Special wear-resistant valve for sintering machine

Abstract

The utility model discloses a special wear-resistant valve for a sintering machine, which belongs to the technical field of sintering and comprises an inner valve body, outer valve bodies, a turnover shaft, a turnover valve plate and a fixed valve plate, the outer valve bodies are arranged on two sides of the inner valve body, and a cavity is formed between the inner valve body and the outer valve bodies; the overturning shaft is rotationally connected to the inner valve body and the outer valve body, and an overturning valve plate is fixedly connected to the overturning shaft; the fixed valve and the fixed valve plate are fixedly connected to the inner valve body, the area of the fixed valve plate is 10%-90% of the area of the inner valve body, an accumulation angle for containing foreign matter is formed between the fixed valve plate and the inner valve body, impact of high-speed falling materials can be effectively resisted, the service life of the air duct valve is prolonged, and the maintenance difficulty of the air duct valve is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sintering, in particular to a special wear-resistant valve for a sintering machine. Background Art

[0002] Sintering technology occupies an important position in the metallurgical industry. It is mainly used to sinter powdered iron ore into blocks for smelting in blast furnaces. Modern sintering technology basically adopts negative pressure sintering method, and its core equipment includes sintering machine, air duct and bellows. The sintering machine is located above the system and is responsible for loading and sintering iron ore powder; the bellows is located below the system and is connected to the sintering machine through a series of air ducts. It is used to extract flue gas and provide necessary airflow to maintain the sintering process. The sintering machine and the bellows are connected through multiple air ducts. Each air duct needs to adjust the air volume passing through to meet the airflow requirements at different positions. At this time, the role of the air duct regulating valve is particularly important. However, in the prior art, there are some problems with the structural layout and operation mode of the sintering machine, which affects the service life and maintenance convenience of the air duct regulating valve.

[0003] In the prior art Figure 1 As shown, during the sintering process, foreign objects will fall along the air duct due to the sintering materials falling from the bottom of the sintering machine when it is running and the sintering machine grates (hereinafter collectively referred to as foreign objects) that are not replaced in time. The air duct design is usually a structure with an inclined upper section and a vertical lower section. In the initial stage, the falling speed of foreign objects in the inclined air duct is relatively slow, but after passing through the inclined air duct, the speed of foreign objects is significantly accelerated. When foreign objects enter the vertical air duct, they will collide with the side walls of the vertical air duct, causing the side walls of the vertical air duct to be easily worn and damaged.

[0004] To avoid damage to the vertical air duct, existing technologies such as Figure 1 As shown in the figure, the duct control valve is usually installed on the inclined duct. However, this installation method has many inconveniences. First, the inclined duct is at high altitude, and the inspection and maintenance of the valve is difficult and dangerous. Second, although the valve is installed on the inclined duct to reduce the direct impact of foreign objects, the problem of damage to the vertical duct still exists.

[0005] In order to better protect the vertical air duct and improve the durability of the valve, some current designs attempt to install the valve on the vertical air duct. However, the valve on the vertical air duct will also be impacted by foreign objects falling at high speed, causing the valve to be easily damaged and requiring frequent inspection and maintenance. This frequent maintenance work not only increases the operating cost, but also affects the continuity and stability of sintering production.

[0006] Based on the above problems, the utility model proposes a special wear-resistant valve for a sintering machine, aiming to provide a solution that can effectively resist the impact of high-speed falling materials, extend service life, and reduce maintenance difficulty. Utility Model Content

[0007] The utility model aims to provide a special wear-resistant valve for a sintering machine to solve the problems raised in the above-mentioned prior art.

[0008] Provided is a special wear-resistant valve for sintering machine, including:

[0009] An inner valve body, with outer valve bodies disposed on both sides of the inner valve body;

[0010] A flip shaft, the flip shaft is rotatably connected to the inner valve body and the outer valve body, and a flip valve plate is fixedly connected to the flip shaft;

[0011] A fixed valve plate is fixedly connected to the inner valve body, the area of ​​the fixed valve plate is 10% to 90% of the area of ​​the inner valve body, and an accumulation angle for accommodating foreign matter is formed between the fixed valve plate and the inner valve body.

