CN218376824U - High-precision metering pump - Google Patents
High-precision metering pump Download PDFInfo
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- CN218376824U CN218376824U CN202222550241.6U CN202222550241U CN218376824U CN 218376824 U CN218376824 U CN 218376824U CN 202222550241 U CN202222550241 U CN 202222550241U CN 218376824 U CN218376824 U CN 218376824U
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Abstract
The utility model discloses a high-precision metering pump, which comprises a driving device arranged in a pump body and a left cylinder body component and a right cylinder body component which are positioned at two opposite sides of the driving device, wherein a left pump cavity and a right pump cavity are respectively arranged at two opposite sides of the driving device in the pump body, a liquid inlet channel and a liquid outlet channel are respectively connected on the left pump cavity and the right pump cavity, and a liquid suction valve group and a liquid discharge valve group are respectively arranged in the liquid inlet channel and the liquid outlet channel; the driving device comprises a driving unit and an eccentric wheel connected with the driving unit, the left cylinder body assembly comprises a left push rod and a left diaphragm arranged at the end part of the left push rod, the right cylinder body assembly comprises a right push rod and a right diaphragm arranged at the end part of the right push rod, the left diaphragm and the right diaphragm are respectively positioned in the left pump cavity and the right pump cavity, and the left push rod and the right push rod are respectively positioned on two opposite sides of the eccentric wheel. The utility model provides a high accuracy measuring pump when guaranteeing that the pump body has the high accuracy, promotes the flow output scope of measuring pump, is applicable to different application scenes.
Description
Technical Field
The utility model relates to a measuring pump technical field especially relates to a high-precision measuring pump.
Background
The metering pump is a special displacement pump which can meet various strict technological process requirements, the flow can be steplessly regulated within the range of 0-100%, and is used for conveying liquid (especially corrosive liquid), the metering precision of the common metering pump is not high enough, the sealing performance is not good enough, the diaphragm type metering pump utilizes a flexible diaphragm which is specially designed and processed to replace a piston, reciprocating motion is realized under the action of a driving mechanism, the processes of suction and discharge are completed, and the electric diaphragm pump really realizes the isolation between the metered fluid and a driving lubricating mechanism in structure due to the isolation effect of the diaphragm, has high metering precision, and is a main force pump type in fluid metering application at present.
The diaphragm measuring pump is mostly to lean on the diaphragm distortion reciprocal at the during operation, it comes imbibition flowing back to change pump chamber volume change, for example, the publication number of authorizing is CN203770052U, the publication date of authorizing is 2014 8 months 13 days, the name is a utility model patent application of hydraulic pressure diaphragm type measuring pump, it includes the pump head, the lower part import department and the upper portion exit of pump head are provided with the check valve assembly respectively, the plunger is connected to one side of pump head, the outside of plunger is provided with the cylinder liner, be provided with the cylinder liner clamp plate on the cylinder liner, be provided with the hydraulic part assembly between plunger and the pump head, be provided with the diaphragm between hydraulic part assembly and the pump head, be provided with limit valve between diaphragm and the hydraulic part assembly, the upper portion of hydraulic part assembly is provided with the overload valve assembly, the lower part of hydraulic part assembly is provided with the oil supplementing valve assembly. The driving device drives the plunger piston to reciprocate in the cylinder sleeve, and the hydraulic oil drives the diaphragm to deform under the vacuum state, so that the liquid is alternately sucked and discharged under the control of the one-way valve. When the existing diaphragm metering pump is used, the precision is high, but the volume change of the pump cavity at each time determines the liquid discharge quantity, so that the flow application range is small, and the industrial application of the diaphragm metering pump is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high accuracy 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 metering pump comprises a pump body, wherein a liquid inlet part and a liquid outlet part are arranged on the pump body, the high-precision metering pump also comprises a driving device arranged in the pump body, and a left cylinder body assembly and a right cylinder body assembly which are positioned on two opposite sides of the driving device, a left pump cavity and a right pump cavity are respectively arranged on two opposite sides of the driving device in the pump body, a liquid inlet channel and a liquid outlet channel are respectively connected to the left pump cavity and the right pump cavity, and a liquid suction valve group and a liquid discharge valve group are respectively arranged in the liquid inlet channel and the liquid outlet channel;
the driving device comprises a driving unit and an eccentric wheel connected with the driving unit, the left cylinder body assembly comprises a left push rod and a left diaphragm arranged at the end part of the left push rod, the right cylinder body assembly comprises a right push rod and a right diaphragm arranged at the end part of the right push rod, the left diaphragm and the right diaphragm are respectively positioned in the left pump cavity and the right pump cavity, the left push rod and the right push rod are respectively positioned at two opposite sides of the eccentric wheel, and the eccentric wheel rotates to correspondingly drive the left push rod and the right push rod to sequentially stagger and make a liquid discharge stroke.
