CN114320829A

CN114320829A - Dry vacuum pump

Info

Publication number: CN114320829A
Application number: CN202111605549.XA
Authority: CN
Inventors: 陈信江; 吴志明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-25
Filing date: 2021-12-25
Publication date: 2022-04-12

Abstract

The invention relates to the technical field of dry vacuum pumps, in particular to a dry vacuum pump which comprises a piston cylinder, wherein a left sliding plug and a right sliding plug are connected in the piston cylinder in a sliding manner, the upper ends of the left sliding plug and the right sliding plug are rotatably connected with a rotating barrel, the outer surface of the rotating barrel is meshed with a gear, the gear is rotatably connected with a drive, the upper ends of the left sliding plug and the right sliding plug are respectively connected with a first spring hose and a second spring hose, and the rotating barrel is rotatably connected to a rotating rod. The device belongs to the oil-free reciprocating vacuum pump, and compared with an oil liquid vacuum pump, the oil-free reciprocating vacuum pump has the advantages that oil drops and other phenomena cannot occur, and the pollution of the extracted gas is small.

Description

Dry vacuum pump

Technical Field

The invention relates to the technical field of dry vacuum pumps, in particular to a dry vacuum pump.

Background

In 2013, most of mechanical vacuum pumps used in the vacuum industry use oil, water or other polymers as working media of the pumps, and have multiple functions of cooling, sealing, lubricating and the like in the pumps. With the development of scientific technology and the expansion of vacuum application field, two problems which need to be solved urgently appear in the original mechanical vacuum pump and the air exhaust system formed by the same: one is that the return of the working medium from the pump contaminates the extraction vessel, and this return affects the quality and quantity of the product in many cases, increasing the maintenance costs of the equipment.

An oil-free dry mechanical vacuum pump (also called a dry mechanical pump for short) refers to a mechanical vacuum pump in which the pump can start to pump air from atmospheric pressure and can directly discharge the pumped air to the atmosphere, no oil or other working media exist in a pump cavity, and the limit pressure of the pump is the same magnitude as or close to that of an oil-sealed vacuum pump. An oil-free reciprocating vacuum pump is a vacuum pump that draws air by periodically changing the working volume of a pump chamber (cylinder) by reciprocating a piston, and is also called a piston vacuum pump. Reciprocating vacuum pumps are similar in construction to reciprocating piston compressors. When the vacuum pumping device works, the air suction pipe is connected with the vacuumized container, and the exhaust pipe is communicated with the atmosphere. The reciprocating vacuum pump can be used for vacuum distillation, vacuum concentration, vacuum crystallization, vacuum filtration, vacuum drying, concrete vacuum operation and the like.

The existing vacuum pump uses oil liquid medium to generate oil drops and other phenomena, gas and a container can be polluted when gas is extracted, an unsatisfactory effect on extraction strength is generated after the defects are overcome when a common dry vacuum pump is used, and the corresponding limit vacuum is low and needs to be matched with a Roots vacuum pump to improve the limit vacuum.

Disclosure of Invention

The invention aims to provide a dry vacuum pump, and the technical problems to be solved by the invention are that the oil liquid medium used in the conventional vacuum pump has the phenomena of oil drops and the like, the gas and a container can be polluted during gas extraction, the effect unsatisfactory in extraction strength is realized after the defects are overcome when the common dry vacuum pump is used, the corresponding ultimate vacuum is low, and the ultimate vacuum is required to be improved by matching with a Roots vacuum pump.

In order to achieve the purpose, the invention adopts the following technical scheme: a dry vacuum pump comprises a piston cylinder, wherein a left sliding plug and a right sliding plug are connected in the piston cylinder in a sliding mode, the center of the piston cylinder is rotatably connected with a rotating barrel, the rotating barrel is positioned above the left sliding plug and the right sliding plug, the outer surface of the rotating barrel is meshed with a gear, the gear is rotatably connected with a motor, the upper ends of the left sliding plug and the right sliding plug are respectively connected with a first spring hose and a second spring hose, and the rotating barrel is rotatably connected to a rotating rod;

wherein: the piston cylinder comprises a cylinder body shell, a bottom plate and a partition plate, the bottom plate and the partition plate are arranged inside the cylinder body shell, and a first check valve and a second check valve are symmetrically arranged on the bottom plate.

The left sliding plug and the right sliding plug are identical in structure, the right sliding plug comprises a sliding block, a sealing ring, a third one-way valve and a cylindrical barrel, the sealing ring is arranged on the outer surface of the sliding block in a surrounding mode, the sealing ring is attached to the inner side wall of the piston cylinder, and the third one-way valve is arranged inside the sliding block; the columnar cylinder is fixedly arranged at the center of the sliding block, is of a hollow structure and is communicated with the piston cylinder through a third check valve, and a connecting piece is arranged between the columnar cylinder and the rotating barrel.