[0012] The area of ​​the fixed valve plate is the internal area of ​​the inner valve body to form a stacking angle. The area of ​​the fixed valve plate is less than 10% of the internal area of ​​the inner valve body. Due to the accumulation of foreign matter by wind in the air duct, the impact force is too large so that the foreign matter cannot be accumulated between the fixed valve plate and the inner valve body to form a stacking angle. When the area of ​​the fixed valve plate is greater than 90% of the internal area of ​​the inner valve body, the foreign matter contains a certain amount of water (water content 8%), which makes it impossible for the foreign matter to pass through the entire valve, and the foreign matter cannot pass through, which is easy to block the entire valve; an stacking angle for accommodating foreign matter is formed between the fixed valve plate and the inner valve body;

[0013] The valve is installed as a whole on the vertical air duct. When foreign matter falls into the inner valve body, it first impacts the fixed valve plate. The foreign matter will accumulate between the fixed valve plate and the inner valve body to form an accumulation angle. The presence of foreign matter on the accumulation angle forms a protective layer to reduce the damage to the inner valve body and the fixed valve plate caused by direct impact of foreign matter. When the foreign matter accumulates to a certain amount, the flip shaft drives the flip valve plate to rotate downward by a certain angle, and excess foreign matter slides through the opening area between the fixed valve plate and the flip valve plate, thereby cleaning up the accumulated foreign matter and preventing the foreign matter from clogging the entire inner valve body. This effectively solves the problem that traditional valves are easily damaged in vertical air ducts, extends the service life of the valve, greatly reduces the difficulty of valve maintenance, and can effectively resist the impact of high-speed falling materials.

[0014] As a further embodiment of the present utility model: a cavity is formed between the inner valve body and the outer valve body. When the entire valve is used for a long time, if the inner valve body is damaged and broken, foreign matter will enter the cavity formed by the inner valve body and the outer valve body through the gap of the damaged inner valve body. When a certain amount is reached, the foreign matter in the cavity is filled with accumulation, sealing the damaged gap of the inner valve body. The foreign matter will form a stacking angle between the fixed valve plate and the inner valve body again, thereby protecting the inner valve body and the fixed valve plate from damage due to impact, effectively solving the problem that traditional valves are easily damaged in vertical air ducts, extending the service life of the valve, and greatly reducing the difficulty of maintenance.

[0015] As a further embodiment of the utility model: the material of the inner valve body and the outer valve body are both wear-resistant steel plates, and the wear-resistant steel plates are NM400 wear-resistant steel plates. Both the inner valve body and the outer valve body adopt NM400 wear-resistant steel plates. NM400 wear-resistant steel plates are a high-strength wear-resistant steel with excellent wear resistance. They can effectively resist the high-speed impact and friction of sintering materials and sintering machine grates that are not replaced in time (hereinafter collectively referred to as foreign matter), and the heat resistance temperature of NM400 steel plates can reach 1000°C. Therefore, in the sintering process, it is ensured that the entire valve can operate stably for a long time under an impact environment without the problem of material performance degradation.

[0016] As a further embodiment of the utility model: a driving mechanism is also provided on the flip shaft, and the driving mechanism is used to drive the flip shaft to rotate. The driving mechanism is composed of a driving motor and a double crank-connecting rod mechanism. The output end of the driving motor is fixedly connected to the first crank, one end of the first crank is connected to a connecting rod through a pin shaft, and the other end of the connecting rod is connected to the second crank through a pin shaft, and the second crank is fixed on the flip shaft. During operation, after the driving motor is started, its output shaft rotates, driving the first crank to start rotating. As the first crank rotates, the connecting rod is driven to do reciprocating motion, and the connecting rod drives the second crank to rotate. When the second crank swings, the flip shaft rotates accordingly, driving the flip valve plate to rotate. As the flip shaft rotates, the flip valve plate flips according to a set angle, and excess foreign matter slides along the opening area formed between the inner valve body and the flip valve plate, protecting the inner valve body and the fixed valve plate, thereby completing the rotation of the flip valve plate. The flip shaft drives the flip valve plate to rotate downward by a certain angle, so that excess foreign matter in the inner valve body will slide downward along the opening area formed between the inner valve body and the flip valve plate.

[0017] As a further embodiment of the present utility model: a valve body lining plate is arranged on the inner wall of the inner valve body, and a valve body lining plate is arranged on the outer wall of the inner valve. The material of the valve body lining plate is high chromium alloy cast iron, silicon carbide ceramic alumina, ceramic nickel-based high-temperature alloy, etc. The specific embodiment is high chromium alloy cast iron, which has high hardness (HRC55-65), excellent wear resistance and impact resistance, and good high temperature resistance.

