CN210372057U

CN210372057U - Butterfly valve with double-seal structure

Info

Publication number: CN210372057U
Application number: CN201921558244.6U
Authority: CN
Inventors: 盛明铭; 刘军; 童富泉
Original assignee: Hangzhou Fischer Technology Co ltd
Current assignee: Hangzhou Fischer Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-04-21
Anticipated expiration: 2029-09-19

Abstract

The utility model discloses a butterfly valve with double seal structure, including valve body and rotation shell, the inside of valve body is provided with the valve clack, and all installs sealing spring in both sides around the valve clack, sealing spring's inside is run through there is the spacer pin, sealing spring keeps away from one side of valve clack and installs the preforming, and the preforming keeps away from one side of sealing spring and install the rubber pad, the inside of valve clack is run through there is the valve rod, and installs the sealing rubber circle in the top of valve rod, the oil circulating pump is installed to the front end of valve body top, and one side of oil circulating pump installs the oil extraction pipe, the connecting pipe is installed to oil circulating pump's opposite side. This butterfly valve with double seal structure is provided with the sealing rubber circle, and the sealing rubber circle can effectually compensate the clearance between valve rod and the valve body, can obtain double-deck sealed for the clearance between valve rod and the valve body for the sealing rubber circle can the inside lubricating liquid of effectual sealing butterfly valve.

Description

Butterfly valve with double-seal structure

Technical Field

The utility model relates to a butterfly valve technical field specifically is a butterfly valve with double seal structure.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

The existing butterfly valve can not well compensate for the gap between the butterfly valve and the connecting pipeline in the using process, the joint is easy to leak, the sealing effect provided by lubricating oil can not be good, stable lubrication and cooling treatment can not be provided for the components inside the butterfly valve well, the using requirements of people can not be well met, and technical innovation can be carried out on the basis of the existing butterfly valve according to the condition.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a butterfly valve with double seal structure to propose current butterfly valve in solving above-mentioned background art in the use, the clearance between compensation butterfly valve and the connecting tube that can not be fine, the junction takes place easily to leak, and the sealed utility that provides for lubricating oil that can not be fine, and the not fine subassembly for butterfly valve inside provides stable lubrication and cooling and handles, the not fine user demand problem of satisfying people that can not be fine.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a butterfly valve with double seal structure, includes the valve body and rotates the shell, the inside of valve body is provided with the valve clack, and all installs sealing spring in both sides around the valve clack, sealing spring's inside is run through there is the spacer pin, sealing spring keeps away from one side of valve clack and installs the preforming, and the preforming keeps away from one side of sealing spring and install the rubber pad, the inside of valve clack is run through there is the valve rod, and installs the sealing rubber circle in the top of valve rod, the circulating oil pump is installed to the front end of valve body top, and installs the oil drain pipe in one side of circulating oil pump, the connecting pipe is installed to the opposite side of circulating oil pump, rotate the top of shell and install external grease chamber, and rotate the top that the shell.

Preferably, the outer surface of the pressing sheet is locally and tightly attached to the outer surface of the rubber pad, the pressing sheet and the valve body form an elastic structure through the matching between the sealing spring and the limiting pin, and the sealing spring and the limiting pin are uniformly distributed around the pressing sheet.

Preferably, the outer parts of the pressing sheet and the rubber pad are both in a circular ring-shaped structure, and the pressing sheet and the rubber pad are symmetrically distributed around the central axis of the valve body.

Preferably, be fixed connection between valve clack and the valve rod, and the valve rod runs through in the inside of sealing rubber circle to sealing rubber circle is provided with two.

Preferably, the external oil chamber forms a communicating structure with the rotating shell through a return pipe, and the rotating shell forms a communicating structure with the external oil chamber through cooperation among the circulating oil pump, the oil discharge pipe and the connecting pipe.

