Sealing structure for flange connection

Abstract

The utility model relates to the field of flange connection, and discloses a sealing structure for flange connection, which comprises a flange A and a flange B. The outer wall of the flange A is provided with a mounting component and a sealing component, the outer wall of the flange A is fixedly connected with two groups of positioning blocks, and the inner wall of the flange B is provided with a positioning groove. The mounting assembly comprises a rotating ring, four groups of operating arms are fixedly connected to the outer wall of the rotating ring, a circle of rack is fixedly connected to the inner wall of the rotating ring, and a plurality of groups of bolts are slidably connected to the inner wall of the rotating ring. In the utility model, firstly, the positioning block at the flange A is aligned with the positioning groove of the flange B, and the flange A and the flange B are initially aligned by rotating, and at the moment, the rotating ring can be rotated by grasping the operating arm, so that the plurality of groups of bolts rotate on the inner wall of the rotating ring to penetrate through the internal threads of the flange A and the flange B; therefore, the two parts can be quickly spliced.

Description

Technical Field

[0001] The utility model relates to the field of flange connection, in particular to a sealing structure for flange connection. Background Art

[0002] Flange connection is a common mechanical connection method used to connect two pipes, valves, containers or other equipment parts together. This connection method consists of a flange (a flat ring-shaped part) and bolts, allowing the equipment to be connected safely and reliably and form a seal.

[0003] At the same time, when the flange connection is used for a long time, a certain gap may appear at the connection between the two, and it is necessary to add sealing rings and other structures to ensure the seal between the two.

[0004] However, most of the existing flanges are provided with bolt holes. When installing them, it is necessary to manually support the pipe at the flange to align it with another set of flange holes before the bolts can be rotated for installation. It is not possible to rotate and install multiple sets of bolts at the same time. Installing each set separately is likely to cause uneven force on the bolts on the left and right, which can easily cause the flange to tilt, thereby causing leakage at the connection, etc., and due to the limitations of flange manufacturing and processing, as well as the need for adjustment during the installation process, there is usually a certain gap between the flanges after the connection is completed, which cannot achieve a good sealing effect. For this reason, a sealing structure for flange connection is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a sealing structure for flange connection, aiming to improve the problem in the prior art that the installation of each group separately may easily lead to uneven force on the bolts on the left and right, which may easily lead to tilt of the flange and thus cause liquid leakage at the connection.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sealing structure for flange connection, comprising flange A and flange B, the outer wall of flange A is provided with a mounting assembly, the outer wall of flange A is provided with a sealing assembly, the outer wall of flange A is fixedly connected with two groups of positioning blocks, the inner wall of flange B is provided with a positioning groove, the mounting assembly comprises a rotating ring, the outer wall of the rotating ring is fixedly connected with four groups of operating arms, the inner wall of the rotating ring is fixedly connected with a circle of racks, and the inner wall of the rotating ring is slidably connected with multiple groups of bolts.

[0007] As a further description of the above technical solution:

[0008] The sealing assembly includes a connecting block, the outer wall of the connecting block is fixedly connected to an air intake pipe, the end of the air intake pipe away from the connecting block is fixedly connected to an inflatable cushion, the inner wall of the connecting block passes through and is rotatably connected to a blocking ball, the top of the outer wall of the connecting block is fixedly connected to a fixed block, and the inner wall of the fixed block is elastically connected to an insert block via a limit spring.

[0009] As a further description of the above technical solution:

[0010] The inner side wall of the rotating ring contacts the outer wall of the flange A, and a tooth block is provided at the top end of the bolt, and the tooth block portion of the bolt is meshed with the rack.

[0011] As a further description of the above technical solution:

[0012] The bolts penetrate through the inner wall of flange A and are threadedly connected thereto, and the bolts penetrate through the inner wall of flange B and are threadedly connected thereto.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the positioning block is slidably connected to the inner wall of the positioning groove.

[0015] As a further description of the above technical solution:

[0016] The left outer wall of the inflatable cushion contacts the outer wall of flange A, and the right outer wall of the inflatable cushion contacts the outer wall of flange B.

[0017] As a further description of the above technical solution:

[0018] One end of the limit spring is fixedly connected to the surface of the insert block, and the other end of the limit spring is fixedly connected to the inner side wall of the fixed block.

[0019] As a further description of the above technical solution:

[0020] The insert block penetrates and is slidably connected to the inner wall of the fixed block, the outer wall of the top of the blocking ball is provided with multiple groups of through holes, and the bottom end of the outer wall of the insert block is plugged into the inner wall of the through hole.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by providing a mounting assembly, when flange A and flange B are connected, the positioning block at flange A is first aligned with the positioning groove of flange B, and then rotated to allow flange A and flange B to be preliminarily aligned. At this time, the operating arm can be grasped to rotate the rotating ring so that multiple groups of bolts are rotated on the inner wall thereof to penetrate the internal threads of flange A and flange B, so as to quickly splice the two.

