Fixed flange ball valve

Abstract

A fixed flange ball valve comprises a valve body, a medium channel, a valve clack and a valve rod, valve seat components used for being matched with the valve clack to form sealing are arranged on the two sides in the valve body, each valve seat component comprises a supporting ring matched with the valve body, a sealing ring connected with the valve clack in an abutting mode is arranged on each supporting ring, and a fireproof rope connected with the valve body in an abutting mode is arranged on each supporting ring in a sleeved mode. The fireproof rope in the valve seat component is connected with the valve body in an abutting mode, flame or high-temperature gas can be effectively prevented from spreading along a sealing part in a fire or high-temperature environment through the high-temperature-resistant characteristic of materials and the structural design, and the fireproof capacity of the ball valve is improved. The fireproof rope not only has a fireproof function, but also can prevent dust and particles from entering the valve seat part to a certain extent, so that medium pollution is reduced, and stable operation of a system is guaranteed. Through the combination of hard sealing and fireproof design, the ball valve is not only suitable for common fluid media, but also especially suitable for high-temperature and inflammable working conditions or working conditions containing solid particles, and the application field of the ball valve is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fixed flange ball valve belongs to the valve field. BACKGROUND

[0002] Ball valve, opening and closing member (ball) is driven by valve rod and makes rotational movement around ball valve axis. It can also be used for fluid regulation and control. The V-shaped ball core of hard sealing V-shaped ball valve and the metal valve seat of hardfacing hard alloy have strong shearing force. It is particularly suitable for media containing fibers and small solid particles. The multi-pass ball valve can not only flexibly control the flow of media, but also can switch the flow direction. At the same time, it can also close any channel and connect the other two channels.

[0003] The existing ball valve usually does not have fireproof function, and most of them only use materials that can withstand high temperature to make sealing filler, which has poor fireproof and dustproof effect. INVENTION CONTENTS

[0004] The utility model aims at overcoming the shortcomings and deficiencies of prior art and provides a fixed flange ball valve.

[0005] A fixed flange ball valve, comprising a valve body, a medium passage, a valve disc and a valve rod, the valve body is provided with valve seat components on both sides for cooperation with the valve disc to form a seal, the valve seat components comprise a support ring cooperating with the valve body, the support ring is provided with a sealing ring abutting against the valve disc, and the support ring is provided with a fireproof rope abutting against the valve body. The design of the fireproof rope in the valve seat component abuts against the valve body, and through the material high-temperature resistance characteristics and the structure design, the fireproof rope can effectively prevent the flame or high-temperature gas from spreading along the sealing part in the fire or high-temperature environment, and improve the fireproof ability of the ball valve. The fireproof rope not only has the fireproof function, but also can block the dust and particulate matter from entering the inside of the valve seat component to a certain extent, reduce the medium pollution and ensure the stable operation of the system. Through the combination of hard sealing and fireproof design, the ball valve is not only suitable for ordinary fluid medium, but also especially suitable for high-temperature, flammable or solid particle containing working conditions, which widens the application field.

[0006] Preferably, the fireproof rope is arranged above the sealing ring, and a plurality of O-rings in sealing connection with the valve body are arranged behind the fireproof rope. The fireproof rope is arranged above the sealing ring, which further improves the sealing effect on the basis of the first sealing formed by the sealing ring and the valve disc. The arrangement of the O-rings provides an additional sealing layer in sealing connection with the valve body, forms a multiple sealing structure and greatly reduces the risk of medium leakage.

[0007] Preferably, the support ring is provided with a horizontally arranged mounting groove, and a spring is arranged in the mounting groove, one end of the spring abutting against the bottom of the mounting groove and the other end abutting against the inner wall of the valve seat. The horizontally arranged mounting groove in the support ring is provided with a spring, one end of the spring abutting against the bottom of the mounting groove and the other end abutting against the inner wall of the valve seat, forming an elastic support structure. This design can dynamically adjust the position of the valve seat according to the change of the medium pressure, thereby maintaining the close contact between the sealing ring and the valve disc and improving the sealing effect. The elastic effect of the spring can effectively buffer the direct force of the valve seat caused by external impact or medium pressure fluctuation, reduce the stress intensity of the valve seat and other key components, and prolong the service life of the components.

