A mixing device and mixing process for a protective cap of a nuclear power hose assembly
By combining air pressure with mechanical elasticity, a pressure self-regulation mechanism was developed, which solved the problem of inaccurate pressure control in the internal mixer, enabling high-quality production of nuclear power hose protective caps and ensuring product consistency and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CNNC NUCLEAR POWER OPERATION MANAGEMENT CO LTD
- Filing Date
- 2026-02-05
- Publication Date
- 2026-06-09
AI Technical Summary
Existing internal mixers suffer from inaccurate pressure control and large pressure fluctuations during the mixing process, failing to meet the quality requirements for protective caps on nuclear power hoses.
It adopts a pressure self-regulating mechanism that combines air pressure and mechanical elasticity. Through the cooperation of hydraulic cylinders and elastic components, it achieves constant pressure control of the mixing raw materials. Combined with gear dustproof design and a flipping component, it ensures the stability and continuity of the mixing process.
It achieves constant pressure control of materials during the mixing process, improves product consistency and reliability, ensures the continuity and process controllability of the mixing process, and enhances the production quality of nuclear power hose protective caps.
Smart Images
Figure CN121625322B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nuclear power hose processing and manufacturing technology, specifically to a mixing device and mixing process for a protective cap of a nuclear power hose assembly. Background Technology
[0002] Nuclear power hose protective caps are safety protection equipment for nuclear power plants and related facilities. They play a vital role in protecting nuclear power hoses from mechanical damage, chemical corrosion, and external environmental influences. To adapt to the special environment of nuclear power plants, the materials used for nuclear power hose protective caps need to be nuclear-grade radiation resistant, low in volatility, corrosion resistant, and able to withstand high temperatures and pressures. They are also manufactured through intensive refining and mixing processes.
[0003] During the mixing process of raw materials for nuclear power plant hose protective caps, the temperature of the materials affects their fluidity and stress state. The physical and chemical properties of different materials affect their stress response during extrusion. When the internal extrusion stress is too high, the physical and chemical properties of some raw materials decrease, affecting the quality of the product. To improve the mixing effect, the pressure on the raw materials during the mixing process needs to be within a set range. General internal mixers have a large pressure range on the materials during the mixing process, which cannot meet the processing requirements of nuclear power plant hose protective caps. Summary of the Invention
[0004] The purpose of this invention is to solve the problem that existing internal mixers have inaccurate pressure control and large pressure fluctuations during the internal mixing process, which makes it impossible to meet the quality requirements of nuclear power hose protective caps. The invention provides an internal mixing device and process for nuclear power hose assembly protective caps, so as to achieve high-quality and stable production of nuclear power hose protective caps.
[0005] To achieve the above objectives, in one aspect, the present invention provides a mixing device for a protective cap of a nuclear power hose assembly, comprising: a base;
[0006] The mixing assembly, mounted on the base, is used for mixing raw materials.
[0007] The top assembly, located above the mixing assembly, is used to achieve constant pressure downward on the mixing material during the mixing process through a pressure self-regulation mechanism that combines air pressure and mechanical elasticity.
[0008] Drive component, used to drive the mixing component to rotate.
[0009] In one possible implementation, the mixing assembly includes a support frame mounted on the base; a mixing chamber rotatably mounted on the support frame; a connecting turntable rotatably mounted on the support frame; a through hole on the connecting turntable; the other side of the connecting turntable connected to the mixing chamber; a pre-meshing rotor and a post-meshing rotor rotatably mounted on the mixing chamber; the pre-meshing rotor passes through the through hole on the connecting turntable; the pre-meshing rotor and the post-meshing rotor are driven by the drive assembly to perform mixing of the raw materials.
[0010] As one possible implementation, the top assembly includes a hydraulic cylinder mounted on the base;
[0011] The telescopic shaft end of the hydraulic cylinder has a hollow structure, and its internal cavity is connected to an external adjustable pressure air source; an exhaust hole is provided on the cavity at the end of the telescopic shaft of the hydraulic cylinder, and a sealing plug is installed on the exhaust hole. The sealing plug automatically seals the exhaust hole under the action of the connecting device.
