CN106196587B

CN106196587B - Water return device of hot water boiler

Info

Publication number: CN106196587B
Application number: CN201610793020.8A
Authority: CN
Inventors: 陈巧巧; 杨国娟; 郑琰; 廖兵兵; 周加慧; 刘杰
Original assignee: Zhejiang Tefu Development Co ltd
Current assignee: Zhejiang Tefu Development Co ltd
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2021-10-26
Anticipated expiration: 2036-08-30
Also published as: CN106196587A

Abstract

The invention discloses a water return device of a hot water boiler, which comprises a boiler body with a water outlet pipe and a water inlet pipe, wherein a combustion cavity and a heat exchange cavity arranged at the upper part of the combustion cavity are arranged in the boiler body; the position that preceding tube sheet was hugged closely on burning chamber upper portion is equipped with the arc passageway around the burning chamber setting, and the arc passageway has first end and the second end relative with first end, and the inlet tube communicates with the first end of arc passageway, and the arc passageway is pressed close to preceding tube sheet one end and is opened towards the heat exchange tube direction and put and have convex delivery port. By adopting the structure, water flowing into the arc-shaped channel from the water inlet pipe flows in from the arc-shaped water outlet along the side wall of the front tube plate in a jet mode, low-temperature water flows into the welding part on the side wall of the front tube plate and is fully contacted with the welding part, so that the temperature of the front tube plate can be effectively reduced, the problem that the welding part of the heat exchange pipe and the front tube plate is cracked due to high temperature is avoided, and the service life of the hot water boiler is prolonged.

Description

Water return device of hot water boiler

Technical Field

The invention relates to a water return device of a hot water boiler, and belongs to the field of boiler structural design.

Background

The boiler is an energy conversion device, the energy input into the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The boiler is originally a water container heated on fire, a furnace refers to a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The boiler for supplying hot water is called a hot water boiler, is mainly used for life, and has a small amount of application in industrial production. The boiler for generating steam is a steam boiler, often referred to as boiler for short, and is mainly used for thermal power stations, ships, locomotives and industrial and mining enterprises.

The structure of the existing hot water boiler is that a water inlet and a water outlet on a boiler body are mostly arranged at the middle position on the boiler body, low-temperature water flows into a water cavity in the boiler body through the water inlet, hot air in the boiler body heats water in the water cavity through heat released by a heat exchange tube, and hot water flows out through the water outlet. The problem that this kind of boiler exists, front tube plate department temperature is very high, and the low temperature water that flows in can not carry out effective cooling to front tube plate, consequently, leads to the welding seam of heat exchange tube and front tube plate junction to receive high temperature easily and influence the fracture to boiler's life has been influenced.

Disclosure of Invention

Therefore, the invention aims to provide the water return device of the hot water boiler with a reasonable structure, which can effectively reduce the temperature of the front tube plate and further avoid the problem that the welding part of the heat exchange tube and the front tube plate is cracked due to the influence of high temperature, thereby prolonging the service life of the hot water boiler.

The technical scheme for realizing the purpose of the invention is as follows:

a water return device of a hot water boiler comprises a boiler body with a water outlet pipe and a water inlet pipe, wherein a combustion cavity and a heat exchange cavity arranged at the upper part of the combustion cavity are arranged in the boiler body; the position that burning chamber upper portion hugs closely preceding tube sheet is equipped with the arc passageway that sets up around the burning chamber, the arc passageway has first end and the second end relative with first end, the inlet tube with the first end intercommunication of arc passageway, the arc passageway is pressed close to preceding tube sheet one end orientation the heat exchange tube direction is opened and is put there is convex delivery port.

In the above technical scheme, from the first end to the second end, the width of the arc-shaped water outlet is gradually increased and then gradually decreased.

In the above technical scheme, the arc-shaped water outlet is of a stepped structure with gradually increasing width and then gradually decreasing width.

In the technical scheme, the position of the combustion cavity corresponding to the arc-shaped channel is inwards recessed to form an annular concave part, an arc-shaped coaming plate is fixedly arranged in the annular concave part, the bottom wall, the front side wall and the rear side wall of the annular concave part and the arc-shaped coaming plate are encircled to form the arc-shaped channel, and the arc-shaped water outlet is formed in one side edge of the arc-shaped coaming plate close to the front tube plate.

In the above technical solution, the front tube plate is formed by extending a front side wall of the annular recess radially outward.

In the technical scheme, the front side wall and the rear side wall of the annular concave part are respectively fixedly welded with a first overlapping plate and a second overlapping plate, and the edges of two sides of the arc-shaped coaming are respectively fixedly connected with the first overlapping plate and the second overlapping plate.

In the technical scheme, one side edge of the arc-shaped coaming is lapped and welded and fixed with the first lapping sheet, and the other side edge of the arc-shaped coaming is lapped and fixed with the second lapping sheet through the fastening bolt.

Among the above-mentioned technical scheme, the inlet tube is the big little tubular structure in inner of outer end, the inlet tube middle part has relative first rake and the second rake that sets up, first rake with the dislocation of second rake sets up, the outer end of inlet tube is equipped with flange.

