Crushing and screening linkage device for adapting raw coal of coal mine to boiler of power plant

Abstract

The utility model discloses a crushing and screening linkage device of coal mine raw coal and power plant boiler adaptation relates to the field of coal mine, including the casing, the connecting ring and left crushing roller, the inside one side fixed connection of casing has first drive, and the one side swing mounting of connecting ring has the coarse screening cylinder, and the one side swing mounting of coarse screening cylinder has the fine screening cylinder, and the top of connecting ring and fine screening cylinder all swing mounting has fixed peg, the inside one side swing mounting of casing has left crushing roller, and the inside one side fixed connection of casing has the right crushing roller of pusher support frame swing mounting, and the output of second drive is fixedly connected with right crushing roller, the utility model discloses through the flexible assembly screening cylinder and the design of convenient dismounting, the quick switching screening parameter, adapts the demand of variety, and cooperate drive part and guide frame, guarantee fine raw coal stable discharge, improve preprocessing efficiency and continuity, through the crushing structure of adjustable, satisfy more crushing demand.

Description

Technical Field

[0001] This utility model belongs to the field of coal mining, specifically a crushing and screening linkage device adapted to raw coal in coal mines and boilers in power plants. Background Technology

[0002] In the coal mining and power plant energy supply system, raw coal needs to be crushed and screened to make its particle size suitable for the feed and combustion requirements of power plant boilers. Boilers require raw coal of a specific particle size to ensure complete combustion and stable thermal efficiency. Therefore, crushing and screening devices that are compatible with raw coal and power plant boilers become key equipment connecting the two. Their core function is to separate qualified fine coal through screening and crush excessive coarse coal to provide boilers with fuel that meets particle size standards and ensure the stable operation of the power plant's power generation system.

[0003] Currently, the screening components of existing crushing and screening devices have relatively complex structures, most of which are non-replaceable or have a lock-on operation. Changing to different specifications of screening cylinders requires a lot of time and is difficult to quickly adapt to the changing coal demand of power plant boilers. Utility Model Content

[0004] The purpose of this utility model is to provide a crushing and screening linkage device that is compatible with raw coal in coal mines and boilers in power plants, so as to solve the problem that most existing technologies have non-replaceable or replaceable operation lock-in structures, which are difficult to quickly adapt to the changing coal demand of power plant boilers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crushing and screening linkage device adapted for coal mine raw coal and power plant boilers, comprising a shell, a connecting ring, and a left crushing roller; a first driving member is fixedly connected to one side inside the shell, the output end of the first driving member is fixedly connected to the connecting ring, a coarse screening cylinder is movably installed on one side of the connecting ring, a fine screening cylinder is movably installed on one side of the coarse screening cylinder, and fixing bolts are movably installed on the top of both the connecting ring and the fine screening cylinder; a left crushing roller is movably installed on one side inside the shell, a pushing member is fixedly connected to one side of the shell, a support frame is fixedly connected to one side of the pushing member, a right crushing roller is movably installed on the inner side of the support frame, a second driving member is fixedly connected to one end of the support frame, and the output end of the second driving member is fixedly connected to the right crushing roller.

[0006] Preferably, a third driving component is fixedly connected to the bottom end of the shell surface, the output end of the third driving component is fixedly connected to the left crushing roller, a collar is movably installed around the connecting ring, and a feed hopper is fixedly connected to the top of the collar.

[0007] Preferably, a guide frame is fixedly connected inside the shell at the bottom of the coarse screening cylinder, and a discharge pipe is fixedly connected to the bottom of the guide frame.

[0008] Preferably, the top of the coarse screening cylinder and the fine screening cylinder are provided with bolt holes, and the fixing bolts are threadedly connected to the bolt holes. Connecting brackets are fixedly connected to both sides of the bottom of the shell.

[0009] Preferably, a support roller is installed at the bottom of the housing, and the support roller is fitted with a connecting ring.

