Multi-stage screening device for integrated sand making building

Abstract

The multi-stage screening device for the integrated sand making building comprises a screening box, a plurality of screening net frames are arranged in the screening box side by side from top to bottom, screening nets are movably connected to the inner sides of the screening net frames, and a plurality of follow-up mechanisms are arranged on the front side and the rear side of each screening net frame side by side at equal intervals correspondingly; the follow-up mechanism comprises two bottom plates which are in central symmetry and are provided with sliding grooves I in a penetrating mode, through grooves are formed in the screen frame corresponding to the sliding grooves I, meanwhile, a plurality of vibration screen frames are arranged on the lower side of the screen, the front end and the rear end of each vibration screen frame penetrate through the corresponding through grooves and the corresponding sliding grooves I respectively, each bottom plate is fixedly connected with a follow-up rod, and the follow-up rods are fixedly connected with the screen frame. A driven mechanism comprising a driven rod is arranged between the two bottom plates, and the driven rod, the end of the vibrating net frame and the follow-up rod are located on the same vertical plane, so that the driven rod can abut against the vibrating net frame and the follow-up rod in the rotating process, and therefore left-right and up-down movement of the screen is achieved; compared with the prior art, the device can effectively absorb noise and reduce the overall vibration of the sand making building.

Description

Technical Field

[0001] The invention relates to the technical field of integrated sand making building screening mechanisms, and in particular to a multi-stage screening device for an integrated sand making building. Background Art

[0002] Sand and gravel are one of the important raw materials for my country's infrastructure construction. With the depletion of domestic natural sand, river sand and other resources and the government's increased control over mining, the replacement of natural sand with artificial sand has become an inevitable trend in the development of the industry. Artificial sand is rock particles with a nominal particle size of less than 5mm that are mined by removing soil, mechanically crushed, and screened.

[0003] Traditional crushing, screening and transportation mostly adopts a flat expansion operation mode, through a large number of belt conveyors of different lengths, step by step connection, return, etc. to realize the operation of the entire system. However, the flat expansion operation mode requires that each device be set on the same plane, which requires a larger floor space; some technologies will adopt a vertical building-style sand making structure design to improve space utilization.

[0004] However, in order to give full play to the gravitational potential energy, reduce the energy loss in the process of transporting sand and gravel, and ensure that the sand and gravel with different grades after screening can be correctly distributed to the reasonable processing position, the vertical building-type sand making mechanism generally sets a corresponding multi-stage screening device on the top of the vertical building. In the existing technical device, the crushed sand and gravel are transported to the top of the sand making building by a bucket elevator and tilted to the feeding port of the screening device. After that, the sand and gravel are screened into different grades according to the particle size through multi-stage screening and then transported to the next processing step to complete mixing or re-crushing.

[0005] The multi-stage screening device used in the prior art devices is mostly a vibrating screen, which is a common device for screening devices. It generally includes a screen box, and screens arranged equidistantly from top to bottom inside the screen box. A hopper is provided on one side of the screen box, and the screens are arranged at an angle so that the gravity potential energy of the sand and gravel can be used to move them into the material during the vibration of the screen. Specifically, the prior art devices generally have a bracket provided under the screen box, and the movable connection between the bracket and the screen box is achieved through a compression spring. At the same time, a large vibration motor is generally provided at the lower end of the screen box, and the vibration motor is achieved through the eccentric rotation of the counterweight on the vibration motor, thereby driving the overall vibration process of the screen box.

[0006] During actual use, we found that since the existing technical device needs to drive the overall movement of the screen box, the power requirement for the vibration motor is relatively high, and the structural strength of the screen box is also relatively high. At the same time, since the screen box vibrates continuously relative to the bracket and the sand-making building, the screen box will also exert continuous vibration impact on the sand-making building, which will not only destroy the structural strength of the sand-making building, but also generate a lot of noise.

[0007] Therefore, we believe that there is a need for a low-energy multi-stage screening device that can reduce the impact on the sand-making building structure and reduce noise. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention proposes an integrated multi-stage screening device for a sand-making building, which has the advantages of low energy consumption and avoiding vibration impact on the sand-making building. It solves the shortcomings of the prior art device that the screening device has a large dead weight, has high requirements for the corresponding driving mechanism, and causes a large vibration impact on the sand-making building during its vibration process.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A multi-stage screening device for an integrated sand making building comprises a screen box composed of a front wall panel and a rear wall panel, the front wall panel and the rear wall panel are fixedly connected by a connecting rod, and a plurality of screens are arranged equidistantly and side by side from top to bottom between the front wall panel and the rear wall panel, and also comprises a plurality of screen frames arranged equidistantly and side by side from top to bottom, the screen frames correspond to the plurality of screens one by one, and a plurality of connecting mechanisms I are arranged side by side from front to back on the left and right sides of each of the screen frames, the screen frames are slidably connected to the screen box through the connecting mechanism I, each of the screens is located on the inner side of the corresponding screen frame, and a plurality of connecting mechanisms II are movably connected to each of the front and rear sides of each of the screens from left to right in parallel, the screens are elastically connected to the screen frame through the connecting mechanism II, a plurality of follower mechanisms are arranged side by side from left to right on the front and rear sides of each of the screen frames, and each follower mechanism comprises two The projection of the vertical plane is an L-shaped structure of the bottom plate, the two bottom plates are in a centrally symmetrical state, and a driven mechanism including a driven rod is arranged between the two bottom plates, and a front-to-rear axial follower rod is respectively arranged on the upper and lower sides of each of the driven mechanisms, and the two follower rods are respectively fixedly connected to the horizontal sections of the two bottom plates, and a slide groove I is penetrated through each of the bottom plates, and a plurality of through grooves are penetrated through each of the screen frames from left to right for the slide groove I, and a plurality of vibration net frames are arranged in parallel on the lower side of each of the screens from left to right, and the plurality of vibration net frames correspond to the plurality of through grooves one by one, and the corresponding through grooves and slide groove I are respectively penetrated at the front and rear ends of each vibration net frame, and the front and rear ends of each vibration net frame and each follower rod are in the same vertical plane with the corresponding follower rod, and the central axis of each follower rod is perpendicular to the central axis of the follower rod.

