A coal crushing and screening integrated device

Abstract

The present application provides an integrated coal crushing and screening device, which belongs to the technical field of coal crushing and screening equipment. The integrated coal crushing and screening device includes an excavator; the movable connecting mechanism can be movably connected to the end of the forearm of the excavator in a pitching manner; the crushing bucket can be reciprocatingly connected to the bottom of the movable connecting mechanism, and the feed port of the crushing bucket faces the main body of the excavator; the two movable supporting mechanisms are symmetrically arranged on both sides of the movable connecting mechanism, and the movable ends of the movable supporting mechanisms are away from the excavator; the screening bucket is movably arranged between the ends of the two movable supporting mechanisms. The present application can combine the existing commonly used crushing bucket and screening bucket into one, significantly improve the flexibility and applicability of the equipment, and improve the efficiency of coal crushing and screening.

Description

Technical Field

[0001] The present application relates to the technical field of coal crushing and screening equipment, and in particular to an integrated coal crushing and screening device. Background Art

[0002] The main purpose of coal crushing and screening is to improve combustion efficiency, reduce equipment wear and blockage, and meet specific particle size requirements. In most cases, it is a necessary process for primary processing of coal. After coal is crushed, the surface area of ​​coal can be increased, the efficiency of heat exchange can be improved, and thus the thermal efficiency can be improved; impurities and ash in coal can also be mixed evenly with air, reducing the content of emissions; at the same time, the crushed coal can be burned more evenly, reducing incomplete combustion, thereby reducing flue gas emissions. The crushed coal can be transported through small-diameter conveying pipes and pipelines, and does not necessarily require the use of large-scale transportation equipment. As a result, coal has a smaller volume and a larger surface area, and can also be more conveniently transported and stored, significantly improving economic and environmental benefits. In order to meet different particle size requirements, coal needs to be screened after crushing. During the crushing and screening process, due to limitations of site, facilities, processing volume, and other factors, it is a common and flexible method to install a crushing bucket or screening bucket on the crushing bucket for crushing and screening.

[0003] At present, the crushing bucket or screening bucket of the excavator is usually separated and dedicated. The crushing bucket is installed when performing coal crushing operations, and the screening bucket is installed when performing coal screening operations after crushing. This is time-consuming, labor-intensive, and inefficient, which seriously affects the applicability and flexibility of the equipment. Therefore, it is urgent to improve the loading and unloading efficiency and ease of use of the equipment to improve the efficiency of coal crushing and screening operations and to improve benefits. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a coal crushing and screening integrated device, which flexibly combines a crushing bucket and a screening bucket device into a coal crushing and screening integrated device, avoiding unnecessary replacement operations of accessories, saving time and labor, reducing working hours, improving efficiency, and also improving the applicability and flexibility of the equipment, significantly improving benefits.

[0005] This application is implemented as follows:

[0006] The present application provides a coal crushing and screening integrated device comprising

[0007] excavator;

[0008] A movable connection mechanism, wherein the movable connection mechanism can be movably connected to the end of the forearm of the excavator in a pitching manner;

[0009] A crushing bucket, the crushing bucket can be reciprocatingly connected below the movable connection mechanism, and the feed port of the crushing bucket faces the main body of the excavator;

[0010] A movable support mechanism, wherein two movable support mechanisms are symmetrically arranged on both sides of the movable connection mechanism, and the movable ends of the movable support mechanisms are away from the excavator;

[0011] A screening bucket is movably arranged between the ends of the two movable supporting mechanisms.

[0012] In one embodiment of the present application, the movable connection mechanism includes a first connecting plate, a second connecting plate, a first connecting column and a second connecting column, the second connecting plates are arranged in parallel below the first connecting plate, and the upper side of the first connecting plate can be movably connected to the end of the forearm of the excavator in a pitching manner; four first connecting columns are symmetrically arranged at the four ends of the first connecting plate and the second connecting plate, the first connecting column slides through the first connecting plate and its lower end is fixedly connected to the upper side of the second connecting plate, two second connecting columns are arranged in parallel at the two ends of the lower side of the second connecting plate, and the second connecting column and the forearm of the excavator are arranged in the forward direction; a first spring is arranged on the outside of the first connecting column, and the two ends of the first spring are respectively fixedly connected to the upper end of the first connecting column and the upper side of the first connecting plate, and two second springs are symmetrically arranged on the outside of the two ends of the second connecting column, and one end of the second spring is fixedly connected to the lower side of the second connecting plate.

