Air supply device of biomass boiler

Abstract

The utility model discloses an air supply device of a biomass boiler, which comprises a centrifugal blower, the middle position of the front end face of the centrifugal blower is connected with a centrifugal blower driving rotating shaft, a rotating shaft is arranged below the centrifugal blower driving rotating shaft, and the centrifugal blower driving rotating shaft and the rotating shaft are connected in series through a synchronous chain; a first driving motor is arranged in front of the centrifugal fan driving rotating shaft, a second driving motor is arranged in front of the rotating shaft, output shafts of the first driving motor and the second driving motor are connected with square rotating shafts through couplings, and connecting rods are arranged on the outer sides of the square rotating shafts. The centrifugal blower has the advantages that the centrifugal blower can be driven by the first driving motor and the second driving motor to work, and when equipment needs to be used, the two driving motors are alternately used, so that the situation that the single driving motor runs for a long time and is overheated can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air supply, in particular to an air supply device for a biomass boiler. Background Technique

[0002] A biomass boiler is a boiler that uses biomass energy as fuel, including types such as biomass steam boilers, biomass hot water boilers, and biomass hot blast stoves. The biggest feature of biomass boilers is energy conservation, environmental protection, and convenient installation and use. Biomass fuels usually include agricultural wastes such as straw, rice straw, firewood, wood chips, peanut shells, melon seed shells, beet pulp, and tree bark. These fuels are processed into granular form and can be used for the combustion of biomass boilers;

[0003] When using a biomass boiler, a centrifugal fan is generally used to continuously supply external air into the biomass boiler. They ensure sufficient oxygen supply during the boiler combustion process to achieve complete combustion, improve combustion efficiency, reduce unburned fuel and emissions. And such a centrifugal fan used for air supply operation for a biomass boiler can be called an air supply device for a biomass boiler.

[0004] However, when using the air supply device of a centrifugal fan type biomass boiler, since this centrifugal fan is installed around the biomass boiler, the temperature of its surrounding environment is relatively high. When the motor used to drive the centrifugal fan works in this environment for a long time, it may cause overheating of itself, resulting in a decline or damage to its performance; Therefore, it does not meet the existing requirements, and for this reason, we propose an air supply device for a biomass boiler. Content of the Utility Model

[0005] The purpose of the utility model is to provide an air supply device for a biomass boiler to solve the problems raised in the above background technique that when using the air supply device of a centrifugal fan type biomass boiler, since this centrifugal fan is installed around the biomass boiler, the temperature of its surrounding environment is relatively high. When the motor used to drive the centrifugal fan works in this environment for a long time, it may cause overheating of itself, resulting in a decline or damage to its performance, etc.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an air supply device for a biomass boiler, including a centrifugal blower. The middle position of the front end face of the centrifugal blower is connected with a centrifugal fan drive rotating shaft. A rotating shaft is arranged below the centrifugal fan drive rotating shaft, and the centrifugal fan drive rotating shaft and the rotating shaft are connected in series through a synchronous chain;

[0007] A first driving motor is provided in front of the driving shaft of the centrifugal fan. A second driving motor is provided in front of the rotating shaft. The output shafts of the first driving motor and the second driving motor are both connected with a square rotating shaft through couplings. A connecting rod is provided outside the square rotating shaft. A square slot is provided at the middle position of the front end face of the connecting rod, and the square rotating shaft is inserted into the inside of the square slot.

[0008] Preferably, a single-rod cylinder fixedly installed inside the housing of the centrifugal blower is provided on one side of the connecting rod. The piston rod of the single-rod cylinder is connected with a pushing block, and one end of the pushing block is connected with a roller bearing sleeve sleeved on the outer surface of the connecting rod through a roller bearing.

[0009] A first connecting head is fixedly provided at the middle position of the rear end face of the connecting rod. A second connecting head is provided behind the first connecting head. A circle of arc-shaped pointed teeth is fixedly provided on the surface of the first connecting head facing the second connecting head and the surface of the second connecting head facing the first connecting head. The first connecting head and the second connecting head are connected by the arc-shaped pointed teeth, and the two second connecting heads are respectively fixed to the driving shaft of the centrifugal fan and the rotating shaft.

[0010] Preferably, the inner wall cross-sectional shape of the square slot is square. The outer surface of the square rotating shaft fits with the inner wall of the square slot, and the square rotating shaft is slidably connected with the square slot.

[0011] Preferably, the top end of the arc-shaped pointed tooth is arc-shaped, and the number and positions of the arc-shaped pointed teeth on the outer surfaces of the first connecting head and the second connecting head correspond to each other.

[0012] Preferably, the rear end of the rotating shaft is located inside the housing of the centrifugal blower, and the rotating shaft located inside the housing of the centrifugal blower is connected with the centrifugal blower through a roller bearing.

