Seamless stainless steel tube for steam generator

Abstract

The utility model relates to the field of steam pipelines, and discloses a stainless steel seamless steel pipe for a steam generator, which comprises a pipe body, a wide-diameter opening is arranged at the front end of the pipe body, threads are arranged on the inner wall of the wide-diameter opening, a narrow-diameter opening is arranged at the rear end of the pipe body, and threads are arranged on the outer side of the narrow-diameter opening. The inner wall of the pipe body is connected with a plurality of inner layer plates through a mounting assembly, the top ends of the outer sides of the plurality of inner layer plates are fixedly connected with grooves, the bottom ends of the outer sides of the plurality of inner layer plates are provided with convex blocks, and the left side and the right side of the rear end of the outer wall of the pipe body are fixedly connected with first fixing seats. According to the utility model, the inner layer plate which can be conveniently detached is arranged, so that incrustation can be cleaned, the problems of reduction of heat transfer efficiency and the like caused by the incrustation are reduced, the service life of equipment is prolonged, and funds are saved; the front end and the rear end of the pipe body are connected in a threaded mode to facilitate pipeline splitting, specific parts are convenient to inspect and maintain, shutdown maintenance time is remarkably shortened compared with an existing steel pipe, and production loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steam pipeline, especially to a stainless steel seamless steel pipe for steam generator. BACKGROUND

[0002] The stainless steel seamless steel pipe is a kind of steel pipe for conveying high-temperature and high-pressure steam, is often applied to the heat exchange pipe of large evaporator, because these materials can withstand higher pressure and temperature. Its pipe wall is thicker to ensure enough strength to resist the pressure generated by internal steam. It is widely used in power plant, petrochemical industry and many other industrial fields, such as in power plant, it transports high-temperature and high-pressure steam generated by boiler to steam turbine, drives generator to generate electricity. Its good sealing property can prevent steam leakage, and has higher corrosion resistance, can work stably for a long time in harsh working environment.

[0003] However, in actual use, it is found that the existing stainless steel seamless steel pipe for steam generator still has the following technical problems:

[0004] In the aspect of maintenance, its structure design often makes the disassembly process complex, needs to use professional tools, consumes a lot of manpower and time, and it is difficult to carry out efficient inspection and maintenance for specific parts such as elbow, easy wear or serious scaling, greatly prolongs the downtime maintenance time, and increases production loss. In the face of scale problem, ordinary steel pipe has no effective means to deal with it, and scale adhesion can easily cause the inner diameter of the pipeline to become smaller, and the water flow resistance to increase, which not only reduces the heat transfer efficiency, causes energy waste, but also accelerates the damage of the pipeline due to local overheating, shortens the overall service life of the equipment.

[0005] For this, in view of the technical problem, the present application provides a stainless steel seamless steel pipe for steam generator. CONTENT OF UTILITY MODEL

[0006] The utility model aims at solving the shortcomings of inconvenient maintenance and difficult to deal with scale in the prior art, and provides a stainless steel seamless steel pipe for steam generator. The inner layer plate of the steel pipe can be conveniently disassembled, which can clean scale, reduce the problem of reduced heat transfer efficiency caused by scale, prolong the service life of the equipment and save money. The pipe body is connected through threads at front and rear ends, which can conveniently disassemble the pipeline, check and maintain specific parts, significantly shorten the downtime maintenance time compared with the existing steel pipe, and reduce production loss.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of stainless steel seamless steel pipe for steam generator, including pipe body, the wide diameter mouth is set in the front end of the pipe body, the inner wall of the wide diameter mouth is provided with the thread, the narrow diameter mouth is set in the rear end of the pipe body, the narrow diameter mouth outside is provided with the tooth mouth, the inner wall of the pipe body is connected with multiple inner layer boards by mounting assembly, the outer side top end of multiple the inner layer boards is fixedly connected with recess, the outer side bottom end of multiple the inner layer boards is provided with protruding block, the left and right sides of the rear end of the outer wall of the pipe body are fixedly connected with fixed seat one, the outer side of the fixed seat one is provided with reserved slot, the inner wall rear end of the reserved slot is rotatably connected with connecting block, the left and right sides of the front end of the outer wall of the pipe body are fixedly connected with fixed seat two, the outer side of the fixed seat two is provided with clamping groove.

[0009] Further, the top side of the connecting block is provided with a threaded hole, and the fixed seat one and the fixed seat two are connected with the threaded hole by a fixing assembly.

[0010] Further, the fixing assembly includes a through hole, which is provided on the outer wall of the fixed seat one and the fixed seat two at a distance from each other on the top side, and a fixing bolt is threadedly connected to the inner wall of the through hole.

[0011] Further, the inner wall of the clamping groove is detachably connected with the connecting block.

