Tin bath with tin flow circulation blind pass at tail end bath bottom

Abstract

The utility model discloses a tin bath with a tin flow circulation blind pass at the tail end bath bottom, and belongs to the technical field of float glass manufacturing. The tin bath comprises a tin liquor pool and small lug pools, one end of an inlet of the tin liquor pool is connected with the melting furnace, one end of an outlet of the tin liquor pool is connected with the annealing furnace, the tin liquor pool comprises a tin liquor pool bottom, an end wall and side walls, linear motors are installed in the small lug pools on the two sides, and the inlets of the small lug pools are open and communicated with tin liquor in the tin liquor pool; the small lug pool outlets are submerged outlets located in the tin liquid pool bottom, a blind pass is arranged in the tin liquid pool bottom, blind pass inlets are communicated with the small lug pool outlets in the two sides respectively, and blind pass outlets are located near the central area close to the end wall of the tin bath outlet; according to the utility model, a tin flow circulating channel is formed by arranging the blind pass at the bottom of the tank and tin liquid at the outlet end wall of the tin tank, and controlled tin liquid flow pushed by the linear motor is guided to the middle area of the tail end of the tin tank through the circulating blind pass, so that the tin liquid in the middle area flows to two sides, and the tin ash cleaning effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of float glass manufacturing, in particular to a tin bath with a tin flow circulation dark channel at the bottom of the tail end bath. Background Art

[0002] Tin bath is an important equipment in float glass manufacturing technology. The inlet end of the tin bath is connected to the melting furnace, and the outlet end of the tin bath is connected to the annealing furnace. The conventional tin bath body is a rectangular space composed of the tin bath molten pool bottom and side walls. The tin bath body contains molten tin, and the glass ribbon floats on the molten tin as a floating medium. The lower surface of the glass ribbon is in contact with the molten tin. The purity of the molten tin has a great influence on the quality of the glass, especially the end wall triangle area at the outlet of the tin bath is prone to accumulation of tin ash.

[0003] When the float glass ribbon in the narrow section of the tin bath is pulled forward by the roller, it will drive the tin liquid under the glass ribbon to flow to the outlet of the tin bath. When it flows to the outlet of the tin bath and hits the lip brick end wall, the tin liquid sinks and flows back upstream. The tin ash in the middle area cannot flow to the edge. The tin ash accumulates in the triangle area under the glass plate, which is easy to cause defects such as glass tin staining, affecting the glass production and quality. In actual operation, workers are required to regularly extend a long flat wooden strip or a packing steel strip from both sides of the tin bath, and pull the wooden strip and steel strip to drive the tin liquid and tin ash to flow to the edge, and then be attracted into the small ear pool by the linear motor or collected into the large ear pool by the rotating wheel. Obviously, this manual method is inefficient and ineffective. It can only partially reduce the number of tin defects under the glass ribbon, and it will bring in additional pollution. In addition, some cleaning devices have been proposed.

[0004] The utility model application with the publication number CN219670354U discloses a device that uses a blowpipe to blow the tin ash in the middle area to both sides, attempting to solve the problem of the tin ash in the middle not flowing. This method adds a blowpipe in a narrow space, which greatly increases the risk of the glass ribbon touching foreign objects and causing surface scratches or even broken boards. The invention application with the publication number CN117623594A discloses a combination of a linear motor and a small ear pool, where a linear motor is installed on each ear pool, and the electromagnetic force is used to attract the tin liquid and the floating tin ash into the small ear pool, and the clean tin liquid is returned to the tin tank after filtering. This method has a limited range of action because the tin liquid flows in a short-circuit cycle, and can only attract the tin ash within about 1 meter of the side wall of the tin tank into the small ear pool, while the width of the tin tank is usually more than 5 meters, so at least 3 meters in the middle is outside its range of action. The electromagnetic force of the linear motor cannot attract the tin ash in the triangular area below the glass belt at the center of the tin tank, and must rely on the natural tin flow to bring the tin ash in the middle to the edge. In addition, there is a large-ear pool mechanical slag scraper, which uses a graphite wheel to collect tin ash into the large-ear pool. This method has a smaller range of action and is more dependent on the natural tin liquid flow. The utility model application with publication number CN218478675U discloses a device for removing tin ash with a second linear motor. The second linear motor of the utility model has a large mechanical structure and occupies the space that must be left empty at the tail of the tin bath, which will bring great risks. This space is an emergency station for handling glass strip breakage accidents. It is as important as the fire escape and should not be occupied. The utility model application with publication number CN206799422U discloses a method of setting a guide plate at the end of the tin bath, with the purpose of diverting the natural tin liquid flow flowing through the guide plate from the middle to both sides, but because the float glass production technology has developed into wide plates and slow speeds, the natural tin flow is particularly weak, and it can be said that there is almost no flow to divert. In addition, there is a short-circuit cycle between the inlet and outlet of the traditional small ear pools on both sides, which can promote the cleaning of tin ash near the side wall to a certain extent. However, in this scheme, the short-circuit cycle between the inlet and outlet of the small ear pool is blocked by the guide plate, and the clean tin liquid flowing out of the small ear pool is forced to flow back upstream, affecting the cleaning effect of the tin ash near the side wall. More importantly, this method also cannot solve the problem of cleaning tin ash near the center of the wide tin tank. The utility model application with publication number CN218841940U discloses another method of trying to guide the natural tin liquid flow to the edge, hoping to improve the working effect of the large ear pool mechanical slag scraper, but as mentioned above, the natural tin flow is already very weak and will not produce a tin liquid flow sufficient to guide the tin ash to the edge, and there is almost no flow to guide. And according to the design of the ear pools on both sides, this large ear pool does not have a tin liquid circulation loop, but only uses a graphite runner to collect the tin ash floating on the surface of the tin liquid at the edge.