In the high-precision metering pump, the end part of the left push rod is provided with the left pressing block, the end part of the right push rod is provided with the right pressing block, the left pressing block and the right pressing block are respectively arranged on two opposite sides of the eccentric wheel and are in transmission connection with the eccentric wheel, and the left pressing block and the right pressing block are provided with arc pressing faces corresponding to the eccentric wheel.
The high-precision metering pump is characterized in that a movement channel for the movement of the left push rod and the right push rod is arranged in the pump body, the movement channel comprises a first section and a second section which are connected, the radial size of the second section is larger than that of the first section, and the second section is communicated with the left pump cavity or the right pump cavity.
The high-precision metering pump further comprises an elastic piece, wherein the elastic piece is arranged in the second section, and when the left push rod or the right push rod makes the liquid discharge movement stroke, the elastic piece is driven to stretch.
Foretell high accuracy measurement pump, left side diaphragm and right diaphragm all include diaphragm and connecting portion, the diaphragm is kept away from one side of left side pump chamber or right pump chamber is provided with circular connecting piece and annular connecting piece, circular connecting piece sets up the central point of diaphragm puts, annular connecting piece encircles circular connecting piece sets up, the one end of elastic component with annular connecting piece is connected.
In the high-precision metering pump, the circular connecting piece is connected with the left push rod or the right push rod through the connecting structure, and the connecting strip is arranged between the circular connecting piece and the annular connecting piece.
Foretell high accuracy measuring pump, inlet channel with still be provided with the feed liquor spare between left side pump chamber and the right pump chamber, be provided with the feed liquor chamber in the feed liquor spare, feed liquor chamber one end with inlet channel is linked together, the other end in feed liquor chamber be provided with the feed liquor portion that left side pump chamber or right pump chamber are linked together.
Foretell high accuracy measuring pump, feed liquor portion includes the edge feed liquor piece circumference interval in proper order has set up a plurality of feed liquor holes, the feed liquor hole with the deformation portion of left side diaphragm and right diaphragm corresponds the setting.
In the technical scheme, the utility model provides a high-precision metering pump, be provided with into liquid portion and play liquid portion on the pump body, be provided with drive arrangement in the pump body and be located the left cylinder body subassembly and the right cylinder body subassembly of the relative both sides of drive arrangement, the relative both sides that lie in drive arrangement in the pump body are provided with left pump chamber and right pump chamber respectively, eccentric wheel on the drive arrangement can drive left cylinder body subassembly and right cylinder body subassembly motion successively in same runner, make left diaphragm and right diaphragm carry out flowing back or imbibition in left pump chamber and right pump chamber respectively, left diaphragm and right diaphragm flowing back in turn, thereby when guaranteeing that the pump body has the high accuracy, promote the flow output range of metering pump, be applicable to different application scenarios.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, 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 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 driving device according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating an installation of a left diaphragm according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a liquid inlet hole provided by the embodiment of the present invention.
Description of reference numerals:
1. a pump body; 1.1, a liquid inlet part; 1.2, a liquid outlet part; 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 bank; 2. a drive device; 2.1, a driving shaft; 2.2, an eccentric wheel; 3. a left cylinder assembly; 3.1, a left push rod; 3.2, a left membrane; 4. a right cylinder block assembly; 4.1, a right push rod; 4.2, a right membrane; 5. a motion channel; 5.1, a first section; 5.2, a second section; 5.3, an elastic piece; 6. a circular connector; 6.1, annular connecting pieces; 6.2, connecting strips; 7. a liquid inlet part; 7.1 and a liquid inlet hole.
