Anti-blocking wood chip conveying device

Abstract

The utility model relates to an anti-blocking wood chip conveying device which comprises a box body, a feeding port and a discharging port are formed in the top and the bottom of the box body respectively, conveying pipes are arranged at the bottom of the box body at intervals, the discharging port extends downwards in an inclined mode and is communicated with the conveying pipes, conveying motors are arranged at one ends of the conveying pipes at intervals, and augers are arranged in the conveying pipes. The bottom end of the stirring shaft downwards extends out of the box body and is in transmission connection with a central shaft of the packing auger; a drying assembly is further arranged in the box body, and a cooling assembly is arranged in the conveying pipe. According to the invention, a hot air drying and ventilation cooling combined mode is adopted, so that the problem of accumulation of wood chips caked due to damp can be solved by heating, and the wood chips in the conveying pipeline can be cooled to a state with the same temperature as the outside by introducing normal-temperature air; and wood chips in a high-temperature state are prevented from being directly discharged to be affected by moisture regain, and the production quality of wood chip products can be effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of wood chip conveying equipment, and specifically to an anti-clogging wood chip conveying device. Background Technology

[0002] Wood chips encompass wood fragments produced through various methods, including not only sawdust but also wood particles or fragments produced by processes such as planing, sanding, and pulverizing. Their shapes and sizes are more diverse, potentially including flakes, blocks, and granules, with significant size variations. Their uses are also varied, primarily as fuel and lightweight filler, or to be combined into engineered wood products such as MDF (medium-density fiberboard). They can also be used as a raw material for papermaking.

[0003] Wood chips are mainly composed of cellulose, hemicellulose, and lignin. These components are hydrophilic and easily absorb moisture from the air, especially during storage. When wood chips absorb enough moisture, their surface becomes damp and sticky. Due to the inherent flexibility and compressibility of wood chips, the increased friction between the moist particles causes them to stick together. As the moisture content increases, more and more wood chips adhere and clump together, eventually forming lumps that can cause blockages during transport.

[0004] Existing conveying equipment has a simple structure, generally using spiral blades and other structures to stir the wood chips at the discharge port, thereby solving the blockage problem by guiding and conveying them. However, even after the wood chips are conveyed into the processing equipment, the clumps of wood chips still contain moisture, which will affect the subsequent crushing effect of the wood chips, hinder the uniformity of mixing, and thus change the physical properties of the product, resulting in a decline in production quality. Utility Model Content

[0005] Based on the above description, this utility model provides an anti-clogging sawdust conveying device to solve the shortcomings of existing sawdust conveying equipment that lacks drying function and cannot effectively guarantee product quality even if the sawdust is discharged into the processing equipment by guiding and conveying.

[0006] This utility model is achieved through the following technical solution:

[0007] A clog-resistant sawdust conveying device includes a housing with an inlet and a outlet at the top and bottom, respectively. Conveying pipes are spaced apart at the bottom of the housing. The outlet extends downwards at an angle and communicates with the conveying pipes. A conveying motor is spaced apart at one end of each conveying pipe. An auger is installed inside the conveying pipe, with its central axis extending to the outside of the pipe. A stirring shaft is vertically positioned at the center of the housing, with spiral blades on it. The bottom end of the stirring shaft extends downwards to the outside of the housing and is connected to the central axis of the auger. A drying assembly is also installed inside the housing, communicating with the stirring shaft. A cooling assembly is installed inside the conveying pipe, communicating with the auger.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the drying assembly includes an air compressor fixedly installed on the top surface of the housing. The air compressor is connected to a heater. The output end of the heater is vertically downward and extends into the interior of the housing. The interiors of the stirring shaft and the spiral blades are hollow and interconnected. The top end face of the stirring shaft is also provided with an opening. A ball bearing is provided at the opening. The output end of the air compressor is vertically inserted into the central hole of the ball bearing and fixedly connected to the inner ring. Sealing gaskets are also provided on both sides of the ball bearing.

[0010] Furthermore, spray holes are provided on the outer walls of both the spiral blades and the stirring shaft, and multiple spray holes are provided that communicate with each other within the internal space of the spiral blades and the stirring shaft.

[0011] Furthermore, the side wall of the housing is provided with a heating chamber, and the heating chamber is provided with an air inlet pipe, which is connected to the output end of the heater.

[0012] Furthermore, an exhaust pipe is provided on the side of the heating chamber away from the air inlet pipe, and an air outlet pipe is provided on the top surface of the box and communicates with the inside of the box. Both the exhaust pipe and the air outlet pipe are connected to the outside air.

