Accurate control device for water content of wood shaving raw material

Abstract

The utility model discloses a wood shaving raw material moisture content accurate control device which comprises a drying cylinder used for drying wood shaving raw materials and a feeding hopper used for conveying the wood shaving raw materials into the drying cylinder, a temperature sensor is arranged in the drying cylinder, a feeding pipe is arranged on the lower surface of the feeding hopper and communicated with the lower portion of the drying cylinder, and the feeding pipe is communicated with the lower portion of the drying cylinder. A rotating column coaxial with the drying cylinder is rotationally arranged in the drying cylinder, and a spiral lifter is arranged on the rotating column. The heating temperature of the heater is intelligently controlled through the PLC, the dried wood shaving raw materials are quantitatively discharged into the material receiving box through the discharging pipe, the water content of a small amount of wood shaving raw materials is judged through weighing of the weighing table, and the wood shaving raw materials are conveyed to the next working procedure when the water content reaches the standard. And when the moisture content is high, the wood shavings are conveyed back into the feeding hopper again to be dried continuously, and the control accuracy of the moisture content of the wood shavings is greatly improved through batch and small-amount quantitative weighing, so that the overall quality of the shaving board is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of particleboards, in particular to a device for accurately controlling the moisture content of particleboard raw materials. Background Art

[0002] Particleboard, also known as particle board, is a kind of man-made board made by cutting various branches, small-diameter wood, fast-growing wood, sawdust, etc. into pieces of certain specifications, drying them, mixing them with glue, hardener, waterproofing agent, etc., and pressing them under a certain temperature and pressure. The particles are arranged unevenly. The tree species of the raw materials used in the particleboard blanks have a great influence on the quality and performance of the finished particleboard. Different tree species produce different quality particleboards under the same other conditions. Different particleboard raw materials have different optimal moisture contents. In the process of drying the wood chips, its moisture content needs to be controlled. Most of the existing drying equipment cannot accurately control the moisture content of the wood chips, resulting in poor quality. The quality of the produced particleboards is uneven, affecting the overall product quality. Therefore, we propose a precise moisture content control device for wood chip raw materials. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a device for accurately controlling the moisture content of shavings raw materials. By quantitatively weighing small amounts in batches, the accuracy of controlling the moisture content of shavings raw materials is greatly improved, thereby improving the overall quality of particleboard, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for accurately controlling the moisture content of wood shavings raw materials, comprising a drying cylinder for drying the wood shavings raw materials and a feed hopper for conveying the wood shavings raw materials into the drying cylinder, a temperature sensor is arranged in the drying cylinder, a feed pipe is arranged on the lower surface of the feed hopper, the feed pipe is connected with the lower part of the drying cylinder, a rotating column coaxially arranged therewith is rotatably arranged in the drying cylinder, a spiral lift is arranged on the rotating column, an interlayer is arranged in the drying cylinder, and an annular heater is installed in the interlayer; a discharge pipe is arranged on the upper side surface of the drying cylinder, a flap valve is arranged on the discharge pipe, and a detection device is arranged on the inner surface of the discharge pipe, a bottom plate is arranged below the discharge port of the discharge pipe, a weighing platform is arranged on the upper surface of the bottom plate, and a material receiving box is placed on the weighing platform.

[0005] As a preferred technical solution of the utility model, a motor frame is installed on the upper surface of the drying cylinder, a driving motor is installed on the motor frame, the output shaft of the driving motor passes through the lower side of the motor frame and is connected to the driving pulley, the top end of the rotating column passes through the upper surface of the drying cylinder and is connected to the driven pulley, and a belt is arranged between the driven pulley and the driving pulley.

[0006] As a preferred technical solution of the utility model, a dehumidification pipe is installed on the upper surface of the drying cylinder, and a dehumidification fan is installed in the dehumidification pipe.

[0007] As a preferred technical solution of the utility model, handles are symmetrically arranged on both side surfaces of the material receiving box.

[0008] As a preferred technical solution of the utility model, two groups of auxiliary slideways are symmetrically arranged on both sides of the bottom plate.

[0009] As a preferred technical solution of the utility model, a groove is provided on the upper surface of the auxiliary slideway, and a plurality of auxiliary rollers are evenly rotated and arranged in the groove.

[0010] As a preferred technical solution of the utility model, the detection device includes a plurality of groups of infrared signal transmitters and infrared signal receivers evenly arranged on the inner surface of the discharge pipe, and the heights of the plurality of groups of infrared signal transmitters and infrared signal receivers correspond one to one.

[0011] Compared with the prior art, the beneficial effects of the utility model are: a PLC controller is used to intelligently control the heating temperature of the heater, and the dried shavings raw materials are quantitatively discharged into a receiving box through a discharge pipe, and the moisture content of a small amount of shavings raw materials is judged by weighing on a weighing platform. When the moisture content meets the standard, it is transported to the next process, and when the moisture content is high, it is sent back to the feed hopper for further drying. By quantitatively weighing small amounts in batches, the moisture content control accuracy of the shavings raw materials is greatly improved, thereby improving the overall quality of the particleboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 A side view structural schematic diagram of;

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the front view structure.

