CN216836127U - Coal feeder blanking pipe headstock gear - Google Patents

Abstract

The utility model discloses a coal feeder blanking pipe opening and closing device, which comprises a spile door and a blanking pipe, wherein the spile door comprises a gearbox body and a valve seat fixedly arranged on one side of the gearbox body, and also comprises a conical collection cover and a recovery pipe, the end with a larger opening of the conical collection cover is communicated with the lower end of the gearbox body, the end with a smaller opening of the conical collection cover is communicated with the upper end of the recovery pipe, and the lower end of the recovery pipe is communicated with the blanking pipe; at least one air inlet is arranged at the upper end of the gear box body, and each air inlet is connected with a compressed air pipe. The utility model has the advantages of it is following: the slightly opened air inlet valve enables the interior of the gearbox body to keep a micro positive pressure greater than that of the blanking pipe, and the packing is sealed in a gas mode, so that the adverse effect of pulverized coal on a gear and a rack is reduced; the high-flow-rate compressed air in the compressed air pipe blows the pulverized coal at the bottom of the conical collecting cover into the blanking pipe, and simultaneously blows the pulverized coal on the gear and the rack, so that the workload of cleaning the pulverized coal in the gear box body is reduced, and the normal production is not influenced.

Description

Coal feeder blanking pipe headstock gear

The technical field is as follows:

the utility model relates to a headstock gear field is carried to powder material, in particular to feeder blanking pipe headstock gear.

Background art:

the coal feeder spile door is a device which is arranged on a coal feeder blanking pipe of a thermal power plant and is used for adjusting the coal conveying amount, and mainly comprises a gear box body and a valve seat which is fixedly arranged on one side of the gear box body; a strip-shaped through hole is formed in one side, close to the valve seat, of the gear box body, a motor is fixedly arranged outside the gear box body, a gear, a rack and an inserting plate are arranged in the gear box body, the motor is in driving connection with the gear, the gear is meshed with the rack, the rack is fixedly connected with one end of the inserting plate, and the other end of the inserting plate penetrates out of the strip-shaped through hole and is sealed with the strip-shaped through hole through a packing; the inserting plate door is connected with the blanking pipe through a valve body; when the flashboard door works, the gear is driven by the motor to rotate, the extension of the flashboard is adjusted, the purpose of adjusting the coal conveying quantity is achieved, and the flashboard door has the advantages of simple and compact structure, flexibility in adjustment, flexibility in operation and the like.

However, the prior coal feeder spile door has the following problems:

1. after the inserting plate of the inserting plate door frequently acts, a packing for sealing the inserting plate is worn by entrained coal dust, a gap between the inserting plate and the packing is increased, and a large amount of coal dust in a valve seat enters a gear box, so that on one hand, meshing parts of a gear and a rack are jammed, and the opening degree of the inserting plate door is difficult to adjust; on the other hand, when the coal accumulation is serious, the coal accumulation jacks up the rack, the gear and the rack cannot be tightly meshed, so that the gear skipping phenomenon is caused, and the opening degree of the inserting plate door is regulated to be out of order;

2. when the pulverized coal in the gear box is cleaned, the inserting plate door and the blanking pipe connected with the inserting plate door need to be completely isolated, the box cover of the gear box is disassembled, the pulverized coal settled at the bottom of the rack, the gear and the gear box body can be cleaned, and the workload for cleaning the pulverized coal in the gear box is large, so that the normal production is influenced.

The utility model has the following contents:

an object of the utility model is to provide a feeder blanking pipe headstock gear.

The utility model discloses by following technical scheme implement: a blanking pipe opening and closing device of a coal feeder comprises a blanking pipe and a plug board door, wherein the plug board door comprises a gear box body and a valve seat fixedly arranged on one side of the gear box body, and a strip-shaped through hole is formed in one side, close to the valve seat, of the gear box body; a motor is fixedly arranged outside the gear box body, a gear, a rack and an inserting plate are arranged in the gear box body, the motor is in driving connection with the gear, the gear is meshed with the rack, the rack is fixedly connected with one end of the inserting plate, and the other end of the inserting plate penetrates out of the strip-shaped through hole and is sealed with the strip-shaped through hole through a packing; the spile door is connected with the blanking pipe through the valve seat,

