Sand sealing system in walking direction of shuttle kiln
By setting elastic sealing shrapnel between the sand sealing plate and the sand sealing groove of the shuttle kiln, the problem of sealing sand spillage is solved, and the sealing performance and production consistency is improved.
Patent Information
- Application Number
- CN202421210356.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In shuttle kilns, as the production pace accelerates, the relative activity between the sand sealing plate and the sand sealing trough leads to overflow of sealing sand, reducing sealing performance, and increasing the risk of energy loss and uncontrollable temperature curves.
A closed shrapnel is arranged between the sand sealing plate and the sand sealing trough, and the elasticity of the sealing sand is kept in the groove, reducing the overflow of the sealing sand caused by relative movement.
It effectively reduces the spillover of sealing sand, improves sealing performance, reduces energy loss and instability of temperature curves, and ensures production consistency.
Smart Images
Figure CN222460248U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the sealing technology of shuttle kilns, in particular to a sand sealing system for the traveling direction of a shuttle kiln. Background Art
[0002] Shuttle kiln: It is an intermittent firing kiln, similar to the structure of a matchbox. The kiln cart is pushed into the kiln for firing and then pulled out in the opposite direction after firing to unload the fired ceramics. The kiln cart is like a shuttle, so it is called a shuttle kiln.
[0003] In the production of ductile iron pipes, it is generally used in the annealing process of large-diameter (DN1100 and above) cast pipes. It is occasionally called a drawer-type annealing furnace. Whether in a shuttle kiln or a tunnel kiln, sand seals are used between the kiln car (also called a trolley) and the kiln wall (also called the furnace wall). The air pressure seal between the bottom and top of the kiln car is achieved by the sand seal plate on the kiln car and the sand in the sand seal groove.
[0004] The inventors found that when using the shuttle kiln / drawer annealing furnace, as the production rhythm accelerates, the relative movement between the sand sealing plate and the sand sealing groove will cause the sealing sand to overflow. Figure 7 As shown, with the overflow of sealing sand, the sealing performance will gradually decrease, resulting in energy loss or the temperature curve during annealing cannot be controlled. In order to ensure the sealing effect, sealing sand must be regularly added to the sand sealing groove to ensure the sealing effect. In addition, there are major safety hazards around the annealing furnace, which is not conducive to production continuity. Summary of the invention
[0005] In order to overcome the situation that the relative movement between the sand sealing plate and the sand sealing groove will cause the sealing sand to overflow, the inventor adopts a technical solution of setting a sealing spring between the sand sealing plate (also called sand sealing knife) and the sand sealing groove, and using the elasticity of the sealing spring to maintain the relative movement between the sand sealing knife and the sand sealing groove, and reducing the overflow of the sealing sand. The technical solution adopted by the utility model is: a shuttle kiln walking direction sand sealing system, including:
[0006] Trolley;
[0007] Furnace wall, the kiln wall on both sides of the trolley's travel direction;
[0008] Sand sealing grooves, fixed to the groove bodies on both sides of the trolley in the traveling direction, the sand sealing grooves are filled with sealing sand;
[0009] A sand sealing knife is fixed to a long strip-shaped plate-like body on one side of the furnace wall facing the trolley. When the trolley moves, the sand sealing knife extends into the sand sealing groove to achieve sealing on both sides of the trolley's moving direction with the help of the sealing sand; and further includes:
[0010] The closing spring is a refractory elastic metal sheet fixed to the end of the sand sealing groove on the inner side of the shuttle kiln. One end of the closing spring is fixed to the sand sealing groove, and the other end abuts against the sand sealing knife with the help of elastic force. Two groups of closing springs are symmetrically arranged with the sand sealing knife. The two groups of closing springs cooperate with the sand sealing knife to seal the sealing sand in the sand sealing groove.
[0011] Furthermore, the angle between the closing spring piece and the sand sealing knife is an acute angle, and the closing spring piece faces the side of the sand sealing groove where the sealing sand is provided.
[0012] Furthermore, the closing spring piece is provided with a knife guiding sand blocking portion at the contact end with the sand sealing knife, away from the sand sealing knife. The knife guiding sand blocking portion is fixedly connected to the closing spring piece and is V-shaped when viewed from the upper side of the sand sealing groove.
