阅读说明：本技术 一种直线多通道切换的活塞泵 (Piston pump that straight line multichannel switches ) 是由 罗炜程 林春生 陈克彦 戴相辉 于 2020-09-02 设计创作，主要内容包括：本发明公开一种直线多通道切换的活塞泵,包括阀体基座、活塞组件和螺旋阀芯,阀体基座内部分别开设供活塞组件密封配合的活塞腔和供螺旋阀芯密封配合的切换阀腔,活塞腔和切换阀腔之间设有连通的公共孔,螺旋阀芯在对应公共孔的位置设有环形凹槽,并在环形凹槽中开设0号孔,0号孔通过环形凹槽始终与公共孔相通,螺旋阀芯内设中心腔,螺旋阀芯的外侧壁沿轴向等距、等角度且呈螺旋状开设若干个阀孔,0号孔通过中心腔始终与阀孔连通,阀体基座的外壁沿轴向竖直开设与阀孔等数量的切换孔,当螺旋阀芯不同角度转动时,不同角度有且只有一个阀孔与其中一个切换孔相通。本案具有直线式多通道切换的特点,无需购买注射器,结构简单,成本很低。(The invention discloses a linear multi-channel switching piston pump, which comprises a valve body base, a piston assembly and a spiral valve core, wherein a piston cavity for the piston assembly to be in sealing fit and a switching valve cavity for the spiral valve core to be in sealing fit are respectively arranged in the valve body base, a communicated common hole is arranged between the piston cavity and the switching valve cavity, an annular groove is arranged at the position of the spiral valve core corresponding to the common hole, and a No. 0 hole is arranged in the annular groove, the No. 0 hole is always communicated with the common hole through the annular groove, a central cavity is arranged in the spiral valve core, the outer side wall of the spiral valve core is provided with a plurality of valve holes which are equidistant and equiangular along the axial direction and are spirally formed, the No. 0 hole is always communicated with the valve holes through the central cavity, the outer wall of the valve body base is vertically provided with switching holes which are as many as the valve holes along the axial direction, when the spiral valve core rotates at different angles, only one valve hole is communicated with one switching hole at different angles. The scheme has the characteristic of linear multi-channel switching, does not need to purchase an injector, and is simple in structure and low in cost.)

1. A piston pump that straight line multichannel switches characterized in that: the spiral valve core is internally provided with a central cavity, the outer side wall of the spiral valve core is axially equidistant, equiangularly and spirally provided with a plurality of valve holes, the number 0 hole is always communicated with the valve holes through the central cavity, the outer wall of the valve body base is axially vertically provided with switching holes with the same number as the valve holes, when the spiral valve core rotates at different angles, the different angles are provided with only one valve hole communicated with one of the switching holes.

2. A linear multi-channel switching piston pump as in claim 1, further comprising: the valve body base may be made of stainless steel, PEEK or PVC material.

3. A linear multi-channel switching piston pump as in claim 1, further comprising: the included angle of two adjacent valve holes is 5-30 degrees.

4. A linear multi-channel switching piston pump as in claim 1, further comprising: the number of the valve holes and the number of the switching holes are eight.

5. A linear multi-channel switching piston pump as in claim 1, further comprising: the top of the spiral valve core is connected with a rotating motor to realize automatic rotation.

6. A linear multi-channel switching piston pump as in claim 1, further comprising: the piston assembly comprises a telescopic motor, a piston and a sealing ring, a motor rod of the telescopic motor extends into the piston cavity and is connected with the end of the piston to be in sealing fit with the inner wall of the piston cavity, and a groove is formed in the outer side wall of the piston and used for sleeving the sealing ring.

Technical Field

The invention relates to the technical field of piston pumps, in particular to a linear multi-channel switching piston pump.

Background

The existing pump valve module is generally a rotary valve module matched with an injection pump module, and the existing injection pump module is formed by assembling an injection pump mechanical structure and an injector, so that the structure is complex, and the cost is higher. For example, the prior art document with the application number of 202010395244X discloses a multifunctional sample extraction flow path, which includes a rotary valve and a syringe, wherein the syringe performs a liquid sucking or pushing action according to the rotation of the rotary valve at different angles, but the rotary valve and the syringe still have a split structure, which takes a lot of time for assembly and is inconvenient to use, as compared with the prior pump valve module. Further, the prior art document No. CN110354338A discloses a pump-valve integrated device with rotary distribution and injection functions, in which the rotary distribution valve and the injection pump are integrally designed, but the rotary distribution valve and the rotary valve are both circular in structure, and therefore, the device cannot be used under specific conditions, such as a linear space, a short pipe requirement, a hard pipe requirement, and the like. Therefore, a pump valve structure capable of meeting the requirement of a straight line space is urgently needed by the technical field.

