阅读说明：本技术 无头除氧器 (Oxygen remover without head ) 是由 张爱军 张绍庭 刘青林 赵至蓬 张龙生 李海波 于 2019-09-06 设计创作，主要内容包括：本发明涉及一种无头除氧器,其包括中空罐体,所述中空罐体轴线两端分别开设有人孔,中空罐体上还设置有封闭人孔的安全门,还包括引风装置,所述引风装置包括引风机和引风管道,所述引风管道一端与引风机的进风口连通,另一端延伸至对应的人孔内,所述人孔内设置有限制引风管道的限位装置。本发明具有加快除氧器降温速度,提高工作效率的效果。(The invention relates to a headless deaerator, which comprises a hollow tank body, wherein two ends of the axis of the hollow tank body are respectively provided with a manhole, the hollow tank body is also provided with a safety door for sealing the manhole, the deaerator also comprises an air inducing device, the air inducing device comprises an induced draft fan and an induced draft pipeline, one end of the induced draft pipeline is communicated with an air inlet of the induced draft fan, the other end of the induced draft pipeline extends into the corresponding manhole, and a limiting device for limiting the induced draft pipeline is arranged in the manhole. The invention has the effects of accelerating the cooling speed of the deaerator and improving the working efficiency.)

1. the utility model provides a no first oxygen-eliminating device, includes the cavity jar body (1), manhole (2) have been seted up respectively at cavity jar body (1) axis both ends, still are provided with emergency exit (3) that seal manhole (2) on the cavity jar body (1), its characterized in that: still include induced air device (4), induced air device (4) are including draught fan (41) and induced air pipeline (42), induced air pipeline (42) one end and the air intake intercommunication of draught fan (41), the other end extends to in manhole (2) that correspond, be provided with the stop device of limiting induced air pipeline (42) in manhole (2).

2. The capless deaerator of claim 1, wherein: the limiting device comprises a limiting frame (6) and an inserting rod (7) arranged on the outer wall of the limiting frame (6), and the inserting rod (7) is inserted into the inner wall of the manhole (2).

3. The capless deaerator of claim 2, wherein: offer on manhole (2) inner wall and correspond concave groove (8) that supply bayonet pole (7) slip grafting, concave groove (8) include two straight flute one (81) along manhole (2) axis parallel arrangement and straight flute two (82) of two straight flute one (81) of perpendicular intercommunication, the width of straight flute one (81) and straight flute two (82) is all not less than the external diameter of bayonet pole (7), and one of them straight flute one (81) and the outer wall intercommunication of the cavity jar body (1), and another straight flute one (81) seals the setting along the both ends of manhole (2) axis.

4. The capless deaerator of claim 2, wherein: the limiting frame (6) comprises an outer ring (61), an inner ring (62) and a plurality of connecting rods (63) for connecting the outer ring (61) and the inner ring (62); the inner diameter of the inner ring (62) is not smaller than the outer diameter of the induced draft pipeline (42), and a limiting piece for limiting the displacement of the induced draft pipeline (42) is arranged on the inner ring (62).

5. The capless deaerator of claim 4, wherein: the limiting piece comprises a first limiting ring (11) arranged at one end of the air guide pipeline (42) and a plurality of limiting plates (10) arranged at one side of the inner ring (62) facing the inside of the hollow tank body (1); the outer diameter of the first limiting ring (11) is smaller than the inner diameter of the inner ring (62); one end of the limiting plate (10) is rotatably connected to the inner ring (62), and when the limiting ring I (11) overturns, the distance between one end of the limiting plate and the circle center of the inner ring (62) is smaller than the radius of the limiting ring I (11).

6. The capless deaerator of claim 1, wherein: one side of the hollow tank body (1) opposite to the air inducing device (4) is further provided with an air blowing device (5), the air blowing device (5) comprises an air blower (51) and an air blowing pipeline (52), one end of the air blowing pipeline (52) is communicated with an air outlet of the air blower (51), and the other end of the air blowing pipeline extends into the corresponding manhole (2).

7. The capless deaerator of claim 6, wherein: the manhole (2) is also internally provided with a limiting frame (6) for limiting a blast pipeline (52) and an inserting rod (7) arranged on the outer wall of the limiting frame (6), and the inserting rod (7) is inserted into the inner wall of the manhole (2).

