Biomass boiler feeding mechanism with adjustable speed

Abstract

The utility model discloses a biomass boiler feeding mechanism with adjustable speed, which comprises a conveying tank driven by a servo motor I, the tail end of the conveying tank is connected with a discharging pipe, the upper part of the conveying tank is sequentially connected with a crushing bin, a storage bin and a discharging bin, the top of the crushing bin is connected with a feeding hopper, and the feeding hopper is connected with a discharging pipe. The bottoms of the two ends in the storage bin are connected with a discharging plate through driving shafts, a second weighing sensor is installed at the bottom of the discharging plate, a discharging hopper is arranged in the discharging bin, a first weighing sensor is installed at the bottom of the discharging hopper, the discharging hopper is connected with the conveying tank through a discharging pipe, and an electromagnetic valve is installed on the discharging pipe. According to the device, the feeding hopper, the smashing bin, the storage bin, the first weighing sensor, the discharging bin, the discharging hopper, the electromagnetic valve, the discharging pipe and the conveying tank are arranged, the feeding amount is further accurately controlled, the purpose of accurately adjusting the feeding amount is achieved, and the combustion efficiency of the boiler can be conveniently detected.

Description

Technical Field

[0001] This utility model relates to the field of biomass boiler technology, and in particular to a biomass boiler feeding mechanism with adjustable speed. Background Technology

[0002] A biomass boiler is a thermal power device that uses biomass materials as fuel. An existing patent (publication number: CN216079872U) discloses a fuel feeding device for a biomass steam boiler. This invention, by setting up a conveyor box and a screw feeder shaft, can achieve the purpose of feeding and also adjust the feeding speed and thus the feeding amount by adjusting the rotation speed of the screw feeder shaft, thereby improving fuel utilization. However, in practical applications, the feeding amount per unit time cannot be precisely adjusted; only a rough estimate can be obtained, which is inconvenient for subsequent testing of the boiler's combustion efficiency. Therefore, we propose a biomass boiler feeding mechanism with adjustable speed. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a biomass boiler feeding mechanism with adjustable speed.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] Design a speed-adjustable biomass boiler feeding mechanism, including a conveying tank driven by a servo motor, a discharge pipe connected to the end of the conveying tank, a crushing bin, a storage bin, and a discharge bin connected sequentially above the conveying tank, a feeding hopper connected to the top of the crushing bin, a discharge plate connected to the bottom of both ends of the storage bin via a drive shaft, a second weighing sensor installed at the bottom of the discharge plate, the drive shaft being driven by the second servo motor, a interception mechanism at the top of the discharge bin, a discharge hopper below the interception mechanism, a first weighing sensor installed at the bottom of the discharge hopper, the discharge hopper being connected to the conveying tank via a discharge pipe, and a solenoid valve installed on the discharge pipe.

[0006] In the above scheme, a pair of crushing rollers are rotatably installed in the center of the crushing chamber, and the crushing rollers are connected to the servo motor via a three-drive system.

[0007] In the above scheme, the inner walls on both sides of the crushing chamber are provided with crushing plates. The crushing plates include wear-resistant plates that are attached to the inner walls of the crushing chamber, and crushing teeth are uniformly fixed on the wear-resistant plates near the crushing roller.

[0008] In the above scheme, pulleys are installed on both the drive shaft and the second output shaft of the servo motor, and the pulleys are connected by a belt.

[0009] In the above scheme, the interception mechanism includes an interception chamber connected to the storage silo, and the bottom end of the interception chamber is provided with an interception plate connected to the lifting assembly.

[0010] In the above scheme, the lifting assembly includes mounting plates fixed to both ends of the intercepting plate, an electric push rod with its stroke end connected to the mounting plate is installed on the inner wall of the top of the discharge bin, and a distance sensor is installed on the top of the mounting plate.

[0011] In the above scheme, the two ends of the interception plate are fixed with guide plates that are inclined to the side.

[0012] The advantages and beneficial effects of this utility model are as follows: By setting up a feeding hopper, a crushing bin, a storage bin, a weighing sensor, a discharge bin, a feeding hopper, a solenoid valve, a discharge pipe, and a conveying tank, the raw materials for biomass fuel are added to the crushing bin through the feeding hopper. After crushing, the fuel enters the storage bin as reserve fuel. Then, by rotating the feeding plate downwards, the reserve fuel is discharged from the storage bin to the feeding hopper of the discharge bin. Under the detection of the weighing sensor, when the biomass fuel in the feeding hopper reaches a set value, the solenoid valve is opened, allowing the fuel to enter the conveying tank along the discharge pipe. The feed is then conveyed forward. Compared to existing technologies, this method not only retains the function of controlling the feeding speed through the conveying tank, but also allows for more precise control of the feeding amount. This enables precise adjustment of the feeding amount and facilitates the detection of boiler combustion efficiency. By setting up a crushing roller, a crushing plate, and a servo motor, the servo motor provides power to make the crushing roller rotate towards the center simultaneously to crush the biomass fuel raw materials. In addition, the crushing plate located on the inner wall of the crushing chamber assists in crushing a small amount of raw materials fed from the inner wall, thereby fully crushing the raw materials and improving fuel utilization. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a speed-adjustable biomass boiler feeding mechanism proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure above the conveying tank of a biomass boiler feeding mechanism with adjustable speed proposed in this utility model.

