Steam circulation mechanism of steam turbine

By installing insulation and clamping structures on the outside of the steam circulation pipe of the steam turbine, the problems of heat loss and deformation of the circulation pipe are solved, and the stability and efficiency of steam circulation are improved.

CN223689784UActive Publication Date: 2025-12-19INNER MONGOLIA SHANGDU POWER GENERATION CO LTD
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Patent Information

Application Number
CN202520493788.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-19
Publication Date
2025-12-19
Estimated Expiration
2035-03-19

AI Technical Summary

Technical Problem

In existing steam turbine steam circulation mechanisms, the circulation pipes suffer from severe heat loss and are prone to deformation, leading to steam leakage and affecting circulation efficiency.

Method used

An insulation structure consisting of upper and lower arc-shaped insulation bases and insulation layers is installed on the outside of the circulating pipe, and it is fixed to the installation foundation by clamping and fixed support structures to prevent heat loss and deformation.

Benefits of technology

It effectively reduces steam heat loss, prevents pipe deformation, and improves the stability and efficiency of steam circulation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223689784U_ABST
Patent Text Reader

Abstract

The utility model provides a steam circulation mechanism of a steam turbine, which relates to the technical field of steam circulation of steam turbines and comprises a circulation pipe body used for circulating steam of a high-pressure section of the steam turbine to a reheater, a heat preservation structure is arranged on the outer side of the circulation pipe body, and a clamping structure is arranged on the outer side of the heat preservation structure. The heat preservation structure comprises an upper arc-shaped heat preservation seat and a lower arc-shaped heat preservation seat, heat preservation layers are arranged on the inner walls of the upper arc-shaped heat preservation seat and the lower arc-shaped heat preservation seat, the clamping structure comprises an upper arc-shaped clamping seat and a lower arc-shaped clamping seat, and a fixed supporting structure is arranged at the bottom of the lower arc-shaped clamping seat; the heat preservation structure composed of the upper arc-shaped heat preservation base, the lower arc-shaped heat preservation base and the heat preservation layer is arranged on the outer side of the circulating pipe body, so that the problem that steam heat in the circulating pipe body is lost too fast can be effectively solved; and the problem of connection leakage caused by deformation of the circulating pipe body during long-time conveying of high-temperature steam is avoided.
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Description

TECHNICAL FIELD

[0001] The utility model relates to steam circulating mechanism of steam turbine technical field, especially steam circulating mechanism of steam turbine. BACKGROUND

[0002] Steam turbine steam cycle is to use steam as working medium, absorbs heat in the boiler, expands and does work in the steam turbine, releases heat and condenses in the condenser, and is sent back to the boiler by the feed water pump. The simplest steam power cycle device ideal cycle is Rankine cycle, which includes the basic process of the above four main devices. However, the thermal efficiency of Rankine cycle is not high, because only a small part of the heat absorbed by the steam in the boiler is converted into the work of the steam turbine, and most of the heat (latent heat) is lost in the condenser as a cold source by the circulating cooling water.

[0003] In order to improve the thermal efficiency of steam power cycle, people have taken various measures, the most important of which are regenerative cycle and intermediate reheating cycle. Among them, the intermediate reheating cycle is to let the new steam enter the high pressure part of the steam turbine to expand and do work, then the steam after work is introduced into the reheater of the boiler to be heated again (usually the steam temperature is increased to the temperature equivalent to the new steam), and then sent to the middle and low pressure parts of the steam turbine to continue to expand and do work. In this process, the circulating mechanism is needed to circulate the steam after the expansion and work of the high pressure part of the steam turbine to the reheater of the boiler. The main part of the circulating mechanism is the circulating pipe. The circulating pipe in the prior art is an ordinary pipe. In a long distance circulating line, the steam circulating in the circulating pipe loses a lot of heat, and the circulating pipe in the prior art is a hard pipe, which is directly connected to the high pressure part of the steam turbine and the reheater of the boiler without any supporting structure. The circulating pipe is easy to deform during long-term transportation of hot steam, which affects the sealing of the connection and causes steam leakage, affecting the steam circulation efficiency. Therefore, the utility model provides a steam circulating mechanism of steam turbine to solve the problems in the prior art. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a steam circulating mechanism of steam turbine, which comprises an arc-shaped heat preservation seat, a lower arc-shaped heat preservation seat and a heat preservation layer arranged outside the circulating pipe body. The heat loss of the steam in the circulating pipe body can be effectively avoided, and the circulating pipe body can be fixed on the installation base by the fixed supporting structure to avoid the deformation of the circulating pipe body caused by long-term transportation of high temperature steam, thereby avoiding the leakage of the connection.

