Hot grinding device for fiberboard raw materials

Abstract

The utility model relates to the field of wood crushing, and particularly discloses a hot grinding device for fiberboard raw materials, which comprises a grinding tank body, a bolt conveyor and a rotating main shaft, a static mounting disc and a static grinding disc thereof are arranged at the end part of the spiral conveyor, a movable mounting disc and a movable grinding disc are arranged at the end part of the rotating main shaft, and ribs are arranged on the surfaces of the mounting discs. Grooves are formed in the surface of the grinding disc, and the mounting disc and the grinding disc are connected through the ribs and the grooves and are fixed through bolts. Due to the design of the ribs and the grooves, counter-acting force can be effectively borne and dispersed, the bolt basically does not need to bear shear force, and even if the grinding disc is used for a long time, the bolt can still keep good structural integrity and can be smoothly detached from the installation position. In addition, when the bolt is disassembled, the ribs can also assist in bearing the grinding disc, and an operator only needs to apply small pressure in the axial direction to temporarily stabilize the grinding disc so as to safely and stably take away the grinding disc.

Description

Technical Field

[0001] This utility model belongs to the field of wood crushing, and specifically relates to a hot grinding device for fiberboard raw materials. Background Technology

[0002] Wood fiberboard is a three- or multi-layered sheet material made by rotary cutting wood segments into veneers or slicing wood blocks into thin sheets, and then gluing them together with adhesives. A thermomill can extract fibers from the sheet wood for use in the above-mentioned processes. First, the wood is heated by high-temperature and high-pressure steam (cooking stage), and then the thermomill grinds the raw material into fibers at a certain temperature and pressure using two grinding discs (moving and stationary).

[0003] The grinding disc is cast and has a one-piece structure. While separating fibers, the grinding disc itself experiences significant wear. Over the entire service life of the thermal mill, the cost of replacing the grinding disc may even exceed the purchase cost of the thermal mill itself. In existing thermal mills, the grinding disc is locked axially with bolts. During operation, centrifugal force acts on the grinding disc, leading to problems such as bolt misalignment and deformation, and worn bolt holes after prolonged use. This makes the bolts difficult to install and remove, and the grinding disc prone to loosening. Utility Model Content

[0004] The purpose of this invention is to provide a thermal grinding device for fiberboard raw materials that allows for easy assembly and disassembly of the grinding disc.

[0005] To achieve the above objectives, this utility model provides a thermal grinding device for fiberboard raw materials, including a grinding tank, a screw conveyor with one end inserted into the grinding tank, and a rotating main shaft with one end inserted into the grinding tank. A stationary mounting plate is fixedly installed at the end of the screw conveyor, and a stationary grinding disc is detachably mounted on the stationary mounting plate by bolts. A movable mounting plate is fixedly installed at the end of the rotating main shaft, and a movable grinding disc is detachably mounted on the movable mounting plate by bolts. The rotation actively drives the movable grinding disc to rotate, move closer to, or move away from the stationary grinding disc. The stationary mounting plate is provided with several parallel ribs, and the stationary grinding disc is correspondingly provided with several parallel grooves. The movable mounting plate is provided with several parallel ribs, and the movable grinding disc is correspondingly provided with several parallel grooves. The reaction force generated when the grinding disc rotates and crushes the material is absorbed by the ribs, thereby protecting the bolts.

[0006] As an improvement to the above solution, four ribs are provided on the same mounting plate, two of which are located in the diameter direction of the mounting plate, and two of which are located at the edge of the mounting plate, and are 5-10 cm away from the edge of the mounting plate.

[0007] As an improvement to the above solution, screw holes are provided at both ends of the ribs located on the edge, and straight holes are provided at corresponding positions on the edge of the grinding disc. After the bolt passes through the edge of the grinding disc, it is screwed into the screw holes to fix the mounting plate and the grinding disc.

[0008] As an improvement to the above solution, the mounting plate and the grinding plate are respectively provided with screw holes and straight holes in the axial direction. The bolts are screwed into the screw holes in the axial direction parallel to the mounting plate or the grinding plate to fix the mounting plate and the grinding plate.

