CN213110716U - Silo center unloader - Google Patents

Abstract

The utility model relates to the field of unloading machines, in particular to a silo center unloading machine, which comprises a silo, wherein a supporting beam is arranged in the silo, a pressure reducing cone is erected at the central position of the supporting beam, at least one base is arranged at the bottom of the pressure reducing cone, a variable frequency motor is arranged on the base, a slewing bearing is arranged in front of the pressure reducing cone and the base, a slewing main shaft is fixed at the center of the slewing bearing, a fixed seat is arranged on the slewing main shaft, unloading arms are arranged on the fixed seat, each output shaft of the variable frequency motor penetrates through the base and is in transmission connection with a transmission gear, the outer ring of a movable ring of the slewing bearing is provided with teeth, the transmission gear is meshed with the teeth, a blanking pipe is arranged at the bottom of the base, the blanking pipe is communicated with the silo, a lubricating system is arranged outside the silo, the, the system lubrication is automatically realized, and the method is simple, convenient and reliable.

Description

Silo center unloader

Technical Field

The utility model relates to an unloader field specifically is to a silo center unloader.

Background

In a thermal power plant, coal is generally conveyed to a raw coal bin, a central unloader is additionally arranged at the bottom of the raw coal bin, and the coal can be output to a weighing type belt conveyor or directly fed into a boiler and the like by utilizing the continuous output of the power of the unloader. The smooth coal conveying is ensured.

The central unloading machine needs to maintain and lubricate the high-friction part in the same cabin at regular intervals, the existing lubrication mode is also completed by manual, electric and pneumatic grease injection equipment in a manual mode, and the mode obviously wastes time and labor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a silo center unloader is provided, this technical scheme has solved artifical to center unloader high friction position and has exploded the problem that oxygen lubrication wastes time and energy, and this center unloader independently arranges's lubricating system, and the automatic system that realizes is lubricated, simple and convenient and reliable.

In order to solve the technical problem, the utility model provides a following technical scheme:

the central unloading machine of the silo comprises the silo, a supporting beam is installed in the silo, a pressure reducing cone is erected at the central position of the supporting beam, the pressure reducing cone is of a hollow structure, the cross section area of the pressure reducing cone is gradually increased from top to bottom, at least one base is arranged at the bottom of the pressure reducing cone, a variable frequency motor is arranged on the base, a rotary support is arranged in front of the pressure reducing cone and the base, a fixed ring of the rotary support is fixedly connected with the base, a rotary shaft sleeve is connected with a movable ring of the rotary support, a rotary main shaft is fixed at the center of the rotary shaft sleeve, a fixed seat is arranged on the rotary main shaft, an unloading arm is arranged on the fixed seat, an output shaft of each variable frequency motor penetrates through the base and is in transmission connection with a transmission gear, teeth are arranged on the outer ring of the rotary support, the transmission gear is meshed, and the lubricating system is positioned at the bottom end of the silo, the lubricating system is arranged outside the silo and comprises a transfer oil supply device and a conveying pipeline, and the lubricating system is used for supplying lubricating grease to the slewing bearing and the transmission gear.

Optionally, a pipeline compensator is arranged between the blanking pipe and the silo.

Optionally, a rotary sealing element is sleeved on the outer ring of the rotary shaft sleeve.

Optionally, the outer wall of the pressure reduction cone and the inner wall of the silo are provided with protective linings.

Optionally, an oil filling port and an oil outlet are arranged at the bottom end of the transfer oil supply device, the lubricating grease is contained in the transfer oil supply device, and a pushing device which pushes the lubricating grease out from the oil outlet is arranged in the transfer oil supply device.

