CN215633615U

CN215633615U - Air leakage prevention structure of mechanical vacuum pump

Info

Publication number: CN215633615U
Application number: CN202121484635.5U
Authority: CN
Inventors: 张云伟
Original assignee: Ningbo Zhongnan Lianchuang Technology Co ltd
Current assignee: Ningbo Zhongnan Lianchuang Technology Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-01-25
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses an air leakage preventing structure of a mechanical vacuum pump, which comprises an exhaust pipe, wherein two ends of the exhaust pipe are respectively and integrally connected with an inner communicating pipe, two ends of the exhaust pipe are respectively and rotatably provided with a connecting end head, and the connecting end heads are arranged outside the inner communicating pipes. This mechanical vacuum pump leak protection gas structure, through connecting end and an interconnection siphunculus of body coupling of rotatory installation respectively at the both ends of blast pipe, consequently can insert the inside of outside pipeline with the interconnection siphunculus, and with the outside of connecting end threaded connection outside pipeline, sealed end is firmly supported on the terminal surface of outside pipeline under the effect of first spring this moment, can utilize sealed end to block up the gap of this structure and outside pipeline junction, the effectual effect of leak protection gas that has played, first spring can make sealed end support on the terminal surface of outside pipeline all the time simultaneously, and then can effectually avoid the phenomenon of the junction gas leakage that sealing material expend with heat and contract with cold and lead to.

Description

Air leakage prevention structure of mechanical vacuum pump

Technical Field

The utility model relates to the technical field of air leakage prevention of mechanical vacuum pumps, in particular to an air leakage prevention structure of a mechanical vacuum pump.

Background

Mechanical vacuum pump as the name implies means, and an evacuation equipment that extracts air through mechanical structure's operation when operating external equipment evacuation, need guarantee the sealing performance of vacuum pump and outside pipe connection department, avoids the unable effectual clear of evacuation operation.

However, when the conventional vacuum pump is used for vacuum pumping, the joint between the conventional vacuum pump and the external device has no firm and efficient air leakage prevention structure, and the overall air leakage prevention performance needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air leakage prevention structure of a mechanical vacuum pump, and aims to solve the technical problems that the connection part of the existing vacuum pump and external equipment is not provided with a firm and efficient air leakage prevention structure during vacuum pumping operation, and the whole air leakage prevention performance needs to be improved in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a mechanical vacuum pump leak protection gas structure, includes the blast pipe, the both ends of blast pipe are an organic whole respectively and are connected with an in-connection siphunculus, the both ends of blast pipe are rotatory respectively and are installed a connection end, the outside of in-connection siphunculus is arranged in to the connection end, the outside slidable mounting of in-connection siphunculus has sealed end, first spring has been cup jointed to the outside of in-connection siphunculus, the one end of first spring is supported on the surface of first spring, the other end of first spring supports on the surface of communicating pipe side surface upper fixing block including on.

Preferably, a check valve is installed in the pipeline of the exhaust pipe, an air inlet pipe is integrally connected to the side surface of the exhaust pipe, and an air inlet valve is fixedly installed at the air inlet end of the air inlet pipe.

Preferably, the air inlet pipe is located at a position close to an air inlet port of the exhaust pipe, and the check valve is located at a position close to an exhaust port of the exhaust pipe.

Preferably, an organic whole is connected with the guide inner tube on the inner wall of check valve inlet port department, two gag lever posts of fixedly connected with on the inside terminal surface of check valve, the outside sliding connection of gag lever post has the dog, the dog is located the gas outlet port department of guide inner tube.

Preferably, one end fixedly connected with stopper of gag lever post, fixedly connected with second spring on the surface of one side of stopper, the other end of second spring supports on the surface of dog.

Preferably, the connection end at the exhaust pipe air inlet port is in threaded connection with the air outlet pipe port of external equipment, the sealing end abuts against the end face of the external pipeline, and the internal communicating pipe is arranged inside the external pipeline.

Preferably, the connecting end at the exhaust pipe gas outlet port is in threaded connection with the gas inlet port of the vacuum pump.

