CN214248334U

CN214248334U - Butterfly valve sealing structure

Info

Publication number: CN214248334U
Application number: CN202120245419.9U
Authority: CN
Inventors: 刘�文; 项光轮; 魏辉
Original assignee: Zhejiang Zhongxin Valve Co ltd
Current assignee: Zhejiang Zhongxin Valve Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-21
Anticipated expiration: 2031-01-28

Abstract

The utility model discloses a butterfly valve sealing structure, which belongs to the butterfly valve field, and comprises a valve body, a valve rod is connected in the valve body, a valve plate is fixedly connected at the outer end of the valve rod, the valve plate is positioned in the valve body, a turntable is fixedly connected at the upper end of the valve rod, the turntable is positioned at the upper side of the valve body, two pairs of rubber plates are rotatably connected with the inner wall of the valve body, the two pairs of rubber plates are respectively positioned at the upper side and the lower side of the valve plate, a second magnetic block is fixedly connected in the two pairs of rubber plates, two inflation holes are chiseled in the valve body, the two inflation holes are positioned at the two sides of the valve rod, a pressing rod is slidably connected in the two inflation holes, the pressing rod is positioned at the lower side of the turntable, a piston block is fixedly connected at the lower end of the pressing rod, a first magnetic block is slidably connected in the two inflation holes, a clapboard is arranged at the outer side of the valve plate after the valve is opened, double isolation can be carried out when the valve plate sealing ring is closed after being worn, thereby enhancing the sealing performance of the valve.

Description

Butterfly valve sealing structure

Technical Field

The utility model relates to a butterfly valve field, more specifically say, relate to a butterfly valve 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.

In the prior art, the butterfly valve has various types of fluid flowing after being opened, and the sealing ring of the valve plate can be corroded or abraded, so that the flowing fluid cannot be blocked after the valve is closed, and the working efficiency is influenced.

Disclosure of Invention

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a butterfly valve seal structure can realize opening the back at the valve, is equipped with the baffle in the outside of valve plate, can carry out two isolations when closing after the valve plate sealing washer receives wearing and tearing to this leakproofness of strengthening the valve.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A butterfly valve sealing structure comprises a valve body, wherein a valve rod is connected with the valve body in a threaded manner, a valve plate is fixedly connected to the outer end of the valve rod, the valve plate is positioned in the valve body, a rotary disc is fixedly connected to the upper end of the valve rod, the rotary disc is positioned on the upper side of the valve body, two pairs of rubber plates are rotatably connected to the inner wall of the valve body and are respectively positioned on the upper side and the lower side of the valve plate, second magnetic blocks are fixedly connected to the inner sides of the two pairs of rubber plates, two inflation holes are formed in the valve body and are positioned on the two sides of the valve rod, pressing rods are slidably connected to the two inflation holes and are positioned on the lower side of the rotary disc, a piston block is fixedly connected to the lower ends of the pressing rods, first magnetic blocks are slidably connected to the two inflation holes and are positioned on the upper side of the second magnetic blocks, and a spring is fixedly connected between the first magnetic blocks and the left inner wall of the inflation holes, the spring is located the gas charging hole, can realize opening the back at the valve, is equipped with the baffle in the outside of valve plate, can carry out two isolations when closing after the valve plate sealing washer receives wearing and tearing to this leakproofness of strengthening the valve.

Further, two inflation hole inner wall fixedly connected with spacing ring, and the spacing ring is located the piston piece upside, carries on spacingly to its position when the piston piece kick-backs, and it is too big to reduce the gas in the inflation hole to piston piece thrust for it produces the striking to the carousel to pop out the inflation hole according to the depression bar, makes it receive wearing and tearing, increase cost.

Further, first magnetic path outer end fixedly connected with sheet rubber, the sheet rubber contacts with aerifing the downthehole wall, separates with the clearance that aerifys downthehole wall and produce when aerifing first magnetic path sliding connection, makes to aerify the downthehole gas and be difficult for passing first magnetic path, reduces the air that aerifys downthehole and circulates the air vent through first magnetic path.

Furthermore, two aerify downthehole wall fixedly connected with stopper, the stopper is located first magnetic path rear end, restricts the position after the air in aerifing the hole produces thrust to first magnetic path, reduces the position after first magnetic path slides too much for the air of first magnetic path front end leaks from the air vent.

