Sealing structure for roller extrusion sealing and extruding machine
By setting a combined structure of arc-shaped sealing plate and fixed plate above the roll, the problem of poor sealing at both ends of the roll is solved, and long-term sealing is achieved, material leakage and replacement frequency of sealing plates are reduced, production efficiency is improved and material loss is reduced.
Patent Information
- Application Number
- CN202422498174.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The existing granulation extruder lacks effective sealing on both ends of the roll, resulting in serious material leakage, affecting production efficiency and forming rate, and the sealing plates are frequently worn and replaced, increasing material losses.
Arc-shaped sealing plate is arranged above the roll. The inner surface of the sealing plate is located on the inside of the end surface of the roll, the outer surface is close to the end surface of the roll, and a gap is left between the arc wall surface and the circumferential surface of the roll, and is fixed to the frame through the fixing plate to form an isoarc waist triangular structure to avoid wear of the sealing plate and the end surface of the roll.
Improve the sealing effect, reduce material leakage, reduce material return volume, improve production efficiency, extend the service life of the sealing plate, and reduce material loss.
Smart Images
Figure CN223190991U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of extruder equipment, in particular to a sealing structure for roller extrusion sealing and an extruder. Background Art
[0002] Currently, the rollers on existing granulation extruders in China are generally not equipped with sealing devices at both ends, resulting in serious material leakage from both ends of the pressure rollers during the extrusion process. One solution known to the inventors is to install steel plates shaped like "ping-pong boards" on both sides of the bottom of the forced feeding bin above the rollers. The inner surface of the steel plates is simultaneously in contact with the side end faces of the two rollers to achieve a seal at both ends of the rollers. In actual use, it was found that the steel plates can achieve a sealing effect in the early stage, but after long-term use, the friction between the steel plates and the roller end faces will cause the steel plates to gradually wear out, resulting in a gap between the steel plates and the roller end faces. It is easy for fine-grained extrusion materials (such as potassium sulfate powder) to leak through this gap. In addition, the material will also exert a certain extrusion force on the steel plates on both sides, further increasing this gap. Under the influence of the above two aspects, more and more material is lost through the gap between the roller end faces and the steel plates without being squeezed by the roller extrusion surface, causing the extruder forming rate to continue to decline, which in turn leads to an increasing load on the subsequent production equipment and even an increasing amount of return material in the entire granulation production system. Frequent replacement of steel plates will not only increase product investment, but also reduce work efficiency.
[0003] Therefore, it is necessary to design a new sealing structure to solve the above technical problems. Utility Model Content
[0004] The purpose of the utility model is to provide a sealing structure and an extruder for roller extrusion sealing, so as to solve the problems existing in the above-mentioned prior art, significantly improve the sealing effect, avoid large-scale leakage of materials, reduce the amount of returned materials in the granulation production system, improve production efficiency, and at the same time reduce the replacement frequency of the sealing plate and reduce material loss.
[0005] To achieve the above purpose, the present invention provides the following solutions:
[0006] A sealing structure for roller extrusion sealing includes a sealing plate, which is arranged above two rollers. In the axial direction of the rollers, the inner surface of the sealing plate is located on the inner side of the end face of the roller, and the outer surface of the sealing plate is arranged close to the end face of the roller; in the arrangement direction of the two rollers, both wall surfaces of the sealing plate are arc-shaped, and the arc shape is adapted to the circular shape of the roller, and there is a gap between the arc-shaped wall surface and the circumferential surface of the roller.
[0007] As one embodiment, the sealing plate is an isosceles waist triangle structure, the two waistlines of the isosceles waist triangle structure are arc-shaped, and the tips formed by the two waistlines are close to the extrusion positions of the two rollers; the two waistlines of the isosceles triangle are changed into arcs with equal curvature, concave inward and symmetrical along the perpendicular bisector of the base of the isosceles triangle, thereby obtaining an isosceles waist triangle.