Optionally, the pushing device comprises a piston plate, a fixed disc, a driven gear, a mounting disc, a driving motor, a driving gear, a limiting sleeve, a guide groove and a limiting block, the fixed disc is fixed in the transit oil supply device, the top end of the fixed disc is rotationally connected with the driven gear, the fixed disc is provided with the mounting disc on an upper frame, the driving motor is arranged on the mounting disc, driving motor's output shaft runs through the mounting disc and the transmission is connected with the driving gear, driving gear and driven gear meshing, the top of mounting disc is equipped with spacing sleeve, spacing telescopic inside sliding connection have the promotion screw rod, and the one end that promotes the screw rod runs through the fixed disk and is connected with the piston plate promotes screw rod and driven gear threaded connection, and the other end threaded connection that promotes the screw rod has the stopper, and the guide way has been seted up to spacing sleeve, be equipped with on the stopper with guide way sliding fit's picture peg.

Optionally, the fixed disk is located on top of the oil filling opening.

Compared with the prior art, the utility model beneficial effect who has is:

the external drive structure is adopted, namely the variable frequency motor is arranged at the top of the base, so that the external drive structure is directly visible, the overhaul and maintenance are facilitated, the operation of the whole machine is reliable, the accident rate is low, the continuous and uniform coal feeding can be realized even under the special conditions of poor coal quality and high water content, the conveying speed is controlled by the variable frequency motor, the stepless speed-regulating quantitative conveying is realized, the requirement of actual use is met, the external drive structure is interlocked and jointly controlled with associated equipment, the perfect matching is realized, the discharging amount is randomly and steplessly regulated in the specified discharging range, the equipment is reliable in operation, reasonable in structure, and the overhaul and maintenance. The sealing and lubricating aspects are safe and reliable: multiple sealing measures are adopted, leakage is avoided, a lubricating system is independently arranged, system lubrication is automatically realized, and the device is simple, convenient and reliable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a schematic structural view of the intermediate transfer oil supply device of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic structural diagram of the pushing device of the present invention;

fig. 6 is a schematic structural view of the pushing device of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 6;

fig. 8 is a third schematic structural view of the pushing device of the present invention;

FIG. 9 is a schematic cross-sectional view taken at C-C of FIG. 8;

fig. 10 is an enlarged solid view at a in fig. 9.

The reference numbers in the figures are:

1-a silo;

2-a support beam;

3-a decompression cone;

4-a base;

5-a slewing bearing; 5 a-a rotary seal;

6-a discharge arm;

7-a variable frequency motor;

8-a transmission gear;

9-blanking pipe;

10-a pipe compensator;

11-a transit oil supply unit;

12-lubricating grease;

13-a pushing device; 13 a-a piston plate; 13 b-a stationary disc; 13 c-driven gear; 13 d-mounting the disc; 13 e-a drive motor; 13 f-a drive gear; 13 g-a limiting sleeve; 13 h-a guide groove; 13 i-pushing the screw; 13 j-a limiting block; 13 k-plug board.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As an embodiment of the utility model, the utility model provides a silo center unloader, including the silo, install a supporting beam in the silo, the central point of supporting beam puts up and is equipped with the decompression awl, the decompression awl is hollow structure, and the cross sectional area of decompression awl grow gradually from top to bottom, the bottom of decompression awl is equipped with at least one base, be equipped with inverter motor on the base, be equipped with slewing bearing before decompression awl and the base, slewing bearing's fixed circle and base fixed connection, slewing bearing's movable circle is connected with the gyration axle sleeve, the center of gyration axle sleeve is fixed with the gyration main shaft, be equipped with the fixing base on the gyration main shaft, be equipped with the unloading arm on the fixing base, the output shaft of each inverter motor all runs through the base and the transmission is connected with drive gear, slewing bearing's movable circle outer lane is equipped with the tooth, drive gear with the tooth meshing, the bottom of the base is provided with a blanking pipe which is communicated with the silo and is positioned at the bottom end of the silo, the outside of the silo is provided with a lubricating system, the lubricating system comprises a transfer oil supply device and a conveying pipeline, and the lubricating system is used for supplying lubricating grease to the slewing bearing and the transmission gear.

