CN112413564A

CN112413564A - Built-in desuperheater

Info

Publication number: CN112413564A
Application number: CN202011353395.5A
Authority: CN
Inventors: 曾山; 倪蓁蓁
Original assignee: Jiangsu Yanfu Power Station Valve & Auxiliary Device Manufacture Co ltd
Current assignee: Jiangsu Yanfu Power Station Valve & Auxiliary Device Manufacture Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-02-26

Abstract

The invention discloses a built-in desuperheater, which comprises a cylinder, wherein a first arc-shaped plate and a second arc-shaped plate are annularly arranged on the inner wall of the cylinder, the first arc-shaped plate and the second arc-shaped plate are clamped, cooling pipes are arranged in the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are spirally wound in the first arc-shaped plate and the second arc-shaped plate, the water inlet ends of the cooling pipes are fixedly communicated with a water inlet pipe, the water outlet ends of the cooling pipes are fixedly communicated with a water outlet pipe, a closed cavity is formed by arranging two groups of partition plates and the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are arranged in the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are spirally wound in the first arc-shaped plate and the second arc-shaped plate, cooling water is injected into the cooling pipes from the water inlet pipes to carry out steam heat exchange and temperature reduction, so that the flowing time of the, thereby increasing the heat exchange efficiency and effectively increasing the heat exchange efficiency.

Description

Built-in desuperheater

Technical Field

The invention belongs to the technical field of desuperheaters, and particularly relates to a built-in desuperheater.

Background

The device for adjusting the temperature of the superheated reheat steam by using water as a cooling medium has the functions of controlling and keeping the temperature of the superheated steam or the temperature of the reheat steam at a specified value and preventing the pipe walls of the superheater and the reheater from being heated. Desuperheaters are classified into surface type and water spray type. The surface type desuperheater is a dividing wall type heat exchanger with U-shaped pipe or coiled pipe in the cylindrical barrel, the feed water in front of the economizer is used as cooling water to flow in the pipe, no special requirement is made on the quality of the cooling water, but the surface type desuperheater has large volume, is easy to generate thermal fatigue, has large regulation delay and small regulation range, and is suitable for low and medium pressure boilers.

Protecting the superheater, the steam turbine, the corresponding steam pipeline and the valve. When the steam temperature is above 460 ℃, the high-temperature superheater, the high-pressure part of the steam turbine and the pipeline valve are all made of alloy steel materials. The allowable temperature of alloy steel materials is high but the alloy steel materials are expensive, and in order to reduce the manufacturing cost, the alloy steel is generally operated at the upper limit of the allowable use temperature of the materials, and a margin is left. As long as the steam temperature is in the specified range, the equipment can work safely. The existing novel built-in desuperheater has poor effect and large temperature fluctuation of a steam outlet.

To this end, we propose a built-in desuperheater to solve the problems of the prior art.

Disclosure of Invention

The invention aims to provide a built-in desuperheater, wherein two groups of partition plates are arranged to form a closed cavity together with a first arc-shaped plate and a second arc-shaped plate, cooling pipes are arranged in the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are spirally wound in the first arc-shaped plate and the second arc-shaped plate, cooling water is injected into the cooling pipes from water inlet pipes to perform steam heat exchange and temperature reduction, the flowing time of the cooling water in the first arc-shaped plate and the second arc-shaped plate can be prolonged, and further the heat exchange efficiency is increased, so that the problems in the background technology are solved.