the gear box is characterized by further comprising a conical collecting cover and a recovery pipe, wherein the larger end of the opening of the conical collecting cover is communicated with the lower end of the gear box body, the smaller end of the opening of the conical collecting cover is communicated with the upper end of the recovery pipe, and the lower end of the recovery pipe is communicated with the blanking pipe. When the packing wears and teares the buggy and gets into in the gear box body, the buggy falls into the bottom that the cover was collected to the toper to retrieve to the blanking pipe in through the recovery tube, avoid the buggy to cause the influence to gear and rack.

At least one air inlet is formed in the upper end of the gear box body, and each air inlet is connected with a compressed air pipe. Compressed air is introduced into the gear box body through a compressed air pipe, so that the pressure in the gear box body is kept to be greater than the micro positive pressure of the blanking pipe, the effect of air sealing packing is achieved, and pulverized coal entering the gear box body is reduced.

Furthermore, a recovery valve is arranged on the recovery pipe. And opening a recovery valve after the operation for a period of time, so that the pulverized coal in the conical collection cover is recovered to the blanking pipe.

Furthermore, each compressed air pipe is provided with an air inlet valve. On the one hand slightly opens the admission valve, makes the internal pressure-fired that keeps being greater than the blanking pipe of gear box, plays the effect of gas seal packing, and on the other hand is after operation a period, opens the recovery valve in proper order, opens the admission valve fully, when sweeping gear and rack, blows in the blanking pipe with the buggy that the cover was collected to the toper in.

The utility model has the advantages of it is following:

1. the utility model discloses be connected with compressed air pipe and admission valve in gear box body upper end, when the picture peg door was thrown, open the admission valve a little, make the gear box body keep being greater than the pressure-fired that blanking was managed, carry out gas seal to the packing, even if after the picture peg frequently moved and leads to the packing wearing and tearing, because keep the pressure-fired in the gear box body, still can reduce the buggy volume that gets into in the gear box body, reduce the harmful effects that the buggy caused gear and rack;

2. the utility model is connected with a conical collecting cover at the lower end of the gear box body and a recovery pipe which is communicated with the conical collecting cover and the blanking pipe, and the recovery pipe is provided with a recovery valve, when a small amount of coal powder enters the gear box body, most of the coal powder is settled at the bottom of the conical collecting cover, thereby further reducing the adverse effect of the coal powder on the gear and the rack; when the pulverized coal in the gear box body needs to be cleaned, the recovery valve and the air inlet valve are fully opened, the pulverized coal at the bottom of the conical collection cover is blown into the blanking pipe by high-flow-rate compressed air, and the pulverized coal deposited on the gear and the rack is blown and swept, so that the workload for cleaning the pulverized coal in the gear box body is greatly reduced, an isolation flashboard door and a blanking pipe are not needed, and normal production is not influenced.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a coal feeder blanking pipe opening and closing device of the present invention;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

In the figure, a blanking pipe 1, a gear box body 2, a valve seat 3, a strip-shaped through hole 4, a gear 5, a rack 6, an inserting plate 7, a packing 8, a conical collecting cover 9, a recovery pipe 10, a recovery valve 11, an air inlet 12, a compressed air pipe 13 and an air inlet valve 14 are arranged.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-2, an opening and closing device for a blanking pipe 1 of a coal feeder comprises the blanking pipe 1 and a spile door, wherein the spile door comprises a gear box body 2 and a valve seat 3 fixedly arranged on one side of the gear box body 2, and a strip-shaped through hole 4 is formed in one side of the gear box body 2 close to the valve seat 3; a motor (not shown) is fixedly arranged outside the gear box body 2, a gear 5, a rack 6 and an inserting plate 7 are arranged in the gear box body 2, the motor is in driving connection with the gear 5, the gear 5 is meshed with the rack 6, the rack 6 is fixedly connected with one end of the inserting plate 7, and the other end of the inserting plate 7 penetrates out of the strip-shaped through hole 4 and is sealed with the strip-shaped through hole 4 through a packing 8; the inserting plate door is connected with the blanking pipe 1 through a valve seat;

