Protective gas exhaust device for float tin bath and mounting method

Abstract

Disclosed in the present invention are a protective gas exhaust device for a float tin bath and a mounting method. The protective gas exhaust device comprises a horizontal exhaust pipe and a vertical exhaust pipe. The horizontal exhaust pipe comprises a first horizontal exhaust pipe and a second horizontal exhaust pipe which are coaxial and are communicated with each other. The left end of the first horizontal exhaust pipe is detachably and sealedly connected to an outer side surface of a float tin bath and is communicated with an exhaust channel of the float tin bath; the right end of the first horizontal exhaust pipe is fixedly connected to the left end of the second horizontal exhaust pipe by means of a gate valve; and the exhaust flow amount is adjusted by means of the gate valve. The second horizontal exhaust pipe is supported on a stand, a port of the right end of the second horizontal exhaust pipe is sealed by means of a sealing plug, and the right end is detachably and sealedly connected to the sealing plug. The lower end of the vertical exhaust pipe is detachably and sealedly connected to a top surface of the second horizontal exhaust pipe and is communicated with the second horizontal exhaust pipe. In the present invention, the service position of the protective gas exhaust device on the float tin bath can be conveniently changed, and substances adhered to pipe walls of the horizontal exhaust pipe and the vertical exhaust pipe can be conveniently cleaned.

Description

A protective gas exhaust device and installation method for float tin bath Technical Field

[0001] This invention belongs to the technical field of float glass production equipment, specifically relating to a protective gas exhaust device and installation method for float glass tin baths. Background Technology

[0002] The float glass forming process involves continuously feeding molten glass from a furnace into a tin bath filled with molten tin at a temperature of approximately 1100°C, and forming the glass sheet from the molten glass on the surface of the tin bath. Therefore, the tin bath is a key thermal equipment in float glass forming. As shown in Figure 1, the tin bath is vertically divided into three parts: the lower part is a pool 1 containing molten tin 4, the upper part is a sealed top cover 2, and a gap is left between the pool 1 and the top cover 2 to form an internal space 3. This gap can serve as a channel for auxiliary forming equipment to enter and exit the tin bath. To ensure the sealing and heat preservation of the tin bath, the gaps on both sides of the tin bath need to be filled and sealed by side seals 5.

[0003] To reduce the oxidation of molten tin, forming impurities such as tin oxide, a nitrogen-hydrogen mixture is continuously introduced into the tin bath to create a positive-pressure reducing atmosphere within the bath, serving as a protective gas. However, due to operational issues such as opening the side seals or sealing the tin bath during production, some molten tin still oxidizes, forming impurities like tin oxide. Some of these impurities volatilize into the atmosphere within the bath. If these volatilized substances condense and accumulate on the brick surface of the top cover or on the forming auxiliary equipment entering the tin bath, they will form drips that fall onto the molten glass, severely affecting glass quality. Furthermore, the boron compounds in borosilicate glass are highly volatile, and their volatiles are highly corrosive to the top cover bricks, breast wall bricks, forming auxiliary equipment entering the tin bath, and side seals exposed within the bath. Therefore, an exhaust system is needed to remove the volatilized substances along with the protective gas from the tin bath, purifying the atmosphere. Due to the high pressure within the bath and the chimney-like structure of the exhaust system, the high-temperature protective gas will spontaneously and continuously escape from the tin bath after installation. When the protective gas passes through the exhaust device, the volatiles condense and accumulate inside the device, forming ash. This ash needs to be cleaned regularly. If there is a lot of volatiles, the cleaning frequency will increase accordingly. Moreover, some volatiles will adhere to the pipe wall of the exhaust device. If it is not cleaned for a long time, it will affect the exhaust passage. As shown in Figure 1, the current exhaust device 6 has a simple structure, which is an integrated structure and is welded and fixed to the side seal or breast wall of the tin bath. It mainly consists of a horizontal exhaust pipe, the end flange of the horizontal exhaust pipe, the flange cover, the vertical exhaust pipe, and the heat insulation layer. After installation, it is extremely difficult to change the usage position or disassemble it. The flange cover can only be opened from the end flange to clean the end dust in the horizontal exhaust pipe. The adhering substances on the pipe walls of the horizontal and vertical exhaust pipes are difficult to clean, making cleaning and maintenance operations inconvenient.

[0004] Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention provides a protective gas exhaust device and installation method for float tin bath, which can easily change the usage position of the protective gas exhaust device on the float tin bath, and can easily clean the pipe wall of the horizontal exhaust pipe and the vertical exhaust pipe of the adhering material.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A protective gas exhaust device for a float tin bath includes a horizontal exhaust pipe and a vertical exhaust pipe. The horizontal exhaust pipe includes a first horizontal exhaust pipe and a second horizontal exhaust pipe whose axes coincide and are connected. The left end of the first horizontal exhaust pipe is detachably and sealed to the outer side of the float tin bath and communicates with the exhaust channel of the float tin bath. The right end of the first horizontal exhaust pipe is fixedly connected to the left end of the second horizontal exhaust pipe through a gate valve, and the exhaust flow rate is adjusted by the gate valve. The second horizontal exhaust pipe is supported on a bracket, and its right end is sealed with a sealing plug and detachably and sealed to the sealing plug. The lower end of the vertical exhaust pipe is detachably and sealed to the top surface of the second horizontal exhaust pipe and communicates with the second horizontal exhaust pipe.

[0008] Furthermore, one end of the first horizontal exhaust pipe is detachably and sealingly connected to the outer side of the matching side seal of the float tin bath and communicates with the exhaust channel of the matching side seal; or one end of the first horizontal exhaust pipe is detachably and sealingly connected to the outer side of the breast wall brick of the float tin bath and communicates with the exhaust channel on the breast wall brick.