Preferably, the rotating shell is fixedly connected with the valve body, and the inner wall size structure below the valve body is matched with the outer size structure of the valve clack.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model is provided with the pressing sheet, the sealing spring, the limiting pin and the rubber pad, when external force acts on the pressing sheet, the pressing sheet compresses the sealing spring along the axis direction of the limiting pin, and the pressing sheet and the external pipeline clamp the rubber pad under the action of the sealing spring, so that the rubber pad makes up the gap between the butterfly valve and the external pipeline, the connection between the butterfly valve and the pipeline is sealed, and the butterfly valve is sealed in two directions due to the symmetrical distribution of the rubber pad;

2. the utility model is provided with two sealing rubber rings which can effectively compensate the clearance between the valve rod and the valve body, and can obtain double-layer sealing for the clearance between the valve rod and the valve body, so that the sealing rubber rings can effectively seal the lubricating liquid in the butterfly valve, reduce the loss of the lubricating liquid and efficiently utilize the lubricating liquid;

3. the utility model discloses be provided with the circulating oil pump, arrange oil pipe and connecting pipe, utmost point love is high lubricating oil and is guided into the inside of rotating the shell along the inside of back flow for lubricating oil can the inside subassembly of effectual lubricated rotation shell, and reduce the temperature of subassembly, and under the effect of circulating oil pump, can flow back the inside of external grease chamber along the inside of arranging oil pipe and connecting pipe with the inside lubricating oil of rotating the shell, make lubricating oil can obtain cyclic utilization, and can wash the inside subassembly of rotating the shell.

Drawings

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

FIG. 2 is a schematic view of a partial sectional structure of the valve body of the present invention;

fig. 3 is a schematic view of the sectional structure of the pressing sheet of the present invention.

In the figure: 1. a valve body; 2. tabletting; 3. a rubber pad; 4. a valve flap; 5. a circulating oil pump; 6. an oil discharge pipe; 7. a return pipe; 8. an external oil chamber; 9. a connecting pipe; 10. rotating the housing; 11. a valve stem; 12. sealing the rubber ring; 13. a seal spring; 14. and a limiting pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a butterfly valve with a double-seal structure comprises a valve body 1 and a rotating shell 10, wherein a valve clack 4 is arranged inside the valve body 1, seal springs 13 are arranged on the front side and the rear side of the valve clack 4, a limit pin 14 penetrates through the inside of the seal springs 13, the outer surface of a pressing sheet 2 is locally and tightly attached to the outer surface of a rubber pad 3, the pressing sheet 2 forms an elastic structure with the valve body 1 through the matching between the seal springs 13 and the limit pin 14, the seal springs 13 and the limit pin 14 are uniformly distributed along the periphery of the pressing sheet 2, when a user connects the butterfly valve with an external pipeline, the external pipeline compresses the rubber pad 3 at the moment, so that external force acts on the pressing sheet 2, the pressing sheet 2 compresses the seal springs 13 along the central axis direction of the limit pin 14, the pressing sheet 2 and the external pipeline clamp the rubber pad 3 under the action of the seal springs 13, and the rubber pad, thereby the connection between the butterfly valve and the pipeline is sealed, and the rubber pads 3 are symmetrically distributed, so that the butterfly valve is sealed in two directions;

one side of a sealing spring 13, which is far away from a valve clack 4, is provided with a pressing sheet 2, one side of the pressing sheet 2, which is far away from the sealing spring 13, is provided with a rubber pad 3, the outsides of the pressing sheet 2 and the rubber pad 3 are both in a circular ring structure, the pressing sheet 2 and the rubber pad 3 are both symmetrically distributed about the central axis of a valve body 1, a valve rod 11 penetrates through the inside of the valve clack 4, a sealing rubber ring 12 is arranged above the valve rod 11, the valve clack 4 is fixedly connected with the valve rod 11, the valve rod 11 penetrates through the inside of the sealing rubber ring 12, the two sealing rubber rings 12 are arranged, the gap between the valve rod 11 and the valve body 1 can be effectively formed by the two sealing rubber rings 12, double-layer sealing can be achieved for the gap between the valve rod 11 and the valve body 1, so that the sealing rubber, so that the lubricating liquid can be efficiently utilized;

the front end above the valve body 1 is provided with a circulating oil pump 5, one side of the circulating oil pump 5 is provided with an oil discharge pipe 6, the other side of the circulating oil pump 5 is provided with a connecting pipe 9, an external oil chamber 8 is arranged above a rotating shell 10, the rotating shell 10 is positioned above the circulating oil pump 5, the external oil chamber 8 forms a communicating structure with the rotating shell 10 through a return pipe 7, the rotating shell 10 forms a communicating structure with the external oil chamber 8 through the cooperation among the circulating oil pump 5, the oil discharge pipe 6 and the connecting pipe 9, a user can introduce lubricating oil into the internal part of the external oil chamber 8, so that the lubricating oil is introduced into the internal part of the rotating shell 10 along the internal part of the return pipe 7, the lubricating oil can effectively lubricate the internal components of the rotating shell 10, the temperature of the components is reduced, and under the action of the circulating oil pump 5, the lubricating oil in the rotating shell 10 can flow back to the internal part, so that the lubricating oil can be recycled and the components in the rotating shell 10 can be cleaned;

