Light wedge-shaped pressure-bearing blanking cap
By using lightweight wedge-shaped pressure-bearing plug cover made of carbon fiber reinforced thermosetting resin-based composite, the existing plug cover is easily damaged, has large weight and poor high temperature resistance, and has achieved the effect of increasing the structural pressure-bearing strength under low pressure conditions, even breaking the panel after high pressure crushing does not hurt people, weight reduction of more than 70%, and working in a wide temperature range for a long time is achieved.
Patent Information
- Application Number
- CN202510184162.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-06-13
AI Technical Summary
The existing plug cover is prone to damage, has a large weight and poor high temperature resistance.
A lightweight wedge-shaped pressure-bearing cover made of carbon fiber reinforced thermosetting resin-based composite material includes an upper cover plate, a wedge plunger and a lower panel. The central section of the wedge segment of the wedge plunger is an isosceles trapezoid with a base angle of 30° to 75°, and multiple rows of pre-set stress grooves are provided on the lower panel.
It solves the problem that traditional metal blocking covers are prone to sharp corner damage. The pressure bearing strength of the structure is greatly improved under low pressure conditions, and the bonding is tighter; the panel after crushing under high pressure is cracked into uniform fragments, which is not easy to hurt people, and the weight is reduced by more than 70%, and can work continuously at -50℃ to 260℃ for more than 24 hours.
Smart Images
Figure CN120140559A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of pressure-bearing structures, and particularly relates to a lightweight wedge-shaped pressure-bearing plug cover. Background Art
[0002] The existing plug cover is provided with a sheet-like structure, and a grid-shaped stress groove is designed on the surface. When subjected to external pressure, the shear force on the sheet-like pressure-bearing structure is too large, and it will fracture at a certain sheet-like point, resulting in structural damage and sharp corners, which are easy to hurt people. Most of the existing plug cover materials are metals, with a large weight, and ordinary polymer material plug covers are not resistant to high temperatures. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a lightweight wedge-shaped pressure-bearing plug cover, which overcomes the disadvantages of the existing plug cover being easily damaged, having a large weight and poor high-temperature resistance.
[0004] To solve the above technical problem, the present invention adopts the following technical solutions: The plug cover of the present invention is made of a carbon fiber reinforced thermosetting resin matrix composite material, and includes an upper cover plate, a wedge-shaped plunger and a lower cover plate; for the wedge-shaped section of the wedge-shaped plunger, its central cross-section is an isosceles trapezoid with a base angle of 30° to 75°; the lower cover plate is provided with multiple rows of pre-stressed grooves; the upper end of the wedge-shaped plunger is connected to the upper cover plate, and the lower end structure size matches the pre-stressed grooves and is located within the pre-stressed grooves. In the use state, the lower cover plate of the plug cover of the present invention is stressed from bottom to top. The wedge-shaped plunger and the pre-stressed grooves are equivalent to being connected by rivets. In the case of low pressure, the locking is tighter; when the pressure is higher and exceeds the pressure-bearing capacity of the lower cover plate, the pressure transmitted by the wedge-shaped plunger to the lower cover plate breaks the lower cover plate into uniform fragments, which are not easy to hurt people, but the wedge-shaped plunger can still remain intact, thereby achieving the purpose of the present invention.
[0005] A lightweight wedge-shaped pressure-bearing plug cover includes an upper cover plate, a lower cover plate and a wedge-shaped plunger; the upper cover plate, the wedge-shaped plunger and the lower cover plate are all made of a fiber reinforced resin matrix composite material; the wedge-shaped plunger includes a wedge-shaped section, and the central cross-section of the wedge-shaped section is an isosceles trapezoid with a base angle of 30° to 75°; the lower cover plate is provided with multiple rows of pre-stressed grooves, and the axial center distance between adjacent rows of pre-stressed grooves is not less than 20 mm and not less than 0.4 times the diameter of the largest characteristic circle of the top cross-section of the pre-stressed groove (4); the upper end of the wedge-shaped plunger is connected to the upper cover plate, and the lower end structure size matches the pre-stressed grooves and is located within the pre-stressed grooves.
