CN105626169B - A kind of low back pressure welding exhaust casing of industrial steam turbine - Google Patents

Abstract

It is an object of the invention to provide one kind both can enter steam pipe net with steam discharge, and the low back pressure of dual-purpose reliable efficiently industrial steam turbine that can enter condenser with steam discharge again welds exhaust casing, to ensure the reliable Effec-tive Function of low back pressure unit.The welding exhaust casing includes exhaust casing upper half and exhaust casing lower half：Exhaust casing upper half and exhaust casing lower half are formed by plate, pipe and block welding respectively.Not only intensity is high for the low back pressure exhaust casing of the present invention, and rigidity is big, and good manufacturability, structure is simplified, and crushing is small, efficiency high.The low back pressure exhaust casing of the present invention not only can more broadly meet the requirement of different exhaust modes, and inherit the advantages of back pressure type steam discharge cylinder structure is simplified.

Description

An industrial steam turbine low back pressure welded exhaust cylinder

technical field

The invention relates to a steam turbine, in particular to an industrial steam turbine low back pressure welded exhaust cylinder.

Background technique

According to the steam exhaust method, steam turbines can be divided into back pressure steam turbines and condensing steam turbines: back pressure steam turbines have high exhaust pressure, small exhaust area and simple structure; condensing steam turbines have low exhaust pressure, large exhaust area and simple structure complex. For low back pressure steam turbines whose exhaust steam pressure is between the conventional back pressure type and the conventional condensing type, the exhaust steam can enter both the steam pipe network and the condenser. Back pressure exhaust cylinder.

Contents of the invention

The purpose of the present invention is to provide an industrial steam turbine low back pressure welded steam exhaust cylinder that can exhaust steam into the steam pipe network and into the condenser, so as to ensure the reliable and efficient operation of the low back pressure unit. The welded exhaust cylinder of the invention has wide application range, strong universal type, high strength, high rigidity, good manufacturability, simple structure, small pressure loss and high efficiency.

In order to achieve the above-mentioned purpose, the technical solution adopted in the present invention is: an industrial steam turbine low back pressure welded exhaust cylinder, including the main body of the exhaust cylinder, the exhaust port 33 is arranged under the main body of the exhaust cylinder, and the front wall is provided with the upper and middle sides of the steam turbine. Compress the steam inlet of the cylinder body, and the rear wall is provided with a steam seal connection port. The steam inlet includes an upper arch 18 and a lower arch 31, the seal body connection port includes an upper seal block 16 and a lower seal block 25, and the main body of the exhaust cylinder includes a welded upper part and a welded lower part, The sides of the upper and lower parts are welded, and the left and right ends of the welding seam are connected by bolts, and the lower part is provided with a steam sealing and leaking pipe 28, and one end of the sealing and leaking pipe is connected to the sealing body provided below the connecting port of the steam sealing body. The steam leakage hole, the other end communicates with the sealing steam leakage hole provided on the front wall of the lower part.

Further, the upper part is arched as a whole, the upper part of the upper part is an arched upper cover 12, and the arched outer cover is provided with a long groove 19, and the long groove extends from the front edge of the arched upper cover 12 to the steam The sealing body connection port, the front side of the arched upper cover 12 is provided with an arched front wall 13, and the lower part of the arched front wall 13 is an upper arched part 18, and the lower part of the upper cover is provided with a support slant plate 14, and the support slant plate 14 The upper edge of the upper part is supported on the lower surface of the arched upper cover, and the lower edge is fixed above the upper rear wall 11 in the upper part. The upper part is provided with an upper seal block 16 at the position corresponding to the connection port of the seal body, and the upper seal block 16 is A support plate 17 is provided, the upper end of the support plate 17 is supported on the slant plate surface 14, the lower end of the support plate 17 is fixed on the upper steam seal block 16, and the upper connecting surface 15 extending transversely is provided at the side joint of the upper part, and the upper connecting Surface 15 is provided with upper bolt holes.

As a further improvement, the lower part has a square shape as a whole, and the lower part is surrounded by a lower arched part 21, a lower arched part 34, a lower arched part 22 and a lower arched part 23; There is a main connection block 26 for connecting the receiving device, and a lower seal block 25 is provided on the lower part corresponding to the lower edge of the seal body connection port, the lower seal block 25 is adapted to the upper seal block 16, and the steam exhaust port The outer side is provided with a support frame 32 below the support frame 32, which is connected to the secondary connection block 30 of the receiving device, and the lower part is provided with a support plate 27 for supporting. The support plate 27 includes a support plate connecting the front and rear walls and connecting the left and right sides. wall support plate. The support plates connecting the left and right walls are provided with support columns 29 on the left and right, and the two ends of the support columns 29 are respectively supported and fixed on the front and rear walls of the lower part 2 .

The advantages and beneficial effects of the present invention are: the exhaust steam of the welded exhaust cylinder of the present invention can not only enter the steam pipe network, but also enter the condenser, has a wide range of applications, is strong in general use, and has high strength, high rigidity, and good manufacturability. Simple structure; small pressure loss and high efficiency.

Description of drawings

Fig. 1 is a perspective view of the present invention.

Figure 2 is a schematic structural view of the upper part.

Figure 3 is a schematic diagram of the internal structure of the upper part.

Fig. 4 is a schematic diagram of the back structure of the upper part.

Fig. 5 is a structural schematic diagram of the lower part.

