Deep sea technical verification system suitable for microminiature nuclear power generation device

Abstract

A deep sea technology verification system suitable for a microminiature nuclear energy power generation device comprises a pressure-resistant cylindrical shell, a spiral heat dissipation water pipe is wound on the outer circumferential surface of the pressure-resistant cylindrical shell, a plurality of T-shaped ring ribs are distributed on the outer circumferential surface of the pressure-resistant cylindrical shell at intervals, panels of the T-shaped ring ribs are welded to a protective frame, and a connecting tool is fixed to the middle of the top surface of the protective frame. The top face of the connecting tool is connected with an armored photoelectric composite cable through a bearing head, and the armored photoelectric composite cable is connected with a mother ship. One end of the pressure-resistant cylindrical shell is connected with a seal head side flange plate through a cylindrical shell side flange, a hemispherical seal head is arranged outside the seal head side flange plate, a guide rail is arranged at the other end of the pressure-resistant cylindrical shell, and meanwhile, the guide rail extends into the pressure-resistant cylindrical shell; a photoelectric separation box, a transformer and an electronic bin are further installed on the top face of the protection frame, a bin penetrating piece disc is installed on the hemispherical sealing head, a watertight connector is installed on the bin penetrating piece disc, and work is convenient and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of test systems and test methods, and in particular to a deep-sea technology verification system suitable for a micro-sized nuclear power generation device. Background Art

[0002] At present, in the context of advancing into the deep sea, deep-sea activities such as deep-sea exploration and deep-sea resource development, as well as deep-sea manned / unmanned equipment, will face urgent energy needs. Nuclear power generation systems have the characteristics of high energy density, self-controlled operation, high safety, and strong adaptability to harsh working conditions, making them the best choice for deep-sea energy supply.

[0003] So far, research in related fields generally focuses on deep-sea nuclear energy systems with larger power and size, which have at least the following disadvantages when facing deep-sea application scenarios:

[0004] (1) It places extremely stringent requirements on the design, processing and sealing technology of the pressure-resistant shell that provides the normal pressure environment for the nuclear power system;

[0005] (2) It weakens the flexibility, mobility, and timeliness of deep-sea deployment of nuclear power systems;

[0006] (3) The heavy weight of the entire system causes problems such as insufficient reserve buoyancy, which will limit the depth of use;

[0007] (4) The location can be easily tracked, which will pose a threat to the security of the target that receives energy supply.

[0008] Therefore, the research and development of deep-sea micro-nuclear energy systems has received much attention, among which power generation and efficiency are two important technical verification indicators. From the perspective of test cost and safety, the high-energy-density nuclear reactor module (which provides heat) is usually replaced with a non-nuclear power supply module during the deep-sea technical verification phase of the micro-nuclear power generation system. The power supply module must ensure sufficient power supply throughout the entire test cycle, and this part of the power often needs to be supplied from the mother ship to the test system.

[0009] The micro-nuclear power generation device test system used for deep-sea technology verification needs to solve the following key points:

[0010] (1) Ensure stable transmission of electrical energy and electrical signals from mother ship-test system-mother ship;

[0011] (2) A load-bearing cable with sufficient strength to connect the mother ship and the test system for deploying and recovering the entire test system;

[0012] (3) Design of pressure-bearing shell structure and sealing technology to provide normal pressure environment for the test system;

[0013] (4) Design of reliable connection between cables, wires and pressure hull and interface for penetration into the hull;

[0014] (5) Heat dissipation design and structural protection, etc. Currently, there is still a lack of complete and reliable deep-sea test systems suitable for micro-nuclear power generation devices for reference. Summary of the invention

[0015] The applicant has designed a system for deep-sea technology verification of micro-nuclear power generation devices, and provided a deep-sea technology verification system suitable for micro-nuclear power generation devices, which can serve as a special test system for technology verification of micro-nuclear power devices in deep-sea environments, and provide strong support for promoting the application of micro-nuclear power generation devices in the deep sea.

