Flange joint

Abstract

The utility model relates to the technical field of flange joints, in particular to a flange joint which comprises a first flange plate and a second flange plate, and pipeline joints are connected to the opposite faces of the first flange plate and the second flange plate in a penetrating mode. A plurality of sets of evenly-distributed bolt holes are formed in the first flange plate and the second flange plate and surround the periphery of the pipeline connector, sealing rubber rings are attached to the positions, located on the pipeline connector, of the inner sides of the first flange plate and the second flange plate, and an elastic pressing ring is connected between the first flange plate and the second flange plate. According to the utility model, a group of elastic pressing rings are additionally arranged between the sealing rubber rings of the first flange plate and the second flange plate, so that after the first flange plate and the second flange plate are fastened through the assembly bolt, an abutting force opposite to the bolt can be formed on the first flange plate and the second flange plate under the elastic tension of the elastic pressing rings; therefore, the pre-tightening force of the assembly bolt is enhanced, looseness of the assembly bolt is avoided, and connectivity is improved.

Description

Technical Field

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

[0002] Flanges are parts that connect shafts to each other and are used to connect pipe ends. Flanges are also used on equipment inlets and outlets to connect two devices.

[0003] There are holes on the flange. The traditional flange connection is to add a sealing gasket between the two flange plates and then tighten them with bolts. The disadvantage of this structure is inaccurate positioning. If it is not accurately positioned, flange misalignment will lead to the risk of leakage.

[0004] Therefore, it is particularly important to design a flange joint to change the above technical defects and improve overall practicality. Utility Model Content

[0005] The purpose of the utility model is to provide a flange joint to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flange joint comprises a first flange plate and a second flange plate, wherein opposite sides of the first flange plate and the second flange plate are both connected with pipe joints, a plurality of groups of evenly distributed bolt holes are provided inside the first flange plate and the second flange plate and around the periphery of the pipe joint, a sealing rubber ring is attached to the inner side of the first flange plate and the second flange plate and located at the position of the pipe joint, an elastic pressure ring is connected between the first flange plate and the second flange plate, a plurality of groups of limiting ears distributed in a matrix are connected to the outer side of the first flange plate and the second flange plate, a limiting plug column is connected to the inner side of the limiting ear on the first flange plate, a hard rubber gasket is sleeved on the end of the limiting plug column away from the limiting ear, a limiting hole is provided inside the limiting ear on the second flange plate, a positioning slot used in conjunction with the hard rubber gasket is provided around the inner wall of the limiting hole, and a pressure spring is installed inside the limiting hole.

[0008] As a preferred solution of the utility model, two groups of bolt holes between the first flange and the second flange and at corresponding positions are fixedly connected by assembly bolts.

[0009] As a preferred solution of the utility model, the sealing rubber ring is bonded to the inner sides of the first flange and the second flange by waterproof sealant.

[0010] As a preferred solution of the utility model, both ends of the elastic pressure ring are in contact with the sealing rubber ring, and the elastic pressure ring is designed to be detachable from the first flange and the second flange respectively.

[0011] As a preferred solution of the utility model, the limiting plug post is connected to the limiting socket in a plug-in manner, and the external structure size of the limiting plug post is matched with the internal structure size of the limiting socket.

[0012] As a preferred solution of the utility model, the connection between the hard rubber gasket and the positioning slot is a slot connection.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, a flange joint is provided, and a group of elastic pressure rings are added between the sealing rubber rings of the first flange and the second flange. When the first flange and the second flange are fastened by assembly bolts, the elastic tension of the elastic pressure rings can form a contact force opposite to the bolts on the first flange and the second flange, thereby strengthening the pre-tightening force of the assembly bolts to avoid loosening of the assembly bolts and improving the connectivity.

[0015] 2. In the utility model, a flange joint is provided, and four sets of limit ears are added to the outer sides of the first flange and the second flange. When the first flange and the second flange are connected, the limit plug can be inserted into the limit plug hole at the corresponding position. After insertion, the hard rubber gasket is squeezed into the positioning groove with a certain force, thereby ensuring the accuracy of the connection between the first flange and the second flange, ensuring that no misalignment occurs, and under the reverse force of the pressure spring, the stability of the limit plug is improved, thereby ensuring that the connected flange will not leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the first flange and the second flange of the utility model in an assembled state;

[0017] Figure 2 This is a structural diagram of the first flange and the second flange of the utility model in a separated state;

[0018] Figure 3 This is the internal structure diagram of the limiting ear of the utility model.

