CN116287657A - Large-scale earthing tank sectional heat treatment device and process - Google Patents
Large-scale earthing tank sectional heat treatment device and process Download PDFInfo
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- CN116287657A CN116287657A CN202310089324.6A CN202310089324A CN116287657A CN 116287657 A CN116287657 A CN 116287657A CN 202310089324 A CN202310089324 A CN 202310089324A CN 116287657 A CN116287657 A CN 116287657A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 14
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- 230000002093 peripheral effect Effects 0.000 claims description 11
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- 229930195733 hydrocarbon Natural products 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
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Abstract
The application discloses large-scale earthing jar segmentation heat treatment device and technology, thereby the earthing jar divide into a plurality of barrel district section, barrel district section is put in and is removed the supporting seat, remove the supporting seat and remove on first track, make barrel district section enter into district heat treatment device in carry out holistic heat treatment operation, and make between barrel district be close to each other through removing the removal of supporting seat, and then carry out welding assembly operation, finally form a plurality of girth weld, through setting up the main heater, thereby make its support body remove on the second track carry out local heating to a plurality of final girth weld positions of earthing jar, namely the annealing treatment of heating region then refrigerated, thereby auxiliary heater carries out auxiliary heating to the heating girth weld both sides that heat affected zone simultaneously at auxiliary heater outside dish lays the heat preservation, thereby reduce the temperature difference of heating affected zone and heating region, with reduce the temperature gradient, thereby make the temperature gradient satisfy the rule requirement, and can not produce too big thermal stress.
Description
Technical Field
The application belongs to the technical field of welding forming of earthing tanks, and particularly relates to a heat treatment device and a heat treatment process of a large-scale earthing tank.
Background
The earthing type storage tank is a pressure container for storing liquefied hydrocarbon medium at normal temperature, wherein the storage tank consists of two spherical tank sealing heads and a straight section. The whole structure of the storage tank is slender, is similar to a bullet, is commonly known as a bullet tank, is buried under soil and gravel, can effectively avoid damage to the storage tank by external forces such as surrounding heat sources, explosion shock waves, mechanical hammering and the like, has higher safety advantage compared with a container exposed on land, and is a preferable pressure container for storing inflammable and explosive media such as liquefied hydrocarbon and the like.
In order to prevent the liquefied petroleum gas container from generating micro cracks in use, it is effective to use an automatic welding and post-welding annealing heat treatment, and in order to improve the storage capacity of the cylinder, the container is further developed to be large-sized. At the same time, the problem arises that all welds cannot be annealed simultaneously, and thus a method of stepwise heat-treating the welds of the vessel in sections has emerged. In this annealing method, the circumferential weld of the cylindrical pressure vessel is locally heated, so that the temperature gradient in the axial direction should be controlled so that the vessel axial direction does not generate excessive thermal stress due to the temperature gradient. The prior art method for reducing the temperature gradient is to use a heat insulating material such as ceramic fiber to be laid on both sides of the weld joint, but still generates a temperature gradient beyond the specification, and the earthing tank is mounted on the fixing bracket, and the axial deformation of the earthing tank is limited when the earthing tank is heated, so that the tank body is easily deformed, and thus, the prior art needs to be further improved and improved.
Disclosure of Invention
The invention provides a sectional heat treatment device and a sectional heat treatment process for a large-scale earthing tank, which aim to solve at least one of the technical problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: a large-scale earthing tank subsection heat treatment apparatus comprising:
a section heat treatment device for integrally heat-treating a cylinder section divided into a plurality of sections;
the local heat treatment device is used for heat treatment of a final annular welding seam of the earth covering tank of the welding assembly and comprises a main heater and an auxiliary heater;
the main heater comprises a frame body and an arc-shaped heating assembly, the arc-shaped heating assembly comprises a heating component and an arc-shaped hollow frame body, the heating component is arranged in the arc-shaped hollow frame body, the arc-shaped hollow frame body is connected with the frame body through a translation mechanism, the translation mechanism acts to enable the opposite arc-shaped heating assembly to be close to and cling to the peripheral wall of the earthing tank, a heat medium space is formed between the arc-shaped hollow frame body and the peripheral wall of the earthing tank, and the annular welding seam is arranged in the heat medium space;
the auxiliary heater is used for heating two sides of the circular weld joint and is externally paved with a heat preservation layer so as to reduce the axial temperature gradient of the earthing tank;
the support structure comprises a first track laid on the ground in two parallel ways, a second track laid on the ground in two parallel ways and a plurality of movable support seats arranged on the first track, wherein the movable support seats can drive the cylinder section to enter the section heat treatment device; the frame body is connected with the second track, the main heater can move on the second track to heat annular welding seams at different positions of the earthing tank, and the movable supporting seat moves on the first track when the earthing tank is heated or cooled so that the earthing tank can freely stretch out and draw back.