[0012] Further, the mounting assembly includes multiple sliding grooves, which are provided on the inner wall of the pipe body at the front end, and the inner wall of the sliding groove is detachably connected with a sliding block, and the sliding block is fixedly connected to the outer side of the rear end of the multiple inner layer boards.

[0013] Further, the thread is threadedly connected with the tooth mouth.

[0014] Further, the inner wall of the inner layer board is fixedly connected with a spoiler strip, and the outer wall of the inner layer board is attached to the inner wall of the pipe body.

[0015] The utility model has the following beneficial effects:

[0016] 1、In the utility model, the inner layer board can be conveniently detached, which can be easily removed during maintenance, and the inner wall and the attached part of the inner wall of the pipe body can be thoroughly cleaned. This effectively reduces the problems of reduced heat transfer efficiency, energy waste and pipe damage caused by scale accumulation, prolongs the service life of the steam generator as a whole, and saves equipment procurement funds.

[0017] 2、In the utility model, the thread of the wide diameter mouth at the front end of the pipe body is threadedly connected with the tooth mouth of the narrow diameter mouth at the rear end, which can easily rotate and disassemble the entire pipe system, facilitating detailed inspection and maintenance of specific parts such as elbows, easily worn parts and heavily scaled parts. Compared with the existing steel pipe which may be difficult to disassemble or require professional tools and complex processes, the utility model significantly shortens the maintenance time and reduces production losses. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A perspective view of a stainless steel seamless steel pipe for a steam generator is provided in the utility model;

[0019] Figure 2 A narrow diameter port structure schematic view of a stainless steel seamless steel pipe for a steam generator is provided in the utility model;

[0020] Figure 3 An inner layer plate structure schematic view of a stainless steel seamless steel pipe for a steam generator is provided in the utility model;

[0021] Figure 4 A fixing assembly structure schematic view of a stainless steel seamless steel pipe for a steam generator is provided in the utility model.

[0022] Legend:

[0023] 1, pipe body; 2, wide diameter port; 3, narrow diameter port; 4, tooth pattern; 5, tooth port; 6, mounting assembly; 7, inner layer plate; 8, groove; 9, protruding block; 10, spoiler strip; 11, fixing seat one; 12, reserved groove; 13, connecting block; 14, fixing assembly; 15, fixing seat two; 16, clamping groove; 17, screw hole; 601, sliding groove; 602, sliding block; 1401, through hole; 1402, fixing bolt. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Reference Figures 1-3 An embodiment provided by the utility model: a stainless steel seamless steel pipe for a steam generator, comprising a pipe body 1, a wide diameter port 2 is formed at the front end of the pipe body 1, a tooth pattern 4 is arranged on the inner wall of the wide diameter port 2, a narrow diameter port 3 is formed at the rear end of the pipe body 1, a tooth port 5 is formed on the outer side of the narrow diameter port 3, a plurality of inner layer plates 7 are connected to the inner wall of the pipe body 1 through a mounting assembly 6, a groove 8 is fixedly connected to the outer side top end of the plurality of inner layer plates 7, a protruding block 9 is formed on the outer side bottom end of the plurality of inner layer plates 7, a fixing seat one 11 is fixedly connected to the left and right sides of the rear end of the outer wall of the pipe body 1, a reserved groove 12 is formed on the outer side of the fixing seat one 11, a connecting block 13 is rotatably connected to the inner wall rear end of the reserved groove 12, a fixing seat two 15 is fixedly connected to the left and right sides of the front end of the outer wall of the pipe body 1, and a clamping groove 16 is formed on the outer side of the fixing seat two 15.

[0026] Specifically, the wide-diameter port 2 at the front end of the pipe body 1 is provided with a tooth 4, and the narrow-diameter port 3 at the rear end is provided with a tooth 5, and the tooth 4 is threadedly connected with the tooth 5, so that a plurality of pipe bodies can be conveniently connected and detached. This design has obvious advantages in actual application. When the steam generator needs to be maintained, the staff can easily unscrew the pipe body from the connection, and the entire pipe system can be disassembled into individual pipe body units. This not only facilitates detailed inspection of different parts, such as elbow parts, easily worn parts, or suspected heavily scaled parts, but also enables quick replacement or repair of the problematic pipe body after the problem is found, greatly improving maintenance efficiency and convenience, effectively shortening the downtime of the steam generator for maintenance, and reducing the loss caused by equipment downtime to production.

