High temperature annealing furnace double-position car's diffusion tube system and its using method

Abstract

The application discloses a kind of high-temperature annealing furnace double-coil position trolley's diffusion pipe system, including refractory platform body, car body, cylinder cover and pipeline structure, pipeline structure includes flat pipe, cover inner diffusion pipe group, furnace waste gas treatment pipe and furnace outer diffusion pipe group, flat pipe is installed in the bottom of car body, flat pipe middle is provided with valve, and flat pipe is divided into two end sections, two end sections are extended to the below of two load-bearing brick groups corresponding to bearing base respectively, cover inner diffusion pipe group is two groups, is connected on two end sections respectively, furnace waste gas treatment pipe includes lead pipe body and discharge pipe body, lead pipe body two ends are connected to two end sections respectively, discharge pipe body is connected on lead pipe body, and is worn to furnace chamber, for waste gas discharge to furnace chamber combustion, furnace outer diffusion pipe group is installed at the end of two end sections of flat pipe respectively, for igniting waste gas, detecting pressure and detecting gas component content in pipe. Diffusion pipe system of the application is easy to clean pipeline dust sand, protect pipeline and ball valve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high-temperature annealing furnace, and relates to a silicon steel production device, in particular to a diffusion pipe system of a high-temperature annealing furnace double-coil-position trolley and a use method thereof. BACKGROUND

[0002] When the oriented silicon steel is annealed in a step trolley cover type high-temperature furnace, multiple trolleys move in a kiln formed by a furnace chamber according to a process, a refractory trolley body made of high-temperature resistant material is arranged on each trolley, the refractory trolley body is used to carry a steel coil, and the steel coil is covered by an inner cover to be covered in an independent sealed space, so that the steel coil in the inner cover is annealed at a specific micro-positive pressure environment at high temperature after being filled with a protective gas in the space, the bottom end of the inner cover is inserted into a sand groove corresponding to the top surface of the refractory trolley body to seal the contact part between the bottom end of the inner cover and the refractory trolley body; because the process protective gas reacts with various impurity elements in the steel coil to generate waste gas at high temperature, the high-temperature waste gas is discharged out of the cover through a diffusion pipe, the diffusion pipe currently used has one end entering the space surrounded by the inner cover and the other end directly diffusing into the furnace chamber to form a long-lasting fire through pipe bending, because the waste gas is easily lifted when being discharged in the cover, the quartz sand at the contact part between the bottom end of the inner cover and the sealing sand is lifted and enters the diffusion pipe, which is easy to accumulate and block the pipe or enter the ball valve on the pipe to damage the ball valve. SUMMARY

[0003] To solve the above problems in the prior art, the present application provides a diffusion pipe system of a high-temperature annealing furnace double-coil-position trolley to solve the problem that the quartz sand may enter the diffusion pipe to cause blockage or damage to the ball valve when discharging waste gas.

[0004] To achieve the above technical purposes, the technical scheme of the present application is as follows:

[0005] A venting pipe system for a dual-coil trolley in a high-temperature annealing furnace includes a refractory platform, a trolley body, a cylindrical cover, and a piping structure. The refractory platform is supported on the trolley body and includes a support base and load-bearing brick assemblies arranged side-by-side on the support base. A surrounding sand trough is formed on the top surface of the support base corresponding to the outer periphery of each load-bearing brick assembly, and the sand trough is filled with sealing sand. The cylindrical cover encloses the load-bearing brick assemblies, and its bottom end is sealed within the sand trough. The piping structure includes a flat pipe, an in-coverage venting pipe assembly, an in-furnace exhaust gas treatment pipe, an out-of-furnace venting pipe assembly, and an in-coverage air inlet pipe. The flat pipe is installed at the bottom of the trolley body and has a valve in the middle, dividing the flat pipe into two sections. Each end of the flat pipe extends to the support base below the corresponding two load-bearing brick assemblies. There are two in-coverage venting pipe assemblies, connected to the two end sections of the flat pipe. Each in-coverage venting pipe assembly includes several vertical pipes and corresponding detachably installed at the lower end of each vertical pipe. The blind tubes are connected at the bottom of each vertical tube to the flat tube, and at the other end extend upward through the car body, out of the top surface of the bearing base, and into the gap between the brick columns of the load-bearing brick group. The blind tubes are detachably connected to the bottom of the corresponding vertical tubes on the flat tube. The exhaust gas treatment pipes in the furnace include a guide pipe body and an exhaust pipe body. The two ends of the guide pipe body are respectively connected to the two ends of the flat tube. The exhaust pipe body is connected to the guide pipe body and extends upward through the bearing base into the furnace to allow the exhaust gas to be discharged into the furnace for combustion. The furnace external venting pipe group is installed on the outside of the furnace. There are two groups, which are respectively installed at the ends of the two ends of the flat tube. They are used to ignite the exhaust gas, detect the pressure, and detect the gas composition content in the pipe. There are two air inlet pipes in the hood to allow gas to be filled into the two cylinders on the trolley. One end of each air inlet pipe extends out of the bottom of the car body, and the other end extends upward through the refractory platform, beyond the top of the load-bearing brick group, and extends to the center of the top surface of the adjacent cylinder.

