Ore raw material screening device and process

Abstract

The invention relates to the technical field of screening devices, in particular to an ore raw material screening device and process. An ore raw material screening device comprises a base, a screen, a supporting frame, a first support and a second support. The first support and the second support are sequentially arranged on the base and are both connected with the supporting frame in a sleeved mode, one end of the screen is fixedly connected to the first support, the other end of the screen is sequentially wound around the head end and the tail end of the supporting frame and then fixedly connected with the second support, and the screen can rotate. According to the ore raw material screening device, the screen, the supporting frame, the first support and the second support are arranged on the base, the first support and the second support which are connected with the screen are driven to move while the screen rotates, ore raw materials to be screened are changed relative to the feeding position of the screen, the overall abrasion uniformity of the screen is improved, and the screening efficiency is improved. And therefore, the service life of the screen is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of screening devices, and in particular to an ore raw material screening device and process. Background Art

[0002] Ore raw material screening is an important part of mining production. Its purpose is to separate the ore raw materials into different particle sizes through the screen for further processing and utilization. Ore raw material screening usually uses a drum screen. The drum screen screens the material through a rotating screen. After the material enters the screen drum, the ore raw materials are screened due to the rotation and vibration of the screen.

[0003] However, in the prior art, when the ore raw material is put into the drum screen, after the ore raw material enters the drum screen from one side of the feed port for screening, the screened ore raw material will flow out from one end of the discharge port, but when the ore raw material enters from one side of the feed port of the drum screen, the ore raw material keeps hitting the same circumferential position of the screen on the drum screen close to the feed port side, that is, only one circle of the drum screen in the circumferential direction is hit, and the axial position of the hit does not change, which will cause a greater degree of wear in the local area of ​​the screen, accelerate the damage of the screen, and affect the overall service life of the screen. Summary of the invention

[0004] The present invention provides an ore raw material screening device and process to solve the problem in the existing screening device that when the ore raw material is put into the drum screen, the ore raw material always hits the screen at the same circumferential position, and the axial position of the hitting does not change, which will cause a large degree of wear in the local area of ​​the screen, accelerate the damage of the screen, and affect the service life of the entire screen.

[0005] An ore raw material screening device of the present invention adopts the following technical scheme: an ore raw material screening device comprises a base, a screen, a support frame, a first support frame and a second support frame; the support frame is arranged along a first direction and installed on the base, the first direction is a horizontal direction, the support frame is annular and arranged along the first direction, the two ends of the support frame along the first direction are respectively called the head end and the tail end, the head end is located on the side of the tail end away from the base in the second direction, and the second direction is a vertical direction; the first support frame and the second support frame are arranged in sequence on the base along the first direction and are both sleeved with the support frame, the first support frame is located on the first direction of the second support frame On the side close to the head end of the support frame upward, the first bracket and the second bracket are both annular brackets and can move along the first direction. The screen is elastic, and a plurality of screen holes are evenly distributed on the screen. One end of the screen is fixed to the first bracket, and the other end is sequentially wound around the head end and the tail end of the support frame along the first direction and then fixed to the second bracket. The screens located on both sides of the support frame along the second direction are respectively called the inner screen and the outer screen. The inner screen is located on the side of the outer screen close to the horizontal central axis of the support frame in the second direction. The inner screen defines a screening material channel. The support frame can keep the screen taut, and the screen can rotate around the first direction. The support frame includes two support rings and a plurality of support rods. The two support rings are sequentially arranged on the base along the first direction. The plurality of support rods are all arranged along the first direction and fixedly arranged between the two support rings, and are evenly distributed between the two support rings around the first direction. The support rod includes a first rod segment, a second rod segment and a first elastic member. The first rod segment and the second rod segment are both arranged along the first direction. The first rod segment and the second rod segment are connected by a first elastic member, and the first elastic member is arranged along the first direction.

[0006] Furthermore, a rotating member is provided on each of the two support rings. The rotating member is provided at one end of the two support rings away from each other in the first direction. The rotating member includes a plurality of rollers. The plurality of rollers are evenly distributed around the first direction on the corresponding support rings.

[0007] Further, the first bracket and the second bracket are spaced apart in the first direction.

[0008] Furthermore, a rotating wheel is arranged on the base, and the rotating wheel can be arranged to rotate around a first direction; a rotating ring is arranged on the outer net, and the rotating ring is engaged with the rotating wheel. The outer net can rotate with the rotating ring and slide along the first direction relative to the rotating ring.