[0013] In one embodiment of the present application, two first brackets are symmetrically arranged in the middle of both ends of the upper side of the first connecting plate, and two first electromagnets are symmetrically arranged on both sides of the first bracket, and the iron core of the first electromagnet and the upper end of the first connecting column are arranged correspondingly.

[0014] In one embodiment of the present application, two first connecting blocks are symmetrically arranged on the upper side of the crushing bucket, the second connecting column slides through the first connecting block, and the other end of the second spring is fixedly connected to the first connecting block; two second electromagnets are symmetrically arranged in the middle of both sides of the second connecting plate, and the two second electromagnets are respectively arranged above the two first connecting blocks.

[0015] In one embodiment of the present application, the movable support mechanism includes a connecting seat, a second bracket and a hydraulic cylinder, the two connecting seats are symmetrically arranged on both sides of the second connecting plate, the second bracket is arranged in the forward direction of the connecting seat away from the end of the excavator, the hydraulic cylinder is arranged inside the connecting seat, and the piston rod of the hydraulic cylinder slides through the outer end of the connecting seat and extends to the inside of the second bracket.

[0016] In one embodiment of the present application, a first connecting shaft is coaxially arranged at the end of the piston rod of the hydraulic cylinder, the first connecting shaft slides through the end of the second bracket away from the connecting seat, and a swing cylinder is arranged at the outer end of the first connecting shaft.

[0017] In one embodiment of the present application, the screening bucket includes a connecting frame, a drum screen and a motor, the two ends of the upper side of the connecting frame are symmetrically fixedly connected to the output ends of the two swing cylinders, the bottom center of the drum screen is rotatably arranged inside the back side of the connecting frame, the motor is arranged outside the back side of the connecting frame, the output end of the motor rotates through the back side of the connecting frame and its end is fixedly connected to the bottom center of the drum screen.

[0018] In one embodiment of the present application, a first connecting ring is provided below one end of the connecting frame close to the discharge port of the crushing bucket, and the feed port end of the drum screen rotates and passes through the first connecting ring.

[0019] In one embodiment of the present application, a plurality of sieve holes are evenly opened on the circumference of the drum screen, the diameter of the sieve holes increases toward the bottom of the drum screen, and the number of the sieve holes decreases toward the bottom of the drum screen.

[0020] In one embodiment of the present application, a plurality of chutes extending from the feed port to the bottom are evenly arranged on the inner circumference of the drum screen.

[0021] In one embodiment of the present application, the coal crushing and screening integrated device further includes:

[0022] A variable screening mechanism is reciprocatably arranged inside the drum screen.

[0023] In one embodiment of the present application, the variable screening mechanism includes a second connecting ring, a rotating drum and a friction plate. The second connecting ring is fixedly arranged outside the discharge port of the crushing bucket, one end of the rotating drum is rotatably connected to the second connecting ring, the other end of the rotating drum faces the feed port of the drum screen and is closed, and the friction plate is arranged on the outside of the edge of the other end of the rotating drum.

[0024] In one embodiment of the present application, the variable screening mechanism also includes a third connecting ring, a third connecting plate, an elastic connecting member and a convex bottom. The third connecting ring and the friction plate are arranged correspondingly. The convex bottom is arranged inside the drum screen and its edge is attached to the inner side of the drum screen. A plurality of the third connecting plates are evenly distributed between the third connecting ring and the convex bottom. The two ends of the third connecting plate are respectively fixedly connected to the outer side of the third connecting ring and the edge of the convex bottom, and the third connecting plate is slidably arranged inside the slide groove. A plurality of the elastic connecting members are evenly arranged around the outer side of the first connecting ring, and the movable end of the elastic connecting member is fixedly connected to the outer side of the third connecting ring.

[0025] In one embodiment of the present application, the elastic connecting member includes a second connecting block, a sleeve, a second connecting shaft and a third spring, the second connecting block is fixedly connected to the outer side of the first connecting ring, the sleeve and the drum screen are arranged in the same direction and one end thereof is fixedly connected to the second connecting block, one end of the second connecting shaft slides through the second connecting block and the sleeve, and the other end of the second connecting shaft is fixedly connected to the outer side of the third connecting ring; the second connecting shaft passes through the third spring, and both ends of the third spring are respectively fixedly connected to the second connecting block and the outer end of the second connecting shaft.