[0012] The telescopic shaft of the hydraulic cylinder is equipped with an upper bolt; the upper end of the upper bolt is provided with a connecting shaft, and the lower surface is provided with a pressure sensor; the connecting shaft slides within the cavity at the end of the telescopic shaft of the hydraulic cylinder.
[0013] A guide rod is fixedly installed on the upper end face of the top bolt, and a connecting hole is opened on the frame of the base, through which the guide rod passes.
[0014] As one possible implementation, the connecting device is a connecting pipe installed outside the vent hole. A first elastic element is installed inside the connecting pipe, and the other end of the first elastic element is connected to a sealing plug. The elastic force of the first elastic element on the sealing plug is the same as the set pressure of the internal mixing of the raw materials. A vent hole is provided on the connecting pipe to discharge the gas discharged from the cavity at the end of the telescopic shaft of the hydraulic cylinder.
[0015] As another possible implementation, the connecting device is a connecting pipe installed outside the vent hole; a second telescopic rod is installed inside the connecting pipe, and a second elastic element is installed at the telescopic end of the second telescopic rod. The other end of the second elastic element is connected to the sealing plug. When different mixing raw materials require different mixing pressures, the second elastic element is further compressed or decompressed by the extension and retraction of the second telescopic rod, thereby adjusting the pressure of the second elastic element on the sealing plug, and thus adjusting the set pressure of mixing the mixing raw materials.
[0016] As one possible implementation, the drive assembly includes a drive motor mounted on the base and a gearbox mounted on the base;
[0017] The output end of the drive motor is connected to the input end of the gearbox via a belt; the output end of the gearbox is connected to the rotating shaft of the pre-engagement rotor, a first gear is fixedly mounted on the rotating shaft of the pre-engagement rotor, and a second gear is fixedly mounted on the rotating shaft of the post-engagement rotor; the first gear and the second gear are meshed together.
[0018] The drive motor drives the pre-engagement rotor to rotate through the gearbox, and the pre-engagement rotor drives the post-engagement rotor to rotate through the first gear and the second gear.
[0019] As one possible implementation, a dust cover is installed on the rotating shaft of the pre-engagement rotor, and the dust cover houses the first gear and the second gear within the housing.
[0020] As one possible implementation, the mixing device for the protective cap of the nuclear power hose assembly also includes a flipping assembly mounted on a base; the flipping assembly includes a first telescopic rod rotatably mounted on the base, a steering wheel is mounted on the output shaft end of the first telescopic rod, and the other end of the steering wheel is connected to a connecting turntable on the side away from the drive motor; the extension or retraction of the first telescopic rod causes the mixing box to flip.
[0021] Secondly, to achieve the above objectives, the present invention also provides a mixing process for a nuclear power hose assembly protective cap, using the aforementioned mixing apparatus for the nuclear power hose assembly protective cap, comprising the following steps: S1: According to the formula of the nuclear power hose assembly protective cap, EPDM13561 is added to the mixing assembly, the mixing assembly speed is adjusted to 33 r / min, and mixing is carried out for 2.5 minutes to homogenize the raw materials; S2: According to the formula of the nuclear power hose assembly protective cap, zinc oxide, stearic acid, and antioxidant 445 are added to the mixing assembly, and mixing is carried out for 2-3 minutes; S3: According to the formula of the nuclear power hose assembly protective cap, all remaining raw materials are added to the mixing assembly in sequence, and mixing is carried out for 2-3 minutes; S4: The upper and lower components are repeatedly raised and lowered three times to raise the material temperature in the mixing assembly to 125°C; S5: The mixing assembly is rotated 90° to discharge the mixed rubber compound;
[0022] The order of feeding the remaining raw materials in S3 is as follows: first add Pb3O4, cerium oxide, carbon black N660, carbon black N330, and white paraffin oil, mix them, and then add vulcanizing agent F40-SP2, HVA-2, sulfur, CBS and DM.
