CN212923653U - Synchronous lifting device of coal conveying belt and guide chute based on mechanical principle - Google Patents

Abstract

The utility model provides a coal conveying belt and baffle box synchronous lifting device based on mechanical principle. The utility model discloses a can provide lifting power's coal unloading dolly and orbit and coal conveying belt baffle box and synchronous elevating gear thereof, coal conveying belt baffle box includes the fixed part and can be along with the part of belt lift, the coal unloading dolly is used for providing lifting power for this belt baffle box elevating gear, its car body welding has the support that is used for promoting baffle box elevating gear baffle, the baffle breaks away from the bolt at the dolly in-process that gos forward, fixed winding has wire rope on the baffle, wire rope passes through the assembly pulley and connects on lifting baffle box. The utility model discloses based on the theory of mechanics, can make the baffle box on the belt at the better laminating of the in-process that coal conveying belt goes up and down, realize the good leakproofness of baffle box to install air water double-fluid nozzle and dry fog nozzle additional on the baffle box, through the water smoke of different granularities, reach the dust removal and press down the effect of dirt.

Description

Synchronous lifting device of coal conveying belt and guide chute based on mechanical principle

Technical Field

The utility model relates to a power plant's coal conveying system technical field especially relates to a coal conveying belt and baffle box synchronous lifting device based on theory of mechanics.

Background

The fuel coal conveying system of the power plant can generate a great amount of coal dust in the coal transportation process, and the flying dust can seriously pollute the working site and the surrounding environment. A part of coal types represented by lignite generate a large amount of fine coal dust in the transportation process, and directly threaten safe production and harm physical and psychological health of workers. Due to the large deviation of the coal used from the designed coal, the original design has not been able to meet the current need for dust suppression. The coal conveying belt guide chute in the prior art is nearly 3.2 meters long, the belt blanking height can reach 8 meters, strong induced wind generated by blanking can not effectively reduce the wind speed at a short distance of the guide chute, and further the dust amount at the outlet of the guide chute is large, and the pulverized coal leaks from three sides of the guide chute, so that the dust overflow amount can be reduced by prolonging the guide chute.

Influenced by the field device layout, be close to this baffle box when the coal unloading dolly adds the storehouse, the coal unloading dolly trailer can lift up the belt gradually at the in-process of walking, and the simple extension of belt baffle box can't realize, and the baffle box extension must can be along with the synchronous lift of belt to all arrive better sealing capacity at two extreme positions, will avoid complicated electric and control system moreover, consequently, the design that realizes coal conveying belt and the synchronous elevating gear of baffle box based on mechanical principle becomes research and development key.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, a synchronous lifting device for a coal belt and a material guide chute based on mechanical principle is provided. The utility model discloses a technical means as follows:

a coal conveying belt and guide chute synchronous lifting device based on a mechanical principle comprises a coal unloading trolley capable of providing lifting power, a running track of the coal conveying belt, a coal conveying belt guide chute and a synchronous lifting device of the coal conveying belt guide chute, wherein the coal conveying belt guide chute comprises a fixed part and a part capable of lifting along with a belt, the fixed part of the guide chute and the liftable part of the guide chute are connected through hinges, the liftable part of the coal conveying belt guide chute completes a synchronous lifting function through a bolt traction device arranged on the inner side of the running track of the coal unloading trolley, the bolt traction device comprises a rod with a hook and a bolt chute, the bolt chute is welded on the inner side of the running track of the coal unloading trolley, a blocking piece used for pushing the rod with the hook is welded on a trolley body of the coal unloading trolley, and the rod with the hook is inserted into the bolt chute in; in a second state of the advancing process of the trolley, the rod with the hook and the coal unloading trolley travel together and are separated from the bolt groove; the tail part of the rod with the hook is connected with one end of a traction steel wire rope, the traction steel wire rope pulls the liftable part of the guide chute to synchronously lift through the pulley block along with the advance of the coal unloading trolley, when the coal unloading trolley retreats, the guide chute is influenced by gravity, the guide chute falls, the steel wire rope is tensioned to tightly clamp the rod with the hook and the blocking piece until the rod with the hook returns to the first state position, and the rod with the hook is separated from the blocking piece of the coal unloading trolley to finish one-time lifting operation.