[0011] Preferably, the line connecting the two follower rods in each of the follower mechanisms is perpendicular to the length side of the corresponding screen frame, the line connecting the two vibration frames in each follower mechanism is parallel to the length side of the corresponding screen frame, and in multiple follower mechanisms that are in the same vertical plane and correspond to a single screen frame, the central axes of two adjacent follower rods are perpendicular to each other.

[0012] Preferably, a support plate is arranged between the two bottom plates in each of the following mechanisms, a positioning shaft is fixedly connected to the lower end of the support plate, the positioning shaft is slidably connected to the vibration grid frame, and a compression spring I is sleeved on the outer side of the positioning shaft, and the two axial ends of the compression spring I are respectively abutted against the support plate and the vibration grid frame, each of the support plates and the corresponding vibration grid frame protruding out of the bottom plate are in the same vertical plane, and when the compression spring I is not affected by external force, the midpoint of the line between the two follower rods in a single following mechanism coincides with the midpoint of the line between the two vibration grid frames in the single following mechanism.

[0013] Preferably, each of the driven mechanisms includes a positioning tube fixedly connected to the outer end face of the screen box, a driven tube is sleeved on the outer side of the positioning tube, the driven tube is rotatably connected to the positioning tube, and a transmission rod is coaxially fixedly connected to the inner side of the driven tube, a plurality of through holes are opened through a rectangular array on the screen box, the plurality of through holes correspond one-to-one to a pair of transmission rods, and each of the transmission rods extends into the screen box through the through holes, and each transmission rod is fixedly connected to the driven rod at one end away from the driven tube, and a driving mechanism is commonly arranged between the plurality of driven tubes corresponding to each of the screen frames, the driving mechanism includes a driving motor fixedly connected to the outer end face of the screen box, and a driving wheel is fixedly connected to the output shaft of each driving motor.

[0014] Preferably, the driving motor also includes a transmission belt, each of the transmission belts is sleeved on the outer side of the driven tube and the driving wheel corresponding to a single screen frame, and a limiting wheel is also abutted against the lower side of each transmission belt, and the limiting wheel is rotatably connected to the screen box, and the transmission belt is interference fit with the driving wheel and the driven tube through the limiting wheel.

[0015] Preferably, each of the connecting mechanisms I includes a positioning rod for fixedly connecting to the screen box, a compression spring II is sleeved on the outside of the positioning rod, and a positioning nut is screwed on one end of each of the positioning rods away from the corresponding screen frame, and each of the screen frames is provided with a plurality of positioning holes on the left and right sides respectively and in parallel from front to back, the plurality of positioning holes correspond one-to-one to the plurality of positioning rods, and each of the positioning rods is inserted into the positioning hole, and the two axial ends of each compression spring II are respectively in contact with the screen box and the positioning nut.

[0016] Preferably, each of the connecting mechanisms II includes a movable rod, a slide groove II is formed on the movable rod, and a limit rod is inserted into each of the slide grooves II, the limit rod is fixedly connected to the adjacent follower mechanism, and each of the movable rods has a limit nut screwed on one end away from the vibration grid frame, and a compression spring III is sleeved on the outer side of each of the movable rods, and the two axial ends of the compression spring III are respectively in contact with the follower mechanism and the limit nut.

[0017] Preferably, a plurality of notched grooves are respectively penetrated and equidistantly arranged at the upper ends of the front and rear sides of each vibration grid frame from left to right, and the plurality of notched grooves correspond to a plurality of movable rods one by one, and each of the movable rods is movably connected to the screen through a connecting mechanism III on the side close to the screen, and each of the movable rods penetrates the notched groove and protrudes into the inner side of the screen box, and when the lower end face of the movable rod abuts against the lower end of the notched groove, the central axis of the limit nut is perpendicular to the vertical plane.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In actual use, the present invention cooperates with the follower rod through the driven rod, so that the screen frame can continuously make left and right reciprocating linear motion under the drive of the driven mechanism, so as to utilize the gravitational potential energy of the screened material itself to realize the movement separation between the screened material and the screen, thereby avoiding the accumulation of the screened material on the screen to block the screen holes, and allowing the screened material to be spread on the screen to expand the contact area with the screen, thereby ensuring the screening efficiency, and at the same time, allowing the screened material with a larger particle size to continue to move above the screen to reach the expected position and meet the transportation conditions. In addition, by utilizing the friction resistance between the screened material and the screen, by restricting the movement speed of the screen itself, and in combination with a faster screening efficiency, it can be ensured that the screened material with a smaller particle size can be screened at the expected position, thereby avoiding the mixing of the screened material with a smaller particle size and the screened material with a larger particle size into the expected position for transportation.

[0020] The present invention arranges a vibrating frame below the screen and constrains the end of the vibrating frame to be in the same vertical plane with the driven rod. The gravitational potential energy of the screen itself can be utilized. After the driven rod cancels the support force on the vibrating frame, that is, cancels the upward support force on the screen, the screen can fall quickly, thereby utilizing the movement separation between the screen and the screened material, so that the screened material can impact the screen holes, thereby quickly completing the screening process and improving the screening efficiency.

