A method for manufacturing a large arc-shaped water chamber of a condenser

Abstract

The present invention relates to the technical field of condensers, and in particular to a method for manufacturing a large arc-shaped water chamber of a condenser, comprising a connecting pipe and connecting flanges arranged at both ends of the connecting pipe. The connecting flange comprises a flange ring and a connecting ring. The flange ring is protrudingly arranged on the side of the flange ring away from the flange surface. One end of the connecting ring away from the flange ring is connected to the connecting pipe. When manufacturing the water chamber, the two connecting flanges and the connecting pipe are first processed completely, and then assembled and welded. During assembly welding, the two ends of the connecting pipe are respectively welded to the connecting rings of the two connecting flanges. Since the connecting ring has a certain length, there is a certain distance between its end and the flange ring. During welding, this distance can well prevent the high temperature of welding from causing thermal deformation of the flange ring. Thereby ensuring the accuracy of the connecting flanges at both ends.

Description

Technical Field

[0001] The invention relates to the technical field of condensers, and in particular to a method for manufacturing a large arc-shaped water chamber of a condenser. Background Art

[0002] A condenser is a heat exchanger that condenses steam from a steam turbine into water, also known as a rehydrator. The water chamber is an important part of the condenser. It is tubular in shape and has a connecting flange at each end. In order to ensure the quality of the water chamber, the processing requirements for the connecting flanges at both ends are relatively high. In the prior art, the water chamber is first assembled and welded as a whole, and then the connecting flanges at both ends are processed. Since the water chamber itself is relatively large, large processing equipment is required during the processing of the connecting flanges at both ends, which is costly. At the same time, the cost of rotating large objects back and forth is high, and the safety risk is high.

[0003] Application Contents

[0004] The object of the present invention is to provide a method for manufacturing a large arc-shaped water chamber of a condenser, wherein a connecting flange is provided with a connecting ring, and the connecting flange will not be deformed when the connecting ring is welded to a connecting pipe.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A large arc-shaped water chamber of a condenser comprises a connecting pipe and connecting flanges arranged at both ends of the connecting pipe; the connecting flange comprises a flange ring and a connecting ring; the flange ring is protrudingly arranged on a side of the flange ring away from the flange surface; an end of the connecting ring away from the flange ring is connected to the connecting pipe.

[0007] Furthermore, the connecting flange comprises a rectangular flange; the rectangular flange comprises four corner pieces and two pairs of side pieces; the four corner pieces and the two pairs of side pieces enclose a rectangular flange ring.

[0008] Furthermore, the connecting ring includes two pairs of connecting plates; the two pairs of connecting plates are enclosed in a rectangular tube shape.

[0009] Furthermore, the connecting flange also includes a circular flange; the circular flange includes a plurality of arc-shaped arc plates; and a plurality of the arc plates are spliced ​​into a circle.

[0010] Furthermore, the connecting pipe includes a transition section and a connecting section connected to each other; the transition section is connected to the rectangular flange; the connecting section is connected to the circular flange; the inner diameter of the transition section gradually decreases from one end of the rectangular flange to one end of the connecting section.

[0011] A method for manufacturing a large arc-shaped water chamber of a condenser comprises the following steps:

[0012] S1: Splice and weld two sets of flange rings; weld the connecting ring on the side of the two flange rings away from the flange surface; process the two sets of connecting flanges until the shape and size meet the design requirements; weld and process the connecting pipe;

[0013] S2: Weld two connecting rings to both ends of the connecting pipe.

[0014] Furthermore, the manufacturing method of the rectangular flange is:

[0015] A1: Cut the material to form four corner pieces and two pairs of side pieces; process the dimensions of the four corner pieces and two pairs of side pieces according to the drawings and reserve processing allowance for their thickness;

[0016] A2: Combine four corner pieces and two pairs of side pieces into a rectangle and spot weld them into one to form a flange ring;

[0017] A3: Fit the flange surfaces of the two flange rings and spot weld the connecting ribs between the two flange rings to connect the two flange rings together;

[0018] A4: Cut materials corresponding to each flange ring to form two pairs of connecting plates; weld the two pairs of connecting plates corresponding to each flange ring to the flange ring and fully weld each connection of each rectangular flange;

[0019] A5: Heat treatment of the components welded in step A4;

[0020] A6: Cut off the connecting ribs and separate the two rectangular flanges; process the thickness of the flange rings of the two rectangular flanges and drill holes in the flange rings.