Through the design of the central unloading machine, an external drive structure is adopted, namely, a variable frequency motor is installed at the top of a base, so that the central unloading machine is directly visible, the maintenance is facilitated, the operation of the whole machine is reliable, the accident rate is low, even under the special conditions of poor coal quality and high water content, the coal can be continuously and uniformly fed, the conveying speed is controlled by the variable frequency motor, the stepless speed regulation quantitative conveying is realized, the requirement of actual use is met, the central unloading machine is interlocked and jointly controlled with associated equipment, the perfect matching is realized, the unloading amount can be randomly and steplessly regulated in the specified unloading range, the equipment is reliable in operation, reasonable in structure and convenient in maintenance. The sealing and lubricating aspects are safe and reliable: multiple sealing measures are adopted, leakage is avoided, a lubricating system is independently arranged, system lubrication is automatically realized, and the device is simple, convenient and reliable.

The following describes the assembly and disassembly tool in connection with preferred embodiments of the present invention.

Referring to fig. 1 and 2, the central unloading machine includes a silo 1, a support beam 2 is installed in the silo 1, a decompression cone 3 is erected at the central position of the support beam 2, the decompression cone 3 is of a hollow structure, the cross-sectional area of the decompression cone 3 gradually increases from top to bottom, at least one base 4 is arranged at the bottom of the decompression cone 3, and a variable frequency motor 7 is arranged on the base 4, in this embodiment, the variable frequency motor 7 is installed at the bottom of the base 4 and is directly visible. The pressure reducing cone 3 is provided with a slewing bearing 5 in front of a base 4, a fixed ring of the slewing bearing 5 is fixedly connected with the base 4, a movable ring of the slewing bearing 5 is connected with a slewing shaft sleeve, a slewing spindle is fixed at the center of the slewing shaft sleeve, a fixed seat is arranged on the slewing spindle, a discharging arm 6 is arranged on the fixed seat, the slewing shaft sleeve is a bridge between a driving system and the discharging arm 6 and is fixed on the movable ring of the slewing bearing 5, a slewing sealing element 5a is sleeved on the outer ring of the slewing shaft sleeve, the slewing shaft sleeve is directly driven by the slewing bearing 5, and the fixed seat is used for fixing the discharging arm 6 as a tool apron, so that the slewing bearing 5, a slewing inner. An output shaft of each variable frequency motor 7 penetrates through the base 4 and is in transmission connection with a transmission gear 8 through a speed reducer, teeth are arranged on the outer ring of a moving coil of the slewing bearing 5, the transmission gear 8 is meshed with the teeth, a blanking pipe 9 is arranged at the bottom of the base 4, the blanking pipe 9 is communicated with the silo 1 and is located at the bottom end of the silo 1, a lubricating system is arranged outside the silo 1 and comprises a transit oil supply device 11 and a conveying pipeline, and the lubricating system is used for supplying lubricating grease 12 to the slewing bearing 5 and the transmission gear 8.

The driving part of the central unloading machine consists of a double variable frequency motor 7 and a matched speed reducer, and the central unloading machine is mainly characterized by compact structure, high cost performance and long service life. The slewing bearing 5 is a key force-bearing part of the center unloading machine, the outer ring of the moving ring of the slewing bearing 5 adopts a tooth-type structure, the slewing speed is further reduced after the outer ring is matched with the transmission gear 8, and finally the required rotating speed is achieved, the moving ring of the slewing bearing 5 is fixed on the base 4 and bears all slewing torque, axial force, radial force and the like, lubricating grease 12 must be periodically filled in the slewing bearing 5, and the lubricating grease 12 at the position of the slewing bearing 5 and the meshing lubricating grease 12 on the transmission gear 8 are directly and automatically supplied by an external lubricating system. The discharging arm 6 is the most key structural member in the central discharging machine, the whole shape is a logarithmic curve structure, the front end is thin, and the rear end is thick, so that the ideal material taking effect and the lower driving torque are mainly obtained. Because of long-term friction with the medium, the strength and the wear resistance of the material are key design requirements. The discharging arm body is made of alloy steel, the coal facing surface is pasted by a wear-resistant plate, and the most severely worn tip is subjected to alloy surfacing so as to ensure the service life of equipment.