[0009] Furthermore, a connecting key is fixed to the outer net, and a connecting groove is opened on the inner wall surface of the rotating ring. The connecting key and the connecting groove are both arranged along the first direction. The connecting key is slidably installed in the connecting groove, so that the outer net can rotate with the rotating ring and slide along the first direction relative to the rotating ring.

[0010] Furthermore, a first hydraulic cylinder and a second hydraulic cylinder are provided on the base, the first bracket is installed at the output end of the first hydraulic cylinder, and the second bracket is installed at the output end of the second hydraulic cylinder, so that both the first bracket and the second bracket can move along the first direction.

[0011] Furthermore, the first bracket is fixedly connected to the first hydraulic cylinder, the second bracket is slidably connected to the second hydraulic cylinder, and the second bracket can move along the first direction with the second hydraulic cylinder, and can move along the second direction relative to the second hydraulic cylinder; a transmission belt is provided on the base, and the side edge of the transmission belt close to the second bracket along the second direction is called the upper side edge, and the upper side edge can move along the first direction toward the rear end of the support frame, and the second bracket can move downward to abut against the upper side edge.

[0012] The present invention also provides an ore raw material screening process, using the above-mentioned ore raw material screening device, comprising the following steps: S10, feeding the ore raw materials to be screened into the screening channel from one side of the head end of the support frame; S20, driving the first bracket and the second bracket to move in the same direction in the first direction, and driving the screen to rotate around the first direction; S30, the first bracket moves to drive one end of the screen connected to the first bracket to move synchronously, and the second bracket moves to drive one end of the screen connected to the second bracket to move synchronously; S40, the ore material to be screened is discharged from one side of the rear end of the support frame after being screened through the screening channel.

[0013] The beneficial effects of the present invention are as follows: an ore raw material screening device of the present invention arranges a screen, a support frame, a first support and a second support on a base, so that the screen rotates and the first support and the second support connected to the screen are driven to move. When the screen is driven to flip by the first support and the second support, when the outer screen flips to the position of the inner screen, or when the inner screen flips to the position of the outer screen, the feeding position of the ore raw material to be screened fed into the screening channel from the head end side of the support frame can be changed relative to the screen. That is, the position where the ore raw material to be screened enters remains unchanged, while the part of the screen contacting the ore raw material to be screened changes with the movement of the first support and the second support, thereby avoiding that the ore raw material to be screened hits the same circumferential position of the screen every time it enters the screening channel, resulting in greater wear of the screen at this position, thereby improving the uniformity of overall wear of the screen, and further improving the service life of the screen. And because the screen is elastic, when the inner screen flips to the position of the outer screen, the diameter of the screen will increase, and then the diameter of the screen holes on the outer screen will increase and be larger than the diameter of the screen holes on the inner screen, so that the ore raw materials blocked on the screen can fall down, the screen can be cleaned, the screen is prevented from being blocked, and the timeliness of the ore raw material screening is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the overall structure of an embodiment of an ore raw material screening device of the present invention; Figure 2 It is a front view of the overall structure of an embodiment of an ore raw material screening device of the present invention; Figure 3 for Figure 2 Sectional view along AA; Figure 4 A side view of the overall structure of an embodiment of an ore raw material screening device of the present invention; Figure 5 for Figure 4 Cross-sectional view along the middle line BB; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 for Figure 5 The enlarged view of point D in the middle; Figure 8 for Figure 5 Enlarged view of point E in the middle.

[0016] In the figure: 100, base; 101, mounting rod; 110, rotating wheel; 120, first hydraulic cylinder; 130, second hydraulic cylinder; 140, limiting rod; 150, transmission belt; 200, screen; 210, rotating ring; 220, inner net; 230, outer net; 300, supporting frame; 310, supporting ring; 320, supporting rod; 321, first rod segment; 322, second rod segment; 323, first elastic member; 330, roller; 400, first bracket; 500, second bracket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides an embodiment of an ore raw material screening device, such as Figures 1 to 8 shown.

