Material mixing and feeding device for thermal power plant

Abstract

The utility model relates to the technical field of material mixing and feeding equipment, and discloses a material mixing and feeding device for a thermal power plant, which comprises a feeding frame, a processing assembly comprises a crushing roller arranged in a hopper, rotating wheels are arranged at the two ends of the crushing roller, a fixing frame is arranged outside the rotating wheels, an ejector rod is arranged in the fixing frame, and the ejector rod is connected with the crushing roller. A magnetic plate is embedded in the ejector rod; sliding grooves are formed in the two sides of the inner wall of the hopper correspondingly, push plates are arranged in the two sliding grooves correspondingly, extension plates are arranged at the two ends of each push plate correspondingly, and electromagnets and pressure plates are arranged on the inner walls of the other ends of the extension plates. Coal briquettes are preliminarily crushed and pretreated before entering the crushing bin, the operation efficiency and stability of feeding equipment are improved, the push plate on the inner wall of the hopper is driven through rotation of the crushing roller during pretreatment, the coal briquettes are prevented from being clamped and blocked, the coal briquette crushing effect is improved, and the coal briquette crushing efficiency is improved. And the overall processing quality of the feeding equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mixing and feeding equipment, specifically a mixing and feeding device for thermal power plants. Background Technology

[0002] A thermal power plant (or coal-fired power plant) is a power generation facility that uses the heat energy generated by burning fuels such as coal, oil, and natural gas to heat water, turning it into high-temperature, high-pressure steam. The steam is then converted into mechanical energy by a turbine, and finally into electrical energy by a generator. The mixing and feeding device in a thermal power plant is a key piece of equipment used to mix different types of fuels (such as coal and biomass) and uniformly feed them into the boiler for combustion.

[0003] When coal blocks are fed into the mixing and feeding machine, they need to be crushed by a crushing wheel because the coal blocks are of different sizes, thereby improving the completeness and quality of combustion.

[0004] However, if the coal particles are too large or the angle of input is incorrect, the coal may get stuck on both sides of the crushing wheel, preventing it from making full contact with the crushing wheel for crushing. In addition, if the coal has high moisture content, it may stick together, causing blockage on both sides of the crushing wheel, affecting the passage of other coal and thus affecting the stability and operating efficiency of the feeding equipment.

[0005] Therefore, we propose a mixing and feeding device for thermal power plants to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a mixing and feeding device for thermal power plants, in order to solve the problem mentioned in the background art where coal blocks get stuck on both sides of the crushing wheel, resulting in insufficient crushing and blockage that affects the normal operation and stability of the feeding equipment.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a mixing and feeding device for thermal power plants, comprising a feeding frame, a crushing chamber and a hopper arranged outside the feeding frame, a processing component for pre-processing materials arranged inside the hopper, the processing component including a crushing roller arranged inside the hopper, a rotating wheel arranged at both ends of the crushing roller, a fixing frame arranged outside the rotating wheel, a top rod arranged inside the fixing frame, and a magnetic plate embedded inside the top rod;

[0008] Both sides of the inner wall of the hopper are provided with sliding grooves, and push plates are provided inside the two sliding grooves. Both ends of the push plates are provided with extension plates, and the inner wall of the other end of the extension plates is provided with an electromagnet and a pressure plate.

[0009] Preferably, the hopper is located at one end outside the crushing chamber and is connected to the inside of the crushing chamber through a control valve. The crushing roller is located inside the hopper and is rotatably connected to the inner wall of the hopper through a drive shaft.

[0010] Preferably, both ends of the crushing roller are coaxially connected to the rotating wheel, the fixing frame is located on the outer wall of the rotating wheel and connected to the outer wall of the rotating wheel, and one end of the top rod is located inside the fixing frame and is slidably connected to the inside of the fixing frame.

[0011] Preferably, the chute is located on the inner wall of the hopper and is distributed on both sides of the crushing roller. The pusher plate is located inside the chute and is slidably connected to the inner wall of the chute. The other side of the pusher plate has a corrugated structure.

