Spiral for horizontal screen sedimentation centrifuge using detachable spiral blades

Abstract

The utility model discloses a spiral for a horizontal screen sedimentation centrifuge using detachable spiral blades, which comprises a spiral barrel body and the spiral blades, the spiral blades comprise long blades and short blades, the long blades in the spiral blades are detachably arranged on the outer wall of the spiral barrel body, and the short blades are welded on the outer wall of the spiral barrel body. The detachable blades are made of specific materials and are manufactured through a specific process, and the spiral structure is constructed through cooperation of the detachable blades and the short blades. The spiral blade installed on the outer wall of the spiral barrel body further comprises a cladding layer of the spiral blade, a base material of the spiral blade and an installation hole of the spiral blade. According to the utility model, the problems of extremely high maintenance cost, complicated maintenance process, long time consumption and the like of an integral screw are solved, the downtime and the maintenance cost of equipment are reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal separation technical field, and concretely relates to a spiral for horizontal screen mesh sedimentation centrifuge using detachable spiral blade. BACKGROUND

[0002] The detachable spiral blade is widely applied in many industries, mainly including the following aspects: metallurgical industry, agricultural industry, environmental protection industry, chemical and food industry, electric power industry, grain processing industry, forestry, food processing industry and the like.

[0003] The horizontal screen mesh sedimentation centrifuge is widely applied in many industries such as chemical industry, mining industry and environmental protection, and the spiral part plays a key role in conveying and separating materials. The traditional centrifuge spiral adopts a whole structure, and has many drawbacks. Once the spiral blade is worn, damaged or needs to be replaced to adapt to different material characteristics, the maintenance cost of the whole spiral is extremely high, and the maintenance process is complex and time-consuming, and the whole spiral often needs to be disassembled from the centrifuge for long time repair or replacement, which greatly affects the production efficiency, increases the downtime of the equipment and maintenance cost. In addition, the wear resistance of the traditional spiral blade is limited, and when processing some high-hardness and strong-corrosion materials, rapid wear is prone to occur, which shortens the service life of the spiral and further affects the reliability and stability of the whole centrifuge. SUMMARY

[0004] Based on the technical problems existing in the prior art, the utility model provides a spiral for horizontal screen mesh sedimentation centrifuge using detachable spiral blade, which solves the problems of high maintenance cost and complex maintenance process in the prior art.

[0005] According to the technical scheme of the utility model, the utility model provides a spiral for horizontal screen mesh sedimentation centrifuge using detachable spiral blade, which comprises a spiral barrel body and a spiral blade, the spiral blade comprises long blades and short blades, the long blades in the spiral blade are detachably mounted on the outer wall of the spiral barrel body, and the short blades are welded on the outer wall of the spiral barrel body.

[0006] Preferably, the spiral blade mounted on the outer wall of the spiral barrel body further comprises a cladding layer of the spiral blade, a base material of the spiral blade and a mounting hole of the spiral blade.

[0007] Preferably, the short blades are welded on the outer wall of the spiral barrel body through the mounting hole of the spiral blade, and reinforcing nails for reinforcing welding are arranged in the mounting hole of the short blades.

[0008] Preferably, the short blades are connected with the base material of the spiral blade through bolts.

[0009] Further, the base material of the spiral blade is connected with the cladding layer of the spiral blade, and the base material of the spiral blade provides an adhering base surface for the cladding layer of the spiral blade.

[0010] Further, the angle between the spiral barrel and the main body of the base material of the detachable spiral blade is alpha, and alpha is any angle between 100° and 120°. The angle between the long blade and the short blade is 0°.

[0011] Preferably, the material of the spiral blade is made of metal, plastic or composite material.

[0012] Preferably, the diameter of the spiral blade is usually between 200 mm and 2000 mm.

