Lifting type pebble coal discharging system of medium-speed coal mill

Abstract

The utility model discloses a lifting type pebble coal discharging system of a medium-speed coal mill, and relates to the technical field of milling and crushing equipment medium-speed coal mills, the lifting type pebble coal discharging system comprises a slag discharging pipe and two lifting devices, a gate valve is arranged on the slag discharging pipe, and a box body is arranged at the discharging end of the slag discharging pipe; the two lifting devices are installed on the front side and the rear side of the box body correspondingly. The lifting device comprises a speed reducing motor arranged at the bottom of the box body, the driving end of the speed reducing motor is connected with the bottom end of a T-shaped screw, the top end of the T-shaped screw is rotationally arranged at the top end of the box body, a bracket capable of moving in the axial direction of the T-shaped screw is installed on the T-shaped screw, one end of the bracket extends into the box body, and the other end of the bracket extends into the box body. And the pebble coal bucket can be supported. The speed reducing motor drives the T-shaped screw rod to rotate, the bracket is connected with the T-shaped screw rod, and the T-shaped screw rod drives the bracket to ascend and descend, so that the pebble coal bucket ascends and descends along with the bracket.

Description

Technical Field

[0001] The utility model relates to the technical field of medium-speed coal mills for pulverizing and crushing equipment, in particular to a lifting type pebble coal discharge system for medium-speed coal mills. Background Art

[0002] Medium-speed coal mills used in coal-fired power plants, chemical plants or steel smelters grind raw coal into coal powder of a certain fineness, complete the coal powder drying process, and transport the coal powder to the boiler furnace, gasifier and blast furnace for combustion.

[0003] The medium-speed coal mill pebble coal slag discharge system is an indispensable auxiliary device in the production of thermal power plants. The coal mill is used to crush coal blocks and grind them into coal powder. Most coal blocks contain ores that cannot be burned and are difficult to crush, called pebble coal, which needs to be discharged separately.

[0004] The old sealed pebble coal discharge system was a downward pressure type, requiring space in the foundation for a weighing device. Two small cylinders were also required to operate the system, and the slag box needed to be transported by forklift. This resulted in poor overall applicability and inconvenience. This lifting pebble coal discharge system requires no opening in the foundation and is positioned above 0 meters. It can be transported manually without the need for a forklift.

[0005] Therefore, those skilled in the art provide a medium-speed coal mill lifting type pebble coal discharge system to solve the problems raised in the above background technology. Utility Model Content

[0006] The utility model provides a medium-speed coal mill lifting type pebble coal discharge system which overcomes the above-mentioned shortcomings in the operation of the existing coal mill.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] The utility model discloses a medium-speed coal mill lifting type pebble coal discharge system, comprising:

[0009] A slag discharge pipe, wherein a gate valve is provided on the slag discharge pipe, and a box is provided at the discharge end of the slag discharge pipe;

[0010] Two lifting devices, the two lifting devices are respectively installed on the front and rear sides of the box;

[0011] The lifting device includes a reduction motor arranged at the bottom of the box body, the driving end of the reduction motor is connected to the bottom end of the T-shaped screw, the top end of the T-shaped screw is rotatably arranged at the top end of the box body, and a bracket that can move along its axial direction is installed on the T-shaped screw. One end of the bracket extends into the box body and can support the stone coal hopper.

[0012] Furthermore, a sleeve is provided inside the bracket, and the sleeve is sleeved on the T-shaped screw and threadedly connected to the T-shaped screw.

[0013] Furthermore, the top end of the T-shaped screw is connected to the outer ball bearing, the square seat of the outer ball bearing is installed on the cover plate, and the cover plate is welded to the top end of the box body.

[0014] Furthermore, an oil cup is provided on the cover plate, and the oil cup is provided directly above the T-shaped screw.

[0015] Furthermore, a sight mirror with a brush is provided on the ground of the cover plate.

[0016] Furthermore, a driven gear is provided at the bottom of the T-shaped screw, and the driven gear is meshed and connected with the driving gear at the output end of the reduction motor.

[0017] Furthermore, the bottom end of the T-shaped screw is connected to a thrust ball bearing, and the thrust ball bearing is arranged on a first steel plate, and the first steel plate is welded to the box body.

[0018] Furthermore, the reduction motor is mounted on a support plate, which is welded to the box body; the box body is set on a second steel plate, which is fixed to the ground by expansion bolts.

[0019] Furthermore, the cover plate is provided with a feed port, the feed port is connected to the slag discharge pipe, and a level meter is provided on the cover plate near the feed port.

