Sealing type flange

Abstract

The utility model relates to the technical field of flanges, and provides a sealing type flange which comprises a first flange plate and a second flange plate, the first flange plate and the second flange plate are fixedly connected through a plurality of connecting bolts, one side of the first flange plate is fixedly connected with an outer threaded sleeve, one side of the second flange plate is provided with a positioning groove, and the inner wall of the positioning groove is provided with a threaded groove. The thread portion of the external thread sleeve is in threaded fit with the thread groove, a sealing sleeve is concentrically arranged on the inner side of the external thread sleeve, one end of the sealing sleeve is fixedly connected with the first flange plate, and a clamping sleeve in sliding fit with the sealing sleeve is fixedly connected to the inner side of the positioning groove. The outer threaded sleeve is in threaded fit with the threaded groove, so that the sealing sleeve is matched with the clamping sleeve, the first flange plate and the second flange plate are tightly connected, the sealing performance between the first flange plate and the second flange plate is improved, and the situation that the sealing performance between the sealing sleeve and the clamping sleeve is reduced due to the fact that the whole structure is affected by loosening of a connecting bolt is avoided; the stability of the sealing performance of the first flange plate and the second flange plate is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, and in particular to a sealing flange. Background Art

[0002] Flange is an important component that connects pipes to each other or shafts to each other. Usually, a pair of flanges are provided with preset holes on their surfaces, and are connected to each other through bolts, nuts and other connectors. In actual operation, the flanges are not easy to fit tightly after the pipes are connected, which can easily cause the liquid or gas flowing in the pipes to leak and overflow.

[0003] In this regard, Chinese patent publication number CN220623111U discloses "a sealed flange, including half ring one and half ring two, and also including: two groups of sealing gaskets, respectively connected to the half ring one and half ring two; multiple groups of clamping blocks, all arranged on the half ring one; multiple groups of clamping grooves, all arranged on the half ring two, and the positions of the clamping grooves and the clamping blocks match; multiple groups of side placement holes, which are annularly arranged on the half ring one and half ring two, respectively, and the side placement holes are threadedly connected with locking bolts."

[0004] The above patent realizes the alignment of the connecting hole by cooperating between the protrusion and the slot, and then fixes the half ring one and the half ring two by bolts. The sealing of this connection method mainly depends on the tightness of the bolts. In actual use, once the bolts become loose, the sealing of the flange will be reduced, which makes the sealing of the flange unstable. In view of this, the utility model proposes a sealing flange. Utility Model Content

[0005] The utility model provides a sealing flange, which solves the problem of unstable sealing performance of the flange in the prior art.

[0006] The technical solution of the utility model is as follows: a sealing flange, comprising a flange plate one and a flange plate two, wherein the flange plate one and the flange plate two are fixedly connected by a plurality of connecting bolts, an external threaded sleeve is fixedly connected to one side of the flange plate one, a positioning groove is provided on one side of the flange plate two, a threaded groove is provided on the inner wall of the positioning groove, the threaded portion of the external threaded sleeve is threadably matched with the threaded groove, a sealing sleeve is concentrically arranged on the inner side of the external threaded sleeve, one end of the sealing sleeve is fixedly connected to the flange plate one, and a clamping sleeve that slides with the sealing sleeve is fixedly connected to the inner side of the positioning groove.

[0007] Preferably, the outer edges of the flange plate 1 and the flange plate 2 are each provided with a plurality of mounting holes that are slidably matched with the connecting bolts, and the plurality of mounting holes are distributed at equal angles around the corresponding flange plate 1 and the flange plate 2.

[0008] Preferably, the opening diameter of the positioning groove is the same as the outer diameter of the external threaded sleeve, and the outer diameter of the sealing sleeve is the same as the inner diameter of the ferrule.

[0009] Preferably, the inner side of the external threaded sleeve is fixedly connected with an arc-surface convex ring, and the outer side of the ferrule is provided with a plurality of compression seals for compressing the sealing sleeve by contacting with the arc-surface convex ring, and the plurality of compression seals are distributed at equal angles around the ferrule.

[0010] Preferably, the compression seal includes a sliding rod, which passes through the side wall of the ferrule and is slidably connected to the side wall of the ferrule. One end of the sliding rod is fixedly connected to a sealing strip, and the other end of the sliding rod is fixedly connected to an arc-surface top block. The arc-surface top block can contact the arc-surface convex ring when the threaded portion of the external threaded sleeve is engaged with the thread of the thread groove.