The connecting piece comprises a magnetic block fixed at the top of the columnar cylinder, and a first magnetic disk and a second magnetic disk which are fixedly arranged on the inclined surface of the rotating cylinder, the first magnetic disk and the second magnetic disk are symmetrically arranged in structure, and the magnetic poles of the lower surfaces of the first magnetic disk and the second magnetic disk are opposite.

Specifically, a circle of gear ring is fixed on the outer side of the upper end of the rotating barrel, the gear ring is meshed with the gear, and the rotating barrel is rotatably connected with the rotating rod.

Compared with the prior art, the invention provides a dry vacuum pump which has the following beneficial effects:

1. this dry vacuum pump, the initiative cooling mechanism, the motor makes gear revolve, and the ring gear drives then and rotates the bucket rotation, drives the disk then and rotates, through adopting the magnetism cooperation along with rotating the bucket rotation and changing is the height of a column section of thick bamboo, and then causes the column section of thick bamboo to regularly slide from top to bottom, thereby left side sliding plug and right sliding plug carry out the required piston motion of suction in turn, thereby can reduce the device's wearing and tearing and improve the device's life.

2. In the dry vacuum pump, the flow directions of the third one-way valve, the first one-way valve and the second one-way valve are all upward, when the left sliding plug and the right sliding plug alternately ascend, the first one-way valve and the second one-way valve are opened, and the third one-way valve is closed; when the left sliding plug and the right sliding plug fall alternately, the first one-way valve and the second one-way valve are closed, the third one-way valve is opened, and then suction is performed in a reciprocating and uninterrupted stroke.

3. The device belongs to an oil-free reciprocating vacuum pump, and compared with an oil vacuum pump, the device has the advantages that oil drops and the like are avoided, the pollution of extracted gas is less, and the environment-friendly effect is better.

Drawings

FIG. 1 is a structural view of a dry vacuum pump according to the present invention;

fig. 2 is a schematic view of the internal structure of the sliding plug according to the present invention.

In the figure: 1. a piston cylinder; 101. a cylinder housing; 102. a base plate; 103. a partition plate; 104. a first check valve; 105. a second one-way valve; 2. a left sliding plug; 3. a right sliding plug; 31. a slider; 32. a seal ring; 33. a third check valve; 34. a cylindrical barrel; 35. a magnetic block; 4. rotating the barrel; 41. a magnetic disk; 42. a ring gear; 5. a gear; 6. a motor; 7. a first spring hose; 8. a second spring hose; 9. rotating the rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations 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 device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 2, a dry vacuum pump comprises a piston cylinder 1, wherein a left sliding plug 2 and a right sliding plug 3 are slidably connected in the piston cylinder 1, a rotating barrel 4 is rotatably connected in the center of the piston cylinder 1, the rotating barrel 4 is positioned above the left sliding plug 2 and the right sliding plug 3, the outer surface of the rotating barrel 4 is meshed with a gear 5, the gear 5 is rotatably connected with a motor 6, the upper ends of the left sliding plug 2 and the right sliding plug 3 are respectively connected with a first spring hose 7 and a second spring hose 8, and the rotating barrel 4 is rotatably connected to a rotating rod 9;

wherein: the piston cylinder 1 comprises a cylinder body shell 101, a bottom plate 102 and a partition plate 103, the bottom plate 102 and the partition plate 103 are arranged inside the cylinder body shell 101, and a first check valve 104 and a second check valve 105 are symmetrically arranged on the bottom plate 102; by providing the first check valve 104 and the second check valve 105 in such a manner that the flow directions are both upward, the first check valve 104 and the second check valve 105 are opened when the left slide plug 2 and the right slide plug 3 are alternately raised, and the first check valve 104 and the second check valve 105 are closed when the left slide plug 2 and the right slide plug 3 are alternately lowered.

Specifically, the left sliding plug 2 and the right sliding plug 3 have the same structure, the right sliding plug 3 comprises a sliding block 31, a sealing ring 32, a third check valve 33 and a cylindrical barrel 34, the sealing ring 32 is surrounded on the outer surface of the sliding block 31, the sealing ring 32 is attached to the inner side wall of the piston cylinder 1, and the third check valve 33 is arranged inside the sliding block 31; the columnar cylinder 34 is fixedly arranged at the center of the sliding block 31, the columnar cylinder 34 is of a hollow structure and is communicated with the piston cylinder 1 through a third one-way valve 33, a connecting piece is arranged between the columnar cylinder 34 and the rotating barrel 4, and the columnar cylinder 34 can move up and down according to the rotation of the rotating barrel 4 through the arrangement of the connecting piece; the second spring hose 8 communicates with the inside of the cylindrical barrel 34.

