Thin flange assembly

Abstract

The utility model relates to a thin flange assembly which comprises a first flange piece, a filtering piece and a second flange piece. The inner side of the end face of the first flange piece extends inwards to form an annular step part. A plurality of first connecting through holes are formed in the end face of the first flange piece in an annular array mode. The filter piece comprises a filter screen and a frame; the inner side of the end face of the second flange piece extends outwards to form an annular protrusion, and the annular protrusion is connected to the annular step part in an inserted mode. A plurality of second connecting through holes are formed in the end face of the second flange piece and correspond to the first connecting through holes in a one-to-one mode. Bolts are arranged on the first connecting through holes and penetrate through the first connecting through holes and the corresponding second connecting through holes, and nuts are connected to the ends of the bolts in a sleeving mode; the outer side ends of the first flange piece and the second flange piece extend outwards to be provided with connecting areas. The filtering piece is installed in the flange assembly, so that the filtering piece has a filtering function and is very convenient to install and detach.

Description

Technical Field

[0001] This utility model relates to the field of metal processing and manufacturing technology, and in particular to a thin flange assembly. Background Technology

[0002] Thin-section flanges are sealing fittings with a flexible, highly elastic structure, suitable for connecting various pipelines and equipment, especially effective under high-pressure, high-temperature, and high-vibration conditions. Thin-section flanges achieve sealing through pressure-composite sealing materials. Common specifications include DN15-2000mm, pressure ratings of PN0.1-32Mpa, and connection methods include flange connection, wafer connection, and clamp connection. Thin-section flanges mainly consist of two flanges and fastening bolts. Under high-pressure, high-temperature, and high-vibration conditions, thin-section flanges can leverage their high elasticity and the sealing performance of the pressure-composite sealing material to ensure the safe operation of pipelines and equipment.

[0003] In some special cases, it is necessary to filter the medium in the pipeline, and filter screens need to be installed on the flanges. However, the structure of existing thin flanges makes it difficult to install filter screens, which affects their applicability.

[0004] It is desirable to provide a thin flange assembly in order to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a thin flange assembly with a filter element installed inside the flange assembly, giving it a filtering function, and making installation and disassembly very convenient.

[0006] To achieve the above-mentioned utility model objectives, a thin flange assembly is provided, comprising a first flange, a filter element, and a second flange.

[0007] The inner side of the end face of the first flange extends inward to form an annular stepped portion for installing the filter element;

[0008] The end face of the first flange is provided with a plurality of first connecting through holes in a ring array;

[0009] The filter element includes a filter screen and a frame;

[0010] The frame is located at the outer edge of the filter screen;

[0011] The border is disposed within the annular stepped portion;

[0012] The inner side of the end face of the second flange extends outward to form an annular protrusion, which is adapted to the annular step portion and is inserted into the annular step portion.

[0013] The end face of the second flange is provided with a plurality of second connecting through holes, and the second connecting through holes correspond one-to-one with the first connecting through holes;

[0014] Each of the first connecting through holes is provided with a bolt, which passes through the first connecting through hole and the corresponding second connecting through hole respectively, and a nut is sleeved on the end of the bolt;

[0015] The outer ends of the first flange and the second flange are provided with a connection area extending outward.

[0016] Preferably, the bottom of the stepped portion of the first flange is provided with a plurality of positioning grooves evenly, and the frame is provided with a plurality of positioning protrusions, the positioning protrusions corresponding one-to-one with the positioning grooves, and the positioning protrusions are inserted into the corresponding positioning grooves.

[0017] Furthermore, the filter screen has a curved surface.

[0018] Preferably, the outer wall of the end of the connecting area has an annular bevel.

[0019] Preferably, two annular grooves are provided on the end face of both the first flange and the end face of the second flange, and the two annular grooves on the first flange correspond one-to-one with the annular grooves on the second flange and are compatible with each other.

[0020] Sealing rings are inserted into the two annular grooves on the first flange.

[0021] This utility model discloses a thin flange assembly, which has the following advantages compared with the prior art:

[0022] (1) An annular step is provided on the inner side of the end face of the first flange and an annular protrusion is provided on the inner side of the end face of the first flange to effectively install the filter element, so that it is installed inside the flange assembly, so that it has a filtering function, and the installation and disassembly are very convenient.

[0023] (2) The design is simple and easy to use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the first flange in this embodiment. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the first flange in this embodiment. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the filter element in this embodiment;

[0027] Figure 4 This is a schematic diagram of the structure of the first flange in this embodiment. Figure 3 ;

[0028] Figure 5 This is a schematic diagram of the structure in this embodiment where the filter element is installed after the first flange. Figure 1 ;

[0029] Figure 6 This is a schematic diagram of the structure in this embodiment where the filter element is installed after the first flange. Figure 1

[0030] Figure 7 This is a schematic diagram of the structure of the second flange in this embodiment;

[0031] Figure 8 This is a structural schematic diagram of a thin flange assembly according to this embodiment. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] A thin flange assembly includes a first flange 1, a filter element, and a second flange 2.

