CN216923612U

CN216923612U - Wear-resistant elbow of powder feeding pipeline

Info

Publication number: CN216923612U
Application number: CN202220200882.6U
Authority: CN
Inventors: 王德文; 杨震; 罗军; 王勇; 安峰
Original assignee: Dalian Power Generation Co ltd
Current assignee: Dalian Power Generation Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-08
Anticipated expiration: 2032-01-25

Abstract

The utility model provides a wear-resistant elbow of a powder feeding pipeline, which relates to the technical field of boiler powder making and comprises a wear-resistant elbow, wherein a protection ring is arranged inside the wear-resistant elbow, a buffer cavity is formed between the protection ring and the inner wall of the wear-resistant elbow, a buffer spring is arranged inside the buffer cavity, two ends of the buffer spring are respectively connected with the outer surface of the protection ring and the inner wall of the wear-resistant elbow, a buffer channel is formed inside the protection ring, and the radian of the buffer channel is equal to that of the wear-resistant elbow. Adopt buffering passageway, and form the cushion chamber between the inner wall of wear-resisting return bend and the guard circle inner wall, can make the guard circle play the cushioning effect, reduce the impact force of fifty percent discount locating when sending the powder in-process through wear-resisting return bend to prolong its life-span, and do not need frequent maintenance or change, cooperate the rubber pad of connecting pipe department simultaneously, make the guard circle can have the activity interval in certain extent, guarantee that the handing-over department of connecting pipe and wear-resisting return bend can not receive great impact force.

Description

Wear-resistant elbow of powder feeding pipeline

Technical Field

The utility model relates to the technical field of boiler powder making, in particular to a wear-resistant elbow of a powder feeding pipeline.

Background

The boiler pulverizing system is in positive pressure type, each boiler pulverizing system is provided with five coal mills and powder feeding pipelines, the outlet of each coal mill is provided with twenty powder feeding pipelines, and the nominal diameter Dn600 of each powder feeding pipeline is provided. The powder feeding pipeline is used for conveying qualified pulverized coal ground by the coal grinding machine to the same layer of burners at four corners of the hearth for burning. The powder feeding pipeline system mainly comprises a silicon carbide wear-resistant elbow, a spherical three-dimensional compensator, a maintenance type pipe connector, an adjustable shrinkage cavity, a pneumatic inserting plate door, a pipeline, a supporting hanger and the like.

Major problems in operation: the unit runs for a long time, the abrasion-resistant bent pipe of the powder feeding pipeline system leaks powder seriously, the long-term stable and reliable running of the powder feeding pipeline system cannot be ensured, the cracking of the abrasion-resistant bent pipe shell is found through inspection to be the main reason for the powder leakage of the bent pipe, and the long-term reliable and stable running of the powder preparation system is seriously influenced by the leakage of coal powder.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a wear-resistant bent pipe of a powder feeding pipeline.

In order to achieve the purpose, the utility model adopts the following technical scheme: send wear-resisting return bend of powder pipeline, including wear-resisting return bend, the inside of wear-resisting return bend is equipped with the guard circle, form the cushion chamber between the inner wall of guard circle and wear-resisting return bend, the inside of cushion chamber is equipped with buffer spring, and buffer spring's both ends respectively with guard circle surface, wear-resisting return bend inner wall connection, the inside of guard circle forms the buffering passageway, and the radian of buffering passageway and the radian of wear-resisting return bend equal.

Preferably, the two ends of the wear-resistant elbow pipe are provided with connecting pipes, and the connecting pipes and the wear-resistant elbow pipe are integrally formed.

Preferably, a rubber pad is arranged between the end part of the protection ring and the connecting pipe, the rubber pad is bonded on the inner wall of the connecting pipe, and the rubber pad is bonded on the outer surface of the protection ring.

Preferably, the end of the rubber pad is abutted against the end of the protection ring, and the end of the protection ring is connected with the inner wall of the connecting pipe.

Preferably, the inner walls of the wear-resistant elbow and the protective ring are polished, and the hinged part of the protective ring and the connecting pipe is sealed.

Advantageous effects

According to the utility model, the buffer channel is adopted and is positioned in the wear-resistant elbow, the protection ring is arranged in the wear-resistant elbow, the buffer cavity is formed between the inner wall of the wear-resistant elbow and the protection ring, the buffer spring is arranged between the protection ring and the inner wall of the wear-resistant elbow, the protection ring can play a buffer role through the connection of the buffer spring, the impact force on the bent part when the powder passes through the wear-resistant elbow in the powder feeding process is reduced, the service life of the powder feeding device is prolonged, the powder feeding device does not need to be maintained or replaced frequently, meanwhile, the protection ring can have a movable area in a certain range by matching with the rubber pad at the connecting pipe, and the joint of the connecting pipe and the wear-resistant elbow is ensured not to be subjected to larger impact force.

In the utility model, when powder leakage occurs in the wear-resistant elbow, leakage points of the powder feeding pipeline need to be eliminated, the weld opening of the wear-resistant elbow shell of the powder feeding pipeline is checked, the cracked weld opening is welded by 507 welding rods, the leakage points of the powder feeding pipeline are eliminated, the strength of the weld opening is improved, the service life of the wear-resistant elbow shell of the powder feeding pipeline is prolonged, the opportunity of level maintenance is utilized, the weld opening of the wear-resistant elbow shell of the powder feeding pipeline is reinforced by flat steel, and the tensile strength of the weld opening is improved to prevent the weld opening from cracking.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is a top view of the present invention.

