Impeller device convenient to install

Abstract

The utility model relates to the technical field of coal mills, in particular to an impeller device convenient to install, which comprises an impeller device and a coal mill shell, the impeller device is movably installed in the coal mill shell, the coal falling barrel is installed in the coal mill shell, the impeller device is located between the coal mill shell and the coal falling barrel, and through holes are symmetrically formed in the left end and the right end of the impeller device, the left end and the right end of the coal mill shell and the left end and the right end of the coal falling barrel. The impeller device is inserted into the multiple clamping grooves in the coal mill shell and the coal falling barrel through the multiple clamping blocks, then the multiple protruding blocks are inserted into the multiple through holes, the multiple bolts are inserted into the multiple threaded grooves, and when the multiple bolts are inserted into the multiple threaded grooves, the multiple bolts extrude and push out the multiple limiting blocks; the multiple sets of limiting blocks are stressed to be inserted into the multiple sets of limiting grooves, so that the impeller device can be fixed between the coal mill shell and the coal falling barrel, and the impeller device is convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to an impeller device which is easy to install. Background Art

[0002] Medium-speed coal mills are currently mainly used in the pulverizing system of thermal power plants. The main working principle is as follows: the raw coal falls into the grinding bowl of the coal mill through the coal drop pipe, and the three grinding rollers on the grinding bowl passively rotate to grind the raw coal. The ground coal powder is tangentially thrown out from the grinding disc and blown into the separator by the primary air through the impeller device. Qualified coal powder is taken out of the separator by the primary fan and sent to the burner through the coal mill outlet powder pipe. Unqualified coal powder falls into the grinding bowl for re-grinding, while heavy, difficult-to-grind coal gangue and other debris pass through the impeller device through the air flow and fall into the stone coal chamber and are discharged through the slag discharge port. The existing impeller device is generally fixed in the coal mill by multiple sets of bolts to ensure that the impeller device is firmly installed in the coal mill, which makes the installation and disassembly of the impeller device more cumbersome, and the installation and disassembly method is not convenient enough. In addition, the coal mill vibrates during long-term operation, which causes the fixing bolts to loosen, resulting in the separation of the impeller device and the coal mill. For this reason, we propose an impeller device that is easy to install to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide an impeller device that is easy to install, so as to solve the problem proposed in the above background technology that the existing impeller device is generally fixed in the coal mill by multiple sets of bolts to ensure that the impeller device is firmly installed in the coal mill, which makes the installation and disassembly of the impeller device more cumbersome and the installation and disassembly method is not convenient enough.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an impeller device that is easy to install, comprising an impeller device and a coal mill casing;

[0005] The impeller device is movably installed in the coal mill casing, and a coal dropping barrel is installed in the coal mill casing. The impeller device is located between the coal mill casing and the coal dropping barrel. Through holes are symmetrically opened on the left and right ends of the impeller device, the coal mill casing and the coal dropping barrel. The through holes on the left and right ends of the impeller device are aligned with the through hole openings on the left and right ends of the coal mill casing and the coal dropping barrel. Multiple groups of through holes are movably inserted in the fastening components. The fastening components include multiple groups of protrusions. Multiple groups of protrusions are movably inserted in multiple groups of through holes. Grooves are opened on multiple groups of protrusions. Thread grooves are opened in multiple groups of protrusions, the coal mill casing and the coal dropping barrel. Active grooves are opened in multiple groups of protrusions. Multiple groups of springs are installed in multiple groups of active grooves. Limit blocks are symmetrically installed in multiple groups of active grooves. Two groups of limit grooves are opened on the through holes in the coal mill casing and the coal dropping barrel. Multiple groups of limit blocks are inserted in multiple groups of limit grooves. Bolts are inserted in multiple groups of thread grooves.

[0006] Preferably, a plurality of groups of slots are provided on the inner wall of the coal mill housing and the outer wall of the coal drop chute, and a plurality of groups of blocks are provided on the outer wall and the inner wall of the impeller device, and the plurality of groups of blocks are movably inserted in the plurality of groups of slots.

[0007] Preferably, the multiple groups of inner walls of the card slots and the multiple groups of card blocks are all T-shaped, and the multiple groups of card blocks are adapted to the multiple groups of inner walls of the card slots.

[0008] Preferably, the diameter of the plurality of groups of protrusions in the through hole is smaller than the diameter of one end outside the through hole.