[0005] How to clean the tin ash near the center of a wide tin bath without adding additional equipment or instruments is an urgent problem to be solved in this field. Utility Model Content

[0006] In order to overcome the above problems, the utility model is based on a new idea and provides a tin bath with a tin flow circulation dark channel at the bottom of the tail end bath. A tin flow circulation channel is formed with the tin liquid at the outlet end wall of the tin bath by arranging a dark channel at the bottom of the bath. The controlled tin liquid flow driven by the linear motor is guided to the middle area of ​​the tail end of the tin bath by the circulation dark channel, so that the tin liquid in the middle area flows to both sides, thereby enhancing the tin ash cleaning effect.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A tin bath with a rear end bottom having a tin flow circulation blind channel, the tin bath comprising a tin liquid pool and a small ear pool, one end of the tin liquid pool inlet is connected to a melting furnace, and one end of the tin liquid pool outlet is connected to an annealing furnace, the tin liquid pool comprising a tin liquid pool bottom, an end wall and a side wall, the small ear pool is arranged at the side walls on both sides of the tin bath outlet, a linear motor is installed in the small ear pool, the small ear pool inlet is open and connected to the tin liquid in the tin liquid pool; the small ear pool outlet adopts a sunken outlet located inside the tin liquid pool bottom, a blind channel is provided inside the tin liquid pool bottom, the blind channel inlet is respectively connected to the small ear pool outlets on both sides, and the blind channel outlet is located near the central area of ​​the tin bath outlet end wall; the controlled tin liquid flow gushing upward from the blind channel drives the tin liquid containing tin ash at the tin bath outlet end wall to flow to the small ear pool at the side.

[0009] Preferably, the number of the blind channels is 2, a pair of blind channels are symmetrical about the central axis of the tin liquid pool along the length direction, and each blind channel is arranged along the side wall and the end wall.

[0010] Preferably, the blind passage is a bifurcated structure, including two branch passages and a confluence passage, the entrances of the two branch passages are respectively connected to the outlets of the small ear pools on both sides, the outlets of the two branch passages are both connected to the entrance of the confluence passage, and the outlet of the confluence passage is connected to the tin liquid in the tin liquid pool.

[0011] Preferably, the confluence channel is arranged along the central axis of the tin liquid pool in the length direction, and the confluence channel outlet is located near the central area close to the outlet end wall of the tin bath.

[0012] Preferably, the tin liquid in the dark channel is separated from the tin liquid in the tin liquid pool by a dark channel top plate, and a liquid outlet is opened near the central area of ​​the dark channel top plate near the tin bath outlet end wall, and the liquid outlet is the dark channel outlet.

[0013] Preferably, the material density of the blind channel top plate is lower than that of the tin liquid, and is preferably a refractory material, and more preferably a graphite material.

[0014] Preferably, the top of the blind passage is an open dovetail structure, which matches the structure of the blind passage roof; the blind passage roof floats on the top of the blind passage under the action of buoyancy, and is engaged with the dovetail structure at the top of the blind passage.

[0015] Preferably, the top plate of the dark channel is flush with the bottom of the tin liquid pool.

