An insulating product tooling with an inner hole and a flanged flange and its forming method

Abstract

The present invention proposes a tooling for insulating products with an inner hole and a flanging flange and a molding method thereof, belonging to the technical field of molding of insulating composite materials. It solves the problems of existing composite materials products such as internal looseness, interlayer delamination, reduced bonding strength between composite materials and metal facades, and serious impact on insulation performance. It includes a front cover, a rear cover, an iron core, an insulating material layer, a fiber winding pressure layer and a petal pressure ring. The front cover and the rear cover are arranged relative to each other and at intervals. The iron core is arranged between the front cover and the rear cover and is respectively connected to the front cover and the rear cover. The outer surface of the iron core is fitted with an insulating material layer. The upper and lower sides of the iron core are respectively provided with petal pressure rings. The two petal pressure rings are both in contact with the insulating material layer, and the two petal pressure rings are connected by a fiber winding pressure layer. It is mainly used for the molding of an insulating product with an inner hole and a flanging flange.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating composite material product forming, and in particular relates to an insulating product tooling with an inner hole and a flanging flange and a forming method thereof. Background Art

[0002] Nuclear power insulation products often consist of an iron core and a composite insulation layer, each with a defined thickness, density, and insulation capacity. For cylindrical insulation components with flanged flanges and column segments, fiberglass can be used in the column segments for tension winding. This maintains a tight fit between the iron core and the composite insulation layer after curing. However, the flange end faces are vertical, so sufficient extrusion pressure cannot be applied during molding. This can lead to poor product formation even with increased stacking thickness.

[0003] Before the product is cured, the formed fiber winding layer is in contact with the core facade with a certain amount of pre-tightening and extrusion. The thermosetting epoxy resin will shrink during curing. Due to the influence of resin shrinkage, the composite material product is prone to internal looseness, interlayer delamination, reduced bonding strength between the composite material and the metal facade, and serious impact on insulation performance. Summary of the Invention

[0004] In view of this, the present invention aims to propose a tooling for an insulating product with an inner hole and a flanging flange and a forming method thereof, so as to solve the problems of existing composite materials such as internal looseness, interlayer delamination, reduced bonding strength between composite materials and metal facades, and serious impact on insulation performance.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a tooling for insulating products with an inner hole and a flanging flange, which includes a front cover plate, a rear cover plate, an iron core, an insulating material layer, a fiber winding pressure layer and a petal pressure ring. The front cover plate and the rear cover plate are arranged opposite to each other and at intervals. The iron core is arranged between the front cover plate and the rear cover plate and is respectively matched with the front cover plate and the rear cover plate. The outer surface of the iron core is fitted with an insulating material layer, and the upper and lower sides of the iron core are respectively provided with petal pressure rings. The two petal pressure rings are both in contact with the insulating material layer, and the two petal pressure rings are connected by the fiber winding pressure layer.

[0006] Furthermore, the split-petal pressure ring includes a pressure ring and a plurality of wedge-shaped pressure plates, one side of the pressure ring is in contact with the insulating material layer, and the plurality of wedge-shaped pressure plates are arranged on the other side of the pressure ring at even intervals along the circumferential direction, one end of the wedge-shaped pressure plate is connected to the pressure ring, and the other end is connected to the rear end plate, and a plurality of grooves are evenly spaced on the oblique side of the wedge-shaped pressure plate, and the fiber-wound pressure layer is arranged in the groove.

[0007] Furthermore, the outer surface of the iron core includes a vertical segment and a cylindrical segment, and the insulating material layer is respectively arranged to fit the vertical segment and the cylindrical segment. One side of the pressure ring contacts and cooperates with the insulating material layer on the vertical segment of the iron core, and the bottom of the wedge-shaped pressure plate contacts and cooperates with the insulating material layer on the cylindrical surface of the iron core.

[0008] Furthermore, the front cover plate and the rear cover plate are connected via an axial pull rod, and the axial pull rod is provided through the center of the front cover plate and the center of the rear cover plate.

[0009] Furthermore, two fastening nuts are provided on the axial pull rod, and the two fastening nuts are respectively provided on the outer surfaces of the front cover plate and the rear cover plate and are in contact with and cooperate with the front cover plate and the rear cover plate.

[0010] Furthermore, gaskets are provided between the fastening nuts and the front cover plate and the rear cover plate.