[0023] The formula for the protective cap of the nuclear power plant hose assembly includes the following components by weight: EPDM13561 50~80 parts, SBR 10~20 parts, zinc oxide 1~5 parts, stearic acid 1.5~5 parts, Pb3O4 1~5 parts, antioxidant 445 0.5~1 parts, cerium oxide 5~15 parts, carbon black N660 50~90 parts, carbon black N330 20~30 parts, white paraffin oil 10~20 parts, vulcanizing agent F40-SP2 2.5~5 parts, HVA-2 1~3 parts, sulfur 0.3~1 parts, CBS 0.8~2 parts, and DM 0.5~1 parts.
[0024] Beneficial technical effects of the present invention:
[0025] The mixing device for the nuclear power hose protective cap of the present invention achieves constant pressure control of the material by the top plug during the mixing process through a pressure self-regulation mechanism combining air pressure and mechanical elasticity, avoiding the degradation of material performance caused by pressure fluctuations and improving product consistency and reliability; through gear dustproof design and top plug guiding structure, the stability and life of equipment operation are improved, and the continuity and process controllability of the mixing process are guaranteed. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of a mixing device for a nuclear power hose protective cap according to an embodiment of the present invention; Figure 2 This is a side view of an embodiment of the mixing device for the nuclear power hose protective cap of the present invention; Figure 3 A top view of an embodiment of the mixing device for the nuclear power hose protective cap of the present invention; Figure 4 This is a partial structural schematic diagram of an embodiment of the mixing device for the nuclear power hose protective cap of the present invention; Figure 5 This is a structural schematic diagram of one embodiment of the top component; Figure 6 This is a structural schematic diagram of another embodiment of the top component;
[0027] Figure 7 A schematic diagram of one embodiment of a mixing box; Figure 8 This is a schematic diagram of the second telescopic rod in its retracted state; Figure 9 This is a schematic diagram of the second telescopic rod in its extended state.
[0028] In the diagram: 1-base, 11-connecting hole, 2-mixing assembly, 21-support frame, 22-mixing box, 23-connecting turntable, 24-meshing front rotor, 241-first gear, 25-meshing rear rotor, 251-second gear, 3-top assembly, 31-hydraulic cylinder, 311-vent hole, 32-top bolt, 321-connecting shaft, 322-guide rod, 33-sealing plug, 34-connecting pipe, 341-first elastic element, 342-second telescopic rod, 343-second elastic element, 4-air source, 5-drive assembly, 51-drive motor, 52-gearbox, 53-dustproof shell, 6-tilting assembly, 61-first telescopic rod, 62-steering wheel. Detailed Implementation
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0032] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.
[0033] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.
[0035] like Figure 1-9 As shown, the present invention provides a mixing device for a protective cap of a nuclear power hose assembly, including a base 1, a mixing component 2, an upper top component 3, an air source 4, a drive component 5, and a flipping component 6.
[0036] In one possible implementation of this invention, the mixing assembly 2 includes a support frame 21 mounted on the base 1; a mixing chamber 22 is rotatably mounted on the support frame 21; a connecting turntable 23 is rotatably mounted on the support frame 21; a through hole is provided on the connecting turntable 23; the other side of the connecting turntable 23 is connected to the mixing chamber 22; a front engagement rotor 24 and a rear engagement rotor 25 are rotatably mounted on the mixing chamber 22; the front engagement rotor 24 passes through the through hole on the connecting turntable 23, and the front engagement rotor 24 and the rear engagement rotor 25 are driven to move by the driving assembly 5 to effectively mix the mixing raw materials.
[0037] In one possible implementation of this invention, two support frames 21 are provided and located on both sides of the mixing box 22.
[0038] In one possible implementation of this invention, the upper top assembly 3 is positioned above the mixing assembly 2; the upper top assembly 3 includes a hydraulic cylinder 31 mounted on the base 1; the telescopic shaft end of the hydraulic cylinder 31 has a hollow structure, and its internal cavity is connected to an external adjustable pressure air source 4; an exhaust hole 311 is provided on the cavity at the telescopic shaft end of the hydraulic cylinder 31, and a sealing plug 33 is installed on the exhaust hole 311, which automatically seals the exhaust hole 311 under the action of the connecting device; an upper top bolt 32 is installed at the telescopic shaft end of the hydraulic cylinder 31; a connecting shaft 321 is provided at the upper end of the upper top bolt 32, and a pressure sensor is provided on its lower surface; the connecting shaft 321 slides within the cavity at the telescopic shaft end of the hydraulic cylinder 31.
