CN215830654U

CN215830654U - High-precision trace electromagnetic quantitative pump

Info

Publication number: CN215830654U
Application number: CN202122400466.9U
Authority: CN
Inventors: 肖建奇
Original assignee: Dongguan Jurui Technology Co ltd
Current assignee: Dongguan Jurui Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-15
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to a high-precision micro electromagnetic constant delivery pump which comprises a pump body, a plunger, a movable iron core, a sleeve, a coil, a spring and a fixed iron core, wherein the sleeve is fixedly connected with the pump body, a constant volume cavity and a liquid suction channel communicated with the constant volume cavity are arranged in the pump body, the plunger is slidably sleeved in the constant volume cavity, a positioning sleeve sleeved with the plunger is embedded in the pump body, a cavity is arranged in the sleeve, the movable iron core is slidably sleeved in the cavity, the fixed iron core is fixedly arranged in the cavity, one end of the movable iron core is fixedly connected with the plunger, the other end of the movable iron core is connected with the fixed iron core through the spring, and the coil is sleeved on the outer side of the fixed iron core. The utility model adopts the plunger made of rigid material as a metering element, solves the problem of inaccurate quantitative precision caused by easy deformation of a rubber diaphragm in the conventional quantitative pump, and has more accurate quantification, higher repetition precision and high precision in the process of quantifying trace liquid.

Description

High-precision trace electromagnetic quantitative pump

Technical Field

The utility model relates to the technical field of electromagnetic pumps, in particular to a high-precision trace electromagnetic quantitative pump.

Background

At present, domestic environmental protection equipment, medical and chemical analysis instruments and high-end inspection equipment need micro-metering, a peristaltic pump and a metal plunger type or diaphragm type electromagnetic metering pump are mainly adopted during metering, the peristaltic pump is complex in structure, the precision is deteriorated along with the aging of a hose, the hose needs to be frequently replaced, and the maintenance is inconvenient; the existing metal plunger type electromagnetic quantitative pump cannot meet the requirement of micro high-precision metering due to the fact that the existing metal plunger type electromagnetic quantitative pump is not resistant to acid and alkali chemical reagents, and is low in precision of micro metering occasions and not widely used; the rubber diaphragm type electromagnetic quantitative pump has low quantitative precision, the rubber diaphragm is easy to age and break, the reliability is poor, and the structure of the rubber diaphragm type electromagnetic quantitative pump cannot meet the trace high-precision quantitative requirement.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a high-precision trace electromagnetic quantitative pump which can meet the use requirements of rapid, trace and high-precision quantification of corrosive chemical reagents and improve the quantification precision and reliability.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a high accuracy trace electromagnetism constant delivery pump, which comprises a pump body, the plunger, move the iron core, the sleeve, a coil, spring and decide the iron core, sleeve and pump body fixed connection, be provided with the imbibition passageway that ration chamber and quantitative chamber are linked together in the pump body, the ration intracavity is located to the plunger sliding sleeve, the embedded position sleeve that is provided with and closes with the plunger cover in the pump body, be provided with the cavity in the sleeve, it locates in the cavity to move the iron core sliding sleeve, decide the iron core fixed set up in the cavity, move the one end and the plunger fixed connection of iron core, move the other end of iron core and pass through the spring and be connected with deciding the iron core, the outside of deciding the iron core is located to the coil cover.

Further, the plunger is a rigid metal or non-metal plunger.

Furthermore, one end, far away from the pump body, of the sleeve is provided with an end cover, the end cover is matched with the fixed iron core plug bush, and the fixed iron core is provided with a nut in threaded connection.

Furthermore, an exhaust passage communicated with the cavity is formed in the fixed iron core.

Further, the plunger is matched with the movable iron core plug bush through the connecting portion, an annular glue groove is formed in the side wall of the connecting portion, and structural glue is filled in the glue groove.

Furthermore, a first sealing ring and a second sealing ring which are sleeved with the plunger are embedded in the pump body.

Furthermore, the first sealing ring is soft sealing, the second sealing ring is hard sealing, and the hard sealing is made of high polymer materials.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a high-precision trace electromagnetic quantitative pump, which can isolate the quantitative liquid from a movable iron core and a fixed iron core by completely separating a quantitative cavity from an electromagnetic part, thereby effectively preventing the liquid from corroding the movable iron core and the fixed iron core, wherein the working medium can be a corrosive chemical reagent; the metering element adopts the plunger of high accuracy, compares in present rubber diaphragm formula, can improve the repeated quantitative precision of constant delivery pump by a wide margin, and the plunger has high strength, high wear resistance, high stability, can adapt to multiple reagent, guarantees sufficient life to solved current rubber diaphragm yielding and brought the inaccurate problem of quantitative precision, therefore the measurement is more accurate, and the repeatability is higher, and the precision is higher when measuring trace liquid.