[0013] Furthermore, the cooling component includes an air inlet pipe disposed on one side of the conveying pipe, the auger is hollow inside and has several air holes on its surface, and the end face of the auger away from the conveying motor is provided with a through hole, the through hole is movably connected to one end of the air inlet pipe by a bearing structure, and the other end of the air inlet pipe is connected to the air compressor.

[0014] Furthermore, a filter is also provided on the air inlet end of the air compressor.

[0015] Furthermore, a transmission gear is provided at one end of the auger central shaft located outside the conveying pipe, and a driven gear is provided at the bottom end of the stirring shaft, with the transmission gear and the driven gear engaging in transmission.

[0016] Furthermore, temperature sensors are installed inside both the housing and the delivery pipe, and a controller is also provided on the outer wall of the housing. The controller is electrically connected to the temperature sensors, the heater, and the air compressor via wires.

[0017] Furthermore, the conveying pipe is also provided with an exhaust port, and the exhaust port is equipped with a filter screen.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] This application improves upon existing conveying equipment by combining hot air drying and ventilation cooling. This not only solves the problem of wood chips accumulating due to moisture by heating, but also lowers the temperature of the wood chips in the conveying pipeline to the same level as the outside temperature by introducing ambient air. This prevents the wood chips from being directly discharged at high temperatures and becoming damp again. Furthermore, the entire drying and cooling operation is completed during transportation, which not only effectively ensures the production quality of the wood chip products, but also saves a lot of time. It is very convenient to use when transferring and producing wood chips. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the box and the conveying pipe in this embodiment;

[0021] Figure 2 This is a schematic diagram of the box structure in this embodiment;

[0022] Figure 3 This is a schematic diagram of the conveying pipe in this embodiment;

[0023] Figure 4 This is a schematic diagram of the stirring shaft in this embodiment;

[0024] Figure 5 This is a schematic diagram of the auger structure in this embodiment;

[0025] The components are as follows: 1. Housing; 11. Controller; 12. Stirring shaft; 13. Driven gear; 14. Feed inlet; 15. Discharge outlet; 16. Heating chamber; 17. Air inlet pipe; 2. Conveying pipe; 21. Conveying motor; 22. Transmission gear; 23. Screwdriver; 24. Exhaust port; 3. Drying assembly; 31. Air compressor; 32. Heater; 4. Cooling assembly; 41. Air inlet pipe. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] Combination Figure 1-5 As shown, an anti-clogging sawdust conveying device includes:

[0029] Box 1 is a container for storing sawdust. It has a feed inlet 14 and a discharge outlet 15 at the top and bottom, respectively, and a valve should also be provided on the discharge outlet 15.

[0030] The conveying pipe 2 is located at the bottom of the box 1 and is connected to the discharge port 15 below the box 1. It is used to transfer and convey the wood chips inside the box 1 through the auger 23 structure so as to produce wood chip products.

[0031] The drying component 3 dehumidifies the wood chips inside the chamber 1 by injecting hot air into the chamber 1 and simultaneously using a stirring function, so as to break up the clumps of wood chips and prevent them from causing blockage of the discharge.

[0032] The cooling component 4 is installed inside the conveying pipe 2. By injecting outside air, it cools the wood chips at high temperature to the same temperature as the outside air, thus preventing moisture from returning due to high temperature.

[0033] Specifically, in this embodiment, a stirring shaft 12 is vertically installed inside the box 1, and the stirring shaft 12 is equipped with spiral blades to guide and transport the wood chips accumulated inside the box 1, so as to ensure that the wood chips can be smoothly discharged into the conveying pipe 2 through the discharge port 15 at the bottom.

[0034] In addition, a conveying motor 21 is provided at one end of the conveying pipe 2. The output end of the conveying motor 21 extends inward and is connected to the auger 23 rotatably installed inside the conveying pipe 2. The central shaft of the auger 23 extends to the outside of the conveying pipe 2 at the other end, and a transmission gear 22 is fixedly installed on the outer wall. The bottom end of the stirring shaft 12 extends to the bottom of the box 1 and a driven gear 13 is correspondingly provided at the bottom end. The transmission gear 22 and the driven gear 13 are meshed with each other using a helical gear structure. Therefore, as long as the output motor is started, the stirring shaft 12 and the auger 23 can start running simultaneously by means of gear transmission.

[0035] In addition, staff can also equip the stirring shaft 12 with a motor for control.