[0039] In the initial state, the air source 4 is set with an air pressure that is less than the internal mixing pressure of the internal mixing raw material. The sealing plug 33 seals the exhaust hole 311. At this time, the pressure of the connecting component is the same as the set pressure of the internal mixing of the internal mixing raw material. Under the action of the air source 4, the connecting shaft 321 is located at the lowest end of the cavity at the end of the telescopic shaft of the hydraulic cylinder 31.
[0040] Adjust the air pressure of air source 4 to the appropriate air pressure when mixing raw materials. After the raw materials are poured into mixing component 2, hydraulic cylinder 31 drives the top bolt 32 to press the raw materials downward. When the top bolt 32 contacts the raw materials, the pressure sensor senses the pressure change and displays it on the external display of the equipment.
[0041] The hydraulic cylinder 31 continues to drive the upper bolt 32 to press the mixing raw material downward. At this time, the mixing raw material is squeezed, the pressure on the pressure sensor gradually increases, and the connecting shaft 321 on the upper bolt 32 slides upward relative to the cavity at the end of the telescopic shaft of the hydraulic cylinder 31.
[0042] After the telescopic shaft of the hydraulic cylinder 31 extends to a certain position, the pressure sensed by the pressure sensor is the same as the set pressure of the mixing raw material. At this time, the telescopic shaft of the hydraulic cylinder 31 no longer extends downward, and the mixing component 2 starts to rotate to mix the mixing raw material. The pressure of the air source 4 is adjusted to be the same as the set pressure of the mixing raw material. In order to keep the pressure on the mixing raw material in a constant range during mixing, the mixing raw material is continuously squeezed and adhered to the upper plug 32 under the action of the mixing component 2. When the pressure on the mixing raw material exceeds the set range during the squeezing process, the reaction force on the upper plug 32 increases, which drives the connecting shaft 321 to slide upward in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31. At this time, the pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 increases, and the sealing plug 33 automatically pushes open the connecting component. After the air pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 increases, the gas is discharged through the exhaust hole 311 to reduce the internal air pressure.
[0043] After the air pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 drops to the set value, the sealing plug 33 automatically re-seals the exhaust hole 311 under the action of the connecting component, ensuring the stability of the air pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31.
[0044] During the extrusion of the raw material in the internal mixing process, the pressure on the lower surface of the adhering upper top bolt 32 decreases, pulling the upper top bolt 32 downward. The air pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 decreases, and the air source 4 continuously fills the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 with gas to keep its internal air pressure constant.
[0045] With the air pressure in the cavity at the end of the telescopic shaft of the hydraulic cylinder 31 remaining constant, the upper bolt 32 maintains a stable pressure on the mixing raw material in the mixing assembly 2, ensuring the mixing effect of the mixing raw material, while ensuring the physical and chemical properties of the mixing raw material, and improving the production quality of the product.
[0046] In one possible implementation of this invention, the drive assembly 5 includes a drive motor 51 mounted on the base 1 and a gearbox 52 mounted on the base 1; the output end of the drive motor 51 is connected to the input end of the gearbox 52 via a belt; the output end of the gearbox 52 is connected to the rotation shaft of the pre-engagement rotor 24, a first gear 241 is fixedly mounted on the rotation shaft of the pre-engagement rotor 24, and a second gear 251 is fixedly mounted on the rotation shaft of the post-engagement rotor 25; the first gear 241 and the second gear 251 are meshed together.
[0047] The drive motor 51 drives the pre-engagement rotor 24 to rotate through the gearbox 52. The pre-engagement rotor 24 drives the post-engagement rotor 25 to rotate through the first gear 241 and the second gear 251, thereby continuously turning and stirring the intensive mixing raw materials to ensure thorough mixing of the intensive mixing raw materials.
[0048] In this invention, as one possible implementation, a dustproof shell 53 is installed on the rotating shaft of the pre-engagement rotor 24. The dustproof shell 53 houses the first gear 241 and the second gear 251 within the shell. The dustproof shell 53 ensures that the first gear 241 and the second gear 251 are not contaminated by external dust during operation, thus ensuring the rotation effect of the pre-engagement rotor 24 and the post-engagement rotor 25.