[0013] More preferably, the blade shape of the spiral blade is a curved arc, and the helical angle of the spiral blade is between 15° and 45°.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] 1. Convenient maintenance and replacement: the utility model adopts the design of detachable spiral blades. When the blades are worn, damaged or need to be replaced according to the characteristics of the materials, the entire spiral does not need to be disassembled, and only the damaged or replaced blades need to be disassembled, treated or replaced with new blades. Through the connection mode of the hinge hole bolt and the lock nut, the firmness and reliability of the blade installation are ensured, and the disassembly operation is facilitated. This greatly shortens the maintenance time, reduces the maintenance cost and reduces the impact of equipment downtime on production.

[0016] 2. Excellent wear resistance and corrosion resistance: the detachable blades are made of NM400 material and are cladded with tungsten carbide on the surface. NM400 itself has high strength and certain wear resistance, and the tungsten carbide cladding layer further improves the hardness and wear resistance of the blade, and the hardness can reach above HRC55. When processing high-hardness and corrosive materials, the blades can effectively resist the erosion, wear and corrosion of the materials, prolonging the service life of the blades. According to actual tests, compared with the traditional blades without tungsten carbide cladding, the service life of the blades of the utility model can be prolonged by 3-5 times, thereby improving the reliability and stability of the entire centrifugal machine and reducing the equipment failure and maintenance frequency caused by blade wear.

[0017] 3. High-precision machining and assembly: From numerical control cutting to final on-site installation, a variety of high-precision machining methods and detection equipment are used in the entire manufacturing process. For example, numerical control cutting ensures the initial accuracy of the blade, reaming process improves the accuracy of the mounting hole, three-coordinate measuring instrument performs accurate measurement, and special processing tooling ensures the positional accuracy of the blade during machining and assembly. These measures ensure the precise fit of the detachable blade and the outer wall of the spiral barrel, allowing the spiral to work stably and efficiently during operation, improving the conveying and separation efficiency of the material, and ensuring the stability of the product quality. At the same time, high-precision machining and assembly also help to reduce vibration and noise during equipment operation, reduce equipment wear and energy consumption, and prolong the overall service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a cross-sectional structure diagram of the detachable spiral blade of the utility model.

[0019] Figure 2 is a spiral diagram of a horizontal screen mesh sedimentation centrifuge using a detachable spiral blade of the utility model.

[0020] Explanation of reference numerals in the drawings:

[0021] 1, spiral barrel body; 2, short blade; 3, cladding layer of spiral blade; 4, base material of spiral blade; 5, mounting hole of spiral blade; 6, long blade. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] In addition, it also needs to be explained that only parts related to the utility model are shown in the drawings for convenience of description. In the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0024] It should be noted that the concepts of "first", "second" and the like mentioned in the utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modification of "one" and "multiple" mentioned in the utility model is illustrative rather than restrictive, and those skilled in the art should understand that unless explicitly indicated in the context, it should be understood as "one or more".

[0026] The utility model provides a kind of spiral for horizontal screen mesh sedimentation centrifuge using detachable spiral blade, it includes spiral barrel body 1 and spiral blade, spiral blade includes long blade and short blade, long blade in spiral blade is detachably installed on the outer wall of spiral barrel body 1, and short blade 2 is welded on the outer wall of spiral barrel body 1.Long blade is made of special material and process, and the construction of spiral structure is realized by cooperation with short blade 2.

[0027] The spiral blade mounted on the outer wall of the spiral barrel body 1 further comprises a cladding layer 3 of the spiral blade, a base material 4 of the spiral blade, and a mounting hole 5 of the spiral blade.

[0028] Please refer to Figure 1 The spiral for horizontal screen mesh sedimentation centrifuge using detachable spiral blade comprises a spiral barrel body 1, a short blade 2, a cladding layer 3 of the spiral blade, a base material 4 of the spiral blade, a mounting hole 5 of the spiral blade, and a long blade 6.

