Anti-oxidation heat treatment device for production of marine flat-bulb steel

Abstract

The utility model provides an anti-oxidation heat treatment device for producing marine flat-bulb steel, and relates to the technical field of metal heat treatment. A bottom plate is mounted at the upper end of the fixing frame through bolts, sealing plates are mounted at the front end and the rear end of the bottom plate through bolts, two reinforcing rods are mounted between the two sealing plates through bolts, and a top plate is mounted on the two reinforcing rods through bolts; according to the utility model, due to the unique design of the positioning part, the positioning part has the capability of efficiently positioning the ship flat-bulb steel, the position of the flat-bulb steel is ensured to be fixed in the heating process, and the consistency of the heat treatment effect is ensured; the first motor is operated to enable the groove roller to rotate, the high-temperature heater can do reciprocating motion, flat-bulb steel can be evenly heated, the situation of local overheating or insufficient heating is avoided, the heat treatment quality and uniformity are improved, meanwhile, the reciprocating motion of the high-temperature heater increases the heating coverage range, and the heating efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal heat treatment technical field especially relates to a kind of anti-oxidation heat treatment device for ship flat bulb steel production. BACKGROUND

[0002] Shipbuilding is a complex and highly demanding industry for material performance, and ship flat bulb steel, as an indispensable key structural material in shipbuilding, is widely used in the framework of hull, deck and bulkhead. Its quality is directly related to the safety, stability and service life of the ship during navigation. In the production process of ship flat bulb steel, heat treatment is an extremely important process. Through appropriate heat treatment process, the internal structure of flat bulb steel can be significantly improved, and its mechanical properties such as strength and toughness can be improved to meet the stringent use requirements of ships under different working conditions. The utility model is an anti-oxidation heat treatment device for ship flat bulb steel production.

[0003] The existing anti-oxidation heat treatment device for ship flat bulb steel production is difficult to position and fix different size flat bulb steel in a short time, consumes a lot of manpower and time, and the positioning accuracy is difficult to guarantee, which leads to the position of flat bulb steel changing easily during heat treatment, seriously affecting the consistency of heat treatment effect, and the heating area is limited, which is difficult to cover all parts of flat bulb steel, inevitably causing local overheating or insufficient heating. SUMMARY

[0004] The present disclosure relates to an anti-oxidation heat treatment device for ship flat bulb steel production to solve the technical problems raised in the background.

[0005] In the first aspect of the present disclosure, an anti-oxidation heat treatment device for ship flat bulb steel production is provided, which specifically comprises: a fixing frame;

[0006] The lower end of the fixing frame is provided with four groups of supporting feet, and the upper end of the fixing frame is provided with a bottom plate through bolts. The front and rear ends of the bottom plate are provided with sealing plates through bolts. Two groups of reinforcing rods are installed between the two sealing plates through bolts. The top plate is installed on the two groups of reinforcing rods through bolts. The dehumidification fan is installed on the top plate through bolts. The left and right ends of the bottom plate are provided with positioning components. Two groups of bearing seats are installed on the bottom plate through bolts. Two groups of rail rods are fixed between the two groups of bearing seats. The movable seat is movably installed on the two groups of rail rods. The high-temperature heater is installed on the upper end of the movable seat through bolts. The groove roller is rotatably installed between the two groups of bearing seats. The reciprocating spiral groove is arranged on the groove roller. The No. 1 motor is installed on the bottom plate through bolts. The output shaft of the No. 1 motor is connected with the groove roller. The rotating seat is installed on the lower end of the movable seat through pin shaft. Two groups of contact rods are installed on the rotating seat. The two groups of contact rods are movably arranged in the reciprocating spiral groove on the groove roller.

[0007] In at least some embodiments,

[0008] The positioning component comprises a mounting rack, a rail rack, a first movable plate, a second movable plate, a hydraulic rod and a protective rack, the mounting rack is mounted on the bottom plate, the rail rack is provided with two groups, the two groups of rail racks are mounted on the mounting rack, the first movable plate and the second movable plate are movably arranged in the two groups of rail racks respectively, the upper and lower ends of the first movable plate and the second movable plate are provided with rolling columns, the hydraulic rod is fixed at the lower end of the mounting rack, and the protective rack is provided with two groups, and the two groups of protective racks are fixed at the front and rear ends of the mounting rack.

