CN210949012U

CN210949012U - Piston type metering pump

Info

Publication number: CN210949012U
Application number: CN201921976255.6U
Authority: CN
Inventors: 黄远飞
Original assignee: Dongguan Chuangying Machinery And Equipment Co ltd
Current assignee: Dongguan Chuangying Machinery And Equipment Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-07
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a piston type metering pump, which comprises a metering pump component electrically connected with an electric cabinet, wherein the metering pump component comprises a base, and a driving component, a piston component and a pump valve component which are in transmission connection are sequentially arranged on the base along the transverse direction; the pump valve assembly comprises a valve body seat with an inner cavity, a liquid inlet valve and a liquid outlet valve which are communicated with the inner cavity are fixedly arranged at the top end of the valve body seat, a liquid inlet connector connected with the liquid inlet valve and a liquid outlet connector connected with the liquid outlet valve are further arranged beside the valve body seat, the pump valve assembly further comprises a pump core inner shaft which can movably penetrate through a pump sleeve and vertically penetrate into/withdraw from the inner cavity of the valve body seat, the pump core inner shaft is in transmission connection with a piston shaft sleeved in a piston guide sleeve through a universal joint, the piston shaft is also in transmission connection with a driving assembly, the driving assembly drives the piston shaft to drive the pump core inner shaft to penetrate into/withdraw from the inner cavity, and liquid in the inner cavity is quantitatively discharged along a liquid outlet flow channel formed by the liquid outlet valve and the liquid outlet connector or external liquid is vacuum pumped into the inner cavity.

Description

Piston type metering pump

Technical Field

The utility model belongs to the technical field of measuring pump equipment and specifically relates to a piston measuring pump.

Background

The metering pump is widely applied to various fields of industrial production, such as petroleum, chemical industry, electric metallurgy, mines, shipbuilding, light industry, agriculture, civil use, national defense and the like. The method is particularly used for lithium battery electrolyte injection, liquid dispensing in the pharmaceutical industry, liquid injection filling, biochemical diagnostic reagent dispensing, electronic component dispensing, chemical engineering, cosmetic dispensing, spice and essence dispensing, liquid spraying, silicone oil spraying and the like.

However, the existing metering pump has the following defects: firstly, the existing electronic metering pump mainly adopts manual adjustment, when the liquid metering is adjusted, a fixed screw needs to be loosened manually, and then the base is stirred, so that the stroke of a telescopic shaft is changed for adjustment, and the defects of long adjustment time, repeated adjustment, large accuracy error and the like are caused; secondly, the existing pneumatic metering pump mainly adopts manual adjustment, and the pneumatic limit stroke needs to be manually adjusted when the liquid metering is adjusted, so that the moving range of the telescopic shaft is changed, the repeated precision of the metering pump is influenced due to slight change of air pressure, the single high-precision requirement cannot be met due to manual limit adjustment, and the adjustment time is wasted; thirdly, although the existing automatic metering pump belongs to the automatic regulation liquid metering, the precision error is too large, the high precision requirement cannot be achieved, and the application range of the automatic metering pump is too narrow, so that the universal requirement of multiple industries cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to the problem among the above-mentioned prior art, provide a piston measuring pump that the structure is retrencied, the regulation is convenient, corrosion-resistant, application scope is wide.

In order to solve the technical problem, the utility model adopts the following technical scheme that the piston type metering pump comprises a metering pump component which is electrically connected with an electric cabinet, wherein the metering pump component comprises a base, and a driving component, a piston component and a pump valve component which are in transmission connection are sequentially arranged on the base along the transverse direction; the pump valve assembly comprises a valve body seat with an inner cavity, a liquid inlet valve and a liquid outlet valve which are communicated with the inner cavity are fixedly arranged at the top end of the valve body seat, a liquid inlet connector connected with the liquid inlet valve and a liquid outlet connector connected with the liquid outlet valve are further arranged beside the valve body seat, the pump valve assembly further comprises a pump core inner shaft which can movably penetrate through a pump sleeve and vertically penetrate into/withdraw from the inner cavity of the valve body seat, the pump core inner shaft is in transmission connection with a piston shaft sleeved in a piston guide sleeve through a universal joint, the piston shaft is further in transmission connection with a driving assembly, the driving assembly drives the piston shaft to drive the pump core inner shaft to penetrate into/withdraw from the inner cavity, and liquid in the inner cavity is quantitatively discharged along a liquid outlet flow channel formed by the liquid outlet valve and the liquid outlet connector or the external liquid is vacuum pumped into the inner cavity along a liquid inlet flow channel formed by the liquid.

