High-temperature gate valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a high-temperature gate valve which comprises a lower valve box, an upper valve box, a plurality of valve plates and a plurality of lifting mechanisms. When the gate valve is closed, the multiple valve plates are sequentially arranged in a staggered mode from top to bottom in the fluid movement direction and used for forming a partition between the inlet and the outlet. By adopting a plurality of valve plates with smaller volume and lighter weight, the overall weight of the valve plates is obviously reduced, the burden of a lifting mechanism is reduced, the driving is more flexible, the opening and closing operation of the gate valve is more stable, the problems of clamping stagnation, abrasion and the like are reduced, the replacement process of the valve plates is simplified, the maintenance and replacement complexity is reduced, and the cost is reduced. The operation and maintenance cost of equipment is reduced, the deformation amplitude of thermal expansion and cold contraction is reduced, the phenomena of cracks and falling caused by thermal expansion are reduced, the service life of the valve plate is prolonged, and the risk of structural damage caused by a high-temperature environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a high-temperature gate valve. Background Technology

[0002] High-temperature gate valves, as one of the important valves in the field of industrial control, have long been widely used in industries such as mining, cement, and metallurgy, especially playing a key role in the treatment of high-temperature gases or waste gases. Their main function is to control the flow rate and direction of the medium, thereby performing functions such as isolation, sealing, and regulation in high-temperature environments. However, with the continuous advancement of industrialization and the increasing demands of related industries, higher requirements are being placed on the performance and durability of high-temperature gate valves.

[0003] Traditional high-temperature gate valves typically employ a single valve plate structure, which results in a heavy and bulky valve plate that is susceptible to the effects of high-temperature environments. In particular, at temperatures around 1000℃, the valve plate is prone to cracking and falling off due to thermal expansion and contraction.

[0004] Furthermore, the single valve plate design means that once the valve plate is damaged or worn, the entire valve plate needs to be replaced and repaired. This increases maintenance costs, extends production line downtime, and reduces production efficiency. More seriously, the normal service life of the valve plate is usually only between 6 and 10 months. The frequent replacement cycle and complicated replacement process further increase operating costs. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature gate valve that solves the technical problems of short valve plate service life, high maintenance cost and troublesome replacement in existing high-temperature gate valves.

[0006] This utility model discloses a high-temperature gate valve, comprising:

[0007] The lower valve box has a lower valve cavity inside, and has an inlet and an outlet arranged opposite to each other on the front and rear sides, and the inlet and the outlet are both connected to the lower valve cavity;

[0008] The upper valve box is located on top of the lower valve box and has an upper valve chamber inside;

[0009] Multiple valve plates are arranged vertically and fit together, and are located inside the lower valve cavity;

[0010] Multiple lifting mechanisms are provided, each corresponding to one of the valve plates, and are installed on the top of the upper valve box. The driving end passes through the upper valve cavity from top to bottom and extends into the lower valve cavity to be connected to the valve plate in a transmission manner.

[0011] When the gate valve is closed, multiple valve plates are staggered from top to bottom along the direction of fluid movement to form a barrier between the inlet and the outlet.

[0012] This application significantly reduces the overall weight of the valve plate by employing multiple smaller and lighter valve plates, thus reducing the burden on the lifting mechanism, making the drive more flexible, the gate valve opening and closing operation smoother, and reducing problems such as jamming and wear. At the same time, this design simplifies the valve plate replacement process; only the most severely worn lower valve plate needs to be replaced, reducing the complexity of maintenance and replacement, and lowering equipment operation and maintenance costs. Furthermore, the smaller valve plate volume also reduces the deformation range due to thermal expansion and contraction, reducing cracks and detachment caused by thermal expansion, extending the valve plate's service life, and reducing the risk of structural damage from high-temperature environments.

[0013] Based on the above technical solution, the solution of this application can be further improved as follows:

[0014] Preferably, vertical slots corresponding to the valve plate are provided on the left and right sides of the lower valve chamber; this solution ensures that the valve plate moves smoothly along a predetermined trajectory, prevents deviation or jamming, and provides additional support when closed to maintain its stability and positional accuracy.

