CN111874541A - Embedded scraper coal feeder with automatic chain tensioning function - Google Patents

Abstract

The invention discloses a buried scraper coal feeder with automatic chain tensioning function, which comprises a regulating motor, a driving gear, a winding gear, a wire rope and a controller; the output shaft of the regulating motor is connected with the driving shaft of the driving gear, The driving gear is matched with the winding gear, one end of the wire rope is wound on the winding gear, and the other end of the wire rope is connected to the connecting shaft of the driven wheel in the buried scraper coal feeder. Tension sensor, wherein the output end of the tension sensor is connected with the input end of the controller, and the output end of the controller is connected with the control end of the regulating motor. The coal feeder has the function of automatic chain tension, which can effectively avoid the slack belt of the chain. various issues.

Description

A buried scraper coal feeder with automatic chain tensioning function

technical field

The invention relates to a buried scraper coal feeder, in particular to a buried scraper coal feeder with a chain automatic tensioning function.

Background technique

Buried scraper coal feeder is a coal feeding equipment in the pulverizing system of thermal power plants. It can send the raw coal into the steel ball coal mill, medium speed coal mill and fan coal mill in a continuous and uniform way to make pulverized coal for power station boiler.

The buried scraper coal feeder is mainly composed of front and rear sprockets and a transmission chain hanging on the two sprockets. There are multiple scrapers distributed at equal distances on the chain.

The buried scraper coal feeder uses the coal under the action of its own friction force and the dragging force of the scraper chain to form a continuous coal seam flow in the box along the movement direction of the scraper chain, and continuously flows from the coal inlet to the coal outlet. port (into the coal mill) to achieve continuous, uniform and quantitative material conveying tasks.

After the buried scraper coal feeder has been running for a period of time, it is necessary to check whether the tension of its chain is appropriate. Driven by the drive motor, the scraper pushes the coal pile forward and bears a large reverse force. After long-term operation, the chain buckle of the iron chain will inevitably be flattened and deformed in the length direction. There are hundreds of chain buckles on a transmission chain. If each chain buckle is slightly stretched and elongated, the length of the entire chain will increase considerably. The role of loose chains in conveying coal is greatly reduced, and it is difficult to meet the requirements of continuous pulverized coal grinding by coal mills. Therefore, after the transmission chain has been used for a period of time, the tension degree must be re-checked and re-adjusted, which is a necessary item for regular maintenance of the buried scraper coal feeder.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and to provide a buried scraper coal feeder with automatic chain tensioning function. various problems.

In order to achieve the above purpose, the buried scraper coal feeder with automatic chain tensioning function according to the present invention includes a regulating motor, a driving gear, a winding gear, a wire rope and a controller;

The output shaft of the adjusting motor is connected with the driving shaft of the driving gear, the driving gear is matched with the winding gear, one end of the wire rope is wound on the winding gear, and the other end of the wire rope is connected to the connection of the driven wheel in the buried scraper coal feeder On the shaft, the wire rope is provided with a tension sensor for detecting the tension information on the wire rope, wherein the output end of the tension sensor is connected with the input end of the controller, and the output end of the controller is connected with the control end of the regulating motor.

Also includes a bird catcher that mates with the winding gear.

It also includes a spring, wherein one end of the spring is fixed, and the other end of the spring is connected with the bird guard.

It also includes a buffer spring arranged in the middle of the wire rope.

Also included is a pulley, wherein the wire rope is passed around the pulley.

The present invention has the following beneficial effects:

When the buried scraper coal feeder with automatic chain tensioning function of the present invention is in operation, the tension sensor detects the tension on the wire rope to determine whether the chain needs to be tensioned. When the chain needs to be tensioned, the motor drives the gear And the winding gear retracts the wire rope, so that the chain in the coal feeder is tensioned by the buried scraper, which effectively avoids various problems caused by chain slack. The operation is convenient, simple, and extremely practical. The trouble of manual operation and regular maintenance, the adjustment of the chain tension is more timely and accurate, and it has the function of breaking the chain to effectively ensure the safety of the equipment. At the same time, the mechanical structure is simple, the detection and adjustment principle is reliable, the overall cost of the equipment is low, and it has significant advantages. market promotion and application prospects.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

Among them, 1 is the adjusting motor, 2 is the controller, 3 is the pulley, 4 is the driving gear, 5 is the winding gear, 6 is the bird blocking, 7 is the wire rope, 8 is the spring, 9 is the tension sensor, 10 is the buffer spring, 11 is the buried scraper coal feeder.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Referring to Figure 1, the buried scraper coal feeder with automatic chain tensioning function according to the present invention includes an adjusting motor 1, a driving gear 4, a winding gear 5, a wire rope 7 and a controller 2; the output shaft of the adjusting motor 1 is connected to a The drive shaft of the drive gear 4 is connected, the drive gear 4 is matched with the winding gear 5, one end of the wire rope 7 is wound on the winding gear 5, and the other end of the wire rope 7 is connected to the driven wheel of the buried scraper coal feeder 11. On the connecting shaft, the wire rope 7 is provided with a tension sensor 9 for detecting the tension information on the wire rope 7, wherein the output end of the tension sensor 9 is connected with the input end of the controller 2, and the output end of the controller 2 is connected with the adjusting motor 1. connected to the control terminal.