As a further elaboration of the above technical solution:

in the above technical solution, the valve body seat is provided with a liquid inlet main flow passage, a liquid outlet main flow passage, a liquid inlet passage and a liquid outlet passage, the liquid inlet valve is communicated with the liquid inlet main flow passage and the liquid inlet passage, the liquid outlet valve is communicated with the liquid outlet main flow passage and the liquid outlet passage, and the liquid inlet main flow passage and the liquid outlet main flow passage are both communicated with the inner cavity; when the metering pump assembly works, external liquid can be sucked into the inner cavity along the liquid inlet joint, the liquid inlet channel, the liquid inlet valve and the liquid inlet main channel in a vacuum manner, or the liquid arranged in the inner cavity is quantitatively discharged along the liquid outlet main channel, the liquid outlet valve, the liquid outlet channel and the liquid outlet joint.

In the technical scheme, the driving assembly comprises a driving motor mounting seat fixedly arranged on a base, a driving motor transversely arranged is arranged on the driving motor mounting seat, a driving shaft of the driving motor is a ball screw driving shaft, a screw nut of the ball screw driving shaft is provided with a rear push block, the rear push block is also connected with the piston shaft, and one axial end of a screw rod of the ball screw driving shaft is movably arranged in a shaft hole of the piston shaft in a penetrating manner; the driving motor drives the screw rod nut to drive the rear push block and the piston shaft to move along the transverse direction, and the inner shaft of the pump core is driven to penetrate into/withdraw from the inner cavity in a matching mode.

In the above technical scheme, the piston guide sleeve is nested in a piston fixing seat fixedly arranged on the base, a plurality of guide grooves extending transversely are formed in the circumferential side wall of the piston guide sleeve, a limiting block is arranged on the position, matched with each guide groove, on the circumferential side wall of the piston shaft, the limiting block is embedded in the guide grooves and used for limiting the stroke of the piston shaft moving transversely, and a photoelectric detection sensor used for detecting the initial position of the piston shaft is further arranged on the piston fixing seat.

In the technical scheme, the two transverse ends of the pump sleeve are respectively provided with a sealing ring which enables the pump sleeve to be connected with the piston fixing seat and the valve body seat in a sealing mode.

In the above technical solution, the pump core inner shaft includes an integrally formed pump core main body and a pump head, and the pump head is used for movably penetrating into/withdrawing from the inner cavity to quantitatively discharge the liquid in the inner cavity or suck the external liquid into the inner cavity.

In the above technical scheme, be equipped with the first sealing washer that is used for making pump head and pump housing sealing connection on the pump head.

In the above technical scheme, the seal ring and the first seal ring are both O-shaped seal rings, the pump core inner shaft is a ceramic inner shaft, and the pump sleeve is a ceramic pump sleeve.

The utility model has the advantages that firstly, the utility model has novel structure, strong flexibility and wide application range; secondly, the torque function of the driving component of the utility model is fully applied on the screw rod, thereby reducing the transmission error, reducing the repeated error and improving the metering precision; thirdly, the utility model adopts a soft sealing ring with large wire diameter at the sealing position, which can realize high vacuum liquid pumping and less leakage; fourthly, the metering pump of the utility model has strong corrosion resistance; fifthly, the utility model has novel and unique overall appearance and reasonable structure, each mechanism inside the utility model is connected with each other and has independent property, the replacement and the maintenance are easy, the continuous operation production can be carried out for a long time, and the consistency and the qualification rate of products are ensured; sixthly, the utility model discloses a measuring pump uniformity is high.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a schematic illustration of the metering pump assembly of the present invention with the housing removed;

FIG. 3 is an exploded view of the metering pump assembly of the present invention;

fig. 4 is a cross-sectional view of the metering pump of the present invention;

FIG. 5 is an exploded view of the pump valve assembly of the present invention;

