Air pre-heater air leakage recycling control device

Abstract

The utility model discloses an air pre-heater air leakage recycling control device, and relates to the technical field of air pre-heaters. Comprising an air pre-heater, a cover plate is detachably arranged at the top end of the air pre-heater, a protective cover is arranged on the surface, making contact with the air pre-heater, of the cover plate, four sets of piston pipes are arranged on the inner ring face of the protective cover, piston rods are elastically connected to one sides of inner cavities of the piston pipes, and bent pipes are fixedly installed on the sides, close to the surface of the protective cover, of the piston pipes; a rotating wheel is rotationally connected to the center of the top end of the cover plate, and two protruding blocks are symmetrically arranged on the surface of the rotating wheel. Through the protrusions arranged on the surface of the rotating wheel, the piston rod can conduct extrusion and reset sliding in the piston pipe, and when the piston rod conducts reset sliding in the piston pipe, gas in the protective cover is sucked into the piston pipe; when the piston rod extrudes and slides in the piston pipe, gas is discharged into the air pre-heater through the bent pipe, and the leaked gas is reused.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to an air leakage recycling control device for air preheaters. Background Art

[0002] The air preheater is a heating surface where the flue gas in the tail flue of the boiler preheats the air before entering the boiler to a certain temperature through the internal heat sink. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. As the use time increases, the sealing effect of the air preheater will decrease, causing air leakage in the air preheater, which will affect the safe and economical operation of the boiler unit. In view of the above problems, an air preheater leakage reuse control device is proposed to solve the above problems. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide an air preheater leakage reuse control device.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an air preheater air leakage recycling control device, comprising an air preheater, a cover plate is detachably provided on the top of the air preheater, a protective cover is provided on the surface of the cover plate in contact with the air preheater, four groups of piston tubes are provided on the inner ring surface of the protective cover, a piston rod is elastically connected to one side of the inner cavity of the piston tube, and a bent pipe is fixedly installed on the side of the piston tube close to the surface of the protective cover;

[0005] A rotating wheel is rotatably connected at the center position of the top end of the cover plate, and two protrusions are symmetrically arranged on the surface of the rotating wheel.

[0006] Preferably, one-way valves are provided on one side of the piston tube close to the protective cover and inside the bent tube.

[0007] Preferably, a leak-proof pad is provided at the intersection of the air preheater at the bottom end of the protective cover.

[0008] Preferably, the distance between the two piston tubes is the same, and one side of the piston tube extends to the inside of the protective cover.

[0009] Preferably, one side of the bent pipe extends to the interior of the piston tube, and the other side of the bent pipe penetrates the cover plate and extends to the interior of the air preheater.

[0010] Preferably, the diameter of the bent tube is smaller than the diameter of the piston tube.

[0011] Preferably, a connecting shaft is provided at the center position of the bottom end of the impeller, and the connecting shaft penetrates the cover plate and extends to the interior of the air preheater.

[0012] Preferably, the protective cover, piston tube and bent tube are all made of high temperature resistant silicon nitride material.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By means of the protrusions arranged on the surface of the runner, the piston rod can be squeezed and reset and slide inside the piston tube. When the piston rod resets and slides inside the piston tube, the gas in the protective cover is sucked into the piston tube. When the piston rod squeezes and slides inside the piston tube, the gas is discharged into the air preheater through the bent pipe, and the leaked gas is reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the protective cover of the utility model;

[0018] Figure 3 This is the flow diagram of the piston tube and elbow in the utility model.

[0019] In the figure: 1. air preheater; 2. protective cover; 3. piston tube; 4. piston rod; 5. elbow; 6. impeller; 7. bump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: Figure 1-Figure 3 As shown, the utility model provides an air preheater air leakage recycling control device, comprising an air preheater 1, a cover plate is detachably provided at the top of the air preheater 1, the cover plate when detachable is convenient for daily maintenance of the components inside the air preheater 1, a protective cover 2 is provided on the surface of the cover plate contacting the air preheater 1, a gap exists between the contact part of the cover plate and the air preheater 1, the gas inside the air preheater 1 leaks out through the gap, and the leaked gas flows into the inside of the protective cover 2, the inner annular surface of the protective cover 2 is provided with four groups of piston tubes 3, and the distance between two piston tubes 3 is the same;

