CN108457842B

CN108457842B - Medical composite plunger pump

Info

Publication number: CN108457842B
Application number: CN201810505167.1A
Authority: CN
Inventors: 刘兴德; 徐茂睿
Original assignee: Jilin Institute of Chemical Technology
Current assignee: Jilin Institute of Chemical Technology
Priority date: 2018-05-24
Filing date: 2018-05-24
Publication date: 2023-06-23
Anticipated expiration: 2038-05-24
Also published as: CN108457842A

Abstract

The invention discloses the technical field of medical composite plunger pumps, in particular to a medical composite plunger pump. The motor seat comprises a motor seat surface I and a motor seat surface II, wherein the motor seat surface I and the motor seat surface II are connected in a right angle manner and are in an angle iron shape; a round hole is formed in one surface of the first motor seat surface, a rotor output shaft of the micro motor penetrates through the round hole of the first motor seat surface, the micro motor is fixed on the first motor seat surface through a second screw, the second motor seat surface is fixed with a main connecting plate through the first screw, and a main connecting sleeve is arranged at the lower end of the main connecting plate. The invention has compact structure, is simple and light, is easy to disassemble and install and is convenient to maintain; the two working modes of pressurization and pressure relief can be realized, and the switching is convenient; the working is stable and reliable, the efficiency is high, and the failure rate is small.

Description

Medical composite plunger pump

Technical Field

The invention relates to the technical field of medical composite plunger pumps, in particular to a medical composite plunger pump.

Background

Many devices require both positive and negative pressure actuation, especially those with positive and negative pressure actuation more commonly found in the medical device industry. The number of pumps required is large for both air and vacuum pumps, and two circuits are required for both pneumatic and vacuum. In order to realize pneumatic pressurization or vacuumizing to form negative pressure, more equipment is needed, the structure is complex, the installation and maintenance are inconvenient, and the stability is poor.

Disclosure of Invention

In order to overcome the defects, the invention provides the compound plunger pump which is small in size, stable in operation, high in efficiency and simple in structure. The invention provides power for medical instruments and other devices requiring positive and negative pressure.

The technical scheme adopted by the invention is as follows:

the medical compound plunger pump comprises a miniature motor and a motor seat, wherein the two surfaces of the motor seat are a motor seat surface I and a motor seat surface II respectively, and the motor seat surface I and the motor seat surface II are connected in a right angle manner and are in an angle iron shape; a round hole is formed in one surface of the first motor seat surface, a rotor output shaft of the micro motor penetrates through the round hole of the first motor seat surface, the micro motor is fixed on the first motor seat surface through a second screw, the second motor seat surface is fixed with a main connecting plate through the first screw, and a main connecting sleeve is arranged at the lower end of the main connecting plate; one end of the eccentric shaft is sleeved on the rotor output shaft, and the eccentric shaft is fixedly connected with the rotor output shaft through a pin I; the bearing is sleeved at the other end of the eccentric shaft, a spacer ring is arranged in the bearing and sleeved at the other end of the eccentric shaft, the outer ring of the bearing is arranged inside one end of the connecting rod and is movably connected with the connecting rod, the other end of the eccentric shaft penetrates out of one end of the connecting rod, and an opening retainer ring is sleeved on the edge of the eccentric shaft penetrating out of the connecting rod and is in contact with the connecting rod; the other end of the connecting rod is provided with a U-shaped structure, one end of the piston is provided with a piston rod, the piston rod is arranged in the U-shaped structure of the connecting rod, the second pin penetrates through the U-shaped structure of the connecting rod and one end of the piston rod in the U-shaped structure, and the piston rod is movably connected with the U-shaped structure of the connecting rod through the second pin; the middle part of the piston is sleeved with a sealing ring, the guide strip is sleeved at the edges of the two ends close to the piston rod, and the piston is arranged in one end of the cylinder barrel and can move in the cylinder barrel; the other end of the cylinder barrel is sleeved with a main connecting sleeve, the cylinder barrel is fixedly connected with the main connecting sleeve through threaded fit, and a sealing gasket is arranged between the other end of the cylinder barrel and the main connecting sleeve; the main connecting sleeve and the main connecting plate are of an integrated structure, the main connecting sleeve is connected with the middle connecting plate, a sealing gasket is arranged between the main connecting sleeve and the middle connecting plate, a first check valve and a second check valve are arranged in the middle connecting plate, the middle connecting plate is connected with the air tap seat, a separation seal is arranged between the middle connecting plate and the air tap seat, and the air tap seat is provided with an air tap I and an air tap II; the central line of the first air tap is consistent with the central line of the first check valve, and the central line of the second air tap is consistent with the central line of the second check valve; the air tap seat is provided with a second screw, the second screw penetrates through the air tap seat, the middle connecting plate and the main connecting sleeve, and the second screw enables the air tap seat, the middle connecting plate and the main connecting sleeve to be fixedly connected together; one end of the air tap communicating pipe II is communicated with one end of the air tap communicating pipe I, the other end of the pipe I is communicated with the P hole of the two-position five-way electromagnetic valve, one end of the pipe II extends to form two pipes, and the two pipes are respectively communicated with the T1 hole and the T2 hole of the two-position five-way electromagnetic valve.

