CN220496591U

CN220496591U - Primary air quantity regulating and controlling device of coal mill

Info

Publication number: CN220496591U
Application number: CN202321541576.XU
Authority: CN
Inventors: 付钦学; 田晓男; 吴海粼; 商丹; 靳明针
Original assignee: Guoneng Shenhua Jiujiang Power Generation Co ltd
Current assignee: Guoneng Shenhua Jiujiang Power Generation Co ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2024-02-20
Anticipated expiration: 2033-06-16

Abstract

The utility model discloses a primary air quantity regulating and controlling device of a coal mill, which comprises an outer frame plate arranged at an air door opening and a regulating and controlling component arranged at the inner side of the outer frame plate, wherein the regulating and controlling component comprises a cylinder body with a first opening and a second opening respectively arranged at two ends and a mounting sleeve arranged at the inner side of the cylinder body, one end outer side of the mounting sleeve is fixedly connected with the cylinder body at the first opening, a plurality of air outlets are uniformly distributed on the side wall of one end close to the first opening by taking an axis as a center, and an electric telescopic rod is arranged at the bottom of the mounting sleeve. The beneficial effects of the utility model are as follows: the electric telescopic rod is controlled to stretch out and draw back through the control box, and the piston block is driven to synchronously move, so that the size of the air outlet is regulated, the primary air quantity of the air inlet is regulated and controlled rapidly, a large amount of regulation and micro regulation can be carried out, and the regulation is convenient and flexible.

Description

Primary air quantity regulating and controlling device of coal mill

Technical Field

The utility model relates to the technical field related to energy power equipment, in particular to a primary air quantity regulating device of a coal mill.

Background

In order to ensure the grinding and powder outlet efficiency of the coal mill, the primary air quantity of the coal mill is matched with the coal quantity of the coal inlet coal mill, and the primary air regulating door of the coal mill needs to be frequently regulated in the operation process. Meanwhile, due to abrasion of the grinding part, the coal mill is frequently subjected to standby maintenance in the running process of the unit, so that a primary air heating air door of the coal mill is required to be reliably closed, and the heat of hot air is prevented and isolated from entering the coal mill in a standby or maintenance state.

At present, the hot air regulating door in the market mainly has the defects of regulating jamming, regulating opening linearity, unmatched air quantity and the like, and the opening cannot be regulated at any time according to operation requirements, so that the unit efficiency is directly influenced, and the coal consumption is increased. Meanwhile, the traditional electric actuating mechanism for adjusting the air through hot air in the market is connected with the adjusting door plate through a pull rod, the idle stroke is too large, and the displayed switching degree and the actual opening degree of the electric actuating mechanism are too large in deviation.

Disclosure of Invention

The utility model aims to provide a primary air quantity regulating device of a coal mill, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a once amount of wind controlling means of coal pulverizer, includes the outer frame board that sets up in air door mouth department and sets up the regulation and control subassembly inboard at the outer frame board, regulation and control subassembly includes that first opening, second open-ended barrel, the setting are in the inboard installation cover of barrel have been seted up respectively at both ends, the one end outside of installation cover with the barrel is at first opening part fixed connection, just the installation cover is being close to first open-ended one end lateral wall and taking the axis as the center equipartition to be provided with a plurality of air outlets, the bottom of installation cover is provided with electric telescopic handle, electric telescopic handle's expansion end with the inside piston block terminal surface fixed connection of installation cover.

Preferably, the whole barrel is positioned at the inner side of the outer frame plate, and two ends of the barrel are fixedly connected with the outer frame plate through connecting bolts.

Preferably, the device further comprises a monitoring assembly, the monitoring assembly comprises a connecting mechanism arranged outside the mounting sleeve and a movable plate arranged at the second opening, the connecting mechanism comprises a connecting column and a mounting cavity arranged inside the connecting column, the connecting column is provided with a movable column inside the mounting cavity, and one end of the movable column extends to the outer side of the connecting column and is fixedly connected with one side center of the movable plate.