[0010] Preferably, a maintenance door is movably installed at the top of the housing surface, and a handle is fixedly connected to the surface of the maintenance door.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model flexibly selects and quickly assembles coarse and fine screening cylinders of corresponding specifications according to the coal requirements of power plant boilers. With the convenient disassembly design of the fixing bolts, the device can efficiently switch between different screening parameters. It can accurately screen out fine raw coal that meets the standards for direct use in boilers, and can quickly adapt to diverse raw coal screening needs. It avoids the problem of insufficient adaptability caused by fixed screening specifications, and shortens the replacement time of screening components, improving the flexibility and efficiency of raw coal pretreatment. The first driving component drives the screening components to rotate stably. With the directional collection and discharge design of the guide frame, it can ensure that the fine raw coal is discharged quickly and orderly after screening, reducing the accumulation and loss of materials in the device, ensuring the continuity and stability of the screening process, and providing a continuous supply of qualified raw materials for subsequent boiler coal supply.

[0013] 2. This utility model uses the synergistic effect of the second driving component and the power device of the left crushing roller to drive the two crushing rollers to efficiently crush large coal particles after screening. It can also adjust the pushing component to drive the support frame and the right crushing roller to flexibly adjust the distance, so as to accurately control the particle size of the crushed coal particles, meet the adaptation requirements of different boilers for the size of coal particles, and avoid the problem of low boiler combustion efficiency caused by the single crushing particle size. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the internal structure provided for an embodiment of the present utility model;

[0016] Figure 2 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0017] Figure 3This is a partial structural diagram of the guide frame and discharge pipe provided in an embodiment of the present utility model;

[0018] Figure 4 A partial structural diagram of the coarse screening cylinder and the plug hole provided in an embodiment of this utility model.

[0019] In the picture:

[0020] 1. Feed hopper; 2. Shell; 201. Connecting frame; 202. Maintenance door; 3. Connecting ring; 301. Fixing bolt; 4. First drive component; 5. Shaft collar; 6. Support roller; 7. Guide frame; 701. Discharge pipe; 8. Left crushing roller; 9. Second drive component; 10. Support frame; 11. Pushing component; 12. Fine screening cylinder; 13. Coarse screening cylinder; 14. Third drive component; 15. Right crushing roller; 16. Bolt hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] As attached Figure 1 To be continued Figure 4 As shown:

[0023] Example 1: This utility model provides a crushing and screening linkage device adapted to coal mine raw coal and power plant boiler, including a shell 2, a connecting ring 3 and a left crushing roller 8; a first driving member 4 is fixedly connected to one side inside the shell 2, and the output end of the first driving member 4 is fixedly connected to the connecting ring 3. A coarse screening cylinder 13 is movably installed on one side of the connecting ring 3, and a fine screening cylinder 12 is movably installed on one side of the coarse screening cylinder 13. Fixing bolts 301 are movably installed on the top of both the connecting ring 3 and the fine screening cylinder 12; the left crushing roller 8 is movably installed on one side inside the shell 2, and a right crushing roller 15 is movably installed on the inner side of the support frame 10. A second driving member 9 is fixedly connected to one end of the support frame 10, and the output end of the second driving member 9 is fixedly connected to the right crushing roller 15.

[0024] First, based on the power plant boiler's requirements for raw coal particle size, the staff selected coarse screening cylinder 13 and fine screening cylinder 12 of appropriate size and screen mesh. By aligning one side of the coarse screening cylinder 13 with the connecting ring 3 and the other side with the fine screening cylinder 12, the first driving component 4, connecting ring 3, coarse screening cylinder 13, and fine screening cylinder 12 are all tilted at 30°. Then, the fixing bolts 301 at the top of the connecting ring 3 and the fine screening cylinder 12 are tightened, ensuring the fixing bolts 301 are threaded into the bolt holes 16 at the top of the coarse screening cylinder 13 and the fine screening cylinder 12, thus completing the installation and fixing of the screening components. Subsequently, raw coal is introduced into the device through the feed hopper 1, and then enters the coarse screening cylinder 13 and the fine screening cylinder 12 via the shaft collar 5. Simultaneously, the first driving component 4 is activated, driving the connecting ring 3 to rotate, which in turn drives the coarse screening cylinder... Coarse screening cylinder 13 rotates synchronously with fine screening cylinder 12, using their screens to classify and screen the raw coal. Fine raw coal that meets the particle size requirements passes through the screen and falls into the guide frame 7 at the bottom of coarse screening cylinder 13, and is then discharged through the discharge pipe 701 at the bottom of the guide frame 7 for direct use by the power plant boiler. Larger coal lumps cannot pass through the screen and eventually fall between the left crushing roller 8 and the right crushing roller 15 inside the shell 2. At this time, the third drive component 14 and the second drive component 9 are activated. The third drive component 14 drives the left crushing roller 8 to rotate, and the second drive component 9 drives the right crushing roller 15 to rotate. The two work together to crush larger coal lumps. If it is necessary to adjust the particle size of the crushed coal lumps, the first drive component 4, the second drive component 9 and the third drive component 14 include, but are not limited to, motors, and the push component 11 includes, but is not limited to, electric push rods.

