A high temperature flange sealing gasket for blast furnace air supply device

Abstract

The present invention discloses a high-temperature flange sealing gasket for a blast furnace air supply device, the sealing gasket comprises a first steel wire ring and a second steel wire ring, a sealing material is filled between the first steel wire ring and the second steel wire ring, the centers of the first steel wire ring and the second steel wire ring coincide, and the first steel wire ring and the second steel wire ring are fixed along the circumference by a binding wire, the sealing gasket is installed on the inner side of a white steel gasket, and the sealing gasket is coaxially arranged with the white steel gasket and the air duct of the air supply device, the sealing material arranged between the first steel wire ring and the second steel wire ring gradually increases from the inside to the outside and fits each other, and the present invention designs high-temperature asbestos gaskets with different outer diameters according to the inner diameter sizes of the white steel gaskets of the blast furnace air supply device flange. The present invention is disposable, low in cost, can effectively solve the problem of high-temperature flange sealing, and can be made into different shapes according to different flange structures.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical equipment, and in particular relates to a high-temperature flange sealing gasket for a blast furnace air supply device. Background Art

[0002] In the smelting production of blast furnaces in the metallurgical industry, the use of high wind temperature can shorten the time from ore to smelting into pig iron, speed up the smelting process, increase pig iron production, and promote fuel ratio and cost reduction. It is currently the main technical measure to strengthen blast furnace smelting. The high-temperature flange sealing device is installed between the hot air surrounding pipe and the direct blowing pipe of the air supply equipment to the blast furnace. The hot air delivered to the blast furnace enters the blast furnace hearth through the hot air surrounding pipe and the direct blowing pipe. The effect of the high-temperature flange sealing device directly affects the effect of hot air delivery to the blast furnace and the normal production of the blast furnace. However, in actual production, the existing high-temperature flange sealing device is in a high-temperature state for a long time because the flange between the hot air surrounding pipe and the direct blowing pipe is inevitably deformed, causing the tuyere and the tuyere sleeve to warp up, causing the position of the air duct of the air supply device to change, resulting in the misalignment and loose bite of the transverse flange of the air duct and the lower flange of the middle section. Due to the low compression rate of the white steel pad, air seepage and leakage accidents occur, which may cause secondary air stoppage at the least and burn-through accidents of the air duct flange of the air supply device at the worst. The blast furnace is forced to reduce the air flow and stop the air flow, which destroys the continuity of blast furnace production.

[0003] In view of the above factors, a high-temperature flange sealing gasket for the blast furnace air supply device is specially designed, which can solve the sealing problem under the condition of misalignment of the upper and lower flanges, can solve the sealing problem under the condition of slight deformation of the flange, can play a role in curbing the uneven flange bite caused by the deformation of the middle section of the air supply device, and can play a role in curbing the misalignment of the gasket caused by the replacement operation. Summary of the invention

[0004] The object of the present invention is to provide a high-temperature flange sealing gasket for a blast furnace air supply device to solve the problems raised in the above-mentioned background technology.

[0005] The object of the present invention is achieved through the following technical solution: a high-temperature flange sealing gasket of a blast furnace air supply device, the sealing gasket comprising a first steel wire ring and a second steel wire ring, a sealing material is filled between the first steel wire ring and the second steel wire ring, the centers of the first steel wire ring and the second steel wire ring coincide, and the first steel wire ring and the second steel wire ring are fixed along the circumference by a binding wire;

[0006] The sealing gasket is installed inside the white steel gasket, and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially;

[0007] The sealing gasket is arranged between the transverse flange of the air duct and the lower flange of the middle section.

[0008] Furthermore, the sealing material disposed between the first wire ring and the second wire ring gradually increases in size from the inside to the outside and fits closely to each other.

[0009] Furthermore, the sealing material arranged between the first steel wire ring and the second steel wire ring includes a rubber asbestos board and an asbestos rope, the asbestos rope is arranged in several circles between the first steel wire ring and the second steel wire ring, and an annular rubber asbestos board is arranged between adjacent asbestos ropes.

[0010] Furthermore, the sealing material disposed between the first wire ring and the second wire ring includes an intermediate body made of metal asbestos wire and graphite braided or twisted and an asbestos rope, wherein a plurality of loops of the asbestos rope are disposed between the first wire ring and the second wire ring, and an annular intermediate body made of metal asbestos wire and graphite braided or twisted is disposed between adjacent asbestos ropes;

[0011] The thickness of the intermediate body formed by braiding or twisting the metal asbestos wire and graphite is smaller than the thickness of the asbestos rope.

[0012] Furthermore, the thickness of the asbestos rope is greater than the thickness of the rubber asbestos board and is controlled to be 2-5 mm.

[0013] Furthermore, the thickness of the sealing material is greater than the thickness of the white steel gasket and is controlled to be 2-5 mm.