[0018] As a further embodiment of the utility model: a flip lining plate is arranged on the flip valve plate, and the material of the flip lining plate is high chromium alloy cast iron, which has excellent wear resistance and impact resistance, good high temperature resistance, and can effectively reduce the impact force of foreign objects on the flip valve plate.

[0019] As a further embodiment of the utility model: flange plates are provided on the upper and lower sides of the inner valve body. The flange plates are provided on the upper and lower sides to ensure the stability of the valve in the air duct system, and will not be displaced due to fluid pressure or other external forces, thereby ensuring the reliability and stability of the valve under complex working conditions, while improving the convenience of installation and maintenance. In the negative pressure system of the sintering machine, the flange plate can ensure the tight connection between the entire valve and the vertical air duct to prevent leakage in a negative pressure environment. During the operation of the sintering machine, the reliability of the flange plate connection can ensure the normal operation of the entire valve under a high temperature and high pressure environment, and prevent shutdown or leakage due to failure of the connection part.

[0020] As a further embodiment of the utility model: the area of ​​the fixed valve plate is 20% to 50% of the area of ​​the inner valve body. The optimal fixed valve plate area is controlled within the range of 20% to 50% of the area of ​​the inner valve body, thereby ensuring the stability of the overall structure of the valve. The strength of the valve will not be affected by the fixed valve plate being too large, and sufficient surface area can be provided for the accumulation of foreign matter without weakening the structural strength and stability of the inner valve body.

[0021] As a further embodiment of the utility model: in order to further increase the connection stability of the fixed valve plate to the inner valve body, a supporting rib plate (not shown in the figure) is also arranged at the bottom of the fixed valve plate. The inclined support rib plate can further increase the connection strength of the fixed valve plate on the inner valve body.

[0022] As a further embodiment of the utility model: a fixed valve plate inner lining plate is also provided on the fixed valve plate, and the fixed valve plate inner lining plate is made of silicon carbide ceramic material, which has high strength and toughness so that it has good impact resistance when subjected to material impact, can maintain its excellent performance in a high temperature environment, and adapt to the working conditions of the sintering machine, which can not only enhance the wear resistance of the fixed valve plate, but also improve its impact resistance.

[0023] As a further embodiment of the utility model: the inner valve body and the outer valve body are circular valve bodies or square valve bodies, and the shapes of the inner valve body and the outer valve body can also be circular or square, depending on the specific shape of the vertical air duct.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] The valve is installed as a whole on the vertical air duct. When foreign matter falls into the inner valve body, it will first impact on the fixed valve plate. The foreign matter will form an accumulation angle between the fixed valve plate and the inner valve body. When the foreign matter accumulates to a certain amount, the flip shaft drives the flip valve plate to rotate downward by a certain angle, so that the excess foreign matter will slide down along the opening area formed between the inner valve body and the flip valve plate, and the accumulated foreign matter between the fixed valve plate and the inner valve body will form a protective layer, thereby protecting the inner valve body and the fixed valve plate from damage due to impact, effectively solving the problem that traditional valves are easily damaged in vertical air ducts, extending the service life of the valve, and greatly reducing the difficulty of maintenance;

[0026] In addition, after the inner valve body is damaged, the self-repair function of foreign matter accumulation further improves the reliability and durability of the valve, which can effectively resist the impact of high-speed falling materials, extend the service life and reduce the difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present drawings 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 drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the installation of the air duct valve in the prior art;

[0029] Figure 2 This is a schematic diagram of the overall structure of a special wear-resistant valve for a sintering machine;

[0030] Figure 3 It is a schematic diagram of the overall structure of a special wear-resistant valve for a sintering machine from a top view;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-section structure in the AA direction;

[0032] Figure 5 for Figure 3 Schematic diagram of the cross-section structure in the middle BB direction;

[0033] Figure 6 This is a schematic diagram of the structure of the inner valve body provided by the utility model when it is in a damaged state;

[0034] Figure 7 The utility model provides another structural schematic diagram of a special wear-resistant valve for a sintering machine.

[0035] In the figure: 1. inner valve body; 11. valve body inner lining plate; 12. flange plate; 2. outer valve body; 3. flip shaft; 4. flip valve plate; 41. flip inner lining plate; 5. fixed valve plate; 51. fixed valve plate inner lining plate; 6. stacking angle; 7. driving mechanism; 101. cavity; 111. sintering machine trolley; 112. sintering machine platform floor; 113. inclined air duct; 114. original air duct regulating valve; 115. air duct regulating valve of the utility model; 116. air duct layer floor; 117. vertical air duct; 118. bellows. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0037] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0038] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0039] It should be noted that Figure 5 and Figure 6 The direction of the black arrow is the direction of foreign body impact.

