Upper sealing valve of blast furnace

Abstract

According to the upper sealing valve of the blast furnace, a crank arm extends into a box chamber of a valve box, the crank arm is fixedly connected with a valve plate, and the plate face of the valve plate is larger than the opening area of a feeding opening; the bearing seat and the box body are integrally connected, the first telescopic air cylinder is hinged to the outer side of the valve box, the output end of the first telescopic air cylinder is fixedly connected to the crank arm, and a wedge-caulking piece of the wedge-caulking assembly is slidably connected to the box body of the valve box. The bearing seats are integrally connected with the top of the outer side of the valve box, it is guaranteed that the axes of the bearing seats are located at the same coaxiality, adjustment is not needed when the rotating shaft is installed, and the labor intensity of workers is relieved. A wedge-caulking piece of the wedge-caulking assembly is in sliding connection with a box body of the valve box, stretches into the valve box and abuts against the two ends, in the plate length direction, of the valve plate, and when the valve plate is buckled to a discharging port of the valve box, the wedge-caulking piece stretches into the valve box to support the bottom end face of the valve plate in the Y direction and extrude the end faces of the two ends, in the plate length direction, of the valve plate in the X direction; and the leakage risk of the sealing valve is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace sealing, and in particular to a sealing valve on a blast furnace. Background Art

[0002] The upper and lower sealing valves of blast furnaces are used to ensure that the gas does not leak out when the blast furnace is operating normally, and to maintain pressure, thereby improving the smelting efficiency of the blast furnace. The existing upper and lower sealing valves of blast furnaces generally adopt a crank arm structure, where the oil cylinder is directly connected to the crank arm, the main shaft is connected to the crank arm on the valve plate, and the valve plate is connected to the crank arm pin shaft. The valve plate is in contact with the valve seat through back pressure to achieve a sealing effect.

[0003] However, in actual operation, since the oil cylinder is directly connected to the crank arm and has no self-locking function, under working conditions without oil pressure, the upper and lower ends of the valve plate usually cannot reach the rated pressure difference due to the equalization pressure, and the valve plate opens automatically due to gravity, thus failing to achieve the pressure-maintaining function. Since the valve plate and the crank arm are connected by a pin shaft, the internal and external freedom of the valve plate is limited, making it difficult to achieve sealing. Utility Model Content

[0004] The embodiment of the present application provides a sealing valve for a blast furnace, aiming to ensure good sealing between the sealing valve and the blast furnace and reduce the labor intensity of the staff.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: A sealing valve for a blast furnace, characterized in that it comprises: a valve box, a valve seat, a valve plate, a crank arm, a rotating shaft, a first telescopic cylinder, a bearing seat, and a wedging assembly;

[0006] The valve box is placed vertically, and a feed port is provided on the top of the valve box; the curved arm is arranged on the upper outer part of the valve box and is rotatably connected to the valve box, and the inner side of the curved arm extends into the box chamber of the valve box;

[0007] The inner side of the crank arm is fixedly connected with a valve plate, which can drive the valve plate to rotate in the valve box, and the plate area of ​​the valve plate is larger than the port area of ​​the feed port;

[0008] The rotating shaft is horizontally arranged beside the crank arm, and one end of the rotating shaft extends to the bottom of the crank arm and is fixedly connected to the crank arm;

[0009] The bearing seats are respectively arranged on both sides of the shaft in the axial length direction and are rotatably connected with the shaft; the bearing seat located on the side close to the crank arm is arranged at a distance from the crank arm, and the two bearing seats are integrally connected to the outer top of the valve box body and are at the same horizontal height;

[0010] The first telescopic cylinder is arranged on one side of the crank arm, the input end of the first telescopic cylinder is hinged to the outside of the valve box, and the output end of the first telescopic cylinder is fixedly connected to the crank arm, and can drive the crank arm to rotate around one side of the box body;

[0011] The wedging member of the wedging assembly is arranged on the box body of the valve box and is slidably connected with the valve box, and can extend into the interior of the valve box and abut against a part of the side surface of the valve plate.

