Centrifugal separation equipment and centrifugal separation method for quartz sand sorting

Abstract

The invention relates to the technical field of quartz sand production, and discloses centrifugal separation equipment and a centrifugal separation method for quartz sand sorting, the centrifugal separation equipment comprises a separation barrel and a driving mechanism, and a separation mechanism is arranged in the separation barrel; the separation mechanism comprises a magnetic separation assembly, a feeding pipe, a discharging pipe, a sealing assembly, an inner sweeping assembly, an outer sweeping assembly, a discharging pipe and two screening barrels, the discharging pipe communicates with the discharging pipe, and the sealing assembly is used for controlling the opening and closing states of a discharging opening of the discharging pipe. According to the quartz sand magnetic separation device, quartz sand can be subjected to multi-stage screening while being subjected to magnetic separation, so that the practicability is greatly improved, meanwhile, the quartz sand screening efficiency is improved in a centrifugal separation mode, and due to the arrangement of an inner sweeping assembly and an outer sweeping assembly, it can be avoided that when the cleaned quartz sand is screened, the quartz sand cannot be cleaned. And meanwhile, the effect that the screened quartz sand is subjected to graded discharging can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand production, in particular to a centrifugal separation device and a centrifugal separation method for quartz sand material selection. Background Art

[0002] Petroleum fracturing sand (quartz sand) is an important oilfield mining material, which plays a key role in the oil well fracturing process. For example, in the oil well fracturing operation, petroleum fracturing sand is injected into the cracks of the oil well, and by increasing the support and permeability of the cracks, it helps the crude oil in the reservoir to flow to the oil well more easily, thereby improving the production capacity of the oil well. The existing petroleum fracturing sand production process is: raw ore → pre-screening → scrubbing → desludging → coarse particle classification → fine particle classification → magnetic separation → concentration → dehydration → drying → screening. A series of processes are used to produce petroleum fracturing sand, but each of the above production steps is divided into independent operation steps; that is, a step requires corresponding equipment to complete, such as coarse particle classification → fine particle classification → magnetic separation, etc., which requires the cooperation of screening machines and magnetic separators to achieve the above steps.

[0003] In order to solve the above problems, Chinese patent CN117599952B discloses a screening device for quartz sand purification, which includes a base, a vibration module, a screening device, an internal intermittent magnetic separation device, an export module and an external intermittent magnetic separation device; through the cooperation of the first screening unit, the second screening unit, the third screening unit, the fine sand storage unit and the magnetic material storage unit group, it is possible to quickly screen the quartz sand and distinguish and export it in different required mesh sizes. At the same time, in conjunction with the internal intermittent magnetic separation device, it is possible to realize how to perform high-speed screening of the quartz sand while simultaneously performing magnetic separation on it, so that screening and magnetic separation are carried out simultaneously; the effect of high production efficiency and fast speed.

[0004] However, when the above technical solution is used, since it is for screening the quartz sand after scrubbing and desludging, the quartz sand is in a wet state when screening. When screening the quartz sand, the quartz sand needs to enter the export module and then be screened at the next level. During this period, since the wet quartz sand has poor fluidity, when the wet quartz sand enters the export module, it is easy to adhere to the inner wall of the export ring and the import cylinder, thereby affecting the subsequent screening effect of the quartz sand, and also affecting the screening efficiency of the quartz sand. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a centrifugal separation device and a centrifugal separation method for quartz sand selection, which can perform magnetic separation on quartz sand while screening the quartz sand, and can also prevent the wet quartz sand from adhering to the screening device and affecting the screening effect and screening efficiency, thereby solving the above-mentioned problems.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a centrifugal separation device, comprising a separation cylinder and a driving mechanism, wherein a separation mechanism is arranged inside the separation cylinder; The separation mechanism includes a magnetic separation component, a feeding pipe, a feeding pipe, a sealing component, an inner cleaning component, an outer cleaning component, a discharging pipe and two screening cylinders. The feeding pipe and the discharging pipe are connected. The sealing component is used to control the opening and closing state of the discharging port of the discharging pipe. The driving mechanism includes an upper cover and a driving assembly, and the driving assembly is used to drive the feeding tube and the upper cover to rotate; and during the rotation of the feeding tube and the upper cover, the inner cleaning assembly can be triggered to clean the inner walls of the two screening cylinders, and the outer cleaning assembly can be triggered to clean the inner wall of the separation cylinder; When the feeding pipe rotates, it can drive the magnetic separation component to work, and when the upper cover rotates, it can drive the two screening cylinders to rotate to achieve centrifugal screening; By lifting the discharge pipe, the discharge port of the discharge pipe can enter one of the screening cylinders and the discharge port of the discharge pipe can enter another of the screening cylinders.

[0007] Preferably, the two screening cylinders are respectively a first screening cylinder and a second screening cylinder, and the first screening cylinder and the second screening cylinder are both provided with a plurality of screening holes, and the diameter of the screening holes on the first screening cylinder is larger than the diameter of the screening holes on the second screening cylinder; A base is provided below the separation cylinder, a hydraulic cylinder is fixedly connected to the base, a top cover is fixedly connected to the output shaft of the hydraulic cylinder, the driving mechanism is provided on the top cover, the driving mechanism comprises an upper cover and a driving assembly, the upper cover is rotatably connected to the top cover, a plurality of circumferentially distributed card blocks are fixedly connected to the bottom of the upper cover, a plurality of circumferentially distributed card slots are provided on the top of the first screening cylinder, the number of the card slots is consistent with the number of the card blocks, and when the top cover is sealed on the top of the separation cylinder, the card blocks can be respectively plugged into the corresponding card slots.