[0021] The present invention can fully complete the screening process by arranging a driven rod, a follower rod and a vibrating grid frame. Compared with the prior art in which the screen box is vibrated as a whole to complete screening, not only the vibration frequency of the screen is higher, which is more in line with the screening requirements for small particle size screening objects, but also the overall low-power driving mechanism can be used to drive the driven rod to rotate, which can effectively reduce the requirements for equipment and energy. At the same time, the screen does not participate in the vibration process, which can effectively reduce the quality requirements for the overall equipment. In addition, this can effectively reduce the vibration impact of the screen box vibration on the overall sand making building steel structure during the overall production process, thereby effectively improving the noise problem.

[0022] Instruction Manual

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the overall structure of the screen box of the present invention.

[0025] Figure 3 It is a schematic diagram of the connection between the screen and the screen frame of the present invention.

[0026] Figure 4 It is a schematic diagram of the position relationship between the screen box and the vibration grid frame of the present invention.

[0027] Figure 5 It is a schematic diagram of the connection between the follower mechanism and the limit rod of the present invention.

[0028] Figure 6 It is a schematic diagram of the positional relationship between the transmission mechanism and the follower mechanism of the present invention.

[0029] Figure 7 It is a schematic diagram of the matching relationship between the positioning tube and the driven tube of the present invention.

[0030] Figure 8 It is a schematic diagram of the overall structure of the driving mechanism of the present invention.

[0031] Fig. 9 It is a schematic diagram of the position relationship between the support plate and the compression spring I of the present invention.

[0032] Fig.10 It is a schematic diagram of the overall structure of the connecting mechanism I of the present invention.

[0033] Fig.11 It is a schematic diagram of the coordination relationship between the connection mechanism II and the connection mechanism III of the present invention.

[0034] In the figure: 1, screen box; 101, rear wall; 102, front wall; 103, connecting rod; 2, driving mechanism; 201, driving motor; 202, driving wheel; 203, transmission belt; 204, limiting wheel; 3, screen frame; 4, screen; 5, driven mechanism; 501, driven rod; 502, transmission rod; 503, positioning tube; 504, driven tube; 6, connecting mechanism III; 7, connecting mechanism II; 701, movable rod; 702, Compression spring III; 703, limit nut; 704, slide groove II; 8, support plate; 9, vibration grid; 10, notch groove; 11, through groove; 12, follow-up mechanism; 1201, bottom plate; 1202, slide groove I; 1203, follow-up rod; 13, positioning hole; 14, positioning shaft; 15, compression spring I; 16, connecting mechanism I; 1601, positioning nut; 1602, compression spring II; 1603, positioning rod; 17, limit rod. DETAILED DESCRIPTION

[0035] 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.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Please refer to Figure 1-11 A multi-stage screening device for an integrated sand making building is consistent with the existing vibrating screen structure in that the device includes a screen box 1 consisting of a front wall panel 102 and a rear wall panel 101, and the front wall panel 102 and the rear wall panel 101 are fixedly connected by a connecting rod 103.

[0038] It should be noted that if Figure 2 As shown, the connecting rod 103 has two forms, one of which is a polygonal structure, the main purpose of which is to connect the front wall panel 102 and the rear wall panel 101, and the other is a cylindrical structure, which protrudes from the screen box 1. In addition to the effect of connecting the front wall panel 102 and the rear wall panel 101, the part protruding from the screen box 1 can also be used as a fixing point of the device, so as to connect the screen box 1 with the steel structure frame of the existing sand making building, thereby fixing the screen box 1.

[0039] At the same time, if Figure 1 As shown, a plurality of sieves 4 are arranged equidistantly from top to bottom in the screen box 1, and the screening level of each screening is different, that is, the diameter of the sieve holes of the plurality of sieves 4 from top to bottom gradually decreases. At the same time, each sieve 4 is constrained to be in an inclined state, which enables the prior art device to utilize the gravitational potential energy of the screened material itself during the vibration of the screen 4, and cooperate with the inclined surface to realize the rolling of the screened material, thereby improving the screening efficiency, and enabling the screened material with a larger particle size that cannot enter under the screen 4 to move to a specific position of the screen 4 according to its own gravitational potential energy and be received by the hopper located on one side of the screen 4, so as to be transported to the next processing process.

[0040] Therefore, the device constrains the height of the left side of each screen 4 to be greater than the height of the right side, and the corresponding hopper is set on the right side of the screen box 1, which allows the screened material to move from the left side of the screen 4 to the right side and enter the hopper.

[0041] Different from the prior art devices, Figure 1 , Figure 3 , Figure 4 As shown, the device has multiple vibrating frames 9 arranged in parallel from left to right under each screen 4, and the screen 4 is hit by the up and down movement of the vibrating frames 9, thereby utilizing the movement separation between the screen 4 and the screened material during the up and down movement, and cooperating with the inertia of the screened material itself, so that the screened material can impact the screen 4 again during the hitting process, thereby realizing the screening process of the screen 4 on the screened material.

[0042] At the same time, the device is equipped with multiple screen frames 3 arranged equidistantly from top to bottom inside the screen box 1, constraining the multiple screen frames 3 to correspond one to one with the multiple screens 4, and the screens 4 are located inside the screen frames 3. The screens 4 are elastically connected to the screen frames 3 through the connecting mechanism II7 so that the screens 4 can move upward relative to the screen frames 3 to achieve the movement separation between the screens 4 and the screened object.