[0025] In one embodiment of this utility model, a third driving member 14 is fixedly connected to the bottom end of the surface of the housing 2, the output end of the third driving member 14 is fixedly connected to the left crushing roller 8, a collar 5 is movably installed on the periphery of the connecting ring 3, and a feed hopper 1 is fixedly connected to the top of the collar 5.

[0026] The third driving component 14 is fixed to the bottom of the housing 2, and its output end is connected to the left crushing roller 8, providing power to the left crushing roller 8 and driving it to rotate to achieve the crushing function. The collar 5, which is movably installed around the connecting ring 3, ensures that the position of the top feed hopper 1 remains stable during the rotation of the connecting ring 3, ensuring that the raw coal can stably enter the device and avoiding problems such as material spillage during the feeding process.

[0027] In one embodiment of the present invention, a guide frame 7 is fixedly connected inside the shell 2 at the bottom of the coarse screening cylinder 13, and a discharge pipe 701 is fixedly connected to the bottom of the guide frame 7.

[0028] Inside the shell 2 at the bottom of the coarse screening cylinder 13, a guide frame 7 is fixed. Its function is to guide and collect the material after screening by the coarse screening cylinder 13, so that the material can be concentrated into the discharge pipe 701 connected to the bottom of the guide frame 7, and then transported to the subsequent processing stage through the discharge pipe 701, thereby improving the efficiency and stability of material conveying and preventing the material from accumulating inside the shell 2.

[0029] In one embodiment of the present invention, the top of the coarse screening cylinder 13 and the fine screening cylinder 12 are provided with bolt holes 16, and the fixing bolt 301 is threadedly connected to the bolt holes 16. The two sides of the bottom of the housing 2 are fixedly connected with connecting brackets 201.

[0030] The threaded connection facilitates the disassembly and installation between the coarse screening cylinder 13 and the connecting ring 3, and between the coarse screening cylinder 13 and the fine screening cylinder 12. It also allows for the replacement of screening cylinders of different specifications according to actual needs, in order to adapt to different screening requirements. The connecting brackets 201 on both sides of the bottom of the housing 2 are used to stably support and fix the entire device, ensuring the stability of the device during operation.

[0031] In one embodiment of the present invention, a support roller 6 is installed at the bottom of the housing 2, and the support roller 6 is fitted with the connecting ring 3.

[0032] The support roller 6 supports the connecting ring 3, reducing the shaking of the connecting ring 3 when it rotates under the drive of the first drive component 4, ensuring the stability of the rotation of the connecting ring 3 and the coarse screening cylinder 13 and fine screening cylinder 12 connected to it, and improving the screening effect.

[0033] In one embodiment of the present invention, a maintenance door 202 is movably installed on the top of the surface of the housing 2, and a handle is fixedly connected to the surface of the maintenance door 202.

[0034] Operators can open the maintenance door 202 by holding the handle, which makes it easy to operate the left crushing roller 8, right crushing roller 15, coarse screening cylinder 13, fine screening cylinder 12 and other components inside the housing 2, improving the convenience of device maintenance.

[0035] Working principle: In use, first, according to the specific requirements of the power plant boiler for the particle size of raw coal, select the coarse screening cylinder 13 and the fine screening cylinder 12 with corresponding size and screen density. The coarse screening cylinder 13 is positioned using the connecting ring 3, and the other side is connected to the fine screening cylinder 12. Then, the fixing bolts 301 are used to tighten the connection, achieving rapid assembly of the screening components. After the raw coal is introduced into the device through the feeding structure, it enters the cavities of the coarse screening cylinder 13 and the fine screening cylinder 12. At this time, the first drive component 4 is activated, driving the entire screening assembly to rotate through the connecting ring 3. The raw coal is graded and screened using coarse and fine screens. Fine raw coal particles that meet the particle size standard pass through the screens and fall into the lower guide frame 7, and are finally discharged through the discharge channel to be directly supplied to the boiler. Larger coal lumps that do not pass through the screens continue to fall under the action of gravity and enter the subsequent crushing stage. When it is necessary to adjust the screening specifications, simply unscrew the fixing bolt 301 to disassemble and replace the screening cylinder with different parameters to adapt to diverse screening needs. The larger coal lumps produced after screening fall into the crushing area between the left crushing roller 8 and the right crushing roller 15. The second drive component 9 and the corresponding power device driving the left crushing roller 8 are activated, causing the two crushing rollers to rotate in opposite directions, forming a shearing and squeezing action on the coal lumps to complete the crushing operation.