[0008] Preferably, the driving assembly includes a bracket fixedly connected to the top cover, a motor is fixedly connected to the top of the bracket, a driving wheel and a driving gear are coaxially fixedly connected to the output shaft of the motor, a driven wheel is fixedly sleeved on the outer side of the feeding tube, a transmission belt is sleeved between the driving wheel and the driven wheel, a driven gear is fixedly sleeved on the outer side of the upper cover, and the driving gear is meshed with the driven gear.

[0009] Preferably, the separation mechanism further includes a fixing assembly, which includes two fixing frames, and the inner sides of the two fixing frames are rotatably connected with an upper connecting pipe and a lower connecting pipe respectively; the two fixing frames are fixedly connected to the inner wall of the separation cylinder, the upper connecting pipe and the lower connecting pipe are respectively fixedly connected to the first screening cylinder and the second screening cylinder, and the upper connecting pipe and the lower connecting pipe are respectively communicated with the first screening cylinder and the second screening cylinder, one of the fixing frames is distributed between the first screening cylinder and the second screening cylinder, and the other fixing frame is distributed at the bottom of the second screening cylinder.

[0010] Preferably, the inner cleaning assembly comprises a plurality of connecting rods, and the outer end of each connecting rod is fixedly connected to an inner scraper; the plurality of connecting rods are divided into two groups, and the two groups of connecting rods are respectively fixedly connected to the feeding tube and the first fixed frame below the feeding tube, and the two groups of inner scrapers are respectively distributed on the inner sides of the first screening cylinder and the second screening cylinder, and the two groups of inner scrapers are respectively in contact with the inner walls of the first screening cylinder and the second screening cylinder; The external cleaning assembly includes a feed cover and a plurality of support rods, and an outer scraper is fixedly connected to the outer end of each support rod; the feed cover is fixedly connected to the top of the second screening cylinder, and the outer diameter of the feed cover is adapted to the inner diameter of the separation cylinder, and the plurality of support rods are divided into two groups, and the two groups of support rods are respectively fixedly connected to the upper cover and the feed cover, and the two groups of outer scrapers are in contact with the inner wall of the separation cylinder.

[0011] Preferably, the separation mechanism also includes a linkage component, the linkage component includes a plurality of through holes and a plurality of slots, the inner side of each of the through holes is slidably connected with a sliding rod, the top of the sliding rod is fixedly connected with an upper inclined cover, the inner side of each of the slots is plugged with a positioning pin, the top of the positioning pin is fixedly connected with a lower inclined cover, and a circular hole is opened on the lower inclined cover; each of the through holes is opened on the bottom wall of the first screening cylinder, and each of the through holes is distributed at an equal angle, the top end of each of the sliding rods is fixedly connected to the bottom surface of the upper inclined cover, the upper inclined cover is distributed at the bottom of the inner side of the first screening cylinder, each of the slots is opened on the bottom wall of the second screening cylinder, and the position of each slot corresponds to each through hole, the top end of each of the positioning pins is fixedly connected to the bottom surface of the lower inclined cover, the top end of the lower material pipe is fixedly connected to the bottom of the upper inclined cover through the upper connecting pipe, and the bottom end of the lower material pipe is fixedly connected to the top surface of the lower inclined cover, the discharge pipe is fixedly connected to the bottom surface of the lower inclined cover, and the discharge pipe is communicated with the discharge pipe through the circular hole.

[0012] Preferably, the closure assembly comprises a sleeve, which is threadedly assembled on the outside of the discharge pipe through an inner thread groove; the length of the sleeve is matched with the length of the discharge port on the discharge pipe, and the sleeve is located on the inner side of the lower connecting pipe.

[0013] Preferably, the separation mechanism further includes a reset assembly, which includes a plurality of springs, each of which is fixedly connected to a baffle at the bottom; one end of each of the springs is fixedly connected to the bottom of the first screening cylinder, and the other end of each of the springs is respectively fixedly connected to each baffle, each of the baffles is respectively fixedly connected to the bottom end of each sliding rod, and each of the springs is respectively distributed on the outside of each sliding rod.

[0014] Preferably, the magnetic separation assembly includes a magnetic separation cylinder and a magnetic separation shaft, a plurality of stirring rods are fixedly connected to the outer side of the magnetic separation shaft, and a magnetic separation screen is fixedly connected to the inner side of the magnetic separation cylinder; the magnetic separation cylinder is fixedly connected to the top cover, the feed port on the feeding tube is distributed on the inner side of the magnetic separation cylinder, the magnetic separation shaft is fixedly connected to the top surface of the feeding tube, and the magnetic separation shaft and each stirring rod are distributed above the magnetic separation screen, and the feeding tube is rotatably connected to the magnetic separation screen.

