WO2012139451A1

WO2012139451A1 - Multi-pass cast and forged connection structure for boiler pipe system connection

Info

Publication number: WO2012139451A1
Application number: PCT/CN2012/072609
Authority: WO
Inventors: 赵井冈; 王永新; 李凡; 梁新忠; 刘建斌
Original assignee: 上海锅炉厂有限公司
Priority date: 2011-04-13
Filing date: 2012-03-20
Publication date: 2012-10-18
Also published as: ES2492840B2; CN102393007B; CN102393007A; ES2492840A2; ES2492840R1

Abstract

A multi-pass cast and forged connection structure for boiler pipe system connection, comprising a group of vertical pipes and a group of oblique pipes used for connecting a boiler vertical pipe system. The group of vertical pipes contains a plurality of vertical pipes, all the vertical pipes are in the same plane, and the two ends of each vertical pipe are vertical upward pipe openings (21, 23, 25) and vertical downward pipe openings (22, 24, 26) respectively; the group of oblique pipes contains a plurality of oblique pipes, all of the oblique pipes are in the same plane, and the two ends of each oblique pipe are oblique upward pipe openings (27, 29) and oblique downward pipe openings (20, 28) respectively; and a plurality of vertical pipes and a number of oblique pipes are set at intervals. The connection structure is able to avoid a large number of space jumping pipes and is helpful for hermetically sealing the boiler furnace, reduce stress and differential expansion caused by system expansion, and improve assembly efficiency.

Description

The invention relates to a structure for the transition and connection between a complex pipe system and a pipe system in a heating surface of a boiler. The invention specifically relates to a 'multi-pass casting forging connection structure for boiler pipe connection>

Shown, an inverted view of the boiler> line interleaved at the interleave each tube is provided at a pipe bend in order to avoid other Jian _S but has the disadvantage that the obliquely arranged at an angle with the vertical piping: piping due to thermal Factors such as surface and system layout cannot be avoided in the tube

Perform space jumps. Since the pipe system is composed of a large number of pipes, i is affected by the pitch between the pipe and the pipe. The number of the effective jump pipe is large, and the jump pipe is complicated and irregular. In addition, a large number of jumpers are dense for the entire boiler.

"Τ'· ϋ· ' -

-丄- H - S f- ..入: : ί:!在^:The piping is tilted

":^„, t 明公幵-- Kind of multi-pass casting and forging connection structure for the pot; ^ ^ connection, to achieve a good transitional influence between the complex pipe system and the pipe system, while improving the internal of the boiler, - , ,;

I ¹ series connected multi-pass casting forging connection

a β-direction pipe group for connecting a vertical pipe system of the boiler, in the vertical pipe group

Pipes All vertical pipes are located in the same plane. Two of each vertical pipe are used to connect the inclined pipe system of the boiler inclined pipe system.

Pipeline, all diagonal pipes are located in the same plane, two of each diagonal pipe. The above vertical pipe is set as a straight pipe _s or a bent pipe, and the diagonal pipe is set as a cross pipe.

The above-mentioned oblique pipe is set as a straight pipe, or a bent pipe, and the vertical pipe is set as a cross pipe _δ

The above vertical pipe group and the oblique pipe group are fixedly connected by casting and forging

The angle between the plane where the oblique pipeline group is located and the plane where the vertical pipeline group is located is

45 ° to 65. between.

The pitch b between the nozzles of the above vertical pipes is between 30 and 70 m.

The pitch c between the orifices of the above-mentioned oblique pipes is between 30 and 70 mm.

The invention has the advantages that the multi-pass casting and forging connecting structure for the boiler pipe connection and the staggering method of the prior art boiler internal pipe have the advantages that the invention adopts the multi-pass casting and forging which is composed of the thousands of pipes and the casting forgings. The connection structure can avoid a large number of space jump tubes; the structure is simple and regular;

The invention adopts a multi-pass casting and forging connection structure, which is beneficial to the boiler furnace seal _f herein, and can also limit the displacement reduction stress and the expansion difference caused by the system expansion;

The invention adopts a multi-pass casting and forging connection structure, which can greatly improve the in-plant assembly rate of the system components, and explain the illustration