[0012] Furthermore, the two bearing seats are vertically arranged, and the two bearing seats are integrally connected to the outer top of the box body and are at the same horizontal height.

[0013] Furthermore, it also includes a cover plate, which is fixedly arranged on a side of the bearing seat away from the crank arm and is fixedly connected to the box body of the valve box, so that the bearing seat can be fixed inside the cover plate in a semi-enclosed manner.

[0014] Furthermore, the cover plate is an overall U-shaped groove plate, the groove opening of the cover plate faces one side of the curved arm, and the bottom surface of the groove of the cover plate is a smooth surface.

[0015] Further, the wedging assembly includes a wedging block, a mounting seat, and a second telescopic cylinder;

[0016] The wedge block is arranged in the box body of the valve box and is slidably connected with the valve box and can extend into the interior of the valve box; the inner end of the wedge block contacts the two ends of the valve plate in the plate length direction;

[0017] The mounting seat is fixedly arranged on the outside of the valve box and is located below the wedge block;

[0018] The input end of the second telescopic cylinder is hinged to the upper end surface of the mounting seat, and the output end of the second telescopic cylinder is fixedly connected to the outer end surface of the wedge block, which can drive the wedge block to perform reciprocating linear motion on the box body of the valve box.

[0019] Furthermore, the inner wall of the sealing ring is slidably connected to the outer wall of the wedge block, and the inner wall of the sealing ring is fixedly connected to the inner wall of the valve box.

[0020] Furthermore, the cross-sectional profile of the crank arm is in the shape of a figure 6 as a whole, and the top of the crank arm is in a hook-shaped structure, which is fixedly connected to one end of the first telescopic cylinder and can drive the crank arm to rotate.

[0021] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0022] In the present application, the bearing seat and the outer top of the valve box are integrally connected to ensure that the axis of the bearing seat is at the same axiality, and no adjustment is required when installing the rotating shaft, which reduces the labor intensity of the staff. When the rotating shaft drives the valve plate to rotate, the two ends of the rotating shaft are also at the same axiality, avoiding the seal wear between the rotating shaft and the bearing caused by different axialities. The wedge clamp of the wedge clamping assembly is slidably connected to the box body of the valve box, extending into the interior of the valve box and contacting with the two ends of the valve plate along the length of the plate. When the valve plate is buckled into the outlet of the valve box, the wedge clamp extends into the interior of the valve box to form a Y-direction support for the bottom end face of the valve plate, and forms an X-direction extrusion on the two end faces of the valve plate in the plate length direction, locking the valve plate, thereby avoiding the risk of leakage of the sealing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a partial cross-section of a sealing valve on a blast furnace provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure in a side view state provided by an embodiment of the present application;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of area A in the middle.

[0027] Icons: 1-valve box; 2-valve plate; 3-crank arm; 4-rotating shaft; 5-first telescopic cylinder; 6-bearing seat; 7-cover plate; 8-wedge block; 9-mounting seat; 10-second telescopic cylinder; 11-sealing ring. 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 in 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] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present 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 on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0030] Combination Figure 1-Figure 3 As shown, a sealing valve on a blast furnace comprises: a valve box 1, a valve plate 2, a crank arm 3, a rotating shaft 4, a first telescopic cylinder 5, a bearing seat 6, and a wedging assembly; the valve box 1 is placed vertically, and a feed port is provided on the top of the valve box 1; the crank arm 3 is arranged at the upper outer part of the valve box 1 and is rotatably connected to the valve box 1, and the inner side of the crank arm 3 extends to the box chamber of the valve box 1; the inner side of the crank arm 3 is fixedly connected with the valve plate 2, which can drive the valve plate 2 to rotate in the valve box 1, and the plate area of ​​the valve plate 2 is larger than the mouth area of ​​the feed port; the rotating shaft 4 is horizontally arranged beside the crank arm 3, and one end of the rotating shaft 4 extends to the bottom of the crank arm 3 and is fixedly connected to the crank arm 3; the bearing seats 6 are respectively It is arranged on both sides of the axial length direction of the rotating shaft 4 and is rotatably connected to the rotating shaft 4. The two bearing seats 6 are integrally connected to the outer top of the valve box 1 and are at the same horizontal height; the bearing seat 6 located on the side close to the crank arm 3 is spaced apart from the crank arm 3; the first telescopic cylinder 5 is arranged on one side of the crank arm 3, and the input end of the first telescopic cylinder 5 is hinged to the outside of the valve box 1, and the output end of the first telescopic cylinder 5 is fixedly connected to the crank arm 3, which can drive the crank arm 3 to rotate around one side of the box body; the wedging member of the wedging assembly is arranged on the box body of the valve box 1, and is slidably connected to the valve box 1, can extend into the interior of the valve box 1, and abut against part of the side of the valve plate 2.