Preferably, the connecting column is provided with a first limit ring and a second limit ring on the inner wall of the installation cavity, the outer side of the movable column, which is close to one end of the installation cavity, is provided with a fixed ring, and the fixed ring is positioned between the first limit ring and the second limit ring.

Preferably, the monitoring assembly further comprises a measuring mechanism, the measuring mechanism is composed of a jack and a fixed column, the jack is arranged at one end of the movable column, far away from the movable plate, of the movable column, the conductive torch is arranged on the inner wall of the jack, one end of the fixed column is inserted into the jack, a contact is arranged at the end of the fixed column, and the contact is slidably connected with the inner wall of the conductive cylinder.

Preferably, the connecting column is provided with a wiring board at the bottom of the mounting cavity, and the wiring board is connected with the ends of the contact and the conductive cylinder through wires respectively.

Preferably, a compression spring is arranged on the outer side of the movable column, and two ends of the compression spring are respectively abutted with the side face of the fixed ring and the inner wall of the mounting cavity.

Preferably, the length of the piston block is greater than or equal to the length of the air outlet.

Preferably, the connecting column is provided with a sliding rail on the inner wall of the mounting cavity, and the sliding rail is in sliding connection with the sliding groove on the outer wall of the fixing ring.

Preferably, a control box is arranged in the mounting sleeve, and the control box is connected with the electric telescopic rod and the wiring board through wires respectively.

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

1. through setting up regulation and control subassembly in air door mouth department to pass through the wire with regulation and control subassembly's electric telescopic handle and control box and be connected, place the piston piece in the air outlet department of installation cover and with electric telescopic handle, and then it is flexible to control electric telescopic handle through the control box, and drive piston piece synchronous motion, realize adjusting the size of air outlet, carry out quick regulation and control to the primary air quantity of air door mouth, can carry out a large amount of regulation, also can carry out the micro-regulation, the convenience of regulation, the flexibility again of use.

2. Through set up the control subassembly in the outside of installation cover to set up the fly leaf of control subassembly in the second opening part of barrel, and the fly leaf passes through the swing post with the spliced pole and be connected, set up the electric torch that leads in the jack department of swing post, with the inner wall sliding connection of contact and electric torch, and all be connected with the control box with contact, electric torch, and then drive swing post, electric torch simultaneous movement by the fly leaf, the change of electric current in the control box monitoring circuit calculates the motion distance of fly leaf, the quick judgement once amount of wind size, combines electric telescopic handle, realizes the accurate control to the amount of wind once.

Drawings

FIG. 1 is a schematic overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the cylinder of the present utility model;

FIG. 3 is a schematic diagram of a monitoring assembly according to the present utility model;

FIG. 4 is a schematic view showing the internal structure of the connecting column of the present utility model;

fig. 5 is a schematic structural view of the retainer ring of the present utility model.

In the figure: 1. an outer frame plate; 2. a first opening; 3. a second opening; 4. a cylinder; 5. a mounting sleeve; 6. an air outlet; 7. an electric telescopic rod; 8. a piston block; 9. a connecting bolt; 10. a movable plate; 11. a connecting column; 12. a mounting cavity; 13. a movable column; 14. a first limit ring; 15. a second limit ring; 16. a fixing ring; 17. a jack; 18. fixing the column; 19. a conductive torch; 20. a contact; 21. a wiring board; 22. a compression spring; 23. a slide rail; 24. a chute; 25. and a control box.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, the primary air volume control device of a coal mill provided by the utility model comprises an outer frame plate 1 arranged at an air door opening and a control assembly arranged at the inner side of the outer frame plate 1. The regulating and controlling component comprises a cylinder body 4 with two ends respectively provided with a first opening 2 and a second opening 3, and a mounting sleeve 5 arranged on the inner side of the cylinder body 4, wherein the whole cylinder body 4 is positioned on the inner side of the outer frame plate 1, and the two ends of the cylinder body 4 are fixedly connected with the outer frame plate 1 through connecting bolts 9.