[0026] The beneficial effect of the present application is that the present application obtains a coal crushing and screening integrated device through the above design. When in use, the crushing bucket is connected to the end of the forearm of the excavator in a pitching manner through a movable connection mechanism, and the feed port of the screening bucket is movably arranged at the discharge port end of the crushing bucket toward the discharge port of the crushing bucket through a movable support mechanism. The screening bucket and the crushing bucket can be brought close to or separated through the movable support mechanism, and the screening bucket can also be separated and appropriately flipped according to actual needs so as not to affect the coal digging of the crushing bucket. After the coal is crushed by the crushing bucket, it can be directly input into the screening bucket from the discharge port. The flexibility of the movable connection mechanism cooperates with the vibration generated when the crushing bucket is running, which is conducive to the screening operation. Even wet coal can be well screened; it can also be screened step by step according to different final particle size requirements. In this way, the crushing bucket and the screening bucket can be flexibly combined into a coal crushing and screening integrated device, and the crushing and screening of coal can be carried out at the same time, which greatly reduces the number of loading and unloading of the equipment, saves time and effort, and takes up less working hours, improves efficiency, expands the scope of application and flexibility of the equipment, and significantly improves benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of a coal crushing and screening integrated device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of the movable connection mechanism, crushing bucket, movable support mechanism, screening bucket and variable screening mechanism provided in the embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a crushing bucket, a movable support mechanism, a screening bucket and a variable screening mechanism provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a crushing bucket, a screening bucket and a variable screening mechanism provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of the movable connection mechanism provided in the embodiment of the present application;

[0033] Figure 6 A schematic diagram of the three-dimensional structure of the movable connection mechanism provided in the embodiment of the present application;

[0034] Figure 7 A schematic diagram of the structure of the movable connection mechanism and the crushing bucket provided in the embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a crushing bucket, a first connecting block, a second connecting ring and a rotating drum provided in an embodiment of the present application;

[0036] Fig. 9 A schematic diagram of the structure of a crushing bucket, a second connecting ring, a rotating drum and a friction plate provided in an embodiment of the present application;

[0037] Fig.10 A schematic diagram of the structure of the movable connection mechanism, movable support mechanism and screening bucket provided in the embodiment of the present application;

[0038] Fig.11 A schematic diagram of the structure of a screening bucket and a variable screening mechanism provided in an embodiment of the present application;

[0039] Fig.12 A schematic diagram of the structure of a variable screening mechanism provided in an embodiment of the present application.

[0040] In the figure: 10, excavator; 20, movable connection mechanism; 21, first connection plate; 22, second connection plate; 23, first connection column; 231, first spring; 24, second connection column; 241, second spring; 25, first bracket; 26, first electromagnet; 27, second electromagnet; 30, crushing bucket; 31, first connection block; 40, movable support mechanism; 41, connection seat; 42, second bracket; 43, hydraulic cylinder; 44, first connection shaft; 45. Swing cylinder; 50. Screening bucket; 51. Connecting frame; 511. First connecting ring; 52. Drum screen; 521. Screen hole; 522. Slideway; 53. Motor; 60. Variable screening mechanism; 61. Second connecting ring; 62. Rotating drum; 63. Friction plate; 64. Third connecting ring; 65. Third connecting plate; 66. Elastic connecting member; 661. Second connecting block; 662. Sleeve; 663. Second connecting shaft; 664. Third spring; 67. Convex bottom. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Example

[0044] like Figure 1As shown, according to an embodiment of the present application, a coal crushing and screening integrated device includes an excavator 10, an active connection mechanism 20, a crushing bucket 30, an active support mechanism 40, a screening bucket 50 and a variable screening mechanism 60. The active connection mechanism 20 can be movably connected to the end of the forearm of the excavator 10 in a pitching manner, and the crushing bucket 30 can be reciprocatingly connected below the active connection mechanism 20. The feed port of the crushing bucket 30 faces the main body of the excavator 10. Two active support mechanisms 40 are symmetrically arranged on both sides of the active connection mechanism 20. The active end of the active support mechanism 40 is away from the excavator 10. The screening bucket 50 is 50 is movably arranged between the ends of the two movable supporting mechanisms 40. The screening bucket 50 can be engaged or separated through the discharge port of the movable supporting mechanism 40 and the crushing bucket 30. The movable supporting mechanism 40 can also flip the screening bucket 50 so that it does not hinder the crushing bucket 30 from digging coal for crushing operations. When the crushed coal is input into the screening bucket 50 for screening, the vibration of the crushing bucket 30 can be extended to the screening bucket 50 through the movable connecting mechanism 20, so that the entire coal crushing and screening integrated device vibrates, which is beneficial to screening. Flexible graded screening can be achieved through the variable screening mechanism 60 to meet the screening requirements of different particle sizes.

