Screening device of movable screening machine

Abstract

The utility model discloses a screening device of a movable screening machine, which belongs to the technical field of industrial and mining equipment, and comprises a screening box, the screening box comprises two groups of obliquely arranged screening box side plates, a plurality of groups of reinforcing frameworks are arranged in the screening box side plates, and the reinforcing frameworks are arranged in the screening box side plates. A rear side baffle is arranged on the rear side of the screen box side plate, a bent plate is arranged above the rear side baffle, and a lining plate is obliquely arranged on the front side of the bent plate. The stone blocks are guided to the lining plate through the arc-shaped bent plate on the rear side of the screening box and then guided to the screening net frameworks through the lining plate, so that the situation that the stone blocks directly fall off to impact the first-layer screening net framework of the screening machine is avoided, and the distance between the second-layer screening net framework and the first-layer screening net framework is small; according to the side plate, the impact of large stones on the second-layer screen mesh framework can be effectively reduced, so that the second-layer screen mesh framework is protected, and meanwhile, the strength of the side plate is improved through the multiple sets of reinforcing frameworks.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of industrial and mining equipment, and particularly relates to a screening device of a mobile screening machine. BACKGROUND

[0002] The mobile screening machine is a downstream equipment of a crusher in the field of industrial and mining operation, and is used for receiving ore blocks after being crushed by the crusher. The screening machine plays a vital role in the field of industrial and mining operation. It is not only a continuation of the crushing process, but also a key link for ensuring the quality of final products and production efficiency. The mobile screening machine directly receives ore blocks from the crusher, and uses a vibrating screen to preliminarily classify the materials according to particle size. This can not only effectively separate qualified products, but also return oversized or undersized materials to the crusher for re-crushing, thereby forming a closed loop and improving production efficiency.

[0003] The screening device is a screening mechanism on the screening machine, and is used for sorting stone blocks after being crushed. The ore itself has high weight and hardness, and the screening device itself will bear large vibration and impact during the sorting process. Since the throughput of the screening machine is large, the screening device of the screening machine is always in a high-pressure operation state. The existing screening device has insufficient strength, and often needs to be maintained and repaired to maintain the strength, which seriously increases the production cost and affects the production efficiency. Therefore, the screening device of the mobile screening machine is designed to provide another technical solution for the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a screening device of a mobile screening machine to solve the problems of the existing screening machine in the use process.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a screening device of a mobile screening machine, comprising a screen box, the screen box comprises two groups of screen box side plates arranged obliquely, the inside of the screen box side plate is provided with a plurality of groups of reinforcing skeletons, the rear side of the screen box side plate is provided with a rear baffle, the upper side of the rear baffle is provided with a bending plate, and the front side of the bending plate is provided with a lining plate obliquely.

[0006] The screen box side plate is provided with three groups of screen mesh skeletons of different heights, a plurality of groups of frame beams are arranged in each group of screen mesh skeletons in a cross manner, an edge cover is arranged on both sides of the frame beam, and a plurality of groups of strip plates are arranged on the upper layer of the plurality of groups of frame beams.

[0007] Preferably, the three groups of screen mesh skeletons are arranged in layers, and the spacing between the bottom layer of screen mesh skeletons and the middle layer of screen mesh skeletons is greater than the spacing between the middle layer of screen mesh skeletons and the top layer of screen mesh skeletons.

[0008] Preferably, the lower ends of the three groups of screen frame are correspondingly provided with three groups of material leakage openings, and each group of material leakage opening is externally connected with a group of discharging conveyor belt.

[0009] Preferably, a transmission shaft is arranged through the middle of the screen box, and a side plate motor is arranged on the outer side of the transmission shaft.

[0010] Preferably, a spring seat is arranged on the side plate of each of the two groups of screen boxes, and a damping spring is arranged on the spring seat.

[0011] Preferably, a vibrating screen is arranged on each of the three groups of screen frame, the mesh diameter of the three groups of vibrating screen decreases from large to small, and a silica gel baffle is arranged on the material leakage opening.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] Firstly, the arc-shaped bending plate at the rear side of the screen box guides the stone to the lining plate, and then guides the stone to the screen frame through the lining plate, so that the stone is prevented from directly falling and impacting the first layer of screen frame of the screening machine, the distance between the second layer of screen frame and the first layer of screen frame is small, the impact of the larger stone on the second layer of screen frame can be effectively reduced, the second layer of screen frame is protected, the strength of the side plate is improved through the multiple reinforcing frames, the screen frame is installed through the edge sealing connection, the overall strength of the screen box is effectively improved through the spring seat shock absorption and energy absorption, the maintenance frequency is reduced, and the service life of the screening device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a schematic view of the main structure of the utility model;

[0015] Fig. 2 It is a schematic view of the internal structure of the utility model.