The miniature motor is wrapped with cooling material.

The beneficial effects of the invention are as follows: the structure is compact, simple and light, easy to detach and install and convenient to maintain; the two working modes of pressurization and pressure relief can be realized, and the switching is convenient; the working is stable and reliable, the efficiency is high, and the failure rate is small.

Drawings

Fig. 1 is a front cross-sectional view of the present invention.

Fig. 2 is a top view of the structure of the present invention.

In the figure: 1. pin one, 2, eccentric shaft, 3, connecting rod, 4, bearing, 5, spacer ring, 6, split washer, 7, cylinder barrel, 8, pin two, 9, piston rod, 10, main connecting plate, 10, main connecting sleeve, 101, main connecting sleeve, 11, screw one, 121, air tap one, 122, air tap two, 13, air tap seat, 141, one-way valve one, 142, one-way valve two, 15, sealing gasket, 16, guide strip, 17, sealing ring, 181, motor seat face one, 182, motor seat face two, 19, screw two, 20, intermediate connecting plate, 21, spacer seal 22, screw two, 23, micro motor, 24, rotor output shaft, 25, piston, 26, coil one, 27, valve core 28, valve body 29, coil two, 30, five-way solenoid valve 301, conduit one, 302.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-2: the medical compound plunger pump comprises a miniature motor 23 and a motor seat, wherein the two surfaces of the motor seat are a first motor seat surface 181 and a second motor seat surface 182 respectively, and the first motor seat surface 181 and the second motor seat surface 182 are connected in a right angle manner and are in an angle iron shape; a round hole is formed in one surface of the first motor seat surface 181, a rotor output shaft 24 of the micro motor 23 penetrates through the round hole of the first motor seat surface 181, the micro motor 23 is fixed on the first motor seat surface 181 through a second screw 19, the second motor seat surface 182 is fixed with the main connecting plate 10 through a first screw 11, and a main connecting sleeve 101 is arranged at the lower end of the main connecting plate 10; one end of the eccentric shaft 2 is sleeved on the rotor output shaft 24, and the eccentric shaft 2 is fixedly connected with the rotor output shaft 24 through a pin 1; the bearing 4 is sleeved at the other end of the eccentric shaft 2, a spacer ring 5 is arranged in the bearing 4, the spacer ring 5 is sleeved at the other end of the eccentric shaft 2, the outer ring of the bearing 4 is arranged inside one end of the connecting rod 3, the outer ring of the bearing 4 is movably connected with the connecting rod 3, the other end of the eccentric shaft 2 penetrates out of one end of the connecting rod 3, an opening retainer ring 6 is sleeved on the edge of the eccentric shaft 2 penetrating out of the connecting rod 3, and the retainer ring 6 is in contact with the connecting rod 3; the other end of the connecting rod 3 is provided with a U-shaped structure, one end of the piston 25 is provided with a piston rod 9, the piston rod 9 is arranged in the U-shaped structure of the connecting rod 3, the second pin 8 penetrates through the U-shaped structure of the connecting rod 3 and one end of the piston rod 9 in the U-shaped structure, and the piston rod 9 is movably connected with the U-shaped structure of the connecting rod 3 through the second pin 8; the upper middle part of the piston 25 is sleeved with a sealing ring 17, the guide strip 16 is sleeved on the edges of two ends close to the piston rod 9, and the piston 25 is arranged in one end of the cylinder 7 and can move in the cylinder 7; the other end of the cylinder barrel 7 is sleeved with a main connecting sleeve 101, the cylinder barrel 7 is fixedly connected with the main connecting sleeve 10 through threaded fit, and a sealing gasket 15 is arranged between the other end of the cylinder barrel 7 and the main connecting sleeve 101; the main connecting sleeve 101 and the main connecting plate 10 are of an integrated structure, the main connecting sleeve 101 is connected with the middle connecting plate 20, a sealing gasket is arranged between the main connecting sleeve 101 and the middle connecting plate 20, a first check valve 141 and a second check valve 142 are arranged in the middle connecting plate 20, the middle connecting plate 20 is connected with the air tap seat 13, a separation seal 21 is arranged between the middle connecting plate 20 and the air tap seat 13, and the air tap seat 13 is provided with an air tap first 121 and an air tap second 122; the center line of the first air tap 121 is consistent with the center line of the first check valve 141, and the center line of the second air tap 122 is consistent with the center line of the second check valve 142; the air tap seat 13 is provided with a second screw 22, the second screw 22 penetrates through the air tap seat 13, the middle connecting plate 20 and the main connecting sleeve 101, and the second screw 22 enables the air tap seat 13, the middle connecting plate 20 and the main connecting sleeve 101 to be fixedly connected together; one end of the air tap I121 is communicated with one end of the pipeline II 302, the air tap II 122 is communicated with one end of the pipeline I301, the other end of the pipeline I301 is communicated with the P hole of the two-position five-way electromagnetic valve 30, one end of the pipeline II 302 extends to form two pipelines, and the two pipelines are respectively communicated with the T1 hole and the T2 hole of the two-position five-way electromagnetic valve 30.