Figure 6 is a schematic diagram of the internal structure of the lower part.

Fig. 7 is a schematic diagram of the back structure of the lower part.

Fig. 8 is a schematic diagram of the bottom structure of the lower part.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

As shown in Figures 1 to 7, a specific embodiment of the present invention is: an industrial steam turbine low back pressure welded exhaust cylinder, comprising an exhaust cylinder main body, characterized in that an exhaust port 33 is provided below the exhaust cylinder main body, and the front The wall is provided with a steam inlet connected to the high and medium pressure cylinder of the steam turbine, and the rear wall is provided with a steam seal connection port. The steam inlet includes an upper arch 18 and a lower arch 31; and the main body of the exhaust cylinder includes a welded upper part 1 and the welded lower part 2, the upper and lower parts are welded on the sides, and the left and right ends of the welding seam are connected by bolts; the lower part is provided with a steam sealing and leaking pipe 28, and one end of the steam sealing and leaking pipe 28 is connected The steam seal leakage hole provided under the connection port of the steam seal body is connected to the steam seal leakage hole provided on the front wall of the lower part 2 at the other end.

The upper part is arched as a whole, the upper part of the upper part 1 is an arched upper cover 12, and the arched outer cover is provided with a long groove 19, and the long groove extends from the front edge of the arched upper cover 12 to the steam seal body Connecting port, the front side of the arched upper cover is provided with an arched front wall 13, and the lower part of the arched front wall 13 is an upper arch 18, and the lower part of the arched upper cover 12 is provided with a support slant plate 14, and the support slant plate 14 The upper edge of the upper part is supported on the lower surface of the arched upper cover 12, and the lower edge is fixed above the rear wall 11 in the upper part 1. The upper part 1 is provided with an upper seal block 16 at the position corresponding to the connection port of the seal body, and the upper seal block 16 is provided with a support plate 17, the upper end of the support plate 17 is supported on the slant plate surface 14, the lower end of the support plate 17 is fixed on the upper steam seal block 16, and the side connection of the upper part 1 is provided with a horizontally extending upper connection surface 15 , The upper connection surface 15 is provided with upper bolt holes.

The lower part 2 is square as a whole, and the lower part is surrounded by a lower arched part 21, a lower arched part 34, a lower arched part 22 and a lower arched part 23; Connect the main connection block 26 of the receiving device, and the lower part 2 is provided with a lower seal block 25 at the lower edge of the corresponding seal body connection port, the lower seal block 25 is adapted to the upper seal block 16, and the outer side of the steam exhaust port The bottom is provided with a support frame 32, the sub-connection block 30 of the receiving device is connected below the support frame 32, and the support plate 27 for supporting is provided in the lower part. The support plate 27 includes a support plate connecting the front and rear walls and connecting the left and right walls. The support plate connecting the left and right walls is provided with support columns 29 on the left and right, and the two ends of the support column 29 are respectively supported and fixed on the front and rear walls of the lower part 2.

Claims (2)

1. An industrial steam turbine low back pressure welded exhaust cylinder, comprising an exhaust cylinder main body, characterized in that: a steam exhaust port is provided below the exhaust cylinder main body, and a steam inlet connected to a steam turbine high and medium pressure cylinder is provided on the front wall, and the rear The wall is provided with a seal body connection port, the steam inlet includes an upper arch and a lower arch, the seal body connection port includes an upper seal block and a lower seal block, and the main body of the exhaust cylinder includes a welded upper part and a welded The upper and lower parts are welded on the sides, and the left and right ends of the welding seam are connected by bolts. The lower part is equipped with a steam sealing and leaking pipe, and one end of the sealing and leaking pipe is connected to the bottom of the connecting port of the steam sealing body. The steam sealing leak hole provided, the other end communicates with the steam sealing leak hole provided on the front wall of the lower part; the upper part is arched as a whole, the upper part of the upper part is an arched upper cover, and the There are long slots, and the long slots extend from the front edge of the arched upper cover to the connection port of the steam seal body. The front side of the arched upper cover is provided with an arched front wall, and the upper arch is below the edge of the arched front wall. The lower part of the arched upper cover is provided with a support slant plate, the upper edge of the support slant plate is supported on the lower surface of the arched upper cover, the lower edge is fixed above the upper rear wall in the upper part, and the upper part is connected to the steam seal There is an upper steam seal block at the mouth position, and a first support plate is arranged on the upper steam seal block. The edge connection is provided with a laterally extending upper connection surface, and the upper connection surface is provided with an upper bolt hole. 2. An industrial steam turbine low back pressure welded exhaust cylinder according to claim 1, characterized in that: the lower part is in a square shape as a whole, and the square shape of the lower part is surrounded by a first lower arched part, a second The lower arch, the third lower arch and the fourth lower arch; the rear wall of the lower part is provided with a main connection block for connecting the receiving device, and the lower edge of the corresponding seal body connection port is set on the lower part. There is a lower steam seal block, the lower steam seal block is adapted to the upper steam seal block, a support frame is provided under the outer side of the steam exhaust port, and a secondary connection block for connecting the receiving device is provided under the support frame, and a support frame is provided in the lower part. The second support plate, the second support plate includes the second support plate connecting the front and rear walls and the second support plate connecting the left and right walls, the second support plate connecting the left and right walls is provided with support columns on the left and right, and the support columns The two ends are respectively fixed on the front wall and the rear wall of the lower part, and the support column is supported between the front and rear walls of the lower part.