[0005] To achieve the purpose of the utility model, the utility model realizes the following technical scheme:

[0006] A steam circulating mechanism of a steam turbine, comprising a circulating pipe body for circulating steam of a high-pressure section of a steam turbine to a reheater, an insulation structure is arranged outside the circulating pipe body, a clamping structure is arranged outside the insulation structure, the insulation structure comprises an upper arc-shaped insulation seat and a lower arc-shaped insulation seat, the upper arc-shaped insulation seat and the lower arc-shaped insulation seat are symmetrically arranged above and below the circulating pipe body, an insulation layer is arranged on the inner walls of the upper arc-shaped insulation seat and the lower arc-shaped insulation seat, the clamping structure comprises an upper arc-shaped clamping seat and a lower arc-shaped clamping seat, the upper arc-shaped clamping seat is arranged outside the upper arc-shaped insulation seat, the lower arc-shaped clamping seat is arranged outside the lower arc-shaped insulation seat, connecting plates are arranged on both sides of the upper arc-shaped clamping seat and the lower arc-shaped clamping seat, and the two connecting plates on the same side are connected by a fastening bolt and a nut.

[0007] The lower arc-shaped clamping seat is fixed with the mounting base through the fixing support structure.

[0008] Further improvement lies in that the upper arc-shaped insulation seat and the lower arc-shaped insulation seat are both provided with positioning strips, and the inner walls of the upper arc-shaped clamping seat and the lower arc-shaped clamping seat are both provided with positioning grooves matched with the positioning strips.

[0009] Further improvement lies in that the upper arc-shaped clamping seat and the lower arc-shaped clamping seat are both provided with positioning bolts, the positioning strips are provided with positioning holes, the positioning holes are provided with a plurality of positioning holes, and the positioning bolts are connected with the positioning holes.

[0010] Further improvement lies in that the fixing support structure comprises a base, a first fixing plate, an L-shaped fixing plate and a second fixing plate, the lower arc-shaped clamping seat is provided with the base, the left and right sides of the base are provided with the L-shaped fixing plates, the front and rear sides of the base are provided with the first fixing plates, and the L-shaped fixing plates are provided with the second fixing plates.

[0011] Further improvement lies in that the first fixing plates, the L-shaped fixing plates and the second fixing plates are all provided with fixing screw holes.

[0012] Further improvement lies in that the two sides of the two ends of the upper arc-shaped insulation seat are both provided with first locking blocks, the two sides of the two ends of the lower arc-shaped insulation seat are both provided with second locking blocks, and the first locking blocks and the second locking blocks on the same side are fixed by locking bolts.

[0013] The utility model discloses a beneficial effect is: the utility model discloses a heat preservation structure that sets up by the upper arc heat preservation seat, lower arc heat preservation seat and heat preservation layer is set up to the outside of circulating pipe body, can effectively avoid circulating pipe body in the steam heat loss too fast problem, through setting up the clamping structure outside heat preservation structure can realize stable heat preservation structure fixed on the outer wall of circulating pipe body, through setting up the fixed support structure in the lower arc clamping seat bottom of clamping structure, can through fixed support structure and fix circulating pipe body on the installation foundation, avoid circulating pipe body long -time delivery high temperature steam and be deformed and cause the connection leakage problem, improved steam turbine steam circulation mechanism's operation stability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the utility model structure perspective view for this utility model;

[0015] Figure 2 It is the utility model clamping structure and fixed support structure assembly schematic drawing for this utility model;

[0016] Figure 3 It is the utility model Figure 1 The structure amplification schematic drawing of A place in the middle.

[0017] Wherein: 1, circulating pipe body;2, upper arc heat preservation seat;3, lower arc heat preservation seat;4, heat preservation layer;5, upper arc clamping seat;6, lower arc clamping seat;7, connecting plate;8, fastening bolt;9, nut;10, fixed support structure;1001, base;1002, first fixed plate;1003, L shape fixed plate;1004, second fixed plate;1005, fixed screw hole;11, positioning strip;12, positioning groove;13, positioning bolt;14, positioning hole;15, first locking block;16, second locking block;17, locking bolt. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the utility model, the utility model will be further detailed below in conjunction with examples, and this embodiment is only used to explain the utility model, and does not constitute the limitation to the protection scope of the utility model.

[0019] Example one

[0020] According to Figures 1-3As shown, the steam turbine steam circulation mechanism of the embodiment comprises a circulation pipe body 1 for circulating steam turbine high-pressure section steam to a reheater, an insulation structure is arranged outside the circulation pipe body 1, a clamping structure is arranged outside the insulation structure, the insulation structure comprises an upper arc-shaped insulation seat 2 and a lower arc-shaped insulation seat 3, the upper arc-shaped insulation seat 2 and the lower arc-shaped insulation seat 3 are symmetrically arranged above and below the circulation pipe body 1, insulation layers 4 are arranged on inner walls of the upper arc-shaped insulation seat 2 and the lower arc-shaped insulation seat 3, the clamping structure comprises an upper arc-shaped clamping seat 5 and a lower arc-shaped clamping seat 6, the upper arc-shaped clamping seat 5 is arranged outside the upper arc-shaped insulation seat 2, the lower arc-shaped clamping seat 6 is arranged outside the lower arc-shaped insulation seat 3, connecting plates 7 are arranged on both sides of the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6, and the two connecting plates 7 on the same side are connected through a fastening bolt 8 and a nut 9.