[0019] In the figure: 1. first flange; 2. second flange; 3. pipe joint; 4. bolt hole; 5. sealing rubber ring; 6. elastic pressure ring; 7. limiting ear; 701. limiting plug column; 702. hard rubber gasket; 703. limiting plug hole; 704. positioning slot; 705. pressure spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0024] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0025] A flange joint, comprising a first flange 1 and a second flange 2, opposite sides of the first flange 1 and the second flange 2 are both connected with a pipe joint 3, a plurality of groups of bolt holes 4 evenly distributed are provided inside the first flange 1 and the second flange 2 and around the periphery of the pipe joint 3, a sealing rubber ring 5 is attached to the inner side of the first flange 1 and the second flange 2 and located at the position of the pipe joint 3 to ensure the sealing of the connection, an elastic pressure ring 6 is connected between the first flange 1 and the second flange 2, when the first flange 1 and the second flange 2 are fastened by assembly bolts, an abutment force opposite to the bolts can be formed on the first flange 1 and the second flange 2 under the elastic tension of the elastic pressure ring 6, thereby strengthening the pre-tightening force of the assembly bolts to prevent the assembly bolts from loosening, and a plurality of groups of limiting ears 7 distributed in a matrix are connected to the outer sides of the first flange 1 and the second flange 2;

[0026] Two groups of bolt holes 4 corresponding to each other between the first flange 1 and the second flange 2 are fixedly connected by assembly bolts, and the sealing rubber ring 5 is bonded to the inner sides of the first flange 1 and the second flange 2 by waterproof sealant. Both ends of the elastic pressure ring 6 are in contact with the sealing rubber ring 5, and the elastic pressure ring 6 is designed to be detachable from the first flange 1 and the second flange 2 respectively.

[0027] In this embodiment, please refer to Figure 2 and Figure 3 The inner side of the limiting ear 7 on the first flange 1 is connected to a limiting plug post 701, and a hard rubber gasket 702 is sleeved on the end of the limiting plug post 701 away from the limiting ear 7. A limiting plug hole 703 is provided inside the limiting ear 7 on the second flange 2. When the first flange 1 and the second flange 2 are connected, the limiting plug post 701 can be inserted into the limiting plug hole 703 at the corresponding position. A positioning slot 704 used in conjunction with the hard rubber gasket 702 is provided around the inner wall of the limiting plug hole 703. A pressure spring 705 is installed inside the limiting plug hole 703, thereby ensuring the accuracy of the connection between the first flange 1 and the second flange 2 and ensuring that no misalignment occurs.

[0028] The limiting pin 701 is connected to the limiting socket 703 by plugging and unplugging, the external structure size of the limiting pin 701 is adapted to the internal structure size of the limiting socket 703, and the connection method between the hard rubber gasket 702 and the positioning slot 704 is a slot connection.

[0029] The working process of the utility model is as follows: a group of elastic pressure rings 6 are added between the sealing rubber rings 5 ​​of the first flange 1 and the second flange 2. When the first flange 1 and the second flange 2 are fastened by the assembly bolts, the elastic tension of the elastic pressure ring 6 can form an abutting force opposite to the bolts on the first flange 1 and the second flange 2, thereby strengthening the pre-tightening force of the assembly bolts to prevent the assembly bolts from loosening, and improving the connectivity; in addition, four groups of limiting ears 7 are added to the outer sides of the first flange 1 and the second flange 2. When the first flange 1 and the second flange 2 are connected, the limiting plug 701 can be inserted into the limiting plug hole 703 at the corresponding position. After insertion, the hard rubber gasket 702 is squeezed into the positioning slot 704 with a certain force, thereby ensuring the accuracy of the connection between the first flange 1 and the second flange 2, ensuring that no misalignment occurs, and under the reverse force of the pressure spring 705, the stability of the limiting plug is improved, thereby ensuring that the flanges will not leak after connection.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange joint, comprising a first flange (1) and a second flange (2), characterized in that: The first flange (1) and the second flange (2) are connected to opposite sides thereof with pipe joints (3). The first flange (1) and the second flange (2) are provided with a plurality of evenly distributed bolt holes (4) inside and around the periphery of the pipe joint (3). A sealing rubber ring (5) is attached to the inner side of the first flange (1) and the second flange (2) and at the position of the pipe joint (3). An elastic pressure ring (6) is connected between the first flange (1) and the second flange (2). The outer sides of the first flange (1) and the second flange (2) are connected with A plurality of groups of limiting ears (7) are arranged in a matrix, the inner side of the limiting ears (7) on the first flange (1) is connected to a limiting plug post (701), one end of the limiting plug post (701) away from the limiting ears (7) is sleeved with a hard rubber gasket (702), the limiting ears (7) on the second flange (2) are provided with a limiting plug hole (703), the inner wall of the limiting plug hole (703) is provided with a positioning slot (704) used in conjunction with the hard rubber gasket (702), and a pressure spring (705) is installed inside the limiting plug hole (703).

2. A flange joint according to claim 1, characterized in that: The two groups of bolt holes (4) located correspondingly between the first flange (1) and the second flange (2) are fixedly connected by assembly bolts.

3. A flange joint according to claim 1, characterized in that: The sealing rubber ring (5) is bonded to the inner sides of the first flange (1) and the second flange (2) by means of a waterproof sealing adhesive.

4. A flange joint according to claim 1, characterized in that: Both ends of the elastic pressure ring (6) are in contact with the sealing rubber ring (5), and the elastic pressure ring (6) is designed to be detachable from the first flange (1) and the second flange (2).

5. A flange joint according to claim 1, characterized in that: The limiting plug post (701) is connected to the limiting socket (703) in a plug-in manner, and the external structure size of the limiting plug post (701) is adapted to the internal structure size of the limiting socket (703).

6. A flange joint according to claim 1, characterized in that: The connection between the hard rubber gasket (702) and the positioning slot (704) is a slot connection.

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