[0009] Furthermore, when the first horizontal exhaust pipe is connected to the matching side seal located at the gap on the right side of the tin bath, the matching side seal includes an inner shell, an outer shell, and an exhaust channel. The inner shell is located at the gap on the right side of the tin bath, and the outer shell is located outside the tin bath. The exhaust channel penetrates both the inner and outer shells. The inner shell is a cuboid with an opening at the right end, and exhaust holes are provided on its top, bottom, front, and rear side plates. An internal exhaust hole is provided on the left side plate of the inner shell. The outer shell includes an outer shell body plate and an outer perimeter plate arranged around the right edge of the outer shell body plate. The right end of the inner shell is continuously welded to the left side of the outer shell body plate, and an external exhaust hole is provided on the outer shell body plate. The left end of the exhaust channel extends into the internal exhaust hole and is continuously welded to the left side plate of the inner shell. The right end of the exhaust channel extends into the external exhaust hole and is continuously welded to the outer shell body plate. The gap between the exhaust channel and the inner shell is filled with thermal insulation material.

[0010] Furthermore, the left end of the first horizontal exhaust pipe is continuously welded to the right side of the side sealing plate. The side sealing plate has an exhaust hole corresponding to the opening of the first horizontal exhaust pipe. The left side of the side sealing plate is continuously welded to the right end of the side sealing embedded tube. The axis of the side sealing embedded tube coincides with the axis of the first horizontal exhaust pipe and its shape and structure are adapted to the shape and structure of the exhaust channel. The side sealing embedded tube is inserted into the exhaust channel from the right end of the exhaust channel. The side sealing plate seals the outer edge of the exhaust channel and fits against the right side of the outer shell body plate. The front and rear sides of the first horizontal exhaust pipe are also provided with buckles that fit against the right side of the side sealing plate. The right side of the outer shell body plate is provided with buckle supports at positions corresponding to the two buckles. Each buckle is snapped onto the corresponding buckle support.

[0011] Furthermore, the latch support is a latching rod arranged horizontally in the left-right direction. The left end of the latching rod is welded to the right side of the outer shell body plate, and the lower right part is welded to the upper end of the handle. The lower end of the handle is welded to the lower outer peripheral plate. The latch is a latching plate arranged vertically in the front-back direction. The lower part of the latching plate has a latching groove that matches the latching rod. The latching plate is latched onto the latching rod through the latching groove. The latching rod has a latching hole that runs vertically through the latching plate on the right side. A latching pin is installed in the latching hole to prevent the latching plate from moving to the right.

[0012] Further, the slide gate valve includes a valve body, a valve vane, and a valve vane locking element; the valve body includes a first valve body plate and a second valve body plate that are parallel to each other. The left side of the first valve body plate is continuously welded to the right end of the first horizontal exhaust pipe, and a first valve body exhaust hole is opened on the first valve body plate at the position corresponding to the pipe opening of the first horizontal exhaust pipe. The right side of the second valve body plate is continuously welded to the left end of the second horizontal exhaust pipe, and a second valve body exhaust hole is opened on the second valve body plate at the position corresponding to the pipe opening of the second horizontal exhaust pipe. A first valve body frame is provided around the right edge of the first valve body plate, and a second valve body frame is provided around the left edge of the second valve body plate. The right end of the first valve body frame and the left end of the second valve body frame are continuously welded together, so that a sealed cavity is formed between the first valve body plate and the second valve body plate; the valve vane includes a valve vane plate and a T-shaped adjusting handle. The valve vane plate is placed in the cavity, and the lower end of the vertical rod of the adjusting handle is welded to the upper end of the valve vane plate. The valve leaf locking component includes a nut welded to the right side of the second valve body plate. The second valve body plate has a through hole that runs horizontally through the nut at a position corresponding to the nut. A bolt is screwed onto the nut. The valve leaf plate can be moved up and down by adjusting the handle to completely block the first valve body exhaust hole and the second valve body exhaust hole, or partially block the first valve body exhaust hole and the second valve body exhaust hole, or completely block the first valve body exhaust hole and the second valve body exhaust hole, or completely pass over the first valve body exhaust hole and the second valve body exhaust hole to achieve complete passage between the first valve body exhaust hole and the second valve body exhaust hole. The valve leaf plate is adjusted to the correct position, and the bolt passes through the through hole into the cavity and abuts against the valve leaf plate or the vertical rod.

[0013] Furthermore, the right end of the second horizontal exhaust pipe is continuously welded to the left side of the end plate, and an end plate hole is provided on the end plate corresponding to the pipe opening position of the second horizontal exhaust pipe; the sealing plug includes a shell, an end plate, and a handle. The shell is a cuboid with openings at both ends, and multiple exhaust holes are provided on the shell. The right end of the shell is continuously welded to the left side of the end plate, and the handle is welded to the right side of the end plate. The shell is filled with thermal insulation material. The shell is inserted into the second horizontal exhaust pipe through the end plate hole, and the end plate seals the outer edge of the end plate hole and fits against the right side of the end plate; if the protective gas exhaust device is not connected to the matching side seal, the sealing plug is inserted into the exhaust channel and seals the exhaust channel.