[0016] The technical solution adopted by the present invention is as follows:

[0017] A deep-sea technology verification system suitable for a micro-sized nuclear power generation device comprises a pressure-resistant cylindrical shell, wherein the outer circumferential surface of the pressure-resistant cylindrical shell is wound with a spiral heat dissipation water pipe, and the outer circumferential surface of the pressure-resistant cylindrical shell is spaced apart with a plurality of T-shaped ring ribs, the panels of the T-shaped ring ribs are welded to a protective frame, a connecting tool is fixed at the middle position of the top surface of the protective frame, the top surface of the connecting tool is connected to an armored photoelectric composite cable through a load-bearing head, and the armored photoelectric composite cable is connected to a mother ship; one end of the pressure-resistant cylindrical shell is connected to a head side flange through a column shell side flange, the outside of the head side flange is a hemispherical head, and the other end of the pressure-resistant cylindrical shell is provided with a guide rail, and the guide rail extends into the interior of the pressure-resistant cylindrical shell; an optoelectronic separation box, a transformer and an electronic compartment are also installed on the top surface of the protective frame, a cabin penetration disk is installed on the hemispherical head, and a watertight connector is installed on the cabin penetration disk, a part of the watertight connector is connected to the electronic compartment through cable optical fibers, and a part of the watertight connector is connected to the transformer through cables.

[0018] As a further improvement of the above technical solution:

[0019] The pipe opening of the spiral heat dissipation water pipe is provided with a cooling water pipe interface.

[0020] A sealing groove is provided on the column shell side flange, and a rubber sealing ring is arranged in the sealing groove.

[0021] The protection frame is a square frame structure.

[0022] The guide rails are arranged in parallel and spaced apart.

[0023] The cabin penetration plate is a forging with a skirt.

[0024] The cabin penetration plate is a thickened plate.

[0025] The beneficial effects of the present invention are as follows:

[0026] The present invention has a compact and reasonable structure and is easy to operate. Through the mutual cooperation between the armored optoelectronic composite cable, the load-bearing head, the connecting tooling, the optoelectronic separation box, the transformer, the electronic compartment, the watertight connector and other components, the technical verification of the micro-sized nuclear power device in the deep sea environment can be easily completed. While the system transmits electrical energy and optical signals with the mother ship, it is also necessary to deploy the deep-sea nuclear power test device to the specified water depth and complete the recovery after the test. The system provides a closed environment at normal pressure for the test device, and uses the pressure-resistant spiral heat dissipation water pipe wrapped around the outside of the pressure-resistant shell for cooling the test device. The protective frame provides structural protection for the external cooling water pipe. The test device of micro-sized nuclear power generation is deployed to the predetermined water depth through the system, and the mother ship supplies energy to the test device through the system. The real-time test data of the test device is returned to the mother ship through the system, providing strong support for promoting the application of micro-sized nuclear power generation devices in the deep sea.

[0027] The present invention provides a systematic solution for deep-sea technology verification of micro-sized nuclear power generation devices.

[0028] The present invention is aimed at the composition of a deep-sea technology verification system for a micro-nuclear power generation device (generally composed of a nuclear reactor, a turbine power generation system, a cooling system, etc.), and can realize the design verification of key technical indicators of a deep-sea (water depth of more than one kilometer) micro-nuclear power generation test device in a deep-sea service environment.

[0029] The present invention is based on modular design and system construction of some existing mature equipment, with high technical maturity and low risk.

[0030] The present invention provides a detailed design scheme for the functional requirements of power and information transmission, structural pressure bearing, deployment and recovery, heat dissipation and cooling in deep-sea technical verification of nuclear power generation test devices, and clarifies the design points of key components such as armored optoelectronic composite cables and pressure-resistant structures, which can provide a reference for deep-sea technical verification of micro-nuclear power generation devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention.

[0032] Figure 2 It is the front view of the present invention.

