Sanding powder adding device

Abstract

The utility model belongs to the technical field of mechanical equipment, and relates to a sanding powder adding device which is composed of a feeding system and a conveying system, the feeding system comprises a metering bin, a weighing sensor, a discharging screw, a shell, a discharging opening, a discharging valve and a flexible material guiding component, and the conveying system comprises a discharging pipe, a discharging accelerator, an air conveying pipe, a fan and a silencer. One end of the flexible material guide component is connected with a discharge valve in the feeding system, and the other end of the flexible material guide component is connected with a discharge accelerator in the conveying system. By arranging the feeding system and the conveying system, accurate metering and efficient conveying of sanding powder are achieved, stability is good, flexibility is high, noise is low, the sanding powder is installed at the inlet position of the drying pipe, the sanding powder and wet fibers which are not dried after sizing are mixed in flue gas turbulent flow of the drying pipe and are attached to the surfaces of the fibers, mixing uniformity is good, and the influence on the performance of a fiberboard is small; the method saves wood resources, reduces production cost and can be widely applied to the field of fiberboard production.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment and relates to a sanding powder adding device. Background Art

[0002] In recent years, with the vigorous development of the domestic wood-based panel industry, the demand for wood has increased, the wood resources in the market have become increasingly scarce, and the price of wood has continued to rise. Taking fiberboard as an example, the cost of wood raw materials accounts for about 40% of the production cost. At present, many companies are actively looking for other materials that can partially replace wood in order to reduce the unit consumption of wood, save costs, and achieve sustainable development.

[0003] The sanding powder in the wood industry mainly includes sanding waste from the processing of wood, artificial boards, painted wood products and other materials. It is the debris and dust generated when the sander sands the surface of the board. According to incomplete statistics, a medium (high) density fiberboard continuous hot pressing production line with an annual output of 200,000 cubic meters produces an average of 10 to 15 tons of sanding powder per day. The conventional treatment solution is to add sanding powder in the pipeline after the fiber is dried and sorted and before it enters the paving, but the fiber is already in a relatively dry state at this time, and the mixing of sanding powder and fiber is poor. In addition, the sanding powder itself is in a loose powder state. In the absence of sizing, the mechanical strength of the prepared fiberboard is also reduced to a certain extent.

[0004] Therefore, how to add sanding powder to fiberboard production, ensure that the sanding powder and wood fiber are evenly mixed, and that the strength of the board is not reduced, is a common problem faced by fiberboard companies. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a sanding powder adding device, which can evenly add sanding powder to the fiberboard to replace part of the wood fiber, reduce wood input, and lower production costs.

[0006] Technical Solution

[0007] A sanding powder adding device, consisting of a feeding system and a conveying system.

[0008] The feeding system includes a metering silo, a weighing sensor, a discharging screw, a housing, a discharging port, a discharging valve and a flexible material guiding component, wherein:

[0009] The upper part of the metering silo is a cuboid, and the lower part is a quadrangular platform;

[0010] There are two weighing sensors, which are symmetrically installed on the outside of the quadrangular platform at the bottom of the metering silo;

[0011] The discharging screws are provided with two groups, which are installed in parallel inside the housing;

[0012] The upper part of the shell is a rectangular parallelepiped, the size of which is the same as the cross-section of the quadrangular pyramid at the lower part of the metering silo, and the lower part is in the shape of a quadrangular pyramid;

[0013] The discharge port is in the shape of a truncated cone and is installed at the lower end of the shell. The bottom of the discharge port is connected to a discharge valve.

[0014] The conveying system includes: a discharge pipe, a discharge accelerator, an air delivery pipe, a fan and a muffler, wherein:

[0015] The discharge pipe is composed of a straight pipe and an elbow, which are connected by flanges, and the straight pipe and elbow can be increased or decreased according to actual needs;

[0016] One side of the discharging accelerator is connected to the discharging pipe, and the other side is connected to the air supply pipe, which are connected by flanges;

[0017] The other side of the air delivery pipe is connected to a fan;

[0018] One end of the flexible material guiding component is connected to a discharge valve in the feeding system, and the other end is connected to a discharge accelerator in the conveying system.

[0019] In a preferred disclosed example of the utility model, the flexible material guiding component is a material guiding cloth bag or a material guiding film bag.

[0020] In a preferred disclosed example of the utility model, the discharge valve is air-sealed.

[0021] In a preferred disclosed example of the utility model, the two ends of the discharge accelerator are cylinders, the middle is a cylinder, and they are respectively transitioned by frustums.

[0022] Furthermore, the diameter of the top surface of the truncated cone is the same as the diameter of the middle cylinder, and the diameter of the bottom surface of the truncated cone is the same as the diameter of the cylinders at both ends.

[0023] Furthermore, the diameter of the middle cylinder is smaller than the diameters of the cylinders at both ends.

[0024] In a preferred disclosed example of the utility model, the blower is a Roots blower.

[0025] Furthermore, the fan is also connected to a muffler.

[0026] Furthermore, the fan is placed on a base.

