An automatic short-circuit switch for full-sea-depth underwater equipment and a manufacturing method thereof

Abstract

The invention discloses a marine engineering and underwater robot technology, aiming to provide an automatic short-circuit switch for full-sea-depth underwater equipment and a manufacturing method thereof. The key points of the technical solution are that the short-circuit switch body comprises: a shell, which is fixedly connected to the equipment and is used to ensure the insulation performance between the equipment and the grounding loop under normal conditions; a conductor, which is arranged in the shell from the front end and is used to contact seawater to achieve the effect of conductivity and deep water pressure resistance; an electric pin, which is arranged in the shell from the rear end and is threadedly connected with the conductor to form an internally encapsulated single-core electrical path for automatically triggering a short-circuit signal; when in use, the seawater contacts the titanium alloy conductor to achieve the purpose of short-circuiting the electric pin; the invention has a simple and reasonable structure, is easy to manufacture, is easy to operate, avoids the defects in the prior art, and is suitable for popularization and implementation; the invention is applicable to the field of marine engineering and underwater robot technology.

Description

Technical Field

[0001] The present invention relates to marine engineering and underwater robot technology, and more specifically, to an automatic short-circuit switch for full-sea-depth underwater equipment and a manufacturing method thereof. Background Art

[0002] The full-sea-depth underwater equipment automatic short-circuit switch is a switch device designed for deep-sea environments. It is used to automatically cut off the circuit under certain conditions to protect the equipment from electrical faults such as short circuits. This switch needs to be able to work stably under extreme water pressure, temperature, salinity and other conditions, and have high reliability and durability.

[0003] The current underwater short-circuit switches have the disadvantages of poor corrosion resistance, poor waterproof performance, poor reliability, etc., which bring inconvenience to underwater operations; therefore, there is a need for an automatic short-circuit switch for full-sea-depth underwater equipment with good corrosion resistance, good waterproof performance and high reliability. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide an automatic short-circuit switch for full-sea-depth underwater equipment and a manufacturing method thereof.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an automatic short-circuit switch for full-sea-depth underwater equipment, comprising a short-circuit switch body, the short-circuit switch body comprising:

[0006] The housing is fixedly connected to the equipment and is used to ensure the insulation performance between the equipment and the grounding circuit under normal conditions;

[0007] The conductor is arranged in the shell from the first end thereof to contact the seawater so as to achieve the effects of conducting electricity and resisting deep water pressure;

[0008] The electric pin is inserted from the rear end of the shell and is arranged in the shell and is threadedly connected with the conductor to form an internally encapsulated single-core electrical path for automatically triggering a short-circuit signal.

[0009] The present invention is further configured as follows: a plurality of disassembly sealing grooves for fixedly connecting with the equipment are arranged on the outside of the shell; and the shell is made of non-metallic PEEK material.

[0010] The present invention is further configured as follows: a sealing structure for preventing moisture from penetrating into the internal structure is arranged between the conductor and the shell, the sealing structure includes a plurality of annular sealing grooves opened on the circumference of the conductor, and a sealing ring is arranged in the annular sealing groove; the conductor is made of titanium alloy material.

[0011] The present invention is further configured as follows: the electrical pin is made of brass material, and the electrical pin and the conductor are threadedly mounted to facilitate disassembly and assembly and to improve conductive efficiency and signal sensitivity at the same time; the structure of the electrical pin can select different diameters and insulation thicknesses according to actual needs to adapt to different high voltage and high current environments.

[0012] The present invention is further configured such that: the conductor and the electrical plug are both T-shaped, so as to ensure that the conductor and the housing, and the electrical plug and the housing form an end face sealing effect after assembly.

[0013] The present invention is further configured as follows: the mechanical life of the short-circuit switch body is not less than 500 times, the operating temperature range is -30°C to +80°C, the current carrying capacity is 10A, the dielectric withstand voltage is 2500Vdc, the hydrostatic pressure is 127MPa, and the insulation resistance is ≥1000MΩ under normal conditions.