[0015] A centrifugal separation method for quartz sand selection uses the above centrifugal separation equipment.

[0016] Compared with the prior art, the present invention provides a centrifugal separation device and a centrifugal separation method for quartz sand selection, which have the following beneficial effects: 1. In the present invention, through the cooperation of the separation mechanism, the driving assembly and the linkage assembly, when selecting the quartz sand, the upper cover, the clamping block and the clamping slot can be driven to rotate by the driving assembly, and then the first screening cylinder is driven to rotate, and the rotation of the first screening cylinder drives the second screening cylinder to rotate under the cooperation of the linkage assembly. At this time, the small and medium-sized particles of quartz sand in the first screening cylinder will be screened out through the sieve holes on the first screening cylinder under the action of centrifugal force, and the large particles of quartz sand will be left in the first screening cylinder. The screened small and medium-sized particles of quartz sand will then enter the second screening cylinder under the action of gravity, and the At this time, the second screening cylinder is also in a rotating state driven by the first screening cylinder. At this time, the small and medium-sized quartz sand particles entering the second screening cylinder will be screened again under the cooperation of centrifugal force and the screen holes of the second screening cylinder; thereby achieving the effect of multi-stage screening of quartz sand. At the same time, the efficiency of quartz sand screening is improved through centrifugal separation, and the problem of quartz sand easily adhering to the separation cylinder when screening the cleaned quartz sand can be avoided. In addition, the quartz sand can be air-dried to a certain extent through centrifugation, which is convenient for subsequent screening and processing.

[0017] 2. The present invention cooperates with the driving assembly, the linkage assembly, the inner cleaning assembly and the outer cleaning assembly. When the driving assembly drives the separation mechanism to work, the inner cleaning assembly and the outer cleaning assembly are also driven to move. The movement of the inner cleaning assembly can clean the inner walls of the first screening cylinder and the second screening cylinder; thereby, the quartz sand blocked at the sieve holes of the first screening cylinder and the second screening cylinder due to the centrifugal force is scraped off, avoiding the problem of blockage at the sieve holes of the first screening cylinder and the second screening cylinder. At the same time, the outer cleaning assembly can clean the inner wall of the separation cylinder, thereby preventing the wet quartz sand from adhering to the inner wall of the separation cylinder and affecting the separation effect.

[0018] 3. The present invention cooperates with the driving assembly, the separation mechanism and the magnetic separation assembly. When the driving assembly is working, the magnetic separation shaft in the magnetic separation cylinder will rotate, thereby driving the stirring rod outside the magnetic separation shaft to move. At this time, the stirring rod can stir the quartz sand in the magnetic separation cylinder; thereby improving the magnetic separation efficiency of quartz sand and the efficiency of quartz sand feeding.

[0019] 4. The present invention cooperates with the separation mechanism, the reset component and the sealing component. When screening the quartz sand, small particles of quartz sand will be directly discharged from the separation cylinder. Later, when it is necessary to discharge the quartz sand in the first screening cylinder and the second screening cylinder, the discharge port on the discharge pipe can be closed by the sealing component, and then the discharge pipe can be lifted upward. At this time, the discharge pipe will drive the discharge pipe to move with the cooperation of the reset component. After the discharge port on the discharge pipe is sent into the first screening cylinder, the quartz sand in the first screening cylinder will be discharged through the discharge port on the discharge pipe. After the quartz sand in the first screening cylinder is completely discharged, the user can release the seal of the discharge port on the discharge pipe, and then the quartz sand in the second screening cylinder can be discharged in the same way; thereby achieving the effect of grading and discharging the screened quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the first viewing angle of the present invention; Figure 2 It is a second viewing angle schematic diagram of the present invention; Figure 3 is a first side sectional view of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 6 for Figure 3 A magnified schematic diagram of the structure at C in the middle; Figure 7 is a second side sectional view of the present invention; Figure 8 It is a schematic diagram of the local structure of the present invention from a first viewing angle; Fig. 9 It is a schematic diagram of the local structure of the present invention from a second viewing angle; Fig.10 It is an enlarged schematic diagram of a local structure in the present invention.

