CN210291927U

CN210291927U - Lower return chain scraper slag conveyor

Info

Publication number: CN210291927U
Application number: CN201920906471.7U
Authority: CN
Inventors: 李强; 顾军; 朱延臣
Original assignee: Beijing Building Materials Academy of Sciences Research
Current assignee: Beijing Building Materials Academy of Sciences Research
Priority date: 2019-06-15
Filing date: 2019-06-15
Publication date: 2020-04-10
Anticipated expiration: 2029-06-15

Abstract

The utility model discloses a lower chain scraper slag conveyor, which comprises a tail chain wheel, a chain plate, a chain, a scraper blade, a motor, a head chain wheel, a slag outlet, a shell and a slag sweeping plate, wherein the tail chain wheel and the head chain wheel are wrapped with the chain, the chain drives the tail chain wheel to move, and the head chain wheel drives the chain to move; a chain plate is fixed on the chain and drives the chain plate to move; the chain plate is supported with a scraper which is driven to move; the upper end of the inclined section of the shell is provided with a motor connected with a head chain wheel, and the motor drives the head chain wheel to move; a slag sweeping plate which is contacted with the chain is arranged on the upper side of the head chain wheel; a slag outlet is arranged below the upper end of the shell, and slag is discharged through the slag outlet; the motor protection form is mechanical overload protection. The utility model provides a current frequent chain wheel of blocking of chain dragveyer and overcurrent protection easily cause equipment harm and the problem of emergence production accident.

Description

Lower return chain scraper slag conveyor

Technical Field

The utility model relates to a solid useless gasifier slag removal equipment technical field of handling, in particular to lower back chain scraper blade dragveyer.

Background

The solid waste is gasified and burned in the gasification furnace, and fine ash particles and blocky inorganic matters of the burned-out slag are bonded with each other to form slag. The scraper slag conveyor is used for cooling and discharging slag falling from the hearth. The tail part of the scraper slag extractor for removing slag of the solid waste treatment gasification furnace is a slag receiving section which is a closed hearth and a water tank for receiving slag. Furnace bottom slag falls into the basin through the slag well and stalls the back, is fished out from the aquatic by the scraper blade of chain drive to slope upward movement, send to the head end slag notch and discharge.

The solid waste gasification furnace generally adopts an upper return chain slag conveyor, namely, the return stroke of a chain driving a scraper is from the upper part of the working stroke of the solid waste gasification furnace. Because the difference of the solid waste components of incineration is large and the situation that slag discharging is not timely can occur, slag can form a large slag block in the furnace, the upper return chain slag conveyor has high probability of blocking a chain wheel due to the fact that the slag is close to a head chain wheel from the lower part, and once the chain wheel is blocked by the slag, problems such as shaft bending, chain breaking and the like can occur, and production accidents occur.

It can be seen that the above prior art has the following disadvantages:

firstly, the condition that the equipment is damaged due to the fact that a part of slag forms large slag blocks and chain wheels are clamped.

And secondly, when the large slag blocks clamp the chain wheel, the main transmission needs to be cut off due to overlarge external force load. An overcurrent protector is adopted in a common slag conveyor. When the current of the motor rises to exceed the limit value, the power supply is automatically cut off, and the function of protecting equipment is achieved. However, the time for cutting off the power source by the overcurrent of the motor is longer, the shortest time is 3 seconds, and the power source and a chain wheel of the slag conveyor rotate synchronously at the moment. Even if the current is cut off within a 3 second period, the residual torque from the inertia of the motor is sufficient to break the sprocket or chain of the dragger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at guaranteeing that the solid useless gasifier of handling carries normally to arrange the sediment, the design provides a lower back chain scraper blade dragveyer to solve the problem that the equipment that current upper back chain dragveyer frequently blocks sprocket and overcurrent protection easily caused harms and takes place the production accident.

In order to achieve the above object, the utility model adopts the following technical scheme:

a lower chain return scraper slag conveyor comprises a tail chain wheel, a chain plate, a chain, a scraper, a motor, a head chain wheel, a slag outlet, a shell and a slag sweeping plate, wherein the tail chain wheel and the head chain wheel are wrapped by the chain, the chain drives the tail chain wheel to move, and the head chain wheel drives the chain to move; a chain plate is fixed on the chain and drives the chain plate to move; the chain plate is supported with a scraper which is driven to move; the upper end of the inclined section of the shell is provided with a motor connected with a head chain wheel, and the motor drives the head chain wheel to move; a slag sweeping plate which is contacted with the chain is arranged on the upper side of the head chain wheel; a slag outlet is arranged below the upper end of the shell, and slag is discharged through the slag outlet.

The motor protection form is mechanical overload protection.

The slag sweeping plate comprises a main body part, a flexible part, a rubber plate and a bolt.

The utility model has the advantages that:

(1) the lower return chain slag conveyor is adopted, and the problem that the large slag frequently blocks the chain wheel is solved because the slag is close to the head chain wheel from the upper part.