[0012] Preferably, the extension plate is connected to the outside of the push plate by bolts, and the extension plate is embedded in the hopper and corresponds to the rollers at both ends of the crushing roller, and the extension plate is laterally located below the rollers.

[0013] Preferably, the push rod outside the rotating wheel abuts against one end of the extension plate when rotating, and contacts the pressure plate on the inner wall of the extension plate. The electromagnet is embedded and connected to the top of the extension plate, and the electromagnet is magnetically connected to the magnetic plate inside the push rod after activation.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By installing crushing rollers in the feed hopper of the crushing chamber, the coal blocks are pre-treated in the hopper, and larger coal blocks are initially crushed in advance, thereby reducing the particle size of the coal blocks. Pre-treatment improves the effect of coal block crushing or mixing, and also improves the stability of the feeding equipment.

[0016] 2. Furthermore, when the crushing roller rotates inside the hopper, the rotating wheels at both ends of the central shaft rotate synchronously, cooperating with the external push rod to abut against the extension plate at one end of the push plate during rotation. This pulls the extension plate, causing the push plate to extend out from the inner wall of the hopper, thereby pushing the coal blocks stuck on both sides of the crushing roller into contact with the crushing roller, improving the crushing effect, and preventing coal blocks from accumulating in the gaps on both sides of the crushing roller, thus preventing coal blockage or residue, improving the quality of coal block processing, and improving the efficiency and reliability of the crushing structure operation.

[0017] This invention performs preliminary crushing of coal blocks before they enter the crushing chamber, thereby improving the efficiency and stability of the feeding equipment. During the pretreatment, the rotation of the crushing roller drives the push plate on the inner wall of the hopper to prevent coal blocks from getting stuck and blocked, thus improving the crushing effect of the coal blocks and enhancing the overall processing quality of the feeding equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a side view of the feeding device of this utility model;

[0020] Figure 3 This is a structural diagram showing the distribution of the crushing roller and pusher plate of this utility model;

[0021] Figure 4 This is a side view of the rotating wheel and extension plate of this utility model;

[0022] Figure 5 This is an enlarged view of part A of the present invention;

[0023] Figure 6 This is a cross-sectional view of the inside of the hopper of this utility model.

[0024] In the diagram: 1. Feeding rack; 2. Crushing chamber; 3. Hopper; 4. Crushing roller; 401. Rotary wheel; 5. Fixing frame; 501. Top rod; 502. Magnetic plate; 6. Slide groove; 7. Push plate; 8. Extension plate; 801. Electromagnet; 802. Pressure plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figures 1-6A mixing and feeding device for a thermal power plant includes a feeding frame 1. The feeding frame 1 is externally equipped with a crushing chamber 2 and a hopper 3. The crushing chamber 2 is equipped with crushing wheels to crush coal blocks into uniform small pieces, improving combustion efficiency. The hopper 3 temporarily stores coal blocks before they enter the feeding equipment. The processed and mixed material is conveyed through the feeding frame 1 to the next device. The hopper 3 contains a processing component for pre-treating the material, including a crushing roller 4 located inside the hopper 3. The crushing roller 4 can perform preliminary crushing pretreatment on the coal blocks when they enter the hopper 3. Both ends of the crushing roller 4 are equipped with a rotating wheel 401, which is connected to the crushing roller 4 and thus coaxially connected. A fixing frame 5 is provided on the outside of the rotating wheel 401 to house the top rod 501 and to position the angle of the top rod 501 when it moves. The top rod 501 is provided inside the fixing frame 5. When the rotating wheel 401 rotates, the fixing frame 5 will bring the top rod 501 to rotate synchronously with the rotating wheel 401. When the top rod 501 rotates to the area of ​​the extension plate 8, it can push the extension plate 8 to slide to one side. A magnetic plate 502 is embedded inside the top rod 501.