[0006] Furthermore, each of the aforementioned external venting pipe assemblies includes three branches: the first branch is connected to a burner for external ignition; the second branch is connected to a pressure measuring instrument for measuring the gas pressure inside the pipe; and the third branch is connected to a gas content measuring instrument for detecting the gas content. The first branch, the second branch, and the third branch are installed sequentially at the end of each end section of the flat-laid pipe, with the first branch located at the very end.

[0007] Furthermore, a removable inner wire mesh cover is installed at the bottom end of the second branch and the third branch.

[0008] Furthermore, an internal threaded plug is provided at the bottom inner end of the cecal tube, and the internal threaded plug is installed at the bottom end of the cecal tube by means of threads.

[0009] Further, the guide pipe body comprises a middle section and side sections vertically connected to both ends of the middle section, and the two side sections are connected to the two end sections of the flat pipe respectively and located on both sides of the valve, and the discharge pipe body is connected to the middle section of the guide pipe body, so that the exhaust gas discharged into the diffusion pipe group in the cover flows into the flat pipe and then flows into the corresponding side section of the guide pipe body and then flows to the middle section and then flows into the discharge pipe body.

[0010] Further, the high-temperature annealing furnace comprises a furnace body, and the trolley body is slidably installed in the hearth of the furnace body, and the two sides of the trolley body are sealingly connected to the side walls of the furnace body, so that the side walls and the top wall of the furnace body and the top surface of the trolley body form a closed heating space in the hearth.

[0011] Further, the bearing base comprises a heat insulation layer, an expansion sealing ring, a castable outer periphery, a support brick group, and a castable inner structure, the heat insulation layer is laid on the trolley body, the expansion sealing ring is arranged on the heat insulation layer and has a double-ring structure formed integrally side by side, the castable outer periphery surrounds the outer periphery of the expansion sealing ring, the support brick group is built in the expansion sealing ring, and a preset interval is formed between the outer periphery of the support brick group and the inner periphery of the expansion sealing ring, the castable inner structure is convex and comprises a main body and a peripheral edge formed integrally at the bottom end of the outer periphery of the main body, the main body is correspondingly formed with hollow holes matching the support brick group, and the main body covers the support brick group, and the peripheral edge is filled in the lower end of the interval and is correspondingly formed as the sand groove at the upper end of the interval.

[0012] Further, the outer periphery of the castable outer periphery is formed with a lower curved sealing convex part at one end and a lower curved sealing concave part at the other end, so that when two adjacent trolleys are connected side by side, the lower curved sealing convex part at one end of one trolley is matched with the lower curved sealing concave part at one end of the other trolley.

[0013] In addition, the application also provides a use method of the diffusion pipe system of the double-coil-position trolley of the high-temperature annealing furnace.

[0014] The use method is as follows:

[0015] The steel coil is installed on the bearing brick group and is sealed by the cylinder cover;

[0016] First, the cylinder cover is filled with protective gas through the gas inlet pipe in each cover, and the air in the cylinder cover is discharged through the in-cover diffusion pipe group, and the air in the in-cover diffusion pipe group is discharged through the first branch of the in-furnace exhaust gas treatment pipe and / or the out-furnace diffusion pipe group;

[0017] As annealing proceeds, waste gas is formed inside the hood. When the third branch of the external venting pipe group detects that the waste gas concentration has reached a certain standard, the air inlet pipe inside the hood is activated to replenish the protective gas inside the hood. The air inside the hood will be introduced into the furnace waste gas treatment pipe and / or the external venting pipe group through the internal venting pipe group, so that the waste gas can be introduced into the furnace for combustion through the discharge pipe of the furnace waste gas treatment pipe, or introduced into the furnace for combustion outside the furnace through the first branch of the external venting pipe group.