[0013] Furthermore, a sand scraping part is provided at the angle gap between the guide knife sand blocking part and the sand sealing knife, with one end fixed on the guide knife sand blocking part and the other end facing the sand sealing knife. The sand scraping part is a refractory elastic metal sheet, and the sand scraping part abuts against the sand sealing knife by means of elastic force.
[0014] Furthermore, a sealing portion is provided at the gap between the closing spring piece and the sand sealing knife.
[0015] Furthermore, the sealing part is ceramic fiber cotton.
[0016] Furthermore, one end of the sealing part is fixed to the closing spring sheet, and the other end is gap-matched with the sand sealing knife; or
[0017] The resealing part is fixed to the bottom of the sand sealing groove, and two sides thereof are respectively matched with the closing spring piece and the sand sealing knife in a clearance.
[0018] Compared with the prior art, the utility model has the following beneficial effects: the sand sealing groove is used to reduce the overflow of sealing sand caused by the relative movement between the sand sealing knife and the sand sealing groove; the sealing sand adhering to the sand sealing knife is removed by means of the technical feature that the angle between the sealing spring piece and the sand sealing knife is an acute angle, thereby further preventing the overflow of sealing sand; the knife-guiding sand-blocking part can prevent the sealing sand driven by inertia when the sand sealing knife moves, and at the same time, the two groups of knife-guiding sand-blocking parts are symmetrically arranged in a V shape to provide a guide surface for the sand sealing knife; the supplementary sealing part makes up for the overflow gap when the angle between the sealing spring piece and the sand sealing knife is an acute angle. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Schematic diagram of the sand sealing system of the specific implementation method of the utility model
[0020] Figure 2 This is a side view of the sand sealing system of the specific embodiment of the utility model
[0021] Figure 3 A top view of the sand sealing system of the present utility model
[0022] Figure 4 This is a partial enlarged view of the end of the sand sealing groove in the specific implementation method of the utility model
[0023] Figure 5 This is a partial enlarged view of the sand sealing groove end including the sand blocking part and the sand scraping part of the specific implementation method of the utility model
[0024] Figure 6 This is a partial enlarged view of the end of the sand sealing groove including the sealing part in the specific implementation method of the utility model
[0025] Figure 7 Schematic diagram of the prior art
[0026] The annotations are:
[0027] 1-trolley; 2-sand sealing groove; 3-sealing sand; 4-furnace wall; 5-sand sealing knife;
[0028] 6-closing spring; 61-knife guiding sand blocking part; 62-sand scraping part; 63-sealing part; DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.
[0030] In order to overcome the situation that the relative movement between the sand sealing plate and the sand sealing groove will cause the sealing sand to overflow, the inventors have adopted a technical solution of setting a sealing spring between the sand sealing knife and the sand sealing groove, and using the elasticity of the sealing spring to keep the sealing sand from overflowing even if there is relative movement between the sand sealing knife and the sand sealing groove. Figures 1 to 6 The technical solution adopted by the utility model is: a shuttle kiln walking direction sand sealing system, including:
[0031] Trolley 1; in this specific embodiment, the trolley 1 can also be understood as a kiln car in a shuttle kiln. The kiln car is closed in the circumference, and only the furnace body with an opening on one side is retained to form the basic structure of a shuttle kiln / drawer annealing furnace. In application, the trolley 1 usually needs to be frequently pulled out, opened and closed according to production requirements.
[0032] Furnace wall 4, the kiln wall on both sides of the travel direction of the trolley 1; see Figure 1 In this specific implementation, in order to illustrate the specific structure of the sand sealing system, only a portion is captured for display.
[0033] The sand sealing groove 2 is fixed to the groove body on both sides of the traveling direction of the trolley 1, and the sand sealing groove 2 is filled with sealing sand 3; the length of the sand sealing groove 2 is usually equal to or slightly longer than the length of the trolley to facilitate overall sealing.