[0023] 2. In the utility model, by inflating the inflatable cushion, the gap between the two sets of flanges A and flange B can be closed after the two sets of flanges A and flange B are connected, and the inflatable cushion can be closed by rotating the blocking ball, so as to maintain the sealing effect of the connection between the two sets of flanges A and flange B and avoid leakage in the gap between the two sets. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a sealing structure for flange connection proposed by the utility model;

[0025] Figure 2 This is a schematic structural diagram of a flange A, a flange B and a sealing assembly in a separated state in a flange connection sealing structure proposed by the utility model;

[0026] Figure 3 This is a schematic structural diagram of a flange connection sealing structure proposed by the utility model, in which the bolts and the rotating ring are in a separated state;

[0027] Figure 4 A schematic diagram of a partial cross-sectional structure of a flange B of a sealing structure for flange connection proposed by the utility model;

[0028] Figure 5 The utility model discloses a partial cross-sectional structural schematic diagram of a connection block of a sealing structure for flange connection.

[0029] Legend:

[0030] 1. Flange A; 2. Flange B; 3. Mounting assembly; 31. Rotating ring; 32. Operating arm; 33. Rack; 34. Bolt; 4. Sealing assembly; 41. Connecting block; 42. Inlet pipe; 43. Inflatable cushion; 44. Fixing block; 45. Limiting spring; 46. Insert block; 47. Blocking ball; 5. Positioning block; 6. Positioning groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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 in 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.

[0032] Reference Figure 1-Figure 3The utility model provides an embodiment: a sealing structure for flange connection, including flange A1 and flange B2, flange A1 and flange B2 are both prior arts, and their surfaces are provided with thread grooves corresponding to bolts 34, and the bolts 34 are connected with the threads between the two, so as to splice and fix the two, the outer wall of flange A1 is provided with a mounting assembly 3, the outer wall of flange A1 is provided with a sealing assembly 4, and the outer wall of flange A1 is fixedly connected with two sets of positioning blocks 5.

[0033] Reference Figure 2-Figure 4 The outer wall of the positioning block 5 is slidably connected to the inner wall of the positioning groove 6. The shape of the positioning groove 6 corresponds to the positioning block 5, so that when the positioning block 5 enters the inner wall of the positioning groove 6, it can slide on the inner wall of the positioning groove 6, thereby quickly splicing the flange A1 and the flange B2, and aligning the threaded grooves of the two groups. The inner wall of the flange B2 is provided with a positioning groove 6.

[0034] Reference Figure 2-Figure 3 The mounting assembly 3 includes a rotating ring 31, the inner side wall of the rotating ring 31 contacts the outer wall of the flange A1, the inner ring of the rotating ring 31 fits with the pipe connected to the outer wall of the flange A1, so that when the bolt 34 moves in the thread, it will drive the rotating ring 31 to move synchronously with it, and the outer wall of the rotating ring 31 is fixedly connected with four groups of operating arms 32. By providing the operating arms 32, it is convenient to rotate and fix the rotating ring 31, and an anti-slip layer is provided on its surface. The inner wall of the rotating ring 31 is fixedly connected with a circle of racks 33, and the tooth spacing of the racks 33 is the same as that of the bolts 34. 4, and the rack 33 is welded and fixed inside the rotating ring 31. The inner wall of the rotating ring 31 is slidably connected with multiple groups of bolts 34. The top of the bolt 34 is provided with a tooth block. The tooth block part of the bolt 34 is meshed with the rack 33. The meshing between the two allows the multiple groups of bolts 34 to rotate synchronously on its inner wall through the rotation of the rotating ring 31, so as to penetrate the flange A1 and be threadedly connected with the flange B2 at the same time. The bolts 34 penetrate and are threadedly connected to the inner wall of the flange A1, and the bolts 34 penetrate and are threadedly connected to the inner wall of the flange B2.

[0035] Reference Figure 2 and Figure 5The sealing component 4 includes a connecting block 41, and an empty groove is opened on the outer side of the connecting block 41. Air is injected into the empty groove, so that the air can be transmitted to the inside of the inflatable cushion 43 through the air intake pipe 42. The outer wall of the connecting block 41 is fixedly connected to the air intake pipe 42, and the end of the air intake pipe 42 away from the connecting block 41 is fixedly connected to the inflatable cushion 43. The inflatable cushion 43 is a prior art, which can store air inside itself and produce deformation so that it can be firmly adsorbed between the flange A1 and the flange B2 to increase the sealing effect. The left outer wall of the inflatable cushion 43 contacts the outer wall of the flange A1, and the right outer wall of the inflatable cushion 43 contacts the outer wall of the flange B2. The inflatable cushion 43 is between the flange A1 and the flange B2, thereby increasing the sealing effect between the two.