[0018] Furthermore, when a certain amount of sand accumulates in the venting tube assembly inside the enclosure, the inner thread plug of the cecal tube should be unscrewed periodically to remove the sand.

[0019] Compared with the prior art, the venting pipe system of the dual-position trolley of the high-temperature annealing furnace of the present invention has the following beneficial effects: By setting the pipe structure, it is easy to clean the pipe dust and sand particles, and protect the pipe and ball valve: Due to the design of the blind tube, if dust and sand particles are introduced, they can be deposited at the blind tube end below each branch venting vertical pipe. They can be cleaned by simply unscrewing the inner threaded tube cap of the blind end periodically, which fully protects the pipe and ball valve. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of a high-temperature annealing furnace equipped with a double-coil trolley, according to a preferred embodiment of the present invention.

[0021] Figure 2 This is a side view of a walking trolley used in a high-temperature annealing furnace according to a preferred embodiment of the present invention;

[0022] Figure 3 for Figure 2 The cross-sectional view of the stepping trolley in the AA direction (i.e., the main view direction) is shown.

[0023] Figure 4 for Figure 1 An exploded view of the stepping trolley shown;

[0024] Figure 5 This is a perspective view of the piping structure of the venting pipe system of the dual-position trolley of the high-temperature annealing furnace according to a preferred embodiment of the present invention.

[0025] Figure 6 For two units Figure 1 The side view shown shows the walking trolley connected inside the furnace.

[0026] The annotations in the attached figures are explained as follows:

[0027] 11-Furnace body; 12-Outer frame; 300-Steel coil; 20-Refractory platform; 30-Car body; 40-Cylinder cover; 50-Pipeline structure; 201-Bearing base; 202-Bearing brick assembly; 2011-Sand trough; 21-Heat insulation layer; 22-Expansion sealing ring; 23-Outer perimeter of castable refractory; 24-Supporting brick assembly; 25-Inner structure of castable refractory; 26-Outer perimeter refractory brick layer; 231-Lower curved seal protrusion; 232-Lower curved seal recess ; 251-Main body; 252-Periphery; 27-Bearing disc; 51-Flat pipe; 52-Inner venting pipe assembly; 53-Inner furnace exhaust gas treatment pipe; 54-Outer furnace venting pipe assembly; 55-Inner venting pipe fitting; 511-Valve; 512-End section; 521-Vertical pipe; 522-Blind pipe; 531-Conductor pipe body; 532-Discharge pipe body; 541-First branch; 542-Second branch; 543-Third branch. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] like Figures 1-3 As shown, a preferred embodiment of the present invention discloses a high-temperature annealing furnace equipped with a double-coil trolley. The high-temperature annealing furnace includes a furnace body 11 and an outer frame 12 installed on the outer periphery of the furnace body 11. The furnace body 11 includes side walls and a top wall, both of which are formed of several layers of refractory material. The side walls and the top wall are connected to the outer frame 12 by connecting bolts. The double-coil trolley is used to carry steel coils 300 and transport them within the annealing furnace. The double-coil trolley includes a refractory platform 20, a carriage body 30 for carrying the refractory platform 20, and a cylindrical cover 40 for sealing the refractory platform 20. The refractory platform 20 carries the steel coils 300, and the cylindrical cover 40 seals the steel coils 300. The car body 30 is slidably installed inside the furnace chamber of the furnace body 11. The two sides of the car body 30 are sealed to the side walls of the furnace body 11, so that the side walls and top walls of the furnace body 11 and the top surface of the car body 30 form a closed heating space inside the furnace chamber. Burners (not shown) are installed on the side walls of the furnace body 11. The burners extend into the heating space and burn gas through the burners to heat the heating space, thereby heating the steel coil 300 inside the cylinder shroud 40 and realizing the annealing process of the steel coil 300.

