Hard sealing floating ball valve for coal tar and residual oil hydrogenation device

Abstract

The hard sealing floating ball valve for the coal tar and residual oil hydrogenation device comprises a main valve body and an auxiliary valve body, a valve body cavity is arranged in the main valve body, the main valve body and the auxiliary valve body are installed in a butt joint mode, and a butt joint sealing structure is arranged between the main valve body and the auxiliary valve body. The butt-joint sealing structure is arranged between the main valve body and the auxiliary valve body, elastic self-tightening sealing can be achieved through the butt-joint sealing structure, and external sealing failure caused by fastener looseness due to temperature and pressure alternation can be effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball valves, and particularly relates to a hard-sealed floating ball valve for coal tar and residue oil hydrogenation units. Background Art

[0002] In the field of valves used in the coal chemical and petrochemical industries, especially for hard-sealed floating ball valves used in coal tar and residue oil hydrogenation units, a metal wound gasket sealing structure or a non-elastic self-tightening metal ring or a wire-sealed C-shaped metal sealing ring is generally adopted, and there are valve body sealing leakage accidents and risks caused by solid particles or temperature and pressure alternation.

[0003] For the existing hard-sealed floating ball valve used in coal tar and residue oil hydrogenation units, a metal wound gasket sealing structure or a non-elastic self-tightening metal ring is adopted for sealing between the main valve body and the sub-valve body. When the valve body and fasteners are subjected to high and low temperature alternation, it is easy for oil products to leak between the main valve body and the sub-valve body. Summary of the Utility Model

[0004] In view of the above problems existing in the prior art, the purpose of the embodiment of the utility model is to provide a hard-sealed floating ball valve for coal tar and residue oil hydrogenation units.

[0005] The technical solution adopted in the embodiment of the utility model is a hard-sealed floating ball valve for coal tar and residue oil hydrogenation units, which includes a main valve body and a sub-valve body. A valve body cavity is arranged in the main valve body. The main valve body and the sub-valve body are butt-jointed and installed. A butt-joint sealing structure is arranged between the main valve body and the sub-valve body. The butt-joint sealing structure includes a sealing ring, a first annular groove and a second annular groove. The first annular groove and the second annular groove are respectively opened on the butting end faces of the main valve body and the sub-valve body. The sealing ring cooperates with the first annular groove and the second annular groove. When the main valve body and the sub-valve body are butted, the openings of the first annular groove and the second annular groove are opposite. The groove walls of the first annular groove and the second annular groove away from the valve body cavity are inclined, so that both the first annular groove and the second annular groove have a width at the opening greater than the width at the bottom. When the main valve body and the sub-valve body are butted, the sealing ring is placed in the first annular groove and the second annular groove.

[0006] Furthermore, elastic flanks for cooperating with the first annular groove and the second annular groove are constructed on both sides of the sealing ring.

[0007] Furthermore, extension grooves are arranged on the butting end faces of the main valve body and the sub-valve body. One side of the first annular groove / second annular groove away from the valve body cavity is communicated with the extension groove. The depth of the extension groove is less than the depths of the first annular groove and the second annular groove. When the main valve body and the sub-valve body are butted, the openings of the extension grooves on them are opposite.

[0008] Further, a self-aligning back ring is provided on the sealing ring. The self-aligning back ring cooperates with the extension groove, and when the main valve body and the sub-valve body are butted, the self-aligning back ring is inserted into the extension groove.

[0009] Further, a flushing channel is provided on the main valve body. The flushing channel communicates with the valve body cavity, and a sealing switch is installed on the flushing channel to control the on-off of the flushing channel.

[0010] Further, a valve ball is installed in the inner cavity of the valve body cavity. A valve stem is installed on the main valve body. The valve stem is connected to the valve ball and drives the valve ball. Disc springs are provided on both sides of the valve ball. One end of the disc spring close to the valve ball is connected to a valve seat. The disc springs on both sides of the valve ball respectively abut against the inner wall of the valve body cavity and the inner wall of the sub-valve body at the ends away from the valve ball. The valve ball is held tightly by the valve seats on both sides of it, and the outer edge of the valve seat is in close contact with the inner wall of the valve body cavity.

[0011] Compared with the prior art, a hard-sealed floating ball valve for a coal tar and residue oil hydrogenation device proposed by the present utility model is provided with a butt joint sealing structure between the main valve body and the sub-valve body. The elastic self-tightening seal can be realized by using the butt joint sealing structure, which can effectively prevent the fastening piece from loosening caused by the alternating temperature and pressure and further cause the outer seal to fail.

[0012] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present utility model.