Disclosure of Invention

The invention aims to provide a linear multi-channel switching piston pump, which overcomes the defects, has the characteristic of linear multi-channel switching, does not need to purchase an injector, can integrally suck and push liquid, and has simple structure and low cost.

In order to achieve the above purpose, the solution of the invention is: a piston pump with linear multi-channel switching comprises a valve body base, a piston assembly and a spiral valve core, wherein a piston cavity and a switching valve cavity are respectively formed in the valve body base, the piston assembly is in sealing fit with the piston cavity to perform piston motion, the spiral valve core is in sealing fit with the switching valve cavity to perform rotary motion, a communicated common hole is formed between the piston cavity and the switching valve cavity, an annular groove is formed in the position, corresponding to the common hole, of the spiral valve core, a No. 0 hole is formed in the annular groove, the No. 0 hole is always communicated with the common hole through the annular groove, a central cavity is formed in the spiral valve core, a plurality of valve holes are formed in the outer side wall of the spiral valve core in a spiral mode at equal intervals and at equal angles along the axial direction, the No. 0 hole is always communicated with the valve holes through the central cavity, and the switching holes with the valve holes in, when the spiral valve core rotates at different angles, only one valve hole is communicated with one switching hole at different angles.

Further, the valve body base may be made of stainless steel, PEEK, or PVC material.

Furthermore, the included angle of two adjacent valve holes is 5-30 degrees.

Further, the number of the valve holes and the number of the switching holes are eight.

Furthermore, the top of the spiral valve core is connected with a rotating motor to realize automatic rotation.

Further, the piston assembly comprises a telescopic motor, a piston and a sealing ring, a motor rod of the telescopic motor extends into the piston cavity, the tail end of the motor rod is connected with the piston and is in sealing fit with the inner wall of the piston cavity, and a groove is formed in the outer side wall of the piston and is used for sleeving the sealing ring.

After the scheme is adopted, the gain effect of the invention is as follows: the rotary distribution valve and the injection pump are integrated into a whole, and the compact and stable double-cavity structural design reduces the whole space of the pump valve and enables the injection pump and the rotary distribution valve to be arranged in the base, so that the influence of the external environment on the injection pump and the rotary distribution valve is avoided, and the use is safer; the built-in piston assembly can realize injection action, replaces additional purchase of an injector, saves cost, the rotary distribution valve does not use a circular rotary valve, but adopts an independently designed spiral valve core, a plurality of valve holes which are spirally formed are specially designed on the spiral valve core, the rotary distribution valve is installed in a special base structure, a linear valve hole is designed on a base, the rotary angle of the spiral valve core can be selected and driven according to operation requirements, and finally solvent flow paths of different valve holes are linearly switched and distributed.

Drawings

FIG. 1 is a schematic diagram of the overall internal structure of an embodiment of the present invention;

FIG. 2 is an overall isometric view of an embodiment of the present invention;

FIG. 3 is a side view of a first embodiment of a solenoid valve cartridge of the present invention;

FIG. 4 is a second schematic side view of a solenoid valve cartridge according to an embodiment of the present invention;

fig. 5 is a side view of a solenoid valve core according to an embodiment of the present invention.

Description of reference numerals:

the valve body base 1, the piston cavity 11, the switching valve cavity 12, the common hole 13, the switching hole A, B, C, D, E, F, G, H, the piston assembly 2, the telescopic motor 21, the piston 22, the sealing ring 23, the spiral valve core 3, the annular groove 31, the No. 0 hole 32, the central cavity 33, the valve holes a, b, c, d, e, f, g and h and the rotating motor 4.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides a linear multi-channel switching piston pump which comprises a valve body base 1, a piston assembly 2, a spiral valve core 3 and a rotating motor 4 as shown in figures 1 and 2.

