CN211449852U

CN211449852U - High-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve

Info

Publication number: CN211449852U
Application number: CN201922113656.5U
Authority: CN
Inventors: 李瑞彦; 贾金光; 杜昆明; 岑进肖
Original assignee: ZHEJIANG LIANDA VALVE CO Ltd
Current assignee: ZHEJIANG LIANDA VALVE CO Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-09-08
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a two-way eccentric butterfly valve of high temperature resistant dustproof hard seal, including the valve body and wear to establish from the valve body middle part valve rod, be equipped with the packing seal subassembly between valve rod and the valve body, be equipped with transverse passage on the valve body, the linkage has the eccentric dish board that is located transverse passage and links with the valve rod on the valve rod, its characterized in that, the fixed gland that is equipped with in the valve body transverse passage outside, be equipped with between valve body and the gland with eccentric dish board sealing contact's hard seal disk seat, the beneficial effects of the utility model are that: provides a hard-sealing bidirectional eccentric butterfly valve which is high temperature resistant, reduces abrasion and can prevent dust.

Description

High-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to two-way eccentric butterfly valve of high temperature resistant dustproof hard seal.

Background

The double-eccentric butterfly valve is also called as a high-performance butterfly valve, is mainly suitable for drainage of systems such as water plants, power plants, steel plant smelting, chemical engineering, water source spring engineering, environmental facility construction and the like, is particularly suitable for water pipelines, and is used as regulating and intercepting equipment.

The double-eccentric butterfly valve is characterized in that the axis of the valve rod deviates from the center of the butterfly plate and also deviates from the center of the body, the sealing structure is influenced by pressure and other factors when the existing double-eccentric butterfly valve is used, particularly in flammable and explosive places on an oil pipeline, if the high temperature resistance of the double-eccentric butterfly valve is low, the sealing performance of the double-eccentric butterfly valve can be reduced after the double-eccentric butterfly valve is used for a period of time, the service life of the double-eccentric butterfly valve can be reduced, and the valve seat can easily generate much abrasion and corrosion in the working process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide a high temperature resistant, reduce wearing and tearing and can dirt-proof two-way eccentric butterfly valve of sealed firmly.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a two-way eccentric butterfly valve of high temperature resistant dustproof hard seal, includes the valve body and wears to establish from the valve body middle part the valve rod, the valve rod adopts integral single diameter axle, be equipped with the seal packing subassembly between valve rod and the valve body, be equipped with transverse channel on the valve body, the linkage has the eccentric dish board that is located transverse channel and links with the valve rod on the valve rod, a serial communication port, the fixed gland that is equipped with in the valve body transverse channel outside, be equipped with between valve body and the gland with the sealed hard seal disk seat who contacts of eccentric dish board, hard seal disk seat including simultaneously with the stiff end of gland and valve body contact and with the sealed cambered surface end of eccentric dish board, the stiff end is held with the cambered surface seal and is held the integrative hook-shape, the stiff end periphery of hard seal disk seat is equipped with the flexible gasket.

By adopting the technical scheme, the gland can avoid the abrasion and corrosion of the valve seat, and the valve rod and the eccentric disc plate do not need to be disassembled when the valve seat is disassembled, thereby facilitating the subsequent maintenance and replacement; the valve rod is processed by adopting an integral single-diameter shaft, so that the deviation can be reduced. Different from soft sealing, the hard sealing valve seat is made of metal materials and is not easy to deform, when the side of the gland is stressed, pressure is applied to the fixed end of the hard sealing valve seat, the hard sealing valve seat is close to the eccentric disc plate, the sealing force between the eccentric disc plate and the hard sealing valve seat is further increased, when the pressure is applied to the side of the non-gland, the eccentric disc plate is pushed to the hard sealing valve seat, and because the cambered surface sealing end of the hard sealing valve seat is matched with the cambered surface of the eccentric disc plate, the eccentric disc plate is pushed to the hard sealing valve seat more,

the high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve can be further arranged as follows: the sealing packing component comprises a sealing packing, a plurality of groups of V-shaped packing pore passages are uniformly distributed in the sealing packing along the axial direction of the valve rod, high-temperature-resistant packing is filled in the V-shaped packing pore passages and comprises graphite, asbestos and the like, a packing pad is arranged at one end, close to the eccentric disc plate, of the sealing packing, and a detachable packing gland is arranged at the other end, opposite to one end of the packing pad, of the sealing packing.

Adopt above-mentioned technical scheme, can add packing such as graphite, asbestos in the V-arrangement packing pore, this two kinds of materials of graphite, asbestos have a nature of high temperature resistant, high strength, can further improve the utility model discloses a high temperature resistance can, the gland design makes the process of adjusting the packing in the future can not lead to the fact the loading to the disk seat, and this simple structure is convenient, and the practicality is high.

