Return material circulating device of screening machine

Abstract

The utility model discloses a material returning and circulating device of a screening machine, which belongs to the technical field of screening machines and comprises a transverse conveying belt and a material returning and feeding conveying belt, the material returning and feeding conveying belt is obliquely arranged on the lower side of the transverse conveying belt and comprises a supporting bottom plate, and the supporting bottom plate is arranged on the lower side of the transverse conveying belt. A plurality of sets of supporting units arranged in parallel are arranged on the upper end face of the supporting bottom plate. A buffering guide plate is arranged on the material returning and feeding conveying belt and used for bearing impact of material falling and reducing direct impact on the material returning device, the impact force of material falling is damped and buffered through a damping device, rigid collision between materials and the material returning and feeding conveying belt is reduced, and therefore the service life of the material returning and feeding conveying belt is prolonged. The supporting structure of the supporting bottom plate and the supporting units can guarantee the supporting strength of the material returning device, use faults are reduced, and then the working efficiency of the screening machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of screening machine, concretely relates to a back material circulating device of screening machine. BACKGROUND

[0002] The industrial and mining screening machine is a downstream equipment of the crusher, and its main function is to screen the ore material crushed by the crusher into materials of different particle sizes; in the existing market, the screening machine is mostly fixed structure, and in order to cope with the complex environment of different ore mining and the frequently changed operation scene, there are also some movable industrial and mining screening machines in the existing market.

[0003] The movable industrial and mining screening machine generally adopts a moving mechanism to drive the whole machine to move (mostly a track moving mechanism), the conveying device sends the material crushed by the crusher to the screening device, and the material is sent out through the conveying device after being screened by the screening device; but in actual operation, part of the material cannot be completely crushed by the crusher, and the material that is not completely crushed is too large in size and weight and needs to be sent back to the crusher for crushing again, and because the material is large in size and weight, the conventional conveying device has a high failure rate in the back material process, affecting the efficiency of processing and use.

[0004] Therefore, we design a back material circulating device of screening machine to provide another technical scheme for the above technical problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a back material circulating device of screening machine to solve the problems of the existing screening machine in the use process.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a back material circulating device of screening machine, including horizontal conveying belt and back material feeding conveyor belt, the back material feeding conveyor belt is obliquely arranged on the lower side of the horizontal conveying belt, the back material feeding conveyor belt includes support base plate, a plurality of groups of parallel support units are arranged on the upper end face of the support base plate, rotating roller devices are arranged at both ends of the support base plate, and the support unit is used as the top surface and the support base plate is used as the bottom surface, and a conveyor belt is sleeved, the butt joint position of the back material feeding conveyor belt and the horizontal conveying belt is provided with a buffer guide plate through a door-shaped frame.

[0007] Preferably, the support unit includes three groups of U-shaped arranged roller bodies, and the three groups of U-shaped arranged roller bodies make the upper end surface of the conveyor belt be U-shaped.

[0008] Preferably, the rotating roller device includes a direct fixing frame and a rotating roller, a limiting rod is arranged on the fixing frame, and a telescopic adjusting device is further arranged between the fixing frame and the rotating roller.

[0009] Preferably, the bottom of the support base plate is provided with a damping device, and the damping device comprises a fixed support and a piston damper.

[0010] Preferably, a reinforcing support beam is arranged on the upper half of the support base plate.

[0011] Preferably, the bottom of the support base plate is provided with a plurality of groups of follow-up rollers, and one side of the follow-up rollers is further provided with a limiting rod.

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

[0013] The buffering guide plate is arranged on the material returning and feeding conveying belt, is used for bearing the impact of material falling, reduces the direct impact on the material returning device, and then buffers the impact force of material falling through the damping device, reduces the rigid collision of the material and the material returning and feeding conveying belt, so that the service life of the material returning and feeding conveying belt is prolonged, the support structure of the support base plate and the support unit can guarantee the support strength of the material returning device, reduces the use failure, and then improves the operation efficiency of the screening machine. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0016] Fig. 3 It is a rotating roller device structure schematic view of the utility model.

[0017] In the drawing: 1, horizontal conveying belt; 2, material returning and feeding conveying belt; 3, door-shaped frame; 4, buffering guide plate; 5, support base plate; 6, support unit; 7, reinforcing support beam; 8, rotating roller device; 9, conveying belt; 10, damping device; 11, roller body; 12, fixed support; 13, rotating roller; 14, limiting rod; 15, telescopic adjusting device. DETAILED DESCRIPTION

[0018] 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, not 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.

[0019] Refer to Figs. 1-3A material return circulation device for a screening machine includes a transverse conveyor belt 1 and a material return conveyor belt 2. The material return conveyor belt 2 is obliquely arranged below the transverse conveyor belt 1. The material return conveyor belt 2 includes a support base plate 5. Multiple sets of parallel support units 6 are arranged on the upper surface of the support base plate 5. Rotating roller devices 8 are arranged at both ends of the support base plate 5. A conveyor belt 9 is sleeved with the support unit 6 as the top surface and the support base plate 5 as the bottom surface. The docking position of the material return conveyor belt 2 and the transverse conveyor belt 1 is provided with a buffer guide plate 4 through a portal frame 3.

[0020] This solution proposes a material return and circulation device for a screening machine. The material return and circulation device is connected to the screening mechanism of the screening machine via a transverse conveyor belt 1. The material that is not fully crushed after being screened out by the screening machine enters the transverse conveyor belt 1 from the screening mechanism, and then enters the material return feeding conveyor belt 2 through the transverse conveyor belt 1. The material return feeding conveyor belt 2 sends the material back to the crusher for further crushing. In this solution, a buffer guide plate 4 is set on the material return feeding conveyor belt 2. The buffer guide plate 4 is made of high-strength alloy steel to withstand the impact of falling material, reduce the direct impact on the material return device, and indirectly improve its service life. After the material is guided to the conveyor belt 9, it is finally sent out through the movement of the conveyor belt 9. The support structure of the supporting base plate 5 and the supporting unit 6 can ensure the support strength of the material return device, reduce failures during use, and thus improve the operating efficiency of the screening machine.