the rotary shell 10 is fixedly connected with the valve body 1, the inner wall size structure below the valve body 1 is matched with the outer size structure of the valve clack 4, and a return pipe 7 is installed on one side of the external oil chamber 8.

The working principle is as follows: when the butterfly valve with the double-sealing structure is used, firstly, when a user connects the butterfly valve with an external pipeline, the external pipeline compresses the rubber gasket 3 at the moment, so that external force acts on the pressing sheet 2, the pressing sheet 2 compresses the sealing spring 13 along the central axis direction of the limiting pin 14, the pressing sheet 2 and the external pipeline clamping rubber gasket 3 are obtained, the rubber gasket 3 makes up the gap between the butterfly valve and the external pipeline, and the connection between the butterfly valve and the pipeline is sealed;

secondly, the sealing rubber ring 12 can effectively seal the lubricating liquid in the butterfly valve, and reduce the loss of the lubricating liquid;

finally, the user can be with the inside of the leading-in external grease chamber 8 of lubricating oil for lubricating oil is along the inside of back flow pipe 7 leading-in to the inside of rotating shell 10, makes lubricating oil can the inside subassembly of effectual lubricated rotation shell 10, then, starts circulating oil pump 5, can return the inside lubricating oil of rotating shell 10 to the inside of external grease chamber 8 along the inside of oil extraction pipe 6 and connecting pipe 9, and wherein, circulating oil pump 5's model is NKP, and this is exactly the theory of operation of this butterfly valve with double seal structure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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. A butterfly valve with a double seal structure, comprising a valve body (1) and a rotary housing (10), characterized in that: the internal of the valve body (1) is provided with a valve clack (4), sealing springs (13) are installed on the front side and the rear side of the valve clack (4), a limiting pin (14) penetrates through the internal of the sealing springs (13), a pressing sheet (2) is installed on one side, away from the valve clack (4), of each sealing spring (13), a rubber pad (3) is installed on one side, away from each sealing spring (13), of each pressing sheet (2), a valve rod (11) penetrates through the internal of the valve clack (4), a sealing rubber ring (12) is installed above each valve rod (11), a circulating oil pump (5) is installed at the front end above the valve body (1), an oil discharge pipe (6) is installed on one side of the circulating oil pump (5), a connecting pipe (9) is installed on the other side of the circulating oil pump (5), an external oil chamber (8) is installed above a rotating shell (10), and the rotating shell (10, and a return pipe (7) is arranged on one side of the external oil chamber (8).

2. A butterfly valve with a double seal structure according to claim 1, wherein: the outer surface of the pressing piece (2) is tightly attached to the outer surface of the rubber pad (3) locally, the pressing piece (2) forms an elastic structure with the valve body (1) through the matching between the sealing spring (13) and the limiting pin (14), and the sealing spring (13) and the limiting pin (14) are uniformly distributed around the pressing piece (2).

3. A butterfly valve with a double seal structure according to claim 1, wherein: the outside of preforming (2) and rubber pad (3) all is the ring annular structure, and all distributes about the axis symmetry of valve body (1) between preforming (2) and rubber pad (3).

4. A butterfly valve with a double seal structure according to claim 1, wherein: be fixed connection between valve clack (4) and valve rod (11), and valve rod (11) run through in the inside of sealing rubber circle (12) to sealing rubber circle (12) are provided with two.

5. A butterfly valve with a double seal structure according to claim 1, wherein: the external oil chamber (8) is communicated with the rotating shell (10) through a return pipe (7), and the rotating shell (10) is communicated with the external oil chamber (8) through the cooperation among the circulating oil pump (5), the oil discharge pipe (6) and the connecting pipe (9).

6. A butterfly valve with a double seal structure according to claim 1, wherein: the rotary shell (10) is fixedly connected with the valve body (1), and the inner wall size structure below the valve body (1) is matched with the outer size structure of the valve clack (4).