Circle 1 is a schematic diagram of the arrangement of the piping system in the prior art;

2 is a schematic structural view of an eight-way structure embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention;

3 is a schematic structural view of an eight-way structure embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention:

Figure 4 is a side elevational view of an eight-way structural embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention;

Figure 5 is a side elevational view of an eighteen-way structure of a multi-pass casting forging connection structure for a boiler pipe connection according to the present invention;

6 is a B~B side view showing an eight-way structure of a multi-pass casting forging connection structure for a boiler pipe system connection according to the present invention;

Figure 7 is a sixteenth embodiment of a multi-pass casting forging connection structure for boiler pipe system connection of the present invention 8 is a side view of a sixteen-way structure embodiment of a multi-pass casting forging connection structure for a boiler pipe connection according to the present invention;

Figure 9 is a cross-sectional view showing a sixteen-pass structure embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention;

Figure] is a side view of a thirty-two structural embodiment of a multi-pass casting forging connection structure for boiler pipe connection of the present invention;

Figure Γ is a plan view showing a thirty-two structure embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention;

12 is a Β-Β surface view of a thirty-two-way structural embodiment of a multi-pass casting forging connection structure for boiler pipe connection according to the present invention;

The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The invention discloses a multi-pass casting and forging connecting structure for boiler pipe system connection, and adopts a multi-pass casting segment connecting structure in a large number of complex pipe systems and pipe systems at the intersection of the pipes to realize a regular transition transition of the single pipe The different piping systems do not affect the respective transitions within the multi-pass by the connection to the multi-pass casting segments. The multi-pass casting section can adjust the structure of the pipe according to the pitch and quantity of the pipes in each pipe system, so that the entire knot is regularized and simplified.

A multi-pass casting and forging structure for boiler pipe connection, the connection structure adopts a multi-pass casting forging connection structure _5, the connection structure comprises; a vertical pipeline group for connecting a vertical pipe system of the boiler There are thousands of vertical pipes, all of which are located in the same plane, and the ends of each of the rigid pipes are vertical nozzles and vertical nozzles. The connection structure also includes an oblique pipe group for connecting the inclined pipe system of the boiler, and the diagonal pipe group includes all the lower nozzles of the thousands of inclined pipes. S is fixedly connected between the pipe group and the inclined pipe group by casting and forging, and the vertical pipe and the oblique pipe are spaced apart.

As shown in FIG. 2 and FIG. 3, an embodiment of a multi-pass casting forging connection structure for boiler pipe connection is a multi-pass casting forging connection connection of a boiler pipe system connection. Knot The configuration embodiment is an eighteen-pass structure. The structure comprises eighteen nozzles, the pair of nozzles being disposed on each axis on each of the pair of nozzles. It comprises two sets of pipeline groups: a vertical pipeline group and a diagonal pipeline group, wherein the five pairs of pipelines are vertical pipelines for connecting the vertical pipeline system of the boiler, the five pairs of vertical pipelines are arranged straight, and all the vertical pipelines are located In the same plane, the two ends of the vertical pipe are the vertical nozzle and the vertical pipe nozzle respectively> and the remaining four pairs of pipes are the oblique pipes for connecting the inclined pipe system of the boiler, the pair of diagonal pipes It is arranged obliquely, and all the inclined pipes are located in the same flat pipe, and the two ends of the inclined pipe are the oblique upward pipe and the oblique downward pipe respectively. The axial direction of the vertical pipeline group forms an angle with the axial direction of the oblique pipeline group. The respective nozzles in the structural member are fixed together with the corresponding pipelines by metal castings and forgings, and the structure is firm. The structural structure of the forged rafter is continuous and smooth in the connection between the nozzle and the nozzle. It is convenient for the connection of the multi-pass casting and forging of the boiler tube system to be connected to the inside of the boiler. The pipe in the pipe system is retracted.

