A raw material screening device for mining engineering

Abstract

This invention discloses a raw material screening device for mining engineering, comprising a screening box, inside which are a first screening plate and a second screening plate. Both the first and second screening plates have a plurality of sieve holes, with the diameter of the sieve holes on the first screening plate being larger than that on the second screening plate. A cavity between the first and second screening plates is designated as a target particle size cavity. The top of the second screening plate has a plurality of baffles, the height of which decreases sequentially from left to right. A collecting body is located on one side of the screening box, and the collecting body is connected to the screening box. A first pump assembly is located on the side of the screening box away from the collecting body, and the first pump assembly is connected to the target particle size cavity. This invention has a simple structure and, through multiple screenings, can achieve relatively accurate screening of the target particle size of the desired raw material, thus ensuring that the screened raw material particles are approximately the same size.

Description

Technical Field

[0001] This invention relates to the field of raw material screening technology, specifically a raw material screening device for mining engineering. Background Technology

[0002] Mining is an important raw material industry. Metallic ores are the main raw materials for the smelting industry, while non-metallic ores are important raw materials for chemicals and construction. Mineral raw materials are obtained by excavating or drilling underground with a mining head. The size and weight of the minerals mined from underground vary, requiring crushing. However, some mineral raw materials have already reached the standard for crushing and do not need further crushing. Currently, existing screening devices lack a quick way to deal with potential blockages in the feed hopper. Once a blockage occurs, feeding must be stopped, and the blocked material must be removed before operation can continue, reducing work efficiency.

[0003] To address the aforementioned problems, Chinese Patent Publication No. CN216323167U discloses a raw material screening device for mining engineering, comprising a frame, a box mounted on top of the frame, a feed hopper at the top of the box, a vibrator mounted at the bottom of the box, a fixing plate mounted above the vibrator, a filter screen installed inside the box, a sliding groove on the top of the box, a slider installed inside the sliding groove, a first push rod connected to one side of the slider, and a second push rod installed inside the first push rod. This utility model incorporates a first push rod, a second push rod, a pull rod, a sliding groove, and a slider. When the feed hopper becomes clogged, pulling the pull rod causes it to rotate the second push rod and the first push rod upwards, thereby pushing the clogged raw material away from below. The slider and the sliding groove allow the push rod to slide, enabling it to lift the raw material at any position within the feed hopper.

[0004] However, the aforementioned patent uses only a single filter to screen the raw materials, which results in inconsistent particle size among the screened materials. Summary of the Invention

[0005] To address the problem of inconsistent particle size among the screened materials, the present invention aims to provide a raw material screening device for mining engineering that achieves uniform particle size through multi-stage screening.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A raw material screening device for mining engineering includes a screening box, a feeding hopper communicating with the inside of the screening box at the top, a first screening plate and a second screening plate arranged sequentially from top to bottom inside the screening box, each of the first screening plate and the second screening plate being provided with a plurality of sieve holes, the diameter of the sieve holes on the first screening plate being larger than the diameter of the sieve holes on the second screening plate; and the cavity between the first screening plate and the second screening plate being set as a target particle size cavity.

[0007] The top of the second screening plate is provided with several baffles. The baffles are attached to the inner side wall of the screening box on both sides along their length direction, and the height of the baffles decreases from left to right.

[0008] A collector is provided on one side of the screening box. The collector is located at the target particle size cavity and is close to the highest side of the baffle. The collector has an inlet on the side of the screening box near the collector, and the screening box has an outlet on the side of the screening box near the collector that corresponds to the inlet. The collector and the screening box are connected through the inlet and outlet.

[0009] A first pump assembly is provided on the side of the screening box away from the collector, and the first pump assembly is connected to the target particle size chamber through a connecting pipe.