According to the structure, the hoisting machine is used for placing the barrel sections formed by welding the front-stage barrel sections with the barrel sections and the barrel sections with the seal heads in the movable supporting seat, the movable supporting seat moves on the first track, the barrel sections enter the section heat treatment device to carry out integral heat treatment operation, after all barrel sections are subjected to sectional heat treatment, the barrel sections move out of the section heat treatment device, the barrel sections are mutually close to each other through movement of the movable supporting seat, welding assembly operation is carried out, a plurality of annular welding seams are finally formed, the frame body of the main heater is moved on the second track, and therefore the final annular welding seam positions of the earthing tank, namely the heating areas, are locally heated and then cooled, and meanwhile, the auxiliary heater carries out auxiliary heating treatment on two sides of the heating annular welding seam, namely the heat affected areas, and simultaneously lays a heat preservation layer on the outer side of the auxiliary heater.
Meanwhile, when the earthing tank is heated and cooled, the earthing tank can stretch or shrink according to the heat expansion and cold contraction principle, the movable supporting seat is arranged on two sides of the heating end, the movable supporting seat on one side is fixed, and when the earthing tank stretches or contracts, the movable supporting seat on the other side can move on the first track, so that the axial deformation of the earthing tank is not limited, and the tank body is protected.
In a preferred implementation mode, a fan is arranged at the top of the frame body, and the translation mechanism acts to drive the arc-shaped heating component to move, so that the fan is sealed in the heating medium space.
Through setting up the fan in the heat medium space, the fan work makes the hot air flow in the heat medium space, makes the hot gas flow contact the outer peripheral face of girth weld to improve heating efficiency.
In a preferred implementation manner, the heating component comprises a heating resistance wire, a thermocouple is arranged in the arc-shaped hollow frame body to detect the temperature of the heating medium space, the thermocouple is electrically connected with a controller, the thermocouple transmits a measured temperature signal to the controller, and the controller controls the input voltage of the heating resistance wire.
The heating resistance wire can produce convection heat, and convection heating can utilize the fan to blow air through the heating resistance wire in order to improve heating efficiency, thereby can detect the temperature in heat medium space through setting up the thermocouple in the inside of arc cavity support body, and thermocouple connection controller gives the controller with the temperature signal who detects, thereby the controller is convenient for control the temperature in heat medium space according to the input voltage of temperature signal control heating resistance wire.
In the preferred implementation mode, auxiliary heater includes cold liquid box, flexible heating spare, serpentine honeycomb duct of having arranged in the flexible heating spare, the both ends of honeycomb duct all communicate the cold liquid box, the heat medium space is equipped with the gas vent, the gas vent passes through the heat medium pipeline with the steam is arranged into the inside liquid of cold liquid box internal heating, be equipped with the pump body in the cold liquid box, the pump body is sent into the liquid after the heating the honeycomb duct.
The hot air in the heat medium space flows through the fan, the hot air is discharged through the air outlet, the hot air is discharged into the cold liquid box body of the auxiliary heater through the heat medium pipeline connected with the air outlet to heat the cold liquid such as water in the inner part, when the heat pump is used, the flexible heating part is wound around two sides of the annular welding seam, then the outer side of the flexible heating part is covered with a heat preservation layer, two ends of the guide pipe are communicated with the cold liquid box body, the pump body in the cold liquid box body sends heated liquid into the guide pipe arranged in a snake-shaped manner in the flexible heating part to heat the heat affected zone, so that the temperature difference between the heat affected zone and the heating zone is reduced, and the temperature gradient is reduced.
In a preferred implementation mode, the cold liquid box body is provided with a water inlet and a water outlet, the water inlet and the water outlet are provided with electromagnetic valves, a temperature sensor is arranged in the cold liquid box body and is used for measuring the temperature of liquid in the cold liquid box body and transmitting signals to a control end, and the control end controls the opening and closing of the electromagnetic valves.
The temperature sensor in the cold liquid box detects the liquid temperature change in the cold liquid box, so that the electromagnetic valve is opened or closed according to the temperature change, the liquid temperature in the cold liquid box can be kept in a proper range, the heating temperature of the auxiliary heater is adjusted, the temperature at two sides of the annular welding seam can be kept in a certain reasonable range with the temperature difference value of the annular welding seam area, and the temperature gradient is controlled to be changed severely.
In a preferred implementation, the zone heat treatment device is a heating furnace, the heating furnace comprises an inlet and an outlet, the inlet and the outlet are both provided with lifting doors, and the first rail passes through the heating furnace.
The heating furnace is current heating furnace principle, and its inside evenly sets up heating element like thermal resistance silk, and the lift door of setting can be for rolling slats door, or other forms lift door structures, and main aim at seals the heating furnace, reduces the heat loss in the stove, and first track enters into the heating furnace through the heating furnace when moving the supporting seat and driving barrel district section and remove, and structural design is more reasonable.
