High-temperature-resistant and wear-resistant flexible sealing O-shaped ball valve

Abstract

The utility model discloses a high-temperature-resistant and wear-resistant flexible sealing O-shaped ball valve which is characterized by further comprising flexible sealing rings arranged at the two ends of an O-shaped ball body, annular grooves are formed in the inner sides of the flexible sealing rings, elastic supporting rings are embedded in the annular grooves, sealing grooves matched with the flexible sealing rings are formed in the inner wall of a valve body, and the flexible sealing rings are arranged in the sealing grooves. The surface of the O-shaped ball body is coated with a high-temperature-resistant and wear-resistant coating; due to the arrangement of the flexible sealing ring, good sealing performance can be kept in a high-temperature and strong-abrasion environment, and the service life of the ball valve is effectively prolonged; the elastic supporting ring is embedded in the flexible sealing ring, so that the flexible sealing ring is tightly connected with the sealing groove of the valve body, and the sealing performance of the ball valve is improved; and the surface of the O-shaped ball body is coated with the high-temperature-resistant and wear-resistant coating, so that the high-temperature-resistant and wear-resistant performance of the ball valve is further improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a kind of high-temperature-resistant wear-resistant flexible sealing O type ball valve. BACKGROUND

[0002] Ball valve is widely used in petroleum, chemical industry, electric power, metallurgy and other industries as a commonly used fluid control device;Traditional ball valve is prone to sealing failure, valve jam and other problems under high temperature, high pressure and strong wear environment, resulting in shortened service life and increased maintenance cost;The sealing material of existing ball valve is mostly rigid material, which is difficult to adapt to deformation and wear under complex working conditions, therefore, a high-temperature-resistant wear-resistant flexible sealing O type ball valve is proposed. SUMMARY

[0003] The main purpose of the utility model is to effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a high-temperature-resistant wear-resistant flexible sealing O type ball, comprising a valve body, an O type ball arranged in the valve body, a valve stem connected with the O type ball, and a driving device connected with the valve stem, characterized in that: it further comprises a flexible sealing ring arranged at both ends of the O type ball, the inner side of the flexible sealing ring is provided with an annular groove, the annular groove is embedded with an elastic support ring, the inner wall of the valve body is provided with a sealing groove matched with the flexible sealing ring, and the surface of the O type ball is coated with a high-temperature-resistant wear-resistant coating.

[0005] Preferably, the high-temperature-resistant wear-resistant coating is a tungsten carbide coating or a silicon nitride coating.

[0006] Preferably, the sealing groove is provided with a high-temperature-resistant gasket and an elastic sheet connected with the high-temperature-resistant gasket.

[0007] Preferably, the high-temperature-resistant gasket is a graphite gasket or a ceramic fiber gasket.

[0008] Preferably, the outer surface of the valve stem is provided with a corrosion-resistant coating.

[0009] Preferably, the outer surface of the valve stem is provided with a corrosion-resistant coating, and the corrosion-resistant coating is a polytetrafluoroethylene coating or a ceramic coating.

[0010] Preferably, the valve stem is provided with a connecting shaft connected with the driving device.

[0011] Preferably, the driving device is an electric actuator or a manual worm gear mechanism.

[0012] The utility model has the advantages of the following: through the setting of the flexible sealing ring, good sealing performance can be kept under high temperature and strong wear environment, and the service life of the ball valve is effectively prolonged; through the setting of the elastic support ring embedded in the flexible sealing ring, the flexible sealing ring is tightly connected with the sealing groove of the valve body, and the sealing performance of the ball valve is improved; through the high-temperature and wear-resistant coating on the surface of the O-shaped ball, the high-temperature and wear-resistant performance of the ball valve is further improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is the overall structure schematic diagram of the utility model;

[0014] Fig. 2 is the local enlarged view of the utility model.