[0013] Preferably, a centrifugal air supply mechanism is provided inside the centrifugal blower, and the driving shaft of the centrifugal fan is connected with the centrifugal air supply mechanism.

[0014] Preferably, a probe-type temperature sensor is fixedly installed on one side of the upper end faces of the first driving motor and the second driving motor, and the first driving motor and the second driving motor are fixed to the probe-type temperature sensor through screws.

[0015] Preferably, an arc-shaped metal cover plate located on the outer surface of the centrifugal blower is provided above the first single-rod cylinder counted from top to bottom, and the centrifugal blower and the arc-shaped metal cover plate are fixed through screws.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] 1. In the present utility model, both the first driving motor and the second driving motor can drive the rotating shaft of the centrifugal fan to rotate, thereby driving the centrifugal air supply mechanism inside the centrifugal air blower to operate. When the device needs to be used, first start the first driving motor. Whenever the first driving motor works for a period of time, turn off the first driving motor and use the second driving motor to drive the rotating shaft of the centrifugal fan to continue rotating. Through the above technical solution, it is possible to prevent the situation that a single driving motor runs for too long and causes its own overheating, and the first driving motor and the second driving motor can be used as backups for each other. When one driving motor fails, the other driving motor can immediately take over to prevent the centrifugal air blower from interrupting its operation;

[0018] 2. In the present utility model, two single-bar cylinders can be used to disconnect the connections between the first driving motor and the second driving motor and the rotating shaft of the centrifugal fan respectively. When the rotating shaft of the centrifugal fan is driven by the first driving motor to rotate, the connection between the second driving motor and the rotating shaft of the centrifugal fan is disconnected through the corresponding single-bar cylinder. Through the above technical solution, it is possible to prevent the situation that when one driving motor is in operation, but due to the other driving motor still being connected to the rotating shaft of the centrifugal fan, the rotating shaft of the centrifugal fan drives the bearings and couplings on the driving motor in the shutdown state to rotate together, resulting in continuous wear and affecting its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0020] Figure 2 is a front view of the internal structure of the present utility model;

[0021] Figure 3 is of the present utility model Figure 2 is an enlarged structural view of part A in the present utility model;

[0022] Figure 4 is of the present utility model Figure 3 is an enlarged structural view of part B in the present utility model.

[0023] In the figure: 1. Centrifugal air blower; 2. Rotating shaft of centrifugal fan; 3. Rotating shaft; 4. Synchronous chain; 5. First driving motor; 6. Second driving motor; 7. Square rotating shaft; 8. First connecting head; 9. Arc-shaped pointed tooth head; 10. Connecting rod; 11. Square slot; 12. Second connecting head; 13. Roller bearing sleeve; 14. Pushing block; 15. Single-bar cylinder; 16. Probe-type temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] The centrifugal blower 1 (model 4-72), the first drive motor 5 (model AQMD2410NS), and the single-bar cylinder 15 (model SWMB) mentioned in the present utility model can be purchased from the market or customized privately.

[0026] As Figure 1 and Figure 3 As shown, an embodiment provided by the present utility model: an air supply device for a biomass boiler, including a centrifugal blower 1. A centrifugal fan drive shaft 2 is connected to the middle position of the front end face of the centrifugal blower 1. A shaft 3 is provided below the centrifugal fan drive shaft 2, and the centrifugal fan drive shaft 2 and the shaft 3 are connected in series by a synchronous chain 4.

[0027] A first drive motor 5 is provided in front of the centrifugal fan drive shaft 2, and a second drive motor 6 is provided in front of the shaft 3. The output shafts of the first drive motor 5 and the second drive motor 6 are both connected to a square shaft 7 through couplings. A connecting rod 10 is provided outside the square shaft 7. A square slot 11 is provided in the middle position of the front end face of the connecting rod 10, and the square shaft 7 is inserted into the inside of the square slot 11.

[0028] One side of the connecting rod 10 is provided with a single-bar cylinder 15 fixedly installed inside the housing of the centrifugal blower 1. The piston rod of the single-bar cylinder 15 is connected to a pushing block 14, and one end of the pushing block 14 is connected to a roller bearing sleeve 13 sleeved on the outer surface of the connecting rod 10 through a roller bearing.

[0029] A first connection head 8 is fixedly provided in the middle position of the rear end face of the connecting rod 10. A second connection head 12 is provided behind the first connection head 8. A circle of arc-shaped pointed teeth 9 is fixedly provided on the surface of the first connection head 8 facing the second connection head 12 and the surface of the second connection head 12 facing the first connection head 8. The first connection head 8 and the second connection head 12 are connected by the arc-shaped pointed teeth 9, and the two second connection heads 12 are respectively fixed to the centrifugal fan drive shaft 2 and the shaft 3.

