CN218376823U

CN218376823U - High-precision electromagnetic metering pump

Info

Publication number: CN218376823U
Application number: CN202222537655.5U
Authority: CN
Inventors: 江河
Original assignee: Shanxi Wenlong Zhongmei Huanneng Technology Co ltd
Current assignee: Shanxi Wenlong Zhongmei Huanneng Technology Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-01-24
Anticipated expiration: 2032-09-23

Abstract

The utility model discloses a high-precision electromagnetic metering pump, a left pump head mechanism and a right pump head mechanism are arranged in a pump body, the left pump head mechanism comprises a left pump cavity and a left electromagnetic driving component, the right pump head mechanism comprises a right pump cavity and a right electromagnetic driving component, the left pump cavity and the right pump cavity are respectively provided with a liquid inlet channel communicated with the liquid inlet structure and a liquid outlet channel communicated with the liquid outlet structure, the liquid inlet channel is provided with a liquid suction valve group, and the liquid outlet channel is provided with a liquid discharge valve group; the left electromagnetic driving assembly and the right electromagnetic driving assembly respectively comprise an electromagnetic coil and an electromagnetic push rod, an iron core is arranged between the two electromagnetic push rods, diaphragms corresponding to the electromagnetic push rods are arranged in the left pump cavity and the right pump cavity, and the electromagnetic push rods can receive the driving of the iron cores to drive the diaphragms. The utility model provides a high accuracy electromagnetism measuring pump both can promote the measurement flow of electromagnetism measuring pump, can control its precision again to can be applicable to different application scenes.

Description

High-precision electromagnetic metering pump

Technical Field

The utility model relates to a measuring pump technical field especially relates to a high accuracy electromagnetism measuring pump.

Background

The electromagnetic metering pump drives the diaphragm to reciprocate in the pump head by utilizing the electromagnetic push rod, so that the volume and the pressure of a chamber of the pump head are changed, and the liquid suction valve and the liquid discharge valve are opened and closed due to the change of the pressure, thereby realizing the quantitative suction and discharge of liquid. The electromagnetic metering pump is a metering pump which is driven by an electromagnet and is designed for conveying small-flow low-pressure pipeline liquid, and is popular in the industry due to simple structure, low energy consumption, accurate metering and convenient adjustment.

If the grant bulletin number is CN 20724547U, the grant bulletin day is 2018 4 month 17 days, the utility model discloses a diaphragm device and have the electromagnetic metering pump's of diaphragm device patent application, it includes the electromagnetism connecting rod, the diaphragm, be connected with the baffle between electromagnetism connecting rod and the diaphragm, the baffle is located diaphragm and electromagnetism connecting rod fixed connection's terminal surface, the baffle is fixed on the terminal surface, the diaphragm forms sealed pump chamber structure with the pump head, this patent application is when using, through the reciprocal motion of electromagnetism connecting rod drive diaphragm in pump chamber structure in order to realize the suction and the discharge of liquid.

The existing electromagnetic metering pump has the problems of small metering flow (commonly <90 liters per hour) and low requirement on pipeline pressure in the process of driving a diaphragm through an electromagnetic push rod to realize liquid suction and discharge, and cannot be used in scenes with large metering flow and high precision requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high accuracy electromagnetism measuring pump to solve the above-mentioned weak point among the prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

a high-precision electromagnetic metering pump comprises a pump body, wherein a liquid inlet structure and a liquid outlet structure are arranged on the pump body, a left pump head mechanism and a right pump head mechanism are arranged inside the pump body, the left pump head mechanism comprises a left pump cavity and a left electromagnetic driving assembly, the right pump head mechanism comprises a right pump cavity and a right electromagnetic driving assembly, the left pump cavity and the right pump cavity are respectively provided with a liquid inlet channel communicated with the liquid inlet structure and a liquid outlet channel communicated with the liquid outlet structure, a liquid suction valve group is arranged on the liquid inlet channel, and a liquid discharge valve group is arranged on the liquid outlet channel; the left electromagnetic driving assembly and the right electromagnetic driving assembly respectively comprise an electromagnetic coil and an electromagnetic push rod, an iron core is arranged between the electromagnetic push rods, a power-on circuit is connected to the electromagnetic coil, diaphragms corresponding to the electromagnetic push rods are arranged in the left pump cavity and the right pump cavity, and the electromagnetic push rods can receive the driving of the iron core so as to drive the diaphragms.