In order to achieve the purpose, the invention adopts the following technical scheme: a built-in desuperheater comprises a barrel, wherein a first arc-shaped plate and a second arc-shaped plate are annularly arranged on the inner wall of the barrel and clamped with each other, cooling pipes are arranged in the first arc-shaped plate and the second arc-shaped plate and spirally coiled in the first arc-shaped plate and the second arc-shaped plate, a water inlet pipe is fixedly communicated with the water inlet end of each cooling pipe, a water outlet pipe is fixedly communicated with the water outlet end of each cooling pipe, partition plates are clamped on two sides of each of the first arc-shaped plate and the second arc-shaped plate, one end of each water inlet pipe and one end of each water outlet pipe penetrate through one side of each of the two partition plates, a first connecting pipeline, an air inlet pipe, a detection pipe and a second connecting pipeline are sequentially and fixedly communicated on the top end of the barrel from left to right, one end of each first connecting pipeline, one end of each air inlet pipe, one end of each detection pipe, an air outlet pipe and a second connecting pipeline are fixedly communicated with the bottom end from left to right in sequence, one end of each air outlet pipe and one end of each second connecting pipeline penetrate through and extend into the second arc-shaped plate, one end of each first connecting pipeline is provided with a pressure sensor, two groups of second connecting pipelines are internally provided with thermal resistance sensors, one end of the cylinder body close to the water inlet pipe is provided with a first connecting piece, one end of the cylinder body close to the water outlet pipe is provided with a second connecting piece, the first connecting piece comprises a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are fixedly arranged on the cylinder body, a fixing block is fixedly arranged on one side of the first fixing plate, one side of the fixing block far away from the first fixing plate is fixedly connected with a first spring, a first inserting rod is fixedly connected in the first spring, one end of the first inserting rod far away from the, and two sets of second inserted bars are fixedly mounted on one side of the second fixing plate, the second connecting piece comprises an inserted plate, and the first inserted bar and the second inserted bar are both in inserted connection with the inserted plate.

Preferably, first arc and second arc all set up to the semi-arc, just first arc and second arc are connected and are constituteed the tube-shape, the draw-in groove has all been seted up at first arc both ends, the equal fixed quantity in second arc both ends is connected with the fixture block, draw-in groove and fixture block joint cooperation.

Preferably, six groups of inserting blocks are distributed on one side of the two groups of partition plates at equal intervals in an annular mode, three groups of inserting grooves are distributed on one sides of the first arc-shaped plate and the second arc-shaped plate, the inserting blocks are inserted into the inserting grooves, through holes are formed in one sides of the two groups of partition plates, and one ends of the water inlet pipe and one end of the water outlet pipe penetrate through the two groups of through holes respectively.

Preferably, two sets of baffle and first arc and second arc form closed cavity, first connecting tube, intake pipe, detection tube, second connecting tube and outlet duct one end all extend to in the closed cavity.

Preferably, all install the solenoid valve on inlet tube and the outlet pipe one end, just the cooling tube one end is kept away from to inlet tube and outlet pipe and is extended to outside the barrel, and is two sets of the solenoid valve all sets up outside the barrel.

Preferably, the first fixing plate and the second fixing plate are both set to be two sets, and the first fixing plate and the second fixing plate are respectively and fixedly installed on two sides of the barrel body, the first fixing plate and the second fixing plate are arranged on the barrel body in parallel, and the second fixing plate is arranged on the left side of the first fixing plate.

Preferably, one end of the first inserted bar is fixedly sleeved with a limiting plate, the limiting plate is located on one side of the first spring, and the limiting plate is arranged between the first fixing plate and the second fixing plate.

Preferably, a first inserting rod groove is formed in the middle of one side of the inserting plate, second inserting rod grooves are formed in two sides, located on one side of the inserting plate, of the first inserting rod groove, one end, far away from the first spring, of the first inserting rod is inserted into the first inserting rod groove, and two ends, far away from the second fixing plate, of the second inserting rods are respectively inserted into the two groups of second inserting rod grooves.

Preferably, the second connecting piece still includes second spring and briquetting, second spring and briquetting all are provided with two sets ofly, and are two sets of second spring fixed mounting is in first inserted bar inslot both sides respectively, and is two sets of briquetting fixed connection is in two sets of second spring one end respectively, first inserted bar is kept away from first spring one end and is set up between two sets of briquetting.

Preferably, first inserted bar and second inserted bar all set up to cylindrical inserted bar, the diameter in first inserted bar groove is greater than the diameter of first inserted bar, the diameter in second inserted bar groove is greater than the diameter of second inserted bar, second inserted bar and second inserted bar groove clearance fit.

