Ore screening device with multi-stage screening function

Abstract

The invention relates to the technical field of limestone processing, in particular to an ore screening device with a multi-stage screening function, which comprises a shell, and a first screening piece, a second screening piece and a third screening piece which are fixed in the shell, according to the ore screening device, a driving motor is started, and under the action of power transmitted by a universal shaft, a transmission column, a long shaft and the like, a movable long rod is driven to do reciprocating motion on the inner wall of a connecting cylinder, so that a convex block is in intermittent contact with a roller, and a plurality of groups of ejector rods extend to the outer side of a sleeve and are matched with an ejector head to eject ore materials clamped in holes of a screening piece; meanwhile, the multiple sets of ejector rods stretch out in sequence in an intermittent mode, part of the ejector rods do not stretch out, and therefore the time that the ejector rods are exposed to the outer side is further shortened, the ejector rods are completely located in the sleeve and the connecting cylinder in the non-working process, the number of times that the ejector rods are impacted is greatly reduced, the trunk portions of the ejector rods are protected, and the service life of the ejector rods is prolonged. The ejection component is not easy to bend, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of limestone processing, in particular to an ore screening device with a multi-stage screening function. Background Art

[0002] Limestone processing is a process involving multiple steps and processes, which aims to convert raw limestone ore into products of different particle sizes and finenesses to meet the needs of different industries. Screening is an important link in the limestone beneficiation process. Its main purpose is to classify the ore according to the requirements of particle size, quality, etc., so as to facilitate subsequent processing and utilization. At present, vibrating screens are mostly used for multi-stage screening of ore. Vibrating screens use screening components such as screen plates or screens with different aperture sizes to generate vibration to implement screening work. At the feed of the screening machine, nozzles for spraying water are usually set to reduce dust on the ore materials.

[0003] However, during the screening process, the screening piece may get stuck, which affects the screening efficiency. After searching, it is found that a Chinese patent document discloses a bar mesh screen coal screening machine with a material-shifting comb [Publication No.: CN106493065B]. This bar mesh screen coal screening machine with a material-shifting comb includes a frame, a hopper, a flat screen body installed at an angle relative to the ground, and a screen body driving device. The improvement is that the screen in the screen body is composed of screen bars arranged in parallel at a set spacing, and there is a screen hole anti-blocking comb composed of comb teeth and a tooth seat that fixes multiple comb teeth in a row under the screen. The comb teeth of the anti-blocking comb extend upward into the corresponding screen holes, and the screen body driving mechanism is installed on the frame. The positive effect of the present invention is that it has the function of forcibly removing the material that is instantly blocked in the screen hole, eliminating the possibility of screen blocking by inferior coal with high water content, high ash content and high viscosity, and no longer has the phenomenon of screen blocking that was previously normal, solving the technical problems that have long plagued domestic thermal power plants. At the same time, the screening of the same amount of low-quality coal can reduce the energy consumption by more than half compared with the existing screening machines.

[0004] The above-mentioned device utilizes the comb teeth of the reciprocating anti-blocking comb to clean the mesh of the screen, and the comb teeth play the role of ejecting stuck materials to prevent blockage. However, in actual use, the comb teeth of the anti-blocking comb are always exposed to the screening work area and are impacted by materials such as ore for a long time, and are easily bent, especially the body of the comb teeth are impacted, which is more likely to bend. In this way, after the comb teeth are bent, they cannot play the role of cleaning, and their service life is shortened; at the same time, the dust material on the surface of the limestone ore is separated after shaking, and is formed into wet material under the action of the dust reduction water sprayed, and the powder material is composed of limestone ore powder, clay, silicate and other impurities, which may increase the viscosity of the wet material, causing the wet material to easily adhere to the inner wall of the hole on the surface of the screening element, increasing the possibility of blockage, and the dust reduction water can clean the wet material attached to the local holes on the surface of the screening element, and the dust reduction water is blocked by the ore, which is easy to be not cleaned in place, and the holes on the surface of the screening element far away from the dust reduction area cannot be effectively cleaned. Summary of the invention

[0005] The object of the present invention is to provide an ore screening device with a multi-stage screening function, which can retract into the inside after ejecting the ore stuck in the holes on the surface of the screening component, so as to avoid the ejection component from contacting the ore for a long time, greatly reduce the number of times the ejection component is impacted, make the ejection component less likely to bend, and extend the service life.