The micro motor 23 is wrapped with a cooling material. In order to prevent the motor from heating during long-time use, the miniature motor 23 is wrapped with a cooling material, the cooling material is not marked in the drawing of the specification, and the miniature motor 23 can be wrapped with a protective sleeve by using the cooling material.

As shown in fig. 2:

when the medical compound plunger pump vacuumizes external equipment, the two-position five-way electromagnetic valve 30 comprises a valve core 27 and a valve body 28 working interface A. When the upper coil 26 of the electromagnetic valve 30 is electrified, the valve core 27 of the two-position five-way electromagnetic valve 30 is positioned at the upper position, the port T1 of the two-position five-way electromagnetic valve 30 is communicated with the port B, the port P is communicated with the port A and is in an open state, the port T2 is in a closed state, the micro motor 23 is electrified and started, and the rotor output shaft 24 of the micro motor 23 is movably connected with the eccentric shaft 2 to transmit power to the connecting rod 3 so as to drive the piston 25 to move left and right. When the piston 25 moves leftwards, air enters the air cylinder 7 through the port A of the two-position five-way electromagnetic valve 30, passes through the port P and is output by the port P, enters the air inlet one-way valve 142 through the air tap I122, reaches the maximum internal volume of the air cylinder 7 when the piston 25 moves to the left limit position, the rotor output shaft 24 rotates and drives the piston 25 to move rightwards through the eccentric shaft 2, the internal volume of the air cylinder 7 is reduced, air passes through the air outlet one-way valve 141, passes through the air tap 121, enters the port T1 of the two-position five-way electromagnetic valve 30, and is discharged outwards through the port B of the two-position five-way electromagnetic valve 30, so that the aim of vacuumizing a working device is achieved.