[0011] Preferably, the compression seal also includes a spring sleeved on the slide rod, one end of the spring abuts against the arc-surface top block, and the other end of the spring abuts against the outer wall of the ferrule.

[0012] Preferably, the sealing strip is an arc-shaped structure, and a rubber pad is fixedly connected to the inner side of the sealing strip.

[0013] Preferably, the opening ends of flange 1 and flange 2 are both welded with pipes, and the diameters of the two pipes are the same.

[0014] The working principle and beneficial effects of the utility model are:

[0015] 1. By matching the external thread sleeve of flange one with the thread groove of flange two, the internal connection between flange one and flange two is completed. At the same time, the sealing sleeve and the ferrule can make the pipe openings of flange one and flange two tightly connected, thereby greatly improving the sealing between flange one and flange two. Then, the outer edges of flange one and flange two are fixed by multiple connecting bolts. The overall structure will not be affected by the loosening of the connecting bolts, which will cause the sealing between the sealing sleeve and the ferrule to decrease, thereby ensuring the stability of the sealing between flange one and flange two.

[0016] 2. The threaded part of the external threaded sleeve cooperates with the thread of the thread groove, so that the arc surface top block contacts the arc surface convex ring. At this time, the arc surface top block is squeezed by the arc surface convex ring and moves, which makes the spring compressed and accumulates potential energy, so that all the sliding rods drive the corresponding arc surface top blocks to move centripetally, so that all the arc surface top blocks press the sealing sleeve, which can further improve the stability of the sealing sleeve and the ferrule and effectively avoid the problem of separation of the ferrule and the sealing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 A schematic diagram of the structure of a sealing flange of the utility model Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of a sealing flange of the utility model Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the structure of the flange 2 of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the compression seal of the utility model.

[0022] In the figure: 1. Flange one; 2. Flange two; 21. Positioning groove; 22. Threaded groove; 23. Clamping sleeve; 24. Compression seal; 241. Sliding rod; 242. Sealing strip; 243. Arc top block; 244. Spring; 3. Connecting bolt; 4. Pipe; 5. Mounting hole; 6. External threaded sleeve; 61. Arc convex ring; 7. Sealing sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1~Figure 4 As shown, this embodiment proposes a sealing flange, including a flange plate 1 and a flange plate 2, wherein the flange plate 1 and the flange plate 2 are fixedly connected by a plurality of connecting bolts 3, and the outer edges of the flange plate 1 and the flange plate 2 are provided with a plurality of mounting holes 5 that are slidably matched with the connecting bolts 3, and the plurality of mounting holes 5 are distributed at equal angles around the corresponding flange plate 1 and the flange plate 2, and the opening ends of the flange plate 1 and the flange plate 2 are welded with pipes 4, and the diameters of the two pipes 4 are the same; one side of the flange plate 1 is fixed It is connected with an external threaded sleeve 6, a positioning groove 21 is provided on one side of the flange 2, a threaded groove 22 is provided on the inner wall of the positioning groove 21, the threaded portion of the external threaded sleeve 6 is threadedly matched with the threaded groove 22, a sealing sleeve 7 is concentrically arranged on the inner side of the external threaded sleeve 6, one end of the sealing sleeve 7 is fixedly connected to the flange 1, a clamping sleeve 23 that slides with the sealing sleeve 7 is fixedly connected to the inner side of the positioning groove 21, the opening diameter of the positioning groove 21 is the same as the outer diameter of the external threaded sleeve 6, and the outer diameter of the sealing sleeve 7 is the same as the inner diameter of the clamping sleeve 23.

[0025] By threading the external threaded sleeve 6 of flange 1 with the threaded groove 22 of flange 2, the internal connection between flange 1 and flange 2 is completed. At the same time, the sealing sleeve 7 and the clamping sleeve 23 cooperate to make the pipe openings of flange 1 and flange 2 tightly connected, thereby greatly improving the sealing between flange 1 and flange 2. The outer edges of flange 1 and flange 2 are fixed by multiple connecting bolts 3. The overall structure will not be affected by the loosening of the connecting bolts 3, which will cause the sealing between the sealing sleeve 7 and the clamping sleeve 23 to decrease, thereby ensuring the stability of the sealing between flange 1 and flange 2.

[0026] Furthermore, a curved convex ring 61 is fixedly connected to the inner side of the external threaded sleeve 6, and a plurality of compression seals 24 are arranged on the outer side of the ferrule 23 to compress the sealing sleeve 7 by contacting with the curved convex ring 61. The plurality of compression seals 24 are distributed at equal angles around the ferrule 23.