[0010] The basic principle of the scheme is as follows: First, the raw material is fed into the screening box from the feeding hopper. Then, the raw material larger than the target particle size will stay on the first screening plate, and the raw material smaller than or equal to the target particle size will fall into the target particle size cavity. Under the action of the second screening plate, the raw material smaller than the target particle size will fall from the screen holes of the second screening plate to the bottom of the screening box. This can achieve preliminary and accurate screening of the raw material.

[0011] While performing preliminary and precise material selection, the raw materials are also deeply screened. The first pump assembly is turned on, and then the first pump assembly will deliver a certain amount of air pressure into the target particle size chamber. Raw materials smaller than the target particle size are more easily blown to the side closer to the collection body under the influence of air pressure. Furthermore, through the design of the baffle, the target particle size can be blocked, thereby allowing the smaller particle size raw materials to drift into the collection body, thus achieving deep screening of the raw materials.

[0012] The beneficial effects of the basic solution are as follows: Compared with the existing technology, this solution, on the one hand, allows the raw material to remain in the target particle size cavity through preliminary screening, and then, driven by air pressure, the raw material can be simultaneously screened for depth screening at the same time as the preliminary screening. Then, the raw material smaller than the target particle size remaining in the target particle size cavity can be screened into the collection body. Through multiple screenings, the target particle size of the required raw material can be screened more accurately, so that the screened raw material particle size is approximately the same.

[0013] Furthermore, a functional box is provided at the bottom of the screening box, and a second pump assembly is provided inside the functional box. The second pump assembly is connected to several jet nozzles through connecting pipes. All jet nozzles are fixedly connected to the bottom wall of the screening box and are connected to the inside of the screening box.

[0014] The beneficial effect of the basic scheme is that, driven by the second pump assembly, several nozzles will spray air into the screening box, and the raw material at the top of the second screening plate will rise under the influence of wind pressure. As a result, the second pump assembly will increase the volume of raw material floating, thereby increasing the total amount of raw material being screened.

[0015] The vertical wind pressure of the second pump assembly can reduce the possibility of screen hole blockage on the second screening plate. Furthermore, the intermittent opening and closing frequency of the second pump assembly can reduce the amount of raw material that always floats at the bottom of the screening box, thus affecting the screening effect.

[0016] Furthermore, the collector is connected to a third pump assembly via a connecting pipe, and the output end of the third pump assembly is connected to the target particle size chamber inside the screening box via a connecting pipe.

[0017] The beneficial effect of the basic scheme is that the raw material in the collection body is transported back to the target particle size chamber through the third pump assembly, thereby screening the raw material again. After the screening is completed, the third pump assembly can be turned off, so that the particle size of the screened raw material is as close as possible to the required particle size.

[0018] Furthermore, the screening box is also equipped with a material inlet, which is fitted with a sealing plate that can be detachably connected to the screening box.

[0019] The beneficial effect of the basic scheme is that when the screened raw materials are taken out, the sealing plate can be removed directly, and then the raw materials in the target particle size cavity can be taken out.

[0020] Furthermore, the inner wall of the screening box away from the material inlet is provided with a cavity, and a placement box is fixedly connected to the outer wall of the screening box near the cavity. A motor is fixedly connected inside the placement box, and an incomplete gear is coaxially fixedly connected to the output shaft of the motor. The incomplete gear is located inside the cavity.

[0021] The cavity is also equipped with an elliptical frame, and the incomplete gear is located inside the elliptical frame. The top and bottom walls of the elliptical frame are equipped with several teeth that can mesh with the incomplete gear. Telescopic rods are fixedly connected to both sides of the elliptical frame, and the side of the telescopic rod away from the elliptical frame is fixedly connected to the side wall of the screening box.

[0022] The first and second screening plates both pass through the side wall of the screening box and extend into the cavity on the side closest to the cavity. The first and second screening plates are fixedly connected to the top and bottom walls of the elliptical frame, respectively. The first and second screening plates slide laterally with the screening box on both sides along their width direction.

