Jacket flange

Abstract

This utility model discloses a jacketed flange, comprising an integral flange (1), an inner sleeve (2), and an outer sleeve (3). The outer wall of the inner sleeve (2) is obliquely tapered (2.1), and the bottom of the annular groove between the inner sleeve (2) and the two side groove walls are both annular arc transition connection parts (4). This utility model discloses a jacketed flange that can be applied under high pressure and has the advantages of compact structure and low cost.

Description

Technical Field

[0001] This utility model relates to a flange assembly, and more particularly to a jacketed flange. Background Technology

[0002] A jacketed flange is a special type of pipe connector, consisting of a sleeve and a flange plate welded together. The sleeve is inserted into the flange plate, and the two are welded together using fillet welds. However, fillet welds have insufficient pressure resistance, limiting their application to low-pressure environments. To address this, Chinese patent CN 204062255U, "High-Pressure Connection Flange for Jacketed Pipes," discloses a jacketed flange manufactured using an integral forging process, where the sleeve and flange plate are forged as a single piece, thus enabling its application in high-pressure situations. However, the aforementioned integrally forged jacketed flange still has the following drawbacks: First, the outer wall of the inner sleeve lacks a slope, creating a weak point. During use in high-pressure environments, this can lead to excessive stress and insufficient strength, affecting the flange's safety. Second, the bottom of the outer wall of the inner sleeve and the bottom of the inner wall of the outer sleeve are connected to the flange at right angles without rounding. Therefore, under high pressure, stress concentration will occur, which will seriously affect its service life. Third, the beveled design of the outer wall of the outer sleeve results in no space for the adjacent nut to be installed. Even if a flange of the same specification is used, the nut cannot be tightened. Only by increasing the flange size can there be space for the nut to be installed, which makes the flange bulky and increases the manufacturing cost. Summary of the Invention

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a jacketed flange that can be applied under high pressure rings and has the advantages of compact structure and low cost.

[0004] The purpose of this utility model is achieved as follows:

[0005] A jacketed flange includes an integral flange, an inner sleeve, and an outer sleeve. The outer wall of the inner sleeve is tapered and angled downwards. The bottom of the annular groove between the inner sleeve and the outer sleeve and the two side walls of the groove are both arc-shaped transition connections.

[0006] Preferably, the slope of the conical surface of the inner sleeve is 10°.

[0007] Preferably, the outer sleeve is a straight cylinder structure, and the bottom of the outer cylinder wall of the straight cylinder structure is connected to the flange surface by a rounded transition.

[0008] Preferably, the mating surfaces of the flanges are provided with mating bosses or mating grooves, and the mating bosses or mating grooves are matched.

[0009] Preferably, the gasket is embedded in the mating groove.

[0010] Preferably, after the bolts are inserted into the bolt holes of the flange, nuts are tightened at both ends of the bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The jacketed flange of this utility model has the following advantages:

[0013] I. The outer wall of the inner sleeve of this utility model jacketed flange adopts a tapered surface with an inclined design to form a tapered neck structure. Calculations and tests show that a 10° inclination angle can meet most design requirements, satisfying stress requirements while possessing sufficient strength to ensure the flange's safety under high-pressure applications. Simultaneously, increasing the flange thickness and reducing the height of the inner and outer sleeves enhances overall strength without increasing weight, through a method similar to upsetting.

[0014] II. In this utility model of jacketed flange, the bottom of the outer wall of the inner sleeve and the bottom of the inner wall of the outer sleeve are rounded at the connection with the flange, thereby optimizing the stress transition method and preventing stress concentration during high-pressure use, thus ensuring its safety and service life.

[0015] Third, the outer wall of the jacketed flange of this utility model eliminates the slope design and adopts a straight pipe structure. Furthermore, through finite element calculation, while ensuring the strength of the outer sleeve, more space is provided outside the outer sleeve for nut installation. As a result, the jacketed flange of this utility model has a compact structure and provides space for nut installation. Attached Figure Description

[0016] Figure 1 and Figure 2 This is a schematic diagram of the structure of a jacketed flange according to the present invention.

