Dust cover of pulverizer
By designing a dust-proof cover of the crusher with an annular cover, the problem that the dust-proof cover inside the crusher does not play a dust-proof role is solved, and the timely diversion of materials and prevent discoloration is achieved, reducing the cost of the crusher and Economic losses of enterprises.
Patent Information
- Application Number
- CN202420250202.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The original dustproof cover of the filler box in the internal structure of the crusher did not play a dustproof role, causing particulate materials to enter the cover body at high speed, friction between the rotating shaft and the end surface of the filler box to produce high temperature, making the material turn yellow, causing more than 30 tons of daily Energy consumption loss.
A dust-proof cover of a crusher is designed, including an annular cover body, with chamfered at the bottom edge of the cover body and positioning holes on the circumferential surface. The cover is made of 304 stainless steel, with an outer diameter of 298 mm, an inner diameter of 250 mm, a thickness of 35 mm, a surface roughness of Ra1.6, and a chamfer at the bottom designed to facilitate timely flow of materials.
Effectively prevent materials from aggregating and discoloring in the cover body, reduce the cost of using the crusher, reduce the economic losses of the company, and improve the operating efficiency of the crusher.
Smart Images
Figure CN222470170U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pulverizing equipment, and specifically relates to a dust cover for a pulverizer. Background Art
[0002] A pulverizer is a machine that crushes large solid raw materials into required sizes.
[0003] According to the size of the crushed or crushed materials, the crusher can be divided into coarse crusher, pulverizer, and ultrafine pulverizer. There are four external forces applied to the solid during the pulverization process: shearing, impact, rolling, and grinding. Shearing is mainly used in coarse crushing (crushing) and pulverization operations, and is suitable for crushing or pulverizing tough or fibrous materials and large blocks; impact is mainly used in pulverization operations, suitable for pulverizing brittle materials; rolling is mainly used in high-fineness pulverization (ultrafine pulverization) operations, suitable for ultrafine pulverization of most materials; grinding is mainly used for ultrafine pulverization or ultra-large pulverization equipment, suitable for further pulverization after pulverization. The actual pulverization process often involves several external forces acting at the same time, but high-end pulverizers are tailored to the pulverization environment.
[0004] The German Czech Lin grinder is an imported equipment specially designed for the chemical industry to produce ultra-fine powder. Whether its structural mode is reasonable will have an important impact on the particle size of the product material.
[0005] However, unqualified yellow material began to be produced soon after the unit was put into operation in 2014. After four years of continuous optimization and research by technical forces from all parties, there was no result.
[0006] The main reason was that the original stuffing box dust cover in the internal structure of the unit did not play a dust-proof role. The granular material entered the cover at high speed, and the friction between the rotating shaft and the end face of the stuffing box generated high temperature, causing the material to turn yellow. The daily energy consumption and material consumption losses reached more than 30 tons, and the economic losses were even more serious. Innovation and improvement were imminent. Summary of the invention
[0007] In order to solve the technical problem that the original dust cover of the stuffing box in the internal structure of the unit fails to prevent dust, the granular materials enter the cover at high speed, and the friction between the rotating shaft and the end face of the stuffing box generates high temperature, causing the materials to turn yellow, the utility model proposes a dust cover for the pulverizer. It is convenient for timely diversion of materials, effectively prevents materials from gathering in the cover and changing color, reduces the use cost of the pulverizer, and effectively reduces the economic losses of the enterprise.
[0008] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:
[0009] A dust cover for a grinder comprises an annular cover body 1; a chamfer 3 is arranged on the bottom edge of the cover body 1, and a positioning hole 2 is arranged on the circumferential surface of the cover body 1.
[0010] Preferably, the cover body 1 is made of 304 stainless steel.
[0011] Preferably, the cover body 1 has an outer diameter of 298 mm, an inner diameter of 250 mm, and a thickness of 35 mm.
[0012] Preferably, the inclination of the chamfer 3 is 45°.
[0013] Preferably, the depth of the chamfer 3 is 10 mm.
[0014] Preferably, the surface roughness of the cover body 1 is Ra1.6.
[0015] Preferably, the positioning hole is an internal threaded hole.
[0016] Preferably, there are three positioning holes 2.
[0017] Preferably, the angle between adjacent positioning holes 2 is 120 degrees.
[0018] Preferably, the inner diameter of the positioning hole 2 is 12 mm.
[0019] Beneficial effects of the utility model:
[0020] The utility model adopts a plane ring layout, has a simple structure, is easy to install and operate, and is very practical for on-site working conditions. When installed, it is connected to the crusher through the connecting hole, and the connection is firm and stable, and the dust cover can be connected to the crusher very quickly. The bottom edge of the cover body adopts a chamfered design, which is convenient for timely diversion of materials, effectively preventing materials from gathering in the cover body and discoloring, reducing the use cost of the crusher, and effectively reducing the economic losses of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a main schematic diagram of the utility model;
[0023] Figure 2 It is a cross-sectional schematic diagram of the utility model;
[0024] Figure 1 and Figure 2 In the figure, 1-cover, 2-positioning hole, 3-chamfer. DETAILED DESCRIPTION
[0025] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.
