Liquid metal sealing valve with heating top cover for high-temperature environment

Abstract

The utility model provides a liquid metal sealing valve with a heating top cover for a high-temperature environment, and relates to the technical field of sealing valves. A plurality of heating assemblies are arranged on the inner side of the top cover; and the plurality of heating assemblies are positioned on the top cover and above the isolation hood. The heating top cover can be suitable for a liquid metal sealing valve, the environment temperature of the cavity in the valve body is heated to the gas temperature through the heating assembly, and coal tar is prevented from being separated out when high-temperature gas is condensed. The technical problems that in the prior art, a cavity of a valve body of a liquid metal sealing valve cannot be heated, tar in coal gas is condensed and separated into liquid tar, the separated liquid tar becomes coking matter, the coking matter is attached to an inner cavity of the sealing valve and the surface of a valve rod, and use of the valve body is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing valves, in particular to a liquid metal sealing valve for high-temperature environments with a heating top cover. Background Art

[0002] In order to achieve the tight closing of the sealing valve during the dust removal switching of the high-temperature gas generated by coal pyrolysis, Chinese Patent No. CN103629381A, a liquid metal sealing valve for gas pipelines in high-temperature environments, and Chinese Patent No. CN103615586A, an improved liquid metal sealing valve for gas pipelines in high-temperature environments, both adopt the method of arranging a liquid metal sealing groove for pouring at the bottom of the valve body, matching an isolation cover and other necessary structures to achieve the absolute sealing of high-temperature gas. However, when the high-temperature gas enters the intake chamber and the outlet chamber at a lower temperature, the tar in the gas condenses into liquid tar. In the subsequent normal high-temperature gas environment, the volatile components in the liquid tar will volatilize, turning the precipitated liquid tar into coke deposits. The coke deposits adhere to the inner cavity of the sealing valve and the surface of the valve stem, affecting the flexibility of the valve stem movement, the effectiveness of liquid sealing, and reducing the service life of the valve. Although both solutions disclose the setting of a heating mechanism on the outer periphery of the valve body, since the heat insulation layers of the two disclosures are arranged inside the valve body, the outer heating mechanism cannot effectively heat the inside of the valve body, and thus the phenomenon of coke precipitation cannot be truly avoided. How to reduce or even avoid the precipitation of tar in the gas in the sealing valve and improve the service life of the sealing valve has become a problem to be solved.

[0003] In view of this, this solution is specifically proposed. Summary of the Utility Model

[0004] One of the purposes of the utility model is to provide a top cover for a liquid metal sealing valve. By arranging a plurality of heating components inside the heating top cover of the liquid metal sealing valve, the technical problem in the prior art that the liquid metal sealing valve cannot heat the cavity of the valve body, resulting in the condensation of tar in the gas into liquid tar, the precipitated liquid tar turning into coke deposits, and the coke deposits adhering to the inner cavity of the sealing valve and the surface of the valve stem, affecting the use of the valve body, is solved.

[0005] Another purpose of the utility model is to provide a liquid metal sealing valve for high-temperature environments with a heating top cover.

[0006] In the first aspect, the utility model provides a top cover for a liquid metal sealing valve, and a plurality of heating components are arranged inside the top cover;

[0007] The plurality of heating components are located on the top cover and above the isolation cover.

[0008] Further, the heating assembly includes a heating tube and a power control unit. The heating tube is disposed on the top cover, and the power control unit is electrically connected to the heating tube.

[0009] Further, one end of the heating tube is located inside the top cover, and the other end penetrates through the top cover and is electrically connected to the power control unit.

[0010] Further, the heating tube is a single-ended heating tube. The upper end of the outer shell of the single-ended heating tube is connected to the top cover, and the heating wire of the single-ended heating tube is electrically connected to the power control unit through a lead or a terminal provided on the outer shell of the single-ended heating tube.

[0011] Further, the power control unit includes a power supply and a temperature controller.

[0012] In a second aspect, the present utility model provides a liquid metal sealing valve for use in a high-temperature environment with a heating top cover, including the aforementioned top cover. The top cover is located at the top end of the valve body, and a plurality of the heating assemblies are located inside the valve body.

[0013] Further, it further includes a liquid seal groove located at the bottom of the valve body, a shielding cover matching the liquid seal groove, and a lifting drive system located at the top end of the top cover.