[0015] In the figure: 1 drying cylinder, 2 feeding hopper, 3 feeding pipe, 4 heater, 5 rotating column, 6 spiral lifter, 7 driven pulley, 8 driving pulley, 9 belt, 10 motor frame, 11 driving motor, 12 dehumidification pipe, 13 dehumidification fan, 14 discharging pipe, 15 bottom plate, 16 weighing platform, 17 receiving box, 18 handle, 19 auxiliary slide, 20 auxiliary roller, 21 flap valve, 22 infrared signal transmitter, 23 infrared signal receiver. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3 The utility model provides a technical solution: a device for accurately controlling the moisture content of wood shavings raw materials, comprising a drying cylinder 1 for drying the wood shavings raw materials and a feeding hopper 2 for conveying the wood shavings raw materials into the drying cylinder 1, a temperature sensor is arranged in the drying cylinder 1 for detecting the heating temperature in the drying cylinder 1, an interlayer is arranged in the drying cylinder 1, and an annular heater 4 is installed in the interlayer for heating the inside of the drying cylinder 1, so as to dry the wood shavings raw materials.

[0018] A feed pipe 3 is provided on the lower surface of the feed hopper 2 . The feed pipe 3 is communicated with the lower part of the drying cylinder 1 . The wood shavings in the feed hopper 2 are transported to the drying cylinder 1 through the feed pipe 3 .

[0019] A rotating column 5 coaxially arranged therein is rotatably disposed in the drying cylinder 1, and a spiral lifter 6 is disposed on the rotating column 5. The spiral lifter 6 is driven by the rotating column 5 to rotate, so that the wood shavings at the bottom are lifted to the upper part and dried in the process.

[0020] A discharge pipe 14 is arranged on the upper side surface of the drying cylinder 1, an electrically controlled flap valve 21 is arranged on the discharge pipe 14, and a detection device is arranged on the inner surface of the discharge pipe 14, the detection device comprises a plurality of groups of infrared signal transmitters 22 and infrared signal receivers 23 which are evenly arranged on the inner surface of the discharge pipe 14, the heights of the plurality of groups of infrared signal transmitters 22 and infrared signal receivers 23 correspond one to one, the infrared signal emitted by the infrared signal transmitter 22 is received by the infrared signal receiver 23 which is located at the same height, the infrared signal receiver 23 continuously sends corresponding signals to the PLC controller, when the wood shavings raw materials in the discharge pipe 14 are piled up to a certain height, the infrared signal transmitter 22 and the infrared signal receiver 23 which are located at the height will be blocked, so that the infrared signal receiver 23 at the height cannot receive the corresponding signal, at which time the signal sent by the infrared signal receiver 23 to the PLC controller is interrupted, and the PLC controller can judge the stacking height of the wood shavings raw materials in the discharge pipe 14 accordingly.

[0021] The shavings material lifted to the upper part enters the discharge pipe 14 and falls above the flap valve 21. The stacking height of the shavings material in the discharge pipe 14 is detected by the detection device, so as to judge the amount of the shavings material. The detection device transmits the detection result to the PLC controller. The PLC controller opens the flap valve 21 when it judges that the shavings material reaches the discharge amount according to the preset program, so that it is discharged from the discharge pipe 14.

[0022] A bottom plate 15 is provided below the discharge port of the discharge pipe 14, a weighing platform 16 is provided on the upper surface of the bottom plate 15, a receiving box 17 is placed on the weighing platform 16, and the receiving box 17 is open at the top and placed on the lower side of the discharge pipe 14. A PLC controller is used to intelligently control the heating temperature of the heater 4, and the dried wood shavings are quantitatively discharged into the receiving box 17 through the discharge pipe 14. The moisture content of a small amount of wood shavings is judged by weighing on the weighing platform 16. When the moisture content meets the standard, it is transported to the next process. When the moisture content is high, it is sent back to the feed hopper 2 for further drying. By quantitatively weighing in batches and in small quantities, the moisture content control accuracy of the wood shavings is greatly improved, thereby improving the overall quality of the particleboard.

[0023] The preferred technical solution is that a motor frame 10 is installed on the upper surface of the drying cylinder 1, and a driving motor 11 is installed on the motor frame 10. The output shaft of the driving motor 11 passes through the lower side of the motor frame 10 and is connected to the driving pulley 8. The top of the rotating column 5 passes through the upper surface of the drying cylinder 1 and is connected to the driven pulley 7. A belt 9 is arranged between the driven pulley 7 and the driving pulley 8. The driving motor 11 drives the driven pulley 8 to rotate through the driving pulley 8 and the belt 9, thereby driving the rotating column 5 and the spiral elevator 6 to rotate, and the wood shavings raw material is lifted.