[0023] The beneficial effects of the basic scheme are: driven by the motor, the incomplete gear will rotate, causing the elliptical frame to move laterally in a reciprocating motion. The first and second screening plates will also move laterally in a reciprocating motion. As a result, when the raw material falls onto the first and second screening plates, the possibility of the raw material clogging the screen holes can be reduced due to the lateral reciprocating motion of the first and second screening plates.

[0024] Furthermore, telescopic plates are fixedly connected to both sides of the first and second screening plates along their length direction. The side of the telescopic plates away from the first and second screening plates is fixedly connected to the inner wall of the screening box. The first and second screening plates slide laterally with the screening box through the telescopic plates.

[0025] The beneficial effect of the basic scheme is that the telescopic plate can provide certain support for the first and second screening plates without affecting their reciprocating motion.

[0026] Furthermore, handles are fixedly connected to the enclosed panel.

[0027] The advantage of the basic solution is that it allows operators to easily remove the sealing plate, thus facilitating material handling.

[0028] Furthermore, the handles are textured for better grip.

[0029] The beneficial effect of the basic solution is that it reduces the possibility of slipping. Attached Figure Description

[0030] Figure 1 This is a front sectional view of a raw material screening device for mining engineering in an embodiment of the present invention.

[0031] Figure 2 This is a frontal schematic diagram of the elliptical frame of the raw material screening device for mining engineering in an embodiment of the present invention.

[0032] Figure 3 This is a side sectional view of a raw material screening device for mining engineering in an embodiment of the present invention. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation methods:

[0034] The reference numerals in the accompanying drawings include: screening box 1, feeding hopper 2, first screening plate 3, telescopic plate 4, collecting body 5, discharge port 6, third pump assembly 7, jet nozzle 8, second pump assembly 9, function box 10, second screening plate 11, sieve hole 12, baffle 13, first pump assembly 14, target particle size cavity 15, telescopic rod 16, elliptical frame 17, tooth 18, incomplete gear 19, cavity 20, placement box 21, motor 22, sealing plate 23, handle 24.

[0035] Example 1

[0036] The basics are as follows: Figure 1-3 As shown: A raw material screening device for mining engineering includes a screening box 1. A feeding hopper 2, which communicates with the interior of the screening box 1, is welded to the top of the screening box 1. A first screening plate 3 and a second screening plate 11 are arranged sequentially from top to bottom inside the screening box 1. Both the first screening plate 3 and the second screening plate 11 have a plurality of sieve holes 12. The diameter of the sieve holes 12 on the second screening plate 11 is the same as the particle size of the required raw material. The diameter of the sieve holes 12 on the first screening plate 3 is 1 cm larger than the diameter of the sieve holes 12 on the second screening plate 11. The cavity between the first screening plate 3 and the second screening plate 11 is set as a target particle size cavity 15.

[0037] The top of the second screening plate 11 is welded with several baffles 13. The baffles 13 are attached to the inner sidewall of the screening box 1 on both sides along their length direction. The height of the baffles 13 decreases from left to right.

[0038] A collection body 5 is welded to one side of the screening box 1. The collection body 5 is located at the target particle size cavity 15 and is close to the highest side of the baffle 13. The collection body 5 has an inlet on the side of the screening box 1 close to the collection body 1, and the screening box 1 has an outlet 6 corresponding to the inlet on the side of the collection body 5 close to the collection body 5. The collection body 5 and the screening box 1 are connected through the inlet and outlet 6.

[0039] A first pump assembly 14 is provided on the side of the screening box 1 away from the collector 5. The first pump assembly 14 is connected to the target particle size chamber 15 through a connecting pipe. Specifically, the first pump assembly 14 is preferably an air pump.