[0009] As an improvement to the above solution, the screw conveyor and the rotating main shaft are both arranged horizontally, the stationary mounting plate, the stationary grinding plate, the moving mounting plate, and the moving grinding plate are arranged vertically, and a discharge port is provided at the bottom of the grinding tank.

[0010] As an improvement to the above solution, a transparent observation window is provided on the side of the grinding jar.

[0011] This utility model has the following beneficial effects:

[0012] The design of the ribs and grooves effectively absorbs and disperses reaction forces, thereby greatly reducing the load on the bolts. With this design, the bolts basically do not need to withstand shear forces, and even after prolonged use of the grinding disc, the bolts can still maintain good structural integrity, ensuring smooth removal from the installation position.

[0013] During the bolt removal process, several ribs are precisely adjusted to a horizontal position, allowing them to effectively support the grinding disc. At this point, the operator only needs to apply minimal axial pressure to temporarily secure the grinding disc. Subsequently, the operator can easily use a crane to precisely hook the grinding disc and smoothly remove it. This design significantly optimizes the loading and unloading process, making the entire process not only more convenient and efficient but also greatly improving operational safety and effectively reducing the risk of equipment damage and personnel injury due to improper loading and unloading. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of a thermal grinding apparatus according to one embodiment;

[0015] Figure 2 This is an exploded view of a portion of the structure near the screw conveyor in one embodiment.

[0016] Explanation of reference numerals in the attached drawings: 11. Grinding tank; 12. Screw conveyor; 13. Rotating spindle; 14. Discharge port; 21. Stationary mounting plate; 22. Stationary grinding disc; 31. Moving mounting plate; 32. Moving grinding disc; 41. Rib; 42. Groove; 43. Bolt. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0020] Reference Figure 1 and Figure 2This utility model discloses a thermal grinding device for fiberboard raw materials, including a grinding tank 11, a screw conveyor 12 with one end inserted into the grinding tank 11, and a rotating spindle 13 with one end inserted into the grinding tank 11. A stationary mounting plate 21 is fixedly mounted at the end of the screw conveyor 12, and a stationary grinding disc 22 is detachably mounted on the stationary mounting plate 21 via bolts 43. A movable mounting plate 31 is fixedly mounted at the end of the rotating spindle 13, and a movable grinding disc 32 is detachably mounted on the movable mounting plate 31 via bolts 43. As the names suggest, the stationary grinding disc 22 indicates that its posture does not change, while the movable grinding disc 32 indicates that it needs to be selected and moved in the axial direction. For ease of description, the mounting plate mentioned below includes both the stationary mounting plate 21 and the movable mounting plate 31; correspondingly, the grinding disc includes both the stationary grinding disc 22 and the movable grinding disc 32. The rotation actively drives the moving grinding disc 32 to rotate, move closer to or away from the stationary grinding disc 22; the stationary mounting disc 21 is provided with a number of parallel ribs 41, and the stationary grinding disc 22 is correspondingly provided with a number of parallel grooves 42. The moving mounting disc 31 is provided with a number of parallel ribs 41, and the moving grinding disc 32 is correspondingly provided with a number of parallel grooves 42. The reaction force generated when the grinding disc rotates and crushes the material is absorbed by the number of ribs 41, thereby protecting the bolts 43.

[0021] As an improvement to the above solution, four ribs 41 are provided on the same mounting plate. Two of the ribs 41 are located in the diameter direction of the mounting plate. Since the movable mounting plate 31 needs to be fitted into the screw conveyor 12, the middle rib 41 is divided into two. The two ribs 41 are located at the edge of the mounting plate and are 5-10cm away from the edge of the mounting plate.

[0022] As an improvement to the above solution, screw holes are provided at both ends of the edge rib 41 located at the edge, and straight holes are provided at the corresponding positions on the edge of the grinding disc. The bolt 43 passes through the edge of the grinding disc and is screwed into the screw hole to fix the mounting plate and the grinding disc.