[0036] Based on the above structure, the drying assembly 3 includes an air compressor 31, i.e., an air compressor, fixedly installed on the top of the housing 1, used to pressurize and assist in the delivery of outside air. In addition, the air compressor 31 is provided with a three-way pipe, one end of which is connected to the heater 32 (i.e., a high-temperature air generator or an industrial electric furnace or other heating equipment). The stirring shaft 12 and the spiral blades provided on the outer wall of the stirring shaft 12 are both hollow inside, and the side walls of the stirring shaft 12 and the spiral blades are also provided with several through holes that communicate with their interiors. A circular opening is also provided on the top end face of the stirring shaft 12, and a ball bearing is provided inside the opening. The output end of the heater 32 is vertically inserted into the center hole of the ball bearing through a pipe, and both sides of the ball bearing are sealed with gaskets. Therefore, the air compressor 31 can continuously inject high-temperature air into the interior without affecting the rotation and stirring of the stirring shaft 12.

[0037] Several nozzles are provided on the surface of the stirring shaft 12 and the spiral blades. These nozzles are used to directly transfer hot air into the box 1, so that it can directly contact the wood chips accumulated inside the box 1. By heating them, the moisture inside is evaporated and then discharged directly to the outside through the exhaust pipe at the top of the box 1.

[0038] In addition, since the range that the spiral blades can reach is limited, in order to further improve the drying efficiency of the entire box 1, a heating chamber 16 should also be opened inside the side wall of the box 1. The top of the heating chamber 16 is provided with an air inlet pipe 17, which is also connected to the output end of the heater 32. Therefore, the heating structure can use the combination of internal and external methods to quickly dry the wood chips. When the clumps of wood chips are dried, they will be more easily broken up by the spiral blades so that the wood chips can participate in the subsequent conveying.

[0039] The heating chamber 16 and the interior of the box 1 should also be equipped with exhaust pipes or holes. The staff can connect the exhaust pipes to the air inlet of the heater 32 to reuse the residual heat of the exhaust gas. At the same time, new air can be added with the air compressor 31 for reheating. Alternatively, the connection between the air compressor 31 and the heater 32 can be directly cut off by the air valve, and then the heater 32 and the booster pump can be used for separate circulation heating. This allows for convenient and precise control of the heating temperature of the wood chips inside the box 1.

[0040] However, in actual use, due to the high temperature and the hydrophilic nature of the wood chips, they are very prone to moisture absorption. In order to effectively avoid this phenomenon, the wood chips need to be cooled to room temperature. In this embodiment, a cooling component 4 is directly equipped on the conveying pipe 2 at the bottom of the box 1.

[0041] The cooling component 4 includes an air inlet pipe 41 located on one side of the conveying pipe 2. One end of the air inlet pipe 41 is connected to another three-way connector of the air compressor 31. The central shaft of the auger 23 inside the conveying pipe 2 extends to the outside of the conveying pipe 2 and has a through hole on its end face. The auger 23 also adopts a structure similar to the stirring shaft 12 and the spiral blades mentioned above, making its interior hollow and simultaneously opening holes on the outer wall of the auger 23. Then, ball bearings are arranged inside the through holes to connect with the other end of the air inlet pipe 41. This allows air at room temperature to be quickly delivered to the inside of the conveying pipe 2 and come into direct contact with the wood chips at high temperature. At the same time, an exhaust port 24 for discharging hot air should be provided on the outer wall of the conveying pipe 2, and a filter screen should be installed on the exhaust port 24 to prevent the airflow from carrying away the wood chips.

[0042] Based on this, both the heating structure and the cooling component 4 are supplied with air by the air compressor 31. When the wood chips that have been treated at high temperature enter the conveying pipe 2, they will come into direct contact with the cold air, thereby removing the temperature from the wood chips and making the temperature at the outlet at the bottom of the conveying pipe 2 the same as the outside temperature. This effectively prevents the wood chips from becoming damp due to high temperature.

[0043] In addition, in the above structure, the air entering the housing 1 should also be filtered to prevent impurities and moisture from entering the housing 1, thus affecting the production quality of wood products. Therefore, a filter structure, such as activated carbon, limestone, and silica gel, can be installed at the air inlet of the air compressor 31, or these materials can be combined into a multi-layer filter structure to ensure that impurities and moisture from the outside air cannot enter the pipeline.