[0015] Preferably, the valve plate is provided in two pieces; by adopting this solution, the number of lifting mechanisms is reduced, and the manufacturing cost is lowered.

[0016] Preferably, the lifting mechanism includes:

[0017] The counterweight box is vertically slidably installed on the outside of the upper valve box;

[0018] Multiple lifting units are arranged at lateral intervals, each lifting unit comprising:

[0019] The drive wheel is rotatably mounted on the top of the upper valve box and positioned directly above the valve plate.

[0020] The guide wheel is rotatably mounted on the top of the upper valve box and positioned directly above the counterweight box.

[0021] The boom is arranged vertically, and its bottom end is connected to the top end of the valve plate.

[0022] The sling has one end connected to the top of the boom and the other end connected to the counterweight box, and is wound around the drive wheel and the guide wheel;

[0023] A synchronous drive mechanism is installed on the top of the upper valve box and is connected to multiple drive wheels for transmission. This solution enables smooth and precise control of the valve plate, which not only improves the operating efficiency of the gate valve but also ensures the stability and reliability of the valve plate.

[0024] Preferably, the lifting mechanism includes:

[0025] Multiple slide rails are arranged vertically and installed laterally at intervals on the outside of the upper valve box;

[0026] Multiple sliders are installed on the counterweight box and are slidably connected to the slide rails one by one. This solution significantly improves the stability and wear resistance of the lifting mechanism, reduces maintenance costs, and enables the lifting mechanism to maintain efficient and stable performance during long-term use.

[0027] Preferably, it further includes:

[0028] Multiple support frames, each corresponding to a lifting unit, are located on the top of the upper valve box and extend to the front and rear sides of the upper valve box to support and fix the drive wheel and the guide wheel. This design improves the stability of the support and strengthens the structure of the upper valve box, making the entire lifting mechanism more stable and reliable.

[0029] Preferably, the outer side of the lower valve box is provided with multiple first inspection ports communicating with the lower valve cavity, and the first inspection ports are detachably covered with first door covers; the outer side of the upper valve box is provided with multiple second inspection ports communicating with the upper valve cavity, and the second inspection ports are detachably covered with second door covers; this solution facilitates maintenance personnel to enter the valve box for inspection and maintenance, improves work efficiency and maintenance quality, and ensures that no medium leakage or safety accidents occur during equipment operation.

[0030] Preferably, it further includes:

[0031] Two reinforcing ribs, arranged in a grid pattern, are respectively located on the front and rear sides of the lower valve box;

[0032] Multiple reinforcing plates are spaced apart on the left and right sides of the lower valve box; this design makes the structure of the lower valve box more robust and stable, improves the load-bearing capacity of the valve box, and enhances its stability and durability.

[0033] Preferably, it further includes:

[0034] Two mating flanges are installed on the outside of the inlet and the outlet, respectively; this solution enhances connection reliability and sealing, and improves the convenience of installation and maintenance.

[0035] Preferably, the bottom surface of the lowest valve plate is semi-circular and can fit against the bottom surface of the lower valve cavity. This design increases the contact area, allowing the valve plate to be more stably supported in the lower valve cavity, thereby enhancing the stability of the entire valve and reducing the possibility of media leakage.

[0036] Through the above technical solution, this utility model achieves the following beneficial effects:

[0037] 1. By adopting multiple valve plates that are smaller in size and lighter in weight, this application significantly reduces the overall weight of the valve plate, reduces the burden on the lifting mechanism, makes the drive more flexible, makes the gate valve opening and closing operation more stable, and reduces problems such as jamming and wear.