[0029] The spiral barrel body 1 provides a stable support frame for the entire spiral structure, ensuring the integrity and stability of the structure during high-speed operation of the centrifuge, and bearing the huge centrifugal force, material impact, and dynamic load generated by its own rotation. The spiral barrel body determines the approximate flow space and path range of the material inside the spiral, guides the material to move along the spiral trajectory, and enables the material to undergo an orderly settling, separating, and conveying process in the enclosed space of the spiral barrel body. This is a key spatial limiting component for realizing material solid-liquid separation.

[0030] The short blade 2 serves as a connecting bridge between the detachable spiral blade and the spiral barrel body 1. The short blade is firmly attached to the outer wall of the spiral barrel body 1 through welding, providing a precise positioning reference and stable mounting basis for the detachable spiral blade. This ensures that the detachable spiral blade is evenly distributed in a spiral shape on the spiral barrel body 1 and is accurately installed. During the conveying process of the material, the short blade 2 cooperates with the detachable spiral blade. The short blade 2 shares part of the force from the material acting on the spiral, effectively reducing the stress concentration degree of the detachable spiral blade, thereby ensuring the smooth operation and durability of the entire spiral material pushing system, and improving the efficiency and stability of material conveying.

[0031] The melting layer 3 of the spiral blade can effectively resist the scraping, cutting and impact wear of the material particles on the surface of the blade, significantly reduce the loss of the surface material of the blade, greatly prolong the service life of the blade, reduce the equipment maintenance cost and downtime, and is especially suitable for the centrifuge spiral blade for processing high-hardness ores, sandstones and other materials in the fields of mining and building materials. The melting layer 3 of the spiral blade can be used as a protective barrier to effectively block the direct contact between the corrosive medium and the blade substrate, prevent the performance degradation and structural damage of the substrate caused by chemical corrosion, and ensure that the blade can maintain good working performance and structural stability in the corrosive environment.

[0032] The substrate 4 of the spiral blade constitutes the main structure of the detachable spiral blade, gives the blade basic shape and structural strength, so that it can withstand various complex loads in the material conveying process, including impact force, friction force, centrifugal force and additional force caused by vibration, etc., ensures that the blade will not easily deform, break and other failure phenomena in the high-strength working environment, and maintains the structural integrity and functional reliability of the blade. The melting layer 3 of the spiral blade provides a good adhesion matrix. By properly pretreating the surface of the substrate, the melting layer 3 of the spiral blade can be tightly combined with the substrate 4 of the spiral blade to form a firm overall structure, so as to fully exert the wear resistance, corrosion resistance and other performance advantages of the melting layer, and realize the comprehensive improvement of the performance of the blade.

[0033] The mounting hole 5 of the spiral blade realizes the accurate connection and positioning between the detachable spiral blade and the short blade 2. The position and size accuracy of the mounting hole 5 of the spiral blade directly relates to the installation accuracy and stability of the detachable spiral blade on the spiral barrel 1. Through cooperation with the bolt, the mounting hole 5 of the spiral blade can firmly fix the detachable spiral blade on the short blade 2, so that the blade will not be loose, displaced or fallen off during the high-speed rotation of the centrifuge, ensuring the integrity and reliability of the spiral structure and maintaining the stable operation of the material conveying and separation process.

[0034] The long blade 6 is connected with the melting layer 3 of the spiral blade, and the long blade 6 is firmly attached to the melting layer 3 of the spiral blade by welding.

[0035] As a connecting bridge between the detachable spiral blade and the spiral barrel 1, the short blade 2 is firmly attached to the outer wall of the spiral barrel 1 by welding, providing a precise positioning reference and a stable mounting basis for the detachable spiral blade, ensuring that the detachable spiral blade is evenly distributed in a spiral shape on the spiral barrel 1 and is accurately installed. In the conveying process of the material, the short blade 2 cooperates with the detachable spiral blade. The short blade 2 shares part of the force from the material acting on the spiral, effectively reducing the stress concentration degree of the detachable spiral blade, thereby ensuring the stable operation and durability of the entire spiral material pushing system, improving the efficiency and stability of material conveying.