[0006] To achieve the above object, the present invention provides the following technical solution: an ore screening device with a multi-stage screening function, comprising a housing and a first screening member, a second screening member and a third screening member fixed inside the housing, wherein the first screening member and the second screening member are both formed by metal plates with holes formed on the surface, and further comprising;

[0007] A first box body and a second box body are bolted to both sides of the shell surface, and a connecting tube is bolted to one side of the first box body opposite to the second box body;

[0008] A push rod slidably connected to the inside of the sleeve, a plug is welded on the top of the push rod, the inside of the push rod and the inside of the plug are both hollow, and a plurality of through holes are opened on the surface of the plug;

[0009] A driving mechanism for driving the push rod to move;

[0010] A long tube is arranged on one side of the shell, and one end of the long tube is connected to a first hose;

[0011] An intermittent opening and closing mechanism cooperating with the long tube to supply water to the through hole;

[0012] A spraying mechanism is used to spray and reduce dust on the ore entering the shell.

[0013] Preferably, the driving mechanism comprises a driving motor, a universal shaft and a fixed plate, the universal shaft and the output shaft of the driving motor are fixed to each other, the fixed plate is bolted to the surface of the second box body, the surface of the fixed plate is rotatably connected with a transmission column, and one end of the universal shaft away from the driving motor is fixed to the transmission column, the surface of the second box body is rotatably connected with a long shaft, and the long shaft passes through the second box body, the bottom of the interior of the second box body is bolted with a vertical support plate, the surface of the vertical support plate is rotatably connected with a driving rod, the surface of the driving rod is penetrated by a connecting groove, the interior of the second box body is also bolted with a transverse support plate, and the long shaft passes through the transverse support plate and is rotatably connected to the penetration point, one end of the transmission column is connected to the long shaft through a bevel gear transmission, the surface of the transverse plate is also rotatably connected to the rotating column, and the rotating column and the long shaft are connected through a gear transmission, and one end of the connecting column is welded with The top of the movable rod is bolted with a connecting rod and the bottom of the movable rod is fixed with a toothed connection, and the connecting rod has a toothed connection at the bottom.

[0014] Preferably, a bracket is further provided on one side of the housing, and the driving motor is bolted to the surface of the bracket.

[0015] Preferably, the driving rod is designed as a broken line, and the direction of the connecting groove is the same as the shape of the driving rod.

[0016] Preferably, the intermittent opening and closing mechanism includes a connecting pipe, a transverse pipe and a short pipe, the connecting pipe runs through the first box body, the connecting pipe is communicated with the long pipe, the transverse pipe is fixed inside the connecting tube and is communicated with the connecting pipe, one end of the short pipe is communicated with the transverse pipe, a box body is also bolted at the bottom of the connecting tube, a connecting groove is provided inside the box body, the other end of the transverse pipe is communicated with the communicating groove, and the other end of the communicating groove is also connected with a second hose, a connecting pipe is provided at the bottom of the transverse plate, and the bottom end of the top rod is communicated with the connecting pipe, and one end of the second hose away from the box body is communicated with the connecting pipe, a sealing plate is slidably connected to the inner wall of the box body, connecting plates are bolted on both sides of the sealing plate, a second spring is fixed to the bottom of the connecting plate, and the bottom end of the second spring is fixed to the inner wall of the connecting tube.

[0017] Preferably, a protrusion is fixed above the surface of the blocking plate, and a limit plate is bolted to the top of the box body.

[0018] Preferably, the top of the blocking plate is also provided with a groove for use with a connecting pipe.

[0019] Preferably, the spraying mechanism includes a transverse pipe, a water pipe and a nozzle. The transverse pipe is arranged to penetrate the interior of the shell. The number of the nozzles is several and they are connected and arranged at the bottom of the transverse pipe. One end of the water pipe is connected to the transverse pipe, and the other end of the water pipe is connected to the long pipe.

