A multi-position inner flange forging of refined austenite

Abstract

The utility model discloses a kind of multi-positioning inner flange plate forgings of refinement austenite, comprising: flange plate body, flange plate body is set with the center through cavity that penetrates along its thickness direction, and multiple fixing holes are uniformly and separately arranged in the outer side of center through cavity;Inner tube, one end of inner tube is fixedly connected to the surface of one side of flange plate body, and coaxially arranged with flange plate body, first outer step and second outer step are protruded on the outer wall of inner tube, second outer step is located between first outer step and flange plate body, and multiple positioning lugs are protruded on the step surface of second outer step in circumferential interval;Sleeve, one end of sleeve is fixedly connected to the surface of other side of flange plate body, and coaxially arranged with flange plate body.The beneficial effects of the utility model are as follows: the multi-angle positioning design of the technical scheme is adapted to different installation scenes, and manual docking time is shortened to 1 / 3 of traditional flange;Multiple positioning lugs and groove are cooperatively embedded, and positioning error is controlled within ±0.1mm.

Description

Technical Field

[0001] This utility model relates to the field of flange forging technology, and in particular to a multi-positioning internal flange forging with refined austenite. Background Technology

[0002] As a core component connecting pipelines and equipment, the flange's positioning accuracy, sealing performance, and structural strength directly affect the system's safety and reliability. With the development of industrial equipment towards higher pressure and greater integration, existing internal flange forgings are gradually revealing technical deficiencies:

[0003] In terms of positioning, traditional structures often use 1-2 sets of positioning pins or bolt holes for alignment. The number of positioning points is small, and relative rotation is likely to occur when subjected to torque. Furthermore, installation requires precise alignment at a single angle, which can lead to "misalignment and jamming" problems, resulting in low docking efficiency.

[0004] In terms of sealing structure, conventional sealing rings are only fixed by flat bonding without circumferential limiting, and are prone to displacement and detachment due to long-term vibration; moreover, most of them have a circular cross-section that contacts the sealing groove line, which can easily generate gaps under high pressure or temperature fluctuations, resulting in a high risk of leakage.

[0005] Structural strength and lightweight are difficult to balance: existing solid reinforcing ribs account for 30%-40% of the weight, resulting in low material utilization. Furthermore, stress concentration around the fixing holes can easily lead to fatigue cracks, failing to meet the requirements for lightweight load-bearing capacity.

[0006] In terms of material properties, the austenite grains are coarse (average size > 50 μm) under traditional forging processes, resulting in tensile strength < 600 MPa and low-temperature impact energy < 40 J, which limits its application in high-end equipment.

[0007] To address the aforementioned issues, this utility model aims to develop a multi-positioning internal flange forging with refined austenitic material. By optimizing the positioning structure, sealing design, reinforcing rib layout, and material grain refinement process, it meets the application requirements of high-pressure sealing, rapid installation, lightweighting, and high-performance materials. Utility Model Content

[0008] The main technical problem solved by this utility model is to provide a multi-positioning inner flange forging with refined austenite, thereby solving one or more of the above-mentioned prior art problems.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a multi-positioning inner flange forging with refined austenite, the innovation of which is: comprising:

[0010] The flange body has a central cavity extending along its thickness direction, and a plurality of fixing holes are evenly spaced around the outer side of the central cavity.

[0011] The inner tube has one end fixedly connected to one side surface of the flange body and is coaxially arranged with the flange body. The outer wall of the inner tube is provided with a first outer step and a second outer step. The second outer step is located between the first outer step and the flange body. The second outer step is provided with a plurality of positioning protrusions circumferentially spaced on the step surface of the second outer step.

[0012] A sleeve, one end of which is fixedly connected to the other side surface of the flange body and arranged coaxially with the flange body. A first inner step and a second inner step are protruding on the inner wall of the sleeve. The second inner step is located on the side of the first inner step away from the flange body. Multiple sets of positioning grooves matching the positioning protrusion are opened on the step surface of the second inner step.

[0013] An annular groove is provided on the surface of the first outer step, and a sealing ring is fitted into the annular groove.

[0014] In some embodiments, the number of positioning protrusions on the step surface of the second outer step is 3 to 4, and they are evenly spaced along the circumference.

[0015] In some embodiments, on the surface of the second inner step, the multiple sets of positioning grooves are distributed at 0°, 90° and 180° angles along the circumference, and the number of positioning grooves in each set is the same as the number of positioning protrusions.

