Protection system for vertical gate valve of hot blast stove

Abstract

The protection system comprises a transmission frame and a traction piece, a counterweight piece and a valve plate apply traction force to the traction piece in the same direction, so that when the valve plate loses traction, the traction piece can prevent the valve plate from falling off, and when a transmission chain is broken, the traction piece can prevent the valve plate from falling off. The traction piece is connected between the valve plate and the balance weight piece, the balance weight piece and the valve plate are kept balanced through traction force, the valve plate is prevented from directly falling into a valve groove, the device can play a role immediately at the moment when a transmission chain is broken, reliability and safety are improved, production interruption caused by wedging or damage of the valve plate is avoided, normal production and operation of the hot blast stove are guaranteed, and the service life of the hot blast stove is prolonged. And the downtime caused by equipment failure is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace production equipment, and in particular to a protection system for a vertical gate valve of a hot blast furnace. Background Art

[0002] During blast furnace operations, the hot blast furnace area is equipped with multiple vertical gate valves, including several large-diameter vertical gate valves driven by transmission chains. Because the hot blast furnace operates continuously, the transmission chains are prone to sudden breakage during valve opening and closing. If two transmission chains break simultaneously or sequentially, the valve disc and its upper connector drop directly into the valve slot under the force of gravity. Since the disc seals of the vertical gate valves in the hot blast furnace area are mostly wedge-shaped, the disc can easily become wedged when it falls directly into the valve slot under the force of gravity, preventing the vertical gate valve from opening even after the transmission chains are restored. This damages the disc and seriously impacts normal hot blast furnace operation.

[0003] When a valve disc falls into the valve slot, the current solution is to adjust the top screw at the bottom header of the vertical gate valve to pry the disc. If the disc is slightly tilted to one side, a sledgehammer is used to strike the disc against both sides of the valve body to free it from the wedging. If the disc sealing surface is severely damaged and leaks occur, production must be stopped and the valve replaced. However, these measures cannot prevent the problem before it occurs and can only be handled afterward, which is a complex and time-consuming process. If not resolved in a timely manner, the blast furnace may even be shut down for treatment, seriously affecting production efficiency and equipment stability. Summary of the Invention

[0004] In response to the defects in the prior art, the present application provides a protection system for a vertical gate valve of a hot blast furnace to solve the problem of low efficiency and difficulty in handling the stuck valve plate in the prior art.

[0005] The above-mentioned purpose of this application is mainly achieved through the following technical solutions:

[0006] A protection system for a vertical gate valve of a hot blast furnace, the protection system comprising:

[0007] A transmission frame is used to be mounted on the vertical gate valve, the transmission frame is provided with a guide member, and the transmission frame is provided with a counterweight member that can be raised and lowered;

[0008] A traction member, one end of which is used to fix the valve plate of the vertical gate valve, the other end of which is connected to the counterweight member, the middle part of which is connected to the guide member, and the counterweight member and the valve plate apply traction to the traction member in the same direction, so that when the valve plate loses traction, the traction member can limit the valve plate from falling off.

[0009] In an optional embodiment, the guide member includes two guide portions arranged at intervals, each guide portion is provided with an annular groove, and the middle portion of the traction member extends into the two annular grooves simultaneously.

[0010] In an optional embodiment, the guide portion is rotatably disposed on the transmission frame.

[0011] In an optional embodiment, the transmission frame is provided with a number of mounting shafts corresponding to the guide parts, the guide parts are sleeved on the mounting shafts, and each of the mounting shafts is sleeved with two retaining rings, and the retaining rings are arranged on both sides of the axis of the guide part to limit the axial movement of the guide part along the mounting shaft.

[0012] In an optional embodiment, the counterweight member includes a plurality of counterweight parts with different weight specifications.

[0013] In an optional embodiment, the counterweight further includes two fixing portions and a plurality of locking portions, the two fixing portions are clamped and fixed on both sides of the counterweight, and the locking portions penetrate through and clamp the fixing portions.