[0014] A method for manufacturing an automatic short-circuit switch for full-sea-depth underwater equipment, characterized in that it comprises the following steps:

[0015] S1. Material selection and preparation: Select non-metallic PEEK as the material for manufacturing the shell, select titanium alloy that meets the requirements of corrosion resistance and high strength as the material for manufacturing the conductor, select brass as the material for manufacturing the electrical pin, and prepare the sealing ring;

[0016] S2. Design and modeling: Use CAD software to perform three-dimensional modeling of the shell, conductor and electrical pins according to requirements to ensure that they can meet the requirements for underwater use;

[0017] S3. Processing of various components: The housing, conductor and electrical pins are formed by casting or machining, and surface treatment is performed to enhance their performance;

[0018] S4. Assembly: Install the sealing ring into the annular sealing groove of the conductor, then insert the tail end of the conductor into the shell from the head end of the shell until the head end of the conductor contacts the head end of the shell, then insert the tail end of the electrical plug from the tail end of the shell and rotate and tighten with the threaded hole at the tail end of the conductor until the head end of the electrical plug contacts the tail end of the shell, so that the short-circuit switch body is sealed to ensure waterproof performance;

[0019] S5. Electrical performance test: Conduct a comprehensive electrical performance test on the assembled short-circuit switch body to ensure its reliability under extreme conditions;

[0020] S6. Withstand voltage test: Perform a withstand voltage test on the assembled short-circuit switch body. The steps are as follows:

[0021] S61. Ensure that the test environment meets safety standards and clean the test area, and prepare necessary test equipment, such as a withstand voltage tester, simulated seawater solution, etc.;

[0022] S62, fixing the short-circuit switch body on the bracket and cleaning the contact surface of the short-circuit switch body;

[0023] S63, setting the applied hydrostatic pressure to 127 MPa and setting the appropriate holding time to 24 h;

[0024] S64, immersing the short-circuit switch body in a simulated seawater solution to ensure complete coverage, and then slowly applying a predetermined hydrostatic pressure and monitoring the pressure change to ensure that the target pressure is maintained;

[0025] S65. During the entire process of applying pressure, observe whether there is leakage and record the test data and any problems found;

[0026] S66. After the test, after gradually reducing the applied pressure, carefully remove the short-circuit switch body and check the appearance and contact points in combination with the recorded results to ensure that they meet the requirements;

[0027] S7. Final inspection and packaging: After the withstand voltage test, the qualified short-circuit switch body will undergo a final appearance inspection and functional test, and will be packaged after passing the test.

[0028] The present invention is further configured as follows: in said S5, the electrical performance test includes but is not limited to a current carrying capacity test, a dielectric withstand voltage test and an insulation resistance test.

[0029] The beneficial effects of the present invention are:

[0030] 1. Compared with the prior art, the automatic short-circuit switch for underwater equipment at full sea depth of the present invention adopts high-performance non-metallic PEEK material as the shell, which has excellent corrosion resistance. The chemical stability of PEEK material in the marine environment enables it to effectively resist the erosion of various corrosive substances in seawater, ensuring that the equipment is not easy to age or fail during long-term use; in addition, the conductor part is made of titanium alloy, which itself has good corrosion resistance and can maintain good conductivity and mechanical strength in high-salinity seawater environment. Therefore, the corrosion resistance of the short-circuit switch not only prolongs its service life, but also ensures its reliability and safety in harsh environments, making it an ideal choice for deep-sea operations; the short-circuit loop is changed by structural design to realize the grounding short-circuit of a single-core electrical path through the seawater environment, so that the product has reliable full-sea depth resistance and realizes the automatic short-circuit signal when entering the water.

[0031] 2. The full-sea-depth underwater equipment automatic short-circuit switch of the present invention ensures absolute isolation between internal components and the external environment through a precisely designed sealing structure. The annular sealing groove and sealing ring arranged between the conductor and the shell can effectively prevent seawater from penetrating into the interior, avoiding short circuits or failures caused by moisture in electrical components. At the same time, the threaded connection design of the electrical pin and the conductor not only enhances the stability of the contact, but also ensures a good sealing effect, showing its excellent waterproof performance. This feature greatly improves the reliability of the equipment during deep-sea operations, ensuring that it can work normally under extreme conditions and avoiding equipment damage caused by moisture intrusion.

[0032] 3. In the present invention, a specially designed shell and conductor material are used, which have extremely high resistance to deep water pressure. This design enables the short-circuit switch to work stably in a deep-sea environment, reducing the safety hazards caused by equipment failure, thereby greatly improving the reliability of the equipment; the electrical pin and the conductor are connected by threaded connection. This structure is easy to disassemble and assemble, and significantly improves the conductive efficiency and signal sensitivity. At the same time, the material of the electrical pin is brass, which has excellent conductivity and wear resistance.

[0033] 4. The present invention has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of the full-sea-depth underwater automatic short-circuit switch of the present invention.

[0035] Figure 2 The cross-sectional structural diagram of the full-sea-depth underwater automatic short-circuit switch of the present invention.

[0036] Figure 1-2 Figure numerals: 1, housing; 2, conductor; 3, electrical pin; 4, disassembly sealing groove; 5, annular sealing groove. DETAILED DESCRIPTION

[0037] Reference Figure 1-2 The embodiment of the full-sea-depth underwater equipment automatic short-circuit switch and the manufacturing method thereof of the present invention is further described.