[0014] Furthermore, an exhaust pipe hole is formed on the top surface of the second horizontal exhaust pipe, and the edge of the exhaust pipe hole is continuously welded to the lower surface of the lower end plate. A lower end plate exhaust hole is formed on the lower end plate at the position corresponding to the exhaust pipe hole. The upper surface of the lower end plate is continuously welded to the lower end of the vertical pipe embedding tube at the edge of the lower end plate exhaust hole. The vertical pipe embedding tube is adapted to the vertical exhaust pipe. The lower end of the vertical exhaust pipe is continuously welded to the upper surface of the upper end plate. An upper end plate exhaust hole is formed on the upper end plate at the position corresponding to the pipe opening of the vertical exhaust pipe. The lower part of the vertical exhaust pipe is sleeved outside the vertical pipe embedding tube. The upper end plate and the lower end plate are in contact. The upper end of the vertical exhaust pipe is welded to the dust collection hood through multiple connecting rods. The bracket includes a base plate, a support rod, and a support plate. The upper surface of the base plate is welded to the lower end of the support rod. The upper end of the support rod is welded to the lower surface of the support plate. The support plate is C-shaped, and the lower right part of the second horizontal exhaust pipe is clamped and supported on the support plate.

[0015] Furthermore, the first horizontal exhaust pipe, the second horizontal exhaust pipe, and the vertical exhaust pipe are all covered with a heat insulation layer; a sealing plate is welded around the right edge of the end plate, and the gap between the sealing plate and the end plate is filled with heat insulation material.

[0016] A method for installing a protective gas exhaust device for a float tin bath includes the following steps:

[0017] S1. Install the matching edge seal at the right gap of the tin bath;

[0018] S2. Remove the sealing plug inserted into the exhaust channel;

[0019] S3. Place the bracket to the lower right of the second horizontal exhaust pipe and lift the second horizontal exhaust pipe.

[0020] S4. The left end of the first horizontal exhaust pipe is detachably and sealed to the right side of the side seal housing and connected to the exhaust channel.

[0021] S5. Insert the sealing plug into the right end of the second horizontal exhaust pipe;

[0022] S6. The lower end of the vertical exhaust pipe is detachably and sealed to the top surface of the second horizontal exhaust pipe and communicates with the second horizontal exhaust pipe.

[0023] S7. Adjust the exhaust flow rate from the first horizontal exhaust pipe to the second horizontal exhaust pipe through the gate valve, and then lock the gate valve after adjustment.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The protective gas exhaust device for float tin bath in this invention includes a horizontal exhaust pipe and a vertical exhaust pipe. The horizontal exhaust pipe includes a first horizontal exhaust pipe and a second horizontal exhaust pipe with coincident and connected axes. The left end of the first horizontal exhaust pipe is detachably and sealed to the outer side of the float tin bath and communicates with the exhaust channel of the float tin bath. The right end of the first horizontal exhaust pipe is fixedly connected to the left end of the second horizontal exhaust pipe through a slide valve, and the exhaust flow rate is adjusted through the slide valve. The second horizontal exhaust pipe is supported on a bracket, and its right end is sealed with a sealing plug and detachably and sealed to the sealing plug. The lower end of the vertical exhaust pipe is detachably and sealed to the top surface of the second horizontal exhaust pipe and communicates with the second horizontal exhaust pipe. Because the left end of the first horizontal exhaust pipe in this protective gas exhaust device is detachably connected to the float tin bath, the right end of the second horizontal exhaust pipe is detachably connected to the sealing plug, and the lower end of the vertical exhaust pipe is detachably connected to the second horizontal exhaust pipe, it is convenient to disassemble and install the protective gas exhaust device if the exhaust position of the float tin bath, i.e., the usage position of the protective gas exhaust device on the float tin bath, needs to be changed. Moreover, when the slide valve is closed and the sealing plug is removed from the right end of the second horizontal exhaust pipe, the dust accumulated at the end of the second horizontal exhaust pipe can be cleaned. The operation is safe and simple. In addition, the slide valve can adjust and control the exhaust flow rate. Furthermore, the vertical exhaust pipe and the horizontal exhaust pipe can be disassembled separately, which is convenient for cleaning the pipe wall deposits inside the horizontal exhaust pipe and the vertical exhaust pipe. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the structure of the existing protective gas exhaust device for float tin bath in the background art, which is installed on the side seal of the float tin bath.

[0027] Figure 2 is a three-dimensional structural diagram of the protective gas exhaust device for float tin bath and its matching side seal in this invention.

[0028] Figure 3 is a three-dimensional structural diagram of the matching side seal in this invention;

[0029] Figure 4 is a three-dimensional structural diagram of the horizontal exhaust pipe after the heat insulation layer is hidden in this invention;

[0030] Figure 5 is a schematic diagram of the three-dimensional structure of Figure 4 from another direction;

[0031] Figure 6 is a three-dimensional structural diagram of the first valve body plate hidden in Figure 5;

[0032] Figure 7 is a three-dimensional structural diagram of the vertical exhaust pipe in this invention;

[0033] Figure 8 is a three-dimensional structural diagram of the bracket in this invention;

[0034] Figure 9 is a three-dimensional structural diagram of the sealing plug in this invention;

[0035] Figure 10 is a three-dimensional structural diagram of the locking pin in this invention.