[0014] In an optional embodiment, the locking portion includes a locking rod and a locking nut that are threadedly connected.

[0015] In an optional embodiment, two connecting rings are provided on the counterweight, and the two connecting rings are threadedly connected to the opposite outer walls of the counterweight. A hydraulic cylinder is fixed on the transmission frame, and the piston rod of the hydraulic rod is connected to the counterweight, and the connecting rings respectively connect the traction member and the hydraulic cylinder.

[0016] In an optional embodiment, a connecting seat is provided between the traction member and the valve plate, a base plate fixedly connected to the valve plate is provided on the connecting seat, a positioning rod is fixed on the base plate, and the traction member is fixedly connected to the positioning rod.

[0017] In an optional embodiment, connecting components are respectively provided at both ends of the traction member, and the connecting components include connecting ears and multiple snap fasteners. The traction member passes through the connecting ears, and the snap fasteners are fixedly connected to the traction member to limit the separation of the traction member from the connecting ears. The two connecting ears are correspondingly connected to the positioning rod and the counterweight.

[0018] Compared with the prior art, the advantages of this application are:

[0019] The protection system in this application is applied to the protection operation of the vertical gate valve of the hot blast furnace. The protection system includes a transmission frame and a traction member. The transmission frame is used to be mounted on the vertical gate valve. The transmission frame is provided with a guide member. The transmission frame is provided with a counterweight member that can be raised and lowered. One end of the traction member is used to fix the valve plate of the vertical gate valve, and the other end of the traction member is connected to the counterweight member. The middle part of the traction member is connected to the guide member, and the counterweight member and the valve plate apply traction to the traction member in the same direction, so that when the valve plate loses traction, the traction member can limit the valve plate from falling off.

[0020] If the transmission chain breaks, the valve disc risks falling due to a loss of traction. A traction member is connected between the valve disc and the counterweight, which maintains balance with the disc through traction. Because the center of the traction member is connected to the guide, the traction force is in the opposite direction of the weight of the valve disc. Therefore, even if the transmission chain breaks, the traction member can prevent the valve disc from falling and directly falling into the valve slot. This protection system employs a preventative protection mechanism. The counterweight and traction member activate immediately upon transmission chain breakage, preventing the valve disc from falling directly into the valve slot due to gravity. Compared to existing methods that rely solely on post-processing, this significantly improves reliability and safety, avoiding production interruptions caused by wedging or damage to the valve disc. The protection system has a simple and easy-to-implement structure, is easy to install and maintain, reduces costs, and eliminates potential failure points that could arise from complex structures. Under normal operating conditions, the protection system does not interfere with the normal opening and closing operations of the vertical gate valve, ensuring the smooth operation of the hot blast furnace. The protection system only activates as an emergency protection in abnormal situations, such as transmission chain breakage. Because the system can effectively limit the valve plate from falling off to the preset position, it avoids the valve plate from being wedged or damaged. After the transmission chain is repaired, the vertical gate valve can quickly return to normal working condition, greatly reducing the downtime caused by equipment failure and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of the structure of the protection system provided in an embodiment of the present application;

[0023] Figure 2 A partial cross-sectional view of a guide portion provided in an embodiment of the present application;

[0024] Figure 3A partial schematic diagram of the connection socket provided in an embodiment of the present application;

[0025] Figure 4 A partial cross-sectional view of a counterweight provided in an embodiment of the present application;

[0026] In the figure: 100, transmission frame; 200, guide member; 201, guide part; 202, annular groove; 203, mounting shaft; 204, retaining ring; 300, traction member; 400, counterweight member; 401, counterweight part; 402, fixing part; 403, locking part; 404, locking rod; 405, locking nut; 501, connecting ring; 502, connecting seat; 503, base plate; 504, positioning rod; 600, connecting assembly; 601, connecting ear; 602, snap fastener; 701, valve plate; 702, hydraulic cylinder. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to help understand the present invention, but does not constitute a limitation of the present invention. The specific structural and functional details disclosed herein are merely intended to describe exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0028] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a protection system provided in an embodiment of the present application, a protection system for a vertical gate valve of a hot blast furnace, the protection system comprising a transmission frame 100 and a traction member 300, wherein:

[0029] like Figure 1 As shown, the transmission frame 100 is used to be mounted on a vertical gate valve. The transmission frame 100 is provided with a guide member 200 , and a counterweight member 400 that can be raised and lowered is provided on the transmission frame 100 .