[0016] Preferably, the thrust directions of the linear motors in the small ear pools on both sides are consistent, and the thrust direction is opposite to the moving direction of the glass ribbon, from downstream to upstream.

[0017] The beneficial effects of the utility model are as follows: the utility model forms a tin flow circulation channel with the tin liquid at the end wall of the tin tank outlet by arranging a secret passage at the bottom of the tank, so as to guide the controlled tin liquid flow after filtering in the ear pools on both sides from the edge to the vicinity of the central axis of the tin liquid tank, and then flows out from the center position of the end wall of the tin tank outlet from bottom to top, thereby driving the tin liquid containing tin ash to automatically flow to the edge, thereby enhancing the tin ash cleaning effect near the center position of the wide tin tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the first embodiment of the tin bath with a tin flow circulation dark channel at the bottom of the tail end shown in the embodiment of the utility model;

[0019] Figure 2 is a cross-sectional view along the line AA in the first embodiment;

[0020] Figure 3 It is a BB-direction cross-sectional view of the first embodiment;

[0021] Figure 4 This is the second embodiment of the tin bath with a tin flow circulation dark channel at the bottom of the tail end shown in the embodiment of the utility model;

[0022] Figure 5 is a CC sectional view of the second embodiment;

[0023] Figure 6 is a DD-direction cross-sectional view of the second embodiment;

[0024] Figure 7 This is the third embodiment of the tin bath with a tin flow circulation dark channel at the bottom of the tail end shown in the embodiment of the utility model;

[0025] Figure 8 is a cross-sectional view along the line EE in the third embodiment;

[0026] Fig. 9 is a sectional view in the direction of FF in the third embodiment;

[0027] In the figure: 1-tin liquid pool, 2-small ear pool, 3-end wall, 4-side wall, 5-linear motor, 6-blind channel, 7-blind channel entrance, 8-blind channel exit, 9-branch channel, 10-convergence channel, 11-blind channel top plate, 12-glass belt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides a tin bath with a tin flow circulation dark channel at the bottom of the tail end of the bath, the tin bath comprises a tin liquid pool 1 and a small ear pool 2, one end of the inlet of the tin liquid pool 1 is connected to the melting furnace, one end of the outlet of the tin liquid pool 1 is connected to the annealing furnace, the tin liquid pool 1 comprises a tin liquid pool bottom, an end wall 3 and a side wall 4, the small ear pool 2 is arranged at the side walls 4 on both sides of the tin bath outlet, a linear motor 5 is installed in the small ear pool 2, the inlet of the small ear pool 2 is open and communicates with the tin liquid in the tin liquid pool 1; the outlet of the small ear pool 2 adopts a sunken outlet located inside the tin liquid pool bottom, a dark channel 6 is arranged inside the tin liquid pool bottom, the dark channel entrance 7 is respectively connected to the outlets of the small ear pools 2 on both sides, and the dark channel outlet 8 is located near the central area of ​​the end wall 3 near the tin bath outlet; the controlled tin liquid flow gushing upward from the dark channel 6 drives the tin liquid containing tin ash at the end wall 3 of the tin bath outlet to flow to the small ear pool 2 at the edge. The utility model forms a tin flow circulation channel with the tin liquid at the tin tank outlet end wall 3 by arranging a dark channel 6 at the bottom of the tank, so as to guide the controlled tin liquid flow after filtering in the ear pools on both sides from the edge to the vicinity of the central axis of the tin liquid tank 1, and then gush out from the central position of the tin tank outlet end wall 3 from bottom to top, driving the tin liquid containing tin ash to automatically flow to the edge, thereby enhancing the tin ash cleaning effect near the central position of the wide tin tank.

