Vibrating screen composite screen lower cross beam main beam body and manufacturing method

Abstract

The invention relates to a main beam body of a composite under-screen cross beam of a vibrating screen and a manufacturing method, which are characterized in that two same U-shaped bodies are buckled up and down and are compositely welded with a flat plate body arranged at an inner interface to form a composite rectangular beam body shaped like a Chinese character'ri '. By the adoption of the composite under-sieve cross beam main beam body of the vibrating screen and the manufacturing method, the length and performance of an existing under-sieve cross beam can be greatly improved, machining is convenient, the service life is prolonged, the under-sieve cross beam used for a large or super-large vibrating screen is supported, and the composite under-sieve cross beam main beam body of the vibrating screen and the manufacturing method of the composite under-sieve cross beam main beam body are brand new.

Description

Technical Field

[0001] The invention relates to a vibrating screen under-screen cross beam and a processing method thereof, in particular to a vibrating screen composite screen under-screen cross beam main beam body and a manufacturing method thereof. Background Art

[0002] At present, the main beams of the under-screen crossbeams of vibrating screens at home and abroad are mostly made of round tubes, square tubes, rectangular tubes, I-beams, etc., and rectangular tubes are mostly used for vibrating screens with a screen width greater than 4600mm. The world's widest vibrating screen (the width reached 5100mm for the first time) exhibited at the National Coal Chemical Industry Exhibition in 2015 adopted large rectangular tube beams. For this type of large rectangular tube beams, in practice, there are shortcomings such as slightly poor bending resistance, high processing requirements, and a service life not as long as that of small beams. When the width of the vibrating screen is further increased, the performance parameters of the main beam of this type of beam cannot be adapted. In order to solve the above problems, a main beam body of the under-screen crossbeam of a composite vibrating screen and a manufacturing method are invented. Summary of the invention

[0003] The purpose of the present invention is to provide a main beam body of a lower cross beam of a composite vibrating screen which has better performance, is easy to process, has a longer service life and is simple to maintain, and a manufacturing method thereof.

[0004] The technical solution of the present invention is summarized as follows:

[0005] The main beam body of the lower crossbeam of the composite screen of the vibrating screen of the present invention is composed of two identical U-shaped bodies and a flat plate body. The two U-shaped bodies are of equal length and have welding crevices on the outer sides of the opening ends. The flat plate body is of equal length to the U-shaped body and is a flat plate of equal width and thickness. The width of the flat plate body is equal to the inner width of the U-shaped body. The openings of the two U-shaped bodies are opposite to each other, one above and one below horizontally buckled, and the flat plate body is horizontally placed in the interface. The joint of the two U-shaped bodies is in the middle of the flat plate body. In the thickness direction of the flat plate body, half of it contacts the opening of the upper U-shaped body, and the other half contacts the opening of the lower U-shaped body. The left and right joints formed by the upper and lower U-shaped body welding grooves and the contact part of the flat plate body are respectively connected and fixed by welding. The weld is uniform along the axial direction. After compounding, the U-shaped body and the flat plate body form a Japanese-shaped composite rectangular beam body.

[0006] The main beam body of the lower cross beam of the vibrating screen composite screen of the present invention, wherein the height of the U-shaped body is between one half and one of the width, including both ends.

[0007] The main beam body of the lower cross beam of the composite screen of the vibrating screen of the present invention, wherein the wall thickness of the U-shaped body is equal and is between 8 mm and 20 mm.

[0008] The main beam body of the lower cross beam of the vibrating screen composite screen of the present invention, wherein the thickness of the flat plate body is between 10 mm and 18 mm.

[0009] In the main beam body of the lower cross beam of the composite screen of the vibrating screen of the present invention, the U-shaped body and the flat plate body can be made of different materials.

[0010] The manufacturing method of the main beam body of the lower cross beam of the vibrating screen composite screen of the present invention comprises the following steps:

[0011] a. Bend the flat plate into a specified U-shape;

[0012] b. Make a welding groove on the outside of the U-shaped opening;

[0013] c. Prepare the corresponding flat plate according to the same regulations;

[0014] d. The U-shaped body and the flat plate are combined and welded according to the requirements of the invention;

[0015] e. Heat treatment is performed on the welded composite screen beam to eliminate welding stress;

[0016] f. Reshape the main beam of the composite screen underbeam after welding.