[0027] The inner wall of the pipe body 1 is connected with a plurality of inner layer plates 7 through a mounting assembly 6. A plurality of sliding grooves 601 in the mounting assembly 6 are provided at the front end of the inner wall of the pipe body 1 and are detachably connected with sliding blocks 602 fixed at the rear end of the outer side of the plurality of inner layer plates 7. This not only facilitates the installation and disassembly of the inner layer plates 7, but also facilitates the cleaning of the inner layer plates 7. During the operation of the steam generator, water flows in the pipe, and scale is easily attached to the inner wall of the pipe. The inner layer plates 7 are easily disassembled and can be easily removed during maintenance to thoroughly clean the scale accumulated on the inner wall of the pipe body 1 and the abutting part between the inner wall of the pipe body 1 and the outer wall of the inner layer plate 7. After the scale is completely removed, the problem of reduced heat transfer efficiency caused by scale accumulation can be effectively reduced, ensuring efficient operation of the steam generator, reducing energy waste, and reducing operating costs. At the same time, it can also avoid local overheating caused by scale, reduce the risk of pipe damage, prolong the overall service life of the steam generator, reduce the frequency of equipment replacement, and save equipment procurement funds.

[0028] The recess 8 at the top end of the outer side of the plurality of inner layer plates 7 and the protrusion 9 at the bottom end cooperate with each other to help stabilize the position of the inner layer plates 7 in the pipe body 1. During the operation of the steam generator, the water flow in the pipe is fast and the water flow state is complex, with conditions such as turbulent flow and vortex flow. The inner layer plates 7 are easily displaced under the continuous impact of the water flow. The recess 8 and the protrusion 9 fit with each other to form a stable limiting structure that can ensure that the inner layer plates 7 remain stable under the impact of the water flow. This not only ensures that the inner layer plates 7 continuously play a role in blocking scale and facilitating cleaning, but also prevents the inner layer plates 7 from affecting the normal flow of water in the pipe due to displacement, avoiding problems such as unstable operation of the steam generator caused by abnormal water flow, and ensuring long-term stable and efficient operation of the steam generator.

[0029] Reference Figures 2-4The top side of the connecting block 13 is provided with a threaded hole 17, and the fixed seat one 11 and the fixed seat two 15 are connected with the threaded hole 17 through the fixing assembly 14. The fixing assembly 14 comprises a through hole 1401 which is provided on the top side of the fixed seat one 11 and the fixed seat two 15 away from each other, and the inner wall of the through hole 1401 is threadedly connected with a fixing bolt 1402 which penetrates through the through hole 1401 and is threadedly connected with the threaded hole 17. The inner wall of the clamping groove 16 is detachably connected with the connecting block 13. The mounting assembly 6 comprises a plurality of sliding grooves 601 which are provided on the inner wall of the pipe body 1 at the front end, and the inner wall of the sliding groove 601 is detachably connected with a sliding block 602 which is fixedly connected to the outer side of the plurality of inner layer plates 7 at the rear end. The tooth groove 4 is threadedly connected with the tooth groove 5. The inner wall of the inner layer plate 7 is fixedly connected with the spoiler strip 10, and the outer wall of the inner layer plate 7 is in close contact with the inner wall of the pipe body 1.

[0030] Specifically, the fixed seat one 11 on the left and right sides of the rear end of the pipe body 1 and the fixed seat two 15 on the left and right sides of the front end are connected with the connecting block 13 and the fixing assembly 14, which further enhances the stability of the pipe body connection. In the actual working environment of the steam generator, the continuous impact force and vibration caused by the high-speed flow of steam or water in the pipe will cause loosening or even disconnection of the pipe body connection, affecting the normal operation of the steam generator, and even causing safety accidents. The fixed seat one 11 and the fixed seat two 15 are connected with the connecting block 13 through the fixing assembly 14 and the threaded hole 17 on the top side of the connecting block 13. The through hole 1401 in the fixing assembly 14 is provided on the top side of the outer wall of the fixed seat one 11 and the fixed seat two 15 away from each other, and the fixing bolt 1402 is threadedly connected with the through hole 1401 and the threaded hole 17. The clamping groove 16 is detachably connected with the connecting block 13. During installation, the connecting block 13 is clamped into the clamping groove 16, and then fastened through the fixing bolt 1402. This multiple fastening and connection method forms a stable mechanical structure, greatly enhances the tensile, shear and vibration resistance of the pipe body connection, effectively prevents the loosening of the pipe body connection, ensures the long-term safe and stable operation of the steam generator under complex working conditions, reduces the equipment failure and maintenance frequency caused by loose connection, and reduces the maintenance cost.

[0031] The turbulence strip 10 fixedly connected to the inner wall of the inner layer plate 7 can make the water flow in the pipe form turbulent flow, which brings many benefits. On the one hand, the scouring effect of the water flow in the turbulent state on the inner wall of the pipe and the inner wall of the inner layer plate 7 is greatly increased, the water scale originally easy to adhere and accumulate on the pipe wall is difficult to stay under the strong scouring force, the water scale adhesion is significantly reduced, thereby avoiding the problems of the decrease of the inner diameter of the pipeline, the increase of the water flow resistance and the decrease of the heat transfer efficiency caused by the accumulation of the water scale, ensuring the efficient operation of the steam generator and reducing the energy consumption. On the other hand, the turbulent flow enhances the heat exchange efficiency between the fluid in the pipe and the heating medium outside the pipe, so that the heat transfer is more sufficient and rapid, the steam generator can produce steam faster and more stably, the overall operation efficiency is improved, the high requirements of the steam quantity and the timeliness of steam supply in production are met, which helps to improve the production efficiency and enhance the competitiveness of enterprises.