In the technical scheme, the upper part of the furnace body is provided with a manhole device, and a manhole reinforcing ring is arranged at the manhole device.

The invention has the positive effects that: (1) in the invention, an arc-shaped channel arranged around the combustion chamber is arranged at the position of the upper part of the combustion chamber, which is tightly attached to the front tube plate, the arc-shaped channel is provided with a first end and a second end opposite to the first end, the water inlet pipe is communicated with the first end of the arc-shaped channel, the arc-shaped channel is provided with an arc-shaped water outlet towards the direction of the heat exchange tube close to one end of the front tube plate, by adopting the structure, water flowing into the arc-shaped channel from the water inlet pipe flows in from the arc-shaped water outlet along the side wall of the front tube plate in a jet mode, the whole plate surface of the front tube plate can be washed at the first time after low-temperature water flows in, the low-temperature water is fully contacted with the welding part on the side wall of the front tube plate, and the temperature of the front tube plate can be effectively reduced, and then avoid heat exchange tube and preceding tube sheet weld receive the problem that high temperature influences and ftracture, restrain the phenomenon of high temperature scale deposit simultaneously to the life of extension hot water boiler.

Drawings

FIG. 1 is a partial view of a water returning device of a hot water boiler according to the present invention;

FIG. 2 is a partial view of the arcuate channel of the present invention;

FIG. 3 is an enlarged partial view at B of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a front view of the present invention with the curved panel flattened;

fig. 6 is a structural view of a water inlet pipe in the present invention.

The reference symbols shown in the figures are: 1-water inlet pipe; 11-a first inclined portion; 12-a second inclined portion; 2-furnace body; 3-a combustion chamber; 31-an annular recess; 311-bottom wall; 312-a front sidewall; 313-rear sidewall; 4-a heat exchange chamber; 41-heat exchange tube; 5-front tube plate; 6-an arc-shaped channel; 61-a first end; 62-a second end; 63-arc shaped water outlet; 7-arc coaming; 8-a first strap; 9-a second strap; 10-fastening bolts.

Detailed Description

The specific structure of the invention is described below with reference to the accompanying drawings:

a water return device of a hot water boiler, as shown in fig. 1 to 5, which comprises a boiler body 2 with a water outlet pipe and a water inlet pipe 1, wherein a combustion chamber 3 and a heat exchange chamber 4 arranged at the upper part of the combustion chamber 3 are arranged in the boiler body 2, a heat exchange pipe 41 is arranged in the heat exchange chamber 4, and the front end of the heat exchange pipe 41 is connected with a front pipe plate 5 of the combustion chamber 3 and is communicated with the combustion chamber 3; 3 upper portions in combustion chamber are hugged closely the position of preceding tube sheet 5 is equipped with the arc passageway 6 that sets up around combustion chamber 3, arc passageway 6 has first end 61 and holds 62 with the second that first end 61 is relative, inlet tube 1 with the first end 61 intercommunication of arc passageway 6, arc passageway 6 is pressed close to preceding tube sheet 5 one end orientation heat exchange tube 41 direction is opened there is convex delivery port 63 to low-temperature water erupts through convex delivery port 63 and forms convex rivers, washes away preceding tube sheet 5 comprehensively. By adopting the structure, water flowing into the arc-shaped channel 6 from the water inlet pipe 1 flows in along the side wall of the front tube plate 5 through the arc-shaped water outlet 63, low-temperature water flows in to scour the whole plate surface of the front tube plate 5 and fully contact with the welding part on the side wall of the front tube plate 5, so that the temperature of the front tube plate 5 can be effectively reduced, the problem that the welding part of the heat exchange pipe 41 and the front tube plate 5 is cracked due to high temperature is avoided, and meanwhile, the phenomenon of high-temperature scaling is inhibited, so that the service life of the hot water boiler can be effectively prolonged.

Because the heat exchange tubes 41 are arranged in a fan shape in the heat exchange cavity 4, in order to ensure that the water flow sprayed out from the circular arc-shaped water outlet 63 can fully contact with all the heat exchange tubes 41 and the welding parts of the front tube plate 5 along the side wall of the front tube plate 41, and effectively reduce the temperature of the front tube plate 5, the present embodiment is provided with: from the first end 61 to the second end 62, the width of the circular arc-shaped water outlet 63 gradually increases and then gradually decreases.

Further, the arc-shaped water outlet 63 is of a stepped structure (see fig. 5) with a gradually increasing width and a gradually decreasing width, and the adoption of the structure is beneficial to fixing the arc-shaped enclosing plate 7 and forming the arc-shaped channel 6.

Referring to fig. 2 and 3, in this embodiment, the position of the combustion chamber 3 corresponding to the arc-shaped channel 6 is recessed inwards to form an annular recess 31, an arc-shaped enclosing plate 7 is disposed and fixed in the annular recess 31, a bottom wall 311, a front side wall 312, a rear side wall 313 of the annular recess 31 and the arc-shaped enclosing plate 7 enclose to form the arc-shaped channel 6, and the arc-shaped water outlet 63 is disposed on one side edge of the arc-shaped enclosing plate 7 close to the front tube plate 5.