When the medical compound plunger pump pressurizes external equipment, the lower coil II 29 of the two-position five-way electromagnetic valve 30 is electrified, the valve core 27 of the electromagnetic valve is positioned at the lower position, the P port and the B port of the two-position five-way electromagnetic valve 30 are communicated, the T2 port and the A port are both in an open state, the T1 port is in a closed state, the micro motor 23 is electrified and started, and the power is transmitted to the connecting rod 3 through the connection of the motor rotor output shaft 24 and the eccentric shaft 2, so that the piston 25 is driven to move left and right. When the piston 25 moves leftwards, the external air is sent to the port P through the port B of the two-position five-way electromagnetic valve 30 and enters the cylinder 7 through the air inlet nozzle 122 and the air inlet one-way valve 142; when the piston 25 moves to the left limit position, the inner volume of the cylinder barrel 7 reaches the maximum, the rotor output shaft 24 rotates and drives the piston 25 to move rightwards through the eccentric shaft 2, the inner volume of the cylinder barrel 7 is reduced, gas in the cylinder barrel is fed outwards through the gas outlet one-way valve 141 and the gas outlet nozzle 121, enters the T2 port of the two-position five-way electromagnetic valve 30, and is inflated into the working device through the A port, so that the aim of pressurizing the working device is achieved.

