CN217329755U

CN217329755U - Unequal-wall-thickness water storage tank applied to starting system of direct-current boiler

Info

Publication number: CN217329755U
Application number: CN202220798014.2U
Authority: CN
Inventors: 李剑冰
Original assignee: Harbin Boiler Co Ltd
Current assignee: Harbin Boiler Co Ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-08-30
Anticipated expiration: 2032-04-07

Abstract

The utility model provides a be applied to the water storage tank of wall thickness that varies of once-through boiler starting system belongs to water storage tank technical field. The utility model relates to a be applied to wall thickness water storage tank that varies of once-through boiler starting system, including pipe shaft one and pipe shaft two, wherein, the internal diameter of pipe shaft one and pipe shaft two is the same, and the external diameter of pipe shaft one and pipe shaft two is different, and pipe shaft one and pipe shaft two pass through butt welding fixed component stack shell. The utility model relates to a be applied to wall thickness storage tank that varies of once-through boiler starting system, simple structure, effectual partial stack shell wall thickness that has reduced spherical head wall thickness, under the highest parameter operating mode of present world operation boiler, the wall thickness equal wall thickness stack shell attenuate more than 20mm of spherical head and less external diameter stack shell, the total mass of wall thickness storage tank that varies wall thickness storage tank total mass ratio is lighter by about 20%; the wall thickness at the butt welding seam is reduced by more than 20mm, so that the welding workload is reduced.

Description

Unequal-wall-thickness water storage tank applied to starting system of direct-current boiler

Technical Field

The utility model relates to a be applied to the water storage tank of wall thickness that varies of once-through boiler starting system belongs to water storage tank technical field.

Background

In recent years, the power industry in China is continuously and rapidly developed, the unit grade is improved to high-efficiency ultra-supercritical parameters, the cylinder body of the water storage tank is thicker and thicker along with the improvement of boiler parameters, and the cylinder body and the spherical end socket of the water storage tank are of equal thickness, so that the metal consumption is larger, and the welding workload is large. In fact, pipe joints on the water storage tank are fewer, except for a small section of the cylinder body needing reinforcement, the cylinder body and the spherical end socket of other parts do not need large wall thickness, and the water storage tank with the same wall thickness has serious metal use waste on the two parts of the cylinder body and the spherical end socket. This design adopts the wall thickness stack shell scheme that varies, adopts the circular seamless steel pipe butt welding of heavy-calibre as the stack shell of two sections wall thicknesses that vary of internal diameter the same, the external diameter is different, adopts the stack shell of one section great external diameter at the stack shell section that needs the reinforcement, adopts the stack shell of less external diameter at the stack shell section that does not need reinforcement and, and spherical head is according to the design of less external diameter stack shell specification, and this scheme is on the basis that satisfies water storage tank strength requirement. The thickness of partial cylinder body and the spherical end socket is reduced, the metal consumption is effectively reduced, and the welding workload is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior art and further providing a water storage tank with unequal wall thickness applied to a starting system of a once-through boiler.

The utility model aims at realizing through the following technical scheme:

the water storage tank comprises a first pipe body and a second pipe body, wherein the inner diameters of the first pipe body and the second pipe body are the same, the outer diameters of the first pipe body and the second pipe body are different, and the first pipe body and the second pipe body are fixed through butt welding to form a cylinder body.

The utility model relates to a be applied to wall thickness water storage tank that varies of once-through boiler starting system, wall thickness water storage tank still includes spherical head, and spherical head fixes at the both ends of stack shell.

The utility model relates to a be applied to the wall thickness water storage tank that varies of once-through boiler starting system, the size of spherical head is the same with the less external diameter of pipe shaft one and pipe shaft two.

The utility model relates to a be applied to the wall thickness water storage tank that varies of once-through boiler starting system, pipe shaft one and pipe shaft two adopt circular seamless steel pipe.

The utility model relates to a be applied to wall thickness water storage tank that varies of once-through boiler starting system, under high-efficient supercritical parameter, the external diameter difference of pipe shaft one and pipe shaft two is 20 ~ 25 mm.

The utility model relates to a be applied to wall thickness storage tank that varies of once-through boiler starting system, simple structure, effectual partial stack shell wall thickness that has reduced spherical head wall thickness, under the highest parameter operating mode of present world operation boiler, the wall thickness equal wall thickness stack shell attenuate more than 20mm of spherical head and less external diameter stack shell, the total mass of wall thickness storage tank that varies wall thickness storage tank total mass ratio is lighter by about 20%; the wall thickness at the butt welding seam is reduced by more than 20mm, so that the welding workload is reduced.

Drawings

Fig. 1 is a schematic structural view of a water storage tank with different wall thicknesses applied to a starting system of a once-through boiler according to the present invention.