One end outside of the installation sleeve 5 is fixedly connected with the cylinder body 4 at the first opening 2, a plurality of air outlets 6 are uniformly distributed on the side wall of one end close to the first opening 2 by taking the axis as the center, an electric telescopic rod 7 is arranged at the other end of the installation sleeve 5, which is relatively connected with the first opening 2, and the movable end of the electric telescopic rod 7 is fixedly connected with the end face of a piston block 8 inside the installation sleeve 5. The length of the piston block 8 is greater than or equal to the length of the air outlet 6.

As shown in fig. 3, the monitoring device further comprises a monitoring component, the monitoring component comprises a connecting mechanism arranged on the outer side of the mounting sleeve 5 and a movable plate 10 arranged at the second opening 3, the connecting mechanism comprises a connecting column 11 and a mounting cavity 12 arranged on the inner side of the connecting column 11, the connecting column 11 is provided with a movable column 13 in the mounting cavity 12, and one end of the movable column 13 extends to the outer side of the connecting column 11 and is fixedly connected with one side center of the movable plate 10. The connecting column 11 is provided with a first limit ring 14 and a second limit ring 15 on the inner wall of the mounting cavity 12, the outer side of the movable column 13, which is close to one end of the mounting cavity 12, is provided with a fixed ring 16, and the fixed ring 16 is positioned between the first limit ring 14 and the second limit ring 15.

As shown in fig. 4, the monitoring assembly further comprises a measuring mechanism, the measuring mechanism is composed of a jack 17 and a fixed column 18 which are arranged at one end of the movable column 13 far away from the movable plate 10, a conductive cylinder 19 is arranged on the inner wall of the jack 17 by the movable column 13, one end of the fixed column 18 is inserted into the jack 17, a contact 20 is arranged at the end of the fixed column 18, and the contact 20 is in sliding connection with the inner wall of the conductive cylinder 19. The connection post 11 is provided with a wiring board 21 at the bottom of the installation cavity 12, and the wiring board 21 is connected with the ends of the contact 20 and the conductive cylinder 19 by wires, respectively.

The outside of the movable column 13 is provided with a compression spring 22, and both ends of the compression spring 22 are respectively abutted against the side surface of the fixed ring 16 and the inner wall of the mounting cavity 12.

The connecting column 11 is provided with a slide rail 23 on the inner wall of the mounting cavity 12, and the slide rail 23 is in sliding connection with a slide groove 24 on the outer wall of the fixed ring 16. The control box 25 is arranged in the mounting sleeve 5, and the control box 25 is respectively connected with the electric telescopic rod 7 and the wiring board 21 through wires.

Specifically, install the device wholly in the door mouth department, in the use, work through control box 25 control electric telescopic handle 7, the piston piece 8 of its expansion end is driven by electric telescopic handle 7 and is in the inside motion of installation cover 5, and then through the relative position of piston piece 8 and installation cover 5, carry out the fast adjustment to the size of air outlet 6, simultaneously when the primary air passes through second opening 3, make fly leaf 10 and movable column 13 remove, and compression spring 22 is in compression state gradually, and movable column 13 drives its inboard conductive cylinder 19 motion, make conductive cylinder 19 and contact 20 take place the change of relative position, and then monitor the primary air volume of air door mouth.

In the above, since the whole shape of the conductive tube 19 is regular, i.e. the resistance of the unit length is the same, when the movable column 13 drives the conductive tube 19 to gradually get away from the contact 20, the distance between the contact 20 and one end of the conductive tube 19, which is close to the wiring board 21, is reduced, and the control box 25 determines the distance of the movement of the movable plate 10 by detecting the current in the circuit, and controls the electric telescopic rod 7 according to the distance, so as to realize rapid regulation and control of the primary air volume.

