CN217663592U

CN217663592U - Sieving device for coal mill of power plant boiler

Info

Publication number: CN217663592U
Application number: CN202221104628.2U
Authority: CN
Inventors: 李东硕; 李俊林
Original assignee: Shenyang Heavy Power Equipment Manufacture Co ltd
Current assignee: Shenyang Heavy Power Equipment Manufacture Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-10-28
Anticipated expiration: 2032-05-10

Abstract

The utility model provides a power boiler coal pulverizer is with device that sieves belongs to the technical field of coal breaker, including double-screen grinder, double-screen grinder includes the box, top cap and sieve section of thick bamboo, sieve section of thick bamboo inner wall bottom is provided with the mounting groove, be provided with first motor in the mounting groove, the output of first motor is provided with circular tray, two lateral margin positions of circular tray upper surface all rotate and are connected with the grinding roller that has the lug, box inner wall both sides are provided with the spout, and two spouts are located same height, the equal sliding connection of every spout has the slider, be provided with the sieve between two sliders, through the utility model discloses, realized the extension to the time that the coal cinder ground was sieved, avoid appearing the coal cinder that does not grind, adopt the extruded mode to extrude the sieve section of thick bamboo with the coal cinder grinding, improved the intensity that grinds at every turn and sieve greatly, avoid sieving many times, improved the work efficiency of the operation of sieving.

Description

Sieving device for coal mill of power plant boiler

Technical Field

The utility model mainly relates to a technical field of coal pulverizer specifically is a power boiler coal pulverizer is with device that sieves.

Background

Coal mills are machines that break up coal briquettes and grind them into coal fines, and are important auxiliary equipment for coal powder furnaces. The coal grinding process mainly comprises three modes of crushing, breaking and grinding, wherein the energy consumed in the crushing process is the least, the energy consumed in the grinding process is the most, and various coal mills have two or three modes in the grinding process, but the type of the coal mill is determined mainly, and the sieving device is an important component of the coal mill of the boiler of the power plant.

In present current power boiler coal pulverizer sieves the device, for example, the application number is CN202121179913.6 application document's technical structure, including the device body, device body top outer fixed surface is connected with the pan feeding mouth, the fixed circulation mouth that is equipped with of pan feeding mouth upside, device body one side outside fixed surface is connected with first motor, first motor output fixedly connected with grinding roll, grinding roll outside fixed surface is equipped with a plurality of and grinds the arch, grinding roll downside fixedly connected with unloading funnel, unloading funnel downside is equipped with the screen cloth, the screen cloth both ends all run through device body both sides inner wall, device body one side outside fixed surface is equipped with the fourth motor, fourth motor output fixedly connected with carousel, carousel edge fixedly connected with connecting rod, the device have realized sieving to the coal cinder, but because the coal cinder is at the in-process of vertical descending, the time spent is very short at every turn to grinding roll grinds the time of coal cinder very short, leads to having partial coal cinder not to exist and is not ground, only increases the number of following bad and solves the coal cinder that does not cause the garrulous of energy, has reduced the waste of work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a power boiler coal pulverizer is with device that sieves for solve the technical problem who proposes in the above-mentioned background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a power boiler coal pulverizer is with device that sieves, includes double-sieve grinder, double-sieve grinder includes box, top cap and a sieve section of thick bamboo, the top cap is located the open position of box upper end, and a sieve section of thick bamboo is located the box inner chamber, and a sieve section of thick bamboo passes through support and box inner wall connection, sieve section of thick bamboo inner wall bottom is provided with the mounting groove, be provided with first motor in the mounting groove, the output of first motor is provided with circular tray, two lateral margin positions of circular tray upper surface all rotate and are connected with the grinding roller that has the lug, box inner wall both sides are provided with the spout, and two spouts are located same height, every the equal sliding connection of spout has the slider, two be provided with the sieve between the slider.

Further, be close to every the lower extreme of spout all is provided with the second motor, and two second motor synchronous operation, every the shell of second motor all imbeds in the recess of box inner wall, every the output of second motor all is provided with the carousel, and every carousel all rotates through the pivot and is connected with the link, is articulated between link upper end and the sieve downside.

Furthermore, a pulverized coal collecting tank is arranged at the bottom of the box body, and a sealing strip is arranged on the pulverized coal collecting tank.

Furthermore, the opening position of box outer wall one side is provided with arranges the sediment lid, just arranges to arrange and is articulated between sediment lid and the box lateral wall.

Furthermore, electric telescopic rods are arranged in grooves at four vertex angles of the upper surface of the outer wall of the box body, and the upper ends of the electric telescopic rods are connected with the lower surface of the top cover.

Furthermore, a coal dropping pipeline interface is arranged at the central position of the upper side of the top cover.