Foretell high accuracy electromagnetism measuring pump, the inside encapsulation of the pump body has the magnet conduction shell, electromagnetism push rod is including setting up magnetic conduction post and push rod in the magnet conduction shell, magnetic conduction post and the coaxial setting of push rod.

In the high-precision electromagnetic metering pump, the magnetic conduction column is provided with the through hole along the axial direction, the two end faces of the iron core are both fixedly provided with the push rod along the axial direction, and the push rod penetrates through the through hole to be connected with the membrane.

In the high-precision electromagnetic metering pump, the two electromagnetic coils are arranged inside the magnetic conductive magnet shell and located at two ends of the magnetic conductive magnet shell, the electromagnetic coils are sleeved outside the magnetic conductive columns, and two ends of the iron core are respectively located inside the electromagnetic coils.

The high-precision electromagnetic metering pump further comprises a diaphragm supporting piece, wherein the diaphragm supporting piece is arranged between the push rod and the diaphragm and used for supporting and protecting the diaphragm.

In the high-precision electromagnetic metering pump, the diaphragm supporting piece comprises a circular piece and a ring-shaped piece arranged around the circular piece, the push rod is connected with the diaphragm through the circular piece, and the ring-shaped piece is connected with the circular piece through the arc-shaped connecting strip.

Foretell high accuracy electromagnetism measuring pump, be provided with first annular magnetism on the annular member and inhale the piece, be provided with annular installation department on the diaphragm, it inhales the piece to be provided with the second annular magnetism on the annular installation department, the magnetism of piece is inhaled to first annular magnetism with the magnetism of piece is inhaled to the second annular magnetism is different.

In the technical scheme, the utility model provides a high accuracy measuring pump, be provided with feed liquor structure and play liquid structure on the pump body, inside left pump head mechanism and the right pump head mechanism of being provided with of the pump body, left pump head mechanism includes left pump chamber and left electromagnetic drive subassembly, right pump head mechanism includes right pump chamber and right electromagnetic drive subassembly, the in-service use in-process, the left electromagnetic drive subassembly of accessible and right electromagnetic drive subassembly are respectively at left pump chamber and right pump chamber work, make left pump chamber and right pump chamber can the combined use, both can promote the measurement flow of electromagnetic measuring pump, can control its precision again, thereby can be applicable to different application scenes.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

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

fig. 2 is a schematic structural diagram of a pump body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a diaphragm support according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a diaphragm according to an embodiment of the present invention.

Description of the reference numerals:

1. a pump body; 1.1, a liquid inlet structure; 1.2, liquid outlet structure; 1.3, a left pump cavity; 1.4, a right pump cavity; 1.5, a liquid inlet channel; 1.6, a liquid outlet channel; 1.7, a liquid suction valve group; 1.8, a liquid discharge valve group; 2. a left pump head mechanism; 2.1, a left electromagnetic driving component; 3. a right pump head mechanism; 3.1, a right electromagnetic driving component; 4. a magnetic conductive magnet case; 4.1, a push rod; 4.2, a magnetic conduction column; 4.3, iron core; 4.4, a motion cavity; 4.5, a membrane; 4.6, electromagnetic coils; 5. a diaphragm support; 5.1, round piece; 5.2, a ring-shaped member; 5.3, arc-shaped connecting strips; 5.4, a first annular magnetic part; 5.5, a second annular magnetic suction piece.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-4, an embodiment of the present invention provides a high-precision electromagnetic metering pump, including a pump body 1, a liquid inlet structure 1.1 and a liquid outlet structure 1.2 are provided on the pump body 1, a left pump head mechanism 2 and a right pump head mechanism 3 are provided inside the pump body 1, the left pump head mechanism 2 includes a left pump cavity 1.3 and a left electromagnetic driving component 2.1, the right pump head mechanism 3 includes a right pump cavity 1.4 and a right electromagnetic driving component 3.1, the left pump cavity 1.3 and the right pump cavity 1.4 are respectively provided with a liquid inlet channel 1.5 communicated with the liquid inlet structure 1.1 and a liquid outlet channel 1.6 communicated with the liquid outlet structure 1.2, the liquid inlet channel 1.5 is provided with a liquid valve group 1.7, and the liquid outlet channel 1.6 is provided with a liquid discharge valve group 1.8; the left electromagnetic driving assembly 2.1 and the right electromagnetic driving assembly 3.1 both comprise coils and electromagnetic push rods 4.1, iron cores 4.3 are arranged between the two electromagnetic push rods 4.1, the coils are connected with a power-on circuit, diaphragms 4.5 corresponding to the electromagnetic push rods 4.1 are arranged in the left pump cavity 1.3 and the right pump cavity 1.4, and the electromagnetic push rods 4.1 can receive the driving of the iron cores 4.3 to drive the diaphragms 4.5.

Specifically, the pump body 1 comprises a housing and a structure arranged inside the housing, a liquid inlet structure 1.1 and a liquid outlet structure 1.2 are arranged on the housing, the liquid inlet structure 1.1 is used for conveying liquid into the pump body 1, the liquid outlet structure 1.2 is used for discharging the liquid in the pump body 1, the liquid inlet structure 1.1 can be a liquid inlet pipeline or a liquid inlet, the liquid outlet structure 1.2 can also be a liquid outlet pipeline or a liquid outlet, the liquid inlet structure 1.1 and the liquid outlet structure 1.2 are respectively arranged at two opposite ends of the pump body 1, optionally, the liquid inlet structure 1.1 and the liquid outlet structure 1.2 are respectively arranged at the bottom and the top of the pump body 1, a left pump head mechanism 2 and a right pump head mechanism 3 are arranged inside the pump body 1, the left pump head mechanism 2 and the right pump head mechanism 3 can be sequentially staggered to perform liquid suction and liquid discharge operations, the left pump head mechanism 2 comprises a left pump cavity 1.3 arranged inside the housing, the right pump head mechanism 3 comprises a right pump cavity 1.4 arranged inside the housing, the left pump cavity 1.3 and the right pump cavity 1.4 are both communicated with the liquid inlet structure 1.1 through the liquid inlet channel 1.5, the left pump cavity 1.3 and the right pump cavity 1.4 are both communicated with the liquid outlet structure 1.2 through the liquid outlet channel 1.6, therefore, in the liquid conveying process, liquid is conveyed to the liquid inlet structure 1.1 and then is shunted and conveyed to the left pump cavity 1.3 and the right pump cavity 1.4 through the two liquid inlet channels 1.5, in the liquid outputting process of the pump body 1, the liquid is output through the two liquid outlet channels 1.6 and then is converged to the liquid outlet structure 1.2 for output, a liquid suction valve group 1.7 and a liquid discharge valve group 1.8 are respectively arranged in the liquid inlet channel 1.5 and the liquid outlet channel 1.6, the liquid inlet channel 1.5 is opened or closed through the liquid suction valve group 1.7, the liquid discharge valve group 1.8 is used for controlling the opening or closing of the liquid outlet channel 1.6, so that the liquid can only flow along the directions of the liquid inlet structure 1.1.1, the liquid inlet channel 1.5, the left pump cavity 1.3, the right pump cavity 1.4, the liquid outlet channel 1.6 and the liquid outlet structure 1.2, liquid suction valve group 1.7 and flowing back valve group 1.8 can be the ball check valve commonly used, also can be other types of check valve, it is the common structure among the prior art, no longer give details, so in the in-service use in-process, accessible left pump chamber 1.3 and right pump chamber 1.4 combined use, both can promote the measurement flow of electromagnetic metering pump, can control its precision again, if through left pump chamber 1.3 and right pump chamber 1.4 simultaneous alternate work, make the measurement flow of electromagnetic metering pump be the twice of single pump chamber, for example again, when realizing the liquid flow of 60 litres per hour through single pump chamber and carrying, this electromagnetic metering pump accessible left pump chamber 1.3 and right pump chamber 1.4 simultaneous alternate work, make left pump chamber 1.3 and right pump chamber 1.4 be the liquid flow of 30 litres per hour and carry, the flow reduction of single pump chamber, be convenient for its control to the precision, thereby promote the holistic precision of electromagnetic metering pump.