The internal structure of the decompression cone 3 is hollow, the inner cone is erected at the bottom of the silo 1 through at least two radial rigid supporting beams 2, one supporting beam 2 is enlarged to be used as an overhaul channel, and the structure is more stable and reliable in terms of on-site conditions and is convenient for people to enter and exit. In this embodiment, the outer wall of the decompression cone 3 and the inner wall of the silo 1 are provided with protective linings, and the protective linings can be made of stainless steel to improve the self-fluidity when coal contacts. The base 4 is arranged at the bottom of the silo 1 through a flange, is of a plane bearing structure, and the plane of the base bears all coal loads; the chassis is designed into a composite structure, the middle non-load area is assembled on site, the part is called as a central chassis, and the part mainly considers the protection of a friction sealing surface. The pipeline compensator 10 is an unloading outlet of the silo 1, the pipeline compensator 10 is arranged between the blanking pipe 9 and the silo 1 and is directly connected with an inlet of the belt conveyor, the structure of the pipeline compensator is a straight cylinder or flaring form so as to ensure smooth coal dropping, the upper part of the pipeline compensator is connected with a fixed bolt, and the lower opening of the pipeline compensator is inserted into a panel of the belt conveyor and is sealed by rubber.

The central unloading machine adopts an in-situ control mode, a remote control interface is reserved, and free switching can be realized between the central unloading machine and the remote control interface. Controlling in situ: the system is executed on a control cabinet which is arranged near the field of equipment, and can control all functions and complete logical relations. Remote control: the system is controlled by a user in a centralized and unified way and has the functions of controlling, feeding back information such as warning and the like.

Referring to fig. 3 and 4, an oil filling port 11a and an oil outlet 11b are disposed at a bottom end of the transfer oil supply device 11, lubricating grease 12 is contained in the transfer oil supply device 11, and a pushing device 13 for pushing the lubricating grease 12 out of the oil outlet 11b is disposed in the transfer oil supply device 11. The transfer oil supply device 11 periodically lubricates the slewing bearing 5 and the transmission gear 8, the lubrication frequency can be properly adjusted according to field conditions during use, and the lubricating grease 12 adopts No. 2 extreme pressure lithium base grease (GB 7324).

Referring to fig. 5, 6, 7, 8, 9 and 10, the pushing device 13 includes a piston plate 13a, a fixed plate 13b, a driven gear 13c, a mounting plate 13d, a driving motor 13e, a driving gear 13f, a limiting sleeve 13g, a guiding groove 13h and a limiting block 13j, the fixed plate 13b is fixed inside the transit oil supply device 11, and the fixed plate 13b is located at the top of the oil filling opening 11 a. The top end of the fixed disc 13b is rotatably connected with a driven gear 13c, a mounting disc 13d is erected on the fixed disc 13b, a driving motor 13e is arranged on the mounting disc 13d, an output shaft of the driving motor 13e penetrates through the mounting disc 13d and is in transmission connection with a driving gear 13f, the driving gear 13f is meshed with the driven gear 13c, a limiting sleeve 13g is arranged at the top end of the mounting disc 13d, a pushing screw 13i is connected to the limiting sleeve 13g in a sliding mode, one end of the pushing screw 13i penetrates through the fixed disc 13b and is connected with a piston plate 13a, the pushing screw 13i is in threaded connection with the driven gear 13c, the other end of the pushing screw 13i is in threaded connection with a limiting block 13j, a guide groove 13h is formed in the limiting sleeve 13g, and a plug board.

When the transfer oil supply device 11 is used, the oil outlet 11b is connected to a conveying pipeline, a control valve can be further arranged on the conveying pipeline, then a driving motor 13e of the pushing device 13 is started, the driving motor 13e is driven by a driving gear 13f when working, the driving gear 13f can drive a driven gear 13c to rotate, and the screw 13i is forcibly pushed to move up and down under the limitation of a limiting sleeve 13g and a limiting block 13 j. When the pushing screw 13i moves up and down, the pushing piston plate 13a pushes the lubricating grease 12 contained in the transit oil supply device 11, so that the lubricating grease 12 flows into the conveying pipeline from the oil outlet 11b to supply oil.

