Novel external sealing device for flue gate valve

Abstract

The utility model belongs to the technical field of sealing inserting plates, and particularly relates to a novel flue inserting plate valve external sealing device which comprises a lifting frame and a sealing inserting plate, the sealing inserting plate is arranged in an inner cavity of the lifting frame in a sliding mode, a hydraulic rod is installed on the upper surface of the lifting frame, and a piston rod of the hydraulic rod penetrates through the top cavity wall of the lifting frame. The end part of a piston rod of the hydraulic rod is connected with the top surface of the sealing insertion plate; first pushing frames are integrally formed on the surfaces of the two sides of the lifting frame. The movable sealing plate expands outwards under pushing of the pushing bevel edge, the two ends of the surface of the movable sealing plate abut against the surfaces of the graphite nickel wire packings, the sealing effect on a flue can be improved, meanwhile, the graphite nickel wire packings are arranged on the surfaces of the two sides of the movable sealing plate respectively, contact with high-temperature flue gas is reduced, the service life of sealing materials can be prolonged, and the sealing effect is improved. And the graphite nickel wire packing is alternately operated, so that the graphite nickel wire packing can be quickly replaced in a non-stop state.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing plug-in plates, in particular to a novel external sealing device for a flue plug-in plate valve. Background Art

[0002] Slotted damper doors are widely used in many industrial fields to isolate smoke and are crucial for ensuring safe production and process system performance. Depending on the functional requirements of the process system, these doors are often installed in harsh environments such as those subject to high dust, high temperature, high moisture content, and highly corrosive gases.

[0003] The invention patent, currently published with the publication number CN219119833U, discloses a high-temperature flue flapper valve for underground flues. This invention belongs to the field of valve technology and includes a lower frame, an upper frame, a valve plate housing, a heat-resistant layer, a fixing frame, a power unit, and a connecting device. The lower frame is placed in the underground flue and connected to the flue. The upper frame is fixed to the lower frame. The heat-resistant layer is fixed in the middle of the valve plate housing. The fixing frame is connected to the valve plate housing. The connecting device is connected to the fixing frame, and the connecting device is connected to the upper frame. The high-temperature flue flapper valve for underground flues of this utility model can ensure sealing performance in high-temperature flue environments. It also has a simple structure, is easy to manufacture, has a long service life, is low in cost, and has strong scalability.

[0004] After a period of use, the sealing ring of the existing flue plug-in valve is squeezed and deformed by the valve plate, which will affect the sealing effect of the valve plate. At the same time, the sealing materials are arranged on the main frame of the flue valve and are in the flue. They cannot be repaired or replaced when the boiler equipment is in operation. The sealing materials are fixed on the main frame and are in contact with high-temperature flue gas for a long time, which greatly shortens their service life and speeds up the replacement frequency. In order to solve the above problems, this application proposes a new type of external sealing device for flue plug-in valve. Utility Model Content

[0005] (1) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the present invention proposes a new type of external sealing device for the flue plug-in valve, which expands the movable sealing plate outward under the push of the bevel, and the two ends of the surface of the movable sealing plate will abut against the surface of the graphite nickel wire packing, which can improve the sealing effect of the flue. At the same time, the graphite nickel wire packing is respectively arranged on the two side surfaces of the movable sealing plate to reduce the contact with the high-temperature flue gas, which can increase the service life of the sealing material. By alternately operating the graphite nickel wire packing, the graphite nickel wire packing can be quickly replaced without stopping the machine, so as to solve the problems raised in the background technology.

[0007] (2) Technical solution

[0008] To solve the above technical problems, the present invention provides a novel external sealing device for a flue gate valve, comprising a lifting frame and a sealing gate. The sealing gate is slidably arranged in the inner cavity of the lifting frame. A hydraulic rod is installed on the upper surface of the lifting frame. The piston rod of the hydraulic rod passes through the top cavity wall of the lifting frame, and the end of the piston rod of the hydraulic rod is connected to the top surface of the sealing gate.

[0009] A push frame No. 1 is integrally formed on both sides of the lifting frame, and a movable sealing plate is movably provided on both sides of the lifting frame. A push frame No. 2 is integrally formed on the inner wall surface of the movable sealing plate. The push frame No. 2 and the push frame No. 1 are equidistantly distributed from top to bottom, and the installation angle of the push frame No. 2 is opposite to that of the push frame No. 1;

[0010] Graphite nickel wire packings are movably installed on both ends of the surface of the movable sealing plate.

[0011] Preferably, guide grooves are provided on both sides of the inner wall of the lifting frame, and both ends of the sealing plug plate and the movable sealing plate are slidably connected to the guide grooves.

[0012] Preferably, the cross-sections of the No. 1 push rack and the No. 2 push rack are both right-angled triangle structures, and the No. 1 push rack and the No. 2 push rack are both provided with transverse edges and push oblique edges.