[0016] In the diagram: 1. Conveying tank; 2. Servo motor 1; 3. Discharge pipe; 4. Crushing bin; 5. Storage bin; 6. Discharge bin; 7. Feeding hopper; 8. Crushing roller; 9. Crushing plate; 91. Wear-resistant plate; 92. Crushing teeth; 10. Feeding plate; 11. Drive shaft; 12. Servo motor 2; 13. Pulley; 14. Servo motor 3; 15. Retention bin; 16. Retention plate; 17. Guide plate; 18. Mounting plate; 19. Electric push rod; 20. Distance sensor; 21. Feeding hopper; 22. Weighing sensor 1; 23. Discharge pipe; 24. Solenoid valve; 25. Weighing sensor 2. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] Please see Figure 1-2 This utility model provides a technical solution: a speed-adjustable biomass boiler feeding mechanism, including a conveying tank 1 driven by a servo motor 2, a discharge pipe 3 connected to the end of the conveying tank 1, a spiral conveying shaft connected to the servo motor 2 inside the conveying tank 1, the servo motor 2 being installed at the end of the conveying tank 1, a crushing bin 4, a storage bin 5 and a discharge bin 6 being connected in sequence above the conveying tank 1, the crushing bin 4, the storage bin 5 and the discharge bin being connected by welding, a feeding hopper 7 being connected to the top of the crushing bin 4, and the bottom end of the feeding hopper 7 being connected to the crushing bin 4;

[0019] Furthermore, a pair of crushing rollers 8 are rotatably installed in the center of the crushing chamber 4, and the crushing rollers 8 are connected to the servo motor 314 for transmission.

[0020] Specifically, the crushing roller 8 is connected to the servo motor 3 14 via a transmission assembly. The transmission assembly includes pulleys 1 installed at the ends of the crushing roller 8 and on the output shaft of the servo motor 3 14 respectively. The pulleys 1 on the servo motor 3 14 are sequentially connected to the pulleys 1 on one of the crushing rollers 8 via belt 1. The pulleys 1 on two adjacent crushing rollers 8 are connected by interlaced belts 2, so that the adjacent crushing rollers 8 rotate simultaneously toward the center of the crushing chamber 4, that is, the left crushing roller 8 rotates clockwise and the right crushing roller 8 rotates counterclockwise, thereby fully crushing the raw materials output from the feeding hopper 7.

[0021] Furthermore, both sides of the inner wall of the crushing chamber 4 are provided with crushing plates 9. The crushing plates 9 include wear-resistant plates 91 that are attached to the inner wall of the crushing chamber 4. The wear-resistant plates 91 are fixed to the inner wall of the crushing chamber 4. Crushing teeth 92 are evenly fixed on the side of the wear-resistant plates 91 near the crushing roller 8.

[0022] Specifically, by setting up a crushing roller 8, a crushing plate 9, and a servo motor 14, the servo motor 14 provides power to make the crushing roller 8 rotate towards the center simultaneously to crush the biomass fuel raw materials. In addition, the crushing plate 9 located on the inner wall of the crushing chamber 4 assists in crushing the small amount of raw materials fed from the inner wall, thereby fully crushing the raw materials and improving the fuel utilization rate.

[0023] The bottom of both ends of the storage silo 5 is connected to a discharge plate 10 via a drive shaft 11, such as... Figure 2 As shown, the feeding plates 10 are arranged opposite each other. A weighing sensor 25 is installed at the bottom of the feeding plate 10. The weighing sensor 25 is used to detect the weight of the fuel carried on the feeding plate 10. The feeding plate 10 is made of steel plate and has good load-bearing capacity. The drive shaft 11 is connected to the servo motor 22 for transmission.

[0024] Furthermore, pulleys 13 are installed on both the drive shaft 11 and the output shaft of the second servo motor 12, and the pulleys 13 are connected to each other by belts. The pulleys 13 on the output shaft of the second servo motor 12 are connected to the pulleys 13 on one of the drive shafts 11 by belts connected in sequence, and the pulleys 13 on the opposite drive shafts 11 are connected by staggered belts, so that the opposite feed plates 10 can rotate downwards or upwards at the same time. That is, when the left feed plate 10 rotates clockwise, the right feed plate 10 rotates counterclockwise, so as to open the feed plate 10.

[0025] The top of the discharge bin 6 is equipped with a trapping mechanism. Due to the time difference in the signal transmission process, when the weighing sensor 22 detects that the fuel quantity has reached the set value, some fuel still moves downward into the discharge bin 6 when the discharge plate 10 is closed. In order to avoid increasing the discharge volume, the trapping mechanism is used to trap the excess discharge caused by the time difference.

[0026] Furthermore, the interception mechanism includes an interception chamber 15 connected to the storage chamber 5. The interception chamber 15 is used to intercept excess discharge. The bottom end of the interception chamber 15 is provided with an interception plate 16 connected to the lifting assembly. The interception plate 16 closes the interception chamber 15.

