the intermediate plate of the device are abraded after long-term operation, the volume of partial change is a fixed value, and the quantitative output of the fluid is not influenced, so that the device can automatically compensate after abrasion, and the service life is long.

Drawings

Fig. 1 is a schematic perspective view of a fluid metering device according to an embodiment of the present invention;

FIG. 2 is a schematic exploded view of the fluid metering device of FIG. 1;

FIG. 3 is a schematic longitudinal cross-sectional view of the fluid dosing device of FIG. 1 in an exploded condition;

FIG. 4 is a perspective view of the fluid metering device of FIG. 1 prior to assembly of the drive shaft and cover plate;

FIG. 5 is a schematic top view of the structure shown in FIG. 4;

fig. 6 is a schematic view of the structure of the bottom plate of the fluid metering device shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, a fluid metering device according to a preferred embodiment of the present invention is shown, which includes a base plate 1, a driving plate 2, a driving shaft 3, an intermediate plate 4 and a cover plate 5.

An intermediate plate 4 is mounted on the top surface of the base plate 1, and a cover plate 5 is mounted on the top surface of the intermediate plate 4. Wherein the intermediate plate 4 has a cavity 41 and the drive plate 2 is located within the cavity 41. The driving shaft 3 is in transmission connection with the driving plate 2, and when the driving shaft 3 rotates, the driving plate 2 can rotate along with the driving shaft.

The cavity 41 and the drive plate 2 are eccentric. Referring to fig. 4, an annular gap 6 is formed between the outer periphery of the driving plate 2 and the inner wall of the intermediate plate 4. Specifically, the cavity 41 is in the shape of an eccentric circle, and the outer contour of the drive plate 2 is also in the shape of an eccentric circle.

The periphery of the driving plate 2 is provided with a plurality of mounting grooves 21 which are distributed at intervals along the circumferential direction at the same central angle. In the present embodiment, the number of the mounting grooves 21 is 6, and it is easy to understand that, in practical application, the number of the mounting grooves 21 is not limited as long as the central angles of any two adjacent mounting grooves 21 are the same.

Each mounting groove 21 is provided with a metering partition 8 therein by an elastic member, which in this embodiment is a compression spring 7. Besides, the elastic deformation function can be realized by adopting an elastic material or a gas driving mode.

The compression spring 7 is always in a compressed state, and the metering partition plate 8 always presses against the inner wall of the middle plate 4 in the rotating process of the driving plate 2.

Referring to fig. 5 and 6, a feeding area 11 and a discharging area 12 are disposed on the top surface of the bottom plate 1 corresponding to the annular gap 6, in this embodiment, the feeding area 11 and the discharging area 12 are arc-shaped grooves respectively disposed at two opposite ends of the bottom plate 1. The positions of the feeding area 11 and the discharging area 12 can be completely positioned in the annular gap 6, and the widths of the feeding area and the discharging area can also be larger than the section width of the annular gap 6.

Referring to fig. 1, a material inlet 13 and a material outlet 14 are respectively disposed on two side walls of the bottom plate 1, the material inlet 13 is communicated with the material receiving area 11, and the material outlet 14 is communicated with the material outlet area 12.

Two cell walls that the mounting groove 21 is relative are the planar structure that is parallel to each other, and when measurement baffle 8 moved, mounting groove 21 can give measurement baffle 8 spacing and direction. The shape of the outer side 81 of the measuring partition 8 (i.e. the end surface close to the inner wall of the middle plate 4) matches with the shape of the wall of the mounting groove 21, in this embodiment, the outer side 81 of the measuring partition 8 is an arc-shaped curved surface.

In the fluid metering device of the embodiment, the cavity 41 of the driving plate 2 and the middle plate 4 is designed to be an eccentric structure, so that when the driving plate 2 drives the metering partition plates 8 to rotate in the cavity 41, the volume divided by two adjacent metering partition plates 8 changes, and the changed volume is just equal to the volume of single input/output of fluid. Because the volume of the partial change is a fixed value, the whole device can realize the quantitative output of the fluid. Due to the structural characteristics of the device, the device can be suitable for high-precision metering of fluids with different viscosities (including low-viscosity fluids). Meanwhile, because no gear pump structure is arranged, the pump clamping phenomenon can not occur when the fluid with the filler is quantified.

In addition, even if the measuring partition plate 8 and the inner wall of the intermediate plate 4 of the device are worn after long-term operation, the volume of partial change is a fixed value, and the quantitative output of the fluid is not influenced, so that the device can automatically compensate after being worn, and has long service life.

The device of the present embodiment can be used for the metered delivery of fluids (mainly grease, glue, etc.), in particular for the metered delivery of fluids with fillers.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fluid dosing device is characterized by comprising a bottom plate, a driving shaft and an intermediate plate; the middle plate is arranged on the top surface of the bottom plate, the middle plate is provided with a cavity, the cavity is of an eccentric structure, the driving plate is positioned in the cavity, and the driving plate is also of an eccentric structure; an annular gap is formed between the outer periphery of the driving plate and the inner wall of the middle plate; the driving shaft is in transmission connection with the driving plate, and when the driving shaft rotates, the driving plate can rotate along with the driving shaft;

2. The fluid metering device of claim 1, wherein the cavity is in the shape of an eccentric circle and the drive plate outer profile is in the shape of an eccentric circle.

3. The fluid metering device of claim 2, wherein the infeed and outfeed sections are arcuate grooves.

4. The fluid metering device of claim 2, wherein the end surface of said metering diaphragm adjacent the inner wall of said intermediate plate is arcuately curved.

5. The fluid dosing device of any one of claims 1 to 4 wherein the resilient member is a compression spring.

6. The fluid metering device of any one of claims 1 to 4, wherein the two opposite walls of the mounting groove are parallel plane structures, the shape of the outer side surface of the metering partition matches with the shape of the wall of the mounting groove, and the mounting groove can limit and guide the metering partition when the metering partition moves.

7. The fluid dosing device of any one of claims 1 to 4 further comprising a cover plate mounted on the top surface of the intermediate plate.