[0045] According to some embodiments of the present application, Figure 2 , Figure 5-Figure 7 and Fig.10As shown, a movable connection mechanism 20 can be movably connected to the end of the forearm of the excavator 10 in a pitching manner; the movable connection mechanism 20 includes a first connecting plate 21, a second connecting plate 22, a first connecting column 23 and a second connecting column 24, the second connecting plate 22 is correspondingly arranged in parallel below the first connecting plate 21, and the upper side of the first connecting plate 21 can be movably connected to the end of the forearm of the excavator 10 in a pitching manner; four first connecting columns 23 are symmetrically arranged at the four ends of the first connecting plate 21 and the second connecting plate 22, the first connecting column 23 slides through the first connecting plate 21 and its lower end is fixedly connected to the upper side of the second connecting plate 22, two second connecting columns 24 are arranged in parallel at the two ends of the lower side of the second connecting plate 22, and the second connecting column 24 and the forearm of the excavator 10 are arranged in the forward direction; a first spring 231 is arranged on the outside of the first connecting column 23, and the two ends of the first spring 231 are respectively fixedly connected to the upper end of the first connecting column 23 and the upper side of the first connecting plate 21, and the two ends of the second connecting column 24 are external Two second springs 241 are symmetrically arranged, one end of the second spring 241 is fixedly connected to the lower side of the second connecting plate 22, two first brackets 25 are symmetrically arranged in the middle of the two ends of the upper side of the first connecting plate 21, and two first electromagnets 26 are symmetrically arranged on both sides of the first bracket 25. The iron core of the first electromagnet 26 and the upper end of the first connecting column 23 are arranged correspondingly. Due to the elastic force of the first spring 231, when the crushing bucket 30 starts, vibration is generated, which drives the second connecting plate 22 to vibrate under the first connecting plate 21. Since the movable supporting mechanism 40 is arranged on the second connecting plate 22, the vibration generated when the crushing bucket 30 starts the operation will be transmitted to the screening bucket 50, which is more conducive to screening coal; when the crushing bucket 30 needs to dig coal, the first electromagnet 26 is used to lock the first connecting column 23, so that the first connecting plate 21 and the second connecting plate 22 form a stable structure, and the first connecting column 23 or its upper end is made of steel that can be magnetically attracted, so that it is convenient for the crushing bucket 30 to dig coal without bouncing.

[0046] According to some embodiments of the present application, Figure 2-Figure 3 and Fig.10As shown, the crushing bucket 30 can be reciprocatingly connected below the movable connection mechanism 20, the feed port of the crushing bucket 30 faces the main body of the excavator 10, and two first connection blocks 31 are symmetrically arranged on the upper side of the crushing bucket 30, the second connection column 24 slides through the first connection block 31, and the other end of the second spring 241 is fixedly connected to the first connection block 31; two second electromagnets 27 are symmetrically arranged in the middle of both sides of the second connection plate 22, and the two second electromagnets 27 are respectively arranged above the two first connection blocks 31. When the crushing bucket 30 is started, the first connection block 31 will cooperate with the elastic force of the second spring 241 on the second connection column 24, and reciprocate due to vibration. Therefore, the vibration generated after the crushing bucket 30 is started is more conducive to its own discharge. When the variable screening mechanism 60 is in a combined state or the crushing bucket 30 is to dig coal, the first connection block 31 is locked by the second electromagnet 27. The first connection block 31 is made of magnetically attracted steel, so that the crushing bucket 30 no longer moves longitudinally, which is conducive to graded screening or smooth coal digging.