[0040] See also Figure 1-7As shown, in the embodiment of the utility model, a special wear-resistant valve for a sintering machine includes an inner valve body 1, an outer valve body 2, a flip shaft 3, a flip valve plate 4 and a fixed valve plate 5. The outer valve body 2 is arranged on both sides of the inner valve body 1. The outer valve body 2 is used to protect the external structure of the inner valve body 1. The flip shaft 3 of the outer valve body 2 is rotatably connected to the inner valve body 1 and the outer valve body 2. The flip shaft 3 is fixedly connected with the flip valve plate 4. The flip valve plate 4 is fixed on the flip shaft 3 and rotates with the flip shaft 3; the fixed valve plate 5 is fixedly connected to the inner valve body 1, and the area of ​​the fixed valve plate 5 is the inner portion of the inner valve body 1. 10% to 90% of the area is used to form an accumulation angle 6. The area of ​​the fixed valve plate 5 is less than 10% of the internal area of ​​the inner valve body 1. Due to the accumulation of foreign matter by the wind in the air duct, the impact force is too large so that the foreign matter cannot be fixed on the valve plate 5 and accumulate with the inner valve body 1 to form an accumulation angle 6. When the area of ​​the fixed valve plate 5 is greater than 90% of the internal area of ​​the inner valve body 1, the foreign matter contains a certain amount of water (water content 8%), which makes it impossible for the foreign matter to pass through the entire valve, and the foreign matter cannot pass through, and it is easy to block the entire valve; an accumulation angle 6 for accommodating foreign matter is formed between the fixed valve plate 5 and the inner valve body 1;

[0041] The valve is installed as a whole on the vertical air duct. When foreign matter falls into the inner valve body 1, it first impacts the fixed valve plate 5. The foreign matter accumulates between the fixed valve plate 5 and the inner valve body 1 to form an accumulation angle 6. The presence of foreign matter on the accumulation angle 6 forms a protective layer to reduce the damage to the inner valve body 1 and the fixed valve plate 5 caused by direct impact of foreign matter. When the foreign matter accumulates to a certain amount, the flip shaft 3 drives the flip valve plate 4 to rotate downward by a certain angle, and the excess foreign matter slides down through the opening area between the fixed valve plate 5 and the flip valve plate 4, thereby cleaning the accumulated foreign matter and preventing the foreign matter from clogging the inner valve body 1. The excess foreign matter slides downward along the opening area formed between the inner valve body 1 and the flip valve plate 4, which effectively solves the problem that traditional valves are easily damaged in vertical air ducts, prolongs the service life of the valve, and greatly reduces the difficulty of valve maintenance. It can effectively resist the impact of high-speed falling materials, prolong the service life of the valve, and reduce the difficulty of valve maintenance.

[0042] In one embodiment, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in addition, a cavity 101 is formed between the inner valve body 1 and the outer valve body 2. Specifically, the outer valve body 2 is arranged at the outer wall position of the inner valve body 1. When used for a long time, if the inner valve body 1 is damaged by the impact of foreign matter and the inner valve body 1 is damaged, the foreign matter will enter the cavity 101 formed by the inner valve body 1 and the outer valve body 2 from the damaged gap of the inner valve body 1. When the foreign matter reaches a certain amount, the foreign matter in the cavity is full of accumulation, and the damaged gap of the inner valve body 1 is sealed. The foreign matter will be accumulated again on the stacking angle 6 on the fixed valve plate 5 and the inner valve body 1 until a line is formed to protect the inner valve body 1 and the fixed valve plate 5 from being damaged by impact. Especially after the inner valve body 1 is damaged, the self-repairing function of the accumulation of foreign matter further improves the reliability and durability of the valve as a whole. Even if the inner valve body 1 is damaged, the entire valve does not need to be replaced immediately, which further extends the service life of the entire valve in the vertical air duct 117, and greatly reduces the difficulty of subsequent maintenance of the entire valve.

