Flat die granulator elastic upper box body inner resistance fluctuation point structure
By setting guide sleeves and spherical contacts on the inner wall of the upper box of the flat die pellet mill to form an internal resistance fluctuation point structure, combined with the design of steel belts and arc-shaped fixing blocks, the problems of wear at the internal resistance fluctuation point and excessive stress on the fixed connection are solved, achieving better material sticking and arching prevention effects, and ensuring stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANYANG GEMCO ENERGY MACHINERY
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-21
Smart Images
Figure CN224524680U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flat die pellet mill, and in particular to the internal resistance fluctuation point structure on the elastic upper housing of the flat die pellet mill, belonging to the field of mechanical technology. Background Technology
[0002] A flat die biomass pellet mill is a device used to compress biomass raw materials (such as straw, sawdust, rice husks, etc.) into pellet fuel. Its main components are a flat die (die plate), which is generally placed horizontally with cylindrical holes (die holes) evenly distributed on its surface, and cylindrical rollers (usually 2-4) mounted on top of the flat die. The rollers have anti-slip grooves or raised ridges on their surfaces. The raw materials are squeezed into the die holes by radial pressure. A cutter is fixed under the die plate and is fixed to the edge of the flat die. As the flat die rotates, it carries the raw materials through the cutter, cutting the columnar pellets extruded from the die holes into a set length (5-30mm). The conditioned raw materials fall onto the surface of the flat die. The pressure rollers revolve around the center of the flat die under the drive of the transmission system, while also rotating on their own axis. The pressure rollers squeeze the raw materials to the die hole inlet. Under the action of friction, the raw materials are forcibly pushed into the die holes and extruded from below the die holes after being extruded and shaped. The cutter cuts the pellets to the set length and they fall into the discharge port. The applicant has disclosed this type of flat die pellet mill in multiple Chinese patent applications. For example, in Chinese patent CN111450775A, the applicant disclosed a high-efficiency anti-slip flat die pellet mill with an elastic upper box. The upper box of this pellet mill is made of a one-piece cylindrical structure rolled from steel plate, which has a certain degree of elasticity. Internal resistance fluctuation points are fixedly set on the inner wall of the cylinder. When the pressure roller rotates, it interferes with the internal resistance fluctuation points, thereby causing the upper box to deform, thus avoiding the phenomenon of material sticking and arching in the upper box. After long-term use, the problems of material sticking and arching can be solved to a certain extent. However, new problems have been found in use. First, the constant interference between the pressure roller and the internal resistance fluctuation points during the rotation of the pressure roller can easily lead to frequent stress on the internal resistance fluctuation points, resulting in wear, damage, and cracking. Second, because the internal resistance fluctuation points are located... The pressure roller shaft is positioned low and close to the fixed connection point between the upper box and the die plate (or lower box). This fixed connection point, like a tree root, creates a root effect; the closer the force is to the root, the harder it is to move. This results in excessive force at the fixed connection point when the pressure roller interferes with the internal resistance fluctuation point, easily leading to damage. Furthermore, it limits the deformation of the driving elastic upper box, failing to effectively eliminate material sticking and arching. During the operation of the flat die pellet mill, the material at the lower part of the upper box, gripped by the rollers, is less prone to sticking and arching; rather, the upper part of the upper box, further away from the rollers, is more susceptible. This means the aforementioned structure cannot completely resolve material sticking and arching issues during use, all of which affect the normal operation of the equipment. Summary of the Invention
[0003] The purpose of this invention is to overcome the aforementioned problems existing in the use of the internal resistance fluctuation point on the elastic upper housing of a flat die pellet mill, and to provide a structure for the internal resistance fluctuation point on the elastic upper housing of a flat die pellet mill.
[0004] To achieve the purpose of this utility model, the following technical solution is adopted: an internal resistance fluctuation point structure on the elastic upper box of a flat die pellet mill. The flat die pellet mill includes a die plate, an upper box, and a middle box. The upper box is an integral cylindrical structure made of rolled steel plate. The upper box is fixedly connected to the middle box, the die plate is supported on the middle box, the pressure roller frame is fixedly connected to the main shaft, and the pressure roller is rotatably connected to the pressure roller frame through bearings. The pressure roller is located on the die plate. Multiple internal resistance fluctuation point structures are provided on the inner wall of the upper box. The internal resistance fluctuation point structure includes a through hole opened on the lower inner wall of the upper box. A guide sleeve is fixedly connected to the inner wall around the through hole. A contact is slidably inserted in the guide sleeve. The inner end of the contact is spherical, and the contact is located near the center height of the pressure roller shaft. When the pressure roller rotates, it interferes with the contact. A steel strip is attached to the through hole on the outer wall of the upper box. The lower end of the steel strip is fixedly connected to the middle box or the lower end of the upper box and the upper end are fixedly connected to the upper part of the through hole on the upper box. When there is no interference between the pressure roller and the contact, the outer end of the contact does not exert force on the steel strip.
[0005] Furthermore, the upper end of the steel strip is fixedly connected to the upper half of the upper box body at its height.
[0006] Furthermore, a rubber bushing is fixedly connected to the inner wall of the guide sleeve.
[0007] Furthermore, the lower end of the steel strip is fixedly connected to the arc-shaped fixing block. The lower end of the steel strip is welded to the arc-shaped fixing block and then wrapped around it multiple times. The arc-shaped fixing block has connection holes at both ends, and screw holes corresponding to the connection holes are opened on the middle box. The arc-shaped fixing block is fixedly connected to the screw holes by bolts passing through the connection holes.
[0008] Furthermore, the steel strip is multi-layered.
