CN107676250B - Reciprocating injection pump - Google Patents

Reciprocating injection pump Download PDF

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Publication number
CN107676250B
CN107676250B CN201711031566.0A CN201711031566A CN107676250B CN 107676250 B CN107676250 B CN 107676250B CN 201711031566 A CN201711031566 A CN 201711031566A CN 107676250 B CN107676250 B CN 107676250B
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CN
China
Prior art keywords
valve core
eccentric wheel
liquid
connecting rod
piston
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Application number
CN201711031566.0A
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CN107676250A (en
Inventor
任大鹏
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Nanjing Runze Fluid Control Equipment Co ltd
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Nanjing Runze Fluid Control Equipment Co ltd
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Priority to CN201711031566.0A priority Critical patent/CN107676250B/en
Publication of CN107676250A publication Critical patent/CN107676250A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention discloses a reciprocating injection pump, which is provided with a valve body, a liquid containing cavity, a piston and a driving system, and is characterized in that: the valve body is internally provided with a synchronous valve core, the synchronous valve core comprises a cylindrical valve core main body, two cut grooves are respectively arranged on two sides of the valve core main body in the radial direction, and the two cut grooves are staggered in the axial direction. The reciprocating injection pump of the invention alternately conducts the liquid inlet pipeline and the liquid outlet pipeline through the rotation of the valve core, and can realize continuous liquid inlet and liquid outlet by matching with synchronous piston movement, has high working efficiency and stable and pulsation-free work, and simultaneously has the advantages of novel structural design, reasonable planning, convenient operation and easy maintenance.