[0043] For further information, see Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in order to facilitate the rotation of the flip shaft 3, a driving mechanism 7 is further provided on the side of the flip shaft 3 away from the flip valve plate 4. The driving mechanism 7 is used to drive the flip shaft 3 to rotate. In a specific embodiment, the driving mechanism 7 is composed of a driving motor and a double crank connecting rod mechanism (not shown in the figure), which can drive the flip shaft 3 to rotate. The connection relationship is as follows: the output end of the driving motor is fixedly connected to the first crank, one end of the first crank is connected to the connecting rod through a pin shaft, and the other end of the connecting rod is connected to the second crank through a pin shaft, and the second crank is fixed on the flip shaft 3;

[0044] During the operation, after the driving motor is started, its output shaft rotates, driving the first crank to start rotating. As the first crank rotates, the connecting rod is driven to do reciprocating motion, and the connecting rod drives the second crank to rotate. When the second crank swings, the flip shaft 3 rotates accordingly, driving the flip valve plate 4 to rotate. As the flip shaft 3 rotates, the flip valve plate 4 flips according to the set angle, and excess foreign matter slides along the opening area formed between the inner valve body 1 and the flip valve plate 4, protecting the inner valve body 1 and the fixed valve plate 5, thereby completing the rotation of the flip valve plate 4. The flip shaft 3 drives the flip valve plate 4 to rotate downward by a certain angle, so that excess foreign matter in the inner valve body 1 will slide downward along the opening area formed between the inner valve body 1 and the flip valve plate 4.

[0045] For further examples, see Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in order to further reduce the impact force on the inner valve body 1, a valve body inner lining plate 11 is provided on the inner wall of the inner valve body 1. The material of the valve body lining plate 11 is high chromium alloy cast iron, silicon carbide ceramic alumina, ceramic nickel-based high-temperature alloy, etc. Specifically, the present embodiment is high chromium alloy cast iron, which has high hardness (HRC55-65), excellent wear resistance and impact resistance, and good high temperature resistance.

[0046] For further information, see Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in order to further reduce the impact force of foreign objects on the flip valve plate 4 and avoid damage during use, a flip lining plate 41 is provided on the flip valve plate 4. The material of the flip lining plate 41 is high chromium alloy cast iron, silicon carbide ceramic alumina, ceramic nickel-based high-temperature alloy, etc. Specifically, in this embodiment, the material of the flip lining plate 41 is high chromium alloy cast iron, which has excellent wear resistance and impact resistance, good high temperature resistance, and can effectively reduce the impact force of foreign objects on the flip valve plate 4.

[0047] For further information, see Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, flange plates 12 are provided on the upper and lower sides of the inner valve body 1. The flange plates 12 provided on the upper and lower sides of the inner valve body 1 are designed with bolt holes, and the entire valve can be accurately aligned and fastened with the vertical air duct 117 by bolts to ensure the installation accuracy of the entire valve. The flange plates 12 are provided on the upper and lower sides to ensure the stability of the valve in the air duct system, and will not shift due to fluid pressure or other external forces, thereby ensuring the reliability and stability of the valve under complex working conditions and improving the convenience of installation and maintenance. In the negative pressure system of the sintering machine, the flange plate 12 can ensure the tight connection between the entire valve and the vertical air duct to prevent leakage in a negative pressure environment. During the operation of the sintering machine, the reliability of the connection of the flange plate 12 can ensure the normal operation of the entire valve under a high temperature and high pressure environment to prevent shutdown or leakage due to failure of the connection part.

[0048] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in order to make it easier for foreign matter to accumulate on the accumulation angle 6 for accommodating foreign matter between the fixed valve plate 5 and the inner valve body 1, the area of ​​the fixed valve plate 5 is 20% to 50% of the inner area of ​​the inner valve body 1, and the area of ​​the fixed valve plate 5 is controlled within the range of 20% to 50% of the inner area of ​​the inner valve body 1. When the area of ​​the fixed valve plate 5 is greater than or less than 20% of the inner area of ​​the inner valve body 1, the foreign matter will be frequently blown off due to the excessive air volume in the vertical air duct 117, and there will be insufficient bearing area for the foreign matter to form the accumulation angle 6 between the fixed valve plate 5 and the inner valve body 1. As a result, the stacking angle 6 cannot be formed stably, and the fixed valve plate 5 and the inner valve body 1 cannot be protected. When the area of ​​the fixed valve plate 5 is larger than 50% of the internal area of ​​the inner valve body 1, foreign matter will frequently pass through, causing wear of the entire valve, which is not conducive to the stability of the overall structure of the valve. In addition, if the area of ​​the fixed valve plate 5 is controlled within the range of 20% to 50% of the internal area of ​​the inner valve body 1, the strength of the valve will not be affected by the excessive size of the fixed valve plate 5. Sufficient surface area can be provided for the accumulation of foreign matter without weakening the structural strength and stability of the entire inner valve body 1.