[0031] In the above scheme, the first telescopic cylinder 5, the crank arm 3, the bearing seat 6, and the telescopic assembly are respectively arranged on the adjacent box body of the valve box 1, the valve plate 2 and the rotating shaft 4 are arranged inside the valve box 1, the two ends of the rotating shaft 4 extend horizontally out of the box body of the valve box 1 and are rotatably connected with the bearing seat 6, one end of the rotating shaft 4 is fixedly connected with the crank arm 3, the axial surface of the rotating shaft 4 is fixedly connected with one end of the valve plate 2, the top of the crank arm 3 is fixedly connected with the output end of the first telescopic cylinder 5, and the input end of the first telescopic cylinder 5 is hinged with the box body of the valve box 1. When the output end of the first telescopic cylinder 5 drives the crank arm 3 to rotate, the crank arm 3 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the valve plate 2 to rotate around the axis of the rotating shaft 4, so as to open or close the valve plate 2 and the discharge port of the valve box 1. The bearing seat 6 is integrally connected with the outer top of the valve box 1 to ensure that the axis of the bearing seat 6 is at the same axiality, and no adjustment is required when installing the rotating shaft 4, which reduces the labor intensity of the staff. When the shaft 4 drives the valve plate 2 to rotate, the two ends of the shaft 4 are also at the same axiality, avoiding the wear of the seal between the shaft 4 and the bearing caused by different axialities. The wedge-locking member of the wedge-locking assembly is slidably connected to the box body of the valve box 1, extending into the interior of the valve box 1 and contacting the two ends of the valve plate 2 along the length of the plate. When the valve plate 2 is buckled into the outlet of the valve box 1, the wedge-locking member extends into the interior of the valve box 1 to form a Y-direction support for the bottom end face of the valve plate 2, and forms an X-direction extrusion on the two end faces of the valve plate 2 in the plate length direction, locking the valve plate 2, thereby avoiding the risk of leakage of the sealing valve.

[0032] It also includes a cover plate 7, which is fixedly arranged on the outer side of the bearing seat 6 away from the crank arm 3 and fixedly connected to the box body of the valve box 1, so that the bearing seat 6 can be fixed inside the cover plate 7 in a semi-enclosed manner.

[0033] The sealing valve on the blast furnace in the present application also includes a cover plate 7, which is fixedly connected to the box body of the valve box 1, surrounding the bearing seat 6 and the valve body to prevent flying dust and ash from contaminating the bearing seat 6 and causing wear between the rotating shaft 4 and the bearing seat 6, while further supporting the bearing seat 6 to ensure that the bearing seats 6 arranged on both sides of the box body are at the same axiality.

[0034] The cover plate 7 is a U-shaped groove plate as a whole, the groove of the cover plate 7 faces the side of the crank arm 3, and the bottom surface of the groove of the cover plate 7 is smooth. The smooth surface of the groove bottom of the cover plate 7 is set to prevent the end surface of the rotating shaft 4 from wearing the bottom surface of the groove of the cover plate 7 when the rotating shaft 4 rotates, and also constrain one end of the rotating shaft 4 in the X direction.