[0038] 2. This application simplifies the valve plate replacement process, requiring only the replacement of the severely worn bottom valve plate, reducing the complexity of maintenance and replacement, and decreasing equipment operation and maintenance costs;

[0039] 3. The valve plate in this application has a small volume, which reduces the deformation range of thermal expansion and contraction, reduces the cracks and detachment caused by thermal expansion, extends the service life of the valve plate, and reduces the risk of structural damage caused by high temperature environment. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the high-temperature gate valve located at the front side in a specific embodiment of this utility model;

[0042] Figure 2 This is a schematic diagram of the high-temperature gate valve located at the rear side in a specific embodiment of this utility model;

[0043] Figure 3 This is a side cross-sectional view of the high-temperature gate valve according to a specific embodiment of the present invention;

[0044] Figure 4 This is a front sectional view of the high-temperature gate valve according to a specific embodiment of the present utility model;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Lower valve box; 2. Upper valve box; 3. Valve plate; 4. Lifting mechanism; 5. Support cross frame; 6. Reinforcing rib; 7. Reinforcing plate; 8. Connecting flange;

[0047] 11. Lower valve chamber; 12. Inlet; 13. Outlet; 14. First inspection port; 15. First door cover; 21. Upper valve chamber; 22. Second inspection port; 23. Second door cover; 41. Counterweight box; 42. Lifting unit; 43. Slide rail; 44. Slider;

[0048] 111. Vertical slot; 421. Drive wheel; 422. Guide wheel; 423. Lifting rod; 424. Lifting cable. Detailed Implementation

[0049] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0050] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of the components in the high-temperature gate valve. They are only used to facilitate the description of this utility model and simplify the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0054] Example:

[0055] like Figures 1-4 As shown in the figure, this application discloses a high-temperature gate valve for controlling the flow rate and direction of the medium, and for performing functions such as isolation, sealing and regulation in high-temperature environments. Its specific structure includes: a lower valve box 1, an upper valve box 2, multiple valve plates 3 and multiple lifting mechanisms 4.

[0056] The lower valve box 1 has a lower valve chamber 11 inside, which is used to accommodate the valve plate 3. It has an inlet 12 and an outlet 13 arranged opposite to each other on the front and rear sides, and both the inlet 12 and the outlet 13 are connected to the lower valve chamber 11 to ensure that the medium can enter and exit smoothly.

[0057] The upper valve box 2 is located on top of the lower valve box 1 and has an upper valve chamber 21 inside. It not only serves to seal and protect the internal mechanism, but also provides space for the installation of the lifting mechanism 4.

[0058] Multiple valve plates 3 are arranged vertically and fit together, and are located in the lower valve chamber 11 to control the flow and cut off of the medium.

[0059] Multiple lifting mechanisms 4 correspond one-to-one with valve plates 3 and are installed on the top of the upper valve box 2. The driving end passes through the upper valve cavity 21 from top to bottom and extends into the lower valve cavity 11 to drive the valve plate 3. Its main function is to drive the valve plate 3 to move up and down, thereby controlling the opening and closing of the gate valve.

[0060] When the gate valve is closed, multiple valve plates 3 are staggered from top to bottom along the direction of fluid movement to form a barrier between the inlet 12 and the outlet 13, thereby preventing the flow of the medium.

[0061] The above technical solution works as follows:

[0062] When it is necessary to fully open, the valve plate 3 is lifted by the lifting mechanism 4, so that all the valve plates 3 rise to the top of the lower valve chamber 11, thereby no longer forming a barrier between the inlet 12 and the outlet 13.

[0063] When flow rate needs to be adjusted, only the lowest valve plate 3 is driven to rise and fall, thereby adjusting the size of the opening and thus achieving the function of flow rate regulation.

[0064] This application uses multiple smaller and lighter valve plates 3, which significantly reduces the weight of the valve plate 3 compared to the traditional single valve plate 3. This reduces the burden on the lifting mechanism 4, making the valve plate 3 drive more flexible and the gate valve opening and closing operation more stable. It can effectively reduce problems such as valve jamming and wear caused by excessive weight of the valve plate 3.

[0065] This application makes the replacement of valve plate 3 simpler and more efficient; in high-temperature environments, usually only the bottom of the lowest valve plate 3 is worn, while the other valve plates 3 are almost unaffected; therefore, in actual operation, only the valve plate 3 with more severe wear needs to be replaced; this greatly reduces the complexity of maintenance and replacement, thereby reducing the operating and maintenance costs of the equipment.

