Smoke barrier plate at lower part of heating surface of waste heat boiler

Abstract

The utility model relates to a smoke baffle on the lower portion of a waste heat boiler heating surface, and belongs to the technical field of boiler equipment. The upper blocking plate is fixed on the lower portion of the heating surface, the lower blocking plate is fixed on a bottom protective plate, the lower plate face of the upper blocking plate and the upper plate face of the lower blocking plate are in lap joint below a heating surface connecting pipe, and the upper blocking plate is provided with a through hole for the heating surface connecting pipe to penetrate through. According to the utility model, the heating surface connecting pipe penetrates through the upper barrier plate, and when the upper barrier plate and the heating surface connecting pipe move up and down along with thermal expansion and cold contraction of the heating surface, the upper barrier plate and the heating surface connecting pipe can move up and down synchronously, so that the occurrence of deformation and damage of the smoke barrier plate caused by the action of the heating surface connecting pipe in the prior art is avoided; therefore, the novel smoke-proof window has a longer service life and a more stable smoke-proof effect.

Description

Technical Field

[0001] The utility model relates to a smoke barrier plate at the lower part of a heating surface of a waste heat boiler, belonging to the technical field of boiler equipment. Background Art

[0002] In order to prevent the smoke from forming a "smoke corridor" in the gap between the heating surface and the guard plate, smoke baffles are installed on the upper and lower parts of the heating surface of the waste heat boiler. The smoke baffle at the lower part of the heating surface of the waste heat boiler consists of two parts connected in an overlapping manner (such as the attached Figure 1 As shown), the upper baffle plate 1 is fixed to the lower part of the heated surface, the lower baffle plate 2 is fixed to the bottom guard plate 5, the upper baffle plate 1 and the lower baffle plate 2 are overlapped at the position above the heated surface communication pipe 8, and the lower baffle plate 2 is provided with a through hole for the heated surface communication pipe 8 to pass through. In the above scheme, the upper baffle plate 1 can move up and down along the surface of the lower baffle plate 2 to meet the requirement of its up and down displacement with the heated surface due to thermal expansion and contraction of the heated surface. The above scheme also has the following defects during actual use: since the heated surface communication pipe 8 passes through the lower baffle plate 2, and the lower baffle plate 2 is fixed on the bottom guard plate 5, the heated surface communication pipe 8 will generate a great force on the lower baffle plate 2 when it is displaced due to thermal expansion and contraction of the heated surface, causing deformation and damage to the lower baffle plate 2, thereby affecting the smoke isolation effect of the smoke baffle. Summary of the invention

[0003] The utility model mainly solves the technical problem in the prior art that the smoke barrier plate is prone to deformation and damage, which affects the smoke isolation effect, and provides a smoke barrier plate under the heating surface of a waste heat boiler which is not prone to deformation and damage.

[0004] The utility model solves the above-mentioned technical problems mainly through the following technical solutions: the utility model includes an upper baffle plate fixed to the heating surface, and a lower baffle plate fixed to the bottom guard plate, and the lower plate surface of the upper baffle plate overlaps the upper plate surface of the lower baffle plate, and is characterized in that the overlapping part of the upper baffle plate and the lower baffle plate is located below the heating surface connecting pipe, and the upper baffle plate is provided with a through hole for the heating surface connecting pipe to pass through.

[0005] Preferably, reinforcing ribs are distributed on the surface of the upper baffle plate.

[0006] Preferably, the lower baffle plate comprises two L-shaped plates arranged back to back, and a slot into which the lower plate surface of the upper baffle plate can be inserted is formed between the two L-shaped plates.

[0007] The utility model has a simple structure and has the following advantages:

[0008] On the basis of the prior art, the utility model extends the lower plate surface of the upper baffle plate downward to a position below the horizontal height of the heating surface communication pipe and overlaps with the lower baffle plate, and the upper baffle plate is provided with a through hole for the heating surface communication pipe to pass through. During the use of the utility model, when the heating surface communication pipe moves up and down with the thermal expansion and contraction of the heating surface, the upper baffle plate moves up and down in the same manner with the thermal expansion and contraction of the heating surface, that is, the upper baffle plate moves up and down synchronously with the heating surface communication pipe, therefore, the utility model avoids the occurrence of deformation and damage of the smoke baffle plate due to the force of the heating surface communication pipe.