[0008] Further, the valve body is provided with a first grease injection valve and a first grease injection channel communicated with the mounting groove. The first grease injection valve on the valve body is communicated with the mounting groove through the first grease injection channel, which can timely provide lubricating grease into the spring and the mounting groove, effectively reduce the friction between the spring and the mounting groove, reduce the wear of the components, and prolong the service life of the ball valve. The lubricating grease not only has lubricating effect, but also has sealing effect. By injecting lubricating grease through the first grease injection channel, the gap in the mounting groove can be further filled, the sealing performance between the mounting groove and the spring can be enhanced, external impurities or medium can be prevented from entering, and stable operation of the valve for a long time can be ensured.

[0009] Further, the first grease injection channel is L-shaped and communicated with the medium channel. The first grease injection channel is L-shaped and communicated with the medium channel, which can realize automatic cleaning of the grease injection channel through the flow of the medium, avoid long-term accumulation or solidification of the lubricating grease, keep the channel unobstructed, and reduce the maintenance difficulty caused by blockage.

[0010] Preferably, the valve body is provided with a mounting step for mounting the support ring, and the end of the support ring is provided with a dust rope abutting against the end face of the mounting step. The dust rope is arranged at the end of the support ring and abuts against the end face of the mounting step, forming a physical barrier, which can effectively prevent external dust, particulate matter or other impurities from entering the inside of the valve body, protect the key components of the valve, and improve the overall sealing performance. The dust rope can reduce the erosion of the support ring and other internal components caused by external pollution, reduce the wear and aging speed, thereby prolonging the service life of the ball valve, especially in the working environment with more dust. The dust rope forms a close connection between the end of the support ring and the end face of the mounting step, not only prevents the displacement of the support ring caused by vibration or pressure fluctuation during operation, but also further stabilizes the combination of the support ring and the valve body, and improves the overall stability of the valve.

[0011] Preferably, the valve stem is sleeved with an upper shaft sleeve matched with the valve body, and the upper shaft sleeve is provided with a second grease injection valve and a second grease injection channel communicated with the valve stem. The upper shaft sleeve sleeved on the valve stem is directly communicated with the valve stem through the second grease injection valve and the second grease injection channel, so that the lubricating grease can be injected in time to the contact surface between the valve stem and the upper shaft sleeve, effectively reducing the friction, ensuring the flexible rotation of the valve stem and improving the operation efficiency. The injection of the lubricating grease not only plays a lubricating role, but also can fill the small gap between the valve stem and the upper shaft sleeve, further enhancing the dynamic sealing performance and preventing the medium from leaking along the valve stem. The lubricating grease has the characteristics of waterproof and corrosion resistance, and by injecting the lubricating grease through the second grease injection channel, the contact between the surface of the valve stem and the corrosive medium in the outside environment can be effectively isolated, the valve stem is prevented from rusting or corroding, and the reliability of the valve stem assembly is improved.

[0012] Further, the upper shaft sleeve is provided with a packing, and the packing is installed with a packing gland. The packing is arranged in the upper shaft sleeve and is compressed by the packing gland, forming a reliable dynamic sealing structure. The packing closely adheres to the inner wall of the valve stem and the upper shaft sleeve, effectively preventing the medium from leaking along the valve stem and further improving the sealing performance of the valve. The packing gland can dynamically compensate the weakening of the sealing effect of the packing due to wear or high temperature deformation by adjusting the compression force, ensuring the stable sealing performance under high pressure, high temperature or low temperature working conditions.

[0013] Further, the valve stem is sleeved with a plurality of O-rings in sealing connection with the upper shaft sleeve. The valve stem is sleeved with a plurality of O-rings in sealing connection with the upper shaft sleeve, forming a multi-layer sealing structure, which cooperates with the packing and the packing gland to further enhance the sealing performance between the valve stem and the upper shaft sleeve, effectively preventing the leakage of the medium. The O-rings can adapt to high pressure working conditions by elastic deformation to absorb the influence of pressure fluctuations on the sealing structure, prevent sealing failure caused by pressure changes, and ensure the safe operation of the valve in high pressure environment.

