CN215409123U

CN215409123U - High-pressure micropump

Info

Publication number: CN215409123U
Application number: CN202121380793.6U
Authority: CN
Inventors: 王海雨
Original assignee: Guangdong Keyukang Technology Co ltd
Current assignee: Guangdong Keyukang Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-01-04
Anticipated expiration: 2031-06-21

Abstract

The utility model discloses a high-pressure micropump, comprising: a rotation driving device provided with a rotating shaft; the pump body comprises a shell and at least two pump assemblies, the shell is connected with the rotary driving device, each pump assembly is driven through a rotating shaft, each pump assembly is provided with a variable volume cavity, and the volume of each variable volume cavity is driven by the corresponding pump assembly to change circularly; be equipped with in the shell and inhale total chamber and discharge total chamber, inhale total chamber and discharge total chamber and carry out one-way switch-on with all variable volume cavitys respectively, inhale total chamber and switch-on towards the direction of variable volume cavity, variable volume cavity switches-on towards the direction of discharge total chamber. Compared with the prior art, the volume of the variable volume cavity of each pump assembly can be kept at a normal size by configuring the plurality of pump assemblies which can be used jointly, a high-power rotary driving device is not needed, and therefore the manufacturing cost of the micropump can be reduced, and the volume of the micropump can be reduced.

Description

High-pressure micropump

Technical Field

The utility model relates to the technical field of displacement pumps, in particular to a high-pressure micro pump.

Background

The pump body is a device capable of removing fluid from a closed space or adding fluid from the closed space, the pump body which is widely applied in industry is a micro pump, and the micro pump has the advantages of small volume, low power consumption, stable working condition and the like, so that the pump body is widely applied to the industries of medical health, scientific research, laboratories, environmental protection, instruments and meters, chemical industry, household appliances and the like.

The existing high-pressure micropumps for conveying liquids are generally equipped with high-power motors and large-capacity volume cavities, and have large volumes and high manufacturing costs. How to design a high-pressure micro pump with small volume and low cost is a key development direction of the current pump body industry.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a high pressure micropump that solves one or more of the problems set forth in the prior art, and provides at least one useful alternative or creation.

A high-pressure micropump according to an embodiment of a first aspect of the present invention includes:

a rotation driving device provided with a rotating shaft;

the pump body comprises a shell and at least two pump assemblies, the shell is connected to the rotary driving device, each pump assembly is driven through the rotating shaft, each pump assembly is provided with a variable volume cavity, and the volume of each variable volume cavity is driven by the corresponding pump assembly to change circularly; be equipped with in the shell and inhale total chamber and the total chamber of discharging, the shell be equipped with respectively communicate in inhale total chamber with the total chamber of discharging inhale material mouth and row's material mouth, inhale total chamber with the total chamber of discharging carries out one-way switch-on with all variable volume cavitys respectively, inhale total chamber toward the direction of variable volume cavity switches on, variable volume cavity is past the direction of the total chamber of discharging switches on.

The high-pressure micropump provided by the embodiment of the utility model has at least the following beneficial effects: the rotary driving device drives all pump assemblies, so that the micropump can perform suction and discharge actions for multiple times through the material suction nozzle and the material discharge nozzle in each rotation period of the rotating shaft, and the suction amount and the discharge amount of all the pump assemblies can be superposed in the shell so as to improve the output pressure of the micropump on liquid; compared with the prior art, the volume of the variable volume cavity of each pump assembly can be kept at a normal size by configuring the plurality of pump assemblies which can be used jointly, a high-power rotary driving device is not needed, and therefore the manufacturing cost of the micropump can be reduced, and the volume of the micropump can be reduced.

According to some embodiments of the present invention, the number of the pump assemblies is two, and the two pump assemblies are respectively disposed in an up-down direction to maintain dynamic balance of the micro pump.

According to some embodiments of the present invention, each of the pump assemblies includes a piston rod, a cup and a valve plate, the two pump assemblies share the same piston rod, the rotating shaft is synchronously connected with an eccentric wheel, the middle portion of the piston rod is rotatably connected with the eccentric wheel, two ends of the piston rod are respectively connected with the two cups, the cups are hermetically connected with the valve plates, so that the variable volume cavity is formed between the cups and the valve plates, and the two valve plates are respectively connected to the upper side and the lower side of the housing. Because two pump subassemblies share same piston rod, the pump body has higher structural strength and better dynamic balance performance.

According to some embodiments of the present invention, the number of the pump assemblies is two or more, and the plurality of pump assemblies are circumferentially and uniformly distributed in different directions to maintain the dynamic balance of the micro pump.

