Environment-friendly device for automatic discharging and automatic feeding of biomass boiler

Abstract

The utility model relates to the field of biomass boilers, in particular to an environment-friendly device for automatic discharging and automatic feeding of a biomass boiler, which comprises a PLC (programmable logic controller) module and a first conveying belt, a closed hood is arranged at one end of the first conveying belt and is of a closed structure, and a closed door is arranged at the joint of one side in the closed hood and the first conveying belt. An automatic discharging device is arranged at the position, located at one end of the first conveying belt, in the closed cover, a main hopper is arranged below the automatic discharging device, at least two branch hoppers are arranged below the main hopper, the main hopper and the branch hoppers are all arranged in the closed cover, and the automatic discharging device comprises a rotating frame and a supporting frame which is arranged on the conveying belt. The rotating frame is rotationally connected with the supporting frame through a rotating frame rotating shaft, a lifting frame is arranged on the rotating frame, at least one lifting rod is arranged below the lifting frame, and each lifting rod is movably connected with the rotating frame. According to the utility model, biomass materials are added into the main hopper in a closed structure, so that the problems of dust raising, biomass scattering and the like during feeding are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of biomass boilers, in particular to an environmentally friendly device for automatic unloading and automatic feeding of biomass boilers. Background Art

[0002] In the production process, biomass boilers are a common way to obtain heat energy. Most factories are equipped with multiple boilers. Conventional methods of adding biomass to boilers involve manually disassembling ton bags. The unloading and loading processes are open. Because there is a lot of dust in biomass and the particles are small, dust and biomass scattering often occur, which not only affects the environment, but also causes harm to the health of the workers who dismantle the materials. Scattered biomass also causes waste of resources. In the existing technology, dismantling workers often wear protective masks and dust-proof clothing to prevent dust. The temperature in the boiler workshop is usually high, and workers are prone to heat stroke. Therefore, there is an urgent need for an environmentally friendly device for automatic unloading and automatic loading of biomass boilers to reduce the dust problem and biomass scattering problem when adding biomass in the boiler workshop, protecting the environment while reducing material loss. Utility Model Content

[0003] In view of the deficiencies in the background technology, the utility model provides an environmentally friendly device for automatic unloading and automatic feeding of a biomass boiler, which effectively reduces dust in a boiler workshop and reduces the scattering of biomass materials.

[0004] An environmentally friendly device for automatic unloading and automatic feeding of biomass boilers, characterized in that it includes a PLC module and a first conveyor belt, a closed cover is provided at one end of the first conveyor belt, the closed cover is a sealed structure, a closed door is provided at the connection between one side of the closed cover and the first conveyor belt, an automatic unloading device is provided at one end of the first conveyor belt in the closed cover, a total hopper is provided below the automatic unloading device, at least two sub-hoppers are provided below the total hopper, the total hopper and the sub-hoppers are both inside the closed cover, the automatic unloading device includes a support frame and a rotating frame, the support frame is provided on the conveyor belt, the rotating frame is rotatably connected to the support frame via a rotating frame rotating shaft, a lifting frame is provided on the rotating frame, at least one lifting rod is provided below the lifting frame, and each lifting rod is movably connected to the rotating frame.

[0005] Preferably, a third photoelectric sensor is provided on the first conveyor belt, and both the first conveyor belt and the third photoelectric sensor are electrically connected to the PLC module.

[0006] Preferably, each of the lifting rods is provided with an external thread, and a threaded hole matching the lifting rod is provided on the rotating frame, and each of the lifting rods passes through the threaded hole matching the lifting rod and is threadedly connected to the rotating frame.

[0007] Preferably, the upper end of each lifting rod is fixedly connected to a pulley, the lifting frame is provided with a lifting rod drive motor, the lifting rod drive motor is connected to a belt, the lifting rod drive motor is connected to the pulley through the belt, and the lifting rod drive motor is connected to the PLC module.

[0008] Preferably, at least one of the pulleys is provided with a rotary encoder, and the rotary encoder is electrically connected to the PLC module.

[0009] Preferably, a compressed air solenoid valve is provided on the lifting frame, an air pipe is provided inside each lifting rod, each air pipe is connected to the compressed air solenoid valve, the compressed air solenoid valve and the PLC module are electrically connected, and the compressed air solenoid valve is connected to a compressed air intake pipe.

[0010] Preferably, the rotating frame shaft includes a driving shaft and a driven shaft, and the driving shaft and the driven shaft are symmetrically arranged on both sides of the rotating frame. The driving shaft is connected to a shaft driving motor, and the shaft driving motor is electrically connected to the PLC module.