fig. 6 is a sectional view of the assembled valve seat, liquid inlet valve, liquid outlet valve, liquid inlet joint and liquid outlet joint of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Fig. 1-6 illustrate a specific embodiment of a piston-type metering pump according to the present invention. Referring to fig. 1-6, a piston type metering pump comprises a metering pump assembly 200 electrically connected with an electric cabinet 100, wherein the electric cabinet 100 is connected with a photoelectric sensor, a motor and the like of the metering pump assembly 200 through an aviation plug, a USB data line, a power line and the like, and the electric cabinet 100 is used for intelligently controlling and intelligently displaying the liquid inlet and outlet amount of the metering pump; the metering pump assembly 200 comprises a base 1, and a driving assembly 2, a piston assembly 3 and a pump valve assembly 4 which are in transmission connection are sequentially arranged on the base 1 along the transverse direction; the pump-valve assembly 4 includes a valve body base 41 having an inner cavity 411, the top end of the valve body base 41 is fixedly provided with a liquid inlet valve 42 and a liquid outlet valve 43 which are electrically connected to the inner cavity 411, in this embodiment, the liquid inlet valve 42 and the liquid outlet valve 43 are both electromagnetic valves which are electrically connected to the electric cabinet 200, the valve body base 41 is further provided with a liquid inlet connector 44 connected to the liquid inlet valve 42 and a liquid outlet connector 45 connected to the liquid outlet valve 43 at a side thereof, the pump-valve assembly 4 further includes a pump core inner shaft 47 which can movably penetrate through a pump sleeve 46 and vertically penetrate/withdraw from the inner cavity 411 of the valve body base 41, the pump core inner shaft 47 is in transmission connection with a piston shaft 32 which is sleeved in the piston guide sleeve 31 through a universal joint 48, the piston shaft 32 is also in transmission connection with a driving assembly 2, the driving assembly 32 drives the pump core inner shaft 47 to penetrate/withdraw from the inner cavity 411, and liquid in the inner cavity 411 is quantitatively discharged or external liquid is quantitatively discharged along a liquid outlet channel which is composed of the The liquid is pumped to the inner cavity 411 along a liquid inlet flow passage formed by a liquid inlet joint 44 and a liquid inlet valve 42 in a vacuum manner; in this embodiment, the valve body seat 41 is formed with a main liquid inlet channel 412, a main liquid outlet channel 413, a liquid inlet channel 414 and a liquid outlet channel 415, the liquid inlet valve 42 is communicated with the main liquid inlet channel 412 and the liquid inlet channel 414, the liquid outlet valve 43 is communicated with the main liquid outlet channel 413 and the liquid outlet channel 415, and both the main liquid inlet channel 412 and the main liquid outlet channel 413 are communicated with the inner cavity 411; when the metering pump assembly 200 works, the liquid inlet valve 42 is opened, the driving assembly 2 drives the pump core inner shaft 47 to transversely move away from the inner cavity 411 through the piston assembly 3, so that the inner cavity 411 forms a vacuum suction cavity, and external liquid is sucked into the inner cavity 411 and stored along the liquid inlet joint 44, the liquid inlet channel 414, the liquid inlet valve 42 and the liquid inlet main channel 412; on the other hand, when discharging, the liquid outlet valve 43 is opened, the driving assembly 2 drives the pump core inner shaft 47 to move towards the inner cavity 411, so that the inner cavity 411 forms a matched pressure space and liquid in the inner cavity 411 is quantitatively discharged along the liquid outlet main flow passage 413, the liquid outlet valve 43, the liquid outlet passage 415 and the liquid outlet joint 45.

Referring to fig. 1-6, in this embodiment, the driving assembly 2 includes a driving motor mounting base 21 fixedly disposed on the base 1, a driving motor 22 transversely disposed is disposed on the driving motor mounting base 21, a driving shaft of the driving motor 22 is a ball screw driving shaft 221, a screw nut 222 of the ball screw driving shaft 221 is provided with a back push block 23, the back push block 23 is further connected to the piston shaft 32, and an axial end of a screw 223 of the ball screw driving shaft 221 movably penetrates through a shaft hole of the piston shaft 32; the driving motor 22 drives the feed screw nut 222 to drive the rear push block 23 and the piston shaft 32 to move along the transverse direction, and the pump core inner shaft 47 is driven to penetrate into/exit from the inner cavity 411 in a matching manner.

Referring to fig. 1-6, in this embodiment, the piston guide sleeve 31 is nested in a piston fixing seat 33 fixedly disposed on the base 1, a plurality of guide slots 311 extending in a transverse direction are formed on a circumferential side wall of the piston guide sleeve 31, in this embodiment, two guide slots 311 having an interval radian of 90 ° are formed on the circumferential side wall of the piston guide sleeve 31, a position on an outer circumferential side wall of the piston shaft 32 matching each guide slot 311 is provided with a stopper 34, and the stopper 34 is nested in the guide slots 311 and is used for limiting a stroke of the piston shaft 32 moving in the transverse direction; the piston fixing seat 33 is also provided with a photoelectric detection sensor 35 for detecting the transverse movement starting position of the piston shaft 32; in practice, when the piston shaft 32 moves laterally, the stopper 34 moves laterally along with the piston shaft 32 and drives the stopper 34 to move in the guide slot 311, when the stopper 34 is stopped by contacting with the two lateral sides of the guide slot 311, it indicates that the piston shaft 32 moves in place laterally, and during the lateral movement of the piston shaft 32, the initial position of the movement of the piston shaft 32 is detected by the photoelectric detection sensor 35.

