Quick wiring device for electric heater of voltage stabilizer

Abstract

The invention relates to the field of nuclear power equipment installation and maintenance, in particular to a quick wiring device for an electric heater of a voltage stabilizer. The device comprises a male plug and a female plug which can realize coupling; a jack is arranged at the front end of the male plug, at least one metal insertion rod is arranged in the jack, and a wiring end is arranged at the rear end of the metal insertion rod; an arc-preventing head is arranged at the head of the metal inserting rod; the end part of the female plug is provided with a plug-in part which can be inserted into the jack, the end part of the plug-in part is provided with a metal insertion tube, the metal insertion tube is internally provided with an elastic conductive sleeve, and the elastic conductive sleeve can be used for the insertion of the metal insertion rod and is in fit contact with the outer wall of the metal insertion rod; a plurality of arc-shaped elastic pieces protruding in the axis direction are distributed on the side wall of the elastic conductive sleeve in an annular array mode. A female plug shell is arranged outside the female plug, an insulating seat is arranged in the female plug shell, at least one second mounting hole is formed in the insulating seat, the metal insertion tube is mounted in the second mounting hole, and the insulating seat is made of a ceramic material. The device is high in safety efficiency, easy to replace and low in maintenance dependence.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear power plant installation and maintenance, in particular to a quick wiring device for electric heater of pressurizer. BACKGROUND

[0002] The wiring mode of the electric heater of the pressurizer of the nuclear power plant needs to meet the requirements of high reliability, safety and precise control. In the current wiring of the electric heater of the pressurizer of the pressurized water reactor nuclear power plant, the bolt crimping type wiring mode is generally adopted, such as the wiring of the core components such as the power bus and the circuit breaker, or the crimping terminal wiring mode in the auxiliary circuit.

[0003] The typical structure includes: the bolt crimping is to tightly press the wire and the conductor by the mechanical pressure of the bolt and the nut to form the electrical connection; the crimping terminal is to press the wire and the metal terminal by the special crimping tool to form the permanent electrical connection. These modes need special tools to complete the crimping, sealing and grounding processes step by step. Such wiring modes have obvious defects:

[0004] 1. The bolt crimping is a mechanical connection, the installation is complex, the bolt torque needs to be accurately controlled, and the contact surface needs to be treated (such as silver plating / tinning). The construction quality requirement is high, and 12 steps such as bolt fastening, sealing glue smearing and grounding wire installation need to be completed by multiple people, and the single wiring time is long;

[0005] 2. The long-term reliability depends on maintenance, and the bolt may be loose due to vibration or thermal expansion and contraction, which needs to be checked and tightened regularly.

[0006] 3. The maintenance process needs to repeatedly disassemble the bolt, which may increase the oxidation or pollution of the contact surface, increase the contact resistance, cause local heating, and reduce the reliability.

[0007] Although the crimping terminal does not need to be tightened by the bolt, it also needs to be crimped by the tool, and the installation speed is slightly faster than that of the bolt crimping. However, it is a one-time connection and cannot be disassembled after crimping. If it needs to be replaced, the wire needs to be cut and crimped again. Maintenance is difficult, the quality cannot be directly checked, and troubleshooting also needs to disconnect the connection. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a quick wiring device for electric heater of pressurizer, which is safe and efficient, easy to replace, and low in maintenance dependence.

[0009] The present application provides a quick wiring device for electric heater of pressurizer, which comprises a male plug and a female plug capable of coupling.

[0010] A socket is arranged at the front end of the male plug, and at least one metal plug rod is arranged in the socket, the rear end of the metal plug rod is provided with a wiring end for connecting the wire, and an anti-arc head is arranged at the head of the metal plug rod.