[0006] Preferably, the cross-section of the pre-stressed groove is circular, and its characteristic circle is itself; when the cross-section of the pre-stressed groove is quadrilateral, its characteristic circle is the circumscribed circle of the quadrilateral.
[0007] Preferably, the upper cover plate and the wedge-shaped plunger are of a split structure; the upper cover plate is provided with holes, and the positions and numbers of the holes are the same as those of the pre-stressed grooves on the lower cover plate; the upper end of the wedge-shaped plunger matches the hole structure size and is located within the holes.
[0008] Further preferably, the holes are of equal-diameter structure; the wedge-shaped plunger further includes a cylindrical section located at the upper end of the wedge-shaped section, with an outer diameter consistent with that of the holes; the cylindrical section of the wedge-shaped plunger is located within the holes, and the wedge-shaped section is located within the pre-stress groove.
[0009] Further preferably, the holes are of equal-wedge structure; the upper end of the wedge-shaped section of the wedge-shaped plunger is located within the holes, and the lower end of the wedge-shaped section is located within the pre-stress groove.
[0010] Preferably, the upper cover plate and the wedge-shaped plunger are of an integral structure, and the wedge-shaped plunger is located on the lower surface of the upper cover plate, with its position and quantity matching the pre-stress grooves on the lower panel.
[0011] Further preferably, the lower panel is of a circular plate structure, with an annular notch provided on the outer side of the upper end, and the outer diameter of the formed middle circular plate is consistent with that of the upper cover plate.
[0012] The beneficial effects of the present invention are as follows: 1. Solve the problem that the traditional metal plug cover is prone to sharp corner damage under stress concentration; 2. Under low-pressure conditions, the structural bearing strength is greatly improved and the combination is closer; 3. After being broken under high pressure, the panel splits into uniform fragments and is not easy to hurt people. 4. The weight is reduced by more than 70% compared with the metal plug cover. 5. It can work continuously for more than 24 hours at -50°C to 260°C. Description of the Drawings
[0013] Figure 1 It is a schematic structural diagram of the light wedge-shaped pressure-bearing plug cover of the present invention; Figure 2 It is a schematic structural diagram of the upper cover plate in Embodiment 1; Figure 3 It is a schematic structural diagram of the lower panel in Embodiment 1; Figure 4 It is Figure 3 A-A sectional view; Figure 5 It is a schematic structural diagram of the upper cover plate in Embodiment 3.
[0014] Among them, 1 - upper cover plate, 2 - wedge-shaped plunger, 3 - lower panel, 4 - pre-stress groove. Detailed Embodiments
[0015] The present invention will be further described below in conjunction with embodiments, but it shall not be construed as a limitation to the content of the present invention.
[0016] Embodiment 1 A light wedge-shaped pressure-bearing plug cover structure, made of a carbon fiber-reinforced epoxy resin-based composite material, wherein the mass content of carbon fiber is 15% and the mass content of epoxy resin is 85%, including an upper cover plate 1, a wedge-shaped plunger 2 and a lower panel 3, as Figure 1 shown.
[0017] The upper cover plate 1 is a circular plate structure, and holes are provided on the lower surface, such as Figure 2 and 3 shown. The diameter of the holes is 8 mm; the holes are distributed in a concentric circle structure, and the center of the circle coincides with the central axis of the upper cover plate 1; there is one hole in the first circle, and its center is located at the position of the central axis of the upper cover plate 1; there are eight holes in the second circle, and their centers are evenly distributed on a circle with the center of the upper cover plate 1 as the center and a diameter of 25 mm; there are sixteen holes in the third circle, and their centers are located on a circle with the center of the upper cover plate 1 as the center and a diameter of 50 mm.
[0018] The wedge-shaped plunger 2 is composed of a cylindrical section at the upper end and a frustum section at the lower end. The diameter of the cylindrical section is 8 mm, which is the same as the diameter of the holes in the upper cover plate 1. The structural dimensions of the frustum section are the same as those of the pre-stress groove 4 in the lower panel 3, which is a structure with a larger upper part and a smaller lower part. The upper circle diameter is 8 mm, the central section is an isosceles trapezoid, and the base angle is 30°. The height of the cylindrical section is the same as the thickness of the upper cover plate 1, and the height of the frustum section is the same as the thickness of the lower panel 3.