[0026] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection.
[0027] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.
[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.
[0030] Depend on Figure 1 and Figure 2As shown, a dust cover for a grinder includes a ring-shaped cover body 1. The symmetry of the ring is very strong. It is a central symmetrical figure with the center of the circle as the center of symmetry, and it is also an axisymmetric figure with countless symmetry axes. The geometric center of the ring is the center of the circle. An inversion with the center of the circle as the center and the radius as the geometric mean of the inner and outer radii keeps the ring unchanged as a whole, interchanges the inner and outer edges, and interchanges the inner circle inside with the outer circle outside. Therefore, the overall strength and rigidity of the cover body 1 are effectively guaranteed, and the structure is very strong. Preferably, the cover body 1 is provided with connecting holes at even intervals around its circumference, and the installation positions of the connecting holes match those on the crusher, effectively ensuring that the cover body 1 can perfectly fit into the crusher after being installed on the crusher. During installation, it is only necessary to use bolts or screws to pass through the connecting holes and then screw them on the crusher to firmly install the cover body 1 on the crusher. The installation and disassembly of the cover body 1 are very convenient. The bottom edge of the cover body 1 is provided with a chamfer 3 to facilitate the timely diversion of materials, effectively prevent the materials from gathering and discoloring in the cover body 1, reduce the use cost of the crusher, and effectively reduce the economic losses of the enterprise.
[0031] Preferably, the cover 1 is made of 304 stainless steel, which is a common material in stainless steel and has a density of 7.93 g / cm 3 ; It is also called 18 / 8 stainless steel in the industry, which means it contains more than 18% chromium and more than 8% nickel; it is resistant to high temperatures of 800℃, has good processing performance and high toughness. Therefore, the structural strength of the cover body 1 made of 304 stainless steel is very high, which can effectively withstand impact and is not easy to deform, ensuring that the cover body 1 can be used for a long time without replacement. At the same time, it ensures that the cover body 1 can eliminate the problems of red water, blue-green water, and hidden water, no odor, no harmful substances precipitate, keep the water pure, lead-free and harmless to human health, ensuring that the material will not be contaminated. 304 stainless steel has excellent wear resistance, effectively ensuring that the surface of the cover body 1 is beautiful, clean, bright, long-lasting, scratch-free, never rusty, and never broken. 304 stainless steel has good low temperature resistance, ensuring that the cover body 1 will never break in a complex environment. 304 stainless steel has good thermal expansion performance and excellent thermal insulation performance, ensuring that the cover body 1 will produce minimal deformation after heating and cooling during processing, ensuring that the cover body 1 can be perfectly installed on the crusher.
[0032] Preferably, the cover body 1 has an outer diameter of 298 mm, an inner diameter of 250 mm, and a thickness of 35 mm, that is, the outer diameter of the cover body 1 is 298 mm, which matches the port of the crusher, ensuring that after the cover body 1 is installed, the outer edge of the cover body 1 is flush with the crusher, ensuring the beauty of the crusher after the cover body 1 is installed; the inner diameter of the cover body 1 is 298 mm, which matches the rotating shaft of the crusher, ensuring that the rotating shaft of the crusher can pass through the cover body 1; the thickness of the cover body 1 is 35 mm. On the premise of effectively ensuring the strength of the cover body 1, the production cost of the cover body 1 is the lowest, effectively reducing the production cost of the cover body 1.
[0033] Preferably, the connecting hole is an internal threaded hole. Compared with the through hole connection, the internal threaded hole can more conveniently connect the cover body 1 to the grinder through bolts and other connecting parts. At the same time, bolts, screws and other connecting parts can be screwed into the internal threaded hole. After the protruding heads of bolts, screws and other connecting parts are damaged, the cover body 1 can still be connected to the grinder through the internal threaded hole, which effectively ensures the stability of the connection between the cover body 1 and the grinder.
[0034] Preferably, the size of the chamfer 3 is 10*45°, that is, the inclination angle of the chamfer 3 is 45 degrees, and the depth of the chamfer 3 is 10 mm. The setting of the chamfer 3 effectively removes the burrs on the cover 1, making the cover 1 more beautiful and effectively improving the overall appearance of the cover 1. At the same time, the chamfer 3 can also reduce stress concentration, strengthen the strength of the parts of the cover 1, effectively improve the overall strength of the cover 1, and increase the service life of the cover 1. In addition, it can also make the assembly of the cover 1 easier, so that the staff can install the cover 1 on the crusher faster and more conveniently, effectively reducing the difficulty of installing the cover 1. Furthermore, the chamfer 3 can also effectively improve the safety of the cover 1. By setting the chamfer 3 on the bottom edge of the cover 1, it can effectively avoid the damage of the sharp angle to the staff and other parts, and effectively improve the safety of the cover.