[0038] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0039] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0040] Figure 1 to Figure 2 The full-sea-depth underwater equipment automatic short-circuit switch shown includes a short-circuit switch body, which includes:

[0041] Shell 1, fixedly connected to the device and used to ensure insulation performance between the device and the grounding circuit under normal conditions;

[0042] The conductor 2 is provided in the shell 1 from the front end thereof and is used to contact the seawater so as to achieve the effects of conducting electricity and resisting deep water pressure;

[0043] The electrical pin 3 is inserted from the rear end of the housing 1 and is disposed in the housing 1 and is threadedly connected with the conductor 2 to form an internally encapsulated single-core electrical path for automatically triggering a short-circuit signal;

[0044] The outer portion of the housing 1 is provided with a plurality of disassembly sealing grooves 4 for fixedly connecting with the device; the housing 1 is made of non-metallic PEEK material;

[0045] A sealing structure is provided between the conductor 2 and the housing 1 to prevent moisture from penetrating into the internal structure. The sealing structure includes a plurality of annular sealing grooves 5 provided on the circumference of the conductor 2. A sealing ring is provided in the annular sealing grooves 5. The conductor 2 is made of titanium alloy material.

[0046] The full-sea-depth underwater automatic short-circuit switch of the present invention ensures absolute isolation between internal components and the external environment through a precisely designed sealing structure. The annular sealing groove 5 and the sealing ring arranged between the conductor 2 and the shell 1 can effectively prevent seawater from penetrating into the interior, thereby avoiding short circuits or failures caused by moisture in the electrical components. At the same time, the threaded connection design of the electrical pin 3 and the conductor 2 not only enhances the stability of the contact, but also ensures a good sealing effect, showing its excellent waterproof performance, and preventing the electrical pin 3 from being directly exposed to water to ensure the overall performance of the product. This feature greatly improves the reliability of the equipment during deep-sea operations, ensuring that it can work normally under extreme conditions and avoiding equipment damage caused by moisture intrusion.

[0047] Compared with the prior art, the full-sea-depth underwater equipment automatic short-circuit switch of the present invention adopts high-performance non-metallic PEEK material as the shell 1, which has excellent corrosion resistance. The chemical stability of PEEK material in the marine environment enables it to effectively resist the erosion of various corrosive substances in seawater, ensuring that the equipment is not easy to age or fail during long-term use; in addition, the conductor 2 is made of titanium alloy, which itself has good corrosion resistance and can maintain good conductivity and mechanical strength in high-salinity seawater environments. Therefore, the corrosion resistance of the short-circuit switch not only extends its service life, but also ensures its reliability and safety in harsh environments, making it an ideal choice for deep-sea operations; the short-circuit loop is changed by structural design to achieve a single-core electrical path to ground short-circuit through the seawater environment, so that the product has reliable full-sea-depth resistance and can automatically trigger a short-circuit signal when entering the water.

[0048] The electrical plug 3 is made of brass material, and the electrical plug 3 and the conductor 2 are screwed together for easy assembly and disassembly and to improve the conductivity and signal sensitivity. The structure of the electrical plug 3 can be selected with different diameters and insulation thicknesses according to actual needs to adapt to different high voltage and high current environments.

[0049] In the present invention, specially designed shell 1 and conductor 2 materials are used, which have extremely high resistance to deep water pressure. This design enables the short-circuit switch to work stably in a deep-sea environment, reducing the safety hazards caused by equipment failure, thereby greatly improving the reliability of the equipment; the electrical pin 3 and the conductor 2 are connected by threaded connection. This structure is easy to disassemble and assemble, and significantly improves the conductive efficiency and signal sensitivity. At the same time, the material of the electrical pin 3 is brass, which has excellent conductivity and wear resistance.

[0050] The conductor 2 and the electrical plug 3 are both T-shaped, so as to ensure that the conductor 2 and the housing 1, and the electrical plug 3 and the housing 1 form an end-face sealing effect after assembly;

[0051] The short-circuit switch of the present invention is designed with full consideration of functionality and practicality, and uses a T-shaped conductor 2 and electrical pin 3 structure, so that an effective end face sealing effect can be formed after assembly. This design not only improves the ease of assembly, but also enhances the structural integrity of the overall device and reduces potential failure points.