[0030] When the steel coil 300 in the cylinder cover 40 is annealed, the cylinder cover 40 has a protective gas, and under certain temperature conditions, the protective gas reacts with various impurity elements in the steel coil to produce waste gas, which is timely discharged outside the cover and the protective gas is replenished in the cylinder cover 40. The pipe structure 50 is further installed on the double coil position trolley, and the waste gas is discharged or the protective gas is filled through the pipe structure 50. Therefore, the trolley body 30, the refractory table body 20 carried on the trolley body 30, the cylinder cover 40 and the pipe structure 50 can be regarded as the components of the diffusion pipe system of the double coil position trolley of the high-temperature annealing furnace.

[0031] The refractory table body 20 includes a bearing base 201 and a bearing brick group 202 installed on the bearing base 201 and arranged side by side. The top surface of the bearing base 201 is formed with a surrounding sand groove 2011 corresponding to the outer periphery of each bearing brick group 202, and the sand groove 2011 contains sealing sand.

[0032] Please refer to Figure 4 The bearing base 201 includes a heat insulation layer 21, an expansion sealing ring 22, a castable outer periphery 23, a support brick group 24, a castable inner structure 25, and an outer peripheral refractory brick layer 26. The heat insulation layer 21 is laid on the trolley body 30 to reduce or block the heat transfer between the refractory and the frame 10. The heat insulation layer 21 can be made of semi-hard aluminum silicate fiber board, which has good heat insulation effect. The expansion sealing ring 22 is arranged on the heat insulation layer 21 and is arranged on the two sides of the refractory in the expansion sealing ring 22. The expansion sealing ring 22 can buffer the thermal expansion of the refractory after being heated, so as to prolong the service life of the refractory. The expansion sealing ring 22 is fixed on the heat insulation layer 21, and in this embodiment, a double-ring structure is integrally formed side by side. The castable outer periphery 23 surrounds the outer periphery of the expansion sealing ring 22. Specifically, the castable outer periphery 23 is cast on the heat insulation layer 21 to surround the outer periphery of the expansion sealing ring 22, and is lower than the height of the expansion sealing ring 22. Please refer to Figure 6 The outer periphery of the castable outer periphery 23 is formed with a lower curved sealing convex portion 231 at one end and a lower curved sealing concave portion 232 at the other end. When two adjacent trolleys are arranged side by side, the lower curved sealing convex portion 231 at one end of one trolley cooperates with the lower curved sealing concave portion 232 at one end of the other trolley to block the heat transfer below the refractory table body 20 in the furnace.

[0033] The support brick group 24 is built in the expansion sealing ring 22, and a preset interval is formed between the outer periphery of the support brick group 24 and the inner periphery of the expansion sealing ring 22. In the embodiment, the support brick group 24 is two, and each is disc-shaped and built in each ring of the expansion sealing ring 22. A preset interval is formed between each support brick group 24 and the inner wall of the corresponding ring of the expansion sealing ring 22. The support brick group 24 is formed by stacking bricks into several brick columns, and then the several brick columns are arranged in a disc shape. The gaps in the form of a sector are formed between adjacent brick columns, and the several brick columns arranged in a disc shape surround a cylindrical central hole. The height of the support brick group 24 is substantially equal to the height of the expansion sealing ring 22. Thus, the depth of the interval formed between the outer periphery of the support brick group 24 and the inner periphery of the expansion sealing ring 22 is substantially equal to the height of the expansion sealing ring 22.

[0034] The castable inner structure 25 is formed by casting corresponding to each support brick group 24. The castable inner structure 25 is convex, and includes a main body 251 and a peripheral edge 252 integrally formed at the bottom outer periphery of the main body 251. The main body 251 is correspondingly formed with a hollow hole matching the support brick group 24, and the main body 251 covers the support brick group 24. The peripheral edge 252 is filled in the lower end of the interval, and is correspondingly formed into the sand groove 2011 at the upper end of the interval. The depth of the sand groove 2011 is corresponding to the height of the expansion sealing ring 22 exceeding the top surface of the peripheral edge 252. The castable inner structure 25 is cast on the heat insulation layer 21 and covers the support brick group 24. The main body 251 is formed by the castable material penetrating into the gaps between the brick columns of the support brick group 24. The position of the brick column is the hollow hole on the main body 251, and the top end of the main body 251 is horizontal. After the castable inner structure 25 is formed, the height of the main body 251 is substantially equal to the height of the support brick group 24. In the embodiment, the number of the castable inner structure 25 corresponding to the support brick group 24 is two, and the two castable inner structures 25 can be integrally cast.