[0036] Figure reference numerals: 1. Tank, 2. Top cover, 3. Tank interior space, 4. Molten solder, 5. Side seal, 6. Exhaust device, 701. First horizontal exhaust pipe, 702. Second horizontal exhaust pipe, 703. Side seal plate, 704. Side seal embedded pipe, 705. Clip, 70501. Clip groove, 70601. First valve body plate, 70602. Second valve body plate, 7060201. Second valve body frame, 70603. Valve leaf plate, 70604. Adjusting handle, 70605. Nut, 70606. Bolt, 70607. First valve body frame, 70608. Second valve body frame, 7 7. End plate; 708. Edge sealing plate; 709. Lower end plate; 7010. Vertical pipe embedded pipe; 801. Side sealing inner shell; 80201. Outer shell body plate; 80202. Outer plate; 803. Exhaust channel; 804. Snap fastener; 80401. Snap hole; 805. Handle; 9. Snap pin; 1001. Shell; 1002. End plug plate; 1003. Handle; 11. Exhaust hole; 1201. Vertical exhaust pipe; 1202. Upper end plate; 1203. Connecting rod; 1204. Dust collection hood; 1301. Base plate; 1302. Support rod; 1303. Support plate; 14. Insulation layer. Detailed Implementation

[0037] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0038] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] As shown in Figure 2, a protective gas exhaust device for a float tin bath includes a horizontal exhaust pipe and a vertical exhaust pipe 1201. The horizontal exhaust pipe includes a first horizontal exhaust pipe 701 and a second horizontal exhaust pipe 702 whose axes coincide and are connected. The left end of the first horizontal exhaust pipe 701 is detachably and sealed to the outer side of the float tin bath and communicates with the exhaust channel 803 of the float tin bath. The right end of the first horizontal exhaust pipe 701 is fixedly connected to the left end of the second horizontal exhaust pipe 702 through a slide valve, and the exhaust flow rate is adjusted through the slide valve. The second horizontal exhaust pipe 702 is supported on a bracket, and its right end is sealed with a sealing plug and detachably and sealed to the sealing plug. The lower end of the vertical exhaust pipe 1201 is detachably and sealed to the top surface of the second horizontal exhaust pipe 702 and communicates with the second horizontal exhaust pipe 702.

[0042] Because the left end of the first horizontal exhaust pipe 701 in this protective gas exhaust device is detachably connected to the float tin bath, the right end of the second horizontal exhaust pipe 702 is detachably connected to the sealing plug, and the lower end of the vertical exhaust pipe 1201 is detachably connected to the second horizontal exhaust pipe 702, it is convenient to disassemble and install the protective gas exhaust device if the exhaust position of the float tin bath, i.e., the usage position of the protective gas exhaust device on the float tin bath, needs to be changed. Moreover, when the slide valve is closed and the sealing plug is removed from the right end of the second horizontal exhaust pipe 702, the dust accumulated at the end of the second horizontal exhaust pipe 702 can be cleaned, making the operation safe and simple. In addition, the slide valve can adjust and control the exhaust flow rate. Furthermore, the vertical exhaust pipe 1201 and the horizontal exhaust pipe can be disassembled separately, making it convenient to clean the pipe wall deposits inside the horizontal exhaust pipe and the vertical exhaust pipe 1201.

[0043] The first horizontal exhaust pipe 701 is detachably and sealed at one end to the outer side of the matching side seal of the float tin bath and communicates with the exhaust channel 803 of the matching side seal; or the first horizontal exhaust pipe 701 is detachably and sealed at one end to the outer side of the breast wall brick of the float tin bath and communicates with the exhaust channel 803 on the breast wall brick.

[0044] When the first horizontal exhaust pipe 701 is connected to the matching side seal located at the gap on the right side of the tin bath, as shown in Figure 3, the matching side seal includes an inner side seal shell 801, an outer side seal shell, and an exhaust channel 803. The inner side seal shell 801 is located at the gap on the right side of the tin bath, and the outer side seal shell is located outside the tin bath. The exhaust channel 803 penetrates both the inner side seal shell 801 and the outer side seal shell. The inner side seal shell 801 is a cuboid with an opening at the right end, and exhaust holes 11 are provided on the top plate, bottom plate, front side plate, and rear side plate of the inner side seal shell 801. The exhaust holes 11 can prevent the matching side seal from deforming due to temperature changes. An internal exhaust hole is provided on the left side plate of the inner side seal shell 801. Preferably, the inner side seal shell 801 is made of 2mm thick stainless steel plate, and preferably, the diameter of the exhaust hole 11 is 3mm. The outer side seal shell... The device includes an outer shell body plate 80201 and an outer peripheral plate 80202 disposed around the right edge of the outer shell body plate 80201. The right end of the inner shell 801 is continuously welded to the left side of the outer shell body plate 80201. The outer shell body plate 80201 is provided with an external exhaust hole. Preferably, the outer shell is made of 3mm thick stainless steel plate. The left end of the exhaust channel 803 extends into the internal exhaust hole and is continuously welded to the left side plate of the inner shell 801. The right end of the exhaust channel 803 extends into the external exhaust hole and is continuously welded to the outer shell body plate 80201. Preferably, the exhaust channel 803 is cuboid in shape. The gap between the exhaust channel 803 and the inner shell 801 is filled with thermal insulation material. Preferably, the thermal insulation material is an alumina fiber blanket.

[0045] In one embodiment,

[0046] As shown in Figures 4-6, the left end of the first horizontal exhaust pipe 701 is continuously welded to the right side of the side sealing plate 703. The side sealing plate 703 has exhaust holes corresponding to the opening of the first horizontal exhaust pipe 701. The left side of the side sealing plate 703 is continuously welded to the right end of the side sealing embedded pipe 704. The axis of the side sealing embedded pipe 704 coincides with the axis of the first horizontal exhaust pipe 701, and its shape and structure are adapted to the shape and structure of the exhaust channel 803. The side sealing embedded pipe 704 extends from the exhaust channel 803... The right end is inserted into the exhaust channel 803. The side sealing plate 703 seals the outer edge of the exhaust channel 803 and fits against the right side of the outer shell body plate 80201. The front and rear sides of the first horizontal exhaust pipe 701 are also provided with buckles 705 that fit against the right side of the side sealing plate 703, as shown in Figure 3. On the right side of the outer shell body plate 80201, at positions corresponding to the two buckles 705, buckle supports 804 are provided, with each buckle 705 snapping onto the corresponding buckle support 804. The side sealing embedded pipe 704, the first horizontal exhaust pipe 701, and the second horizontal exhaust pipe 702 are all made of 3mm thick rectangular stainless steel pipes. The side sealing plate 703 is made of 3mm thick stainless steel plate. The buckles 705 are made of 10mm thick stainless steel plate.