[0021] When the steam turbine steam circulation mechanism is assembled and used, first, the lower arc-shaped clamping seat 6 is fixed to the installation base through the fixed support structure 10, then the upper arc-shaped insulation seat 2 and the lower arc-shaped insulation seat 3 are symmetrically arranged above and below the circulation pipe body 1, so that the upper arc-shaped insulation seat 2 and the lower arc-shaped insulation seat 3 form an integral structure with the circulation pipe body 1, then the integral structure is assembled into the lower arc-shaped clamping seat 6, the upper arc-shaped clamping seat 5 is used to press and fix the integral structure into the lower arc-shaped clamping seat 6, and finally the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 are fixed through the fastening bolt 8 and the nut 9.

[0022] The fixed support structure 10 comprises a base 1001, a first fixed plate 1002, an L-shaped fixed plate 1003 and a second fixed plate 1004, the bottom of the lower arc-shaped clamping seat 6 is provided with the base 1001, the left and right sides of the base 1001 are provided with the L-shaped fixed plate 1003, the front and rear sides of the base 1001 are provided with the first fixed plate 1002, and the L-shaped fixed plate 1003 is provided with the second fixed plate 1004. Fixed screw holes 1005 are arranged on the first fixed plate 1002, the L-shaped fixed plate 1003 and the second fixed plate 1004. The first fixed plate 1002, the L-shaped fixed plate 1003 and the second fixed plate 1004 of the fixed support structure 10 can be fixed to the installation base in three states, for example, the first fixed plate 1002 can be fixed to the horizontally transverse installation base, the L-shaped fixed plate 1003 and the second fixed plate 1004 can be fixed to two groups of longitudinally different installation bases, and multiple installation forms can meet the fixing requirements of complex environments.

[0023] The upper arc-shaped heat preservation seat 2 is provided with first locking blocks 15 at both sides of both ends, the lower arc-shaped heat preservation seat 3 is provided with second locking blocks 16 at both sides of both ends, and the first locking blocks 15 and the second locking blocks 16 on the same side are fixed through locking bolts 17. By arranging the first locking blocks 15, the second locking blocks 16 and the locking bolts 17, the upper arc-shaped heat preservation seat 2 and the lower arc-shaped heat preservation seat 3 can be integrated with the circulating pipe body 1.

[0024] Embodiment two

[0025] According to Figures 1-3 As shown in the figure, the embodiment provides a steam circulating mechanism of a steam turbine, which comprises a circulating pipe body 1 for circulating steam of a high-pressure section of a steam turbine to a reheater, an outer side of the circulating pipe body 1 is provided with a heat preservation structure, an outer side of the heat preservation structure is provided with a clamping structure, the heat preservation structure comprises an upper arc-shaped heat preservation seat 2 and a lower arc-shaped heat preservation seat 3, the upper arc-shaped heat preservation seat 2 and the lower arc-shaped heat preservation seat 3 are symmetrically arranged above and below the circulating pipe body 1, inner walls of the upper arc-shaped heat preservation seat 2 and the lower arc-shaped heat preservation seat 3 are both provided with heat preservation layers 4, the clamping structure comprises an upper arc-shaped clamping seat 5 and a lower arc-shaped clamping seat 6, the upper arc-shaped clamping seat 5 is arranged at an outer side of the upper arc-shaped heat preservation seat 2, the lower arc-shaped clamping seat 6 is arranged at an outer side of the lower arc-shaped heat preservation seat 3, both sides of the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 are provided with connecting plates 7, the two connecting plates 7 on the same side are connected through fastening bolts 8 and nuts 9, the lower arc-shaped clamping seat 6 is provided with a fixed support structure 10 at the bottom, and the lower arc-shaped clamping seat 6 is fixed with a mounting base through the fixed support structure 10.