still collect cover 9 and recovery tube 10 including the toper, the great one end of opening of cover 9 is collected to the toper and the lower extreme intercommunication of gearbox casing 2, and the less one end of opening of cover 9 is collected to the toper communicates with the upper end of recovery tube 10, and the lower extreme and the blanking pipe 1 intercommunication of recovery tube 10 are equipped with recovery valve 11 on the recovery tube 10. When packing 8 wearing and tearing cause the buggy to get into in the gear box 2, the buggy falls into the lower extreme of toper collection cover 9, and recovery valve 11 is opened to the intermittent type, makes the buggy retrieve to blanking pipe 1 through recovery tube 10 in, avoids the buggy to cause the influence to gear 5 and rack 6.

Two air inlets 12 are opened to the upper end of gear box 2, and every air inlet 12 is connected with compressed air pipe 13, all is equipped with admission valve 14 on every compressed air pipe 13. On one hand, the air inlet valve 14 is opened slightly, compressed air is introduced into the gear box 5, so that the interior of the gear box body 2 is kept to be larger than the micro positive pressure of the blanking pipe 1, and the effect of sealing the packing 8 by gas is achieved; on the other hand, after the operation is carried out for a period of time, the recovery valve 11 and the two air inlet valves 14 are opened in sequence, and the coal dust in the conical collection cover 9 is blown into the blanking pipe 1 while the gear 5 and the rack 6 are purged by high-flow-rate compressed air.

The working principle is as follows:

after the plug board door of the coal feeder is put into use, slightly opening an air inlet valve 14, and introducing compressed air into the gear box body 2 through a compressed air pipe 13 to ensure that the interior of the gear box body 2 keeps a micro positive pressure greater than that of the blanking pipe 1, so as to play a role in sealing a packing 8 by gas; after long-time use, if the packing 8 is worn, part of the pulverized coal still enters the gear box body 2 through a gap between the inserting plate 7 and the packing 8, and most of the pulverized coal sinks to the lower part of the conical collecting cover 9 under the action of gravity, so that the gear 5 and the rack 6 are prevented from being influenced.

After the operation is carried out for a period of time, the recovery valve 11 and the two air inlet valves 14 are opened in sequence, so that high-flow-rate compressed air enters the gear box body 2, on one hand, the pulverized coal deposited on the gear 5 and the rack 6 is swept, on the other hand, the pulverized coal accumulated at the lower part of the conical collection cover 9 is blown into the blanking pipe 1, and the adverse effect of the pulverized coal on the gear 5 and the rack 6 is reduced as much as possible; after the purging is finished, the recovery valve 11 is closed, the air inlet valve 14 is slightly opened, and the micro positive pressure in the gear box body 2 which is larger than the blanking pipe 1 is continuously kept.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A blanking pipe opening and closing device of a coal feeder comprises a spile door and a blanking pipe, wherein the spile door comprises a gearbox body and a valve seat fixedly arranged on one side of the gearbox body, and a strip-shaped through hole is formed in one side, close to the valve seat, of the gearbox body; a motor is fixedly arranged outside the gear box body, a gear, a rack and an inserting plate are arranged in the gear box body, the motor is in driving connection with the gear, the gear is meshed with the rack, the rack is fixedly connected with one end of the inserting plate, and the other end of the inserting plate penetrates out of the strip-shaped through hole and is sealed with the strip-shaped through hole through a packing; the spile door is connected with the blanking pipe through the valve seat, and is characterized in that,

the gear box is characterized by further comprising a conical collecting cover and a recovery pipe, wherein the larger end of the conical collecting cover is communicated with the lower end of the gear box body, the smaller end of the conical collecting cover is communicated with the upper end of the recovery pipe, and the lower end of the recovery pipe is communicated with the blanking pipe;

at least one air inlet is formed in the upper end of the gear box body, and each air inlet is connected with a compressed air pipe.

2. The opening and closing device for the blanking pipe of the coal feeder as claimed in claim 1, wherein the recovery pipe is provided with a recovery valve.

3. The on-off device for the blanking pipe of the coal feeder as claimed in claim 1, wherein each compressed air pipe is provided with an air inlet valve.

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