8. The capless deaerator of claim 7, wherein: offer the L type groove that corresponds confession peg graft that slides of manhole (2) inner wall, L type groove includes straight flute one (81) along manhole (2) axis parallel arrangement and straight flute two (82) of perpendicular intercommunication straight flute one (81), the external diameter that the width of straight flute one (81) and straight flute two (82) is all not less than peg graft pole (7), the one end and the hollow tank body (1) outer wall intercommunication of straight flute one (81).

9. the capless deaerator of claim 8, wherein: the limiting frame (6) comprises an outer ring (61), an inner ring (62) and a plurality of connecting rods (63) for connecting the outer ring (61) and the inner ring (62); the inner diameter of the inner ring (62) is not smaller than the outer diameter of the blast pipe (52), and a circle of limiting ring II (12) which is larger than the inner diameter of the inner ring (62) is arranged on the outer wall of the blast pipe (52).

Technical Field

The invention relates to the technical field of auxiliary equipment of a steam turbine, in particular to a headless deaerator.

Background

At present, the headless deaerator is also called a built-in deaerator, and has no deaerating tower, and the deaerating process is completed in a deaerating water tank. This deaerator is an integrated deaerator. The oxygen remover mainly comprises a sealing head, a cylinder, a support, an internal component and the like.

The prior Chinese patent with the publication number of CN207227051U discloses a headless deaerator, which comprises a cylindrical hollow tank body, wherein safety doors are arranged at two ends of the hollow tank body, a water inlet is respectively arranged at two sides of the upper end of the hollow tank body, a water outlet is arranged in the middle of the lower end of the hollow tank body, an air outlet is arranged at two sides of each water inlet, a recirculation interface and a four-air-pumping and air-supplying interface are arranged in the middle of the upper end of the hollow tank body, and an auxiliary steam supply interface and a high-pressure drainage interface are arranged at the outer side of; a recycling interface is arranged between the water inlet at the left end of the tank body and the recycling interface, and between the four-pumping air supply interface and the water inlet at the right end of the tank body; the tank body of the hollow tank body is connected with a local water level meter; the two safety doors are also provided with manholes.

The above prior art solutions have the following drawbacks: when the deaerator runs for a period of time, the deaerator needs to stop running for maintenance, before the maintenance, the deaerator needs to be emptied, and when the safety door is opened, the temperature in the deaerator is reduced to room temperature, workers can enter the deaerator from a manhole for maintenance; however, in the process of the operation work of the deaerator, the general internal temperature can be kept at about 300 ℃, the deaerator is large in size, if the deaerator is cooled down and only depends on two manholes to circulate with the outside air, the deaerator needs to consume a long time, and the working efficiency is influenced.

Disclosure of Invention

The invention aims to provide a headless deaerator which has the effects of accelerating the cooling speed of the deaerator and improving the working efficiency.

The above object of the present invention is achieved by the following technical solutions:

The utility model provides a no first oxygen-eliminating device, includes the cavity jar body, the manhole has been seted up respectively at cavity jar body axis both ends, still is provided with the emergency exit of sealing the manhole on the cavity jar body, still includes the induced air device, the induced air device includes draught fan and induced air pipeline, induced air pipeline one end and the air intake intercommunication of draught fan, the other end extends to in the manhole that corresponds, set up the stop device who has the restriction induced air pipeline in the manhole.

By adopting the technical scheme, when the deaerator needs to be overhauled, the deaerator is firstly emptied, then the safety doors on the two sides are opened, then the limiting device is utilized to limit one end of the air guiding pipeline in one manhole, the draught fan is started, hot air in the hollow tank body can be sequentially discharged to the outside through the air guiding pipeline, the air circulation inside and outside the hollow tank body is accelerated, the effect of quickly cooling the hollow tank body is achieved, and after the temperature is reduced, a worker can drill into the hollow tank body from the manhole for overhauling; meanwhile, because the hollow tank body is relatively sealed, workers can feel very sultry and easily heatstroke under the sultry environment for a long time if working for a long time, and the wind speed of the draught fan can be adjusted at the moment, so that the draught fan still drives the air in the hollow tank body to flow, the sultry of the workers is relieved, and the comfort level of the workers is improved.

the invention is further configured to: the limiting device comprises a limiting frame and an insertion rod arranged on the outer wall of the limiting frame, and the insertion rod is inserted into the inner wall of the manhole.