[0016] In the drawing: 1, screen box side plate; 2, reinforcing frame; 3, bending plate; 4, lining plate; 5, screen frame; 6, edge; 7, strip plate; 8, material leakage opening; 9, side plate motor; 10, spring seat; 11, damping spring; 12, rear side baffle. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only 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 fall within the protection scope of the utility model.

[0018] Referring to Figs. 1-2 The screening device of a mobile screening machine comprises a screening box, the screening box comprises two groups of screening box side plates 1 arranged obliquely, the inside of the screening box side plates 1 is provided with a plurality of groups of reinforcing frameworks 2, the rear side of the screening box side plates 1 is provided with a rear baffle 12, the upper side of the rear baffle 12 is provided with a bent plate 3, and the front side of the bent plate 3 is provided with a lining plate 4 obliquely.

[0019] The inside of the screening box side plates 1 is provided with three groups of screen mesh frameworks 5 of different heights, a plurality of groups of frame beams are arranged crosswise in each group of screen mesh frameworks 5, and the two sides of the frame beams are provided with edge seals, and the upper layer of the plurality of groups of frame beams is provided with a plurality of groups of strip plates 7.

[0020] In view of the problem that the strength of the screening device of the existing screening machine is generally in use, and the screening device needs to be frequently maintained in high-strength use, thereby affecting the production and processing efficiency and increasing the production cost, the screening box has two groups of screening box side plates 1, one group of rear baffles 12 and three groups of screen mesh frameworks 5 spliced together, three groups of screen meshes divide the internal space of the screening box into three hopper bodies, and the crushed ore chunks enter the rear and are screened through the three layers of screen mesh frameworks 5, so that the crushed stone blocks are divided according to the particle size and sent out.

[0021] Here, when the stone blocks are sent into the screening box, the arc-shaped bent plate at the rear side of the screening box guides the stone blocks to the lining plate 4, and the stone blocks are guided to the screen mesh framework 5 again through the lining plate 4, so that the stone blocks are prevented from directly falling and impacting the screen mesh framework 5 of the screening machine, which is beneficial to the long-term use of the screening box.

[0022] The screen mesh framework 5 is crosswise composed of a plurality of groups of frame beams, the frame beams are fixed by welding, the connection strength between the frame beams is ensured, the service life of the screen mesh framework 5 is ensured, the two ends of the screen mesh framework 5 are installed and fixed on the screening box side plates 1 through the edge seals, the installation stability and strength of the screen mesh framework 5 are ensured, and when the screen mesh framework 5 is deformed and damaged, the corresponding group of screen mesh frameworks 5 can be conveniently and efficiently disassembled through the edge seals, so that the maintenance and replacement are facilitated, and the time for maintenance and replacement is saved.

[0023] A plurality of groups of reinforcing frameworks 2 are installed on the screening box side plates 1, so as to improve the strength of the side plates, the strip plates 7 are arranged above the screen mesh frameworks 5 to assist in discharging, the overall strength of the screening box can be effectively improved, and the service life of the screening device is improved.

[0024] Further, the three groups of screen mesh frameworks 5 are arranged in layers, and the spacing between the bottom layer of screen mesh frameworks 5 and the middle layer of screen mesh frameworks 5 is greater than the spacing between the middle layer of screen mesh frameworks 5 and the top layer of screen mesh frameworks 5.

[0025] The three groups of screen skeletons 5 screen the stones, and the stones in the lower layer are smaller in size. Because the stones in the lower layer are smaller in size, the kinetic energy of the stones falling and impacting is smaller, and the impact and downward pressure on the screen box are smaller. The size of the stones on the second layer of screen skeletons 5 is larger than that of the stones on the third layer of screen skeletons 5. The distance between the second layer of screen skeletons 5 and the first layer of screen skeletons 5 is set to be short, so that the impact of the larger stones on the second layer of screen skeletons 5 can be effectively reduced, thereby protecting the second layer of screen skeletons 5.

[0026] Further, the lower ends of the three groups of screen skeletons 5 are correspondingly provided with three groups of material leakage openings 8, and each group of material leakage openings 8 is correspondingly provided with a material discharge conveying belt.

[0027] Under the vibration or rotation of the screen skeletons 5, the materials are screened layer by layer according to the size of the particles. The materials with a larger particle size are left on the upper layer of the screen, and the materials with a smaller particle size fall into the lower layer through the screen. The materials passing through each layer of the screen are discharged from the corresponding material leakage opening 8. The material discharge conveying belts below each group of material leakage openings 8 respectively convey the screened materials to different collection points or next processes.