Piston chamber 11 and switching valve chamber 12 are seted up respectively to valve body base 1 inside, piston assembly 2 seals up the cooperation and carries out piston motion in piston chamber 11, piston assembly 2 includes flexible motor 21, piston 22 and sealing washer 23, flexible motor 21's motor rod stretches into in piston chamber 11 to at end-to-end connection piston 22, piston 22 lateral wall set up the recess, supply sealing washer 23 cover is put, and piston 22 seals up the cooperation at piston chamber 11 inner wall, and flexible motor 21 drive piston 22 carries out piston motion in piston chamber 11.

The spiral valve core 3 is in sealing fit in the switching valve cavity 12, and the top of the spiral valve core 3 is connected with the rotating motor 4 to realize automatic rotation of the spiral valve core 3.

A communicated common hole 13 is arranged between the piston cavity 11 and the switching valve cavity 12, an annular groove 31 is arranged at the position of the spiral valve core 3 corresponding to the common hole 13, a No. 0 hole 32 is arranged in the annular groove 31, the No. 0 hole 32 is always communicated with the common hole 13 through the annular groove 31 no matter the angle, the piston assembly 2 pushes the solvent in the rodless cavity of the piston cavity 11 out of the No. 0 hole 32 through the common hole 13, and otherwise, the solvent is pumped into the rodless cavity through the common hole 13.

The spiral valve core 3 is of a cylindrical structure, a vertical central cavity 33 is arranged in the spiral valve core 3, a plurality of valve holes are formed in the outer side wall of the spiral valve core 3 at equal intervals and equal angles along the axial direction, the included angle of the valve holes and the number of the valve holes can be set according to needs, in a preferred embodiment, the included angle of two adjacent valve holes can be any value from 5 degrees to 30 degrees, the included angle is 30 degrees and eight valve holes are taken as examples in the embodiment, as shown in fig. 3-5, the valve holes are a, b, c, d, e, f, g and h in sequence, a No. 0 hole 32 is communicated with the valve holes a, b, c, d, e, f, g and h through the central cavity 33 all the time, switching holes with the number equal to that of the valve holes are formed in the axial direction in the outer wall of the valve body base 1, and the switching holes are A, B, C, D, A, B, C, D, E. F, G, H, when the spiral valve core 3 rotates at different angles, there is only one valve hole at different angles to communicate with one of the switch holes, the rest valve holes are in sealed state, each switch hole corresponds to a valve hole at the same level. As shown in figure 1, when in use, the rotating motor 4 drives the spiral valve core 3 to rotate, the origin valve hole a at the bottommost part of the spiral valve core 3 is communicated with the switching hole A of the valve body base 1 on the same level, the rest valve holes are sealed, the telescopic motor 21 pulls the piston 22 to move towards the rod cavity, the solvent is pumped into the rodless cavity through the switching hole A, the central cavity 33, the valve hole a, the No. 0 hole 32 and the common hole 13 in sequence, after the rotary motor 4 drives the spiral valve core 3 to rotate for 30 degrees, the valve hole B is communicated with the switching hole B of the valve body base 1 on the same level, the rest valve holes are sealed, finally the telescopic motor 21 pushes the piston 22 to move towards the rodless cavity, and the solvent in the rodless cavity is discharged through the switching hole B, so that linear multi-channel switching is realized. The built-in piston assembly 2 can realize the injection action, so the invention is an injector with the function of a distribution valve, the injector does not need to be purchased and used, the cost is greatly saved, and the use is convenient.

In addition, most of the existing injectors are purchased from outsourcing, are made of glass materials and cannot be durable to solvents such as hydrofluoric acid, and the like, so that the valve body base 1 can be made of stainless steel, PEEK or PVC materials, and the universality of the injector is improved.

The rotary distribution valve and the injection pump are integrated into a whole, and the compact and stable double-cavity structural design reduces the whole space of the pump valve and enables the injection pump and the rotary distribution valve to be arranged in the base, so that the influence of the external environment on the injection pump and the rotary distribution valve is avoided, and the use is safer; the invention fills the defects of the linear pump valve in the field and greatly promotes the development process of miniaturization, modularization and intellectualization of the linear pump valve.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the design of the present invention, and all equivalent changes made in the design key point of the present invention fall within the protection scope of the present invention.