[0047] Preferably, as shown in Figure 3, the snap-fit ​​support 804 is a snap-fit ​​rod arranged horizontally in the left-right direction. The snap-fit ​​rod is made of round steel with a diameter of 30mm. The left end of the snap-fit ​​rod is welded to the right side of the outer shell plate 80201 and the lower right part is welded to the upper end of the handle 805. The lower end of the handle 805 is welded to the lower outer peripheral plate 80202. The handle 805 is made of round steel with a diameter of 16mm. As shown in Figures 4-6, the snap-fit ​​705 is a snap-fit ​​plate arranged vertically in the front-back direction. The lower part of the snap-fit ​​plate has a snap-fit ​​groove 70501 that matches the snap-fit ​​rod. The snap-fit ​​plate is snapped onto the snap-fit ​​rod through the snap-fit ​​groove 70501. The snap-fit ​​rod has a snap-fit ​​hole 80401 that runs vertically through the snap-fit ​​plate on the right side. A snap-fit ​​pin 9 is snapped into the snap-fit ​​hole 80401 to prevent the snap-fit ​​plate from moving to the right. The snap-fit ​​pin 9 is made of 10mm thick steel plate in a wedge shape, as shown in Figure 10.

[0048] In one embodiment, as shown in Figures 4-6, the slide gate valve includes a valve body, a valve vane, and a valve vane locking element. The valve body includes a first valve body plate 70601 and a second valve body plate 70602 that are parallel to each other. The left side of the first valve body plate 70601 is continuously welded to the right end of the first horizontal exhaust pipe 701. A first valve body exhaust hole is provided on the first valve body plate 70601 at the position corresponding to the pipe opening of the first horizontal exhaust pipe 701. The right side of the second valve body plate 70602 is continuously welded to the left end of the second horizontal exhaust pipe 702. A first valve body exhaust hole is provided on the second valve body plate 70602 at the position corresponding to the second horizontal exhaust pipe 702. A second valve body vent hole is provided at the pipe opening of pipe 702. A first valve body frame 70607 is provided around the right edge of the first valve body plate 70601, and a second valve body frame 70608 is provided around the left edge of the second valve body plate 70602. The right end of the first valve body frame 70607 and the left end of the second valve body frame 70608 are continuously welded together, forming a sealed cavity between the first valve body plate 70601 and the second valve body plate 70602. The valve vane includes a valve vane plate 70603 and a T-shaped adjusting handle 70604. The valve vane plate 70603 is placed... Inside the cavity, the lower end of the vertical rod of the adjusting handle 70604 is welded to the upper end of the valve vane plate 70603 and extends from the upper end of the cavity to the outside of the cavity; the valve vane locking component includes a nut 70605 welded to the right side of the second valve body plate 70602, and a through hole is provided on the second valve body plate 70602 at a position corresponding to the nut 70605. A bolt 70606 is screwed onto the nut 70605. The valve vane plate 70603 is moved up and down by adjusting the handle 70604 to be completely positioned between the exhaust holes of the first valve body and the exhaust holes of the second valve body. Between the first valve body exhaust hole and the second valve body exhaust hole, complete sealing is achieved, or it is partially placed between the first valve body exhaust hole and the second valve body exhaust hole to achieve partial sealing, or it is completely placed above the first valve body exhaust hole and the second valve body exhaust hole to achieve complete passage between the first valve body exhaust hole and the second valve body exhaust hole. The vertical position of the valve vane plate 70603 is adjusted to the correct position, and the bolt 70606 passes through the through hole, extends into the cavity, and abuts against the valve vane plate 70603 or the vertical rod. The first valve body plate 70601 and the second valve body plate 70602 are both made of 5mm thick stainless steel plate. The valve vane plate 70603 is made of 2mm thick stainless steel plate.

[0049] When it is necessary to adjust and control the exhaust flow, loosen the bolt 70606 of the slide gate valve, lift the valve leaf plate 70603 to the required valve opening through the adjusting handle 70604, and then tighten the bolt 70606 to fix it, thus completing the adjustment and control of the exhaust flow.

[0050] In one embodiment,

[0051] As shown in Figures 4-6, the right end of the second horizontal exhaust pipe 702 is continuously welded to the left side of the end plate 707. The end plate 707 has an end plate hole corresponding to the opening position of the second horizontal exhaust pipe 702. The end plate 707 is made of 3mm thick stainless steel plate. As shown in Figure 9, the sealing plug includes a housing 1001, an end plate 1002, and a handle 1003. The housing 1001 is a cuboid with openings at both ends. The housing 1001 has multiple exhaust holes 11 with a diameter of 3mm. The right end of the housing 1001 is continuously welded to the left side of the end plate 1002. The handle 1001... 3. Welded to the right side of the end plate 1002, the housing 1001 is filled with thermal insulation material. The housing 1001 is inserted into the second horizontal exhaust pipe 702 through the end plate hole. The end plate 707 seals the outer edge of the end plate hole and fits against the right side of the end plate 707. The housing 1001 is made of 2mm thick stainless steel plate, the end plate 1002 is made of 2mm thick stainless steel plate, and the handle 1003 is made of 6mm diameter round steel. If the protective gas exhaust device is not connected to the matching side seal, the sealing plug is inserted into the exhaust channel 803 and seals the exhaust channel 803.

