Wear-resistant grinding roller of coal mill

Abstract

The invention relates to the technical field of coal mills, in particular to an anti-abrasion grinding roller of a coal mill, comprising a mounting unit which comprises two mounting discs and a mounting column arranged between the two mounting discs; the grinding unit comprises a plurality of connecting assemblies arranged on the mounting column, rolling assemblies arranged at the ends of the connecting assemblies, and springs arranged between the mounting column and the rolling assemblies; the rolling assembly comprises a rolling part arranged at the end of the connecting assembly and a sliding hammer arranged on the connecting assembly in a sliding mode, and the sliding hammer is matched with the rolling part in an impact mode. According to the abrasion-resistant grinding roller of the coal mill, the multiple grinding parts are spliced into the circular ring shape, the abrasion-resistant grinding roller can rotate circumferentially to be matched with a grinding disc for grinding, the single grinding part can compress a spring to move, the grinding parts can be jacked up when the grinding roller makes contact with stones, the situation of hard extrusion with the stones is avoided, and therefore the grinding parts are protected, and the service life of the grinding roller is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of coal mills, and more particularly to an anti-wear grinding roller for coal mills. Background Technology

[0002] The grinding roller is one of the core components of a coal mill. Its main function is to crush coal blocks and grind them into coal powder. Through crushing, impacting and grinding, the coal particles are gradually reduced in size under the interaction of the grinding disc and the grinding roller, eventually achieving the required fineness of coal powder. Currently, coal contains stones, which are harder than coal blocks and are not easy to crush. The existing grinding rollers are in a fixed position and directly crush the stones. The hard contact and crushing between the two will accelerate the rapid wear of the grinding rollers. Summary of the Invention

[0003] In view of the problems existing in the wear-resistant grinding rollers of the coal mill, the present invention is proposed.

[0004] Therefore, the purpose of this invention is to provide an anti-wear grinding roller for a coal mill, which aims to slow down the wear time of the grinding roller and improve its service life.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wear-resistant grinding roller for a coal mill, comprising,

[0006] The mounting unit includes two mounting disks and a mounting post disposed between the two mounting disks; and,

[0007] The grinding unit includes a plurality of connecting components disposed on the mounting post, a rolling component disposed at the end of the connecting components, and a spring disposed between the mounting post and the rolling component;

[0008] The compaction assembly includes a compaction section disposed at the end of the connecting assembly, and a sliding hammer slidably disposed on the connecting assembly, wherein the sliding hammer engages with the compaction section in an impact-cooperation manner.

[0009] The multiple rolling sections are joined end to end to form a ring.

[0010] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, the rolling section includes an arc-shaped mounting plate and a rolling plate disposed on the outer surface of the mounting plate;

[0011] The inner side of the mounting plate is connected to the connecting assembly, and the sliding hammer engages with the inner side of the mounting plate in an impact-cooperation manner.

[0012] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, a rubber layer is provided between each two adjacent mounting plates;

[0013] The rubber layer is connected to the two mounting plates on both sides respectively;

[0014] Magnetic strips are provided inside both ends of the rubber layer;

[0015] The two magnetic strips are respectively magnetically connected to the two mounting plates;

[0016] The side of the mounting plate is sealed to the two mounting discs.

[0017] As a preferred embodiment of the wear-resistant grinding roller of the coal mill according to the present invention, the connecting assembly includes a fixed column disposed on the mounting column and a sliding column slidably disposed inside the fixed column;

[0018] The sliding column is connected to the rolling section;

[0019] The sliding hammer is slidably mounted on the fixed column.

[0020] As a preferred embodiment of the wear-resistant grinding roller of the coal mill according to the present invention, it further includes a control component disposed in the fixed column, the control component cooperating with the sliding hammer;

[0021] The control component includes a mounting groove disposed on the fixed column, an expansion layer disposed in the mounting groove, and an air intake communicating with the mounting groove;

[0022] The expansion layer cooperates with the sliding hammer.