Description

Reciprocating injection pump
Technical Field
The invention relates to the technical field of chemical industry and machinery, in particular to fluid control equipment.
Background
The conventional syringe pump is composed of a stepping drive motor, a driver, a screw, a bracket, and the like, and has a screw and a nut that reciprocate, and is thus also called a screw pump. The traditional injection pump only has one inlet/outlet, so continuous liquid inlet and outlet cannot be realized, the injection pump capable of realizing continuous liquid inlet and outlet is provided with a separated liquid inlet and a separated liquid outlet, liquid outlet and liquid pumping are finished through electromagnetic valve or one-way valve control, but the electromagnetic valve needs to be independently controlled, so that the electromagnetic valve is difficult to accurately and effectively form synchronous control with the injection pump, and the one-way valve is opened or closed by self deformation, so that the service life and the limitation of applicable liquid are very large.
Disclosure of Invention
The technical purpose of the invention is to provide a novel injection pump, which adopts a novel design concept on the basis of realizing continuous liquid inlet and outlet control and can make up the defects of the prior art.
The technical scheme of the invention is as follows:
a reciprocating injection pump is provided with a valve body, a liquid containing cavity, a piston and a driving system, and is characterized in that:
the valve body is internally provided with a synchronous valve core, the synchronous valve core comprises a cylindrical valve core main body, two sides of the valve core main body in the radial direction are respectively provided with a notch groove, and the two notch grooves are staggered in the axial direction;
the valve body is provided with a first liquid inlet pipe and a first liquid outlet pipe which are connected with an external system, a second liquid inlet pipe and a second liquid outlet pipe which are communicated with the liquid containing cavity, the pipe orifice of the first liquid inlet pipe and the pipe orifice of the second liquid inlet pipe are adjacently arranged and correspond to the position of the first notch groove, the pipe orifice of the first liquid outlet pipe and the pipe orifice of the second liquid outlet pipe are adjacently arranged and correspond to the position of the second notch groove, the four pipe orifices are positioned on the same side of the radial direction of the valve core main body, and in the rotating process of the valve core main body, the first liquid inlet pipe, the second liquid inlet pipe and the first liquid outlet pipe are alternately conducted by the corresponding notch grooves;
the liquid containing cavity is arranged below the valve body, and the piston is arranged in the liquid containing cavity;
the driving system comprises a driving mechanism for controlling the piston to reciprocate up and down and a driving mechanism for controlling the valve core main body to rotate, one reciprocation period of the piston corresponds to one rotation period of the valve core main body, and when the piston moves downwards to a designated position, the first liquid inlet pipe and the second liquid inlet pipe are communicated; when the piston moves upwards to a designated position, the first liquid outlet pipe and the second liquid outlet pipe are communicated.
In addition to the above, a further improved or preferred embodiment further includes:
the notch depth of the notch groove (i.e., the height of the notch groove in the radial direction of the spool body) does not exceed the radius of the spool body.
The synchronous valve core is composed of a valve core main body and a valve core eccentric shaft, wherein the valve core eccentric shaft is parallel to the valve core main body, and the valve core eccentric shaft is eccentrically fixed at one end of the valve core main body. The driving system comprises a driving motor, an eccentric wheel is arranged on a rotating output shaft of the driving motor and is in transmission connection with a piston rod through an eccentric wheel connecting rod, the upper end of the eccentric wheel connecting rod is hinged with the piston rod through a shaft pin, the lower end of the eccentric wheel connecting rod is sleeved on an eccentric shaft of the eccentric wheel, and meanwhile, the eccentric shaft of the eccentric wheel is also connected with a valve core eccentric shaft through a synchronous connecting rod, so that the driving motor drives the piston to reciprocate up and down through the eccentric wheel and the eccentric wheel connecting rod and simultaneously pushes the synchronous valve core to rotate.
The device comprises a base body provided with an eccentric wheel and an eccentric wheel connecting rod, and a housing which is protected on the outer side of the synchronous connecting rod, wherein a tubular container provided with a liquid containing cavity is arranged on the base body, and the bottom end of a piston rod penetrates through a sealing structure at the bottom of the tubular container to extend into the base body and is connected with the eccentric wheel connecting rod; the valve body is arranged above the tubular container, the driving motor is arranged at the front side of the seat body, the synchronous connecting rod is arranged at the rear side outside the seat body, the valve core eccentric shaft is correspondingly arranged at the rear side of the valve core main body and is connected with the synchronous connecting rod, and the upper end and the lower end of the synchronous connecting rod are sleeved on the valve core eccentric shaft and the eccentric shaft of the eccentric wheel through bearings.
The top opening of the liquid containing cavity is closed by a sealing cover, the sealing cover is provided with a pipe diameter which is communicated with the second liquid inlet pipe, the second liquid outlet pipe and the liquid containing cavity, and the valve body is fixed on the sealing cover.
Be equipped with the code wheel on the eccentric wheel, the below of eccentric wheel is equipped with corresponding opto-coupler for gather driving motor's displacement angle, the switch-on state of feedback valve body inlet and outlet is convenient for manage and control.
The beneficial effects are that:
the reciprocating injection pump of the invention alternately conducts the liquid inlet pipeline and the liquid outlet pipeline through the rotation of the valve core, and is matched with the synchronous piston movement, so that continuous liquid inlet and liquid outlet can be realized, the working efficiency is high, the problem of short service life of the valve and the liquid types which are not applicable to the electromagnetic valve and the one-way valve, such as high-viscosity liquid, particle suspended liquid and the like, are effectively solved, the working is stable and has no pulsation, and meanwhile, the reciprocating injection pump of the invention has the advantages of novel structural design, reasonable planning, convenient use and easy maintenance.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a front view of an embodiment;
FIG. 3 is a cross-sectional view taken along the direction of example A-A;
FIG. 4 is a right side view of the embodiment;
FIG. 5 is a cross-sectional view in the direction of example C-C;
FIG. 6 is a left side view of an embodiment;
FIG. 7 is a cross-sectional view in the B-B direction;
fig. 8 is a schematic structural view of the valve body.
Detailed Description
In order to further clarify the technical scheme and working principle of the present invention, the present invention will be further described with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 7, a reciprocating injection pump comprises a valve body 1, a liquid containing cavity, a piston 4, a driving system and other components.
The valve body 1 is internally provided with a synchronous valve core 12 (synchronously reciprocating with the piston 4), the synchronous valve core 12 comprises a cylindrical valve core main body and a valve core eccentric shaft, the valve core eccentric shaft is parallel to but not coaxial with the valve core main body, and the valve core eccentric shaft is eccentrically fixed at one end of the valve core main body, as shown in figure 1.
The valve core main body is provided with a notch groove at two sides in the radial direction, as shown in fig. 5 and 8, the two notch grooves are completely staggered in the axial direction, and the notch depth of the notch groove does not exceed the radius of the valve core main body.
The valve body 1 is provided with a first liquid inlet pipe 14 and a first liquid outlet pipe 15 which are connected with an external system, a second liquid inlet pipe 13 and a second liquid outlet pipe 3 which are communicated with a liquid containing cavity, the pipe orifice of the first liquid inlet pipe 14 is arranged adjacent to the pipe orifice of the second liquid inlet pipe 13, the position of the first notch groove 12-1 is corresponding, the distance between the two pipe orifices is not more than the width of the first notch groove 12-1, the pipe orifice of the first liquid outlet pipe 15 is arranged adjacent to the pipe orifice of the second liquid outlet pipe 3, the position of the second notch groove 12-2 is corresponding, the distance between the two pipe orifices is not more than the width of the second notch groove 12-2, and the four pipe orifices are all arranged on the valve body below the valve core main body. The synchronous valve core is embedded in the valve body, and in the unidirectional rotation process of the valve core main body, the first liquid inlet pipe 14 and the second liquid inlet pipe 13, and the first liquid outlet pipe 15 and the second liquid outlet pipe 3 are alternately conducted by the corresponding notch grooves, or alternatively blocked by the non-notch groove parts of the valve core.
A tubular container provided with a liquid chamber in which the piston 4 is mounted is located below the valve body 1. The driving system comprises a driving mechanism for controlling the piston 4 to reciprocate up and down and a driving mechanism for controlling the valve core main body to rotate, when the piston 4 moves downwards to a limit position, the first liquid inlet pipe 14 and the second liquid inlet pipe 13 are completely communicated by the first notch groove 12-1, the first liquid outlet pipe 15 and the second liquid outlet pipe 3 are blocked, and liquid is fed into the liquid containing cavity; when the piston 4 moves upwards to the limit position, the first liquid outlet pipe 15 and the second liquid outlet pipe 3 are completely communicated by the second notch groove 12-2, the first liquid inlet pipe 14 and the second liquid inlet pipe 13 are blocked, and liquid in the liquid containing cavity is discharged.
The driving system comprises a driving motor 6, an eccentric wheel is arranged on a rotating output shaft of the driving motor 6 and is in transmission connection with a piston rod of a piston 4 through an eccentric wheel connecting rod 9, the upper end of the eccentric wheel connecting rod 9 is hinged with the piston rod through a shaft pin, the lower end of the eccentric wheel connecting rod is sleeved on an eccentric shaft of the eccentric wheel, and meanwhile, the eccentric shaft of the eccentric wheel is also connected with a valve core eccentric shaft through a synchronous connecting rod 10, so that the driving motor 6 drives the piston 4 to reciprocate up and down through the eccentric wheel and the eccentric wheel connecting rod 9 and simultaneously pushes a synchronous valve core 12 to rotate, and one reciprocation period of the piston 4 corresponds to one rotation period of a valve core main body.
The eccentric wheel and the eccentric wheel connecting rod 9 are arranged in a sealed seat, the tubular container is arranged at the top end of the seat, the top opening of the liquid containing cavity is closed by a sealing cover 2, the sealing cover 2 is provided with a pipe diameter which is communicated with a second liquid inlet pipe 13, a second liquid outlet pipe 3 and the liquid containing cavity, and the valve body 1 is fixed on the sealing cover 2. The bottom end of the piston rod penetrates through a sealing structure at the bottom of the tubular container and stretches into the seat body to be connected with the eccentric wheel connecting rod 9, the driving motor 6 is arranged at the front side of the seat body, the synchronous connecting rod 10 is arranged at the rear side outside the seat body, the valve core eccentric shaft is correspondingly arranged at the rear side of the valve core main body and is connected with the synchronous connecting rod 10, the upper end and the lower end of the synchronous connecting rod 10 are sleeved on the valve core eccentric shaft and the eccentric shaft of the eccentric wheel through bearings, and the outer side of the synchronous connecting rod 10 is provided with the housing 11.
In order to monitor the on-off state of the internal structure of the injection pump in real time, a coded disc 8 is arranged on the eccentric wheel, and a corresponding optocoupler 7 is arranged below the eccentric wheel and used for collecting the displacement angle of the driving motor 6 so as to feed back the on state of the liquid inlet and the liquid outlet of the valve body 1.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, the scope of which is defined in the appended claims, specification and their equivalents.

