CN116181601A

CN116181601A - Constant flow pump

Info

Publication number: CN116181601A
Application number: CN202310109794.4A
Authority: CN
Inventors: 郗真超; 覃宏荣; 赵多顺
Original assignee: Guangzhou Ascend Precision Machinery Co ltd
Current assignee: Guangzhou Ascend Precision Machinery Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-05-30

Abstract

The invention discloses a constant flow pump, which comprises a pump body, wherein a cam, a rotating shaft and a plurality of pistons are arranged in the pump body, the cam is coaxially arranged with the rotating shaft, the near end of the cam is connected with the rotating shaft, the end face of the far end of the cam comprises an inclined plane, the pistons are axially arranged along the rotating shaft, a plurality of liquid storage cavities matched with the pistons are arranged in the pump body, the near end of the pistons is in transmission connection with the cam through the inclined plane, the far end of the pistons stretches into the liquid storage cavities, an elastic part for providing restoring force of the pistons is arranged in the pump body, the pistons are symmetrically arranged along the circumferential direction of the cam, the rotating shaft axially rotates along the rotating shaft, the pistons are pushed to mutually compensate and reciprocate in the liquid storage cavities through the inclined plane, a liquid inlet communicated with the liquid storage cavities and a converging outlet communicated with the liquid storage cavities are arranged on the pump body, and the pump body can achieve the effect of constant flow and metering.

Description

Constant flow pump

Technical Field

The invention is used in the technical field of precise metering of fluid, and particularly relates to a constant flow pump.

Background

At present, in the production process of products such as batteries, cosmetics, foods, electronic products, biological reagents and the like, the production processes such as split charging and filling of fluid need to use a precise metering liquid injection pump to meter the fluid, but the current metering liquid injection pump is adopted, and pulsation phenomenon can be generated during filling, so that multiple times of liquid outlet is needed to meter during filling, the liquid injection efficiency is relatively low, and liquid splashing can be caused when the filling speed is too high.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art and provides a constant flow pump which can ensure stable outflow of liquid.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a constant flow pump, includes the pump body, be equipped with cam, pivot and a plurality of piston in the pump body, the cam with the coaxial setting of pivot, the proximal end of cam with the pivot links to each other, the terminal surface at cam distal end includes the inclined plane, the piston is followed the axial setting of pivot, be equipped with in the pump body with a plurality of piston matched with a plurality of stock solution chamber, the proximal end of piston passes through the inclined plane with cam transmission is connected, the distal end stretches into in the stock solution chamber, be equipped with in the pump body and be used for providing the elastic component of piston restoring force, a plurality of the piston is followed the circumferential symmetry setting of cam, the pivot is followed its axial rotation, through the inclined plane promotes a plurality of pistons mutually offset be in the reciprocating motion in the stock solution chamber, be equipped with on the pump body with a plurality of the feed inlet that the stock solution chamber is linked together and with a plurality of the conflux export that the stock solution chamber is linked together.

Preferably, a universal ball bearing is arranged between the piston and the cam, the universal ball bearing comprises a bearing sleeve and a universal ball arranged in the bearing sleeve, the bearing sleeve is connected with the piston, and the universal ball is in rolling connection with the cam through the inclined plane.

Preferably, a pushing component is arranged between the piston and the bearing sleeve, the proximal end of the pushing component is connected with the bearing sleeve, and the distal end of the pushing component is sleeved on the periphery of the piston.

Preferably, a sleeve is arranged in the pump body, the piston comprises a piston shaft arranged at the proximal end and a piston rod arranged at the distal end, the sleeve is positioned at the periphery of the piston shaft, the elastic component is arranged in the sleeve and connected with the piston shaft, the distal end of the pushing component is inserted into the sleeve, and a first guiding component is arranged between the sleeve and the pushing component.

Preferably, the elastic component comprises a spring sleeved on the proximal end of the piston shaft, the spring is installed in the sleeve, and the spring is located between the piston shaft and the pushing component.

Preferably, a second guiding component is arranged in the sleeve along the axial direction of the rotating shaft, the second guiding component is positioned at the periphery of the piston shaft, and the second guiding component is positioned at the far end of the piston shaft.