The side view _{s of the} embodiment of the multi-pass casting forging connection structure of the eighteen-way for the boiler pipe connection as shown in circle 4 is shown in the figure as shown in the figure, the longitudinal Α, -A face and is provided between a horizontal plane at right angles to the inclined plane and the horizontal angle BB a _f a is the angle ²⁵ ϋ ~45 ^(:.. between the same time, the angle β Α-Α surface and the plane is 45 Beta Beta Between ^{G and} 65 ^Q

As shown in FIG. 5 and FIG. 6, which shows through the eighteen-sectional view of a boiler tube surface and the plane BB through eighteen for connection to the boiler tubing connecting structure of the multi-way casting and forging _¥ seen from FIG. The connected multi-pass casting forging connection structure is a symmetrical structure. Α,·Α面图 and B~B surface view> The vertical nozzle 21 corresponds to the vertical downward nozzle 22, and the two nozzles 21 and 22 are connected by a pipe 2, which is a straight line pipeline. The upper nozzle port 23 corresponds to the vertical downward nozzle 24, and the two nozzles 23 and 24 communicate through the conduit 23 1 . The conduit 231 is the middle portion of the bent conduit conduit 23 1 and is connected to the boiler piping system. The central axis of the multi-pass casting forging connection structure is twisted and bent. S the upper nozzle 25 corresponds to the vertical: the lower nozzle 26, and the two nozzles 25 and 26 are connected by a pipe 251, which is a bent pipe, as shown in Fig. 3, the middle of the pipe 25!. Back bending of the multi-pass casting forging connection structure commonly used for boiler pipe connection > Fully utilize the structural space of the casting forging by avoiding the pipe _s which is bent to the middle on both sides. The pitch size of the pipe 21 between the nozzles 21, 22 and the vertical nozzle 23 of the nozzles 23, 24! :? The setting range is between 35-70m > corresponding vertical The pitch between the lower nozzles 22 and 24 is also between 35 and 70 m, and the other nozzles in the A~A view are also set by this rule.

Obliquely on the spout 27, obliquely downward nozzle 28, the nozzle spout obliquely _s central connection 20 between the cross pipe 271 through the lower cross pipe 29 and obliquely ΓΠ together oblique to the connection spout 27 and the swash Two pipes respectively connected under the upper nozzle 29 and one pipe in the middle are divided into two pipes which are respectively connected by the oblique downward pipe port 28 and the oblique downward pipe port 20, respectively, in the middle of the intersecting pipe 271 Inverted separately with pipes 2.! I and 23 Ϊ, a pipe 25 L is provided on the side of the pipe 23 !. The middle of the intersecting pipe 271 is combined into a pipe to avoid the vertical pipes 211 and 231. The pitch size c between the two obliquely upward nozzles 27 and 29 on the intersecting pipe 27! ranges from 35 to 37 rn, and the pitch size between the corresponding oblique downward nozzles 28 and 20 is also Between 35~37mm, B--B view, as shown in Fig. 7, another embodiment of a multi-pass casting forging connection structure for boiler pipe connection, the multi-pass casting forging for boiler pipe connection Connection structure in which the junction is a multi-pass segment> This embodiment is a sixteen-pass structure. The structure includes sixteen nozzles, and the sixteen nozzles correspond to each other.> Each pair of nozzles is disposed on one axis. . It consists of two sets of pipelines, the vertical pipeline group and the pipeline are vertically arranged, and all the vertical pipelines are located in the same 'plane. The vertical pipelines are respectively vertical and vertical nozzles. four pairs of pipes for membership in the inclined pipe connecting the boiler tubing, the four pairs of diagonally arranged pipe obliquely, at the ends of all the pipes obliquely _s the inclined duct in the same plane are oblique tube is provided between the opening angle and the obliquely lower nozzle member by the placement of the structure shown in FIG. ₅ shown in its axial direction vertical to the horizontal plane at right angles to the pipe groups and disposed obliquely in the axial direction and the horizontal tube set the angle a is the angle β> between the vertical and diagonal tube set tubing set between 25 ^ⁱ⁵ ~45 ⁱ⁵ between ⁴⁵ ϋ ~65 present structural member and wherein each nozzle of the corresponding conduit by Lu The metal castings and forgings are fixed together, the structure is firm. The structure of the castings and forgings is regular and smooth. The connection structure between the nozzles and the nozzles is continuous and smooth, which is convenient for the connection structure of multi-pass castings and forgings for boiler pipe connection. Sealed treatment of connected pipes in boiler