[0011] The end of the female plug is provided with a plug-in part capable of being inserted into the socket, and a metal plug-in pipe is arranged at the end of the plug-in part, and an elastic conductive sleeve is arranged in the metal plug-in pipe, the elastic conductive sleeve is capable of accommodating the metal plug-in rod and is in contact with the outer wall of the metal plug-in rod;

[0012] The side wall of the elastic conductive sleeve is provided with a plurality of arc-shaped elastic sheets which are arranged in an annular array and protrude towards the axis;

[0013] The outer part of the female plug is a female plug shell, an insulating seat is arranged in the female plug shell, at least one second mounting hole is arranged on the insulating seat, the metal plug-in pipe is mounted in the second mounting hole, and the insulating seat is made of ceramic material.

[0014] In a specific embodiment of the present application, a connecting nut is rotatably arranged at the end of the female plug, and an outer thread is arranged on the outer wall of the front end of the male plug, and the connecting nut is capable of being threadedly connected with the outer thread.

[0015] In a specific embodiment of the present application, a first positioning structure for radial positioning is arranged between the inner wall of the socket and the outer wall of the plug-in part, the first positioning structure comprises a positioning groove I arranged on the inner wall of the socket and a positioning protrusion I arranged on the outer wall of the plug-in part and corresponding to the positioning groove I, and the positioning groove I and the positioning protrusion I are both in strip shape and parallel to the male plug.

[0016] In a specific embodiment of the present application, the male plug comprises a male plug shell, one or more first mounting holes are arranged in the male plug shell, the axis of the first mounting hole is parallel to the axis of the male plug shell, an insulating sleeve I is arranged in the first mounting hole, the insulating sleeve I is supported by ceramic material, and the metal plug-in rod is mounted in the insulating sleeve I.

[0017] A transition sleeve is fixed to the side wall of the insulating sleeve I, and the end of the transition sleeve is in contact with the end of the first mounting hole.

[0018] A tail sleeve is arranged at the tail of the insulating sleeve I, and the end of the tail sleeve is in contact with the second annular protrusion of the side wall of the metal plug-in rod.

[0019] In a specific embodiment of the present application, the transition sleeve comprises a fixed part which is in cylindrical shape and is sleeved and fixed to the side wall of the insulating sleeve I, the fixed part extends outwardly and inclines towards the head end of the metal plug-in rod to form a first connecting part, the end of the first connecting part extends axially and inclines away from the fixed part to form a first limiting part, the first limiting part is in contact with the end of the first mounting hole, and an annular groove is arranged at the end of the first mounting hole to form a transition sleeve mounting groove, and the end of the transition sleeve is sleeved in the transition sleeve mounting groove.

[0020] The tail sleeve comprises a circular support part which is attached to the tail end surface of the insulating sleeve I, the outer side edge of the support part extends forward to form a sleeve joint part, the sleeve joint part is used for sleeving the tail part of the insulating sleeve I, the inner side edge of the support part extends to the direction opposite to the sleeve joint part to form a second limiting part, the second limiting part is sleeved on the outer side wall of the metal insertion rod, and the end part of the second limiting part can be in contact with the second annular protrusion of the side wall of the metal insertion rod.

[0021] The transition sleeve and the tail sleeve are made of ceramic material.

[0022] In an embodiment of the present application, the male insertion shell adopts a split structure, which comprises a male insertion shell I and a male insertion shell II with a circular cross section, the male insertion shell I and the male insertion shell II are coaxially arranged and fixedly connected at the end parts, the insertion port and the metal insertion rod are arranged in the male insertion shell I, and the rear end of the metal insertion rod is located in the male insertion II and used for wiring.

[0023] In an embodiment of the present application, an annular conductive sleeve mounting groove is arranged on the inner wall of the metal insertion tube, the elastic conductive sleeve is mounted in the conductive sleeve mounting groove,

[0024] The inner wall of the metal insertion tube is provided with an annular groove, the end part of the annular groove extends axially to the outside of the metal insertion tube, the elastic conductive sleeve can be axially sleeved into the annular groove, and a fixing ring is fixed at the end part of the annular groove, the fixing ring can axially fix the elastic conductive sleeve, and the fixing ring forms the conductive sleeve mounting groove.

[0025] In an embodiment of the present application, the length direction of the elastic sheet is inclined to the axis direction of the elastic conductive sleeve, and the included angle between the length direction of the elastic sheet and the axis of the elastic conductive sleeve is greater than or equal to 3 degrees and less than or equal to 10 degrees.