[0019] A ore raw material screening device includes a base 100, a screen 200, a support frame 300, a first bracket 400 and a second bracket 500. The support frame 300 is arranged along a first direction and installed on the base 100, the first direction is a horizontal direction, the support frame 300 is annular and arranged along the first direction, the two ends of the support frame 300 along the first direction are respectively called the head end and the tail end, the head end is located on the side of the tail end away from the base 100 in the second direction, and the second direction is a vertical direction. The first bracket 400 and the second bracket 500 are arranged in sequence along the first direction on the base 100 and are both sleeved with the support frame 300, the first bracket 400 is located on the side of the second bracket 500 close to the head end of the support frame 300 in the first direction, the first bracket 400 and the second bracket 500 are both annular frames and can move along the first direction, the screen 200 is elastic, and the screen 200 is a rubber screen or a polyurethane screen. A plurality of sieve holes are evenly distributed on the sieve 200, one end of the sieve 200 is fixedly connected to the first bracket 400, and the other end is successively wound around the head end and the tail end of the support frame 300 along the first direction and then fixedly connected to the second bracket 500. The sieves 200 located on both sides of the support frame 300 along the second direction are respectively referred to as the inner sieve 220 and the outer sieve 230. The inner sieve 220 is located on the side of the outer sieve 230 close to the horizontal center axis of the support frame 300 in the second direction, and a sieve material channel is defined on the inner sieve 220. The support frame 300 can keep the sieve 200 taut, and the sieve 200 can rotate around the first direction.

[0020] In this embodiment, a screen 200, a support frame 300, a first support frame 400 and a second support frame 500 are arranged on a base 100. When in use, the ore material to be screened is fed into the screening material channel from one side of the head end of the support frame 300. Figure 5 As shown, attached Figure 5 The left side of the middle support frame 300 is the head end, and the right side is the tail end. Then the first support frame 400 and the second support frame 500 are driven to move in the same direction in the first direction, and the screen 200 is driven to rotate around the first direction.

[0021] See attached Figure 5 As shown, first drive the first bracket 400 and the second bracket 500 to move leftward simultaneously in the first direction. The leftward movement of the first bracket 400 will cause one end of the screen 200 connected thereto to move leftward and flip the outer net 230 to the position of the inner net 220 after passing through the support frame 300, and perform the work of screening materials in the screening channel. The leftward movement of the second bracket 500 will cause one end of the screen 200 connected thereto to move leftward, thereby flipping the inner net 220 to the position of the outer net 230.

[0022] Then the first bracket 400 and the second bracket 500 are driven to move rightward in the first direction at the same time. Similarly, the movement of the first bracket 400 to the right will cause one end of the screen 200 connected thereto to move rightward and flip the inner net 220 to the position of the outer net 230 after passing through the support frame 300. The movement of the second bracket 500 to the right will cause one end of the screen 200 connected thereto to move rightward, thereby flipping the outer net 230 to the position of the inner net 220, and taking on the work of screening in the screening channel. At the same time, the entire screen 200 rotates around the first direction, so that the ore raw materials to be screened are sent into the screening channel from the head end side of the support frame 300, and after being screened in the screening channel, they are discharged from the tail end side of the support frame 300, and the first bracket 400 and the second bracket 500 are driven to move reciprocatingly according to the above process.

[0023] By rotating the screen 200 and driving the first bracket 400 and the second bracket 500 connected to the screen 200 to move, when the screen 200 is turned over by the first bracket 400 and the second bracket 500, when the outer net 230 turns over to the position of the inner net 220, or when the inner net 220 turns over to the position of the outer net 230, the feeding position of the ore raw material to be screened fed into the screening channel from the head end side of the support frame 300 can be changed relative to the screen 200, that is, the entry position of the ore raw material to be screened remains unchanged, while the part of the screen 200 in contact with the ore raw material to be screened changes with the movement of the first bracket 400 and the second bracket 500, thereby avoiding that the ore raw material to be screened hits the same circumferential position of the screen 200 every time it enters the screening channel, resulting in greater wear of the screen 200 at this position, thereby improving the uniformity of the overall wear of the screen 200 and further improving the service life of the screen 200. And because the screen 200 is elastic, when the inner net 220 flips to the position of the outer net 230, the diameter of the screen 200 will increase, thereby increasing the diameter of the screen holes on the outer net 230 and making it larger than the diameter of the screen holes on the inner net 220, so that the ore raw materials blocked on the screen 200 can fall down, and the screen 200 can be cleaned to prevent the screen 200 from being blocked, thereby improving the timeliness of the ore raw material screening.

[0024] In this embodiment, the support frame 300 includes two support rings 310 and a plurality of support rods 320. The two support rings 310 are arranged in sequence along the first direction on the base 100. The plurality of support rods 320 are all arranged along the first direction and fixedly arranged between the two support rings 310, and are evenly distributed around the first direction between the two support rings 310.