[0021] Furthermore, the manufacturing method of the circular flange is:

[0022] B1: Cutting to form a number of arc plates; splicing the arc plates into a circular ring and spot welding them into a whole to form a flange ring;

[0023] B2: The outer dimensions of the flange ring shall be processed according to the drawing and a reserved processing allowance shall be made for its thickness;

[0024] B3: Weld the two circular flange rings formed in step B2 to the two ends of the pipe respectively;

[0025] B4: heat treating the assembly formed in step B3; machining the thickness of the two flange rings and drilling holes in the flange rings;

[0026] B5: Cut the pipe intermittently at an angle to the center line of the pipe so that the two cut sections have the same shape and size.

[0027] Furthermore, the connecting pipe includes a connecting section and a transition section; the manufacturing method of the connecting pipe is:

[0028] C1: Bend several steel plates into four arc-shaped plates and a round tube; weld the round tube to make it a closed round tube; splice the four arc-shaped plates into a transition section and fully weld them into a whole;

[0029] C2: Weld the round tube to the small diameter end of the transition section to form a connecting tube;

[0030] C3: Heat treatment of connecting pipes.

[0031] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0032] When manufacturing the large arc-shaped water chamber of the condenser of the present invention, the two connecting flanges and the connecting pipe are first completely processed, and then assembled and welded. During assembly and welding, the two ends of the connecting pipe are respectively welded to the connecting rings of the two connecting flanges. Since the connecting ring has a certain length, there is a certain distance between its end and the flange ring. During welding, this distance can well prevent the high temperature of welding from causing thermal deformation of the flange ring. Thus, the accuracy of the connecting flanges at both ends is guaranteed. At the same time, this structure allows the various components of the water chamber to be combined into assemblies and processed first, and finally the multiple components are assembled and welded. This avoids the need to perform fine processing after the various components of the water chamber are completely assembled and welded, thereby reducing the cost and safety risks of rotating large objects back and forth. Thus, production efficiency is improved, which is beneficial to the organization of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the structure of a large arc-shaped water chamber of a condenser provided by the present invention;

[0035] Figure 2 It is a schematic diagram of two circular flanges being cut apart;

[0036] Figure 3 is a schematic diagram of a rectangular flange;

[0037] Figure 4 It is a schematic diagram of two rectangular flanges connected by connecting ribs;

[0038] Figure 5 Schematic diagram of a circular flange.

[0039] Icons: 1-connecting pipe, 11-transition section, 12-connecting section, 2-rectangular flange, 21-corner piece, 22-side piece, 23-connecting plate, 3-circular flange, 31-arc plate, 32-connecting ring, 4-connecting rib. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Example:

[0046] As 1- Figure 5As shown in the figure, the present invention provides a large arc-shaped water chamber of a condenser, comprising a connecting pipe 1 and connecting flanges arranged at both ends of the connecting pipe 1. The connecting pipe 1 is used for circulating water. The two connecting flanges at both ends of the connecting pipe 1 are respectively connected to the condenser and the pipeline. So that the circulating water flows between the condenser and the pipeline through the connecting pipe 1. The connecting flange comprises a flange ring and a connecting ring 32. The flange ring is protrudingly arranged on the side of the flange ring away from the flange surface. The end of the connecting ring 32 away from the flange ring is connected to the connecting pipe 1.

