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 invention, 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 present invention relates to the technical field of valves, and more specifically, to a gate 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 working principle of the heating system during coke oven production is as follows: the gas is distributed to the gas branch pipe of each combustion chamber through the gas main pipe, and each branch pipe is installed with an adjusting cock, an orifice box and an exchange cock. The adjusting orifice is installed in the orifice box, and the gas flow is controlled by the orifice. The aperture of the adjusting orifice is different when the production status of the coke oven is different (normal production, extended coking, and normal heating after the oven is finished), but the aperture of the adjusting orifice is fixed when the production status is the same. Therefore, when changing the production status of the coke oven, it is necessary to manually open the orifice box and replace the adjusting orifice inside. This method is labor-intensive and has the risk of gas leakage. It is impossible to adjust the gas volume of a certain combustion chamber according to the actual situation of coke 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 technical personnel in this field. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a gate valve to adjust 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 object, the present invention provides the following technical solutions:

[0007] A plug 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 gate 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] It can be seen from the above scheme that the gate valve disclosed in the present invention has an execution 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 opening length of the valve plate is greater than the diameter or length of the medium channel of the valve body, so that the valve plate has a linear change in the cross-sectional area of ​​the channel within a certain range of movement, and the fluid always passes along the center of the channel, which reduces the fluid resistance and reduces 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0020] Figure 1 It is a structural schematic diagram of a gate valve disclosed in an embodiment of the present invention;

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

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

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

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

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

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

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

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

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

[0030] Wherein, 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 air-tight 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 time of coke pushing. It is generally defined as the time interval from the coal leveling rod entering the carbonization chamber to the time when the coke pushing rod starts to push coke.

[0038] The pyrolysis of coal in the coke oven is mainly divided into three temperature stages. The first stage is the pyrolysis of coal to produce semi-coke, tar, pyrolysis water, hydrocarbon gas and carbon oxides. In the second stage, the tar undergoes a secondary reaction to produce new gaseous hydrocarbons. Long-chain polymethylene groups produce olefins, alkyl aromatics produce methane and aromatics, and phenols are cracked to produce gaseous hydrocarbons and carbon monoxide. In the third stage, the products of the second stage reaction continue to crack to produce compounds such as acetylene and naphthol, and finally to produce polycyclic aromatic hydrocarbons and carbon black. The semi-coke continues to shrink, releasing carbon monoxide and hydrogen at high temperature, undergoing a polymerization reaction, and finally producing coke.

[0039] In the early stage of the entire coking cycle, the coal charge is just loaded into the carbonization chamber and the coal is dried quickly. At this time, the required heat transfer is the largest, so the required gas flow in the combustion chamber is the largest. As the coal is dried, the required heat gradually decreases and gradually stabilizes. At the end of coking, the required heat is further reduced. Throughout the coking cycle, the heat required in the carbonization chamber continues to decrease. Therefore, according to the maturity of the coke in the carbonization chamber, the required gas flow changes dynamically.

[0040] The core of the present invention is to disclose a gate valve, which can adjust the flow of gas and dynamically adjust the amount of gas entering the combustion chamber, so as 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0042] like Figure 1 and Figure 2 As shown, the embodiment of the present invention discloses a gate valve, comprising a valve body 10, a valve plate 20 and an actuator 30, wherein 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 , 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 the 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 invention, the execution structure 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 fluid to pass through, 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, 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, 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 the application in the coke oven, and can also be applied to other scenarios that require regulating the fluid flow.

[0047] Furthermore, for different working conditions of the coke oven (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 the actual situation. According to different furnace types and different fuels, the cross-sectional shape of the valve plate 20 includes a conical ( Figure 3 As shown), arc ( Figure 4 shown), hyperbolic type ( Figure 5 and Figure 6 shown), polygons ( Figure 7-Figure 9 The polygon may 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 through holes arranged at intervals on the valve plate 20, the shapes of the through holes are the same or different, and the sizes of the through holes can be uniformly arranged or unevenly arranged. Preferably, the cross-sectional shape of the first channel 11 is circular, and the second channel 21 is symmetrically arranged about the center line of the valve plate 20.

[0049] like Figure 3 As shown, in some specific embodiments, 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, 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 the first ends of the two intersect. The third contour line 213 is an arc. Preferably, the radius of the circle where the third contour line 213 is located 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 connected to the two ends of the third contour line 213 respectively.

[0050] In some 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] When the actuator 30 drives the valve plate 20 to descend, the cross-sectional area of ​​the fluid channel formed by the first channel 11 and the second channel 21 gradually decreases, causing the gas flow rate to gradually decrease until the valve plate 20 descends to the bottom of the valve body 10, at which time the cross-sectional area of ​​the fluid channel remains unchanged. When the actuator 30 drives the valve plate 20 to ascend, the cross-sectional area of ​​the fluid channel formed by the first channel 11 and the second channel 21 gradually increases, causing the gas flow rate to gradually increase.

[0052] Fig.10 FIG. 2 is a graph showing 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 against the top of the first channel 11. Figure 3 As shown, H shown in the figure is 0 at this time, and 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 flow regulation amount of the gas shows an increasing trend. It can be seen from the figure that within a certain moving range of the valve plate 20, the cross-sectional area of ​​the fluid channel changes approximately linearly, so that the gas flow regulation amount changes approximately linearly, and the linear change can realize precise control of the gas flow.

[0053] Furthermore, in order to make the fluid always pass 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 the 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 further 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 a rectangular, U-shaped, arc-shaped, circular and elliptical shape. A receiving groove for receiving the valve plate 20 is provided at the bottom of the valve body 10 to provide a receiving space for the valve plate 20 to descend.

[0055] Furthermore, in the gate valve disclosed in the embodiment of the present invention, 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. A second end of the valve stem 40 is connected to a valve plate 20. The handle 31 rotates to drive the valve stem 40 to rise and fall, thereby driving the valve plate 20 to rise and fall. 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 cooperate through a gear rack, 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 21 is connected to the gear, the gear and the rack are meshed, and the valve stem 40 is driven to rise and fall by the rotation of the handle 31, thereby driving the valve plate 20 to rise and fall. The second end of the valve stem 40 and the valve plate 20 can be connected by bolts, can also be connected by a pin shaft, or can be connected by a connecting piece, and 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 the rotation of the handle 31 .

[0059] Furthermore, the power mechanism 32 can be an electric device, a pneumatic device, or a hydraulic device. The setting of the power mechanism 32 can be mechanized, without manual operation, and can further reduce 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 or 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 are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined 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, and therefore should not be understood as limiting the embodiments of the present invention.

[0064] The terms "connected" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0065] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these 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 valve body (10) 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, characterized in that: 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, characterized in that: 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, characterized in that: The axis of the second channel (21) coincides with the axis of the first channel (11).

5. The gate valve according to claim 4, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The actuator (30) comprises a handle (31) or a power mechanism (32); The power mechanism (32) comprises one of an electric device, a pneumatic device and a hydraulic device.

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

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