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CN-224214749-U - Composite sealing valve seat with elastic automatic compensation function

CN224214749UCN 224214749 UCN224214749 UCN 224214749UCN-224214749-U

Abstract

The utility model discloses a composite sealing valve seat with an elastic automatic compensation function, which comprises a base, a sealing seat and a sealing ring, and is characterized in that the sealing ring is of an inverted trapezoid cross-section structure and is arranged on a cylindrical surface between a first step and a second step of an outer circular surface of the base, an elastic compensation device consisting of a cylindrical spring and a pressing ring is arranged in a second spring cavity at the left side of the sealing ring, and when the sealing ring is worn in a frequent moving process, the cylindrical spring pushes the pressing ring, so that an inclined surface of the pressing ring wedges the sealing ring, the sealing ring is radially expanded, the abrasion of the outer circular surface of the sealing ring is automatically compensated, reliable sealing between a valve seat and a valve body channel is realized, and the sealing performance between the valve seat and the valve body is improved.

Inventors

  • LU ZAIWANG
  • LIN GUANGBAN
  • DING XIN
  • LIN CHAO
  • SU LIJUN
  • HU ANCHUN

Assignees

  • 浙江伯特利科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250519

Claims (3)

  1. 1. A composite sealing valve seat with an elastic automatic compensation function comprises a base (1), a sealing seat (2) and a sealing ring (5), wherein the base (1) is embedded in a channel of a valve body (8), the sealing seat (2) is embedded in the right end of the base (1) and matched with a ball body arranged in a valve cavity to form a sealing pair, a spring (9) is arranged in a spring cavity (10) between the left end face of the base (1) and the valve body (8), a sealing ring (5) is arranged between the outer circumference of the base (1) and the inner wall of the channel of the valve body (8), the composite sealing valve seat is characterized in that the sealing ring (5) has an inverted trapezoid cross-section structure and is arranged on the outer circular surface between a first step (12) and a second step (13) of the base (1), the first step (12) has an inclined surface matched with the right trapezoid surface of the sealing ring (5), an elastic compensation device is arranged between the trapezoid surface on the left side of the sealing ring (5) and a radial step (14) in the channel of the valve body (8), the elastic compensation device consists of a compression ring (3) and a cylindrical spring (6), the elastic compensation device is arranged between the radial step (14) and the radial step (14) of the valve body (8) and the second step (7) of the base (1) and the second step (13) has a circular compression ring structure, the inner wall of the cylinder is movably embedded on the cylindrical surface between a first step (12) and a second step (13) of the base (1), the outer circular surface is in clearance fit with the inner wall of the valve body (8), the right end surface of the cylinder is provided with an inclined surface which is matched with the trapezoid surface on the left side of the sealing ring (5), and the cylindrical spring (6) is uniformly arranged in a second spring cavity (7) between the left end surface of the compression ring (3) and the radial step (14) of the valve body (8).
  2. 2. The composite sealing valve seat with the elastic automatic compensation function according to claim 1, wherein a flushing device is arranged on the base (1), the flushing device is formed by arranging an annular flow passage (11) on the base at the inner side of the sealing seat (2), the annular flow passage (11) is communicated with a flushing valve arranged on the valve body (8), and sealing rings (4) are respectively arranged between the base (1) at the two sides of the annular flow passage (11) and the inner wall of the passage of the valve body (8).
  3. 3. The composite sealing valve seat with the elastic automatic compensation function according to claim 1 or 2 is characterized in that the sealing seat (2) adopts a rubber sealing ring, and a metal spherical sealing surface (15) which is matched with the spherical surface of a sphere is arranged on a base (1) at the outer side of the rubber sealing ring to form a double sealing structure.

Description

Composite sealing valve seat with elastic automatic compensation function Technical Field The utility model relates to a valve sealing device, in particular to a valve seat of a ball valve. Background The valve seat of the ball valve is arranged in the valve body channel and is matched with the ball body to form a sealing pair, in order to prevent the valve seat and the ball body from being blocked due to temperature change, the valve seat of the ball valve is generally a floating valve seat, namely, a spring is arranged between the back surface of the valve seat and a radial step of the valve body channel, the valve seat and the ball body are in compression contact by the elastic force of the spring, the expansion quantity generated by the temperature change can be absorbed, and a sealing ring is generally arranged between the outer circular surface of the valve seat and the inner wall of the valve body channel to realize the sealing between the valve seat and the valve body channel. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model provides the composite sealing valve seat with the elastic automatic compensation function, which can elastically compensate the abrasion of the outer circular surface of the sealing ring and improve the sealing performance between the valve seat and the valve body channel. The technical scheme of the utility model is as follows: The composite sealing valve seat with the elastic automatic compensation function comprises a base, a sealing seat and a sealing ring, wherein the base is integrally embedded in a valve body channel, the sealing seat is embedded at one end of the base and matched with a ball body arranged in a valve cavity to form a sealing pair, a spring is arranged in a spring cavity between the other end of the base and the valve body, and the sealing ring is arranged between the outer circumference of the base and the inner wall of the valve body channel; the sealing ring is characterized by having an inverted trapezoid cross-section structure and being arranged on a cylindrical surface between a first step and a second step on the outer circumferential surface of a base, the first step is provided with an inclined surface matched with a trapezoid surface on the right side of the sealing ring, an elastic compensation device is arranged between the trapezoid surface on the left side of the sealing ring and a radial step in a valve body channel, the elastic compensation device consists of a compression ring and a cylindrical spring and is arranged in a second spring cavity between the radial step and the second step, the right side of the compression ring is of a cylindrical structure, the inner wall of the cylinder is movably embedded on the cylindrical surface between the first step and the second step on the outer circumferential surface of the base, the outer circumferential surface is in clearance fit with the inner wall of the valve body channel, the right end surface of the cylinder is provided with an inclined surface matched with the trapezoid surface on the other side of the sealing ring, and the cylindrical spring is uniformly arranged in the second spring cavity between the left end surface of the compression ring and the radial step of the valve body. In the technical scheme, the flushing device is arranged on the base, the flushing device is formed by arranging an annular flow channel on the base at the inner side of the sealing seat, a flushing valve is arranged on the valve body at one end of the annular flow channel, and sealing rings are respectively arranged between the base at two sides of the annular flow channel and the inner wall of the valve body channel. In the technical scheme, the sealing seat adopts a rubber sealing ring, and a metal spherical sealing surface matched with the spherical surface is arranged on the base at the outer side of the rubber sealing ring to form a double sealing structure. Compared with the prior art, the sealing ring has the beneficial effects that the elastic compensation device formed by the cylindrical spring and the compression ring is arranged in the second spring cavity at the left side of the sealing ring, when the sealing ring is worn in the frequent moving process, the cylindrical spring pushes the compression ring, so that the inclined surface of the compression ring wedges the sealing ring, the sealing ring radially expands, the abrasion of the outer circular surface of the sealing ring is automatically compensated, the reliable sealing between the base and the valve body channel is realized, and the sealing performance between the valve seat and the valve body is effectively improved. Drawings Fig. 1 is a schematic structural view of the present utility model. In the figure, a base, a sealing seat 2, a compression ring 3, a sealing ring 4, a sealing ring 5, a cylindrical spring 6, a second spring cavity 7, a valve body 8, a spring 9, a spring cavity 10, an an