[0026] In an embodiment of the present application, the insulating seat comprises an insulating seat I and an insulating seat II, the insulating seat I and the insulating seat II are both cylindrical and coaxially arranged, the end parts of the two are connected to each other, an annular groove is arranged between the insulating seat I and the insulating seat II to form a limiting groove, the limiting groove is coaxial with the second mounting hole, and a third annular protrusion is arranged on the side wall of the metal insertion tube, the third annular protrusion is sleeved in the limiting groove.

[0027] In an embodiment of the present application, a second positioning structure is arranged between the outer wall of the insulating seat I and the insulating seat II and the inner wall of the female insertion shell, which is used for radial positioning during assembly, the second positioning structure comprises a positioning groove II arranged on the outer wall of the insulating seat I and the insulating seat II, and a positioning protrusion II arranged on the inner wall of the female insertion shell, the positioning protrusion II corresponds to the positioning groove II, and the length direction of the positioning protrusion II is parallel to the axis direction.

[0028] Compared with the prior art, the voltage stabilizer electric heater quick wiring device has the technical effects that:

[0029] (1) The problem of complex installation in the bolt crimping technology is solved. The quick connection structure of the male plug and the female plug is used, the voltage stabilizer electric heater is quickly wired under the premise of ensuring reliable connection, and the voltage stabilizer electric heater has the characteristics of quick wiring, high safety and high reliability.

[0030] (2) The problem of too many maintenance times, too high contact resistance caused by oxidation or pollution of the contact surface in the bolt crimping technology is solved. The elastic conductive sleeve is used to form multiple-point contact between the male plug and the female plug through elastic deformation of the elastic member. The design not only increases the contact area, but also ensures uniform distribution of contact pressure through elastic force, so that the contact resistance is reduced; and due to the large contact area, the heat dissipation effect is good.

[0031] (3) The problem of short service life of the crimping terminal is solved. The ceramic material is applied to the connector insulation, the performance limit of the traditional material is broken, and the stability and reliability in extreme environments such as high temperature, high pressure and radiation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structure schematic view of the voltage stabilizer electric heater quick wiring device of the present application;

[0033] Figure 2 It is a separated structure schematic view of the voltage stabilizer electric heater quick wiring device of the present application;

[0034] Figure 3 It is a sectional view of the voltage stabilizer electric heater quick wiring device of the present application;

[0035] Figure 4 It is a structure schematic view of the male plug of the voltage stabilizer electric heater quick wiring device of the present application;

[0036] Figure 5 It is a sectional view of the male plug of the voltage stabilizer electric heater quick wiring device of the present application;

[0037] Figure 6 It is Figure 5 the enlarged view of A part in the middle;

[0038] Figure 7 It is a structure schematic view of the transition sleeve of the voltage stabilizer electric heater quick wiring device of the present application;

[0039] Figure 8Structure diagram of the tail cover of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0040] Figure 9 For Figure 5 Enlarged view of the middle B part;

[0041] Figure 10 Explosion structure diagram of the male plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0042] Figure 11 Explosion structure diagram of the male plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0043] Figure 12 Sectional view of the male plug shell of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0044] Figure 13 Structure diagram of the female plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0045] Figure 14 Sectional view of the female plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0046] Figure 15 For Figure 14 Enlarged view of the middle C part;

[0047] Figure 16 For Figure 14 Enlarged view of the middle D part;

[0048] Figure 17 Explosion structure diagram of the female plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0049] Figure 18 Explosion structure diagram of the female plug of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0050] Figure 19 Structure diagram of the insulation seat I of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0051] Figure 20 Structure diagram of the insulation seat II of the quick wiring device of the electric heater of the voltage stabilizer of the present application;

[0052] Figure 21 Structure diagram of the elastic conductive sleeve of the quick wiring device of the electric heater of the voltage stabilizer of the present application.