Illustration of the drawings:

1. a wear-resistant bent pipe; 2. a connecting pipe; 3. a rubber pad; 4. a buffer chamber; 5. a buffer spring; 6. a guard ring; 7. a buffer channel.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the utility model easily understood, the utility model is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the utility model, and not all embodiments. Other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the implementation belong to the protection scope of the utility model.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

The specific embodiment is as follows:

referring to fig. 1-3, the wear-resistant elbow for the powder feeding pipeline comprises a wear-resistant elbow 1, a protection ring 6 is arranged inside the wear-resistant elbow 1, a buffer cavity 4 is formed between the protection ring 6 and the inner wall of the wear-resistant elbow 1, a buffer spring 5 is arranged inside the buffer cavity 4, two ends of the buffer spring 5 are respectively connected with the outer surface of the protection ring 6 and the inner wall of the wear-resistant elbow 1, a buffer channel 7 is formed inside the protection ring 6, and the radian of the buffer channel 7 is equal to that of the wear-resistant elbow 1.

Both ends of wear-resisting return bend 1 all are equipped with connecting pipe 2, and connecting pipe 2 and wear-resisting return bend 1 integrated into one piece, be equipped with rubber pad 3 between tip and the connecting pipe 2 of guard ring 6, and rubber pad 3 bonds at the inner wall of connecting pipe 2, and the surface bonding of rubber pad 3 and guard ring 6, the tip of rubber pad 3 offsets with the tip of guard ring 6, and the tip and the 2 interior wall connections of connecting pipe of guard ring 6, the polishing is polished and is handled to the inner wall of wear-resisting return bend 1 and guard ring 6, and the articulated department of guard ring 6 and connecting pipe 2 carries out sealing process.

Adopt buffering passageway 7, buffering passageway 7 is located wear-resisting return bend 1's inside, install guard circle 6 in wear-resisting return bend 1's inside, and form cushion chamber 4 between wear-resisting return bend 1's the inner wall and the inner wall of guard circle 6, install buffer spring 5 between guard circle 6 and the wear-resisting return bend 1's the inner wall, through buffer spring 5's connection, can make guard circle 6 play the cushioning effect, reduce the impact force of fifty percent discount crotch when sending powder in-process through wear-resisting return bend 1, thereby prolong its life-span, and do not need frequent maintenance or change, cooperate rubber pad 3 of connecting pipe 2 department simultaneously, make guard circle 6 can have the activity interval in certain extent, guarantee that the handing-over department of connecting pipe 2 and wear-resisting return bend 1 can not receive great impact force.

The second embodiment is as follows:

the shell of the wear-resistant elbow 1 of the powder feeding pipeline is cracked, and the cost for replacing the new wear-resistant elbow 1 is high and the construction period is long. The improved wear-resistant elbow 1 for the powder feeding pipeline is simple, reliable, low in cost, guaranteed in construction period and capable of guaranteeing long-term use. After the wear-resistant elbow 1 of the powder feeding pipeline system is innovatively transformed, the wear-resistant elbow 1 of the powder feeding pipeline system can be guaranteed not to crack in a major repair period, the safe and economic operation of a slag-water system is guaranteed, and a large amount of manpower and material resources are saved.

When powder leakage appears in wear-resisting return bend 1, need eliminate and send powder pipeline leakage point, the inspection is sent 1 casing weld bead of wear-resisting return bend of powder pipeline, weld bead with the 507 welding rod of fracture and is welded, eliminate and send powder pipeline leakage point and improve weld bead intensity, improve again and send 1 life cycle of wear-resisting return bend of powder pipeline, utilize the grade to overhaul the chance, consolidate sending 1 casing weld bead of wear-resisting return bend of powder pipeline with the band steel, the tensile strength who improves the weld bead prevents the weld bead fracture, the concrete scheme is: the strength of the welded junction is enhanced by welding flat steel bars with the specification of 60 x 6 and the length of 100mm every 200mm along the welded junction, so that the welded junction is prevented from cracking, the problem of powder leakage caused by cracking of the welded junction at the shrimp waist position of the elbow of the powder feeding pipeline is effectively solved, the service life of the silicon carbide elbow is greatly prolonged, the construction process is relatively simple, and the improvement effect is obvious.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Send wear-resisting elbow of powder pipeline, including wear-resisting return bend (1), its characterized in that: the inside of wear-resisting return bend (1) is equipped with guard circle (6), form cushion chamber (4) between the inner wall of guard circle (6) and wear-resisting return bend (1), the inside of cushion chamber (4) is equipped with buffer spring (5), and buffer spring's (5) both ends respectively with guard circle (6) surface, wear-resisting return bend (1) inner wall connection, the inside of guard circle (6) forms buffering passageway (7), and the radian of buffering passageway (7) and the radian of wear-resisting return bend (1) equal.

2. The wear-resistant elbow of the powder feeding pipeline as claimed in claim 1, wherein: both ends of wear-resisting return bend (1) all are equipped with connecting pipe (2), and connecting pipe (2) and wear-resisting return bend (1) integrated into one piece.

3. The wear-resistant elbow of the powder feeding pipeline as claimed in claim 2, wherein: a rubber pad (3) is arranged between the end of the protection ring (6) and the connecting pipe (2), the rubber pad (3) is bonded on the inner wall of the connecting pipe (2), and the rubber pad (3) is bonded on the outer surface of the protection ring (6).

4. The wear-resistant elbow of the powder feeding pipeline as claimed in claim 3, wherein: the end part of the rubber pad (3) is propped against the end part of the protective ring (6), and the end part of the protective ring (6) is connected with the inner wall of the connecting pipe (2).

5. The wear-resistant elbow of the powder feeding pipeline as claimed in claim 1, wherein: the inner walls of the wear-resistant elbow pipe (1) and the protective ring (6) are polished, and the hinged part of the protective ring (6) and the connecting pipe (2) is sealed.