Furthermore, two air vents are formed in the outer end of the valve body and located on the outer wall of the inflation hole and communicated with the inflation hole, pressure generated when the first magnetic block is pushed backwards is reduced, and the first magnetic block is smooth when sliding.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme can realize opening the back at the valve, is equipped with the baffle in the outside of valve plate, can carry out two isolations when closing after the valve plate sealing washer receives wearing and tearing to this leakproofness of strengthening the valve.

(2) Two inflation hole inner walls fixedly connected with spacing rings, and the spacing ring is located the piston piece upside, carries on spacingly to its position when the piston piece kick-backs, and it is too big to piston piece thrust to reduce the gas in the inflation hole for pop out the inflation hole and produce the striking to the carousel according to the pressure lever, make it receive wearing and tearing, increase cost.

(3) First magnetic path outer end fixedly connected with sheet rubber, the sheet rubber contacts with aerifing the downthehole wall, separates with the clearance that aerifys downthehole wall and produce when first magnetic path sliding connection, makes to aerify gaseous difficult first magnetic path of passing in the hole, reduces the air that aerifys downthehole and circulates the air vent through first magnetic path.

(4) The inner walls of the two inflation holes are fixedly connected with limiting blocks, the limiting blocks are located at the rear ends of the first magnetic blocks, the positions of the air in the inflation holes after thrust is generated on the first magnetic blocks are limited, the positions of the air after the first magnetic blocks slide are reduced too much, and the air at the front ends of the first magnetic blocks is made to leak from the air vents.

(5) Two air vents are formed in the outer end of the valve body and are located on the outer wall of the inflation hole and communicated with the inflation hole, pressure generated when the first magnetic block is pushed backwards is reduced, and the first magnetic block is smooth when sliding.

Drawings

Fig. 1 is a schematic front structural view of the present invention;

fig. 2 is a schematic sectional structure of the present invention;

fig. 3 is a schematic structural diagram of a in fig. 2.

The reference numbers in the figures illustrate:

the pneumatic valve comprises a valve body 1, a valve rod 2, a valve plate 3, a rotary table 4, a rubber plate 5, an inflation hole 6, a 602 limiting block, a 603 ventilation hole, a pressing rod 7, a piston block 8, a first magnetic block 9, a rubber sheet 901, a spring 10 and a second magnetic block 11.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, a butterfly valve sealing structure comprises a valve body 1, a valve rod 2 is connected to the valve body 1 through an internal thread, a valve plate 3 is fixedly connected to the outer end of the valve rod 2, the valve plate 3 is positioned in the valve body 1, a rotary disc 4 is fixedly connected to the upper end of the valve rod 2, the rotary disc 4 is positioned on the upper side of the valve body 1, two pairs of rubber plates 5 are rotatably connected to the inner wall of the valve body 1, the two pairs of rubber plates 5 are respectively positioned on the upper side and the lower side of the valve plate 3, second magnetic blocks 11 are fixedly connected to the two pairs of rubber plates 5, two air charging holes 6 are chiseled in the valve body 1, the two air charging holes 6 are positioned on the two sides of the valve rod 2, a pressing rod 7 is slidably connected to the two air charging holes 6, the pressing rod 7 is positioned on the lower side of the rotary disc 4, a piston block 8 is fixedly connected to the lower end of the pressing rod 7, a first magnetic block 9 is slidably connected to the two air charging holes 6, the first magnetic block 9 is positioned on the upper side of the second magnetic block 11, a spring 10 is fixedly connected between the first magnetic block 9 and the left inner wall of the air charging hole 6, the spring 10 is located in the inflation hole 6, so that a partition plate is arranged on the outer side of the valve plate after the valve is opened, and double isolation can be performed when the valve plate sealing ring is closed after being abraded, so that the sealing performance of the valve is enhanced.