[0047] When manufacturing the large arc-shaped water chamber of the condenser of the present invention, the two connecting flanges and the connecting pipe 1 are first completely processed, and then assembled and welded. During assembly and welding, the two ends of the connecting pipe 1 are respectively welded to the connecting rings 32 of the two connecting flanges. Since the connecting ring 32 has a certain length, there is a certain distance between its end and the flange ring. During welding, this distance can well prevent the high temperature of welding from causing thermal deformation of the flange ring. Then the accuracy of the connecting flanges at both ends is guaranteed. At the same time, this structure allows the various components of the water chamber to be combined into assemblies and processed first, and finally the multiple components are assembled and welded. This avoids the need to perform fine processing after the various components of the water chamber are completely assembled and welded, thereby reducing the cost and safety risks of rotating large objects back and forth. This improves production efficiency and is conducive to the organization of production.

[0048] In this embodiment, the connecting flange includes a rectangular flange 2. The rectangular flange 2 is connected to one end of the condenser, and its shape is the same as the shape of the side of the condenser, so that the rectangular flange 2 can be well fitted and connected to the side of the condenser. The rectangular flange 2 includes four corner pieces 21 and two pairs of side pieces 22. The corner piece 21 is "L" shaped. Four corner pieces 21 are arranged at four corners. Each end of the corner piece 21 is connected to a side piece 22, and the two pairs of side pieces 22 are arranged opposite to each other, so that the four corner pieces 21 and the two pairs of side pieces 22 enclose a rectangular flange ring. After the four corner pieces 21 and the two pairs of side pieces 22 enclose a rectangular flange ring, the various components can be welded together. The lengths of the two side pieces 22 of each pair are the same, and the lengths of the side pieces 22 of different pairs are set to be the same or different as needed. If they are the same, the flange ring is square; if they are different, the flange ring is rectangular.

[0049] The flange ring is made by splicing multiple parts. When cutting, these parts can be cut from the same steel plate to complete the flange ring cutting. It is not necessary to directly cut the annular flange ring from the same steel plate, which makes full use of the steel plate and avoids the inconvenience of using the remaining steel plate material caused by directly cutting the flange ring.

[0050] In this embodiment, the connecting ring 32 includes two pairs of connecting plates 23. The two pairs of connecting plates 23 are enclosed in a rectangular tube shape. Similarly, the connecting ring 32 uses the connecting plates 23 to splice and can maximize the use of steel plates to avoid waste of steel plates.

[0051] In this embodiment, the connecting flange further comprises a circular flange 3. The circular flange 3 is used to connect the pipe 1. The circular flange 3 comprises a plurality of circular arc plates 31. The plurality of circular arc plates 31 are spliced ​​into a circle.

[0052] In this embodiment, the connecting pipe 1 includes a transition section 11 and a connecting section 12 connected to each other. The transition section 11 is connected to the rectangular flange 2. The connecting section 12 is connected to the circular flange 3. The inner diameter of the transition section 11 gradually decreases from one end of the rectangular flange 2 to one end of the connecting section 12. The inner diameter of the transition section 11 gradually decreases, which is used to transition the inner diameter difference between the connecting section 12 and the rectangular flange 2 ring.

[0053] The present invention also provides a method for manufacturing a large arc-shaped water chamber of a condenser, comprising the following steps:

[0054] S1: Splice and weld two sets of flange rings. Weld the connecting ring 32 on the side of the two flange rings away from the flange surface, so that the connecting ring 32 and the flange ring are combined into a whole. Process the two sets of connecting flanges until the shape and size meet the design requirements, and complete the fine processing of the connecting flanges. Weld and process the connecting pipe 1.

[0055] S2: Weld the two connecting rings 32 to the two ends of the connecting pipe 1 to complete the assembly welding.

[0056] During the processing, the connecting ring 32 and the flange ring are first welded together, and then the connecting flange is finely processed as a whole until the processing is complete. During the assembly process, the processing can be completed by directly welding the fully processed connecting flange and the connecting pipe 1. Avoid the trouble caused by welding all the components of the water chamber together and then fine-processing them as a whole. No large-scale equipment processing equipment is required, reducing processing costs. There is no need to transport large equipment to various places for processing, which is safer. In addition, by welding the connecting ring 32 and the connecting pipe 1, thermal deformation of the flange ring caused by directly welding the connecting pipe 1 to the flange ring is avoided, which reduces costs and effectively ensures processing accuracy.

