CN215633582U

CN215633582U - Five-cylinder piston vacuum pump

Info

Publication number: CN215633582U
Application number: CN202121396743.7U
Authority: CN
Inventors: 庞华国; 叶创明
Original assignee: Guangdong Aidi Electromechanical Technology Co ltd
Current assignee: Guangdong Aidi Electromechanical Technology Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-01-25
Anticipated expiration: 2031-06-23

Abstract

The utility model provides a five-cylinder piston vacuum pump which comprises a shell, a pump nozzle, an air inlet nozzle, a one-way valve structure, a piston structure, an eccentric driving piece and a driving motor, wherein the pump nozzle is arranged on the top surface of the shell, the air inlet nozzle is arranged at the lower end of the shell, a valve frame and a piston frame are arranged in the shell from top to bottom, the valve frame is provided with the one-way valve structure, an air outlet cavity is formed between the pump nozzle and the one-way valve structure, the piston structure is arranged on the piston frame, an air inlet bin is formed between the outer part of the piston structure and the shell and is communicated with the air inlet nozzle, the one-way valve structure can enable air to pass through the air inlet bin to the air outlet cavity in a one-way mode, the lower end of the piston structure is further provided with the eccentric driving piece, and a sealing structure is further arranged between the driving motor and the shell. According to the utility model, the oil seal is added on the motor output shaft, the air inlet bin can effectively form a vacuum bin, and better sealing performance can be kept even if the vacuum bin is used for a long time and in various complex environments.

Description

Five-cylinder piston vacuum pump

Technical Field

The utility model relates to the technical field of vacuum pumps, in particular to a five-cylinder piston vacuum pump.

Background

The vacuum pump is a rotary variable-capacity vacuum pump, can be used in a wider pressure range by being matched with a backing pump, and has a mechanical device with larger pumping speed and insensitivity to dust and water vapor contained in the pumped gas. The vacuum pump is widely applied to the fields of plastic machinery, pesticide chemical industry, dye chemical industry, tile machinery, low-temperature equipment, paper making machinery, pharmaceutical chemical industry, food machinery, industrial electric furnaces, electronic industry, vacuum equipment, chemical fertilizers, metallurgy, petroleum, mines, foundation treatment and the like. The vacuum pump in the prior art has the defects of complex structure, small and stable vacuum performance and the like, and is low in working efficiency, high in cost and inconvenient to install and maintain.

In the existing wastewater treatment, machine faults are often caused by hairs and floccules in the wastewater, so that sewage is discharged by using a method of pumping air by using the vacuum capacity of a vacuum pump, so that the sewage does not directly contact a pump valve, and the faults are reduced.

The vacuum service life of the existing vacuum pump is attenuated too fast, the main reason is sealing failure, and the sealing failure is mainly caused by: 1. the cooperation between the assembly faces results. 2. The clearance between the motor shaft and the bearing is increased due to abrasion.

There is a need for a new type of piston vacuum pump that solves the above mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a five-cylinder piston vacuum pump, which solves the problems of poor air tightness and short service life of the existing vacuum pump by technically improving the existing vacuum pump.

In order to solve the technical problems, the utility model specifically adopts the following technical scheme:

a five-cylinder piston vacuum pump comprises a shell, a pump nozzle, an air inlet nozzle, a one-way valve structure, a piston structure, an eccentric driving piece and a driving motor, wherein the pump nozzle is arranged on the top surface of the shell, the air inlet nozzle is arranged at the lower end of the shell, a valve frame and a piston frame are arranged in the shell from top to bottom, the valve frame is provided with the one-way valve structure, an air outlet cavity is formed between the pump nozzle and the one-way valve structure, the piston structure is arranged on the piston frame, an air inlet bin is formed between the outer part of the piston structure and the shell and communicated with the air inlet nozzle, the one-way valve structure can enable air to pass through the air inlet bin to the air outlet cavity in a single direction, the lower end of the piston structure is also provided with the eccentric driving piece which is connected with the driving motor arranged at the lower end of the shell, and the eccentric driving piece can enable the eccentric driving piece to sequentially extrude the piston structure along with the rotation of the driving motor, and a sealing structure is arranged between the driving motor and the shell.

Preferably, the eccentric driving part comprises an eccentric wheel, a lever and a connecting rod, the lower end of the eccentric wheel is connected with the output end of the driving motor, the upper end of the eccentric wheel is connected with the connecting rod through the lever, and the connecting rod is sleeved outside the piston structure.

Preferably, the piston structure is a five-cylinder piston.

Preferably, the check valve structure includes umbrella valve and air inlet flap valve, the umbrella valve sets up with piston structure inner chamber is corresponding, air inlet flap valve intercommunication air inlet bin and air outlet chamber.

Preferably, the sealing structure is an oil seal, and the oil seal can seal a gap between the output shaft of the drive motor and the shell.

Preferably, a contraction spring is arranged in the oil seal.

Compared with the prior art, the utility model has the following beneficial effects:

the driving motor drives the eccentric wheel to rotate, the connecting rod is driven by the eccentric wheel to rotate and swing in a conical surface mode by taking the rotating axis of the eccentric wheel as the center, and in the swinging process of the connecting rod, all pistons are periodically and sequentially extruded and loosened by the connecting rod, so that the volume difference is generated, and the pumping is realized. When the piston is extruded by the connecting rod, the air in the piston obtains kinetic energy due to extrusion, the umbrella valve is pushed open to enter the air outlet chamber, the piston can be loosened along with the continuous rotation of the motor, the air is sucked into the piston through the air inlet flap valve under the action of atmospheric pressure, and when the motor rotates to the position again, the air is extruded again and is discharged through the discharge pump nozzle to complete circulation.

