Bar screening device

Abstract

The utility model discloses a bar screening device, relates to the technical field of screening, and provides the bar screening device which limits the bending amplitude of bars through a supporting block, prevents stress concentration, effectively improves the problem that the bars are prone to breakage, and further improves the screening efficiency. Metal contact between the bars and the cross beam is isolated through the linings, rapid abrasion under high-frequency vibration when metal makes direct contact is avoided, meanwhile, it is guaranteed that the bars can be independently replaced through the design, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screening, in particular to a rod screening device. Background Art

[0002] Existing bar screens are widely used in applications requiring high impact, high hardness, and high wear resistance, such as fine crushing and screening of iron ore, screening of raw and raw cement clinker for building materials, grading of raw coal, and screening of sand and gravel for hydropower plants. The high-frequency tuning fork bars of these screens generate high-frequency resonance through the vibration of the screen, promoting material forward movement, accelerating the sinking of particles on the screen and the lateral movement of small particles along the screen gaps, thereby increasing the probability of them passing through the sieve apertures.

[0003] However, a prominent problem with rod screens is that the rods are prone to wear and tear. In existing technology, the rods are typically cast together with the polyurethane frame. If a rod breaks, the entire screen needs to be replaced, resulting in long replacement cycles and high costs, affecting equipment continuity and production efficiency. Utility Model Content

[0004] The purpose of the present invention is: in response to the above-mentioned problems, the present invention provides a rod screening device, which limits the bending amplitude of the rods through the support blocks, prevents stress concentration, and effectively improves the problem of easy breakage of the rods. In addition, the metal contact between the rods and the crossbeams is isolated by the bushings, avoiding rapid wear under high-frequency vibration when the metal is in direct contact with the metal. At the same time, this design ensures that the rods can be replaced independently, reducing maintenance costs.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A rod screening device comprises a frame and rods, wherein the frame comprises two horizontal beams, two longitudinal beams and at least one middle support plate which are relatively spaced apart, the two longitudinal beams being arranged between the two horizontal beams, and the two horizontal beams and the two longitudinal beams together form a frame structure; the horizontal beams are provided with mounting holes at intervals along the length direction, the two ends of the rods in the length direction are respectively assembled in the mounting holes of the corresponding horizontal beams, a plurality of rods are arranged side by side to form a screen surface, and adjacent rods are spaced apart to form a screen gap; the two ends of the middle support plate in the length direction are respectively connected to the corresponding longitudinal beams, the middle support plates are spaced apart below the screen surface, the middle support plates are provided with support blocks corresponding to the rods, one end of the support blocks is connected to the middle of the rod, and the other end is connected to the middle support plate.

[0007] Furthermore, the number of the support blocks corresponds to the number of the rods, and the top of the support block is fixedly connected to the bottom of the rod.

[0008] Furthermore, the width of the support block is smaller than the diameter of the rod.

[0009] Furthermore, the top of the support block is provided with an arc-shaped area matching the bottom of the rod.

[0010] Furthermore, a friction-reducing bushing is provided between the rod and the mounting hole, and the rod and the friction-reducing bushing, as well as the friction-reducing bushing and the mounting hole are bonded together by adhesive.

[0011] Furthermore, the friction-reducing bushing is made of nylon.

[0012] Furthermore, the middle support plate is provided with a groove matching the support block, and the bottom of the support block is inserted into the groove.

[0013] Furthermore, the support block and the rod, and the support block and the middle support plate are bonded together by adhesive.

[0014] Furthermore, the rod is made of spring steel wire.

[0015] Furthermore, the support block is made of a non-metallic material having a hardness lower than that of the rod.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The utility model uses bushings to isolate the beam and the rods to avoid direct contact between metals, thereby reducing rapid wear under high-frequency vibration. At the same time, this design ensures that the rods can be replaced independently, reducing maintenance costs.

[0018] 2. The support block of the present invention provides support for the middle part of the rod to resist the inertial force of the screen plate during high-frequency vibration, avoid excessive bending of the rod, and reduce stress concentration.

[0019] 3. The width of the support block of the utility model is smaller than the diameter of the rod. This design will not reduce the screen gap area between adjacent rods and will not hinder the passage of materials.

[0020] 4. The support block of the utility model is arranged below the rods, which does not affect the passage of materials. The upper semicircular arcs of two adjacent rods form a funnel shape, which increases the passability of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the utility model rod screening device;

[0022] Figure 2 This utility model is about Figure 1 Cross-sectional view of the rod screening device in the AA direction;

[0023] Figure 3 This utility model is about Figure 2 A partial magnified view of the middle X area;

[0024] Figure 4 This utility model is about Figure 1 Cross-sectional view of the bar screening device in the middle BB direction;

[0025] Figure 5 This utility model is about Figure 4 A partial enlarged view of the middle Y region.