Claims (7)

1. A silo center unloader is characterized by comprising a silo (1), wherein a supporting beam (2) is installed in the silo (1), a decompression cone (3) is erected at the center of the supporting beam (2), the decompression cone (3) is of a hollow structure, the cross section area of the decompression cone (3) is gradually increased from top to bottom, at least one base (4) is arranged at the bottom of the decompression cone (3), a variable frequency motor (7) is arranged on the base (4), a slewing bearing (5) is arranged in front of the decompression cone (3) and the base (4), a fixed ring of the slewing bearing (5) is fixedly connected with the base (4), a rotating shaft sleeve is connected with a moving ring of the slewing bearing (5), a slewing main shaft is fixed at the center of the slewing shaft sleeve, a fixed seat is arranged on the slewing main shaft, an unloading arm (6) is arranged on the fixed seat, an output shaft of each variable frequency motor (7) penetrates through the base (4) and is in transmission connection with a transmission, the outer ring of the moving coil of the slewing bearing (5) is provided with teeth, the transmission gear (8) is meshed with the teeth, the bottom of the base (4) is provided with a blanking pipe (9), the blanking pipe (9) is communicated with the silo (1) and is positioned at the bottom end of the silo (1), a lubricating system is arranged outside the silo (1), the lubricating system comprises a transfer oil supply device (11) and a conveying pipeline, and the lubricating system is used for supplying lubricating grease (12) to the slewing bearing (5) and the transmission gear (8).

2. A silo central discharger in accordance with claim 1 wherein a pipe compensator (10) is provided between the blanking pipe (9) and the silo (1).

3. A silo central unloader as defined in claim 2 wherein the swivel sleeve is fitted with a swivel seal (5a) around the collar.

4. A silo central unloader as defined in claim 3 wherein the outer wall of the decompression cone (3) and the inner wall of the silo (1) are provided with a protective lining.

5. A silo center unloading machine as claimed in claim 4, characterized in that the bottom end of the transfer oil supply device (11) is provided with an oil filling port (11a) and an oil outlet (11b), the interior of the transfer oil supply device (11) contains the lubricating grease (12), and the interior of the transfer oil supply device (11) is provided with a pushing device (13) for pushing the lubricating grease (12) out from the oil outlet (11 b).

6. A silo center unloader as defined in claim 5 wherein the pushing device (13) comprises a piston plate (13a), a fixed disk (13b), a driven gear (13c), a mounting disk (13d), a driving motor (13e), a driving gear (13f), a limiting sleeve (13g), a guide slot (13h) and a limiting block (13j), the fixed disk (13b) is fixed inside the transfer oil supply device (11), the driven gear (13c) is rotatably connected to the top end of the fixed disk (13b), the mounting disk (13d) is erected on the fixed disk (13b), the driving motor (13e) is arranged on the mounting disk (13d), the output shaft of the driving motor (13e) penetrates through the mounting disk (13d) and is in transmission connection with the driving gear (13f), and the driving gear (13f) is engaged with the driven gear (13c), the top of mounting disc (13d) is equipped with stop sleeve (13g), the inside sliding connection of stop sleeve (13g) has promotion screw rod (13i), and the one end that promotes screw rod (13i) runs through fixed disk (13b) and is connected with piston plate (13a), promotion screw rod (13i) and driven gear (13c) threaded connection, the other end threaded connection that promotes screw rod (13i) have stopper (13j), and guide way (13h) have been seted up in stop sleeve (13g), be equipped with on stopper (13j) with guide way (13h) sliding fit's picture peg (13 k).

7. A silo center discharger according to claim 6 wherein a holding pan (13b) is located on top of the oil fill port (11 a).

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