In this embodiment, the left pump head mechanism 2 and the right pump head mechanism 3 are disposed inside the housing, it should be noted that the internal components of the pump body 1 are not limited to the left pump head mechanism 2 and the right pump head mechanism 3, and may also include other components in the existing pump body 1, such as a stroke adjusting mechanism, a speed ratio turbine mechanism, a transmission mechanism, etc., which are not described herein separately, the left pump head mechanism 2 includes a left electromagnetic driving component 2.1 corresponding to the left pump cavity 1.3, the right pump body 1 mechanism includes a right electromagnetic driving component 3.1 corresponding to the right pump cavity 1.4, both the left electromagnetic driving component 2.1 and the right electromagnetic driving component 3.1 include a coil and an electromagnetic push rod 4.1, the coil is connected with an energizing circuit, the diaphragm 4.5 corresponding to the electromagnetic push rod 4.1 is arranged in each of the left pump chamber 1.3 and the right pump chamber 1.4, the left electromagnetic driving component 2.1 is a driving structure for driving the diaphragm 4.5 in the left pump chamber 1.3, the right electromagnetic driving component 3.1 is a driving structure for driving the diaphragm 4.5 in the right pump chamber 1.4, the diaphragm 4.5 in the left pump chamber 1.3 and the diaphragm 4.5 in the right pump chamber 1.4 both have a liquid suction process and a liquid discharge process, it needs to be noted that when the diaphragm 4.5 in the left pump chamber 1.3 is in the liquid suction process, the diaphragm 4.5 in the right pump chamber 1.4 is in the liquid discharge process, and when the diaphragm 4.5 in the right pump chamber 1.4 is in the liquid suction process, the diaphragm 4.5 in the left pump chamber 1.3 is in the liquid discharge process, so as to work alternately, and the frequency of liquid suction and liquid discharge of the electromagnetic pump chamber is increased.

In this embodiment, the liquid suction process and the liquid discharge process of the diaphragm 4.5 in the left pump chamber 1.3 and the diaphragm 4.5 in the right pump chamber 1.4 are the same, and the following description is given by the working process of the diaphragm 4.5 in the left pump chamber 1.3, and the liquid suction process is: the electromagnetic push rod 4.1 of the left electromagnetic driving assembly 2.1 moves towards the side far away from the left pump cavity 1.3, so that the diaphragm 4.5 is driven to move, the diaphragm 4.5 bends and deforms towards the right, so that the left pump cavity 1.3 generates negative pressure, at the moment, the liquid suction valve group 1.7 is opened, the liquid discharge valve group 1.8 is closed, liquid is conveyed into the left pump cavity 1.3 through the liquid inlet channel 1.5, and when the electromagnetic push rod 4.1 moves towards the right to a rear dead center, the electromagnetic push rod 4.1 and the diaphragm 4.5 stop moving, so that liquid suction is completed; the liquid drainage process is as follows: the electromagnetism push rod 4.1 of left side electromagnetism drive assembly 2.1 moves left pump chamber 1.3 to drive diaphragm 4.5 and move left pump chamber 1.3 internal motion, diaphragm 4.5 extrudees left pump chamber 1.3, and the liquid in the left pump chamber 1.3 pressurizes gradually, and under the effect of pressure, imbibition valves 1.7 are closed, and flowing back valves 1.8 are opened, thereby discharge liquid in the left pump chamber 1.3.