[0016] In some embodiments, the depth of the annular groove is 0.5 to 1 mm, and the width of the annular groove is adapted to the cross-sectional width of the sealing ring.

[0017] In some embodiments, the sealing ring has an "I" shaped cross-section, including a planar base that fits against the bottom surface of the annular groove, and an arc-shaped sealing portion that protrudes away from the first outer step.

[0018] In some embodiments, the positioning bump is a hemispherical protrusion structure, and the positioning groove is a hemispherical groove structure that matches the hemispherical protrusion structure.

[0019] The beneficial effects of this utility model are:

[0020] Installation efficiency: The multi-angle positioning design adapts to different installation scenarios, and the manual connection time is reduced to 1 / 3 of that of traditional flanges;

[0021] Positioning accuracy: The coordinated engagement of multiple sets of positioning protrusions and slots controls the positioning error to within ±0.1mm;

[0022] Sealing reliability: The combination of the "I" shaped sealing ring and the arc-shaped sealing groove can withstand long-term sealing in a temperature range of -40℃ to 120℃ and a pressure of 1.6MPa.

[0023] Lightweight structure: The variable cross-section of the reinforcing ribs and the weight-reducing cavity design achieve weight reduction while improving strength, thus reducing transportation and installation costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0025] Figure 1 This is a front axial view structural diagram of a multi-positioning inner flange forging with refined austenite according to this utility model.

[0026] Figure 2 This is a rear-view axial view structural diagram of a multi-positioning inner flange forging with refined austenite according to this utility model.

[0027] Figure 3 This is a cross-sectional structural diagram of a multi-positioning inner flange forging with refined austenite according to this utility model. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figures 1 to 3 As shown, the embodiment of this utility model includes: a specific implementation of a multi-positioning inner flange forging with refined austenite is as follows:

[0030] (a) Flange body 100

[0031] The flange body 100 has an overall disc-shaped structure with a central cavity extending along its thickness at its center. This cavity is used for the passage of fluid or connecting parts. On the outside of the central cavity, a plurality of fixing holes 101 are evenly distributed around the circumference of the flange body 100. The number of fixing holes 101 is preferably 6, and the hole diameter is adapted to the standard bolt specifications, which are used to fix two flange bodies 100 together by bolts. Both sides of the flange body 100 are integrally formed with radially distributed reinforcing ribs. The reinforcing ribs and fixing holes 101 are arranged alternately around the circumference, that is, a fixing hole 101 is set between two adjacent reinforcing ribs, and the distance from the fixing hole 101 to the two side reinforcing ribs is equal to ensure uniform stress on the structure.

[0032] (II) Inner tube 200

[0033] The inner tube 200 is a hollow tubular structure, with one end vertically fixed to one side surface of the flange body 100 and coaxially arranged with the flange body 100 (i.e., the central axis of the inner tube 200 coincides with the central axis of the flange body 100). Two outwardly protruding stepped structures are integrally formed on the outer wall of the inner tube 200, namely the first outer step 201 and the second outer step 202. The second outer step 202 is located between the first outer step 201 and the flange body 100, and the outer diameter of the second outer step 202 is larger than the outer diameter of the first outer step 201. On the stepped surface of the second outer step 202 (the side surface facing the first outer step 201), 3-4 positioning protrusions 203 are evenly spaced along the circumference. The positioning protrusions 203 are hemispherical protrusions, preferably with a radius of 2-3 mm and a protrusion height of 1-1.5 mm. The material is the same as that of the inner tube 200 (such as refined austenitic stainless steel) to ensure structural strength.

[0034] (III) Casing 300

[0035] The sleeve 300 is a hollow tubular structure, with one end vertically fixed to the other side surface of the flange body 100. It and the inner tube 200 are located on opposite sides of the flange body 100 and are coaxially arranged. Two inwardly protruding stepped structures are integrally formed on the inner wall of the sleeve 300: a first inner step 301 and a second inner step 302. The second inner step 302 is located on the side of the first inner step 301 away from the flange body 100, and the inner diameter of the second inner step 302 is larger than the inner diameter of the first inner step 301. Multiple sets of positioning grooves 303 matching the positioning protrusions 203 are provided on the stepped surface of the inner step 302 (the side surface facing the first inner step 301). The positioning grooves 303 are hemispherical groove structures, the spherical radius of the groove is the same as the spherical radius of the positioning protrusion 203, and the depth is adapted to the protrusion height of the positioning protrusion 203. The multiple sets of positioning grooves 303 are distributed at 0°, 90° and 180° angles along the circumference. The number of positioning grooves 303 in each set is the same as the number of positioning protrusions 203 (such as 3-4), forming a multi-angle positioning adaptation structure.