[0013] Preferably, during the lifting process of the sealing insert plate, the movable sealing plate naturally droops under the action of gravity, and the lateral edges of the No. 1 push frame and the No. 2 push frame are fitted together.

[0014] Preferably, when the sealing insert plate descends, the push bevels on the No. 1 push frame and the No. 2 push frame fit together.

[0015] Preferably, both ends of the two side surfaces of the lifting frame are provided with adjustment holes, and the adjustment holes are evenly distributed from top to bottom.

[0016] Preferably, the inner cavity of the adjusting wire hole is threadedly connected to an adjusting screw, one end of the adjusting screw is connected to a rotating handwheel, the other end of the adjusting screw is rotatably connected to the push plate, and the graphite nickel wire packing is fixed on the surface of the push plate.

[0017] The above technical solution of the utility model has the following beneficial technical effects:

[0018] 1. In the present invention, after the sealing plate descends, the bottom of the movable sealing plate first contacts the bottom of the lifting frame. When the sealing plate continues to descend, the pushing bevel of the No. 1 push frame squeezes the pushing bevel on the No. 2 push frame, and the movable sealing plate can be expanded outward under the push of the pushing bevel. The two ends of the movable sealing plate surface will abut against the surface of the graphite nickel wire packing, which can improve the sealing effect of the flue.

[0019] 2. In the present invention, the adjusting screw supports the push plate and fixes the graphite nickel wire packing. The graphite nickel wire packing is respectively arranged on the surfaces of both sides of the movable sealing plate. The rotating handwheel drives the adjusting screw to rotate. The adjusting screw drives the push plate away from the movable sealing plate under the action of the surface thread, which makes room for the disassembly and assembly of the graphite nickel wire packing. By alternately operating the graphite nickel wire packing, the graphite nickel wire packing can be quickly replaced without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a novel external sealing device for a flue flapper valve according to the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of an external sealing device for a novel flue flapper valve according to the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a movable sealing plate of an external sealing device for a novel flue plug-in valve of the utility model;

[0023] Figure 4 This is a schematic diagram of the graphite nickel wire packing adjustment structure of an external sealing device for a new type of flue plug-in valve in the utility model.

[0024] Reference numerals:

[0025] 1. Lifting frame; 2. Guide groove; 3. Sealing plate; 4. Hydraulic rod; 5. Movable sealing plate; 6. Push frame No. 1; 7. Push frame No. 2; 8. Horizontal edge; 9. Pushing bevel edge; 10. Push plate; 11. Graphite nickel wire packing; 12. Adjusting thread hole; 13. Adjusting screw; 14. Rotating handwheel. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0027] like Figure 1-4 As shown, the present invention proposes a novel external sealing device for a flue gate valve, comprising a lifting frame 1 and a sealing gate 3. The sealing gate 3 is slidably arranged in the inner cavity of the lifting frame 1. A hydraulic rod 4 is installed on the upper surface of the lifting frame 1. The piston rod of the hydraulic rod 4 passes through the top cavity wall of the lifting frame 1, and the end of the piston rod of the hydraulic rod 4 is connected to the top surface of the sealing gate 3.

[0028] Both sides of the lifting frame 1 are integrally formed with a No. 1 push frame 6, and both sides of the lifting frame 1 are movably provided with a movable sealing plate 5, and the inner wall surface of the movable sealing plate 5 is integrally formed with a No. 2 push frame 7, and the No. 2 push frame 7 and the No. 1 push frame 6 are equidistantly distributed from top to bottom, and the No. 2 push frame 7 is installed at an opposite angle to the No. 1 push frame 6, and the cross-sections of the No. 1 push frame 6 and the No. 2 push frame 7 are both right-angled triangle structures, and the No. 1 push frame 6 and the No. 2 push frame 7 are provided with a horizontal edge 8 and a pushing hypotenuse 9. During the lifting process of the sealing plug plate 3, the movable sealing plate 5 naturally droops under the action of gravity, and the horizontal edges 8 on the No. 1 push frame 6 and the No. 2 push frame 7 fit together. When the sealing plug plate 3 descends, the pushing hypotenuse 9 on the No. 1 push frame 6 and the No. 2 push frame 7 fit together;

[0029] Graphite nickel wire packings 11 are movably mounted on both ends of the surface of the movable sealing plate 5 .

[0030] When the sealing plate 3 is lowered, the bottom of the movable sealing plate 5 will first contact the bottom of the lifting frame 1. When the sealing plate 3 continues to descend, the pushing bevel 9 on the No. 2 pushing frame 7 is squeezed by the pushing bevel 9 of the No. 1 pushing frame 6. The movable sealing plate 5 can be expanded outwards under the push of the pushing bevel 9. The two ends of the surface of the movable sealing plate 5 will abut against the surface of the graphite nickel wire packing 11, which can improve the sealing effect of the flue.

[0031] In this embodiment, if Figure 2 As shown, guide grooves 2 are provided on both sides of the inner wall of the lifting frame 1 , and both ends of the sealing plug plate 3 and the movable sealing plate 5 are slidably connected to the guide grooves 2 .