[0009] Furthermore, a reinforcing rib plate is provided on the upper baffle plate, which can effectively improve the overall rigidity of the upper baffle plate and prevent the upper baffle plate from being deformed under the action of smoke pressure.

[0010] Furthermore, the lower baffle plate is composed of two L-shaped plates arranged back to back, and the lower plate surface of the upper baffle plate is inserted into the slot between the two L-shaped plates, so that the overall structure of the smoke baffle plate can have good strength, rigidity and sealing.

[0011] Therefore, the utility model has a simple structure and is easy to manufacture. Compared with the prior art, the utility model has a longer service life and a more stable smoke isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the prior art;

[0013] Attached Figure 2 It is a schematic diagram of a preferred embodiment of the utility model.

[0014] Explanation of the reference numerals: 1. Upper baffle plate; 2. Lower baffle plate; 3. Reinforcing rib plate; 4. Slot; 5. Bottom guard plate; 6. Lower bolt; 7. Heating surface heat exchange tube; 8. Heating surface connecting tube; 9. Lower header; 10. Upper bolt; 11. Hook bolt; 12. Through hole. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0016] Embodiment 1: As attached Figure 2 As shown, the utility model comprises an upper baffle plate 1 fixed to the lower part of the heating surface, and a lower baffle plate 2 fixed to the bottom guard plate 5;

[0017] The upper baffle plate 1 is a folding plate, the upper part of which is fixedly connected to the heating surface tube 7 by a hook-shaped bolt 11 and is fixedly connected to the lower header 9 by an upper bolt 10. A through hole 12 is provided in the middle of the folding plate and a reinforcing rib plate 3 is distributed thereon. The lower part of the folding plate is inserted into a slot 4 formed in the lower baffle plate 2.

[0018] The lower baffle plate 2 comprises two L-shaped plates arranged back to back, the gap between the vertical surfaces of the two L-shaped plates forms a slot 4, and the L-shaped plate is fixed to the bottom guard plate 5 by lower bolts 6;

[0019] The slot width of the slot 4 is equivalent to the thickness of the upper blocking plate 1;

[0020] The heating surface communication pipe 8 passes through the through hole 12 , and the aperture of the through hole 12 is equivalent to the outer diameter of the heating surface communication pipe 8 .

[0021] When the utility model is in use, the upper baffle plate 1 and the lower baffle plate 2 together form a baffle for blocking smoke; when the heated surface communication pipe 8 moves up and down with the thermal expansion and contraction of the heated surface, the upper baffle plate 1 and the heated surface communication pipe 8 move up and down synchronously, so that the smoke baffle plate will not be deformed or damaged due to the up and down movement of the heated surface communication pipe 8, and the service life of the smoke baffle plate is long.

[0022] Of course, the above drawings and embodiments are only used to explain and illustrate the utility model, and cannot be used as an improper limitation of the utility model. Any technical solutions obtained by those skilled in the art making equivalent adjustments and changes based on the utility model fall within the protection scope of the utility model.

Claims

1. A flue gas baffle plate under the heating surface of a waste heat boiler, comprising an upper baffle plate (1) fixed to the lower portion of the heating surface, and a lower baffle plate (2) fixed to a bottom guard plate (5), wherein the lower plate surface of the upper baffle plate (1) overlaps the upper plate surface of the lower baffle plate (2), It is characterized in that The overlapped portion of the upper baffle plate (1) and the lower baffle plate (2) is located below the heating surface communication pipe (8), and the upper baffle plate (1) is provided with a through hole (12) for the heating surface communication pipe (8) to pass through.

2. A flue gas baffle plate under the heating surface of a waste heat boiler according to claim 1, It is characterized in that The upper baffle plate (1) is provided with reinforcing rib plates (3) distributed on its surface.

3. A flue gas baffle plate under the heating surface of a waste heat boiler according to claim 1 or 2, It is characterized in that The lower baffle plate (2) is composed of two L-shaped plates arranged back to back, and a slot (4) is formed between the two L-shaped plates into which the lower plate surface of the upper baffle plate (1) can be inserted.

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