[0043] Furthermore, the device has a plurality of connection mechanisms Ⅰ16 arranged side by side from front to back on the left and right sides of each screen frame 3, and each screen frame 3 is slidably connected to the screen box 1 through the connection mechanism Ⅰ16, which enables the screen frame 3 to make a left and right linear motion relative to the screen box 1, thereby changing the position of the screened material by moving the screen frame 3 left and right, and cooperating with the gravitational potential energy of the screened material itself to enable the screened material to move to the right side of the screen 4. At the same time, this move can further strengthen the motion separation between the screened material and the screen box 1 through the continuous left and right reciprocating linear motion of the screen frame 3, and use the inertia of the screened material itself to make the screened material evenly spread on the upper side of the screen 4, thereby accelerating the screening efficiency when the screened material impacts the screen 4 from above, and avoiding a large amount of screened material from being enriched at a certain position of the screen 4 and blocking the screen holes.

[0044] Specifically, Figure 1 , Figure 3 , Fig.10 As shown, the connecting mechanism Ⅰ16 includes a fixing rod for fixingly connecting to the screen box 1, and positioning holes 13 are opened on the left and right sides of each screen frame 3 for the fixing rod, and each fixing rod is inserted into the corresponding positioning hole 13. The positioning hole 13 has a restraining effect on the positioning rod 1603, so that the screen frame 3 can only make left and right linear movements relative to the screen box 1.

[0045] At the same time, a positioning nut 1601 is screwed on the end of the fixed rod away from the screen frame 3, and a compression spring II 1602 is sleeved on the outside of the fixed rod. By constraining the two axial ends of the compression spring II 1602 to abut against the positioning nut 1601 and the screen frame 3 respectively, the compression spring II 1602 can be used to quickly reset the screen frame 3, thereby realizing the separation of the screen 4 from the screened object during the left and right movement.

[0046] In practice, when the screen frame 3 is initially pushed to the left, the screen frame 3 moves to the left. At this time, the compression spring II 1602 on the left is compressed. When the pushing force on the screen frame 3 is removed, the compression spring II 1602 releases the stored elastic potential energy, and the screen frame 3 can quickly return to the right. Correspondingly, when the screen frame 3 is initially pushed to the right, the screen frame 3 can quickly return to the left.

[0047] It should be noted that, since the screen frame 3 of the device can be subjected to a leftward driving force as well as a rightward driving force, and when the screen frame 3 is subjected to an active driving force, its movement stroke cannot be very fast. Therefore, when the screen frame 3 is subjected to an active driving force, the sieved material on the upper side of the screen 4 will be affected by the friction resistance and move synchronously with the screen 4. Therefore, this measure can curb the falling range of the sieved material on the upper side of the screen 4 whose particle size is smaller than the sieve hole, so that it is enriched on the left side of the screen 4, and only a part of the sieved material with a particle size larger than the sieve hole remains above the screen 4, and it continues to move to the right and is thus enriched on the right side of the screen 4.

[0048] It should be noted that due to the existence of compression spring II 1602, when the screen frame 3 is reset to near the initial position, the compression springs II 1602 on both sides will continuously act on the side ends of the screen frame 3. This can make the screen frame 3 in this state perform continuous and high-frequency reciprocating linear motion, thereby further avoiding the sieve holes being blocked by the screened material and accelerating the screening efficiency.

[0049] Specifically, Figure 3 , Fig.11 As shown, the connecting mechanism II7 includes a movable rod 701, and the movable rod 701 is movably connected to the screen 4 through the connecting mechanism III6 at one end thereof close to the screen 4, and a notch groove 10 is opened on the screen frame 3 for the movable rod 701 to penetrate, and the movable rod 701 is located in the notch groove 10.

[0050] At this time, by opening a slide groove II 704 through the movable rod 701 and inserting a limit rod 17 into the slide groove II 704, the purpose of moving the screen 4 up and down can be achieved under the premise that the limit rod 17 is fixedly connected to the screen frame 3. During the up and down movement of the screen 4, the single connecting mechanism II 7 swings up and down.

[0051] At the same time, in the device, a limiting nut 703 is screwed on the end of each movable rod 701 away from the vibration frame 9, and a compression spring III 702 is sleeved on the outside of each movable rod 701, and the two axial ends of the compression spring III 702 are respectively in contact with the screen frame 3 and the limiting nut 703. At this time, when the screen 4 moves upward and deforms, the movable rod 701 can be pulled to move in the direction away from the screen box 1, so that the compression spring III 702 is compressed. Similarly, when the force forcing the screen 4 to move upward is removed, the compression spring III 702 releases its elastic potential energy, and the screen 4 can fall quickly, thereby realizing the movement separation between the screen 4 and the screened object, and achieving the purpose of the screen object re-impacting the screen 4.

[0052] It should be noted that, in practice, if the falling position of the screen 4 is not constrained, then due to inertia, after the screen 4 falls to the initial position, it will continue to fall and continue to swing up and down. At this time, although the separation time between the screened material and the screen 4 is prolonged and the screened material can obtain a greater impact potential energy, the screen 4 will feed back a greater reaction force to the screened material, and the screened material will bounce around at this time, causing the landing point of the screened material to deviate from the expected range.

[0053] Therefore, when the lower end face of the movable rod 701 of the present device is constrained to abut against the lower end of the notch groove 10, the central axis of the limiting nut 703 is perpendicular to the vertical plane, that is, after the upward pushing force applied to the screen 4 is cancelled, when the screen 4 is reset to its initial position, the movable rod 701 will impact the lower end of the notch groove 10, and the collision between the movable rod 701 and the screen box 1 will interfere with the movement inertia of the screen 4 during the falling process, thereby preventing the screen 4 from providing multiple and continuous upward impact forces to the screened object.

[0054] Specifically, in practice, in order to control the left and right movement of the screen frame 3, the device has a plurality of follower mechanisms 12 arranged in parallel from left to right on the front and rear sides of each screen frame 3, such as 3, Figure 4 , Figure 5 , Figure 6 As shown, the follower mechanism 12 includes a bottom plate 1201 fixedly connected to the screen frame 3 by bolts.