[0011] The present invention also provides a method for forming a tooling for an insulating product with an inner hole and a flanging flange, which comprises the following steps:

[0012] Step 1: Assemble the front cover, rear cover, iron core and axial tie rod to form an assembly, and tighten them with fastening nuts;

[0013] Step 2: The S2 glass fiber yarn is wound on the yarn rack for yarn processing;

[0014] Step 3: Sandblast the outer surface of the core;

[0015] Step 4: Prepare SW-220B-90a high-strength glass fiber cloth;

[0016] Step 5: Install the assembly onto the chuck of the horizontal winding machine, with the claws clamping the upper end face of the core, making sure the core is flush with the end face of the chuck;

[0017] Step 6: Prepare glue solution;

[0018] Step 7: Alternately wind S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth around the cylindrical section of the core, and soak the glue in the winding process to form an insulating material layer on the cylindrical section of the core;

[0019] Step 8: Install a split pressure ring on the outside of the insulating material layer on the cylindrical segment of the core, and butt the two split pressure rings to form a circumference. The bottom surface of the split pressure ring is attached to the insulating material layer on the cylindrical segment of the core, and one side of the split pressure ring is spaced from the vertical segment of the core. After the two split pressure rings are butt-jointed, use yellow tape to wrap around the top surface of the two split pressure rings to fix them. After fixation, wrap S2 glass fiber yarn that is not soaked in glue around the groove of the split pressure ring to form a fiber-wound pressure layer. Remove the yellow tape after the fiber-wound pressure layer is formed.

[0020] Step 9: Alternately wind S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth in the gap between the vertical section of the iron core and the pressure ring of the split pressure ring, and soak the glue in the winding process to form an insulating material layer on the vertical section of the iron core;

[0021] Step 10: Lift the entire assembly down from the horizontal winding machine and clean the surface;

[0022] Step 11: Place the entire assembly into the oven for curing and forming. Place the entire assembly vertically with the front cover facing downward in the curing oven. Heat the assembly to 90-100°C and keep it warm for 2-4 hours. Then heat the assembly to 110-120°C and keep it warm for 1-2 hours. Then heat the assembly to 150-160°C and keep it warm for 4-6 hours.

[0023] Furthermore, the glue components in step 6 include bisphenol series epoxy resin, multifunctional epoxy resin, anhydride curing agent, active diluent and accelerator.

[0024] Furthermore, in step 8, the top surface of the fiber-wound pressurizing layer is flush with the top of the groove.

[0025] Furthermore, in the insulating material layers in steps 7 and 9, the S2 glass fiber yarn and the SW-220B-90a high-strength glass fiber cloth are laid in a 4:1 ratio and are alternately wound and laid to form the insulating material layers.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. After the cylindrical structural layer of the insulating part is formed, the present invention installs a split-type tooling, uses fiber winding as a whole, wet winding to fill the flange vertical gap, uses fiber winding tension to adaptively apply continuous pressure, and obtains an insulating product blank after curing. After mechanical processing, the insulating product is obtained, which saves manpower, shortens molding time, and ensures the density of the insulating structure layer, the bonding effect after curing, and the insulation performance;

[0028] 2. The present invention uses a horizontal winding machine for winding, which has stable and reliable clamping, high forming efficiency and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic cross-sectional view of the overall structure of an insulation product tooling with an inner hole and a flanging flange according to the present invention;

[0031] Figure 2 This is a front view of the butt connection of two-petal pressure rings of an insulation product tooling with an inner hole and a flanging flange according to the present invention;

[0032] Figure 3 This is a schematic structural diagram of an assembly formed by assembling a front cover plate, a rear cover plate, an iron core and an axial pull rod of an insulating product tooling with an inner hole and a flanging flange according to the present invention;

[0033] Figure 4 This is a schematic structural diagram of an assembly of an insulating product tooling with an inner hole and a flanging flange according to the present invention, wherein the cylindrical section of the iron core is wrapped with an insulating material layer and then a petal pressure ring is installed;

[0034] Figure 5 This is a schematic structural diagram of the vertical section of the iron core of the insulating product tooling with an inner hole and a flanging flange described in the present invention after being wrapped with an insulating material layer.

[0035] 1-front cover, 2-iron core, 3-insulating material layer, 4-fiber winding pressure layer, 5-rear cover, 6-axial pull rod, 7-gasket, 8-fastening nut, 9-petal pressure ring. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0037] See also Figure 1-5 To illustrate this embodiment, a tooling for insulating products with an inner hole and a flanging flange includes a front cover 1, a rear cover 5, an iron core 2, an insulating material layer 3, a fiber-wound pressure layer 4 and a petal pressure ring 9. The front cover 1 and the rear cover 5 are arranged opposite to each other and at intervals. The iron core 2 is arranged between the front cover 1 and the rear cover 5 and is respectively connected to the front cover 1 and the rear cover 5. The outer surface of the iron core 2 is fitted with an insulating material layer 3. The upper and lower sides of the iron core 2 are respectively provided with petal pressure rings 9. The two petal pressure rings 9 are both in contact with the insulating material layer 3. The two petal pressure rings 9 are connected by the fiber-wound pressure layer 4.