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. 1-5, an embodiment of the present invention provides a high precision metering pump, including a pump body 1, a liquid inlet portion 1.1 and a liquid outlet portion 1.2 are provided on the pump body 1, the pump further includes a driving device 2 provided in the pump body 1, and a left cylinder assembly 3 and a right cylinder assembly 4 located at two opposite sides of the driving device 2, a left pump cavity 1.3 and a right pump cavity 1.4 are respectively provided at two opposite sides of the driving device 2 in the pump body 1, a liquid inlet channel 1.5 and a liquid outlet channel 1.6 are respectively connected to the left pump cavity 1.3 and the right pump cavity 1.4, a liquid suction valve group 1.7 and a liquid discharge valve group 1.8 are respectively provided in the liquid inlet channel 1.5 and the liquid outlet channel 1.6; the driving device 2 comprises a driving unit and an eccentric wheel 2.2 connected with the driving unit, the left cylinder body assembly 3 comprises a left push rod 3.1 and a left diaphragm 3.2 arranged at the end part of the left push rod 3.1, the right cylinder body assembly 4 comprises a right push rod 4.1 and a right diaphragm 4.2 arranged at the end part of the right push rod 4.1, the left diaphragm 3.2 and the right diaphragm 4.2 are respectively positioned in the left pump cavity 1.3 and the right pump cavity 1.4, the left push rod 3.1 and the right push rod 4.1 are respectively positioned at two opposite sides of the eccentric wheel 2.2, and the eccentric wheel 2.2 rotates to correspondingly drive the left push rod 3.1 and the right push rod 4.1 to be sequentially staggered to be used as a liquid discharge movement stroke.
The liquid suction valve comprises a shell and a structure arranged inside the shell, a liquid inlet portion 1.1 and a liquid outlet portion 1.2 are respectively arranged at two opposite ends of the pump body 1, the liquid inlet portion 1.1 is used for conveying liquid to the inside of the pump body 1, the liquid outlet portion 1.2 is used for discharging liquid in the pump body 1, the liquid inlet portion 1.1 and the liquid outlet portion 1.2 are respectively arranged at the bottom and the top of the pump body 1, a left pump cavity 1.3 and a right pump cavity 1.4 are communicated with the liquid inlet portion 1.1 through a liquid inlet channel 1.5, the left pump cavity 1.3 and the right pump cavity 1.4 are communicated with the liquid outlet portion 1.2 through a liquid outlet channel 1.6, so that in the liquid conveying process, the liquid is conveyed to the liquid inlet portion 1.1.3 and the right pump cavity 1.4 through two liquid inlet channels 1.5 after being commonly used for conveying the liquid into the liquid inlet portion 1.1.1.3, the liquid outlet channel 1.5 and the liquid inlet channel 1.5 can be opened or closed along the liquid outlet channel 1.1.6, the liquid outlet channel 1.1.6 is closed or closed along the liquid outlet channel 1.1.6, and the liquid outlet channel 1.1.1.5, and the liquid outlet channel can be opened or closed along the liquid outlet channel 7.6, and the liquid outlet channel 1.1.1.6, and the liquid outlet channel can be opened or closed along the prior art, and liquid outlet valve set.
In this embodiment, a driving device 2, a left cylinder assembly 3 and a right cylinder assembly 4 are disposed inside the pump body 1, it should be noted that, the internal components of the pump body 1 are not limited to the driving device 2, the left cylinder assembly 3 and the right cylinder assembly 4, but 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, the driving device 2 includes a driving unit and a driving shaft 2.1, a speed changing assembly is further disposed between the driving unit and the driving shaft 2.1, the eccentric 2.2 is connected to the end of the driving shaft 2.1, the eccentric 2.2 can be driven to rotate by the driving unit, the speed changing assembly and the driving shaft 2.1, the left cylinder assembly 3 and the right cylinder assembly 4 have the same structure, the left cylinder assembly 3 includes a left push rod 3.1 and a left diaphragm 3.2, the right cylinder assembly 4 includes a right push rod 4.1 and a right diaphragm 4.2, the left push rod 3.1 is arranged along the direction vertical to the driving shaft 2.1, a motion channel 5 for the left push rod 3.1 to move is arranged in the pump body 1, the left push rod 3.1 is movably connected in the motion channel 5, the left diaphragm 3.2 is connected with one end of the left push rod 3.1, the left diaphragm 3.2 can be directly connected with the left push rod 3.1, the left diaphragm 3.2 can also be connected with the left push rod 3.1 through a connecting structure, the left diaphragm 3.2 is positioned in the left pump cavity 1.3, the other end of the left push rod 3.1 is arranged corresponding to the eccentric wheel 2.2, the end part of the left push rod 3.1 is positioned at one side of the eccentric wheel 2.2, the eccentric wheel 2.2 can correspondingly drive the left push rod 3.1 to move along the motion channel 5 when rotating, similarly, the right push rod 4.1 is arranged along the direction vertical to the driving shaft 2.1, a motion channel 5 for the right push rod 4.1 to move is arranged in the pump body 1, the right push rod 4.1 is movably connected in the motion channel 5, the right diaphragm 4.2 is movably connected with one end of the right push rod 4.1, the right diaphragm 4.2 can be directly connected with the right push rod 4.1, the right diaphragm 4.2 can also be connected with the right push rod 4.1 through a connecting structure, the right diaphragm 4.2 is positioned in the right pump cavity 1.4, the other end of the right push rod 4.1 is arranged corresponding to the eccentric wheel 2.2, the end part of the right push rod 4.1 is positioned at one side of the eccentric wheel 2.2, the right push rod 4.1 and the left push rod 3.1 are symmetrically arranged at two sides of the driving shaft 2.1, and the eccentric wheel 2.2 can correspondingly drive the right push rod 4.1 to move along the moving channel 5 when rotating.