When the piston block 8 is completely positioned at the right end of the air outlet 6, the primary air quantity is at the maximum value, and the distance between the movable plate 10 and the mounting sleeve 5 is the maximum; when the end face of the piston block 8 is positioned at the left end of the air outlet 6, the air outlet 6 is completely closed, the acting force exerted by the movable plate 10 is minimum, and the movable plate 10 is wholly positioned at the second opening 3 under the action of the compression spring 22.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," "fourth" may explicitly or implicitly include at least one such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coal pulverizer air quantity regulation and control device, its characterized in that, including setting up outer frame board (1) and the regulation and control subassembly of setting in outer frame board (1) inboard in air door mouth department, regulation and control subassembly includes that both ends have seted up first opening (2), barrel (4) of second open-ended (3) respectively, set up at barrel (4) inboard installation cover (5), the one end outside of installation cover (5) with barrel (4) are in first opening (2) department fixed connection, just installation cover (5) are being close to the one end lateral wall of first opening (2) and taking the axis as central equipartition and are provided with a plurality of air outlets (6), the bottom of installation cover (5) is provided with electric telescopic handle (7), electric telescopic handle (7) the expansion end with the inside piston block (8) terminal surface fixed connection of installation cover (5).

2. The primary air quantity control device of a coal mill according to claim 1, wherein: the whole barrel (4) is positioned at the inner side of the outer frame plate (1), and two ends of the barrel (4) are fixedly connected with the outer frame plate (1) through connecting bolts (9).

3. The primary air quantity control device of a coal mill according to claim 1, wherein: still include the control subassembly, the control subassembly is including setting up in coupling mechanism, setting in the installation cover (5) outside are in fly leaf (10) of second opening (3) department, coupling mechanism includes spliced pole (11), sets up at the inboard installation cavity (12) of spliced pole (11), spliced pole (11) are provided with movable column (13) in the inside of installation cavity (12), the one end of movable column (13) extend to the outside of spliced pole (11) and with one side center department fixed connection of fly leaf (10).

4. The primary air quantity control device of a coal mill according to claim 3, wherein: the connecting column (11) is provided with a first limit ring (14) and a second limit ring (15) on the inner wall of the mounting cavity (12), a fixed ring (16) is arranged on the outer side, close to one end of the mounting cavity (12), of the movable column (13), and the fixed ring (16) is located between the first limit ring (14) and the second limit ring (15).

5. The primary air quantity control device of a coal mill according to claim 3, wherein: the monitoring assembly further comprises a measuring mechanism, the measuring mechanism is composed of a jack (17) and a fixed column (18) which are arranged at one end of the movable column (13) away from the movable plate (10), a conductive cylinder (19) is arranged on the inner wall of the jack (17), one end of the fixed column (18) is inserted into the jack (17), a contact (20) is arranged at the end of the fixed column (18), and the contact (20) is in sliding connection with the inner wall of the conductive cylinder (19).

6. The primary air quantity control device of a coal mill according to claim 5, wherein: the connecting column (11) is provided with a wiring board (21) at the bottom of the mounting cavity (12), and the wiring board (21) is connected with the ends of the contact (20) and the conductive cylinder (19) through wires respectively.

7. The primary air quantity control device of a coal mill according to claim 4, wherein: the outside of movable column (13) is provided with compression spring (22), compression spring (22) both ends respectively with the side of retainer plate (16), the inner wall butt of installation cavity (12).

8. The primary air quantity control device of a coal mill according to claim 1, wherein: the length of the piston block (8) is greater than or equal to the length of the air outlet (6).

9. The primary air quantity control device of a coal mill according to claim 4, wherein: the connecting column (11) is provided with a sliding rail (23) on the inner wall of the mounting cavity (12), and the sliding rail (23) is in sliding connection with a sliding groove (24) on the outer wall of the fixed ring (16).

10. The primary air quantity control device of a coal mill according to claim 1, wherein: the inside of installation cover (5) is provided with control box (25), the wire that passes through of control box (25) is connected with electric telescopic handle (7), wiring board (21) respectively.