Preferably, the pump body comprises a confluence block, the liquid storage cavity is arranged in the confluence block, a confluence channel which is used for communicating the confluence outlet with a plurality of liquid storage cavities is arranged in the confluence block, a liquid outlet one-way valve is arranged in the confluence channel, a sealing ring is arranged between the piston rod and the confluence block, and the piston rod is made of ceramic materials.

Preferably, a connecting part is arranged between the confluence block and the sleeve, the connecting part is positioned at the periphery of the piston rod, a third guiding part is arranged in the connecting part, the third guiding part is positioned at the periphery of the piston, the sealing ring is arranged between the confluence block and the third guiding part, and the third guiding part is annular.

Preferably, a liquid inlet channel which is used for communicating the liquid inlet with the liquid storage cavity is arranged in the confluence block, and a liquid inlet one-way valve is arranged in the liquid inlet channel.

Preferably, a motor for driving the rotating shaft to rotate along the axial direction of the rotating shaft is arranged on the pump body, and a thrust bearing is arranged between the motor and the proximal end of the cam.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the constant flow pump is characterized in that a plurality of pistons are arranged, the pistons move in the liquid storage cavities independently, liquid inlet and liquid outlet are not interfered with each other, liquid is conveyed through liquid suction, liquid discharge and reciprocating motion of the pistons, the pistons are installed in parallel, and through inclined planes, when the rotating shafts rotate at the same angle, the pistons are mutually compensated, the quantity of pumped liquid is guaranteed to be consistent, the constant flow liquid outlet effect is achieved, and accordingly, fluid non-pulsation filling and metering are achieved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of one embodiment of the present invention;

FIG. 2 is a front view of one embodiment of the present invention;

FIG. 3 is a cross-sectional view at A-A in FIG. 2;

fig. 4 is a cross-sectional view at B-B in fig. 2.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

In the present invention, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present invention, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present invention, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present invention, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the invention can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Wherein fig. 1, fig. 2 and fig. 3 show reference direction coordinate systems of embodiments of the present invention, and the embodiments of the present invention are described below with reference to the directions shown in fig. 1, fig. 2 and fig. 3.

The embodiment of the invention provides a constant flow pump, referring to fig. 2, comprising a pump body, referring to fig. 3, a cam 100, a rotating shaft 200 and a plurality of pistons 300 are arranged in the pump body, the cam 100 and the rotating shaft 200 are coaxially arranged, the proximal end of the cam 100 is connected with the rotating shaft 200, the end face of the distal end of the cam 100 comprises an inclined plane 110, the pistons 300 are axially arranged along the rotating shaft 200, a plurality of liquid storage cavities 410 matched with the pistons 300 are arranged in the pump body, the proximal end of the pistons 300 is in transmission connection with the cam 100 through the inclined plane 110, the distal ends extend into the liquid storage cavities 410, an elastic component 330 for providing restoring force of the pistons 300 is arranged in the pump body, the pistons 300 are symmetrically arranged along the circumferential direction of the cam 100, the rotating shaft 200 axially rotates along the axial direction, the pistons 300 are pushed by the inclined plane 110 to mutually compensate and reciprocate in the liquid storage cavities 410, the pump body is provided with a liquid inlet 450 communicated with the liquid storage cavities 410 and a confluence outlet 420 communicated with the liquid storage cavities 410, the constant flow pump is provided with the pistons 300, the movement of the pistons 300 in the liquid storage cavities 410 is independently carried out, liquid inlet and liquid outlet are not interfered with each other, liquid is conveyed by liquid suction, liquid discharge and reciprocating movement of the pistons 300, the pistons 300 are installed in parallel, and the pistons 300 are mutually compensated through the inclined planes 100, so that when the rotating shaft 200 rotates at the same angle, the quantity of pumped liquid is ensured to be consistent, the constant flow liquid outlet effect is achieved, the non-pulsation filling and metering of fluid are realized, the constant flow pump can be completed at one time during filling, no pulsation phenomenon is avoided, the accuracy of liquid flow control is ensured, and the production efficiency is high.