Furthermore, four vertex angles at the bottom of the outer wall of the box body are provided with foot cups.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a double-sieve grinder, realized the extension and ground the time of sieving to the coal cinder, avoid appearing the coal cinder that does not grind, adopt extruded mode to extrude the coal cinder grinding sieve section of thick bamboo, the intensity that grinds the sieve at every turn has improved greatly, avoid sieving many times, the work efficiency of the operation of sieving has been improved, and moreover, the steam generator is convenient for install, practicality very, concrete operation is as follows, at first place the whole screen section of thick bamboo of level subaerial with the device, then whether each device of inspection device whole internal has the potential safety hazard, switch on after guaranteeing not having the potential safety hazard, then with coal breakage pipe connection with the pipe connection that corresponds, the coal cinder passes through in the coal breakage pipe connection gets into the sieve section of thick bamboo afterwards, and shorten the back at electric telescopic handle, the top cap can just cover at sieve section of thick bamboo upside, then first motor drive circular tray rotates, thereupon two grinding rollers on the circular tray will with the screen section of thick bamboo inner wall between the coal cinder grinding, make only the coal cinder after the grinding just can filter out from the sieve section of thick bamboo, then second motor drive carousel rotates, thereby make the connection frame lower extreme do the circular motion round, make two times of the screen in the coal cinder that the screening efficiency that the screen that shakes better secondary that the screening goes on the screen section of thick bamboo that the screen, the last screening efficiency that the screening goes on the screen that the level reduces the secondary that the screening is better, the screening efficiency that the screening is gone on the screen.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

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

FIG. 2 is a schematic view of the connection structure of the box, the top cover, the screen drum and other parts of the present invention;

FIG. 3 is a schematic cross-sectional view of the internal structure of the case of the present invention;

fig. 4 is an enlarged view of the area of fig. 3A.

In the figure: 1. a double screen grinding device; 11. a box body; 111. a chute; 112. a slider; 113. a sieve plate; 114. an electric telescopic rod; 115. a slag discharge cover; 12. a top cover; 121. a coal dropping pipeline interface; 13. a screen drum; 131. mounting grooves; 14. a first motor; 15. a circular tray; 16. grinding the roller; 17. a second motor; 171. a turntable; 172. a connecting frame; 18. a pulverized coal collecting tank; 181. a sealing strip; 2. a foot cup.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, and on the contrary, these embodiments are provided so as to make the disclosure more thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-4 heavily, a sieving device for a coal mill of a power plant boiler comprises a double-sieve grinding device 1, wherein the double-sieve grinding device 1 comprises a box body 11, a top cover 12 and a sieve drum 13, the top cover 12 is located at an opening position at the upper end of the box body 11, the sieve drum 13 is located in an inner cavity of the box body 11, the sieve drum 13 is connected with an inner wall of the box body 11 through a support, an installation groove 131 is arranged at the bottom of the inner wall of the sieve drum 13, a first motor 14 is arranged in the installation groove 131, an output end of the first motor 14 is provided with a circular tray 15, two side edge positions on the upper surface of the circular tray 15 are rotatably connected with grinding rollers 16 with convex blocks, two sliding grooves 111 are arranged on two sides of the inner wall of the box body 11, the two sliding grooves 111 are located at the same height, each sliding groove 111 is slidably connected with a sliding block 112, and a sieve plate 113 is arranged between the two sliding blocks 112.

The double-screen grinding device 1 is adopted in the structure, so that the grinding and screening time of the coal blocks is prolonged, the coal blocks which are not ground are prevented from appearing, the coal blocks are ground out of the screen cylinder 13 in an extrusion mode, the grinding and screening strength of each time is greatly improved, multiple screening is avoided, the working efficiency of screening operation is improved, and the double-screen grinding device is stable in structure, convenient to install and very practical;

the specific operation is as follows, firstly, the whole device is placed on a horizontal ground, then whether potential safety hazards exist in all devices in the whole device is checked, after no potential safety hazards exist, a power supply is switched on, then the coal dropping pipeline interface 121 is connected with a corresponding pipeline, then coal blocks enter the screen cylinder 13 through the coal dropping pipeline interface 121, after the electric telescopic rod 114 is shortened, the top cover 12 can just cover the upper side of the screen cylinder 13, then the first motor 14 drives the circular tray 15 to rotate, then the two grinding rollers 16 on the circular tray 15 grind the coal blocks between the two grinding rollers and the inner wall of the screen cylinder 13, only the ground coal blocks can be filtered out from the screen holes in the screen cylinder 13, then the second motor 17 drives the rotary disc 171 to rotate, the lower end of the connecting frame 172 does circular motion around the rotary disc 171, the screen plate 113 shakes up and down, the effect is better compared with the horizontal shaking effect, the screening strength is larger, the coal blocks penetrating through the screen cylinder 13 are screened twice, the final coal powder enters the collecting tank 18 on the lower side of the screen plate 113, the total number of the screening process is reduced, and the screening frequency and the screening efficiency and the intensity of each time of each screening are improved.