[0030] like Figure 1-3As shown, the utility model provides a first implementation of a tin bath having a tin flow circulation dark channel at the bottom of the tail end. In this embodiment, the dark channel 6 is a bifurcated structure, including two branch channels 9 and a confluence channel 10. The inlets of the two branch channels 9 are respectively connected to the outlets of the small ear pools 2 on both sides, and the outlets of the two branch channels 9 are both connected to the inlet of the confluence channel 10. The outlet of the confluence channel 10 is connected to the tin liquid in the tin liquid pool 1. Taking the direction in the figure as an example, one end of the small ear pool 2 located near the end wall 3 (downstream) of the tin bath outlet serves as the small ear pool inlet, and one end of the small ear pool 2 near the upstream serves as the small ear pool outlet. The configuration of a pair of small ear pools 2 is the same, and the thrust direction of the linear motors 5 in the small ear pools 2 on both sides remains consistent, and the thrust direction is from downstream to upstream. The dark passage 6 between the outlets of a pair of small ear pools 2 is composed of two branch channels 9 and a confluence channel 10. The confluence channel 10 connects the branch channel 9 and the central area of ​​the outlet end wall 3. The confluence channel 10 is arranged along the central axis of the tin liquid pool 1 in the length direction, and the outlet of the confluence channel 10 is located near the central area of ​​the outlet end wall 3 of the tin bath. The tin liquid flowing from the upper small ear pool 2 into the upper branch channel 9 and the tin liquid flowing from the lower small ear pool 2 into the lower branch channel 9 merge at the entrance of the confluence channel 10. After encountering the end wall of the tin bath in the confluence channel 10, it flows upward from the outlet and merges with the tin liquid in the large pool, driving the tin liquid containing tin ash to automatically flow to the edge, and is again attracted by the linear motor 5 into the small ear pools 2 on both sides, so that the tin liquid flow streams continuously flow from the middle to both sides. Upstream and downstream here refer to the direction of glass movement from upstream to downstream.

[0031] Since the outlet of the small ear pool 2 adopts a submerged outlet design, the tin liquid flows into the small ear pool 2 under the drive of the circulating liquid and the action of the linear motor 5. The temperature of the tin liquid decreases when flowing through the small ear pool 2 and the density is relatively large. The tin ash floating above the tin liquid is intercepted at the submerged outlet and can be manually cleared regularly or a channel can be set to automatically flow into the tin ash collection pool. The clean tin liquid near the bottom flows into the dark channel 6 from the outlet of the small ear pool 2 and flows back to the tin liquid pool 1 under the action of the circulation passage.

[0032] like Figure 4 As shown, the utility model provides a second implementation of a tin trough with a tin flow circulation dark channel at the bottom of the tail end. Different from the first implementation, the dark channel 6 is not directly obtained by processing a reserved channel at the bottom of the tin liquid pool in an integrated manner, but the tin liquid in the dark channel 6 is separated from the tin liquid in the tin liquid pool 1 by a dark channel top plate 11, and a liquid outlet is opened in the middle of the dark channel top plate 11 close to the outlet end wall 3, and the opened liquid outlet is the dark channel outlet 8. In this embodiment, the material of the dark channel top plate 11 is a refractory material or a graphite material, such as Figure 5-6As shown, the top of the blind channel 6 is an open dovetail structure, which matches the structure of the blind channel top plate 11. Since the plate density of the blind channel top plate 11 is lighter than the tin liquid, the blind channel top plate 11 floats on the top of the tin liquid in the blind channel 6 and is engaged with the dovetail structure on the top of the blind channel 6 to form a closed channel. The blind channel top plate 11 is flush with the bottom of the tin liquid pool, and the blind channel top plate 11 does not affect the natural flow of the tin liquid caused by the movement of the glass ribbon 12.

[0033] like Figure 7 As shown, the utility model provides a third implementation of a tin bath with a tin flow circulation dark channel at the bottom of the tail end. In this embodiment, the number of dark channels 6 is 2, and a pair of dark channels 6 are symmetrical about the central axis of the tin liquid pool 1 along the length direction, and each dark channel 6 is arranged along the side wall and the end wall. Taking the direction in the figure as an example, one end of the small ear pool 2 located near the end wall 3 (downstream) of the tin bath outlet serves as the small ear pool entrance, and one end of the small ear pool 2 near the upstream serves as the small ear pool outlet. The pair of small ear pools 2 are arranged in the same manner, and the thrust directions of the linear motors 5 in the small ear pools 2 on both sides are kept consistent, and the thrust directions are all from downstream to upstream. The tin liquid flowing from the upper small ear pool 2 into the dark channel 6 flows through the upper dark channel 6, and the tin liquid flowing from the lower small ear pool 2 into the dark channel 6 flows through the lower dark channel 6. The two dark channels 6 share a dark channel outlet 8, which is located in the central area near the tin tank outlet end wall 3. The tin liquid in the dark channel 6 flows out from the bottom and merges with the tin liquid in the tin liquid pool, driving the tin liquid containing tin ash to automatically flow to the edge and enter the small ear pools 2 on both sides again. Figure 8-9 As shown, similar to the second implementation, the tin liquid in the dark channel 6 is separated from the tin liquid in the tin liquid pool 1 by the dark channel top plate 11, and a liquid outlet is opened in the middle of the dark channel top plate 11 close to the tin bath outlet end wall 3, and the opened liquid outlet is the dark channel outlet 8. In this embodiment, the material of the dark channel top plate 11 is a refractory material or a graphite material, and the top of the dark channel 6 is an open dovetail structure, which matches the structure of the dark channel top plate 11. Since the plate density of the dark channel top plate 11 is lighter than the tin liquid, the dark channel top plate 11 floats on the top of the tin liquid in the dark channel 6 and is engaged with the dovetail structure at the top of the dark channel 6 to form a dark channel channel. The dark channel top plate 11 is flush with the bottom of the tin liquid pool, and the dark channel top plate 11 does not affect the natural flow of tin liquid. In this embodiment, the dark channel form arranged along the tin bath pool wall can facilitate the maintenance or replacement of damaged dark channel top plates 11 without stopping production.