[0020] Preferably, the distance between adjacent connecting tubes is greater than the aperture of the surface of the first screening element.

[0021] Preferably, the interior of the connecting tube is communicated with the interiors of the first box body and the second box body respectively, and the top of the connecting tube is designed to be arc-shaped.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention starts the driving motor and drives the movable long rod to reciprocate on the inner wall of the connecting tube under the action of power transmitted by the universal shaft, the transmission column, the long shaft, etc., so that the protrusion intermittently contacts the roller, and multiple groups of ejector rods are extended to the outside of the sleeve to cooperate with the ejector head to eject the ore material stuck in the hole of the screening element. At the same time, multiple groups of ejector rods are intermittently extended in sequence, and some ejector rods are not extended, thereby further reducing the time that the ejector rod, an ejection component, is exposed to the outside. Moreover, when not working, the ejector rod is completely located inside the sleeve and the connecting tube, which greatly reduces the number of times the ejector rod is impacted, protects the trunk of the ejector rod, makes the ejection component not easy to bend, and extends the service life.

[0024] 2. In the present invention, when the push rod rises, the sealing plate is no longer restricted, so that a passage is formed inside the connecting groove. Used water can pass through the second hose, the push rod, and the top head and be discharged from the through hole. The top head is located in the hole on the surface of the screening element, so that the cleaning water can directly act on the inner wall of the hole, which makes the cleaning more thorough and the effect better. Moreover, the water is discharged from the through hole only when the push rod rises, thereby realizing the precise use of water resources and reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of another side viewing angle in the present invention;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the shell in the present invention;

[0028] Figure 4 It is a schematic structural diagram of the first screening element and its surroundings in the present invention;

[0029] Figure 5 It is a side view of the connecting tube in the present invention;

[0030] Figure 6 It is a schematic diagram of the peripheral structure of the connecting tube and the second box in the present invention;

[0031] Figure 7 It is a partial structural schematic diagram of the driving mechanism in the present invention;

[0032] Figure 8 is a cross-sectional view of the second box body in the present invention;

[0033] Fig. 9 It is a diagram showing the partial structure inside the second box body of the present invention;

[0034] Fig.10 is a cross-sectional view of the connecting tube in the present invention;

[0035] Fig.11 For the present invention Fig.10 A schematic diagram of the enlarged structure at A in the middle;

[0036] Fig.12 It is a partial structural schematic diagram of the driving mechanism and the intermittent opening and closing mechanism in the present invention;

[0037] Fig.13 It is a structural schematic diagram of the intermittent opening and closing mechanism of the present invention;

[0038] Fig.14 is a top cross-sectional view of the box body in the present invention;

[0039] Fig.15 It is a cross-sectional view of the ejector rod and the ejector head in the present invention.