[0032] It should be noted that the guide groove 2 can guide the lifting and lowering of the sealing insert plate 3 and the movable sealing plate 5.

[0033] In this embodiment, if Figure 3 and Figure 4 As shown, both ends of the two side surfaces of the lifting frame 1 are provided with adjustment holes 12, and the adjustment holes 12 are equidistantly distributed from top to bottom. The inner cavities of the adjustment holes 12 are threadedly connected to adjustment screws 13, one end of the adjustment screws 13 is connected to a rotating handwheel 14, and the other end of the adjustment screws 13 is rotatably connected to the push plate 10, and the graphite nickel wire packing 11 is fixed to the surface of the push plate 10.

[0034] It should be noted that rotating the handwheel 14 drives the adjusting screw 13 to rotate, and the adjusting screw 13 will drive the push plate 10 away from the movable sealing plate 5 under the action of the surface thread, which can make room for the disassembly and assembly of the graphite nickel wire packing 11. By alternately operating the graphite nickel wire packing 11, the graphite nickel wire packing 11 can be quickly replaced without stopping the machine.

[0035] When the sealing plate 3 is lowered, the bottom of the movable sealing plate 5 will contact the bottom of the lifting frame 1. When the sealing plate 3 is lowered, the pushing bevel 9 of the No. 1 pushing frame 6 will squeeze the pushing bevel 9 on the No. 2 pushing frame 7. Pushed by the edge 9, the movable sealing plate 5 expands outward, and both ends of the surface of the movable sealing plate 5 will abut against the surface of the graphite nickel wire packing 11, which can improve the sealing effect of the flue. The adjusting screw 13 supports the push plate 10 and can fix the graphite nickel wire packing 11. The graphite nickel wire packing 11 is respectively arranged on the surfaces of both sides of the movable sealing plate 5. The rotating handwheel 14 drives the adjusting screw 13 to rotate. The adjusting screw 13 will drive the push plate 10 away from the movable sealing plate 5 under the action of the surface thread, which can make space for the disassembly and assembly of the graphite nickel wire packing 11. By alternately operating the graphite nickel wire packing 11, the graphite nickel wire packing 11 can be quickly replaced without stopping the machine.

[0036] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims or their equivalents.

Claims

1. A novel external sealing device for a flue plate valve, comprising a lifting frame (1) and a sealing plate (3), wherein the sealing plate (3) is slidably arranged in the inner cavity of the lifting frame (1), and is characterized in that: A hydraulic rod (4) is installed on the upper surface of the lifting frame (1), the piston rod of the hydraulic rod (4) passes through the top cavity wall of the lifting frame (1), and the end of the piston rod of the hydraulic rod (4) is connected to the top surface of the sealing plug plate (3); A first push frame (6) is integrally formed on both sides of the lifting frame (1), and a movable sealing plate (5) is movably provided on both sides of the lifting frame (1). A second push frame (7) is integrally formed on the inner wall surface of the movable sealing plate (5), and the second push frame (7) and the first push frame (6) are equidistantly distributed from top to bottom, and the installation angles of the second push frame (7) and the first push frame (6) are opposite; Graphite nickel wire packings (11) are movably mounted on both ends of the surface of the movable sealing plate (5).

2. A novel external sealing device for a flue valve according to claim 1, characterized in that: Guide grooves (2) are provided on both sides of the inner wall of the lifting frame (1), and both ends of the sealing insert plate (3) and the movable sealing plate (5) are slidably connected to the guide grooves (2).

3. A novel external sealing device for a flue valve according to claim 2, characterized in that: The cross sections of the first push frame (6) and the second push frame (7) are both right-angled triangle structures, and the first push frame (6) and the second push frame (7) are both provided with a transverse edge (8) and a pushing oblique edge (9).

4. A novel external sealing device for a flue valve according to claim 3, characterized in that: During the lifting process of the sealing insert plate (3), the movable sealing plate (5) naturally droops under the action of gravity, and the transverse edges (8) on the No. 1 push frame (6) and the No. 2 push frame (7) are fitted together.

5. A novel external sealing device for a flue valve according to claim 4, characterized in that: When the sealing insert plate (3) descends, the push bevels (9) on the No. 1 push frame (6) and the No. 2 push frame (7) fit together.

6. A novel external sealing device for a flue valve according to claim 5, characterized in that: Adjustment holes (12) are provided at both ends of the two side surfaces of the lifting frame (1), and the adjustment holes (12) are distributed in an equidistant manner from top to bottom.

7. A novel external sealing device for a flue valve according to claim 6, characterized in that: The inner cavity of the adjusting wire hole (12) is threadedly connected to an adjusting screw rod (13), one end of the adjusting screw rod (13) is connected to a rotating hand wheel (14), and the other end of the adjusting screw rod (13) is rotatably connected to the push plate (10), and the graphite nickel wire packing (11) is fixed on the surface of the push plate (10).

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