[0008] As one embodiment, it also includes a fixed plate, which is fixed on the frame on which the rolling rollers are installed. The fixed plate is located on both sides of the two rolling rollers, and there is a gap between the inner surface of the fixed plate and the end surface of the rolling rollers. The sealing plate is fixed on the inner side of the fixed plate.
[0009] As one embodiment, the fixing plate is in the shape of a table tennis board.
[0010] As an embodiment, the center lines of the sealing plate and the fixing plate coincide with each other.
[0011] As an embodiment, a first through hole is provided on the top of the fixing plate, and the first through hole is used for passing a bolt to fix the frame.
[0012] As an embodiment, the fixing plate is connected to the sealing plate by bolts.
[0013] As one embodiment, a gap between the arc-shaped wall surface and the circumferential surface of the roller is 3 mm to 5 mm.
[0014] As one embodiment, a gap between the fixing plate and the end surface of the roller is 2 mm to 5 mm.
[0015] The utility model also provides an extruder, comprising the above-mentioned sealing structure for roller extrusion sealing.
[0016] Compared with the prior art, the present invention has the following technical effects:
[0017] The utility model provides a sealing plate above the roller to directly seal the leakage points at both ends of the roller. Compared with the method of installing steel plates on both sides of the roller for sealing, the sealing plate above the roller avoids the problem of wear between the sealing plate and the roller end surface, and has a better sealing effect on both ends of the roller, which can achieve a long-term seal. Therefore, the sealing structure of the utility model can significantly improve the sealing effect, avoid large-scale material leakage, reduce the amount of returned material in the granulation production system, and improve production efficiency. At the same time, it can also reduce the replacement frequency of the sealing plate and reduce material loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a schematic diagram of a sealing structure in one embodiment of the present invention;
[0020] Figure 2 for Figure 1 Schematic diagram after removing the fixed plate;
[0021] Figure 3 This is a schematic diagram of the matching structure of the sealing plate and the fixing plate in one embodiment of the present utility model;
[0022] Figure 4 This is a schematic diagram of the installation structure of the sealing plate and the fixing plate in one embodiment of the present invention;
[0023] Figure 5 This is a structural diagram of an extruder in one embodiment of the present invention;
[0024] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of area A in the middle;
[0025] Figure 7 for Figure 5 Side view of;
[0026] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of the middle area B;
[0027] Description of reference numerals:
[0028] 1. Sealing plate; 2. Roller; 3. Fixed plate; 4. Forced feeding bin; 5. First through hole; 6. Second through hole; 7. Receiving bin. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0030] The purpose of the utility model is to provide a sealing structure and an extruder for roller extrusion sealing, so as to solve the problems existing in the prior art, significantly improve the sealing effect, avoid large-scale leakage of materials, reduce the amount of returned materials in the granulation production system, improve production efficiency, and at the same time reduce the replacement frequency of the sealing plate and reduce material loss.
[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0032] Example 1:
[0033] like Figures 1 to 4 As shown, this embodiment is a sealing structure for roller extrusion sealing, comprising a sealing plate 1, which is arranged above two rollers 2 and can be fixed on the frame where the rollers 2 are located. In the axial direction of the rollers 2, the inner surface of the sealing plate 1 is located on the inner side of the end face of the roller 2 and has a certain distance from the end face of the roller 2; the outer surface of the sealing plate 1 is arranged close to the end face of the roller 2, and can be on the inner side of the end face of the roller 2 or on the outer side of the end face of the roller 2, so that the sealing plate 1 is arranged as a whole near the end face of the roller 2 to avoid the sealing plate 1 affecting the blanking. In the arrangement direction of the two rollers 2, that is, in the direction of the center line connecting the two rollers 2, the two wall surfaces of the sealing plate 1 are both arc-shaped, and the arc shape is adapted to the circular shape of the roller 2. There is a gap between the arc-shaped wall surface and the circumferential surface of the roller 2 to avoid wear between the sealing plate 1 and the roller 2.