Through adopting above-mentioned technical scheme, through the periphery at sliding block 31 around there being two rings of sealing washer 32, when left side activity stopper 2 and right side activity stopper 3 up-and-down alternate motion, sealing washer 32 laminates with the inside lateral wall of stopper jar 1 mutually to can make sliding block 31's leakproofness improve, can also discharge the outside of the device with gas through first spring hose 7 and second spring hose 8 simultaneously.

The connecting piece comprises a magnetic block 35 fixed at the top of the columnar cylinder 34, and a first magnetic disk 41 and a second magnetic disk 42 which are fixedly arranged on the inclined surfaces of the rotating barrel 4, wherein the first magnetic disk 41 and the second magnetic disk 42 are symmetrically arranged, and the magnetic poles of the lower surfaces of the first magnetic disk 41 and the second magnetic disk 42 are opposite. When the magnetic block 35 is located at the lowest point, the magnetic properties of the opposite surfaces of the magnetic block 35 and the second magnetic disk 42 are opposite, the magnetic block 35 and the second magnetic disk 42 are in a state of opposite poles attraction, at this time, the second magnetic disk 42 rotates, the magnetic block 35, the columnar cylinder 34 and the right sliding plug 3 are attracted by the second magnetic disk 42, along with the rotation of the second magnetic disk 42, the magnetic block 35, the columnar cylinder 34 and the right sliding plug 3 are attracted upwards, and through the matching of the second check valve 105 and the third check valve 33, the process of inhaling the right sliding plug 3 is realized; when the magnetic block 35 is located at the highest point, the magnetic properties of the opposite surfaces of the magnetic block 35 and the first magnetic disk 41 are the same, the magnetic block 35 and the first magnetic disk 41 are in a state of homopolar repulsion, at this time, the first magnetic disk 41 rotates, the magnetic block 35, the columnar cylinder 34 and the right sliding plug 3 are pushed downwards by the first magnetic disk 41, along with the rotation of the first magnetic disk 41, the magnetic block 35, the columnar cylinder 34 and the right sliding plug 3 are pushed downwards, and through the matching of the first check valve 104 and the third check valve 33, the process of exhausting air from the right sliding plug 3 is realized. The invention can reduce the abrasion between the columnar cylinder 34 and the surface of the rotating barrel 4 by adopting the mode, can also realize overload protection by adopting the mode, and when the negative pressure is greater than the adsorption force of magnetic force, the magnetic block 35 can be separated from the second magnetic disk 42, thereby avoiding the damage of equipment and being suitable for occasions with low requirement on negative pressure.

By adopting the technical scheme, the gear 5 rotates by starting the motor 6, then the gear ring 43 drives the rotating barrel 4 to rotate, the rotating barrel 4 drives the magnetic disc 41 to rotate, through magnetic cooperation, the height of the cylindrical barrel 34 is changed along with the rotation of the rotating barrel 4, so that the cylindrical barrel 34 slides up and down regularly, then the left sliding plug 2 and the right sliding plug 3 alternately perform piston motion required by suction, the flow directions of the third one-way valve 33, the first one-way valve 104 and the second one-way valve 105 are all upward, when the left sliding plug 2 and the right sliding plug 3 alternately ascend, the first one-way valve 104 and the second one-way valve 105 are opened, and the third one-way valve 33 is closed; when the left sliding plug 2 and the right sliding plug 3 are alternately descended, the first check valve 104 and the second check valve 105 are closed, the third check valve 33 is opened, and the suction stroke is repeated without interruption.

Specifically, a circle of gear ring 43 is fixed on the outer side of the upper end of the rotary barrel 4, the gear ring 43 is meshed with the gear 5, and the rotary barrel 4 is rotatably connected with the rotary rod 9.

Through adopting above-mentioned technical scheme, through the first disk 41 of lower terminal surface slope fixedly connected with and the second disk 42 at rotation bucket 4, can make rotation bucket 4 drive first disk 41 and second disk 42 and rotate together in the pivoted, set up first disk 41 and second disk 42 through the slope, can make first disk 41 and second disk 42 drive column section of thick bamboo 34 up-and-down alternating motion through magnetism, through being fixed with round ring gear 43 and gear 5 intermeshing in the upper end outside rotating bucket 4, can make gear 5 drive ring gear 43 rotate and then drive rotation bucket 4 and rotate.