According to some embodiments of the utility model, each of the pump assemblies comprises a piston rod, a cup and a valve plate, the rotating shaft is synchronously connected with a plurality of eccentric wheels, the number of the eccentric wheels is the same as that of the piston rods, each of the piston rods is rotatably connected with the corresponding eccentric wheel, the piston rod is connected with the cup, the cup is hermetically connected with the valve plate, so that the variable volume cavity is formed between the cup and the valve plate, and all the valve plates are connected with the housing. The pump body has better expandability because all the pump assemblies have their respective piston rods.

According to some embodiments of the utility model, the piston rod is mounted with a bearing through which the piston rod is in rotational connection with the eccentric. The arrangement of the bearing can reduce the rotation loss between the eccentric wheel and the piston rod so as to improve the quality of eccentric motion.

According to some embodiments of the utility model, the outer circumferential surface of the bearing is sleeved with wear-resistant hardware, which abuts against the piston rod and the bearing, respectively. The setting of wear-resisting hardware can effectively promote the life of bearing.

According to some embodiments of the present invention, in order to improve the sealing performance of the pump body, a sealing gasket is disposed between the valve plate and the housing, the sealing gasket is provided with the cup, and the valve plate and the housing are in sealed connection through the sealing gasket, that is, the variable volume cavity is formed between the sealing gasket and the valve plate.

According to some embodiments of the present invention, the sealing gasket is provided with a first mounting hole and a second mounting hole, the variable volume cavity and the total suction cavity are communicated through the first mounting hole, the variable volume cavity and the total discharge cavity are communicated through the second mounting hole, the first mounting hole and the second mounting hole are respectively provided with a first one-way conduction portion and a second one-way conduction portion, a conduction direction of the first one-way conduction portion is opposite to a conduction direction of the second one-way conduction portion, the first one-way conduction portion is used for realizing conduction of the total suction cavity to the direction of the variable volume cavity, and the second one-way conduction portion is used for realizing conduction of the variable volume cavity to the direction of the total discharge cavity.

According to some embodiments of the utility model, the rotary driving device is an electric motor or a pneumatic motor, the electric motor is driven by electric power, the pneumatic motor is driven by compressed gas, and the electric motor or the pneumatic motor can be selected by users according to different use conditions.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective view of a high pressure micropump in accordance with an embodiment of the present invention;

FIG. 2 is a top view of the high pressure micro-pump shown in FIG. 1;

FIG. 3 is an exploded view of the high pressure micropump shown in FIG. 1;

FIG. 4 is a cross-sectional view of the high pressure micro-pump of FIG. 2 taken along line A-A;

FIG. 5 is a cross-sectional view of the high pressure micro-pump of FIG. 2 taken along line B-B;

fig. 6 is a schematic perspective view of a housing according to an embodiment of the present invention.

In the drawings: 100-rotary driving device, 200-pump body, 110-rotating shaft, 111-eccentric wheel, 400-shell, 300-pump assembly, 310-piston rod, 321-leather cup, 330-valve plate, 311-bearing, 301-variable volume cavity, 410-suction total cavity, 420-discharge total cavity, 411-suction nozzle, 421-discharge nozzle, 320-sealing gasket, 322-first mounting hole, 323-second mounting hole, 510-first valve plate, 520-first one-way conducting piece, 610-second valve plate, 620-second one-way conducting piece, 511-suction port, 611-discharge port and 700-wear-resistant hardware.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 to 3, the high pressure micropump according to the first aspect of the present invention includes a rotation driving device 100 and a pump body 200, wherein the rotation driving device 100 may be a motor, the rotation driving device 100 is provided with a rotation shaft 110, and the rotation shaft 110 is synchronously connected with an eccentric 111; in order to realize the synchronous connection between the rotating shaft 110 and the eccentric wheel 111, the rotating shaft 110 is provided with a flat position, the eccentric wheel 111 is provided with an eccentric hole matched with the structure of the flat position, or the rotating shaft 110 and the eccentric hole are synchronously connected through a key and a key slot. In other embodiments, an air motor may be used in place of the electric motor, but because of its large size, an air motor is not preferred for the present invention.