[0047] According to some embodiments of the present application, Figure 2-Figure 3 and Fig.10 As shown, two movable support mechanisms 40 are symmetrically arranged on both sides of the movable connection mechanism 20, and the movable end of the movable support mechanism 40 is far away from the excavator 10. The movable support mechanism 40 includes a connecting seat 41, a second bracket 42 and a hydraulic cylinder 43. The two connecting seats 41 are symmetrically arranged on both sides of the second connecting plate 22, and the second bracket 42 is arranged in the forward direction at the end of the connecting seat 41 away from the excavator 10. The hydraulic cylinder 43 is arranged inside the connecting seat 41, and the piston rod of the hydraulic cylinder 43 slides through the outer end of the connecting seat 41 and extends to the inside of the second bracket 42. The piston rod end of the hydraulic cylinder 43 is coaxially arranged with a first connecting shaft 44, and the first connecting shaft 44 slides through the second bracket 4 2 is far away from the connecting seat 41, and a swing cylinder 45 is arranged at the outer end of the first connecting shaft 44. The first connecting shaft 44 slides through the far end of the second bracket 42 and is buried in the far end of the second bracket 42 for a certain distance, so that the first connecting shaft 44 has sufficient bearing capacity to avoid the hydraulic cylinder 43 from generating a lateral load and protect the hydraulic cylinder 43; the two hydraulic cylinders 43 can synchronously connect or separate the feed port of the screening bucket 50 and the discharge port of the crushing bucket 30. When the crushing bucket 30 needs to dig coal, after the hydraulic cylinder 43 separates the screening bucket 50 from the crushing bucket 30, the screening bucket 50 can be synchronously turned over by the two swing cylinders 45 according to the actual situation so that it does not hinder the crushing bucket 30 from digging coal.

[0048] According to some embodiments of the present application, Figure 1-Figure 4 , Figure 5-Figure 6 and Figure 10-11As shown, the screening bucket 50 is movably arranged between the ends of the two movable supporting mechanisms 40, and the screening bucket 50 includes a connecting frame 51, a drum screen 52 and a motor 53. The two ends of the upper side of the connecting frame 51 are symmetrically fixedly connected to the output ends of the two swing cylinders 45, and the bottom center of the drum screen 52 is rotatably arranged inside the back side of the connecting frame 51. The motor 53 is arranged outside the back side of the connecting frame 51. The output end of the motor 53 rotates through the back side of the connecting frame 51 and its end is fixedly connected to the bottom center of the drum screen 52. The connecting frame 51 is close to the crushing A first connecting ring 511 is provided below one end of the discharge port of the bucket 30, and the feed port end of the drum screen 52 rotates and passes through the first connecting ring 511. A plurality of sieve holes 521 are evenly provided on the circumference of the drum screen 52. The diameter of the sieve holes 521 increases toward the bottom of the drum screen 52, and the number of the sieve holes 521 decreases toward the bottom of the drum screen 52. The first connecting ring 511 can provide sufficient supporting force for the drum screen 52. When the crushed coal is input into the drum screen 52, the motor 53 will drive the drum screen 52 to rotate and then screen the coal.