[0040] The specific implementation process is as follows: When screening raw materials, if the target particle size is 100cm, the raw materials are first fed into the screening box 1 from the feeding hopper 2. The raw materials will first fall onto the first screening plate 3. Since the diameter of the sieve hole 12 on the first screening plate 3 is larger than the diameter of the sieve hole 12 on the second screening plate 11, the raw materials with a particle size of 101cm or larger will remain on the first screening plate 3. The raw materials with a particle size of 100cm or smaller will fall into the target particle size cavity 15. Since the diameter of the sieve hole 12 on the second screening plate 11 is the same as the particle size of the required raw materials, the raw materials smaller than 100cm will fall from the second screening plate 11 to the bottom of the screening box 1. This can achieve preliminary and accurate screening of the raw materials.

[0041] While performing preliminary and precise material selection, the raw materials are also screened in depth. Specifically, the first pump assembly 14 is turned on, and the first pump assembly 14 will deliver a certain amount of air pressure into the target particle size chamber 15. Then, the raw materials with a particle size of less than 100cm will be blown closer to the collecting body 5 under the influence of air pressure because of their small particle size and small volume. Thus, the raw materials with a particle size of less than 100cm will flow into the collecting body 5 through the discharge port 6 and the inlet port.

[0042] When the raw material in the target particle size cavity 15 is floating under the influence of wind pressure, some 100cm raw material may also float up. Therefore, the design of the baffle 13 can extend the flow time of 100cm in the target particle size cavity 15, thereby reducing the possibility of 100cm being blown out by mistake. On the other hand, the height of the baffle 13 decreases from left to right. So when the raw material in the target particle size cavity 15 is under the influence of wind pressure, some of the 100cm raw material that is blown up will be blocked into the target particle size cavity 15 when it encounters the higher baffle 13. And the raw material smaller than 100cm is lighter, so it is easier to be blown to a higher position under wind pressure, thereby avoiding the influence of the baffle 13 on it. In this way, the raw material smaller than 100cm can be driven into the collection body 5 more smoothly.

[0043] Thus, through preliminary screening, raw materials of 100cm and some smaller than 100cm can be retained in the target particle size cavity 15. Then, driven by air pressure, the raw materials can be simultaneously subjected to deep screening while undergoing preliminary screening. The raw materials smaller than 100cm retained in the target particle size cavity 15 can then be screened into the collection body 5. Through multiple screenings, the target particle size of the required raw materials can be screened more accurately, so that the particle size of the screened raw materials is approximately the same.

[0044] Example 2

[0045] The difference from the above embodiment is that a functional box 10 is welded to the bottom of the screening box 1, and a second pump assembly 9 is provided inside the functional box 10. Specifically, the second pump assembly 9 is preferably an air pump. The second pump assembly 9 is connected to a plurality of air jets 8 through connecting pipes. All air jets 8 are bolted to the bottom wall of the screening box 1, and the air jets 8 are in communication with the interior of the screening box 1.

[0046] The specific implementation process is as follows: The second pump assembly 9 is turned on. Driven by the second pump assembly 9, several nozzles will spray air into the screening box 1. The bottom of the second screening plate 11 will be affected by a certain wind pressure. The raw material at the top of the second screening plate 11 will rise under the influence of wind pressure. The raw material smaller than 100cm that has fallen onto the second screening plate 11 and is blocked by the baffle 13 and is not affected by the wind pressure driven by the first pump assembly 14 will float up at this time. Thus, the second pump assembly 9 will increase the volume of raw material that floats up, thereby increasing the total amount of raw material being screened. When all the raw material on the second screening plate 11 floats up, under the lateral wind pressure of the first pump assembly 14, the raw material smaller than 100cm will flow into the collection body 5.

[0047] The vertical air pressure of the second pump assembly 9 can reduce the possibility of clogging of the screen holes 12 on the second screening plate 11. Furthermore, the intermittent opening and closing frequency of the second pump assembly 9 can reduce the amount of raw material that always floats at the bottom of the screening box 1, thus affecting the screening effect.

