Flange sealing structure for furnace nose

Abstract

The utility model belongs to the technical field of cold rolling coating equipment, and particularly relates to a flange sealing structure for a furnace nose head, which comprises a first flange surface arranged at the top of the furnace nose head and sealing parts arranged on two sides of the nitrogen tank, the sealing component comprises a polytetrafluoroethylene sealing gasket and a ceramic fiber rope, the polytetrafluoroethylene sealing gasket is located on the outer side of the nitrogen tank, and the ceramic fiber rope is located on the inner side of the nitrogen tank. The nitrogen groove is formed in the first flange face, when upper equipment is connected, nitrogen can be injected into the nitrogen groove, the nitrogen sealing and cooling effects are achieved, the polytetrafluoroethylene sealing gasket is arranged for sealing, and meanwhile the ceramic fiber rope is installed on the inner side of the nitrogen groove to isolate high-temperature gas in the furnace. And the effect of reducing the temperature is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold rolling coating equipment, and in particular relates to a sealing structure for a furnace nose flange. Background Art

[0002] The furnace nose is connected to the upper equipment by flange connection, and the flange connection surface is a plane. In the galvanizing process, the main purpose of the furnace nose head is to protect the strip steel and guide it into the zinc pot. The inside of the furnace nose is in an oxygen-free state and is very sensitive to oxygen penetrating from the outside. Quality problems such as galvanized sheet leakage are caused by poor sealing at the furnace nose head. The flange of the furnace nose head and the flange of the flow channel section are flat-surface combined and sealed, and are fastened with bolts through holes. The furnace nose head is installed at the end of the annealing furnace and extends into the zinc / aluminum pot. The temperature can reach above 600°C during normal operation. Currently, copper sealing pads are used as seals.

[0003] Long-term high temperature environment causes the furnace nose flange to bend and deform. When replacing the furnace nose, it is difficult to install. At the same time, the copper gasket cannot compensate for the flange deformation, resulting in leakage, causing air to enter the furnace nose, causing product dezincification and degradation. For this reason, an improved design for the furnace nose flange sealing structure is proposed. Utility Model Content

[0004] In view of the above-mentioned deficiencies existing in the prior art, the utility model provides a sealing structure for a furnace nose flange to solve the above-mentioned problems in the background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A furnace nose flange sealing structure comprises a first flange surface arranged on the top of the furnace nose, a nitrogen groove is formed on the first flange surface, and also comprises sealing components arranged on both sides of the nitrogen groove, the sealing components comprise a polytetrafluoroethylene sealing pad and a ceramic fiber rope, the polytetrafluoroethylene sealing pad is located on the outside of the nitrogen groove, and the ceramic fiber rope is located on the inside of the nitrogen groove.

[0007] By adopting the above structural design, a nitrogen tank is opened on the first flange surface, and nitrogen can be injected into the nitrogen tank when the upper equipment is connected to form a nitrogen seal and cooling effect, and a polytetrafluoroethylene gasket is set for sealing, and a ceramic fiber rope is installed on the inner side of the nitrogen tank to isolate the high-temperature gas in the furnace, so as to achieve the effect of lowering the temperature.

[0008] Furthermore, the nitrogen tank is in a closed ring shape.

[0009] Furthermore, the first flange surface is provided with a first installation groove for installing a ceramic fiber rope and a second installation groove for installing a polytetrafluoroethylene sealing gasket. The first flange surface is also provided with a bolt hole, and the bolt hole is located outside the second installation groove.

[0010] Furthermore, the depth of the second mounting groove is less than the thickness of the polytetrafluoroethylene sealing gasket.

[0011] Furthermore, it also includes a copper gasket, which is coaxially arranged with the bolt hole and is fastened by bolts to ensure that the ceramic fiber rope and the polytetrafluoroethylene sealing gasket are within the compression range when the flange is fastened.

[0012] Furthermore, it also includes a second flange surface connected to the first flange surface by bolts, and a nitrogen injection hole is opened on the second flange surface. When the first flange surface and the second flange surface are connected, the nitrogen injection hole is connected to the nitrogen tank.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] A nitrogen tank is set on the first flange surface. When the upper equipment is connected, nitrogen can be injected into the nitrogen tank to form a nitrogen seal and cooling effect. A polytetrafluoroethylene gasket is set for sealing. At the same time, a ceramic fiber rope is installed on the inner side of the nitrogen tank to isolate the high-temperature gas in the furnace. The effect of lowering the temperature is achieved. By lowering the flange temperature and eliminating the deformation of the flange due to high temperature, the purpose of improving the efficiency of replacing the furnace nose and ensuring the flange sealing is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a furnace nose flange sealing structure of the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0017] Figure 3 It is a structural schematic diagram of the first flange surface in an embodiment of a furnace nose flange sealing structure of the utility model;