[0021] In the figure: 1, base; 2, hydraulic cylinder; 3, separation cylinder; 4, top cover; 6, separation mechanism; 61, magnetic separation assembly; 611, magnetic separation cylinder; 612, magnetic separation shaft; 613, stirring rod; 614, magnetic separation screen; 621, feeding pipe; 622, first screening cylinder; 623, second screening cylinder; 624, fixing assembly; 6241, fixing frame; 6242, upper connecting pipe; 6243, lower connecting pipe; 625, inner cleaning assembly; 6251, connecting rod; 6252, inner scraper; 626, outer cleaning assembly; 6261, lower cover; 6262, support rod; 6263, outer scraper; 627, slot; 6 31. Feeding tube; 632. Reset assembly; 6321. Spring; 6322. Baffle; 633. Linkage assembly; 6331. Through hole; 6332. Slot; 6333. Slide bar; 6334. Upper inclined cover; 6335. Positioning pin; 6336. Lower inclined cover; 634. Closing assembly; 6341. Threaded groove; 6342. Sleeve; 635. Feeding tube; 7. Driving mechanism; 71. Upper cover; 72. Driving assembly; 721. Bracket; 722. Motor; 723. Driving wheel; 724. Driving gear; 725. Transmission belt; 726. Driven wheel; 727. Driven gear; 73. Block. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-10 , a centrifugal separation device, comprising a separation cylinder 3 and a driving mechanism 7, wherein a separation mechanism 6 is arranged inside the separation cylinder 3; The separation mechanism 6 includes a magnetic separation component 61, a feeding pipe 621, a feeding pipe 631, a closing component 634, an inner cleaning component 625, an outer cleaning component 626, a discharge pipe 635 and two screening cylinders. The discharge pipe 631 is connected to the discharge pipe 635, and the closing component 634 is used to control the opening and closing state of the discharge port of the discharge pipe 635. The driving mechanism 7 includes an upper cover 71 and a driving assembly 72. The driving assembly 72 is used to drive the feeding tube 621 and the upper cover 71 to rotate; and during the rotation of the feeding tube 621 and the upper cover 71, the inner cleaning assembly 625 can be triggered to clean the inner walls of the two screening cylinders, and the outer cleaning assembly 626 can be triggered to clean the inner wall of the separation cylinder 3; When the feeding tube 621 rotates, it can drive the magnetic separation component 61 to work, and when the upper cover 71 rotates, it can drive the two screening cylinders to rotate to achieve centrifugal screening; By lifting the discharge pipe 635, the discharge port of the discharge pipe 631 can enter one screening cylinder while the discharge port of the discharge pipe 635 can enter another screening cylinder.

[0024] Furthermore, the two screening cylinders are respectively a first screening cylinder 622 and a second screening cylinder 623. The first screening cylinder 622 and the second screening cylinder 623 are both provided with a plurality of screening holes. The diameter of the screening holes on the first screening cylinder 622 is larger than the diameter of the screening holes on the second screening cylinder 623. A base 1 is provided below the separation cylinder 3, to which a hydraulic cylinder 2 is fixedly connected, to which a top cover 4 is fixedly connected an output shaft of the hydraulic cylinder 2, a driving mechanism 7 is provided on the top cover 4, and the driving mechanism 7 comprises an upper cover 71 and a driving assembly 72, the upper cover 71 is rotatably connected to the top cover 4, a plurality of circumferentially distributed card blocks 73 are fixedly connected to the bottom of the upper cover 71, a plurality of circumferentially distributed card grooves 627 are provided on the top of the first screening cylinder 622, and the number of the card grooves 627 is the same as that of the card blocks 73, and when the top cover 4 is sealed on the top of the separation cylinder 3, the card blocks 73 can be respectively inserted into the corresponding card grooves 627, so that when the upper cover 71 rotates, the first screening cylinder 622 can be driven to rotate synchronously.

[0025] When in use, pour the quartz sand to be screened into the magnetic separation component 61, and then drive the feeding tube 621 and the upper cover 71 to rotate through the driving component 72. The rotation of the feeding tube 621 drives the magnetic separation component 61 to work. The rotation of the upper cover 71 drives the first screening cylinder 622 to rotate through the cooperation of the block 73 and the slot 627. The rotation of the first screening cylinder 622 will drive the second screening cylinder 623 to rotate with the cooperation of the linkage component 633. The rotation of the feeding tube 621 drives the magnetic separation component 61 to stir and magnetically separate the quartz sand. After that, the quartz sand after magnetic separation will enter the first screening cylinder 622 through the feeding port on the feeding tube 621. Since the first screening cylinder 622 is in a rotating state at this time, the small and medium-sized quartz sand particles in the quartz sand falling into the first screening cylinder 622 will be screened and thrown out under the cooperation of centrifugal force and the first screening cylinder 622, while the large quartz sand particles will be blocked by the sieve holes and remain in the first screening cylinder 622. The thrown out small and medium-sized quartz sand particles will fall into the second screening cylinder 623 under the action of gravity. At this time, the second screening cylinder 623 is also in a rotating state. At the same time, the sieve holes on the second screening cylinder 623 are smaller than the sieve holes on the first screening cylinder 622. Similarly, the small and medium-sized quartz sand particles falling into the second screening cylinder 623 will be screened again. At this time, the small-sized quartz sand particles will be thrown out of the second screening cylinder 623 under the action of centrifugal force, and will be directly discharged after falling to the bottom of the separation cylinder 3, while the medium-sized quartz sand particles will be left in the second screening cylinder 623. During this period, the feeding pipe 621, the upper cover 71, and the first screening cylinder 622 When the first and second screening cylinders 623 rotate, the inner cleaning assembly 625 and the outer cleaning assembly 626 will also be driven to work. The inner cleaning assembly 625 will clean the inner walls of the first and second screening cylinders 622 and 623, thereby preventing quartz sand from clogging the sieve holes of the first and second screening cylinders 622 and 623. The outer cleaning assembly 626 will clean the inner wall of the separation cylinder 3, thereby preventing the quartz sand particles after centrifugal separation from adhering to the inner wall of the separation cylinder 3, thereby affecting the screening efficiency and screening effect. After screening and classifying the small, medium and large quartz sand particles, the driving assembly 72 is stopped, the discharge pipe 635 is lifted, and the movement of the discharge pipe 635 drives the lowering pipe 631 to move, and the lowering port on the lowering pipe 631 moves into the first screening cylinder 622, and the lowering port on the discharge pipe 635 moves into the second screening cylinder 623, and the discharge pipe 635 is closed by the sealing assembly 634. At this time, the quartz sand in the first screening cylinder 622 can be discharged through the lowering pipe 631 and the discharge pipe 635. After the sealing of the upper and lower material ports of the discharge pipe 635 is released by the sealing component 634, the quartz sand in the second screening cylinder 623 can be discharged. After the discharge is completed, the discharge pipe 635 and the discharge pipe 631 will return to their original positions with the cooperation of the reset component 632; thereby, the quartz sand can be magnetically separated and graded, and the problem that the wet quartz sand is easily attached to the separation cylinder 3, thereby affecting the separation effect and separation efficiency, can be avoided, and the graded discharge of the quartz sand can be realized, further improving the practicality; Among them, lifting the discharge pipe 635 upward can be achieved manually or automatically using a mechanical structure in the prior art.