In a preferred implementation, the rain-proof member further comprises a moving frame and a folding rain-proof cloth, wherein the moving frame is arranged on the second track, and the folding rain-proof cloth is connected with the moving frame.
The final welding seam annealing stage of the earthing tank is generally carried out outdoors, so that the temperature change of a heating area and a heating influence area of the earthing tank is influenced by rainfall and wind-up during heat treatment is considered, a rain-proof piece is designed, a movable frame of the rain-proof piece is connected with a folding rain-proof cloth, and the movable frame is arranged on a second track and can move on the second track, so that the folding storage and unfolding shielding work of the folding rain-proof cloth is realized.
In a preferred implementation manner, the movable supporting seat comprises an arc-shaped supporting frame body, the bottom of the arc-shaped supporting frame body is connected with a rolling roller, the rolling roller is connected with a driving motor through a driving shaft, and the driving motor works to enable the rolling roller to move along the first track; the movable supporting seat is provided with a fixing portion, the fixing portion is provided with a fixing hole, the side wall of the first track is provided with a plurality of matching holes, and fixing bolts penetrate through the fixing holes and the matching holes to limit movement of the movable supporting seat.
The arc-shaped support frame body of the movable support seat is matched with the shell of the earthing tank, the movable support seat drives the driving shaft to move on the first track through the driving motor, the structural design is reasonable, the fixed portion is arranged on the movable support seat through the plurality of matching holes, the bolt penetrates through the fixed hole and the matching hole on the fixed portion, accordingly, the movable support seat is fixed, the operation is simple, and the earthing tank is supported more stably.
In a preferred implementation, the thermal insulation layer is an aluminum silicate fiber needled blanket.
In a preferred implementation, an annealing process using a heat treatment apparatus includes the steps of:
s1: two sections of seal head cylinders and a plurality of sections of middle cylinder section cylinders are sequentially arranged on the movable supporting seat by using a portal crane or a crawler crane according to the sequence of the seal head cylinders, the plurality of cylinder section cylinders and the seal head cylinders;
s2: starting a driving motor of the movable supporting seat to enable the movable supporting seat to move on a first track, and enabling the end socket cylinder body and a plurality of middle cylinder section cylinders to sequentially enter a section heat treatment device for sectional heat treatment;
s3: after all the barrel sections finish furnace heat treatment and move out of the section heating furnace, final welding assembly is carried out to form a plurality of final annular welding seams, the movable supporting seat on one side of the annular welding seams is fixed, the frame body of the main heater moves on the second track, and the arc-shaped heating assembly of the main heater is just used for treating the annular welding seams;
s4: starting the translation mechanism to enable two opposite arc-shaped hollow frame bodies of the main heater to be close to and attached to the outer peripheral wall of the earthing tank, and communicating the heating medium space with the cold liquid tank body through the heating medium pipeline;
s5: wrapping the flexible heating parts of the auxiliary heater on two sides of the circular weld joint, communicating two ends of the flow guide pipe in the flexible heating parts with the cold liquid box body, wrapping the heat preservation layer on the flexible heating parts, starting the main heater to heat the heating parts of the main heater, and starting the fan to generate flowing hot air flow in the heat medium space;
s6: according to temperature signals measured by the thermocouple and the temperature sensor, adjusting the temperature of the heating medium space and the heating temperature at two sides of the annular welding seam to keep the temperature suitable, and slowly cooling after heating for a period of time to finish the heat treatment of the annular welding seam;
s7: and performing heat treatment operation on the annular welding seam at the rest position according to the steps S3-S6.
The structure has the following beneficial effects:
1. the main heater moves on the second track to locally heat and then cool the final multiple annular welding seam positions of the earthing tank, namely the heating areas, and meanwhile, the auxiliary heater carries out auxiliary heating treatment on two sides of the heating annular welding seam, namely the heat affected zone, and meanwhile, an insulating layer is paved on the outer side disc of the auxiliary heater, so that the temperature difference between the main heater and the heating areas is reduced, the temperature gradient meets the requirements specified by the specifications, and excessive thermal stress cannot be generated due to the temperature gradient.
2. The fan and the thermal resistance wire inside the main heater are matched to accelerate the air flow in the heating medium space, so that the heating efficiency is improved, the heat of the auxiliary heater is derived from the main heater, the heat energy is fully utilized, the effects of energy conservation and emission reduction are achieved, the temperature is detected through the thermocouple and the temperature sensor, the heating temperature of the main heater and the heating temperature of the auxiliary heater are conveniently controlled, and the heat treatment quality of the earthing tank is improved.
3. The movable supporting seats are arranged on two sides of the annular welding seam, one movable supporting seat is fixed, and when the earthing tank is heated to stretch or shrink, the unfixed movable supporting seat moves on the first track, so that the axial deformation of the earthing tank is not limited, and the tank body is protected.
4. The first track and the second track reduce the number of times that earthing jar hoist and mount moved, only need hoist and mount once through the heat treatment process that the heat treatment device that this application set up carried out, improved heat treatment efficiency.