[0009] In at least some embodiments,

[0010] The mounting rack is provided with a rotatable gear, the first movable plate and the second movable plate are fixed with gear plates respectively, the gear plates on the first movable plate and the second movable plate are engaged with the gear on the mounting rack, a connecting plate is mounted on the second movable plate, the lower end of the connecting plate is connected with the piston rod of the hydraulic rod, and the first movable plate and the second movable plate are provided with positioning wheels.

[0011] In at least some embodiments,

[0012] The transmission rollers are mounted between the two groups of sealing plates through bearings, the front ends of the transmission rollers are fixed with sprockets, the sealing plate close to the front end of the bottom plate is provided with a gearbox mounted through bolts, the output shaft of the gearbox is fixed with a sprocket, and the gearbox is provided with a No. 2 motor mounted through bolts.

[0013] In at least some embodiments,

[0014] The sealing plate close to the front end of the bottom plate is fixed with a fixed rod, the fixed rod is provided with a sprocket mounted through a bearing, the three sprockets are connected with a transmission chain, and the sealing plate close to the front end of the bottom plate is provided with a shell seat mounted through bolts, the shell seat is movably provided with a supporting arm, and the supporting arm is provided with a threaded hole.

[0015] In at least some embodiments,

[0016] The supporting arm is provided with a sprocket, the sprocket on the supporting arm is tightly arranged on the transmission chain, the shell seat is provided with a cover plate mounted through bolts, the cover plate is provided with an adjusting screw rod mounted through a lock ring, and the adjusting screw rod is screwed into the threaded hole in the supporting arm.

[0017] In at least some embodiments,

[0018] The inner walls of the two groups of sealing plates are provided with frames mounted through bolts, the two groups of frames are movably provided with sliding seats, the two groups of sliding seats are provided with top rollers mounted through bearings, and the top plate is provided with two groups of threaded seats mounted through bolts, the threaded seats are screwed with lead screws, the upper ends of the lead screws are provided with hand wheels, and the lower ends of the two groups of lead screws are connected with the two groups of sliding seats through lock rings.

[0019] In at least some embodiments,

[0020] The two groups of mounting plates are bolted on the fixed frame, the upper ends of the two groups of mounting plates are bolted with a partition plate, the partition plate is bolted with a flow divider, two groups of round rods are fixed between the two groups of sealing plates, the two groups of round rods are both bolted with adjusting seats, two groups of nozzles are installed on the two groups of adjusting seats, and the two groups of nozzles are both connected with the flow divider through connecting pipes, and the flow divider is connected with an external nitrogen supply device.

[0021] The anti-oxidation heat treatment device for ship ball flat steel production has the following beneficial effects:

[0022] In the utility model, the unique design of the positioning component has the ability of efficiently positioning the ship ball flat steel, the second movable plate is driven through the hydraulic rod, the synchronous reverse movement of the first movable plate and the second movable plate is realized through the meshing of the gear and the toothed plate, the positioning wheel installed on the first movable plate and the second movable plate can quickly and accurately position the ball flat steel of different sizes, not only reduces the friction when the ball flat steel is placed, facilitates operation, but also plays a role in stable support in the heat treatment process, ensures the position of the ball flat steel fixed in the heating process, and guarantees the consistency of the heat treatment effect.

[0023] In addition, in the utility model, the groove roller driven by the No. 1 motor, the reciprocating spiral groove on the surface cooperates with the contact rod on the lower end rotating seat of the movable seat, when the groove roller rotates, the movable seat can make reciprocating linear motion on the rail, so that the high-temperature heater can uniformly heat the ball flat steel, avoid local overheating or insufficient heating, improve the quality and uniformity of heat treatment, at the same time, the reciprocating motion of the movable seat increases the coverage of heating, further improves the heating efficiency.