[0036] (iv) Sealing ring 500 and annular groove 400

[0037] An annular groove 400 is formed on the stepped surface of the first outer step 201 (the side surface facing the sleeve 300). The groove has a depth of 0.5-1mm and a width of 3-5mm. A sealing ring 500 is fitted inside the groove. The sealing ring 500 has an "I" shaped cross-section, including a flat base (thickness 1-2mm) that fits against the bottom surface of the annular groove 400, and an arc-shaped sealing part (arc radius 2-3mm) that protrudes away from the first outer step 201. Correspondingly, a sealing groove matching the sealing ring 500 is formed on the stepped surface of the first inner step 301 (the side surface facing the inner tube 200). The inner surface of the sealing groove is an arc-shaped concave surface, and the radius of the concave surface is consistent with the radius of the arc-shaped sealing part of the sealing ring 500, ensuring that the two fit tightly together.

[0038] (V) Reinforcing Rib Structure

[0039] The reinforcing ribs include radial ribs and annular ribs, both integrally formed and forming a grid-like reinforcing structure with the flange body 100. The radial ribs extend outward from the edge of the central cavity, with the ends extending to the vicinity of the outer periphery of the flange body 100. Their cross-section is a variable cross-section structure: the thickness at the root (near the central cavity) is 1.5-2 times the thickness at the end (near the outer periphery) (e.g., 8mm at the root and 4-5mm at the end), and the ribs have weight-reducing cavities inside (the cavity cross-section is elliptical, with the major axis along the length of the rib). The annular ribs are 2-3 concentric rings, connecting the middle and end of adjacent radial ribs respectively, further improving the overall structure's resistance to deformation.

[0040] The engagement of the positioning protrusion 203 and the positioning groove 303: When two flange forgings are joined, the inner tube 200 of one flange body 100 is inserted into the sleeve 300 of the other flange body 100, so that the stepped surface of the second outer step 202 contacts the stepped surface of the second inner step 302. By rotating the flange body 100, the hemispherical positioning protrusion 203 can slide along the stepped surface of the second inner step 302 until it is embedded in the positioning groove 303 at the target angle (such as 0°, 90° or 180°), achieving rapid positioning. Its advantages are: the design of multiple sets of positioning protrusions 203 (3-4) and multi-angle positioning grooves 303 avoids the problem of easy displacement of the traditional single positioning structure and improves the torsional resistance; the hemispherical concave-convex fit structure reduces the frictional resistance during installation, and can achieve manual rapid docking without tool assistance, improving installation efficiency by more than 40%.

[0041] The sealing mechanism of the sealing ring 500 and the sealing groove: After the inner tube 200 and the sleeve 300 are in place, the stepped surface of the first outer step 201 fits with the stepped surface of the first inner step 301, and the arc-shaped sealing part of the sealing ring 500 is squeezed and embedded into the arc-shaped concave surface of the sealing groove. The flat base is fixed by the annular groove 400 to prevent the sealing ring 500 from shifting circumferentially. Its advantages are: the interference fit between the flat base of the "I"-shaped sealing ring 500 and the annular groove 400 avoids the problem of the traditional sealing ring 500 being easy to fall off; the line contact seal of the arc-shaped concave and convex surface is transformed into a surface contact seal, the contact area is increased by 30%, there is no leakage under the pressure of 0.6-1.6MPa, and the sealing reliability is significantly improved.

[0042] The reinforcing ribs strengthen the structure by dispersing stress at the fixing hole 101 towards the central cavity, while the annular ribs limit the lateral deformation of the radial ribs. Together, they form a "center-periphery" stress transfer path. The variable cross-section design allows the ribs to reduce material usage while maintaining strength, and the weight-reducing cavity further reduces the overall weight. Its advantages are: the grid-like reinforcing structure increases the bending strength of the flange body 100 by 25% and extends the fatigue life to over 100,000 cycles; the weight-reducing cavity design reduces the overall weight by 15-20%, meeting the requirements for lightweight installation.