[0026] Markings in the figure: 1-frame, 101-middle support plate, 2-support block, 3-bushing, 4-rod, 5-adhesive. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Example 1

[0030] A rod 4 screening device, such as Figure 1-5 As shown, it includes a frame 1 and rods 4, the frame 1 includes two horizontal beams, two longitudinal beams and a middle support plate 101 arranged relatively at intervals, the two longitudinal beams are arranged between the two horizontal beams, and the two horizontal beams and the two longitudinal beams together form a frame structure; the horizontal beams are provided with mounting holes at intervals along the length direction, the two ends of the rods 4 in the length direction are respectively assembled in the mounting holes of the corresponding horizontal beams, a number of rods 4 are arranged side by side to form a screen surface, and two adjacent rods 4 are spaced apart to form a screen gap; the two ends of the middle support plate 101 in the length direction are respectively connected to the corresponding longitudinal beams, the middle support plate 101 is arranged at intervals below the screen surface, and the middle support plate 101 is provided with support blocks 2 corresponding to the rods 4, one end of the support block 2 is connected to the middle of the rod 4, and the other end is connected to the middle support plate 101. In this embodiment, the support block 2 is located in the middle of the rod 4. Of course, multiple groups of support blocks 2 can be set along the length direction of the rod 4 for use according to actual needs. The support spacing between two adjacent support blocks 2 and between the support block 2 and the beam is 150-250mm.

[0031] The number of the support blocks 2 corresponds to the number of rods 4, and the top of the support block 2 is fixedly connected to the bottom of the rod 4. The support block 2 does not affect the passage of materials under the rod 4, and does not form a funnel shape on the upper semicircular arc of two adjacent rods 4, thereby increasing the material passability.

[0032] The width of the support block 2 is smaller than the diameter of the rod 4 .

[0033] The top of the support block 2 is provided with an arc-shaped area matching the bottom of the rod 4 .

[0034] A friction-reducing bushing 3 is provided between the rod 4 and the mounting hole. Adhesive 5 is used to bond the rod 4 and the bushing 3, as well as the bushing 3 and the mounting hole. The adhesive 5 is high-strength cast adhesive. If the rod 4 is damaged, the ends of the rod 4 and bushing 3 can be struck from the mounting hole to break the high-strength cast adhesive and remove them from the mounting hole. A new rod 4 and bushing 3 can then be inserted into the mounting hole and bonded together with high-strength cast adhesive to complete the replacement of the rod 4.

[0035] The friction-reducing bushing 3 is made of nylon to prevent rapid wear under high-frequency vibration when metal contacts metal directly. Preferably, the nylon selected is MC wear-resistant nylon.

[0036] The middle support plate 101 is provided with a groove matching the support block 2 , and the bottom of the support block 2 is inserted into the groove.

[0037] The support block 2 and the rod 4, and the support block 2 and the middle support plate 101 are bonded together by adhesive 5. The adhesive 5 is a high-strength casting adhesive.

[0038] The rod 4 is made of medium-strength, high-fatigue spring steel wire.

[0039] The support block 2 is made of a non-metallic material having a hardness lower than that of the rod 4 .

[0040] The width of the sieve slots ranges from 1mm to 5mm. In this embodiment, 3mm is preferred. Compared to conventional round or square hole sieves, this achieves a higher porosity (porosity = sieve width / rod diameter). For example, using 4mm Φ rods 4 and 4mm sieve slots, the porosity can reach 50%. Conventional round or square hole sieves, on the other hand, require support around the entire perimeter of the holes, resulting in a lower porosity.

[0041] This document 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. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0043] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A bar screening device, comprising a frame and bars, characterized in that: The frame includes two horizontal beams, two longitudinal beams and at least one middle support plate that are relatively spaced apart. The two longitudinal beams are arranged between the two horizontal beams, and the two horizontal beams and the two longitudinal beams together form a frame structure; the horizontal beams are provided with mounting holes at intervals along the length direction, and the two ends of the rods in the length direction are respectively assembled in the mounting holes of the corresponding horizontal beams. Several rods are arranged side by side to form a screen surface, and adjacent rods are spaced apart to form a screen gap; the two ends of the middle support plate in the length direction are respectively connected to the corresponding longitudinal beams, and the middle support plate is spaced apart below the screen surface. The middle support plate is provided with support blocks corresponding to the rods, and one end of the support block is connected to the middle of the rod, and the other end is connected to the middle support plate.

2. The rod screening device according to claim 1, characterized in that: The number of the support blocks corresponds to the number of the rods, and the tops of the support blocks are fixedly connected to the bottoms of the rods.

3. The rod screening device according to claim 2, characterized in that: The width of the support block is smaller than the diameter of the rod.

4. The rod screening device according to claim 2, characterized in that: The top of the support block is provided with an arc-shaped area matching the bottom of the rod.

5. The rod screening device according to claim 1, characterized in that: A friction-reducing bushing is provided between the rod and the mounting hole. The rod and the friction-reducing bushing, and the friction-reducing bushing and the mounting hole are bonded together by adhesive.

6. The rod screening device according to claim 5, characterized in that: The friction-reducing bushing is made of nylon.

7. The rod screening device according to claim 1, characterized in that: The middle support plate is provided with a groove matching the support block, and the bottom of the support block is inserted into the groove.

8. The rod screening device according to claim 1, characterized in that: The support block and the rod, and the support block and the middle support plate are all bonded by adhesive.

9. The rod screening device according to claim 1, characterized in that: The rod is made of spring steel wire.

10. The rod screening device according to claim 1, characterized in that: The support block is made of a non-metallic material with a hardness lower than that of the rod.

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