[0013] The summary of various implementations or examples of the technology described in the present utility model is not an exhaustive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the drawings, which are not necessarily to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to illustrate the embodiments of the present utility model. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended as an exhaustive or exclusive embodiment of the present device or method.

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the butt joint sealing structure of an embodiment of the present utility model.

[0017] Figure 3Schematic diagram of the butt joint sealing structure without a sealing ring installed. Detailed implementation mode

[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present utility model with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] In order to keep the following description of the embodiments of the present utility model clear and concise, detailed descriptions of known functions and known components are omitted in the present utility model.

[0021] Refer to Figures 1 to 3, an embodiment of the present utility model provides a hard-sealed floating ball valve for a coal tar and residue oil hydrogenation device, which includes a main valve body 100 and a sub-valve body 200. A valve body cavity is arranged in the main valve body 100. The main valve body 100 and the sub-valve body 200 are butt-jointed and installed. A butt-joint sealing structure 112 is arranged between the main valve body 100 and the sub-valve body 200. The butt-joint sealing structure 112 includes a sealing ring 1121, a first annular groove 1122 and a second annular groove 1123. The first annular groove 1122 and the second annular groove 1123 are respectively formed on the butting end faces of the main valve body 100 and the sub-valve body 200. The sealing ring 1121 cooperates with the first annular groove 1122 and the second annular groove 1123. When the main valve body 100 and the sub-valve body 200 are butted, the openings of the first annular groove 1122 and the second annular groove 1123 are opposite to each other. The groove walls of the first annular groove 1122 and the second annular groove 1123 away from the valve body cavity are inclined, so that both the first annular groove 1122 and the second annular groove 1123 have a width of the groove opening greater than the width of the groove bottom. When the main valve body 100 and the sub-valve body 200 are butted, the sealing ring 1121 is placed in the first annular groove 1122 and the second annular groove 1123. In this technical solution, a butt-joint sealing structure 112 is arranged between the main valve body 100 and the sub-valve body 200. The butt-joint sealing structure 112 can achieve elastic self-tightening sealing, and can effectively prevent the external sealing failure caused by the relaxation of the fasteners due to the alternating temperature and pressure. When the valve body works, the sealing ring 1121 is affected by the pressure in the valve body. The pressure in the valve body pushes the sealing ring 1121 outwards. At the same time, under the guiding action of the inclined groove walls of the first annular groove 1122 and the second annular groove 1123, the sealing ring 1121 blocks the gap between the butting ends of the main valve body 100 and the sub-valve body 200. And the inclined groove walls of the first annular groove 1122 and the second annular groove 1123 can increase the contact surface between the sealing ring 1121 and the main valve body 100 and the sub-valve body 200, which helps to improve the sealing effect.

[0022] Elastic flanks are constructed on both sides of the sealing ring 1121 to cooperate with the first annular groove 1122 and the second annular groove 1123. The elastic flanks can deform, which helps the sealing ring 1121 to contact the inclined groove walls of the first annular groove 1122 and the second annular groove 1123, and improves the sealing effect.

[0023] On the butt - joint end faces of the main valve body 100 and the auxiliary valve body 200, extension grooves 1124 are provided. On the side of the first annular groove 1122 / the second annular groove 1123 away from the valve body cavity, they are communicated with the extension grooves 1124. The depth of the extension grooves 1124 is less than the depths of the first annular groove 1122 and the second annular groove 1123. When the main valve body 100 and the auxiliary valve body 200 are butted, the orifices of the extension grooves 1124 on them are opposite. The elastic flanks are deformed under the influence of the pressure inside the valve body, so that the sealing ring 1121 extends into the extension grooves 1124 to enhance the sealing effect.

[0024] On the sealing ring 1121, a self - centering back ring 1120 is provided. The self - centering back ring 1120 cooperates with the extension groove 1124. When the main valve body 100 and the auxiliary valve body 200 are butted, the self - centering back ring 1120 is inserted into the extension groove 1124. The self - centering back ring 1120 guides the sealing ring 1121 to extend into the extension groove 1124.

[0025] On the main valve body 100, a flushing channel 800 is provided. The flushing channel 800 is communicated with the valve body cavity, and a sealing switch is installed on the flushing channel 800 to control the on - off of the flushing channel 800. The flushing channel 800 is used to introduce heat sources to soften and flush the scale or coke in the valve body cavity.