[0017] The manufacturing method of the lower cross beam main beam body of the vibrating screen composite screen of the present invention, wherein step a of the method is changed to use a prepared standard U-shaped body.

[0018] The manufacturing method of the main beam body of the lower cross beam of the vibrating screen composite screen of the present invention adopts a special auxiliary device to assist positioning and welding in step d of the method.

[0019] The present invention provides a method for manufacturing a main beam body of a lower cross beam of a vibrating screen composite screen, wherein a special device is used in step f of the method to shape the composite beam.

[0020] Compared with the prior art, the present invention fully demonstrates the following advantages:

[0021] (1) Using composite structures instead of single structures greatly improves performance;

[0022] (2) Processing and manufacturing are more convenient and reliable;

[0023] (3) Longer service life, the screen width is expected to exceed 6m-9m.

[0024] The use of the main beam body and manufacturing method of the composite under-screen cross beam of the vibrating screen of the present invention can greatly improve the length and performance of the existing under-screen cross beam, and is easy to process and has a longer service life, thereby providing support for the under-screen cross beam used in large or super-large vibrating screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram showing the cross section of the main beam under the composite screen

[0026] Figure 2 Schematic diagram of the structure of a large vibrating screen

[0027] In the figure:

[0028] 1. Upper U-shaped body, 2. Lower U-shaped body, 3. Flat plate body, 4. Left weld seam, 5. Right weld seam

[0029] 6. Cross beam under the screen Specific implementation manners

[0030] For the vibrating screen composite cross beam main body and its manufacturing method of the present invention, the following will be further described in conjunction with some embodiments:

[0031] Embodiment 1, in conjunction with the attached Figure 1 attached Figure 2 , taking carbon steel as an example for the materials used in this embodiment, the parameters such as strength and stiffness required for the vibrating screen composite cross beam main body of the present invention are matched with the size of the vibrating screen used. It is designed and calculated according to the conventional design method. The materials used can be traditional national standard ordinary carbon steel, European standard carbon steel, or other ordinary carbon steels, alloy steels, or stainless steels with different domestic and foreign standards. The connection between the cross beam under the screen and the vibrating screen body uses traditional well-known technologies. The end plates at both ends of the cross beam under the screen connected to the vibrating screen side plates, as well as the reinforcing ribs and other auxiliary devices on the cross beam under the screen, are also traditional well-known technologies. The protection, use connection holes, and connection methods of the cross beam under the screen are also traditional well-known technologies, which will not be elaborated one by one here. The characteristics of the present invention are that the main body of the cross beam under the screen is composed of two identical U-shaped bodies 1 and 2, and a flat plate body 3 in a composite manner. The two upper U-shaped bodies 1 and lower U-shaped bodies 2 are of equal length, and welding grooves of traditional technologies are provided on the outer sides of the open ends. The flat plate body 3 is of the same length as the upper U-shaped body 1 and the lower U-shaped body 2, and the flat plate body 3 is a flat plate with equal width and equal thickness. The width of the flat plate body 3 is equal to the inner width of the upper U-shaped body 1 and the lower U-shaped body 2. The upper U-shaped body 1 and the lower U-shaped body 2 have their openings facing each other, with 1 on the top and 2 on the bottom in a horizontal butted state. The flat plate body 3 is horizontally placed inside the interface formed by the butting. The seams of the upper U-shaped body 1 and the lower U-shaped body 2 are at the middle position of the flat plate body 3. The upper half of the flat plate body 3 in the thickness direction contacts the inner wall of the opening of the upper U-shaped body 1, and the lower half contacts the inner wall of the opening of the lower U-shaped body 2. The left and right two seams 4 and 5 formed by the contact parts of the welding grooves of the upper and lower U-shaped bodies with the flat plate body 3 are respectively connected and fixed by existing welding methods. The weld seams are continuous and uniform along the direction. After the combination, the upper U-shaped body 1, the lower U-shaped body 2, and the flat plate body 3 form a rectangular composite beam body in the shape of a Chinese character 'Ri', that is, the composite cross beam main body under the screen. According to traditional well-known technologies, end plates and reinforcing ribs are welded at both ends of the composite cross beam main body under the screen to form the cross beam 6 under the vibrating screen.