[0024] In addition, in the utility model, the flow divider is connected with the external nitrogen supply device, and nitrogen is delivered to the nozzle installed on the adjusting seat through the connecting pipe, which can spray nitrogen to the surface of the ball flat steel during the heat treatment process, nitrogen as an inert gas can form a protective gas curtain around the ball flat steel, effectively isolate oxygen, prevent the ball flat steel from oxidation reaction in the high-temperature heat treatment process, greatly improve the quality and service life of the ship ball flat steel. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below.

[0026] The drawings described in the following merely relate to some embodiments of the utility model, and are not limited to the utility model.

[0027] In the drawings:

[0028] Figure 1 A schematic diagram showing the overall structure of the present application is shown;

[0029] Figure 2 A schematic diagram showing the structure of the base plate portion of the present application is shown;

[0030] Figure 3 A schematic diagram showing the structure of the positioning member of the present application is shown;

[0031] Figure 4 A schematic diagram showing the structure of the Figure 2 portion of the present application is shown;

[0032] Figure 5 A schematic diagram showing the structure of the shell seat portion of the present application is shown;

[0033] Figure 6 A schematic diagram showing the structure of the Figure 2 portion of the present application is shown;

[0034] Figure 7 A schematic diagram showing the structure of the groove roller portion of the present application is shown;

[0035] Figure 8 A schematic diagram showing the structure of the movable seat portion of the present application is shown.

[0036] List of Reference Signs

[0037] 1, fixed frame; 11, support leg;

[0038] 2, base plate; 21, positioning member; 211, mounting frame; 212, rail frame; 213, first movable plate; 214, second movable plate; 2141, roller; 2142, connecting plate; 2143, positioning wheel; 215, hydraulic rod; 216, protective frame; 22, reinforcing rod; 23, top plate; 231, dehumidification fan; 24, transmission roller; 241, gearbox; 2411, No. 2 electric motor; 242, fixed rod; 243, shell seat; 2431, support arm; 2432, cover plate; 2433, adjusting screw; 25, frame; 251, sliding seat; 252, threaded seat; 2521, screw rod; 2522, hand wheel; 253, top roller; 26, sealing plate;

[0039] 3, mounting plate; 31, partition plate; 311, flow divider; 32, round rod; 321, adjusting seat; 322, spray head; 33, bearing seat; 331, rail rod; 332, groove roller; 34, movable seat; 341, rotating seat; 3411, contact rod; 35, high-temperature heater; 36, No. 1 electric motor. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of the present application.

[0041] Embodiment one: please refer to Figures 1 to 8

[0042] The utility model provides a kind of anti-oxidation heat treatment device for marine flat steel production, it include: fixed bracket 1;

[0043] The lower end of fixed bracket 1 is equipped with four groups of supporting feet 11, and the upper end of fixed bracket 1 is equipped with bottom plate 2 by bolt, and the front and rear ends of bottom plate 2 are both equipped with sealing plate 26 by bolt, and two groups of reinforcing rods 22 are installed between the two sealing plates 26 by bolt, and the top plate 23 is installed on the two groups of reinforcing rods 22 by bolt, and the dehumidification fan 231 is installed on the top plate 23 by bolt, and the left and right ends of bottom plate 2 are both equipped with positioning component 21, and two groups of bearing seats 33 are installed on bottom plate 2 by bolt, and two groups of rail rods 331 are fixed between the two groups of bearing seats 33, and movable seat 34 is movably arranged on the two groups of rail rods 331, and high-temperature heater 35 is installed on the upper end of movable seat 34 by bolt, and groove roller 332 is rotatably arranged between the two groups of bearing seats 33, and reciprocating spiral groove is arranged on the groove roller 332, and No. 1 motor 36 is installed on bottom plate 2 by bolt, and the output shaft of No. 1 motor 36 is connected with groove roller 332, and rotating seat 341 is installed on the lower end of movable seat 34 by pin shaft, and two groups of contact rods 3411 are installed on rotating seat 341, and the two groups of contact rods 3411 are movably arranged in reciprocating spiral groove on groove roller 332.