The invention has the technical effects and advantages that: compared with the prior art, the built-in desuperheater provided by the invention has the following advantages:

according to the invention, two groups of partition plates are arranged to form a closed cavity together with the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are arranged in the first arc-shaped plate and the second arc-shaped plate, the cooling pipes are spirally wound in the first arc-shaped plate and the second arc-shaped plate, cooling water is injected into the cooling pipes from the water inlet pipe to perform steam heat exchange and cooling, the flowing time of the cooling water in the first arc-shaped plate and the second arc-shaped plate can be prolonged, the heat exchange efficiency is further increased, the heat exchange efficiency can be effectively increased, the steam in the cylinder body is monitored in real time by arranging the air inlet pipe, the first connecting pipeline, the detection pipe and the second connecting pipeline in a matched manner, the temperature of a steam outlet is adjusted, the stability of the temperature of the steam outlet is further ensured, and finally, the installation of the cylinder body is facilitated by arranging.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic partial side view of the present invention;

FIG. 3 is a side view of the separator of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 1 at A;

FIG. 5 is an enlarged schematic view of the structure of FIG. 1 at B.

In the figure: 1. a barrel; 2. a first arc-shaped plate; 201. a card slot; 3. a second arc-shaped plate; 301. a clamping block; 4. a cooling tube; 5. a partition plate; 501. inserting a block; 502. a through hole; 6. a slot; 7. a water inlet pipe; 8. a water outlet pipe; 9. an electromagnetic valve; 10. a first connecting pipe; 11. a pressure sensor; 12. an air inlet pipe; 13. an air outlet pipe; 14. a second connecting pipe; 15. a thermal resistance sensor; 16. a first connecting member; 17. a first fixing plate; 18. a fixed block; 19. a first spring; 20. a limiting plate; 21. a second fixing plate; 22. a first plunger; 23. a second plunger; 24. a second connecting member; 25. inserting plates; 2501. a second slot for a rod; 2502. a first plunger slot; 2503. a second spring; 2504. briquetting; 26. and (6) detecting the tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme as shown in figures 1-5: a built-in desuperheater comprises a barrel body 1, wherein a first arc-shaped plate 2 and a second arc-shaped plate 3 are annularly arranged on the inner wall of the barrel body 1, the first arc-shaped plate 2 and the second arc-shaped plate 3 are clamped, the first arc-shaped plate 2 and the second arc-shaped plate 3 are both arranged to be semi-arc-shaped plates, the first arc-shaped plate 2 and the second arc-shaped plate 3 are connected to form a barrel shape, clamping grooves 201 are formed in two ends of the first arc-shaped plate 2, clamping blocks 301 are fixedly connected to two ends of the second arc-shaped plate 3, the clamping grooves 201 are in clamping fit with the clamping blocks 301, the first arc-shaped plate 2 and the second arc-shaped plate 3 are connected more stably, and the first arc-shaped plate 2 and the;

cooling pipes 4 are arranged in the first arc-shaped plate 2 and the second arc-shaped plate 3, the cooling pipes 4 are spirally wound in the first arc-shaped plate 2 and the second arc-shaped plate 3, water inlet pipes 7 are fixedly communicated with the water inlet ends of the cooling pipes 4, water outlet pipes 8 are fixedly communicated with the water outlet ends of the cooling pipes 4, partition plates 5 are clamped on two sides of the first arc-shaped plate 2 and the second arc-shaped plate 3 respectively, one ends of the water inlet pipes 7 and one ends of the water outlet pipes 8 penetrate through one sides of the two groups of partition plates 5 respectively, six groups of inserting blocks 501 are distributed on one side of the two groups of partition plates 5 in an annular and equidistant mode, three groups of inserting grooves 6 are distributed on one sides of the first arc-shaped plate 2 and the second arc-shaped plate 3 respectively, the inserting blocks 501 are inserted in the inserting grooves 6, through holes 502 are formed in one sides of the two groups of partition plates 5, one ends of the water inlet pipes 7 and one ends of; the through hole 502 is arranged to facilitate the penetration of the water inlet pipe 7 and the water outlet pipe 8; the two groups of partition plates 5, the first arc-shaped plate 2 and the second arc-shaped plate 3 form a closed cavity, one ends of the first connecting pipeline 10, the air inlet pipe 12, the detection pipe 26, the second connecting pipeline 14 and the air outlet pipe 13 extend into the closed cavity, a sealed space is formed in the barrel body 1, heat transfer between steam and the outside of the barrel body 1 can be reduced, and heat utilization rate is increased; meanwhile, the air tightness and the stability of the whole cavity are improved; the electromagnetic valves 9 are respectively arranged at one end of the water inlet pipe 7 and one end of the water outlet pipe 8, which are far away from the cooling pipe 4, the water inlet pipe 7 and one end of the water outlet pipe 8 extend out of the cylinder body 1, the two groups of electromagnetic valves 9 are respectively arranged outside the cylinder body 1, and the electromagnetic valves 9 are arranged for controlling the flow of cooling water;