[0025] Specifically, the support rod 320 is a telescopic rod, and the support rod 320 includes a first rod segment 321, a second rod segment 322 and a first elastic member 323. The first rod segment 321 and the second rod segment 322 are both arranged along the first direction, and the first rod segment 321 and the second rod segment 322 are connected by the first elastic member 323. The first elastic member 323 is arranged along the first direction, and the first elastic member 323 is a compression spring. A mounting rod 101 is fixedly arranged on the base 100, and a mounting ring is provided on the mounting rod 101, and the support rod 320 is slidably matched with the mounting ring.

[0026] Furthermore, a rotating member is disposed on each of the two support rings 310 , and the rotating member is disposed at one end of the two support rings 310 away from each other in the first direction. The rotating member includes a plurality of rollers 330 , and the plurality of rollers 330 are evenly distributed around the first direction on the corresponding support rings 310 .

[0027] In this embodiment, two support rings 310 and a plurality of support rods 320 are provided, and the support rods 320 are provided as telescopic rods, so that after the screen 200 is wound on the support frame 300, the screen 200 can always remain tensioned under the adjustment of the first elastic member 323 on the support rods 320, and the roller 330 provided on the support ring 310 can reduce the friction between the screen 200 and the support ring 310 when the screen 200 rotates around the support ring 310.

[0028] In this embodiment, the first bracket 400 and the second bracket 500 are spaced apart in the first direction.

[0029] By leaving a distance between the first support 400 and the second support 500 , the ore material can directly fall when passing through the screen 200 between the first support 400 and the second support 500 , thereby improving the uniformity of the ore material screening.

[0030] In this embodiment, a rotating wheel 110 is disposed on the base 100, and the rotating wheel 110 is rotatable around a first direction. A rotating ring 210 is sleeved on the outer net 230, and the rotating ring 210 is meshed with the rotating wheel 110, so that when the rotating wheel 110 rotates, the rotating ring 210 can be driven to rotate, and the outer net 230 can rotate with the rotating ring 210 and slide relative to the rotating ring 210 along the first direction.

[0031] Specifically, a first motor is provided on the base 100, and the rotating wheel 110 is installed at the output end of the first motor, so that the rotating wheel 110 can rotate around the first direction. A connecting key is fixedly connected to the outer net 230, and a connecting groove is provided on the inner peripheral wall surface of the rotating ring 210. The connecting key and the connecting groove are both arranged along the first direction. The connecting key is slidably installed in the connecting groove, so that the outer net 230 can rotate with the rotating ring 210 and slide relative to the rotating ring 210 along the first direction. It should be particularly noted that the part of the outer net 230 where the connecting key is provided will not rotate to the inner net 220 to prevent the connecting key from being separated from the connecting groove.

[0032] In this embodiment, a first hydraulic cylinder 120 and a second hydraulic cylinder 130 are provided on the base 100, a first bracket 400 is installed at the output end of the first hydraulic cylinder 120, and a second bracket 500 is installed at the output end of the second hydraulic cylinder 130, so that the first bracket 400 and the second bracket 500 can both move along the first direction.

[0033] Furthermore, a plurality of limit rods 140 are provided on the base 100, and the plurality of limit rods 140 are all provided along the first direction. The limit rods 140 sequentially pass through the first bracket 400 and the second bracket 500, and slideably cooperate with the first bracket 400 and the second bracket 500, thereby limiting the movement of the first bracket 400 and the second bracket 500 in the first direction.

[0034] In another possible embodiment, the first bracket 400 is fixedly connected to the first hydraulic cylinder 120, the second bracket 500 is slidably connected to the second hydraulic cylinder 130, and the second bracket 500 can move along the first direction with the second hydraulic cylinder 130, and can move along the second direction relative to the second hydraulic cylinder 130. A transmission belt 150 is provided on the base 100, and the side of the transmission belt 150 close to the second bracket 500 along the second direction is called the upper side, and the upper side can move along the first direction toward the rear end of the support frame 300, and the second bracket 500 can move downward to abut against the upper side.

[0035] Specifically, a slide groove is provided on the second bracket 500, the slide groove is arranged along the second direction, and the output end of the second hydraulic cylinder 130 is clamped in the slide groove through a second elastic member, the second elastic member is arranged along the second direction, and the second elastic member is a spring, so that the second bracket 500 can move along the first direction with the second hydraulic cylinder 130, and can move relative to the second hydraulic cylinder 130 in the second direction.