[0049] For further information, see Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a fixed valve plate lining plate 51 is also provided on the fixed valve plate 5. The fixed valve plate lining plate 51 is made of materials with good wear resistance and impact resistance, such as silicon carbide ceramics and high chromium alloy cast iron. Specifically, in the present embodiment, the fixed valve plate lining plate 51 is made of silicon carbide ceramic material, which has high strength and toughness so that it has good impact resistance when subjected to material impact, can maintain its excellent performance in a high temperature environment, and adapt to the working conditions of the sintering machine. It can not only enhance the wear resistance of the fixed valve plate 5, but also improve its impact resistance.

[0050] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in order to further increase the connection stability of the fixed valve plate 5 to the inner valve body 1, a supporting rib plate (not shown in the figure) is also provided at the bottom of the fixed valve plate 5. The inclined supporting rib plate can further increase the connection strength of the fixed valve plate 5 on the inner valve body 1, which can reduce wear and tear, extend the service life of the fixed valve plate 5, reduce the frequency of maintenance and replacement, absorb and disperse the impact force on the fixed valve plate 5, enhance the impact resistance of the fixed valve plate 5, prevent the fixed valve plate 5 from loosening, and ensure a firm connection.

[0051] For further information, see Figure 3 and Figure 7As shown, the inner valve body 1 and the outer valve body 2 are round or square. The shapes of the inner valve body 1 and the outer valve body 2 can also be square, depending on the specific shape of the vertical air duct 117.

[0052] During operation, the sintering machine trolley 111 is filled with sintering materials and continuously operates above the inclined air duct 113. The original air duct regulating valve 114 is installed on the inclined air duct 113, which can reduce the wear of the original air duct regulating valve 114 by the sintering materials. However, the sintering materials and the damaged sintering machine grates (hereinafter collectively referred to as foreign matter) will hit the vertical air duct 117 after passing through the inclined air duct 113, resulting in a very short service life of the vertical air duct 117.

[0053] The air duct regulating valve 115 of the utility model is installed on the vertical air duct 117, that is, on the vertical air duct 117. Through the structural setting and improvement of the air duct regulating valve 115 of the utility model, the failure rate of the vertical air duct 117 is minimized, and the inspection and maintenance are very convenient. The unique valve body structure greatly increases the service life of the valve body.

[0054] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A special wear-resistant valve for sintering machine, characterized in that: include: An inner valve body (1), wherein outer valve bodies (2) are arranged on both sides of the inner valve body (1); A flip shaft (3), the flip shaft (3) being rotatably connected to the inner valve body (1) and the outer valve body (2), and a flip valve plate (4) being fixedly connected to the flip shaft (3); A fixed valve plate (5) is fixedly connected to the inner valve body (1), the area of ​​the fixed valve plate (5) is 10% to 90% of the area of ​​the inner valve body (1), and a stacking angle (6) for accommodating foreign matter is formed between the fixed valve plate (5) and the inner valve body (1).

2. A special wear-resistant valve for sintering machine according to claim 1, characterized in that: A cavity (101) is formed between the inner valve body (1) and the outer valve body (2).

3. A special wear-resistant valve for sintering machine according to claim 1 or 2, characterized in that: The inner valve body (1) and the outer valve body (2) are both made of wear-resistant steel plates, and the wear-resistant steel plates are NM400 wear-resistant steel plates.

4. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: A driving mechanism (7) is also provided on the side of the flip shaft (3) away from the flip valve plate (4), and the driving mechanism (7) is used to drive the flip shaft (3) to rotate.

5. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: A valve body inner lining plate (11) is arranged on the inner wall of the inner valve body (1).

6. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: The turnover valve plate (4) is provided with a turnover lining plate (41).

7. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: Flange plates (12) are provided on both the upper and lower sides of the inner valve body (1).

8. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: The area of ​​the fixed valve plate (5) is 20% to 50% of the area of ​​the inner valve body (1).

9. A special wear-resistant valve for sintering machine according to claim 8, characterized in that: The fixed valve plate (5) is also provided with a fixed valve plate lining plate (51).

10. The special wear-resistant valve for sintering machine according to claim 1, characterized in that: The inner valve body (1) and the outer valve body (2) are round or square.

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