Claims (5)

1. A reciprocating injection pump is provided with a valve body (1), a liquid containing cavity, a piston (4) and a driving system, and is characterized in that:
a synchronous valve core (12) is arranged in the valve body (1), the synchronous valve core (12) comprises a cylindrical valve core main body and a valve core eccentric shaft, the valve core eccentric shaft is parallel to the valve core main body, and the valve core eccentric shaft is eccentrically fixed at one end of the valve core main body;
the valve core main body is provided with a notch groove at two sides of the radial direction respectively, and the two notch grooves are staggered in the axial direction;
the valve body (1) is provided with a first liquid inlet pipe (14) and a first liquid outlet pipe (15) which are connected with an external system, a second liquid inlet pipe (13) and a second liquid outlet pipe (3) which are communicated with a liquid containing cavity, the pipe orifice of the first liquid inlet pipe (14) is arranged adjacent to the pipe orifice of the second liquid inlet pipe (13) and corresponds to the position of a first notch groove (12-1), the pipe orifice of the first liquid outlet pipe (15) is arranged adjacent to the pipe orifice of the second liquid outlet pipe (3) and corresponds to the position of a second notch groove (12-2), and the four pipe orifices are positioned on the same side of the radial direction of the valve core main body, and in the rotating process of the valve core main body, the first liquid inlet pipe (14) and the second liquid inlet pipe (13), and the first liquid outlet pipe (15) and the second liquid outlet pipe (3) are alternately conducted by the corresponding notch grooves;
the liquid containing cavity is arranged below the valve body (1), and the piston (4) is arranged in the liquid containing cavity;
the driving system comprises a driving mechanism for controlling the piston (4) to reciprocate up and down and a driving mechanism for controlling the valve core main body to rotate, and specifically comprises the following components:
the driving system comprises a driving motor (6), an eccentric wheel is arranged on a rotating output shaft of the driving motor (6), the eccentric wheel is in transmission connection with a piston rod through an eccentric wheel connecting rod (9), the upper end of the eccentric wheel connecting rod (9) is hinged with the piston rod through a shaft pin, the lower end of the eccentric wheel connecting rod is sleeved on an eccentric shaft of the eccentric wheel, and meanwhile, the eccentric shaft of the eccentric wheel is also connected with a valve core eccentric shaft through a synchronous connecting rod (10), so that the driving motor (6) drives a piston (4) to reciprocate up and down through the eccentric wheel and the eccentric wheel connecting rod (9) and simultaneously pushes a synchronous valve core (12) to rotate;
one reciprocation period of the piston (4) corresponds to one rotation period of the valve core main body, and when the piston (4) moves downwards to a designated position, the first liquid inlet pipe (14) and the second liquid inlet pipe (13) are communicated; when the piston (4) moves upwards to a designated position, the first liquid outlet pipe (15) and the second liquid outlet pipe (3) are communicated.
2. The reciprocating syringe pump of claim 1, wherein the notch groove has a notch depth not exceeding a radius of the valve body.
3. A reciprocating injection pump according to claim 1, characterized in that a base for mounting the eccentric wheel and the eccentric wheel connecting rod (9) and a cover (11) for protecting the outer side of the synchronous connecting rod (10) are provided, a tubular container with a liquid containing cavity is mounted on the base, and the bottom end of the piston rod penetrates through a sealing structure at the bottom of the tubular container to extend into the base and is connected with the eccentric wheel connecting rod (9); the valve body (1) is arranged above the tubular container, the driving motor (6) is arranged at the front side of the seat body, the synchronous connecting rod (10) is arranged at the rear side outside the seat body, the valve core eccentric shaft is correspondingly arranged at the rear side of the valve core main body and is connected with the synchronous connecting rod (10), and the upper end and the lower end of the synchronous connecting rod (10) are sleeved on the valve core eccentric shaft and the eccentric shaft of the eccentric wheel through bearings.
4. A reciprocating syringe pump according to claim 3, characterized in that the top opening of the liquid containing cavity is closed by a sealing cover (2), the sealing cover (2) is provided with a pipe diameter for communicating the second liquid inlet pipe (13), the second liquid outlet pipe (3) and the liquid containing cavity, and the valve body (1) is fixed on the sealing cover (2).
5. A reciprocating injection pump according to any one of claims 1-4, characterized in that the eccentric wheel is provided with a code wheel (8), a corresponding optocoupler (7) is arranged below the eccentric wheel and used for collecting the displacement angle of the driving motor (6) and feeding back the conduction state of the inlet and outlet of the valve body (1).
CN201711031566.0A 2017-10-29 2017-10-29 Reciprocating injection pump Active CN107676250B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711031566.0A CN107676250B (en) 2017-10-29 2017-10-29 Reciprocating injection pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711031566.0A CN107676250B (en) 2017-10-29 2017-10-29 Reciprocating injection pump

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Publication Number Publication Date
CN107676250A CN107676250A (en) 2018-02-09
CN107676250B true CN107676250B (en) 2024-03-15

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108578835B (en) * 2018-05-03 2020-09-01 无锡市人民医院 Blood vessel embeds pipe thrombus and blocks up mediation nursing device that dissolves

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