[0009] Preferably, one end of the multiple groups of bolts inserted in the thread groove is tapered, and the multiple groups of bolts fit with the opposite side of the multiple groups of limit blocks.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model inserts the impeller device into the multiple sets of card slots on the coal mill casing and the coal drop tube through multiple sets of card blocks, and then inserts the multiple sets of protrusions into the multiple sets of through holes, and inserts the multiple sets of bolts into the multiple sets of threaded grooves. When the multiple sets of bolts are inserted into the multiple sets of threaded grooves, the multiple sets of bolts squeeze and push out the multiple sets of limit blocks, and the multiple sets of limit blocks are forced to be inserted into the multiple sets of limit slots, so that the impeller device can be fixed between the coal mill casing and the coal drop tube, which is convenient for the installation and disassembly of the impeller device. When the coal mill device vibrates due to long-term operation and causes the multiple sets of bolts to loosen, the multiple sets of bolts will not slide out from between the multiple sets of limit blocks, thereby ensuring the fastening effect of the impeller device fixed to the coal mill casing and the coal drop tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a left-side cross-sectional schematic diagram of the structure of the utility model;

[0014] Figure 3 It is a schematic diagram of a front cross-section of the structure of the utility model;

[0015] Figure 4 For this utility model Figure 2 A is a partial enlarged schematic diagram;

[0016] Figure 5 For this utility model Figure 3A partial enlarged schematic diagram of B in the figure.

[0017] In the figure: 1. impeller device; 2. coal mill casing; 3. coal drop tube; 4. slot; 5. block; 6. through hole; 7. protrusion; 8. groove; 9. threaded groove; 10. movable groove; 11. spring; 12. limit block; 13. limit groove; 14. bolt. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 , the utility model provides an embodiment: an impeller device that is easy to install, including an impeller device 1 and a coal mill housing 2;

[0020] The impeller device 1 is movably installed in the coal mill housing 2, and a coal drop tube 3 is installed in the coal mill housing 2. The impeller device 1 is located between the coal mill housing 2 and the coal drop tube 3. Through holes 6 are symmetrically opened at the left and right ends of the impeller device 1, the coal mill housing 2 and the coal drop tube 3. The through holes 6 at the left and right ends of the impeller device 1 are aligned with the openings of the through holes 6 at the left and right ends of the coal mill housing 2 and the coal drop tube 3. A plurality of groups of through holes 6 are movably inserted in the fastening components. The fastening components include a plurality of groups of protrusions 7. The plurality of groups of protrusions 7 are movably inserted in the plurality of groups of through holes 6. Grooves 8 are opened on the plurality of groups of protrusions 7. Thread grooves 9 are opened in the plurality of groups of protrusions 7, the coal mill housing 2 and the coal drop tube 3. A movable groove 10 is opened in the plurality of groups of protrusions 7. A plurality of groups of springs 11 are installed in the plurality of groups of movable grooves 10. The limiting blocks 12 are symmetrically installed on the left and right sides of the impeller 1, and two groups of limiting grooves 13 are provided on the through holes 6 in the coal mill housing 2 and the coal drop shaft 3. Multiple groups of limiting blocks 12 are inserted into the multiple groups of limiting grooves 13, and bolts 14 are inserted into the multiple groups of threaded grooves 9. The device aligns the through holes 6 on the impeller device 1 with the through holes 6 on the coal mill housing 2 and the coal drop shaft 3, and then inserts multiple groups of protrusions 7 into the multiple groups of through holes 6, and inserts multiple groups of bolts 14 into the multiple groups of threaded grooves 9. The multiple groups of bolts 14 squeeze the multiple groups of limiting blocks 12 and insert them into the multiple groups of limiting grooves 13, so that the impeller device 1 can be tightened roughly between the coal mill housing 2 and the coal drop shaft 3 to prevent the impeller device 1 from loosening due to the vibration of the device during operation, thereby fixing the impeller device 1 between the coal mill housing 2 and the coal drop shaft 3;

[0021] Furthermore, multiple groups of slots 4 are provided on the inner wall of the coal mill casing 2 and the outer wall of the coal drop shaft 3, and multiple groups of blocks 5 are provided on the outer wall and the inner wall of the impeller device 1. The multiple groups of blocks 5 are movably inserted into the multiple groups of slots 4. This structure inserts the multiple groups of blocks 5 on the impeller device 1 into the multiple groups of slots 4 on the coal mill casing 2 and the coal drop shaft 3, which facilitates the alignment of the through holes 6 on the impeller device 1 with the through hole 6 openings on the coal mill casing 2 and the coal drop shaft 3.

[0022] Furthermore, the inner walls of the multiple groups of slots 4 and the multiple groups of blocks 5 are both T-shaped, and the multiple groups of blocks 5 are adapted to the inner walls of the multiple groups of slots 4. This structure is based on the shapes of the inner walls of the multiple groups of slots 4 and the multiple groups of blocks 5, so that after the multiple groups of blocks 5 are inserted into the multiple groups of slots 4, it is convenient to fasten the inner and outer walls at the center of the impeller device 1 to the coal mill casing 2 and the coal drop chute 3.

[0023] Furthermore, the diameter of the multiple groups of protrusions 7 in the through hole 6 is smaller than the diameter of one end outside the through hole 6. This structure prevents the multiple groups of protrusions 7 from being completely inserted into the multiple groups of through holes 6 after the multiple groups of protrusions 7 are inserted into the through hole 6 according to the size of the diameters at both ends of the multiple groups of protrusions 7, and can protect the end of the bolt 14 through the groove 8 on the protrusion 7.