[0027] Furthermore, the compression seal 24 includes a slide rod 241, which passes through the side wall of the sleeve 23 and is slidably connected to the side wall of the sleeve 23. One end of the slide rod 241 is fixedly connected to a sealing strip 242, and the sealing strip 242 is an arc-shaped structure. A rubber pad is fixedly connected to the inner side of the sealing strip 242. The other end of the slide rod 241 is fixedly connected to an arc-surface top block 243. The arc-surface top block 243 can contact the arc-surface convex ring 61 when the threaded portion of the external threaded sleeve 6 is threadedly matched with the thread groove 22. A spring 244 is sleeved on the slide rod 241, and one end of the spring 244 contacts the arc-surface top block 243, and the other end of the spring 244 contacts the outer wall of the sleeve 23.

[0028] When the threaded portion of the external threaded sleeve 6 is threadably matched with the thread groove 22, the arc surface top block 243 contacts the arc surface convex ring 61. At this time, the arc surface top block 243 is squeezed by the arc surface convex ring 61 and moves, which makes the spring 244 compressed and accumulates potential energy, so that all the sliding rods 241 drive the corresponding arc surface top blocks 243 to move centripetally, so that all the arc surface top blocks 243 press the sealing sleeve 7, which can further improve the stability of the sealing sleeve 7 and the clamping sleeve 23 and effectively avoid the problem of the clamping sleeve 23 and the sealing sleeve 7 being separated.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing flange, comprising a flange plate 1 (1) and a flange plate 2 (2), wherein the flange plate 1 (1) and the flange plate 2 (2) are fixedly connected by a plurality of connecting bolts (3), characterized in that: An external threaded sleeve (6) is fixedly connected to one side of the flange plate 1 (1), a positioning groove (21) is provided on one side of the flange plate 2 (2), a threaded groove (22) is provided on the inner wall of the positioning groove (21), a threaded portion of the external threaded sleeve (6) is threadedly engaged with the threaded groove (22), a sealing sleeve (7) is concentrically arranged on the inner side of the external threaded sleeve (6), one end of the sealing sleeve (7) is fixedly connected to the flange plate 1 (1), and a clamping sleeve (23) which is slidably engaged with the sealing sleeve (7) is fixedly connected to the inner side of the positioning groove (21).

2. A sealing flange according to claim 1, characterized in that: The outer edges of the flange plate 1 (1) and the flange plate 2 (2) are each provided with a plurality of mounting holes (5) for slidingly engaging with the connecting bolts (3), and the plurality of mounting holes (5) are distributed at equal angles around the corresponding flange plate 1 (1) and the flange plate 2 (2).

3. A sealing flange according to claim 1, characterized in that: The opening diameter of the positioning groove (21) is the same as the outer diameter of the external threaded sleeve (6), and the outer diameter of the sealing sleeve (7) is the same as the inner diameter of the ferrule (23).

4. A sealing flange according to claim 3, characterized in that: The inner side of the external threaded sleeve (6) is fixedly connected to a curved convex ring (61), and the outer side of the clamping sleeve (23) is provided with a plurality of compression seals (24) for compressing the sealing sleeve (7) by contacting the curved convex ring (61), and the plurality of compression seals (24) are distributed at equal angles around the clamping sleeve (23).

5. A sealing flange according to claim 4, characterized in that: The compression seal (24) includes a slide rod (241), the slide rod (241) passes through the side wall of the ferrule (23), and the slide rod (241) is slidably connected to the side wall of the ferrule (23), one end of the slide rod (241) is fixedly connected to a sealing strip (242), and the other end of the slide rod (241) is fixedly connected to a curved top block (243), and the curved top block (243) can abut against the curved convex ring (61) when the threaded portion of the external threaded sleeve (6) is threadedly engaged with the thread groove (22).

6. A sealing flange according to claim 5, characterized in that: The compression seal (24) further comprises a spring (244) sleeved on the slide rod (241), one end of the spring (244) abuts against the arc surface top block (243), and the other end of the spring (244) abuts against the outer wall of the ferrule (23).

7. A sealing flange according to claim 5, characterized in that: The sealing strip (242) is an arc-shaped structure, and a rubber pad is fixedly connected to the inner side of the sealing strip (242).

8. The sealing flange according to claim 1, characterized in that: Pipes (4) are welded to the open ends of the first flange (1) and the second flange (2), and the diameters of the two pipes (4) are the same.

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