[0014] Furthermore, the inner diameter of the sealing gasket is 120 mm larger than the air duct diameter of the air supply device.

[0015] Furthermore, the outer diameter of the sealing gasket is 50 mm smaller than the inner diameter of the white steel gasket.

[0016] Furthermore, the sealing gasket is treated by immersion in tetrafluoroethylene liquid.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The invention has a simple structure, is quick, convenient and safe to operate. When replacing the air supply device in a blast furnace, the device is placed on the inner side of the stainless steel gasket to achieve a double sealing effect. The invention can effectively solve the problem of high pressure 0.39MPa and air volume 5100m 3 / min, wind temperature 1200℃, oxygen enrichment 20000m 3 The high-temperature flange sealing under the condition of / h can solve the sealing problem under the condition of flange misalignment, can play a role in curbing the uneven flange bite caused by the deformation of the middle section of the air supply device, and can play a role in curbing the misalignment of the gasket caused by the replacement operation.

[0019] The present invention solves the problem of misalignment and loose engagement between the horizontal flange of the air duct and the lower flange of the middle section due to deformation of the middle section and upward warping of the air outlet and the large air outlet sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the present invention;

[0021] Figure 2 is a cross-sectional schematic diagram of a first embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the present invention and the stainless steel gasket;

[0023] Figure 4 is a cross-sectional schematic diagram of a second embodiment of the present invention;

[0024] Figure 5 is a cross-sectional schematic diagram of a third embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the overall connection of the blast furnace air supply device of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0029] like Figure 1-6As shown, a high-temperature flange sealing gasket of a blast furnace air supply device, the sealing gasket comprises a first steel wire ring 1 and a second steel wire ring 2, a sealing material 3 is filled between the first steel wire ring 1 and the second steel wire ring 2, the centers of the first steel wire ring 1 and the second steel wire ring 2 coincide, and the first steel wire ring 1 and the second steel wire ring 2 are fixed along the circumference by a binding wire 4;

[0030] The sealing gasket is installed on the inner side of the white steel gasket 5, and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially.

[0031] The sealing gasket is installed inside the white steel gasket 5 and is arranged between the horizontal flange of the air duct and the lower flange 6 of the middle section.

[0032] In order to facilitate sealing in cooperation with the white steel gasket 5 when in use, the sealing material 3 arranged between the first wire ring 1 and the second wire ring 2 gradually becomes larger from the inside to the outside and fits each other.

[0033] The sealing gasket is treated by immersing in tetrafluoroethylene liquid. Specific embodiment one:

[0035] The sealing gasket comprises a first steel wire ring 1 and a second steel wire ring 2, wherein a sealing material 3 is filled between the first steel wire ring 1 and the second steel wire ring 2, the centers of the first steel wire ring 1 and the second steel wire ring 2 coincide with each other, and the first steel wire ring 1 and the second steel wire ring 2 are fixed along their circumferences by a binding wire 4;

[0036] The sealing gasket is installed on the inner side of the white steel gasket 5, and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially.

[0037] The sealing material 3 disposed between the first steel wire ring 1 and the second steel wire ring 2 comprises an asbestos rope, and the asbestos rope is provided with a plurality of loops and disposed between the first steel wire ring 1 and the second steel wire ring 2 .

[0038] The thickness of the asbestos rope is greater than that of the rubber asbestos board and is controlled to be 2-5 mm.

[0039] The thickness of the sealing material 3 is greater than the thickness of the white steel gasket 5 and is controlled to be 2-5 mm.

[0040] The invention utilizes the compressibility of the asbestos rope and the thickness overlap of the white steel gasket to achieve a sealing effect.

[0041] The inner diameter of the sealing gasket is 120 mm larger than the diameter of the air passage of the air supply device.

[0042] The outer diameter of the sealing gasket is 50 mm smaller than the inner diameter of the white steel gasket 5 .

[0043] The invention places the sealing gasket on the inner side of the white steel gasket when replacing the air supply device of the blast furnace, which plays a double sealing role. The sealing gasket can effectively solve the problem of high pressure 0.39MPa and air volume 5100m 3 / min, wind temperature 1200℃, blast furnace oxygen enrichment 20000m 3 / h flange seal. Specific embodiment 2:

[0045] The sealing gasket comprises a first steel wire ring 1 and a second steel wire ring 2, wherein a sealing material 3 is filled between the first steel wire ring 1 and the second steel wire ring 2, the centers of the first steel wire ring 1 and the second steel wire ring 2 coincide with each other, and the first steel wire ring 1 and the second steel wire ring 2 are fixed along their circumferences by a binding wire 4;

[0046] The sealing gasket is installed on the inner side of the white steel gasket 5, and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially.

[0047] The sealing material 3 arranged between the first steel wire ring 1 and the second steel wire ring 2 includes a rubber asbestos board and an asbestos rope. The asbestos rope is arranged in several circles between the first steel wire ring 1 and the second steel wire ring 2, and an annular rubber asbestos board is arranged between adjacent asbestos ropes.