[0017] Figure 3 This is a schematic diagram illustrating the application status of a jacketed flange, which is a utility model.

[0018] in:

[0019] 1. Flange; 2. Inner sleeve; 3. Outer sleeve; 4. Arc transition connection; 5. Gasket; 6. Bolt; 7. Nut;

[0020] Bolt hole 1.1, mating boss 1.2, mating groove 1.3;

[0021] Conical surface 2.1;

[0022] Outer cylinder wall 3.1. Detailed Implementation

[0023] See Figures 1-3The present invention relates to a jacketed flange, comprising an integrally cast flange 1, an inner sleeve 2 and an outer sleeve 3, wherein the flange hole of the flange 1, the inner sleeve 2 and the outer sleeve 3 are coaxially arranged, the outer sleeve 3 is fitted outside the inner sleeve 2, and the flange 1 has a plurality of bolt holes 1.1 evenly distributed on the flange 1.

[0024] The outer wall of the inner sleeve 2 is sloping downwards as a tapered surface 2.1, which enables the inner sleeve 2 to have higher compressive strength. Furthermore, calculations and experiments have shown that a 10° angle between the tapered surface 2.1 and the inner wall of the inner sleeve 2 provides the best economic benefits, achieving optimal compressive strength for the same or similar weight.

[0025] The bottom of the conical surface 2.1 of the inner sleeve 2 and the plate surface of the flange 1 are connected by an arc to form an arc transition connection part 4; at the same time, the bottom of the inner wall of the outer sleeve 3 and the plate surface of the flange 1 are also connected by an arc to form an arc transition connection part 4. That is, the bottom of the annular groove formed by the inner sleeve 2 and the outer sleeve 3 and the two side groove walls are both annular arc transition connection parts 4.

[0026] The outer sleeve 3 is a straight cylinder structure, and the bottom of the outer cylinder wall 3.1 of the straight cylinder structure is connected to the flange 1 by a rounded transition, thereby replacing the tapered tube structure in the comparative patent CN 204062255U. The adoption of the straight tube method greatly increases the installation space of the bolts 6.

[0027] See Figure 3 In use, this utility model jacketed flange can be used alone or connected together with a regular flange, as follows: Figure 3 The two sets of jacketed flanges shown are used together. At this time, on the mating surfaces of the flanges 1 of the two jacketed flanges, one flange 1 has a mating boss 1.2 and the other flange 1 has a mating groove 1.3. The mating boss 1.2 and the mating groove 1.3 match each other. When mating, the mating boss 1.2 is inserted into the mating groove 1.3, and the mating groove 1.3 is provided with a ring-shaped gasket 5. Then, the double-threaded bolt 6 is inserted into the bolt hole 1.1, and the nuts 7 are tightened at both ends of the bolt 6 to achieve quick mating.

[0028] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A jacketed flange comprising an integrally formed flange (1), an inner sleeve (2), and an outer sleeve (3), characterized in that: The outer wall of the inner sleeve (2) is set as a tapered surface (2.1) with the inner sleeve (2) and the outer sleeve (3) are connected by an arc-shaped transition part (4) between the bottom of the annular groove and the two side groove walls.

2. A jacketed flange according to claim 1, wherein: The slope of the conical surface (2.1) of the inner sleeve (2) is 10°.

3. The jacketed flange of claim 1, wherein: The outer sleeve (3) is a straight cylinder structure, and the bottom of the outer cylinder wall (3.1) of the straight cylinder structure is connected to the flange (1) by a circular arc transition.

4. The jacketed flange of claim 1, wherein: The mating surfaces of the flange (1) are provided with mating bosses (1.2) or mating grooves (1.3), and the mating bosses (1.2) or mating grooves (1.3) are matched.

5. A jacketed flange according to claim 4, wherein: The gasket (5) is embedded in the mating groove (1.3).

6. A jacketed flange according to claim 5, wherein: After the bolt (6) is inserted into the bolt hole (1.1) of the flange (1), tighten the nuts (7) at both ends of the bolt (6).

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