[0036] As shown in Figures 1-2 The short blade 2 is connected to the spiral barrel 1 and is welded to the outer wall of the spiral barrel 1 through the mounting hole 5 of the spiral blade. Reinforcing nails are arranged in the mounting hole of the short blade for reinforcing welding. This connection method makes the short blade 2 become an extended structure of the spiral barrel 1, providing a solid support basis and positioning reference for the detachable spiral blade. The spiral barrel 1 transmits rotary power to the detachable spiral blade through the short blade 2, enabling the detachable spiral blade to rotate around the shaft under the drive of the spiral barrel 1. At the same time, the short blade 2 and the spiral barrel 1 jointly bear various forces generated during the conveying process of the material, ensuring the stability and reliability of the entire spiral structure under high-speed rotation and material action.

[0037] The short blade 2 is connected to the base material 4 of the spiral blade through bolts. The bolt connection ensures reliable connection between the detachable spiral blade and the short blade 2, facilitating installation and removal of the detachable spiral blade, and effectively transmitting torque and bearing axial force, radial force, etc. during the operation of the centrifugal machine. The short blade 2 transmits the rotary motion of the spiral barrel 1 to the base material 4 of the spiral blade through the bolts, enabling the detachable spiral blade to rotate synchronously with the spiral barrel 1 and achieving the pushing effect on the material. At the same time, the bolt connection can buffer the impact of the material on the blade to some extent, reducing the risk of blade damage caused by rigid connection, and enabling quick and convenient operation when the blade needs to be repaired or replaced, thereby reducing equipment maintenance difficulty and cost.

[0038] The base material 4 of the spiral blade is connected with the cladding layer 3 of the spiral blade, and the base material 4 of the spiral blade provides an adhered basic surface for the cladding layer 3 of the spiral blade. Through a special laser cladding process, the cladding layer 3 of the spiral blade and the base material 4 of the spiral blade form a metallurgical or mechanical bond to become a whole. This connection makes the detachable spiral blade have the structural strength of the base material and the special properties such as wear resistance and corrosion resistance of the cladding layer. In the working process, the base material 4 of the spiral blade supports the cladding layer 3 of the spiral blade to bear the action of the material, and the cladding layer 3 of the spiral blade protects the base material 4 of the spiral blade from wear and corrosion. The two cooperate with each other to improve the service life and working performance of the detachable spiral blade, and ensure that the spiral can stably and efficiently complete the material conveying and separating task under complex working conditions.

[0039] The embodiment of the application is a horizontal screen settling centrifuge with a detachable spiral blade, which comprises a spiral barrel 1 welded with a short blade 2 and a detachable spiral blade. The diameter of the detachable spiral blade is usually between 200 mm and 2000 mm; the pitch of the detachable spiral blade is between 60 mm and 3000 mm; the material of the detachable spiral blade is made of metal, plastic or composite material, and in this embodiment, high-strength wear-resistant steel plate is used. Further, the detachable spiral blade is made of NM400 material and is coated with tungsten carbide on the surface.

[0040] The blade shape of the detachable spiral blade is curved and arc-shaped, and the helix angle of the detachable spiral blade is between 15° and 45°. The angle between the spiral barrel 1 and the main body of the base material 4 of the spiral blade is α, and α is any angle between 100° and 120°. In a preferred embodiment, the angle α between the spiral barrel 1 and the base material 4 of the spiral blade is any angle between 105° and 115°. In another preferred embodiment, the angle α between the spiral barrel 1 and the base material 4 of the spiral blade is 105°, 110° or 115°. The angle between the long blade 6 and the short blade 2 is 0°.