As shown in FIG. 8 and FIG. 9, the figure shows the cross-section of the A-side and the B-side of the connection structure of the multi-pass casting forging for the boiler pipe connection of the sixteen-pass, which can be seen from the figure. The connection structure of the multi-pass casting forgings connected to the boiler pipe system is a symmetrical structure. In the AA and BB views, the vertical nozzle 31 corresponds to the vertical nozzle 32 and passes between the two vertical nozzles 31 and the vertical nozzle 32. The pipe 31 is connected; the pipe 31 is a straight pipe. The vertical nozzle 33 corresponds to the vertical downward nozzle 34. The two vertical nozzles 33 and the vertical nozzle 34 communicate with each other through the pipe 331 as a bent pipe, and the middle of the pipe 331 is connected to the present invention. The center line of the structure is laterally bent between the pipe 3! i between the vertical nozzle 31 and the vertical down port 32 and the pipe 33! between the vertical nozzle 33 and the vertical down tube 34 An intersecting duct 39 is provided in an oblique direction, and the middle portion of the duct 331 is bent just to avoid the intersecting duct 39. The setting range of the pitch dimension b between the vertical nozzle 3 1 and the vertical downward nozzle 33 is between 35 and 70 mrn corresponding to S between the lower nozzle: 32 and the vertical downward nozzle 34. The pitch size is between 35- and 70mm, and other nozzles in the same view are also set by this rule.

Oblique upward nozzle 35 _3⁄4 oblique downward nozzle 36 The oblique upward nozzle 37 and the oblique downward nozzle 38 are connected by a cross pipe 39, the central portion of which is connected obliquely upwardly with the nozzle 35 and obliquely upward The two pipes connected to the nozzle 37 are in the middle of the pipe 39 and are formed into a pipe, and then a pipe is divided into two pipes which are respectively connected by the oblique downward pipe port 36 and the oblique downward pipe port 38, and the cross pipe 39 is connected. Pipes 3 1 1 and 331 are respectively disposed on both sides of the middle portion, and the middle portion of the intersecting pipe 39 is combined into a pipe to avoid vertical pipes 31) and 33) obliquely downwardly at the pipe 36 and inclined on the intersecting pipe 39 The pitch dimension e between the downward nozzles 38 ranges between 35 37 mrn, while the pitch between the corresponding oblique upper nozzle 35 and the oblique upward nozzle 37 is also 35 37 mrn, B view The other nozzles in the middle are also set by this rule.

As shown! Shown 0 _s - species to another embodiment for casting and forging multi-way connector connected to the structure of the boiler tube system for multi-casting and forging through boiler tubing connection structure connected through the connection structure of the multi-section element of the present embodiment inverted It is a thirty-two-way structure. The structure comprises thirty-two nozzles, the thirty-two nozzles, two pairs of pairs, each pair of nozzles being disposed on one axis. It comprises two sets of pipelines, namely an S-direction pipeline group and an oblique pipeline group, wherein the pipeline is a vertical pipeline for connecting the vertical piping system of the boiler; the 8 pairs of S are arranged vertically to the pipeline, and all the vertical pipelines Located in the same plane, the two ends of the vertical pipe are the vertical nozzle and the vertical nozzle. The remaining 8 pairs of pipes are the inclined pipes for connecting the inclined pipe system of the boiler. The pipe is diagonally arranged. All the diagonal pipes are located in the same plane. As shown in the placement mode, the longitudinal vertical pipe group is axially at right angles to the horizontal plane; and the inclined diagonal pipe group is disposed between the axial direction and the horizontal plane. There is an angle a., the angle a is between 25 ^{s and} 45 ^e , and it can be seen that the angle β between the S-direction pipe group and the oblique pipe group is between 45 «~65 ^δ . Each of the structural members The pipe joint and the corresponding pipe are fixed by the metal casting and forging in the structure. The structural rule of the casting and forging> The connection structure between the pipe joint and the pipe joint of the casting forging is continuous and smooth, which is convenient for the boiler pipe connection. Sealing treatment of the multi-pass casting forging connection structure and the pipe connected thereto in the boiler