[0053] In the figure, 1 - male plug; 2 - female plug; 11 - male plug shell I; 12 - insulating sleeve I; 13 - metal plug rod; 14 - arc prevention head; 15 - transition sleeve; 16 - tail sleeve; 17 - male plug shell II; 21 - female plug shell I; 22 - connecting nut; 23 - insulating seat I; 24 - insulating seat II; 25 - metal plug tube; 26 - elastic conductive sleeve; 27 - fixing ring; 28 - female shell plug body II; 29 - snap spring; 110 - first mounting hole; 1101 - transition sleeve mounting groove; 111 - shell body; 112 - cylindrical body; 1121 - positioning groove I; 131 - second annular protrusion; 151 - fixed part; 152 - first connecting part; 153 - first limiting part; 161 - support part; 162 - second limiting part; 163 - sleeving part; 250 - plug hole; 2501 - conductive sleeve mounting groove; 2502 - air hole; 251 - third annular protrusion; 252 - wiring hole; 211 - first annular protrusion; 230 - second mounting hole I; 231 - recess I; 231a - first limiting surface; 240 - second mounting hole II; 241 - recess II; 241a - second limiting surface; 261 - spring piece. DETAILED DESCRIPTION

[0054] In order to further understand the present application, the embodiments of the present application are described below in conjunction with the examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, but not for limiting the present application.

[0055] Reference Figures 1-21 The embodiments of the present application disclose a fast wiring device for an electric heater of a voltage stabilizer, which comprises a male plug 1 and a female plug 2 capable of being coupled, and the male plug 1 and the female plug 2 are both cylindrical structures; a plug opening is arranged at the front end of the male plug 1, and at least one metal plug rod 13 is arranged in the plug opening;

[0056] A plug-in part capable of being inserted into the plug opening is arranged at the end of the female plug 2, and a metal plug tube 25 is arranged at the end of the plug-in part, the metal plug tube 25 is capable of inserting the end of the metal plug rod 13, thereby realizing the electrical connection between the male plug 1 and the female plug 2; the metal plug rod 13 and the metal plug tube 25 are made of conductive metal, and preferably copper.

[0057] The connecting nut 22 is rotatably mounted at the end of the female plug 2, and the connecting nut 22 is overall cylindrical; at the same time, an external thread is arranged on the outer wall of the front end of the male plug 1, the connecting nut 22 is capable of being threadedly connected with the external thread, thereby realizing the locking and fixing between the male plug 1 and the female plug 2 when being coupled, and avoiding being separated by external force.

[0058] Compared to the traditional bolt crimping and crimping terminal methods in the electric heating system of the pressurizer of a nuclear power plant, this invention simplifies the installation steps, improves connection reliability, reduces maintenance difficulty and fault replacement costs through plug-in and locking structures, and achieves fast, convenient and safe electrical connection.

[0059] To improve airtightness, a sealing ring is provided between the outer wall of the connector and the inner wall of the socket, achieving internal sealing. This double sealing structure effectively isolates the connection from external environmental corrosion, ensuring the stability, reliability, and safety of the electrical connection. To achieve fast and accurate docking, a first positioning structure for radial positioning is provided between the inner wall of the socket and the outer wall of the connector. This first positioning structure includes a positioning groove I1121 formed on the inner wall of the socket and a positioning protrusion I provided on the outer wall of the connector and corresponding to the positioning groove I1121. Both the positioning groove I1121 and the positioning protrusion I are strip-shaped and parallel to the axis of the male connector 1 or the female connector 2. They have a simple structure, are easy to process, and have good positioning effect.

[0060] To achieve rapid and accurate docking, a first positioning structure for radial positioning is provided between the inner wall of the socket and the outer wall of the insertion part. The first positioning structure includes a positioning groove I1121 formed in the inner wall of the socket and a positioning protrusion I provided in the outer wall of the insertion part and corresponding to the positioning groove I1121. Both the positioning groove I1121 and the positioning protrusion I are strip-shaped and parallel to the axis of the male plug 1 or the female plug 2. The structure is simple, easy to process, and has a good positioning effect.