[0027] In this embodiment, coal blocks can be pre-treated by installing crushing rollers 4 inside the hopper 3. Pre-treatment can improve the efficiency of coal block crushing, reduce equipment blockage, and improve the stability of equipment operation.

[0028] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figures 1-6Both sides of the inner wall of the hopper 3 are provided with sliding grooves 6 for housing the push plate 7, limiting the sliding extension distance of the push plate 7 and positioning the angle. Push plates 7 are provided inside both sliding grooves 6. Extension plates 8 are provided at both ends of the push plate 7 and are connected to the push plate 7. Therefore, when the push rod 501 outside the rotary wheel 401 moves the extension plate 8, the push plate 7 simultaneously slides and extends / retracts within the sliding grooves 6. An electromagnet 801 and a pressure plate 802 are provided on the inner wall of the other end of the extension plate 8. At the point where the push rod 501 and the extension plate... When the push plate 7 comes into contact with the pressure plate 802 at one end of the extension plate 8, it presses against the pressure plate 802. When the push plate 7 cannot extend outward in the slide groove 6, the push rod 501 is still rotating, thus increasing the pressure on the pressure plate 802. When the pressure exceeds the set value, the electromagnet 801 is energized and activated, generating magnetic poles that repel the magnetic plates 502 inside the push rod 501 and push the push rod 501 to retract into the fixed frame 5, moving it away from the extension plate 8, thereby causing the push plate 7 to retract into the slide groove 6. The hopper 3 is located at one end outside the crushing chamber 2 and is connected to the control valve. The crushing chamber 2 is internally connected. The crushing roller 4 is located inside the hopper 3 and is rotatably connected to the inner wall of the hopper 3 via a drive shaft. Both ends of the crushing roller 4 are coaxially connected to the rotating wheel 401. The fixing frame 5 is located on the outer wall of the rotating wheel 401 and is connected to the outer wall of the rotating wheel 401. One end of the push rod 501 is located inside the fixing frame 5 and is slidably connected to the inside of the fixing frame 5. The chute 6 is located on the inner wall of the hopper 3 and is distributed on both sides of the crushing roller 4. The push plate 7 is located in the chute 6 and is slidably connected to the inner wall of the chute 6. The push plate 7 is also located inside the chute 6. One side has a corrugated structure. The extension plate 8 is connected to the outside of the push plate 7 by bolts. The extension plate 8 is embedded in the hopper 3 and corresponds to the rollers 401 at both ends of the crushing roller 4. The extension plate 8 is located laterally below the rollers 401. When the rollers 401 rotate, the top rod 501 outside the rollers 401 abuts against one end of the extension plate 8 and contacts the pressure plate 802 on the inner wall of the extension plate 8. The electromagnet 801 is embedded in the top of the extension plate 8 and is magnetically connected to the magnetic plate 502 inside the top rod 501 after activation.

[0029] In this embodiment: when the rotating wheel 401 rotates with the crushing roller 4, it will drive the push rod 501 outside the rotating wheel 401 to rotate accordingly. When the push rod 501 rotates to the area of ​​the extension plate 8, it abuts against one end of the extension plate 8. The rotation of the push rod 501 causes the extension plate 8 to move to one side, and at the same time, it causes the push plate 7 to slide out synchronously in the slide groove 6. This pushes the coal blocks stuck on both sides of the crushing roller 4 to the center area of ​​the crushing roller 4, ensuring that the coal blocks are evenly stressed on the surface of the crushing roller 4 and avoiding the accumulation of coal blocks on both sides of the crushing roller 4, which may cause blockage or residue. When the push plate 7 can no longer extend, the push rod 501 continues to apply pressure to the pressure plate 802 at one end of the extension plate 8. When the pressure exceeds the set value (the pressure value can be set according to the actual situation), the electromagnet 801 is activated, generating magnetic force that repels the magnetic plate 502, pushing the push rod 501 to retract into the fixed frame 5 and away from the extension plate 8. Then, the spring in the slide groove 6 pushes the push plate 7 back to its original position and repeats the cycle.