[0036] Reference Figure 4 The inner wall of the connecting block 41 is penetrated and rotatably connected with a blocking ball 47, and a cavity is arranged at the bottom end of the blocking ball 47. When air needs to be injected into the inside of the inflatable cushion 43, the blocking ball 47 can be rotated to make the cavity communicate with the notch on the outside of the connecting block 41 and the air inlet pipe 42. The top of the outer wall of the connecting block 41 is fixedly connected with a fixing block 44, and the inner wall of the fixing block 44 is elastically connected with an insert block 46 through a limit spring 45. One end of the limit spring 45 is fixedly connected to the surface of the insert block 46, and the limit spring 45 is The other end is fixedly connected to the inner side wall of the fixed block 44. The function of the limit spring 45 is to automatically reset the position of the plug block 46 after it is pulled outward. The plug block 46 penetrates and is slidably connected to the inner wall of the fixed block 44. The outer wall of the top of the blocking ball 47 is provided with a plurality of through holes. The bottom end of the outer wall of the plug block 46 is plugged into the inner wall of the through hole. The plugging between the two fixes the blocking ball 47 at multiple positions of the inner wall of the connecting block 41, thereby closing or opening the connecting port between the connecting block 41 and the air intake pipe 42.

[0037] Working principle: First, flange A1 and flange B2 are spliced ​​together. At this time, the positioning block 5 on flange A1 enters the positioning groove 6 on the inner wall of flange B2, and rotating flange A1 will drive the positioning block 5 to move on the inner wall of the positioning groove 6 of flange B2, so that the threaded grooves of the two sets of flanges A1 and flange B2 can be quickly aligned.

[0038] Then, during the installation process, the rotating ring 31 can be rotated by operating the operating arm 32 on the outer wall of the rotating ring 31, and the rack 33 on the inner wall of the rotating ring 31 engages with the tooth block of the bolt 34. In this way, the rotation of the rotating ring 31 can drive multiple groups of bolts 34 to rotate synchronously on its inner wall, so that the bolts 34 simultaneously penetrate the flange A1 and are threadedly connected with the flange B2 to achieve fixed splicing of the two, so as to avoid the flanges being tilted due to different forces on the left and right when they are rotated and installed one by one.

[0039] At the same time, by injecting air into the empty groove on the outside of the connecting block 41, the air is transmitted to the inside of the inflatable cushion 43 through the air inlet pipe 42. The inflatable cushion 43 is deformed due to the air stored inside, and is firmly adsorbed between the flange A1 and the flange B2, thereby increasing the sealing effect. When air needs to be injected, the blocking ball 47 can be rotated to make the cavity at the bottom of the blocking ball 47 communicate with the notch on the outside of the connecting block 41 and the air inlet pipe 42, and the plug block 46 can be plugged into the through hole on the outer wall of the top of the blocking ball 47 under the action of the limit spring 45, so as to fix the blocking ball 47 at different rotation positions, thereby controlling the closing or opening of the communication port between the connecting block 41 and the air inlet pipe 42, so as to facilitate the sealing operation as needed.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 structure for flange connection, comprising a flange A (1) and a flange B (2), characterized in that: The outer wall of the flange A (1) is provided with a mounting assembly (3), the outer wall of the flange A (1) is provided with a sealing assembly (4), the outer wall of the flange A (1) is fixedly connected with two groups of positioning blocks (5), the inner wall of the flange B (2) is provided with a positioning groove (6), and the mounting assembly (3) includes a rotating ring (31); Four groups of operating arms (32) are fixedly connected to the outer wall of the rotating ring (31), a circle of racks (33) are fixedly connected to the inner wall of the rotating ring (31), and a plurality of groups of bolts (34) are slidably connected to the inner wall of the rotating ring (31).

2. A flange connection sealing structure according to claim 1, characterized in that: The sealing assembly (4) comprises a connecting block (41), the outer wall of the connecting block (41) is fixedly connected to an air intake pipe (42), one end of the air intake pipe (42) away from the connecting block (41) is fixedly connected to an inflatable cushion (43), the inner wall of the connecting block (41) is penetrated and rotatably connected to a blocking ball (47), the top end of the outer wall of the connecting block (41) is fixedly connected to a fixing block (44), and the inner wall of the fixing block (44) is elastically connected to an insert block (46) via a limit spring (45).

3. A flange connection sealing structure according to claim 1, characterized in that: The inner side wall of the rotating ring (31) contacts the outer wall of the flange A (1), and a tooth block is arranged at the top end of the bolt (34), and the tooth block part of the bolt (34) is meshed with the rack (33).

4. A flange connection sealing structure according to claim 1, characterized in that: The bolt (34) passes through and is threadedly connected to the inner wall of flange A (1), and the bolt (34) passes through and is threadedly connected to the inner wall of flange B (2).

5. A flange connection sealing structure according to claim 1, characterized in that: The outer wall of the positioning block (5) is slidably connected to the inner wall of the positioning groove (6).

6. A flange connection sealing structure according to claim 2, characterized in that: The left outer wall of the inflatable cushion (43) contacts the outer wall of the flange A (1), and the right outer wall of the inflatable cushion (43) contacts the outer wall of the flange B (2).

7. A flange connection sealing structure according to claim 2, characterized in that: One end of the limit spring (45) is fixedly connected to the surface of the insert block (46), and the other end of the limit spring (45) is fixedly connected to the inner side wall of the fixed block (44).

8. A flange connection sealing structure according to claim 2, characterized in that: The insert block (46) penetrates through and is slidably connected to the inner wall of the fixed block (44); the outer wall of the top of the blocking ball (47) is provided with a plurality of through holes; the bottom end of the outer wall of the insert block (46) is plugged into the inner wall of the through hole.

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