5. Design flashing member for when outdoor heat treatment, to the regional shielding of heat treatment, prevent that heat treatment regional temperature from receiving the influence of weather, the folding rain-proof cloth of removal frame connection of flashing member removes the frame setting at the second track and can remove at the second track to realize folding storage and the expansion of folding rain-proof cloth and shelter from work.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the present application and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic structural view of one illustrative embodiment of a zone heat treatment apparatus of the present application;
FIG. 2 is a schematic structural view of an exemplary embodiment of a localized heat treatment apparatus of the present application;
FIG. 3 is a schematic structural diagram of an exemplary embodiment of a heating medium space of the present application;
fig. 4 is a schematic structural view of an exemplary embodiment of the flexible heating element of the present application.
Description of the reference numerals:
1. a zone heat treatment device; 10. a heating furnace; 11. an inlet; 12. an outlet; 13. a lifting door;
2. a local heat treatment device; 20. a main heater; 200. a frame body; 2000. a blower; 2001. a translation mechanism; 201. an arc heating assembly; 2010. a heating member; 2011. an arc-shaped hollow frame body; 20110. a heating medium space; 20111. an exhaust port; 20222. a heating medium pipe; 21. an auxiliary heater; 210. a cold liquid tank; 2100. a water inlet; 2101. a water outlet; 211. a flexible heating element; 2110. a flow guiding pipe; 212. a pump body; 213. a heat preservation layer; 22. a thermocouple; 23. a temperature sensor; 24. an electromagnetic valve;
3. a support structure; 30. a first track; 300. a mating hole; 31. a second track; 32. moving the supporting seat; 320. an arc-shaped support frame body; 3200. a fixing part; 3201. a fixing hole; 321. a rolling roller; 322. a driving motor; 323. a drive shaft;
4. a rain shield; 40. a moving rack; 41. folding the rain-proof cloth;
5. a soil covering tank; 50. a barrel section; 51. and (5) annular welding seams.
Detailed Description
In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than as described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The description as it relates to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
As shown in fig. 1 to 4, the present invention provides a large-scale earthing tank segment heat treatment apparatus comprising:
a section heat treatment apparatus 1, the section heat treatment apparatus 1 being for integrally heat-treating a cylinder section 50 divided into a plurality of sections;
a local heat treatment device 2, wherein the local heat treatment device 2 is used for heat treatment of a final annular welding seam 51 of the earth covering tank 5 welded with the assembly, and the local heat treatment device 2 comprises a main heater 20 and an auxiliary heater 21;
the main heater 20 comprises a frame body 200 and an arc heating assembly 201, the arc heating assembly 201 comprises a heating component 2010 and an arc hollow frame body 2011, the heating component 2010 is arranged in the arc hollow frame body 2011, the arc hollow frame body 2011 is connected with the frame body 200 through a translation mechanism 2001, the translation mechanism 2001 acts to enable the opposite arc heating assembly 201 to be close to and cling to the peripheral wall of the earthing tank 5, a heat medium space 20110 is formed between the arc hollow frame body 2011 and the peripheral wall of the earthing tank 5, and the annular welding seam 51 is arranged in the heat medium space 20110;
the auxiliary heater 21 is used for heating both sides of the girth weld 51 and is externally paved with a heat preservation layer 213 to reduce the temperature gradient of the earthing tank 5 in the axial direction;
the support structure 3, the support structure 3 includes a first track 30 laid on the ground in two parallel, a second track 31 in two parallel, and a plurality of movable support seats 32 arranged on the first track 30, the movable support seats 32 can drive the cylinder section 50 to enter the section heat treatment device 1; the frame 200 is connected with the second rail 31, the main heater 20 can move to heat the annular welding seams 51 at different positions of the earthing tank 5 when the second rail 31 is used for heating, and the movable supporting seat 32 moves to enable the earthing tank 5 to freely stretch and retract when the first rail 30 is used for moving when the earthing tank 5 is heated or cooled.
According to the structure, the barrel section 50 formed by welding the earlier stage barrel section and the end socket is placed on the movable supporting seat 32 by using the hoisting machine, the barrel section 50 is placed on the movable supporting seat 32 according to the final welding sequence, the movable supporting seat 32 moves on the first track 30, the barrel section 50 enters the section heat treatment device 1 to carry out integral heat treatment operation, and the barrel section 50 can be heated uniformly, meanwhile, the temperature rising and reducing speed is easy to control, the effect is good, the barrel section 50 is short, weight and convenient to move, and furthermore, the length of the earthing tank 5 is greatly reduced, so that a plurality of section heat treatment devices 1 adapting the length of the barrel section 50 can be arranged, and the integral heat treatment operation of a plurality of barrel sections 50 is carried out simultaneously, thereby improving the heat treatment efficiency.