Specifically, the magnetic block 35 is an electromagnet. The connection strength of the connecting piece can be changed by changing the magnetism of the electromagnet, the first magnetic disc 41 and the second magnetic disc 42 preferably adopt neodymium iron boron magnets, so that different overload protection requirements of the pump body can be realized by changing the magnetism of the magnetic block 35, the first magnetic disc 41 and the second magnetic disc 42 can be attracted or repelled with the magnet 35 by adjusting the magnetic pole of the magnet 35, for example, the magnet 35 is always at the lowest point position by changing the magnetism of the magnet 35, so that the left sliding plug 2 or the right sliding plug 3 can not work, and the variable effect of the vacuum pump can be realized.

The working principle is as follows: the starter motor 6 makes the gear 5 rotate, then the ring gear 43 drives the rotation barrel 4 to rotate, the rotation barrel 4 drives the magnetic disk 41 to rotate, through magnetic cooperation, what change along with the rotation of the rotation barrel 4 is the height of the cylindrical barrel 34, and then the cylindrical barrel 34 is caused to regularly slide up and down, and then the left sliding plug 2 and the right sliding plug 3 alternately perform the piston motion required for pumping.

The flow direction of the third check valve 33, the first check valve 104 and the second check valve 105 is upward, when the left sliding plug 2 and the right sliding plug 3 alternately ascend, the first check valve 104 and the second check valve 105 are opened, and the third check valve 33 is closed; when the left sliding plug 2 and the right sliding plug 3 are alternately descended, the first check valve 104 and the second check valve 105 are closed, the third check valve 33 is opened, and the suction stroke is repeated without interruption.

According to the invention, the device belongs to an oil-free reciprocating vacuum pump, compared with an oil vacuum pump, the phenomena of oil drops and the like cannot occur, the pollution of extracted gas is less, and the device is more environment-friendly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a dry vacuum pump, includes piston cylinder (1), sliding connection has left slip stopper (2) and right slip stopper (3) in piston cylinder (1), its characterized in that: the center of the piston cylinder (1) is rotatably connected with a rotating barrel (4), the rotating barrel (4) is positioned above the left sliding plug (2) and the right sliding plug (3), the outer surface of the rotating barrel (4) is meshed with the gear (5), the gear (5) is rotatably connected with a motor (6), the upper ends of the left sliding plug (2) and the right sliding plug (3) are respectively connected with a first spring hose (7) and a second spring hose (8), and the rotating barrel (4) is rotatably connected to a rotating rod (9);

wherein: the piston cylinder (1) comprises a cylinder body shell (101), a bottom plate (102) and a partition plate (103), the bottom plate (102) and the partition plate (103) are arranged inside the cylinder body shell (101), and a first check valve (104) and a second check valve (105) are symmetrically arranged on the bottom plate (102).

2. A dry vacuum pump as claimed in claim 1, wherein: the left sliding plug (2) and the right sliding plug (3) are identical in structure, the right sliding plug (3) comprises a sliding block (31), a sealing ring (32), a third one-way valve (33) and a cylindrical barrel (34), the sealing ring (32) is arranged on the outer surface of the sliding block (31) in a surrounding mode, the sealing ring (32) is attached to the inner side wall of the piston cylinder (1), and the third one-way valve (33) is arranged inside the sliding block (31); the columnar cylinder (34) is fixedly arranged at the center of the sliding block (31), the columnar cylinder (34) is of a hollow structure and is communicated with the piston cylinder (1) through a third one-way valve (33), and a connecting piece is arranged between the columnar cylinder (34) and the rotating barrel (4).

3. A dry vacuum pump as claimed in claim 3, wherein: the connecting piece comprises a magnetic block (35) fixed at the top of the cylindrical barrel (34), and a first magnetic disk (41) and a second magnetic disk (42) which are fixedly arranged on the inclined surface of the rotating barrel (4), wherein the first magnetic disk (41) and the second magnetic disk (42) are symmetrically arranged in structure, and the magnetic poles of the lower surfaces of the first magnetic disk (41) and the second magnetic disk (42) are opposite.

4. A dry vacuum pump as claimed in claim 4, wherein: specifically, a circle of gear ring (43) is fixed on the outer side of the upper end of the rotating barrel (4), the gear ring (43) is meshed with the gear (5), and the rotating barrel (4) is rotatably connected with the rotating rod (9).

5. A dry vacuum pump as claimed in claim 5, wherein: the magnetic block (35) is an electromagnet.