[0035] Preferably, the surface roughness of the cover body 1 is Ra1.6. Surface roughness refers to the unevenness of the machined surface with small spacing and tiny peaks and valleys [1]. The distance (wave pitch) between two wave crests or two wave valleys is very small (less than 1 mm), which belongs to the microscopic geometric shape error. The smaller the surface roughness, the smoother the surface. Surface roughness is generally formed by the processing method used and other factors, such as the friction between the tool and the part surface during processing, the plastic deformation of the surface metal during chip separation, and the high-frequency vibration in the process system. Due to the differences in processing methods and workpiece materials, the depth, density, shape and texture of the marks left on the machined surface are different. Surface roughness is closely related to the matching properties, wear resistance, fatigue strength, contact stiffness, vibration and noise of mechanical parts, and has an important impact on the service life and reliability of mechanical products.
[0036] Preferably, the connection hole is an internal thread hole, the internal thread thread is not exposed, and is usually located on the side where the rotating fastener is rotated. The bottom of the internal thread groove can be in an arc shape. If the shape of the thread groove bottom is not specified, it can be flattened or rounded during lathing. When in use, the screw is screwed into the threaded hole and continuously tightened until the end of the screw contacts the grinder, thereby firmly connecting the cover body 1 to the grinder.
[0037] Preferably, there are three positioning holes 2, and the cover body 1 is fixed by three screws, which effectively ensures the stability of the installation of the cover body 1.
[0038] Preferably, the angle between adjacent positioning holes 2 is 120 degrees, so that the force on the cover body 1 is more uniform, and the stability of the installation of the cover body 1 is effectively improved.
[0039] Preferably, the inner diameter of the positioning hole 2 is 12 mm, which matches the size of the cover body 1, effectively preventing the side wall of the cover body 1 at the positioning hole 2 from being too thin, resulting in an unstable connection of the cover body 1.
[0040] Replacement process of the utility model: dismantle the unit and lift out the rotor, measure the original installation size and remove the original hidden danger dust cover, redesign and process a new flat annular dust cover, the material is 304 stainless steel, the cover body 1 size is 298 (outer diameter) * 250 (inner diameter) * 35 (thickness), the bottom is designed as a 10*45° chamfer 3, which is convenient for guiding the material to flow out of the dust cover quickly and prevent the material from gathering and discoloring in the cover body 1. The surface roughness is 1.6, and 3-M12 internal threaded holes are evenly distributed in the 120-degree direction of the circumference to fasten the dust cover to the rotating shaft. A safe operating clearance of 4 mm is reserved between the cover body 1 and the end face of the stuffing box.
[0041] Advantages of the utility model:
[0042] 1. The new dust cover is designed as a flat ring layout with a simple structure, easy installation and operation, and is very practical for on-site working conditions.
[0043] 2. The roughness of the cover body 1 is designed to be R1.6, which prevents the dust from adhering to the surface of the cover body 1 and causing resistance due to excessive viscosity of the material.
[0044] 3. A 4mm axial clearance is reserved between the dust cover and the stuffing box, which prevents materials from entering the dust cover and avoids friction between the moving and static parts.
[0045] 4. The lower end surface of the cover body 1 is designed with a 10*45° chamfer 3 to facilitate timely diversion of materials.
[0046] 5. The problem of material accumulation and discoloration of the dust cover has been completely solved, which has achieved higher economic benefits and rapidly improved the market reputation.
[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.
Claims
1. A dust cover for a pulverizer, characterized in that: The dust cover of the grinder comprises an annular cover body (1); the bottom edge of the cover body (1) is provided with a chamfer (3), and a positioning hole (2) is provided on the circumferential surface of the cover body (1).
2. The dust cover for a pulverizer according to claim 1, characterized in that: The cover body (1) is made of 304 stainless steel.
3. The dust cover for a pulverizer according to claim 1, characterized in that: The cover body (1) has an outer diameter of 298 mm, an inner diameter of 250 mm and a thickness of 35 mm.
4. The dust cover for a pulverizer according to claim 1, characterized in that: The inclination of the chamfer (3) is 45°.
5. The dust cover for a pulverizer according to claim 4, characterized in that: The depth of the chamfer (3) is 10 mm.
6. The dust cover for a pulverizer according to claim 1, characterized in that: The surface roughness of the cover body (1) is Ra1.
6.
7. The dust cover for a pulverizer according to claim 1, characterized in that: The positioning hole (2) is an internal threaded hole.
8. The dust cover for a pulverizer according to claim 7, characterized in that: There are three positioning holes (2).
9. The dust cover for a pulverizer according to claim 8, characterized in that: The included angle between adjacent positioning holes (2) is 120 degrees.
10. A dust cover for a pulverizer according to claim 9, characterized in that: The inner diameter of the positioning hole (2) is 12 mm.