[0035] The peripheral refractory brick layer 26 is built on the top surface of the castable peripheral 23, and surrounds the outer periphery of the upper end of the expansion sealing ring 22. The height of the built peripheral refractory brick layer 26 is substantially equal to the height of the expansion sealing ring 22.

[0036] The load-bearing brick group 202 is built corresponding to the support brick group 24. The lower end surface of the load-bearing brick group 202 corresponds to the shape and size of the upper end surface of the support brick group 24. Similarly, the load-bearing brick group 202 is formed by stacking bricks into several brick columns, and then the several brick columns are arranged in a disc shape. The gaps in the form of a sector are formed between adjacent brick columns, and the several brick columns arranged in a disc shape surround a cylindrical central hole. In the embodiment, the corresponding load-bearing brick group 202 is two, and is built on the corresponding support brick group 24. Each brick column of the load-bearing brick group 202 is correspondingly built on the brick column of the support brick group 24.

[0037] Further, the refractory platform 20 comprises a load-bearing disc 27, which has a size corresponding to that of the top surface of the load-bearing brick group 202, and is used to be laid on the top surface of the load-bearing brick group 202 to bear the steel coil. In the embodiment, there are two load-bearing discs 27, which are respectively laid on the top surfaces of the corresponding load-bearing brick groups 202. After each load-bearing disc 27 bears the steel coil, the steel coil is respectively covered by the cylinder cover 40, and the lower end of the cylinder cover 40 is inserted into the sand groove 2011.

[0038] Please refer to Figure 5 The pipeline structure 50 comprises a flat pipeline 51, an in-shelter diffusion pipe group 52, an in-furnace exhaust gas treatment pipe 53, an out-of-furnace diffusion pipe group 54, and an in-shelter air inlet pipe 55. The flat pipeline 51 is installed at the bottom of the vehicle body 30, and a valve 511 is arranged in the middle of the flat pipeline 51 to divide the flat pipeline 51 into two end sections 512. The two end sections 512 of the flat pipeline 51 respectively extend to the lower sides of the two load-bearing brick groups 202. The in-shelter diffusion pipe group 52 comprises two groups, which are respectively connected to the two end sections 512 of the flat pipeline 51. Each in-shelter diffusion pipe group 52 comprises a plurality of vertical pipes 521 and a blind pipe 522 which is detachably connected to the lower end of each vertical pipe 521. One end of each vertical pipe 521 is connected to the flat pipeline 51, and the other end extends upward through the vehicle body 30, penetrates the top surface of the load-bearing base 201, and is arranged in the gap between the brick columns of the load-bearing brick group 202, so as to be flush with or slightly protrude from the top surface of the load-bearing base 201 to guide the exhaust gas in the cylinder cover 40 to be discharged. The blind pipe 522 is detachably connected to the bottom end of the vertical pipe 521 or is detachably connected to the flat pipeline 51 at the bottom end of the vertical pipe 521. When sand is poured into the vertical pipe 521, the sand particles will fall into the blind pipe 522, so as to prevent the vertical pipe 521 from being blocked. When the sand particles accumulate to a certain amount, the sand particles can be poured out by detaching the blind pipe 522. Further, an inner plug is arranged in the bottom end of the pipe of the blind pipe 522. The inner plug is screwed to the bottom end of the blind pipe 522. In this way, when the sand particles in the blind pipe 522 are discharged, the blind pipe 522 does not need to be detached, and the sand particles can be poured out by only unscrewing the inner plug.

[0039] The furnace waste gas treatment pipe 53 includes a connecting pipe body 531 and a discharge pipe body 532. The two ends of the connecting pipe body 531 are connected to the two end sections 512 of the flat pipe 51 respectively. In this embodiment, the connecting pipe body 531 is in a U shape, including a middle section and side sections connected to the two ends of the middle section vertically. The two side sections are connected to the two end sections 512 of the flat pipe 51 respectively, and are located on the two sides of the valve 511, so that the waste gas in the cover-inlet exhaust pipe group 52 arranged on the two end sections can flow into the corresponding side section of the connecting pipe body 531 and then flow to the middle section for collection. The discharge pipe body 532 is connected to the connecting pipe body 531 and is used to guide the waste gas flowing into the connecting pipe body 531. The discharge pipe body 532 extends upward through the bearing base 201, and the top end of the discharge pipe body 532 extends out of the hearth, so that the waste gas can be ignited at the top end of the discharge pipe body 532 to convert the waste gas into heat energy for utilization. In this embodiment, the discharge pipe body 532 is connected to the middle section of the connecting pipe body 531, so that the waste gas discharged from the two covers can be guided out of the hearth for combustion through the discharge pipe body 532. Further, a ball valve is arranged on the side section of the connecting pipe body 531, so as to independently control whether the waste gas in the corresponding cover is guided into the discharge pipe body 532.