[0027] In a preferred disclosed example of the utility model, the base is horizontally installed on the ground and fixed by anchor bolts.

[0028] The sanding powder adding device provided by the utility model is used for collecting the sanding powder generated during the sanding process of the fiberboard through a bag dust collector, and can be selected to enter a common silo for storage or enter the metering silo of the utility model through a pneumatic three-way valve. When sanding powder needs to be added to the fiber, the sanding powder can be selected to enter the metering silo, and the addition ratio of the sanding powder can be accurately measured by a weighing sensor. Two groups of discharge screws are configured below the metering silo to convey the sanding powder, and the speed and number of the discharge screws can be controlled according to different amounts of sanding powder added. The discharge screw transports the sanding powder to the discharge port, and then enters the discharge accelerator through the discharge valve and the flexible guide component. The unique structure of the discharge accelerator with thick ends and thin middle can convert the wind delivered by the Roots blower into a higher flow rate, so that the sanding powder is accelerated to be ejected from the discharge pipe, and it is not easy to generate material accumulation or block the pipeline. The discharge valve and the discharge accelerator are connected by a flexible guide component, which can eliminate the influence of vibration generated when the feeding system and the conveying system are running separately, and the equipment operation is more stable. The Roots blower is equipped with a muffler, which makes little noise during operation.

[0029] Beneficial Effects

[0030] The utility model realizes accurate measurement and efficient conveying of sanding powder by setting a feeding system and a conveying system, has good stability, high flexibility and low noise, is installed at the entrance of a drying tube, mixes with undried wet fibers after gluing in the turbulent smoke of the drying tube, adheres to the fiber surface, has good mixing uniformity, has little effect on the performance of the fiberboard, saves wood resources, reduces production costs, and can be widely used in the field of fiberboard production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 .Structural diagram of the sanding powder adding device,

[0032] Figure 2 .Left view of the discharge screw housing and discharge port in the sanding powder adding device,

[0033] Figure 3 . Schematic diagram of the application of the sanding powder adding device;

[0034] Among them, the components are marked as: 1. Pneumatic three-way valve, 2. Measuring silo, 3. Weighing sensor, 4. Discharge screw, 5. Housing, 6. Discharge port, 7. Discharge valve, 8. Flexible material guide component, 9. Discharge pipe, 10. Discharge accelerator, 11. Air duct, 12. Anchor bolt, 13. Base, 14. Fan, 15. Muffler, 16. Mixing chamber, 17. Drying pipe, 18. Drying fan, 19. Refiner, 20. Cyclone separator. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0036] A sanding powder adding device is composed of a feeding system and a conveying system. The feeding system includes: a metering silo 2, a weighing sensor 3, a discharging screw 4, a housing 5, a discharge port 6, a discharge valve 7 and a flexible material guide component 8, wherein:

[0037] The metering silo 2 is divided into two parts as a whole, the upper part is a rectangular parallelepiped, and the lower part is a quadrangular pyramid;

[0038] There are two weighing sensors 3, which are respectively installed on the outer sides of the four-sided platform at the bottom of the metering silo 2;

[0039] There are two groups of discharge screws 4, which are installed in parallel inside the housing 5;

[0040] The upper part of the housing 5 is a rectangular parallelepiped, and its length and width are the same as the bottom of the metering silo 2; the lower part is a quadrangular pyramid;

[0041] The discharge port 6 is in the shape of a truncated cone and is installed below the rightmost end of the discharge spiral housing 5. The bottom of the discharge port 6 is connected to a discharge valve 7;

[0042] Furthermore, the discharge valve 7 is airtight.

[0043] The flexible material guiding component 8 is connected to the discharge valve 7 on the upper side and to the discharge accelerator 10 on the lower side;

[0044] Further, the flexible material guiding component 8 is a material guiding cloth bag or a material guiding film bag;

[0045] On the other hand, the conveying system includes: a discharge pipe 9, a discharge accelerator 10, an air supply pipe 11, a Roots blower 14 and a muffler 15;

[0046] The discharge pipe 9 is composed of a straight pipe and an elbow, which is connected by a flange. The number of straight pipes and elbows can be increased or decreased according to actual needs;

[0047] The discharge accelerator 10 is connected to the discharge pipe 9 on the left side and to the air supply pipe 11 on the right side, and the connection method is flange connection;

[0048] Further, the discharge accelerator 10 is divided into five parts, the two ends are cylinders, the middle left and middle right are truncated cones, and the middle is a cylinder;

[0049] Furthermore, the diameter of the top surface of the truncated cone is the same as the diameter of the middle cylinder, and the diameter of the bottom surface of the truncated cone is the same as the diameter of the cylinders at both ends;

[0050] Furthermore, the diameter of the middle cylinder is smaller than the diameters of the cylinders at both ends;

[0051] The right side of the air delivery pipe 11 is connected to a Roots blower 14;

[0052] Furthermore, the Roots blower 14 is connected to a muffler 15 on the upper side and to a base 13 on the lower side;

[0053] Furthermore, the base 13 is installed on the ground and fixed by anchor bolts 12 .