[0049] In this invention, as one possible implementation, the flipping assembly 6 is mounted on the base 1; the flipping assembly 6 includes a first telescopic rod 61 rotatably mounted on the base 1, a steering wheel 62 is mounted on the output shaft end of the first telescopic rod 61, and the other end of the steering wheel 62 is connected to a connecting turntable 23 on the side away from the drive motor 51.
[0050] When pouring the mixing raw materials into the mixing box 22, the first telescopic rod 61 extends a certain length to rotate the mixing box 22 by 45°, making it convenient to lower the feeding port of the mixing box 22 to pour the mixing materials outward or inward.
[0051] After the raw materials for internal mixing are poured in, the first telescopic rod 61 retracts, causing the mixing box 22 to return to its vertical position;
[0052] When the well-mixed raw materials are poured out of the mixing box 22, the first telescopic rod 61 extends a certain length to rotate the mixing box 22 90°, and pours out the well-mixed raw materials for the next process.
[0053] After the raw materials for internal mixing are poured out, the first telescopic rod 61 retracts, causing the mixing box 22 to return to its vertical position.
[0054] In this invention, as one possible implementation, the connecting device is a connecting pipe 34 installed outside the exhaust port 311. A first elastic element 341 is installed inside the connecting pipe 34. The other end of the first elastic element 341 is connected to the sealing plug 33. The elastic force of the first elastic element 341 on the sealing plug 33 is the same as the set pressure of the internal mixing of the raw materials. The connecting pipe 34 is provided with a vent hole to discharge the gas discharged from the cavity at the end of the telescopic shaft of the hydraulic cylinder 31, so as to prevent the internal air pressure of the connecting pipe 34 from being too high and affecting the pressure of the sealing plug 33.
[0055] In this invention, as another possible implementation, the connecting device is a connecting pipe 34 installed outside the vent 311. A second telescopic rod 342 is installed inside the connecting pipe 34. A second elastic element 343 is installed at the telescopic end of the second telescopic rod 342. The other end of the second elastic element 343 is connected to the sealing plug 33. When different mixing raw materials require different mixing pressures, the second telescopic rod 342 extends and retracts, causing the second elastic element 343 to be further compressed or decompressed, thereby adjusting the pressure of the second elastic element 343 on the sealing plug 33, and thus adjusting the set pressure of mixing the raw materials.
[0056] In one possible implementation of this invention, a guide rod 322 is fixedly installed on the upper end face of the upper top bolt 32. A connecting hole 11 is provided on the frame of the base 1. The guide rod 322 passes through the connecting hole 11. Under the action of the guide rod 322, the hydraulic cylinder 31 avoids the upper top bolt 32 from rotating or shifting its angle when driving the upper top bolt 32 to move up and down, thus ensuring the stability of the upper top bolt 32 during its up and down movement and further improving the mixing effect.
[0057] The present invention also provides a formula for a protective cap for a nuclear power plant hose assembly, comprising the following components by weight: 50-80 parts EPDM13561, 10-20 parts SBR, 1-5 parts zinc oxide, 1.5-5 parts stearic acid, 1-5 parts Pb3O4, 0.5-1 part antioxidant 445, 5-15 parts cerium oxide, 50-90 parts carbon black N660, 20-30 parts carbon black N330, 10-20 parts white paraffin oil, 2.5-5 parts vulcanizing agent F40-SP2, 1-3 parts HVA-2, 0.3-1 part sulfur, 0.8-2 parts CBS, and 0.5-1 part DM.