[0030] The transmission frame 100 is used to be mounted on the vertical gate valve of the hot blast furnace to provide support and fixation. The transmission frame 100 is provided with a guide member 200, which serves to provide a stable motion path constraint for the traction member 300, ensuring that the traction member 300 can maintain the correct direction and position during movement, and avoiding the failure of the protection system due to the deviation or shaking of the traction member 300. In addition, the transmission frame 100 is also provided with a counterweight member 400 that can be raised and lowered. The lifting function of the counterweight member 400 is to flexibly adjust according to the actual working conditions of the vertical gate valve and the weight of the valve plate 701, ensuring that the counterweight member 400 can provide appropriate traction under different working conditions, thereby achieving effective protection for the valve plate 701.

[0031] like Figure 1As shown, one end of the traction member 300 is used to fix the valve plate 701 of the vertical gate valve, and the other end of the traction member 300 is connected to the counterweight member 400. The middle part of the traction member 300 is connected to the guide member 200, and the counterweight member 400 and the valve plate 701 apply traction to the traction member 300 in the same direction, so that when the valve plate 701 loses traction, the traction member 300 can limit the valve plate 701 from falling off.

[0032] like Figure 1 As shown, the traction member 300 connects the valve plate 701 of the vertical gate valve and the counterweight 400. One end of the traction member 300 is used to securely connect the valve plate 701 of the vertical gate valve, ensuring a secure and reliable connection. This ensures that the traction member 300 can effectively transmit force when the valve plate 701 is subjected to external forces. The other end of the traction member 300 is connected to the counterweight 400, whose weight applies traction to the traction member 300. The middle portion of the traction member 300 is connected to the guide member 200, allowing the traction member 300 to move smoothly along the path of the guide member 200 during movement. Simultaneously, the counterweight 400 and the valve plate 701 apply traction to the traction member 300 in the same direction. This traction direction arrangement ensures that the traction member 300 can effectively prevent the valve plate 701 from falling off if the valve plate 701 loses traction from the transmission chain. When the transmission chain breaks and the valve plate 701 loses its normal traction, the traction of the counterweight 400 acts on the valve plate 701 through the traction member 300, preventing the valve plate 701 from falling directly into the valve slot due to gravity, thereby avoiding the valve plate 701 from being wedged or damaged, and ensuring the safe operation of the hot blast furnace vertical gate valve.

[0033] In an optional embodiment, the protection system in the present application is applied to the protection operation of the vertical gate valve of the hot blast furnace, and the protection system includes a transmission frame 100 and a traction member 300. The transmission frame 100 is used to be mounted on the vertical gate valve, and the transmission frame 100 is provided with a guide member 200. The transmission frame 100 is provided with a counterweight member 400 that can be raised and lowered; one end of the traction member 300 is used to fix the valve plate 701 of the vertical gate valve, and the other end of the traction member 300 is connected to the counterweight member 400. The middle part of the traction member 300 is connected to the guide member 200, and the counterweight member 400 and the valve plate 701 apply traction to the traction member 300 in the same direction, so that when the valve plate 701 loses traction, the traction member 300 can limit the valve plate 701 from falling off.

