Gate valve

Abstract

The gate valve comprises a valve body, a valve plate and an executing mechanism, the valve body is provided with a first channel, the valve plate is provided with a second channel, and the executing mechanism drives the valve plate to ascend and descend, so that the first channel and the second channel are matched to form a fluid channel for fluid to pass through. According to the gate valve disclosed by the utility model, the execution structure drives the valve plate to ascend and descend, so that the second channel is matched with the first channel to form the fluid channel through which the fluid passes, and the size of the flow area of the fluid channel can be adjusted, so that the flow of the fluid is linearly adjusted. Compared with the mode of manually replacing the adjusting pore plate in the prior art, the labor intensity can be reduced, and the risk of gas leakage can be reduced. Meanwhile, according to different production stages and different working conditions of the coke oven and according to the mature state of coke in each hole of the carbonization chamber, the flow area of the fluid channel is adjusted, and the amount of gas entering the combustion chamber is dynamically adjusted, so that the gas consumption is reduced, the energy consumption is reduced, and the coke quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a plug-in valve. Background Art

[0002] In recent years, large-scale, efficient and automated modern coke ovens have gradually replaced small and medium-sized coke ovens.

[0003] The heating system in coke oven production operates as follows: Gas is distributed through the main gas pipe to the gas branch pipes of each combustion chamber. Each branch pipe is equipped with a regulating cock, an orifice box, and a replacement cock. The regulating orifice plate is installed in the orifice box, and the gas flow is controlled by the orifice plate. The aperture of the regulating orifice plate varies depending on the coke oven's production status (normal production, extended coking, or normal heating after the oven is finished), but the aperture of the regulating orifice plate is fixed when the production status is the same. Therefore, when changing the coke oven's production status, the orifice box must be manually opened and the regulating orifice plate inside must be replaced. This method is labor-intensive and carries the risk of gas leaks. It is also impossible to adjust the gas flow to a specific combustion chamber based on the actual coke content in each carbonization chamber.

[0004] Therefore, how to regulate the flow of gas and dynamically adjust the amount of gas entering the combustion chamber to reduce labor intensity and save gas consumption has become a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present utility model is to provide a gate valve to regulate the flow of gas and dynamically adjust the amount of gas entering the combustion chamber to reduce labor intensity and save gas consumption.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A plug-in valve comprises a valve body, a valve plate and an actuator. The valve body is provided with a first channel, the valve plate is provided with a second channel, and the actuator drives the valve plate to rise and fall so that the first channel and the second channel cooperate to form a fluid channel for fluid to pass through.

[0008] Optionally, in the above-mentioned gate valve, the shape of the second channel is at least one of a cone, a hyperbola, a polygon and an arc.

[0009] Optionally, in the above-mentioned gate valve, the second channel is conical in shape, and along the lifting direction of the valve plate, the width of the second channel at the bottom is greater than the width at the top.

[0010] Optionally, in the above-mentioned gate valve, the axis of the second channel coincides with the axis of the first channel.

[0011] Optionally, in the above-mentioned gate valve, the height of the second channel is greater than the diameter or height of the first channel.

[0012] Optionally, in the above-mentioned plug-in valve, the cross-sectional shape of the valve plate is rectangular, U-shaped, arc-shaped, circular, or elliptical.

[0013] Optionally, in the above-mentioned gate valve, a receiving groove for receiving the valve plate is provided at the bottom of the valve body.

[0014] Optionally, in the above-mentioned gate valve, the actuator is connected to the valve plate through a valve stem to drive the valve plate to rise and fall.

[0015] Optionally, in the above-mentioned gate valve, the actuator includes a handle or a power mechanism;

[0016] The power mechanism includes one of an electric device, a pneumatic device and a hydraulic device.

[0017] Optionally, in the above-mentioned gate valve, a sealing structure is provided between the valve stem and the valve body.

