Baffle ridge device for removing tin slag and tin bath thereof

Abstract

The utility model discloses a blocking ridge device for removing tin slag and a tin bath of the blocking ridge device, and belongs to the technical field of float glass manufacturing. The blocking ridge device is applied to the outlet end of the float glass tin bath and comprises a blocking ridge structure installed between a small lug pool inlet and a small lug pool outlet on the two sides of the outlet end of the tin bath, the blocking ridge structure comprises two single-edge blocking ridges, the single-edge blocking ridges are fixed to the bottom of the tin bath, one end of each single-edge blocking ridge is connected with the side wall of the tin bath between the small lug pool inlet and the small lug pool outlet, and the other end of each single-edge blocking ridge is connected with the other end of each single-edge blocking ridge. And each pair of blocking ridge structures is symmetrical about the central axis of the tin bath in the length direction, and an opening is reserved in the central axis area of the tin bath. The short-circuit circulating tin flow near the small lug pool is weakened through the baffle ridge structure mounted between the inlet and the outlet of the small lug pool on the two sides of the outlet end of the tin bath, the circulating tin flow is forced to flow towards the opening in the middle of the baffle ridge to form wide-path circulation, and the tin ash cleaning effect near the center position of the wide tin bath is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of float glass manufacturing, in particular to a ridge device for removing tin slag and a tin trough thereof. 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 triangular area of ​​the tin bath outlet end wall is prone to accumulation of tin ash.

[0003] The utility model application with publication number CN206799422U discloses a method of setting a guide plate at the end of the tin bath, the purpose of which is to guide the natural tin liquid flow flowing through the guide plate from the middle to both sides. The power of the natural tin liquid flow is the movement of the glass strip. Since the pulling speed of glass thicker than 5 mm is very slow, the natural tin flow flowing through the middle guide plate is already very weak, and it can be said that there is almost no flow to guide. Although ear pools are set on both sides, a linear motor is installed on each ear pool, and its electromagnetic force is used to attract the tin liquid and floating tin ash into the small ear pool, but with the development of float glass production technology towards wide plates (usually more than 5 meters), the tin slag generated in the middle is far away from the edge, and the thrust of the linear motor is not enough to attract the tin slag in the middle to flow to the edge. The main reason for this phenomenon is that the circulating tin flow between the inlet and outlet of the small ear pool follows the shortest path principle, resulting in the range of action being limited to the edge of the tin bath.

[0004] 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. However, as mentioned above, the natural tin flow is already very weak and does not produce a tin liquid flow sufficient to guide the tin ash to the edge. 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 wheel to collect the tin ash floating on the surface of the tin liquid at the edge. Utility Model Content

[0005] In order to overcome the above problems, the utility model proposes a barrier device for removing tin slag and a tin trough thereof, which weakens the short-circuit circulating tin flow near the small ear pool by installing a barrier structure between the inlet and outlet of the small ear pool on both sides of the outlet end of the tin pool, and forces the circulating tin flow to flow toward the middle opening of the barrier to form a wide-circuit circulation, thereby enhancing the tin ash cleaning effect near the center of the wide tin trough.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A sill device for removing tin slag is applied to the outlet end of a float glass tin bath, comprising sill structures installed between a small lug pool inlet and a small lug pool outlet on both sides of the tin bath outlet end, each pair of sill structures comprising two single-sided sills, the single-sided sills being fixed on the bottom of the tin bath, one end of which is connected to a tin bath side wall between the small lug pool inlet and the small lug pool outlet, and the other end of which is open toward the central axis of the tin bath, each pair of sill structures is symmetrical about the central axis of the tin bath along the length direction, and an opening is left in the central axis area of ​​the tin bath.

[0008] Preferably, the barrier is located at any position between the entrance and exit of the small ear pool, and the angle formed by the barrier and the direction of glass movement is not limited; it is further preferred that the single-sided barrier is at a right angle to the downstream tin bath side wall, and it is further preferred that it is an acute angle.

