Novel sealing structure of large-diameter mortise flange

Abstract

The embodiment of the utility model provides a novel sealing structure of a large-diameter mortise flange, and relates to the technical field of sealing structures. The sealing structure comprises a plurality of flexible graphite strips which are arranged in a bent mode and arranged in a multi-circle-layer mode. And lapped seams between the flexible graphite strips in the adjacent ring layers are arranged in a staggered manner. The flexible graphite strip is flexible in installation process, can be replaced in time after being damaged, and is short in manufacturing time, high in adaptability, capable of meeting the size requirements of various sealing surfaces, corrosion-resistant and high-temperature-resistant. The sealing structure provided by the utility model can be applied to a negative pressure system and a low pressure system, and meets the use requirements of sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing structure technical field, specifically, relate to a novel big diameter mortise flange's sealing structure. BACKGROUND

[0002] The existing mortise sealing surface sealing washer mainly includes metal winding washer, polytetrafluoroethylene washer, graphite composite washer and the like pre-processed finished product washer, when the flange diameter is less than DN1000, the finished product washer production cost is lower, and the installation is convenient, and the sealing performance is good, when the mortise flange diameter is greater than DN1000, along with the diameter increase, the finished product washer production cost is rapidly long high, and the production processing cycle is long, its damage rate is high in the transportation, movement, installation process, and is not repairable after damage, and increases the production cost.

[0003] In view of this, the present application is also proposed. UTILITY MODEL CONTENT

[0004] The utility model discloses a novel big diameter mortise flange's sealing structure can solve the above-mentioned technical problem.

[0005] The embodiment of the utility model can be realized as follows:

[0006] Firstly, the embodiment of the utility model provides a novel sealing structure, and the sealing structure comprises multiple flexible graphite strips arranged in multiple layers and placed in a curved manner.

[0007] The lap joints between the flexible graphite strips in adjacent layers are staggered.

[0008] In the optional implementation, the lengths of the multiple flexible graphite strips are the same or different; and the multiple flexible graphite strips are overlapped to form a layer along the length direction of the flexible graphite strip.

[0009] In the optional implementation, the width of the flexible graphite strip is 135%-180% of the height of the place to be sealed.

[0010] In the optional implementation, the width of the flexible graphite strip is 150%-180% of the height of the place to be sealed.

[0011] In the optional implementation, the thickness of the flexible graphite strip is 0.5mm-4.5mm.

[0012] In the optional implementation, the thickness of the flexible graphite strip is 1.0mm-3.0mm.

[0013] In the optional implementation, the sealing structure is placed in the groove of the groove flange, and the lap joints between the flexible graphite strips in adjacent layers of the sealing structure are staggered.

[0014] The utility model discloses beneficial effect includes:

[0015] The utility model discloses an embodiment provides novel big diameter tenon and groove flange's sealing structure, replace with flexible graphite board field fabrication installation, greatly reduce production cost, and installation process is flexible, can replace in time after damaging, and the production time is short, and the adaptability is strong, adapts to various sealing surface size requirement, corrosion -resistant, high temperature -resistant. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed in the embodiment, should understand, the following drawing only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain other related drawings according to these drawings.

[0017] Figure 1 The sealing structure provided for the embodiment is the structure schematic diagram under the first visual angle;

[0018] Figure 2 The sealing structure provided for the embodiment is the structure schematic diagram under the second visual angle;

[0019] Figure 3 The structure schematic diagram of flexible graphite board provided for the embodiment;

[0020] Figure 4 The structure schematic diagram of the sealing structure in the big diameter tenon and groove flange under the first visual angle.

[0021] Icon: 100-flexible graphite strip;101-width;102-thickness;103-lap joint;200-flexible graphite plate;400-big diameter tenon and groove flange;401-tenon flange;402-nut;403-gasket;404-to be sealed;405-groove flange. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the following will be combined with the drawing in the embodiment of the utility model, and the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment is the embodiment of the utility model part, instead of all the embodiments. The components of the embodiment of the utility model described and shown in the drawing here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0024] It should be noted that: similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, only for the convenience of describing the application and simplifying the description, and not to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the application.

[0026] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.

[0028] First embodiment

[0029] Please refer to Figure 1 and Figure 2 The embodiment provides a novel large-diameter tenon and groove flange sealing structure, which comprises a plurality of flexible graphite strips 100 arranged in multiple layers and filling the sealing position; the overlapping joints 103 between the flexible graphite strips 100 in adjacent layers are arranged in a staggered manner, wherein, Figure 1 Specifically, it is a cross-sectional structure diagram of the sealing surface perpendicular direction, Figure 2 Specifically, it is a cross-sectional structure diagram of the sealing surface parallel direction.

[0030] It should be noted that flexible graphite has good corrosion resistance, good high temperature resistance, its good flexibility and compression ductility make it have good sealing performance, and the flexible graphite strip 100 is a flexible graphite plate 200 which is reasonably cut according to the size of the sealing position 404 on site.

[0031] The embodiment adopts flexible graphite plate 200 to replace finished gasket, which has the following characteristics: greatly reducing production cost, flexible installation process, timely replacement after damage, adapting to various sealing surface size requirements, short production time, strong adaptability, corrosion resistance and high temperature resistance.

[0032] Please refer to Figure 3 Specifically, the flexible graphite plate 200 is cut into flexible graphite strips 100 in the embodiment, the width of each flexible graphite strip is measured and marked in the width direction of the flexible graphite plate 200, and then the flexible graphite plate 200 is cut along the length direction.