[0024] Furthermore, one end of the multiple sets of bolts 14 inserted in the thread groove 9 is conical, and the multiple sets of bolts 14 are in contact with the opposite side of the multiple sets of limit blocks 12. This structure allows the multiple sets of bolts 14 inserted in the multiple sets of thread grooves 9 to pass through the multiple sets of limit blocks 12 according to the shape of one end of the multiple sets of bolts 14 inserted in the multiple sets of thread grooves 9, and the multiple sets of limit blocks 12 are squeezed open by the multiple sets of bolts 14.

[0025] Working principle: When installing the impeller device 1, Figure 2 and Figure 4 As shown, the impeller device 1 is inserted between the coal mill housing 2 and the coal drop shaft 3, and the multiple groups of blocks 5 on the inner and outer walls of the impeller device 1 are inserted into the multiple groups of slots 4 on the inner wall of the coal mill housing 2 and the outer wall of the coal drop shaft 3. After the multiple groups of blocks 5 are inserted into the multiple groups of slots 4, the multiple groups of through holes 6 on the impeller device 1 are aligned with the multiple groups of through holes 6 on the coal mill housing 2 and the coal drop shaft 3, as shown in FIG. Figure 3 and Figure 5 As shown, multiple groups of protrusions 7 are inserted into multiple groups of through holes 6, and then multiple groups of bolts 14 are inserted into multiple groups of threaded grooves 9 in multiple groups of protrusions 7. When multiple groups of bolts 14 are inserted into multiple groups of threaded grooves 9, multiple groups of bolts 14 squeeze multiple groups of limit blocks 12 in multiple groups of movable grooves 10 to slide out, and multiple groups of limit blocks 12 are squeezed and inserted into multiple groups of limit grooves 13. After multiple groups of bolts 14 squeeze and open multiple groups of limit blocks 12, multiple groups of bolts 14 continue to rotate and are inserted into the threaded grooves 9 on the coal mill housing 2 and the coal drop chute 3, so that the impeller device 1 can be tightened roughly in the coal mill housing 2 and the coal drop chute 3. The above is the entire working principle of the utility model.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An impeller device that is easy to install, comprising an impeller device (1) and a coal mill casing (2); characterized in that: The impeller device (1) is movably installed in the coal mill housing (2), a coal drop barrel (3) is installed in the coal mill housing (2), and the impeller device (1) is located between the coal mill housing (2) and the coal drop barrel (3). Through holes (6) are symmetrically opened at the left and right ends of the impeller device (1), the coal mill housing (2) and the coal drop barrel (3). The through holes (6) at the left and right ends of the impeller device (1) are aligned with the openings of the through holes (6) at the left and right ends of the coal mill housing (2) and the coal drop barrel (3). A plurality of groups of the through holes (6) are movably inserted into a fastening assembly. The fastening assembly includes a plurality of groups of protrusions (7). The plurality of groups of the protrusions (7) are movably inserted into the plurality of groups of through holes. (6), grooves (8) are formed on the plurality of groups of protrusions (7), thread grooves (9) are formed in the plurality of groups of protrusions (7), the coal mill housing (2) and the coal drop shaft (3), movable grooves (10) are formed in the plurality of groups of protrusions (7), a plurality of groups of springs (11) are installed in the plurality of groups of movable grooves (10), and limit blocks (12) are symmetrically installed in the plurality of groups of movable grooves (10), two groups of limit grooves (13) are formed on the through holes (6) in the coal mill housing (2) and the coal drop shaft (3), a plurality of groups of limit blocks (12) are inserted in the plurality of groups of limit grooves (13), and bolts (14) are inserted in the plurality of groups of thread grooves (9).

2. An impeller device that is easy to install according to claim 1, characterized in that: A plurality of groups of slots (4) are provided on the inner wall of the coal mill housing (2) and the outer wall of the coal drop tube (3), and a plurality of groups of blocks (5) are provided on the outer wall and the inner wall of the impeller device (1), and the plurality of groups of blocks (5) are movably inserted in the plurality of groups of slots (4).

3. An impeller device that is easy to install according to claim 2, characterized in that: The inner walls of the multiple groups of card slots (4) and the multiple groups of card blocks (5) are all T-shaped, and the multiple groups of card blocks (5) are compatible with the inner walls of the multiple groups of card slots (4).

4. An impeller device that is easy to install according to claim 1, characterized in that: The diameter of the plurality of groups of protrusions (7) located inside the through hole (6) is smaller than the diameter of one end located outside the through hole (6).

5. The impeller device that is easy to install according to claim 1, characterized in that: One end of the plurality of groups of bolts (14) inserted in the thread groove (9) is tapered, and the plurality of groups of bolts (14) fits against the opposite side of the eight groups of limit blocks (12).

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