[0035] The wedging assembly includes a wedging block 8, a mounting seat 9, and a second telescopic cylinder 10; the wedging block 8 is arranged in the box body of the valve box 1, and is slidably connected to the valve box 1, and can extend into the interior of the valve box 1; the inner end of the wedging block 8 is in contact with the two ends of the valve plate 2 in the plate length direction; the mounting seat 9 is fixedly arranged on the outer side of the valve box 1 and is located below the wedging block 8; the input end of the second telescopic cylinder 10 is hinged to the upper end surface of the mounting seat 9, and the output end of the second telescopic cylinder 10 is fixedly connected to the outer end surface of the wedging block 8, which can drive the wedging block 8 to make reciprocating linear motion on the box body of the valve box 1.

[0036] The wedging assembly in the present application is composed of a wedging block 8, a mounting seat 9, and a second telescopic cylinder 10. The wedging blocks 8 are arranged on both sides of the length direction of the valve plate 2. The wedging blocks 8 horizontally pass through the valve box 1 and are slidably connected to the box body of the valve box 1. One end of the wedging block 8 contacts the two ends of the length of the valve plate 2. The bottom of the wedging block 8 is fixedly connected to the output end of the second telescopic cylinder 10. The input end of the second telescopic cylinder 10 is fixedly connected to the mounting seat 9. When the second telescopic cylinder 10 is extended, it drives the wedging block 8 to move into the valve box 1 and contacts the end faces of the two ends of the length of the valve plate 2, thereby further supporting the valve plate 2 and strengthening the box seal around the valve plate 2 and the discharge port of the valve box 1.

[0037] The inner end of the wedge block 8 is inclined, and both ends of the valve plate 2 along the length direction of the plate are inclined. The inner end of the wedge block 8 fits with the end faces of the valve plate 2 along the length direction of the plate.

[0038] In the above scheme, the end of the wedge block 8 extending into the valve box 1 is the inner end, and the inner end of the wedge block 8 is arranged in an inclined surface. When the wedge block 8 extends into the valve box 1, the inner end of the wedge block 8 continuously abuts against the end of the valve plate 2 close to the wedge block 8, and the inner end of the wedge block 8 supports the valve plate 2 in the Y-axis direction and clamps the valve plate 2 in the X-axis direction. This arrangement not only ensures the stable sealing of the valve plate 2 and the surrounding box body of the discharge port of the valve box 1, but also ensures the further sealing of the valve plate 2 and the inside of the valve box 1, avoiding the risk of gas leakage in the blast furnace chamber.

[0039] A sealing ring 11 is provided at the connection between the outer end of the wedge block 8 and the valve box 1 , the inner wall of the sealing ring 11 is slidably connected to the outer wall of the wedge block 8 , and the inner wall of the sealing ring 11 is fixedly connected to the inner wall of the valve box 1 .

[0040] In the above scheme, the sealing ring 11 is provided to prevent the gas in the blast furnace chamber from leaking from the connection between the wedge block 8 and the valve box 1 when the wedge block 8 slides on the valve box 1, and to prevent the wedge block 8 from scratching the valve box 1 when it extends into or retracts on the valve box 1.

[0041] The cross-sectional profile of the crank arm 3 is in the shape of a figure 6, and the top of the crank arm 3 is in a hook-shaped structure, which is fixedly connected to one end of the first telescopic cylinder 5 and can drive the crank arm 3 to rotate. The purpose of this arrangement is to prevent the structure of the crank arm 3 from interfering with the rotation of the first telescopic cylinder 5 and the crank arm 3 when the first telescopic cylinder 5 drives the crank arm 3 to rotate, so as to ensure the stable rotation of the crank arm 3.