[0066] This application makes each valve plate 3 smaller in volume, which significantly reduces the deformation range due to thermal expansion and contraction, thereby greatly reducing cracks and detachment caused by thermal expansion, significantly extending the service life of the valve plate 3, and reducing the risk of structural damage caused by high temperature environment.

[0067] In some embodiments, such as Figure 3 and Figure 4 As shown, vertical slots 111 corresponding to valve plates 3 are provided on the left and right sides of the lower valve chamber 11.

[0068] The above settings ensure that the valve plate 3 moves smoothly along the predetermined trajectory, preventing the valve plate 3 from deviating from its normal position or getting stuck. They also provide additional support for the valve plate 3 when the gate valve is closed, which helps to maintain the stability and positional accuracy of the valve plate 3.

[0069] In some embodiments, the valve plate 3 is provided as two pieces; this reduces the number of lifting mechanisms 4 and lowers manufacturing costs, but it is not limited to this and can also be three or more pieces, without specific limitation.

[0070] Based on the above embodiments, such as Figure 3 As shown, the lifting mechanism 4 includes: a counterweight box 41, multiple lifting units 42, and a synchronous drive mechanism (not shown in the figure), which is configured as follows:

[0071] The counterweight box 41 is vertically slidably installed on the outside of the upper valve box 2 to balance the weight of the valve plate 3, so that the lifting mechanism 4 can operate more effortlessly and stably, thereby achieving precise control over the lifting and lowering process of the valve plate 3.

[0072] Multiple lifting units 42 are arranged laterally at intervals to ensure that the valve plate 3 is subjected to uniform force and to avoid swaying and tilting during lifting. Each lifting unit 42 includes:

[0073] The drive wheel 421 is rotatably mounted on the top of the upper valve box 2 and positioned directly above the valve plate 3, used to drive the lifting cable 424 to move.

[0074] The guide wheel 422 is rotatably mounted on the top of the upper valve box 2 and positioned directly above the counterweight box 41 to guide the movement of the sling 424 and ensure its smooth movement.

[0075] The lifting rod 423 is arranged vertically, and its bottom end is connected to the top end of the valve plate 3. It is used to connect the valve plate 3 and the lifting cable 424, which improves the lifting stability.

[0076] One end of the sling 424 is connected to the top of the boom 423, and the other end is connected to the counterweight box 41, and is wound around the drive wheel 421 and the guide wheel 422;

[0077] The synchronous drive mechanism is installed on the top of the upper valve box 2 and is connected to multiple drive wheels 421 for driving the synchronous rotation of multiple drive wheels 421, thereby ensuring that all lifting units 42 can work at the same time and realize the smooth lifting or lowering of the valve plate 3.

[0078] Specifically, the upper and lower ends of the boom 423 are hinged to reduce deviations caused by assembly errors and improve the stability of lifting.

[0079] For example, if the space between the lifting units 42 is large, the synchronous drive mechanism includes: an electric actuator, a gearbox, multiple drive shafts and multiple couplings; wherein, the electric actuator and the gearbox are installed at the top center of the upper valve box 2, and the electric actuator is connected to the input end of the gearbox, while the output ends of the gearbox on both sides are connected in series with the drive wheels 421 on both sides through drive shafts and couplings respectively.

[0080] For example, if the space between the lifting units 42 is small, the synchronous drive mechanism includes: a geared motor, multiple drive shafts and multiple couplings; wherein, multiple drive wheels 421 are connected in series through drive shafts and couplings, and the geared motor is located on one side of the top of the upper valve box 2 and connected to a drive wheel 421 on the side.

[0081] The working principle of the above technical solution is as follows:

[0082] When the synchronous drive mechanism is activated, it drives all the drive wheels 421 to rotate synchronously. The rotation of the drive wheels 421 causes the sling 424 to move, which in turn raises or lowers the valve plate 3 via the boom 423. Simultaneously, the counterweight box 41 moves freely vertically under the traction of the sling 424 to balance the weight of the valve plate 3. By adjusting the weight within the counterweight box 41 and the rotational speed of the synchronous drive mechanism, precise control of the raising and lowering process of the valve plate 3 can be achieved.

