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CN-224229275-U - Multi-layer sealing ring combination structure

CN224229275UCN 224229275 UCN224229275 UCN 224229275UCN-224229275-U

Abstract

The utility model belongs to the technical field of valve equipment, and relates to a multi-level sealing ring combined structure, which comprises a valve body, wherein a valve shaft is rotatably arranged in an upper shaft hole and a lower shaft hole of the valve body, a butterfly plate is arranged in an inner cavity of the valve body and fixedly connected with the valve shaft, a sealing ring is arranged on a positioning boss of the butterfly plate and is pressed and fixed through a sealing ring pressing ring, the end face of the lower shaft hole of the valve body is connected with a bottom cover in a sealing manner, the sealing ring can be replaced, a valve seat is constructed on the valve body, the sealing ring can be matched with the valve seat in a sealing manner, the sealing ring adopts a metal sealing ring or a combination of the multi-level sealing ring and a metal ring pad, the assembly structure of the multi-level sealing ring and the metal ring pad is identical to the structure of the metal sealing ring, and the radial outer side of the multi-level sealing ring can be matched with the sealing face of the valve seat. The same valve can be compatible with two sealing rings, and the valve can adapt to the requirements of multiple working conditions after interchange, and the valve does not need to be independently configured for coping with other working conditions.

Inventors

  • HAO XIANGJUN
  • ZHANG HUAN
  • BIAN HONGFEI
  • JIN YONGMING

Assignees

  • 无锡宝牛阀业有限公司

Dates

Publication Date
20260512
Application Date
20250521

Claims (8)

  1. 1. A multi-layer sealing ring combined structure is characterized by comprising a valve body (1), wherein a valve shaft (3) is rotatably arranged in an upper shaft hole and a lower shaft hole of the valve body (1), a butterfly plate (2) is arranged in an inner cavity of the valve body (1) and fixedly connected with the valve shaft (3), a sealing ring is arranged on a positioning boss of the butterfly plate (2), the sealing ring is tightly pressed and fixed through a sealing ring pressing ring (5), the end face of the lower shaft hole of the valve body (1) is connected with a bottom cover (6) in a sealing manner, and the sealing ring can be replaced; a valve seat is formed on the valve body (1), and a sealing ring can be in sealing fit with the valve seat; The sealing ring adopts a combination of a metal sealing ring (4) or a multi-level sealing ring (4 a) and a metal ring pad (4 b), the assembly structure of the multi-level sealing ring (4 a) and the metal ring pad (4 b) is the same as that of the metal sealing ring (4), and the radial outer side of the multi-level sealing ring (4 a) can be matched with the sealing surface of the valve seat.
  2. 2. The multi-layer sealing ring combination structure according to claim 1, wherein shaft sleeves are arranged in the upper shaft hole and the lower shaft hole of the valve body (1) to realize the rotary support of the valve shaft (3).
  3. 3. The multi-layer sealing ring combination structure of claim 1, wherein the butterfly plate (2) is connected with the valve shaft (3) through pins or keys.
  4. 4. The multi-layered sealing ring assembly of claim 1, wherein the multi-layered sealing ring (4 a) is formed by alternately laminating a plurality of metal substrates and non-metal layers to form a multi-layered sealing surface.
  5. 5. The multi-layer sealing ring assembly structure according to claim 1, wherein the inner wall of the multi-layer sealing ring (4 a) is provided with a first semicircular groove (4 a-1) protruding towards the center, and the first semicircular groove (4 a-1) is matched with a groove opening (4 b-1) processed by the metal ring pad (4 b).
  6. 6. The multi-layered sealing ring assembly structure according to claim 5, wherein the metal ring pad (4 b) is further provided with a second semicircular groove (4 b-2) penetrating from top to bottom so as to realize installation and positioning, and the second semicircular groove (4 b-2) is arranged on the inner wall of the metal ring pad (4 b) and is positioned on the opposite side of the groove opening (4 b-1) in the radial direction.
  7. 7. The multi-layer sealing ring combined structure of claim 1, wherein the step surface of the upper shaft hole of the valve body (1) is sequentially provided with a first filler (7), a first upper shaft sleeve (8), a second upper shaft sleeve (9), a second filler (10), a sleeve (11) and a gland (12), the gland (12) is connected to the upper end of the valve body (1) through bolt fastening, and the circular arc part of the bottom surface of the gland (12) is tightly pressed on the circular arc part of the upper end of the sleeve (11).
  8. 8. The multi-layer sealing ring combination structure of claim 1, wherein a third filler (13) and a first lower shaft sleeve (14) are sequentially arranged in the lower shaft hole of the valve body (1).