[0040] In the figure: 1, housing; 2, first screening element; 3, second screening element; 4, third screening element; 5, first box; 6, second box; 7, bracket; 8, connecting tube; 9, sleeve; 10, ejector rod; 11, ejector head; 12, through hole; 13, driving mechanism; 131, driving motor; 132, universal shaft; 133, fixing plate; 134, transmission column; 135, long shaft; 136, vertical support plate; 137, driving rod; 138, connecting groove; 139, crank; 1310, rotating column; 1311, short handle; 1312, connecting column; 1313, horizontal support plate; 1314, connecting block; 1315, movable long rod; 1316 , protrusion; 1317, connecting frame; 1318, roller; 1319, first spring; 1320, transverse plate; 1321, slide rail; 14, long tube; 15, first hose; 16, intermittent opening and closing mechanism; 161, connecting pipeline; 162, transverse tube; 163, short tube; 164, box body; 165, second hose; 166, connecting pipe; 167, blocking plate; 168, connecting plate; 169, second spring; 1610, connecting groove; 1611, groove; 1612, limit plate; 1613, raised part; 17, spraying mechanism; 171, transverse tube; 172, water pipe; 173, nozzle; 18, detection probe. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-Figure 15, an ore screening device with a multi-stage screening function, comprising a housing 1 and a first screening piece 2, a second screening piece 3 and a third screening piece 4 fixed inside the housing 1, the aperture of the surface of the first screening piece 2 is larger than the aperture of the surface of the second screening piece 3, so that the first screening piece 2 can screen large limestone ores, the aperture of the surface of the second screening piece 3 is larger than the aperture of the surface of the third screening piece 4, so that the second screening piece 3 can screen slightly larger limestone ores, the first screening piece 2 and the second screening piece 3 are both composed of metal plates with holes on the surface, but the holes on the surfaces of the two are different in size The third screening piece 4 has the smallest aperture on its surface and is a screen. The third screening piece 4 can screen limestone ore with the smallest particle size and other impurities, and the mesh on the surface of the third screening piece 4 is not easy to get stuck with ore. The screening device is driven by a motor to drive the eccentric wheel arranged on the shell 1 to rotate, and the centrifugal force generated by the eccentric wheel during the rotation is used in conjunction with the spring below to make the shell 1, the first screening piece 2, the second screening piece 3 and the third screening piece 4 vibrate to achieve vibration screening, and it is a multi-stage screening. These are all existing technologies, and the detailed structure and working method will not be repeated. The device also includes a driving mechanism 13, an intermittent opening and closing mechanism 16 and a spraying mechanism 17. The first box body 5 and the second box body 6 are bolted to both sides of the surface of the shell 1, and a connecting cylinder 8 is bolted to the side opposite to the first box body 5 and the second box body 6. The interior of the connecting cylinder 8 is communicated with the interior of the first box body 5 and the second box body 6 respectively. The top of the connecting cylinder 8 is designed in an arc shape, so as to prevent the ore from passing through the first screening element 2 and the second screening element 3 and staying or getting stuck on the surface of the connecting cylinder 8. The distance between adjacent connecting cylinders 8 is greater than the aperture of the surface of the first screening element 2, so that the ore under screening The ore coming in will not be stuck because the distance between the connecting tubes 8 is too small. A sleeve 9 is also arranged on the top of the connecting tube 8. A push rod 10 is slidably connected inside the sleeve 9. A plug 11 is welded on the top of the push rod 10. Both the plug 11 and the push rod 10 are made of wear-resistant steel. The inside of the push rod 10 and the inside of the plug 11 are hollow. The wall thickness of the plug 11 is thicker, so it is not easily damaged. A number of through holes 12 are arranged on the surface of the plug 11. A long tube 14 is arranged on one side of the shell 1, and one end of the long tube 14 is connected to a first hose 15.