[0023] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, the fixed column is provided with an air injection groove inside, and the end of the sliding column is sealed to the air injection groove;

[0024] The air intake includes a connecting cavity disposed inside the mounting column, and a connecting pipe disposed between the mounting groove and the connecting cavity;

[0025] The connecting cavity communicates with the ends of the plurality of air injection slots.

[0026] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, the air injection groove includes a limiting end and an air injection end, wherein the cross-sectional area of ​​the air injection end is larger than that of the limiting end;

[0027] The fixed column and the mounting column are integrally connected, and the gas injection end is located inside the mounting column;

[0028] The gas injection end communicates with the connecting cavity;

[0029] The end of the sliding column is sealed to the inner wall of the gas injection end.

[0030] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, the sliding column is sealed to the air injection groove;

[0031] The mounting groove is connected to the air injection groove;

[0032] A closed space is formed between the expansion layer, the mounting groove, and the sliding column;

[0033] The connecting pipe is connected to the enclosed space.

[0034] As a preferred embodiment of the wear-resistant grinding roller of the coal mill of the present invention, the mounting plate is provided with a magnetic layer on the outside, and the rolling plate is inserted into the mounting plate through a limiting post and magnetically connected to the rolling plate through the magnetic layer.

[0035] As a preferred embodiment of the wear-resistant grinding roller of the coal mill described in this invention, the surface of the rolling plate is provided with multiple protrusions.

[0036] The beneficial effects of this invention are as follows: By splicing multiple rolling parts into a circular shape, it can rotate circumferentially and cooperate with the grinding disc to roll. Each rolling part can compress a spring to move, and when it comes into contact with the stone, it can lift the rolling part, so that it will not be squeezed hard with the stone, thereby protecting the rolling part and increasing its service life. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of an anti-wear grinding roller for a coal mill is shown.

[0039] Figure 2 A cross-sectional schematic diagram of an anti-wear grinding roller for a coal mill is shown;

[0040] Figure 3 It shows Figure 2 Enlarged view of region A in the middle;

[0041] Figure 4 A schematic diagram of a control assembly for an anti-wear grinding roller in a coal mill is shown.

[0042] Figure 5 It shows Figure 4 Enlarged view of region B in the middle. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0044] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0045] Example 1, referring to Figure 1 and Figure 2 The first embodiment of the present invention provides a wear-resistant grinding roller for a coal mill, which includes an installation unit 100 and a grinding unit 200.

[0046] The mounting unit 100 includes two mounting discs 101 and a mounting post 102 disposed between the two mounting discs 101. One of the mounting discs 101 is fixedly connected to the drive shaft, and the drive shaft and the mounting disc 101 are driven to rotate by an external drive device.

[0047] The grinding unit 200 includes a plurality of connecting components 201 disposed on the mounting post 102, a rolling component 202 disposed at the end of the connecting component 201, and a spring 203 disposed between the mounting post 102 and the rolling component 202.

[0048] The compaction assembly 202 includes a compaction part 202a disposed at the end of the connecting assembly 201, and a sliding hammer 202b slidably disposed on the connecting assembly 201. The sliding hammer 202b impacts and cooperates with the compaction part 202a. Multiple compaction parts 202a are spliced ​​together to form a ring shape. The connecting assembly 201 is made of a long rod slidably disposed in the mounting column 102.

[0049] When the mounting plate 101 rotates as the peripheral drive device operates, it can drive multiple grinding sections 202a to rotate via the mounting column 102 and the connecting assembly 201. The grinding sections 202a cooperate with the grinding disc to grind the coal. When stones and metal blocks mixed in the coal come into contact with the grinding sections 202a, the grinding sections 202a have difficulty grinding them. At this time, the grinding sections 202a will compress the spring 203, allowing the stones and metal blocks to pass between the grinding sections 202a and the grinding disc. Through long-term grinding, the stones and metal blocks are reduced in size, avoiding hard contact between the grinding sections 202a and them, thereby reducing the wear rate of the grinding sections 202a.