[0009] The positive and beneficial technical effects of this utility model are: the structure is durable and effective, as detailed in the specific implementation method. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the present invention.
[0011] Figure 2 This is an enlarged schematic diagram of the contact point of this utility model.
[0012] Figure 3 This is a schematic diagram of an arc-shaped fixing block. Detailed Implementation
[0013] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.
[0014] This utility model is a partial improvement and optimization of the elastic upper box part disclosed in Chinese patent CN111450775A. The structure of the flat die pellet mill involved in this application can refer to the technical solution of that patent.
[0015] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: upper box; 2: steel strip; 3: mold plate; 4: pressure roller; 5: middle box; 6: contact; 7: rubber bushing; 8: guide sleeve; 9: arc-shaped fixing block; 10: connecting hole.
[0016] As shown in the attached diagram, the flat die pellet mill has an internal resistance fluctuation point structure on its elastic upper housing. The flat die pellet mill includes a die plate 3, an upper housing 1, and a middle housing 5. The upper housing is an integral cylindrical structure made of rolled steel plate. The upper housing 1 is fixedly connected to the middle housing 5, the die plate is supported on the middle housing, the pressure roller frame is fixedly connected to the main shaft, and the pressure roller 4 is rotatably connected to the pressure roller frame via bearings. The pressure roller is located on the die plate. Multiple internal resistance fluctuation point structures are provided on the inner wall of the upper housing. Each internal resistance fluctuation point structure includes a through hole on the lower inner wall of the upper housing. A guide sleeve 8 is fixedly connected to the inner wall around the through hole. A rubber bushing 7 is fixedly connected to the inner wall of the guide sleeve. A contact 6 slides through the rubber bushing 7. The inner end of the contact 6 is spherical. Figure 2 As shown, Figure 2The state shown is the state before the pressure roller drives the contact 6 during rotation. After the pressure roller drives the contact 6, the contact 6 moves horizontally outward along the guide sleeve to apply pressure to the steel strip. The steel strip pulls the upper box body to deform or vibrate, achieving the purpose of removing sticky material and breaking arches. The contact is located near the center height of the pressure roller shaft. When the pressure roller rotates, it interferes with the contact. A steel strip 2 is attached to the through hole on the outer wall of the upper box body. The steel strip is multi-layered, which can increase durability. The lower end of the steel strip is fixedly connected to the middle box body, or the lower end and upper end of the upper box body are fixedly connected to the upper part of the through hole on the upper box body. When there is no interference between the pressure roller and the contact, the outer end of the contact does not exert force on the steel strip. In this embodiment, the upper end of the steel strip is fixedly connected to the upper half of the upper housing, and the lower end of the steel strip is fixedly connected to the arc-shaped fixing block 9. The lower end of the steel strip is welded to the arc-shaped fixing block and then wrapped around it multiple times. Connecting holes 10 are provided at both ends of the arc-shaped fixing block, and screw holes corresponding to the connecting holes are provided on the middle housing. The arc-shaped fixing block is fixedly connected to the screw holes by bolts passing through the connecting holes. There are various ways to fix the upper end of the steel strip to the upper housing. For example, there are various steel strip fixing clips available in existing products. The steel strip fixing clips can be welded to the upper housing to fix the upper end of the steel strip, or the upper end of the steel strip can be directly welded to the upper housing to achieve a fixed connection.
[0017] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.
Claims
1. A structure for internal resistance fluctuation points on the elastic upper housing of a flat die pellet mill, wherein the flat die pellet mill includes a die plate, an upper housing, and a middle housing, the upper housing being an integral cylindrical structure made of rolled steel plate, the upper housing being fixedly connected to the middle housing, the die plate being supported on the middle housing, the pressure roller frame being fixedly connected to the main shaft, and the pressure roller being rotatably connected to the pressure roller frame via bearings, the pressure roller being located on the die plate, characterized in that: Multiple internal resistance fluctuation point structures are provided on the inner wall of the upper box. The internal resistance fluctuation point structure includes a through hole opened on the lower inner wall of the upper box, and a guide sleeve fixedly connected to the inner wall around the through hole. A contact is slidably inserted in the guide sleeve. The inner end of the contact is spherical. The contact is located near the center height of the pressure roller shaft. When the pressure roller rotates, it interferes with the contact. A steel strip is attached to the through hole on the outer wall of the upper box. The lower end of the steel strip is fixedly connected to the middle box, or the lower end of the upper box and the upper end are fixedly connected to the upper part of the through hole on the upper box. When there is no interference between the pressure roller and the contact, the outer end of the contact does not exert force on the steel strip.
2. The internal resistance fluctuation point structure on the elastic upper housing of the flat die pellet mill according to claim 1, characterized in that: The upper end of the steel strip is fixedly connected to the upper half of the upper box body.
3. The internal resistance fluctuation point structure on the elastic upper housing of the flat die pellet mill according to claim 1, characterized in that: A rubber bushing is fixedly connected to the inner wall of the guide sleeve.
4. The internal resistance fluctuation point structure on the elastic upper housing of the flat die pellet mill according to claim 1, characterized in that: The lower end of the steel strip is fixedly connected to the arc-shaped fixing block. The lower end of the steel strip is welded to the arc-shaped fixing block and then wrapped around it multiple times. The arc-shaped fixing block has connection holes at both ends. The middle box has screw holes corresponding to the connection holes. The arc-shaped fixing block is fixedly connected to the screw holes by bolts passing through the connection holes.
5. The internal resistance fluctuation point structure on the elastic upper housing of the flat die pellet mill according to claim 1, characterized in that: The steel strip is multi-layered.