[0058] The main rubber components are EPDM13561 and SBR; zinc oxide's core function is vulcanization activation, while also providing reinforcement, aging resistance, and thermal conductivity; stearic acid is used as a vulcanization activator, lubricant, and softener, working synergistically with zinc oxide; Pb3O4 is used as a vulcanizing agent, stabilizer, and reinforcing agent; cerium oxide is used as an anti-aging agent, vulcanization activator, and reinforcing agent, improving the interfacial compatibility between rubber and fillers, reducing agglomeration, and enhancing processing performance; white paraffin oil is used as a rubber softener, plasticizer, and processing oil, improving flexibility and cold resistance; vulcanizing agent F40-SP2... It has anti-scorching protection and high crosslinking efficiency; HVA-2 is a multifunctional additive that combines the functions of vulcanizing agent, peroxide crosslinking agent, anti-scorching agent, and adhesion promoter; sulfur is used as a vulcanizing agent; CBS is used as a vulcanization accelerator and after-effect accelerator; DM is used as a vulcanization accelerator and semi-ultra-fast accelerator, forming a synergistic vulcanization system with CBS that complements each other, taking into account processing safety, vulcanization efficiency and comprehensive product performance.
[0059] The formulation of the nuclear power hose protective cap of the present invention is designed for the nuclear power environment and has excellent aging resistance, radiation resistance and mechanical properties. Combined with the mixing process of the present invention, the protective cap can achieve high performance and long service life.
[0060] This invention also provides a mixing process for a protective cap for a nuclear power hose assembly, employing the aforementioned mixing apparatus and formula for the protective cap for a nuclear power hose assembly, and including the following steps:
[0061] S1: According to the formula for the nuclear power hose assembly protective cap, add EPDM13561 to the mixing chamber 22, adjust the drive motor 51 to a rotor speed of 33 r / min, and mix for 2.5 minutes to make the raw materials uniformly mixed; S2: According to the formula for the nuclear power hose assembly protective cap, add zinc oxide, stearic acid, and antioxidant 445 to the mixing chamber 22 and mix for 23 minutes; S3: According to the formula for the nuclear power hose assembly protective cap, add all remaining raw materials to the mixing chamber 22 in sequence and mix for 23 minutes; S4: Repeat lifting and lowering the top bolt 32 three times to raise the material temperature in the mixing chamber 22 to 125℃; S5: Control the first telescopic rod 61 to retract and rotate the mixing chamber 22 90° to discharge the mixed rubber material;
[0062] The order of feeding the remaining raw materials in S3 is as follows: first add Pb3O4, cerium oxide, carbon black N660, carbon black N330, and white paraffin oil, then add vulcanizing agent F40-SP2, HVA-2, sulfur, CBS, and DM.
[0063] Example 1
[0064] This embodiment provides a formula for a protective cap for a nuclear power plant hose assembly, comprising the following components by weight: 60 parts EPDM13561, 10 parts SBR, 1 part zinc oxide, 1.5 parts stearic acid, 1 part Pb3O4, 0.5 parts antioxidant 445, 5 parts cerium oxide, 50 parts carbon black N660, 20 parts carbon black N330, 10 parts white paraffin oil, 2.5 parts vulcanizing agent F40-SP2, 1 part HVA-2, 1 part sulfur, 1.5 parts CBS, and 0.5 parts DM.
[0065] Example 2
[0066] This embodiment provides a formula for a protective cap for a nuclear power plant hose assembly, comprising the following components by weight: 70 parts EPDM13561, 15 parts SBR, 2 parts zinc oxide, 3 parts stearic acid, 3 parts Pb3O4, 1 part antioxidant 445, 8 parts cerium oxide, 60 parts carbon black N660, 25 parts carbon black N330, 15 parts white paraffin oil, 5 parts vulcanizing agent F40-SP2, 3 parts HVA-2, 1 part sulfur, 1.5 parts CBS, and 0.7 parts DM.
[0067] Example 3
[0068] This embodiment provides a formula for a protective cap for a nuclear power plant hose assembly, comprising the following components by weight: 80 parts EPDM13561, 20 parts SBR, 3 parts zinc oxide, 5 parts stearic acid, 5 parts Pb3O4, 1 part antioxidant 445, 10 parts cerium oxide, 80 parts carbon black N660, 30 parts carbon black N330, 20 parts white paraffin oil, 5 parts vulcanizing agent F40-SP2, 3 parts HVA-2, 1 part sulfur, 2 parts CBS, and 1 part DM.