Further, the front tube plate 5 is formed by extending the front side wall of the annular recess 31 radially outward, so that the circular arc-shaped water outlet 63 can be ensured to be close to the front tube plate 5 sufficiently.

In order to mount the arc-shaped coaming 7, a first overlapping flap 8 and a second overlapping flap 9 are respectively welded and fixed on the front side wall 312 and the rear side wall 313 of the annular concave part 31 of the embodiment, and two side edges of the arc-shaped coaming 7 are respectively fixedly connected with the first overlapping flap 8 and the second overlapping flap 9.

And furthermore, one side edge of the arc-shaped coaming 7 is lapped and welded and fixed with the first lapping sheet 8, and the other side edge is lapped and fixed with the second lapping sheet 9 through the fastening bolt 10, by adopting the structure, when the arc-shaped coaming 7 is installed, the two side edges of the arc-shaped coaming 7 are lapped on the first lapping sheet 8 and the second lapping sheet 9, then one side edge of the arc-shaped coaming 7 is fixed through the fastening bolt 10, the other side edge is tightly abutted against the second lapping sheet 8, and finally, the arc-shaped coaming 7 can be firmly fixed through welding (plug welding).

As shown in fig. 6, the water inlet pipe 1 in this embodiment is a tubular structure with a large outer end and a small inner end, the middle of the water inlet pipe 1 is provided with a first inclined portion 11 and a second inclined portion 12 which are oppositely arranged, the first inclined portion 11 and the second inclined portion 12 are arranged in a staggered manner, and the outer end of the water inlet pipe 1 is provided with a connecting flange, so as to adapt to the welding installation of the water inlet pipe 1, and improve the convenience and reliability of the installation of the water inlet pipe 1.

Further, 2 upper portions of furnace body are provided with the manhole device to set up the manhole reinforcement circle in manhole device department welding, through 1 thickness of furnace body of manhole reinforcement circle thickening relevant position, with the intensity of reinforcing manhole device department.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.

Claims

1. The water return device of the hot water boiler comprises a boiler body (2) with a water outlet pipe and a water inlet pipe (1), wherein a combustion cavity (3) and a heat exchange cavity (4) arranged at the upper part of the combustion cavity (3) are arranged in the boiler body (2), a heat exchange pipe (41) is arranged in the heat exchange cavity (4), and the front end of the heat exchange pipe (41) is connected with a front pipe plate (5) of the combustion cavity (3) and is communicated with the combustion cavity (3); the method is characterized in that: the position of the upper portion of the combustion cavity (3) clinging to the front tube plate (5) is provided with an arc-shaped channel (6) arranged around the combustion cavity (3), the arc-shaped channel (6) is provided with a first end (61) and a second end (62) opposite to the first end (61), the water inlet tube (1) is communicated with the first end (61) of the arc-shaped channel (6), one end of the arc-shaped channel (6) clings to the front tube plate (5) and faces towards the direction of the heat exchange tube (41), an arc-shaped water outlet (63) is formed from the first end (61) to the second end (62), the width of the arc-shaped water outlet (63) is gradually increased and then gradually reduced, the arc-shaped water outlet (63) is of a stepped structure with gradually increased and then gradually reduced, and the position of the combustion cavity (3) corresponding to the arc-shaped channel (6) is inwards recessed to form an annular concave part (31), an arc-shaped coaming plate (7) is fixedly arranged in the annular concave part (31), the bottom wall (311), the front side wall (312) and the rear side wall (313) of the annular concave part (31) and the arc-shaped coaming plate (7) are encircled to form the arc-shaped channel (6), and the arc-shaped water outlet (63) is formed in one side edge, close to the front tube plate (5), of the arc-shaped coaming plate (7).

2. The water returning device of the hot water boiler according to claim 1, wherein the front tube plate (5) is formed by extending a front side wall of the annular recess (31) radially outward.

3. The return water device of the hot water boiler according to claim 1, wherein a first overlapping plate (8) and a second overlapping plate (9) are welded and fixed to a front side wall (312) and a rear side wall (313) of the annular recess (31), and two side edges of the arc-shaped coaming (7) are fixedly connected with the first overlapping plate (8) and the second overlapping plate (9), respectively.

4. A water returning device of a hot water boiler according to claim 3, wherein one side edge of the arc-shaped coaming (7) is overlapped with the first overlapping sheet (8) and is welded and fixed, and the other side edge is overlapped with the second overlapping sheet (9) and then is fastened through a fastening bolt (10).

5. The water return device of the hot water boiler according to claim 1, wherein the water inlet pipe (1) is a tubular structure with a large outer end and a small inner end, the middle part of the water inlet pipe (1) is provided with a first inclined part (11) and a second inclined part (12) which are oppositely arranged, the first inclined part (11) and the second inclined part (12) are arranged in a staggered manner, and the outer end of the water inlet pipe (1) is provided with a connecting flange.

6. A water returning device of a hot water boiler according to claim 1, wherein a manhole device is provided at an upper portion of the boiler body (2), and a manhole reinforcing ring is provided at the manhole device.