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

1. this mechanical vacuum pump leak protection gas structure, through connecting end and an interconnection siphunculus of body coupling of rotatory installation respectively at the both ends of blast pipe, consequently can insert the inside of outside pipeline with the interconnection siphunculus, and with the outside of connecting end threaded connection outside pipeline, sealed end is firmly supported on the terminal surface of outside pipeline under the effect of first spring this moment, can utilize sealed end to block up the gap of this structure and outside pipeline junction, the effectual effect of leak protection gas that has played, first spring can make sealed end support on the terminal surface of outside pipeline all the time simultaneously, and then can effectually avoid the phenomenon of the junction gas leakage that sealing material expend with heat and contract with cold and lead to.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a schematic diagram of the A-A analysis of the present invention.

In the figure: 1. an exhaust pipe; 2. an air inlet pipe; 3. an intake valve; 4. a one-way valve; 5. connecting the end heads; 6. an inner communicating pipe; 7. sealing the end head; 8. a limiting block; 9. a first spring; 10. a guide inner tube; 11. a limiting rod; 12. a stopper; 13. a second spring.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an air leakage prevention structure of a mechanical vacuum pump comprises an exhaust pipe 1, wherein two ends of the exhaust pipe 1 are respectively and integrally connected with an inner communicating pipe 6, two ends of the exhaust pipe 1 are respectively and rotatably provided with a connecting end 5, the connecting end 5 is arranged outside the inner communicating pipe 6, the outer part of the inner communicating pipe 6 is provided with a sealing end 7 in a sliding manner, the outer part of the inner communicating pipe 6 is sleeved with a first spring 9, one end of the first spring 9 is propped against the outer surface of the first spring 9, the other end of the first spring 9 is propped against the outer surface of a fixed block on the side surface of the inner communicating pipe 6, the connecting end 5 at the air inlet port of the exhaust pipe 1 is in threaded connection with the air outlet port of an external device, the sealing end 7 is propped against the end surface of an external pipeline, the inner communicating pipe 6 is arranged inside the external pipeline, and the connecting end 5 at the air outlet of the exhaust pipe 1 is in threaded connection with the air inlet port of the vacuum pump, wherein through the both ends at blast pipe 1 respectively rotatory connection end 5 of installation and internal connection siphunculus 6 of a body coupling, consequently can insert the inside of outside pipeline with internal connection siphunculus 6, and will connect the outside of 5 threaded connection at outside pipeline of end, sealed end 7 is firmly supported on the terminal surface of outside pipeline under the effect of first spring 9 this moment, can utilize sealed end 7 to block up the gap of this structure and outside pipeline junction, the effectual effect of leak protection gas that has played, first spring 9 can make sealed end 7 support on the terminal surface of outside pipeline all the time simultaneously, and then can effectually avoid the phenomenon of the junction gas leakage that sealing material expend with heat and contract with cold and lead to.

Referring to fig. 1, a check valve 4 is installed in a pipeline of an exhaust pipe 1, an air inlet pipe 2 is integrally connected to a side surface of the exhaust pipe 1, an air inlet valve 3 is fixedly installed at an air inlet end of the air inlet pipe 2, the air inlet pipe 2 is located near an air inlet port of the exhaust pipe 1, and the check valve 4 is located near an exhaust port of the exhaust pipe 1.

Please refer to fig. 3, an inner guiding tube 10 is integrally connected to an inner wall at an air inlet of the check valve 4, two limiting rods 11 are fixedly connected to an inner end surface of the check valve 4, a stop 12 is slidably connected to an outer portion of the limiting rods 11, the stop 12 is located at an air outlet of the inner guiding tube 10, a limiting block 8 is fixedly connected to one end of the limiting rod 11, a second spring 13 is fixedly connected to an outer surface of one side of the limiting block 8, and the other end of the second spring 13 abuts against an outer surface of the stop 12, so that the check valve 4 can be utilized to perform double air leakage prevention protection on the structure, and the air leakage prevention effect of the structure is further improved.