[0052] Preferably, the first horizontal exhaust pipe 701, the second horizontal exhaust pipe 702, and the vertical exhaust pipe 1201 are all covered with a heat insulation layer 14, as shown in Figure 7. The heat insulation layer 14 is made of aluminum silicate fiber blanket, and the outside of the aluminum silicate fiber blanket is covered with a color steel plate. As shown in Figures 4-6, a sealing plate 708 is welded around the right edge of the end plate 707. The gap between the sealing plate 708 and the end plate 1002 is filled with heat insulation material. The sealing plate 708 is cylindrical and 2mm thick, and is made of stainless steel. The heat insulation material is aluminum silicate fiber blanket.

[0053] In one embodiment, as shown in Figures 4-6, an exhaust pipe hole is formed on the top surface of the second horizontal exhaust pipe 702, and the edge of the exhaust pipe hole is continuously welded to the lower surface of the lower end plate 709. A lower end plate exhaust hole is formed on the lower end plate 709 at a position corresponding to the exhaust pipe hole. The upper surface of the lower end plate 709 is continuously welded to the lower end of the vertical pipe embedding tube 7010 around the edge of the lower end plate exhaust hole. The vertical pipe embedding tube 7010 is adapted to the vertical exhaust pipe 1201, wherein the vertical... The embedded tube 7010 is made of 3mm thick stainless steel round tube, and the lower end plate 709 is made of 3mm thick stainless steel plate. As shown in Figure 7, the lower end of the vertical exhaust pipe 1201 is continuously welded to the upper surface of the upper end plate 1202. An exhaust hole is provided on the upper end plate 1202 corresponding to the pipe opening of the vertical exhaust pipe 1201. The lower part of the vertical exhaust pipe 1201 is fitted over the embedded tube 7010. The upper end plate 1202 is in contact with the lower end plate 709. 01 The upper end is welded to the dust collection hood 1204 via multiple connecting rods 1203. The upper end plate 1202 is made of 3mm thick stainless steel plate, and both the upper end plate 1202 and the lower end plate 709 are annular in shape with equal outer diameters. The vertical exhaust pipe 1201 is made of 2mm thick stainless steel pipe. The dust collection hood 1204 is conical in shape with a thickness of 2mm and is made of stainless steel. The connecting rods 1203 are made of 6mm diameter round steel. As shown in Figure 8, the bracket package... The system includes a base plate 1301, a support rod 1302, and a support plate 1303. The upper surface of the base plate 1301 is welded to the lower end of the support rod 1302, and the upper end of the support rod 1302 is welded to the lower surface of the support plate 1303. The support plate 1303 is C-shaped, and the lower right part of the second horizontal exhaust pipe 702 is clamped and supported on the support plate 1303. The support plate 1303 is made of 5mm thick stainless steel plate, the support rod 1302 is made of steel pipe, and the base plate 1301 is made of 5mm thick stainless steel plate.

[0054] A method for installing a protective gas exhaust device for a float tin bath includes the following steps:

[0055] S1. Install the matching edge seal at the right gap of the tin bath;

[0056] S2. Remove the sealing plug inserted into the exhaust channel 803 of the matching side seal;

[0057] S3. Place the bracket to the lower right of the second horizontal exhaust pipe 702 and lift the second horizontal exhaust pipe 702.

[0058] S4. Insert the side seal embedding pipe 704 on the left side of the first horizontal exhaust pipe 701 into the exhaust channel 803 of the matching side seal until the side seal blocking plate 703 at the left end of the first horizontal exhaust pipe 701 is in contact with the right side of the outer shell body plate 80201 of the side seal shell, and make the buckles 705 on both sides of the first horizontal exhaust pipe 701 respectively snapped onto the corresponding buckle supports 804 of the matching side seal.

[0059] S5. Insert the sealing plug into the right end of the second horizontal exhaust pipe 702, so that the end plate 1002 of the sealing plug fits against the end plate 707 at the right end of the second horizontal exhaust pipe 702.

[0060] S6. Insert each locking pin 9 into the locking hole 80401 above the corresponding locking support 804;

[0061] S7. The lower part of the vertical exhaust pipe 1201 is sleeved on the outside of the vertical pipe embedded pipe 7010 on the second horizontal exhaust pipe 702, so that the upper end plate 1202 at the lower end of the vertical exhaust pipe 1201 is in contact with the lower end plate 709 on the second horizontal exhaust pipe 702.

[0062] S8. Loosen the bolt 70606 of the slide gate valve, lift the valve leaf plate 70603 to the required valve opening by adjusting the handle 70604, and then tighten the bolt 70606 to fix it, thus completing the adjustment and control of the exhaust flow.