As shown in fig. 3 to 6, the pump body 200 includes a housing 400 and two pump assemblies 300, the housing 400 is connected to the rotary driving device 100, the two pump assemblies 300 are respectively disposed in an up-down direction, each of the two pump assemblies 300 includes a piston rod 310, a cup 321 and a valve plate 330, wherein the two pump assemblies 300 share a same piston rod 310, a bearing 311 is installed in a middle portion of the piston rod 310, and the piston rod 310 and the eccentric wheel 111 are rotatably connected through the bearing 311 to reduce a rotational loss between the eccentric wheel 111 and the piston rod 310, so as to improve a mass of an eccentric motion; the two ends of the piston rod 310 are respectively connected with the two packing cups 321, the packing cups 321 are hermetically connected with the valve plate 330, so that a variable-volume cavity 301 is formed between the packing cups 321 and the valve plate 330, the piston rod 310 also moves up and down along with the eccentric rotation of the eccentric wheel 111, and the volumes of the two variable-volume cavities 301 are driven by the piston rod 310 to change alternately. Two valve plates 330 is connected through a plurality of connecting bolt respectively the upper and lower both sides of shell 400, be equipped with in the shell 400 and inhale total chamber 410 and discharge total chamber 420, shell 400 be equipped with respectively communicate in inhale total chamber 410 with discharge total chamber 420 inhale material mouth 411 and row's mouth 421, inhale total chamber 410 with discharge total chamber 420 carries out one-way switch-on with all variable volume cavity 301 respectively, inhale total chamber 410 towards the direction of variable volume cavity 301 switches-on, variable volume cavity 301 towards the direction of discharge total chamber 420 switches-on to this ensures that inhale total chamber 410 only is used for inhaling liquid, and discharge total chamber 420 only is used for discharging liquid. When the cavity volume of the leather cup 321 positioned above is gradually increased along with the movement of the piston rod 310, the variable volume cavity 301 positioned above is in a negative pressure state, and in this state, the external liquid can enter the variable volume cavity 301 positioned above through the suction main cavity 410; at the same time, when the cavity volume of the lower cup 321 gradually decreases with the movement of the piston rod 310, the lower variable-volume cavity 301 is in a positive pressure state, and in this state, the liquid in the lower variable-volume cavity 301 can be discharged to the outside through the discharge total cavity 420. As the piston rod 310 continues to move, when the cavity volume of the leather cup 321 located above gradually decreases along with the piston movement of the piston rod 310, the variable volume cavity 301 located above is in a positive pressure state, and in this state, the liquid in the variable volume cavity 301 located above can be discharged to the outside through the discharge total cavity 420; at the same time, however, when the cavity volume of the lower cup 321 gradually increases with the piston movement of the piston rod 310, the upper variable-volume cavity 301 is in a negative pressure state, and in this state, the external liquid can enter the lower variable-volume cavity 301 through the suction main cavity 410. With the continuous movement of the piston rod 310, the two variable volume cavities 301 are alternately in two different working states, so that the micro pump can perform two suction and discharge actions through the suction nozzle 411 and the discharge nozzle 421 in each rotation period of the rotating shaft 110, and the suction amount and the discharge amount of the two pump assemblies 300 can be overlapped in the housing 400 to increase the output pressure of the micro pump on the liquid.

In some embodiments of the present invention, in order to improve the sealing performance of the pump body 200, a sealing gasket 320 is disposed between the valve plate 330 and the housing 400, and since the sealing gasket 320 is a rubber member and the cup 321 is a rubber member, the cup 321 is disposed on the sealing gasket 320, that is, the variable volume cavity 301 is formed between the sealing gasket 320 and the valve plate 330, in order to simplify the structure. Each sealing gasket 320 is provided with a first mounting hole 322 and a second mounting hole 323, the variable volume cavity 301 and the suction total cavity 410 are communicated through the first mounting hole 322, the variable volume cavity 301 and the discharge total cavity 420 are communicated through the second mounting hole 323, the first mounting hole 322 and the second mounting hole 323 are respectively provided with a first one-way conduction part and a second one-way conduction part, the conduction direction of the first one-way conduction part is opposite to that of the second one-way conduction part, the first one-way conduction part is used for realizing the conduction of the suction total cavity 410 to the direction of the variable volume cavity 301, and the second one-way conduction part is used for realizing the conduction of the variable volume cavity 301 to the direction of the discharge total cavity 420. Specifically, the first one-way conduction part comprises a first valve plate 510 and a first one-way conduction piece 520, the second one-way conduction part comprises a second valve plate 610 and a second one-way conduction piece 620, the first valve plate 510 and the second valve plate 610 are respectively provided with a suction port 511 and a discharge port 611, the first one-way conduction piece 520 and the second one-way conduction piece 620 can be both selected as a diced umbrella, the first one-way conduction piece 520 and the second one-way conduction piece 620 are respectively installed on the first valve plate 510 and the second valve plate 610, at this moment, the first one-way conduction piece 520 covers the suction port 511 on one side of the variable volume cavity 301, and the second one-way conduction piece 620 covers the discharge port 611 on one side of the discharge main cavity 420.

In some embodiments of the present invention, as shown in fig. 3 and 4, in order to reduce the wear of the eccentric wheel 111 on the bearing 311 during the eccentric motion, thereby prolonging the service life of the bearing 311, the outer circumferential surface of the bearing 311 is sleeved with a wear-resistant hardware 700, the wear-resistant hardware 700 is optionally made of stainless steel, and the wear-resistant hardware 700 abuts against the piston rod 310 and the bearing 311, respectively.