[0055] Each follower mechanism 12 is provided with two bottom plates 1201 with an L-shaped structure on the vertical plane, and the two bottom plates 1201 are in a centrally symmetrical state, that is, the projections of the two bottom plates 1201 on the vertical plane together form a rectangular structure, which enables the horizontal sections of the two bottom plates 1201 to be in the same vertical plane. At the same time, the limit rod 17 is fixedly connected to the bottom plate 1202 inside the follower mechanism 12 to achieve fixation.

[0056] Therefore, by arranging the corresponding follower mechanism 5 between the two bottom plates 1201, and arranging a follower rod 1203 on the upper and lower sides of the follower mechanism 5, the purpose of fixing the two follower rods 1203 to the horizontal sections of the two bottom plates 1201 can be achieved. At this time, it is only necessary to constrain the follower mechanism 5 to include a transmission rod 502, and the transmission rod 502 is fixedly connected to the follower rod 501 at one end close to the screen frame 3, and the central axis of the follower rod 501 is perpendicular to the central axis of the follower rod 1203, and the follower rod 501 and the follower rod 1203 are in the same vertical plane, so that when the transmission rod 502 drives the follower rod 501 to rotate, the follower rod 1203 is forced to drive the screen frame 3 to make a left and right linear motion through the contact between the follower rod 501 and the follower rod 1203. At the same time, since the transmission rod 502 is located between the two bottom plates 1201, as the transmission rod 502 rotates, the projected length of the driven rod 501 on the vertical plane also gradually changes, that is, as the transmission rod 502 rotates, the driven rod 501 can be separated from the follower rod 1203 after rotating to a certain amplitude, thereby achieving the purpose of canceling the horizontal thrust on the follower rod 1203, that is, the screen frame 3.

[0057] Furthermore, the device constrains the line connecting the two follower rods 1203 in a single follower mechanism 12 to be perpendicular to the length side of the corresponding screen frame 3, and the central axis of the transmission rod 502 coincides with the midpoint of the line connecting the two follower rods 1203 in the corresponding follower mechanism 12. This ensures that the movement lengths of the two corresponding follower rods 1203 are consistent under the drive of the transmission rod 502, that is, the left and right swing amplitudes of the screen frame 3 are consistent, thereby curbing the distance that the screened material moves to the right on the screen 4.

[0058] Furthermore, since the two axial ends of the compression spring II 1602 are respectively in contact with the screen frame 3 and the positioning nut 1601, and the positioning nut 1601 is screwed with the positioning rod 1603, the initial compression amount of the single compression spring II 1602 can be changed by rotating the positioning nut 1601 to change the distance between it and the screen frame 3. Therefore, under the premise that the left and right movement stroke distance of the screen frame 3 remains unchanged, the corresponding elastic potential energy accumulated in the compression spring II 1602 in the reset extreme state is changed, thereby controlling the reset speed of the screen frame 3, as well as the frequency and duration of its left and right swinging after resetting.

[0059] Specifically, in order to control the up and down swinging of the vibration net frame 9, the present device is provided with a slide groove Ⅰ1202 on each bottom plate 1201, and a through groove 11 is provided on each screen frame 3 for the slide groove Ⅰ1202. At this time, by constraining multiple vibration net frames 9 to correspond to multiple through grooves 11 one by one, the front and rear ends of a single vibration net frame 9 can be penetrated by the corresponding through grooves 11 and the slide groove Ⅰ1202 can protrude out of the screen frame 3. At this time, a vibration net frame 9 is respectively arranged on the left and right sides of each transmission rod 502. Therefore, it is only necessary to further constrain the front and rear ends of the vibration net frame 9 to be in the same vertical plane with the driven rod 501. Under the premise that the screen frame 3 remains stationary, the transmission rod 502 can drive the vibration net frame 9 to move up and down during the movement of the driven rod 501 to achieve the beating of the screen 4 through the abutment effect between the driven rod 501 and the end of the vibration net frame 9.

[0060] It should be noted that, in practice, since the transmission rod 502 continuously rotates in one direction, the driven rod 501 will inevitably apply thrusts in completely opposite directions to the two ends of the vibration grid frames 9 on its left and right sides. This will result in only one vibration grid frame 9 being able to move upward and hit the screen 4 under the push of the driven rod 501.

[0061] Therefore, if Figure 3 , Figure 4 , Fig. 9 As shown, the device has a sliding hole extending through the bottom of each driven rod 501, and a positioning shaft 14 is inserted into the sliding hole. The upper end of the positioning shaft 14 is fixedly connected to a support plate 8, and the support plate 8 and the ends of the corresponding two vibration grid frames 9 are in the same vertical plane.

[0062] At this time, it is only necessary to arrange a compression spring Ⅰ15 outside the positioning shaft 14, and the two axial ends of the constraint compression spring Ⅰ15 are respectively in contact with the support plate 8 and the vibration grid frame 9. Then, in practice, if the transmission rod 502 rotates clockwise, it can first drive the vibration grid frame 9 on its left side to hit the screen 4 upward, and then, it can press the vibration grid frame 9 on its right side downward to compress the compression spring Ⅰ15 downward.

[0063] At the same time, a single support plate 8 abuts against the ends of the corresponding two vibration grid frames 9 at the same time, so that any vibration grid frame 9 exerts downward pressure on the support plate 8, which can cause the compression spring Ⅰ15 to be compressed, so that multiple vibration grid frames 9 can continuously oscillate the screen 4 up and down, which is more in line with the actual requirements for the small particle size screening process.