After the sectional heat treatment of all the barrel sections 50 is completed, the barrel sections 50 are moved out of the section heat treatment device 1, the barrel sections 50 are mutually close to each other through the movement of the movable supporting seat 32, and then a plurality of annular welding seams 51 are finally formed, in the drawing, the whole of the earthing tank 5 is slender and heavy, the movement transfer is inconvenient, and the whole heat treatment is not performed, therefore, through the arrangement of the main heater 20, the frame body 200 moves on the second track 31, so that the final plurality of annular welding seams 51 of the earthing tank 5, namely the heating area, is subjected to the local heating and then the cooling annealing treatment, meanwhile, the auxiliary heater 21 performs the auxiliary heating treatment on the two sides of the heating annular welding seams 51, namely the heat affected zone, and simultaneously, the heat preservation layer 213 is paved on the outer side of the auxiliary heater 21 in a disc mode.
Meanwhile, when the earthing tank 5 is heated and cooled, the extension or contraction phenomenon exists according to the principle of thermal expansion and contraction, the movable supporting seat 32 is arranged on two sides of the heating end, the movable supporting seat 32 on one side is fixed, and when the earthing tank 5 is extended or contracted, the movable supporting seat 32 on the other side can move on the first track 30, so that the axial deformation of the earthing tank 5 is not limited, and the tank body is protected.
The connection between the frame 200 of the main heater 20 and the second rail and between the movable support 32 and the first rail are conventional, such as connection between a train and a rail, and movement of a portal frame, etc., so the drawings are not drawn in detail, and those skilled in the art will understand.
As a first preferred embodiment of the present application, the top of the frame 200 is provided with a blower 2000, and the translational mechanism 2001 acts to drive the arc heating assembly 201 to move, so that the blower 2000 is enclosed in the heating medium space 20110.
By providing the blower 2000 in the heat medium space 20110, the blower 2000 operates to flow the hot air in the heat medium space 20110, and to flow the hot air to contact the outer circumferential surface of the girth weld 51, thereby improving the heating efficiency.
As a second preferred embodiment of the present application, the heating part 2010 includes a heating resistance wire, and a thermocouple 22 is provided inside the arc-shaped hollow frame 2011 to detect the temperature of the heating medium space 20110, and the thermocouple 22 is electrically connected to a controller, and the thermocouple 22 transmits a measured temperature signal to the controller, and the controller controls the input voltage of the heating resistance wire.
Heating the resistive wire generates convective heat which heats the surrounding air or radiant heat, directly heating other objects by an infrared radiation phenomenon. The convection heating can utilize the fan to blow air through the heating resistance wire so as to improve heating efficiency, thereby can detect the temperature in heating medium space 20110 through setting up thermocouple 22 in the inside of arc cavity support 2011, thermocouple 22's constitution is simpler, the procedure of its operation and installation is uncomplicated, thermocouple 22 is more convenient and thermocouple 22 is high temperature resistant when the problem about to change, because to respond to the temperature under each environment, thermocouple 22's temperature bearing range is bigger, even reach 2000 degrees, simultaneously thermocouple 22's durability is better, so its life-span is longer, can save a lot of cost, thermocouple 22 connection director gives the controller with the temperature signal who detects, thereby the input voltage of controller according to temperature signal control heating resistance wire is convenient for control the temperature in heating medium space 20110, this application director does not show in the figure, its electric connection relation with thermocouple 22 is prior art, it can be understood by skilled in the art.
As a third preferred embodiment of the present application, the auxiliary heater 21 includes a cold liquid tank 210, a flexible heating element 211, a flow guiding tube 2110 is arranged in the flexible heating element 211 in a serpentine manner, two ends of the flow guiding tube 2110 are both communicated with the cold liquid tank 210, a heat medium space 20110 is provided with an exhaust port 20111, the exhaust port 20111 discharges hot gas into the cold liquid tank 210 to heat internal liquid through a heat medium pipe 20222, a pump body 212 is arranged in the cold liquid tank 210, and the pump body 212 sends the heated liquid into the flow guiding tube 2110.
The arc cavity support 2011 upper portion is equipped with the semicircle opening, the bottom is equipped with the semicircle, relative arc cavity support 2011 is close to each other and in close contact, can set up seal structure at relative arc cavity support 2011, if set up the recess at an arc cavity support 2011, set up high temperature resistant sealing washer in the recess, set up with recess complex arch at another arc cavity support 2011, after the cooperation behind the contact of two relative arc cavity supports 2011, the bottom forms gas vent 20111, the top forms the air inlet, and fan 2000's pivot sets up in the air inlet, the air can enter into heat medium space 20110 by the clearance between pivot and the air inlet, again by the exhaust 20111 discharge, can set firmly heat preservation 213 such as ceramic layer in the arc cavity support 2011 outside, prevent heat loss.