[0036] The base 100 is provided with a second motor, a first transmission wheel and a second transmission wheel, the first transmission wheel and the second transmission wheel are arranged in sequence in the first direction, the first transmission wheel is fixedly mounted on the output shaft of the second motor, and the transmission belt 150 is wound around the first transmission wheel and the second transmission wheel in sequence, so that the transmission belt 150 can rotate under the drive of the first transmission wheel and the second transmission wheel. Figure 5 As shown, the upper side of the driving belt 150 can move from left to right.

[0037] During use, when the ore material to be screened enters the screening channel from the head end side of the support frame 300 for screening, the screened ore material will fall from the tail end side of the support frame 300. However, during the screening process, when the material on the tail end side of the support frame 300 accumulates, resulting in insufficient screening of the ore material, that is, the ore material falling through the screen 200 decreases, and the ore material falling from the tail end side of the support frame 300 increases. Under the action of gravity, the ore material will cause the screen 200 located on the tail end side of the support frame 300 to move downward, causing the second bracket 500 to compress the second elastic member downward in the slide groove, and after the second bracket 500 moves downward to abut against the upper side edge, the second bracket 500 will move to the right under the urging of the upper side edge, see the attached Figure 5 As shown, at this time, if the first bracket 400 and the second bracket 500 are in a state of synchronously moving to the right, the upper side will give the second bracket 500 an additional rightward force, and then the outer net 230 connected thereto will be driven by the second bracket 500 to further move a certain distance to the right. However, since the first bracket 400 and the second bracket 500 are in a state of synchronous and unidirectional movement, the additional distance to the right moved by the second bracket 500 under the promotion of the transmission belt 150 will cause the screen 200 to be tensioned under the adjustment of the first elastic member 323. At this time, the first elastic member 323 will be stretched, and the length of the support rod 320 in the first direction will increase, thereby increasing the length of the screening channel in the first direction. Similarly, when the first bracket 400 and the second bracket 500 are in a state of synchronously moving to the left, the distance that the second bracket 500 moves to the left under the impetus of the transmission belt 150 will cause the screen 200 to be tensioned under the adjustment of the first elastic member 323. At this time, the first elastic member 323 will be stretched, and the length of the support rod 320 in the first direction will increase, thereby increasing the length of the screening channel in the first direction, so that the ore raw materials can be screened more fully, and the floor area of ​​the entire ore raw material screening device remains unchanged.

[0038] Specifically, a waist-shaped groove is formed on the second bracket 500 , and the waist-shaped groove is arranged along the second direction. The limiting rod 140 passes through the waist-shaped groove, so that the second bracket 500 can slide relative to the limiting rod 140 along the second direction.

[0039] In combination with the above embodiments, the specific working process is as follows: When in use, the ore material to be screened is fed into the screening material channel from the front end side of the support frame 300, and then the first hydraulic cylinder 120 and the second hydraulic cylinder 130 are started to drive the first support 400 and the second support 500 to move in the same direction in the first direction, and drive the screen 200 to rotate around the first direction. Figure 5 As shown, first drive the first bracket 400 and the second bracket 500 to move leftward simultaneously in the first direction. The leftward movement of the first bracket 400 will cause one end of the screen 200 connected thereto to move leftward and flip the outer net 230 to the position of the inner net 220 after passing through the support frame 300, and perform the work of screening materials in the screening channel. The leftward movement of the second bracket 500 will cause one end of the screen 200 connected thereto to move leftward, thereby flipping the inner net 220 to the position of the outer net 230. Then the first bracket 400 and the second bracket 500 are driven to move rightward in the first direction at the same time. Similarly, the movement of the first bracket 400 to the right will cause one end of the screen 200 connected thereto to move rightward and flip the inner net 220 to the position of the outer net 230 after passing through the support frame 300. The movement of the second bracket 500 to the right will cause one end of the screen 200 connected thereto to move rightward, thereby flipping the outer net 230 to the position of the inner net 220, and taking on the work of screening in the screening channel. At the same time, the entire screen 200 rotates around the first direction, so that the ore raw materials to be screened are sent into the screening channel from the head end side of the support frame 300, and after being screened in the screening channel, they are discharged from the tail end side of the support frame 300, and the first bracket 400 and the second bracket 500 are driven to move reciprocatingly according to the above process.

