Anti-loosening flange

Abstract

The utility model discloses an anti-loosening flange, which relates to the technical field of pipeline connection and comprises two flange plates, each flange plate is divided into a sealing surface and a threaded cylinder, the two flange plates are connected through thread fit between the threaded cylinders, the sealing surfaces of the two flange plates are respectively provided with two convex rings, the two convex rings are positioned on the same circle center, and the two convex rings are arranged on the same circle center. A sealing ring is arranged between the two protruding rings, a gradient arc-shaped groove is formed in the sealing face of one flange plate, a through opening is formed in the sealing face of the other flange plate, a sealing plate is installed in the through opening, the through opening is connected with an ejector rod in a sliding mode, and a compression spring is fixedly connected between the ejector rod and the sealing plate. By means of one-way clamping matching of the gradient arc-shaped groove and the ejector rod, when the flange is unscrewed, the ejector rod is automatically clamped into the step at the deep end of the groove under the action of the compression spring, mechanical locking is formed, looseness prevention can be achieved without additional tools, the anti-looseness bolt can adapt to working conditions such as vibration and load fluctuation, and the problem that a traditional bolt is loosened is solved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to an anti-loosening flange. Background Technology

[0002] Flanges are disc-shaped parts commonly used in the connection of pipes and equipment. They are usually used in pairs and secured with bolts to connect and seal pipes to pipes or equipment. They are made of various materials, including carbon steel, stainless steel, and copper. Different types are suitable for different pressure, temperature, and media environments. They are widely used in industrial pipelines, chemical, petroleum, and construction industries, and are an important component for pipeline system connections.

[0003] Existing flange connection structures lack anti-loosening designs. When the liquid flow inside the pipeline is unstable, turbulence can easily generate noise and cause pipeline vibration. This vibration can gradually loosen the flange connection, affecting not only connection stability but also potentially compromising sealing performance and leading to safety hazards such as media leakage. This problem is particularly prominent in operating conditions with frequent fluid fluctuations, necessitating structural optimization to improve the reliability and sealing of flange connections. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing flanges lack anti-loosening structures and are prone to loosening due to pipeline vibration caused by fluid instability, and to propose an anti-loosening flange.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an anti-loosening flange, comprising two flanges, each flange consisting of a sealing surface and a threaded cylinder. The two flanges are connected by a threaded fit between the threaded cylinders. Two raised rings are provided on the sealing surfaces of both flanges, with the two raised rings located at the same center. A sealing ring is provided between the two raised rings. A gradient arc groove is provided on the sealing surface of one flange, and a through-hole is provided on the sealing surface of the other flange. A sealing plate is installed in the through-hole, and a push rod is slidably connected to the through-hole. A compression spring is fixedly connected between the push rod and the sealing plate.

[0006] Preferably, threaded holes are evenly spaced on the sealing surface of the flange, and the two flanges are installed and positioned through the threaded holes.

[0007] Preferably, the outer periphery of the sealing plate is provided with protrusions, and the end of the through opening is provided with an L-shaped groove, with the protrusions and the L-shaped groove engaging with each other.

[0008] Preferably, a limiting platform is provided at the end of the top rod, and a retaining ring is fixedly connected to the other end of the through-hole. The top rod is prevented from detaching by the cooperation of the limiting platform and the retaining ring.

[0009] Preferably, the outer surface of the sealing plate is provided with a handle, which controls the sealing plate to engage and fit within the through opening.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. In this utility model, the gradient arc groove and the top rod are used to lock in one direction. When the flange is loosened, the top rod is automatically locked into the deep end step of the groove under the action of the compression spring, forming a mechanical lock. It can prevent loosening without additional tools and can adapt to working conditions such as vibration and load fluctuation, avoiding the problem of loosening of traditional bolts.

[0012] 2. In this utility model, the top rod is prevented from detaching by the limiting platform and the retaining ring, and the sealing plate can be quickly disassembled to replace internal parts such as the compression spring by means of the snap-fit ​​design of the protrusion and the L-shaped groove, without the need to disassemble the entire flange, thus reducing maintenance costs and time costs. Attached Figure Description

[0013] Figure 1 This utility model provides a three-dimensional structural diagram of an anti-loosening flange. Figure 1 ;

[0014] Figure 2 This utility model provides a three-dimensional structural diagram of an anti-loosening flange. Figure 2 ;

[0015] Figure 3 This utility model provides a schematic diagram of the internal structure of the through groove in an anti-loosening flange;

[0016] Figure 4 This utility model provides a structural schematic diagram of the flange in an anti-loosening flange;

[0017] Figure 5 This utility model Figure 4 A magnified view of the local structure at point A in the middle.

[0018] Legend: 1. Flange; 2. Raised ring; 3. Gradient arc groove; 4. Through port; 5. Top rod; 6. Sealing ring; 7. Compression spring; 8. Sealing plate; 9. Raised block; 10. Handle; 11. Limiting platform; 12. Retaining ring; 13. L-shaped groove. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figure 1-5 As shown, this utility model provides an anti-loosening flange, including two flanges 1. Each flange 1 is divided into a sealing surface and a threaded cylinder. The two flanges 1 are connected by a threaded fit between the threaded cylinders. Each of the sealing surfaces of the two flanges 1 is provided with two raised rings 2, which are located at the same center. A sealing ring 6 is provided between the two raised rings 2. A gradient arc groove 3 is opened on the sealing surface of one flange 1, and a through-hole 4 is opened on the sealing surface of the other flange 1. A sealing plate 8 is installed in the through-hole 4. A push rod 5 is slidably connected to the through-hole 4, and a compression spring 7 is fixedly connected between the push rod 5 and the sealing plate 8.