The reference number in the figure, 1 is a pipe body I; and 2 is a second tube body.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

The first embodiment is as follows: referring to fig. 1, the water storage tank with unequal wall thickness applied to the start-up system of the once-through boiler according to the present embodiment includes a first pipe body and a second pipe body, wherein the first pipe body and the second pipe body have the same inner diameter, the first pipe body and the second pipe body have different outer diameters, and the first pipe body and the second pipe body are fixed by butt welding to form a barrel body.

The water storage tank with unequal wall thickness also comprises spherical sealing heads which are fixed at two ends of the cylinder body.

The size of the spherical end socket is the same as the smaller outer diameter of the first pipe body and the second pipe body. Because the internal diameters of the two sides of the cylinder body are the same, the spherical sealing heads are fixed on the two sides of the cylinder body as long as the internal diameters are fixed with the cylinder body, and the size of the outer sides of the spherical sealing heads is the same as the smaller external diameter of the cylinder body, so that the two sides are kept uniform.

The first pipe body and the second pipe body are circular seamless steel pipes. The first pipe body and the second pipe body are made of seamless steel pipes and are fixed at the joint of the first pipe body and the second pipe body through welding.

The difference between the outer diameters of the first pipe body and the second pipe body is 20-25 mm.

Example two: as shown in fig. 1, the unequal wall thickness water storage tank applied to the once-through boiler starting system according to the present embodiment includes: the upper part and the lower part of the water storage tank are provided with spherical end sockets, and the middle part of the water storage tank is welded and spliced by two sections of circular seamless steel pipes with different wall thicknesses and large calibers and the same inner diameter to form a cylinder body; the inner diameters of the cylinder bodies are the same so as to ensure that the flow field of a medium in the cylinder bodies is not influenced, the cylinder body section needing reinforcement adopts a cylinder body with a larger outer diameter to increase the wall thickness so as to meet the strength requirement, and the cylinder body section needing no reinforcement adopts a cylinder body with a smaller outer diameter to reduce the metal consumption and the welding workload.

The thinning amount of the thin-wall cylinder body is changed compared with that of the thick-wall cylinder body, the approximate range of the thinning amount under the high-efficiency supercritical parameter is 20-25 mm, but the scheme is applicable under other parameter conditions, so the thinning amount is not fixed; the scheme is characterized in that the barrel body is formed by welding two sections, a thin barrel body (the inner diameter is the same and the outer diameter is small) is adopted in a region without reinforcement, and a thick barrel body (the inner diameter is the same and the outer diameter is larger) is adopted in a region needing reinforcement, so that the metal consumption and the manufacturing difficulty are reduced, and other structures are the same as those of a conventional water storage tank.

The utility model discloses a that my company's staff independently develops the design and develops is when satisfying the intensity requirement through the welding of waiting for different times on the basis of original product, can reduce the metal consumption, has good economic benefits and market latent value, in order to avoid this scheme to receive the situation of being made in people when follow-up production is sold, the utility model discloses apply this specially.

The application relates to a working process of a water storage tank with unequal wall thickness, which is applied to a starting system of a once-through boiler, and comprises the following steps: the separator is an important and necessary component of the built-in starting system of the once-through boiler and is used for controlling the drainage, the recirculation and the storage of water separated by the separator at the initial stage of starting. In operation, the upper part of the storage water tank is a steam space, the lower part of the storage water tank is a water space, and in the initial starting stage, the water separated by the separator is introduced into the water tank and is led out through the water at the lower part of the water tank according to the height of the water level in the water tank. Because the medium in the upper and lower inner spaces of the water storage tank is different, the strength requirement in the water tank is different, so the water storage tank formed by welding with unequal wall thicknesses does not influence the normal use, can reduce the metal loss and save the energy.

The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The water storage tank with the unequal wall thicknesses is applied to a once-through boiler starting system and is characterized by comprising a first pipe body (1) and a second pipe body (2), wherein the inner diameters of the first pipe body (1) and the second pipe body (2) are the same, the outer diameters of the first pipe body (1) and the second pipe body (2) are different, and the first pipe body (1) and the second pipe body (2) are fixed through butt welding to form a cylinder body.

2. The water storage tank with unequal wall thickness for the start-up system of the once-through boiler as claimed in claim 1, wherein the water storage tank with unequal wall thickness further comprises spherical end sockets fixed at both ends of the cylinder body.

3. The variable wall thickness water storage tank applied to the once-through boiler starting system according to claim 2, wherein the size of the spherical head is the same as the smaller outer diameter of the first pipe body (1) and the second pipe body (2).

4. The variable wall thickness water storage tank for once-through boiler starting system according to claim 2, wherein the first pipe body (1) and the second pipe body (2) are circular seamless steel pipes.

5. The variable wall thickness water storage tank applied to the once-through boiler starting system according to claim 2, wherein the difference between the outer diameters of the first pipe body (1) and the second pipe body (2) is 20-25 mm under the efficient supercritical parameter.