[0043] The driving mechanism 13 includes a driving motor 131, a universal shaft 132 and a fixing plate 133. A bracket 7 is also provided on one side of the shell 1, and the driving motor 131 is bolted to the surface of the bracket 7. The bracket 7 supports and fixes the driving motor 131. There are multiple driving motors 131. The driving mechanism 13 corresponding to each of three or two groups of connecting tubes 8 is driven by a driving motor 131. The universal shaft 132 and the output shaft of the driving motor 131 are fixed to each other. The fixing plate 133 is bolted to the surface of the second box body 6. The surface of the fixing plate 133 is rotatably connected with a transmission column 134, and the end of the universal shaft 132 away from the driving motor 131 is fixed to the transmission column 134. Due to the vibration of the shell 1, the universal shaft 132 The transmission of power between the driving motor 131 and the transmission column 134 is ensured. The surface of the second box body 6 is rotatably connected with a long shaft 135. One group of long shafts 135 passes through two second boxes 6, and the other group of long shafts 135 passes through three second boxes 6. A vertical support plate 136 is bolted to the bottom of the second box body 6. The surface of the vertical support plate 136 is rotatably connected with a driving rod 137. The driving rod 137 is designed as a broken line. A connecting groove 138 is opened on the surface of the driving rod 137, and the direction of the connecting groove 138 is the same as the shape of the driving rod 137. A transverse support plate 1313 is also bolted to the inside of the second box body 6, and the long shaft 135 passes through the transverse support plate 1313 and is rotatably connected to the penetration point. One end of the transmission column 134 is connected to the long shaft 135 through a bevel gear transmission connection. The surface of the transverse plate 1320 is also rotatably connected with a rotating column 1310, and the rotating column 1310 is connected to the long shaft 135 through a gear transmission, which enables the long shaft 135 to drive the connecting column 1312 to rotate during the rotation. A crank 139 is welded at one end of the connecting column 1312, and the extended end of the crank 139 is slidably connected to the inner wall of the connecting groove 138. The driving mechanism 13 also includes a movable long rod 1315. The number of movable long rods 1315 is two groups and they are respectively located on both sides of the inside of the connecting cylinder 8. Both sides of the inside of the connecting cylinder 8 are bolted with slide rails 1321. The cross-section of the slide rail 1321 is T-shaped, and the movable long rod 1315 is slidably connected to the surface of the slide rail 1321, which enables the slide rail 1321 to move back and forth. A transverse plate 1320 is provided below the surface of 10, and the transverse plate 1320 fixes the top rods 10 together in groups of three. A connecting frame 1317 is bolted to the top of the transverse plate 1320, and the connecting frame 1317 is rotatably connected to a roller 1318. A protrusion 1316 used in conjunction with the roller 1318 is bolted to the top of the movable long rod 1315. A first spring 1319 is also fixed to the top of the transverse plate 1320, and the top of the first spring 1319 is fixed to the bottom of the sleeve 9. Under the action of the first spring 1319, the transverse plate 1320 and the top rod 10 are subjected to a downward reaction force. A connecting block 1314 is bolted between adjacent movable long rods 1315, and a connecting column 1312 is bolted to the top of the connecting block 1314.The surface of the connecting column 1312 is rotatably connected to a short handle 1311, and the other end of the short handle 1311 is rotatably connected to the driving rod 137.

[0044] The spraying mechanism 17 includes a transverse pipe 171, a water pipe 172 and a nozzle 173. The transverse pipe 171 is arranged inside the housing 1. The number of nozzles 173 is several and they are connected and arranged at the bottom of the transverse pipe 171. One end of the water pipe 172 is connected to the transverse pipe 171, and the other end of the water pipe 172 is connected to the long pipe 14. When working, the first hose 15 is connected to the external water supply pipeline and water supply facilities to supply water to the first hose 15, and then the long pipe 14, the transverse pipe 171, the water pipe 172 and the nozzle 173 are connected to the water supply pipe 172. The ore entering the shell 1 is sprayed to reduce dust. At the same time, under the action of the first screening element 2, the second screening element 3 and the third screening element 4, multi-stage screening of the ore is achieved. When the screening operation is in progress, the body parts of the top rod 10 are located inside the sleeve 9 and the connecting tube 8, so as to protect the top rod 10 which plays a cleaning role and prevent the top rod 10 from being exposed in the screening working area, contacting with the ore for a long time, and being easily damaged; when the body parts of the top rod 10 are located inside the sleeve 9 and the connecting tube 8, the roller 1318 is in contact with the movable long rod 1315.