[0026] Further, the driving assembly 72 includes a bracket 721 fixedly connected to the top cover 4, a motor 722 is fixedly connected to the top of the bracket 721, an output shaft of the motor 722 passes through the bracket 721, and is rotatably connected to the top cover 4 through a bearing seat, a driving wheel 723 and a driving gear 724 are coaxially fixedly connected to the output shaft of the motor 722, a driven wheel 726 is fixedly sleeved on the outer side of the feeding tube 621, a transmission belt 725 is sleeved between the driving wheel 723 and the driven wheel 726, a driven gear 727 is fixedly sleeved on the outer side of the upper cover 71, and the driving gear 724 is meshed with the driven gear 727; The driving gear 724 and the driving wheel 723 are driven to rotate by the motor 722, the driving gear 724 drives the driven gear 727 to rotate, the driven gear 727 drives the upper cover 71 to rotate, the driving wheel 723 drives the driven wheel 726 to rotate through the transmission belt 725, and the driven wheel 726 drives the feeding pipe 621 to rotate, so that the feeding pipe 621 rotates in the opposite direction to the upper cover 71, thereby facilitating the external cleaning component 626 to clean the inner wall of the separation cylinder 3, and also facilitating the internal cleaning component 625 at the first screening cylinder 622 to clean the inner wall of the first screening cylinder 622, and the driven gear 727 and the driven wheel 726 have larger teeth and diameters than the driving gear 724 and the driving wheel 723, respectively, so that the rotation speeds of the feeding pipe 621 and the upper cover 71 are inconsistent, thereby avoiding the problem that the motor 722 rotates too fast, thereby affecting the unloading and screening of the quartz sand after magnetic separation.

[0027] Further, the separation mechanism 6 also includes a fixing assembly 624, which includes two fixing frames 6241, and the inner sides of the two fixing frames 6241 are rotatably connected with an upper connecting pipe 6242 and a lower connecting pipe 6243 respectively; the two fixing frames 6241 are fixedly connected to the inner wall of the separation cylinder 3, the upper connecting pipe 6242 and the lower connecting pipe 6243 are fixedly connected to the first screening cylinder 622 and the second screening cylinder 623 respectively, and the upper connecting pipe 6242 and the lower connecting pipe 6243 are communicated with the first screening cylinder 622 and the second screening cylinder 623 respectively, one of the fixing frames 6241 is distributed between the first screening cylinder 622 and the second screening cylinder 623, and the other fixing frame 6241 is distributed at the bottom of the second screening cylinder 623; The upper connecting pipe 6242 and the lower connecting pipe 6243 can improve the stability of the first screening cylinder 622 and the second screening cylinder 623 when they rotate with the cooperation of the two fixing frames 6241. At the same time, the fixing frame 6241 above the second screening cylinder 623 can provide support for a group of connecting rods 6251 on the inner cleaning component 625, so that the inner cleaning component 625 can clean the inner wall of the second screening cylinder 623 when the second screening cylinder 623 rotates.