[0014] Preferably, the medium channel is provided with a blowdown valve located at the valve disc, and the blowdown valve is arranged at the upper and lower ends of the valve disc. The blowdown valves arranged at the upper and lower ends of the valve disc in the medium channel can independently blow down the medium area around the valve disc, quickly clean the deposits, impurities or dirt in the pipeline, and avoid the influence of medium pollution on the normal operation of the valve. Regularly removing the dirt through the blowdown valve can reduce the wear or corrosion of the valve disc, the sealing surface and related components caused by solid particles or corrosive substances in the medium, thereby prolonging the service life of the valve.

[0015] The ball valve has the advantages that the fireproof rope in the valve seat component is designed to abut against the valve body, and can effectively prevent the flame or high-temperature gas from spreading along the sealing part in a fire or high-temperature environment through the material high-temperature resistance and structural design, thereby improving the fireproof capability of the ball valve. The fireproof rope not only has the fireproof function, but also can block the dust and particulate matter from entering the inside of the valve seat component to some extent, reduces the medium pollution, and guarantees the stable operation of the system. Through the combination of the hard sealing and the fireproof design, the ball valve is not only suitable for the ordinary fluid medium, but also is particularly suitable for the working condition environment of high temperature, flammability or containing solid particles, thereby widening the application field. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Fig. 1 is the main structure diagram of the present application;

[0018] Fig. 2 is the detail enlarged view of the valve seat structure in the present application;

[0019] Fig. 3 is the detail enlarged view of the valve stem in the present application;

[0020] In the figure, 1, valve body; 11, medium channel; 12, mounting step; 2, valve flap; 21, blowdown valve; 3, valve stem; 31, upper shaft sleeve; 32, second grease injection valve; 33, second grease injection channel; 34, packing; 35, packing gland; 4, support ring; 41, mounting groove; 42, sealing ring; 43, fireproof rope; 44, O-ring; 45, spring; 46, dustproof rope; 47, first grease injection valve; 48, first grease injection channel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further describe the present application in combination with the drawings.

[0022] It should be noted that all the expressions of "first" and "second" in the embodiments of the present application are used to distinguish two same name but different entities or different parameters, and it can be seen that "first" and "second" are only for the convenience of description, and should not be understood as the limitation of the embodiments of the present application, and the subsequent embodiments will not be described one by one.

[0023] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] like Figs. 1-3 The illustration shows an embodiment of a fixed flange ball valve according to this utility model, comprising a valve body 1, a medium passage 11, a valve disc 2, and a valve stem 3. The valve body 1 has valve seat components on both sides for forming a seal with the valve disc 2. Each valve seat component includes a support ring 4 that mates with the valve body 1. The support ring 4 has a sealing ring 42 that abuts against the valve disc 2. A fireproof rope 43, which abuts against the valve body 1, is fitted onto the support ring 4. The fireproof rope 43 in the valve seat component, abutting against the valve body 1, effectively prevents the spread of flames or high-temperature gases along the sealing area in fire or high-temperature environments through its high-temperature resistance and structural design, thus improving the fire resistance of the ball valve. The fireproof rope 43 not only has fireproof functionality but also, to a certain extent, prevents dust and particulate matter from entering the valve seat component, reducing medium contamination and ensuring stable system operation. Through the combination of hard sealing and fireproof design, this ball valve is not only suitable for ordinary fluid media but also particularly suitable for high-temperature, flammable, or solid particle-containing working environments, broadening its application range.

[0025] The fireproof rope 43 is positioned above the sealing ring 42, and several O-rings 44 are located behind the fireproof rope 43 for sealing connection with the valve body 1. The fireproof rope 43, positioned above the sealing ring 42, further enhances the sealing effect on top of the initial seal formed by the sealing ring 42 and the valve disc 2. The arrangement of the O-rings 44, sealingly connected with the valve body 1, provides an additional sealing layer, forming a multi-layer sealing structure and significantly reducing the risk of media leakage.