The utility model provides a high accuracy measuring pump, be provided with feed liquor structure 1.1 on the pump body 1 and go out liquid structure 1.2, 1 inside left pump head mechanism 2 and the right pump head mechanism 3 of being provided with of the pump body, left pump head mechanism 2 includes left pump chamber 1.3 and left electromagnetic drive subassembly 2.1, right pump head mechanism 3 includes right pump chamber 1.4 and right electromagnetic drive subassembly 3.1, in the in-service use process, accessible left electromagnetic drive subassembly 2.1 and right electromagnetic drive subassembly 3.1 work at left pump chamber 1.3 and right pump chamber 1.4 respectively, make left pump chamber 1.3 and right pump chamber 1.4 can the combined use, both can promote the measurement flow of electromagnetic measuring pump, can control its precision again, thereby can be applicable to different application scenes.

In this embodiment, preferably, a magnetic conductive iron shell 4 is disposed inside the pump body 1, the electromagnetic push rod 4.1 includes a magnetic conductive column 4.2 and a push rod 4.1 disposed inside the magnetic conductive iron shell 4, the magnetic conductive iron shell 4 is hollow, both ends of the magnetic conductive iron shell inwardly form the magnetic conductive column 4.2, the magnetic conductive column 4.2 is also of a cylindrical structure, the magnetic conductive column 4.2 and the magnetic conductive iron shell 4 are of an integrally formed structure, a moving cavity 4.4 for the iron core 4.3 to move is formed between the two magnetic conductive columns 4.2, the two magnetic conductive columns 4.2 and the iron core 4.3 are both coaxial with the magnetic conductive iron shell 4, along the axial direction of the magnetic conductive iron shell 4, the iron core 4.3 is disposed at a middle position of the magnetic conductive iron shell 4, the magnetic conductive column 4.2 is formed at a left side of the magnetic conductive iron shell 4 and a right side of the magnetic conductive iron shell 4, the moving cavity 4.4 is disposed between the two magnetic conductive columns 4.2, the length of the moving cavity 4.4 is greater than the length of the iron core 4.3, and the iron core 4 can reciprocate in the moving cavity 4.4.

In this embodiment, preferably, the two electromagnetic coils 4.6 are disposed inside the magnetic conductive iron case 4 and located at two ends of the magnetic conductive iron case 4, the electromagnetic coils 4.6 are disposed outside the magnetic conductive posts 4.2, two ends of the iron core 4.3 are respectively located inside the electromagnetic coils 4.6, the two electromagnetic coils 4.6 are not in contact with each other, that is, the two electromagnetic coils 4.6 are respectively located at the left end and the right end of the magnetic conductive iron case 4, each electromagnetic coil 4.6 is sleeved with one end of one magnetic conductive post 4.2 and one end of the iron core 4.3, each electromagnetic coil 4.6 forms an electromagnetic assembly with the magnetic conductive post 4.2 and the end of the iron core 4.3 inside thereof, when the electromagnetic coils 4.6 are energized, a magnetic field is generated, and the magnetic force is attracted between the magnetic conductive posts 4.2 and the iron core 4.3 through the magnetic force effect, when the electromagnetic coils 4.6 are de-energized, the magnetic field disappears, and no magnetic force effect is generated between the magnetic conductive posts 4.2 and the iron core 4.3, and the separation occurs.

