High-temperature reheater anti-friction device

Abstract

The present invention relates to a high-temperature reheater anti-friction device for anti-friction of metal tubes on a heated surface of a high-temperature reheater adjacent to a soot blower, has a hole-type tube clamp arranged on a metal tube of a heated surface of a high-temperature reheater, an anti-friction box and an anti-friction cover. Compared with the prior art, the present invention has the advantages of reduced maintenance workload of the unit and prolonged service life of the metal tube.

Claims

1. A high-temperature reheater anti-friction device for anti-friction of metal tubes (6) on a heated surface of a high-temperature reheater adjacent to a soot blower (5); wherein the high-temperature reheater anti-friction device comprises a hole-type tube clamp (1), an anti-friction box (2) and an anti-friction cover (3) arranged on the metal tubes (6) on the heated surface of the high-temperature reheater, the metal tube (6) comprises a plurality of furnace tubes arranged in parallel at equal intervals, each furnace tube comprises a U-shaped bent tube section (62) and a vertical tube section (61) arranged above the U-shaped bent tube section, the hole-type tube clamp (1) is sleeved and clamped on the vertical tube section (61) of the metal tube (6), the anti-friction box (2) is covered on the vertical tube section (61) adjacent to the side of the soot blower (5), the anti-friction cover (3) comprises a 90° anti-friction cover (32) covering the outermost furnace tube on the side, adjacent to the soot blower (5), of the U-shaped bent tube section (62), and a straight anti-friction cover (31) covering the innermost furnace tube on the side, adjacent to the soot blower (5), of the vertical tube section (61), the top of the 90° anti-friction cover (32) is welded to the bottom of the anti-friction box (2), and the top of the straight anti-friction cover (31) is welded to the bottom of the hole-type tube clamp (1).

2. The high-temperature reheater anti-friction device of claim 1, further comprising a comb plate (4), wherein the comb plate (4) is mounted in the central position of the U-shaped bent tube section (62).

3. The high-temperature reheater anti-friction device of claim 2, wherein the top of the anti-friction box (2) is welded to the hole-type tube clamp (1).

4. The high-temperature reheater anti-friction device of claim 2, wherein the 90° anti-friction cover (32) and the straight anti-friction cover (31) are respectively fixed to the corresponding furnace tube by means of an anti-friction cover access board (33).

5. The high-temperature reheater anti-friction device of claim 2, wherein the comb plate (4) comprises a plate body (41) and a number of strip-shaped holes (42) arranged in parallel at equal intervals at one end of the plate body (41), the number of the strip-shaped holes (42) is the same as the number of furnace tubes of the metal tube (6), the interval of each strip-shaped hole (42) is the same as the interval of each furnace tube of the metal tube (6), and the width of each strip-shaped hole (42) matches the outer diameter dimension of each furnace tube of the metal tube (6).

6. The high-temperature reheater anti-friction device of claim 1, wherein the hole-type tube clamp (1) comprises two clamping parts arranged symmetrically, the two clamping parts are respectively provided with a central connecting plate and a plurality of parallel semi-circular docking units (11) which are arranged symmetrically on both sides of the central connecting plate, and the central position of each semi-circular docking unit (11) is provided with a semi-circular hole for inserting each single furnace tube of the vertical tube section (61), and the two clamping parts are provided with fitting pieces to form a tube clamp with a plurality of circular mounting holes (12) after fitting.

7. The high-temperature reheater anti-friction device of claim 6, wherein the number of the semi-circular docking units (11) in each clamping part is the same as the number of furnace tube bodies of the metal tube (6), and the dimension and shape of each semi-circular hole are the same as the outer diameter dimension and cross-sectional shape of the furnace tube body of the metal tube (6).

8. The high-temperature reheater anti-friction device of claim 6, wherein the fitting piece comprises a mounting bolt (13) arranged between each semi-circular docking unit (11) of one clamping part and a mounting hole arranged on the other clamping part for fitting with the mounting bolt (13).

9. The high-temperature reheater anti-friction device of claim 6, wherein the inner diameter dimension of the semi-circular docking unit (11) is the same as the outer diameter dimension of each single furnace tube of the vertical tube section (61) to be clamped.