In this embodiment, when the driving unit, the speed changing assembly and the driving shaft 2.1 are capable of driving the eccentric 2.2 to rotate, the eccentric 2.2 drives one of the left push rod 3.1 and the right push rod 4.1 to move along the moving channel 5 to perform a liquid discharging stroke, and the other one performs a liquid sucking stroke, for example, the eccentric 2.2 rotates to drive the left push rod 3.1 to move along the moving channel 5, the left diaphragm 3.2 is pushed to move into the left pump cavity 1.3, the liquid in the left pump cavity 1.3 is gradually pressurized, under the action of pressure, the liquid sucking valve group 1.7 is closed, the liquid discharging valve group 1.8 is opened, so as to discharge the liquid from the left pump cavity 1.3, in the liquid discharging stroke of the left push rod 3.1, along with the rotation of the eccentric 2.2, when the pushing force on the left push rod 3.1 disappears, the left push rod 3.1 is pushed to move in the direction opposite to the liquid discharging stroke along the moving channel 5 under the action of the elastic force or hydraulic force, thereby driving the left diaphragm 3.2 to move towards the direction far away from the left pump cavity 1.3, so as to generate negative pressure in the left pump cavity 1.3, sucking liquid pressure enables the liquid suction valve group 1.7 to be automatically opened, the liquid discharge valve group 1.8 is closed, liquid flows into the left pump cavity 1.3, when the left push rod 3.1 runs to a rear dead center, the liquid suction valve group 1.7 is automatically closed, so as to realize liquid discharge or liquid suction of the left pump cavity 1.3, the process is a liquid suction stroke of the left push rod 3.1, the liquid discharge and liquid suction processes of the right pump cavity 1.4 are the same as those of the left pump cavity 1.3, and are not repeated, it needs to be explained that when the eccentric wheel 2.2 is used for driving, the left push rod 3.1 and the left pump cavity 1.3 are used for liquid discharge stroke, the right push rod 4 is used for liquid suction stroke and the right pump cavity 1.4 is used for liquid discharge stroke, the left push rod 3.1 and the left pump cavity 1.3 are used for liquid discharge stroke, the eccentric wheel 2.2 rotates, correspondingly, and the left pump cavity 1.4 are sequentially staggered for one time, left pump chamber 1.3 and right pump chamber 1.4 imbibition and flowing back at every turn do not interfere with each other to ensure the high accuracy of the pump body, reduce the idle stroke of eccentric wheel 2.2 simultaneously, improve the operating efficiency of whole device, also promote the liquid volume of carrying at every turn.
The embodiment of the utility model provides a high-precision metering pump, be provided with into liquid portion 1.1 and play liquid portion 1.2 on the pump body 1, be provided with drive arrangement 2 in the pump body 1 and be located the left cylinder body subassembly 3 and the right cylinder body subassembly 4 of the relative both sides of drive arrangement 2, the relative both sides that lie in drive arrangement 2 in the pump body 1 are provided with left pump chamber 1.3 and right pump chamber 1.4 respectively, eccentric wheel 2.2 on the drive arrangement 2 can drive left cylinder body subassembly 3 and the motion of right cylinder body subassembly 4 successively in same rotation stroke, make left diaphragm 3.2 and right diaphragm 4.2 carry out flowing back or imbibition respectively in left pump chamber 1.3 and right pump chamber 1.4, left diaphragm 3.2 and right diaphragm 4.2 drain back in turn, thereby when guaranteeing that the pump body has the high accuracy, promote the flow output range of metering pump, be applicable to different application scenes.