By adopting the technical scheme, because the manhole needs to be provided with a large inner diameter for people to enter, if the manhole is matched with an induced draft pipeline with the same size, on one hand, the cost is increased, and on the other hand, the induced draft pipeline is heavy in weight, so that the installation of the induced draft pipeline and the manhole is inconvenient for workers; utilize spacing to support the induced duct, recycle the grafting relation of peg graft pole and manhole inner wall, make it can install the induced duct that the internal diameter is less in the manhole, practiced thrift the cost on the one hand, on the other hand is convenient for the staff to the dismouting of induced duct.

The invention is further configured to: the manhole inner wall is provided with a concave groove corresponding to the sliding insertion of the insertion rod, the concave groove comprises two straight grooves I arranged in parallel along the axis of the manhole and a straight groove II vertically communicated with the two straight grooves I, the widths of the straight grooves I and the straight groove II are not smaller than the outer diameter of the insertion rod, one straight groove I is communicated with the outer wall of the hollow tank body, and the other straight groove I is arranged in a closed mode along two ends of the axis of the manhole.

By adopting the technical scheme, the induced draft fan generates suction effect on air in the hollow tank body through the induced draft pipeline, so that displacement force towards one side outside the hollow tank body is given to the induced draft pipeline; when the limiting frame is installed, the inserting rod can be inserted into the corresponding straight groove I communicated with the outside of the hollow tank body, the limiting frame is driven to rotate in the circumferential direction to approach the straight groove II, the inserting rod is inserted into the other straight groove I by outward displacement, and the limiting frame is stably installed in the manhole under the action of suction force of the draught fan, so that the installation work of the limiting frame and the manhole is realized;

If need take off spacing, also only need manually order about the inserted link along the orbit displacement of concave groove, remove the cooperation relation of spacing and manhole, be convenient for realize the dismouting work to spacing.

The invention is further configured to: the limiting frame comprises an outer ring, an inner ring and a plurality of connecting rods for connecting the outer ring and the inner ring; the inner diameter of the inner ring is not smaller than the outer diameter of the air guide pipeline, and a limiting part for limiting the displacement of the air guide pipeline is arranged on the inner ring.

By adopting the technical scheme, the connecting rod is utilized to connect the outer ring and the inner ring to form a complete limiting frame, so that the inner ring air guide pipeline is spliced, the limiting part is utilized to limit the air guide pipeline, and a gap can be reserved between the outer ring and the inner ring, so that the air inside and outside the hollow tank body can be conveniently circulated.

The invention is further configured to: the limiting piece comprises a first limiting ring arranged at one end of the induced draft pipeline and a plurality of limiting plates arranged at one side of the inner ring facing the hollow tank body; the outer diameter of the first limiting ring is smaller than the inner diameter of the inner ring; one end of the limiting plate is rotatably connected to the inner ring, and when the limiting ring I turns over, the distance between one end of the limiting plate and the circle center of the inner ring is smaller than the radius of the limiting ring I.

By adopting the technical scheme, when the induced draft pipeline is installed, because the limiting plate is rotatably connected with the inner ring, one end of the induced draft pipeline is firstly inserted into the inner ring, so that the limiting plate is driven to turn over and move forward for one end distance, then the limiting plate is manually driven to rotate, the induced draft pipeline is manually driven to move backward, the limiting ring I is abutted against the limiting plate, and then the induced draft fan is started to play a suction force for the induced draft pipeline, so that the limiting ring I on the induced draft pipeline keeps the abutting action with the limiting plate, and the quick installation work of the induced draft pipeline and the limiting frame is realized;

And then when needing to take off the induced duct, can directly overturn the limiting plate, make its limiting plate keep away from the hole of inner ring, make it can directly pull out the induced duct from the inner ring, the quick assembly disassembly work of induced duct and spacing of being convenient for.

the invention is further configured to: and one side of the hollow tank body, which is opposite to the air inducing device, is also provided with an air blowing device, the air blowing device comprises an air blower and an air blowing pipeline, one end of the air blowing pipeline is communicated with an air outlet of the air blower, and the other end of the air blowing pipeline extends into a corresponding manhole.

Through adopting above-mentioned technical scheme, when the air-blower started, can be with in external air carried to the hollow tank body through the blast pipe, make manhole one side air inlet, the air-out of one side of its hollow tank body both sides, further accelerate the internal air flow velocity of hollow tank, improve the internal cooling rate of hollow tank.