10. The high-temperature reheater anti-friction device of claim 4, wherein the anti-friction cover access board (33) is an arc-shaped plate structure, and the inner diameter corresponding to the radian of the anti-friction cover access board (33) is the same as the outer diameter of the furnace tube.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic diagram of a main view of a high-temperature reheater anti-friction device in the present embodiment;

(2) FIG. 2 is a structural schematic diagram of a side view of a high-temperature reheater anti-friction device in the present embodiment;

(3) FIG. 3 is a structural schematic diagram of a comb plate of a high-temperature reheater anti-friction device in the present embodiment;

(4) FIG. 4 is a structural schematic diagram of a main view of a hole-type tube clamp of a high-temperature reheater anti-friction device in the present embodiment;

(5) FIG. 5 is a structural schematic diagram of a side view of a hole-type tube clamp of a high-temperature reheater anti-friction device in the present embodiment;

(6) FIG. 6 is a structural schematic diagram of a straight anti-friction cover of a high-temperature reheater anti-friction device in the present embodiment;

(7) FIG. 7 is a structural schematic diagram of a 90° anti-friction cover of a high-temperature reheater anti-friction device in the present embodiment;

(8) FIG. 8 is a structural schematic diagram of an anti-friction cover access board of a high-temperature reheater anti-friction device in the present embodiment;

(9) FIG. 9 is a structural schematic diagram of an anti-friction box of a high-temperature reheater anti-friction device in the present embodiment.

REFERENCE NUMERALS IN THE FIGURES

(10) 1, hole-type tube clamp, 11, semi-circular docking unit, 12, circular mounting hole, 13, mounting bolt, 2, anti-friction box, 31, straight anti-friction cove, 32, 90° anti-friction cover, 33, anti-friction cover access board, 4, comb plate, 41, plate body, 42, strip-shaped hole, 5, soot blower, 6, metal tube, 61, vertical tube section, 62, U-shaped bent tube section, 7, horizontal flue.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(11) The present invention is described in detail below in combination with the accompanying drawings and a specific embodiment. Obviously, the described embodiment is a part but not all of the embodiments of the present invention. Based on the embodiment in the present invention, all the other embodiments obtained by those skilled in the art without any creative effort shall all fall within the protection scope of the present invention.

Embodiment

(12) The present invention relates to a high-temperature reheater anti-friction device mounted on a metal tube 6 of a heated surface of a high-temperature reheater, and a soot blower 5 is arranged adjacent to the high-temperature reheater. The metal tube 6 includes a plurality of furnace tubes arranged in parallel at equal intervals. The metal tube 6 is arranged above the horizontal flue 7. As shown in FIG. 1 to FIG. 2, the device includes a hole-type tube clamp 1, an anti-friction box 2, an anti-friction cover 3 and a comb plate 4. Each single furnace tube of the metal tube 6 of the heated surface of the high-temperature reheater respectively includes a U-shaped bent tube section 62 and a vertical tube section 61 above the U-shaped bent tube section 62. A soot blower 5 is arranged adjacent to the vertical tube section 61 at a side above the U-shaped bent tube section 62. The hole-type tube clamp 1 is sleeved and clamped on the vertical tube section 61 of the metal tube 6.

(13) The anti-friction box 2 is a rectangular box with a hollow structure, as shown in FIG. 9. The anti-friction box 2 is covered on the vertical tube section 61 adjacent to the side of the soot blower 5, and the top of the anti-friction box 2 is welded to the bottom of the hole-type tube clamp 1. Further, the height of the anti-friction box 2: the upper part of the anti-friction box 2 starts from the hole-type tube clamp 1, and the lower part reaches the bending point of the furnace tube on the inner side of the U-shaped bent tube section 62; and the width of the anti-friction box 2: the anti-friction box 2 wraps all the vertical tube section 61 adjacent to the side of the soot blower 5.

(14) The anti-friction cover 3 includes a straight anti-friction cover 31, a 90° anti-friction cover 32 and an anti-friction cover access board 33. The straight anti-friction cover 31 is a semi-circular vertical tubular structure with an open mouth, and is covered on the innermost furnace tube on the side, adjacent to the soot blower 5, of the vertical tube section 61, and after the straight anti-friction cover 31 is covered on the furnace tube, the inner side of the open end is welded to the two ends of the anti-friction cover access board 33, such that the straight anti-friction cover 31 clings to the furnace tube. The top of the straight anti-friction cover 31 is welded to the bottom of the hole-type tube clamp 1 to prevent from falling off.