[0044] In the embodiments of the present disclosure,

[0045] ​The positioning component 21 comprises a mounting frame 211, rail frames 212, a first movable plate 213, a second movable plate 214, a hydraulic rod 215 and a protective frame 216, the mounting frame 211 is mounted on the bottom plate 2, the rail frames 212 are provided in two groups, the two groups of rail frames 212 are mounted on the mounting frame 211, the first movable plate 213 and the second movable plate 214 are movably arranged in the two groups of rail frames 212 respectively, the upper and lower ends of the first movable plate 213 and the second movable plate 214 are provided with rolling columns 2141, the hydraulic rod 215 is fixed at the lower end of the mounting frame 211, the protective frame 216 is provided in two groups and fixed at the front and rear ends of the mounting frame 211, a rotatable gear is mounted on the mounting frame 211, gear plates are fixed on the first movable plate 213 and the second movable plate 214, the gear plates on the first movable plate 213 and the second movable plate 214 are engaged with the gear on the mounting frame 211, a connecting plate 2142 is mounted on the second movable plate 214, the lower end of the connecting plate 2142 is connected with the piston rod of the hydraulic rod 215, positioning wheels 2143 are mounted on the first movable plate 213 and the second movable plate 214, and the positioning wheels 2143 are used for driving the second movable plate 214 through the hydraulic rod 215, achieving synchronous reverse movement of the first movable plate 213 and the second movable plate 214 through the engagement of the gear and the gear plate, and quickly and accurately positioning the ball flat steel of different sizes.

[0046] In the embodiments of the present disclosure,

[0047] The transmission roller 24 is mounted between the two groups of sealing plates 26 through bearings, the front end of the transmission roller 24 is fixed with a chain wheel, the sealing plate 26 close to the front end of the bottom plate 2 is provided with a gearbox 241 mounted through bolts, the output shaft of the gearbox 241 is fixed with a chain wheel, the gearbox 241 is provided with a No. 2 motor 2411 mounted through bolts, the sealing plate 26 close to the front end of the bottom plate 2 is fixed with a fixed rod 242, the fixed rod 242 is provided with a chain wheel mounted through bearings, three chain wheels are connected with a transmission chain, and the sealing plate 26 close to the front end of the bottom plate 2 is provided with a shell seat 243 mounted through bolts, the inside of the shell seat 243 is movably provided with a supporting arm 2431, the supporting arm 2431 is provided with a threaded hole, the supporting arm 2431 is provided with a chain wheel, the chain wheel on the supporting arm 2431 is tightly arranged on the transmission chain, the shell seat 243 is provided with a cover plate 2432 mounted through bolts, the cover plate 2432 is provided with an adjusting screw rod 2433 mounted through a lock ring, and the adjusting screw rod 2433 is screwed into the threaded hole on the supporting arm 2431, and the No. 2 motor 2411 is used as a power source, the transmission roller 24 is provided with adaptive power through the gearbox 241 changing the output rotating speed, so as to ensure that the ball flat steel can be transmitted at a suitable speed, the transmission structure composed of the three chain wheels and the transmission chain transmits power from the output shaft of the gearbox 241 to the transmission roller 24, so as to realize stable transportation of the ball flat steel between the two groups of sealing plates 26, and the position of the supporting arm 2431 is changed through rotating the adjusting screw rod 2433, so as to adjust the tension of the transmission chain.

[0048] Example two, on the basis of example one,

[0049] The inner wall of the two groups of sealing plates 26 is provided with a frame 25 through bolts, the two groups of frames 25 are movably provided with a sliding seat 251, the two groups of sliding seats 251 are provided with a top roller 253 through bearings, and the top plate 23 is provided with two groups of threaded seats 252 through bolts, the threaded seats 252 are screwed with a lead screw 2521, the upper end of the lead screw 2521 is provided with a hand wheel 2522, the lower end of the two groups of lead screws 2521 is connected with the two groups of sliding seats 251 through a lock ring, and the function is that: rotating the hand wheel 2522, the lead screw 2521 moves up and down in the threaded seat 252, the sliding seat 251 and the top roller 253 are driven by the lock ring to change the height, which can be flexibly adapted to different thickness of the ball flat steel, and prevent the ball flat steel from deviating or shaking in transmission.