[0034] In an optional embodiment, the protection system operates as follows: if the transmission chain breaks, the valve plate 701 risks falling due to a loss of traction. The traction member 300 is connected between the valve plate 701 and the counterweight 400, which maintains balance with the valve plate 701 through traction. Because the center of the traction member 300 is connected to the guide member 200, the direction of traction is opposite to the gravity of the valve plate 701. Therefore, even if the transmission chain breaks, the traction member 300 can restrain the valve plate 701 from falling, preventing it from falling directly into the valve slot. This protection system employs a preventative protection mechanism. Through the counterweight 400 and traction member 300, the system immediately activates upon transmission chain breakage, preventing the valve plate 701 from falling directly into the valve slot due to gravity. Compared to existing methods that rely solely on post-processing, this significantly improves reliability and safety, avoiding production interruptions caused by wedging or damage to the valve plate 701. The protection system has a simple structure and is easy to implement, making it easy to install and maintain, reducing costs while also minimizing potential failure points caused by complex structures. Under normal operating conditions, the protection system does not interfere with the normal opening and closing operations of the vertical gate valve, ensuring the normal production and operation of the hot blast furnace. The protection system only functions as an emergency protection in abnormal situations, such as when the transmission chain breaks. Because the system effectively restricts the valve plate 701 from falling to a preset position, preventing it from becoming wedged or damaged, the vertical gate valve can quickly return to normal operation after the transmission chain is repaired, significantly reducing downtime caused by equipment failure and improving production efficiency.

[0035] like Figure 1 As shown, in an optional embodiment, the guide member 200 includes two spaced-apart guide portions 201, each of which is provided with an annular groove 202. The middle portion of the traction member 300 extends into both annular grooves 202. This allows the traction member 300 to slide more stably along the annular grooves 202 of the guide portions 201 during movement, thereby ensuring that the traction member 300 will not deviate or shake when subjected to external forces, thereby improving the reliability and stability of the protection system.

[0036] In an optional embodiment, the guide portion 201 is rotatably disposed on the transmission frame 100. The rotatable guide portion 201 allows the guide portion 201 to be appropriately rotated and adjusted as needed during the movement of the traction member 300, further optimizing the movement path of the traction member 300, reducing friction and wear, and extending the service life of the guide portion 201 and the traction member 300.

[0037] like Figure 1 、 Figure 2 As shown, Figure 2This is a partial cross-sectional view of the guide portion 201 provided in an embodiment of the present application. In an optional embodiment, the transmission frame 100 is provided with a number of mounting shafts 203 corresponding to the guide portions 201, and the guide portions 201 are sleeved on the mounting shafts 203, and each of the mounting shafts 203 is sleeved with two retaining rings 204, and the retaining rings 204 are blocked on both sides of the axis of the guide portion 201 to limit the axial movement of the guide portion 201 along the mounting shaft 203.

[0038] The mounting shaft 203 provides stable support for the guide portion 201 , while the retaining ring 204 plays a key limiting role, ensuring that the guide portion 201 always remains in the correct position during operation, thereby providing reliable protection for the stable movement of the traction member 300 .

[0039] The provision of the retaining ring 204 not only ensures the stability of the guide portion 201 during operation, but also prevents the guide portion 201 from loosening due to external impact or vibration, thereby ensuring the smooth movement of the traction member 300 within the guide portion 201. This is crucial for the reliable operation of the protection system, especially in complex working conditions such as hot blast furnaces that operate at high temperatures, high pressures, and continuously, and can significantly improve the system's service life and operating efficiency.

[0040] like Figure 1 、 Figure 2 as well as Figure 4 As shown, Figure 4 A partial cross-sectional view of the counterweight 400 provided in an embodiment of the present application. In an optional embodiment, the counterweight 400 includes a plurality of counterweight portions 401 with different weight specifications. Based on the diversity of actual working conditions, by providing counterweight portions 401 with a variety of weight specifications, it is possible to flexibly select a suitable counterweight combination according to the specific model of the vertical gate valve, the weight of the valve plate 701, and the different working environments. This adjustability not only improves the versatility of the protection system, but also enables the system to better adapt to the traction requirements under different working conditions, thereby effectively preventing the valve plate 701 from falling off in various situations, ensuring the safe operation of the hot blast furnace. By precisely adjusting the weight of the counterweight 400, precise control of the traction force can be achieved, further optimizing the performance of the protection system.