[0038] The split pressure ring 9 in this embodiment includes a pressure ring and multiple wedge-shaped pressure plates, one side of the pressure ring contacts and cooperates with the insulating material layer 3, and the multiple wedge-shaped pressure plates are all arranged on the other side of the pressure ring at uniform intervals along the circumferential direction, one end of the wedge-shaped pressure plate is connected to the pressure ring, and the other end is connected to the rear end plate, a plurality of grooves are evenly spaced on the hypotenuse of the wedge-shaped pressure plate, the fiber winding pressure layer 4 is arranged in the groove, the outer surface of the iron core 2 includes a vertical segment and a cylindrical segment, and the insulating material layer 3 is respectively fitted with the vertical segment and the cylindrical segment, one side of the pressure ring contacts and cooperates with the insulating material layer 3 on the vertical segment of the iron core 2, and the bottom of the wedge-shaped pressure plate contacts and cooperates with the insulating material layer 3 on the cylindrical surface of the iron core 2, the wedge-shaped pressure plate is used to contact and pressurize the insulating material layer 3 on the cylindrical surface of the iron core 2, and the gap between one side of the pressure ring and the vertical segment of the iron core 2 is used for fiber wet winding to fill and form the insulating material layer 3, and the fiber winding tension is used to adaptively and continuously pressurize.

[0039] After the cylindrical structural layer of the insulating part is formed in this embodiment, the petal pressure ring 9 is installed, and the fiber is wound as a whole, and the flange vertical gap is filled by wet winding. The fiber winding tension is adaptively and continuously pressurized. After curing, the insulating product blank is obtained, and the insulating product is obtained after mechanical processing, which saves manpower, shortens the molding time, and ensures the density of the insulating structure layer, the bonding effect after curing, and the insulation performance.

[0040] In this embodiment, the front cover plate 1 and the rear cover plate 5 are connected via an axial pull rod 6 , and the axial pull rod 6 is provided through the center of the front cover plate 1 and the center of the rear cover plate 5 .

[0041] In this embodiment, two fastening nuts 8 are provided on the axial pull rod 6. The two fastening nuts 8 are respectively arranged on the outer surfaces of the front cover plate 1 and the rear cover plate 5 and are in contact with the front cover plate 1 and the rear cover plate 5. The function of the fastening nuts 8 is to combine and fasten the front cover plate 1, the rear cover plate 5, the iron core 2 and the axial pull rod 6.

[0042] In this embodiment, washers 7 are provided between the fastening nut 8 and the front cover plate 1 and the rear cover plate 5 .

[0043] This embodiment also provides a method for forming a tooling for an insulating product with an inner hole and a flanging flange, which comprises the following steps:

[0044] Step 1: Assemble the front cover 1, rear cover 5, iron core 2 and axial tie rod 6 to form an assembly, and fasten them with fastening nuts 8. In this embodiment, the rear cover 5 is stepped, and the inner surface of the iron core 2 is matched. There is a circular hole in the center to facilitate the insertion of the axial tie rod 6. The outer diameter of the rear cover 5 is 30mm-60mm larger than the diameter of the cylindrical end face of the right side of the iron core 2. Use a thimble to push the center hole behind the axial tie rod 6 tightly, and fasten the iron core 2 to the front cover 1 and rear cover 5 through the axial tie rod 6 and fastening nuts 8;

[0045] Step 2: The S2 glass fiber yarn is put on a winding creel. In this embodiment, 30 balls of S2 glass fiber yarn are installed on the winding creel, the fiber linear density is 245±8Tex, and the yarn spreading width is adjusted to 10mm-20mm.

[0046] Step 3: sandblasting the outer surface of the core 2 to increase the roughness of the outer surface of the core 2 so as to better fit the insulating material layer 3 to the outer surface of the core 2. The sandblasting process in this embodiment is a prior art and will not be described in detail here.

[0047] Step 4: Prepare SW-220B-90a high-strength glass fiber cloth. In this embodiment, the thickness of the high-strength glass fiber cloth is 0.22 mm.

[0048] Step 5: Install the assembly onto the chuck of the horizontal winding machine. Clamp the upper end face of the core 2 with the claws. Make sure the core 2 is flush with the end face of the chuck. Make sure the axis of the core 2 is coaxial with the rotation axis of the chuck.