[0019] The lower panel 3 is a circular plate structure, and a circular ring-shaped notch is provided on the outer side of the upper end, and the outer diameter of the formed middle circular plate is the same as the outer diameter of the upper cover plate 1. A through pre-stress groove 4 is provided on the middle circular plate, and the quantity and position are matched with the holes in the upper cover plate 1. The sum of the volumes of all the pre-stress grooves 4 accounts for 38% of the volume of the lower panel 3.
[0020] The number of the wedge-shaped plungers 2 in this embodiment is the same as the number of the holes in the upper cover plate 1. The cylindrical section at the upper end is located in the holes of the upper cover plate 1, and the frustum section at the lower end is located in the pre-stress grooves 4 of the lower panel 3.
[0021] The light wedge-shaped pressure-bearing plug cover of this embodiment can work continuously for 24 hours at -50°C to 220°C, and can withstand a maximum chamber pressure of 450 MPa. When it ruptures, the fragments are uniform and there are no sharp corners to cause injury.
[0022] Embodiment 2 The difference from Embodiment 1 is that: The structure of the light wedge-shaped pressure-bearing plug cover is made of a carbon fiber reinforced phenolic resin matrix composite material, in which the mass content of carbon fiber is 18% and the mass content of epoxy resin is 82%.
[0023] The holes in the upper cover plate 1, the wedge-shaped plungers 2 and the pre-stress grooves 4 in the lower panel 3 are all frustum-shaped structures. The base angle of the central section is 75°. The structural dimensions of the holes in the upper cover plate 1 match the upper end of the wedge-shaped plunger 2, and the structural dimensions of the pre-stress grooves 4 in the lower panel 3 match the lower end of the wedge-shaped plunger 2. The outer diameter of the largest cross-section circle of the pre-stress groove 4 located on the top plate of the lower panel 3 is 8 mm. The sum of the volumes of all the pre-stress grooves 4 accounts for 40% of the volume of the lower panel 3.
[0024] The upper end of the wedge-shaped plunger 2 is located in the hole of the upper cover plate 1, and the lower end is located in the pre-stress groove 4 of the lower panel 3.
[0025] The light wedge-shaped pressure-bearing plug cover of this embodiment can work continuously at -35°C to 250°C for 36 hours, and can withstand a chamber pressure of up to 450 MPa at most. When it ruptures, the fragments are uniform, without sharp corners and do not hurt people.
[0026] Embodiment 3 The difference from Embodiment 1 is that: The structure of the light wedge-shaped pressure-bearing plug cover is made of glass fiber-reinforced epoxy resin-based composite material, in which the mass content of carbon fiber is 20% and the mass content of epoxy resin is 80%.
[0027] The upper cover plate 1 and the wedge-shaped plunger 2 of this embodiment are of an integral structure. As Figure 5 shown. The wedge-shaped plunger 2 is of a regular frustum of a pyramid structure, and the central section is an isosceles trapezoid with a bottom angle of 60°. The outer diameter of the circumscribed circle of the largest section of the pre-stress groove 4 on the top plate of the lower panel 3 is 8 mm. The wedge-shaped plungers 2 are arranged in a concentric circle structure on the lower surface of the upper cover plate 1, and the center of the circle coincides with the central axis of the upper cover plate 1; there is one wedge-shaped plunger 2 in the innermost circle, and its axis coincides with the central axis of the upper cover plate 1; there are four wedge-shaped plungers 2 in the second circle, and their central axes are evenly distributed on a circle with the central axis of the upper cover plate 1 as the center and a diameter of 20 mm; there are twelve wedge-shaped plungers 2 in the third circle, and their central axes are evenly distributed on a circle with the central axis of the upper cover plate 1 as the center and a diameter of 40 mm.
[0028] The structural dimensions of the pre-stress groove 4 of the lower panel 3 match those of the wedge-shaped plunger 2, and the sum of the volumes of all the pre-stress grooves 4 accounts for 25% of the volume of the lower panel 3.