[0026] The support ring 4 has a horizontally arranged mounting groove 41, and a spring 45 is installed inside the mounting groove 41. One end of the spring 45 abuts against the bottom of the mounting groove 41, and the other end abuts against the inner wall of the valve seat, forming an elastic support structure. This design can dynamically adjust the position of the valve seat according to changes in medium pressure, thereby maintaining tight contact between the sealing ring 42 and the valve disc 2 and improving the sealing effect. The elasticity of the spring 45 can effectively buffer the direct force of external impact or medium pressure fluctuations on the valve seat, reduce the stress on the valve seat and other key components, and extend the service life of the components.

[0027] The valve body 1 is provided with a first grease injection valve 47 and a first grease injection channel 48 communicating with the mounting groove 41. The first grease injection valve 47 on the valve body 1 communicates with the mounting groove 41 through the first grease injection channel 48, which can provide lubricating grease to the spring 45 and the mounting groove 41 in time, effectively reduce the friction between the spring 45 and the mounting groove 41, reduce the wear of the parts, and prolong the service life of the ball valve. The lubricating grease not only has lubricating effect, but also has sealing effect. By injecting lubricating grease through the first grease injection channel 48, the gap in the mounting groove 41 can be further filled, the sealing performance between the mounting groove 41 and the spring 45 can be enhanced, external impurities or medium can be prevented from entering, and the stable operation of the valve for a long time can be ensured.

[0028] The first grease injection channel 48 is L-shaped and communicates with the medium channel 11. The first grease injection channel 48 is L-shaped and communicates with the medium channel 11, and the automatic cleaning of the grease injection channel can be realized through the flow of medium, the long-term accumulation or solidification of lubricating grease can be avoided, the channel can be kept unobstructed, and the difficulty of maintenance caused by blockage can be reduced.

[0029] The valve body 1 is provided with a mounting step 12 for mounting the support ring 4, and the end of the support ring 4 is provided with a dustproof rope 46 abutting against the end face of the mounting step 12. The dustproof rope 46 is arranged at the end of the support ring 4 and tightly abuts against the end face of the mounting step 12, forming a physical barrier, which can effectively prevent external dust, particulate matter or other impurities from entering the inside of the valve body 1, protect the key components of the valve, and improve the overall sealing performance. The dustproof rope 46 can reduce the erosion of the support ring 4 and other internal components by external pollution, reduce the wear and aging speed, thereby prolonging the service life of the ball valve, especially in the working environment with more dust. The dustproof rope 46 forms a tight connection between the end of the support ring 4 and the end face of the mounting step 12, which not only prevents the support ring 4 from being displaced due to vibration or pressure fluctuation during operation, but also further stabilizes the combination of the support ring 4 and the valve body 1, improving the overall stability of the valve.

[0030] The valve stem 3 is sleeved with an upper shaft sleeve 31 matched with the valve body 1, and the upper shaft sleeve 31 is provided with a second grease injection valve 32 and a second grease injection channel 33 communicating with the valve stem 3. The upper shaft sleeve 31 sleeved on the valve stem 3 directly communicates with the valve stem 3 through the second grease injection valve 32 and the second grease injection channel 33, which can inject lubricating grease to the contact surface between the valve stem 3 and the upper shaft sleeve 31 in time, effectively reduce friction, ensure flexible rotation of the valve stem 3, and improve operation efficiency. The injection of lubricating grease not only has lubricating effect, but also can fill the small gap between the valve stem 3 and the upper shaft sleeve 31, further enhance the dynamic sealing performance, and prevent the medium from leaking along the valve stem 3. The lubricating grease has the characteristics of waterproof and corrosion resistance, and the injection of lubricating grease through the second grease injection channel 33 can effectively isolate the surface of the valve stem 3 from the contact with corrosive medium in the outside world, prevent the valve stem 3 from rusting or corroding, and improve the reliability of the valve stem 3 assembly.