(15) The 90° anti-friction cover 32 is a semi-closed tubular structure with bent corners, as shown in FIG. 7, and includes a straight section and a bent section, and the radian of the bent section is 90 degrees. The 90° anti-friction cover 32 is covered on the outermost furnace tube on the side, adjacent to the soot blower 5, of the U-shaped bent tube section 62 side through an open end, and after the 90° anti-friction cover is covered on the furnace tube, the inner side of the open end is welded with the two ends of the anti-friction cover access board 33, which in turn makes it fit tightly with the furnace tube. The top of the 90° anti-friction cover 32 is welded to the bottom of the anti-friction box 2, to prevent from falling off.

(16) As shown in FIG. 8, the anti-friction cover access board 33 is an arc-shaped plate structure, and the inner diameter corresponding to the radian of the anti-friction cover access board is the same as the outer diameter of the furnace tube, such that the straight anti-friction cover 31, the inner side of the open end of the 90° anti-friction cover 32 and the anti-friction cover access board 33 are stably welded, to completely cling to the furnace tube. Further, the height of the straight anti-friction cover 31: the upper part of the straight anti-friction cover 31 starts from the hole-type tube clamp 1, and the lower part reaches the bending point of the furnace tube on the inner side of the U-shaped bent tube section 62; and the height of the 90° anti-friction cover 32: the upper part of the 90° anti-friction cover 32 starts from the anti-friction box 2, and the lower part reaches the horizontal section of the furnace tube at the outer side of the U-shaped bent tube section 62, exceeding the bending point by 200 mm.

(17) The central position of the U-shaped bent tube section 62 is mounted with a comb plate 4. As shown in FIG. 3, the comb plate 4 includes a plate body 41 and strip-shaped holes 42 arranged in parallel at equal intervals, and each strip-shaped hole 42 is arranged at one end of the plate body 41. The number of the strip-shaped hole 42 is the same as the number of the tube body of the metal tube 6, the interval of the strip-shaped holes 42 is the same as the interval of a plurality of furnace tubes arranged in parallel at equal intervals of the metal tube 6, and the width of each strip-shaped hole 42 is matched with the outer diameter dimension of a plurality of furnace tubes arranged in parallel at equal intervals of the metal tube 6.

(18) The hole-type tube clamp 1 is of a symmetrical structure and is cast in a symmetrical shape during manufacturing, as shown in FIGS. 4 and 5, specifically including two clamping parts arranged symmetrically, the two clamping parts are respectively provided with a central connecting plate and a plurality of parallel semi-circular docking units 11 which are arranged symmetrically on both sides of the central connecting plate, and the number of semi-circular docking units 11 of each clamping part is the same as the number of furnace tube bodies of the metal tube 6; the central position of each semi-circular docking unit 11 is provided with semi-circular holes of the same size and shape respectively, and the size and shape of each semi-circular hole is the same as the outer diameter dimension and cross-sectional shape of the furnace tube body of the metal tube 6; and two clamping parts are docked to form a tube clamp with a plurality of circular mounting holes 12. A mounting bolt 13 is respectively arranged between each semi-circular docking unit 11 of a clamping part, and the other clamping part is provided with a mounting hole for fitting with the mounting bolt, and after the two clamping parts are docked, fixed connection is achieved through the mounting bolt 13 and the mounting holes. The inner diameter dimension of the semi-circular docking unit 11 is the same as the outer diameter dimension of each single furnace tube of the vertical tube section 61 to be clamped.

(19) In the present embodiment, as a preferred solution, the hole-type tube clamp 1, the anti-friction box 2, the anti-friction cover 3 and the comb plate are all made of stainless steel.

(20) As to the high-temperature reheater anti-friction device of the present invention, through adding an anti-friction box and an anti-friction cover, the furnace tube within the effective blowing radius of the soot blower can be closed, and an anti-friction cover is added synchronously at the outermost furnace tube of the metal tube, thereby effectively avoiding damage to the furnace tube caused by blowing of a soot blower; at the same time, when an improved hole-type tube clamp is adopted and a comb plate is added, the tubes can be prevented from being out of rank and uneven interval of adjacent tube screens can be prevented. The systematic high-temperature reheater anti-friction device can effectively reduce scouring and abrasion of the flue gas and the soot blower on the furnace tube, and extend the operating life of the high-temperature reheater tube.

(21) The above is merely a specific implementation of the present invention, but the protection scope of the present invention is not limited hereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall all fall within the protection scope of the claims.