In this embodiment, preferably, the end of the left push rod 3.1 is provided with a left pressing block, the end of the right push rod 4.1 is provided with a right pressing block, the left pressing block and the right pressing block are respectively arranged on two opposite sides of the eccentric wheel 2.2 and are in transmission connection with the eccentric wheel 2.2, and the left pressing block and the right pressing block are provided with arc-shaped pressing surfaces corresponding to the eccentric wheel 2.2; thereby make contact area increase between left briquetting and the eccentric wheel 2.2 through setting up the arc and supporting the pressure surface, eccentric wheel 2.2 is when rotating, and eccentric wheel 2.2 drives left push rod 3.1 and right push rod 4.1 through left briquetting or right briquetting.
In this embodiment, preferably, a movement channel 5 for the left push rod 3.1 or the right push rod 4.1 to move is arranged in the pump body 1, the movement channel 5 includes a first section 5.1 and a second section 5.2 which are connected, the radial size of the second section 5.2 is larger than that of the first section 5.1, and the second section 5.2 is communicated with the left pump cavity 1.3 or the right pump cavity 1.4; the motion channel 5 is perpendicular to a driving shaft 2.1 for driving the eccentric wheel 2.2 to rotate, a rotating cavity for the eccentric wheel 2.2 to rotate is arranged in the pump body 1, and one end of the first section 5.1, which is far away from the second section 5.2, is communicated with the rotating cavity.
In this embodiment, it is preferable that the liquid discharge device further includes an elastic member 5.3, which is disposed in the second section 5.2, and when the left push rod 3.1 or the right push rod 4.1 makes a liquid discharge movement stroke, the elastic member 5.3 is driven to stretch; one end of the elastic part 5.3 is fixedly connected with the inner wall of the second section 5.2 through a fixing part, the other end of the elastic part 5.3 is abutted against the diaphragm, the eccentric wheel 2.2 rotates to drive the left push rod 3.1 or the right push rod to move along the movement channel 5, and the left diaphragm 3.2 or the right diaphragm 4.2 is pushed to move towards the left pump cavity 1.3 or the right pump cavity 1.4, at the moment, the elastic part 5.3 is stretched to have elastic tension, along with the rotation of the eccentric wheel 2.2, after the pushing force on the left push rod 3.1 or the right push rod 4.1 disappears, under the action of the elastic force or the hydraulic force, the left push rod 3.1 or the right push rod 4.1 is pushed to move along the movement channel 5 in the direction opposite to the liquid discharge stroke, so as to drive the left diaphragm 3.2 to move in the direction far away from the left pump cavity 1.3.
In this embodiment, preferably, the left membrane 3.2 and the right membrane 4.2 both include a membrane and a connecting portion, the connecting portion is used for mounting the membrane, a circular connecting member 6 and an annular connecting member 6.1 are arranged on one side of the membrane away from the left pump cavity 1.3 or the right pump cavity 1.4, the circular connecting member 6 is arranged at the center of the membrane, the annular connecting member 6.1 is arranged around the circular connecting member 6, one end of the elastic member 5.3 is connected with the annular connecting member 6.1, the circular connecting member 6 is connected with the left push rod 3.1 or the right push rod 4.1 through a connecting structure, and a connecting strip 6.2 is arranged between the circular connecting member 6 and the annular connecting member 6.1; the left push rod 3.1 or the right push rod 4.1 pushes the left diaphragm 3.2 or the right diaphragm 4.2 to move through the circular connecting piece 6 and the annular connecting piece 6.1 in the liquid discharging stroke process, when the left push rod 3.1 or the right push rod 4.1 pulls the left diaphragm 3.2 or the right diaphragm 4.2 to move through the circular connecting piece 6 and the annular connecting piece 6.1 in the liquid sucking stroke process, the elastic piece 5.3 pulls the left diaphragm 3.2 or the right diaphragm 4.2 to move through the circular connecting piece 6 and the annular connecting piece 6.1, so that the stress area of the left diaphragm 3.2 and the right diaphragm 4.2 is increased, and the protection of the left diaphragm 3.2 and the right diaphragm 4.2 is realized.