In some embodiments, the pistons 300 are provided with two, it is understood that the liquid storage cavities 410 are provided with 2, and the movements of the 2 pistons 300 in the 2 liquid storage cavities 410 are all independently performed and do not interfere with each other; in some embodiments, the number of pistons 300 is 3, the number of 3 pistons 300 is arranged symmetrically around the circumference of the rotating shaft 200, the number of liquid storage cavities 410 is 3, the movements of the 3 pistons 300 in the 3 liquid storage cavities 410 are all independent and do not interfere with each other, it is understood that the inclined plane 110 needs to be precisely designed to ensure that the liquid output amounts of the plurality of pistons 300 are consistent, and the constant-flow liquid output effect is achieved.

As a preferred embodiment of the present invention, referring to fig. 3, a ball bearing 600 is disposed between the piston 300 and the cam 100, the ball bearing 600 includes a bearing housing 610 and a ball 620 disposed in the bearing housing 610, the bearing housing 610 is connected to the piston 300, and the ball 620 is in rolling connection with the cam 100 through a slope 110, so as to ensure that the liquid pumped by the piston 300 is more accurate.

Referring to fig. 3, a pushing member 700 is disposed between the piston 300 and the bearing housing 610, a proximal end of the pushing member 700 is connected to the bearing housing 610, and a distal end is sleeved on the outer circumference of the piston 300.

Referring to fig. 3, a sleeve 500 is provided in the pump body, the piston 300 includes a piston shaft 310 provided at a proximal end and a piston rod 320 provided at a distal end, the sleeve 500 is located at an outer circumference of the piston shaft 310, an elastic member 330 is installed in the sleeve 500 and connected to the piston shaft 310, a first guide member 710 is provided between the sleeve 500 and the ejector member 700, in which the distal end of the ejector member 700 is inserted into the sleeve 500, and the first guide member 710 is a guide bushing, ensuring the reciprocating movement of the piston 300 in the axial direction of the rotary shaft 200.

As a preferred embodiment of the invention, and referring to fig. 3, the resilient member 330 comprises a spring that is sleeved on the proximal end of the piston shaft 310, the spring being mounted within the sleeve 500, the spring being located between the piston shaft 310 and the pusher member 700.

Referring to fig. 3, a second guide member 510 is provided in the sleeve 500 along the axial direction of the rotation shaft 200, the second guide member 510 is located at the outer circumference of the piston shaft 310, the second guide member 510 is located at the distal end of the piston shaft 310, and the second guide member 510 is a guide bushing to ensure the reciprocating movement of the piston 300 along the axial direction of the rotation shaft 200.

Preferably, referring to fig. 3, the pump body includes a confluence block 400, a liquid storage cavity 410 is provided in the confluence block 400, a confluence channel 430 for communicating the confluence outlet 420 with the plurality of liquid storage cavities 410 is provided in the confluence block 400, referring to fig. 4, a liquid outlet check valve 431 is provided in the confluence channel 430, referring to fig. 3, a sealing ring 440 is provided between the piston rod 320 and the confluence block 400, movement between the piston rod 320 and the liquid storage cavity 410 is ensured to be performed in a sealing state, operation precision of the constant flow pump is ensured, and the piston rod 320 is made of a ceramic material.

In some embodiments, referring to fig. 3, a connection member 800 is provided between the manifold block 400 and the sleeve 500, the connection member 800 is located at the outer circumference of the piston rod 320, a third guide member 810 is provided in the connection member 800, the third guide member 810 is located at the outer circumference of the piston 300, a sealing ring 440 is provided between the manifold block 400 and the third guide member 810, and the third guide member 810 is in a ring shape.

Referring to fig. 4, a liquid inlet channel 460 communicating the liquid inlet 450 with the liquid storage cavity 410 is provided in the confluence block 400, and a liquid inlet check valve 461 is provided in the liquid inlet channel 460, so as to ensure the accuracy of the constant flow pump.