[0041] A manufacturing method of a horizontal screen settling centrifuge with a detachable spiral blade comprises the following steps:

[0042] Step S1: According to the design requirements, set the size parameters of the detachable blade on the numerical control blanking equipment, and perform numerical control blanking operation to obtain a blade blank;

[0043] Step S2: Place the blank blade on a special molding machine, and press according to the pitch and inclination requirements of different parts to obtain four types of blades;

[0044] Step S3: Drill and install holes on the pressed blade, use reaming process to ensure the accuracy of the holes, and then use special processing tooling to install the blade on the short blade 2 of the outer wall of the spiral barrel 1.

[0045] Step S4: The blade installed on the tool is subjected to external turning processing to remove excess material and make the external diameter meet the requirements;

[0046] Step S5: Laser cladding process is used to clad tungsten carbide on the surface of the blade, and the operation is performed according to the requirements of 3mm on the front surface, 1mm on the back surface and 2mm on the external diameter, and the process parameters are controlled to ensure the cladding quality;

[0047] Step S6: The external grinding processing is performed on the whole blade after cladding to further improve the external diameter precision and surface quality, so as to meet the design standard;

[0048] Step S7: The three-coordinate measuring instrument is used to comprehensively measure the blade to check various precision indexes, and adjustment or correction is performed if there is any unqualified part;

[0049] Step S8: The measured qualified blade is detached from the tool for tempering heat treatment to increase the hardness and remove the stress;

[0050] Step S9: The weight balancing operation is performed on the three blades in one group after tempering to ensure the dynamic balance of the blade after being installed to the screw barrel;

[0051] Step S10: The blade after weight balancing is subjected to paint brushing treatment to achieve the protection and aesthetic purposes;

[0052] Step S11: The blade after paint brushing is delivered to the use site, and the blade is installed to the short blade of the screw barrel through the hinge hole bolt and metal insert check nut at the site, and the front surface is welded using the tungsten carbide wear-resistant welding wire at the joint of the blade, the assembly of the screw is completed, and finally the screw is installed in the horizontal screen mesh sedimentation centrifuge for production.

[0053] A detachable screw blade manufacturing process of a horizontal screen mesh sedimentation centrifuge screw includes the following steps:

[0054] Step W1: Numerical control blanking, in the preferred embodiment, NM400 material is selected, and the numerical control blanking equipment is used to accurately cut the detachable blade blank, the thickness of the blade is set to 16mm, and each lead is cut according to 3 pieces, so as to ensure the size precision and shape consistency of the blade, and provide a good foundation for subsequent processing. The blanking tolerance is controlled within a small range to ensure the interchangeability and installation precision of the blades.

[0055] Step W2: Pressing pitch and inclination, a special press is used to process the detachable blade, and according to the requirements of different parts of the screw, a total of 4 kinds of blades are pressed, including 1 kind of straight section, 2 kinds of taper section and 1 kind of screen section. The pitch and inclination of the blade are accurately controlled so that the blade can form a precise screw pushing structure with the outer wall of the screw barrel after installation, meeting the smooth conveying and separation requirements of the material in different areas.

[0056] Step W3: Install to the tooling and drill mounting hole (reaming), design a special installation tooling, which is exactly the same size as the outer wall of the screw barrel and the short blade, which can effectively fix the position of the detachable blade during installation, ensuring the accuracy and efficiency of installation. Through the tooling, the blade is initially installed on the short blade, and the pressed blade is operated for drilling mounting hole. The installation hole adopts reaming process to improve the size accuracy and surface finish of the hole, and ensure the accurate matching of the installation hole and the corresponding hole position on the outer wall of the screw barrel and the short blade.

[0057] Step W4: Turn the outside circle, turn the outside circle of the detachable blade installed on the tooling to remove excess material, so that the outside circle of the blade reaches the required size accuracy, and the surface roughness meets the assembly standard, providing a good surface foundation for the subsequent tungsten carbide cladding process.