[0009] Preferably, the length of the single-sided barrier is not less than the distance between the outer side of the glass ribbon and the side wall of the tin bath.

[0010] Preferably, the installation height of the single-sided barrier is 10-60 mm below the surface of the tin liquid in the tin bath.

[0011] Preferably, linear motors and tin liquid coolers are installed in the small ear pools on both sides of the tin bath.

[0012] Preferably, the barrier material is graphite, or metal tungsten, or a composite of the two.

[0013] A tin bath comprises the above-mentioned retaining device for removing tin slag.

[0014] Preferably, the small ear pool outlet is a submerged outlet located below the liquid surface of the tin liquid, and the submerged outlet is close to the bottom of the tin liquid pool.

[0015] The utility model has the beneficial effects: the baffle device proposed by the utility model is installed between the inlet and outlet of the small ear pool on both sides of the outlet end of the tin bath, and an opening is set in the middle of the baffle to weaken the shortest path principle followed by the traditional circulating tin flow. With the help of the baffle's obstruction effect on the bottom flow discharged from the small ear pool, the circulating tin flow is forced to flow toward the opening in the middle of the baffle to form a wide path circulation, that is, the bottom flow bypasses the center line area of ​​the tin bath, thereby enhancing the tin ash cleaning effect near the center position of the wide tin bath. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a tin bath equipped with a retaining device for removing tin slag, shown in the utility model;

[0017] Figure 2 This is a schematic diagram of another type of slag-removing retaining device provided in the utility model.

[0018] In the figure: 1-tin bath, 2-small ear pool, 3-end wall, 4-side wall, 5-linear motor, 6-single-side barrier, 7-glass belt. DETAILED DESCRIPTION

[0019] 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.

[0020] The utility model provides a sill device for removing tin slag, which is applied to the outlet of the float glass tin bath. Figure 1 As shown, a schematic diagram of a tin bath 1 equipped with a barrier device for removing tin slag is disclosed, the barrier device is a barrier structure installed between the inlet and outlet of the small ear pool 2 on both sides of the tin bath outlet end, and includes two single-sided barriers 6 in the figure, the single-sided barrier 6 is fixed on the bottom of the tin bath, one end is connected to the tin bath side wall between the small ear pool inlet and the small ear pool outlet, and the other end is open toward the moving direction of the glass ribbon 7, each pair of barrier structures is symmetrical about the central axis of the tin bath along the length direction, and an opening is left in the central axis area of ​​the tin bath, and the whole is in an eight-shaped shape, and there is an acute angle between the single-sided barrier 6 and the downstream tin bath side wall 4. The barrier device weakens the short-circuit circulating tin flow near the small ear pool 2, and forces the circulating tin flow to flow toward the opening in the middle of the barrier to form a wide-circuit circulation.

[0021] like Figure 2 As shown, the above-mentioned retaining wall structure can also adopt an overall linear structure, and the single-sided retaining wall 6 and the downstream tin bath side wall 4 form a right angle.

[0022] When installing the single-sided retaining wall 6, it can be fixed to the bottom of the tin bath with a lighter material, or a material with a greater specific gravity than tin can be selected and sunk into the molten tin. The most commonly used materials are graphite, metal tungsten, or a composite of the two. The height of the retaining wall can be in the range of 10-60mm below the surface of the molten tin, preferably 20-40mm. The length of the single-sided retaining wall 6 is not limited and can be designed according to the needs of technical personnel in this field. It can extend from the tin bath side wall 4 to an opening close to the central axis of the tin bath with only a remaining width of not less than 100mm, or it can be located only below the free tin liquid level on the outside of the glass strip 7. When it is only used for the free tin liquid level on the outside of the glass strip 7, the height of the retaining wall can be higher than the tin liquid level.