[0018] As can be seen from the above scheme, the gate valve disclosed by the present invention has an executive structure that drives the valve plate to rise and fall, so that the second channel and the first channel cooperate to form a fluid channel for the fluid to pass through, and the size of the flow area of ​​the fluid channel can be adjusted, thereby adjusting the flow rate of the fluid. The length of the valve plate opening is greater than the diameter or length of the medium channel of the valve body, so that the cross-sectional area of ​​the channel changes linearly within a certain range of movement of the valve plate, and the fluid always passes along the center of the channel, which reduces the fluid resistance and the possibility of vortex generation. Compared with the method of manually replacing the adjustment orifice plate in the prior art, it can reduce labor intensity and reduce the risk of gas leakage. At the same time, according to the different production stages and different working conditions of the coke oven, according to the maturity state of the coke in each carbonization chamber, the flow area of ​​the fluid channel can be adjusted, and the amount of gas entering the combustion chamber can be dynamically adjusted to save gas consumption, reduce energy consumption, and improve the quality of coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of the gate valve disclosed in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Middle AA section;

[0022] Figure 3The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 4 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 5 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0025] Figure 6 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 4 ;

[0026] Figure 7 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 5 ;

[0027] Figure 8 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 6 ;

[0028] Figure 9 The structure of the valve plate disclosed in the embodiment of the utility model is shown in FIG. Figure 7 ;

[0029] Figure 10 This is a flow regulation diagram of the gate valve disclosed in an embodiment of the present utility model.

[0030] Among them, 10, valve body, 11, first channel;

[0031] 20. Valve plate, 21. Second channel, 211. First contour line, 212. Second contour line, 213. Third contour line;

[0032] 30. Actuator, 31. Handle, 32. Power mechanism;

[0033] 40. Valve stem;

[0034] 50. Sealing structure. DETAILED DESCRIPTION

[0035] Explanation of relevant terms:

[0036] Coal pyrolysis: refers to the heating of coal in an airtight environment, causing it to undergo a series of physical changes and chemical reactions, ultimately generating products such as coal gas, tar and semi-coke.

[0037] Coking cycle: The time that coal stays in the carbonization chamber, that is, the time interval from the time of coal loading to the next coke pushing time. It is generally defined as the time interval from the time the flat coal rod enters the carbonization chamber to the time the coke pushing rod starts pushing the coke.

[0038] The pyrolysis of coal in a coke oven occurs over three temperature stages. In the first stage, coal pyrolysis produces semi-coke, tar, pyrolysis water, hydrocarbon gases, and carbon oxides. In the second stage, the tar undergoes secondary reactions to produce new gaseous hydrocarbons. Long-chain polymethylene groups produce olefins, alkyl aromatics produce methane and aromatics, and phenols crack to produce gaseous hydrocarbons and carbon monoxide. In the third stage, the products of the second stage continue to crack, producing compounds such as acetylene and naphthol, ultimately yielding condensed-ring aromatic hydrocarbons and carbon black. The semi-coke continues to shrink, releasing carbon monoxide and hydrogen at high temperatures, undergoing polymerization reactions to ultimately produce coke.

[0039] In the early stages of the coking cycle, when the coal charge is first introduced into the carbonization chamber and rapidly dried, the required heat transfer is at its highest, resulting in the highest required gas flow rate within the combustion chamber. As the coal dries, the required heat gradually decreases and stabilizes. Towards the end of the coking cycle, the required heat further decreases. Throughout the coking cycle, the required heat in the carbonization chamber continues to decrease. Therefore, the required gas flow rate varies dynamically, depending on the maturity of the coke in the carbonization chamber.

[0040] The core of the utility model is to disclose a plug valve, which can adjust the flow of gas and dynamically adjust the amount of gas entering the combustion chamber to reduce labor intensity and save gas consumption.

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figure 1 and Figure 2 As shown, the embodiment of the utility model discloses a gate valve, comprising a valve body 10, a valve plate 20 and an actuator 30. The valve body 10 is connected to a pipeline, wherein a first channel 11 is provided on the valve body 10.

[0043] The valve plate 20 is provided with a second channel 21 . The actuator 30 drives the valve plate 20 to move up and down, so that the first channel 11 and the second channel 21 cooperate to form a fluid channel for fluid to pass through.

[0044] It should be noted that the first channel 11 and the second channel 21 cooperate to achieve linear adjustment, equal percentage adjustment, or parabolic adjustment, which can be achieved by changing the shape of the second channel 21.