Drawings

The utility model is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the utility model, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a high-precision micro electromagnetic quantitative pump according to an embodiment of the present invention.

The reference numbers shown in the figures denote: 1. a pump body; 2. a plunger; 3. a first seal ring; 4. a second seal ring; 5. a positioning sleeve; 6. a connecting portion; 7. a movable iron core; 8. a sleeve; 9. a coil; 10. a spring; 11. fixing an iron core; 12. an end cap; 13. a nut; 14. a liquid suction channel; 15. a glue groove; 16. a cavity; 17. an exhaust passage.

Detailed Description

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the structure of the present invention is: the utility model provides a high accuracy trace electromagnetism constant delivery pump, including the pump body 1, plunger 2, move iron core 7, sleeve 8, coil 9, spring 10 and fixed iron core 11, sleeve 8 and the 1 fixed connection of the pump body, be provided with quantitative chamber in the pump body 1 and the imbibition passageway 14 that is linked together with quantitative chamber, the quantitative intracavity is located to plunger 2 sliding sleeve, the embedded position sleeve 5 that is provided with plunger 2 registrates in the pump body 1, be provided with cavity 16 in the sleeve 8, move iron core 7 sliding sleeve and locate in cavity 16, fixed iron core 11 is fixed to be set up in cavity 16, move iron core 7's one end and plunger 2 fixed connection, move iron core 7's the other end and pass through spring 10 and be connected with fixed iron core 11, the outside of fixed iron core 11 is located to coil 9 covers. The utility model forms the electromagnetic driving element by the movable iron core 7, the sleeve 8, the coil 9 and the fixed iron core 11, has simple structure, fast response and enough power, separates the quantitative cavity from the movable iron core 7 and the fixed iron core 11 completely, isolates the quantitative liquid from the movable iron core 7 and the fixed iron core 11, can effectively prevent the liquid from corroding the movable iron core 7 and the fixed iron core 11, can be corrosive chemical agents as working media, and has wider applicability.

Plunger 2 can be based on the operation requirement by quantitative liquid and adopt the metal or nonmetal material preparation of rigidity, for example adopt ceramic material's plunger, and ceramic plunger has high wear resistance, high stability's characteristics, guarantees that plunger 2 has sufficient life to solved current rubber diaphragm yielding and brought the inaccurate problem of ration precision, therefore the measurement is more accurate, and repeatability is higher, and the precision is higher when measuring trace liquid.

Preferably, one end of the sleeve 8, which is far away from the pump body 1, is provided with an end cover 12, the end cover 12 is in plug-in fit with the fixed iron core 11, the fixed iron core 11 is provided with a nut 13 in threaded connection, the position of the fixed iron core 11, which extends into the cavity 16, can be adjusted through the adjusting nut 13, and then the movement stroke of the movable iron core 7 is adjusted, so that the volume of liquid sucked and discharged in the quantitative cavity is adjustable, and the single liquid sucked and discharged amount can be adjusted as required and accurately controlled.

Preferably, an exhaust passage 17 communicated with the cavity 16 is formed in the fixed iron core 11, and the exhaust passage 16 is designed to facilitate the discharge of air between the movable iron core 7 and the fixed iron core 11, so that the moving position of the movable iron core 7 is more accurate in the liquid suction and discharge action process, and the quantitative accuracy is improved.

Preferably, plunger 2 is through connecting portion 6 and the cooperation of moving iron core 7 plug bush, and connecting portion 6 lateral wall is provided with annular gluey groove 15, and gluey inslot 15 intussuseption is filled with the structure and is glued, and the structure is glued to be meant intensity height, can bear great load, and ageing-resistant, fatigue-resistant, corrosion-resistant, and stable performance in life expectancy is applicable to the adhesive that bears the bonding of powerful structure, uses the connecting portion 6 of structural adhesive subsides plunger 2, simple to operate, stable in structure simultaneously.

Preferably, the pump body 1 is internally embedded with a first sealing ring 3 and a second sealing ring 4 which are sleeved with the plunger 2, and the first sealing ring 3 and the second sealing ring 4 are arranged to ensure that the side wall of the plunger 2 and the inner wall of the quantitative cavity have higher sealing performance and are not easy to leak, so that the quantitative accuracy of the volume of liquid is ensured.