[0027] Furthermore, the lifting assembly includes mounting plates 18 fixed to both ends of the intercepting plate 16. An electric push rod 19 with its stroke end connected to the mounting plate 18 is installed on the inner wall of the top of the discharge bin 6. A distance sensor 20 is installed on the top of the mounting plate 18. The distance sensor 20 is used to control the extension and retraction length of the electric push rod 19. When the weighing sensor 22 detects that the fuel quantity has reached the set value, the electric push rod 19 is activated to move upward and close the intercepting bin 15, preventing fuel from continuing to fall into the discharge hopper 21.

[0028] Furthermore, the two ends of the intercepting plate 16 are fixed with guide plates 17 that are inclined to the side; the guide plates 17 are used to promote the movement of fuel downward along the guide plates 17 after it is discharged from the intercepting chamber 15, so as to avoid fuel accumulation on the intercepting plate 16.

[0029] Below the interception mechanism is a feeding hopper 21 that is fixed to the inner wall of the discharge bin 6. A weighing sensor 22 is installed at the bottom of the feeding hopper 21. The feeding hopper 21 is connected to the conveying tank 1 through the discharge pipe 23. A solenoid valve 24 is installed on the discharge pipe 23. The feeding time is controlled by the solenoid valve 24.

[0030] Specifically, by setting up a feeding hopper 7, a crushing bin 4, a storage bin 5, a weighing sensor 22, a discharge bin 6, a feeding hopper 21, a solenoid valve 24, a discharge pipe 23, and a conveying tank 1, biomass fuel raw materials are added to the crushing bin 4 through the feeding hopper 7. After crushing, the fuel enters the storage bin 5 as reserve fuel. Then, by rotating the feeding plate 10 downwards, the reserve fuel is output from the storage bin 5 to the feeding hopper 21 of the discharge bin 6. Under the detection of the weighing sensor 22, when the biomass fuel in the feeding hopper 21 reaches the set value, the solenoid valve 24 is opened, allowing the fuel to enter the conveying tank 1 along the discharge pipe 23 and then be conveyed forward. Compared with the existing technology, this not only retains the function of controlling the feeding speed through the conveying tank 1, but also further precisely controls the feeding amount, achieving the purpose of accurately adjusting the feeding amount and facilitating the detection of boiler combustion efficiency.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A speed-adjustable biomass boiler feeding mechanism, comprising a conveying tank (1) driven by a servo motor (2), characterized in that, The conveying tank (1) is connected to the end of the discharge pipe (3). The conveying tank (1) is connected in sequence to the top of the crushing chamber (4), the storage chamber (5) and the discharge chamber (6). The top of the crushing chamber (4) is connected to the feeding hopper (7). The bottom of both ends of the storage chamber (5) is connected to the discharge plate (10) through the drive shaft (11). The bottom of the discharge plate (10) is equipped with a second weighing sensor (25). The drive shaft (11) is connected to the second servo motor (12). The top of the discharge chamber (6) is provided with a interception mechanism. The discharge hopper (21) is provided below the interception mechanism. The bottom of the discharge hopper (21) is equipped with a first weighing sensor (22). The discharge hopper (21) is connected to the conveying tank (1) through the discharge pipe (23). The discharge pipe (23) is equipped with a solenoid valve (24).

2. The adjustable-speed biomass boiler feeding mechanism according to claim 1, characterized in that, A pair of crushing rollers (8) are rotatably installed in the center of the crushing chamber (4), and the crushing rollers (8) are connected to the servo motor (14) for transmission.

3. The adjustable-speed biomass boiler feeding mechanism according to claim 2, characterized in that, The inner walls on both sides of the crushing chamber (4) are provided with crushing plates (9). The crushing plates (9) include wear-resistant plates (91) that are attached to the inner wall of the crushing chamber (4). The wear-resistant plates (91) have crushing teeth (92) evenly fixed on the side near the crushing roller (8).

4. The adjustable-speed biomass boiler feeding mechanism according to claim 1, characterized in that, Both the drive shaft (11) and the output shaft of the servo motor (12) are equipped with pulleys (13), and the pulleys (13) are connected by a belt.

5. The adjustable-speed biomass boiler feeding mechanism according to claim 1, characterized in that, The interception mechanism includes an interception chamber (15) connected to the storage silo (5), and the bottom end of the interception chamber (15) is provided with an interception plate (16) connected to the lifting assembly.

6. The adjustable-speed biomass boiler feeding mechanism according to claim 5, characterized in that, The lifting assembly includes mounting plates (18) fixed to both ends of the intercepting plate (16), an electric push rod (19) with its stroke end connected to the mounting plate (18) is installed on the inner wall of the top of the discharge bin (6), and a distance sensor (20) is installed on the top of the mounting plate (18).

7. The adjustable-speed biomass boiler feeding mechanism according to claim 5, characterized in that, The intercepting plate (16) has guide plates (17) that are inclined to the side fixed at both ends.

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