[0045] When the screening work is carried out, the driving motor 131 is turned on at regular intervals (for example, 3 hours), which can drive the universal shaft 132 to rotate, and then the universal shaft 132 drives the transmission column 134 to rotate, and then the transmission column 134 drives the long shaft 135 to rotate through the bevel gear, and then the long shaft 135 drives the rotating column 1310 to rotate through the gear, and the rotating column 1310 drives the short handle 1311 to rotate, so that the extended end of the short handle 1311 makes a circular motion, which makes the extended end of the short handle 1311 move along the inside of the connecting groove 138 to drive the driving rod 137 to swing back and forth, and the driving rod 137 repeatedly pulls or pushes the connecting column 1312 through the short handle 1311, and under the action of the connecting column 1312 and the connecting block 1314, drives the movable long rod 1 315 moves back and forth in the horizontal direction, and the movable long rod 1315 drives the surface protrusion 1316 to move back and forth. When the roller 1318 moves along the surface of the movable long rod 1315 and contacts the surface slope of the protrusion 1316, the roller 1318 is gradually lifted, thereby driving the connecting frame 1317, the transverse plate 1320 and the push rod 10 to rise together. The first spring 1319 is a compression spring. At this time, the first spring 1319 is in a compressed state. The push rod 10 drives the head 11 to rise, and the head 11 and the push rod 10 enter the hole inside the first screening piece 2 or the second screening piece 3 to push out the stuck ore. At the same time, when the roller 1318 goes downhill along the surface of the protrusion 1316, the first spring 1319 exerts a downward force to make the top The rod 10 and the transverse plate 1320 are lowered, and then the top 11 covers the surface of the sleeve 9 again, and the function of the protrusion 1316 makes each group of push rods 10 extend at intervals, and all the push rods 10 are not extended together, which reduces the time that the trunk of the push rod 10 is exposed to the outside of the sleeve 9 and the connecting tube 8, and reduces wear. A detection probe 18 is also provided inside the connecting tube 8. The detection probe 18 is a camera, which is aimed at the position of the top of the protrusion 1316. The detection probe 18 is connected to an external control system. The distance between adjacent rollers 1318 is greater than the width of the protrusion 1316. After the cleaning work is carried out, it lasts for 20 to 40 seconds. Each push rod 10 extends to the outside of the sleeve 9 at least once to clean the first screening element 2 and the first screening element 2. The stone stuck inside the hole on the surface of the second screening member 3 is aligned with the center of the detection probe 18 at the top of the projection 1316, and the driving motor 131 is turned off. At this time, the projection 1316 does not contact any roller 1318, so that all the push rods 10 are retracted into the interior of the sleeve 9 and the connecting tube 8. The sleeve 9, the connecting tube 8 and the top head 11 are designed with thick walls, which are not easily damaged by being hit by ore for a long time. The main part of cleaning the stuck ore, that is, the push rod 10, the trunk part of the push rod 10 is completely located in the sleeve 9 and the push rod 10, and is only exposed to the contact with the ore in the working area for a short time during cleaning. The impact force generated by the falling ore will not directly act on the surface of the push rod 10, so that the push rod 10 is not easily bent.Prolong the service life of the ejector rod 10.

[0046] The intermittent opening and closing mechanism 16 includes a connecting pipe 161, a transverse pipe 162 and a short pipe 163. The connecting pipe 161 runs through the first box body 5. The connecting pipe 161 is connected to the long pipe 14. The transverse pipe 162 is fixed inside the connecting tube 8 and is connected to the connecting pipe 161. One end of the short pipe 163 is connected to the transverse pipe 162. A box body 164 is bolted to the lower part of the connecting tube 8. A connecting groove 1610 is provided inside the box body 164. The other end of the transverse pipe 162 is connected to the connecting groove 1610. The other end of the connecting groove 1610 is also connected to a second hose 165. A connecting pipe 166 is provided at the bottom of the transverse plate 1320, and the bottom end of the push rod 10 is connected to the connecting pipe 166. The end of the second hose 165 away from the box body 164 is connected to the connecting pipe 166. The connecting groove 1610, the second hose 165, and the connecting pipe 166 are connected to each other. The inner wall of the box body 164 is slidably connected with a blocking plate 167. Both sides of the blocking plate 167 are bolted with connecting plates 168. A second spring 169 is fixed to the bottom of the connecting plate 168. The second spring 169 is a compression spring. The bottom end of the second spring 169 is fixed to the inner wall of the connecting tube 8. The second spring 169 gives an upward force to the connecting plate 168 and the blocking plate 167 to keep the connecting groove 1610 in an open state. A protrusion 1613 is also fixed above the surface of the blocking plate 167. The top of the box body 164 is bolted with a limiting plate 1612. The protrusion 1613 contacts the limiting plate 1612 when the blocking plate 167 rises to prevent the second spring 169 from causing the blocking plate 167 to pop out of the box body 164. A groove 1611 is also provided on the top of the blocking plate 167.