[0032] Working principle: during installation, the inner layer plate 7 is connected to the sliding groove 601 at the front end of the inner wall of the pipe body 1 through the sliding block 602, and the recess 8 at the top end of the outer side of the inner layer plate 7 and the protruding block 9 at the bottom end are matched to stabilize the position, at this time, the turbulence strip 10 at the inner wall of the inner layer plate 7 has been set in place; then, a plurality of pipe bodies are threadedly connected into a pipeline system through the thread 4 at the front end wide diameter port 2 and the thread port 5 at the rear end narrow diameter port 3; then, the connecting block 13 rotatably connected in the reserved groove 12 at the outer side of the rear end fixed seat one 11 is clamped into the clamping groove 16 at the outer side of the front end fixed seat two 15, and then the fixed bolt 1402 is threadedly connected through the through hole 1401 at the top side of the outer wall of the fixed seat one 11 and the fixed seat two 15 and the screw hole 17 at the top side of the connecting block 13, thereby completing the stable connection between the pipelines. During work, the water flow in the pipe, the turbulence strip 10 makes the water flow form turbulent flow, enhances the scouring of the inner wall of the pipe and the inner wall of the inner layer plate 7 to reduce the adhesion of the water scale, and improves the heat exchange efficiency; the impact force and vibration generated during the operation of the steam generator are resisted by the stable mechanical structure formed by the fixed seat one 11, the fixed seat two 15, the connecting block 13 and the fixed assembly 14, thereby preventing the loosening of the pipe body connection; when maintenance is needed, the threads at the pipe body connection can be unscrewed, the inner layer plate 7 can be disassembled for water scale cleaning and inspection and repair of each part.

[0033] Finally, it should be pointed out that the above description is only the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A stainless steel seamless steel pipe for a steam generator, characterized by, The utility model relates to a pipe body (1), the pipe body (1) front end is equipped with wide diameter mouth (2), the wide diameter mouth (2) inner wall is provided with the tooth pattern (4), the pipe body (1) rear end is equipped with narrow diameter mouth (3), the narrow diameter mouth (3) outside is equipped with tooth mouth (5), the pipe body (1) inner wall is connected with a plurality of inner layer boards (7) through mounting assembly (6), a plurality of the inner layer board (7) outside top end is fixedly connected with recess (8), a plurality of the inner layer board (7) outside bottom end is equipped with protruding block (9), the pipe body (1) outer wall rear end's left and right sides are all fixedly connected with fixed seat one (11), the fixed seat one (11) outside is all equipped with reserved slot (12), the reserved slot (12) inner wall rear end is rotatably connected with connecting block (13), the pipe body (1) outer wall front end's left and right sides are all fixedly connected with fixed seat two (15), the fixed seat two (15) outside is all equipped with clamping groove (16).

2. A stainless steel seamless steel pipe for a steam generator according to claim 1, characterized by: The connecting block (13) top side is equipped with screw hole (17), and the fixed seat one (11) and fixed seat two (15) are connected with screw hole (17) through fixed component (14).

3. A stainless steel seamless steel pipe for a steam generator according to claim 2, characterized by: The fixed component (14) includes through -hole (1401), and the through -hole (1401) is equipped in the outer wall top side of fixed seat one (11) and fixed seat two (15) and is apart from one end, the fixed bolt (1402) is screw connected on the inner wall of through -hole (1401), and the fixed bolt (1402) penetrates through through -hole (1401) and is screw connected with screw hole (17).

4. The stainless steel seamless steel pipe for a steam generator according to claim 1, characterized by: The inner wall of clamping groove (16) is detachably connected with connecting block (13).

5. The stainless steel seamless steel pipe for a steam generator according to claim 1, characterized by: The mounting assembly (6) includes a plurality of sliding grooves (601), the sliding groove (601) is equipped in the pipe body (1) inner wall front end, the sliding groove (601) inner wall is detachably connected with sliding block (602), and the sliding block (602) is fixedly connected on the outer side rear end of a plurality of inner layer boards (7).

6. The stainless steel seamless steel pipe for a steam generator according to claim 1, characterized by: The tooth pattern (4) is screw connected with tooth mouth (5).

7. The stainless steel seamless steel pipe for a steam generator according to claim 1, characterized by: The inner layer board (7) inner wall is fixedly connected with the spoiler strip (10), and the outer wall of the inner layer board (7) is attached with the inner wall of the pipe body (1).

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