[0022] The specific settings and functions of this embodiment will be explained in detail below. The anti-loosening design mainly relies on the cooperation between the gradient arc groove 3 and the push rod 5. The mechanism is that the gradient arc groove 3 is an arc groove that changes from shallow to deep, and the depth direction of the groove is opposite to the thread direction of the flange tight fit. Based on this characteristic, when the flange is tightened, the push rod 5 rotates along the gradient arc groove 3 towards the shallow side, and the groove opening of the gradient arc groove 3 will not limit the movement of the push rod 5. When the flange is loosened, a gap is formed between the end of the deep gradient arc groove 3 and the flange 1. The step at the opening, and the pressure of the compression spring 7 pushing outwards on the inside of the push rod 5, make the push rod 5 tightly stuck at the deep end of the gradient arc groove 3, preventing subsequent loosening and rotation, thus achieving the effect of preventing loosening. This method of preventing loosening can be used not only for the fit between two flanges 1, but also for the connection between a single flange 1 and a pipe. A groove shape similar to the gradient arc groove 3 is opened on the outer wall of the pipe, and the push rod 5 and its internal structure are installed on the flange 1 to achieve this. This technical solution takes the fit between two flanges 1 as an application example.

[0023] Example 2: Figure 3 , Figure 4 and Figure 5 As shown, threaded holes are evenly spaced on the sealing surface of flange 1, and the two flanges 1 are installed and positioned together through the threaded holes. A protrusion 9 is provided on the outer periphery of the sealing plate 8, and an L-shaped groove 13 is provided at the end of the through-hole 4. The protrusion 9 and the L-shaped groove 13 are engaged. A limiting platform 11 is provided at the end of the push rod 5, and a retaining ring 12 is fixedly connected to the other end of the through-hole 4. The push rod 5 is prevented from detaching by the engagement of the limiting platform 11 and the retaining ring 12. A handle 10 is provided on the outer surface of the sealing plate 8, which controls the engagement of the sealing plate 8 within the through-hole 4.

[0024] The overall effect of this embodiment is as follows: to prevent the top rod 5 from falling off the flange 1, a limiting platform 11 is set at the inner end of the top rod 5. The outer diameter of the limiting platform 11 is larger than the inner diameter of the retaining ring 12 set at the end of the through-hole 4. The difference in size creates a limiting and anti-detachment effect. In order to facilitate the replacement, maintenance and assembly of the flange 1 parts, the other end of the through-hole 4 is set as an open one. The top rod 5 and the compression spring 7 can be taken out from the other end of the through-hole 4. An L-shaped groove 13 is set at the end of the through-hole 4, and a protrusion 9 is set on the surface of the sealing plate 8. The protrusion 9 can pass through the short end of the L-shaped groove 13. After passing through, it can be rotated at a certain angle so that the protrusion 9 is located in the long end of the L-shaped groove 13. The protrusion 9 and the short end outlet of the L-shaped groove 13 are staggered, thereby forming a snap-fit ​​effect, so as to facilitate the subsequent replacement, maintenance and assembly of the flange 1 parts.

[0025] The operating principle and usage of this device are as follows: The anti-loosening flange achieves anti-loosening through the mechanical interlock between the gradient arc groove 3 and the push rod 5. When the two flanges 1 are tightened by the threaded cylinder, the push rod 5 slides along the shallow end of the gradient arc groove 3 under the action of the compression spring 7, without affecting the assembly; however, when the flange tends to loosen, the step at the deep end of the gradient arc groove 3 locks with the end of the push rod 5, and the compression spring 7 continuously provides outward pushing force to prevent the threads from rotating in the opposite direction. The push rod 5 is prevented from detaching by the limiting platform 11 and the retaining ring 12, and the sealing plate 8 is removable for maintenance by the engagement of the protrusion 9 and the L-shaped groove 13, forming an overall anti-loosening structure with one-way locking and two-way limiting.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An anti-loosening flange, comprising two flanges (1), each flange (1) having a sealing surface and a threaded sleeve, the two flanges (1) being connected by a threaded fit between the threaded sleeves, each flange (1) having two raised rings (2) on its sealing surface, the two raised rings (2) being located at the same center, and a sealing ring (6) being provided between the two raised rings (2), characterized in that: One of the flanges (1) has a gradient arc groove (3) on its sealing surface, and the other flange (1) has a through port (4) on its sealing surface. A sealing plate (8) is installed in the through port (4). A push rod (5) is slidably connected to the through port (4), and a compression spring (7) is fixedly connected between the push rod (5) and the sealing plate (8).

2. The anti-loosening flange according to claim 1, characterized in that: The sealing surface of the flange (1) is provided with threaded holes at equal intervals, and the two flanges (1) are installed and positioned through the threaded holes.

3. The anti-loosening flange according to claim 1, characterized in that: The outer periphery of the sealing plate (8) is provided with protrusions (9), and the end of the through opening (4) is provided with an L-shaped groove (13). The protrusions (9) and the L-shaped groove (13) are engaged with each other.

4. The anti-loosening flange according to claim 1, characterized in that: The end of the top rod (5) is provided with a limiting platform (11), and the other end of the through hole (4) is fixedly connected with a retaining ring (12). The top rod (5) is prevented from detaching by the cooperation of the limiting platform (11) and the retaining ring (12).

5. The anti-loosening flange according to claim 1, characterized in that: A handle (10) is provided on the outer surface of the sealing plate (8), and the sealing plate (8) is controlled to engage in the through opening (4) by the handle (10).

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