a first connecting pipeline 10, an air inlet pipe 12, a detection pipe 26 and a second connecting pipeline 14 are fixedly communicated with the top end of the barrel 1 from left to right in sequence, one ends of the first connecting pipeline 10, the air inlet pipe 12, the detection pipe 26 and the second connecting pipeline 14 are all penetrated through and extend into the first arc-shaped plate 2, an air outlet pipe 13 and a second connecting pipeline 14 are fixedly communicated with the bottom end of the barrel from left to right in sequence, one ends of the air outlet pipe 13 and the second connecting pipeline 14 are all penetrated through and extend into the second arc-shaped plate 3, one end of the first connecting pipeline 10 is provided with a pressure sensor 11, two groups of second connecting pipelines 14 are all provided with thermal resistance sensors 15, the temperature of derived steam is collected in real time by the detection pipe 26, and data is collected by the thermal;

a first connecting piece 16 is arranged at one end, close to the water inlet pipe 7, of the barrel body 1, a second connecting piece 24 is arranged at one end, close to the water outlet pipe 8, of the barrel body 1, the first connecting piece 16 comprises a first fixing plate 17 and a second fixing plate 21, the first fixing plate 17 and the second fixing plate 21 are fixedly arranged on the barrel body 1, the first fixing plate 17 and the second fixing plate 21 are arranged into two groups, the two groups of first fixing plate 17 and the two groups of second fixing plate 21 are fixedly arranged on two sides of the barrel body 1 respectively, the first fixing plate 17 and the second fixing plate 21 are arranged on the barrel body 1 in parallel, the second fixing plate 21 is arranged on the left side of the first fixing plate 17, and the two groups of first fixing plate 17; a limiting plate 20 is fixedly sleeved at one end of the first inserted rod 22, the limiting plate 20 is positioned on one side of the first spring 19, the limiting plate 20 is arranged between the first fixing plate 17 and the second fixing plate 21, and the limiting plate 20 is arranged to enable the compression force of the first spring 19 to be stronger, so that the first inserted rod 22 is more stably inserted; a first inserted bar groove 2502 is formed in the center of one side of the inserted plate 25, second inserted bar grooves 2501 are formed in two sides of one side of the inserted plate 25, which is located on the first inserted bar groove 2502, one end of the first inserted bar 22, which is far away from the first spring 19, is inserted into the first inserted bar groove 2502, one ends of the two groups of second inserted bars 23, which are far away from the second fixing plate 21, are respectively inserted into the two groups of second inserted bar grooves 2501, and a structure that the first inserted bar 22 is matched with the first inserted bar groove 2502 is arranged, so that the first inserted bar 22 is more stably inserted; the structure that the second insertion rod 23 is matched with the second insertion rod slot 2501 is arranged, so that the second insertion rod 23 is inserted more stably;