[0018] Figure 4 This is a schematic diagram of a sealing structure installation for a furnace nose flange of the utility model;

[0019] The reference numerals in the drawings of the specification include:

[0020] A furnace nose (01), a first flange surface (1), a first installation groove (11), a nitrogen groove (12), a second installation groove (13), a bolt hole (14), a ceramic fiber rope (2), a polytetrafluoroethylene sealing gasket (3), a copper gasket (4), a second flange surface (5), a nitrogen injection hole (51), and a bolt (6). DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0023] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] like Figure 1-4As shown, the utility model. Specifically, a sealing structure for a furnace nose flange includes a first flange surface 1 arranged at the top of the furnace nose 01, a nitrogen groove 12 is provided on the first flange surface 1, and also includes sealing components arranged on both sides of the nitrogen groove 12, the sealing components include a polytetrafluoroethylene gasket 3 and a ceramic fiber rope 2, the polytetrafluoroethylene gasket 3 is located on the outside of the nitrogen groove 12, and the ceramic fiber rope 2 is located on the inside of the nitrogen groove 12. A nitrogen groove 12 is provided on the first flange surface 1, and nitrogen can be injected into the nitrogen groove 12 when the upper equipment is connected to form a nitrogen seal and cooling effect, and a polytetrafluoroethylene gasket 3 is provided for sealing, and a ceramic fiber rope 2 is installed on the inner side of the nitrogen groove 12 to isolate the high-temperature gas in the furnace. Achieve the effect of lowering the temperature. Among them, the nitrogen groove 12 is a closed ring.

[0027] In this example, the first flange surface 1 is provided with a first installation groove 11 for installing the ceramic fiber rope 2 and a second installation groove 13 for installing the polytetrafluoroethylene gasket 3. The first flange surface 1 is also provided with a bolt hole 14, which is located outside the second installation groove 13. The depth of the second installation groove 13 is less than the thickness of the polytetrafluoroethylene gasket 3.

[0028] The flange sealing structure also includes a copper gasket 4, which is coaxially arranged with the bolt hole 14 and is fastened by bolts 6. Ensure that the ceramic fiber rope 2 and the polytetrafluoroethylene sealing gasket 3 are within the compression range when the flange is fastened. The flange sealing structure also includes a second flange surface 5 connected to the first flange surface 1 by bolts 6, and a nitrogen injection hole 51 is opened on the second flange surface 5. When the first flange surface 1 and the second flange surface 5 are connected, the nitrogen injection hole 51 is connected to the nitrogen tank 12.

[0029] After the implementation, the temperature at the furnace nose flange can be reduced to below 280℃, and the polytetrafluoroethylene gasket can work normally. The flange is well sealed without leakage.

[0030] The above are only embodiments of the utility model, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the prior art in the field, and have the ability to apply conventional experimental means before the date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A furnace nose flange sealing structure, comprising a first flange surface (1) arranged on the top of the furnace nose (01), wherein a nitrogen groove (12) is provided on the first flange surface (1), characterized in that: It also includes sealing components arranged on both sides of the nitrogen tank (12), the sealing components including a polytetrafluoroethylene sealing pad (3) and a ceramic fiber rope (2), the polytetrafluoroethylene sealing pad (3) being located on the outside of the nitrogen tank (12), and the ceramic fiber rope (2) being located on the inside of the nitrogen tank (12).

2. A furnace nose flange sealing structure as claimed in claim 1, characterized in that: The nitrogen tank (12) is in the shape of a closed ring.

3. A furnace nose flange sealing structure as claimed in claim 1, characterized in that: The first flange surface (1) is provided with a first installation groove (11) for installing a ceramic fiber rope (2) and a second installation groove (13) for installing a polytetrafluoroethylene sealing gasket (3). The first flange surface (1) is also provided with a bolt hole (14), and the bolt hole (14) is located outside the second installation groove (13).

4. A furnace nose flange sealing structure as claimed in claim 3, characterized in that: The depth of the second mounting groove (13) is less than the thickness of the polytetrafluoroethylene sealing gasket (3).

5. A furnace nose flange sealing structure as claimed in claim 3, characterized in that: It also includes a copper gasket (4), wherein the copper gasket (4) and the bolt hole (14) are coaxially arranged and are fastened and connected by a bolt (6).

6. A sealing structure for a furnace nose flange as claimed in claim 5, characterized in that: The invention also comprises a second flange surface (5) connected to the first flange surface (1) by means of bolts (6); a nitrogen injection hole (51) is provided on the second flange surface (5); when the first flange surface (1) and the second flange surface (5) are connected, the nitrogen injection hole (51) is in communication with the nitrogen tank (12).

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