Description

Multi-layer sealing ring combination structure Technical Field The utility model belongs to the technical field of valve equipment, and relates to a multi-layer sealing ring combined structure. Background The triple offset butterfly valve is one of the fastest growing valve varieties in recent decades due to good flow regulation function and closing sealing property, and is widely applied to the fields of chemical industry, metallurgical industry, energy industry, mining, urban building, urban water supply, drainage and the like. The variety and number of the used materials are still expanding, and the materials develop to high temperature, high pressure, large caliber, high sealing performance, long service life and multifunction of one valve. The reliability and other performance indexes of the device reach higher level. The sealing pair of the triple offset butterfly valve is a core component for realizing efficient sealing and stable operation, the sealing pair is composed of ‌ sealing rings and ‌ valve seat sealing surfaces ‌, the two sealing rings are tightly matched through specific geometric design, the valve seat and the valve body are of an integrated casting structure, the valve seat cannot be replaced, the sealing rings can only be replaced, the multi-layer sealing rings cannot be replaced with the metal sealing rings due to structural differences, and in order to meet the use requirements of different working conditions, a plurality of sets of valve systems are required to be configured by a user. Disclosure of Invention The utility model aims at the problems and provides a multi-layer sealing ring combined structure which can solve the problem that the existing three-eccentric butterfly valve sealing ring cannot be completely exchanged, and the structure can realize complete exchange with a metal sealing ring under the condition that the valve structure and other parts are not changed, so that the same valve can be compatible with two sealing rings, the valve can adapt to the requirements of multiple working conditions after exchange, the valve does not need to be independently configured for coping with other working conditions, in addition, when a single type of sealing ring is out of stock or damaged, the valve can be quickly replaced by another sealing ring, the downtime is reduced, the production efficiency is improved, and the loss of customers is reduced. According to the technical scheme, the multi-layer sealing ring combined structure is characterized by comprising a valve body, wherein a valve shaft is rotatably arranged in an upper shaft hole and a lower shaft hole of the valve body, a butterfly plate is arranged in an inner cavity of the valve body and fixedly connected with the valve shaft, a sealing ring is arranged on a positioning boss of the butterfly plate and is pressed and fixed through a sealing ring pressing ring, the end face of the lower shaft hole of the valve body is connected with a bottom cover in a sealing way, and the sealing ring can be replaced; A valve seat is formed on the valve body, and a sealing ring can be in sealing fit with the valve seat; the sealing ring adopts a metal sealing ring or a combination of a multi-level sealing ring and a metal ring pad, the assembly structure of the multi-level sealing ring and the metal ring pad is the same as that of the metal sealing ring, and the radial outer side of the multi-level sealing ring can be matched with the sealing surface of the valve seat. As a further improvement of the utility model, shaft sleeves are arranged in the upper shaft hole and the lower shaft hole of the valve body so as to realize the rotary support of the valve shaft. As a further development of the utility model, the butterfly plate is connected to the valve shaft by means of pins or keys. As a further improvement of the utility model, the multi-layer sealing ring is formed by alternately laminating a plurality of metal matrixes and non-metal layers to form a plurality of sealing surfaces. As a further improvement of the utility model, the inner wall of the multi-layer sealing ring is provided with a first semicircular groove protruding towards the center, and the first semicircular groove is matched with a groove opening processed by the metal ring gasket. As a further improvement of the utility model, the metal ring pad is also provided with a second semicircular groove which penetrates up and down so as to realize installation and positioning, and the second semicircular groove is arranged on the inner wall of the metal ring pad and is positioned on the radial opposite side of the groove opening. As a further improvement of the utility model, the step surface of the upper shaft hole of the valve body is sequentially provided with a first filler, a first upper shaft sleeve, a second filler, a sleeve and a gland, the gland is fastened and connected to the upper end of the valve body through bolts, and the circular arc part of the bottom s