Furthermore, top pulleys matched with the number of the bottom pulleys in the pulley block are further arranged above the guide chute, the top pulleys are fixed on the support, and the bottom pulleys and the top pulleys are connected through the steel wire rope in a winding mode.

Further, the inside of baffle box is equipped with the fender curtain mechanism that the multichannel is used for blockking the coal dust that dashes out from the baffle box, fender curtain mechanism passes through splint and bolt fastening and is in baffle box top position, fender curtain mechanism includes a plurality of columnar rubber strips.

Furthermore, a safety device is arranged above the guide chute, and the guide chute safety device is used for connecting the lifting part of the guide chute with the bracket above the guide chute by using a steel wire rope.

Furthermore, sealing mechanisms are arranged on two sides of the guide chute, specifically, the guide chute sealing skirt edges are fixed on two sides of the guide chute through buckles and fixing plates.

Furthermore, a dry fog dust removal nozzle and a double-fluid fan-shaped nozzle are arranged inside the guide chute.

Furthermore, the fixed part and the lifting part of the guide chute are connected and sealed through fireproof and dustproof cloth.

The utility model discloses based on the mechanical principle, designed the synchronous elevating gear of one set of coal conveying belt and baffle box for the belt baffle box is around the belt goes up and down, and baffle box edge distance belt can both maintain more 200mm, does not have the touching all the time between belt and the baffle box, realizes the good edge seal nature of baffle box, and installs air water double-fluid nozzle and dry fog nozzle additional on the baffle box, through the water smoke of different granularities, reaches the dust removal and presses down the effect of dirt.

Drawings

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

Fig. 1 is a side view of an embodiment of the present invention.

Fig. 2 is a top view of an embodiment of the present invention.

Fig. 3 is a front view of the embodiment of the present invention.

Fig. 4 is a schematic view of the baffle box water spraying device of the present invention.

Fig. 5 is a schematic view of the distance and force saving principle of the movable pulley of the present invention.

In the figure: 1. a coal unloading trolley; 2. a coal conveying belt; 3. a baffle curtain of the material guide chute; 4. a material guide groove lifting part; 5. connecting a hinge; 6. a bolt pulling device; 7. the coal unloading trolley runs on a track; 8. a first direction-changing pulley; 9. a wire rope; 10. a second direction-changing pulley; 11. a guide chute top plate pulley block; 12. a pulley block above the material guide chute; 13. a pulley block bracket; 14. a guide chute is used for balancing weight; 15. a material guide chute safety device; 16. the guide chute sealing skirt edge; 17. a dry fog dust removal nozzle; 18. a dual fluid fan nozzle; 19. fireproof cloth; 20. a material guide groove fixing part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the embodiment discloses a synchronous lifting device of a coal conveying belt and a material guide chute based on a mechanical principle, which comprises a coal unloading trolley 1 capable of providing lifting power, a running rail 7 thereof, a coal conveying belt material guide chute and a synchronous lifting device thereof, wherein the coal conveying belt material guide chute comprises a fixed part 20 and a lifting part 4 capable of lifting along with a coal conveying belt 2, the fixed part 20 of the material guide chute and the lifting part 4 are connected through a hinge, the lifting part completes the synchronous lifting function through a bolt traction device arranged on the inner side of the running track of the coal unloading trolley, the fixed part of baffle box is original baffle box, and the liftable part of baffle box is original baffle box extension part, (in this embodiment, its quality is 200kg, and it is made through 3mm thick plate cutting welding) between connect through connection hinge 5. The inner side of the running track of the coal unloading trolley is provided with a bolt traction device 6, the bolt traction device comprises a rod with a hook and a bolt groove, the bolt groove is welded on the inner side of the running track of the belt coal unloading trolley, a baffle corresponding to the rod with the hook is welded on a trolley body of the coal unloading trolley, the baffle is inserted into the bolt in a first state of the advancing process of the trolley, and the rod with the hook and the coal unloading trolley travel together and are separated from the bolt groove in a second state of the advancing process of the trolley; the tail part of the rod with the hook is connected with one end of a traction steel wire rope 9, the traction steel wire rope pulls the liftable part of the guide chute to synchronously lift through the pulley block along with the advance of the coal unloading trolley, when the coal unloading trolley retreats, the guide chute is influenced by gravity, the guide chute falls, and the steel wire rope is tensioned to tightly clamp the rod with the hook and the blocking piece until the rod with the hook returns to the first state position, and the rod with the hook is separated from the blocking piece of the coal unloading trolley, so that one-time lifting operation is completed.