In this embodiment, preferably, a shaft sleeve for moving the iron core 4.3 is disposed on an inner wall of the magnetic conductive iron shell 4, the shaft sleeve protects the iron core 4.3 from abrasion during movement, the iron core 4.3 is protected, each magnetic conductive column 4.2 is provided with an axial through hole, two end faces of the iron core 4.3 are fixedly provided with a push rod 4.1 extending in the axial direction, the push rod 4.1 penetrates through the through hole to be connected with the diaphragm 4.5, and at this time, the iron core 4.3 with the push rod 4.1 can reciprocate in a movement cavity 4.4 formed by the two magnetic conductive columns 4.2.

In this embodiment, preferably, when in use, the left electromagnetic coil 4.6 is not energized, and the right electromagnetic coil 4.6 is energized, the right electromagnetic coil 4.6 provides a magnetic field, under the action of magnetic force, the right end face of the iron core 4.3 moves towards the end face of the right magnetic conductive column 4.2 in the moving cavity 4.4, and the right end of the iron core 4.3 is attracted to the right magnetic conductive column 4.2, in this process, the iron core 4.3 and the push rod 4.1 move to the right, so that the diaphragm 4.5 compresses the liquid in the right pump cavity 1.4, so that the liquid is discharged from the liquid outlet channel 1.6, at this time, the right pump cavity 1.4 is in a liquid discharge process, in this process, the left pump cavity 1.3 is in a process, and then the left electromagnetic coil 4.6 is energized, and under the condition that the right electromagnetic coil 4.6 is not in a liquid discharge, the left electromagnetic coil 4.6 provides a magnetic field, and under the action of magnetic force, the left end face of the iron core 4.3 moves towards the end face of the left magnetic conduction column 4.2 in the moving cavity 4.4, the left end of the iron core 4.3 is attracted with the left magnetic conduction column 4.2, in the process, the iron core 4.3 and the push rod 4.1 move leftwards so that the diaphragm 4.5 compresses liquid in the left pump cavity 1.3, and the liquid is discharged from the liquid outlet channel 1.6, in the process, the iron core 4.3 moves leftwards so that the push rod 4.1 connected with the right diaphragm 4.5 synchronously moves leftwards to drive the diaphragm 4.5 to move, and the diaphragm 4.5 deflects leftwards to deform so that the right pump cavity 1.4 generates negative pressure, at the moment, the liquid suction valve group 1.7 is opened, the liquid discharge valve group 1.8 is closed, the liquid is conveyed into the right pump cavity 1.4 through the liquid inlet channel 1.5 to form liquid suction, at the moment, the left pump cavity 1.3 is in a liquid discharge process, and the right pump cavity 1.4 is in a liquid discharge process.

In this embodiment, the electromagnetic metering pump is in the use, provide thrust for diaphragm 4.5 through push rod 4.1, thereby make diaphragm 4.5 take place deformation, current diaphragm 4.5 is the mode of point contact with push rod 4.1, carry out reciprocating motion in-process under thrust, when pump chamber internal pressure changes, produce the unstable phenomenon of velocity of flow very easily, be unfavorable for raising the efficiency, simultaneously under the long-term atress condition, also can produce the deformation of diaphragm 4.5, it is impaired, life shortens, therefore the electromagnetic metering pump in this embodiment still includes diaphragm support piece 5, diaphragm support piece 5 sets up between push rod 4.1 and diaphragm 4.5, contact area between multiplicable push rod 4.1 and diaphragm 4.5 through diaphragm support piece 5, thereby realize supporting the protection to diaphragm 4.5.

In this embodiment, preferably, the rear diaphragm supporting member 5 includes a circular member 5.1 and a ring member 5.2 disposed around the circular member 5.1, the electromagnetic push rod 4.1 is connected to the diaphragm 4.5 through the circular member 5.1, the ring member 5.2 is connected to the circular member 5.1 through an arc-shaped connecting strip 5.3, a plurality of arc-shaped connecting strips 5.3 are provided, the connection between the circular member 5.1 and the ring member 5.2 is achieved through a plurality of arc-shaped connecting strips 5.3, so that the push rod 4.1 applies pressure to the diaphragm 4.5 through the circular member 5.1 and the ring member 5.2, and the diaphragm 4.5 is protected.