[0034] This embodiment provides a sealing plate 1 above the roller 2, which can directly seal the leakage positions at both ends of the roller 2. Compared with the method of providing steel plates on both sides of the roller 2 for sealing, providing the sealing plate 1 above the roller 2 avoids the problem of wear between the sealing plate 1 and the end faces of the roller 2, and has a better sealing effect on both ends of the roller 2. Even if the material squeezes the sealing plate 1 to both sides (the axial direction of the roller 2), as long as the squeezing force is not enough to squeeze the inner surface of the sealing plate 1 to the outside of the end face of the roller 2, the sealing effect of the sealing plate 1 will not be greatly affected, and long-term sealing can still be achieved. Therefore, the sealing structure in this embodiment can significantly improve the sealing effect, avoid large-scale leakage of materials, reduce the amount of returned materials in the granulation production system, and improve production efficiency. At the same time, it can also reduce the replacement frequency of the sealing plate 1 and reduce material loss.
[0035] Although there is a gap between the arc-shaped wall surface of the sealing plate 1 and the circumferential surface of the roller 2, which will cause a certain amount of leakage, the leakage is very small compared to the method of setting steel plates at both ends of the roller 2, and this gap will not change significantly under the lateral extrusion of the material, which meets the use requirements.
[0036] As one embodiment, the gap between the arc-shaped wall surface and the circumferential surface of the roller 2 is 3 mm to 5 mm.
[0037] like Figure 1 As shown, the sealing plate 1 is an isosceles triangle structure. The two waistlines of the isosceles triangle structure are arc-shaped, and the tip formed by the two waistlines is close to the extrusion position of the two rollers 2. The isosceles triangle described in this embodiment is a deformation of the isosceles triangle. The two waistlines of the isosceles triangle are changed to have equal curvature, are concave inward, and are symmetrical along the perpendicular bisector of the base of the isosceles triangle. The curvature of the two waistlines of the isosceles triangle is adapted to the circular shape of the rollers 2. The tip of the isosceles triangle structure extends between the two rollers 2 and is located close to the extrusion position of the two rollers 2 to ensure the largest possible sealing area. The base of the isosceles triangle structure (the top edge in actual settings) should be located above the maximum height of the material accumulation between the two rollers 2. As an example, the length × height of the isosceles triangle structure is 420 × 200 mm, the thickness is 2 mm to 5 mm, and the arc diameter of the two waistlines is Φ435.5 mm.
[0038] However, in actual operation, it was found that although it is feasible to directly fix the sealing plate 1 on the frame, there is a problem of inconvenient fixing. In order to facilitate the fixing of the sealing plate 1 and further improve the sealing effect, the sealing structure in this embodiment also includes a fixed plate 3, the area of the fixed plate 3 is larger than the sealing plate 1, and the top of the fixed plate 3 is fixed on the frame where the roller 2 is installed. The fixed plate 3 is located on both sides of the two rollers 2, and there is a gap between the inner surface of the fixed plate 3 and the end face of the roller 2, and this gap is 2mm to 5mm; the sealing plate 1 is fixed on the inner side of the fixed plate 3. Although there is a gap between the fixed plate 3 and the end face of the roller 2, material leakage may occur, but the gap formed between the fixed plate 3, the sealing plate 1 and the roller 2 is bent, which can also improve the sealing effect to a certain extent. At the same time, the fixed plate 3 is located on the outside of the sealing plate 1, which is more convenient to fix on the frame. Usually, the top of the fixed plate 3 is fixed on both sides of the bottom of the force feeding bin 4.
[0039] As a fixing method, a first through hole 5 is provided on the top of the fixing plate 3 , and the first through hole 5 is used for passing a bolt to fix the connection frame.