[0040] The present invention also provides an ore raw material screening process, using the above-mentioned ore raw material screening device, comprising the following steps: S10, feeding the ore material to be screened into the screening channel from one side of the head end of the support frame 300; S20, driving the first bracket 400 and the second bracket 500 to move in the same direction in the first direction, and driving the screen 200 to rotate around the first direction; S30, the first bracket 400 moves to drive one end of the screen 200 connected to the first bracket 400 to move synchronously, and the second bracket 500 moves to drive one end of the screen 200 connected to the second bracket 500 to move synchronously; S40, the ore material to be screened is discharged from one side of the rear end of the support frame 300 after being screened through the screening channel.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ore raw material screening device, characterized in that: It includes a base, a screen, a support frame, a first support frame and a second support frame; the support frame is arranged along a first direction and installed on the base, the first direction is a horizontal direction, the support frame is annular and arranged along the first direction, the two ends of the support frame along the first direction are respectively called the head end and the tail end, the head end is located on the side of the tail end away from the base in the second direction, and the second direction is a vertical direction; the first support frame and the second support frame are arranged in sequence on the base along the first direction and are both sleeved with the support frame, the first support frame is located on the side of the second support frame close to the head end of the support frame in the first direction, the first support frame and the second support frame are both annular frames and can move in the first direction, the screen is elastic, and a plurality of screen holes are evenly distributed on the screen, one end of the screen is fixed to the first support frame, and the other end is arranged around the head end and the tail end of the support frame in sequence along the first direction. The sieves are located on both sides of the support frame along the second direction and are respectively called inner sieves and outer sieves. The inner sieve is located on one side of the outer sieve in the second direction close to the horizontal center axis of the support frame. A screening material channel is defined on the inner sieve. The support frame can keep the sieve taut and the sieve can rotate around the first direction. The support frame includes two support rings and multiple support rods. The two support rings are sequentially arranged on the base along the first direction. The multiple support rods are all arranged along the first direction and fixedly arranged between the two support rings, and are evenly distributed around the first direction between the two support rings. The support rod includes a first rod segment, a second rod segment and a first elastic member. The first rod segment and the second rod segment are both arranged along the first direction. The first rod segment and the second rod segment are connected by a first elastic member, and the first elastic member is arranged along the first direction.

2. The ore raw material screening device according to claim 1, characterized in that: The two support rings are both provided with a rotating member, which is arranged at one end of the two support rings away from each other in the first direction. The rotating member includes a plurality of rollers, and the plurality of rollers are evenly distributed around the first direction on the corresponding support rings.

3. The ore raw material screening device according to claim 1, characterized in that: The first bracket and the second bracket are spaced apart in the first direction.

4. The ore raw material screening device according to claim 1, characterized in that: A rotating wheel is arranged on the base, and the rotating wheel can be arranged to rotate around a first direction; a rotating ring is sleeved on the outer net, and the rotating ring is engaged with the rotating wheel. The outer net can rotate with the rotating ring and slide along the first direction relative to the rotating ring.

5. The ore raw material screening device according to claim 4, characterized in that: A connecting key is fixedly connected to the outer net, and a connecting groove is opened on the inner wall surface of the rotating ring. The connecting key and the connecting groove are both arranged along the first direction. The connecting key is slidably installed in the connecting groove, so that the outer net can rotate with the rotating ring and slide along the first direction relative to the rotating ring.

6. The ore raw material screening device according to claim 1, characterized in that: A first hydraulic cylinder and a second hydraulic cylinder are arranged on the base, a first bracket is installed at the output end of the first hydraulic cylinder, and a second bracket is installed at the output end of the second hydraulic cylinder, so that both the first bracket and the second bracket can move along the first direction.

7. The ore raw material screening device according to claim 6, characterized in that: The first bracket is fixedly connected to the first hydraulic cylinder, the second bracket is slidably connected to the second hydraulic cylinder, and the second bracket can move along the first direction with the second hydraulic cylinder, and can move relative to the second hydraulic cylinder in the second direction; a transmission belt is provided on the base, and the side of the transmission belt close to the second bracket along the second direction is called the upper side, and the upper side can move along the first direction toward the rear end of the support frame, and the second bracket can move downward to abut against the upper side.

8. A ore raw material screening process, using the ore raw material screening device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S10, feeding the ore raw materials to be screened into the screening channel from one side of the head end of the support frame; S20, driving the first bracket and the second bracket to move in the same direction in the first direction, and driving the screen to rotate around the first direction; S30, the first bracket moves to drive one end of the screen connected to the first bracket to move synchronously, and the second bracket moves to drive one end of the screen connected to the second bracket to move synchronously; S40, the ore material to be screened is discharged from one side of the rear end of the support frame after being screened through the screening channel.

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