[0040] The two furnace-outlet exhaust pipe groups 54 are installed on the outside of the hearth, and each of the two furnace-outlet exhaust pipe groups 54 is installed at the end of the corresponding end section 512 of the flat pipe 51. Each furnace-outlet exhaust pipe group 54 includes three branches, which are connected to the end of the flat pipe 51 side by side and below the bottom surface of the vehicle body 30, and are connected to the flat pipe 51 vertically. The first branch 541 is used as a furnace-outlet ignition branch pipe and is connected to a torch for ignition. A ball valve is arranged on the first branch 541 for opening and closing. When the waste gas is discharged in the cover and has not been combusted in the hearth, the waste gas can be ignited through the first branch 541. When the waste gas is combusted in the hearth through the furnace waste gas treatment pipe 53, the waste gas can also be ignited through the first branch 541. The second branch 542 is used as a pressure measurement port and is connected to a pressure measurement instrument for real-time detection of the pressure in the cover. A ball valve is arranged on the second branch 542 for opening and closing. The third branch 543 is used as a measurement port for detecting the gas content and is connected to a gas content measurement instrument for real-time detection of the gas component content in the cover. A ball valve is arranged on the third branch 543 for opening and closing. Further, the first branch 541, the second branch 542 and the third branch 543 are installed in sequence at the end of each end section 512 of the flat pipe 51, and the first branch 541 is located at the most tail end. Further, the bottom end of the second branch 542 and the third branch 543 can be further provided with a detachable inner mesh cover, which has a filtering effect and prevents sand from entering the measurement instrument, and facilitates the removal of the entered sand.

[0041] Two in-shroud gas feeding pipes 55 are installed at the bottom of the trolley body 30 to feed protective gas such as nitrogen and hydrogen into the two trolley turrets 40, respectively. Specifically, one end of each in-shroud gas feeding pipe 55 extends out of the bottom surface of the trolley body 30, and the other end penetrates through the refractory trolley body 20 upwards to the top surface center of the trolley turret 40. In this way, when the in-shroud gas feeding pipe 55 feeds gas into the trolley turret 40, the fed gas is above the trolley turret 40, and as the feeding process proceeds, the newly fed gas can push the gas below it out through the in-shroud gas dispersing pipe group 52. A ball valve is arranged on each in-shroud gas feeding pipe 55 for opening and closing.

[0042] During annealing processing, the gas dispersing pipe system of the double coil position trolley of the high-temperature annealing furnace is started, and the use method is as follows:

[0043] The steel coil is installed on the load-bearing brick group 202 and is sealed by the trolley turret 40;

[0044] First, protective gas is fed into the trolley turret 40 through each in-shroud gas feeding pipe 55, and the air in the trolley turret 40 is discharged through the in-shroud gas dispersing pipe group 52. The air in the in-shroud gas dispersing pipe group 52 is discharged through the first branch 541 of the furnace outer gas dispersing pipe group 54 and the furnace inner waste gas treatment pipe 53; or the air is discharged to the atmosphere through the first branch 541 of the furnace outer gas dispersing pipe group 54 by closing the furnace inner waste gas treatment pipe 53;

[0045] The burner of the annealing furnace is started to anneal, and as the annealing process proceeds, waste gas is formed in the trolley turret 40. When the third branch 543 of the furnace outer gas dispersing pipe group 54 detects that the concentration of the waste gas reaches a certain standard, the in-shroud gas feeding pipe 55 is started to supplement protective gas into the trolley turret 40;

[0046] The air in the trolley turret 40 is guided into the furnace inner waste gas treatment pipe 53 and the furnace outer gas dispersing pipe group 54 through the in-shroud gas dispersing pipe group 52. The waste gas is guided into the furnace combustion chamber through the discharge pipe body 532 of the furnace inner waste gas treatment pipe 53 for combustion, or is guided into the furnace outer combustion through the first branch 541 of the furnace outer gas dispersing pipe group 54.