[0021] Furthermore, the support unit 6 includes three sets of U-shaped rollers 11, which make the upper end face of the conveyor belt 9 U-shaped.

[0022] The support unit 6 features a U-shaped roller array design, consisting of three specially arranged roller systems 11, which together construct a U-shaped bearing channel with a certain depth. The rollers 11 are made of 304 stainless steel with a wear-resistant coating on the surface, which reduces material friction loss while ensuring structural strength. The central main roller group is driven by a servo motor via a synchronous belt, and the auxiliary roller groups on both sides are equipped with torque limiters to achieve adaptive follow-up, ensuring stable operation of the conveyor belt 9. The unique U-shaped curved surface can automatically center and guide the material, preventing the material from rolling off the conveyor belt 9.

[0023] Furthermore, the rotating roller 13 device 8 includes a direct fixing frame 12 and a rotating roller 13. A limit rod 14 is provided on the fixing frame 12, and a telescopic adjustment device 15 is also provided between the fixing frame 12 and the rotating roller 13.

[0024] With this technical solution, the rotating roller 13 rotates, thereby driving the conveyor belt 9 to rotate and transport materials. The distance between the fixed frame 12 and the rotating roller 13 can be changed by the telescopic adjustment device 15, thereby adjusting the tension of the conveyor belt 9 and ensuring the conveying effect of the conveyor belt 9. The limit rod 14 is set on both sides of the conveyor belt 9 to limit the movement of the conveyor belt 9 and prevent the conveyor belt 9 from running off-center.

[0025] Furthermore, a shock-absorbing device 10 is provided at the bottom of the supporting base plate 5. The shock-absorbing device 10 includes a fixed bracket and a piston shock absorber.

[0026] The shock absorption device 10 is used to absorb and buffer the impact of falling materials, reduce the rigid collision between materials and the return material feeding conveyor belt 2, thereby improving the service life of the return material feeding conveyor belt 2 and reducing the failure rate of the return material feeding conveyor belt 2.

[0027] Furthermore, a reinforcing support beam 7 is provided on the upper half of the supporting base plate 5.

[0028] The reinforcing support beam 7 is set in the same direction as the end face of the conveyor belt 9. The reinforcing support beam 7 is set on one side of the end of the return material feeding conveyor belt 2, which can effectively improve the end strength of the return material feeding conveyor belt 2 and ensure the overall durability of the return material feeding conveyor belt 2.

[0029] With this technical solution, multiple sets of follower rollers are provided at the bottom of the support base plate 5, and a limit rod 14 is also provided on one side of the follower rollers.

[0030] The follower roller and limit rod 14 at the bottom of the support base plate 5 are used to stabilize the movement of the conveyor belt 9 and improve the operational stability of the return material feeding conveyor belt 2.

[0031] Working Principle: The return material circulation device connects to the screening mechanism of the screening machine via the transverse conveyor belt 1. Incompletely crushed materials screened out by the screening machine enter the transverse conveyor belt 1, and then enter the return material feeding conveyor belt 2. The return material feeding conveyor belt 2 then returns the material to the crusher for further crushing. A buffer guide plate 4, made of high-strength alloy steel, is installed on the return material feeding conveyor belt 2 to withstand the impact of falling materials, reducing direct impact on the return material device. A shock-absorbing device 10 further dampens and buffers the impact of falling materials, reducing rigid collisions between the material and the return material feeding conveyor belt 2, thereby extending the service life of the return material feeding conveyor belt 2. The supporting structure of the base plate 5 and the supporting unit 6 ensures the support strength of the return material device, reducing malfunctions and ultimately improving the operating efficiency of the screening machine.

[0032] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In the description of this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this invention without contradiction.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material return circulation device for a screening machine, characterized in that: It includes a transverse conveyor belt and a return material feeding conveyor belt. The return material feeding conveyor belt is obliquely arranged below the transverse conveyor belt. The return material feeding conveyor belt includes a supporting base plate. Multiple sets of parallel supporting units are arranged on the upper surface of the supporting base plate. Rotating roller devices are arranged at both ends of the supporting base plate. The conveyor belt is sleeved with the supporting units as the top surface and the supporting base plate as the bottom surface. The docking position of the return material feeding conveyor belt and the transverse conveyor belt is provided with a buffer guide plate through a portal frame.

2. The material return circulation device for a screening machine according to claim 1, characterized in that: The support unit includes three sets of U-shaped rollers, which make the upper surface of the conveyor belt U-shaped.

3. The material return circulation device for a screening machine according to claim 1, characterized in that: The rotating roller device includes a direct fixing frame and a rotating roller. The fixing frame is provided with a limit rod, and a telescopic adjustment device is also provided between the fixing frame and the rotating roller.

4. The material return circulation device for a screening machine according to claim 1, characterized in that: The bottom of the supporting base plate is provided with a shock-absorbing device, which includes a fixed bracket and a piston shock absorber.

5. The material return circulation device for a screening machine according to claim 1, characterized in that: A reinforcing support beam is provided on the upper half of the supporting base plate.

6. The material return circulation device for a screening machine according to claim 1, characterized in that: The bottom of the support base plate is provided with multiple sets of follower rollers, and a limit rod is also provided on one side of the follower rollers.

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