a fixed block 18 is fixedly arranged on one side of the first fixed plate 17, a first spring 19 is fixedly connected to one side of the fixed block 18, which is far away from the first fixed plate 17, a first inserted bar 22 is fixedly connected in the first spring 19, one end of the first inserted bar 22, which is far away from the first spring 19, penetrates and extends to one side of the second fixed plate 21, two groups of second inserted bars 23 are fixedly arranged on one side of the second fixed plate 21, a second connecting piece 24 comprises an inserted plate 25, the first inserted bar 22 and the second inserted bar 23 are both in inserted fit with the inserted plate 25, the second connecting piece 24 further comprises a second spring 2503 and a pressing block 2504, two groups of second springs 2503 and pressing blocks 2504 are both arranged, two groups of second springs 2503 are respectively and fixedly arranged on two sides in the first inserted bar groove 2502, two groups of pressing blocks 2504 are respectively and fixedly connected to one ends of the two groups of second springs 2503, one end of the first inserted bar 22, which is far away from the first spring 19, the first spring 19 can be compressed to enlarge the space in the first rod slot 2502, and after the end of the first rod 22 far away from the first spring 19 is inserted, the pressing block 2504 presses the first rod 22 to enable the insertion to be more stable; first inserted bar 22 and second inserted bar 23 all set up to cylindrical inserted bar, and the diameter of first inserted bar groove 2502 is greater than the diameter of first inserted bar 22, and the diameter of second inserted bar groove 2501 is greater than the diameter of second inserted bar 23, and second inserted bar 23 and second inserted bar groove 2501 clearance fit prevent that second spring 2503 and briquetting 2504 can not put into first inserted bar groove 2502, set up second inserted bar 23 and second inserted bar groove 2501 clearance fit and make second inserted bar 23 grafting more stable.

Working principle or structural principle: when the cooling device is used, steam is guided in from the air inlet pipe 12 and enters the two groups of partition plates 5 to form a closed cavity together with the first arc-shaped plate 2 and the second arc-shaped plate 3, cooling water enters the cooling pipes 4 in the first arc-shaped plate 2 and the second arc-shaped plate 3 from the water inlet pipe 7 by workers, the cooling pipes 4 are spirally wound in the first arc-shaped plate 2 and the second arc-shaped plate 3, the water inlet ends of the cooling pipes 4 are fixedly communicated with the water inlet pipe 7, the water outlet ends of the cooling pipes 4 are fixedly communicated with the water outlet pipe 8, the partition plates 5 are clamped on two sides of the first arc-shaped plate 2 and the second arc-shaped plate 3, one ends of the water inlet pipe 7 and the water outlet pipe 8 penetrate through one side of the two groups of partition plates 5 respectively, the flowing time of the cooling water in the first arc-shaped; the steam with higher temperature exchanges heat with the cooling water in the cooling pipe 4, the temperature of the steam is reduced, and the steam is led out from the air outlet pipe 13; the temperature of the normal temperature water after heat exchange rises and is led out from the air outlet pipe 13; meanwhile, the temperature of the derived steam is collected in real time by the detection pipe 26, data are collected by the thermal resistance sensor 15, if the temperature is higher than the expected height, a worker can control the electromagnetic valve 9 to inject more cooling water into the cooling pipe 4 until the derived steam temperature value is within a preset temperature value range, and the barrel 1 can be conveniently installed by arranging the first connecting piece 16 and the second connecting piece 24.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The built-in desuperheater comprises a cylinder body (1), and is characterized in that: barrel (1) inner wall annular is provided with first arc (2) and second arc (3), first arc (2) and second arc (3) joint, be provided with cooling tube (4) in first arc (2) and second arc (3), cooling tube (4) spiral is circled in first arc (2) and second arc (3), the fixed intercommunication of the end of intaking of cooling tube (4) has inlet tube (7), the fixed intercommunication of the play water end of cooling tube (4) has outlet pipe (8), the equal joint in first arc (2) and second arc (3) both sides has baffle (5), inlet tube (7) and outlet pipe (8) one end run through respectively in two sets of baffles (5) one side, from left to right fixed intercommunication in proper order on barrel (1) top has first connecting tube (10), The gas inlet pipe (12), the detection pipe (26) and the second connecting pipeline (14), one end of each of the first connecting pipeline (10), the gas inlet pipe (12), the detection pipe (26) and the second connecting pipeline (14) penetrates through and extends into the first arc-shaped plate (2), the bottom end is fixedly communicated with the gas outlet pipe (13) and the second connecting pipeline (14) from left to right, one end of each of the gas outlet pipe (13) and the second connecting pipeline (14) penetrates through and extends into the second arc-shaped plate (3), one end of each of the first connecting pipelines (10) is provided with the pressure sensor (11), two groups of the second connecting pipelines (14) are provided with the thermal resistance sensors (15), one end of the cylinder body (1) close to the water inlet pipe (7) is provided with the first connecting piece (16), one end of the cylinder body (1) close to the water outlet pipe (8) is provided with the second connecting piece (24), first connecting piece (16) include first fixed plate (17) and second fixed plate (21), first fixed plate (17) and the equal fixed mounting of second fixed plate (21) are on barrel (1), first fixed plate (17) one side fixed mounting has fixed block (18), first fixed plate (17) one side fixedly connected with first spring (19) are kept away from to fixed block (18), first inserted bar (22) of fixedly connected with in first spring (19), first spring (19) one end is kept away from in first inserted bar (22) runs through and extends to second fixed plate (21) one side, second fixed plate (21) one side fixed mounting has two sets of second inserted bars (23), second connecting piece (24) are including picture peg (25), first inserted bar (22) and second inserted bar (23) all with picture peg (25) grafting cooperation.