[0044] Multiple temperature sensors should also be installed inside the housing 1 and the conveying pipe 2 to monitor the temperature inside the housing 1 and the conveying pipe 2 in real time. This will allow staff to adjust the air intake and the heating temperature of the heater 32. A controller 11 should also be installed on the surface of the housing 1. This controller 11 can be an existing Siemens S7-200, S7-300, or other PLC controller. It should be electrically connected to the heater 32, the conveying motor 21, the air compressor 31, and the temperature sensors via wires. The controller can not only display the internal temperature in real time on the surface display, but also automatically adjust the relationship between the stirring speed, the heat of the hot air, and the hot air input speed through programming to keep them in a relatively balanced state, so that the sawdust is cooled to room temperature when it is discharged from the conveying pipe 2.

[0045] In the above structure, the air compressor 31 should be started first, and the heater 32 should be started under the premise of air filling. The wood chips with a certain moisture content inside the box 1 should be heated and stirred by stirring first, and then discharged into the conveying pipe 2. This can avoid the damp wood chips being discharged into the conveying pipe 2 before they are completely dried.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A clog-resistant sawdust conveying device, characterized in that, The container includes a housing (1), with an inlet (14) at the top and a outlet (15) at the bottom. A conveying pipe (2) is also spaced at the bottom of the housing (1). The outlet (15) extends downwards at an angle and communicates with the conveying pipe (2). A conveying motor (21) is spaced at one end of the conveying pipe (2). An auger (23) is also installed inside the conveying pipe (2), with its central axis extending to the outside of the conveying pipe (2). A stirring shaft (12) is vertically arranged at the center of the body (1). The stirring shaft (12) is provided with spiral blades, and the bottom end of the stirring shaft (12) extends downward to the outside of the box (1) and is connected to the central shaft of the auger (23). A drying component (3) is also provided inside the box (1). The drying component (3) is connected to the stirring shaft (12). A cooling component (4) is provided inside the conveying pipe (2). The cooling component (4) is connected to the auger (23).

2. The anti-clogging sawdust conveying device according to claim 1, characterized in that, The drying assembly (3) includes an air compressor (31) fixedly installed on the top surface of the housing (1). The air compressor (31) is connected to a heater (32). The output end of the heater (32) is vertically downward and extends into the interior of the housing (1). The interior of the stirring shaft (12) and the spiral blades are hollow and interconnected. The top end face of the stirring shaft (12) is also provided with an opening. A ball bearing is provided at the opening. The output end of the air compressor (31) is vertically inserted into the center hole of the ball bearing and fixedly connected to the inner ring. Sealing gaskets are also provided on both sides of the ball bearing.

3. The anti-clogging sawdust conveying device according to claim 2, characterized in that, Spray holes are provided on the outer walls of the spiral blades and the stirring shaft (12), and multiple spray holes are provided and communicate with each other in the internal space of the spiral blades and the stirring shaft (12).

4. The anti-clogging sawdust conveying device according to claim 3, characterized in that, The side wall of the housing (1) is also provided with a heating chamber (16), and the heating chamber (16) is also provided with an air inlet pipe (17), which is connected to the output end of the heater (32).

5. The anti-clogging sawdust conveying device according to claim 4, characterized in that, The heating chamber (16) is provided with an exhaust pipe on the side away from the air inlet pipe (17), and the top surface of the box (1) is also provided with an air outlet pipe that communicates with the inside of the box (1). Both the exhaust pipe and the air outlet pipe are connected to the outside air.

6. The anti-clogging sawdust conveying device according to claim 5, characterized in that, The cooling component (4) includes an air inlet pipe (41) disposed on one side of the conveying pipe (2). The auger (23) is hollow inside and has several air holes on its surface. The end face of the auger (23) away from the conveying motor (21) is provided with a through hole. The through hole is movably connected to one end of the air inlet pipe (41) by means of a bearing structure. The other end of the air inlet pipe (41) is connected to the air compressor (31).

7. The anti-clogging sawdust conveying device according to claim 6, characterized in that, The air compressor (31) is also equipped with a filter at the air inlet end.

8. The anti-clogging sawdust conveying device according to claim 7, characterized in that, The auger (23) has a transmission gear (22) on one end of its central shaft located outside the conveying pipe (2), and the bottom end of the stirring shaft (12) has a driven gear (13). The transmission gear (22) and the driven gear (13) are engaged in transmission.

9. The anti-clogging sawdust conveying device according to claim 8, characterized in that, Temperature sensors are provided inside the housing (1) and the conveying pipe (2), and a controller (11) is also provided on the outer wall of the housing (1). The controller (11) is electrically connected to the temperature sensor, the heater (32) and the air compressor (31) respectively through wires.

10. The anti-clogging sawdust conveying device according to claim 1, characterized in that, The delivery pipe (2) is also provided with an exhaust hole (24), and the exhaust hole (24) is equipped with a filter screen.

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