[0034] The sand sealing knife 5 is fixed to the long plate-shaped body on the furnace wall 4 facing the side of the trolley 1. When the trolley 1 moves, the sand sealing knife 5 extends into the sand sealing groove 2, and the sealing sand 3 is used to achieve sealing on both sides of the trolley 1 in the moving direction. Based on the existing technology, the inventors have studied the problems of the existing technology and proposed that:
[0035] The closing spring piece 6 is a refractory elastic metal piece fixed to the end of the sand sealing groove 2 in the inner direction of the shuttle kiln. One end of the closing spring piece 6 is fixed to the sand sealing groove 2, and the other end is abutted against the sand sealing knife 5 by elastic force. The closing spring piece 6 is symmetrically arranged with the sand sealing knife 5 in two groups. The two groups of closing spring pieces 6 cooperate with the sand sealing knife 5 to seal the sealing sand 3 in the sand sealing groove 2. Please refer to Figure 3 and Figure 4 The inventor found that in the prior art, the sealing sand 3 may overflow due to the reciprocating motion of the sand sealing knife 5. In order to overcome the above situation, the inventor creatively arranged a sealing spring piece 6 at the end of the sand sealing groove 2, where the trolley 1 enters the innermost side of the kiln, so that the sealing sand 3 is sealed in the sand sealing groove 2 under the action of the sealing spring piece 6. Through experiments, it is found that the above technical solution can effectively reduce the overflow of the sealing sand 3.
[0036] In some technical solutions, the angle between the closing spring piece 6 and the sand sealing knife 5 is an acute angle, and the closing spring piece 6 faces the side of the sand sealing groove 2 where the sealing sand 3 is arranged. The setting of the acute angle between the closing spring piece 6 and the sand sealing knife 5 is to make the two groups of closing spring pieces 6 form a structure with a sharp angle, which has a certain guiding effect when the sand sealing groove 2 contacts the sand sealing knife 5, and the point contact will produce a small amount of sealing sand 3 mixed in the middle, and will not produce a large gap when it is a surface foundation, causing the sand sealing groove 2 to overflow.
[0037] Preferably, the closing spring piece 6 is provided with a knife-leading sand-blocking portion 61 at the end in contact with the sand-sealing knife 5 and away from the sand-sealing knife 5. The knife-leading sand-blocking portion 61 is fixedly connected to the closing spring piece 6 and is V-shaped when viewed from the upper side of the sand-sealing groove 2. Figure 5When the sand sealing groove 2 withdraws with the trolley 1, the inventor finds that due to the relative movement between the closing spring piece 6 and the sand sealing knife 5, or the gap generated, the sealing sand 3 will flow out with the sand sealing knife 5. The inventor uses the structure of the sand-blocking portion 61 of the guiding knife to increase the circumferential pressure of the sealing sand 3 at the contact point, and cooperates with the pressure generated by the closing spring piece 6 to prevent the sealing sand 3 from overflowing.
[0038] Preferably, a sand scraping portion 62 is provided at the angle gap between the knife-leading sand blocking portion 61 and the sand sealing knife 5, one end of which is fixed to the knife-leading sand blocking portion 61 and the other end of which faces the sand sealing knife 5. The sand scraping portion 62 is a fire-resistant elastic metal sheet, and the sand scraping portion 62 abuts against the sand sealing knife 5 by elastic force. In this specific embodiment, the sealing sand 3 adhering to the surface of the sand sealing knife 5 is removed by means of the structure of the sand scraping portion 62.
[0039] In other technical solutions, a sealing part 63 is provided at the angle gap between the closing spring piece 6 and the sand sealing knife 5. The sealing part 63 is ceramic fiber cotton. One side of the sealing part 63 is fixed to the closing spring piece 6, and the other end is in gap fit with the sand sealing knife 5; or
[0040] The said sealing part 63 is fixed to the bottom of the said sand sealing groove 2, and the two sides thereof are respectively matched with the said closing spring piece 6 and the sand sealing knife 5 in a clearance. Figure 6 At the position of the resealing part 63, due to the lack of cooperation between the sealing sand and the sand sealing knife 5, a certain amount of heat will overflow. In order to avoid this situation, the resealing part 63 can be set on the inner side of the closing spring piece 6 close to the sand sealing knife 5. The resealing part 63 and the sand sealing knife 5 can be an interference fit or a clearance fit. When it is an interference fit, the material needs to be replaced frequently. When it is a clearance fit, the heat overflow can be effectively reduced. Or at the bottom of the sand sealing groove 2, at the end of the final position where the trolley 1 enters, the resealing part 63 is fixedly set, which can also reduce the overflow.