The invention is further configured to: the manhole is also internally provided with a limiting frame for limiting the blast pipeline and an inserting rod arranged on the outer wall of the limiting frame, and the inserting rod is inserted into the inner wall of the manhole.

By adopting the technical scheme, as the manhole needs to be provided with a large inner diameter for people to enter, if the air blowing pipeline is matched with the same size, on one hand, the cost is increased, and on the other hand, the weight of the air blowing pipeline is heavy, so that the installation of the air blowing pipeline and the manhole is inconvenient for workers; utilize spacing to support the blast pipe, recycle the grafting relation of peg graft pole and manhole inner wall, make it can install the blast pipe that the internal diameter is less in the manhole, practiced thrift the cost on the one hand, on the other hand is convenient for the staff to the dismouting of blast pipe.

The invention is further configured to: the manhole inner wall is provided with an L-shaped groove corresponding to the sliding insertion of the insertion rod, the L-shaped groove comprises a first straight groove and a second straight groove, the first straight groove is arranged in parallel along the axis of the manhole, the second straight groove is vertically communicated with the first straight groove, the width of the first straight groove and the width of the second straight groove are not smaller than the outer diameter of the insertion rod, and one end of the first straight groove is communicated with the outer wall of the hollow tank body.

By adopting the technical scheme, air is conveyed into the hollow tank body through the air blowing pipeline by the air blower, so that the air blowing pipeline is provided with a displacement force towards the inside of the hollow tank body, when the limiting frame is installed, the insertion rod can be inserted into the straight groove I, then the limiting frame is manually driven to rotate, the insertion rod slides into the straight groove II, the displacement force towards one side of the inside of the hollow tank body is provided for the insertion rod under the air blowing effect of the air blower, and the installation work of the limiting frame and the manhole is realized in the limiting manhole in which the limiting frame is stable;

when the limiting frame needs to be disassembled, the limiting frame and the insertion rod only need to be manually driven to move along the track of the L-shaped groove, the matching relation between the limiting frame and the manhole is removed, and the disassembling and assembling work of the limiting frame is convenient to realize.

The invention is further configured to: the limiting frame comprises an outer ring, an inner ring and a plurality of connecting rods for connecting the outer ring and the inner ring; the inner diameter of the inner ring is not smaller than the outer diameter of the blast pipeline, and a circle of limiting ring II which is larger than the inner diameter of the inner ring is arranged on the outer wall of the blast pipeline.

By adopting the technical scheme, when the blast pipeline is installed, only one end of the blast pipeline needs to be inserted into the inner ring until the second limit ring abuts against one side of the inner ring, and meanwhile, under the driving force of the blower on the blast pipeline, the blower keeps the abutting action of the second limit ring and the inner ring, so that the limit action on the blast pipeline is realized, and the quick installation work on the blast pipeline is completed;

When the blast pipe needs to be taken down, the blast pipe only needs to be directly pulled out of the inner ring, so that the disassembly and assembly work of workers on the blast pipe is facilitated;

The outer ring and the inner ring are connected by the connecting rod to form a complete limiting frame, so that a gap can be reserved between the outer ring and the inner ring, and the air inside and outside the hollow tank body can be conveniently circulated.

In conclusion, the beneficial technical effects of the invention are as follows:

1. When a gap needs to be formed in the hollow tank body, the hollow tank body is firstly emptied, then the safety doors on two sides are opened, and then the air inducing device arranged on one side of the hollow tank body is used for inducing air to the manhole on one side of the hollow tank body, so that external air enters from the manhole on the other side, the air circulation inside and outside the hollow tank body is accelerated, the effect of rapid heat exchange is achieved, the required cooling time is reduced, and the work efficiency is improved;

2. The air blowing device arranged on one side opposite to the air inducing device is utilized to accelerate the air on the outer side to be introduced from the manhole on the side, the air inducing device on the other side extracts the air from the hollow tank body, the circulation speed of the air inside and outside the hollow tank body is further accelerated, the required cooling time is reduced, and the work efficiency is improved;

3. The induced draft pipeline can be detachably connected with the limiting frame, the limiting frame can be detachably connected with the manhole, and the induced draft device, the blowing device and the manhole can be conveniently disassembled and assembled.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a partial structure of the air guiding duct and the limiting frame in fig. 1.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is an enlarged schematic view at B in fig. 2.

Fig. 5 is a partial structural schematic view of the blower pipe and the stopper bracket of fig. 1.