[0049] According to some embodiments of the present application, Figure 2-Figure 4 , Figure 8-Figure 9 and Figure 11-Figure 12As shown, one of the important purposes of coal screening is to obtain coal of different particle sizes, but the existing drum screens 52 are mostly special and dedicated, and it is difficult to achieve synchronous grading screening. In actual operations, it is necessary to replace the screening bucket 50 with a drum screen 52 of different models according to different screening particle size requirements. This requires a certain frequency of changing and loading and unloading of accessories, and it is difficult to further improve production efficiency. The variable screening mechanism 60 can be reciprocatingly arranged inside the drum screen 52. The variable screening mechanism 60 includes a second connecting ring 61, a rotating drum 62 and a friction plate 63. The second connecting ring 61 is fixedly arranged outside the discharge port of the crushing bucket 30. One end of the rotating drum 62 is rotatably connected to the second connecting ring 61, and the other end of the rotating drum 62 faces the feed port of the drum screen 52 and is closed. The friction plate 63 is arranged on the outer side of the edge of the other end of the rotating drum 62. The variable screening mechanism 60 also includes a third connecting ring 64, a third connecting plate 65, an elastic connecting member 66 and a convex bottom 67. The third connecting ring 64 and the friction plate 63 are arranged correspondingly, and the convex bottom 67 is arranged on the drum screen. 52 inside and its edge is attached to the inner side of the drum screen 52, a plurality of third connecting plates 65 are evenly distributed between the third connecting ring 64 and the convex bottom 67, the two ends of the third connecting plate 65 are respectively fixedly connected to the outer side of the third connecting ring 64 and the edge of the convex bottom 67, and the third connecting plate 65 is slidably arranged inside the slide groove 522; a plurality of elastic connecting members 66 are evenly arranged around the outer side of the first connecting ring 511, and the movable end of the elastic connecting member 66 is fixedly connected to the outer side of the third connecting ring 64, and the elastic connecting member 66 includes a second connecting block 661, a sleeve 662, a second connecting shaft 663 and a third spring 664, and the second connecting block 661 is fixedly connected On the outside of the first connecting ring 511, the sleeve 662 and the drum screen 52 are arranged in the forward direction and one end thereof is fixedly connected to the second connecting block 661, one end of the second connecting shaft 663 slides through the second connecting block 661 and the sleeve 662, and the other end of the second connecting shaft 663 is fixedly connected to the outside of the third connecting ring 64; the second connecting shaft 663 penetrates the third spring 664, and the two ends of the third spring 664 are respectively fixedly connected to the second connecting block 661 and the outer end of the second connecting shaft 663, and the initial position of the convex bottom 67 is located below the finest sieve hole 521 in the drum screen 52. After the crushing bucket 30 digs coal, the excavator 10 lifts and flips the feeding of the crushing bucket 30 The opening is inclined upward at a suitable angle to match the closing setting of the rotating drum 62 so that the crushed coal can smoothly enter the drum screen 52, and the first connecting block 31 is locked by the second electromagnet 27. At the same time, the two hydraulic cylinders 43 drive the drum screen 52 to approach the crushing bucket 30 until the friction plate 63 and the third connecting ring 64 are engaged, and the crushing bucket 30 is started to start the coal crushing operation. The crushed coal is continuously input into the drum screen 52, and the motor 53 is started to drive the drum screen 52 to rotate for crushed coal screening; after the crushing bucket 30 is started, obvious vibration will be generated, which will also be transmitted to the drum screen 52 through the movable connecting mechanism 20 and the movable supporting mechanism 40, which is more conducive to the screening of crushed coal in the drum screen 52;After the finer crushed coal is screened out through the smaller sieve holes 521, the excavator 10 rotates to shift the drum screen 52, and then the gradual contraction of the two hydraulic cylinders 43 will gradually drive the drum screen 52 close to the crushing bucket 30, further pressuring the third connecting ring 64, and the second connecting shaft 663 will be retracted into the sleeve 662 under the support of the elastic force of the third spring 664, pressing the third connecting ring 64 on the friction plate 63, and the rotating drum 62 rotates with the drum screen 52, without hindering the conveying of crushed coal and the rolling screening of the drum screen 52, so that the convex bottom 67 is located at a different position inside the drum screen 52, and since the diameter of the sieve holes 521 on the peripheral side of the drum screen 52 is facing The amount of coal increases toward the bottom of the drum screen 52 and decreases toward the bottom of the drum screen 52. The convex bottom 67 continues to go deep into the drum screen 52 to a certain distance. The unscreened broken coal in the drum screen 52 will reach the larger screen hole 521, and the larger particles will be screened out. The remaining amount of broken coal in the drum screen 52 will become less and less as the coal particles of different particle sizes are screened out, until the largest particles are screened out, or remain in the drum screen 52 for pouring out. By analogy and repeating the operation, the broken coal in the drum screen 52 will be screened out step by step into different particle sizes, and different falling piles can be synchronously achieved with the rotation of the excavator 10 for transportation. Then, the coal is dug again through the crushing bucket 30 to start a new round of operations. In this way, the purpose of synchronous graded screening during coal crushing and screening can be achieved, and there is no need to frequently replace the screening bucket 50 for different models of the drum screen 52, which further improves the continuity and efficiency of production. ;