[0028] Furthermore, the inner cleaning assembly 625 includes a plurality of connecting rods 6251, and the outer end of each connecting rod 6251 is fixedly connected to an inner scraper 6252; the plurality of connecting rods 6251 are divided into two groups, and the two groups of connecting rods 6251 are respectively fixedly connected to the feeding tube 621 and the first fixing frame 6241 below the feeding tube 621, and the two groups of inner scrapers 6252 are respectively distributed on the inner sides of the first screening cylinder 622 and the second screening cylinder 623, and the two groups of inner scrapers 6252 are respectively connected to the first screening cylinder 622 and the second screening cylinder 623. 23; the outer cleaning assembly 626 includes a material discharge cover 6261 and a plurality of support rods 6262, and the outer end of each support rod 6262 is fixedly connected to an outer scraper 6263; the material discharge cover 6261 is fixedly connected to the top of the second screening cylinder 623, and the outer diameter of the material discharge cover 6261 is adapted to the inner diameter of the separation cylinder 3, and the plurality of support rods 6262 are divided into two groups, and the two groups of support rods 6262 are respectively fixedly connected to the upper cover 71 and the material discharge cover 6261, and the two groups of outer scrapers 6263 are in contact with the inner wall of the separation cylinder 3; When the feeding tube 621, the upper cover 71, the first screening cylinder 622 and the second screening cylinder 623 rotate, a group of connecting rods 6251 fixedly connected to the feeding tube 621 in the internal cleaning assembly 625 will be driven to rotate by the feeding tube 621, and the rotation of the connecting rods 6251 drives the inner scraper 6252 to move. At this time, the inner scraper 6252 can clean the inner wall of the first screening cylinder 622, so as to prevent large particles of quartz sand from being blocked near the sieve holes on the first screening cylinder 622. At the same time, when the second screening cylinder 623 rotates, another group of connecting rods 6251 and the inner scraper 6252 are affected by the fixing frame 6241 so that their positions are fixed. At this time, when the second screening cylinder 623 rotates, another group of inner scrapers 6252 can clean the inner wall of the second screening cylinder 623, so as to prevent quartz sand particles larger than the sieve holes of the second screening cylinder 623 from being blocked at the sieve holes of the second screening cylinder 623. When the upper cover 71 and the second screening cylinder 623 rotate, the support rod 6262 and the outer scraper 6263 fixedly connected to the upper cover 71 in the outer cleaning assembly 626 will be driven to move. At this time, the outer scraper 6263 can clean the inner wall of the separation cylinder 3 near the first screening cylinder 622, thereby avoiding the problem that the wet quartz sand will adhere to the inner wall of the separation cylinder 3 when the first screening cylinder 622 centrifuges the quartz sand. When the second screening cylinder 623 rotates, the unloading cover 626 on the top thereof 61 will be driven to rotate, and at this time the support rod 6262 and the outer scraper 6263 fixedly connected to the discharge cover 6261 will move, thereby cleaning the inner wall of the separation cylinder 3 near the second screening cylinder 623, thereby realizing the cleaning of the inner walls of the first screening cylinder 622, the second screening cylinder 623 and the separation cylinder 3, thereby avoiding the problem that the wet quartz sand particles will adhere to or clog the sieve holes on the inner wall of the separation cylinder 3, the first screening cylinder 622 and the second screening cylinder 623 during centrifugal separation.

[0029] Furthermore, the separation mechanism 6 further comprises a linkage assembly 633, which comprises a plurality of through holes 6331 and a plurality of slots 6332, wherein a slide bar 6333 is slidably connected to the inner side of each through hole 6331, an upper inclined cover 6334 is fixedly connected to the top of the slide bar 6333, a positioning pin 6335 is inserted into the inner side of each slot 6332, a lower inclined cover 6336 is fixedly connected to the top of the positioning pin 6335, and a round hole is provided on the lower inclined cover 6336; each through hole 6331 is provided on the bottom wall of the first screening cylinder 622, and each through hole 6331 is distributed at an equal angle, and the top of each slide bar 6333 is fixedly connected to the upper inclined cover 6334. The bottom surface of the cover 6334, the upper inclined cover 6334 is distributed at the inner bottom of the first screening cylinder 622, each slot 6332 is opened on the bottom wall of the second screening cylinder 623, and the position of each slot 6332 corresponds to each through hole 6331, the top end of each positioning pin 6335 is fixedly connected to the bottom surface of the lower inclined cover 6336, the top end of the feed pipe 631 passes through the upper connecting pipe 6242 and is fixedly connected to the bottom of the upper inclined cover 6334, and the bottom end of the feed pipe 631 is fixedly connected to the top surface of the lower inclined cover 6336, the discharge pipe 635 is fixedly connected to the bottom surface of the lower inclined cover 6336, and the feed pipe 631 is connected to the discharge pipe 635 through the circular hole; Since the plurality of slide bars 6333 and the plurality of positioning pins 6335 are respectively distributed in the plurality of through holes 6331 and the plurality of slots 6332, when the first screening cylinder 622 rotates, the first screening cylinder 622 can drive the through holes 6331 and the slide bars 6333 to rotate, and the rotation of the slide bars 6333 can drive the upper inclined cover 6334 to rotate, and the rotation of the upper inclined cover 6334 will drive the discharge pipe 631 to rotate, and the rotation of the discharge pipe 631 will drive the lower inclined cover 6336 to rotate, and the rotation of the lower inclined cover 6336 will drive the second screening cylinder 623 to rotate with the cooperation of the positioning pins 6335 and the slots 6332, thereby realizing the synchronous rotation of the first screening cylinder 622 and the second screening cylinder 623, and further facilitating the subsequent classification and screening of quartz sand.

[0030] Furthermore, the closing component 634 includes a sleeve 6342, which is threadedly assembled on the outside of the discharge pipe 635 through the inner thread groove 6341; the length of the sleeve 6342 is compatible with the length of the discharge port on the discharge pipe 635, and the sleeve 6342 is located on the inner side of the lower connecting pipe 6243; when discharge is required, if the discharge port on the discharge pipe 635 is to be closed, the sleeve 6342 is rotated and moved up to the highest position under the action of the thread, and the sleeve 6342 can close the discharge port on the discharge pipe 635. If the discharge port on the discharge pipe 635 is to be opened, the sleeve 6342 is rotated and moved down under the action of the thread, and the discharge port on the discharge pipe 635 is exposed and opened, thereby avoiding the problem of mixing of quartz sand particles of different particle sizes during discharge, and thus facilitating the user to carry out graded discharge.