[0030] Working principle: When in use, coal blocks are first placed into the hopper 3, and the drive shaft is started to make the crushing roller 4 rotate. The coal blocks are pre-treated by the crushing roller 4 in the hopper 3. At the same time as the crushing roller 4 rotates, the wheel 401 at the end of the central shaft of the crushing roller 4 rotates synchronously, and drives the external push rod 501 to rotate. When the push rod 501 rotates to the area of ​​the extension plate 8, it abuts against the extension plate 8 and drives the extension plate 8 to slide through the rotation, and the push plate 7 extends out from the slide groove 6 to push the coal blocks on both sides of the crushing roller 4 to the central area for crushing. Then, when the pressure applied by the push rod 501 to the pressure plate 802 at one end of the extension plate 8 exceeds the set value, the electromagnet 801 is activated. The magnetic pole causes the push rod 501 to retract away from the extension plate 8 and reset. The coal blocks that have been pre-treated and crushed are transported to the crushing chamber 2 through the control valve in the hopper 3 for further processing, and finally fall into the feeding rack 1 for conveying.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mixing and feeding device for a thermal power plant, comprising a feeding frame (1), wherein a crushing bin (2) and a hopper (3) are arranged outside the feeding frame (1), and a processing assembly for pretreating materials is arranged inside the hopper (3), characterized in that: The processing assembly includes a crushing roller (4) arranged inside the hopper (3), both ends of the crushing roller (4) are provided with a rotating wheel (401), the rotating wheel (401) is provided with a fixing frame (5) outside, the fixing frame (5) is provided with a jacking rod (501) inside, the jacking rod (501) is inlaid with a magnetic plate (502) inside; Both sides of the inner wall of the hopper (3) are provided with a chute (6), both the chutes (6) are provided with a push plate (7) inside, both ends of the push plate (7) are provided with an extension plate (8), the other end of the extension plate (8) is provided with an electromagnet (801) and a pressure plate (802) on the inner wall.

2. A mixing and feeding device for a thermal power plant according to claim 1, characterized in that: The hopper (3) is located at one end outside the crushing chamber (2) and is communicated with the inside of the crushing chamber (2) through a control valve, and the crushing roller (4) is located in the hopper (3) and is rotationally connected with the inner wall of the hopper (3) through a driving shaft.

3. A mixing and feeding device for a thermal power plant according to claim 2, characterized in that: Both ends of the crushing roller (4) are coaxially connected with the rotating wheel (401), the fixing frame (5) is located on the outer wall of the rotating wheel (401) and connected with the outer wall of the rotating wheel (401), one end of the jacking rod (501) is located in the fixing frame (5) and is slidingly connected with the inside of the fixing frame (5).

4. A mixing and feeding device for a thermal power plant according to claim 1, characterized in that: The chute (6) is located on the inner wall of the hopper (3) and is distributed on both sides of the crushing roller (4), the push plate (7) is located in the chute (6) and is slidingly connected with the inner wall of the chute (6), and the other side of the push plate (7) is a corrugated structure.

5. A mixing and feeding device for a thermal power plant according to claim 1, characterized in that: The extension plate (8) is connected with the outside of the push plate (7) through bolts, and the extension plate (8) is inlaid in the hopper (3) and corresponds to the rotating wheel (401) at both ends of the crushing roller (4), and the extension plate (8) is transversely located below the rotating wheel (401).

6. A mixing and feeding device for a thermal power plant according to claim 1, characterized in that: The jacking rod (501) outside the rotating wheel (401) abuts against one end of the extension plate (8) when rotating, and contacts with the pressure plate (802) on the inner wall of the extension plate (8), the electromagnet (801) is inlaidly connected with the top of the extension plate (8), and the electromagnet (801) is magnetically connected with the magnetic plate (502) inside the jacking rod (501) after being activated.

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