[0030] As a preferred technical solution of this embodiment, as Figure 3 and Figure 4As shown in the figure, the inner wall cross-sectional shape of the square slot 11 is square. The outer surface of the square rotating shaft 7 fits with the inner wall of the square slot 11, and the square rotating shaft 7 is slidably connected to the square slot 11. When the device needs to be used, first start the first driving motor 5. The first driving motor 5 can drive the connected square rotating shaft 7 to rotate. Since the square rotating shaft 7 fits with the inner wall of the square slot 11 on the front end face of the connecting rod 10, when the square rotating shaft 7 rotates, the connecting rod 10 will rotate along with it. When the connecting rod 10 rotates, the first connecting head 8 fixed thereto and the second connecting head 12 connected to the first connecting head 8 through the arc-shaped pointed tooth head 9 will rotate synchronously.

[0031] The centrifugal air blower 1 is internally provided with a centrifugal air supply mechanism, and the centrifugal fan driving shaft 2 is connected to the centrifugal air supply mechanism. The rotating second connecting head 12 can drive the centrifugal fan driving shaft 2 fixed thereto to rotate. The rotating centrifugal fan driving shaft 2 can drive the centrifugal air supply mechanism inside the centrifugal air blower 1 to operate.

[0032] After the first driving motor 5 has run for a period of time, turn off the first driving motor 5 and start the second driving motor 6. The second driving motor 6 can drive the rotating shaft 3 to rotate through the same transmission mechanism. When the rotating shaft 3 rotates, the centrifugal fan driving shaft 2 connected in series with the rotating shaft 3 through the synchronous chain 4 will rotate accordingly, so as to complete the alternate use of the driving motors. This embodiment can prevent the situation that a single driving motor runs for too long and causes its own overheating, and the two first driving motors 5 and the second driving motor 6 can be used as backups for each other. When one driving motor fails, the other driving motor can immediately take over to prevent the centrifugal air blower 1 from interrupting its work.

[0033] As a preferred technical solution of this embodiment, as Figure 4As shown, the top end of the arc-shaped pointed tooth head 9 is arc-shaped, and the number and position of the arc-shaped pointed tooth heads 9 located on the outer surfaces of the first connector 8 and the second connector 12 correspond to each other; when starting the second drive motor 6 by closing the first drive motor 5, it is necessary to simultaneously start the single-rod cylinder 15 corresponding to the first drive motor 5. Through this single-rod cylinder 15, the push block 14 connected thereto can be pushed forward. As the push block 14 moves, the roller bearing sleeve 13 fixed thereto and the connecting rod 10 connected to the roller bearing sleeve 13 through a roller bearing will move together until the connection between the arc-shaped pointed tooth head 9 on the first connector 8 fixed to the rear end surface of the connecting rod 10 and the arc-shaped pointed tooth head 9 on the second connector 12 fixed to the front end surface of the centrifugal fan drive shaft 2 is disconnected. Through the above technical solution, it is possible to prevent the situation where when one of the drive motors is in the working state but because the other drive motor is still connected to the centrifugal fan drive shaft 2, the rotating centrifugal fan drive shaft 2 drives the bearings and couplings on the drive motor in the shutdown state to rotate together, causing continuous wear and affecting its service life.

[0034] On one side of the upper end surfaces of the first drive motor 5 and the second drive motor 6, a probe-type temperature sensor 16 is fixedly installed, and the first drive motor 5 and the second drive motor 6 are fixed to the probe-type temperature sensor 16 through screws; through the two probe-type temperature sensors 16, the working time of the first drive motor 5 and the second drive motor 6 can be monitored in real time. Whenever the first drive motor 5 or the second drive motor 6 is about to reach the dangerous temperature, the other drive motor is started. The running time of each drive motor needs to be set according to the value on the probe-type temperature sensor 16;

[0035] When it is necessary to start the first drive motor 5 again, the single-rod cylinder 15 corresponding to the second drive motor 6 is used to disconnect the connection between the centrifugal fan drive shaft 2 and the second drive motor 6. Then, through the single-rod cylinder 15 corresponding to the first drive motor 5, the first connector 8 is pushed toward the centrifugal fan drive shaft 2. As the first connector 8 moves, a circle of arc-shaped pointed tooth heads 9 fixed to the rear end surface of the first connector 8 will mesh with a circle of arc-shaped pointed tooth heads 9 located on the front end surface of the second connector 12 again, so as to connect the first drive motor 5 and the centrifugal fan drive shaft 2. And because the top ends of the tooth heads on the arc-shaped pointed tooth head 9 are all arc-shaped, even when the tooth heads on the arc-shaped pointed tooth heads 9 on both sides directly collide, they will cross each other because of the arc surface. Through the above technology, it is possible to prevent the situation where the arc-shaped pointed tooth heads 9 on both sides collide and cause the first connector 8 and the second connector 12 to be unable to be connected.