In this embodiment, preferably, a liquid inlet member 7 is further disposed between the liquid inlet channel 1.5 and the left pump cavity 1.3 or the right pump cavity 1.4, a liquid inlet cavity is disposed in the liquid inlet member 7, one end of the liquid inlet cavity is communicated with the liquid inlet channel 1.5, the other end of the liquid inlet cavity is provided with a liquid inlet portion 1.1 communicated with the left pump cavity 1.3 or the right pump cavity 1.4, the liquid inlet portion 1.1 includes a plurality of liquid inlet holes 7.1 sequentially disposed at intervals along the circumferential direction of the liquid inlet member 7, and the liquid inlet holes 7.1 are disposed corresponding to deformation portions of the left diaphragm 3.2 or the right diaphragm 4.2; liquid inlet hole 7.1 sets up along the direction of the left diaphragm of perpendicular to 3.2 or right diaphragm 4.2, and liquid inlet hole 7.1 can be the round hole, and annular inlet channel 1.5 or arc inlet channel 1.5 also can be in the time of, so in the imbibition stroke, liquid passes through liquid inlet hole 7.1 along the deformation position jet liquid of the left diaphragm of perpendicular to 3.2 or right diaphragm 4.2, from the auxiliary force that provides a deformation for left diaphragm 3.2 or right diaphragm 4.2, strengthen the protection to left diaphragm 3.2 or right diaphragm 4.2.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, 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 (8)
1. A high-precision metering pump comprises a pump body, wherein a liquid inlet part and a liquid outlet part are arranged on the pump body, and the high-precision metering pump is characterized by further comprising a driving device arranged in the pump body, a left cylinder body assembly and a right cylinder body assembly, wherein the left cylinder body assembly and the right cylinder body assembly are positioned on two opposite sides of the driving device;
the driving device comprises a driving unit and an eccentric wheel connected with the driving unit, the left cylinder body assembly comprises a left push rod and a left diaphragm arranged at the end part of the left push rod, the right cylinder body assembly comprises a right push rod and a right diaphragm arranged at the end part of the right push rod, the left diaphragm and the right diaphragm are respectively positioned in the left pump cavity and the right pump cavity, the left push rod and the right push rod are respectively positioned at two opposite sides of the eccentric wheel, and the eccentric wheel rotates to correspondingly drive the left push rod and the right push rod to be sequentially staggered to form a liquid drainage stroke.
2. The high-precision metering pump according to claim 1, wherein a left pressing block is arranged at the end of the left push rod, a right pressing block is arranged at the end of the right push rod, the left pressing block and the right pressing block are respectively arranged at two opposite sides of the eccentric wheel and are in transmission connection with the eccentric wheel, and arc-shaped pressing surfaces corresponding to the eccentric wheel are arranged on the left pressing block and the right pressing block.
3. The high-precision metering pump according to claim 1, wherein a movement channel for the left push rod and the right push rod to move is arranged in the pump body, the movement channel comprises a first section and a second section which are connected, the radial dimension of the second section is larger than that of the first section, and the second section is communicated with the left pump cavity or the right pump cavity.
4. The high precision metering pump of claim 3, further comprising an elastic member disposed in the second section, the elastic member being driven to stretch when the left push rod or the right push rod makes the liquid discharge stroke.
5. The high-precision metering pump according to claim 4, wherein each of the left diaphragm and the right diaphragm comprises a diaphragm and a connecting portion, a circular connecting member and an annular connecting member are arranged on one side, away from the left pump cavity or the right pump cavity, of the diaphragm, the circular connecting member is arranged at the center of the diaphragm, the annular connecting member is arranged around the circular connecting member, and one end of the elastic member is connected with the annular connecting member.
6. The high-precision metering pump according to claim 5, wherein the circular connecting piece is connected with the left push rod or the right push rod through a connecting structure, and a connecting strip is arranged between the circular connecting piece and the annular connecting piece.
7. The high-precision metering pump according to claim 1, wherein a liquid inlet member is further arranged between the liquid inlet channel and the left pump cavity and the right pump cavity, a liquid inlet cavity is arranged in the liquid inlet member, one end of the liquid inlet cavity is communicated with the liquid inlet channel, and the other end of the liquid inlet cavity is provided with a liquid inlet part communicated with the left pump cavity or the right pump cavity.
8. The high-precision metering pump according to claim 7, wherein the liquid inlet portion comprises a plurality of liquid inlet holes which are sequentially arranged at intervals along the circumferential direction of the liquid inlet piece, and the liquid inlet holes are arranged corresponding to the deformation portions of the left diaphragm and the right diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222550241.6U CN218376824U (en) | 2022-09-23 | 2022-09-23 | High-precision metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222550241.6U CN218376824U (en) | 2022-09-23 | 2022-09-23 | High-precision metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218376824U true CN218376824U (en) | 2023-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222550241.6U Active CN218376824U (en) | 2022-09-23 | 2022-09-23 | High-precision metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218376824U (en) |
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2022
- 2022-09-23 CN CN202222550241.6U patent/CN218376824U/en active Active
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