[0064] It should be emphasized that, in practice, during the clockwise rotation of the transmission rod 502, the vibration grid frame 9 on the left side slaps the screen 4 upward, driving the screen 4 to move upward. At this time, the compression spring III 702 is compressed, and when the driven rod 501 is separated from the abutment effect with the end of the vibration grid frame 9 on the left side, the elastic potential energy accumulated in the compression spring III 702 is released, and the screen 4 drives the vibration grid frame 9 on the left side to fall rapidly. During this movement, a large-stroke, low-frequency slapping vibration process can be realized on the screen 4, and the screened material accumulated above the screen 4 can be quickly flattened. In contrast, when the transmission rod 502 continues to rotate, forcing the compression spring I15 to be compressed, as the transmission rod 502 continues to rotate, the driven rod 501 is separated from the abutment effect with the end of the vibration grid frame 9 on the right side, and the compression spring I15 continues to release its elastic potential energy, and the vibration grid frame 9 quickly impacts the screen 4 upward. At this time, due to the existence of the compression spring III 702, the screen 4 cannot fluctuate up and down significantly. Therefore, the vibration grid frame 9 on the right side will be subjected to a large downward reaction force, so that the compression spring I15 can be compressed again. This process is repeated to achieve short-stroke, high-frequency impact of the right-side vibration grid frame 9 on the screen 4. This process can quickly screen the spread out screening materials.

[0065] It should be noted that, in the process where the actual transmission rod 502 drives the driven rod 501 to rotate clockwise, when the driven rod 501 abuts against the end of the vibration grid frame 9 on the left, the pressure applied by the driven rod 501 to the end of the left vibration grid frame 9 can be decomposed into vertical upward and horizontal rightward components. Correspondingly, when the driven rod 501 abuts against the end of the vibration grid frame 9 on the right, the pressure applied by the driven rod 501 to the end of the right vibration grid frame 9 can be decomposed into vertical downward and horizontal leftward components.

[0066] Therefore, if Figure 6As shown, the device constrains multiple driven mechanisms 5 that are in the same vertical plane and correspond to a single screen frame 3, and the angle between the central axes of two adjacent driven rods 501 is 90°. This makes it possible for one half of the driven rods 501 corresponding to a single screen frame 3 in the same vertical plane to abut against the relatively lower follower rod 1203, and the other half of the driven rods 501 to abut against the relatively left end of the vibration frame 9. At this time, as the transmission rod 502 rotates, the driven rod 501 abutting against the follower rod 1203 will be the screen frame. The mesh frame 3 provides a thrust to the left, and the driven rod 501 abutting against the end of the vibrating mesh frame 9 will provide a thrust to the right for the mesh frame 3, and the thrust to the left on the mesh frame 3 is greater than the thrust to the right. Therefore, at this time, the mesh frame 3 can meet the expected leftward movement, and the vibrating mesh frame 9 can move upward quickly (assuming that the mesh frame 3 remains stationary, the driven rod 501 rotates upward 45° to separate from the corresponding vibrating mesh frame 9, then when the mesh frame 3 moves to the left, the driven rod 501 rotates upward less than 30° to separate from the corresponding vibrating mesh frame 9). Similarly, when half of the driven rod 501 abuts against the relatively upper follower rod 1203, and the other half of the driven rod 501 abuts against the end of the vibrating mesh frame 9 on the right, as the transmission rod 502 rotates, the mesh frame 3 can move to the right, and the vibrating mesh frame 9 can move quickly to the left.

[0067] It should be emphasized that, in the actual process of the transmission rod 502 driving the driven rod 501 to rotate clockwise, when half of the driven rod 501 abuts against the relatively upper follower rod 1203, and the other half of the driven rod 501 abuts against the end of the vibration frame 9 on the left, the screen frame 3 can move to the right as expected, and the vibration frame 9 will delay the upward movement time (assuming that the screen frame 3 remains stationary, the driven rod 501 rotates upward 45° to separate from the corresponding vibration frame 9, then when the screen frame 3 moves to the right, the vibration frame 9 can move upward relative to the screen frame 3 only after the driven rod 501 rotates upward more than 45°). At the same time, the time for the screen 4 to reset to the left is extended, and the screen 4 cannot be reset quickly. Similarly, when one half of the driven rod 501 abuts against the relatively lower follower rod 1203, and the other half of the driven rod 501 abuts against the end of the vibration frame 9 on the right, as the transmission rod 502 rotates, the screen frame 3 can move to the left, and the vibration frame 9 slowly moves downward. At the same time, the time for the screen 4 to reset to the right is extended.

[0068] Therefore, in practice, if in the initial state, one half of the driven rods 501 abut against the relatively lower follower rod 1203, and the other half of the driven rods 501 abut against the relatively left end of the vibration net frame 9, then as the transmission rod 502 rotates, the specific movement process of the screen 4 is that the screen 4 first moves to the left at a medium speed and quickly moves upward, then the screen 4 continues to move to the left at a medium speed and quickly moves downward (the driven rod 501 separates from the left vibration net frame 9), and then the screen 4 quickly resets to the right and continuously jumps (the driven rod 501 abuts against the relatively left end of the vibration net frame 9). The following follower rod 1203 at the bottom is separated), and then the screen 4 moves to the right at medium speed (the driven rod 501 abuts against the left vibration frame 9 and the upper follower rod 1203), and then the screen 4 is reset to the left and moves upward quickly (the driven rod 501 is separated from the upper follower rod 1203), and then, the screen 4 moves downward quickly and jumps continuously (the driven rod 501 is separated from the left vibration frame 9), and finally, as the transmission rod 502 continues to rotate, the screen 4 reversely runs the above steps until a complete cycle is formed.