[0020] Furthermore, a spray pipe is provided on the cover plate, and a spray end of the spray pipe passes through the cover plate and extends into the box body.

[0021] In the above-mentioned technical solution, the utility model provides a lifting-type pebble coal discharge system for a medium-speed coal mill, which has the following beneficial effects: a T-screw is driven by a reduction motor, and a bracket is connected to the T-screw. The T-screw drives the bracket up and down, causing the pebble coal hopper to rise and fall accordingly. When the pebble coal hopper contacts the top of the box, a gate valve controls the discharge of pebble coal in the slag discharge pipe into the pebble coal hopper. The pebble coal hopper can be equipped with casters for manual pushing and pulling, making it highly adaptable and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1A schematic structural diagram of a medium-speed coal mill lifting type pebble coal discharge system provided by an embodiment of the utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the lifting device;

[0025] Figure 3 for Figure 2 side view.

[0026] Description of reference numerals:

[0027] 1. Slag discharge pipe; 2. Gate valve; 3. Box; 4. Lifting device; 5. Reducer motor; 6. T-screw; 7. Bracket; 8. Stone coal hopper; 9. Sleeve; 10. Outer ball bearing; 11. Cover plate; 12. Oil cup; 13. Sight glass with brush; 14. Driven gear; 15. Driving gear; 16. Thrust ball bearing; 17. First steel plate; 18. Support plate; 19. Second steel plate; 20. Expansion bolt; 21. Level meter; 22. Spray pipe. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1-3 As shown;

[0030] The embodiment of the present invention provides a medium-speed coal mill lifting type pebble coal discharge system, comprising:

[0031] A slag discharge pipe 1 is provided with a gate valve 2, and a box 3 is provided at the discharge end of the slag discharge pipe 1;

[0032] Two lifting devices 4, the two lifting devices 4 are respectively installed on the front and rear sides of the box body 3;

[0033] The lifting device 4 includes a reduction motor 5 arranged at the bottom of the box body 3, the driving end of the reduction motor 5 is connected to the bottom end of the T-shaped screw 6, the top end of the T-shaped screw 6 is rotatably arranged at the top end of the box body 3, and a bracket 7 that can move along its axial direction is installed on the T-shaped screw 6. One end of the bracket 7 extends into the box body 3 and can support the stone coal hopper 8.

[0034] During specific operation, the T-screw 6 is driven to rotate by the reduction motor 5, and the bracket 7 is connected to the T-screw 6. The T-screw 6 drives the bracket 7 to rise and fall, causing the gravel coal hopper 8 to rise and fall accordingly. Five double-row radial ball bearings 23 are installed on both sides of the box body 3 to ensure that the gravel coal hopper 8 moves between the double-row radial bearings when transporting coal slag waste without deviation, thereby controlling the direction of the gravel coal hopper; when the gravel coal hopper 8 contacts the top of the box body 3, the gate valve 2 controls the gravel coal in the slag discharge pipe 1 to be discharged into the gravel coal hopper 8. The gravel coal hopper 8 can be provided with casters and can be pushed and pulled manually. It has high applicability and is easy to use. A sealing groove is installed on the lower surface of the cover plate 11.

[0035] The sealing rope is put into the groove, and when the stone coal hopper 8 rises, it is sealed with the cover plate 11 by the sealing rope.

[0036] The bracket 7 is internally provided with a sleeve 9, which is sleeved onto and threadedly connected to the T-screw 6. The top end of the T-screw 6 is connected to an outer ball bearing 10, the square seat of which is mounted on a cover plate 11, which is welded to the top end of the housing 3. The bottom end of the T-screw 6 is connected to a thrust ball bearing 16, which is mounted on a first steel plate 17, which is welded to the housing 3.

[0037] An oil cup 12 is provided on the cover plate 11 . The oil cup 12 is provided just above the T-screw 6 and is used to lubricate bearings inside the control system.

[0038] A brushed sight glass 13 is provided on the floor of the cover plate 11 , which can be used to observe the internal working conditions. At the same time, the brushed sight glass 13 can be cleaned to avoid the influence of dust on the observation effect.

[0039] A driven gear 14 is provided at the bottom of the T-shaped screw 6 , and the driven gear 14 is meshed and connected with a driving gear 15 at the output end of the reduction motor 5 .

[0040] The reduction motor 5 is mounted on a support plate 18, which is welded to the housing 3. The housing 3 is mounted on a second steel plate 19, which is fixed to the ground via expansion bolts 20. No foundation is required to reserve space for the weighing device.