As shown in Fig. 11 and Fig. 12> This figure shows the cross section of the AA plane and the Β and Β planes of the connection structure of the multi-pass casting forgings for the connection of the boiler piping of the 32-way. The multi-pass cast-forged connection structure commonly used for boiler pipe connection is a symmetrical structure. In the top view and the top view, the vertical nozzle 41 corresponds to the vertical down port 42; the vertical nozzle 4] and the vertical direction The lower nozzles 42 are connected by a pipe 4 ii which is a straight pipe. The vertical nozzle 43 corresponds to the vertical downward nozzle 44, and the vertical nozzle 43 and the lower nozzle 44 are connected by a pipe 43 }. The central axis of the pipe 43 is bent. An intersecting duct 49 is provided between the duct 41 1 between the ducts 41 and 42 and the duct 33 between the ducts 43 44, and the duct 43 is bent in the middle to avoid the cross duct 49. The pitch dimension b between the vertical nozzle 41 and the upper nozzle 43 is set between 35 70 mm, corresponding to the pitch size between the vertical down port 42 and the vertical down port 44. The multi-pass casting forgings between 35 and 70 mm are also due to the 32-way multi-pass casting forgings, the oblique upward nozzle 45, the oblique downward nozzle 46, the oblique upward nozzle 47 and the oblique downward nozzle 48. Connected by a cross pipe 49, the middle of which is connected together, the two pipes connected by the oblique upward nozzle 45 and the oblique upward nozzle 47, and one pipe and one pipe are divided into oblique downward nozzles. 46. The two pipes connected to the inclined downward nozzle 48 are provided with pipes 4! 1 and 43 respectively in the middle of the cross pipe 49! The middle of the cross duct 49 is a pipe that avoids the vertical pipe 41! And the pitch of the pitch dimension c between the two oblique T-ports 46 and 48 on the cross duct 49 is 43-37 mm, and the pitch between the corresponding oblique upward nozzles 45 and 47. The size is also between 35~37 m. Also, the connection structure of the multi-pass casting forgings for the boiler pipe connection of the twelve-way is symmetrical. The other nozzles in the BB view are also set according to the rule to the above description. Various modifications and substitutions of the present invention will become apparent to those skilled in the <RTIgt; limited.

Claims

Rights request

L. A multi-pass casting forging connection structure for boiler pipe connection, characterized in that the connection structure comprises:

The vertical pipe group for connecting the vertical pipe system of the boiler, wherein the vertical pipe group includes all the vertical pipes of the thousand vertical pipes in the same plane, and the two ends of each vertical pipe are respectively vertical Up pipe P and vertical down pipe;

• An inclined pipe group for connecting the inclined pipe system of the boiler, the inclined pipe group includes a plurality of inclined pipes, and the inclined pipes of the r are located in the same plane, and the two ends of each inclined pipe are respectively For oblique upward and oblique downward nozzles;

The thousands of vertical pipes and the thousands of diagonal pipes are spaced apart.

2. The multi-pass casting forging connection structure for boiler pipe system connection according to claim 1, wherein the vertical pipe is arranged as a straight pipe or a bent pipe, and the inclined pipe is arranged For the cross pipe.

3. The multi-pass casting forging connection structure for boiler pipe connection according to claim 1, wherein the oblique pipe is arranged as a straight pipe or a bent pipe, and the vertical pipe is arranged For the cross pipe.

4. The multi-pass casting forging connection structure for boiler pipe connection according to claim 2 or 3, wherein the vertical pipe group and the oblique pipe group are fixedly connected by a casting forging.

5. The multi-pass casting forging connection structure for boiler pipe connection according to claim 4, wherein an angle between a plane where the oblique pipe group is located and a plane where the S-direction pipe group is located β is 45. Between 65 °.

6. The multi-pass casting forging connection knot for boiler piping connection according to claim 5, wherein the pitch b between the nozzles of the vertical duct is between 30 and 70 mm.

7. The multi-pass casting forging connection knot for boiler pipe connection according to claim 5, wherein a pitch c between the nozzles of the oblique pipe is between 30 and 70 mm.