CN217927191U

CN217927191U - Triple sealing structure of butterfly valve

Info

Publication number: CN217927191U
Application number: CN202222268828.8U
Authority: CN
Inventors: 金宗林; 陈海军; 金繁荣
Original assignee: Jingjia Valve Group Co ltd
Current assignee: Jingjia Valve Group Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-29
Anticipated expiration: 2032-08-29

Abstract

The periphery of a butterfly plate is curved in the axial cross section of the butterfly plate, the surface where the curve is located forms a curved surface, an annular boss is arranged on the inner circumferential surface of a valve seat along the circumferential direction, the inner side surface of the boss is a conical surface, a first groove is arranged in the curved surface along the circumferential direction of the butterfly plate, a sealing ring is arranged in the first groove, a pressing ring is arranged on the end surface of the butterfly plate, a T-shaped sealing ring is arranged between the pressing ring and the butterfly plate, and second grooves used for mounting the T-shaped sealing ring are respectively arranged in the butterfly plate and the pressing ring. The utility model discloses have triple seal structure, have zero leakage function. The first sealing structure is a soft sealing structure formed by a T-shaped sealing ring and a boss, the second sealing structure is a hard sealing structure formed by a metal curved surface of a disc plate and the boss, and the third sealing structure is a soft sealing structure formed by the sealing ring and the boss. Multiple sealing and different sealing modes can be combined to meet various working condition requirements.

Description

Triple sealing structure of butterfly valve

Technical Field

The utility model relates to the field of machinary, especially, relate to valve, especially a triple seal structure of butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with a simple structure, can be used for controlling the opening and closing of a low-pressure pipeline medium, and a closing member (a valve clack or a butterfly plate) is a disc and rotates around a valve shaft to achieve opening and closing. Among the prior art, the soft seal butterfly valve reaches sealed effect because of the interference structure who adopts rubber seal and disk seat, but when the butterfly valve closed the pressurized, the butterfly plate warp easily and leads to the magnitude of interference to increase, and when the valve was opened moreover, frictional force between rubber seal and the disk seat was very big, after the switch number of times reached a certain amount, perhaps after the live time was longer, rubber seal began to tear or age, leads to the soft seal butterfly valve to leak.

Disclosure of Invention

An object of the utility model is to provide a triple seal structure of butterfly valve, triple seal structure of this kind of butterfly valve solve the technical problem that the butterfly valve among the prior art seals the effect not enough.

The utility model discloses a triple seal structure of butterfly valve, including valve body, disk seat and dish board, dish board and disk seat setting in the inner chamber of valve body, the dish board sets up in the disk seat, wears to be equipped with the valve rod in valve body, disk seat and the dish board, the periphery of dish board is the curve in its axial cross-section, the face at curve place constitute the curved surface, be provided with annular boss along the circumferencial direction on the inner circumference face of disk seat, the medial surface of boss is the conical surface, constitutes hard seal structure between curved surface and the boss inner circular conical surface, be provided with first slot along the circumferencial direction of dish board in the curved surface, be provided with the sealing washer in the first slot, the sealing washer constitutes soft seal structure with the conical surface of boss, be provided with the clamping ring on the terminal surface of dish board, be provided with T type sealing washer between clamping ring and the dish board, be provided with the second slot that is used for installing T type sealing washer in dish board and the clamping ring separately, the outer periphery of T type sealing washer constitutes soft seal structure with the conical surface of boss.

Furthermore, at least two through holes are uniformly formed in the end face of the pressing ring along the circumferential direction, a screw is respectively arranged in each through hole, and the pressing ring is fixed with the disc plate through the screws.

Furthermore, the sealing ring and the T-shaped sealing ring are both rubber rings.

Further, the curve is an arc or a parabola.

Compared with the prior art, the utility model, its effect is positive and obvious.

1. The three-layer sealing structure has a zero leakage function. The first sealing structure is a soft sealing structure formed by a T-shaped sealing ring and a boss, the second sealing structure is a hard sealing structure formed by a metal curved surface of a disc plate and the boss, and the third sealing structure is a soft sealing structure formed by the sealing ring and the boss.

2. 1) multiple sealing and different sealing mode combination can meet various working condition requirements; 2) The combination of long service life of hard seal and good sealing effect of soft seal enables the valve to realize the effects of long service life and low maintenance frequency, and is mainly used in places which are not easy to maintain the valve such as the field, the underground and the like and in air pipelines.

Drawings

Fig. 1 is a schematic view of the triple seal structure of the butterfly valve according to the present invention, along the axial direction of the butterfly plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, but the present invention is not limited to the examples, and all similar structures and similar variations of the present invention can be adopted to fall into the protection scope of the present invention. The utility model provides an upper and lower, preceding, back, left and right equidirectional use only for the description convenience, it is not right the technical scheme's of the utility model restriction.