[0050] Specifically, the working principle of the coal crushing and screening integrated device is as follows: when in use, the initial position of the convex bottom 67 is first set below the finest sieve hole 521 inside the drum screen 52, the first connecting column 23 is locked by the first electromagnet 26, and the first connecting block 31 is locked by the second electromagnet 27. After the crushing bucket 30 digs the coal, the excavator 10 lifts and turns the feed port of the crushing bucket 30 upward at a suitable angle to cooperate with the closing setting of the rotating drum 62 so that the crushed coal can smoothly enter the drum screen 52, and at the same time, the two hydraulic cylinders 43 drive the drum screen 52 to approach the crushing bucket 30 until the friction plate 63 and the third connecting ring 64 are made to move. The first electromagnet 26 unlocks the first connecting column 23, starts the crushing bucket 30 to start the coal crushing operation, and the crushed coal is continuously input into the drum screen 52. At the same time, the motor 53 is started to drive the drum screen 52 to rotate for crushed coal screening; after the crushing bucket 30 is started, it will produce obvious vibration, driving the second connecting plate 22 to vibrate under the first connecting plate 21. Since the movable supporting mechanism 40 is arranged on the second connecting plate 22, the vibration generated when the crushing bucket 30 starts the operation will be transmitted to the drum screen 52, which is more conducive to the screening of crushed coal in the drum screen 52, especially the screening of wet coal; the finer crushed coal passes through the smaller sieve holes 5 After the 21 is screened out, the excavator 10 rotates to shift the drum screen 52, and then the gradual contraction of the two hydraulic cylinders 43 will gradually drive the drum screen 52 close to the crushing bucket 30, further pressuring the third connecting ring 64, and the second connecting shaft 663 will be retracted into the sleeve 662 under the support of the elastic force of the third spring 664, pressing the third connecting ring 64 on the friction plate 63, and the rotating drum 62 rotates with the drum screen 52, without hindering the transportation of crushed coal and the rolling screening of the drum screen 52, so that the convex bottom 67 is located at a different position inside the drum screen 52, because the diameter of the screen hole 521 on the side of the drum screen 52 faces the drum screen 52 The number of particles increases gradually from the bottom of the drum screen 52 to the bottom of the drum screen 52, and decreases gradually toward the bottom of the drum screen 52. The convex bottom 67 continues to penetrate into the drum screen 52 to a certain distance. The unscreened broken coal in the drum screen 52 will reach the larger screen hole 521, and the larger particles will be screened out. The remaining amount of broken coal in the drum screen 52 will become less and less as the coal particles of different particle sizes are screened out, until the largest particles are screened out, or remain in the drum screen 52 for pouring out. By analogy and repeating the operation, the broken coal in the drum screen 52 will be screened out step by step into different particle sizes, and different piles can be synchronously realized with the rotation of the excavator 10 for transportation. The first connecting column 23 is locked again by the first electromagnet 26. If the friction plate 63 and the third connecting ring 64 are in a disengaged state, the second electromagnet 27 unlocks the first connecting block 31, so that the crushing bucket 30 can vibrate longitudinally, which is conducive to the discharge of the crushing bucket 30. Then, the crushing bucket 30 is used to dig coal again to start a new round of operations.In this way, the crushing bucket 30 and the screening bucket 50 can be flexibly combined into one to form an integrated coal crushing and screening device. The coal crushing and screening can be carried out at the same time, and graded screening can be achieved simultaneously, which greatly reduces the number of loading and unloading times of the equipment, saves time and effort, reduces working hours, improves efficiency, expands the scope of application and flexibility of the equipment, and significantly improves benefits.

[0051] It should be noted that the specific models and specifications of the excavator 10, the first spring 231, the second spring 241, the first electromagnet 26, the second electromagnet 27, the crushing bucket 30, the hydraulic cylinder 43, the swing cylinder 45, the screening bucket 50, the drum screen 52 and the motor 53 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0052] The power supply and principle of the first electromagnet 26, the second electromagnet 27 and the motor 53 are clear to those skilled in the art and will not be described in detail here.