[0023] As an improvement to the above solution, the mounting plate and the grinding disc are respectively provided with screw holes and straight holes in the axial direction. Bolts 43 are screwed into the screw holes in a direction parallel to the axial direction of the mounting plate or the grinding disc to fix the mounting plate and the grinding disc. This solution is a traditional method of fixing the grinding disc. The solution in this application further retains this design, and the grinding disc has double safety protection when fixed, making the fixation more secure.

[0024] As an improvement to the above scheme, the screw conveyor 12 and the rotating main shaft 13 are both arranged horizontally, the stationary mounting plate 21, the stationary grinding plate 22, the moving mounting plate 31, and the moving grinding plate 32 are arranged vertically, and the bottom of the grinding tank 11 is provided with a discharge port 14.

[0025] As an improvement to the above solution, a transparent observation window is provided on the side of the grinding tank 11. This solution allows staff to observe the grinding process directly.

[0026] The design of the ribs 41 and grooves 42 effectively withstands and disperses the reaction force, thereby greatly reducing the load on the bolts 43. Under this design, the bolts 43 basically do not need to withstand shear forces, and even after prolonged use of the grinding disc, the bolts 43 can still maintain good structural integrity, ensuring that they can be smoothly removed from the installation position.

[0027] During the disassembly of bolt 43, several ribs 41 are precisely adjusted to a horizontal position, allowing them to fully support the grinding disc. At this point, the operator only needs to apply a small amount of axial pressure to temporarily secure the grinding disc. Subsequently, the operator can easily use a crane to precisely hook the grinding disc and smoothly remove it. This design significantly optimizes the loading and unloading process of the grinding disc, making the entire process not only more convenient and efficient but also greatly improving operational safety and effectively reducing the risk of equipment damage and personnel injury due to improper loading and unloading.

[0028] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A thermal grinding apparatus for fiberboard raw materials, comprising a grinding tank, a screw conveyor with one end inserted into the grinding tank, and a rotating spindle with one end inserted into the grinding tank, characterized in that: A stationary mounting plate is fixedly installed at the end of the screw conveyor, and a stationary grinding disc is detachably mounted on the stationary mounting plate by bolts. A movable mounting plate is fixedly installed at the end of the rotating main shaft, and a movable grinding disc is detachably mounted on the movable mounting plate by bolts. The rotation actively drives the movable grinding disc to rotate, move closer to or away from the stationary grinding disc. The stationary mounting plate is provided with several parallel ribs, and the stationary grinding disc is correspondingly provided with several parallel grooves. The movable mounting plate is provided with several parallel ribs, and the movable grinding disc is correspondingly provided with several parallel grooves. The reaction force generated when the grinding disc rotates and crushes the material is absorbed by several ribs, thereby protecting the bolts.

2. The thermal grinding apparatus for fiberboard raw materials according to claim 1, characterized in that: Four ribs are provided on the same mounting plate. Two of the ribs are located in the diameter direction of the mounting plate, and two of the ribs are located at the edge of the mounting plate, 5-10cm away from the edge of the mounting plate.

3. The thermal grinding apparatus for fiberboard raw materials according to claim 2, characterized in that: Both ends of the ribs located on the edge are provided with screw holes, and the edge of the grinding disc is provided with straight holes at corresponding positions. After the bolt passes through the edge of the grinding disc, it is screwed into the screw holes to fix the mounting plate and the grinding disc.

4. The thermal grinding apparatus for fiberboard raw materials according to claim 3, characterized in that: The mounting plate and the grinding plate are respectively provided with screw holes and straight holes in the axial direction. The bolts are screwed into the screw holes in the axial direction parallel to the mounting plate or the grinding plate to fix the mounting plate and the grinding plate.

5. The thermal grinding apparatus for fiberboard raw materials according to claim 1, characterized in that: The screw conveyor and the rotating main shaft are both arranged horizontally, while the stationary mounting plate, the stationary grinding plate, the moving mounting plate, and the moving grinding plate are arranged vertically, and a discharge port is provided at the bottom of the grinding tank.

6. The thermal grinding apparatus for fiberboard raw materials according to claim 1, characterized in that: The grinding jar has a transparent observation window on its side.

Images