[0034] The above-mentioned tin bath works in the same way, by controlling the linear motor 5 in a pair of small ear pools 2 to work in the thrust direction from downstream to upstream, the tin liquid flows into the small ear pool 2, is filtered and flows through the dark channel 6, and finally flows out from the center position of the tin bath outlet end wall 3 from bottom to top, driving the tin liquid containing tin ash to automatically flow to the edge, thereby enhancing the tin ash cleaning effect near the center position of the wide tin bath. The layout of the dark channel 6 is not limited, and in addition to the layout given in the embodiment, it can also be other ways.

[0035] The above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A tin bath with a tin flow circulation dark channel at the bottom of the tail end, the tin bath comprising a tin liquid pool (1) and a small ear pool (2), the inlet end of the tin liquid pool (1) is connected to a melting furnace, and the outlet end of the tin liquid pool (1) is connected to an annealing furnace, the tin liquid pool (1) comprises a tin liquid pool bottom, an end wall (3) and a side wall (4), characterized in that: The small ear pool (2) is arranged at the side walls (4) on both sides of the tin bath outlet, a linear motor (5) is installed in the small ear pool (2), the entrance of the small ear pool (2) is open and connected to the tin liquid in the tin liquid pool (1); the outlet of the small ear pool (2) adopts a sunken outlet located inside the bottom of the tin liquid pool, a dark channel (6) is arranged inside the bottom of the tin liquid pool, the entrance of the dark channel (7) is connected to the outlets of the small ear pools (2) on both sides respectively, and the dark channel outlet (8) is located near the central area of ​​the end wall (3) of the tin bath outlet; the controlled tin liquid flow gushing upward from the dark channel drives the tin liquid with tin ash floating on the end wall (3) of the tin bath outlet to flow to the small ear pool (2) at the side.

2. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 1, characterized in that: The number of the dark channels (6) is 2, a pair of dark channels (6) are symmetrical about the central axis of the tin liquid pool (1) along the length direction, and each dark channel (6) is arranged along the side wall and the end wall.

3. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 1, characterized in that: The dark channel (6) is a bifurcated structure, comprising two branch channels (9) and a confluence channel (10), the entrances of the two branch channels (9) are respectively connected to the exits of the small ear pools (2) on both sides, the exits of the two branch channels (9) are both connected to the entrance of the confluence channel (10), and the exit of the confluence channel (10) is connected to the tin liquid in the tin liquid pool (1).

4. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 3, characterized in that: The confluence channel (10) is arranged along the central axis of the tin liquid pool (1) in the length direction, and the outlet of the confluence channel (10) is located near the central area of ​​the tin bath outlet end wall (3).

5. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 1, characterized in that: The tin liquid in the dark channel (6) is separated from the tin liquid in the tin liquid pool (1) by a dark channel top plate (11), and a liquid outlet is provided on the dark channel top plate (11) near the central area of ​​the tin bath outlet end wall (3), and the liquid outlet is the dark channel outlet (8).

6. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 5, characterized in that: The material of the dark passage top plate (11) is refractory material.

7. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 5, characterized in that: The top of the dark passage (6) is an open dovetail structure, which matches the structure of the dark passage top plate (11); the dark passage top plate (11) floats on the top of the dark passage (6) under the action of buoyancy, and is engaged with the dovetail structure at the top of the dark passage (6).

8. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 5, characterized in that: The top plate (11) of the dark channel is flush with the bottom of the tin liquid pool.

9. The tin bath with a tin flow circulation dark channel at the bottom of the tail end of claim 1, characterized in that: The thrust directions of the linear motors (5) in the small ear pools (2) on both sides are consistent, and the thrust direction is opposite to the moving direction of the glass ribbon.

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