[0011] Preferably, a discharge port is provided at the lower end of the main hopper, a discharge solenoid valve is provided at the discharge port, and the discharge solenoid valve is electrically connected to the PLC module.

[0012] Preferably, a second conveyor belt is provided above the side of each of the sub-hoppers close to the main hopper, and one end of the second conveyor belt closest to the main hopper is provided below the main hopper. A switching mechanism is provided between every two of the second conveyor belts, and the switching mechanism includes a first cylinder fixedly connected to the closing cover and a sub-plate rotatably connected to the closing cover, one end of the sub-plate is connected to the cylinder, and a rotatable shaft is provided in the middle of the sub-plate, and the sub-plate is rotatably connected to the closing cover through the rotatable shaft.

[0013] Preferably, each of the material distribution hoppers is provided with a material guiding structure, the material guiding structure includes an active rod and four driven rods, the closing cover is fixedly connected to a fixing mechanism, one end of the active rod is fixedly connected to the fixing mechanism and the other end is connected to a second cylinder, the lower end of the second cylinder is connected to a connecting block, the upper ends of the four driven rods are rotatably connected to the fixing mechanism, the lower ends of the four driven rods are respectively connected to the connecting blocks through connecting rods, and the two ends of the connecting rod are respectively rotatably connected to the connecting block and the driven rod.

[0014] Beneficial effects

[0015] The utility model adds biomass into the main hopper in a closed structure, distributes biomass from the main hopper to each sub-hopper in the closed structure, and through the cooperation of the rotating frame, the lifting frame and the air pipe, the material in the biomass bag is dumped and the bag is purged, which effectively reduces dust in the boiler workshop and reduces the scattering of biomass, thereby protecting the environment and reducing material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a side view of the automatic unloading device in the utility model;

[0018] Figure 3 This is a top view of the lifting frame in the utility model;

[0019] Figure 4 This is a top view of the rotating frame of the present invention;

[0020] Figure 5 This is a diagram of the first use state of the switching device in the present invention;

[0021] Figure 6 This is a diagram of the second use state of the switching device in the present invention;

[0022] Figure 7 This is a diagram of the first use state of the material guiding device in the utility model;

[0023] Figure 8 This is a diagram of the second use state of the material guiding device in the present utility model;

[0024] 1. First conveyor belt, 2. Enclosure cover, 3. Enclosure door, 4. Support frame, 5. Rotating frame, 501. Driven shaft, 502. Driving shaft, 503. Driving chain, 504. Shaft drive motor, 505. Threaded hole, 6. Lifting frame, 601. Lifting rod drive motor, 602. Compressed air solenoid valve, 603. Air pipe, 604. Lifting rod, 605. Rotary encoder, 606. Tensioner, 60 7. Belt, 608. Pulley, 7. Main hopper, 701. Discharge solenoid valve, 8. Material guide structure, 801. Active rod, 802. Driven rod, 803. Second cylinder, 804. Connecting block, 805. Fixing mechanism, 806. Connecting rod, 9. Switching mechanism, 901. Divider plate, 902. First cylinder, 903. Cylinder base, 904. Rotatable shaft, 10. Divider hopper, 11. Second conveyor belt. 12. Baffle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In this utility model, unless otherwise specified or limited, the terms "disposed," "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed or detachable connections, mechanical connections, direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0028] like Figure 1-8 As shown, an environmentally friendly device for automatic unloading and automatic feeding of a biomass boiler includes a PLC module (not shown) and a first conveyor belt 1. A closed cover 2 is provided at one end of the first conveyor belt. An automatic unloading device is provided at the connection between the closed cover and the first conveyor belt. A main hopper 7 is provided below the automatic unloading device. At least two sub-hoppers 10 are provided below the main hopper. In this embodiment, there are four sub-hoppers, and both the main hopper and the sub-hopper are within the closed cover. The automatic unloading device includes a turret 5 and a support frame 4. The support frame is provided on the first conveyor belt and is rotatably connected to the support frame via a rotating shaft. The turret is provided with a lifting frame 6. At least one lifting rod 604 is provided below the lifting frame. In this embodiment, there are four lifting rods, which are distributed at the four corners of the lifting frame and are each movably connected to the turret. Each lifting rod has an external thread, and the turret has a threaded hole 505 that matches the lifting rod. Each lifting rod is movably connected to the turret through the matching threaded hole. A pulley 608 is fixedly connected to the upper end of each lifting rod. A lifting rod drive motor 601 is mounted on the lifting frame. The lifting rod drive motor is connected to a belt 607, which is then connected to the pulleys via the belt. The lifting rod drive motor is also connected to the PLC module. A rotary encoder 605 is mounted on the pulleys, which is electrically connected to the PLC module. The enclosure, located above the first conveyor belt, is equipped with a closed door 3. This electrically powered door is electrically connected to the PLC module, which controls its opening and closing.