[0049] Step 6: Prepare the glue solution by mixing the various components of the glue solution in a certain proportion;

[0050] Step 7: Alternately wind S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth around the cylindrical section of the core 2 in a hoop direction, and soak the adhesive in the winding process to form an insulating material layer 3 on the cylindrical section of the core 2. In this embodiment, the winding thickness of the cylindrical section of the core 2 is 5 mm to 10 mm, and the fiber winding tension is adjustable in the range of 300 N to 500 N.

[0051] Step 8: Install the split pressure ring 9 on the outside of the insulating material layer 3 on the cylindrical section of the iron core 2, and connect the two split pressure rings 9 to form a circumference. The bottom surface of the split pressure ring 9 is attached to the insulating material layer 3 on the cylindrical section of the iron core 2, and the pressure ring side of the split pressure ring 9 is spaced from the vertical section of the iron core 2. After the two split pressure rings 9 are connected, use yellow tape to wrap around the top surface of the two split pressure rings 9 to fix them. After fixing, wrap the yellow tape around the groove of the split pressure ring 9. A fiber-wound pressure layer 4 is formed around the unsoaked S2 glass fiber yarn, and the yellow tape is removed after the fiber-wound pressure layer 4 is formed. In this embodiment, after the two petals of the split pressure ring 9 are butt-jointed, the gap between the two butting interfaces on both sides is less than 4 mm. The role of the yellow tape is to pre-fix the two petals of the split pressure ring 9 after butt-jointing. After the fiber-wound pressure layer 4 is formed, the yellow tape is removed. The gap between one side of the pressure ring of the split pressure ring 9 and the vertical section of the iron core 2 is 5 mm-15 mm.

[0052] Step 9: Alternately wind S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth into the gap between the vertical section of the iron core 2 and the pressure ring of the split pressure ring 9, and while winding, soak the adhesive to form an insulating material layer 3 on the vertical section of the iron core 2. In this embodiment, the top of the insulating material layer 3 on the vertical section of the iron core 2 is flush with the top surface of the iron core 2;

[0053] Step 10: Lift the entire assembly down from the horizontal winding machine and clean the surface;

[0054] Step 11: Place the entire assembly into the oven for curing and molding. Place the entire assembly vertically with the front cover 1 facing downward in the curing oven. Heat the assembly to 90-100°C and keep it warm for 2-4 hours. Then heat the assembly to 110-120°C and keep it warm for 1-2 hours. Then heat the assembly to 150-160°C and keep it warm for 4-6 hours.

[0055] The glue components in step 6 of this embodiment include bisphenol series epoxy resin, multifunctional epoxy resin, acid anhydride curing agent, reactive diluent and accelerator. In this embodiment, the glue is prepared by mixing bisphenol series epoxy resin, multifunctional epoxy resin, acid anhydride curing agent, reactive diluent and accelerator in a mass ratio of (20-50): (60-90): (70-90): (10-20): (1-5).

[0056] In step 8 of this embodiment, the top surface of the fiber-wound pressurizing layer 4 is flush with the top of the groove.

[0057] In the insulating material layer 3 in steps 7 and 9 of this embodiment, the S2 glass fiber yarn and the SW-220B-90a high-strength glass fiber cloth are laid in a 4:1 ratio and are alternately wound and laid to form the insulating material layer.

[0058] This embodiment is applicable to cylindrical fiberglass composite insulation parts with flanges and a maximum outer diameter of 200mm-1000mm.

[0059] The product formed in this embodiment meets the following requirements: the volume resistivity at room temperature is equal to or equal to 1600 MPa GB1410; and the electrical strength at room temperature is greater than or equal to 20 MV / m.

[0060] The embodiments of the present invention disclosed above are intended only to illustrate the present invention. The embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A tooling for insulating products with an inner hole and a flanging flange, characterized in that: It comprises a front cover (1), a rear cover (5), an iron core (2), an insulating material layer (3), a fiber winding pressure layer (4) and a petal pressure ring (9), wherein the front cover (1) and the rear cover (5) are arranged opposite to each other and spaced apart, the iron core (2) is arranged between the front cover (1) and the rear cover (5) and is respectively connected with the front cover (1) and the rear cover (5), the outer surface of the iron core (2) is fitted with an insulating material layer (3), the upper and lower sides of the iron core (2) are respectively provided with petal pressure rings (9), both petal pressure rings (9) are in contact with the insulating material layer (3), the two petal pressure rings (9) are connected through the fiber winding pressure layer (4), and the petal pressure ring (9) comprises a pressure ring and a plurality of wedge-shaped pressure plates, one side of the pressure ring contacts and cooperates with the insulating material layer (3), the plurality of wedge-shaped pressure plates are arranged uniformly at intervals along the circumference on the other side of the pressure ring, one end of the wedge-shaped pressure plate is connected to the pressure ring, and the other end is connected to the rear end plate, a plurality of grooves are uniformly arranged on the oblique side of the wedge-shaped pressure plate, the fiber winding pressure layer (4) is arranged in the groove, the outer surface of the iron core (2) includes a vertical section and a cylindrical section, the insulating material layer (3) is respectively arranged to fit the vertical section and the cylindrical section, one side of the pressure ring contacts and cooperates with the insulating material layer (3) on the vertical section of the iron core (2), and the bottom of the wedge-shaped pressure plate contacts and cooperates with the insulating material layer (3) on the cylindrical surface of the iron core (2).