[0014] Further, it further includes an intake chamber communicating with the intake port and an exhaust chamber communicating with the exhaust port. The heating assembly is located inside the exhaust chamber.

[0015] Further, the output end of the lifting drive system penetrates through the top cover and is connected to the shielding cover.

[0016] Further, the edge of the top cover is connected to the top end of the valve body by bolts.

[0017] A top cover for a liquid metal sealing valve provided by the present utility model heats the inner cavity of the sealed valve body by arranging a heating assembly on the inner side of the top cover. When the top cover is used to seal the valve body, the inner side surface provided with the heating assembly faces the inner cavity of the valve body, so that the heating assembly is located inside the sealed valve body, achieving the purpose of heating the inside of the sealed valve body; the heating assembly is arranged in the inner cavity of the top cover and above the shielding cover to prevent the heating assembly from affecting the upward movement of the shielding cover when the sealing valve is opened. The heating top cover can be applied to a liquid metal sealing valve. The ambient temperature of the inner cavity of the valve body is heated to the gas temperature by the heating assembly, preventing high-temperature gas from condensing and precipitating coal tar when encountering cold.

[0018] On the other hand, a liquid metal seal valve for high-temperature environments with a heating top cover is provided. By using the aforementioned top cover, the ambient temperature in the inner cavity of the valve body is heated to the gas temperature to prevent coal tar from condensing out when high-temperature gas meets cold. Direct heating in the chamber is adopted, which has higher heating efficiency. In addition, the overall structure is simple and convenient for maintenance. It solves the technical problem in the prior art that the liquid metal seal valve cannot heat the inner cavity of the valve body, resulting in the tar in the gas condensing into liquid tar, and the precipitated liquid tar becoming coke deposits, which adhere to the inner cavity of the seal valve and the surface of the valve stem, affecting the use of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a liquid metal seal valve for high-temperature environments with a heating top cover provided in Embodiment 2 of the present invention;

[0021] Figure 2 FIG. 2 is a schematic top view of a liquid metal seal valve for high-temperature environments with a heating top cover provided in Embodiment 2 of the present invention.

[0022] Reference numerals: 1 - lifting drive system; 2 - liquid seal groove; 3 - isolation cover; 4 - top cover; 5 - heating tube; 6 - power control unit; 7 - intake chamber; 8 - exhaust chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meanings and scopes of the terms should be clear. However, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or extrinsic definition. In this application, unless otherwise specified, the use of "or" means "and / or". In addition, the use of the term "comprising" and other forms is non-restrictive.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "proximal end", "distal end", "front end", "rear end", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0025] Terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] On the one hand, the present utility model provides a heating top cover for a liquid metal sealing valve. A plurality of heating components are provided inside the top cover 4;

[0028] The plurality of heating components are located on the top cover 4 and above the isolation cover 3.

[0029] By arranging heating components inside the top cover 4, when the top cover 4 is used to seal the valve body, the inner side surface with the heating components faces the inner cavity of the valve body, so that the heating components are located inside the sealed valve body, achieving the purpose of heating the inside of the sealed valve body; the heating components are arranged in the inner cavity of the top cover 4 and above the isolation cover 3, avoiding the influence of the heating components on the upward movement of the isolation cover 3 when the sealing valve is opened. The heating top cover can be applied to a liquid metal sealing valve, and the ambient temperature in the inner cavity of the valve body is heated to the gas temperature by the heating components, preventing the high-temperature gas from condensing and precipitating coal tar. It solves the technical problem in the prior art that the liquid metal sealing valve cannot heat the valve body cavity, causing the tar in the gas to condense and precipitate into liquid tar, and the precipitated liquid tar becomes coking substances, and the coking substances adhere to the inner cavity of the sealing valve and the surface of the valve stem, affecting the use of the valve body.

[0030] The number and installation positions of the heating components can be adjusted according to the size and shape of the inner cavity space of the sealing valve to be applied, so as to heat the temperature of the inner cavity space to the gas temperature without affecting the upward movement of the isolation cover 3 driven by the lifting drive system 1 when the valve is opened.

[0031] In some specific embodiments, the heating component includes a heating tube 5 and a power control unit 6. The heating tube 5 is arranged on the top cover 4, and the power control unit 6 is electrically connected to the heating tube 5.