[0029] A first photoelectric sensor is provided on the first conveyor belt, and the first photoelectric sensor is electrically connected to the PLC module. The first photoelectric sensor is used to monitor whether there are biomass bags on the first conveyor belt. When a biomass bag is detected on the first conveyor belt, the first photoelectric sensor transmits an electrical signal to the PLC module. The PLC module controls the operation of the automatic unloading device to unload the biomass bag. When the first conveyor belt conveys the biomass bag, the closed door opens, and the biomass bag enters the support frame in the closed cover. The biomass bag is a ton bag with an open top, and the lifting rod on the lifting frame drives the motor to start The pulley rotates through the cooperation of the belt and the tensioning pulley, and the rotation of the pulley drives the lifting rod to move up and down in the threaded hole in the rotating frame. The lifting rod moves downward in the threaded hole until the lower end of the lifting rod is inserted into the biomass material bag to a certain depth. A rotary encoder is provided on the pulley connected to the upper end of the lifting rod. The number of rotations has been preset in the rotary encoder. The lifting rod rotates the preset number of circles to insert the lifting rod into the biomass material bag. By controlling the preset number of circles in the rotary encoder, the number of circles of rotation of the pulley can be controlled, thereby controlling the depth to which the lower end of the lifting rod is inserted into the biomass material bag.

[0030] The rotating frame shaft includes a driving shaft 501 and a driven shaft 502, which are symmetrically arranged on both sides of the rotating frame. The driving shaft and the driven shaft are rotatably connected to the support frame. The driving shaft and the driven shaft pass through the support frame and can rotate on the support frame. The driving shaft is connected to the rotating frame shaft driving motor 504, and the driving motor is connected to the driving shaft through the driving chain 503. The rotating frame shaft driving motor is electrically connected to the PLC module. A compressed air solenoid valve 602 is provided on the lifting frame, and an air pipe 601 is provided inside each lifting rod. Each air pipe passes through the lifting rod and is arranged inside the lifting rod. The outlet of each air pipe is flush with the end of the lower end of the lifting rod. The upper end of each air pipe is connected to the compressed air solenoid valve. The compressed air solenoid valve and the PLC module are electrically connected. The compressed air solenoid valve is connected to a compressed air intake pipe (not shown in the figure). After the lifting rod is inserted into the biomass bag to a certain depth, the rotating shaft drive motor runs, and the rotating shaft drive motor drives the rotating frame to rotate 180 degrees through the drive chain. The rotation of the rotating frame drives the lifting frame to rotate 180 degrees together. The lifting rod on the lifting frame drives the biomass bag to rotate 180 degrees together. During the rotation of the biomass bag, biomass flows out of the biomass bag. After flipping, the compressed air solenoid valve opens, and the compressed air is transported to the trachea outlet through the trachea, and the biomass bag is purged through the trachea outlet to clean the biomass in the biomass bag. After purging, the rotating frame rotates to drive the lifting frame to rotate 180 degrees again, and the lifting rod drive motor reverses to drive the lifting rod to move upward. The empty biomass bag falls on the first conveyor belt, the closed door is opened, the first conveyor belt reverses, and the empty biomass bag is transported to the loading point. The operator removes the biomass bag to complete the feeding of the main hopper. A discharge port is provided at the lower end of the main hopper, and a discharge solenoid valve 701 is provided at the discharge port. The discharge solenoid valve is electrically connected to the PLC module. The switch of the discharge solenoid valve can be controlled by the PLC module to feed the sub-hopper according to different production conditions.