In this embodiment, the direction-changing pulley is welded on the belt support, 180-degree direction changing of the steel wire rope is realized through the first direction-changing pulley 8 and the second direction-changing pulley 10, the pulley bears 300kg, the steel wire rope is 4mm, and the steel wire rope bears 400 kg.

In the embodiment, the six hinges with the length of 150mm and the bearing capacity of 50kg are respectively welded with the two parts of the material guide groove, so that the flexible opening and closing function is achieved.

In the embodiment, a guide chute top plate pulley block 11 composed of 8 pulleys is installed on the guide chute top plate, the pulleys are all transversely arranged, and the pulley block is connected with the liftable portion of the guide chute through a self-made hinge device to realize automatic centering in operation with the pulley block on the upper portion of the guide chute. Two 8mm strip-shaped thick iron plates with the length of 800mm and the width of 100mm are selected as the pulley block hinge, iron pipes with the length of 80mm are welded to the iron plates on two sides at intervals, and the iron pipes are inserted together through another iron pipe to form the hinge structure.

In this embodiment, the bolt material is DN 25's white steel tube, when the coal unloading dolly walks to the baffle box opposite direction, the belt descends along with the walking of coal unloading dolly, because the wire rope is taut always to the gravity of baffle box and counter weight, the baffle begins to hang on coal unloading dolly support always because wire rope's pulling force, walk along with the dolly, meet the bolt on the dolly track at the baffle, insert the bolt, no longer follow the dolly walking, baffle box and belt also fall down completely this moment, realize the better laminating of liftable part and coal conveying belt of baffle box.

And pulley blocks 12 above the material guide chute, which are matched with the number of the pulley blocks on the top plate of the material guide chute, are arranged above the material guide chute, the pulley blocks on the top part are fixed on the pulley block support 13, and the pulley blocks 11 on the top plate of the material guide chute and the pulley blocks 12 above the material guide chute are connected by winding steel wire ropes. Specifically, 8 pulleys above the material guide chute: 8 pulleys are welded on an iron plate with the thickness of 8mm, and the iron plate is welded on a 1m I-shaped steel bracket through the same hinge. In this embodiment, the pulley block support welded fastening is in factory building two-layer floor.

In the embodiment, the steel wire rope plays a role in traction of the material guide groove, and the pulley block plays a role in distance saving and tension saving. In consideration of the lifting process of the guide chute, in order to prevent the abrasion of the steel wire rope and the pulleys caused by the change of the angle of the pulley block in traction, the hinge can realize the automatic centering of the two groups of pulley blocks in operation.

Through field measurement, the walking distance of the coal unloading trolley is 7.5 meters, and the liftable part of the guide chute needs to be lifted by 0.47 meter. As shown in fig. 5, the pull rope of the weight is pulled from point a to point B, and the distance is AB, but the lifting height of the weight is AB/2; and the weight is G, the force F with which the mechanism pulls it is G/2. Based on the theory, 2 groups of 16 pulleys are selected, namely the walking length of the traction end is about 16 times of the lifting height of the guide chute, the field design requirement is basically met, meanwhile, the pulling force of the traction end is only 1/16 of the weight of the guide chute, the walking power of the coal unloading trolley can be effectively utilized for traction, and the guide chute counterweight 14 can be additionally arranged on the top plate of the lifting guide chute, so that when the coal conveying belt falls along with the coal unloading trolley, the steel wire rope can be tensioned.