In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Medical compound plunger pump, including miniature motor (23) and motor cabinet, its characterized in that: the two surfaces of the motor seat are a motor seat surface I (181) and a motor seat surface II (182) respectively, and the motor seat surface I (181) and the motor seat surface II (182) are connected in a right angle manner and are in an angle iron shape; a round hole is formed in one surface of the first motor seat surface (181), a rotor output shaft (24) of the micro motor (23) penetrates through the round hole of the first motor seat surface (181), the micro motor (23) is fixed on the first motor seat surface (181) through a second screw (19), the second motor seat surface (182) is fixed with the main connecting plate (10) through a first screw (11), and a main connecting sleeve (101) is arranged at the lower end of the main connecting plate (10); one end of the eccentric shaft (2) is sleeved on the rotor output shaft (24), and the eccentric shaft (2) is fixedly connected with the rotor output shaft (24) through a pin I (1); the bearing (4) is sleeved at the other end of the eccentric shaft (2), the spacer ring (5) is arranged in the bearing (4), the spacer ring (5) is sleeved at the other end of the eccentric shaft (2), the outer ring of the bearing (4) is arranged in one end of the connecting rod (3) and is movably connected with the connecting rod (3), the other end of the eccentric shaft (2) penetrates out of one end of the connecting rod (3), an opening check ring (6) is sleeved on the edge of the eccentric shaft (2) penetrating out of the connecting rod (3), and the check ring (6) is in contact with the connecting rod (3); the other end of the connecting rod (3) is provided with a U-shaped structure, one end of the piston (25) is provided with a piston rod (9), the piston rod (9) is arranged in the U-shaped structure of the connecting rod (3), the second pin (8) penetrates through the U-shaped structure of the connecting rod (3) and one end of the piston rod (9) in the U-shaped structure, and the piston rod (9) is movably connected with the U-shaped structure of the connecting rod (3) through the second pin (8); the upper middle part of the piston (25) is sleeved with a sealing ring (17), the guide strip (16) is sleeved at the edges of the two ends close to the piston rod (9), and the piston (25) is arranged in one end of the cylinder barrel (7) and moves in the cylinder barrel (7); the other end of the cylinder barrel (7) is sleeved with a main connecting sleeve (101), the cylinder barrel (7) is fixedly connected with the main connecting sleeve (101) through threaded fit, and a sealing gasket (15) is arranged between the other end of the cylinder barrel (7) and the main connecting sleeve (101); the main connecting sleeve (101) and the main connecting plate (10) are of an integrated structure, the main connecting sleeve (101) is connected with the middle connecting plate (20), a sealing gasket is arranged between the main connecting sleeve (101) and the middle connecting plate (20), a first check valve (141) and a second check valve (142) are arranged in the middle connecting plate (20), the middle connecting plate (20) is connected with the air tap seat (13), a separation seal (21) is arranged between the middle connecting plate (20) and the air tap seat (13), and the air tap seat (13) is provided with an air tap I (121) and an air tap II (122); the central line of the first air tap (121) is consistent with the central line of the first check valve (141), and the central line of the second air tap (122) is consistent with the central line of the second check valve (142); the air tap seat (13) is provided with a screw III (22), the screw III (22) penetrates through the air tap seat (13), the middle connecting plate (20) and the main connecting sleeve (101), and the screw III (22) enables the air tap seat (13), the middle connecting plate (20) and the main connecting sleeve (101) to be fixedly connected together; one end of the air tap I (121) is communicated with one end of the pipeline II (302), the air tap II (122) is communicated with one end of the pipeline I (301), the other end of the pipeline I (301) is communicated with a P hole of the two-position five-way electromagnetic valve (30), one end of the pipeline II (302) extends to form two pipelines, and the two pipelines are respectively communicated with a T1 hole and a T2 hole of the two-position five-way electromagnetic valve (30); when the medical compound plunger pump vacuumizes external equipment, the two-position five-way electromagnetic valve (30) comprises a valve core (27) and a valve body (28) working interface A; when the upper side coil I (26) of the electromagnetic valve (30) is electrified, the valve core (27) of the two-position five-way electromagnetic valve (30) is positioned at the upper position, the T1 port and the B port of the two-position five-way electromagnetic valve (30) are communicated, the P port and the A port are both in an open state, the T2 port is in a closed state, the micro motor (23) is electrified and started, and the power is transmitted to the connecting rod (3) through the movable connection and the coordination of the rotor output shaft (24) of the micro motor (23) and the eccentric shaft (2), so that the piston (25) is driven to move left and right; when the piston (25) moves leftwards, air enters the cylinder barrel (7) through the inlet air A of the two-position five-way electromagnetic valve (30), passes through the inlet P and is output through the outlet P, and enters the inlet one-way valve (142) through the outlet II (122), when the piston (25) moves to the left limit position, the inner volume of the cylinder barrel (7) reaches the maximum, the rotor output shaft (24) drives the piston (25) to move rightwards through the eccentric shaft (2) after rotating, the inner volume of the cylinder barrel (7) is reduced, and air passes through the outlet one-way valve (141) and enters the outlet T1 of the two-position five-way electromagnetic valve (30) through the outlet I (121), and is discharged outwards through the outlet B of the two-position five-way electromagnetic valve (30), so that the aim of vacuumizing a working device is achieved; when the medical compound plunger pump pressurizes external equipment, a second coil (29) of a two-position five-way electromagnetic valve (30) is electrified, a valve core (27) of the electromagnetic valve is positioned at a lower position, a P port and a B port of the two-position five-way electromagnetic valve (30) are communicated, a T2 port and an A port are both in an open state, a T1 port is in a closed state, a micro motor (23) is electrified and started, and power is transmitted to a connecting rod (3) through connection of an output shaft (24) of a motor rotor and an eccentric shaft (2), so that a piston (25) is driven to move left and right; when the piston (25) moves leftwards, external air is sent to the port P through the port B of the two-position five-way electromagnetic valve (30) and enters the cylinder barrel (7) through the air tap II (122) and the air inlet one-way valve (142); when the piston (25) moves to the left limit position, the inner volume of the cylinder barrel (7) reaches the maximum, the rotor output shaft (24) drives the piston (25) to move rightwards through the eccentric shaft (2) after rotating, the inner volume of the cylinder barrel (7) is reduced, gas in the cylinder is fed outwards through the gas outlet one-way valve (141) and the gas nozzle I (121), enters the T2 port of the two-position five-way electromagnetic valve (30), and is inflated into the working device through the A port, so that the aim of pressurizing the working device is fulfilled.

2. The medical compound plunger pump as set forth in claim 1 wherein: the miniature motor (23) is wrapped with cooling material.