[0050] Example three, on the basis of example one and example two,

[0051] The fixed frame 1 is provided with two groups of mounting plates 3 through bolts, the upper end of the two groups of mounting plates 3 is provided with a partition plate 31 through bolts, the partition plate 31 is provided with a flow divider 311 through bolts, the two groups of sealing plates 26 are fixed with two groups of round rods 32, the two groups of round rods 32 are provided with an adjusting seat 321 through bolts, the two groups of adjusting seats 321 are provided with a spray head 322, and the two groups of spray heads 322 are connected with the flow divider 311 through the connecting pipe, the flow divider 311 is connected with the external nitrogen gas supply equipment, and the function is that: the flow divider 311 is the key hub of the whole gas conveying link, which distributes the gas from the external nitrogen gas supply equipment, the spray head 322 is connected with the flow divider 311 through the connecting pipe, which can accurately spray nitrogen to the surface of the ball flat steel, and ensure that the nitrogen can evenly and accurately cover the surface of the ball flat steel during the heat treatment of the ball flat steel, effectively isolate oxygen and prevent oxidation reaction.

[0052] The working principle of the embodiment is as follows: when the marine bulb steel needs to be heat treated, first, the positioning component 21 is started, the second movable plate 214 is driven through the hydraulic rod 215, the synchronous reverse movement of the first movable plate 213 and the second movable plate 214 is realized by the meshing of the gear and the toothed plate, the bulb steel of different sizes can be quickly and accurately positioned, and the heat treatment link is prepared, the No. 1 motor 36 is powered on, the output shaft drives the groove roller 332 to rotate, the reciprocating spiral groove on the surface of the groove roller 332 interacts with the contact rod 3411 on the rotating seat 341, so that the movable seat 34 moves linearly on the rail 331, the high-temperature heater 35 installed on the upper end of the movable seat 34 moves reciprocally, the No. 2 motor 2411 is operated, the power is adjusted in speed through the gearbox 241, and then is transmitted to the transmission chain through the sprocket on the output shaft of the gearbox 241, the transmission chain drives the sprocket at the front end of the transmission roller 24, so that the transmission roller 24 rotates, the bulb steel is transmitted from the left side to the right side of the device under the action of the transmission roller 24, and the bulb steel is heated by the high-temperature heater 35, if the transmission chain is loose, the rotating adjusting screw 2433 can be rotated to move the supporting arm 2431, so as to adjust the tension of the transmission chain, and the stability of the bulb steel transmission is ensured, the external nitrogen supply equipment delivers nitrogen to the flow divider 311, the flow divider 311 distributes the nitrogen to the connecting pipe, and then delivers the nitrogen to the nozzle 322 installed on the adjusting seat 321 through the connecting pipe, the nozzle 322 sprays the nitrogen to the surface of the bulb steel, and forms a layer of inert gas protection gas curtain around the bulb steel, effectively isolates oxygen, and prevents the bulb steel from being oxidized in the high-temperature heat treatment process.

[0053] In this paper, the following points need attention:

[0054] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0055] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined to obtain new embodiments.

[0056] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure.

Claims

1. An anti-oxidation heat treatment device for the production of marine bulb steel, comprising: The utility model discloses a fixed frame (1), its characterized in that, The lower end of the fixed frame (1) is provided with four sets of supporting legs (11), the upper end of the fixed frame (1) is provided with a bottom plate (2), the front end and the rear end of the bottom plate (2) are provided with two sealing plates (26), two sets of reinforcing rods (22) are arranged between the two sealing plates (26), a top plate (23) is arranged on the two reinforcing rods (22), a dehumidification fan (231) is arranged on the top plate (23), the left end and the right end of the bottom plate (2) are provided with positioning components (21), two sets of bearing seats (33) are arranged on the bottom plate (2) through bolts, two sets of rail rods (331) are fixed between the two sets of bearing seats (33), a movable seat (34) is movably arranged on the two sets of rail rods (331), a high-temperature heater (35) is arranged on the upper end of the movable seat (34), a groove roller (332) is rotatably arranged between the two sets of bearing seats (33), the groove roller (332) is provided with a reciprocating spiral groove, and a first motor (36) is arranged on the bottom plate (2), the output shaft of the first motor (36) is connected with the groove roller (332), a rotating seat (341) is arranged on the lower end of the movable seat (34) through a pin shaft, two sets of contact rods (3411) are arranged on the rotating seat (341), and the two sets of contact rods (3411) are movably arranged in the reciprocating spiral groove of the groove roller (332).