[0033] Figure 3 It is a side view of the present invention.

[0034] Figure 4 It is a top view of the present invention.

[0035] Among them: 1. Armored optoelectronic composite cable; 2. Load-bearing head; 3. Connecting tooling; 4. Optoelectronic separation box; 5. Transformer; 6. Electronic compartment; 7. Protective frame; 8. Spiral heat dissipation water pipe; 9. Pressure-resistant cylindrical shell; 10. Hemispherical head; 11. T-shaped ring rib; 12. Cabin penetration plate; 13. Guide rail; 14. Watertight connector; 15. Cable optical fiber; 16. Cable; 17. Head side flange; 18. Column shell side flange; 19. Cooling water pipe interface; 20. Sealing groove. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0037] like Figure 1-Figure 4 As shown, the present embodiment is applicable to a deep-sea technology verification system for a micro-sized nuclear power generation device, comprising a pressure-resistant cylindrical shell 9, the outer circumference of which is wound with a spiral heat dissipation water pipe 8, and the outer circumference of which is spaced apart with a plurality of T-shaped ring ribs 11, the panels of which are welded to a protective frame 7, a connecting fixture 3 is fixed at the middle position of the top surface of the protective frame 7, the top surface of the connecting fixture 3 is connected to an armored photoelectric composite cable 1 through a bearing head 2, and the armored photoelectric composite cable 1 is connected to a mother ship; one end of the pressure-resistant cylindrical shell 9 is connected to the mother ship through a cylindrical shell side flange 1 8 is connected to the head side flange 17, the outside of the head side flange 17 is a hemispherical head 10, and the other end of the pressure-resistant cylindrical shell 9 is provided with a guide rail 13, and the guide rail 13 extends into the interior of the pressure-resistant cylindrical shell 9; the top surface of the protective frame 7 is also installed with a photoelectric separation box 4, a transformer 5 and an electronic warehouse 6, a cabin penetration disk 12 is installed on the hemispherical head 10, and a watertight connector 14 is installed on the cabin penetration disk 12, a part of the watertight connector 14 is connected to the electronic warehouse 6 through a cable optical fiber 15, and a part of the watertight connector 14 is connected to the transformer 5 through a cable 16.

[0038] The pipe opening of the spiral heat dissipation water pipe 8 is provided with a cooling water pipe interface 19 .

[0039] A sealing groove 20 is formed on the column housing side flange 18 , and a rubber sealing ring is arranged in the sealing groove 20 .

[0040] The protection frame 7 is a square frame structure.

[0041] Two guide rails 13 are arranged in parallel and at intervals.

[0042] The piercing member plate 12 is a forging with a skirt.

[0043] The cabin penetration plate 12 is a thickened plate.

[0044] The specific structure and functions of the deep-sea technology verification system for micro-sized nuclear power generation devices described in the present invention are as follows:

[0045] It mainly includes armored optoelectronic composite cable 1, load-bearing head 2, connecting tooling 3, optoelectronic separation box 4, transformer 5, electronic warehouse 6, protective frame 7, spiral heat dissipation water pipe 8, pressure-resistant cylindrical shell 9, hemispherical head 10, T-shaped ring rib 11, cabin penetration plate 12, guide rail 13, watertight connector 14, cable optical fiber 15, cable 16, head side flange 17, and column shell side flange 18.

[0046] Among them, one end of the armored optoelectronic composite cable 1 is connected to the mother ship, and the other end is connected to the protective frame 7 through the load-bearing head 2 and the connecting tooling 3. The protective frame 7 is welded together with the panel of the T-shaped ring rib 11. The pressure-resistant cylindrical shell 9, the hemispherical head 10, the T-shaped ring rib 11, and the cabin penetration plate 12 together constitute a pressure-resistant shell, providing a normal pressure environment for the deep-sea micro-nuclear power generation test device.