Please refer to fig. 1 and fig. 2, a coal dust collecting tank 18 is disposed at the bottom of the box 11, a sealing strip 181 is disposed on the coal dust collecting tank 18, the coal dust collected after double screening is collected in a centralized manner through the coal dust collecting tank 18, and the sealing strip 181 seals a gap between the coal dust collecting tank 18 and the box 11 to prevent the coal dust from overflowing out of the box 11, a slag discharge cover 115 is disposed at an opening position on one side of an outer wall of the box 11, the slag discharge cover 115 is hinged to a side wall of the box 11, so that a large coal block which cannot pass through the screen plate 113 is cleaned through the slag discharge cover 115 after screening is achieved, electric telescopic rods 114 are disposed in grooves at four vertex angles on an upper surface of the outer wall of the box 11, an upper end of each electric telescopic rod 114 is connected to a lower surface of the top cover 12, a power source is provided for upward and downward movement of the top cover 12 through the electric telescopic rods 114, a coal drop pipe port 121 is disposed at a central position on an upper side of the top cover 12, and a pipe port 121 for butt joint with a pipe for transporting the coal blocks is provided with four vertex angles, and a cup 2 is provided to facilitate butt joint with the coal pipe 121 on the box 11.

Please refer to fig. 3 and fig. 4, a second motor 17 is disposed at a position close to the lower end of each sliding chute 111, the two second motors 17 run synchronously, the housing of each second motor 17 is embedded in a groove on the inner wall of the box 11, a rotating disc 171 is disposed at the output end of each second motor 17, each rotating disc 171 is rotatably connected with a connecting frame 172 through a rotating shaft, the upper end of the connecting frame 172 is hinged to the lower side of the sieve plate 113, and the second motor 17, the rotating disc 171 and the connecting frame 172 are mutually matched to provide driving force for the sieve plate 113 to shake up and down, so as to perform secondary screening on pulverized coal and improve the screening effect.

The above description is taken as an example to describe the present invention with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, as long as the present invention is adopted, the method concept and the technical solution of the present invention are performed to perform this kind of insubstantial improvement, or the concept and the technical solution of the present invention are directly applied to other occasions without improvement, all within the protection scope of the present invention.

Claims

1. The utility model provides a power boiler coal pulverizer is with device that sieves, includes double screen grinder (1), its characterized in that, double screen grinder (1) is including box (11), top cap (12) and a sieve section of thick bamboo (13), top cap (12) are located the open position of box (11) upper end, and a sieve section of thick bamboo (13) are located box (11) inner chamber, and sieve section of thick bamboo (13) are through support and box (11) interior wall connection, sieve section of thick bamboo (13) inner wall bottom is provided with mounting groove (131), be provided with first motor (14) in mounting groove (131), the output of first motor (14) is provided with circular tray (15), two lateral margin positions of circular tray (15) upper surface all rotate and are connected with grinding roller (16) that have the lug, box (11) inner wall both sides are provided with spout (111), and two spout (111) are located same height, every spout (111) equal sliding connection has slider (112), two be provided with sieve (113) between slider (112).

2. A sieving device for a power plant boiler coal mill according to claim 1, characterized in that a second motor (17) is provided near each lower end of the chute (111), and two second motors (17) run synchronously, each outer shell of the second motor (17) is embedded in a groove of the inner wall of the box body (11), each output end of the second motor (17) is provided with a rotary table (171), each rotary table (171) is connected with a connecting frame (172) through a rotary shaft, and the upper end of the connecting frame (172) is hinged with the lower side of the sieve plate (113).

3. The sieving device for the coal mill of the power plant boiler according to claim 1, characterized in that a coal dust collecting groove (18) is arranged at the bottom of the box body (11), and a sealing strip (181) is arranged on the coal dust collecting groove (18).

4. The sieving device for the coal mill of the power plant boiler according to claim 3, characterized in that a slag discharge cover (115) is arranged at an opening position on one side of the outer wall of the box body (11), and the slag discharge cover (115) is hinged with the side wall of the box body (11).

5. The sieving device for the coal mill of the power plant boiler according to claim 4, characterized in that electric telescopic rods (114) are arranged in grooves at four vertex angles on the upper surface of the outer wall of the box body (11), and the upper end of each electric telescopic rod (114) is connected with the lower surface of the top cover (12).

6. The sieving device for the coal mill of the power plant boiler according to claim 5, characterized in that a coal dropping pipe joint (121) is arranged at the central position of the upper side of the top cover (12).

7. The sieving device for the coal mill of the power plant boiler according to claim 5, characterized in that the foot cups (2) are arranged at four top corners of the bottom of the outer wall of the box body (11).