[0069] Specifically, the transmission mechanism of the device includes a positioning tube 503 fixedly connected to the outer end surface of the screen box 1, namely the front wall panel 102 and the rear wall panel 101, and a driven tube 504 is sleeved on the outer side of the positioning tube 503, the driven tube 504 is rotatably connected to the positioning tube 503, and the driven tube 504 is coaxially fixedly connected to the transmission rod 502.

[0070] At the same time, if Figure 7 As shown, bearings are provided between the positioning tube 503 and the driven tube 504, and between the positioning tube 503 and the transmission rod 502 to reduce friction loss during rotation. At the same time, the diameter of the driven tube 504 is larger than the diameter of the transmission rod 502, which is beneficial to increase the torque applied to the transmission rod 502 and ensure that the driven rod 501 can drive the screen frame 3 and the vibration frame 9 to move.

[0071] Specifically, Figure 1 As shown, the device is provided with a driving mechanism 2 between multiple transmission mechanisms corresponding to a single screen frame 3 and located in the same vertical plane. Figure 8 As shown, the driving mechanism 2 includes a driving motor 201 fixedly connected to the outer end surface of the screen box 1, and the output shaft of the driving motor 201 is keyed to a driving wheel 202.

[0072] A transmission belt 203 is commonly sleeved on the outer sides of multiple driven tubes 504 and multiple driving wheels 202 corresponding to each screen frame 3, and the purpose of using the driving wheel 202 to drive the driven tube 504 to rotate is achieved through the transmission belt 203. At the same time, the device also has multiple grooves on the inner side of the transmission belt 203, and corresponding matching strips are arranged on the outer sides of the driving wheel 202 and the driven tube 504 for the grooves, and the transmission belt 203 can achieve the transmission effect through the mutual meshing of the grooves and the matching strips.

[0073] Furthermore, the device has a limiting wheel 204 disposed on the lower side of each transmission belt 203 , the limiting wheel 204 is rotatably connected to the screen box 1 , and the transmission belt 203 is interference-fitted with the driving wheel 202 and the driven tube 504 through the limiting wheel 204 .

[0074] In actual use, the present invention:

[0075] First, the driving motor 201 is turned on. Driven by the driving motor 201, the transmission belt 203 drives the corresponding multiple driven tubes 504 to rotate synchronously. At this time, half of the driven rods 501 corresponding to a single screen frame 3 in the same vertical plane abut against the follower rod 1203 (assuming that it is the lowermost follower rod 1203), and the other half of the driven rod 501 abuts against the end of the vibration frame 9 (assuming that it is the leftmost vibration frame 9);

[0076] Afterwards, in the process that the transmission rod 502 drives the driven rod 501 to rotate 90°, the screen 4 moves to the left at a medium speed and moves upward quickly - the screen 4 quickly resets downward - the screen 4 quickly resets to the right - the screen 4 continues to oscillate;

[0077] Then, in the process that the transmission rod 502 drives the driven rod 501 to continue to rotate 90°, the screen 4 moves rightward at a medium speed—the screen 4 moves upward quickly and the screen 4 returns to the left at a slow speed—the screen 4 continues to oscillate;

[0078] Afterwards, as the transmission rod 502 drives the driven rod 501 to continue rotating 90°, the screen 4 moves rightward at a medium speed and quickly downward—the screen 4 quickly resets upward—the screen 4 quickly resets leftward—the screen 4 continues to oscillate up and down with a large amplitude and high frequency;

[0079] Then, in the process that the transmission rod 502 drives the driven rod 501 to continue to rotate 90 degrees, the screen 4 moves to the left at a medium speed - the screen 4 moves downward quickly and the screen 4 returns to the right at a slow speed - the screen 4 continues to oscillate up and down with a large amplitude and high frequency;

[0080] Finally, the corresponding transfer equipment is turned on to tilt the crushed sieved material to the left end of the uppermost screen 4. As the screening process continues, the sieved materials of different particle sizes are transferred to specific processing steps or returned to the crushing equipment for re-crushing.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage screening device for an integrated sand making building, comprising a screen box (1) consisting of a front wall plate (102) and a rear wall plate (101), wherein the front wall plate (102) and the rear wall plate (101) are fixedly connected via a connecting rod (103), and a plurality of screens (4) are arranged in parallel and equidistantly from top to bottom between the front wall plate (102) and the rear wall plate (101), characterized in that: It also comprises a plurality of screen frames (3) arranged in parallel and equidistantly from top to bottom, wherein the screen frames (3) correspond to the plurality of screens (4) one by one, and each of the screen frames (3) has a plurality of connecting mechanisms I (16) arranged in parallel from front to back on the left and right sides, respectively, and the screen frames (3) are slidably connected to the screen box (1) via the connecting mechanisms I (16); Each of the sieves (4) is located inside the corresponding sieve frame (3), and a plurality of connecting mechanisms II (7) are movably connected in parallel from left to right on both sides of each of the sieves (4), and the sieves (4) are elastically connected to the sieve frame (3) via the connecting mechanisms II (7); A plurality of follower mechanisms (12) are arranged in parallel from left to right on the front and rear sides of each of the screen frames (3); each follower mechanism (12) comprises two bottom plates (1201) whose vertical planes are projected into an L-shaped structure; the two bottom plates (1201) are in a centrally symmetrical state; and a follower mechanism (5) comprising a follower rod (501) is arranged between the two bottom plates (1201); Each of the driven mechanisms (5) is provided with a front-to-rear axial follower rod (1203) on both upper and lower sides, the two follower rods (1203) are respectively fixedly connected to the horizontal sections of the two bottom plates (1201), and each of the bottom plates (1201) is provided with a sliding groove I (1202); A plurality of through slots (11) are provided on each of the screen frames (3) from left to right to penetrate the slide slot I (1202), and a plurality of vibration net frames (9) are arranged in parallel from left to right on the lower side of each of the screens (4), the plurality of vibration net frames (9) correspond to the plurality of through slots (11) one by one, and the front and rear ends of each vibration net frame (9) respectively penetrate the corresponding through slot (11) and the slide slot I (1202); The front and rear ends of each vibration grid frame (9) and each follower rod (1203) are in the same vertical plane with the corresponding driven rod (501), and the central axis of each driven rod (501) is perpendicular to the central axis of the follower rod (1203).