[0083] The lifting mechanism 4 achieves smooth and precise control of the valve plate 3 through the coordinated work of the counterweight box 41, the lifting unit 42 and the synchronous drive mechanism. It not only improves the operating efficiency of the gate valve, but also ensures the stability and reliability of the valve plate 3.

[0084] In this embodiment, as Figures 1-3 As shown, the lifting mechanism 4 includes: multiple slide rails 43 and multiple sliders 44, which are configured as follows:

[0085] Multiple slide rails 43 are arranged vertically and installed laterally at intervals on the outside of the upper valve box 2 to provide stable guidance and support for the counterweight box 41, ensuring that it can move smoothly and accurately in the vertical direction.

[0086] Multiple sliders 44 are mounted on the counterweight box 41 and are slidably connected to the slide rail 43 one by one. This reduces the friction between the counterweight box 41 and the slide rail 43, allowing the counterweight box 41 to move more easily along the slide rail 43.

[0087] By adding slide rail 43 and slider 44, the lifting mechanism 4 has been significantly improved in terms of stability and wear resistance, while reducing maintenance costs, enabling the lifting mechanism 4 to maintain efficient and stable performance during long-term use.

[0088] In this embodiment, as Figure 1 and Figure 2 As shown, it also includes: multiple supporting cross frames 5, which correspond one-to-one with the lifting unit 42 and are located on the top of the upper valve box 2, extending to the front and rear sides of the upper valve box 2, for supporting and fixing the drive wheel 421 and guide wheel 422, ensuring that they are stably and accurately installed on the top of the upper valve box 2; at the same time, it also plays a role in strengthening the structural strength of the upper valve box 2, making the entire lifting mechanism 4 more stable and reliable.

[0089] In some embodiments, such as Figures 1-4 As shown, the outer side of the lower valve box 1 is provided with a plurality of first inspection ports 14 that communicate with the lower valve chamber 11, and the first inspection ports 14 are provided with a first door cover 15 that can be detached from the outside; the outer side of the upper valve box 2 is provided with a plurality of second inspection ports 22 that communicate with the upper valve chamber 21, and the second inspection ports 22 are provided with a second door cover 23 that can be detached from the outside.

[0090] Specifically, the cover is used to seal the access port to prevent media leakage and dust entry. The cover is usually made of the same or similar material as the valve box to ensure its corrosion resistance and high temperature resistance. The cover and the access port are usually fixed by bolts, flanges or quick-release connections to facilitate quick opening and closing.

[0091] The above-mentioned setup allows maintenance personnel to easily enter the valve box for inspection and maintenance, improving work efficiency and maintenance quality. Furthermore, the removable cover ensures that no media leakage or safety accidents will occur during equipment operation.

[0092] In some embodiments, such as Figure 1 and Figure 2 As shown, it also includes: two reinforcing ribs 6 and multiple reinforcing plates 7, which are configured as follows:

[0093] The two reinforcing ribs 6 are arranged in a grid shape and are respectively located on the front and rear sides of the lower valve box 1. They can enhance the structural strength of the lower valve box 1 and prevent it from deforming or cracking under high pressure, high temperature or complex working conditions. The grid-shaped design allows the reinforcing ribs 6 to effectively distribute the pressure and stress inside the lower valve box 1 to a larger area, thereby improving the overall load-bearing capacity of the lower valve box 1.

[0094] Multiple reinforcing plates 7 are spaced apart on the left and right sides of the lower valve box 1. They are preferably arranged horizontally and are also spaced vertically to significantly improve the resistance of the lower valve box 1 to lateral forces and prevent it from deforming when subjected to lateral impact or pressure.

[0095] The above-mentioned design makes the structure of the lower valve box 1 more robust and stable, which not only improves the load-bearing capacity of the valve box, but also enhances its stability and durability, providing a strong guarantee for the long-term stable operation of the high-temperature gate valve.