2. A built-in desuperheater according to claim 1, wherein: first arc (2) and second arc (3) all set up to half arc, just first arc (2) and second arc (3) are connected and are constituteed the tube-shape, draw-in groove (201) have all been seted up at first arc (2) both ends, the equal fixed quantity in second arc (3) both ends is connected with fixture block (301), draw-in groove (201) and fixture block (301) joint cooperation.

3. A built-in desuperheater according to claim 1, wherein: two sets of baffle (5) one side annular equidistance distributes has six inserts (501), it has three group slots (6) to distribute equally on first arc (2) and second arc (3) one side, insert (501) are pegged graft in slot (6), and are two sets of through-hole (502) have all been seted up to baffle (5) one side, inlet tube (7) and outlet pipe (8) one end run through respectively in two sets of through-holes (502).

4. A built-in desuperheater according to claim 1, wherein: two sets of baffle (5) and first arc (2) and second arc (3) form the closed cavity, first connecting tube (10), intake pipe (12), sense tube (26), second connecting tube (14) and outlet duct (13) one end all extend to in the closed cavity.

5. A built-in desuperheater according to claim 1, wherein: all install solenoid valve (9) on inlet tube (7) and outlet pipe (8) one end, just outside cooling tube (4) one end was kept away from in inlet tube (7) and outlet pipe (8) extended to barrel (1), two sets of solenoid valve (9) all set up outside barrel (1).

6. A built-in desuperheater according to claim 1, wherein: first fixed plate (17) and second fixed plate (21) all set up to two sets ofly, and two sets of first fixed plate (17) and second fixed plate (21) are fixed mounting respectively in barrel (1) both sides, just first fixed plate (17) and second fixed plate (21) parallel arrangement are on barrel (1), just second fixed plate (21) set up in the left side of first fixed plate (17).

7. A built-in desuperheater according to claim 1, wherein: one end of the first inserted bar (22) is fixedly sleeved with a limiting plate (20), the limiting plate (20) is located on one side of the first spring (19), and the limiting plate (20) is arranged between the first fixing plate (17) and the second fixing plate (21).

8. A built-in desuperheater according to claim 1, wherein: first inserted bar groove (2502) have been seted up to picture peg (25) one side central point, second inserted bar groove (2501) have all been seted up to picture peg (25) one side position in first inserted bar groove (2502) both sides, first inserted bar (22) are kept away from first spring (19) one end and are pegged graft in first inserted bar groove (2502), and are two sets of second inserted bar (23) are kept away from second fixed plate (21) one end and are pegged graft respectively in two sets of second inserted bar grooves (2501).

9. A built-in desuperheater according to claim 1, wherein: second connecting piece (24) still includes second spring (2503) and briquetting (2504), second spring (2503) and briquetting (2504) all are provided with two sets ofly, two sets of both sides in first inserted bar groove (2502) are fixed mounting respectively in second spring (2503), and are two sets of briquetting (2504) are fixed connection in two sets of second spring (2503) one end respectively, first spring (19) one end is kept away from in first inserted bar (22) and is set up between two sets of briquetting (2504).

10. An in-line desuperheater of claim 8, wherein: first inserted bar (22) and second inserted bar (23) all set up to cylindrical inserted bar, the diameter of first inserted bar groove (2502) is greater than the diameter of first inserted bar (22), the diameter of second inserted bar groove (2501) is greater than the diameter of second inserted bar (23), second inserted bar (23) and second inserted bar groove (2501) clearance fit.