A high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves

Abstract

The present invention discloses a high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves, which includes a gasket ring and a compression ring. Both the gasket ring and the compression ring are annular structures. The upper surface of the gasket ring is connected to the inner side of the external valve body. A compression ring is fixed at the lower end of the gasket ring. The gasket ring is an inverted L-shaped structure, and the upper end of the compression ring is a boss-shaped structure. The inner sides of the gasket ring and the compression ring are in contact with one side of the valve plate inside the external valve body. And a sealing valve seat with a J-shaped cross-section is fixed between the gasket ring and the compression ring. A C-shaped fixed energy accumulator is arranged inside the sealing valve seat. This high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves can provide good sealing performance and dynamic sealing ability, can automatically compensate for assembly errors, eccentricity and many other factors for self-complementary sealing, making the sealing performance of the JC combined flexible valve seat of the butterfly valve have the advantages of strong self-adaptability, high reliability, high robustness, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of high-performance butterfly valve JC combined flexible valve seats, and specifically to a high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves. Background Technique

[0002] With the continuous development of offshore engineering equipment and high-tech ships, as well as the retrofitting of exhaust gas desulfurization and denitrification of old ships, cryogenic and high-temperature butterfly valves in the field of marine engineering in China have been applied to ensure optimal, high-performance, high-safety, environmental protection, and trouble-free operation of the system with zero emissions. However, there are problems such as poor sealing, low lifespan, poor reliability, large torque, and inability to perform on-line maintenance in general low-temperature and high-temperature butterfly valves. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves, which has good overall sealing performance, a wide range of applications, and can be used in many complex working conditions such as cryogenic, high-temperature, high-pressure, low-pressure, and vacuum. It has multiple functions such as reliable sealing, elastic resilience, energy storage, and automatic compensation, can provide good sealing performance and dynamic sealing ability, and can automatically compensate for assembly errors, eccentricity, and other factors for self-compensating sealing, making the sealing performance of the butterfly valve JC combined flexible valve seat have the advantages of strong self-adaptability, high reliability, and high robustness, and can effectively solve the problems in the background technique.

[0004] To achieve the above object, the present invention provides the following technical solution: A high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves, including a gasket ring and a compression ring. Both the gasket ring and the compression ring are annular structures. The upper surface of the gasket ring is connected to the inner side of the external valve body. A compression ring is fixed to the lower end of the gasket ring. The gasket ring is an inverted L-shaped structure, and the upper end of the compression ring is a convex structure. The inner sides of the gasket ring and the compression ring are attached to one side of the valve plate inside the external valve body, and a sealing valve seat with a J-shaped cross-section is fixed between the gasket ring and the compression ring. A C-shaped fixed energy accumulator is provided inside the sealing valve seat, an equalizing energy increasing ring is provided outside the C-shaped fixed energy accumulator, and a pressing member for fixing the compression ring is provided inside the external valve body.

[0005] Further, the upper end of the convex part of the compression ring presses against the lower surface of the gasket ring to press the outer edge of the sealing valve seat, and sealing gaskets are provided on both the upper surface and the lower surface of the outer edge of the sealing valve seat.

[0006] Further, an intermediate semi-circular ring is provided between the C-shaped fixed energy accumulator and the sealing valve seat. The cross-section of the intermediate semi-circular ring is a semi-circular structure, and... of the equalizing energy increasing ring.

[0007] Further, the C-shaped fixed energy accumulator is an overall spiral annular structure, and the C-shaped fixed energy accumulator is processed from an elastic material.

[0008] Furthermore, the sealing valve seat is formed by processing a metal material, and an electroplated layer is provided at the joint where the sealing valve seat fits with the valve plate inside the external valve body.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: The high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves has a simple structure, is easy to operate, has good overall sealing performance, a wide range of applications, and can be used in many complex working conditions such as cryogenic, high-temperature, high-pressure, low-pressure, and vacuum. It has multiple functions such as reliable sealing, elastic resilience, energy storage, and automatic compensation, can provide good sealing performance and dynamic sealing ability, and can automatically compensate for assembly errors, eccentricity, and many other factors for self-complementary sealing, making the sealing performance of the JC combined flexible valve seat of the butterfly valve have the advantages of strong self-adaptability, high reliability, and high robustness. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present invention;

[0011] Figure 2 is a partially enlarged schematic structural diagram of the present invention;

[0012] Figure 3 is an enlarged schematic structural diagram at A of the present invention;

[0013] Figure 4 is a schematic structural diagram of the energy accumulator of the present invention.