As a preferred example of this embodiment, the cold liquid tank 210 is provided with a water inlet 2100 and a water outlet 2101, the water inlet 2100 and the water outlet 2101 are provided with electromagnetic valves 24, a temperature sensor 23 is arranged in the cold liquid tank 210, the temperature sensor 23 is used for measuring the temperature of the liquid in the cold liquid tank 210 and transmitting signals to a control end, and the control end controls the opening and closing of the electromagnetic valves 24.
The temperature sensor 23 in the cold liquid box 210 detects the temperature change of the liquid in the cold liquid box 210, so that the electromagnetic valve 24 is opened or the electromagnetic valve 24 is closed according to the temperature change, the temperature of the liquid in the cold liquid box 210 can be kept in a proper range, and the heating temperature of the auxiliary heater 21 is adjusted, so that the temperature at two sides of the annular welding seam 51 can be kept in a certain reasonable range with the temperature difference value of the annular welding seam 51 area, and the temperature gradient can not be changed severely.
As a fourth preferred embodiment of the present application, the zone heat treatment apparatus 1 is a heating furnace 10, the heating furnace 10 includes an inlet 11 and an outlet 12, the inlet 11 and the outlet 12 are each provided with a lifting door 13, and the first rail 30 passes through the heating furnace 10.
The heating furnace 10 is based on the existing heating furnace 10 principle, heating elements such as heat resistance wires are uniformly arranged in the heating furnace 10, the arranged lifting door 13 can be a roller shutter door or other lifting door 13 structures, the main purpose is to seal the heating furnace 10, reduce heat loss in the furnace, the first track 30 passes through the heating furnace 10, and the moving support seat 32 drives the barrel section 50 to move and enter the heating furnace 10, so that the structural design is more reasonable.
As a fifth preferred embodiment of the present application, the rain shield 4 is further included, the rain shield 4 includes a moving frame 40 and a folding rain fly 41, the moving frame 40 is disposed on the second rail 31, and the folding rain fly 41 is connected to the moving frame 40.
The final welding seam annealing stage of the earthing tank 5 is generally performed outdoors, so that the rainproof member 4 is designed in consideration of temperature changes of sudden weather such as rainfall and wind-up during heat treatment, which affect the heating area and the heating affecting area of the earthing tank 5, the movable frame 40 of the rainproof member 4 is connected with the folding rain cloth 41, and the movable frame 40 is arranged on the second rail 31 and can move on the second rail 31, so that folding storage and unfolding shielding work of the folding rain cloth 41 are realized.
As a sixth preferred embodiment of the present application, the movable supporting base 32 includes an arc-shaped supporting frame 320, the bottom of the arc-shaped supporting frame 320 is connected with a rolling roller 321, the rolling roller 321 is connected with a driving motor 322 through a driving shaft 323, and the driving motor 322 operates to move the rolling roller 321 along the first track 30; the moving support 32 is provided with a fixing portion 3200, the fixing portion 3200 is provided with a fixing hole 3201, the side wall of the first rail 30 is provided with a plurality of fitting holes 300, and fixing bolts penetrate through the fixing hole 3201 and the fitting holes 300 to limit movement of the moving support 32.
The arc-shaped support frame 320 of the movable support seat 32 is matched with the shell of the earthing tank 5, the movable support seat 32 drives the driving shaft 323 to move on the first track 30 through the driving motor 322, the structural design is reasonable, the fixed portion 3200 is arranged on the movable support seat 32 through the plurality of matching holes 300 arranged on the first track 30, bolts penetrate through the fixed holes 3201 and the matching holes 300 on the fixed portion 3200, accordingly, the movable support seat 32 is fixed, the operation is simple, and the earthing tank 5 is supported stably.
As a seventh preferred embodiment of the present application, insulation 213 is an aluminum silicate fiber needled blanket.
When the aluminum silicate needled blanket is used for a long time in neutral and oxidizing atmosphere, the aluminum silicate needled blanket can still keep good tensile strength, toughness and fiber structure. The temperature resistance is 950-1400 ℃. The heat-absorbing material has the advantages of chemical stability, heat stability, sound absorption and noise reduction performance, high tensile strength, low heat conductivity and low heat capacity.