[0031] This device includes multiple second conveyor belts 11, a second conveyor belt is provided between every two sub-hoppers, and a second conveyor belt is also provided between the main hopper and the sub-hopper close to the main hopper. A baffle 12 is provided at one end of the second conveyor belt close to the main hopper. The baffle can block all the biomass on the second conveyor belt to ensure the subsequent transportation of biomass materials. A switching mechanism 9 is provided between every two second conveyor belts. The switching mechanism includes a first cylinder 902 fixedly connected to the closing cover and a dividing plate 901 rotatably connected to the closing cover. At least one cylinder base 903 is fixedly connected to the closing cover. The first cylinder is provided on a cylinder base matched therewith. The dividing plate is welded by two iron plates. A rotatable shaft is provided in the middle of the dividing plate. The two iron plates clamp the rotatable shaft in the middle. The dividing plate is rotatably connected to the closing cover through the rotatable shaft.

[0032] The switching mechanism is divided into a feeding state and a dividing state. In the feeding state, the first cylinder contracts, and a gap is formed between the dividing piece and the previous second conveyor belt. The biomass can pass through the gap into the dividing hopper before the switching mechanism. In the dividing state, the first cylinder is opened, and there is no gap between the two second conveyor belts. The biomass is transported to the top of the next dividing hopper through the cooperation of the two conveyor belts.

[0033] A material guiding structure 8 is provided in each material distribution hopper, and a fixed cross bar is provided in each material distribution hopper. The material guiding structure is fixedly connected to the cross bar. The material guiding structure includes an active rod 801 and four driven rods 802. A fixing mechanism 805 is fixedly connected to the closing cover. The upper end of the active rod is fixedly connected to the fixing block and the lower end is connected to the second cylinder 803. The lower end of the second cylinder is connected to the connecting block 804. The four driven rods are connected to the connecting block through connecting rods 806. The upper ends of the four driven rods are rotatably connected to the fixing mechanism, and the lower ends of the four driven rods are respectively connected to the connecting block through connecting rods. The connection method between the two ends of each connecting rod and the connecting block and the driven rod is a rotating connection. Small holes are provided at both ends of the connecting rod, and the side of the connecting block and the lower end of the driven rod are provided with matching holes that match the small holes. A matching rotating shaft passes through the small hole and the matching hole, and rotation is achieved through the cooperation of the small hole, the matching hole and the rotating shaft. The bottom of each hopper is connected to the combustion chamber of the biomass boiler. A switch valve is provided under the hopper. The switch valve is electrically connected to the PLC module. By controlling the opening and closing of the switch valve, the feeding into the combustion chamber of the boiler is completed.

[0034] The first cylinder is equipped with a first valve, and the second cylinder is equipped with a second valve. Both the first and second valves are connected to a PLC module. The PLC module controls the opening and closing of the first and second valves, thereby controlling the extension and retraction of the first and second cylinders. A second photoelectric sensor (not shown) is installed in the main hopper, and a third photoelectric sensor (not shown) is installed in each sub-hopper. Both the second and third photoelectric sensors are electrically connected to the PLC module. The second photoelectric sensor monitors the level of biomass material in the main hopper to determine whether biomass material needs to be added to the main hopper. The third photoelectric sensor monitors the level of biomass material in the sub-hopper to determine which sub-hopper requires biomass material. When biomass material needs to be added to one of the sub-hoppers, a switching device above the sub-hopper switches to the material addition state, opening the discharge solenoid valve at the bottom of the main hopper and cooperating with the multiple second conveyor belts to add biomass material to the sub-hopper. The PLC control system in this device uses Siemens PLC S7-1500, and the rotary encoder model is RI41-E0 / 1000ER.11KB.

[0035] How it works

[0036] The biomass bag is placed on the first conveyor belt. The biomass bag is a ton bag. After the first photoelectric sensor detects the biomass bag, the first conveyor belt is started. The first conveyor belt transports the biomass bag to the bottom of the automatic unloading device. The lifting rod drive motor drives the four lifting rods to descend. The lifting rods are inserted into the ton bag. The lifting rods rotate according to the set value in the rotary encoder. After the lifting rods are inserted into the ton bag at a fixed depth, the rotating frame shaft drive motor is started to drive the rotating frame to rotate 180 degrees. The rotation of the rotating frame drives the ton bag to flip over. After the ton bag flips over, the biomass flows out of the ton bag. After the biomass flows out, the compressed air solenoid valve is opened, and the ton bag is purged by the air pipe inside the lifting rod. After the ton bag is purged clean, the rotating frame rotates 180 degrees again, the lifting rod rises, and the ton bag falls on the first conveyor belt. The first conveyor belt reverses to transport the empty ton bag out of the closed cover. The operator removes the empty ton bag, and the biomass is transported by the ton bag. The bag flows directly into the main hopper, which is equipped with a second photoelectric sensor. When the biomass material in the main hopper is insufficient, the second photoelectric sensor can transmit an electrical signal to the PLC module, thereby reminding the operator to add material to the main hopper. The feeding solenoid valve below the main hopper opens, and the biomass falls onto the second conveyor belt below. The second conveyor belt transports the biomass to the sub-hopper. After the third photoelectric sensor in the sub-hopper detects that there is enough biomass material, it transmits an electrical signal to the PLC control module. After receiving the signal, the switching mechanism above the sub-hopper is switched to the sub-hopper state, and the biomass cannot fall into this hopper. The biomass slides down from the switching mechanism to the next second conveyor belt, and is transported to the next sub-hopper by the next second conveyor belt. The material guiding mechanism in each sub-hopper is opened when adding material to the sub-hopper to prevent the biomass from piling up too high, which is convenient for subsequent adding material to the sub-hopper.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