[0045] In the gate valve disclosed in the embodiment of the present utility model, the actuator 30 drives the valve plate 20 to rise and fall, so that the second channel 21 and the first channel 11 cooperate to form a fluid channel for the passage of fluid, and the size of the flow area of ​​the fluid channel can be adjusted, thereby linearly adjusting the flow rate of the fluid. Compared with the method of manually replacing the adjustment orifice plate in the prior art, it can reduce labor intensity and reduce the risk of gas leakage. At the same time, according to the different production stages and different working conditions of the coke oven and the maturity state of the coke in each carbonization chamber, the flow area of ​​the fluid channel can be adjusted, and the amount of gas entering the combustion chamber can be dynamically adjusted, thereby saving gas consumption, reducing energy consumption, and improving the quality of coke.

[0046] It should be noted that this article uses the application of the gate valve in a coke oven as an example, but it is not limited to application in coke ovens and can also be applied to other scenarios that require regulation of fluid flow.

[0047] Furthermore, for different coke oven working conditions (including normal production operation, intense production operation, oven stewing operation, extended coking time operation, etc.), the flow cross-sectional area of ​​the gate valve can be adjusted according to actual conditions. According to different furnace types and different fuels, the cross-sectional shape of the valve plate 20 includes conical ( Figure 3 As shown), arc ( Figure 4 As shown), hyperbolic ( Figure 5 and Figure 6 As shown), polygons ( Figure 7-Figure 9 The polygon can be a triangle or a trapezoid, as shown in Figure 7-Figure 9 shown.

[0048] In some specific embodiments, the second channel 21 can be formed by a plurality of spaced-apart through-holes disposed on the valve plate 20. The through-holes may have the same or different shapes and may be uniformly or unevenly sized. Preferably, the first channel 11 has a circular cross-section, and the second channels 21 are symmetrically arranged about the centerline of the valve plate 20.

[0049] like Figure 3 As shown, in some specific embodiments, the second channel 21 is tapered, and along the lifting direction of the valve plate 20, the width of the second channel 21 at the bottom is greater than the width at the top, that is, the second channel 21 is in an inverted V shape, narrow at the top and wide at the bottom. Figure 3 As shown, the second channel 21 is enclosed by a first contour line 211, a second contour line 212, and a third contour line 213. The first contour line 211 and the second contour line 212 are both straight lines, and their first ends intersect. The third contour line 213 is an arc. Preferably, the radius of the circle in which the third contour line 213 lies is equal to the radius of the first channel 11. The second ends of the first contour line 211 and the second contour line 212 are respectively connected to the two ends of the third contour line 213.

[0050] In other specific embodiments, the third contour line 213 may be a straight line, and the second channel 21 may pass through the bottom of the valve plate 20 .

[0051] As the actuator 30 drives the valve plate 20 downward, the cross-sectional area of ​​the fluid passage formed by the first and second passages 11 and 21 gradually decreases, causing the gas flow rate to gradually decrease. This decreases until the valve plate 20 descends to the bottom of the valve body 10, at which point the cross-sectional area of ​​the fluid passage remains constant. As the actuator 30 drives the valve plate 20 upward, the cross-sectional area of ​​the fluid passage formed by the first and second passages 11 and 21 gradually increases, causing the gas flow rate to gradually increase.

[0052] Figure 10 The graph shows the gas flow adjustment amount and the moving distance of the valve plate 20 during the rising process of the valve plate 20. The horizontal axis represents the moving distance of the valve plate 20. A distance of 0 indicates that the upper end point of the second channel 21 abuts the top of the first channel 11. Figure 3 As shown, H shown in the figure is 0 at this time. The gradually increasing distance means that during the rising process of the valve plate 20, the distance between the upper end point of the second channel 21 and the top of the first channel 11 gradually increases, that is, H shown in the figure. At this time, the gas flow regulation amount tends to increase. It can be seen from the figure that within a certain movement range of the valve plate 20, the cross-sectional area of ​​the fluid channel changes approximately linearly, so the gas flow regulation amount changes approximately linearly. The linear change can achieve precise control of the gas flow rate.

[0053] Furthermore, in order to ensure that the fluid always passes through the center of the valve body 10, the axis of the second channel 21 coincides with the axis of the first channel 11, that is, the intersection of the first contour line 211 and the second contour line 212 is located on the axis of the first channel 11. The height of the second channel 21 is greater than the diameter or height of the first channel 11. Here, the height of the second channel 21 refers to the length of the second channel 21 along the lifting direction of the valve plate 20. The mark H in the figure is the height of the second channel 21 above the diameter of the first channel 11. Within a certain range of movement of the valve plate 20, the channel cross-sectional area changes linearly, and the fluid always passes along the center of the first channel 11 and the second channel 21, which reduces fluid resistance and reduces the possibility of vortex generation. When it is necessary to further reduce the flow rate, the valve plate 20 can be lowered to further reduce the flow area of ​​the fluid channel.