In this embodiment, preferably, the annular member 5.2 is provided with a first annular magnetic attraction member 5.4, the diaphragm 4.5 is provided with an annular mounting portion, the annular mounting portion is provided with a second annular magnetic attraction member 5.5, and the magnetism of the first annular magnetic attraction member 5.4 is different from that of the second annular magnetic attraction member 5.5; first annular magnetic attraction piece 5.4 and second annular magnetic attraction piece 5.5 correspond the setting, so when using, when push rod 4.1 promoted diaphragm 4.5 and does the flowing back process, loop forming element 5.2 and loop forming element 5.1 promoted diaphragm 4.5 motion jointly, when push rod 4.1 pulling diaphragm 4.5 was the imbibition process, loop forming element 5.1 pulled diaphragm 4.5, and first annular magnetic attraction piece 5.4 attracts second annular magnetic attraction piece 5.5, thereby provide a pulling force for diaphragm 4.5, make diaphragm 4.5 and push rod 4.1 simultaneous movement, because diaphragm 4.5 can take place deformation in flowing back process and imbibition process, inhale 5.5.5 through first annular magnetic attraction piece 5.4 and second annular magnetic attraction piece 5.5 and realize the non-fixed connection between loop forming element 5.2 and the diaphragm 4.5, can enough increase the area of contact between push rod 4.1 and the diaphragm 4.5, avoid 5.2 to produce the influence to diaphragm 4.5's deformation again.

Certain exemplary embodiments of the present invention have been described above by way of illustration only, and it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A high-precision electromagnetic metering pump comprises a pump body, wherein a liquid inlet structure and a liquid outlet structure are arranged on the pump body, and the high-precision electromagnetic metering pump is characterized in that a left pump head mechanism and a right pump head mechanism are arranged inside the pump body;

the left electromagnetic driving assembly and the right electromagnetic driving assembly respectively comprise an electromagnetic coil and an electromagnetic push rod, an iron core is arranged between the electromagnetic push rods, a power-on circuit is connected to the electromagnetic coil, diaphragms corresponding to the electromagnetic push rods are arranged in the left pump cavity and the right pump cavity, and the electromagnetic push rods can receive the driving of the iron core so as to drive the diaphragms.

2. The high-precision electromagnetic metering pump according to claim 1, wherein a magnet guiding shell is encapsulated inside the pump body, the electromagnetic push rod comprises a magnet guiding column and a push rod which are arranged inside the magnet guiding shell, and the magnet guiding shell, the magnet guiding column and the push rod are coaxially arranged.

3. The high-precision electromagnetic metering pump according to claim 2, wherein the flux-conducting post is axially provided with a through hole, the two end faces of the iron core are both fixedly provided with the push rod along the axial direction, and the push rod passes through the through hole and is connected with the diaphragm.

4. The high-precision electromagnetic metering pump according to claim 3, wherein the two electromagnetic coils are disposed inside the magnetic conductive magnet shell and located at two ends of the magnetic conductive magnet shell, the electromagnetic coils are sleeved outside the magnetic conductive columns, and two ends of the iron core are respectively located inside the electromagnetic coils.

5. The high accuracy electromagnetic metering pump of claim 3, further comprising a diaphragm support disposed between said push rod and said diaphragm for supporting and protecting said diaphragm.

6. The high accuracy electromagnetic metering pump of claim 5, wherein the diaphragm support member comprises a circular member through which the push rod is connected to the diaphragm, and an annular member disposed around the circular member, the annular member being connected to the circular member through an arcuate connecting strip.

7. The high-precision electromagnetic metering pump of claim 6, wherein the annular member is provided with a first annular magnetic attraction member, the diaphragm is provided with an annular mounting portion, the annular mounting portion is provided with a second annular magnetic attraction member, and the first annular magnetic attraction member has a magnetic property different from that of the second annular magnetic attraction member.