[0024] A further preferred technical solution is that a dehumidification pipe 12 is installed on the upper surface of the drying cylinder 1, and a dehumidification fan 13 is installed in the dehumidification pipe 12. During the drying process, the moisture evaporated from the wood shavings is discharged from the dehumidification pipe 12 through the dehumidification fan 13, which can quickly reduce the temperature and speed up the drying efficiency.

[0025] The heater 4, drive motor 11, dehumidification fan 13, weighing platform 16, flap valve 21, infrared signal transmitter 22 and infrared signal receiver 23 used in this application are all electrically connected to an external PLC controller. The PLC controller is preferably a commonly used Siemens S2-700 series PLC controller. The methods of controlling the above-mentioned electronic components are all commonly used methods in the prior art, and the heater 4, drive motor 11, dehumidification fan 13, weighing platform 16, flap valve 21, infrared signal transmitter 22 and infrared signal receiver 23 and PLC controller are all commonly used electronic components in the prior art. Their specific structures, working principles and circuit connections are all well-known technologies and will not be described in detail here.

[0026] According to a preferred technical solution, handles 18 are symmetrically provided on both side surfaces of the material receiving box 17, and the staff can conveniently move the material receiving box 17 through the handles 18, which makes the operation easier.

[0027] A further preferred technical solution is that two groups of auxiliary slides 19 are symmetrically arranged on both sides of the base plate 15, and the slides 19 have corresponding inclined slides and horizontal slides. The height of the horizontal slide is roughly the same as the height of the weighing platform 16. The staff can slide through the auxiliary slides 19 when moving the receiving box 17 onto the weighing platform 16 and when removing the receiving box 17 from the weighing platform 16, which saves time and effort and is easy to use.

[0028] Since the auxiliary slides 19 are provided on both sides, the staff can deliver the receiving box 17 to the weighing platform 16 from one side and remove the receiving box 17 from the weighing platform 16 from the other side, thereby realizing continuous operation and further improving work efficiency.

[0029] Furthermore, a groove is provided on the upper surface of the auxiliary slide 19, and a plurality of auxiliary rollers 20 are evenly rotated in the groove. When the material receiving box 17 moves on the auxiliary slide 19, the contact with the auxiliary rollers 20 can greatly reduce the friction, thereby saving more effort, and can also reduce the wear of the material receiving box 17 and the auxiliary slide 19, thereby extending their service life.

[0030] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A device for accurately controlling the moisture content of wood shavings raw material, comprising a drying cylinder (1) for drying the wood shavings raw material and a feed hopper (2) for conveying the wood shavings raw material into the drying cylinder (1), wherein a temperature sensor is arranged in the drying cylinder (1), and characterized in that: A feed pipe (3) is provided on the lower surface of the feed hopper (2), the feed pipe (3) is connected to the lower part of the drying cylinder (1), a rotating column (5) is rotatably provided in the drying cylinder (1) and is coaxially arranged therewith, a spiral lifter (6) is provided on the rotating column (5), an interlayer is provided in the drying cylinder (1), and an annular heater (4) is installed in the interlayer; a discharge pipe (14) is provided on the upper side surface of the drying cylinder (1), a flap valve (21) is provided on the discharge pipe (14), and a detection device is provided on the inner side surface of the discharge pipe (14); a bottom plate (15) is provided below the discharge port of the discharge pipe (14), a weighing platform (16) is provided on the upper surface of the bottom plate (15), and a material receiving box (17) is placed on the weighing platform (16).

2. The device for accurately controlling moisture content of wood chips according to claim 1, characterized in that: A motor frame (10) is mounted on the upper surface of the drying cylinder (1), a driving motor (11) is mounted on the motor frame (10), an output shaft of the driving motor (11) passes through the lower side of the motor frame (10) and is connected to a driving pulley (8), a top end of the rotating column (5) passes through the upper surface of the drying cylinder (1) and is connected to a driven pulley (7), and a belt (9) is provided between the driven pulley (7) and the driving pulley (8).

3. The device for accurately controlling moisture content of wood chips according to claim 1, characterized in that: A dehumidification pipe (12) is installed on the upper surface of the drying cylinder (1), and a dehumidification fan (13) is installed in the dehumidification pipe (12).

4. The device for accurately controlling moisture content of wood chips according to claim 1, characterized in that: Handles (18) are symmetrically provided on both side surfaces of the material receiving box (17).

5. The device for accurately controlling moisture content of wood chips according to claim 1, characterized in that: Two groups of auxiliary slideways (19) are symmetrically arranged on both sides of the bottom plate (15).

6. The device for accurately controlling moisture content of wood chips according to claim 5, characterized in that: The upper surface of the auxiliary slideway (19) is provided with a groove, and a plurality of auxiliary rollers (20) are evenly rotatably arranged in the groove.

7. The device for accurately controlling moisture content of wood chips according to claim 1, characterized in that: The detection device comprises a plurality of groups of infrared signal transmitters (22) and infrared signal receivers (23) uniformly arranged on the inner surface of the discharge pipe (14), and the heights of the plurality of groups of infrared signal transmitters (22) and infrared signal receivers (23) correspond one to one.

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