[0054] Furthermore, the cross-sectional shape of the valve plate 20 includes but is not limited to rectangular, U-shaped, arc-shaped, circular and elliptical. The bottom of the valve body 10 is provided with a receiving groove for receiving the valve plate 20, providing a receiving space for the valve plate 20 during the descending process.

[0055] Furthermore, in the gate valve disclosed in the embodiment of the present utility model, the actuator 30 is connected to the valve plate 20 through the valve stem 40 to drive the valve plate 20 to rise and fall.

[0056] The actuator 30 includes a handle 31 or a power mechanism 32. The handle 31 is connected to a first end of a valve stem 40. The second end of the valve stem 40 is connected to the valve plate 20. Rotating the handle 31 drives the valve stem 40 up and down, thereby driving the valve plate 20 up and down. The power mechanism 32 is in transmission connection with the handle 31.

[0057] In some specific embodiments, the handle 31 and the valve stem 40 are coupled via a rack and pinion. The first end of the valve stem 40 is connected to the rack and the second end is connected to the valve plate 20. The handle 31 is connected to the gear, and the gear and rack mesh. Rotation of the handle 31 drives the valve stem 40 up and down, thereby driving the valve plate 20 up and down. The second end of the valve stem 40 and the valve plate 20 can be connected by a bolt, a pin, or a connector. The specific connection method is not specifically limited.

[0058] In other specific embodiments, the handle 31 is fixedly connected to the valve stem 40 , the valve stem 40 is provided with threads, the valve plate 20 and the valve stem 40 are threadedly matched, and the valve plate 20 is driven to rise and fall by rotating the handle 31 .

[0059] Furthermore, the power mechanism 32 can be an electric device, a pneumatic device, or a hydraulic device. The configuration of the power mechanism 32 can achieve mechanization, eliminating the need for manual operation and further reducing labor intensity. Of course, the handle 31 can also be rotated manually to drive the valve plate 20 to rise and fall.

[0060] Furthermore, in order to ensure the sealing performance of the valve, a sealing structure 50 is provided between the valve stem 40 and the valve body 10 .

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0062] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0063] The directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the embodiments of the present invention.

[0064] The terms "connected" and "connection" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on their specific circumstances.

[0065] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A gate valve, characterized in that: The invention comprises a valve body (10), a valve plate (20) and an actuator (30), wherein the valve body (10) is provided with a first channel (11), the valve plate (20) is provided with a second channel (21), and the actuator (30) drives the valve plate (20) to rise and fall, so that the first channel (11) and the second channel (21) cooperate to form a fluid channel for fluid to pass through.

2. The gate valve according to claim 1, wherein: The shape of the second channel (21) includes at least one of a cone, a hyperbola, a polygon and an arc.

3. The gate valve according to claim 2, wherein: The second channel (21) is conical in shape, and along the lifting direction of the valve plate (20), the width of the second channel (21) at the bottom is greater than the width at the top.

4. The gate valve according to claim 3, wherein: The axis of the second channel (21) coincides with the axis of the first channel (11).

5. The gate valve according to claim 4, wherein: The height of the second channel (21) is greater than the diameter or height of the first channel (11).

6. The gate valve according to claim 1, wherein: The cross-sectional shape of the valve plate (20) is rectangular, U-shaped, arc-shaped, circular, or elliptical.

7. The gate valve according to claim 6, wherein: The bottom of the valve body (10) is provided with a receiving groove for receiving the valve plate (20).

8. The gate valve according to any one of claims 1 to 7, characterized in that: The actuator (30) is connected to the valve plate (20) via a valve stem (40) to drive the valve plate (20) to rise and fall.

9. The gate valve according to claim 8, wherein: The actuator (30) includes a handle (31) or a power mechanism (32); The power mechanism (32) includes one of an electric device, a pneumatic device and a hydraulic device.

10. The gate valve according to claim 9, wherein: A sealing structure (50) is provided between the valve stem (40) and the valve body (10).

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