[0069] Example 4
[0070] In this embodiment, the mixing apparatus for the nuclear power hose assembly protective cap described above is used to mix the formulations of Examples 1-3 according to the following mixing process to obtain the nuclear power hose assembly protective cap:
[0071] S1: According to the formula for the nuclear power hose assembly protective cap, add EPDM13561 to the mixing chamber 22, adjust the drive motor 51 to a rotor speed of 33 r / min, and mix for 2.5 minutes to make the raw materials uniformly mixed; S2: According to the formula for the nuclear power hose assembly protective cap, add zinc oxide, stearic acid, and antioxidant 445 to the mixing chamber 22 and mix for 23 minutes; S3: According to the formula for the nuclear power hose assembly protective cap, add all remaining raw materials to the mixing chamber 22 in sequence and mix for 23 minutes; S4: Repeat lifting and lowering the top bolt 32 three times to raise the material temperature in the mixing chamber 22 to 125℃; S5: Control the first telescopic rod 61 to retract and rotate the mixing chamber 22 90° to discharge the mixed rubber material;
[0072] The order of feeding the remaining raw materials in S3 is as follows: first add Pb3O4, cerium oxide, carbon black N660, carbon black N330, and white paraffin oil, then add vulcanizing agent F40-SP2, HVA-2, sulfur, CBS, and DM.
[0073] The performance of the protective caps for the nuclear power hose assemblies prepared according to the formulations of Examples 1-3 was tested, and the test results are as follows.
[0074]
[0075] The nuclear power hose assembly protective cap of the present invention is manufactured by mixing the formula of the nuclear power hose assembly protective cap according to the mixing process of the present invention using the mixing apparatus of the present invention. The resulting nuclear power hose assembly protective cap has excellent strength and aging performance. In particular, the formula of Example 3, by increasing the amount of DM and CBS, forms a synergistic vulcanization system with complementary advantages, resulting in the best strength and aging performance.
[0076] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.
Claims
1. A mixing device for a protective cap of a nuclear power plant hose assembly, characterized in that, include: Base (1); The mixing component (2) is installed on the base (1) and is used to mix the mixing raw materials. The top component (3) is set above the mixing component (2) and is used to achieve constant pressure on the mixing material during the mixing process through a pressure self-regulation mechanism that combines air pressure and mechanical elasticity. Drive component (5) is used to drive the mixing component (2) to rotate; The upper assembly (3) includes a hydraulic cylinder (31) mounted on the base (1). The telescopic shaft end of the hydraulic cylinder (31) is a hollow structure, and its internal cavity is connected to an external adjustable pressure air source (4); an exhaust hole (311) is provided on the cavity at the telescopic shaft end of the hydraulic cylinder (31), and a sealing plug (33) is installed on the exhaust hole (311). The sealing plug (33) automatically seals the exhaust hole (311) under the action of the connecting device. The telescopic shaft end of the hydraulic cylinder (31) is equipped with an upper top bolt (32); the upper end of the upper top bolt (32) is provided with a connecting shaft (321), and the lower surface is provided with a pressure sensor; the connecting shaft (321) slides in the cavity at the end of the telescopic shaft of the hydraulic cylinder (31); A guide rod (322) is fixedly installed on the upper end face of the top bolt (32), and a connecting hole (11) is provided on the frame of the base (1), through which the guide rod (322) passes.
2. The mixing apparatus according to claim 1, characterized in that, The connecting device is a connecting pipe (34) installed outside the exhaust port (311). A first elastic element (341) is installed inside the connecting pipe (34). The other end of the first elastic element (341) is connected to the sealing plug (33). The elastic force of the first elastic element (341) on the sealing plug (33) is the same as the set pressure of the internal mixing of the raw materials. A vent hole is provided on the connecting pipe (34) to discharge the gas discharged from the cavity at the end of the telescopic shaft of the hydraulic cylinder (31).
3. The mixing apparatus according to claim 1, characterized in that, The connecting device is a connecting pipe (34) installed outside the exhaust port (311); a second telescopic rod (342) is installed inside the connecting pipe (34), and a second elastic element (343) is installed at the telescopic end of the second telescopic rod (342). The other end of the second elastic element (343) is connected to the sealing plug (33). When different mixing raw materials require different mixing pressures, the second elastic element (343) is further compressed or decompressed by the extension and retraction of the second telescopic rod (342), thereby adjusting the pressure of the second elastic element (343) on the sealing plug (33) and thus adjusting the set pressure of mixing the mixing raw materials.