Fig. 6 is an enlarged schematic view at C in fig. 5.

in the figure, 1, a hollow tank body; 2. a manhole; 3. a safety door; 4. an air inducing device; 41. an induced draft fan; 42. an air inducing duct; 5. a blower device; 51. a blower; 52. a blast duct; 6. a limiting frame; 61. an outer ring; 62. an inner ring; 63. a connecting rod; 7. a plug rod; 8. a concave groove; 81. a first straight groove; 82. a second straight groove; 9. a Z-shaped groove; 10. a limiting plate; 11. a first limiting ring; 12. and a second limiting ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the headless deaerator disclosed by the invention comprises a hollow tank body 1, wherein two sides of the upper end of the hollow tank body 1 are respectively provided with a water inlet, the middle part of the lower end of the hollow tank body is provided with a water outlet, two sides of each water inlet are provided with air outlets, the middle part of the upper end of the hollow tank body 1 is provided with a recirculation interface and a four-extraction air supply interface, and the outer side of the four-extraction air supply interface is provided with an auxiliary steam supply interface and a high-pressure drainage interface; the manhole 2 has still been seted up respectively at the both ends of the 1 axis of the cavity jar body, and the safety door 3 of opening and close manhole 2 still articulates respectively at the cavity jar body 1 both ends, and four groups bolts are worn to be equipped with along its circumference to safety door 3, correspond on the cavity jar body 1 and have seted up four group's screw holes, through the screw-thread fit effect of bolt and screw hole, realize emergency exit 3's tight work.

The two sides of the hollow tank body 1 are respectively provided with an air inducing device 4 and an air blowing device 5, when the safety door 3 is opened, the air inducing device 4 and the air blowing device 5 are respectively communicated with the manholes 2 on the two sides, the air blowing device 5 conveys outside air into the hollow tank body 1, and the air inducing device 4 conveys the air in the hollow tank body 1 outwards to accelerate the air circulation speed inside and outside the hollow tank body 1.

Referring to fig. 1: the induced draft device 4 comprises an induced draft pipeline 42 and an induced draft fan 41, the induced draft fan 41 is communicated with an external power supply through an electric wire, one end of the induced draft pipeline 42 is fixedly communicated with an air inlet of the induced draft fan 41, the other end of the induced draft pipeline extends into one manhole 2, and a limiting device is arranged in the manhole 2; referring to fig. 2 and 3: the limiting device comprises a limiting frame 6 and four groups of insertion rods 7, and the insertion rods 7 are circumferentially arranged along the limiting frame 6 and are respectively fixed on the outer side of the limiting frame 6; four groups of concave grooves 8 which are respectively used for the insertion of the insertion rod 7 are correspondingly formed in the side wall of the manhole 2, and each concave groove 8 consists of two straight grooves I81 and one straight groove II 82; the first straight groove 81 is arranged in parallel with the axis of the manhole 2, one end of the first straight groove 81 is communicated with the outer wall of the hollow tank body 1, and the other first straight groove 81 is arranged in a closed mode along two ends of the axis of the manhole 2; the second straight groove 82 and the first straight groove 81 are vertically arranged and are communicated with the second straight groove 82; the widths of the first straight groove 81 and the second straight groove 82 are equal to the outer diameter of the insertion rod 7; the inserting rod 7 enters along the first straight groove 81 and slides through the second straight groove 82 to enter the first straight groove 81, so that the installation work of the limiting frame 6 and the manhole 2 is realized.

referring to fig. 2, the limiting frame 6 includes an outer ring 61, an inner ring 62 and connecting rods 63, the outer ring 61 and the inner ring 62 are concentrically arranged, two ends of the connecting rods 63 are respectively welded and fixed with the outer wall of the inner ring 62 and the inner wall of the outer ring 61, and four groups of the connecting rods 63 are uniformly arranged along the circumferential direction of the inner ring 62.