2. The multi-stage screening device for an integrated sand making building according to claim 1 is characterized in that: The line connecting the two follower rods (1203) in each follower mechanism (12) is perpendicular to the length side of the corresponding screen frame (3), and the line connecting the two vibration frames (9) in each follower mechanism (12) is parallel to the length side of the corresponding screen frame (3); In a plurality of driven mechanisms (5) that are located in the same vertical plane and correspond to a single screen frame (3), the central axes of two adjacent driven rods (501) are perpendicular to each other.

3. The multi-stage screening device for an integrated sand making building according to claim 2 is characterized in that: A support plate (8) is arranged between the two bottom plates (1201) in each follower mechanism (12), a positioning shaft (14) is fixedly connected to the lower end of the support plate (8), the positioning shaft (14) is slidably connected to the vibration grid frame (9), and a compression spring I (15) is sleeved on the outer side of the positioning shaft (14), and two axial ends of the compression spring I (15) are respectively in contact with the support plate (8) and the vibration grid frame (9); Each of the support plates (8) and the portion of the corresponding vibration grid frame (9) protruding outside the bottom plate (1201) are in the same vertical plane, and when the compression spring I (15) is not affected by external force, the midpoint of the line between the two follower rods (1203) in the single follower mechanism (12) coincides with the midpoint of the line between the two vibration grid frames (9) in the single follower mechanism (12).

4. The multi-stage screening device for an integrated sand making building according to claim 1, characterized in that: Each of the driven mechanisms (5) comprises a positioning tube (503) fixedly connected to the outer end surface of the screen box (1), a driven tube (504) is sleeved on the outer side of the positioning tube (503), the driven tube (504) is rotatably connected to the positioning tube (503), and a transmission rod (502) is coaxially fixedly connected to the inner side of the driven tube (504); A plurality of through holes are formed in a rectangular array on the screen box (1), and the plurality of through holes correspond to pairs of transmission rods (502) one by one. Furthermore, each transmission rod (502) extends through a through hole into the screen box (1), and one end of each transmission rod (502) away from the driven tube (504) is fixedly connected to the driven rod (501); A driving mechanism (2) is commonly arranged between the multiple driven pipes (504) corresponding to each of the screen frames (3), the driving mechanism (2) comprising a driving motor (201) fixedly connected to the outer end surface of the screen box (1), and a driving wheel (202) is fixedly connected to the output shaft of each of the driving motors (201).

5. The multi-stage screening device for an integrated sand making building according to claim 4, characterized in that: The driving motor (201) further comprises a transmission belt (203), each of the transmission belts (203) being sleeved on the outer side of the driven tube (504) and the driving wheel (202) corresponding to a single screen frame (3), and a limiting wheel (204) being abutted against the lower side of each transmission belt (203), and the limiting wheel (204) being rotationally connected to the screen box (1), and the transmission belt (203) being interference fit with the driving wheel (202) and the driven tube (504) via the limiting wheel (204).

6. The multi-stage screening device for an integrated sand making building according to claim 1, characterized in that: Each of the connection mechanisms I (16) comprises a positioning rod (1603) for fixedly connecting to the screen box (1), a compression spring II (1602) being sleeved on the outer side of the positioning rod (1603), and a positioning nut (1601) is screwed on one end of each of the positioning rods (1603) away from the corresponding screen frame (3); Each of the screen frames (3) has a plurality of positioning holes (13) extending through the left and right sides from front to back in parallel, and the plurality of positioning holes (13) correspond one to one with the plurality of positioning rods (1603). In addition, each of the positioning rods (1603) is inserted into the positioning hole (13), and the two axial ends of each compression spring II (1602) are respectively in contact with the screen box (1) and the positioning nut (1601).

7. The multi-stage screening device for an integrated sand making building according to claim 1, characterized in that: Each of the connecting mechanisms II (7) comprises a movable rod (701), a slide groove II (704) is formed through the movable rod (701), and a limit rod (17) is inserted into each of the slide grooves II (704), and the limit rod (17) is fixedly connected to the adjacent follower mechanism (12); A limiting nut (703) is screwed to one end of each movable rod (701) away from the vibration grid frame (9), and a compression spring III (702) is sleeved on the outer side of each movable rod (701), and the two axial ends of the compression spring III (702) are respectively in contact with the follow-up mechanism (12) and the limiting nut (703).

8. The multi-stage screening device for an integrated sand making building according to claim 7, characterized in that: A plurality of notched grooves (10) are respectively formed on the upper ends of the front and rear sides of each vibration grid frame (9) and are equidistantly arranged from left to right, the plurality of notched grooves (10) corresponding to the plurality of movable rods (701) one by one, and each movable rod (701) is movably connected to the screen (4) through a connecting mechanism III (6) on a side close to the screen (4); Each movable rod (701) passes through the notch groove (10) and protrudes into the inner side of the screen box (1); and when the lower end surface of the movable rod (701) abuts against the lower end of the notch groove (10), the central axis of the limiting nut (703) is perpendicular to the vertical plane.

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