[0032] The power control unit 6 supplies power to the heating tube 5 and controls the opening or closing of the power supply to prevent the temperature of the inner cavity of the valve body from being lower than or higher than the gas temperature.

[0033] To facilitate the control of the heating tube 5, in some specific embodiments, one end of the heating tube 5 is located inside the top cover 4, and the other end penetrates through the top cover 4 and is electrically connected to the power control unit 6.

[0034] During use, the power control unit 6 is located outside the valve body, and the heating state of the heating tube 5 located inside the valve body is controlled to be turned on or off through the power control unit 6.

[0035] In some specific embodiments, the heating tube 5 is a single-end heating tube. The upper end of the outer shell of the single-end heating tube is connected to the top cover 4, and the heating wire of the single-end heating tube is electrically connected to the power control unit 6 through a lead or terminal arranged on the outer shell of the single-end heating tube.

[0036] In some specific embodiments, the power control unit 6 includes a power supply and a thermostat.

[0037] Among them, the thermostat sets the temperature control. When the temperature is heated to the upper limit of the set temperature, the power supply is cut off, and when the temperature is lower than the lower limit of the set temperature, the power supply is turned on.

[0038] The temperature setting of the thermostat can adjust the working temperature according to process requirements. For example, the temperature of the thermostat can be set to 550±5°C.

[0039] To facilitate installation, in some specific embodiments, the top cover is provided with a through hole coaxially arranged with the top cover. The through hole cooperates with the provided lifting drive system 1, and the valve is opened or sealed through the lifting drive system 1.

[0040] According to another aspect of the present invention, a liquid metal sealing valve for high-temperature environment with a heating top cover is further provided, including the aforementioned top cover 4. The top cover 4 is located at the top end of the valve body, and several heating components are located inside the valve body.

[0041] By using the aforementioned top cover 4, the heating component located inside the valve body can heat the internal cavity of the valve body, heating the ambient temperature of the internal cavity of the valve body to the gas temperature, preventing high-temperature gas from condensing and separating out coal tar. By directly heating inside the chamber, the heating efficiency is higher. In addition, the overall structure is simple and convenient for maintenance. It solves the technical problem in the prior art that the liquid metal seal valve cannot heat the cavity of the valve body, causing the tar in the gas to condense and separate into liquid tar, and the separated liquid tar becomes coke, and the coke adheres to the inner cavity of the seal valve and the surface of the valve stem, affecting the use of the valve body.

[0042] In some specific embodiments, it further includes a liquid seal groove 2 located at the bottom of the valve body, an isolation cover 3 matching the liquid seal groove 2, and a lifting drive system 1 located at the top of the top cover 4.

[0043] In some specific embodiments, it further includes an intake chamber 7 communicated with the intake port and an outlet chamber 8 communicated with the outlet port, and the heating component is located in the outlet chamber 8.

[0044] The isolation cover 3 matches the liquid seal groove 2, dividing the inner cavity of the valve body into two parts. The intake chamber 7 and the outlet chamber 8 are respectively located on both sides of the isolation cover 3, and the heating component heats the outlet chamber 8. When in use, before the seal valve is opened, the heating component is first turned on to heat the outlet chamber 8 to the gas temperature. When the seal valve is opened, the high-temperature gas avoids separating out liquid tar in an environment with a comparable temperature and no coke will appear.

[0045] In some specific embodiments, the output end of the lifting drive system 1 passes through a through hole on the top cover 4 and is connected to the isolation cover 3.

[0046] In some specific embodiments, the edge of the top cover 4 is connected to the top of the valve body by bolts.

[0047] The liquid metal seal valve for high-temperature environment with a heating top cover can be used in the field of purification treatment of high-temperature pyrolysis gas and is applied to the switching of high-temperature gas pipelines.

[0048] Among them, the high temperature specifically refers to 300 - 700 °C, or 400 - 650 °C.

[0049] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0050] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0051] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0052] Embodiment 1

[0053] Combined with Figure 1 and Figure 2 for description, a heating top cover for a liquid metal sealing valve, there are 12 heating components provided inside the top cover 4; the 12 heating components are arranged circumferentially along the top cover 4 and are above the isolation cover 3. The heating component includes a heating tube 5 and a power control unit 6. One end of the heating tube 5 is located inside the top cover 4, and the other end penetrates the top cover 4 and is electrically connected to the power control unit 6.