2. The insulating product tooling with an inner hole and a flanging flange according to claim 1, characterized in that: The front cover plate (1) and the rear cover plate (5) are connected via an axial pull rod (6), and the axial pull rod (6) is arranged through the center of the front cover plate (1) and the center of the rear cover plate (5).

3. The insulating product tooling with an inner hole and a flanging flange according to claim 2, characterized in that: Two fastening nuts (8) are provided on the axial pull rod (6). The two fastening nuts (8) are respectively provided on the outer surfaces of the front cover plate (1) and the rear cover plate (5) and are in contact with and fit the front cover plate (1) and the rear cover plate (5).

4. The insulating product tooling with an inner hole and a flanging flange according to claim 3, characterized in that: Gaskets (7) are provided between the fastening nut (8) and the front cover plate (1) and the rear cover plate (5).

5. A method for forming a tooling for an insulating product with an inner hole and a flanging flange according to any one of claims 1 to 4, characterized in that: It includes the following steps: Step 1: Assemble the front cover (1), the rear cover (5), the iron core (2) and the axial pull rod (6) to form an assembly, and fasten them with a fastening nut (8); Step 2: The S2 glass fiber yarn is wound on the yarn rack for yarn processing; Step 3: performing sand blasting on the outer surface of the iron core (2); Step 4: Prepare SW-220B-90a high-strength glass fiber cloth; Step 5: Install the assembly onto the chuck of the horizontal winding machine, with the claws clamping the upper end surface of the iron core (2) so that the iron core (2) is flush with the end surface of the chuck; Step 6: Prepare glue solution; Step 7: alternately winding S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth around the cylindrical section of the iron core (2), and soaking the adhesive in the winding process to form an insulating material layer (3) on the cylindrical section of the iron core (2); Step 8: Install a split pressure ring (9) on the outer side of the insulating material layer (3) on the cylindrical section of the iron core (2), and form a circumference after the two split pressure rings (9) are connected. The bottom surface of the split pressure ring (9) is attached to the insulating material layer (3) on the cylindrical section of the iron core (2), and one side of the pressure ring of the split pressure ring (9) is spaced from the vertical section of the iron core (2). After the two split pressure rings (9) are connected, use yellow tape to wrap around the top surface of the two split pressure rings (9) to fix them. After fixing, wrap S2 glass fiber yarn that is not soaked in glue around the groove of the split pressure ring (9) to form a fiber winding pressure layer (4), and remove the yellow tape after the fiber winding pressure layer (4) is formed; Step 9: alternately winding S2 glass fiber yarn and SW-220B-90a high-strength glass fiber cloth in the gap between the vertical section of the iron core (2) and the pressure ring of the split pressure ring (9), and while winding, soaking the glue to form an insulating material layer (3) on the vertical section of the iron core (2); Step 10: Lift the entire assembly down from the horizontal winding machine and clean the surface; Step 11: Place the entire assembly in a curing furnace with the front cover (1) facing downwards. Heat the assembly to 90-100°C and keep it warm for 2-4 hours. Then heat it to 110-120°C and keep it warm for 1-2 hours. Then heat it to 150-160°C and keep it warm for 4-6 hours.

6. The method for forming a tooling for an insulating product with an inner hole and a flanging flange according to claim 5, characterized in that: The glue components in step 6 include bisphenol series epoxy resin, multifunctional epoxy resin, anhydride curing agent, active diluent and accelerator.

7. The method for forming a tooling for an insulating product with an inner hole and a flanging flange according to claim 5, characterized in that: In step 8, the top end surface of the fiber winding pressurizing layer (4) is flush with the top of the groove.

8. The method for forming a tooling for an insulating product with an inner hole and a flanging flange according to claim 5, characterized in that: In the insulating material layer (3) in step 7 and step 9, the S2 glass fiber yarn and the SW-220B-90a high-strength glass fiber cloth are laid in a 4:1 ratio and are alternately wound and laid to form the insulating material layer.

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