[0032] Based on the same principle and method, the present invention provides a vibrating screen composite screen lower crossbeam main beam body, wherein the height of the U-shaped body is between one-half and two-half of the width, including both ends, which can achieve the same purpose and effect of the invention.

[0033] Based on the same principle and method, the present invention provides a vibrating screen composite screen lower crossbeam main beam body, wherein the wall thickness of the U-shaped bodies 1 and 2 is equal, ranging from 8 mm to 20 mm, which can achieve the same invention purpose and effect.

[0034] According to the same principle and method, a vibrating screen composite screen lower cross beam main beam body of the present invention, wherein the thickness of the flat plate body 3 is between 10 mm and 18 mm, can achieve the same purpose and effect of the invention.

[0035] Based on the same principle and method, the present invention provides a vibrating screen composite screen lower crossbeam main beam body, wherein the upper U-shaped body 1, the lower U-shaped body 2 and the flat plate body 3 can be made of different materials, which can further optimize the performance and achieve the same invention purpose and effect.

[0036] Based on the same principle and method, the present invention provides a vibrating screen composite screen lower crossbeam main beam body, wherein there is a 1mm to 3mm gap between the upper U-shaped body 1 and the lower U-shaped body 2, which is conducive to the three-body welding connection, improves the welding performance, and can achieve the same invention purpose and effect.

[0037] Embodiment 2, the present invention is a method for manufacturing a main beam of a lower cross beam of a vibrating screen composite screen according to the above claims, characterized in that the method comprises the following steps:

[0038] a. Bend the flat plate into the specified upper U-shaped body 1 and lower U-shaped body 2;

[0039] b. Weld the outer sides of the opening ends of the upper U-shaped body 1 and the lower U-shaped body 2 with a welding groove;

[0040] c. Prepare the corresponding flat plate 3 according to the same regulations;

[0041] d. The upper U-shaped body 1, the lower U-shaped body 2 and the flat plate body 3 are combined and welded according to the requirements of the invention;

[0042] e. Heat treatment is performed on the welded composite screen beam to eliminate welding stress;

[0043] f. Reshape the main beam of the composite screen underbeam after welding.

[0044] Based on the same principle and method, the present invention realizes a method for manufacturing the main beam of the lower cross beam of a vibrating screen composite screen according to the above claims, wherein step a of the method is replaced with a prepared standard U-shaped body, including standard steel sections, etc., which can also achieve the same purpose and effect of the invention.

[0045] According to the same principle and method, the present invention realizes the main beam manufacturing method of the lower cross beam of a vibrating screen composite screen according to the above claims, wherein in step d of the method, a special auxiliary device is used to help positioning and welding, and the special auxiliary device can be a horizontal bracket that is twice as wide as the height of the U-shaped body, and the material used can be the traditional national standard ordinary carbon steel, or European standard carbon steel, or other ordinary carbon steel, alloy steel or stainless steel of different domestic and foreign standards, etc., and a clamping device is installed on it at appropriate intervals, and a walking automatic welding machine is set next to it, and the walking track of the welding machine is kept parallel to the bracket. When welding, the two assembled U-shaped bodies are rotated 90° so that one side of the seam faces upward, and are placed horizontally on the bracket, and clamped with a clamping device, and the welding position of the automatic welding machine is adjusted to weld, and after welding one side, the other side is turned upward, and the same method is used for welding to make the main beam of the lower cross beam of the vibrating screen composite screen, which increases the accuracy and improves the effectiveness, and can also achieve the same invention purpose and effect.