[0015] Legend: 1, valve body; 11, sealing groove; 12, high-temperature gasket; 2, O-shaped ball; 21, high-temperature and wear-resistant coating; 3, valve stem; 4, driving device; 5, flexible sealing ring; 51, annular groove; 52, elastic support ring; 6, connecting shaft. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0017] As shown in Figs. 1-2 , a high-temperature and wear-resistant flexible sealing O-shaped ball valve, comprising a valve body 1, an O-shaped ball 2 arranged in the valve body 1, a valve stem 3 connected with the O-shaped ball 2, and a driving device 4 connected with the valve stem 3, characterized in that: it further comprises a flexible sealing ring 5 arranged at both ends of the O-shaped ball 2, the inner side of the flexible sealing ring 5 is provided with an annular groove 51, the annular groove 51 is embedded with an elastic support ring 52, the inner wall of the valve body 1 is provided with a sealing groove 11 matched with the flexible sealing ring 5, and the surface of the O-shaped ball 2 is coated with a high-temperature and wear-resistant coating 21; through the setting of the flexible sealing ring 5, good sealing performance can be kept under high temperature, high pressure and strong wear environment, and the service life of the ball valve is effectively prolonged; through the setting of the elastic support ring 52 embedded in the flexible sealing ring 5, the flexible sealing ring 5 is tightly connected with the sealing groove 11 of the valve body 1, and the sealing performance of the ball valve is improved; through the high-temperature and wear-resistant coating 21 coated on the surface of the O-shaped ball 2, the high-temperature and wear-resistant performance of the ball valve is further improved, and the maintenance cost is reduced.

[0018] In one embodiment, the high-temperature-resistant and wear-resistant coating 21 is a tungsten carbide coating or a silicon nitride coating; the flexible sealing ring 5 is one or more composite materials of fluororubber, silicone rubber or polytetrafluoroethylene; the outer surface of the valve stem 3 is provided with a corrosion-resistant coating, and the corrosion-resistant coating is a polytetrafluoroethylene coating or a ceramic coating, thereby improving the high-temperature resistance and wear resistance of the ball valve and increasing the service life of the ball valve.

[0019] In one embodiment, the sealing groove 11 is provided with a high-temperature-resistant gasket 12 and an elastic sheet 13 connected to the high-temperature-resistant gasket 12, and the high-temperature-resistant gasket 12 is a graphite gasket or a ceramic fiber gasket.

[0020] In one embodiment, the valve stem 3 is provided with a connecting shaft 6 connected to the driving device 4, and the driving device 4 is an electric actuator or a manual worm gear mechanism.

[0021] In the use process of the utility model, first, the elastic support ring 52 is embedded in the annular groove 51 in the flexible sealing ring 5, then the flexible sealing ring 5 is clamped at the end of the O-shaped ball 2, that is, the bayonet of the elastic support ring 52 is clamped at the end of the O-shaped ball 2, the outer side of the flexible sealing ring 5 is in the sealing groove 11 of the valve body 1, and the high-temperature-resistant gasket 12 in the sealing groove 11 is tightly connected with the flexible sealing ring 5 through the elastic sheet 13, under the driving of the driving device 4, the connecting shaft 6 drives the valve stem 3 to rotate, the valve stem 3 drives the O-shaped ball 2 to rotate, the ball valve is opened, and the flexible sealing ring 5 is always sealed well with the high-temperature-resistant gasket 12 in the sealing groove 11.

[0022] The basic principles and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and wear-resistant flexible sealing O-type ball valve, comprising a valve body (1), an O-type ball (2) disposed within the valve body (1), a valve stem (3) connected to the O-type ball (2), and a drive device (4) connected to the valve stem (3), characterized in that: It also includes flexible sealing rings (5) set at both ends of the O-shaped ball (2), the inner side of the flexible sealing ring (5) is provided with an annular groove (51), the annular groove (51) is embedded with an elastic support ring (52), the inner wall of the valve body (1) is provided with a sealing groove (11) that cooperates with the flexible sealing ring (5), and the surface of the O-shaped ball (2) is coated with a high temperature and wear resistant coating (21).

2. The high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 1, characterized in that: The high-temperature and wear-resistant coating (21) is a tungsten carbide coating or a silicon nitride coating.

3. The high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 1, characterized in that: The sealing groove (11) is provided with a high-temperature resistant gasket (12) and a spring piece (13) connected to the high-temperature resistant gasket (12).

4. The high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 3, characterized in that: The high-temperature resistant gasket (12) is a graphite gasket or a ceramic fiber gasket.

5. A high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 1, characterized in that: The outer surface of the valve stem (3) is provided with a corrosion-resistant coating, which is a polytetrafluoroethylene coating or a ceramic coating.

6. A high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 5, characterized in that: The valve stem (3) is provided with a connecting shaft (6) that is connected to the drive device (4).

7. A high-temperature resistant and wear-resistant flexible sealing O-type ball valve according to claim 6, characterized in that: The drive device (4) is an electric actuator or a manual worm gear mechanism.

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