The high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve can be further arranged as follows: and a positioning pin which is not coincident with the axis of the valve rod is welded between the eccentric disc plate and the valve rod.

Adopt above-mentioned technical scheme, eccentric dish board passes through the locating pin off-centre to be fixed on the valve rod for the rotation of eccentric dish board does not use hard seal disk seat as the fulcrum, can with shear stress and with the hard friction reduction between the seal disk seat, make the utility model discloses a maximum torque point is less than conventional valve, thereby avoids leaking, and the locating pin can prevent choked flow, vortex, can not loosen because of the vibration.

The high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve can be further arranged as follows: and a thrust washer is arranged between the thrust bearing and the eccentric disc plate of the valve rod.

By adopting the technical scheme, the thrust washer is used for keeping the central position of the eccentric disc plate.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a partially enlarged schematic view of the position I of the present invention;

fig. 3 is a partially enlarged schematic view of the second embodiment of the present invention.

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.

As shown in fig. 1 to 2, the high temperature resistant dustproof hard sealing two-way eccentric butterfly valve comprises a valve body 1 and a valve rod 2 penetrating through the middle of the valve body 1, a sealing packing 7 assembly is arranged between the valve rod 2 and the valve body 1, a transverse channel is arranged on the valve body 1, an eccentric disc plate 3 located in the transverse channel and linked with the valve rod 2 is linked on the valve rod 2, a positioning pin 10 which does not coincide with the axis of the valve rod 2 is welded between the eccentric disc plate 3 and the valve rod 2, thrust bearings 11 are arranged at two ends of the eccentric disc plate 3 between the valve rod 2 and the valve body 1, a gland 4 is fixedly arranged at the outer side of the transverse channel of the valve body 1, a hard sealing valve seat 5 in sealing contact with the eccentric disc plate 3 is arranged between the valve body 1 and the gland 4, the hard sealing valve seat 5 comprises a fixed end 51 which is simultaneously in contact with the gland 4 and the valve body 1 and an arc, the fixed end 51 and the cambered surface sealing end 52 are integrally formed into a hook shape, and the periphery of the fixed end 51 of the hard sealing valve seat 5 is provided with a flexible gasket 6 which is simultaneously contacted with the gland 4 and the valve body 1. The sealing packing 7 assembly comprises a sealing packing 7, a plurality of groups of V-shaped packing pore passages 71 are uniformly distributed in the sealing packing 7 along the axial direction of the valve rod 2, high-temperature-resistant packing such as graphite and asbestos is filled in the V-shaped packing pore passages 71, a packing gasket 8 is arranged at one end, close to the eccentric disc plate 3, of the sealing packing 7, and a detachable packing gland 9 is arranged at the other end, opposite to one end of the packing gasket 8, of the sealing packing 7.

Claims

1. The utility model provides a two-way eccentric butterfly valve of high temperature resistant dustproof hard seal, includes the valve body and wears to establish from the valve body middle part valve rod, be equipped with the packing seal subassembly between valve rod and the valve body, be equipped with transverse passage on the valve body, the linkage has the eccentric dish board that is located transverse passage and links with the valve rod on the valve rod, its characterized in that: the fixed gland that is equipped with in the valve body transverse passage outside, be equipped with between valve body and the gland with eccentric dish board sealing contact's hard sealed disk seat, hard sealed disk seat including simultaneously with the stiff end of gland and valve body contact and with eccentric dish board sealed cambered surface seal end, stiff end and cambered surface seal end an organic whole forms the hook-type, the stiff end periphery of hard sealed disk seat is equipped with simultaneously with the flexible gasket of gland and valve body contact.

2. The high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve according to claim 1, characterized in that: the sealing packing assembly comprises a sealing packing, a plurality of groups of V-shaped packing channels are uniformly distributed in the sealing packing along the axial direction of the valve rod, high-temperature-resistant packing is filled in the V-shaped packing channels, a packing pad is arranged at one end, close to the eccentric disc plate, of the sealing packing, and a detachable packing gland is arranged at the other end, opposite to one end of the packing pad, of the sealing packing.

3. The high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve according to claim 1, characterized in that: and a positioning pin which is not coincident with the axis of the valve rod is welded between the eccentric disc plate and the valve rod.

4. The high-temperature-resistant dustproof hard-sealing bidirectional eccentric butterfly valve according to claim 1, characterized in that: thrust bearings are arranged between the valve rod and the valve body and positioned at two ends of the eccentric disc plate.