[0096] In some embodiments, such as Figure 1 and Figure 2 As shown, it also includes two mating flanges 8, which are installed on the outside of the inlet 12 and the outlet 13 respectively, for connecting the lower valve box 1 to the flange on the pipeline or equipment by bolts or other fasteners, thereby forming a complete and closed fluid passage.

[0097] By designing the docking flange 8, the connection reliability and sealing performance of the high-temperature gate valve are enhanced, and its installation and maintenance convenience is improved, thus enabling it to better adapt to various complex working conditions and ensuring the safe and stable operation of fluid transportation.

[0098] In some embodiments, the bottom surface of the lowest valve plate 3 is semi-circular and can fit against the bottom surface of the lower valve chamber 11, which increases the contact area and allows the valve plate 3 to be more stably supported in the lower valve chamber 11, thereby enhancing the stability of the entire valve and reducing the possibility of media leakage.

[0099] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A high-temperature gate valve, characterized in that, include: The lower valve box has a lower valve cavity inside, and has an inlet and an outlet arranged opposite to each other on the front and rear sides, and the inlet and the outlet are both connected to the lower valve cavity; The upper valve box is located on top of the lower valve box and has an upper valve chamber inside; Multiple valve plates are arranged vertically and fit together, and are located inside the lower valve cavity; Multiple lifting mechanisms are provided, each corresponding to one of the valve plates, and are installed on the top of the upper valve box. The driving end passes through the upper valve cavity from top to bottom and extends into the lower valve cavity to be connected to the valve plate in a transmission manner. When the gate valve is closed, multiple valve plates are staggered from top to bottom along the direction of fluid movement to form a barrier between the inlet and the outlet.

2. The high-temperature gate valve according to claim 1, characterized in that, The lower valve chamber has vertical slots on its left and right sides that correspond one-to-one with the valve plate.

3. The high-temperature gate valve according to claim 1, characterized in that, The valve plate is configured as two pieces.

4. The high-temperature gate valve according to claim 3, characterized in that, The lifting mechanism includes: The counterweight box is vertically slidably installed on the outside of the upper valve box; Multiple lifting units are arranged at lateral intervals, each lifting unit comprising: The drive wheel is rotatably mounted on the top of the upper valve box and positioned directly above the valve plate. The guide wheel is rotatably mounted on the top of the upper valve box and positioned directly above the counterweight box. The boom is arranged vertically, and its bottom end is connected to the top end of the valve plate. The sling has one end connected to the top of the boom and the other end connected to the counterweight box, and is wound around the drive wheel and the guide wheel; A synchronous drive mechanism is installed on the top of the upper valve box and is connected to the multiple drive wheels via a transmission.

5. The high-temperature gate valve according to claim 4, characterized in that, The lifting mechanism includes: Multiple slide rails are arranged vertically and installed laterally at intervals on the outside of the upper valve box; Multiple sliders are installed on the counterweight box and are slidably connected to the slide rails one by one.

6. The high-temperature gate valve according to claim 4, characterized in that, Also includes: Multiple support frames, each corresponding to a lifting unit, are located on the top of the upper valve box and extend to the front and rear sides of the upper valve box to support and fix the drive wheel and the guide wheel.

7. The high-temperature gate valve according to claim 1, characterized in that, The outer side of the lower valve box is provided with multiple first inspection ports that communicate with the lower valve cavity, and the first inspection ports are detachably covered with first door covers; the outer side of the upper valve box is provided with multiple second inspection ports that communicate with the upper valve cavity, and the second inspection ports are detachably covered with second door covers.

8. The high-temperature gate valve according to claim 1, characterized in that, Also includes: Two reinforcing ribs, arranged in a grid pattern, are respectively located on the front and rear sides of the lower valve box; Multiple reinforcing plates are spaced apart on the left and right sides of the lower valve box.

9. The high-temperature gate valve according to claim 1, characterized in that, Also includes: Two mating flanges are installed on the outside of the inlet and the outlet, respectively.

10. The high-temperature gate valve according to claim 1, characterized in that, The bottom surface of the lowest valve plate is semi-circular and can fit against the bottom surface of the lower valve cavity.

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