[0047] The water of the long tube 14 can enter the connecting pipe 161, the transverse pipe 162 and the short pipe 163. Most of the time, since the top rod 10 is located inside the sleeve 9 and the connecting tube 8, the transverse plate 1320 and the connecting pipe 166 are also in a low position. At the same time, the bottom of the connecting pipe 166 contacts the inner wall of the groove 1611, and the blocking plate 167 blocks the connecting groove 1610 to form a circuit break. At this time, the second spring 169 is compressed. When the top rod 10 rises to work, the connecting pipe 166 is separated from the inner wall of the groove 1611, and the blocking plate 167 lacks restriction. Then, under the action of the second spring 169, the connecting plate 168 and the blocking plate 167 are driven to rise, so that the interior of the connecting groove 1610 is in a state of passage, and water passes through the connecting groove 16 10. The second hose 165, the push rod 10, and the push head 11 are sprayed out from the through hole 12, and the push head 11 enters the surface holes of the first screening element 2 or the second screening element 3 to achieve spray cleaning, and clean up the wet materials adhering to the holes, so that the cleaning effect is better. Moreover, only when the push rod 10 is working, the through hole 12 is discharged to directly clean the surface holes of the first screening element 2 or the second screening element 3, so as to achieve the precise use of water resources and reduce waste (if a large-scale spraying of dust reduction water is used to clean the wet materials inside the holes, continuous spraying is required, and the water consumption will be large). During the descending process of the push rod 10, the connecting pipe 166 contacts the groove 1611, so that the sealing plate 167 descends, realizes the disconnection inside the connecting groove 1610, and stops spraying water at the through hole 12.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] 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. An ore screening device with a multi-stage screening function, comprising a housing (1) and a first screening member (2), a second screening member (3) and a third screening member (4) fixed inside the housing (1), wherein the first screening member (2) and the second screening member (3) are both formed by metal plates with holes formed on the surface, characterized in that: Also includes; A first box body (5) and a second box body (6) are bolted to both sides of the surface of the shell (1), and a connecting tube (8) is bolted to the side of the first box body (5) opposite to the second box body (6); A push rod (10) is slidably connected to the inside of the sleeve (9), a plug (11) is welded to the top of the push rod (10), the inside of the push rod (10) and the inside of the plug (11) are both hollow, and a plurality of through holes (12) are formed through the surface of the plug (11); A driving mechanism (13) for driving the push rod (10) to move; A long tube (14) is arranged on one side of the housing (1), one end of the long tube (14) being connected to a first hose (15); an intermittent opening and closing mechanism (16) cooperating with the long tube (14) to supply water to the through hole (12); A spraying mechanism (17) is provided for spraying and reducing dust on the ore entering the interior of the shell (1).

2. The ore screening device with multi-stage screening function according to claim 1 is characterized in that: The driving mechanism (13) comprises a driving motor (131), a universal shaft (132) and a fixing plate (133); the universal shaft (132) and the output shaft of the driving motor (131) are fixed to each other; the fixing plate (133) is bolted to the surface of the second housing (6); the surface of the fixing plate (133) is rotatably connected to a transmission column (134); one end of the universal shaft (132) away from the driving motor (131) is fixed to the transmission column (134); the surface of the second housing (6) is rotatably connected to a long shaft (135), and the long shaft (135) passes through the second housing (6); the bottom of the second housing (6) is bolted to a vertical support plate (136) The surface of the vertical support plate (136) is rotatably connected to a driving rod (137), and a connecting groove (138) is formed through the surface of the driving rod (137). A horizontal support plate (1313) is also bolted to the interior of the second housing (6), and the long shaft (135) passes through the horizontal support plate (1313) and is rotatably connected to the penetration point thereof. One end of the transmission column (134) is connected to the long shaft (135) through a bevel gear transmission. The surface of the horizontal plate (1320) is also rotatably connected to a rotating column (1310), and the rotating column (1310) is connected to the long shaft (135) through a gear transmission. A crank (139) is welded to one end of the connecting column (1312), and the crank The extending end of (139) is slidably connected to the inner wall of the connecting groove (138), the driving mechanism (13) also includes a movable long rod (1315), the number of the movable long rod (1315) is two groups and they are respectively located on both sides of the interior of the connecting tube (8), both sides of the interior of the connecting tube (8) are bolted with a slide rail (1321), and the movable long rod (1315) is slidably connected to the surface of the slide rail (1321), a transverse plate (1320) is provided below the surface of the top rod (10), the top of the transverse plate (1320) is bolted with a connecting frame (1317), the rotation of the connecting frame (1317) is connected with a roller (1318), the movable long rod (1315) The top of the movable long rod (1315) is bolted with a protrusion (1316) used in conjunction with a roller (1318), the top of the transverse plate (1320) is also fixed with a first spring (1319), and the top of the first spring (1319) and the bottom of the sleeve (9) are fixed to each other, and a connecting block (1314) is bolted between adjacent movable long rods (1315), and the top of the connecting block (1314) is bolted with a connecting column (1312), the surface of the connecting column (1312) is rotatably connected with a short handle (1311), and the other end of the short handle (1311) is rotatably connected to a driving rod (137), and a detection probe (18) is also arranged inside the connecting tube (8).