Referring to fig. 1-6, in the present embodiment, both ends of the pump sleeve 46 in the transverse direction are respectively provided with a sealing ring 49 for hermetically connecting the pump sleeve 46 with the piston fixing seat 33 and the valve body seat 41; the pump core inner shaft 47 comprises a pump core main body 471 and a pump head 472 which are integrally formed, the pump head 472 is used for movably penetrating into/withdrawing from the inner cavity 411 so as to quantitatively discharge the liquid in the inner cavity 411 or suck the external liquid into the inner cavity 411, in this embodiment, a first sealing ring 473 used for sealing and connecting the pump head 472 with the pump sleeve 46 is arranged on the pump head 472; in this embodiment, the seal ring 49 and the first seal ring 473 are both O-ring seals, the pump core inner shaft 47 is a cobalt oxide ceramic inner shaft, and the pump sleeve 46 is a ceramic pump sleeve.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A piston type metering pump comprises a metering pump assembly electrically connected with an electric cabinet, and is characterized in that the metering pump assembly comprises a base, and a driving assembly, a piston assembly and a pump valve assembly which are in transmission connection are sequentially arranged on the base along the transverse direction; the pump valve assembly comprises a valve body seat with an inner cavity, a liquid inlet valve and a liquid outlet valve which are communicated with the inner cavity are fixedly arranged at the top end of the valve body seat, a liquid inlet connector connected with the liquid inlet valve and a liquid outlet connector connected with the liquid outlet valve are further arranged beside the valve body seat, the pump valve assembly further comprises a pump core inner shaft which can movably penetrate through a pump sleeve and vertically penetrate into/withdraw from the inner cavity of the valve body seat, the pump core inner shaft is in transmission connection with a piston shaft sleeved in a piston guide sleeve through a universal joint, the piston shaft is further in transmission connection with a driving assembly, the driving assembly drives the piston shaft to drive the pump core inner shaft to penetrate into/withdraw from the inner cavity, and liquid in the inner cavity is quantitatively discharged along a liquid outlet flow channel formed by the liquid outlet valve and the liquid outlet connector or the external liquid is vacuum pumped into the inner cavity along a liquid inlet flow channel formed by the liquid.

2. A piston metering pump according to claim 1, wherein the valve body seat is formed with a main liquid inlet channel, a main liquid outlet channel, a liquid inlet channel and a liquid outlet channel, the liquid inlet valve communicates with the main liquid inlet channel and the liquid inlet channel, the liquid outlet valve communicates with the main liquid outlet channel and the liquid outlet channel, and the main liquid inlet channel and the main liquid outlet channel communicate with the inner cavity; when the metering pump assembly works, external liquid can be sucked into the inner cavity along the liquid inlet joint, the liquid inlet channel, the liquid inlet valve and the liquid inlet main channel in a vacuum manner, or the liquid arranged in the inner cavity is quantitatively discharged along the liquid outlet main channel, the liquid outlet valve, the liquid outlet channel and the liquid outlet joint.

3. A piston metering pump according to claim 1, wherein the driving assembly comprises a driving motor mounting seat fixedly arranged on the base, a driving motor transversely installed is arranged on the driving motor mounting seat, a driving shaft of the driving motor is a ball screw driving shaft, a screw nut of the ball screw driving shaft is provided with a back push block, the back push block is further connected with the piston shaft, and one axial end of a screw of the ball screw driving shaft is movably arranged in a shaft hole of the piston shaft; the driving motor drives the screw rod nut to drive the rear push block and the piston shaft to move along the transverse direction, and the inner shaft of the pump core is driven to penetrate into/withdraw from the inner cavity in a matching mode.

4. A piston-type metering pump as set forth in claim 2, wherein the piston guide is nested in a piston fixing seat fixed on the base, a plurality of guide grooves extending in the transverse direction are formed on the circumferential side wall of the piston guide, a limit block is disposed on the circumferential side wall of the piston shaft at a position matching each guide groove, the limit block is embedded in the guide grooves and used for limiting the stroke of the piston shaft in the transverse direction, and a photoelectric detection sensor for detecting the initial position of the piston shaft is further disposed on the piston fixing seat.

5. A piston-type metering pump according to claim 4, wherein both ends of the pump sleeve in the transverse direction are respectively provided with a sealing ring for hermetically connecting the pump sleeve with the piston fixing seat and the valve body seat.

6. A piston metering pump as claimed in claim 5, wherein said pump core inner shaft comprises an integrally formed pump core body and a pump head for moving into/out of said internal chamber to meter liquid out of said internal chamber or to pump external liquid into the internal chamber.

7. A piston-type metering pump according to claim 6, wherein a first seal ring is provided on the pump head for sealingly connecting the pump head to the pump housing.

8. A piston metering pump according to claim 7, wherein the sealing ring and the first sealing ring are both O-rings, the pump core inner shaft is a ceramic inner shaft, and the pump sleeve is a ceramic pump sleeve.