As an annealing process using the heat treatment apparatus of the present application, the following steps are included:
s1: two sections of seal head cylinders and a plurality of sections of middle cylinder section cylinders of the cylinder section 50 are sequentially arranged on the movable supporting seat 32 by using a portal crane or a crawler crane according to the sequence of the seal head cylinders, the plurality of cylinder section cylinders and the seal head cylinders;
s2: starting a driving motor 322 of the movable supporting seat 32 to enable the movable supporting seat 32 to move on the first track 30, so that the end socket cylinder body and a plurality of middle cylinder section cylinders sequentially enter the section heat treatment device 1 for sectional heat treatment;
s3: after the whole barrel section 50 completes the heat treatment in the furnace and moves out of the section heating furnace 10, final welding assembly is carried out to form a plurality of final annular welding seams 51, and the movable supporting seat 32 on one side of the annular welding seams 51 is fixed, so that the frame body of the main heater 20 moves on the second track 31, and the arc-shaped heating assembly 201 of the main heater 20 is opposite to the annular welding seams 51 to be treated;
s4: starting the translation mechanism 2001, enabling two opposite arc-shaped hollow frame bodies 2011 of the main heater 20 to be close to and attached to the outer peripheral wall of the earthing tank 5, and communicating the heat medium space 20110 with the cold liquid tank 210 through a heat medium pipeline 20222;
s5: wrapping the flexible heating element 211 of the auxiliary heater 21 on two sides of the circular weld joint 51, communicating two ends of the guide pipe 2110 in the flexible heating element 211 with the cold liquid box 210, wrapping the heat preservation layer 213 on the flexible heating element 211, starting the main heater 20 to heat the heating element 2010 of the main heater 20, and starting the fan 2000 to generate flowing hot air flow in the heat medium space 20110;
s6: according to the temperature signals measured by the thermocouple 22 and the temperature sensor 23, the temperature of the heating medium space 20110 and the heating temperature at the two sides of the annular welding seam 51 are adjusted to be suitable, and the annular welding seam 51 is slowly cooled after being heated for a period of time, so that the heat treatment of the annular welding seam 51 is completed;
s7: the heat treatment operation is performed on the girth welds 51 at the remaining positions according to the steps S3 to S6.
In the practical use process, the first track 30 and the second track 31 are pre-built, a proper interval distance is kept between the movable supporting seats 32 according to the length of the barrel section 50 after the soil covering tank 5 is segmented, generally, two movable supporting seats 32 support one barrel section 50, corresponding adjustment design such as 8 segments can be carried out according to the whole length of the soil covering tank 5, the segmented barrel section 50 can be matched with the length of the section heat treatment device 1, the rain protection piece 4 and the main heater 20 are firstly moved to the placement position of the soil covering tank 5 after the welding assembly is not hindered, the movable supporting seat 32 on one side of the annular welding seam 51 is firstly fixed when the annular welding seam 51 is locally heat treated, the translation mechanism 2001 is started to enable the arc-shaped heating assemblies 201 to be close to the peripheral wall of the soil covering tank 5, the auxiliary heater 21 is wound on two sides of the annular welding seam 51 and wraps the heat preservation layer 213, the guide pipe 2110 is connected with the cold liquid box 210, the cold liquid box 210 is communicated with the exhaust port 20111 through the heat medium pipeline 20222, the heating component 2010 of the arc heating component 201 heats the heat medium space 20110 slowly, the heat treatment operation of the annular welding seam 51 at the final stage of the sectional heat treatment earthing tank 5 can be completed by slow cooling at a proper speed after enough time, meanwhile, as an extended technical scheme, for earthing tanks with different thickness, the arc-shaped supporting frame bodies of the movable supporting seat 32 can be designed and installed detachably, the arc-shaped supporting frame bodies with corresponding radians are convenient to replace, the arc-shaped heating components with corresponding radians of earthing tanks with different thickness are arranged on the second track, namely, the plurality of frame bodies 200 can move on the second track, a fixed heat treatment occasion is designed, after the earthing tank heat treatment is completed and the subsequent manhole opening and other procedures are completed, the whole tank body is transported to a target place.
The invention can be realized by adopting or referring to the prior art at the places which are not described in the invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.
Claims (10)
1. A large-scale earthing tank segmentation heat treatment apparatus, characterized by comprising:
a section heat treatment device for integrally heat-treating a cylinder section divided into a plurality of sections;
the local heat treatment device is used for heat treatment of a final annular welding seam of the earth covering tank of the welding assembly and comprises a main heater and an auxiliary heater;
the main heater comprises a frame body and an arc-shaped heating assembly, the arc-shaped heating assembly comprises a heating component and an arc-shaped hollow frame body, the heating component is arranged in the arc-shaped hollow frame body, the arc-shaped hollow frame body is connected with the frame body through a translation mechanism, the translation mechanism acts to enable the opposite arc-shaped heating assembly to be close to and cling to the peripheral wall of the earthing tank, a heat medium space is formed between the arc-shaped hollow frame body and the peripheral wall of the earthing tank, and the annular welding seam is arranged in the heat medium space;
the auxiliary heater is used for heating two sides of the circular weld joint and is externally paved with a heat preservation layer so as to reduce the axial temperature gradient of the earthing tank;
the support structure comprises a first track laid on the ground in two parallel ways, a second track laid on the ground in two parallel ways and a plurality of movable support seats arranged on the first track, wherein the movable support seats can drive the cylinder section to enter the section heat treatment device; the frame body is connected with the second track, the main heater can move on the second track to heat annular welding seams at different positions of the earthing tank, and the movable supporting seat moves on the first track when the earthing tank is heated or cooled so that the earthing tank can freely stretch out and draw back.
2. The segmented heat treatment device for the large-scale earthing tank according to claim 1, wherein a fan is arranged at the top of the frame body, and the translation mechanism acts to drive the arc-shaped heating assembly to move so that the fan is sealed in the heating medium space.