[0048] Example 3

[0049] The difference from the above embodiment is that the collecting body 5 is connected to a third pump assembly 7 via a connecting pipe. Specifically, the third pump assembly 7 is preferably a centrifugal pump. The output end of the third pump assembly 7 is connected to the target particle size chamber 15 inside the screening box 1 via a connecting pipe.

[0050] The specific implementation process is as follows: After a certain amount of raw material is collected in the collecting body 5, the raw material in the collecting body 5 is transported back to the target particle size chamber 15 through the third pump assembly 7, thereby allowing the raw material to be screened again. After this screening is completed, the third pump assembly 7 can be turned off, so that the particle size of the screened raw material is as large as possible to meet the required particle size.

[0051] Example 4

[0052] The difference from the above embodiment is that the screening box 1 also has a material inlet, and the material inlet is provided with a sealing plate 23, which is detachably connected to the screening box 1 by bolts.

[0053] The specific implementation process is as follows: When the screened raw material is taken out, the sealing plate 23 can be removed directly, and then the raw material in the target particle size cavity 15 can be taken out.

[0054] Example 5

[0055] The difference from the above embodiments is that, as Figure 2-3As shown, the inner wall of the screening box 1 away from the material inlet is provided with a cavity 20. The outer wall of the screening box 1 near the cavity 20 is welded with a placement box 21. A motor 22 is bolted to the placement box 21. An incomplete gear 19 is coaxially welded to the output shaft of the motor 22. The incomplete gear 19 is located inside the cavity 20.

[0056] The cavity 20 is also provided with an elliptical frame 17, and the incomplete gear 19 is located inside the elliptical frame 17. The top and bottom walls of the elliptical frame 17 are welded with several teeth 18 that can mesh with the incomplete gear 19. The two sides of the elliptical frame 17 are bolted to a telescopic rod 16, and the side of the telescopic rod 16 away from the elliptical frame 17 is welded to the side wall of the screening box 1.

[0057] The first screening plate 3 and the second screening plate 11 both pass through the side wall of the screening box 1 and extend into the cavity 20 on the side near the cavity 20. The first screening plate 3 and the second screening plate 11 are respectively welded to the top wall and bottom wall of the elliptical frame 17. The first screening plate 3 and the second screening plate 11 slide laterally with the screening box 1 on both sides along their width direction.

[0058] The specific implementation process is as follows: When the first screening plate 3 and the second screening plate 11 are screening, their screen holes 12 may become clogged. Therefore, it is necessary to reduce the possibility of clogging. The specific operation is as follows: First, start the motor 22. Under the drive of the motor 22, the incomplete gear 19 will rotate clockwise. When the incomplete gear 19 rotates clockwise, it first meshes with the inner bottom wall of the elliptical frame 17, which will cause the elliptical frame 17 to move to the left. When the teeth of the incomplete gear 19 rotate to the inner top wall of the elliptical frame 17, the incomplete gear 19 meshes with the inner top wall of the elliptical frame 17, which will cause the elliptical frame 17 to move to the right under this drive. Thus, with the rotation of the incomplete gear 19, the elliptical frame 17 can move laterally in a reciprocating manner, and the design of the telescopic rod 16 will not affect the lateral movement of the elliptical frame 17.

[0059] Since the first screening plate 3 and the second screening plate 11 are fixedly connected to the top and bottom walls of the elliptical frame 17 respectively, when the elliptical frame 17 moves laterally back and forth, the first screening plate 3 and the second screening plate 11 will also move laterally back and forth. Thus, when the raw material falls onto the first screening plate 3 and the second screening plate 11, the possibility of the raw material clogging the screen hole 12 can be reduced due to the laterally back and forth movement of the first screening plate 3 and the second screening plate 11.

[0060] Example 6

[0061] The difference from the above embodiment is that telescopic plates 4 are welded to both sides of the first screening plate 3 and the second screening plate 11 along their length direction. The side of the telescopic plate 4 away from the first screening plate 3 and the second screening plate 11 is welded to the inner wall of the screening box 1. The first screening plate 3 and the second screening plate 11 are laterally slidably engaged with the screening box 1 through the telescopic plates 4.