[0014] In the figure: 1 gasket ring, 2 pressure ring, 3 sealing valve seat, 4 C-type fixed energy accumulator, 5 equalizing energy increasing ring, 6 sealing gasket, 7 transition semi-circular ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] Please refer to Figures 1-4, the present invention provides a technical solution: a high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves, including a gasket ring 1 and a pressure ring 2. Both the gasket ring 1 and the pressure ring 2 are annular structures. The upper surface of the gasket ring 1 is connected to the inner side of the external valve body, and the pressure ring 2 is fixed to the lower end of the gasket ring 1. The gasket ring 1 is an inverted L-shaped structure, and the upper end of the pressure ring 2 is a convex structure. The inner sides of the gasket ring 1 and the pressure ring 2 are in contact with one side of the valve plate inside the external valve body. And a sealing valve seat 3 with a J-shaped cross-section is fixed between the gasket ring 1 and the pressure ring 2. A C-shaped fixed energy accumulator 4 is provided inside the sealing valve seat 3, and an equalizing energy increasing ring 5 is provided outside the C-shaped fixed energy accumulator 4. And a pressing member for fixing the pressure ring 2 is provided inside the external valve body. The equalizing energy increasing ring 5 is made of austenitic stainless steel. Different materials have different thermal expansion and contraction properties. Different combinations of materials can withstand low-temperature or high-temperature working conditions, and can improve the stable and lasting sealing level and dynamic sealing ability. The pressing member is a prior art, and the pressing member includes a support ring connected to the external valve body, and bolts for pressing the pressure ring 2 are evenly arranged on the support ring. The sealing valve seat 3 undergoes elastic deformation to improve the fitting ability with the valve plate and achieve reliable sealing of the sealing surface. The upper end of the convex part of the pressure ring 2 is pressed against the lower surface of the gasket ring 1 to press the outer edge of the sealing valve seat 3. And sealing gaskets 6 are provided on both the upper surface and the lower surface of the outer edge of the sealing valve seat 3. An intermediate semi-circular ring 7 is provided between the C-shaped fixed energy accumulator 4 and the sealing valve seat 3. The cross-section of the intermediate semi-circular ring 7 is a semi-circular structure. And the intermediate semi-circular ring 7 and the C-shaped fixed energy accumulator 4 are integrally a spiral annular structure. And the C-shaped fixed energy accumulator 4 is made of an elastic material. The sealing valve seat 3 is formed by processing a metal material. And an electroplated layer is provided at the joint between the sealing valve seat 3 and the valve plate inside the external valve body. The metal of the electroplated layer belongs to a soft material, and its hardness is lower than that of the valve plate sealing surface hardness, which can make up for the material friction loss, is beneficial to sealing, realizes zero leakage, has a long service life, and an infinite quality guarantee period.

[0017] During use: The equalizing energy increasing ring 5 is made of austenitic stainless steel. Different materials have different thermal expansion and contraction properties. Different combinations of materials can withstand low-temperature or high-temperature working conditions, and can improve the stable and lasting sealing level and dynamic sealing ability. The sealing valve seat 3 undergoes elastic deformation to improve the fitting ability with the valve plate and achieve reliable sealing of the sealing surface. And the metal of the electroplated layer on the sealing valve seat 3 belongs to a soft material, and its hardness is lower than that of the valve plate sealing surface hardness, which can make up for the material friction loss, is beneficial to sealing, realizes zero leakage, has a long service life, and an infinite quality guarantee period. And the outer circle of the equalizing energy increasing ring 5 is in a free state and not fixed, and can be automatically adjusted according to the position of the valve plate. The sealing surface fitting degree is consistent, automatically compensates for the offset and eccentricity of the poor processing and assembly of the butterfly valve, automatically compensates for the wear of the sealing surface, and provides permanent elasticity to the sealing surface.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-performance JC combined flexible valve seat for cryogenic and high-temperature butterfly valves, comprising a gasket ring (1) and a pressure ring (2). Both the gasket ring (1) and the pressure ring (2) are annular structures. It is characterized in that: The upper surface of the gasket ring (1) is connected to the inner side of the external valve body. The lower end of the gasket ring (1) is fixed with a pressure ring (2). The gasket ring (1) is an inverted L-shaped structure, and the upper end of the pressure ring (2) is a boss-shaped structure. The inner sides of the gasket ring (1) and the pressure ring (2) are attached to one side of the valve plate inside the external valve body. And a sealing valve seat (3) with a J-shaped cross-section is fixed between the gasket ring (1) and the pressure ring (2). A C-shaped fixed energy accumulator (4) is provided inside the sealing valve seat (3). An equalizing energy-increasing ring (5) is provided outside the C-shaped fixed energy accumulator (4). And a pressing member for fixing the pressure ring (2) is provided inside the external valve body. The equalizing energy-increasing ring (5) is made of austenitic stainless steel; The upper end of the boss of the pressure ring (2) presses against the lower surface of the gasket ring (1) to press the outer edge of the sealing valve seat (3). And sealing gaskets (6) are provided on both the upper surface and the lower surface of the outer edge of the sealing valve seat (3); An excessive semi-circular ring (7) is provided between the C-shaped fixed energy accumulator (4) and the sealing valve seat (3). The cross-section of the excessive semi-circular ring (7) is a semi-circular structure; The C-shaped fixed energy accumulator (4) is an overall spiral annular structure, and the C-shaped fixed energy accumulator (4) is made of an elastic material; The sealing valve seat (3) is formed by processing a metal material, and a plating layer is provided at the joint where the sealing valve seat (3) is attached to the valve plate inside the external valve body.

Images