[0052] The mechanical life of the short-circuit switch body is not less than 500 times, the operating temperature range is -30°C to +80°C, the current carrying capacity is 10A, the dielectric withstand voltage is 2500Vdc, the hydrostatic pressure is 127MPa, and the insulation resistance is ≥1000MΩ under normal conditions;

[0053] A method for manufacturing an automatic short-circuit switch for full-sea-depth underwater equipment, characterized in that it comprises the following steps:

[0054] S1. Material selection and preparation: non-metallic PEEK is selected as the material for manufacturing the housing 1, a titanium alloy that meets the requirements of corrosion resistance and high strength is selected as the material for manufacturing the conductor 2, brass is selected as the material for manufacturing the electrical pin 3, and a sealing ring is prepared;

[0055] S2. Design and modeling: Use CAD software to perform three-dimensional modeling of the housing 1, conductor 2 and electrical pin 3 as required to ensure that they can meet the requirements for underwater use;

[0056] S3. Processing of various components: the housing 1, the conductor 2 and the electrical pin 3 are formed by casting or machining, and surface treatment is performed to enhance their performance;

[0057] S4, assembly: install the sealing ring into the annular sealing groove 5 of the conductor 2, then insert the tail end of the conductor 2 into the housing 1 from the head end of the housing 1 until the head end of the conductor 2 contacts the head end of the housing 1, then insert the tail end of the electrical plug 3 from the tail end of the housing 1 and rotate and tighten it with the threaded hole at the tail end of the conductor 2 until the head end of the electrical plug 3 contacts the tail end of the housing 1, so that the short-circuit switch body is sealed to ensure waterproof performance;

[0058] The manufacturing method of the short-circuit switch is carefully designed, which greatly simplifies the production and assembly process. By using CAD software for three-dimensional modeling, not only the processing accuracy of the components is improved, but also the foundation for subsequent assembly is laid. The processing of each component adopts casting or processing to ensure the strength and durability of the material. During the assembly process, the design of the sealing ring and the annular sealing groove 5 can ensure the waterproof performance, thereby reducing the risk of water leakage caused by improper assembly. This efficient manufacturing and assembly process not only improves production efficiency, but also reduces production costs, bringing higher economic benefits to the enterprise.

[0059] S5. Electrical performance test: Conduct a comprehensive electrical performance test on the assembled short-circuit switch body to ensure its reliability under extreme conditions;

[0060] S6. Withstand voltage test: Perform a withstand voltage test on the assembled short-circuit switch body. The steps are as follows:

[0061] S61. Ensure that the test environment meets safety standards and clean the test area, and prepare necessary test equipment, such as a withstand voltage tester, simulated seawater solution, etc.;

[0062] S62, fixing the short-circuit switch body on the bracket and cleaning the contact surface of the short-circuit switch body;

[0063] S63, setting the applied hydrostatic pressure to 127 MPa and setting the appropriate holding time to 24 h;

[0064] S64, immersing the short-circuit switch body in a simulated seawater solution to ensure complete coverage, and then slowly applying a predetermined hydrostatic pressure and monitoring the pressure change to ensure that the target pressure is maintained;

[0065] S65. During the entire process of applying pressure, observe whether there is leakage and record the test data and any problems found;

[0066] S66. After the test, after gradually reducing the applied pressure, carefully remove the short-circuit switch body and check the appearance and contact points in combination with the recorded results to ensure that they meet the requirements;

[0067] S7. Final inspection and packaging: After the withstand voltage test, the qualified short-circuit switch body is subjected to final appearance inspection and functional test, and then packaged after passing the test;

[0068] In S5, the electrical performance test includes but is not limited to a current carrying capacity test, a dielectric withstand voltage test, and an insulation resistance test.