In a preferred embodiment, a baffle box curtain 3 for blocking the coal dust flushed from the guide box is arranged inside the guide box, the baffle box curtain of the baffle box machine is fixed at the outlet position of the guide box through a clamping plate and a bolt, and the baffle box curtain of the guide box comprises a plurality of strip-shaped rubber strips, such as noodles.

In order to prevent the newly-increased baffle box because reasons such as pulley damage, wire rope fracture or hinge damage drop, fish tail belt, damage equipment. In a preferred embodiment, the guide chute upper bracket is provided with a guide chute safety device 15, one end of the guide chute device is tensioned by a steel wire rope through a hanging ring, and the other end of the guide chute device is fixed on the guide chute upper bracket through another hanging ring, in this embodiment, the steel wire rope of the guide chute safety device bears the tension of 600 kg.

Sealing mechanisms are arranged on two sides of the guide chute, specifically a guide chute sealing skirt 16, and the guide chute sealing skirt is fixed on two sides of the guide chute through a buckle and a fixing plate. The sealed shirt rim of baffle box adopts wear-resisting fire-retardant rubber to make, and the shirt rim is fixed in the baffle box both sides with self-control buckle and fixed plate, and about 500mm is long, extends to the belt on from the baffle box always, realizes the sealed to the baffle box both sides.

As shown in fig. 4, the inside of the guide chute is provided with a dry mist dust removing nozzle 17 and a two-fluid fan nozzle 18. The two are respectively taken from domestic water and plant air, and the actual flow is controlled by a flow regulating valve. The air pipe is filled with plant air 680kpa all the time, the water pump and the flow regulating valve are controlled remotely by the control room and are started together with the belt, and the water spraying of the guide chute is realized. The front parts of the gas path distributor and the water path distributor are both 4-minute white steel pipes, and the rear parts of the distributors are 2-minute anti-corrosion hoses.

Specifically, a dry mist dust removal nozzle: the spraying angle is 60 degrees, the model SV882 is selected, the air pressure is 5.2bar, the water pressure is 1.2bar, the gas consumption is 240L/min, the water consumption is 0.746L/min, a hole with the diameter of 15mm is arranged on the guide chute, the nozzle is arranged on the guide chute through the hole, and the nozzle is arranged at two sides of the baffle curtain in the new extension guide chute.

Two-fluid fan nozzle: the air pressure is 0.3Mpa, the water pressure is 0.1Mpa, the gas consumption is 40L/min, the water consumption is 0.23L/min, the spraying shape is a sector of 90 degrees, the fog amount and angle can be adjusted through the tail adjusting mechanism, and the spraying coverage is larger. The guide chute is provided with a hole with the diameter of 15mm, and the nozzle is arranged on the guide chute through the hole.

The lifting part of the guide chute can generate a gap with the fixed part of the original guide chute due to lifting as a preferred embodiment, and the lifting part of the guide chute and the fixed part of the original guide chute are connected and sealed by fireproof cloth 19, so that the sealing and dust removal can be ensured while the fireproof effect is achieved.

In the embodiment, through observation of the on-site coal feeding condition, the belt guide chute is prolonged by 2m, so that a good effect on-site belt dust suppression is achieved. Through field measurement, the coal unloading trolley travels towards the tail direction of the belt, the belt level is just lifted to the maximum angle until the belt is completely lifted, the travel distance of the coal unloading trolley is 7.5m, the outlet position of the guide chute, which is 2m longer, is lifted by about 0.5m in the process, and the guide chute is attached to the belt without dynamic friction.