[0061] The contact resistance between the metal cannula 25 and the metal rod 13 is less than or equal to 5mΩ. Its low resistance and good conductivity can avoid heat generation, resulting in good performance and long service life. Hard gold is plated on the contact surface between the metal cannula 25 and the metal rod 13 to make the contact resistance less than or equal to 2mΩ, which can improve the overall conductivity.

[0062] To improve hardness and wear resistance, a nickel layer is plated on the contact surface between the metal cannula 25 and the metal rod 13, which can improve surface hardness, wear resistance and extend service life; and hard gold is plated on the nickel layer to improve conductivity.

[0063] The male connector 1 and female connector 2 in this invention have a temperature resistance of ≥200℃, enabling them to operate smoothly even in high-temperature environments, ensuring electrical safety and reliability; furthermore, the male and female connectors have a withstand voltage ≥20kV / mm and an irradiance resistance ≥10 kV / mm. 6 Gy ensures the stability and reliability of the electrical connection; the seals on male plug 1 and female plug 2 are made of phenyl silicone rubber, which has excellent sealing effect and long service life.

[0064] A sealing gasket is provided on the side wall of the female plug 2. This sealing gasket can contact the end of the male plug 1, thereby achieving elastic contact and sealing. This sealing gasket is made of high temperature resistant material, which is phenyl silicone rubber in this embodiment. It can ensure that it can maintain good sealing performance in high temperature environment. On the one hand, it can improve the overall sealing performance, and on the other hand, it can generate deformation and generate micro pressure on the male plug. Through the thread, it forms an axial tensile force on the connecting nut 22, which further enhances the stability of the connection and effectively prevents loosening caused by vibration.

[0065] A first annular protrusion 211 is provided on the side wall of the female plug 2. The first annular protrusion 211 is located inside the connecting nut 22 and at the root of the connecting nut 22. The sealing gasket is provided at the end of the first annular protrusion 211. The first annular protrusion 211 is used to install the sealing gasket to realize the end face limit and sealing between the male plug and the female plug. On the other hand, it can limit the connecting nut, which facilitates the overall assembly and connection, and reduces the manufacturing difficulty and cost.

[0066] The results of the common interpolation in this invention are explained below:

[0067] See Figures 3-12 The male connector 1 includes a male connector housing, which is cylindrical in shape. At least one first mounting hole 110 is provided inside the male connector housing; in this embodiment, there are two. The axis of the first mounting hole 110 is parallel to the axis of the male connector housing. An insulating sleeve I 12, which is cylindrical and supported by ceramic in this embodiment, is provided inside the first mounting hole 110. A metal plug 13 is installed inside the insulating sleeve I 12, achieving fixation and insulation of the metal plug 13 within the male connector housing. The head of the metal plug 13 extends into the socket, forming a metal plug for insertion into the metal tube and achieving electrical connection. The rear end of the metal plug 13 is provided with a terminal for connecting wires. This reduces the difficulty and cost of manufacturing and processing, improves manufacturing precision, and facilitates overall assembly, ensuring the stability of the connection and the reliability of the electrical connection.

[0068] In this embodiment, an anti-arc head 14 is provided at the head of the metal plug 13. The anti-arc head 14 is made of insulating material, which can prevent the generation of electric arc during the plugging process, especially the generation of electric arc discharge under high temperature and high pressure environment, thereby improving the safety of use and ensuring the safety of operation.

[0069] To facilitate processing and assembly, a transition sleeve 15 is fixed to the side wall of the insulating sleeve I 12. The end of the transition sleeve 15 contacts the end of the first mounting hole 110 to achieve a limiting installation of the insulating sleeve I 12. The transition sleeve 15 includes a fixing part 151, which is cylindrical and is fitted and fixed to the side wall of the insulating sleeve I 12. The fixing part 151 extends outward at one end toward the head of the metal insert 13 to form a first connecting part 152. The end of the first connecting part 152 extends axially in the direction away from the fixing part 151 to form a first limiting part 153, which is cylindrical. It can contact the end of the first mounting hole 110; at the same time, an annular groove is provided at the end of the first mounting hole 110 to form a transition sleeve mounting groove 1101. The end of the transition sleeve 15 is just fitted into the transition sleeve mounting groove 1101 to achieve limiting. The transition sleeve 15 is fixed to the male socket housing by welding. This can improve the assembly accuracy and facilitate subsequent welding and fixing, thereby improving the reliability and stability of the connection. The transition sleeve 15 adopts a connection structure with different diameters, which facilitates welding and fixing, avoids mutual interference during the welding process, improves the assembly accuracy, and facilitates welding and fixing connection with the insulating sleeve and metal plug.