[0050] The sliding hammer 202b is slidably disposed on the connecting assembly 201. When it rotates with the mounting column 102, taking one of the crushing parts 202a as an example, when the crushing part 202a moves to the bottom, the sliding hammer 202b is located on one side of the crushing part 202a due to gravity. As the crushing part 202a rotates, the sliding hammer 202b will slide along the connecting assembly 201 and approach the side of the mounting column 102. When the sliding hammer 202b moves from the side of the crushing part 202a to the side of the mounting column 102, it will generate acceleration. When it reaches the mounting column 102 and contacts it, it will impact, so that the crushing part 202a at the bottom at this time forms a downward impact force, increasing its ability to crush and grind coal blocks.

[0051] Furthermore, the compaction section 202a includes an arc-shaped mounting plate 202a-1 and a compaction plate 202a-2 disposed on the outer surface of the mounting plate 202a-1; the compaction plate 202a-2 and the mounting plate 202a-1 are connected by bolts, the bolts pass through the inner side of the mounting plate 202a-1 and are fixed to the compaction plate 202a-2, the inner side of the mounting plate 202a-1 is connected to the connecting assembly 201, and the sliding hammer 202b impacts and engages with the inner side of the mounting plate 202a-1. The compaction plate 202a-2 can be quickly disassembled by fixing it with bolts, and can be quickly disassembled and replaced when the surface of the compaction plate 202a-2 is severely worn.

[0052] Alternatively, the mounting plate 202a-1 may have a magnetic layer on its outer side, and the rolling plate 202a-2 may be inserted into the mounting plate 202a-1 through a limiting post. The rolling plate 202a-2 may be magnetically connected to the mounting plate 202a-1 through the magnetic layer. This magnetic connection allows for faster installation of the rolling plate 202a-2 and the mounting plate 202a-1.

[0053] The surface of the further grinding plate 202a-2 is provided with multiple protrusions, which can be columnar or strip-shaped, and the grinding effect is increased by setting the protrusions.

[0054] The design of multiple rolling sections 202a ensures that when one rolling section 202a is lifted, it will not affect the rolling and grinding work of the next rolling section 202a. At the same time, when the rolling surface is severely worn, only the rolling plate 202a-2 of the severely worn part can be replaced, saving costs.

[0055] Example 2, refer to Figure 3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a rubber layer 202a-3 is provided between every two adjacent mounting plates 202a-1; the two sides of the rubber layer 202a-3 are respectively connected to the two mounting plates 202a-1.

[0056] By setting the rubber layer 202a-3, the gap between the two mounting plates 202a-1 can be sealed, preventing coal dust from entering the interior of the two mounting discs 101 through the gap and affecting the activity of the connecting assembly 201 and the sliding hammer 202b.

[0057] Furthermore, the rubber layer 202a-3 has magnetic strips 202a-4 inside both ends; the two magnetic strips 202a-4 are magnetically connected to the two mounting plates 101 respectively, so that the rubber layer 202a-3 and the mounting plate 101 are always in close contact, and when one of the mounting plates 202a-1 moves, the rubber layer 202a-3 will bend without forming a gap with the mounting plate 101.

[0058] Furthermore, the side of the mounting plate 202a-1 is sealed to the two mounting discs 101 to prevent coal ash from entering between the two mounting discs 101.

[0059] The remaining structure is the same as that in Example 1.

[0060] Example 3, referring to Figure 4 and Figure 5 This is the third embodiment of the present invention, which differs from the second embodiment in that: the connecting component 201 includes a fixed column 201a disposed on the mounting column 102, and a sliding column 201b slidably disposed inside the fixed column 201a; the sliding column 201b is connected to the rolling part 202a, and the sliding column 201b is fixedly connected to the mounting plate 202a-1 of the rolling part 202a, and the sliding hammer 202b is slidably disposed on the fixed column 201a.

[0061] It also includes a control component 204 disposed in the fixed column 201a, which cooperates with the sliding hammer 202b;

[0062] The control assembly 204 includes a mounting groove 204a disposed on a fixed post 201a, an expansion layer 204b disposed in the mounting groove 204a, and an air intake 204c communicating with the mounting groove 204a, wherein the expansion layer 204b is made of rubber.