[0041] like Figure 1 、 Figure 2 as well as Figure 4 As shown, in an optional embodiment, the counterweight 400 further includes two fixing portions 402 and a plurality of locking portions 403 , wherein the two fixing portions 402 are clamped and fixed on both sides of the counterweight portion 401 , and the locking portions 403 pass through and clamp the fixing portions 402 .

[0042] Using a combination of clamping and locking, the counterweight 401 is securely clamped to the transmission frame 100 by the fixing portion 402, while the locking portion 403 further enhances the securing effect. The locking portion 403 not only provides additional stability but also ensures that the counterweight 400 will not loosen due to vibration or impact during long-term operation. This dual securing mechanism significantly improves the reliability of the counterweight 400 and provides a strong guarantee for the stable operation of the protection system. Furthermore, this design facilitates the installation and replacement of the counterweight 400, improving system maintenance efficiency.

[0043] like Figure 1 、 Figure 2 as well as Figure 4 As shown, in an optional embodiment, the locking portion 403 includes a threaded locking rod 404 and a locking nut 405. The threaded connection of the locking rod 404 and locking nut 405, based on the self-locking principle of the threads, makes the installation and removal of the locking portion 403 more convenient and quick, while also providing reliable locking force. By tightening the locking nut 405 on the locking rod 404, the counterweight 400 is securely fixed. This not only improves installation and maintenance efficiency, but also enhances system safety and reduces the risk of failure due to loosening.

[0044] like Figure 4 As shown, in an optional embodiment, two connecting rings 501 are provided on the counterweight 400, and the two connecting rings 501 are threadedly connected to the opposite outer walls of the counterweight 400. A hydraulic cylinder 702 is fixedly provided on the transmission frame 100, and the piston rod of the hydraulic rod is connected to the counterweight 400. The connecting rings 501 respectively connect the traction member 300 and the hydraulic cylinder 702.

[0045] Hydraulic cylinder 702 provides additional power, further enhancing the counterweight 400's ability to adjust the traction force. The piston rod of hydraulic cylinder 702 is connected to the counterweight 400 via a connecting ring 501, allowing precise control of the traction force. This not only improves the system's flexibility and adaptability, but also enhances the reliability of the protection system through the smoothness of the hydraulic transmission. Connecting ring 501 further enhances the stability of the connection between the traction member 300 and the counterweight 400, ensuring the overall performance of the system.

[0046] like Figure 1 、 Figure 2 as well as Figure 3 As shown, Figure 3This is a partial schematic diagram of the connecting seat 502 provided in an embodiment of the present application. In an optional embodiment, a connecting seat 502 is provided between the traction member 300 and the valve plate 701, and a base plate 503 fixedly connected to the valve plate 701 is provided on the connecting seat 502, and a positioning rod 504 is fixedly provided on the base plate 503, and the traction member 300 is fixedly connected to the positioning rod 504.

[0047] The traction member 300 is securely connected to the valve plate 701 via the base plate 503 and the positioning rods 504. This not only ensures a secure and reliable connection between the traction member 300 and the valve plate 701, but also provides a precise connection point through the positioning rods 504, allowing the traction force to be accurately applied to the valve plate 701. This facilitates installation and maintenance, while also improving the stability and reliability of the system.

[0048] like Figure 1 、 Figure 2 as well as Figure 3 As shown, in an optional embodiment, a connecting assembly 600 is respectively provided at both ends of the traction member 300, and the connecting assembly 600 includes a connecting ring 501 and a plurality of fasteners 602. The traction member 300 passes through the connecting ring 501, and the fasteners 602 are fixedly connected to the traction member 300 to limit the separation of the traction member 300 from the connecting ring 501. The two connecting ears 601 are correspondingly connected to the positioning rod 504 and the counterweight 400.