[0057] Furthermore, the manufacturing method of the rectangular flange 2 is:

[0058] A1: Cutting to form four corner pieces 21 and two pairs of side pieces 22. The dimensions of the four corner pieces 21 and two pairs of side pieces 22 are processed according to the drawings and a processing allowance is reserved for their thickness.

[0059] A2: Combine four corner pieces 21 and two pairs of side pieces 22 into a rectangle and spot weld them together to form a flange ring. Then pre-connect the components to facilitate later assembly and welding.

[0060] A3: If Figure 4As shown, the flange surfaces of the two flange rings are attached and the connecting ribs 4 are spot welded between the two flange rings to connect the two flange rings together. The connecting ribs 4 can be ordinary steel bar segments. Its two ends are respectively connected to a flange ring, so that the two flange rings are connected to each other. Several connecting ribs 4 are distributed along the circumference of the flange ring, so that the two flange rings are tightly connected to each other at all places.

[0061] A4: Cut materials corresponding to each flange ring to form two pairs of connecting plates 23. Weld the two pairs of connecting plates 23 corresponding to each flange ring to the flange ring and fully weld each connection of each rectangular flange 2. Then, the assembly and welding of the rectangular flange 2 are completed.

[0062] A5: Heat treat the components after welding in step A4.

[0063] A6: Cut off the connecting rib 4 and separate the two rectangular flanges 2. Process the thickness of the flange rings of the two rectangular flanges 2 and drill holes in the flange rings. Complete all processing of the rectangular flanges 2.

[0064] The two flange rings are connected by connecting ribs 4 and then welded. The flange ring that is not welded is restricted by several connecting ribs 4 to the welded flange ring, effectively avoiding large deformation during the welding process. The processing accuracy is guaranteed. At the same time, the dimensions of the four corner pieces 21 and the two pairs of side pieces 22 are processed before being welded into a whole, avoiding the large volume and inconvenience of processing after being welded into a whole.

[0065] In this embodiment, the manufacturing method of the circular flange 3 is:

[0066] B1: Cutting materials to form a plurality of arc plates 31; splicing the plurality of arc plates 31 into a circular ring and spot welding them into a whole to form a flange ring.

[0067] B2: The outer dimensions of the flange ring shall be processed according to the drawing and a reserve processing allowance shall be reserved for its thickness.

[0068] B3: Weld the two circular flange rings formed in step B2 to the two ends of the connecting pipe respectively.

[0069] B4: Heat treat the assembly formed in step B3; process the thickness of the two flange rings and drill holes in the flange rings to make the shape and size meet the design requirements.

[0070] B5: Cut the pipe intermittently at an angle to the pipe centerline, so that the two cut pipe sections have the same shape and size. Figure 2 As shown by the dotted line in .

[0071] During the processing of the circular flange 3, after the circular flange ring is spliced ​​and welded to the pipe, the outer shape is first turned into place. The two flange rings and the pipe are combined together for easy turning and drilling. After the processing is completed, the pipe is cut into two sections to form two circular flanges 3, which not only reduces the processing cost, but also realizes mass production and improves production efficiency. At the same time, this production method also improves the utilization rate of materials.

[0072] In this embodiment, the connecting pipe 1 includes a connecting section 12 and a transition section 11. The manufacturing method of the connecting pipe 1 is:

[0073] C1: Bend several steel plates into four arc-shaped plates and a round tube. Weld the round tube to make it a closed round tube. Splice the four arc-shaped plates into a transition section 11 and fully weld them into a whole.

[0074] C2: Weld a round tube to the small diameter end of the transition section 11 to form a connecting tube 1.

[0075] C3: Heat treatment is performed on the connecting pipe 1.