[0041] In specific operation, the sand sealing groove 2 and two sets of sealing springs 6 form a groove body in which the sealing sand 3 is loaded. Figure 3 When the trolley 1 enters, the two sets of sealing springs 6 separate and fit with the sand sealing knife 5 by elastic force to reduce the overflow of the sealing sand 3. When the trolley 1 leaves the kiln, the sand blocking portion 61 of the knife will prevent the sealing sand 3 from flowing outward. The workpiece on the trolley 1 is transported away or loaded in, and the trolley 1 enters again.
[0042] Compared with the prior art, the utility model has the following beneficial effects: the sand sealing groove is used to reduce the overflow of sealing sand caused by the relative movement between the sand sealing knife and the sand sealing groove; the sealing sand adhering to the sand sealing knife is removed by means of the technical feature that the angle between the sealing spring piece and the sand sealing knife is an acute angle, thereby further preventing the overflow of sealing sand; the knife-guiding sand-blocking part can prevent the sealing sand driven by inertia when the sand sealing knife moves, and at the same time, the two groups of knife-guiding sand-blocking parts are symmetrically arranged in a V shape to provide a guide surface for the sand sealing knife; the supplementary sealing part makes up for the overflow gap when the angle between the sealing spring piece and the sand sealing knife is an acute angle.
[0043] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A shuttle kiln travel direction sand sealing system, comprising: Trolley (1); Furnace walls (4), which are kiln walls on both sides of the traveling direction of the trolley (1); Sand sealing grooves (2) are fixed to the groove bodies on both sides of the traveling direction of the trolley (1), and the interior of the sand sealing grooves (2) is filled with sealing sand (3); The sand sealing knife (5) is a long plate-like body fixed to the furnace wall (4) on one side facing the trolley (1); when the trolley (1) moves, the sand sealing knife (5) extends into the sand sealing groove (2) to achieve sealing on both sides of the trolley (1) in the moving direction with the help of the sealing sand (3); it is characterized by further comprising: The closing spring piece (6) is a refractory elastic metal piece fixed to the end of the sand sealing groove (2) on the inner side of the shuttle kiln. One end of the closing spring piece (6) is fixed to the sand sealing groove (2), and the other end is abutted against the sand sealing knife (5) by means of elastic force. The closing spring piece (6) is symmetrically arranged in two groups with the sand sealing knife (5). The two groups of closing spring pieces (6) cooperate with the sand sealing knife (5) to seal the sealing sand (3) in the sand sealing groove (2).
2. According to claim 1, the shuttle kiln travel direction sand sealing system is characterized in that: The angle between the closing spring piece (6) and the sand sealing knife (5) is an acute angle, and the closing spring piece (6) faces the side of the sand sealing groove (2) where the sealing sand (3) is provided.
3. According to claim 2, the shuttle kiln travel direction sand sealing system is characterized in that: The closing spring piece (6) is provided with a knife-guiding sand-blocking portion (61) at the end in contact with the sand-sealing knife (5) in a direction away from the sand-sealing knife (5); the knife-guiding sand-blocking portion (61) is fixedly connected to the closing spring piece (6) and is V-shaped when viewed from above the sand-sealing groove (2).
4. According to claim 3, the shuttle kiln travel direction sand sealing system is characterized in that: A sand scraping portion (62) is provided at the angle gap between the guide knife sand blocking portion (61) and the sand sealing knife (5), one end of which is fixed to the guide knife sand blocking portion (61) and the other end of which is directed toward the sand sealing knife (5). The sand scraping portion (62) is a fire-resistant elastic metal sheet, and the sand scraping portion (62) abuts against the sand sealing knife (5) by means of elastic force.
5. The shuttle kiln travel direction sand sealing system according to any one of claims 2-4, characterized in that: A sealing portion (63) is provided at the gap between the sealing spring piece (6) and the sand sealing knife (5).
6. The shuttle kiln travel direction sand sealing system according to claim 5, characterized in that: The sealing portion (63) is ceramic fiber cotton.
7. The shuttle kiln travel direction sand sealing system according to claim 5, characterized in that: One side of the sealing portion (63) is fixed to the sealing spring (6), and the other end is loosely fitted with the sand sealing knife (5); or The resealing portion (63) is fixed to the bottom of the sand sealing groove (2), and two sides thereof are respectively clearance-matched with the closing spring sheet (6) and the sand sealing knife (5).