[0026] The upper arc-shaped heat preservation seat 2 is provided with a positioning strip 11 at the top, and the lower arc-shaped heat preservation seat 3 is provided with a positioning strip 11 at the bottom, inner walls of the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 are both provided with positioning grooves 12 matched with the positioning strips 11. The upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 are both provided with positioning bolts 13, the positioning strips 11 are provided with positioning holes 14, the positioning holes 14 are provided with a plurality of positioning holes, and the positioning bolts 13 are connected with the positioning holes 14. By arranging the positioning strips 11 and the positioning grooves 12, the positioning installation between the upper arc-shaped heat preservation seat 2 and the lower arc-shaped heat preservation seat 3 and the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 can be ensured, and the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 can also move on the positioning strips 11 through the positioning grooves 12, so that the upper arc-shaped clamping seat 5 and the lower arc-shaped clamping seat 6 can clamp the upper arc-shaped heat preservation seat 2 and the lower arc-shaped heat preservation seat 3 at different positions, and the use flexibility is improved.

[0027] The utility model discloses a heat preservation structure that is composed of upper arc heat preservation seat 2, lower arc heat preservation seat 3 and heat preservation layer 4 is set up outside circulating pipe body 1, can effectively avoid the problem that steam heat loss is too fast in circulating pipe body 1, through setting up the clamping structure outside heat preservation structure can realize stably and fix heat preservation structure on the outer wall of circulating pipe body 1, through setting up fixed support structure 10 in the bottom of lower arc clamp holder 6 of clamping structure, can fix circulating pipe body 1 on the installation foundation through fixed support structure 10, avoid the problem that circulating pipe body 1 long -time delivery high -temperature steam and occur deformation and cause the connection leakage, improved the operation stability of steam turbine steam circulation mechanism.

[0028] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A steam circulating mechanism of a steam turbine, comprising a circulating pipe body (1) for circulating steam of a high pressure stage of a steam turbine to a reheater, characterized by: The circulating pipe body (1) is provided with a heat preservation structure outside, the heat preservation structure is provided with a clamping structure outside, the heat preservation structure comprises an upper arc-shaped heat preservation seat (2) and a lower arc-shaped heat preservation seat (3), the upper arc-shaped heat preservation seat (2) and the lower arc-shaped heat preservation seat (3) are symmetrically arranged above and below the circulating pipe body (1), the inner walls of the upper arc-shaped heat preservation seat (2) and the lower arc-shaped heat preservation seat (3) are provided with heat preservation layers (4), the clamping structure comprises an upper arc-shaped clamping seat (5) and a lower arc-shaped clamping seat (6), the upper arc-shaped clamping seat (5) is arranged outside the upper arc-shaped heat preservation seat (2), the lower arc-shaped clamping seat (6) is arranged outside the lower arc-shaped heat preservation seat (3), and the upper arc-shaped clamping seat (5) and the lower arc-shaped clamping seat (6) are provided with connecting plates (7) on the two sides; the two connecting plates (7) on the same side are connected through a fastening bolt (8) and a nut (9). The lower arc-shaped clamping seat (6) is provided with a fixed support structure (10) at the bottom, and the lower arc-shaped clamping seat (6) is fixed with the installation base through the fixed support structure (10).

2. A steam cycle mechanism for a steam turbine according to claim 1, characterized by: The upper arc-shaped heat preservation seat (2) and the lower arc-shaped heat preservation seat (3) are provided with positioning strips (11) at the top and the bottom respectively, and the inner walls of the upper arc-shaped clamping seat (5) and the lower arc-shaped clamping seat (6) are provided with positioning grooves (12) matched with the positioning strips (11).

3. A steam cycle mechanism for a steam turbine as defined in claim 2, wherein: The upper arc-shaped clamping seat (5) and the lower arc-shaped clamping seat (6) are provided with positioning bolts (13), the positioning strips (11) are provided with positioning holes (14), the positioning holes (14) are provided with a plurality of positioning holes (14), and the positioning bolts (13) are connected with the positioning holes (14).

4. A steam cycle mechanism for a steam turbine as defined in claim 1, wherein: The fixed support structure (10) comprises a base (1001), a first fixed plate (1002), an L-shaped fixed plate (1003) and a second fixed plate (1004), the lower arc-shaped clamping seat (6) is provided with the base (1001) at the bottom, the base (1001) is provided with the L-shaped fixed plate (1003) on the left and right sides, the base (1001) is provided with the first fixed plate (1002) on the front and back sides, and the L-shaped fixed plate (1003) is provided with the second fixed plate (1004).

5. A steam cycle mechanism for a steam turbine as defined in claim 4, wherein: The first fixed plate (1002), the L-shaped fixed plate (1003) and the second fixed plate (1004) are provided with fixed screw holes (1005).

6. A steam cycle mechanism for a steam turbine as defined in claim 1, wherein: The upper arc-shaped heat preservation seat (2) is provided with first locking blocks (15) on the two sides of the two ends, the lower arc-shaped heat preservation seat (3) is provided with second locking blocks (16) on the two sides of the two ends, and the first locking blocks (15) and the second locking blocks (16) on the same side are fixed through locking bolts (17).