As shown in fig. 1, the utility model discloses a triple seal structure of butterfly valve, including valve body 3, disk seat 10 and disk plate 1, disk plate 1 and disk seat 10 set up in the inner chamber of valve body 3, disk plate 1 sets up in disk seat 10, wear to be equipped with valve rod 2 in valve body 3, disk seat 10 and the disk plate 1, the periphery of disk plate 1 is the curve in its axial cross-section, the face that the curve was located constitute curved surface 4, be provided with annular boss 6 along the circumferencial direction on the inner circumferential surface of disk seat 10, the medial surface of boss 6 is the conical surface, constitutes hard seal structure between curved surface 4 and the boss 6 internal conical surface, be provided with first slot along the circumferencial direction of disk plate 1 in the curved surface 4, be provided with sealing washer 5 in the first slot, sealing washer 5 constitutes soft seal structure with the conical surface of boss 6, be provided with clamping ring 8 on the terminal surface of disk plate 1, be provided with T type sealing washer 7 between clamping ring 8 and the disk plate 1, be provided with the second slot that is used for installing T type sealing washer 7 separately in disk plate 1 and the clamping ring 8, the outer peripheral surface of T type sealing washer 7 constitutes soft seal structure with boss 6.

Furthermore, at least two through holes are uniformly formed in the end face of the pressing ring 8 along the circumferential direction, a screw 9 is respectively arranged in each through hole, and the pressing ring 8 is fixed with the disc plate 1 through the screw 9.

Further, the sealing ring 5 and the T-shaped sealing ring 7 are both rubber rings.

Further, the curve is an arc or a parabola.

Specifically, the valve body 3, the valve seat 10, the disc plate 1, the valve rod 2, and the like in this embodiment all adopt known solutions in the prior art, and those skilled in the art will know the solutions, and will not be described herein again.

The utility model has the advantages that:

1. has triple sealing structure and zero leakage function. The first sealing structure is a soft sealing structure formed by a T-shaped sealing ring 7 and a boss 6, the second sealing structure is a hard sealing structure formed by a metal curved surface 4 of the disc plate 1 and the boss 6, and the third sealing structure is a soft sealing structure formed by a sealing ring 5 and the boss 6.

A rubber sealing ring 5 is vulcanized in a first groove of a metal curved surface 4 of the butterfly plate 1 to form soft and hard double sealing, and a T-shaped sealing ring 7 is fixed on the butterfly plate 1 by a pressing ring 8 to form soft sealing.

The utility model discloses a manufacturing process: d507Mo is overlaid at the position of the metal curved surface 4 of the butterfly plate 1 and is processed into a smooth curved surface 4, a first groove is formed in the middle of the curved surface 4, and a vulcanized rubber sealing ring 5 is arranged. D507 is overlaid at the position of the boss 6 of the valve body 3, and the valve seat 10 is processed. A T-shaped rubber sealing ring 5 is arranged in a second groove of the processed butterfly plate 1, then the T-shaped sealing ring 5 is fixed by a pressing ring 8, a screw 9 is screwed into a through hole of the pressing ring 8, the depth of the screwed screw 9 is adjusted, the purpose of fixing the T-shaped sealing ring 5 is achieved, and the butterfly plate 1 is conveniently arranged in an inner cavity of the valve body 3. Then the butterfly plate 1 is arranged in the inner cavity of the valve body 3, the valve rod 2 is inserted into the shaft hole, and the valve rod 2 is connected with the valve body 3 and the butterfly plate 1. The position of the butterfly plate 1 is adjusted to enable the metal curved surface 4, the sealing ring 5 and the T-shaped sealing ring 7 to be tightly matched with the valve seat 10, and then the screw 9 is screwed down to enable a certain interference magnitude to exist between the T-shaped sealing ring 7 and the valve seat 10.

When medium pressure is applied to the T-shaped sealing ring 7 from the valve rod 2, the metal curved surface 4 of the butterfly plate 1 forms a first seal, the sealing ring 5 forms a second seal, and the T-shaped sealing ring 7 forms a third seal, so that zero leakage of the valve is firmly ensured by the three-layer sealing structure, the deformation of the sealing surface of the butterfly plate 1 is also ensured to be zero by the metal curved surface 4 of the butterfly plate 1, and the interference magnitude between the T-shaped sealing ring 7 and the valve seat 10 is ensured to be unchanged.

Claims

1. The utility model provides a triple seal structure of butterfly valve, includes valve body, disk seat and dish board, its characterized in that: the disc and the valve seat are arranged in an inner cavity of the valve body, the disc is arranged in the valve seat, the valve rod penetrates through the valve body, the valve seat and the disc, the periphery of the disc is curved in the axial section of the disc, the surface where the curve is located forms a curved surface, an annular boss is arranged on the inner side surface of the valve seat along the circumferential direction, the inner circumferential surface of the boss is a conical surface, a hard sealing structure is formed between the curved surface and the inner conical surface of the boss, a first groove is formed in the curved surface along the circumferential direction of the disc, a sealing ring is arranged in the first groove, a soft sealing structure is formed by the sealing ring and the conical surface of the boss, a pressing ring is arranged on the end surface of the disc, a T-shaped sealing ring is arranged between the pressing ring and the disc, a second groove for mounting the T-shaped sealing ring is respectively formed in the disc and the pressing ring, and the outer circumferential surface of the T-shaped sealing ring and the conical surface of the boss form a soft sealing structure.

2. A triple seal arrangement for a butterfly valve according to claim 1, wherein: at least two through holes are uniformly arranged in the end face of the pressing ring along the circumferential direction, a screw is respectively arranged in each through hole, and the pressing ring is fixed with the disc plate through the screws.

3. A triple seal arrangement for a butterfly valve according to claim 1, wherein: the sealing ring and the T-shaped sealing ring are both rubber rings.

4. The triple seal structure of a butterfly valve according to claim 1, wherein: the curve is an arc line or a parabola line.