[0029] The wedge-shaped plunger 2 is located in the pre-stress groove 4 of the lower panel 3.
[0030] The light wedge-shaped pressure-bearing plug cover of this embodiment can work continuously at -30°C to 260°C for 48 hours, and can withstand a chamber pressure of up to 560 MPa at most. When it ruptures, the fragments are uniform, without sharp corners and do not hurt people.
[0031] Embodiment 4 The difference from Embodiment 1 is that: The sum of the volumes of all the pre-stress grooves 4 accounts for 28% of the volume of the lower panel 3.
Claims
1. A light wedge-shaped pressure-bearing plug cover, comprising an upper cover plate and a lower panel, characterized in that: It also includes a wedge-shaped plunger (2); the upper cover plate (1), the wedge-shaped plunger (2) and the lower panel (3) are all made of a carbon fiber reinforced thermosetting resin-based composite material, wherein the carbon fiber mass content is 15% to 20% and the thermosetting resin mass content is 80% to 85%; the wedge-shaped plunger (2) includes a wedge-shaped segment, the central cross-section of the wedge-shaped segment is an isosceles trapezoid with a base angle of 30° to 75°; the lower panel (3) is provided with a plurality of rows of prestressed grooves (4), the axial center distance of adjacent rows of prestressed grooves (4) is not less than 20 mm, and is not less than 0.4 times the maximum characteristic circle of the top cross-section of the prestressed groove (4); the upper end of the wedge-shaped plunger (2) is connected to the upper cover plate (1), and the lower end has a structural dimension that matches the prestressed groove (4) and is located in the prestressed groove (4).
2. According to claim 1, a lightweight wedge-shaped pressure-bearing plugging cover is characterized in that: The cross section of the prestressed groove (4) is circular. Its characteristic circle is itself; the cross section of the prestressed groove (4) is a quadrilateral, and its characteristic circle is the circumscribed circle of the quadrilateral.
3. According to claim 1, a lightweight wedge-shaped pressure-bearing plugging cover is characterized in that: The upper cover plate (1) and the wedge-shaped plunger (2) are of a split structure; the upper cover plate (1) is provided with holes, and the positions and number of the holes are consistent with the pre-stressed grooves (4) of the lower panel (3); The upper end of the wedge-shaped plunger (2) matches the structural size of the hole and is located in the hole.
4. A lightweight wedge-shaped pressure-bearing plugging cover according to claim 3, characterized in that: The hole is of equal diameter structure; the wedge-shaped plunger (2) further comprises a cylindrical section, which is located at the upper end of the wedge-shaped section and has an outer diameter consistent with that of the hole; the cylindrical section of the wedge-shaped plunger (2) is located in the hole, and the wedge-shaped section is located in the pre-stressed groove (4).
5. According to claim 3, a lightweight wedge-shaped pressure-bearing plugging cover is characterized in that: The hole is of an isowed wedge structure; the upper end of the wedge section of the wedge plunger (2) is located in the hole, and the lower end of the wedge section is located in the pre-stressed groove (4).
6. A lightweight wedge-shaped pressure-bearing plugging cover according to claim 1, characterized in that: The upper cover plate (1) and the wedge-shaped plunger (2) are an integrated structure; the wedge-shaped plunger (2) is located on the lower surface of the upper cover plate (1), and the position and number of the wedge-shaped plunger match the pre-stressed grooves (4) of the lower panel.
7. A lightweight wedge-shaped pressure-bearing plugging cover according to claim 1, characterized in that: The lower panel (3) is a circular plate structure, with a circular ring-shaped notch provided on the outer side of the upper end, so that the outer diameter of the intermediate circular plate is consistent with the outer diameter of the upper cover plate (1).
8. A lightweight wedge-shaped pressure-bearing plugging cover according to claim 1, characterized in that: When subjected to a chamber pressure of 450 MPa, the sum of the volumes of the pre-stressed grooves (4) accounts for 38% to 40% of the volume of the lower panel 3; when subjected to a chamber pressure of 560 MPa, the sum of the volumes of the pre-stressed grooves (4) accounts for 25% to 28% of the volume of the lower panel 3.