4. The mixing apparatus according to claim 1, characterized in that, The mixing assembly (2) includes a support frame (21) mounted on the base (1); a mixing box (22) is rotatably mounted on the support frame (21); a connecting turntable (23) is rotatably mounted on the support frame (21); a through hole is provided on the connecting turntable (23); the other side of the connecting turntable (23) is connected to the mixing box (22); a front engagement rotor (24) and a rear engagement rotor (25) are rotatably mounted on the mixing box (22); the front engagement rotor (24) passes through the through hole on the connecting turntable (23); the front engagement rotor (24) and the rear engagement rotor (25) are driven to move by the driving assembly (5) to mix the mixing raw materials.
5. The mixing apparatus according to claim 4, characterized in that, The drive assembly (5) includes a drive motor (51) mounted on the base (1) and a gearbox (52) mounted on the base (1). The output end of the drive motor (51) is connected to the input end of the gearbox (52) via a belt; the output end of the gearbox (52) is connected to the rotating shaft of the front rotor (24), a first gear (241) is fixedly mounted on the rotating shaft of the front rotor (24), and a second gear (251) is fixedly mounted on the rotating shaft of the rear rotor (25); the first gear (241) and the second gear (251) are meshed together. The drive motor (51) drives the front engagement rotor (24) to rotate through the gearbox (52), and the front engagement rotor (24) drives the rear engagement rotor (25) to rotate through the first gear (241) and the second gear (251).
6. The mixing apparatus according to claim 5, characterized in that, A dust cover (53) is installed on the rotating shaft of the pre-engagement rotor (24), and the dust cover (53) fits the first gear (241) and the second gear (251) inside the housing.
7. The mixing apparatus according to claim 5, characterized in that, It also includes a flipping assembly (6) mounted on the base (1); the flipping assembly (6) includes a first telescopic rod (61) rotatably mounted on the base (1), a steering wheel (62) is mounted on the output shaft end of the first telescopic rod (61), and the other end of the steering wheel (62) is connected to a connecting turntable (23) on the side away from the drive motor (51); the first telescopic rod (61) extends or retracts to drive the mixing box (22) to flip.
8. A mixing process for a protective cap of a nuclear power plant hose assembly, characterized in that, The mixing apparatus described in any one of claims 1-7 comprises the following steps: S1: According to the formula of the nuclear power hose assembly protective cap, take EPDM13561 and put it into the mixing component (2), adjust the rotation speed of the mixing component (2) to 33r / min, and mix for 2.5 minutes to make the raw materials uniformly mixed; S2: According to the formula of the nuclear power hose assembly protective cap, take zinc oxide, stearic acid and antioxidant 445 and put them into the mixing component (2), and mix for 2-3 minutes; S3: According to the formula of the nuclear power hose assembly protective cap, take all the remaining raw materials and put them into the mixing component (2) in sequence, and mix for 2-3 minutes; S4: Repeat the lifting and pressing of the upper component (3) three times to raise the material temperature in the mixing component (2) to 125°; S5: Control the mixing component (2) to rotate 90° and discharge the mixed rubber material; The order of feeding the remaining raw materials in S3 is as follows: first add Pb3O4, cerium oxide, carbon black N660, carbon black N330, and white paraffin oil, mix them, and then add vulcanizing agent F40-SP2, HVA-2, sulfur, CBS and DM. The formula for the protective cap of the nuclear power plant hose assembly includes the following components by weight: EPDM13561 50~80 parts, SBR 10~20 parts, zinc oxide 1~5 parts, stearic acid 1.5~5 parts, Pb3O4 1~5 parts, antioxidant 445 0.5~1 parts, cerium oxide 5~15 parts, carbon black N660 50~90 parts, carbon black N330 20~30 parts, white paraffin oil 10~20 parts, vulcanizing agent F40-SP2 2.5~5 parts, HVA-2 1~3 parts, sulfur 0.3~1 parts, CBS 0.8~2 parts, DM 0.5~1 parts.