[0036] Example 2: This example is basically the same as the previous example, except that a pusher 11 is fixedly connected to one side of the housing 2, and a support frame 10 is fixedly connected to one side of the pusher 11.

[0037] Operators can send commands to the pusher 11 via external control equipment to push or pull the support frame 10. The support frame 10 then moves the right crushing roller 15 left and right, thereby adjusting the distance between the left crushing roller 8 and the right crushing roller 15 to meet different crushing particle size requirements. When it is necessary to change the screening specifications later, simply unscrew the fixing bolt 301 to quickly disassemble the coarse screening cylinder 13 and the fine screening cylinder 12 and replace them with screening components of other specifications. The operation is convenient and efficient.

[0038] Working Principle: When it is necessary to change the particle size of the crushed coal, the pusher 11 can be operated through the external control system. The pusher 11 drives the support frame 10 and the right crushing roller 15 to move as a whole, thereby adjusting the gap between the left crushing roller 8 and the right crushing roller 15. When the gap increases, the particle size of the crushed coal increases accordingly; when the gap decreases, the particle size of the coal decreases accordingly, thus meeting the adaptation requirements of different boilers for coal particle size. The entire crushing process achieves precise crushing of coal blocks through the coordinated action of the power unit and the gap adjustment mechanism, ensuring that the crushed products meet the feed standards of the power plant boiler.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A crushing and screening linkage device adapted for raw coal in coal mines and boilers in power plants, characterized in that: It includes a housing (2), a connecting ring (3), and a left crushing roller (8); A first driving member (4) is fixedly connected to one side of the inside of the housing (2). A connecting ring (3) is fixedly connected to the output end of the first driving member (4). A coarse screening cylinder (13) is movably installed on one side of the connecting ring (3). A fine screening cylinder (12) is movably installed on one side of the coarse screening cylinder (13). Fixing bolts (301) are movably installed on the top of both the connecting ring (3) and the fine screening cylinder (12). A left crushing roller (8) is movably installed on one side inside the housing (2). A pusher (11) is fixedly connected to one side of the housing (2). A support frame (10) is fixedly connected to one side of the pusher (11). A right crushing roller (15) is movably installed on the inner side of the support frame (10). A second drive (9) is fixedly connected to one end of the support frame (10). The output end of the second drive (9) is fixedly connected to the right crushing roller (15).

2. The crushing and screening linkage device adapted for raw coal in coal mines and power plant boilers according to claim 1, characterized in that: A third drive unit (14) is fixedly connected to the bottom end of the surface of the housing (2). The output end of the third drive unit (14) is fixedly connected to the left crushing roller (8). A collar (5) is movably installed on the periphery of the connecting ring (3). A feed hopper (1) is fixedly connected to the top of the collar (5).

3. The crushing and screening linkage device adapted for raw coal in coal mines and power plant boilers according to claim 1, characterized in that: A guide frame (7) is fixedly connected inside the shell (2) at the bottom of the coarse screening cylinder (13), and a discharge pipe (701) is fixedly connected to the bottom of the guide frame (7).

4. The crushing and screening linkage device adapted for raw coal in coal mines and power plant boilers according to claim 1, characterized in that: The top of the coarse screening cylinder (13) and the fine screening cylinder (12) are provided with bolt holes (16), and the fixing bolt (301) is threadedly connected to the bolt holes (16). The bottom sides of the housing (2) are fixedly connected with connecting brackets (201).

5. The crushing and screening linkage device adapted for raw coal in coal mines and power plant boilers according to claim 1, characterized in that: A support roller (6) is installed at the bottom inside the housing (2), and the support roller (6) is fitted with the connecting ring (3).

6. The crushing and screening linkage device adapted for raw coal in coal mines and power plant boilers according to claim 1, characterized in that: A maintenance door (202) is movably installed on the top of the surface of the housing (2), and a handle is fixedly connected to the surface of the maintenance door (202).

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