[0031] Furthermore, the separation mechanism 6 also includes a reset assembly 632, which includes a plurality of springs 6321, each of which is fixedly connected to a baffle 6322 at the bottom; one end of each spring 6321 is fixedly connected to the bottom of the first screening cylinder 622, and the other end of each spring 6321 is fixedly connected to each baffle 6322, each baffle 6322 is fixedly connected to the bottom end of each slide rod 6333, and each spring 6321 is distributed on the outside of each slide rod 6333; when performing the unloading operation, the discharge pipe 635 can be lifted upward, and at this time, the discharge pipe 635 It will drive the discharge pipe 631 to move, and the movement of the discharge pipe 631 will drive the multiple slide bars 6333 in the linkage assembly 633 to move. The movement of the slide bars 6333 drives the baffle 6322 to squeeze the spring 6321. After the discharge is completed, the discharge pipe 635 is released. At this time, the baffle 6322 and the linkage assembly 633 will return to their original positions under the influence of the spring 6321. At this time, the linkage assembly 633 can close the junction between the first screening cylinder 622 and the discharge pipe 631, and the junction between the second screening cylinder 623 and the discharge pipe 635, thereby facilitating the subsequent first screening cylinder 622 and the second screening cylinder 623 to screen the quartz sand again.

[0032] Further, the magnetic separation assembly 61 includes a magnetic separation cylinder 611 and a magnetic separation shaft 612, a plurality of stirring rods 613 are fixedly connected to the outer side of the magnetic separation shaft 612, and a magnetic separation screen 614 is fixedly connected to the inner side of the magnetic separation cylinder 611; the magnetic separation cylinder 611 is fixedly connected to the top cover 4, the feed port on the feeding tube 621 is distributed on the inner side of the magnetic separation cylinder 611, the magnetic separation shaft 612 is fixedly connected to the top surface of the feeding tube 621, and the magnetic separation shaft 612 and each stirring rod 613 are distributed above the magnetic separation screen 614, and the feeding tube 621 is rotatably connected to the magnetic separation screen 614; The quartz sand that needs to be magnetically separated is poured into the magnetic separation cylinder 611, and then the feeding tube 621 is driven to rotate by the driving component 72. The rotation of the feeding tube 621 drives the magnetic separation shaft 612 to rotate. The rotation of the magnetic separation shaft 612 can magnetically separate the quartz sand in the magnetic separation cylinder 611 with the cooperation of the magnetic separation screen 614. At the same time, the stirring rod 613 on the outside of the magnetic separation shaft 612 can stir the quartz sand in the magnetic separation cylinder 611. The quartz sand after magnetic separation will pass through the magnetic separation screen 614 and fall to the bottom of the magnetic separation cylinder 611. Then, it will enter the separation cylinder 3 through the feed port on the feeding tube 621, and then the quartz sand can be screened and separated, so that the quartz sand can be magnetically separated and screened later.

[0033] A centrifugal separation method for quartz sand selection uses the above centrifugal separation equipment.

[0034] 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 centrifugal separation device, comprising a separation cylinder and a driving mechanism, characterized in that: A separation mechanism is provided inside the separation cylinder; The separation mechanism includes a magnetic separation component, a feeding pipe, a feeding pipe, a sealing component, an inner cleaning component, an outer cleaning component, a discharging pipe and two screening cylinders. The feeding pipe and the discharging pipe are connected. The sealing component is used to control the opening and closing state of the discharging port of the discharging pipe. The driving mechanism includes an upper cover and a driving assembly, and the driving assembly is used to drive the feeding tube and the upper cover to rotate; and during the rotation of the feeding tube and the upper cover, the inner cleaning assembly can be triggered to clean the inner walls of the two screening cylinders, and the outer cleaning assembly can be triggered to clean the inner wall of the separation cylinder; When the feeding pipe rotates, it can drive the magnetic separation component to work, and when the upper cover rotates, it can drive the two screening cylinders to rotate to achieve centrifugal screening; By lifting the discharge pipe, the discharge port of the discharge pipe can enter one of the screening cylinders and the discharge port of the discharge pipe can enter another of the screening cylinders.

2. A centrifugal separation device according to claim 1, characterized in that: The two screening cylinders are respectively a first screening cylinder and a second screening cylinder, and the first screening cylinder and the second screening cylinder are both provided with a plurality of screening holes, and the diameter of the screening holes on the first screening cylinder is larger than the diameter of the screening holes on the second screening cylinder; A base is provided below the separation cylinder, a hydraulic cylinder is fixedly connected to the base, a top cover is fixedly connected to the output shaft of the hydraulic cylinder, the driving mechanism is provided on the top cover, the driving mechanism comprises an upper cover and a driving assembly, the upper cover is rotatably connected to the top cover, a plurality of circumferentially distributed card blocks are fixedly connected to the bottom of the upper cover, a plurality of circumferentially distributed card slots are provided on the top of the first screening cylinder, the number of the card slots is consistent with the number of the card blocks, and when the top cover is sealed on the top of the separation cylinder, the card blocks can be respectively plugged into the corresponding card slots.