[0062] The specific implementation process is as follows: When the first screening plate 3 and the second screening plate 11 move laterally back and forth, the telescopic plate 4 can provide a certain support for the first screening plate 3 and the second screening plate 11 without affecting the reciprocating motion of the first screening plate 3 and the second screening plate 11.

[0063] Example 7

[0064] The difference from the above embodiment is that a handle 24 is bolted to the closed plate 23.

[0065] The specific implementation process is as follows: The operator can directly pull the closing plate 23 to remove the closing plate 23, which makes it easier to pick up the material.

[0066] Example 8

[0067] The difference from the above embodiment is that the handle 24 is provided with anti-slip texture.

[0068] The specific implementation process is as follows: The anti-slip texture design can increase the friction when the hand contacts the handle 24, thereby reducing the possibility of slipping.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A raw material screening device for mining engineering, characterized in that, The device includes a screening box, with a feeding hopper at the top that communicates with the inside of the screening box. Inside the screening box, from top to bottom, there are a first screening plate and a second screening plate. Both the first and second screening plates have a number of sieve holes. The diameter of the sieve holes on the first screening plate is larger than that on the second screening plate. The cavity between the first and second screening plates is set as a target particle size cavity. The top of the second screening plate is provided with several baffles. The baffles are attached to the inner side wall of the screening box on both sides along their length direction, and the height of the baffles decreases from left to right. The bottom of the screening box is equipped with a functional box, which contains a second pump assembly. The second pump assembly is connected to several jet nozzles via connecting pipes. All jet nozzles are fixedly connected to the bottom wall of the screening box and are in communication with the inside of the screening box. The screening box is also equipped with a material inlet, which is equipped with a sealing plate that can be detachably connected to the screening box. A collector is provided on one side of the screening box. The collector is located at the target particle size cavity and is close to the highest side of the baffle. The collector has an inlet on the side of the screening box close to the collector, and the screening box has an outlet on the side of the screening box close to the collector, which corresponds to the inlet. The collector and the screening box are connected through the inlet and outlet. The collector is connected to a third pump assembly through a connecting pipe. The output end of the third pump assembly is connected to the target particle size cavity in the screening box through a connecting pipe. The inner wall of the screening box away from the material inlet has a cavity. A placement box is fixedly connected to the outer wall of the screening box near the cavity. A motor is fixedly connected inside the placement box. An incomplete gear is coaxially fixedly connected to the output shaft of the motor. The incomplete gear is located inside the cavity. An elliptical frame is also provided inside the cavity. The incomplete gear is located inside the elliptical frame. The top and bottom walls of the elliptical frame are provided with several teeth that can mesh with the incomplete gear. Telescopic rods are fixedly connected to both sides of the elliptical frame. The side of the telescopic rod away from the elliptical frame is fixedly connected to the side wall of the screening box. The first screening plate and the second screening plate, near the cavity, both pass through the side wall of the screening box and extend into the cavity. The first screening plate and the second screening plate are fixedly connected to the top and bottom walls of the elliptical frame, respectively. The first screening plate and the second screening plate slide laterally with the screening box on both sides along their width direction. A first pump assembly is provided on the side of the screening box away from the collector, and the first pump assembly is connected to the target particle size chamber through a connecting pipe.

2. The raw material screening device for mining engineering according to claim 1, characterized in that, Both the first and second screening plates are fixedly connected to telescopic plates on both sides along their length. The side of the telescopic plate away from the first and second screening plates is fixedly connected to the inner wall of the screening box. The first and second screening plates slide laterally with the screening box through the telescopic plates.

3. The raw material screening device for mining engineering as described in claim 2, characterized in that, Handles are fixedly connected to the enclosed panel.

4. The raw material screening device for mining engineering as described in claim 3, characterized in that, The handles have anti-slip texture.

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