[0070] A tail sleeve 16 is provided at the tail of the insulating sleeve I 12. The end of the tail sleeve 16 contacts the second annular protrusion 132 on the side wall of the metal plug 13, thereby achieving axial positioning of the metal plug 13. This ensures the precise positioning and installation of the insulating sleeve and the metal plug, prevents loosening due to vibration, and further improves the stability and safety of the connection. The tail sleeve 16 includes an annular support portion 161, which can fit against the tail end face of the insulating sleeve I 12. The outer edge of the support portion 161 extends forward to form a sleeve portion 163. The sleeve portion 163 is cylindrical and can accommodate the tail of the insulating sleeve I 12. The inner edge of the support portion 161, i.e., the edge of the central hole, faces the back. Extending towards the sleeve portion 163, a second limiting portion 162 is formed. This second limiting portion 162 is also cylindrical and fits perfectly over the metal insert rod 13. The end of the second limiting portion 162 can contact the second annular protrusion 131 on the side wall of the metal insert rod 13 to achieve axial positioning. With the above structure, assembly is convenient, and the metal insert rod 13 can be limited and fixed, ensuring the precise installation of the metal insert rod 13 and a tight fit between the tail sleeve and the metal insert rod. The insulating sleeve I 12, the transition sleeve 15, and the tail sleeve 16 are all made of ceramic material. Through metallization followed by vacuum brazing, they break through the performance limits of traditional materials and improve stability and reliability under extreme environments such as high temperature, high pressure, and irradiation.

[0071] To facilitate processing and assembly, the male connector housing adopts a split structure, comprising a circular cross-section male connector housing I11 and a circular male connector housing II17. Male connector housing I11 and male connector housing II17 are coaxially arranged and fixedly connected at their ends. The socket and metal probe 13 are located within male connector housing I11, while the rear end of the metal probe 13 is located within male connector II17 and used for wiring. This split structure reduces manufacturing costs and facilitates overall assembly. Male connector housing I11 and male connector housing II17 are made of stainless steel and Kovar alloy, respectively; that is, male connector housing I is made of either stainless steel or Kovar alloy, while male connector housing II is made of a different material, and the two are fixedly connected by vacuum brazing. This structure provides high structural strength, ensuring adaptability and durability in different environments and a long service life. The aforementioned male connector housing I11 includes a cylindrical housing body 111. The edge of the housing body 111 extends axially forward to form a cylindrical body 112. The interior of the cylindrical body 112 forms a connector. The inner wall of the cylindrical body is provided with one or more sealing ring mounting grooves for installing sealing rings. These grooves enable sealing between the connector and the insertion part, improving sealing performance and providing damping for a better insertion feel. They also have a buffering effect, reducing wear during insertion and removal and extending service life.

[0072] The structure of the female connector in this invention will be described below;

[0073] See Figures 13-21 The female plug 2 includes a female plug housing, an insulating seat is provided inside the female plug housing, and at least one second mounting hole is provided on the insulating seat, which is the same number as the first mounting hole 110 and corresponds one-to-one. The metal plug tube 25 is installed in the second mounting hole. It is easy to process, reduces the processing and manufacturing cost, improves the manufacturing precision, and facilitates assembly, especially the assembly of the metal plug tube 25. The insulating seat is made of ceramic material, which breaks through the performance limits of traditional materials and improves the stability and reliability under extreme environments such as high temperature, high pressure, and radiation.

