Coal discharging device of coal mill

Abstract

The utility model relates to a coal discharging device of a coal mill, which belongs to the field of thermal power generation, and solves the problems that impurities, sediments or corrosion products are accumulated in a slow gate valve in the use process, so that the gate valve cannot move normally, is blocked and even is stuck. Fixed seat plates are arranged on the two sides and the rear side of the valve seat respectively, a discharging opening is formed in the middle of the valve seat, transverse grooves penetrating through the valve seat are formed in the periphery of the discharging opening, and movable seats are slidably connected into the transverse grooves in the left side, the right side and the rear side respectively. The coal discharging device is used for coal discharging of the coal mill.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of thermal power equipment, especially relates to a coal feeder of coal mill. BACKGROUND

[0002] The coal mill is the mechanical that will coal block break and grind into coal powder, it is the important auxiliary equipment of coal powder furnace, and the flashboard valve is a kind of coal feeder frequently used in coal mill, and the size of coal quantity is controlled by controlling the size of flashboard valve opening at the inlet and outlet of coal mill. It has the advantages of high coal quantity control precision, good reliability and the like. The existing slow flashboard valve will accumulate impurities, sediments or corrosion products inside during use, and these substances often hinder the normal movement of flashboard, cause flashboard valve to jam or even be stuck, affect the uniformity of coal feeding, and also bring great safety accidents to the normal operation of generator. SUMMARY

[0003] The utility model discloses to aim at the above -mentioned insufficient of prior art, provide a kind of coal feeder of coal mill to prevent slow flashboard valve internal accumulation impurities, sediments or corrosion products during use, cause flashboard valve to be unable to move normally, jam or even be stuck.

[0004] The above-mentioned purpose is realized by the following technical solutions:

[0005] A kind of coal feeder of coal mill, its composition includes valve seat, the valve seat inside movable connection flashboard, the two sides and rear side of the valve seat are provided with fixed seat plate respectively, the middle of the valve seat has discharge port, the horizontal groove that is passed through valve seat is set up around the discharge port, and the horizontal groove in left and right sides and rear side is slidably connected with movable seat respectively.

[0006] The two fixed ears are fixed on the fixed seat plate of the coal feeder of coal mill, one end of the guide rod is passed through the through hole on the movable seat, the other end is screwed on the fixed ear, and the spring is sleeved on the guide rod.

[0007] The coal feeder of coal mill, the extension plate is fixed on the front side of the valve seat, the gas cylinder is fixed on the extension plate, and the push rod end of the gas cylinder is fixed with the flashboard.

[0008] The coal feeder of coal mill, the front end of the flashboard is provided with guide inclined plane on both sides, and the rear end is provided with protruding block.

[0009] The horizontal portion of the movable seat is arc-shaped structure on both sides. Beneficial effects

[0010] 1. The utility model discloses a valve seat rear side and both sides are equipped with movable movable seat, when the plug is inserted, the movable seat of both sides and the movable seat of rear side is pushed out to the outside, after the plug moves to the most front end valve and opens completely, the movable seat will be under the action of spring, and the movable seat obtains greater kinetic energy, and the impurity in the horizontal groove is pushed out, guarantee the cleanness of horizontal groove, ensure that the plug valve can move normally, and will not jam or be deadlocked. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the perspective view of the utility model;

[0012] Figure 2 It is the top view of the utility model;

[0013] Figure 3 It is the internal structure schematic view of the utility model;

[0014] Figure 4 It is the structure schematic view of base;

[0015] Figure 5 It is the structure schematic view of plug;

[0016] Figure 6 It is the structure schematic view of movable seat;

[0017] Figure 7 It is the structure schematic view of adjusting screw rod;

[0018] In the drawing: 1, extension plate;2, plug;3, movable seat;4, fixed seat plate;5, guide rod;6, spring;7, air cylinder;8, valve seat;9, horizontal groove;10, discharge port;11, fixed lug;13, guide inclined plane;14, protruding block;15, cylindrical rod;16, baffle;17, through hole;18, screw rod. DETAILED DESCRIPTION

[0019] REFERENCE Figures 1-7 A coal feeder of coal mill, its composition includes valve seat 8, the valve seat inside movable connection plug 2, the both sides and rear side of valve seat have fixed seat plate 4 respectively, the valve seat has discharge port 10 in the middle, the horizontal groove 9 of through valve seat is set up around the discharge port, and the movable seat 3 is slidably connected in the horizontal groove of left and right sides and rear side respectively.

[0020] The extension plate 1 is fixed on the front side of valve seat, the air cylinder 7 is fixed on the extension plate, and the push rod end of the air cylinder is fixed with the plug;

[0021] The plug is inserted through the horizontal groove in front and back of valve seat by starting the air cylinder, and the plug valve is closed after complete insertion, and the plug valve is opened by withdrawing the plug from the discharge port by the air cylinder;

[0022] The fixed seat plate is fixed with two fixed ears 11, one end of the guide rod 5 passes through the through hole of the movable seat, and the other end is screwed on the fixed ear, and the guide rod is sleeved with a spring 6.

[0023] The guide rod comprises a cylindrical rod 15, the end of the cylindrical rod is provided with a baffle 16, the other end of the baffle is provided with a screw rod 18, the screw rod is screwed on the threaded hole of the fixed ear during installation, the end of the cylindrical rod passes through the through hole 17 of the movable seat, the spring is sleeved on the cylindrical rod, one end of the spring is fixed with the movable seat, and the other end is fixed with the baffle.

[0024] The front end of the plug plate is provided with guide inclined surfaces 13 on both sides, and the rear end is provided with a protruding block 14.

[0025] The horizontal part of the movable seat is provided with an arc structure on both sides.

[0026] The guide inclined surfaces are arranged, so that when the plug plate is pushed into the valve seat, the movable seat can move outward under the pushing of the plug plate, and when the plug plate is inserted into the movable seat on the rear side, the movable seat on the rear side can also be pushed to move outward.

[0027] When the plug plate needs to be pulled out, the cylinder is started to recover, so that the plug plate moves, and after the valve is completely opened, the movable seat moves outward under the action of the spring, the movable seat obtains a large kinetic energy, and the impurities in the horizontal groove are pushed out, so that the horizontal groove is cleaned, and the plug valve can be normally moved, and will not be stuck or deadlocked.

Claims

1. A coal mill underfeed device characterized by The composition comprises a valve seat, the valve seat is movably connected with an insert plate, the two sides and the back side of the valve seat are respectively provided with fixed seat plates, the middle of the valve seat is provided with a discharging port, horizontal grooves penetrating through the valve seat are formed around the discharging port, and movable seats are slidably connected in the horizontal grooves on the left side, the right side and the back side.

2. A coal mill coal feed arrangement according to claim 1 wherein Two fixed ears are fixed on the fixed seat plates, one end of a guide rod penetrates through a through hole in the movable seat, and the other end of the guide rod is threadedly connected with the fixed ears, and a spring is sleeved on the guide rod.

3. A coal mill coal feed arrangement according to claim 2, characterised in that An extension plate is fixed on the front side of the valve seat, a pneumatic cylinder is fixed on the extension plate, and the push rod end of the pneumatic cylinder is fixed with the insert plate.

4. A coal mill coal feed arrangement according to claim 3, characterised in that The front end of the insert plate is provided with guide inclined surfaces on the two sides, and a rear end protruding block.

5. A coal mill coal feed arrangement according to claim 4, characterised in that The horizontal parts of the movable seats are provided with arc structures on the two sides.

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