Referring to fig. 2 and 4, a first limit ring 11 is fixed on an outer wall of one end of the induced air duct 42, and an outer diameter of the first limit ring 11 is smaller than an inner diameter of the inner ring 62; four groups of limiting plates 10 are arranged at one end of the inner ring 62 facing the inside of the hollow tank body 1, the four groups of limiting plates 10 are respectively connected to the end face of the inner ring 62 in a rotating mode through rotating shafts, and when the limiting plates 10 are turned inwards, the distance between one end of each limiting plate 10 and the circle center of the inner ring 62 is smaller than the radius of the first limiting ring 11; therefore, after the first limiting ring 11 passes through the inner ring 62, one side of the first limiting ring 11 is abutted against the four groups of limiting plates 10, so that the air guide pipeline 42 is prevented from being separated from the inner ring 62; meanwhile, when the induced draft fan 41 (refer to fig. 1) works, outward displacement force is given to the induced draft pipeline 42, the first limiting ring 11 and the limiting plate 10 are always kept in butt joint, outward displacement force is given to the limiting frame 6, and the inserting rod 7 of the limiting frame 6 is stably limited in the corresponding first straight groove 81.

Referring to fig. 1 and 5, the blowing device 5 includes a blower 51 and a blowing pipe 52, the blower 51 is communicated with an external power supply through an electric wire, one end of the blowing pipe 52 is fixedly communicated with an air outlet of the blower 51, the other end of the blowing pipe extends into a manhole 2 on one side opposite to the air inducing pipe 42, a limiting frame 6 is arranged in the manhole 2, four groups of plug-in poles 7 are arranged on the outer wall of the limiting frame 6, and the plug-in poles 7 are uniformly arranged along the circumferential direction of the limiting frame 6; referring to fig. 6: four groups of Z-shaped grooves 9 are correspondingly formed in the side wall of the manhole 2, each Z-shaped groove 9 is composed of two straight grooves I81 and one straight groove II 82, the two straight grooves I81 are arranged in parallel with the axis of the manhole 2, one end of one straight groove I81 is communicated with one side of the outer wall of the hollow tank body 1, and the other straight groove I81 is formed towards one side in the hollow tank body 1 and is arranged in a closed mode towards one end in the hollow tank body 1; the second straight groove 82 is perpendicular to the first straight groove 81, and two ends of the second straight groove 82 are respectively communicated with one end of the second straight groove 82; the widths of the first straight groove 81 and the second straight groove 82 are equal to the outer diameter of the plug rod 7 (see fig. 5). Referring to fig. 5 and 6: when the limiting frame 6 is installed, the inserting rod 7 only needs to slide in from the opening end of the first straight groove 81, then rotate along the second straight groove 82 and finally enter the first straight groove 81.

Referring to fig. 5, the limiting frame 6 includes an outer ring 61, an inner ring 62 and connecting rods 63, the outer ring 61 and the inner ring 62 are concentrically arranged, two ends of the connecting rods 63 are respectively welded and fixed with the outer wall of the inner ring 62 and the inner wall of the outer ring 61, and four groups of the connecting rods 63 are uniformly arranged along the circumferential direction of the inner ring 62.

Referring to fig. 1 and 5, in the embodiment, the inner diameter of the inner ring 62 is the same as the outer diameter of the blast pipe 52, the outer wall of the blast pipe 52 is fixedly welded with the second limit ring 12, and the outer diameter of the second limit ring 12 is larger than the inner diameter of the inner ring 62, so that when one end of the blast pipe 52 is inserted into the inner ring 62, the second limit ring 12 abuts against one side of the inner ring 62, which is far away from the hollow tank body 1. When the blower 51 is started, the blower pipeline 52 is given a displacement force towards the inside of the hollow tank body 1, so that the second limit ring 12 keeps the abutting action with the inner ring 62, and then the limit frame 6 is given a displacement force towards the inside of the hollow tank body 1, and the limit frame 6 is stably limited in the manhole 2.

The implementation principle of the embodiment is as follows: when the deaerator needs to be overhauled, the deaerator is emptied, and then the safety doors 3 on the two sides are opened; then, the two limit frames 6 are respectively installed in the corresponding manholes 2, the blast pipeline 52 and the induced draft pipeline 42 are respectively inserted into the inner rings 62 of the corresponding limit frames 6, and then the induced draft fan 41 and the blower 51 are respectively started, so that the circulation of the outside air and the inside of the hollow tank body 1 is accelerated, and the cooling effect on the inside of the hollow tank body 1 is accelerated; when the temperature is reduced to normal temperature, one limiting frame 6 can be taken down, a worker enters the hollow tank body 1 from the manhole 2 to overhaul, and meanwhile, the induced draft fan 41 or the blower 51 continues to work, so that the stuffiness and heat of the worker in the hollow tank body 1 are reduced.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.