Claims

1. An environmentally friendly device for automatic unloading and automatic charging of biomass boilers, characterized by: It includes a PLC module and a first conveyor belt, a closed cover is provided at one end of the first conveyor belt, the closed cover is a closed structure, a closed door is provided at the connection between one side of the closed cover and the first conveyor belt, an automatic unloading device is provided in the closed cover at one end of the first conveyor belt, a main hopper is provided below the automatic unloading device, at least two sub-hoppers are provided below the main hopper, the main hopper and the sub-hoppers are both in the closed cover, and the automatic unloading device includes a support frame and a rotating frame, the support frame is provided on the conveyor belt, the rotating frame is rotatably connected to the support frame through a rotating frame rotating shaft, a lifting frame is provided on the rotating frame, at least one lifting rod is provided below the lifting frame, and each lifting rod is movably connected to the rotating frame.

2. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: A first photoelectric sensor is provided on the first conveyor belt, and both the first conveyor belt and the first photoelectric sensor are electrically connected to the PLC module.

3. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: Each of the lifting rods is provided with an external thread, and the rotating frame is provided with a threaded hole matched with the lifting rod. Each of the lifting rods passes through the threaded hole matched with the lifting rod and is threadedly connected to the rotating frame.

4. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 3, characterized in that: The upper end of each lifting rod is fixedly connected to a pulley, and the lifting frame is provided with a lifting rod drive motor, which is connected to a belt. The lifting rod drive motor is connected to the pulley through the belt, and the lifting rod drive motor is connected to the PLC module.

5. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 4, characterized in that: At least one of the pulleys is provided with a rotary encoder, and the rotary encoder is electrically connected to the PLC module.

6. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: The lifting frame is provided with a compressed air solenoid valve, and each lifting rod is provided with an air pipe inside. Each air pipe is connected to the compressed air solenoid valve. The compressed air solenoid valve is electrically connected to the PLC module, and the compressed air solenoid valve is connected to the compressed air intake pipe.

7. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: The rotating frame shaft includes a driving shaft and a driven shaft, which are symmetrically arranged on both sides of the rotating frame. The driving shaft is connected to a shaft driving motor, and the shaft driving motor is electrically connected to a PLC module.

8. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: A discharge port is provided at the lower end of the main hopper, and a discharge solenoid valve is provided at the discharge port. The discharge solenoid valve is electrically connected to the PLC module.

9. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: A second conveyor belt is provided above the side of each sub-hopper close to the main hopper, and one end of the second conveyor belt closest to the main hopper is provided below the main hopper. A switching mechanism is provided between every two second conveyor belts, and the switching mechanism includes a first cylinder fixedly connected to the closing cover and a sub-dividing piece rotatably connected to the closing cover, one end of the sub-dividing piece is connected to the cylinder, and a rotatable shaft is provided in the middle of the sub-dividing piece, and the sub-dividing piece is rotatably connected to the closing cover through the rotatable shaft.

10. The environmentally friendly device for automatic unloading and automatic charging of a biomass boiler as claimed in claim 1, characterized in that: A material guiding structure is provided in each of the material distribution hoppers, and the material guiding structure includes an active rod and four driven rods. A fixing mechanism is fixedly connected to the closing cover, one end of the active rod is fixedly connected to the fixing mechanism and the other end is connected to the second cylinder, the lower end of the second cylinder is connected to a connecting block, the upper ends of the four driven rods are rotatably connected to the fixing mechanism, the lower ends of the four driven rods are respectively connected to the connecting blocks through connecting rods, and the two ends of the connecting rod are respectively rotatably connected to the connecting block and the driven rod.

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