[0022] One side of the piston tube 3 extends to the inside of the protective cover 2, one side of the inner cavity of the piston tube 3 is elastically connected with a piston rod 4, a side of the piston tube 3 close to the surface of the protective cover 2 is fixedly installed with a bent pipe 5, one side of the bent pipe 5 extends to the inside of the piston tube 3, and the other side of the bent pipe 5 penetrates the cover plate and extends to the inside of the air preheater 1, the diameter of the bent pipe 5 is smaller than the diameter of the piston tube 3, a runner 6 is rotatably connected at the center position of the top of the cover plate, a connecting shaft is provided at the center position of the bottom end of the runner 6, and the connecting shaft at the bottom end of the runner 6 extends to the inside of the air preheater 1 and is connected to the rotating shaft;

[0023] When the air preheater 1 is running, the rotating shaft rotates the runner 6 through the connecting shaft, and the protrusions 7 on the surface of the runner 6 squeeze two groups of piston rods 4, so that the gas inside the piston tube 3 enters the interior of the air preheater 1 through the curved pipe 5. When the protrusions 7 gradually leave the two squeezed piston rods 4, the piston rod 4 quickly returns to slide under the action of elasticity, thereby sucking the gas leaked from the inside of the protective cover 2 into the interior of the piston tube 3. The connecting shaft passes through the cover plate and extends to the interior of the air preheater 1. Two protrusions 7 are symmetrically provided on the surface of the runner 6.

[0024] One-way valves are provided on one side of the piston tube 3 close to the protective cover 2 and inside the curved pipe 5, and a leak-proof pad is provided at the intersection of the bottom end of the protective cover 2 and the air preheater 1.

[0025] The one-way valve is set so that the piston tube 3 can only inhale air and the bent pipe 5 can only discharge air. The leak-proof pad is set on one side of the bottom end of the protective cover 2 to prevent the leaked gas from leaking out through the gap between the protective cover 2 and the surface of the air preheater 1.

[0026] The protective cover 2, the piston tube 3 and the bent tube 5 are all made of high temperature resistant silicon nitride material.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An air preheater leakage air recycling control device, comprising an air preheater (1), characterized in that: The top of the air preheater (1) is detachably provided with a cover plate, the surface of the cover plate in contact with the air preheater (1) is provided with a protective cover (2), the inner ring surface of the protective cover (2) is provided with four groups of piston tubes (3), one side of the inner cavity of the piston tube (3) is elastically connected to a piston rod (4), and a bent pipe (5) is fixedly installed on the side of the piston tube (3) close to the surface of the protective cover (2); A rotating wheel (6) is rotatably connected at the center position of the top end of the cover plate, and two protrusions (7) are symmetrically arranged on the surface of the rotating wheel (6).

2. The air preheater leakage air reuse control device according to claim 1, characterized in that: One-way valves are provided on the side of the piston tube (3) close to the protective cover (2) and inside the bent tube (5).

3. The air preheater leakage air reuse control device according to claim 2, characterized in that: A leak-proof pad is provided at the intersection of the bottom end of the protective cover (2) and the air preheater (1).

4. The air preheater leakage air reuse control device according to claim 2, characterized in that: The distance between the two piston tubes (3) is the same, and one side of the piston tube (3) extends to the inside of the protective cover (2).

5. The air preheater leakage air reuse control device according to claim 4, characterized in that: One side of the curved pipe (5) extends to the interior of the piston tube (3), and the other side of the curved pipe (5) penetrates the cover plate and extends to the interior of the air preheater (1).

6. The air preheater leakage air reuse control device according to claim 5, characterized in that: The diameter of the curved tube (5) is smaller than the diameter of the piston tube (3).

7. The air preheater leakage air reuse control device according to claim 1, characterized in that: A connecting shaft is provided at the center position of the bottom end of the wheel (6), and the connecting shaft penetrates the cover plate and extends to the interior of the air preheater (1).

8. The air preheater leakage air reuse control device according to claim 1, characterized in that: The protective cover (2), the piston tube (3) and the bent tube (5) are all made of high-temperature resistant silicon nitride material.

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