2. The anti-oxidation heat treatment device for the production of marine ball flat steel according to claim 1, characterized in that, The positioning component (21) comprises a mounting frame (211), two rail frames (212), a first movable plate (213), a second movable plate (214), a hydraulic rod (215) and two protective frames (216), the mounting frame (211) is arranged on the bottom plate (2), the two rail frames (212) are arranged on the mounting frame (211), the first movable plate (213) and the second movable plate (214) are movably arranged in the two rail frames (212), the upper end and the lower end of the first movable plate (213) and the second movable plate (214) are provided with rollers (2141), the hydraulic rod (215) is fixed on the lower end of the mounting frame (211), and the two protective frames (216) are fixed on the front end and the rear end of the mounting frame (211).

3. The anti-oxidation heat treatment device for the production of marine ball flat steel according to claim 2, characterized in that, The mounting frame (211) is provided with a rotatable gear, the first movable plate (213) and the second movable plate (214) are provided with tooth plates, the tooth plates of the first movable plate (213) and the second movable plate (214) are engaged with the gear of the mounting frame (211), the second movable plate (214) is provided with a connecting plate (2142), the lower end of the connecting plate (2142) is connected with the piston rod of the hydraulic rod (215), and the first movable plate (213) and the second movable plate (214) are provided with positioning wheels (2143).

4. The anti-oxidation heat treatment device for the production of marine ball flat steel according to claim 1, characterized in that, Transmission rollers (24) are installed between the two groups of the sealing plates (26) through bearings, the front end of the transmission roller (24) is fixed with a chain wheel, the sealing plate (26) near the front end of the bottom plate (2) is installed with a gearbox (241), the output shaft of the gearbox (241) is fixed with a chain wheel, the gearbox (241) is installed with a No. 2 motor (2411).

5. The anti-oxidation heat treatment device for the production of marine flat bulb steel according to claim 4, wherein, The sealing plate (26) near the front end of the bottom plate (2) is fixed with a fixed rod (242), the fixed rod (242) is installed with a chain wheel through a bearing, the three groups of chain wheels are connected with transmission chains, and the sealing plate (26) near the front end of the bottom plate (2) is installed with a shell seat (243), the inside of the shell seat (243) is movably provided with a supporting arm (2431), and the supporting arm (2431) is provided with a threaded hole.

6. The anti-oxidation heat treatment device for the production of marine flat bulb steel according to claim 5, wherein, The supporting arm (2431) is installed with a chain wheel, the chain wheel on the supporting arm (2431) is tightly pressed on the transmission chain, the shell seat (243) is installed with a cover plate (2432), the cover plate (2432) is installed with an adjusting screw rod (2433) through a lock ring, and the adjusting screw rod (2433) is screwed into the threaded hole in the supporting arm (2431).

7. The anti-oxidation heat treatment device for the production of marine flat bulb steel according to claim 5, wherein, Two groups of the frame (25) are installed on the inner walls of the two groups of the sealing plates (26), two groups of sliding seats (251) are movably arranged on the two groups of the frame (25), a top roller (253) is installed between the two groups of the sliding seats (251) through bearings, two groups of threaded seats (252) are installed on the top plate (23), threaded rods (2521) are screwed into the threaded seats (252), hand wheels (2522) are installed on the upper ends of the threaded rods (2521), and the lower ends of the two groups of the threaded rods (2521) are connected with the two groups of the sliding seats (251) through lock rings.

8. The anti-oxidation heat treatment device for the production of marine flat bulb steel according to claim 1, wherein, Two groups of mounting plates (3) are installed on the fixed frame (1), a partition plate (31) is installed on the upper ends of the two groups of the mounting plates (3), a flow divider (311) is installed on the partition plate (31), two groups of round rods (32) are fixed between the two groups of the sealing plates (26), two groups of adjusting seats (321) are installed on the two groups of the round rods (32), two groups of nozzles (322) are installed on the two groups of the adjusting seats (321), the two groups of the nozzles (322) are connected with the flow divider (311) through connecting pipes, and the flow divider (311) is connected with an external nitrogen supply device.

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