[0058] Step W5: Tungsten carbide cladding, in this embodiment, advanced laser cladding process is used to clad tungsten carbide on the surface of the detachable blade. The cladding thickness on the front surface is 3mm, the back surface is 1mm, and the outside circle is 2mm. During the cladding process, the process parameters are strictly controlled to ensure that the tungsten carbide cladding layer is tightly combined with the blade base material, free of cracks, pores and other defects, the cladding layer hardness is > HRC55, which significantly improves the wear resistance, corrosion resistance and service life of the blade.

[0059] Step W6: Whole grinding outside circle, after tungsten carbide cladding, the detachable blade installed on the tooling is subjected to whole grinding outside circle processing, further improving the surface precision and coaxiality of the screw outside circle, so that the screw cooperates more accurately with other parts during rotation, ensuring the stability and reliability of the screw running in the centrifuge.

[0060] Step W7: Three coordinate measuring instrument measurement, use three coordinate measuring instrument to accurately measure the processed detachable blade, comprehensively detect the size accuracy, shape accuracy and installation hole accuracy of the blade and other parameters, ensure that the blade meets the design requirements and assembly standards. Any deviation or defect found in the measurement is corrected or adjusted in time to ensure the quality and performance of the blade.

[0061] Step W8: Disassembly, tempering heat treatment and counterweight, disassemble the measured qualified detachable blade from the tooling, and perform tempering heat treatment. Through tempering treatment, the hardness of the blade cladding surface is increased and the stress is effectively removed, improving the comprehensive mechanical properties of the blade. After tempering, the detachable blade is counterweighted in a group of 3 pieces per circle to ensure the dynamic balance performance of the screw after reinstallation, reducing vibration and noise during equipment operation.

[0062] Step W9: paint, after the weight of the detachable blade paint treatment, the blade surface protection, to prevent rust and other damage in the process of storage and transportation, but also to some extent, improve the appearance quality of the blade.

[0063] Step W10: field installation and welding, the painted detachable blade shipment to the use of the field, in the field through the hinge hole bolt and metal insert lock nut installation to the short blade of the screw barrel 3 pieces of a group of detachable blade. Finally, in the joint between the blade and the blade using tungsten carbide wear-resistant welding wire welding front, form a continuous spiral push surface, complete the assembly of the screw, the screw can be put into production.

[0064] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A screw for a horizontal screen bowl decanter centrifuge using detachable helical blades, characterized by, It includes a spiral barrel (1) and spiral blades, the spiral blades include long blades and short blades, the long blades in the spiral blades are detachably installed on the outer wall of the spiral barrel (1), and the short blades (2) are welded on the outer wall of the spiral barrel (1).

2. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, characterized in that, The spiral blades installed on the outer wall of the spiral barrel (1) further include a cladding layer (3) of the spiral blades, a base material (4) of the spiral blades and a mounting hole (5) of the spiral blades.

3. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 2, characterized in that, The short blades (2) are welded on the outer wall of the spiral barrel (1) through the mounting hole (5) of the spiral blades, and reinforcing nails for reinforcing welding are arranged in the mounting hole of the short blades.

4. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 3, characterized in that, The short blades (2) are connected with the base material (4) of the spiral blades through bolts.

5. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 4, characterized in that, The base material (4) of the spiral blades is connected with the cladding layer (3) of the spiral blades, and the base material (4) of the spiral blades provides an adhering basic surface for the cladding layer (3) of the spiral blades.

6. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, wherein The spiral barrel (1) and the main body of the detachable base material (4) of the spiral blades form an included angle α, and the angle α is any angle between 100° and 120°.

7. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, characterized in that, The included angle between the long blades (6) and the short blades (2) is 0°.

8. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, wherein The material of the spiral blades is made of metal, plastic or composite material.

9. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, characterized in that, The diameter of the spiral blades ranges from 200mm to 2000mm.

10. The screw for horizontal screen bowl decanter centrifuge using detachable helical blade according to claim 1, characterized in that, The blade shape of the spiral blades is a curved arc shape, and the helix angle of the spiral blades is between 15° and 45°.

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