Referring to fig. 1, a motor 900 for driving the rotating shaft 200 to rotate along the axial direction is arranged on the pump body, and as a preferred embodiment of the invention, referring to fig. 3, a thrust bearing 910 is arranged between the motor 900 and the proximal end of the cam 100, so that the influence of vibration of the motor 900 on the cam 100 in the working process is avoided, the precision of the constant flow pump is ensured, the flow of the constant flow pump can be intelligently regulated by the motor in a numerical control manner, and the precision of flow control is ensured.

In the description of the present specification, reference to the terms "example," "embodiment," or "some embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention is, of course, not limited to the above-described embodiments, and one skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and these equivalent modifications or substitutions are intended to be included in the scope of the present invention as defined in the claims.

Claims

1. A constant flow pump, characterized in that: including the pump body, be equipped with cam, pivot and a plurality of piston in the pump body, the cam with the coaxial setting of pivot, the proximal end of cam with the pivot links to each other, the terminal surface at cam distal end includes the inclined plane, the piston is followed the axial setting of pivot, be equipped with in the pump body with a plurality of piston matched with a plurality of stock solution chamber, the proximal end of piston passes through the inclined plane with cam drive connects, the distal end stretches into in the stock solution chamber, be equipped with in the pump body and be used for providing the elastic component of piston restoring force, a plurality of pistons are followed the circumferential symmetry setting of cam, the pivot is followed its axial rotation, through the inclined plane promotes a plurality of pistons mutually compensating be in stock solution intracavity reciprocating motion, be equipped with on the pump body with a plurality of stock solution chamber are linked together inlet and with a plurality of the conflux export that the stock solution chamber is linked together.

2. The constant flow pump of claim 1, wherein: the universal ball bearing is arranged between the piston and the cam and comprises a bearing sleeve and a universal ball arranged in the bearing sleeve, the bearing sleeve is connected with the piston, and the universal ball is in rolling connection with the cam through the inclined plane.

3. The constant flow pump of claim 2, wherein: a pushing component is arranged between the piston and the bearing sleeve, the proximal end of the pushing component is connected with the bearing sleeve, and the distal end of the pushing component is sleeved on the periphery of the piston.

4. A constant flow pump according to claim 3, wherein: the pump body is internally provided with a sleeve, the piston comprises a piston shaft arranged at the proximal end and a piston rod arranged at the distal end, the sleeve is positioned at the periphery of the piston shaft, the elastic component is arranged in the sleeve and connected with the piston shaft, the distal end of the pushing component is inserted into the sleeve, and a first guiding component is arranged between the sleeve and the pushing component.

5. The constant flow pump of claim 4, wherein: the elastic component includes the cover and establishes the spring in the piston shaft proximal end, the spring is installed in the sleeve, the spring is located the piston shaft with the pushing component between.

6. The constant flow pump of claim 4, wherein: the sleeve is internally provided with a second guide part along the axial direction of the rotating shaft, the second guide part is positioned at the periphery of the piston shaft, and the second guide part is positioned at the far end of the piston shaft.

7. The constant flow pump of claim 4, wherein: the pump body comprises a confluence block, the liquid storage cavity is arranged in the confluence block, a confluence channel which is used for enabling the confluence outlet to be communicated with the liquid storage cavities is arranged in the confluence block, a liquid outlet one-way valve is arranged in the confluence channel, a sealing ring is arranged between the piston rod and the confluence block, and the piston rod is made of ceramic materials.

8. The constant flow pump of claim 7, wherein: the connecting component is arranged between the confluence block and the sleeve, the connecting component is located at the periphery of the piston rod, a third guiding component is arranged in the connecting component and located at the periphery of the piston, the sealing ring is arranged between the confluence block and the third guiding component, and the third guiding component is annular.

9. The constant flow pump of claim 7, wherein: the liquid storage device is characterized in that a liquid inlet channel which is used for communicating the liquid inlet with the liquid storage cavity is arranged in the confluence block, and a liquid inlet one-way valve is arranged in the liquid inlet channel.

10. The constant flow pump of claim 1, wherein: the pump body is provided with a motor for driving the rotating shaft to rotate along the axial direction of the rotating shaft, and a thrust bearing is arranged between the motor and the proximal end of the cam.