[0043] The overall workflow of this technical solution is as follows:

[0044] Positioning and docking: The positioning protrusion 203 of the inner tube 200 and the positioning groove 303 of the sleeve 300 are engaged to achieve rapid angular positioning of the two flange bodies 100 (0° / 90° / 180° selectable);

[0045] Sealing and bonding: During the docking process, the 500 arc-shaped sealing part of the sealing ring is pressed and bonded to the arc-shaped concave surface of the sealing groove to form an initial seal;

[0046] Fixing and locking: Pre-tightening force is applied through the bolts in the fixing hole 101, so that the stepped surfaces of the flange body 100, inner tube 200 and sleeve 300 are in close contact, and the sealing ring 500 is further compressed to achieve high pressure sealing;

[0047] Structural reinforcement: The reinforcing ribs disperse the bolt preload and working load through the grid structure, preventing the flange body from deforming by 100%.

[0048] The advantages of this technical solution are:

[0049] Installation efficiency: The multi-angle positioning design adapts to different installation scenarios, and the manual connection time is reduced to 1 / 3 of that of traditional flanges;

[0050] Positioning accuracy: The coordinated engagement of multiple sets of positioning protrusions 203 with the slots controls the positioning error to within ±0.1mm;

[0051] Sealing reliability: The combination of the I-shaped sealing ring 500 and the arc-shaped sealing groove can withstand long-term sealing in a temperature range of -40℃ to 120℃ and a pressure of 1.6MPa.

[0052] Lightweight structure: The variable cross-section of the reinforcing ribs and the weight-reducing cavity design achieve weight reduction while improving strength, thus reducing transportation and installation costs.

[0053] Structural details not explicitly described in this embodiment (such as material selection, specific dimensional tolerances, etc.) can be implemented using conventional techniques in the field.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

[0055] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-positioning internal flange forging with refined austenite, characterized in that: include: The flange body (100) has a central cavity extending through its thickness direction, and a plurality of fixing holes (101) are evenly spaced around the outer side of the central cavity. An inner tube (200) is fixedly connected at one end to one side surface of the flange body (100) and is coaxially arranged with the flange body (100). A first outer step (201) and a second outer step (202) are protruding on the outer wall of the inner tube (200). The second outer step (202) is located between the first outer step (201) and the flange body (100). A plurality of positioning protrusions (203) are circumferentially spaced on the step surface of the second outer step (202). A sleeve (300) is provided, one end of which is fixedly connected to the other side surface of the flange body (100) and is arranged coaxially with the flange body (100). A first inner step (301) and a second inner step (302) are provided on the inner wall of the sleeve (300). The second inner step (302) is located on the side of the first inner step (301) away from the flange body (100). Multiple sets of positioning grooves (303) matching the positioning protrusion (203) are provided on the step surface of the second inner step (302). An annular groove (400) is provided on the surface of the first outer step (201), and a sealing ring (500) is adapted to be installed in the annular groove (400).

2. The multi-positioning inner flange forging with refined austenite as described in claim 1, characterized in that: On the step surface of the second outer step (202), there are 3 to 4 positioning protrusions (203), which are evenly spaced along the circumference.

3. The multi-positioning inner flange forging with refined austenite as described in claim 1, characterized in that: On the step surface of the second inner step (302), the multiple sets of positioning grooves (303) are distributed at 0°, 90° and 180° angles along the circumference, and the number of each set of positioning grooves (303) is the same as the number of positioning protrusions (203).

4. A multi-positioning inner flange forging with refined austenite as described in claim 1, characterized in that: The depth of the annular groove (400) is 0.5 to 1 mm, and the width of the annular groove (400) is adapted to the cross-sectional width of the sealing ring (500).

5. A multi-positioning inner flange forging with refined austenite as described in claim 1, characterized in that: The sealing ring (500) has an "I" shaped cross section, including a planar base that fits against the bottom surface of the annular groove (400) and an arc-shaped sealing portion that protrudes away from the first outer step (201).

6. A multi-positioning inner flange forging with refined austenite as described in claim 3, characterized in that: The positioning protrusion (203) is a hemispherical protrusion structure, and the positioning groove (303) is a hemispherical groove structure that matches the hemispherical protrusion structure.

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