[0033] It should be noted that the length of the flexible graphite strip 100 may or may not match the circumference of the to-be-sealed portion 404, so the length of the flexible graphite strip may be the same or different; in the embodiment, a plurality of flexible graphite strips are overlapped to form a layer along the length direction of the flexible graphite strip. The overlap joint 103 should be staggered during installation, so that there is no gap at the overlap joint 103, and the sealing performance of the to-be-sealed portion 404 meets the requirements.

[0034] The flexible graphite strip 100 is placed in the to-be-sealed portion 404 along the length direction, that is, the width direction of the flexible graphite strip 100 is perpendicular to the bottom surface of the to-be-sealed portion 404, the width 101 direction of the flexible graphite strip 100 is parallel to the depth direction of the to-be-sealed portion 404, and the thickness 102 direction of the flexible graphite strip 100 is perpendicular to the depth direction of the to-be-sealed portion 404.

[0035] In other embodiments of the present application, the width 101 of the flexible graphite strip 100 can also be prepared and cut according to actual needs, and reasonable selection can be made according to actual conditions.

[0036] Specifically, the widths 101 of the plurality of flexible graphite strips 100 are the same, which is 165% of the height of the to-be-sealed portion 404, and the thickness 102 of the flexible graphite strip 100 is 2.0 mm. In other embodiments of the present application, the width 101 of the flexible graphite strip 100 can be reasonably cut according to actual needs.

[0037] After the flexible graphite strip 100 fills the to-be-sealed portion 404 and the overlap joint 103 between the flexible graphite strips 100 in the adjacent layers is placed, the flexible graphite strip is pressed and compacted inward along the vertical direction of the sealing surface, and is arranged flat.

[0038] Specifically, after the flexible graphite strip 100 is completely installed, the flexible graphite strip is first pressed and compacted inward along the vertical direction of the sealing surface, and then the upper surface thereof is gently knocked along the periphery with a tool, and the excess part is removed.

[0039] Then, normal installation and fastening are performed according to the installation process of the to-be-sealed structure.

[0040] It should be noted that the sealing structure provided in the embodiment can be applied to the to-be-sealed position 404 in the large-diameter tongue-and-groove flange 400, the negative pressure system and the low-pressure system.

[0041] Please refer to Figure 4 The installation and use steps of the sealing structure in the large-diameter tongue-and-groove flange 400 are as follows:

[0042] (1) According to the size of the groove flange 405 in the tongue-and-groove flange 405, the flexible graphite plate 200 with a thickness 102 of 2 mm is cut on site, and the specific width 101 is 165% of the height of the to-be-sealed position 404 in the groove flange 405; wherein the to-be-sealed position 404 in the groove flange 405 is the groove of the groove flange.

[0043] (2) The cut flexible graphite strips 100 are vertically arranged and installed on the to-be-sealed position 404 of the groove flange 405. Since the length of the sealing strip and the circumference of the flange do not necessarily match, the lap joints 103 should be staggered during installation, and the lap joints should not be left empty.

[0044] It should be noted that the flexible graphite plate 200 is cut on site to install the flexible graphite strip 100, the installation process is flexible, damaged flexible graphite strips can be replaced in time, and only the damaged flexible graphite strips need to be replaced, the production time is short, the adaptability is strong, and the production cost is greatly reduced.

[0045] (3) After tightly filling the to-be-sealed position 404 of the tongue-and-groove with the sealing strip, first press and compact the sealing strip inward along the vertical direction of the sealing surface with hands, then gently knock the upper surface of the sealing strip along the periphery with a tool, arrange and flatten, and remove the excess part. Then, the tongue flange 401 and the groove flange 405 are butt-jointed, and then the matched nuts 402 and gaskets 403 are all installed.

[0046] (4) Perform normal installation and fastening according to the flange installation process.

[0047] In summary, the sealing structure of the novel large-diameter tongue-and-groove flange provided in the embodiment is replaced by a flexible graphite plate produced and installed on site, greatly reducing the production cost, flexible in the installation process, damaged flexible graphite strips can be replaced in time, the production time is short, the adaptability is strong, and various sealing surface size requirements can be met, corrosion resistant and high temperature resistant. The sealing structure can be used in the negative pressure system and the low-pressure system to meet the sealing performance requirements.

[0048] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. A seal structure for a large diameter dovetail flange, characterized by, The sealing structure comprises a plurality of flexible graphite strips arranged in a plurality of layers in a curved manner; The overlapping joint gaps between the flexible graphite strips in adjacent layers are staggered.

2. The seal structure of claim 1, wherein A plurality of the flexible graphite strips are overlapped to form a layer along the length direction of the flexible graphite strips.

3. The seal structure of claim 1, wherein The width of the flexible graphite strip is 135%-180% of the height of the sealing position.

4. The seal structure of claim 3, wherein The width of the flexible graphite strip is 150%-180% of the height of the sealing position.

5. The seal structure of claim 1, wherein The thickness of the flexible graphite strip is 0.5mm-4.5mm.

6. The seal structure of claim 5, wherein The thickness of the flexible graphite strip is 1.0mm-3.0mm.

7. The sealed structure of claim 1, wherein The sealing structure is arranged in the groove of the groove flange, and the overlapping joint gaps between the flexible graphite strips in adjacent layers of the sealing structure are staggered.

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