[0053] The above are only preferred implementations of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A coal crushing and screening integrated device, characterized in that: include Excavator (10); A movable connection mechanism (20), wherein the movable connection mechanism (20) is movably connected to the end of the forearm of the excavator (10) in a pitching manner; the movable connection mechanism (20) comprises a first connection plate (21), a second connection plate (22), a first connection column (23) and a second connection column (24), wherein the second connection plates (22) are arranged in parallel below the first connection plate (21), and the upper side of the first connection plate (21) is movably connected to the end of the forearm of the excavator (10) in a pitching manner; four first connection columns (23) are symmetrically arranged at four ends of the first connection plate (21) and the second connection plate (22), and the first connection columns (23) slide through the first connection plate (21) and the second connection plate (22). A first connecting plate (21) having a lower end fixedly connected to the upper side of the second connecting plate (22); two second connecting columns (24) are arranged in parallel at the two ends of the lower side of the second connecting plate (22); the second connecting column (24) and the forearm of the excavator (10) are arranged in the forward direction; a first spring (231) is arranged outside the first connecting column (23); the two ends of the first spring (231) are respectively fixedly connected to the upper end of the first connecting column (23) and the upper side of the first connecting plate (21); two second springs (241) are symmetrically arranged outside the two ends of the second connecting column (24); one end of the second spring (241) is fixedly connected to the lower side of the second connecting plate (22); a crushing bucket (30), the crushing bucket (30) being reciprocatably connected to the bottom of the movable connection mechanism (20), the feed port of the crushing bucket (30) facing the main body of the excavator (10); two first connection blocks (31) are symmetrically arranged on the upper side of the crushing bucket (30), the second connection column (24) slidably penetrates the first connection block (31), and the other end of the second spring (241) is fixedly connected to the first connection block (31); A movable support mechanism (40), wherein two movable support mechanisms (40) are symmetrically arranged on both sides of the movable connection mechanism (20), the movable ends of the movable support mechanisms (40) are away from the excavator (10), and the movable support mechanisms (40) are arranged on the second connection plate (22); A screening bucket (50) is movably arranged between the ends of the two movable supporting mechanisms (40).

2. The coal crushing and screening integrated device according to claim 1, characterized in that: Two first brackets (25) are symmetrically arranged in the middle of the two ends of the upper side of the first connecting plate (21), and two first electromagnets (26) are symmetrically arranged on both sides of the first bracket (25), and the iron core of the first electromagnet (26) and the upper end of the first connecting column (23) are arranged correspondingly.

3. The coal crushing and screening integrated device according to claim 1, characterized in that: Two second electromagnets (27) are symmetrically arranged in the middle of both sides of the second connection plate (22), and the two second electromagnets (27) are respectively and correspondingly arranged above the two first connection blocks (31).

4. The coal crushing and screening integrated device according to claim 1, characterized in that: The movable support mechanism (40) comprises a connecting seat (41), a second bracket (42) and a hydraulic cylinder (43); the two connecting seats (41) are symmetrically arranged on both sides of the second connecting plate (22); the second bracket (42) is arranged in the forward direction at one end of the connecting seat (41) away from the excavator (10); the hydraulic cylinder (43) is arranged inside the connecting seat (41); and the piston rod of the hydraulic cylinder (43) slides through the outer end of the connecting seat (41) and extends into the second bracket (42).

5. The coal crushing and screening integrated device according to claim 4, characterized in that: A first connecting shaft (44) is coaxially arranged at the end of the piston rod of the hydraulic cylinder (43); the first connecting shaft (44) slides through an end of the second bracket (42) away from the connecting seat (41); and a swing cylinder (45) is arranged at the outer end of the first connecting shaft (44).

6. The coal crushing and screening integrated device according to claim 5, characterized in that: The screening bucket (50) comprises a connecting frame (51), a drum screen (52) and a motor (53); the two ends of the upper side of the connecting frame (51) are symmetrically fixedly connected to the output ends of the two swing cylinders (45); the bottom center of the drum screen (52) is rotatably arranged inside the back side of the connecting frame (51); the motor (53) is arranged outside the back side of the connecting frame (51); the output end of the motor (53) rotates through the back side of the connecting frame (51) and its end is fixedly connected to the bottom center of the drum screen (52).

7. The coal crushing and screening integrated device according to claim 6, characterized in that: A first connection ring (511) is provided below one end of the connection frame (51) close to the discharge port of the crushing bucket (30), and the feed port end of the drum screen (52) rotates and passes through the first connection ring (511).

8. The coal crushing and screening integrated device according to claim 6, characterized in that: A plurality of sieve holes (521) are evenly arranged on the circumference of the drum screen (52), the diameter of the sieve holes (521) increases towards the bottom of the drum screen (52), and the number of the sieve holes (521) decreases towards the bottom of the drum screen (52).

9. The coal crushing and screening integrated device according to claim 7, characterized in that: A plurality of chutes (522) extending from the feed inlet to the bottom are evenly arranged on the inner circumference of the drum screen (52).

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