[0047] The working principle of the present invention is as follows:

[0048] aConnection system:

[0049] The main functions of the connection system:

[0050] iTransmit electrical energy and optical signals with the mother ship;

[0051] ii is used to deploy the system to the specified water depth and complete the recovery after the test, so the connection system needs to bear the weight of the entire system.

[0052] The armored optoelectronic composite cable 1 integrates optical fiber and power transmission copper wire. The outer ring of the composite cable is wrapped with a metal wire of a certain thickness, so it can withstand a certain amount of tension. After the armored optoelectronic composite cable 1 passes through the load-bearing head 2, the composite cable is separated from the metal wire. After separation, all the tension of the armored cable is transmitted to the pressure-resistant shell through the connecting tooling 3. In order to avoid the stability and reliability of optoelectronic signal transmission, it is necessary to ensure that the composite cable is not subjected to tension in subsequent links. When selecting the armored optoelectronic composite cable 1, in addition to ensuring sufficient optical signal and current transmission channels, due to the violent swaying during the water-air process when the test equipment is recovered, the total gravity of the deep-sea technology verification system should not exceed 1 / 4 of the breaking force of the armored composite cable to prevent the cable from breaking.

[0053] To ensure the insulation of the line, the composite cable after the metal wire is separated needs to pass through the photoelectric separation box 4 to separate the cable optical fiber 15 from the cable 16. In view of the long transmission circuit of the deep-sea test, in order to reduce the loss of electric energy during the transmission process, high voltage is usually used. This application scenario usually needs to be boosted to 2kV~3kV transmission to transfer the energy provided by the electric energy simulating the nuclear reactor on the mother ship to the test system. Before entering the pressure shell, the high voltage needs to be converted into low voltage through the transformer 5. After the voltage is reduced, the line current will increase to about 200A. Considering the technical status that the maximum current that the existing watertight connector 14 can withstand does not exceed 50A, the current after the voltage is reduced by the transformer 5 will be divided into multiple paths through the watertight connector 14 set on the cabin plate 12 to enter the pressure shell. The optical fiber line needs to enter the electronic warehouse 6, and its internal core component is the photoelectric conversion board, which is used to convert optical signals and digital signals. After the optical fiber is output from the electronic warehouse 6, it is connected to the internal circuit of the shell through the watertight connector 14 to transmit the technical parameter information of the internal test phase of the shell back to the mother ship.

[0054] bStructural system:

[0055] The main functions of the structural system are:

[0056] iProvide normal pressure environment for deep-sea nuclear power test equipment;

[0057] ii. Provide structural protection for the spiral heat dissipation water pipe 8 used for cooling.

[0058] In the deep sea high pressure environment, the safety of the structural system, especially the pressure-resistant structural system, is extremely important to the entire test device. Taking into account the needs of space layout and pressure bearing, the pressure-resistant structure is recommended to adopt a pressure-resistant cylindrical shell 9 with a hemispherical head 10. The outer surface of the cylindrical shell is welded with T-shaped ring ribs 11 to increase the pressure bearing performance of the structure.

[0059] When designing this type of structure, strength and stability checks are required.

[0060] The recommended calibration method is: Calculate the pressure P c Calculate the pressure P c Equal to the pressure P corresponding to the maximum working water depth w Multiply by the safety factor K, the value of K is recommended to be in the range of 1.4 to 1.5, and the circumferential stress of the middle surface of the shell plate between the two ribs of the structure should not exceed 0.85σ p0.2 , the longitudinal stress of the shell plate at the root of the rib should not exceed 1.15σ p0.2 , the rib stress should not exceed 0.6σ p0.2 , the stress value of the mask in the ball head should not exceed 0.4σ p0.2 , local instability pressure of pressure-resistant structure P cr Should not be less than the calculated pressure P c, the overall instability pressure P cr 'Should not be less than the calculated pressure 1.2P c The flange 18 on the side of the column shell can be used as a sealing surface to open two sealing grooves 20 to arrange the rubber sealing ring. When the test depth is large, two sealing rings can be reasonably set. When designing the height and thickness of the flanges at both ends, it is necessary to ensure that the flanges do not produce large axial and radial deformations under the high pressure of the deep sea, and ensure the effectiveness of the "flange-seal-bolt" sealing method. The pressure-resistant structural material should be selected with a high specific strength.