[0048] The thickness of the asbestos rope is greater than that of the rubber asbestos board and is controlled to be 2-5 mm.

[0049] The thickness of the sealing material 3 is greater than the thickness of the white steel gasket 5 and is controlled to be 2-5 mm.

[0050] The invention utilizes the compressibility of the asbestos rope and the thickness overlap of the white steel gasket to achieve a sealing effect.

[0051] The invention supports the structure by arranging an annular gold rubber asbestos plate as an intermediate body.

[0052] The inner diameter of the sealing gasket is 120 mm larger than the diameter of the air passage of the air supply device.

[0053] The outer diameter of the sealing gasket is 50 mm smaller than the inner diameter of the white steel gasket 5 .

[0054] The invention places the sealing gasket on the inner side of the white steel gasket when replacing the air supply device of the blast furnace, which plays a double sealing role. The sealing gasket can effectively solve the problem of high pressure 0.39MPa and air volume 5100m 3 / min, wind temperature 1200℃, blast furnace oxygen enrichment 20000m 3 / h flange seal. Specific embodiment three:

[0056] The sealing gasket comprises a first steel wire ring 1 and a second steel wire ring 2, wherein a sealing material 3 is filled between the first steel wire ring 1 and the second steel wire ring 2, the centers of the first steel wire ring 1 and the second steel wire ring 2 coincide with each other, and the first steel wire ring 1 and the second steel wire ring 2 are fixed along their circumferences by a binding wire 4;

[0057] The sealing gasket is installed on the inner side of the white steel gasket 5, and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially.

[0058] The sealing material 3 disposed between the first wire ring 1 and the second wire ring 2 comprises an intermediate body made of metal asbestos wire and graphite braided or twisted and an asbestos rope, wherein a plurality of loops of the asbestos rope are disposed between the first wire ring 1 and the second wire ring 2, and an annular intermediate body made of metal asbestos wire and graphite braided or twisted is disposed between adjacent asbestos ropes;

[0059] The invention supports the intermediate body made of annular metal asbestos wire and graphite braiding or twisting.

[0060] The thickness of the intermediate body formed by braiding or twisting the metal asbestos wire and graphite is smaller than the thickness of the asbestos rope.

[0061] The invention utilizes the compressibility of the asbestos rope and the thickness overlap of the white steel gasket to achieve a sealing effect.

[0062] The inner diameter of the sealing gasket is 120 mm larger than the diameter of the air passage of the air supply device.

[0063] The outer diameter of the sealing gasket is 50 mm smaller than the inner diameter of the white steel gasket 5 .

[0064] The invention places the sealing gasket on the inner side of the white steel gasket when replacing the air supply device of the blast furnace, which plays a double sealing role. The sealing gasket can effectively solve the problem of high pressure 0.39MPa and air volume 5100m 3 / min, wind temperature 1200℃, blast furnace oxygen enrichment 20000m 3 / h flange seal.

[0065] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high temperature flange sealing gasket for a blast furnace air supply device, characterized in that: The sealing gasket comprises a first steel wire ring (1) and a second steel wire ring (2), wherein a sealing material (3) is filled between the first steel wire ring (1) and the second steel wire ring (2), the centers of the first steel wire ring (1) and the second steel wire ring (2) coincide with each other, and the first steel wire ring (1) and the second steel wire ring (2) are fixed along their circumferences by a binding wire (4); The sealing gasket is installed on the inner side of the white steel gasket (5), and the sealing gasket, the white steel gasket and the air duct of the air supply device are arranged coaxially; The sealing gasket is arranged between the transverse flange of the air duct and the lower flange (6) of the middle section; The sealing material (3) provided between the first wire ring (1) and the second wire ring (2) gradually increases in size from the inside to the outside and fits each other; The sealing material (3) disposed between the first steel wire ring (1) and the second steel wire ring (2) comprises a rubber asbestos sheet and an asbestos rope, wherein a plurality of loops of the asbestos rope are disposed between the first steel wire ring (1) and the second steel wire ring (2), and an annular rubber asbestos sheet is disposed between adjacent asbestos ropes; The thickness of the asbestos rope is greater than that of the rubber asbestos board and is controlled to be 2-5mm; The thickness of the sealing material (3) is greater than the thickness of the white steel gasket (5) and is controlled to be 2-5 mm; The outer diameter of the sealing gasket is 50 mm smaller than the inner diameter of the white steel gasket (5).

2. A high temperature flange sealing gasket for a blast furnace air supply device according to claim 1, characterized in that: The inner diameter of the sealing gasket is 120 mm larger than the diameter of the air passage of the air supply device.

3. A high temperature flange sealing gasket for a blast furnace air supply device according to claim 2, characterized in that: The sealing gasket is treated by immersing in tetrafluoroethylene liquid.

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