[0028] Further, a transmission shaft is arranged through the middle of the screen box, and a side plate motor 9 is arranged on the outer side of the transmission shaft.

[0029] The transmission shaft is arranged through the middle of the screen box and is a core transmission component of the device. The transmission shaft is usually made of high-strength alloy steel and is heat treated on the surface, so as to have high wear resistance and fatigue resistance. The two ends of the transmission shaft are fixed on the side plates 1 of the screen box through bearings, so as to ensure stable operation. The side plate motor 9 is arranged on the outer side of the screen box and is connected with the transmission shaft, so as to provide power for the device. The motor usually adopts a variable frequency motor or a vibration motor, and the rotating speed and vibration frequency can be adjusted according to the screening requirements.

[0030] Further, spring seats 10 are arranged on the side plates of the two screen boxes, and damping springs 11 are arranged on the spring seats 10.

[0031] The screen box vibrates under the action of the transmission shaft and the side plate motor 9. The vibration is transmitted to the damping springs 11 through the side plates 1 of the screen box. The damping springs 11 absorb the vibration energy of the screen box through elastic deformation, so as to reduce the impact of the vibration on the device and the foundation. The elastic action of the damping springs 11 makes the screen box stable during the vibration process, so as to avoid excessive shaking or resonance.

[0032] Working principle: the screen box has two groups of screen box side plates 1, one group of rear side baffle plates 12 and three groups of screen mesh skeletons 5 spliced together, three groups of screen meshes divide the internal space of the screen box into three hopper bodies, the crushed ore lumps enter the rear through the three layers of screen mesh skeletons 5 for screening, so that the crushed stone lumps are divided according to the particle size and sent out; the rear side of the screen box is provided with a curved plate, when the stone lumps are sent into the screen box, the curved plate on the rear side of the screen box guides the stone lumps to the lining plate 4, and the stone lumps are guided to the screen mesh skeleton 5 through the lining plate 4, so that the stone lumps are prevented from directly falling and impacting the first layer of screen mesh skeletons 5 of the screening machine; the spacing between the second layer of screen mesh skeletons 5 and the first layer of screen mesh skeletons 5 is small, which can effectively reduce the impact of the larger stone lumps on the second layer of screen mesh skeletons 5, thereby protecting the second layer of screen mesh skeletons 5, and through a plurality of reinforcing skeletons 2, the strength of the side plate is improved, the screen mesh skeletons 5 are installed through edge sealing connection, the spring seat 10 is used for shock absorption, the overall strength of the screen box can be effectively improved, and the service life of the screening device is improved.

[0033] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined by those skilled in the art without contradiction.

[0035] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A screening device for a mobile screening machine, characterized by: Including the sieve box, the sieve box includes two groups of sieve box side plates (1) arranged obliquely, the inside of the sieve box side plate (1) is provided with multiple groups of reinforcing skeletons (2), the rear side of the sieve box side plate (1) is provided with rear side baffles (12), the upper side of the rear side baffle (12) is provided with a bending plate (3), the front side of the bending plate (3) is provided with a lining plate (4) obliquely; The sieve box side plate (1) is provided with three groups of screen mesh skeletons (5) of different heights, multiple groups of frame beams are arranged in each group of screen mesh skeletons (5) crossly, the two sides of the frame beam are provided with edge seals, and the upper layer of multiple groups of frame beams is provided with multiple groups of strip plates (7).

2. A screening device for a mobile screening machine according to claim 1, characterized in that The three groups of screen mesh skeletons (5) are arranged in layers, and the spacing between the bottom layer of screen mesh skeletons (5) and the middle layer of screen mesh skeletons (5) is greater than the spacing between the middle layer of screen mesh skeletons (5) and the top layer of screen mesh skeletons (5).

3. A screening apparatus for a mobile screening machine according to claim 1, characterised in that: Three groups of material leakage openings (8) are installed at the lower ends of the three groups of screen mesh skeletons (5), and each group of material leakage openings (8) is connected with a group of discharge conveyors.

4. A screening apparatus for a mobile screening machine according to claim 1, characterised in that: A transmission shaft is arranged through the middle of the sieve box, and a side plate motor (9) is arranged on the corresponding outer side of the transmission shaft.

5. A screening apparatus for a mobile screening machine according to claim 1, characterized in that: Spring seats (10) are installed on the two groups of sieve box side plates (1), and shock-absorbing springs (11) are arranged on the spring seats (10).

6. A screening apparatus for a mobile screening machine according to claim 3, wherein: Vibrating screens are installed on the three groups of screen mesh skeletons (5), the mesh diameters of the three groups of vibrating screens decrease from large to small, and silica gel baffles are arranged on the material leakage openings (8).

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