[0061] The protective frame 7 described in the present invention is welded together with the panel of the T-shaped ring rib 11, and the connecting tooling 3 is welded or bolted together with the protective frame 7. The contact surface between the two should be large enough to ensure that the system does not produce large posture changes in the deep sea state to avoid affecting the normal operation of the device.

[0062] The penetration plate 12 of the present invention is essentially a thickened plate, which is welded to the hemispherical head 10. It is recommended that the penetration plate 12 is a forging with a skirt, so that butt welding can be used when welding with the hemispherical head 10 to avoid strength problems under high pressure. At the same time, a number of threaded holes are set on the penetration plate 12 for connecting with the watertight connector 14, and a sealing ring is embedded in the watertight connector 14 to ensure watertightness.

[0063] The test device described in the present invention can be pushed into the shell as a whole through the guide rail 13 set in the pressure-resistant cylindrical shell 9. The welding of the guide rail 13 and the shell can adopt discontinuous welding to ensure that no obvious thermal deformation is generated on the shell surface during welding, thereby reducing the impact on structural safety.

[0064] A considerable portion of the heat input to the turbine power generation system of the present invention cannot be fully utilized, so the heat dissipation problem needs to be considered for the entire test device, and the heat exchange with seawater can be achieved by using a spiral heat dissipation water pipe 8 placed outside the pressure-resistant cylindrical shell 9. The spiral cooling water pipe is connected by bolts to the cooling water pipe interface 19 welded to the pressure-resistant shell.

[0065] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A deep-sea technology verification system for micro-sized nuclear power generation devices, characterized by: The invention comprises a pressure-resistant cylindrical shell (9), wherein a spiral heat dissipation water pipe (8) is wound around the outer circumference of the pressure-resistant cylindrical shell (9), and a plurality of T-shaped ring ribs (11) are distributed at intervals on the outer circumference of the pressure-resistant cylindrical shell (9), the panel of the T-shaped ring rib (11) is welded to a protective frame (7), a connecting tool (3) is fixed at the middle position of the top surface of the protective frame (7), the top surface of the connecting tool (3) is connected to an armored photoelectric composite cable (1) through a bearing head (2), and the armored photoelectric composite cable (1) is connected to a mother ship; one end of the pressure-resistant cylindrical shell (9) is connected to a head side flange (17) through a cylindrical shell side flange (18), and the head side flange The outside of the disk (17) is a hemispherical head (10), and the other end of the pressure-resistant cylindrical shell (9) is provided with a guide rail (13), and the guide rail (13) extends into the interior of the pressure-resistant cylindrical shell (9); a photoelectric separation box (4), a transformer (5) and an electronic compartment (6) are also installed on the top surface of the protective frame (7), a cabin-penetrating disk (12) is installed on the hemispherical head (10), and a watertight connector (14) is installed on the cabin-penetrating disk (12), a part of the watertight connector (14) is connected to the electronic compartment (6) through a cable optical fiber (15), and a part of the watertight connector (14) is connected to the transformer (5) through a cable (16).

2. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: The pipe opening of the spiral heat dissipation water pipe (8) is provided with a cooling water pipe interface (19).

3. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: A sealing groove (20) is formed on the column housing side flange (18), and a rubber sealing ring is arranged in the sealing groove (20).

4. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: The protection frame (7) is in the form of a square frame structure.

5. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: The guide rails (13) are provided with two parallel and spaced apart arrangements.

6. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: The cabin penetration plate (12) is a forging with a skirt.

7. The deep-sea technology verification system for micro-sized nuclear power generation devices as claimed in claim 1, characterized in that: The cabin penetration plate (12) is a thickened plate.

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