[0076] The transition section 11 is manufactured by splicing, which maximizes the utilization rate of materials.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a large arc-shaped water chamber of a condenser, characterized in that: Used for processing a large arc-shaped water chamber of a condenser; the large arc-shaped water chamber of the condenser comprises a connecting pipe (1) and connecting flanges arranged at both ends of the connecting pipe (1); the connecting flange comprises a flange ring and a connecting ring (32); the flange ring is protrudingly arranged on a side of the flange ring away from the flange surface; the end of the connecting ring (32) away from the flange ring is connected to the connecting pipe (1); The connecting flange comprises a rectangular flange (2); the rectangular flange (2) comprises four corner pieces (21) and two pairs of side pieces (22); the four corner pieces (21) and the two pairs of side pieces (22) enclose a rectangular flange ring; The manufacturing method comprises the following steps: S1: splicing and welding two sets of flange rings; welding a connecting ring (32) on the side of the two flange rings away from the flange surface; processing the two sets of connecting flanges until the shape and size meet the design requirements; welding and processing the connecting pipe (1); S2: welding two connecting rings (32) to the two ends of the connecting pipe (1); The manufacturing method of the rectangular flange (2) is as follows: A1: Cutting to form four corner pieces (21) and two pairs of side pieces (22); processing the dimensions of the four corner pieces (21) and the two pairs of side pieces (22) according to the drawings and reserving a processing allowance for their thickness; A2: four corner pieces (21) and two pairs of side pieces (22) are combined into a rectangle and spot welded into one piece to form a flange ring; A3: Fit the flange surfaces of the two flange rings together and spot weld the connecting rib (4) between the two flange rings to connect the two flange rings together; A4: Cutting materials corresponding to each flange ring to form two pairs of connecting plates (23); welding the two pairs of connecting plates (23) corresponding to each flange ring to the flange ring and fully welding each connection of each rectangular flange (2); A5: Heat treatment of the components welded in step A4; A6: Cut off the connecting rib (4) and separate the two rectangular flanges (2); process the thickness of the flange rings of the two rectangular flanges (2) and drill holes in the flange rings.

2. The method for manufacturing a large arc-shaped water chamber of a condenser according to claim 1, characterized in that: The connecting ring (32) comprises two pairs of connecting plates (23); the two pairs of connecting plates (23) are enclosed in a rectangular tube shape.

3. The method for manufacturing a large arc-shaped water chamber of a condenser according to claim 1, characterized in that: The connecting flange also includes a circular flange (3); the circular flange (3) includes a plurality of circular arc plates (31); and a plurality of the circular arc plates (31) are spliced ​​into a circle.

4. The method for manufacturing a large arc-shaped water chamber of a condenser according to claim 3, characterized in that: The connecting pipe (1) comprises a transition section (11) and a connecting section (12) which are connected to each other; the transition section (11) is connected to the rectangular flange (2); the connecting section (12) is connected to the circular flange (3); the inner diameter of the transition section (11) gradually decreases from one end of the rectangular flange (2) to one end of the connecting section (12).

5. The method for manufacturing a large arc-shaped water chamber of a condenser according to claim 1, characterized in that: The manufacturing method of the circular flange (3) is as follows: B1: Cutting materials to form a plurality of arc plates (31); splicing the plurality of arc plates (31) into a circular ring and spot welding them into a whole to form a flange ring; B2: The outer dimensions of the flange ring shall be processed according to the drawing and a reserved processing allowance shall be made for its thickness; B3: Weld the two circular flange rings formed in step B2 to the two ends of the pipe respectively; B4: heat treating the assembly formed in step B3; machining the thickness of the two flange rings and drilling holes in the flange rings; B5: Cut the pipe intermittently at an angle to the center line of the pipe so that the two cut sections have the same shape and size.

6. The method for manufacturing a large arc-shaped water chamber of a condenser according to claim 1, characterized in that: The connecting pipe (1) comprises a connecting section (12) and a transition section (11); the manufacturing method of the connecting pipe (1) is as follows: C1: bending a plurality of steel plates into four arc-shaped plates and a circular tube; welding the circular tube to form a closed circular tube; splicing the four arc-shaped plates into a transition section (11) and fully welding the transition section into a whole; C2: welding a round tube to the small diameter end of the transition section (11) to form a connecting tube (1); C3: Heat treatment is performed on the connecting pipe (1).

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