Referring to fig. 2-3, the inner walls of the two air-charging holes 6 are fixedly connected with a limiting ring, and the limiting ring is located on the upper side of the piston block 8, so as to limit the position of the piston block 8 when the piston block 8 rebounds, and reduce the excessive thrust of the air in the air-charging holes 6 on the piston block 8, so that the pressing rod 7 ejects the air-charging holes 6 to impact the turntable 4, so that the turntable 4 is worn and the cost is increased, the outer end of the first magnetic block 9 is fixedly connected with a rubber sheet 901, the rubber sheet 901 contacts with the inner wall of the air-charging holes 6, and separates the gap generated by the sliding connection of the first magnetic block 9 and the inner wall of the air-charging holes 6, so that the air in the air-charging holes 6 is not easy to pass through the first magnetic block 9, so as to reduce the air in the air-charging holes 6 from passing through the air vents 603 through the first magnetic block 9, the inner walls of the two air-charging holes 6 are fixedly connected with limiting blocks 602, the limiting block 602 is located at the rear end of the first magnetic block 9, so as to limit the position of the air-charging holes 6 after the thrust is generated on the first magnetic block 9, the position of the first magnetic block 9 after sliding is reduced too much, so that air at the front end of the first magnetic block 9 leaks from the vent holes 603, two vent holes 603 are formed in the outer end of the valve body 1, the two vent holes 603 are located on the outer wall of the inflation hole 6 and are communicated with the inflation hole 6, the pressure generated when the first magnetic block 9 is pushed backwards is reduced, and the first magnetic block 9 is enabled to be smoother when sliding.

The operator is using the utility model discloses in, drive valve rod 2 and rotate after carousel 4 rotates, make valve plate 3 extrude rubber slab 5, when carousel 4 rotates downwards, push down according to pressure bar 7, make the air in inflating hole 6 promote first magnetic path 9, make rubber slab 5 of 3 upsides of valve plate attract with first magnetic path 9 when receiving the elasticity when extruding, when closing valve plate 3, the air in inflating hole 6 is kick-backed, make first magnetic path 9 pull-back and rubber slab 5 break away from the attraction, make rubber slab 5 of both sides about valve plate 3 carry out the closure, compared with prior art, the utility model discloses can realize opening the back at the valve, be equipped with the baffle in the outside of valve plate, can carry out two isolations when closing after the valve plate sealing washer receives wearing and tearing, strengthen the leakproofness of valve with this.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a butterfly valve seal structure, includes valve body (1), its characterized in that: the valve body (1) is internally connected with a valve rod (2), the outer end of the valve rod (2) is fixedly connected with a valve plate (3), the valve plate (3) is positioned in the valve body (1), the upper end of the valve rod (2) is fixedly connected with a turntable (4), the turntable (4) is positioned at the upper side of the valve body (1), the inner wall of the valve body (1) is rotatably connected with two pairs of rubber plates (5), the two pairs of rubber plates (5) are respectively positioned at the upper side and the lower side of the valve plate (3), the rubber plates (5) are fixedly connected with a second magnetic block (11), two inflation holes (6) are arranged in the valve body (1), the two inflation holes (6) are positioned at the two sides of the valve rod (2), the two inflation holes (6) are internally connected with a pressing rod (7) in a sliding manner, the pressing rod (7) is positioned at the lower side of the turntable (4), the lower end of the pressing rod (7) is fixedly connected with a piston block (8), two inflation hole (6) sliding connection has first magnetic path (9), first magnetic path (9) are located the upside of second magnetic path (11), fixedly connected with spring (10) between first magnetic path (9) and inflation hole (6) inner wall, spring (10) are located inflation hole (6).

2. A butterfly valve sealing structure according to claim 1, wherein: two the inner wall fixedly connected with spacing ring of gas charging hole (6), and the spacing ring is located piston block (8) upside.

3. A butterfly valve sealing structure according to claim 1, wherein: the outer end of the first magnetic block (9) is fixedly connected with a rubber sheet (901), and the rubber sheet (901) is in contact with the inner wall of the inflation hole (6).

4. A butterfly valve sealing structure according to claim 1, wherein: two inflation hole (6) inner wall fixedly connected with stopper (602), stopper (602) are located first magnetic path (9) rear end.

5. A butterfly valve sealing structure according to claim 1, wherein: two vent holes (603) are formed in the outer end of the valve body (1) in a chiseled mode, and the two vent holes (603) are located on the outer wall of the inflating hole (6) and are communicated with the inflating hole (6).