High-strength pressure-bearing flange

Abstract

The high-strength pressure-bearing flange comprises a flange plate body, balance holes are formed in the side edge of the flange plate body at equal intervals, and balance mechanisms are arranged in inner cavities of the balance holes. The balance mechanism comprises a sealing piston, a limiting rod and a balance spring, the sealing piston is installed in an inner cavity of the balance hole, one end of the limiting rod is fixedly connected with the side face of the sealing piston, and the outer ring of the limiting rod is sleeved with the balance spring. Through the design and use of a sealing plug, a sealing piston, a balance hole, a balance spring and a limiting plug, when a fluid material is conveyed by a pipeline, especially when the pressure intensity in the pipeline is increased, instantaneous pressure relief can be conducted on the pipeline and the interior of a flange plate, and the pipeline is protected; in this way, the upper limit of the pressure borne by the whole pipeline and the flange plate can be improved in cooperation with the use of the materials of the pipeline and the flange plate in the fluid material transportation process, and the safety of the pipeline and the flange plate in use is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a high-strength pressure-bearing flange. Background Art

[0002] Flange is a general term for a disk-shaped metal body with several holes cut around it for connection. Flange connections are easy to use and can withstand high pressure. Flange connections are widely used in industrial pipelines.

[0003] There are two main states when installing the flange. One is to install the flange at the pipe port, and the other is to dock the pipe with the flange.

[0004] When used in flanged pipes, their main function is to extend the length of the pipe and to connect two sections of pipes. The state of the fluid transported in the pipe is different in different environments. In a cold environment, the pressure of the fluid transported in the pipe on the pipe will be relatively small. In a high temperature environment, the fluid will expand, so the extrusion pressure on the pipe and the flange will increase. At the same time, the pressure on the pipe and the flange is also related to the flow rate of the fluid. When the instantaneous flow rate is large, the pressure on the pipe and the flange will increase when the fluid flows. When the flow rate is small, the extrusion pressure of the fluid on the inner wall of the pipe and the flange will decrease.

[0005] The state of the fluid transported in the pipeline is directly related to the safety of the pipeline itself and the safety of the flange at the pipeline joint. That is, the extrusion pressure on the pipeline and the flange increases, which will cause extrusion damage to the pipeline. At the same time, for the flange, although the overall structure of the flange is relatively good, if the pressure is unstable for a long time, it will cause the flange to vibrate, which will then cause the flange to be unstable and the sealing to change, which will directly affect the work of conveying fluid in the pipeline.

[0006] Therefore, we propose a high-strength pressure-bearing flange to solve the above problems. Utility Model Content

[0007] The purpose of the present invention is to provide a high-strength pressure-bearing flange to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A high-strength pressure-bearing flange comprises a flange body, wherein balancing holes are opened at equal distances on the side of the flange body, and a balancing mechanism is arranged in the inner cavity of the balancing hole.

[0010] The balancing mechanism includes a sealing piston, a limiting rod, a balancing spring and a limiting plug. The sealing piston is installed in the inner cavity of the balancing hole. One end of the limiting rod is fixedly connected to the side of the sealing piston. The balancing spring is mounted on the outer ring of the limiting rod. The limiting plug is installed at the end of the inner cavity of the balancing hole.

[0011] Preferably, the balancing hole is a convex hole, the end of the balancing hole close to the inner cavity of the flange body is a tapered hole, and the end of the sealing piston close to the inner cavity of the flange body is a tapered structure.

[0012] Preferably, a threaded structure is provided on the outer ring of the limit plug and the inner wall of the end of the inner cavity of the balancing hole, and the limit plug is threadedly connected to the balancing hole.

[0013] Preferably, a telescopic hole is installed through the side of the limiting plug, and one end of the limiting rod passes through the telescopic hole and extends to the outside of the flange body.

[0014] Preferably, the balance spring is initially in a compressed state, and both ends of the balance spring respectively abut against the end surfaces of the sealing piston and the limit plug.

[0015] Preferably, one end of the sealing piston close to the inner ring of the flange body is fixedly connected to a sealing plug, and mounting holes for installing fasteners are equidistantly provided on the top of the flange body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This high-strength pressure-bearing flange, through the design and use of sealing plugs, sealing pistons, balancing holes, balancing springs and limit plugs, can instantly relieve the pressure inside the pipeline and the flange when the pipeline is transporting fluid materials, especially when the pressure inside the pipeline becomes large. In this way, in the process of transporting fluid materials, combined with the use of the pipeline and the flange's own materials, the upper limit of the pressure that the entire pipeline and the flange can withstand can be increased, which greatly improves the safety of the pipeline and flange when in use.

[0018] 2. This high-strength pressure-bearing flange, through the design and use of sealing plugs, sealing pistons, balancing holes, balancing springs and limit plugs, when actually transporting fluid materials through pipelines, operation and maintenance personnel can not only understand the pipeline transportation status through flow meters and pressure detection equipment, but also can visually judge the internal pressure size based on the limit rod structure in each flange, so as to carry out management and maintenance in a timely manner to reduce production and transportation risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the flange of the utility model;

[0021] Figure 3 This is an exploded view of the flange structure of the utility model.