In other embodiments, in order to provide the pump body 200 with better expansion performance, the piston rods 310 of each pump assembly 300 are independently arranged, at this time, the number of the pump assemblies 300 is no longer limited to two, and may be two or more, all the pump assemblies 300 are circumferentially and uniformly distributed in different directions, each pump assembly 300 includes a piston rod 310, a cup 321 and a valve plate 330, the rotating shaft 110 is synchronously connected with a plurality of eccentric wheels 111, and the number of the eccentric wheels 111 is the same as the number of the piston rods 310. Since the remaining structure of the present embodiment is identical to that of the previous embodiment, repeated description is not intended in this embodiment.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A high pressure micropump, comprising:

a rotation driving device (100) provided with a rotating shaft (110);

the pump body (200) comprises a shell (400) and at least two pump assemblies (300), the shell (400) is connected to the rotary driving device (100), each pump assembly (300) is driven by the rotating shaft (110), each pump assembly (300) is provided with a variable-volume cavity (301), and the volume of each variable-volume cavity (301) is driven by the corresponding pump assembly (300) to change in a circulating mode; be equipped with in shell (400) and inhale total chamber (410) and discharge total chamber (420), shell (400) be equipped with respectively communicate in inhale total chamber (410) with the total chamber (420) of discharging inhale material mouth (411) and row's material mouth (421), inhale total chamber (410) with discharge total chamber (420) carry out one-way conduction with all variable volume cavity (301) respectively, inhale total chamber (410) toward the direction of variable volume cavity (301) switches on, variable volume cavity (301) toward the direction of discharging total chamber (420) switches on.

2. The high pressure micropump of claim 1, wherein: the number of the pump assemblies (300) is two, and the two pump assemblies (300) are respectively arranged in the upward and downward directions.

3. The high pressure micropump of claim 2, wherein: every pump assembly (300) all includes piston rod (310), leather cup (321) and valve plate (330), two same piston rod (310) of pump assembly (300) sharing, pivot (110) synchronous connection has an eccentric wheel (111), the middle part of piston rod (310) with eccentric wheel (111) rotate to be connected, the both ends of piston rod (310) respectively with two leather cup (321) are connected, leather cup (321) with valve plate (330) sealing connection makes leather cup (321) with form between valve plate (330) variable volume cavity (301), two valve plate (330) are connected respectively the upper and lower both sides of shell (400).

4. The high pressure micropump of claim 1, wherein: the number of the pump assemblies (300) is two or more, and the pump assemblies (300) are circumferentially and uniformly distributed towards different directions respectively.

5. The high pressure micropump of claim 4, wherein: each pump subassembly (300) all includes piston rod (310), leather cup (321) and valve plate (330), pivot (110) synchronous connection has a plurality of eccentric wheels (111), the quantity of eccentric wheel (111) with the quantity of piston rod (310) is unanimous, every piston rod (310) all rotate to be connected in corresponding eccentric wheel (111), piston rod (310) with leather cup (321) are connected, leather cup (321) with valve plate (330) sealing connection makes leather cup (321) with form between valve plate (330) variable volume cavity (301), all valve plates (330) all connect in shell (400).

6. The high-pressure micropump of claim 3 or 5, wherein: the piston rod (310) is provided with a bearing (311), and the piston rod (310) is rotatably connected with the eccentric wheel (111) through the bearing (311).

7. The high pressure micropump of claim 6, wherein: the outer peripheral face cover of bearing (311) is equipped with wear-resisting hardware (700), wear-resisting hardware (700) respectively the butt in piston rod (310) with bearing (311).

8. The high-pressure micropump of claim 3 or 5, wherein: a sealing gasket (320) is arranged between the valve plate (330) and the shell (400), the sealing gasket (320) is provided with the cup (321), and the valve plate (330) and the shell (400) are in sealing connection through the sealing gasket (320).

9. The high pressure micropump of claim 8, wherein: seal gasket (320) are equipped with first mounting hole (322) and second mounting hole (323), variable volume cavity (301) with inhale total chamber (410) and pass through first mounting hole (322) communicate, variable volume cavity (301) with discharge total chamber (420) pass through second mounting hole (323) communicate, first one-way conduction portion and second one-way conduction portion are installed respectively to first mounting hole (322) and second mounting hole (323), and the direction of conducting of first one-way conduction portion is opposite with the direction of conducting of second one-way conduction portion.

10. The high pressure micropump of claim 1, wherein: the rotary drive device (100) is an electric motor or a pneumatic motor.