[0054] The sanding powder generated during the sanding process of the fiberboard is collected by a bag dust collector and can be selected to enter an ordinary silo for storage or enter the metering silo 2 of the utility model through a pneumatic three-way valve 1. When it is necessary to add sanding powder to the fiber, the sanding powder can be selected to enter the metering silo 2, and the addition ratio of the sanding powder can be accurately measured by the weighing sensor 3. Two groups of discharge screws 4 are configured below the metering silo 2 to convey the sanding powder, and the speed and quantity of the discharge screws 4 can be controlled according to the different amounts of sanding powder added. The discharge screw 4 transports the sanding powder to the discharge port 6, and then enters the discharge accelerator 10 through the discharge valve 7 and the flexible guide component 8. The unique structure of the discharge accelerator 10, which is thick at both ends and thin in the middle, can convert the wind delivered by the Roots blower 14 into a higher flow rate, allowing the sanding powder to be ejected from the discharge pipe 9 at an accelerated speed, and it is not easy to accumulate material in the pipeline or block the pipeline. The discharge valve 7 and the discharge accelerator 10 are connected by a flexible material guide component 8, which can eliminate the influence of vibrations generated by the feeding system and the conveying system when they are running, and the equipment runs more stably. The Roots blower 14 is equipped with a muffler 15, and the noise is small during operation.

[0055] See attached Figure 3 The fiber slurry from the pulping machine 19 enters the drying tube 17 after sizing. The smoke generated by the heat center is mixed with fresh air in the mixing chamber 16 and transported to the drying tube 17 through the drying fan 18 to dry the wet fiber. The sanding powder is added at a later position of the wet fiber inlet in the drying tube 17, and is evenly mixed with the wet fiber that has not been dried after sizing under the action of smoke turbulence, adheres to the fiber surface, and enters the next process together.

[0056] The sanding powder adding device provided by the utility model realizes accurate measurement and efficient conveying of sanding powder by setting a feeding system and a conveying system, has good stability, high flexibility and low noise. The sanding powder is evenly mixed with the fiber, does not affect the interweaving between the fibers, has little effect on the performance of the fiberboard, saves wood resources, reduces production costs, and can be widely used in the field of fiberboard production.

[0057] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A sanding powder adding device, consisting of a feeding system and a conveying system, characterized in that: The feeding system comprises a metering silo (2), a weighing sensor (3), a discharge screw (4), a housing (5), a discharge port (6), a discharge valve (7) and a flexible material guide component (8), wherein: The upper part of the metering silo (2) is a rectangular parallelepiped, and the lower part is a quadrangular pyramid; The weighing sensors (3) are provided with two and are symmetrically mounted on the outer side of the quadrangular platform at the bottom of the metering silo (2); The discharging screws (4) are provided in two groups and are installed in parallel inside the housing (5); The upper part of the shell (5) is a rectangular parallelepiped, and its size is the same as the cross-section of the quadrangular pyramid at the lower part of the metering silo (2), and the lower part has a quadrangular pyramid shape; The discharge port (6) has a truncated cone shape and is mounted at the lower end of the housing (5). The bottom of the discharge port (6) is connected to a discharge valve (7). The conveying system comprises: a discharge pipe (9), a discharge accelerator (10), an air supply pipe (11), a fan (14) and a muffler (15), wherein: The discharge pipe (9) is composed of a straight pipe and an elbow, which are connected by flanges. The straight pipe and elbow can be increased or decreased according to actual needs. One side of the discharge accelerator (10) is connected to the discharge pipe (9), and the other side is connected to the air supply pipe (11), and the connection is via a flange; The other side of the air supply pipe (11) is connected to a fan (14); One end of the flexible material guiding component (8) is connected to a discharge valve (7) in the feeding system, and the other end is connected to a discharge accelerator (10) in the conveying system.

2. The sanding powder adding device according to claim 1, characterized in that: The flexible material guiding component (8) is a material guiding cloth bag or a material guiding film bag.

3. The sanding powder adding device according to claim 1, characterized in that: The discharge valve (7) is airtight.

4. The sanding powder adding device according to claim 1, characterized in that: The two ends of the discharge accelerator (10) are cylinders, the middle is a cylinder, and each is transitioned by a frustum.

5. The sanding powder adding device according to claim 4, characterized in that: The diameter of the top surface of the truncated cone is the same as the diameter of the middle cylinder, and the diameter of the bottom surface of the truncated cone is the same as the diameter of the cylinders at both ends.

6. The sanding powder adding device according to claim 4, characterized in that: The diameter of the middle cylinder is smaller than the diameters of the cylinders at both ends.

7. The sanding powder adding device according to claim 1, characterized in that: The blower (14) is a Roots blower.

8. The sanding powder adding device according to claim 1, characterized in that: The fan (14) is also connected to a muffler (15).

9. The sanding powder adding device according to claim 1, characterized in that: The fan (14) is placed on the base (13).

10. The sanding powder adding device according to claim 9, characterized in that: The base (13) is installed horizontally on the ground and fixed by anchor bolts (12).

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