[0042] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A sealing valve for a blast furnace, characterized in that: include: A valve box (1), a valve plate (2), a crank arm (3), a rotating shaft (4), a first telescopic cylinder (5), a bearing seat (6), and a wedging assembly; The valve box (1) is placed vertically, and a feed port is provided on the top of the valve box (1); the curved arm (3) is arranged on the upper outer portion of the valve box (1) and is rotatably connected to the valve box (1), and the inner side of the curved arm (3) extends into the box chamber of the valve box (1); The valve plate (2) is fixedly connected to the inner side of the crank arm (3), and can drive the valve plate (2) to rotate in the valve box (1); the plate surface area of ​​the valve plate (2) is larger than the opening area of ​​the feed port; The rotating shaft (4) is horizontally arranged beside the crank arm (3), and one end of the rotating shaft (4) extends to the bottom of the crank arm (3) and is fixedly connected to the crank arm (3); The bearing seats (6) are respectively arranged on both sides of the axial length direction of the rotating shaft (4) and are rotatably connected to the rotating shaft (4); the bearing seat (6) located on the side close to the crank arm (3) is spaced apart from the crank arm (3), and the two bearing seats (6) are integrally connected to the outer top of the valve box (1) and are at the same horizontal height; The first telescopic cylinder (5) is arranged on one side of the crank arm (3); the input end of the first telescopic cylinder (5) is hinged to the outside of the valve box (1); the output end of the first telescopic cylinder (5) is fixedly connected to the crank arm (3) and can drive the crank arm (3) to rotate around one side of the valve box (1); The wedging member of the wedging assembly is arranged on the box body of the valve box (1) and is slidably connected to the valve box (1), and can extend into the interior of the valve box (1) and abut against a part of the side surface of the valve plate (2).

2. The sealing valve for blast furnace according to claim 1, characterized in that: It also includes a cover plate (7), which is fixedly arranged on a side of the bearing seat (6) away from the crank arm (3) and is fixedly connected to the box body of the valve box (1), so that the bearing seat (6) can be fixed inside the cover plate (7) in a semi-enclosed manner.

3. The sealing valve for blast furnace according to claim 2, characterized in that: The cover plate (7) is a U-shaped groove plate as a whole, the groove opening of the cover plate (7) faces one side of the curved arm (3), and the bottom surface of the groove of the cover plate (7) is a smooth surface.

4. The sealing valve for blast furnace according to claim 1, characterized in that: The wedging assembly comprises a wedging block (8), a mounting seat (9), and a second telescopic cylinder (10); The wedge block (8) is arranged on the body of the valve box (1) and is slidably connected to the valve box (1) and can extend into the interior of the valve box (1); the inner end of the wedge block (8) contacts the two ends of the valve plate (2) in the plate length direction; The mounting seat (9) is fixedly arranged on the outside of the valve box (1) and is located below the wedge block (8); The input end of the second telescopic cylinder (10) is hinged to the upper end surface of the mounting seat (9), and the output end of the second telescopic cylinder (10) is fixedly connected to the outer end surface of the wedge block (8), so as to drive the wedge block (8) to perform reciprocating linear motion on the box body of the valve box (1).

5. The sealing valve for blast furnace according to claim 4, characterized in that: The inner end of the wedge block (8) is inclined, and the two ends of the valve plate (2) along the length direction of the plate are inclined. The inner end of the wedge block (8) fits with the end faces of the two ends of the valve plate (2) along the length direction of the plate.

6. The sealing valve for blast furnace according to claim 4, characterized in that: A sealing ring (11) is provided at the connection between the outer end of the wedge block (8) and the valve box (1), the inner wall of the sealing ring (11) is slidably connected to the outer wall of the wedge block (8), and the inner wall of the sealing ring (11) is fixedly connected to the inner wall of the valve box (1).

7. The sealing valve for blast furnace according to claim 1, characterized in that: The cross-sectional profile of the crank arm (3) is in the shape of a "6" as a whole, and the top of the crank arm (3) is in the shape of a hook. The hook is fixedly connected to one end of the first telescopic cylinder (5) and can drive the crank arm (3) to rotate.

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