3. A centrifugal separation device according to claim 1, characterized in that: The driving assembly includes a bracket fixedly connected to the top cover, a motor is fixedly connected to the top of the bracket, a driving wheel and a driving gear are coaxially fixedly connected to the output shaft of the motor, a driven wheel is fixedly sleeved on the outer side of the feeding tube, a transmission belt is sleeved between the driving wheel and the driven wheel, a driven gear is fixedly sleeved on the outer side of the upper cover, and the driving gear is meshed with the driven gear.

4. A centrifugal separation device according to claim 1, characterized in that: The separation mechanism also includes a fixing assembly, which includes two fixing frames, and the inner sides of the two fixing frames are rotatably connected with an upper connecting pipe and a lower connecting pipe respectively; the two fixing frames are fixedly connected to the inner wall of the separation cylinder, the upper connecting pipe and the lower connecting pipe are fixedly connected to the first screening cylinder and the second screening cylinder respectively, and the upper connecting pipe and the lower connecting pipe are communicated with the first screening cylinder and the second screening cylinder respectively, one of the fixing frames is distributed between the first screening cylinder and the second screening cylinder, and the other fixing frame is distributed at the bottom of the second screening cylinder.

5. A centrifugal separation device according to claim 4, characterized in that: The inner cleaning assembly comprises a plurality of connecting rods, each of which has an inner scraper fixedly connected to its outer end; the plurality of connecting rods are divided into two groups, the two groups of connecting rods are respectively fixedly connected to the feeding tube and the first fixed frame below the feeding tube, the two groups of inner scrapers are respectively distributed on the inner sides of the first screening cylinder and the second screening cylinder, and the two groups of inner scrapers are respectively in contact with the inner walls of the first screening cylinder and the second screening cylinder; The external cleaning assembly includes a feed cover and a plurality of support rods, and an outer scraper is fixedly connected to the outer end of each support rod; the feed cover is fixedly connected to the top of the second screening cylinder, and the outer diameter of the feed cover is adapted to the inner diameter of the separation cylinder, and the plurality of support rods are divided into two groups, and the two groups of support rods are respectively fixedly connected to the upper cover and the feed cover, and the two groups of outer scrapers are in contact with the inner wall of the separation cylinder.

6. A centrifugal separation device according to claim 5, characterized in that: The separation mechanism also includes a linkage component, which includes a plurality of through holes and a plurality of slots, the inner side of each of the through holes is slidably connected with a sliding rod, the top of the sliding rod is fixedly connected with an upper inclined cover, the inner side of each of the slots is plugged with a positioning pin, the top of the positioning pin is fixedly connected with a lower inclined cover, and a circular hole is opened on the lower inclined cover; each of the through holes is opened on the bottom wall of the first screening cylinder, and each of the through holes is distributed at an equal angle, the top end of each of the sliding rods is fixedly connected to the bottom surface of the upper inclined cover, the upper inclined cover is distributed at the bottom of the inner side of the first screening cylinder, each of the slots is opened on the bottom wall of the second screening cylinder, and the position of each slot corresponds to each through hole, the top end of each of the positioning pins is fixedly connected to the bottom surface of the lower inclined cover, the top end of the lower material pipe is fixedly connected to the bottom of the upper inclined cover through the upper connecting pipe, and the bottom end of the lower material pipe is fixedly connected to the top surface of the lower inclined cover, the discharge pipe is fixedly connected to the bottom surface of the lower inclined cover, and the discharge pipe is communicated with the discharge pipe through the circular hole.

7. A centrifugal separation device according to claim 6, characterized in that: The closure assembly includes a sleeve, which is threadedly assembled on the outside of the discharge pipe through an inner thread groove; the length of the sleeve is matched with the length of the discharge port on the discharge pipe, and the sleeve is located on the inner side of the lower connecting pipe.

8. A centrifugal separation device according to claim 7, characterized in that: The separation mechanism also includes a reset assembly, which includes a plurality of springs, each of which is fixedly connected to a baffle at the bottom; one end of each spring is fixedly connected to the bottom of the first screening cylinder, and the other end of each spring is fixedly connected to each baffle, each baffle is fixedly connected to the bottom end of each sliding rod, and each spring is distributed on the outside of each sliding rod.

9. A centrifugal separation device according to claim 1, characterized in that: The magnetic separation assembly includes a magnetic separation cylinder and a magnetic separation shaft, a plurality of stirring rods are fixedly connected to the outer side of the magnetic separation shaft, and a magnetic separation screen is fixedly connected to the inner side of the magnetic separation cylinder; the magnetic separation cylinder is fixedly connected to the top cover, the feed port on the feeding pipe is distributed on the inner side of the magnetic separation cylinder, the magnetic separation shaft is fixedly connected to the top surface of the feeding pipe, and the magnetic separation shaft and each stirring rod are distributed above the magnetic separation screen, and the feeding pipe is rotatably connected to the magnetic separation screen.

10. A centrifugal separation method for quartz sand selection, characterized in that: A centrifugal separation device as claimed in any one of claims 1 to 9 is used.

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