[0069] During the production process of the short-circuit switch, strict electrical performance tests and withstand voltage tests are implemented. These tests include current carrying capacity test, dielectric withstand voltage test and insulation resistance test, etc., to ensure that each product can work reliably under extreme conditions. The withstand voltage test steps are detailed and standardized, including strict requirements for the test environment and data recording, to ensure the authenticity and reliability of the test results. When in use, the seawater contacts the titanium alloy conductor 2, so as to achieve the purpose of short-circuiting the electrical pin 3; the present invention has a simple and reasonable structure, is easy to manufacture, is easy to operate, avoids the defects of the prior art, and is suitable for promotion and implementation.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing an automatic short-circuit switch for full-sea-depth underwater equipment, characterized in that: The short-circuit switch body includes: A housing (1) is fixedly connected to the device and is used to ensure insulation performance between the device and the grounding circuit under normal conditions; The conductor (2) is arranged inside the shell (1) from the front end thereof and is used to contact the seawater so as to achieve the effects of conducting electricity and resisting deep water pressure; An electrical plug (3) is inserted from the rear end of the housing (1) and disposed in the housing (1) and is threadedly connected with the conductor (2) to form an internally encapsulated single-core electrical path for automatically triggering a short-circuit signal; A sealing structure for preventing moisture from penetrating into the internal structure is provided between the conductor (2) and the housing (1), the sealing structure comprising a plurality of annular sealing grooves (5) provided on the circumference of the conductor (2), and a sealing ring is provided in the annular sealing groove (5); the conductor (2) is made of a titanium alloy material; The manufacturing method thereof comprises the following steps: S1. Material selection and preparation: non-metallic PEEK is selected as the material for manufacturing the housing (1), a titanium alloy that meets the requirements of corrosion resistance and high strength is selected as the material for manufacturing the conductor (2), brass is selected as the material for manufacturing the electrical pin (3), and a sealing ring is prepared; S2. Design and modeling: Use CAD software to perform three-dimensional modeling of the housing (1), conductor (2) and electrical pin (3) as required to ensure that they can meet the requirements for underwater use; S3. Processing of various components: the housing (1), the conductor (2) and the electrical plug (3) are formed by casting or machining, and surface treatment is performed to enhance their performance; S4. Assembly: Install the sealing ring into the annular sealing groove (5) of the conductor (2), then insert the tail end of the conductor (2) into the housing (1) from the head end of the housing (1) until the head end of the conductor (2) contacts the head end of the housing (1), then insert the tail end of the electrical plug (3) from the tail end of the housing (1) and rotate and tighten it with the threaded hole at the tail end of the conductor (2) until the head end of the electrical plug (3) contacts the tail end of the housing (1), so that the short-circuit switch body is sealed to ensure waterproof performance; S5. Electrical performance test: Conduct a comprehensive electrical performance test on the assembled short-circuit switch body to ensure its reliability under extreme conditions; S6. Withstand voltage test: Perform a withstand voltage test on the assembled short-circuit switch body. The steps are as follows: S61. Ensure that the test environment meets safety standards and clean the test area, and prepare necessary test equipment: pressure tester and simulated seawater solution; S62, fixing the short-circuit switch body on the bracket and cleaning the contact surface of the short-circuit switch body; S63, setting the applied hydrostatic pressure to 127 MPa and setting the appropriate holding time to 24 h; S64, immersing the short-circuit switch body in a simulated seawater solution to ensure complete coverage, and then slowly applying a predetermined hydrostatic pressure and monitoring the pressure change to ensure that the target pressure is maintained; S65. During the entire process of applying pressure, observe whether there is leakage and record the test data and any problems found; S66. After the test, after gradually reducing the applied pressure, carefully remove the short-circuit switch body and check the appearance and contact points in combination with the recorded results to ensure that they meet the requirements; S7. Final inspection and packaging: After the withstand voltage test, the qualified short-circuit switch body will undergo a final appearance inspection and functional test, and will be packaged after passing the test.

2. The method for manufacturing a full-sea-depth underwater equipment automatic short-circuit switch according to claim 1, characterized in that: The outside of the shell (1) is provided with a plurality of disassembly sealing grooves (4) for fixed connection with the equipment; the shell (1) is made of non-metallic PEEK material.

3. The method for manufacturing a full-sea-depth underwater equipment automatic short-circuit switch according to claim 1, characterized in that: The electrical plug pin (3) is made of brass material, and the electrical plug pin (3) and the conductor (2) are threadedly mounted, which is convenient for assembly and disassembly and can simultaneously improve the conduction efficiency and signal sensitivity; the structure of the electrical plug pin (3) can be selected with different diameters and insulation thicknesses according to actual needs to adapt to different high voltage and high current environments.

4. The method for manufacturing a full-sea-depth underwater equipment automatic short-circuit switch according to claim 1, characterized in that: The conductor (2) and the electrical plug pin (3) are both T-shaped, so as to ensure that after assembly, the conductor (2) and the housing (1), and the electrical plug pin (3) and the housing (1) form an end-face sealing effect.

5. The method for manufacturing a full-sea-depth underwater equipment automatic short-circuit switch according to claim 1, characterized in that: The mechanical life of the short-circuit switch body is not less than 500 times, the operating temperature range is -30°C to +80°C, the current carrying capacity is 10A, the dielectric withstand voltage is 2500Vdc, the hydrostatic pressure is 127MPa, and the insulation resistance is ≥1000MΩ under normal conditions.

6. The method for manufacturing a full-sea-depth underwater equipment automatic short-circuit switch according to claim 1, characterized in that: In S5, the electrical performance test includes but is not limited to a current carrying capacity test, a dielectric withstand voltage test, and an insulation resistance test.

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