[0063] The expansion layer 204b cooperates with the sliding hammer 202b. Through the air inlet 204c, the expansion layer 204b inside the mounting groove 204a can be controlled to expand and contact the inner side of the sliding hammer 202b, thereby preventing the sliding hammer 202b from sliding.

[0064] The air intake 204c can be made of a blower, a control chip and a position sensor. A position sensor is installed inside each mounting plate 202a-1. When the crushing plate 202a-2 is lifted by a stone, the position sensor sends a signal to the control chip to control the blower to inject air into the multiple mounting slots 204a, thereby preventing the sliding hammer 202b from moving and impacting.

[0065] When the rolling plate 202a-2 is lifted by the stone, the sliding hammer 202b is controlled to prevent impact, thus avoiding direct compression between the rolling plate 202a-2 and the stone, effectively protecting the rolling plate 202a-2. The rolling plate 202a-2 is protected by grinding the stone multiple times with small amounts of material.

[0066] The fixed column 201a has an air injection groove 201a-1 inside, and the end of the sliding column 201b is sealed to the air injection groove 201a-1.

[0067] Furthermore, such as Figure 5 As shown, the air intake 204c includes a connecting cavity 204c-1 disposed inside the mounting post 102, and a connecting pipe 204c-2 disposed between the mounting groove 204a and the connecting cavity 204c-1; the connecting cavity 204c-1 communicates with the ends of a plurality of air injection grooves 201a-1.

[0068] Furthermore, the gas injection groove 201a-1 includes a limiting end 201a-11 and a gas injection end 201a-12, the cross-sectional area of ​​the gas injection end 201a-12 being larger than that of the limiting end 201a-11; the fixed column 201a and the mounting column 102 are integrally arranged, the gas injection end 201a-12 is located inside the mounting column 102, the gas injection end 201a-12 is connected to the connecting cavity 204c-1, and the end of the sliding column 201b is sealed to the inner wall of the gas injection end 201a-12; by increasing the cross-sectional area of ​​the gas injection end 201a-12, the sliding column 201b can move a shorter distance to push more gas into the connecting cavity 204c-1, and finally enter the multiple mounting grooves 204a through multiple connecting pipes 204c-2 to push open and expand the expansion layer 204b, ensuring that the movement of multiple sliding hammers 202b is restricted.

[0069] The moving distance of the sliding column 201b before the expansion layer 204b is pushed open by the gas and contacts the sliding cone is the installation distance. At this time, the movement of the sliding hammer 202b is not restricted. At this time, the stones or coal blocks that lift the rolling plate 202a-2 are relatively small and can achieve impact, quickly achieve rolling without damaging the rolling plate 202a-2.

[0070] Alternatively, the sliding column 201b is sealed to the gas injection groove 201a-1; in this case, the mounting groove 204a can communicate with the gas injection groove 201a-1; a closed space is formed between the expansion layer 204b, the mounting groove 204a and the sliding column 201b; the connecting pipe 204c-2 communicates with the closed space, and when the gas enters the closed space, it can lift the expansion layer 204b.

[0071] The sliding column 201b and the air injection groove 201a-1 are sealed together, which can achieve an interference fit between the sliding column 201b and the air injection groove 201a-1, reduce the wobbling ability of the sliding column 201b, and share the squeezing force that the wobbling of the sliding column 201b should exert on the inner wall of the air injection end 201a-12, thereby protecting the air injection end 201a-12.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wear-resistant grinding roller for a coal mill, characterized in that: include, The mounting unit (100) includes two mounting disks (101) and a mounting post (102) disposed between the two mounting disks (101); as well as, The grinding unit (200) includes a plurality of connecting components (201) disposed on the mounting post (102), a rolling component (202) disposed at the end of the connecting components (201), and a spring (203) disposed between the mounting post (102) and the rolling component (202); The compaction assembly (202) includes a compaction part (202a) disposed at the end of the connecting assembly (201) and a sliding hammer (202b) slidably disposed on the connecting assembly (201), wherein the sliding hammer (202b) engages with the compaction part (202a) in an impact engagement. Multiple rolling sections (202a) are joined end to end to form a ring.