3. The ore screening device with multi-stage screening function according to claim 2 is characterized in that: A bracket (7) is also provided on one side of the housing (1), and the drive motor (131) is bolted to the surface of the bracket (7).

4. The ore screening device with multi-stage screening function according to claim 2 is characterized in that: The driving rod (137) is designed as a broken line, and the direction of the connecting groove (138) is the same as the shape of the driving rod (137).

5. The ore screening device with multi-stage screening function according to claim 2 is characterized in that: The intermittent opening and closing mechanism (16) comprises a connecting pipe (161), a transverse pipe (162) and a short pipe (163); the connecting pipe (161) passes through the first box body (5); the connecting pipe (161) is in communication with the long pipe (14); the transverse pipe (162) is fixed inside the connecting tube (8) and is in communication with the connecting pipe (161); one end of the short pipe (163) is in communication with the transverse pipe (162); a box body (164) is bolted to the lower part of the connecting tube (8); a connecting groove (1610) is provided inside the box body (164); the other end of the transverse pipe (162) is in communication with the connecting groove (1610); The two connecting members (1610) are connected to each other, the other end of the connecting groove (1610) is also connected to a second hose (165), a connecting pipe (166) is provided at the bottom of the transverse plate (1320), and the bottom end of the push rod (10) is connected to the connecting pipe (166), the end of the second hose (165) away from the box body (164) is connected to the connecting pipe (166), the inner wall of the box body (164) is slidably connected to a blocking plate (167), both sides of the blocking plate (167) are bolted to connecting plates (168), a second spring (169) is fixed to the bottom of the connecting plate (168), and the bottom end of the second spring (169) is fixed to the inner wall of the connecting tube (8).

6. The ore screening device with multi-stage screening function according to claim 5, characterized in that: A protrusion (1613) is also fixed above the surface of the blocking plate (167), and a limiting plate (1612) is bolted to the top of the box body (164).

7. The ore screening device with multi-stage screening function according to claim 5, characterized in that: The top of the blocking plate (167) is also provided with a groove (1611) for use with the connecting pipe (166).

8. The ore screening device with multi-stage screening function according to claim 1 is characterized in that: The spraying mechanism (17) comprises a transverse pipe (171), a water pipe (172) and a nozzle (173); the transverse pipe (171) is arranged to penetrate the interior of the housing (1); the nozzles (173) are arranged in a plurality and are connected to the bottom of the transverse pipe (171); one end of the water pipe (172) is connected to the transverse pipe (171), and the other end of the water pipe (172) is connected to the long pipe (14).

9. The ore screening device with multi-stage screening function according to claim 1, characterized in that: The distance between adjacent connecting tubes (8) is greater than the aperture of the surface of the first screening element (2).

10. The ore screening device with multi-stage screening function according to claim 1, characterized in that: The interior of the connecting tube (8) is communicated with the interior of the first box body (5) and the interior of the second box body (6) respectively, and the top of the connecting tube (8) is designed to be arc-shaped.

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