[0040] To facilitate replacement of the fixing plate 3 or sealing plate 1, the fixing plate 3 and sealing plate 1 are connected in a removable manner. As a connection method, a second through-hole is provided in the center of the fixing plate 3, and a third through-hole 6 is provided in the sealing plate 1. The second through-hole and the third through-hole 6 are aligned and then secured with bolts. The second through-hole can be an internally threaded hole with a diameter of 12 mm.
[0041] As an embodiment, the fixing plate 3 is in the shape of a table tennis board. The table tennis board shape in this embodiment refers to the shape of the area of a conventional table tennis board that is not covered by the rubber, such as Figure 2 shown.
[0042] As an embodiment, the center lines of the sealing plate 1 and the fixing plate 3 coincide with each other, resulting in a more regular shape and a more beautiful appearance.
[0043] After nearly three years of use in the factory, it has been verified that this sealing structure has reliable performance and can ensure the continuous and stable extrusion efficiency of the extruder. In addition, the sealing plate 1 was only replaced once after two years of use, which effectively solved the problem of frequent wear and replacement due to design defects of the original sealing form that affects production efficiency.
[0044] Example 2:
[0045] like Figures 5 to 8 As shown, this embodiment provides an extruder, including the sealing structure for extrusion sealing of the roller 2 in Example 1. The extruder also includes the roller 2, a forced feed bin 4, a receiving bin 7, and other structures. The fixed plates 3 in the sealing structure are fixed to both sides of the bottom of the forced feed bin 4. The forced feed bin 4, the roller 2, and the receiving bin 7 are arranged on the frame of the extruder in order from top to bottom.
[0046] Adaptive changes based on actual needs are all within the protection scope of this utility model.
[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.
Claims
1. A sealing structure for roller squeeze sealing, characterized in that: It includes a sealing plate, which is arranged above the two rollers. In the axial direction of the rollers, the inner surface of the sealing plate is located on the inner side of the end face of the roller, and the outer surface of the sealing plate is arranged close to the end face of the roller; in the arrangement direction of the two rollers, the two wall surfaces of the sealing plate are both arc-shaped, and the arc shape is adapted to the circular shape of the roller, and there is a gap between the arc-shaped wall surface and the circumferential surface of the roller.
2. The sealing structure for roller squeeze sealing according to claim 1, characterized in that: The sealing plate is an isosceles waist triangle structure, and the two waistlines of the isosceles waist triangle structure are arc-shaped, and the tips formed by the two waistlines are close to the extrusion positions of the two rollers; the two waistlines of the isosceles triangle are changed into arcs with equal curvature, concave inward and symmetrical along the perpendicular bisector of the base of the isosceles triangle, thereby obtaining an isosceles waist triangle.
3. The sealing structure for roller squeeze sealing according to claim 1, characterized in that: It also includes a fixed plate, which is fixed on the frame where the rollers are installed. The fixed plate is located on both sides of the two rollers. There is a gap between the inner surface of the fixed plate and the end surface of the rollers. The sealing plate is fixed on the inner side of the fixed plate.
4. The sealing structure for roller squeeze sealing according to claim 3, characterized in that: The fixing plate is in the shape of a table tennis board.
5. The sealing structure for roller squeeze sealing according to claim 3 or 4, characterized in that: The sealing plate and the fixing plate have center lines that coincide with each other.
6. The sealing structure for roller squeeze sealing according to claim 3 or 4, characterized in that: A first through hole is provided on the top of the fixing plate, and the first through hole is used for passing a bolt to fix the frame.
7. The sealing structure for roller squeeze sealing according to claim 3 or 4, characterized in that: The fixing plate is connected to the sealing plate by bolts.
8. The sealing structure for roller squeeze sealing according to claim 1, characterized in that: The gap between the arc-shaped wall surface and the circumferential surface of the roller is 3 mm to 5 mm.
9. The sealing structure for roller squeeze sealing according to claim 3, characterized in that: The gap between the fixing plate and the end surface of the roller is 2 mm to 5 mm.
10. An extruder, characterized in that: The invention comprises a sealing structure for roller extrusion sealing according to any one of claims 1 to 9.