[0031] The upper shaft sleeve 31 is internally provided with a packing 34, and the packing 34 is mounted with a packing 34 gland. The packing 34 is arranged in the upper shaft sleeve 31 and is compressed by the packing 34 gland, thereby forming a reliable dynamic sealing structure. The packing 34 closely fits the valve stem 3 and the inner wall of the upper shaft sleeve 31, effectively preventing medium leakage along the valve stem 3, and further improving the sealing performance of the valve. The packing 34 gland can dynamically compensate for the weakening of the sealing effect of the packing 34 due to wear or high temperature deformation by adjusting the compression force, thereby ensuring stable sealing performance under high pressure, high temperature or low temperature working conditions.

[0032] The valve stem 3 is sleeved with a plurality of O-rings 44 in sealing connection with the upper shaft sleeve 31. The plurality of O-rings 44 sleeved on the valve stem 3 are in sealing connection with the upper shaft sleeve 31, forming a multi-layer sealing structure that cooperates with the packing 34 and the packing 34 gland to further enhance the sealing performance between the valve stem 3 and the upper shaft sleeve 31, effectively preventing medium leakage. The O-rings 44 can adapt to high pressure working conditions by elastically deforming to absorb the influence of pressure fluctuations on the sealing structure, preventing sealing failure caused by pressure changes and ensuring safe operation of the valve in a high pressure environment.

[0033] The medium channel 11 is internally provided with a blowdown valve 21 located at the valve disc 2, and the blowdown valve 21 is arranged at the upper and lower ends of the valve disc 2. The blowdown valve 21 is arranged at the upper and lower ends of the valve disc 2 in the medium channel 11, which can independently blow down the medium area around the valve disc 2, quickly clean the deposits, impurities or dirt in the pipeline, and avoid the influence of medium pollution on the normal operation of the valve. Regularly removing dirt through the blowdown valve 21 can reduce the wear and corrosion of the valve disc 2, the sealing surface and related components caused by solid particles or corrosive substances in the medium, thereby prolonging the service life of the valve.

[0034] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the present application. Therefore, equivalent changes made according to the claims of the present application still fall within the scope of the present application.

[0035] Although the present application has been described with reference to several specific embodiments, it should be understood that the present application is not limited to the disclosed specific embodiments. The present application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A fixed flanged ball valve characterized by: Including valve body, medium channel, valve clapper and valve rod, both sides of the valve body are provided with valve seat parts for cooperating with the valve clapper to form a seal, the valve seat parts include a support ring cooperating with the valve body, the support ring is provided with a sealing ring abutting against the valve clapper, and the support ring is sleeved with a fireproof rope abutting against the valve body.

2. The fixed flanged ball valve of claim 1, wherein: The fireproof rope is arranged above the sealing ring, and a plurality of O-rings in sealing connection with the valve body are arranged at the rear of the fireproof rope.

3. The fixed flanged ball valve of claim 1, wherein: A horizontally arranged mounting groove is arranged on the support ring, a spring is arranged in the mounting groove, one end of the spring abuts against the bottom of the mounting groove, and the other end abuts against the inner wall of the valve seat.

4. The fixed flanged ball valve of claim 3, wherein: A first grease injection valve and a first grease injection channel in communication with the mounting groove are arranged on the valve body.

5. The fixed flanged ball valve of claim 4, wherein: The first grease injection channel is in L-shaped communication with the medium channel.

6. The fixed flanged ball valve of claim 1, wherein: A mounting step for mounting the support ring is arranged on the valve body, and a dustproof rope abutting against the end face of the mounting step is arranged at the end of the support ring.

7. The fixed flanged ball valve of claim 1, wherein: An upper shaft sleeve cooperating with the valve body is sleeved on the valve rod, a second grease injection valve and a second grease injection channel in communication with the valve rod are arranged on the upper shaft sleeve.

8. The fixed flanged ball valve of claim 7, wherein: A packing is arranged in the upper shaft sleeve, and a packing gland is mounted on the packing.

9. The fixed flanged ball valve of claim 7, wherein: A plurality of O-rings in sealing connection with the upper shaft sleeve are sleeved on the valve rod.

10. The fixed flanged ball valve of claim 1, wherein: A blowdown valve is arranged in the medium channel at the valve clapper, and the blowdown valve is arranged at the upper and lower ends of the valve clapper.

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