The specific workflow of this embodiment is as follows: the motor walking power of the coal unloading trolley is utilized, the bolt is pushed to pull the rod with the hook in the process that the coal unloading trolley walks towards the guide chute, and then the steel wire rope connected with the tensioning device is pulled in a turning way through the first turning pulley and the second turning pulley to drive the pulley block above the guide chute and the pulley block on the top plate of the guide chute, so that the liftable part of the guide chute is driven to lift along with the lifting of the belt, the guide chute can be attached to the belt all the time, the distance between the two sides of the guide chute and the belt is 200mm, and the guide chute and the belt are not in contact; and when the coal unloading trolley travels in the opposite direction of the guide chute, the steel wire rope is tensioned by utilizing the gravity of about 300KG of the liftable part of the guide chute, so that the rod with the hook of the bolt traction device is tightly hung on the baffle of the coal unloading trolley, the liftable part of the guide chute is always attached to the belt along with the descending of the belt, the distance between the two sides of the guide chute and the belt is 200mm, and the two parts are not in contact. When the coal conveying belt is in coal conveying operation, the gas path flow regulating valve, the water path pump and the flow regulating valve of the guide chute water spraying device can be remotely controlled and started in the control room, so that the nozzles in the guide chute spray water mist with different particle sizes, and the dust suppression effect is enhanced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (7)

1. A coal conveying belt and guide chute synchronous lifting device based on a mechanical principle is characterized by comprising a coal unloading trolley capable of providing lifting power, a running track of the coal conveying belt, a coal conveying belt guide chute and a synchronous lifting device of the coal conveying belt guide chute, wherein the coal conveying belt guide chute comprises a fixed part and a part capable of lifting along with a belt, the fixed part and the liftable part are connected through hinges, the liftable part completes a synchronous lifting function through a bolt traction device arranged on the inner side of the running track of the coal unloading trolley, the bolt traction device comprises a rod with a hook and a bolt chute, the bolt chute is welded on the inner side of the running track of the coal unloading trolley, a blocking piece used for pushing the rod with the hook is welded on a trolley body of the coal unloading trolley, and the rod with the hook is inserted into the bolt chute in a first state of the advancing process of the trolley; in a second state of the advancing process of the trolley, the rod with the hook and the coal unloading trolley travel together and are separated from the bolt groove; the tail part of the rod with the hook is connected with one end of a traction steel wire rope, and the traction steel wire rope pulls the liftable part of the material guide chute to synchronously lift through the pulley block along with the advance of the coal unloading trolley.

2. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the material guide chute as claimed in claim 1, wherein a top pulley matching the number of bottom pulleys in the pulley block is further arranged above the material guide chute, the top pulley is fixed on the support, and the bottom pulley and the top pulley are wound and connected through the steel wire rope.

3. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the material guide chute as claimed in claim 1, wherein a plurality of curtain blocking mechanisms for blocking coal dust rushing out of the material guide chute are arranged inside the material guide chute, the curtain blocking mechanisms are fixed at the top of the material guide chute through clamping plates and bolts, and each curtain blocking mechanism comprises a plurality of columnar rubber strips.

4. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the material guide chute as claimed in claim 1, wherein a safety device is arranged above the material guide chute, and the safety device connects the lifting part of the material guide chute with the bracket above the material guide chute by using a steel wire rope.

5. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the guide chute as claimed in any one of claims 1 to 4, wherein sealing mechanisms are arranged on two sides of the guide chute, specifically, guide chute sealing skirts which are fixed on two sides of the guide chute through buckles and fixing plates.

6. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the material guide chute as claimed in any one of claims 1 to 4, wherein a dry-fog dust removing nozzle and a two-fluid fan-shaped nozzle are arranged inside the material guide chute.

7. The mechanical-principle-based synchronous lifting device for the coal conveying belt and the material guide chute as claimed in any one of claims 1 to 4, wherein the fixed part and the lifting part of the material guide chute are connected and sealed through fireproof and dustproof cloth.

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