[0047] Further, when the sand particles falling into the in-shroud gas dispersing pipe group 52 accumulate to a certain amount, the inner plug cap of the cecum pipe 522 is regularly unscrewed to remove the sand particles to prevent the pipeline from being blocked.

[0048] In summary, the effect of the gas dispersing pipe system of the double coil position trolley of the high-temperature annealing furnace provided by the present application includes the following:

[0049] 1) Easy to clean the pipeline dust and sand particles, and protect the pipeline and ball valve: The trolley uses a cecum type gas dispersing pipe system. If dust and sand particles are brought in and raised, they can be deposited at the lower end of the cecum pipe of each sub-dispersing vertical pipe. Only the inner plug of the blind end needs to be regularly unscrewed to clean it, thereby fully protecting the pipeline and ball valve.

[0050] 2), can be used with double position, also can be used with single position: the cecum type diffusion pipeline system of the application is connected to the furnace diffusion vertical pipe between each position, and each furnace diffusion branch pipe is independent for each position. In use, when the double position steel coil annealing is used, it can meet the independent adjustment under the pressure and oxygen content data range of each position cover. When a certain side position works alone, only the ball valve under the non-working coil position needs to be completely closed.

[0051] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields, are also included.

Claims

1. A kind of high-temperature annealing furnace double-volition trolley's diffusion pipe system, including refractory platform body (20), car body (30), cylinder cover (40) and pipe structure (50), refractory platform body (20) is carried on car body (30), it is characterized by: The refractory table body (20) comprises a bearing base (201) and bearing brick groups (202) installed on the bearing base (201) and arranged side by side, a circumferential sand groove (2011) is formed on the top surface of the bearing base (201) corresponding to the outer periphery of each bearing brick group (202), and sealing sand is arranged in the sand groove (2011); a cylinder cover (40) covers the bearing brick groups (202) and is sealed at the bottom end in the sand groove (2011); a pipeline structure (50) comprises a flat pipe (51), cover-inlet pipe groups (52), an in-furnace waste gas treatment pipe (53), an out-furnace diffusion pipe group (54), and a cover-inlet gas pipe (55); the flat pipe (51) is installed at the bottom of the vehicle body (30), a valve (511) is arranged in the middle of the flat pipe (51), the flat pipe (51) is divided into two end sections (512), the two end sections (512) of the flat pipe (51) extend to the lower side of the bearing base (201) corresponding to the two bearing brick groups (202) respectively, the cover-inlet pipe groups (52) are two groups and are connected to the two end sections (512) of the flat pipe (51) respectively, each cover-inlet pipe group comprises a plurality of vertical pipes (521) and a blind pipe (522) detachably installed at the lower end of each vertical pipe (521) correspondingly, the lower end of each vertical pipe (521) is connected to the flat pipe (51), and the other end extends upward through the vehicle body (30), penetrates the top surface of the bearing base (201) and enters the gap between the brick columns of the bearing brick groups (202); the blind pipe (522) is detachably connected to the flat pipe (51) at the lower end of the vertical pipe (521); the in-furnace waste gas treatment pipe (53) comprises a connecting pipe body (531) and a discharge pipe body (532), the two ends of the connecting pipe body (531) are connected to the two end sections (512) of the flat pipe (51) respectively, and the discharge pipe body (532) is connected to the connecting pipe body (531) and extends upward to the hearth to discharge waste gas into the hearth for combustion; the out-furnace diffusion pipe group (54) is installed on the outside of the hearth and comprises two groups, which are installed at the ends of the two end sections (512) of the flat pipe (51) respectively, for igniting waste gas, detecting pressure and detecting the content of gas in the pipe; the cover-inlet gas pipe (55) is two pipes for filling gas into the two cylinder covers (40) respectively, one end of each cover-inlet gas pipe (55) extends out of the bottom of the vehicle body (30), the other end extends upward through the refractory table body (20), exceeds the top end of the bearing brick groups (202) and extends to the top surface center position near the cylinder cover (40); Each out-furnace diffusion pipe group (54) comprises three branches, a first branch (541) is connected with a torch for igniting outside the furnace, a second branch (542) is connected with a pressure measuring instrument for measuring the pressure of gas in the pipe, and a third branch (543) is connected with a gas content measuring instrument for detecting the content of gas; the first branch (541), the second branch (542) and the third branch (543) are sequentially installed at the ends of the two end sections (512) of the flat pipe (51), and the first branch (541) is located at the most tail end. The inner end of the tube part of the cecum pipe (522) is provided with an inner plug cover which is installed at the bottom end of the cecum pipe (522) by screw thread.