Preferably, the first sealing ring 3 is soft seal, the soft seal is made of soft materials such as rubber, silica gel and fluororubber, the sealing performance of the soft seal is good, zero leakage can be realized, but the service life and the adaptability to temperature of the soft seal are poor, and the soft seal is easy to wear; the second sealing ring 4 is a hard seal, and the hard seal is made of a high polymer material, such as UPE (ultra high molecular weight polyethylene), PTFE (polytetrafluoroethylene), PFA plastic, etc., and the soft seal and the hard seal are combined to ensure good sealing performance between the plunger 2 and the inner wall of the quantitative cavity, so that leakage is not easy to occur, and the second sealing ring 4 can resist high temperature, resist abrasion and has good mechanical performance by using the hard seal, so as to improve the precision of liquid suction and discharge.

When the electromagnetic sucking device is used specifically, one end of the movable iron core 7 in the electromagnet structure is stuck with the fixed plunger 2 by using a special structural adhesive, when specified current is introduced into the coil 9, a magnetic field is generated, the magnetic field forms a magnetic loop through the sleeve 8, the fixed iron core 11 and the movable iron core 7, and finally electromagnetic force is formed between the fixed iron core 11 and the movable iron core 7 to suck the movable iron core 7, so that the plunger 2 is driven to move, a negative pressure is formed in a sealed part quantitative cavity in the pump body 1, and liquid sucking action is completed for liquid in the liquid sucking channel 14. After the liquid suction is finished, the coil 9 is powered off, the movable iron core 7 and the plunger 2 are separated from the fixed iron core 11 and move upwards under the thrust action of the spring 10 until the movable iron core is dead against the quantitative cavity, and the liquid discharging action is finished. The suction and the release of the movable iron core 7 can be controlled by controlling the on-off of the current of the coil 9, the control is repeated continuously and circularly, and the movable iron core 7 drives the plunger 2 to do continuous reciprocating motion, so that the suction and discharge actions are realized. The volume of the single liquid suction and discharge is determined by the stroke of the movable iron core 7 and the diameter of the plunger 2, and the movable iron core 7, the plunger 2 and the positioning sleeve 5 are rigid parts and are fixed after being adjusted, so that the volume repetition precision of the liquid suction and discharge is very high. The utility model also integrates a control panel, and the action of the constant delivery pump can be controlled only by simply providing pulse voltage.

The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.

Claims

1. The utility model provides a high accuracy trace electromagnetism constant delivery pump which characterized in that: comprises a pump body (1), a plunger (2), a movable iron core (7), a sleeve (8), a coil (9), a spring (10) and a fixed iron core (11), the sleeve (8) is fixedly connected with the pump body (1), a quantitative cavity and a liquid suction channel (14) communicated with the quantitative cavity are arranged in the pump body (1), the plunger (2) is sleeved in the quantitative cavity in a sliding manner, a positioning sleeve (5) sleeved with the plunger (2) is embedded in the pump body (1), a cavity (16) is arranged in the sleeve (8), the movable iron core (7) is sleeved in the cavity (16) in a sliding way, the fixed iron core (11) is fixedly arranged in the cavity (16), one end of the movable iron core (7) is fixedly connected with the plunger (2), the other end of the movable iron core (7) is connected with a fixed iron core (11) through a spring (10), and the coil (9) is sleeved on the outer side of the fixed iron core (11).

2. A high-precision micro electromagnetic dosing pump as claimed in claim 1, wherein: the plunger (2) is a rigid metal or nonmetal plunger.

3. A high-precision micro electromagnetic dosing pump as claimed in claim 1, wherein: one end of the sleeve (8) far away from the pump body (1) is provided with an end cover (12), the end cover (12) is matched with a fixed iron core (11) in an inserting sleeve mode, and a nut (13) in threaded connection is arranged on the fixed iron core (11).

4. A high-precision micro electromagnetic dosing pump as claimed in claim 1, wherein: an exhaust passage (17) communicated with the cavity (16) is formed in the fixed iron core (11).

5. A high-precision micro electromagnetic dosing pump as claimed in claim 1, wherein: plunger (2) are through connecting portion (6) and the cooperation of moving iron core (7) plug bush, annular gluey groove (15) have been seted up to connecting portion (6) lateral wall, gluey inslot (15) intussuseption is filled with the structure and is glued.

6. A high-precision micro electromagnetic dosing pump as claimed in claim 1, wherein: a first sealing ring (3) and a second sealing ring (4) which are sleeved with the plunger (2) are embedded into the pump body (1).

7. A high accuracy micro electromagnetic dosing pump as claimed in claim 6 wherein: the first sealing ring (3) is soft sealing, the second sealing ring (4) is hard sealing, and the hard sealing is made of high polymer materials.