[0054] Among them, the heating tube 5 is a single-end heating tube, the power of each single-end heating tube is 3KW, the outer shell of the single-end heating tube is connected to the top cover 4, and the heating wire of the single-end heating tube is electrically connected to the power control unit 6 through a terminal. The power control unit 6 includes a power supply and a temperature controller, and the temperature of the temperature controller is set to 550±5°C.

[0055] Embodiment 2

[0056] Combined with Figure 1 and Figure 2 for description, a liquid metal sealing valve for a high-temperature environment with a heating top cover, its valve body is provided with an intake chamber 7 communicating with the intake port and an outlet chamber 8 communicating with the outlet port. A lifting drive system 1 is provided through the top cover 4 at the top of the valve body, a liquid seal groove 2 for pouring liquid metal is provided at the bottom, and an isolation cover 3 matching the liquid seal groove. 12 heating components are distributed circumferentially along the outlet chamber 8.

[0057] Among them, the inner diameter of the outlet chamber 8 of the metal sealing valve is 1800mm and the depth is 1350mm.

[0058] Working principle:

[0059] Before opening the sealing valve, turn on the power supply first to make the single-end heating work to preheat the gas outlet chamber. When the temperature reaches 550±5°C set by the thermostat, turn off the power supply. At this time, the sealing valve can be opened, and the lifting drive system 1 drives the isolation cover 3 to move upward. Since the gas outlet chamber has been preheated to 550±5°C, it avoids the condensation of coal tar when high-temperature gas enters the gas outlet chamber.

[0060] During the use process, since the set temperature of the thermostat is 550±5°C, when the temperature reaches the set temperature, the power supply can be automatically turned off, and when the temperature is lower than the set temperature, the power supply can be automatically turned on to ensure that the preheating temperature of the gas outlet chamber 8 reaches the set temperature during the opening process of the sealing valve, avoiding the condensation of coal tar when high-temperature gas enters the gas outlet chamber 8.

Claims

1. A top cover for a liquid metal sealing valve, characterized in that A plurality of heating components are arranged on the inner side of the top cover (4); A plurality of the heating components are located on the top cover (4) and above the isolation cover (3).

2. The top cover according to claim 1, characterized in that, The heating assembly comprises a heating tube (5) and a power control unit (6); the heating tube (5) is arranged on the top cover (4); and the power control unit (6) is electrically connected to the heating tube (5).

3. The top cover according to claim 2, characterized in that, One end of the heating tube (5) is located on the inner side of the top cover (4), and the other end passes through the top cover (4) and is electrically connected to the power control unit (6).

4. The top cover according to claim 3, characterized in that, The heating tube (5) is a single-ended heating tube, the upper end of the outer shell of the single-ended heating tube is connected to the top cover (4), and the heating wire of the single-ended heating tube is electrically connected to the power control unit (6) via a lead or a terminal arranged on the outer shell of the single-ended heating tube.

5. The top cover according to claim 4, characterized in that, The power control unit (6) comprises a power supply and a temperature controller.

6. A liquid metal sealing valve for high-temperature environment with a heating top cover, characterized in that, It comprises the top cover (4) according to any one of claims 1 to 5, wherein the top cover (4) is located at the top end of the valve body, and a plurality of the heating components are located inside the valve body.

7. The liquid metal seal valve for high temperature environment according to claim 6, characterized in that, It also includes a liquid sealing groove (2) located at the bottom of the valve body, an isolation cover (3) matched with the liquid sealing groove (2), and a lifting drive system (1) located at the top of the top cover (4).

8. The liquid metal sealing valve for high-temperature environment according to claim 7, characterized in that, It also comprises an air inlet chamber (7) communicated with the air inlet and an air outlet chamber (8) communicated with the air outlet, and the heating component is located in the air outlet chamber (8).

9. The liquid metal seal valve for high-temperature environment according to claim 7, characterized in that, The output end of the lifting drive system (1) passes through the connection between the top cover (4) and the isolation cover (3).

10. The liquid metal sealing valve for high-temperature environment according to any one of claims 6 to 8, characterized in that, The edge of the top cover (4) is connected to the top of the valve body via bolts.

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