[0046] According to the same principle and method, the present invention realizes a method for manufacturing the main beam of the lower cross beam of a vibrating screen composite screen according to the above claims, wherein a special device is used in step f of the method to shape the composite beam, and the special shaping device can be a right-angle platform made of a horizontal plate and a vertical plate, the length of the horizontal plate and the vertical plate should be greater than the length of the main beam of the lower cross beam of the composite screen, the width of the horizontal plate and the vertical plate should be greater than the width and height of the main beam of the lower cross beam of the composite screen, respectively, the thickness of the horizontal plate and the vertical plate should be greater than 30mm, and the material used can be the traditional national standard ordinary carbon steel, or the European standard carbon steel. Steel can also be other ordinary carbon steel, alloy steel or stainless steel of different domestic and international standards. The horizontal plate and the vertical plate are extended in the direction of right angles and fixed. During shaping, the main beam of the crossbeam under the composite screen is placed on a right-angle platform so that two adjacent surfaces of the main beam are in contact with the two surfaces of the right-angle platform. The other two surfaces can be pressurized by a jack or a press so that the two surfaces in contact with the crossbeam and the right-angle platform are completely fitted together. The pressure is maintained for a certain period of time. The crossbeam can also be heated while maintaining the pressure, thereby speeding up the shaping speed, increasing the accuracy and improving the efficiency, and achieving the same purpose and effect of the invention.

[0047] The present invention discloses a main beam body of a vibrating screen composite screen lower crossbeam and a manufacturing method. Although a few embodiments are listed above, for ordinary technicians in this field, certain improvements, replacements, etc. made to the present invention, or any combination changes of the above-mentioned implementation methods, all fall within the protection scope of the present invention.

Claims

1. A vibrating screen composite screen lower cross beam main beam body of the present invention is characterized by: The main beam body is composed of two identical U-shaped bodies and a flat plate body. The two U-shaped bodies are of equal length and have welding grooves on the outer sides of the opening ends. The flat plate body is of equal length to the U-shaped body and is a flat plate of equal width and thickness. The width of the flat plate body is equal to the inner width of the U-shaped body. The openings of the two U-shaped bodies are opposite to each other, one above and one below horizontally buckled, and the flat plate body is horizontally placed in the interface. The joint of the two U-shaped bodies is in the middle of the flat plate body. In the thickness direction of the flat plate body, half of it contacts the opening of the upper U-shaped body, and the other half contacts the opening of the lower U-shaped body. The left and right joints formed by the upper and lower U-shaped body welding crevices and the contact part of the flat plate body are respectively connected and fixed by welding methods. The weld is uniform along the axial direction. After compounding, the U-shaped body and the flat plate body form a Japanese-shaped composite rectangular beam body.

2. The main beam body of the lower cross beam of the vibrating screen composite screen according to claim 1, characterized in that: The height of the U-shaped body is between one-half and two-half of the width, inclusive.

3. The main beam body of the lower cross beam of the vibrating screen composite screen according to claim 1, characterized in that: The wall thickness of the U-shaped body is equal and is between 8 mm and 20 mm.

4. The main beam body of the lower cross beam of the vibrating screen composite screen according to claim 1, characterized in that: The thickness of the flat plate is between 10 mm and 18 mm.

5. The main beam body of the lower cross beam of the composite vibrating screen according to claim 1, characterized in that: The U-shaped body and the flat plate body are made of different materials.

6. The main beam body of the lower cross beam of the vibrating screen composite screen according to claim 1, characterized in that: There is a gap of 1 mm to 3 mm between the U-shaped bodies.

7. A method for manufacturing a main beam of a lower cross beam of a vibrating screen composite screen according to the above claims, characterized in that The method comprises the following steps: a. Bend the flat plate into a specified U-shape; b. Make a welding groove on the outside of the U-shaped opening; c. Prepare the corresponding flat plate according to the same regulations; d. The U-shaped body and the flat plate are combined and welded according to the requirements of the invention; e. Heat treatment is performed on the welded composite screen beam to eliminate welding stress; f. Shape the composite screen beam after heat treatment.

8. A method for manufacturing a main beam of a lower cross beam of a vibrating screen composite screen according to claim 7, characterized in that The method a step uses a prepared standard U-shaped body instead.

9. A method for manufacturing a main beam of a lower cross beam of a vibrating screen composite screen according to claim 7, characterized in that In step d of the method, a special auxiliary device is used to assist positioning and welding.

10. A method for manufacturing a main beam of a lower cross beam of a vibrating screen composite screen according to claim 7, characterized in that In step f of the method, a special device is used to reshape the composite beam.

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