3. The segmented heat treatment device for the large-scale earthing tank according to claim 1, wherein the heating component comprises a heating resistance wire, a thermocouple is arranged in the arc-shaped hollow frame body to detect the temperature of the heating medium space, the thermocouple is electrically connected with a controller, the thermocouple transmits a detected temperature signal to the controller, and the controller controls the input voltage of the heating resistance wire.
4. The large-scale earthing tank segmentation heat treatment apparatus according to claim 1, wherein the auxiliary heater comprises a cold liquid box body and a flexible heating part, a flow guide pipe is arranged in the flexible heating part in a serpentine manner, two ends of the flow guide pipe are both communicated with the cold liquid box body, a heat medium space is provided with an exhaust port, the exhaust port is used for discharging hot gas into the cold liquid box body through a heat medium pipeline to heat internal liquid, a pump body is arranged in the cold liquid box body, and the pump body is used for feeding the heated liquid into the flow guide pipe.
5. The sectional heat treatment device for the large-scale soil covering tank, as claimed in claim 4, wherein the cold liquid tank body is provided with a water inlet and a water outlet, the water inlet and the water outlet are provided with electromagnetic valves, a temperature sensor is arranged in the cold liquid tank body, the temperature sensor is used for measuring the temperature of liquid in the cold liquid tank body and transmitting signals to a control end, and the control end controls the opening and closing of the electromagnetic valves.
6. A large scale earthing tank subsection heat treatment apparatus as set forth in claim 1 wherein said section heat treatment apparatus is a heating furnace comprising an inlet and an outlet, both of which are provided with lifting doors, said first rail passing through said heating furnace.
7. The large scale earthing tank subsection heat treatment apparatus of claim 1 further comprising a rain shield comprising a moving frame and a folding rain cloth, the moving frame being disposed on the second rail, the folding rain cloth being connected to the moving frame.
8. The segmented heat treatment device for a large-scale earthing tank according to claim 1, wherein the movable supporting seat comprises an arc-shaped supporting frame body, the bottom of the arc-shaped supporting frame body is connected with a rolling roller, the rolling roller is connected with a driving motor through a driving shaft, and the driving motor works to enable the rolling roller to move along the first track; the movable supporting seat is provided with a fixing portion, the fixing portion is provided with a fixing hole, the side wall of the first track is provided with a plurality of matching holes, and fixing bolts penetrate through the fixing holes and the matching holes to limit movement of the movable supporting seat.
9. The segmented heat treatment device for a large-scale earthing tank according to claim 1, wherein the heat-insulating layer is an aluminum silicate fiber needled blanket.
10. An annealing process based on the heat treatment apparatus according to any one of claims 1 to 9, characterized by comprising the steps of:
s1: two sections of seal head cylinders and a plurality of sections of middle cylinder section cylinders are sequentially arranged on the movable supporting seat by using a portal crane or a crawler crane according to the sequence of the seal head cylinders, the plurality of cylinder section cylinders and the seal head cylinders;
s2: starting a driving motor of the movable supporting seat to enable the movable supporting seat to move on a first track, and enabling the end socket cylinder body and a plurality of middle cylinder section cylinders to sequentially enter a section heat treatment device for sectional heat treatment;
s3: after all the barrel sections finish furnace heat treatment and move out of the section heating furnace, final welding assembly is carried out to form a plurality of final annular welding seams, the movable supporting seat on one side of the annular welding seams is fixed, the frame body of the main heater moves on the second track, and the arc-shaped heating assembly of the main heater is just used for treating the annular welding seams;
s4: starting the translation mechanism to enable two opposite arc-shaped hollow frame bodies of the main heater to be close to and attached to the outer peripheral wall of the earthing tank, and communicating the heating medium space with the cold liquid tank body through the heating medium pipeline;
s5: wrapping the flexible heating parts of the auxiliary heater on two sides of the circular weld joint, communicating two ends of the flow guide pipe in the flexible heating parts with the cold liquid box body, wrapping the heat preservation layer on the flexible heating parts, starting the main heater to heat the heating parts of the main heater, and starting the fan to generate flowing hot air flow in the heat medium space;
s6: according to temperature signals measured by the thermocouple and the temperature sensor, adjusting the temperature of the heating medium space and the heating temperature at two sides of the annular welding seam to keep the temperature suitable, and slowly cooling after heating for a period of time to finish the heat treatment of the annular welding seam;
s7: and performing heat treatment operation on the annular welding seam at the rest position according to the steps S3-S6.
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| CN202310089324.6A CN116287657B (en) | 2023-02-03 | 2023-02-03 | Large-scale earthing tank sectional heat treatment device and process |
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| CN202310089324.6A CN116287657B (en) | 2023-02-03 | 2023-02-03 | Large-scale earthing tank sectional heat treatment device and process |
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