[0034] like Figure 1 As shown, the inner side of the end face of the first flange 1 extends inward to form an annular stepped portion 3 for installing a filter element; a plurality of first connecting through holes 4 are provided on the end face of the first flange 1 in an annular array.

[0035] like Figure 5 As shown, the filter element includes a filter screen 5 and a frame 6, with the frame 6 located at the outer edge of the filter screen 5; the frame 6 is disposed within the annular stepped portion 3.

[0036] In this embodiment, as Figure 2 As shown, the bottom of the stepped portion of the first flange 1 is uniformly provided with a plurality of positioning grooves 7, and the frame 6 is provided with a plurality of positioning protrusions 8. The positioning protrusions 8 correspond one-to-one with the positioning grooves 7. The positioning protrusions 8 are inserted into the corresponding positioning grooves 7 to achieve positioning and prevent the filter element from sliding in the annular stepped portion 3.

[0037] Furthermore, in this embodiment, as Figure 3 As shown, the filter screen 5 has a curved surface, which effectively increases the filtration area.

[0038] like Figure 7 As shown, the inner side of the end face of the second flange 2 extends outward to form an annular protrusion 9, which is adapted to the annular step portion 3. The annular protrusion 9 is inserted into the annular step portion 3 to fix the filter element. The end face of the second flange 2 is provided with a plurality of second connecting through holes 10, which correspond one-to-one with the first connecting through holes 4.

[0039] Each of the first connecting through holes 4 is provided with a bolt 11, which passes through the first connecting through hole 4 and the corresponding second connecting through hole 10, and the end of the bolt 11 is fitted with a nut 12.

[0040] like Figure 4 As shown, the outer ends of the first flange 1 and the second flange 2 extend outward to form a connection area 13 for welding with external pipes. Further, in this embodiment, the outer wall of the end of the connection area 13 has an annular bevel 14 to facilitate welding with external pipes.

[0041] In this embodiment, as Figure 6 As shown, two annular grooves 15 are provided on the end face of the first flange 1 and the end face of the second flange 2. The two annular grooves 15 on the first flange 1 correspond one-to-one with the annular grooves 15 on the second flange 2 and are compatible. Sealing rings (not shown in the figure) are inserted into the two annular grooves 15 on the first flange 1. With this arrangement, the two sealing rings achieve a double sealing effect.

[0042] like Figure 8 As shown, when installing the above-mentioned thin flange assembly, the first flange 1 and the second flange 2 are first welded to the pipe to be connected. The filter element is installed on the annular step 3 of the first flange 1. Then, sealing rings are inserted into the two annular grooves 15. The first flange 1 and the second flange 2 are connected by bolts 11 and fixed by nuts 12. The flange assembly has a filter element inside, which can filter the medium in the pipe and is convenient for installation and disassembly.

[0043] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A thin flange assembly, characterized in that, Includes a first flange, a filter element, and a second flange; The inner side of the end face of the first flange extends inward to form an annular stepped portion for installing the filter element; The end face of the first flange is provided with a plurality of first connecting through holes in a ring array; The filter element includes a filter screen and a frame; The frame is located at the outer edge of the filter screen; The border is disposed within the annular stepped portion; The inner side of the end face of the second flange extends outward to form an annular protrusion, which is adapted to the annular step portion and is inserted into the annular step portion. The end face of the second flange is provided with a plurality of second connecting through holes, and the second connecting through holes correspond one-to-one with the first connecting through holes; Each of the first connecting through holes is provided with a bolt, which passes through the first connecting through hole and the corresponding second connecting through hole respectively, and a nut is sleeved on the end of the bolt; The outer ends of the first flange and the second flange are provided with a connection area extending outward.

2. A thin flange assembly according to claim 1, characterized in that, The bottom of the stepped portion of the first flange is provided with several positioning grooves evenly, and the frame is provided with several positioning protrusions. The positioning protrusions correspond one-to-one with the positioning grooves, and the positioning protrusions are inserted into the corresponding positioning grooves.

3. A thin flange assembly according to claim 2, characterized in that, The filter screen has a curved shape.

4. A thin flange assembly according to claim 1, characterized in that, The outer wall of the end of the connecting area has an annular bevel.

5. A thin flange assembly according to any one of claims 1 to 4, characterized in that, The end face of the first flange and the end face of the second flange are provided with two annular grooves. The two annular grooves on the first flange correspond one-to-one with the annular grooves on the second flange and are compatible with each other. Sealing rings are inserted into the two annular grooves on the first flange.

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