[0041] The cover plate 11 is provided with a feed port, which is communicated with the slag discharge pipe 1 . A level meter 21 is provided on the cover plate 11 near the feed port, and the slag discharge amount in the stone coal hopper 8 is controlled by the level meter 21 .

[0042] The cover plate 11 is provided with a spray pipe 22, the spray end of the spray pipe 22 passes through the cover plate 11 and extends into the box body 3. The spray pipe 22 sprays water into the pebble coal hopper 8 filled with pebble coal to prevent dust from leaking out and affecting the environment.

[0043] The entire pebble coal discharge process, from the pebble coal discharge port to the pebble coal collection box, is conducted in a strictly sealed state. The pebble coal process flow is as follows: through the coal mill pebble coal discharge interface, slag discharge pipe, slag discharge valve, pebble coal hopper, and external transportation. To ensure continuous, safe, and stable operation of the system, the pebble coal closed discharge device must meet the requirements of medium-speed mill pebble coal discharge: one set of pebble coal discharge system is installed for each coal mill. The pebble coal discharge system adopts a fully sealed isobaric discharge method with a pneumatic lifting seal and automatic material level detection. This application is placed directly on the 0-meter mark and fixed with expansion bolts 20. Two reduction motors 5 drive the T-screw 6 to rotate, which drives the bracket 7 to rise and fall, and the bracket 7 drives the pebble coal hopper 8 to rise and fall, meeting the requirements of the pebble coal discharge system. In addition, the pebble coal hopper 8 can be equipped with casters for manual pushing and pulling. It is highly applicable and easy to use.

[0044] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description 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 medium-speed coal mill lifting type pebble coal discharge system, characterized in that: include: A slag discharge pipe (1), wherein a gate valve (2) is provided on the slag discharge pipe (1), and a box (3) is provided at the discharge end of the slag discharge pipe (1); Two lifting devices (4), the two lifting devices (4) being respectively installed on the front and rear sides of the box body (3); The lifting device (4) includes a reduction motor (5) arranged at the bottom of the box body (3), the driving end of the reduction motor (5) is connected to the bottom end of the T-shaped screw (6), the top end of the T-shaped screw (6) is rotatably arranged at the top end of the box body (3), and a bracket (7) capable of moving along its axial direction is installed on the T-shaped screw (6), one end of the bracket (7) extends into the box body (3) and is capable of supporting the stone coal hopper (8); A sleeve (9) is provided inside the bracket (7), and the sleeve (9) is sleeved on the T-shaped screw (6) and threadedly connected to the T-shaped screw (6).

2. The medium-speed coal mill lifting type pebble coal discharge system according to claim 1, characterized in that: The top end of the T-shaped screw (6) is connected to the outer ball bearing (10), the square seat of the outer ball bearing (10) is mounted on the cover plate (11), and the cover plate (11) is welded to the top end of the box body (3).

3. The medium-speed coal mill lifting type pebble coal discharge system according to claim 2, characterized in that: An oil cup (12) is provided on the cover plate (11), and the oil cup (12) is arranged directly above the T-shaped screw (6).

4. The medium-speed coal mill lifting type pebble coal discharge system according to claim 2, characterized in that: A sight mirror (13) with a brush is provided on the bottom surface of the cover plate (11).

5. The medium-speed coal mill lifting type pebble coal discharge system according to claim 1, characterized in that: A driven gear (14) is provided at the bottom of the T-shaped screw (6), and the driven gear (14) is meshedly connected with the driving gear (15) at the output end of the reduction motor (5).

6. The medium-speed coal mill lifting type pebble coal discharge system according to claim 5, characterized in that: The bottom end of the T-shaped screw (6) is connected to a thrust ball bearing (16), and the thrust ball bearing (16) is arranged on a first steel plate (17), and the first steel plate (17) is welded to the box body (3).

7. The medium-speed coal mill lifting type pebble coal discharge system according to claim 1, characterized in that: The reduction motor (5) is mounted on a support plate (18), and the support plate (18) is welded to the box body (3); the box body (3) is arranged on a second steel plate (19), and the second steel plate (19) is fixed to the ground by expansion bolts (20).

8. The medium-speed coal mill lifting type pebble coal discharge system according to claim 2, characterized in that: The cover plate (11) is provided with a feed port, the feed port being in communication with the slag discharge pipe (1), and a material level meter (21) is provided on the cover plate (11) near the feed port.

9. The medium-speed coal mill lifting type pebble coal discharge system according to claim 2, characterized in that: A spray pipe (22) is provided on the cover plate (11), and a spray end of the spray pipe (22) passes through the cover plate (11) and extends into the box body (3).

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