(2) Mechanical overload protection is adopted, and equipment can be quickly separated when external force load is overlarge, so that the effect of protecting the slag conveyor is achieved.

(3) The slag sweeping plate is arranged on the lower return chain slag conveyor, so that slag on the chain can be swept, and the chain is further protected.

Drawings

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

fig. 2 is a schematic structural diagram of the slag sweeping plate.

In the figure: 1-tail chain wheel, 2-chain plate, 3-chain, 4-scraper, 5-motor, 6-head chain wheel, 7-slag hole, 8-shell, 9-slag sweeping plate; 11-main part, 12-flexible part, 13-rubber plate, 14-bolt.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, a bottom-return chain scraper slag conveyor comprises a tail chain wheel 1, a chain plate 2, a chain 3, a scraper 4, a motor 5, a head chain wheel 6, a slag outlet 7, a shell 8 and a slag sweeping plate 9, wherein the chain 3 is wrapped on the tail chain wheel 1 and the head chain wheel 6, the chain 3 drives the tail chain wheel 1 to move, and the head chain wheel 6 drives the chain 3 to move; a chain plate 2 is fixed on the chain 3, and the chain 3 drives the chain plate 2 to move; a scraper 4 is supported on the chain plate 2, and the chain plate 2 drives the scraper 4 to move; the upper end of the inclined section of the shell 8 is provided with a motor 5 connected with a head chain wheel 6, and the motor 5 drives the head chain wheel 6 to move; a slag sweeping plate 9 which is contacted with the chain 3 is arranged on the upper side of the head chain wheel 6; a slag outlet 7 is arranged below the upper end of the shell 8, and slag is discharged through the slag outlet 7.

To the condition that easy chain wheel of card causes harm equipment in the current chain dragveyer of returning upward, propose the processing mode and be: the upper return chain slag remover is changed into a lower return chain slag remover, and a slag sweeping plate 9 is added. Because the slag of the lower return chain slag conveyor is close to the head chain wheel 6 from the upper part, the situation that the slag clamps the chain wheel does not exist, and the failure rate can be greatly reduced.

As shown in fig. 2, the slag sweeping plate 9 includes a main body portion 11, a flexible portion 12, a rubber plate 13, and bolts 14. The main body 11 is made of metal, so that the slag sweeping plate 9 has certain weight. When the slag sweeping plate 9 blocks the slag and rotates to a certain angle under the driving of the slag, the slag sweeping plate 9 can swing under the action of the gravity of the slag sweeping plate 9, so that the slag is separated from the chain 3. The main body 11 is provided with flexible parts 12 on both the inner and outer surfaces thereof, the flexible parts 12 are made of rubber or the like, and the main body 11 and the flexible parts 12 are fixed together by two rubber plates 13 through bolts 14.

Aiming at the problem that the overcurrent protection of the existing slag conveyor can not cut off the power source quickly, the method provides a processing mode as follows: the protection mode of the motor 5 is changed into a shear type mechanical overload protection mode.

The mechanical overload protector is characterized in that: the precise automatic reset steel ball type torque limiter is internally provided with a precise ball mechanism, and the overload torque is adjusted through the compression amount of a disc spring, so that the precision reaches 1%. The main driven can be disengaged at the moment of overload; reaction time: 0.001-0.003 seconds; the disengagement torque set point can be adjusted steplessly within certain limits by means of a dial. When the ball bearing works normally, a plurality of steel balls are inlaid in the grooves, and the balls are tightly connected with the grooves without gaps. When overload occurs, the ball slides out of the groove to be separated; the active and passive transmissions are completely disconnected; the attached signal sensor can capture an overload signal at the overload moment, output 24V direct current and start an alarm device. After the overload is eliminated, the machine is restarted and the balls will automatically re-engage the grooves at the next engagement point. The position distribution of the meshing points comprises a synchronous type and a stepping type, and both the positive side and the negative side can be meshed.

The mechanical overload protection can cut off the power source instantly, and the residual torque can be changed into zero within 1-3 milliseconds, so that the stress parts of the slag conveyor can be well protected and are not damaged.

The above detailed description of the embodiments of the present invention has been provided, but the present invention is not limited to the above described embodiments. Any equivalent modifications and substitutions are within the scope of the present invention for those skilled in the art. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims

1. The utility model provides a lower back chain scraper blade dragveyer which characterized in that: the slag cleaning device comprises a tail chain wheel, a chain plate, a chain, a scraper, a motor, a head chain wheel, a slag outlet, a shell and a slag sweeping plate, wherein the tail chain wheel and the head chain wheel are wrapped by the chain; a chain plate is fixed on the chain; a scraper is supported on the chain plate; the upper end of the inclined section of the shell is provided with a motor connected with the head chain wheel; a slag sweeping plate which is contacted with the chain is arranged on the upper side of the head chain wheel; a slag outlet is arranged below the upper end of the shell; the motor protection form is mechanical overload protection.

2. The lower return chain scraper slag conveyor of claim 1, wherein: the slag sweeping plate comprises a main body part, a flexible part, a rubber plate and a bolt.