[0026] A valve sphere 300 is installed in the inner cavity of the valve body cavity. A valve rod 400 is installed on the main valve body 100. The valve rod 400 is connected to the valve sphere 300. The valve rod 400 drives the valve sphere 300. Disc springs 600 are arranged on both sides of the valve sphere 300. One end of the disc spring 600 close to the valve sphere 300 is connected to a valve seat 500. The ends of the disc springs 600 on both sides of the valve sphere 300 away from the valve sphere 300 respectively abut against the inner wall of the valve body cavity and the inner wall of the auxiliary valve body 200. The valve sphere 300 is held tightly by the valve seats 500 on both sides of it. The outer edge of the valve seat 500 is in close contact with the inner wall of the valve body cavity. Under the elastic force of the disc springs 600, the valve seats 500 hold the valve sphere 300 tightly, so that the valve seats 500 and the valve sphere 300 remain in close contact, preventing the outer seal failure caused by the relaxation of the valve seats 500 and the valve sphere 300 due to the alternating temperature and pressure.

[0027] The above description is intended to be illustrative rather than restrictive. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above - mentioned embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of their solutions) can be used in combination with each other, and considering these embodiments, they can be combined and arranged with each other in various combinations.

Claims

1. A hard-sealed floating ball valve for a coal tar and residual oil hydrogenation device, comprising a main valve body (100) and an auxiliary valve body (200), wherein a valve body cavity is arranged in the main valve body (100), and the main valve body (100) and the auxiliary valve body (200) are butt-jointed and installed, characterized in that: A butt sealing structure (112) is provided between the main valve body (100) and the auxiliary valve body (200), and the butt sealing structure (112) comprises a sealing ring (1121), a first annular groove (1122) and a second annular groove (1123), wherein the first annular groove (1122) and the second annular groove (1123) are respectively provided on the butt end surfaces of the main valve body (100) and the auxiliary valve body (200), and the sealing ring (1121) cooperates with the first annular groove (1122) and the second annular groove (1123), and the main valve body When the main valve body (100) and the auxiliary valve body (200) are docked, the first annular groove (1122) and the second annular groove (1123) are opposite to each other, and the first annular groove (1122) and the second annular groove (1123) are inclined away from the groove wall of the valve body cavity, so that the groove width of the first annular groove (1122) and the second annular groove (1123) are greater than the groove bottom width, and when the main valve body (100) and the auxiliary valve body (200) are docked, the sealing ring (1121) is placed in the first annular groove (1122) and the second annular groove (1123).

2. The hard-sealed floating ball valve for coal tar and residual oil hydrogenation equipment according to claim 1 is characterized in that: Both sides of the sealing ring (1121) are configured with elastic side wings that match the first annular groove (1122) and the second annular groove (1123).

3. The hard-sealed floating ball valve for coal tar and residual oil hydrogenation equipment according to claim 2 is characterized in that: An extension groove (1124) is provided on the butted end surfaces of the main valve body (100) and the auxiliary valve body (200); the first annular groove (1122) / the second annular groove (1123) is connected to the extension groove (1124) on the side away from the valve body cavity; the depth of the extension groove (1124) is smaller than the depth of the first annular groove (1122) and the second annular groove (1123); when the main valve body (100) and the auxiliary valve body (200) are butted, the notches of the extension grooves (1124) thereon are opposite.

4. The hard-sealed floating ball valve for coal tar and residual oil hydrogenation equipment according to claim 3 is characterized in that: The sealing ring (1121) is provided with a self-aligning back ring (1120), and the self-aligning back ring (1120) cooperates with the extension groove (1124). When the main valve body (100) and the auxiliary valve body (200) are connected, the self-aligning back ring (1120) is inserted into the extension groove (1124).

5. The hard-sealed floating ball valve for coal tar and residual oil hydrogenation equipment according to claim 1 is characterized in that: The main valve body (100) is provided with a flushing channel (800), the flushing channel (800) is connected to the valve body cavity, and a sealing switch is installed on the flushing channel (800) to control the on and off of the flushing channel (800).

6. The hard-sealed floating ball valve for coal tar and residual oil hydrogenation equipment according to claim 1 is characterized in that: A valve ball (300) is installed in the inner cavity of the valve body cavity, a valve stem (400) is installed on the main valve body (100), the valve stem (400) is connected to the valve ball (300), the valve stem (400) drives the valve ball (300), disc springs (600) are arranged on both sides of the valve ball (300), one end of the disc spring (600) close to the valve ball (300) is connected to a valve seat (500), and the ends of the disc springs (600) on both sides of the valve ball (300) away from the valve ball (300) are respectively pressed against the inner wall of the valve body cavity and the inner wall of the auxiliary valve body (200), the valve ball (300) is held tightly by the valve seats (500) on both sides thereof, and the outer edges of the valve seats (500) are in close contact with the inner wall of the valve body cavity.

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