[0022] In the figure: 1. Flange body; 2. Balancing hole; 3. Sealing piston; 4. Sealing plug; 5. Limit rod; 6. Balancing spring; 7. Limit plug; 8. Mounting hole. DETAILED DESCRIPTION

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

[0024] The utility model provides a high-strength pressure-bearing flange technical solution:

[0025] Example:

[0026] like Figure 1 As shown, the high-strength pressure-bearing flange mainly includes a flange body 1, as shown in FIG. Figure 2 As shown, balancing holes 2 are milled at equal distances on the outer wall of the flange body 1, a sealing piston 3 is arranged in the inner cavity of the balancing hole 2, a limiting rod 5 is fixedly connected to one end face of the sealing piston 3, a balancing spring 6 is mounted on the outer ring of the limiting rod 5, and a limiting plug 7 is installed at the end of the inner cavity of the balancing hole 2 away from the sealing piston 3.

[0027] Among them, such as Figure 2 As shown, the overall state of the balancing hole 2 is a convex hole, and the end of the balancing hole 2 close to the inner wall of the flange body 1 is a tapered hole, and the shape of the end of the sealing piston 3 close to the inner ring of the flange body 1 is the same as the inner cavity shape of the balancing hole 2.

[0028] Among them, the outer wall of the limit plug 7 is provided with a threaded structure, and the inner wall of the end of the inner cavity of the balancing hole 2 away from the sealing piston 3 is also provided with a threaded structure, and the limit plug 7 and the balancing hole 2 are threadedly connected.

[0029] A telescopic hole is formed in the middle of the stopper 7 for the telescopic action of the stopper rod 5 , and the stopper rod 5 passes through the telescopic hole and extends to the outside of the flange body 1 .

[0030] The balance spring 6 is initially in a compressed state, and mounting holes 8 for mounting fasteners are provided at equal distances on the top of the flange body 1 .

[0031] Among them, the end of the sealing piston 3 close to the inner ring of the flange body 1 is fixedly connected to the sealing plug 4, and the end of the sealing plug 4 away from the sealing piston 3 is an arc surface, and the curvature is the same as the inner ring side wall of the flange body 1.

[0032] In this embodiment, when the flange of this technical solution is used for butt-jointing installation of pipelines, the two ends of the flange body 1 can be directly butt-jointed and installed at the port positions of the two sections of pipelines.

[0033] When conveying fluid materials, under normal circumstances, the extrusion force of the flat spring 6 firmly squeezes the entire sealing piston 3 at the end position of the inner cavity of the balancing hole 2, and at the same time the sealing plug 3 also blocks the balancing hole 2 to prevent fluid leakage.

[0034] When the lateral pressure of the fluid inside the pipeline increases, an extrusion pressure is generated on the inner wall of the pipeline and the flange body 1, and the extrusion pressure will be applied to each sealing plug 4. When the internal pressure is too large, that is, the extrusion pressure is greater than the initial force of the balance spring 6, the extrusion pressure generated by the fluid will push the sealing plug 4 and the sealing piston 3 to continuously move away from the inner ring of the flange body 1 and compress the balance spring. At this time, part of the fluid material in the pipeline will enter the inner cavity of the balance hole 2 to appropriately reduce the internal pressure. Of course, in the technical solution of this application, the pressure reduction requires the superposition effect of multiple flange structures in the transport pipeline to achieve a safe pressure, but one flange structure can only play a mitigating role.

[0035] When the pressure is balanced, the pressure inside the pipeline is reduced. In this way, in the process of transporting fluid materials, the use of the pipeline and flange materials themselves can increase the upper limit of the pressure that the entire pipeline and flange can withstand, which greatly improves the safety of the pipeline and flange when in use.

[0036] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength pressure-bearing flange, comprising a flange body (1), characterized in that: Balancing holes (2) are provided at equal distances on the side of the flange body (1), and a balancing mechanism is provided in the inner cavity of the balancing hole (2); The balancing mechanism comprises a sealing piston (3), a limiting rod (5), a balancing spring (6) and a limiting plug (7); the sealing piston (3) is installed in the inner cavity of the balancing hole (2); one end of the limiting rod (5) is fixedly connected to the side of the sealing piston (3); the balancing spring (6) is sleeved on the outer ring of the limiting rod (5); and the limiting plug (7) is installed at the end of the inner cavity of the balancing hole (2).

2. A high-strength pressure-bearing flange according to claim 1, characterized in that: The balancing hole (2) is a convex hole, the end of the balancing hole (2) close to the inner cavity of the flange body (1) is a tapered hole, and the end of the sealing piston (3) close to the inner cavity of the flange body (1) is a tapered structure.

3. The high-strength pressure-bearing flange according to claim 1, characterized in that: The outer ring of the stopper (7) and the inner wall of the end of the inner cavity of the balancing hole (2) are both provided with a threaded structure, and the stopper (7) and the balancing hole (2) are threadedly connected.

4. The high-strength pressure-bearing flange according to claim 1, characterized in that: A telescopic hole is installed through the side of the limiting plug (7), and one end of the limiting rod (5) passes through the telescopic hole and extends to the outside of the flange body (1).

5. The high-strength pressure-bearing flange according to claim 1, characterized in that: The balance spring (6) is initially in a compressed state, and both ends of the balance spring (6) respectively abut against the end surfaces of the sealing piston (3) and the limit plug (7).

6. The high-strength pressure-bearing flange according to claim 1, characterized in that: One end of the sealing piston (3) close to the inner ring of the flange body (1) is fixedly connected to a sealing plug, and mounting holes (8) for mounting fasteners are equidistantly provided on the top of the flange body (1).

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