2. The diffuser tube system of claim 1, wherein: The bottom end of the second branch (542) and the third branch (543) is provided with a detachable inner wire mesh cover.

3. The diffuser tube system of claim 1, wherein: The guide pipe body (531) comprises a middle section and side sections vertically connected to both ends of the middle section, and both side sections are connected to the end sections (512) of the flat pipe (51) and located on both sides of the valve (511). The exhaust pipe body (532) is connected to the middle section of the guide pipe body (531) to allow the exhaust gas discharged into the diffusion pipe group (52) in the cover to flow into the flat pipe (53) and then flow into the corresponding side section of the guide pipe body (531) and then flow to the middle section of the guide pipe body (531).

4. The diffuser tube system of claim 1, wherein: The high-temperature annealing furnace comprises a furnace body (11), a trolley body (30) slidably installed in the hearth of the furnace body (11), and the two sides of the trolley body (30) are sealingly connected to the side walls of the furnace body (11), so that the side walls and top wall of the furnace body (11) and the top surface of the trolley body (30) form a closed heating space in the hearth.

5. The diffuser tube system of claim 1, wherein: The supporting base (201) comprises a heat insulation layer (21), an expansion sealing ring (22), a castable outer periphery (23), a supporting brick group (24), and a castable inner structure (25). The heat insulation layer (21) is laid on the trolley body (30), the expansion sealing ring (22) is arranged on the heat insulation layer (21) and has a double-ring structure formed integrally side by side, the castable outer periphery (23) surrounds the outer periphery of the expansion sealing ring (22), the supporting brick group (24) is built in the expansion sealing ring (22) and has a preset interval between the outer periphery of the supporting brick group (24) and the inner periphery of the expansion sealing ring (22), and the castable inner structure (25) has a convex shape and comprises a main body part (251) and a peripheral edge (252) integrally formed at the bottom outer periphery of the main body part (251). The main body part (251) is correspondingly formed with hollow holes matching the supporting brick group (24), and the main body part (251) covers the supporting brick group (24). The peripheral edge (252) is filled in the lower end of the interval and correspondingly formed as the sand groove (2011) at the upper end of the interval.

6. The diffuser tube system of claim 5, wherein: One end of the outer periphery of the castable outer periphery (23) is formed with a lower curved sealing convex part (231), and the other end is formed with a lower curved sealing concave part (232), so that when two adjacent trolleys are connected side by side, the lower curved sealing convex part (231) of one trolley is matched with the lower curved sealing concave part (232) of the other trolley.

7. A method of using the diffusion tube system of a double-position car of a high-temperature annealing furnace according to any one of claims 1 to 6, characterized in that, The use method is as follows: The steel coil is installed on the load-bearing brick group (202) and sealed by the cylinder cover (40); First, protective gas is filled into the cylinder cover (40) through each cover inner air inlet pipe (55), and the air in the cylinder cover (40) is discharged through the cover inner diffusion pipe group (52), and the air in the cover inner diffusion pipe group (52) is discharged through the furnace inner exhaust gas treatment pipe (53) and / or the first branch (541) of the furnace outer diffusion pipe group (54); With the annealing going on, exhaust gas is formed in the cylinder cover (40), and when the third branch (543) of the furnace outer exhaust pipe group (54) detects that the exhaust gas concentration reaches a certain standard, the cover inner air inlet pipe (55) is started to supplement the protective gas into the cylinder cover (40); the air in the cylinder cover (40) will be guided into the furnace exhaust gas treatment pipe (53) and / or the furnace outer exhaust pipe group (54) through the cover inner exhaust pipe group (52), so as to guide the exhaust gas into the furnace through the exhaust pipe body (532) of the furnace exhaust gas treatment pipe (53) for combustion, or through the first branch (541) of the furnace outer exhaust pipe group (54) for combustion outside the furnace.

8. The method of using a diffuser tube system of claim 7, wherein: When the sand particles falling into the cover inner exhaust pipe group (52) accumulate to a certain amount, the inner plug cover of the cecum pipe (522) is regularly unscrewed to remove the sand particles.

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