[0063] In summary, the horizontal and vertical exhaust pipes in this protective gas exhaust device are detachably connected. The first horizontal exhaust pipe 701 in the horizontal exhaust pipe is detachably connected to the float tin bath, and the right end of the second horizontal exhaust pipe 702 in the horizontal exhaust pipe is detachably connected to the sealing plug. This makes it convenient to disassemble and install the protective gas exhaust device if the exhaust position of the float tin bath needs to be changed, i.e., the usage position of the protective gas exhaust device on the float tin bath. Furthermore, when the slide valve is closed and the sealing plug is removed from the right end of the second horizontal exhaust pipe 702, the accumulated dust at the end of the second horizontal exhaust pipe 702 can be cleaned, making operation safe and simple. In addition, the slide valve can adjust and control the exhaust flow rate. Moreover, the vertical exhaust pipe 1201 and the horizontal exhaust pipe can be disassembled separately, making it convenient to clean the pipe wall deposits inside the horizontal exhaust pipe and the vertical exhaust pipe 1201. If the protective gas exhaust device is not needed, it can be removed from the matching side seal, and the sealing plug can be inserted into the exhaust channel 803 to seal the exhaust channel 803, so that the matching side seal can be used as an operating side seal.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A protective gas exhaust device for float tin baths, characterized in that: The system includes a horizontal exhaust pipe and a vertical exhaust pipe (1201). The horizontal exhaust pipe includes a first horizontal exhaust pipe (701) and a second horizontal exhaust pipe (702) whose axes coincide and are connected. The left end of the first horizontal exhaust pipe (701) is detachably and sealed to the outer side of the float tin bath and communicates with the exhaust channel (803) of the float tin bath. The right end of the first horizontal exhaust pipe (701) is fixedly connected to the left end of the second horizontal exhaust pipe (702) through a slide valve, and the exhaust flow rate is adjusted through the slide valve. The second horizontal exhaust pipe (702) is supported on a bracket and its right end is sealed with a sealing plug and detachably and sealed to the sealing plug. The lower end of the vertical exhaust pipe (1201) is detachably and sealed to the top surface of the second horizontal exhaust pipe (702) and communicates with the second horizontal exhaust pipe (702).

2. The protective gas exhaust device for a float tin bath according to claim 1, characterized in that: One end of the first horizontal exhaust pipe (701) is detachably and sealed to the outer side of the matching side seal of the float tin bath and communicates with the exhaust channel (803) of the matching side seal; or one end of the first horizontal exhaust pipe (701) is detachably and sealed to the outer side of the breast wall brick of the float tin bath and communicates with the exhaust channel (803) on the breast wall brick.

3. The protective gas exhaust device for a float tin bath according to claim 2, characterized in that: When the first horizontal exhaust pipe (701) is connected to the matching side seal located at the gap on the right side of the tin bath, the matching side seal includes a side seal inner shell (801), a side seal outer shell, and an exhaust channel (803). The side seal inner shell (801) is located at the gap on the right side of the tin bath, and the side seal outer shell is located outside the tin bath. The exhaust channel (803) penetrates the side seal inner shell (801) and the side seal outer shell. The side seal inner shell (801) is a cuboid with an opening at the right end, and exhaust holes (11) are provided on the top plate, bottom plate (1301), front side plate, and rear side plate of the side seal inner shell (801). An internal exhaust hole is provided on the left side plate of the side seal inner shell (801). The side seal outer shell includes an outer shell. The outer body plate (80201) and the outer peripheral plate (80202) are arranged around the right edge of the outer body plate (80201). The right end of the side sealing inner shell (801) is continuously welded to the left side of the outer body plate (80201). The outer body plate (80201) is provided with an external exhaust hole. The left end of the shell of the exhaust channel (803) extends into the internal exhaust hole and is continuously welded to the left side plate of the side sealing inner shell (801). The right end of the shell of the exhaust channel (803) extends into the external exhaust hole and is continuously welded to the outer body plate (80201). The gap between the exhaust channel (803) and the side sealing inner shell (801) is filled with thermal insulation material.

4. The protective gas exhaust device for a float tin bath according to claim 3, characterized in that: The left end of the first horizontal exhaust pipe (701) is continuously welded to the right side of the side sealing plate (703). The side sealing plate (703) has an exhaust hole corresponding to the opening of the first horizontal exhaust pipe (701). The left side of the side sealing plate (703) is continuously welded to the right end of the side sealing embedded pipe (704). The axis of the side sealing embedded pipe (704) coincides with the axis of the first horizontal exhaust pipe (701), and its shape and structure are adapted to the shape and structure of the exhaust channel (803). The side sealing embedded pipe (704) extends from the right side of the exhaust channel (803). The end is inserted into the exhaust channel (803). The side sealing plate (703) blocks the outer edge of the exhaust channel (803) and fits against the right side of the outer shell body plate (80201). The front and rear sides of the first horizontal exhaust pipe (701) are also provided with buckles (705) that fit against the right side of the side sealing plate (703). On the right side of the outer shell body plate (80201), buckle supports (804) are provided at positions corresponding to the two buckles (705). Each buckle (705) is snapped onto the corresponding buckle support (804).

5. The protective gas exhaust device for a float tin bath according to claim 4, characterized in that: The buckle support (804) is a horizontally arranged buckling rod in the left-right direction. The left end of the buckling rod is welded to the right side of the outer shell body plate (80201) and the lower right part is welded to the upper end of the handle (805). The lower end of the handle (805) is welded to the lower outer peripheral plate (80202). The buckle (705) is a vertically arranged buckling plate in the front-back direction. The lower part of the buckling plate has a buckling groove (70501) that matches the buckling rod. The buckling plate is buckled onto the buckling rod through the buckling groove (70501). The buckling rod has a vertically penetrating buckling hole (80401) on the right side of the buckling plate. A buckling pin (9) is buckled in the buckling hole (80401) to prevent the buckling plate from moving to the right.

