CN-224214713-U - High-performance fireproof butterfly valve

Abstract

The utility model discloses a high-performance fireproof butterfly valve, which comprises a valve body, a disc plate and a sealing assembly arranged between the valve body and the disc plate, wherein a groove is formed in the valve body, one side of the disc plate facing the groove is provided with a sealing inclined surface with a high inner side and a low outer side, the sealing assembly comprises a soft sealing ring and a metal fireproof sealing ring which are sequentially arranged from inside to outside, the soft sealing ring and the metal fireproof sealing ring are fixed in the groove through pressing plate rings, the metal fireproof sealing ring is outwards inclined towards one end of the disc plate to form a first inclined surface, a second inclined surface matched with the first inclined surface is arranged on the soft sealing ring, and the inclination angle of the second inclined surface is larger than that of the first inclined surface. According to the utility model, through a double-layer sealing structure, bevel angle differential design and modularized assembly, double breakthrough of fireproof performance and sealing reliability is realized, meanwhile, the manufacturing cost and maintenance difficulty are obviously reduced, and the innovation is represented by a passive automatic sealing switching mechanism and simplified structure design.

Inventors

• LI XIAOMING
• ZHENG YINGPAI
• ZHAO LEI
• ZHOU YUTING
• Pan Jiaoqiang
• Sun Yangwei
• Xiang Yinzhao

Assignees

• 浙江欧菲石油设备有限公司

Dates

Publication Date

20260508

Application Date

20250521

Claims (5)

1. 1. The utility model provides a high performance fire prevention formula butterfly valve, its characterized in that includes valve body (1), dish board (2) to and set up the seal assembly between valve body (1) and dish board (2), valve body (1) on offer with seal assembly assorted recess (3), dish board (2) are inside high outside low sealed inclined plane (4) towards one side of recess (3), seal assembly include by inside-out soft seal ring (5) and metal fire prevention sealing washer (6) that set gradually, soft seal ring (5) and metal fire prevention sealing washer (6) fix in recess (3) through clamp plate circle (7) in the outside, metal fire prevention sealing washer (6) outwards slope forms first inclined plane (8) in the one end towards dish board (2), soft seal ring (5) are equipped with in one side that meets with first inclined plane (8) assorted second inclined plane (9), just the inclination of second inclined plane (9) is greater than the inclination of first inclined plane (8).
2. 2. A high performance fire protection butterfly valve according to claim 1, wherein the groove (3) comprises a first groove (31) and a second groove (32) which are mutually communicated, the second groove (32) is close to the disc (2), the first groove (31) is used for clamping the metal fire protection seal ring (6), and the second groove (32) is used for clamping the metal fire protection seal ring (6) and the soft seal ring (5).
3. 3. The high-performance fireproof butterfly valve according to claim 2, wherein the angle difference between the first inclined surface (8) and the second inclined surface (9) is 5-15 °.
4. 4. A high performance fire protection butterfly valve according to claim 3, wherein a fire protection gasket (10) is further provided in the first recess (31), and the fire protection gasket (10) is located between the metal fire protection sealing ring (6) and the valve body (1).
5. 5. The high-performance fireproof butterfly valve according to claim 4, wherein the soft sealing ring (5) is made of PTFE material, and the metal fireproof sealing ring (6) is made of stainless steel or nickel-based alloy.

Description

High-performance fireproof butterfly valve Technical Field The utility model relates to a high-performance fireproof butterfly valve. Background The existing butterfly valve has the problems of softening sealing materials, complex structure, high cost and the like under the working condition of high temperature or fire, for example, a common soft sealing ring is easy to burn at high temperature to cause medium leakage, and part of fireproof valves depend on complex driving mechanisms and have high manufacturing cost. Therefore, there is a need for a butterfly valve that has a simple structure and that combines fire protection and sealing properties. Disclosure of utility model Aiming at the problems, the utility model provides a high-performance fireproof butterfly valve, which realizes automatic sealing switching in case of fire through slope angle difference design and solves the problems of sealing failure and insufficient fireproof performance in the prior art. The technical scheme adopted by the utility model is as follows: The utility model provides a high performance fire prevention formula butterfly valve, includes valve body, dish board to and set up the seal assembly between valve body and dish board, the valve body on set up with seal assembly assorted recess, one side of dish board orientation recess is interior high outside low sealed inclined plane, seal assembly include from inside to outside soft sealing ring and the metal fire prevention sealing ring that sets gradually, soft sealing ring and metal fire prevention sealing ring fix in the recess through the clamp plate circle in the outside, metal fire prevention sealing ring outwards inclines at the one end towards dish board and forms first inclined plane, soft sealing ring is equipped with the second inclined plane with first inclined plane assorted in one side that meets with metal fire prevention sealing ring, just the inclination of second inclined plane is greater than the inclination of first inclined plane. Preferably, the groove comprises a first groove and a second groove which are communicated with each other, the second groove is close to the disc plate, the first groove is used for clamping the metal fireproof sealing ring, and the second groove is used for clamping the metal fireproof sealing ring and the soft sealing ring. Preferably, the angle difference between the first inclined plane and the second inclined plane is 5-15 degrees. Preferably, a fire-resistant pad is further arranged in the first groove, and the fire-resistant pad is located between the metal fire-resistant sealing ring and the valve body. Preferably, the soft sealing ring is made of PTFE material, and the metal fireproof sealing ring is made of stainless steel or nickel-based alloy. The utility model realizes double breakthrough of fireproof performance and sealing reliability through a double-layer sealing structure, bevel angle differential design and modularized assembly, simultaneously obviously reduces manufacturing cost and maintenance difficulty, and has innovatively embodied in a passive automatic sealing switching mechanism and simplified structure design, thereby having definite industrial practicability and market popularization value. The innovation point of the utility model is that: 1. double-deck seal structure design: The butterfly valve adopts a double-layer sealing structure combining an inner soft sealing ring (PTFE material) and an outer metal fireproof sealing ring (stainless steel or nickel-based alloy); And the inner soft sealing ring realizes high-efficiency sealing in a low-pressure environment by utilizing the low friction coefficient and corrosion resistance of the PTFE material under the normal working condition. The outer layer metal fireproof sealing ring ensures that the sealing performance is not degraded due to the high strength and high temperature resistance of the metal material under the working condition of fire disaster or high temperature, and effectively prevents flame penetration; The existing butterfly valve mostly adopts a single sealing structure (such as soft sealing or metal sealing), and the double-layer structure can provide reliable sealing under normal and extreme working conditions through material complementarity, so that the problem of sealing failure of the traditional butterfly valve at high temperature is solved; 2. Bevel angle difference and elastic deformation mechanism: the inclined surface angle difference design is that the contact surface of the soft sealing ring and the metal fireproof sealing ring is provided with different inclined angles (the inclined surface angle of the soft sealing ring is 5-15 degrees larger than that of the metal fireproof sealing ring) so as to form preset elastic deformation; Automatic sealing and switching in case of fire: Under normal working conditions, the metal fireproof sealing ring compresses the soft sealing ring to the butterfly plate through elastic force d