[0036] The rear end of the rotating shaft 3 is located inside the housing of the centrifugal blower 1, and the rotating shaft 3 located inside the housing of the centrifugal blower 1 is connected to the centrifugal blower 1 through a roller bearing; the roller bearing structure here can support the rotating shaft 3 and prevent it from being misaligned.

[0037] Above the first single-bar cylinder 15 counted from top to bottom, there is an arc-shaped metal cover plate located on the outer surface of the centrifugal blower 1, and the centrifugal blower 1 and the arc-shaped metal cover plate are fixed by screws; the arc-shaped metal cover plate can protect the connection structure between the first drive motor 5 and the second drive motor 6 and the centrifugal fan drive shaft 2, and when the connection structure fails, the arc-shaped metal cover plate can be removed for maintenance.

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A air supply device for a biomass boiler, comprising a centrifugal blower (1), characterized in that: At the middle position of the front end face of the centrifugal blower (1), a centrifugal blower drive rotating shaft (2) is connected. Below the centrifugal blower drive rotating shaft (2), there is a rotating shaft (3), and the centrifugal blower drive rotating shaft (2) and the rotating shaft (3) are connected in series by a synchronous chain (4). In front of the centrifugal blower drive rotating shaft (2), there is a first drive motor (5). In front of the rotating shaft (3), there is a second drive motor (6). The output shafts of the first drive motor (5) and the second drive motor (6) are both connected with a square rotating shaft (7) through couplings. Outside the square rotating shaft (7), there is a connecting rod (10). At the middle position of the front end face of the connecting rod (10), there is a square slot (11), and the square rotating shaft (7) is inserted into the inside of the square slot (11).

2. The air supply device of a biomass boiler according to claim 1, characterized in that: On one side of the connecting rod (10), there is a single-rod cylinder (15) fixedly installed inside the housing of the centrifugal blower (1). The piston rod of the single-rod cylinder (15) is connected with a pushing block (14), and one end of the pushing block (14) is connected with a roller bearing sleeve (13) sleeved on the outer surface of the connecting rod (10) through a roller bearing. At the middle position of the rear end face of the connecting rod (10), a first connecting head (8) is fixedly provided. Behind the first connecting head (8), there is a second connecting head (12). On the surface of the first connecting head (8) facing the second connecting head (12) and on the surface of the second connecting head (12) facing the first connecting head (8), a circle of arc-shaped pointed teeth (9) are fixedly provided. The first connecting head (8) and the second connecting head (12) are connected by the arc-shaped pointed teeth (9), and the two second connecting heads (12) are respectively fixed to the centrifugal blower drive rotating shaft (2) and the rotating shaft (3).

3. The air supply device of a biomass boiler according to claim 1, characterized in that: The cross-sectional shape of the inner wall of the square slot (11) is square. The outer surface of the square rotating shaft (7) fits with the inner wall of the square slot (11), and the square rotating shaft (7) is slidably connected with the square slot (11).

4. The air supply device of a biomass boiler according to claim 2, characterized in that: The top end of the arc-shaped pointed teeth (9) is arc-shaped, and the number and positions of the arc-shaped pointed teeth (9) on the outer surfaces of the first connecting head (8) and the second connecting head (12) correspond to each other.

5. The air supply device of a biomass boiler according to claim 1, characterized in that: The rear end of the rotating shaft (3) is located inside the housing of the centrifugal blower (1), and the rotating shaft (3) located inside the housing of the centrifugal blower (1) is connected with the centrifugal blower (1) through a roller bearing.

6. The air supply device of a biomass boiler according to claim 1, characterized in that: Inside the centrifugal blower (1), there is a centrifugal air supply mechanism, and the centrifugal blower drive rotating shaft (2) is connected with the centrifugal air supply mechanism.

7. The air supply device of a biomass boiler according to claim 1, characterized in that: On one side of the upper end faces of the first drive motor (5) and the second drive motor (6), a probe-type temperature sensor (16) is fixedly installed, and the first drive motor (5) and the second drive motor (6) are fixed to the probe-type temperature sensor (16) through screws.

8. The air supply device of a biomass boiler according to claim 2, characterized in that: Above the first single-rod cylinder (15) counted from top to bottom, there is an arc-shaped metal cover plate on the outer surface of the centrifugal blower (1), and the centrifugal blower (1) and the arc-shaped metal cover plate are fixed through screws.

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