6. The protective gas exhaust device for a float tin bath according to claim 3, characterized in that: The slide gate valve includes a valve body, a valve vane, and a valve vane locking element. The valve body includes a first valve body plate (70601) and a second valve body plate (70602) that are parallel to each other. The left side of the first valve body plate (70601) is continuously welded to the right end of the first horizontal exhaust pipe (701). A first valve body exhaust hole is opened on the first valve body plate (70601) at the position corresponding to the pipe opening of the first horizontal exhaust pipe (701). The right side of the second valve body plate (70602) is continuously welded to the left end of the second horizontal exhaust pipe (702). A first valve body exhaust hole is opened on the second valve body plate (70602) at the position corresponding to the pipe opening of the second horizontal exhaust pipe (702). The valve body is provided with a second valve body vent hole. A first valve body frame (70607) is provided around the right edge of the first valve body plate (70601), and a second valve body frame (70608) is provided around the left edge of the second valve body plate (70602). The right end of the first valve body frame (70607) and the left end of the second valve body frame (70608) are continuously welded together, so that the first valve body plate (70601) and the second valve body plate (70602) form a sealed cavity. The valve blade includes a valve blade plate (70603) and a T-shaped adjusting handle (70604). The valve blade plate (70603) is placed in the cavity. Inside, the lower end of the vertical rod of the adjusting handle (70604) is welded to the upper end of the valve leaf plate (70603) and extends from the upper end of the cavity to the outside of the cavity; the valve leaf locking component includes a nut (70605) welded to the right side of the second valve body plate (70602), and a through hole is provided on the second valve body plate (70602) at a position corresponding to the nut (70605). A bolt (70606) is screwed onto the nut (70605). The valve leaf plate (70603) is moved up and down by the adjusting handle (70604) to be completely positioned between the exhaust hole of the first valve body and the second valve leaf plate. Between the exhaust holes of the valve body, the first valve body exhaust hole and the second valve body exhaust hole are completely blocked, or partially placed between the first valve body exhaust hole and the second valve body exhaust hole to partially block the first valve body exhaust hole and the second valve body exhaust hole, or completely placed on the first valve body exhaust hole and the second valve body exhaust hole to achieve complete passage between the first valve body exhaust hole and the second valve body exhaust hole. The upper and lower positions of the valve blade plate (70603) are adjusted to the correct position, and the bolt (70606) passes through the through hole, extends into the cavity, and abuts against the valve blade plate (70603) or the vertical rod.

7. The protective gas exhaust device for a float tin bath according to claim 3, characterized in that: The right end of the second horizontal exhaust pipe (702) is continuously welded to the left side of the end plate (707). The end plate (707) has an end plate hole corresponding to the pipe opening position of the second horizontal exhaust pipe (702). The sealing plug includes a housing (1001), an end plate (1002), and a handle (1003). The housing (1001) is a cuboid with openings at both ends. The housing (1001) has multiple exhaust holes (11). The right end of the housing (1001) is connected to the end plate (1002). The left side is continuously welded, and the handle (1003) is welded to the right side of the end plate (1002). The housing (1001) is filled with thermal insulation material. The housing (1001) is inserted into the second horizontal exhaust pipe (702) through the end plate hole. The end plate (707) seals the outer edge of the end plate hole and fits against the right side of the end plate (707). If the protective gas exhaust device is not connected to the matching side seal, the sealing plug is inserted into the exhaust channel (803) and seals the exhaust channel (803).

8. The protective gas exhaust device for a float tin bath according to claim 3, characterized in that: The second horizontal exhaust pipe (702) has an exhaust pipe hole on its top surface, and is continuously welded to the lower surface of the lower end plate (709) around the edge of the exhaust pipe hole. The lower end plate (709) has a lower end plate exhaust hole corresponding to the exhaust pipe hole. The upper surface of the lower end plate (709) is continuously welded to the lower end of the vertical pipe embedding pipe (7010) around the edge of the lower end plate exhaust hole. The vertical pipe embedding pipe (7010) is adapted to the vertical exhaust pipe (1201). The lower end of the vertical exhaust pipe (1201) is continuously welded to the upper surface of the upper end plate (1202). The upper end plate (1202) has an upper end plate exhaust hole corresponding to the pipe opening of the vertical exhaust pipe (1201). The vertical exhaust pipe (1201) is fitted outside the vertical pipe embedding pipe (7010) at the bottom. The upper end plate (1202) is attached to the lower end plate (709). The upper end of the vertical exhaust pipe (1201) is welded to the dust collection hood (1204) through multiple connecting rods (1203). The bracket includes a base plate (1301), a support rod (1302) and a support plate (1303). The upper surface of the base plate (1301) is welded to the lower end of the support rod (1302). The upper end of the support rod (1302) is welded to the lower surface of the support plate (1303). The support plate (1303) is C-shaped and the lower right part of the second horizontal exhaust pipe (702) is clamped and supported on the support plate (1303).

9. A protective gas exhaust device for a float tin bath according to claim 7, characterized in that: The first horizontal exhaust pipe (701), the second horizontal exhaust pipe (702) and the vertical exhaust pipe (1201) are all covered with a heat insulation layer (14); a sealing plate (708) is welded around the right edge of the end plate (707), and the gap between the sealing plate (708) and the end plate (1002) is filled with heat insulation material.

10. The installation method of the protective gas exhaust device for float tin bath according to any one of claims 3-9, characterized in that, Includes the following steps: S1. Install the matching edge seal at the right gap of the tin bath; S2. Remove the sealing plug inserted in the exhaust channel (803); S3. Place the bracket to the lower right of the second horizontal exhaust pipe (702) and lift the second horizontal exhaust pipe (702); S4. The left end of the first horizontal exhaust pipe (701) is detachably and sealed to the right side of the side seal housing and connected to the exhaust channel (803); S5. Insert the sealing plug into the right end of the second horizontal exhaust pipe (702); S6. The lower end of the vertical exhaust pipe (1201) is detachably and sealed to the top surface of the second horizontal exhaust pipe (702) and communicates with the second horizontal exhaust pipe (702); S7. Adjust the exhaust flow rate from the first horizontal exhaust pipe (701) to the second horizontal exhaust pipe (702) through the gate valve, and then lock the gate valve after adjustment.

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