[0023] In this embodiment, the outlet of the small ear pool 2 adopts a submerged outlet located below the liquid tin surface, and the submerged outlet is close to the bottom of the liquid tin pool. In order to increase the tin liquid flow of the wide-path circulation, a linear motor 5 and a tin liquid cooler can be installed in the small ear pools 2 on both sides of the tin tank to Figure 1 or Figure 2 The middle direction is used as a schematic diagram. The thrust direction of the linear motor 5 in a pair of small ear pools 2 is from downstream to upstream. Here, upstream and downstream refer to the direction of glass movement from upstream to downstream. After the tin liquid containing tin ash touches the end wall 3 on the outlet side, it flows into the small ear pool 2 driven by the wide-path circulating liquid and the action of the linear motor 5. When the tin liquid flows through the small ear pool 2, the temperature decreases and the density is relatively large. At the outlet of the small ear pool 2, due to the use of a submerged outlet, the tin ash floating above the tin liquid is intercepted at the submerged outlet. It can be manually removed regularly or a channel for automatically flowing into the tin ash collection pool can be set. The clean tin liquid near the bottom of the tin tank flows back to the tin tank. Due to the setting of the barrier device, the channel for the tin liquid to reflux in the shortest path is blocked, that is, the short-circuit circulation generated by only setting the small ear pools 2 on both sides of the tin tank is weakened, forcing most of the circulating tin liquid to flow through the middle, thereby enhancing the wide-path circulation. Since the barrier device is located below the surface of the tin liquid, it does not affect the natural flow of the tin liquid caused by the movement of the glass ribbon 7. The short-circuit circulation mentioned here means that the tin liquid only generates a circulation loop in the area near the small ear pool 2, and cannot act on the tin ash near the center of the wide tin tank; the wide-circuit circulation means that the circulating tin flow covers the tin ash near the center of the wide tin tank. Since the small ear pool 2 is located outside the tin tank, the temperature is lower than that inside the tin liquid tank. The linear motor 5 itself has a water cooling pipeline, which has a certain cooling effect on the tin liquid. The tin liquid temperature in the small ear pool 2 can be further reduced in combination with the tin liquid cooler. The density of the tin liquid increases after cooling, and the tin liquid that flows back to the tin tank forms a bottom flow, which can form a wide-circuit circulation along the barrier, thereby enhancing the tin ash cleaning effect near the center of the wide tin tank.

[0024] Those skilled in the art may also, based on the above design, change a pair of retaining ridge structures into multiple pairs of retaining ridge structures, while the principle remains unchanged.

[0025] 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 slag removal device, applied to the outlet of float glass tin bath, characterized in that: The invention comprises a retaining wall structure installed between the entrance of the small ear pool (2) and the outlet of the small ear pool (2) on both sides of the tin bath outlet, the retaining wall structure comprises two single-sided retaining walls (6), the single-sided retaining walls are fixed on the bottom of the tin bath, one end of the single-sided retaining walls is connected to the side wall of the tin bath between the entrance of the small ear pool and the outlet of the small ear pool, and the other end is open toward the central axis of the tin bath, each pair of retaining wall structures are symmetrical about the central axis of the tin bath along the length direction, and an opening is left in the central axis area of ​​the tin bath.

2. The ridge device for removing tin slag according to claim 1 is characterized in that: The length of the single-sided barrier is not less than the distance between the outer side of the glass strip and the side wall of the tin bath.

3. The ridge device for removing tin slag according to claim 1, characterized in that: The installation height of the single-sided barrier is 10-60 mm below the surface of the tin liquid in the tin bath.

4. The ridge device for removing tin slag according to claim 1, characterized in that: A linear motor (5) and a tin liquid cooler are installed in the small ear pools on both sides of the tin bath.

5. A tin bath, characterized in that: The invention comprises a ridge device for removing tin slag as described in any one of claims 1 to 4.

6. The tin bath according to claim 5, characterized in that: The outlet of the small ear pool is a submerged outlet located below the liquid surface of the tin liquid.

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