The present invention also includes a bird blocking 6 matched with the winding gear 5; the present invention also includes a spring 8, wherein one end of the spring 8 is fixed, and the other end of the spring 8 is connected with the blocking bird 6; 7. The buffer spring 10 in the middle; the present invention also includes a pulley 3, wherein the wire rope 7 goes around the pulley 3.

The working principle of the present invention is:

By adjusting the motor 1 as the power source of the whole automatic tensioning device, the output end of the controller 2 is connected with the control end of the adjusting motor 1, and the adjusting motor 1 is controlled by the controller 2 to complete the functions of starting, stopping and running. The adjusting motor 1 is connected with the driving gear 4 through the transmission shaft, and the driving gear 4 is closely meshed with the winding gear 5 to realize the transmission of the winding gear 5 .

The blocking bird 6 cooperates with the winding gear 5, so that the winding gear 5 rotates in one direction. In addition, one end of the spring 8 is fixed, and the other end of the spring 8 is connected with the blocking bird 6. When the winding gear 5 rotates to any position , even if the adjusting motor 1 stops, it is subjected to pulling force, but blocked by the blocking bird 6, it can still maintain its original position, and does not rotate in the opposite direction. The function of the spring 8 is to ensure that the blocking bird 6 is closely meshed with the winding gear 5 at all times, and the winding gear 5 is stuck so that it cannot rotate in the opposite direction, thereby maintaining the tensioned position. One end of the wire rope 7 is wound around the winding gear 5. The other end of the wire rope 7 is fixed on the connecting shaft of the driven wheel in the buried scraper coal feeder 11, and the middle of the wire rope 7 is provided with a tension sensor 9 and a buffer spring 10, wherein the output end of the tension sensor 9 is connected to the controller 2 Connected, the controller 2 detects the tension on the wire rope 7 through the tension sensor 9 .

During operation, the buried scraper coal feeder 11 is put into normal operation after the initial adjustment, and put into the automatic chain tensioning device after running for 1 hour. The tension sensor 9 detects the tension force at this time as the original value F ₀ , and sends it to the controller 2 for storage.

After the buried scraper coal feeder 11 runs for a long time, the chain buckle is flattened, the chain becomes longer as a whole, and the tension naturally decreases. At this time, the measurement results of the tension sensor 9 can be displayed. When the tension sensor 9 measures in real time When F _t <F ₀ -10, that _is , the tension force is reduced by more than 10N, and this reduction is maintained for more than 8 hours, the controller 2 considers that the chain needs to be tensioned.

The controller 2 controls the adjustment motor 1 to rotate, and the adjustment motor 1 drives the drive gear 4 and the winding gear 5 to rotate, and finally the buffer spring 10 is tensioned again. When the tension value detected by the tension sensor 9 is F _t =F ₀ , the tension is After the force adjustment is completed, the controller 2 controls the adjustment motor 1 to turn off, and the blocking bird 6 is stuck on the teeth of the winding gear 5 to ensure that the adjusted winding gear 5 does not rotate in the opposite direction, and the position is self-maintaining.

During the whole life operation of the equipment, the above-mentioned tensioning operation will be automatically performed many times. When the end of the equipment life is reached, the value detected by the tension sensor 9 can also be used as an alarm for chain breakage. During the operation of the chain, if the chain buckle is disengaged, the tension on the chain will be quickly reduced to near 0, at this time, the controller 2 will issue an alarm of "chain breakage", and send a signal to the buried scraper at the same time. The coal feeder 11 stops the motor of the coal feeder to protect the equipment.

Claims (5)

1. An embedded scraper coal feeder with a chain automatic tensioning function is characterized by comprising an adjusting motor (1), a driving gear (4), a winding gear (5), a steel wire rope (7) and a controller (2);

the output shaft of adjusting motor (1) is connected with the drive shaft of drive gear (4), drive gear (4) cooperate with wire winding gear (5), the one end of wire rope (7) twines on wire winding gear (5), the other end of wire rope (7) is connected on the connecting axle of following the driving wheel in buried scraper coal feeder (11), be provided with on wire rope (7) and be used for detecting tensile force sensor (9) of wire rope (7) pull-up force information, wherein, the output of tensile force sensor (9) is connected with the input of controller (2), the output of controller (2) is connected with the control end of adjusting motor (1).

2. The underground scraper coal feeder with automatic chain tensioning according to claim 1, characterized in that it further comprises a bird stop (6) cooperating with the winding gear (5).

3. The coal face feeder with chain automatic tensioning function according to claim 1, characterized by further comprising a spring (8), wherein one end of the spring (8) is fixed, and the other end of the spring (8) is connected with the bird stopper (6).

4. The coal submerged scraper feeder with automatic chain tensioning function according to claim 1, further comprising a buffer spring (10) disposed in the middle of the wire rope (7).

5. The underground scraper coal feeder with automatic chain tensioning according to claim 1, characterized by further comprising a pulley (3), wherein a wire rope (7) is passed around the pulley (3).

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