[0049] The traction member 300 is securely fastened to the positioning rod 504 and the counterweight 400 via the connecting lugs 601 and the latches 602. The latches 602 allow the traction member 300 to be easily secured within the connecting lugs 601 during installation, while preventing the traction member 300 from separating from the connecting lugs 601 during operation. This improves the connection stability of the traction member 300, facilitates installation and removal, and enhances system maintenance efficiency. The connecting lugs 601 further enhance the connection stability between the traction member 300, the positioning rod 504, and the counterweight 400, ensuring the overall performance of the system.

[0050] It should be understood that the terms first, second, etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the exemplary embodiments of the present invention.

[0051] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0052] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships in which the disclosed product is conventionally placed when in use, or are orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0053] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0054] The terms used herein are used only to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise," "include," "include," and / or "comprising" when used herein specify the presence of claimed features, integers, steps, operations, units, and / or components, and do not preclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0055] In the following description, certain details are provided to facilitate a thorough understanding of the exemplary embodiments. However, one of ordinary skill in the art will appreciate that the exemplary embodiments may be practiced without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail in order to avoid obscuring the exemplary embodiments.

[0056] The above are merely specific embodiments of the present application to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather is intended to conform to the widest scope consistent with the principles and novel features of the present application.

[0057] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

Claims

1. A protection system for a vertical gate valve of a hot blast furnace, characterized in that: The protection system comprises: A transmission frame is used to be mounted on the vertical gate valve, the transmission frame is provided with a guide member, and the transmission frame is provided with a counterweight member that can be raised and lowered; A traction member, one end of which is used to fix the valve plate of the vertical gate valve, the other end of which is connected to the counterweight member, the middle part of which is connected to the guide member, and the counterweight member and the valve plate apply traction to the traction member in the same direction, so that when the valve plate loses traction, the traction member can limit the valve plate from falling off.

2. The protection system for a vertical gate valve of a hot blast furnace according to claim 1, characterized in that: The guide member includes two guide parts arranged at intervals, each guide part is provided with an annular groove, and the middle part of the traction member extends into the two annular grooves at the same time.

3. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 2, characterized in that: The guide portion is rotatably arranged on the transmission frame.

4. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 3, characterized in that: The transmission frame is provided with a number of mounting shafts corresponding to the guide parts, the guide parts are sleeved on the mounting shafts, and each of the mounting shafts is sleeved with two retaining rings, which are arranged on both sides of the axis of the guide part to limit the axial movement of the guide part along the mounting shaft.

5. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 1, characterized in that: The counterweight component includes a plurality of counterweight parts with different weight specifications.

6. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 5, characterized in that: The counterweight further comprises two fixing parts and a plurality of locking parts. The two fixing parts are clamped and fixed on both sides of the counterweight, and the locking parts penetrate through and clamp the fixing parts.

7. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 6, characterized in that: The locking portion includes a locking rod and a locking nut that are threadedly connected.

8. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 1, characterized in that: The counterweight is provided with two connecting rings, which are threadedly connected to the opposite outer walls of the counterweight. A hydraulic cylinder is fixed on the transmission frame, the piston rod of the hydraulic rod is connected to the counterweight, and the connecting rings are respectively connected to the traction member and the hydraulic cylinder.

9. The protection system for a vertical gate valve of a hot blast furnace as claimed in claim 1, characterized in that: A connecting seat is provided between the traction member and the valve plate. A base plate fixedly connected to the valve plate is provided on the connecting seat. A positioning rod is fixedly provided on the base plate. The traction member is fixedly connected to the positioning rod.

10. The protection system for a vertical gate valve of a hot blast furnace according to claim 9, characterized in that: The two ends of the traction member are respectively provided with a connecting assembly, and the connecting assembly includes a connecting ear and a plurality of snap fasteners. The traction member passes through the connecting ear, and the snap fasteners are fixedly connected to the traction member to limit the separation of the traction member from the connecting ring. The two connecting ears are correspondingly connected to the positioning rod and the counterweight.

Images