The working principle is as follows: firstly, the connecting end 5 at one end of the exhaust pipe 1 is connected to the outside of the pipeline of the external device, then the connecting end 5 at the other end of the exhaust pipe 1 is connected to the air inlet port of the vacuum pump, at this time, the first spring 9 is in a compressed state, and the sealing end 7 is tightly abutted to the end surface of the external pipeline, thereby effectively avoiding the phenomenon of air leakage at the gap at the connection part of the external pipeline and the structure, at this time, the vacuum pump can perform air suction operation, further reducing the air pressure value at one side of the stopper 12, at this time, the stopper 12 is pushed open by the air at the other side of the stopper 12 in a high pressure state, the second spring 13 is compressed, the air passes through the one-way valve 4 and is discharged from the vacuum pump, during the whole vacuum pumping operation, once the air pressure values at the two sides of the stopper 12 are close, the second spring 13 pushes the stopper 12 to move and abuts to the port of the guiding inner pipe 10, thereby effectively avoiding the air backflow in the pipeline, when the inside atmospheric pressure value of external equipment needs to be resumeed after the evacuation operation is accomplished, can open air inlet valve 3, utilize inside intake pipe 2 comes the leading-in external equipment of outside air, the simple operation is high-efficient.

In the embodiments of the present application, the descriptions of the directional terms such as "front", "back", "left" and "right" are only described according to the directions shown in the drawings shown in the present application, and are not limited to the scope of the claims of the present application, and in the specific implementation process, other similar or similar embodiments may be obtained by correspondingly modifying the embodiments according to the embodiments, and all of the embodiments are within the scope of the present application, and the descriptions of the other similar or similar embodiments are not repeated in the present application.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a mechanical vacuum pump leak protection gas structure, includes blast pipe (1), its characterized in that: the both ends of blast pipe (1) are an organic whole respectively and are connected with an in-connection siphunculus (6), the both ends of blast pipe (1) are rotatory respectively and are installed one and are connected end (5), connect end (5) and arrange the outside of in-connection siphunculus (6) in, the outside slidable mounting of in-connection siphunculus (6) has sealed end (7), first spring (9) have been cup jointed to the outside of in-connection siphunculus (6), the one end of first spring (9) supports on the surface of first spring (9), the other end of first spring (9) supports including on the surface of communicating pipe (6) side surface fixed block.

2. An air leakage preventing structure of a mechanical vacuum pump according to claim 1, characterized in that: install check valve (4) in the pipeline of blast pipe (1), an organic whole is connected with intake pipe (2) on the side surface of blast pipe (1), the air inlet end fixed mounting of intake pipe (2) has air inlet valve (3).

3. An air leakage preventing structure of a mechanical vacuum pump according to claim 2, characterized in that: intake pipe (2) are located nearly exhaust pipe (1) inlet port department, check valve (4) are located nearly exhaust pipe (1) exhaust port department.

4. An air leakage preventing structure of a mechanical vacuum pump according to claim 2, characterized in that: the air inlet valve is characterized in that a guide inner tube (10) is integrally connected to the inner wall of the air inlet port of the check valve (4), two limiting rods (11) are fixedly connected to the inner end face of the check valve (4), a stop block (12) is connected to the outer portion of each limiting rod (11) in a sliding mode, and the stop block (12) is located at the air outlet port of the guide inner tube (10).

5. An air leakage preventing structure of a mechanical vacuum pump according to claim 4, characterized in that: one end fixedly connected with stopper (8) of gag lever post (11), fixedly connected with second spring (13) on one side surface of stopper (8), the other end of second spring (13) supports on the surface of dog (12).

6. An air leakage preventing structure of a mechanical vacuum pump according to claim 1, characterized in that: connecting end (5) threaded connection at blast pipe (1) inlet port department is at the outlet duct port department of external equipment, sealed end (7) support on the terminal surface of external pipeline, the inside of external pipeline is arranged in interior siphunculus (6).

7. An air leakage preventing structure of a mechanical vacuum pump according to claim 1, characterized in that: the connecting end (5) at the air outlet of the exhaust pipe (1) is in threaded connection with the air inlet of the vacuum pump.