2. The wear-resistant grinding roller for a coal mill according to claim 1, characterized in that: The rolling section (202a) includes an arc-shaped mounting plate (202a-1) and a rolling plate (202a-2) disposed on the outer surface of the mounting plate (202a-1); The inner side of the mounting plate (202a-1) is connected to the connecting assembly (201), and the sliding hammer (202b) impacts the inner side of the mounting plate (202a-1).

3. The wear-resistant grinding roller for a coal mill according to claim 2, characterized in that: A rubber layer (202a-3) is provided between every two adjacent mounting plates (202a-1); The rubber layer (202a-3) is connected to the two mounting plates (202a-1) on both sides respectively; Magnetic strips (202a-4) are provided inside both ends of the rubber layer (202a-3); The two magnetic strips (202a-4) are magnetically connected to the two mounting plates (101) respectively; The mounting plate (202a-1) is sealed to the two mounting discs (101) on its side.

4. The wear-resistant grinding roller for a coal mill according to any one of claims 1-3, characterized in that: The connecting assembly (201) includes a fixed post (201a) disposed on the mounting post (102) and a sliding post (201b) slidably disposed inside the fixed post (201a); The sliding column (201b) is connected to the rolling section (202a); The sliding hammer (202b) is slidably mounted on the fixed column (201a).

5. The wear-resistant grinding roller for a coal mill according to claim 4, characterized in that: It also includes a control component (204) disposed in the fixed column (201a), the control component (204) cooperating with the sliding hammer (202b); The control component (204) includes a mounting groove (204a) disposed on the fixed post (201a), an expansion layer (204b) disposed in the mounting groove (204a), and an air intake (204c) communicating with the mounting groove (204a). The expansion layer (204b) cooperates with the sliding hammer (202b).

6. The wear-resistant grinding roller for a coal mill according to claim 5, characterized in that: The fixed column (201a) is provided with an air injection groove (201a-1) inside, and the end of the sliding column (201b) is sealed to the air injection groove (201a-1); The air intake (204c) includes a connecting cavity (204c-1) disposed inside the mounting post (102), and a connecting pipe (204c-2) disposed between the mounting groove (204a) and the connecting cavity (204c-1); The connecting cavity (204c-1) communicates with the ends of the plurality of gas injection slots (201a-1).

7. The wear-resistant grinding roller for a coal mill according to claim 6, characterized in that: The gas injection groove (201a-1) includes a limiting end (201a-11) and a gas injection end (201a-12), wherein the cross-sectional area of ​​the gas injection end (201a-12) is larger than that of the limiting end (201a-11); The fixed column (201a) and the mounting column (102) are integrally connected, and the gas injection end (201a-12) is located inside the mounting column (102); The gas injection end (201a-12) communicates with the connecting cavity (204c-1); The end of the sliding column (201b) is sealed to the inner wall of the gas injection end (201a-12).

8. The wear-resistant grinding roller for a coal mill according to claim 6 or 7, characterized in that: The sliding column (201b) is sealed to the air injection groove (201a-1); The mounting groove (204a) is connected to the air injection groove (201a-1); A closed space is formed between the expansion layer (204b), the mounting groove (204a), and the sliding column (201b); The connecting pipe (204c-2) is connected to the enclosed space.

9. The wear-resistant grinding roller for a coal mill according to claim 2 or 3, characterized in that: The mounting plate (202a-1) has a magnetic layer on its outer side. The rolling plate (202a-2) is inserted into the mounting plate (202a-1) through a limiting post and is magnetically connected to the rolling plate (202a-2) through the magnetic layer.

10. The wear-resistant grinding roller for a coal mill according to claim 9, characterized in that: The surface of the rolling plate (202a-2) is provided with multiple protrusions.

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