According to the utility model, the oil seal is added on the motor output shaft, and the air inlet bin can effectively form a vacuum bin due to the sealing property of the oil seal between the motor shaft and the shell, so that the air inlet bin can keep better sealing property when being used for a long time and used in various complex environments.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic diagram of an explosive structure according to the present invention;

FIG. 3 is a top view of the valve cage of the present invention;

FIG. 4 is a schematic cross-sectional view of the present invention;

description of reference numerals: the air inlet valve comprises a shell 1, a valve frame 11, a piston frame 12, a pump nozzle 2, an air inlet nozzle 3, a one-way valve structure 4, an umbrella valve 41, an air inlet flap valve 42, an air outlet chamber 5, a piston structure 6, an air inlet bin 7, an eccentric driving piece 8, a connecting rod 81, a lever 82, an eccentric wheel 83, a driving motor 9 and a sealing structure 10.

Detailed Description

The details of the present invention will be described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, this embodiment provides a five-cylinder piston vacuum pump, which includes a casing 1, a pump nozzle 2, an air inlet nozzle 3, a check valve structure 4, a piston structure 6, an eccentric driving member 8, and a driving motor 9, where the pump nozzle 2 is disposed on the top surface of the casing 1, the air inlet nozzle 3 is disposed at the lower end of the casing 1, a valve frame 11 and a piston frame 12 are disposed in the casing 1 from top to bottom, the check valve structure 4 is disposed on the valve frame 11, an air outlet chamber 5 is formed between the pump nozzle 2 and the check valve structure 4, the piston structure 6 is mounted on the piston frame 12, an air inlet chamber 7 is formed between the outside of the piston structure 6 and the casing 1, the air inlet chamber 7 is communicated with the air inlet nozzle 3, the check valve structure 4 enables air to pass through the air inlet chamber 7 into the air outlet chamber 5 in a single direction, the eccentric driving member 8 is further disposed at the lower end of the piston structure 6, the eccentric driving member 8 is connected to the driving motor 9 disposed at the lower end of the casing 1, the eccentric driving part 8 can sequentially extrude the piston structures 6 along with the rotation of the driving motor 9, and a sealing structure 10 is further arranged between the driving motor 9 and the shell 1.

Further, the eccentric driving member 8 comprises an eccentric wheel 83, a lever 82 and a connecting rod 81, the lower end of the eccentric wheel 83 is connected with the output end of the driving motor 9, the upper end of the eccentric wheel 83 is connected with the connecting rod 81 through the lever 82, and the connecting rod 81 is sleeved outside the piston structure 6.

Further, in order to obtain better pumping effect, the piston structure 6 is a five-cylinder piston.

Further, in order to realize that the check valve structure 4 comprises an umbrella valve 41 and an air inlet flap valve 42, the umbrella valve 41 is arranged corresponding to the inner cavity of the piston structure 6, and the air inlet flap valve 42 communicates the air inlet bin 7 and the air outlet chamber 5.

Further, in order to obtain better air tightness, the sealing structure 10 is an oil seal capable of sealing a gap between the output shaft of the driving motor 9 and the housing 1.

Further, a contraction spring is arranged in the oil seal. The motor shaft is installed on the shell 1 through the bearing, and excellent sealing performance can be kept after the gap between the motor shaft and the bearing is enlarged, so that the performance, service life and stability of the product are improved.

The assembly surfaces of all the components of the embodiment are provided with sealing lines matched with the sealing grooves, so that the sealing device can keep better sealing performance after being used for a long time and in various complex environments.

This embodiment increases the oil blanket on motor output shaft, goes up because the leakproofness of oil blanket between motor shaft and the casing, and the storehouse of admitting air can effectively form the vacuum storehouse, uses and also can keep better leakproofness in various complex environment for a long time.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the description of the attached drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the machines, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or through an intermediary, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Claims

1. A five-cylinder piston vacuum pump is characterized by comprising a shell, a pump nozzle, an air inlet nozzle, a one-way valve structure, a piston structure, an eccentric driving piece and a driving motor, wherein the pump nozzle is arranged on the top surface of the shell, the air inlet nozzle is arranged at the lower end of the shell, a valve frame and a piston frame are arranged in the shell from top to bottom, the valve frame is provided with the one-way valve structure, an air outlet chamber is formed between the pump nozzle and the one-way valve structure, the piston structure is arranged on the piston frame, an air inlet bin is formed between the outer part of the piston structure and the shell and is communicated with the air inlet nozzle, the one-way valve structure can enable air to pass through the air inlet bin to the air outlet chamber in a single direction, the lower end of the piston structure is also provided with the eccentric driving piece which is connected with the driving motor arranged at the lower end of the shell, and the eccentric driving piece can sequentially extrude the piston structure along with the rotation of the driving motor, and a sealing structure is arranged between the driving motor and the shell.

2. The five-cylinder piston vacuum pump as claimed in claim 1, wherein the eccentric driving member comprises an eccentric wheel, a lever and a connecting rod, the lower end of the eccentric wheel is connected with the output end of the driving motor, the upper end of the eccentric wheel is connected with the connecting rod through the lever, and the connecting rod is sleeved outside the piston structure.

3. A five-cylinder piston vacuum pump according to claim 2, wherein the piston arrangement is a five-cylinder piston.

4. The five-cylinder piston vacuum pump according to claim 1, wherein the one-way valve structure comprises an umbrella valve and an air inlet flap valve, the umbrella valve is arranged corresponding to the inner cavity of the piston structure, and the air inlet flap valve is communicated with the air inlet bin and the air outlet chamber.

5. A five-cylinder piston vacuum pump according to claim 1, wherein the sealing structure is an oil seal capable of sealing a gap between an output shaft of the drive motor and the housing.

6. A five-cylinder piston vacuum pump according to claim 5, wherein a retraction spring is provided within the oil seal.