[0074] The insulating base includes insulating base I 23 and insulating base II 24, both of which are cylindrical and coaxially arranged, with their ends connected to each other. An annular groove is provided between insulating base I 23 and insulating base II 24 to form a limiting groove, which is coaxial with the second mounting hole. Simultaneously, a third annular protrusion 251 is provided on the side wall of the metal insertion tube 25, which fits within the limiting groove, thereby achieving axial limiting. This enables rapid and precise positioning of the metal insertion tube 25, improving assembly efficiency and installation accuracy, and ensuring that it is used... To ensure stability and reliability during use, and to enable rapid and accurate assembly of the insulating bases, a second positioning structure is provided between the outer walls of insulating bases I23 and II24 and the inner wall of the female plug housing for radial positioning during assembly. The second positioning structure includes positioning grooves II on the outer walls of insulating bases I23 and II24, and positioning protrusions II on the inner wall of the female plug housing. The positioning protrusions II correspond to the positioning grooves II and are both strip-shaped structures with their length direction parallel to the axial direction. They are simple in structure and processing, occupy little space, and have high positioning accuracy.

[0075] Specifically, a second mounting hole I230 penetrates both ends of the insulating base I23. A recessed hole I231 is provided at the front end of the second mounting hole I230. This recessed hole I231 is coaxial with the second mounting hole I230 and slightly larger in size, forming a stepped hole. The stepped surface of the recessed hole I231 forms a first limiting surface 231a. A second mounting hole II240 penetrates both ends of the insulating base II24. The second mounting hole II240 is coaxial with the second mounting hole I230 and has the same diameter. A recessed hole II241 is provided at the rear end of the second mounting hole II240. II241 is coaxial with the second mounting hole II and is slightly larger than the concave hole II241, forming a stepped hole. The stepped surface of the concave hole II241 forms the second limiting surface 241a. The concave hole I231 is set opposite to the concave hole II241, forming a limiting area between the first limiting surface 231a and the second limiting surface 241a. It can limit the third annular protrusion 251 on the side wall of the metal tube 25 and fit the end of the third annular protrusion 251. It can quickly assemble the metal tube 25 into the housing, which is convenient and quick to assemble, and realizes reliable support and installation of the metal tube.

[0076] The metal cannula 25 includes a cylindrical metal rod. The front end of the metal rod has a hole forming a socket 250, which can accommodate the end of the metal rod for electrical connection. The rear end of the metal rod has a hole forming a wiring hole 252. Air holes 2502 penetrate the side walls of the socket 250 and the wiring hole 252. These air holes allow the socket at the end of the cannula to communicate with the rear end of the metal cannula through the air holes and gaps. This prevents air pressure from being generated in the socket during insertion and thus avoids increasing insertion resistance by pushing the metal rod. It also prevents incomplete insertion.

[0077] For ease of processing and assembly, the female plug housing includes a female plug housing I23 and a female plug housing II28 that are coaxially arranged and fixedly connected. An insulating seat is disposed inside the female plug housing I21, and a connecting nut 22 is rotatably installed outside the female plug housing I21 and is axially limited by a snap ring 29.

[0078] To improve insertion stability, an elastic conductive sleeve 26 is provided inside the metal insertion tube 25, see reference. Figure 21 The elastic conductive sleeve 26 accommodates the insertion of the metal rod 13 and makes close contact with the outer wall of the metal rod 13, thereby increasing the contact area, preventing incomplete connections, and ensuring uniform pressure distribution, thus guaranteeing the stability and reliability of the electrical connection. A socket 250, just large enough to accommodate the insertion of the metal rod 13, is provided at the front end of the metal tube 25, and the elastic conductive sleeve 26 is positioned at the open end of the socket 250. An annular conductive sleeve mounting groove 2501 is provided on the inner wall of the metal tube 25, and the elastic conductive sleeve 26 is installed within the groove. This groove allows for axial fixation of the elastic conductive sleeve 26 and ensures that its inner wall bulges inward to form an elastic contact. To facilitate processing and assembly of the elastic conductive sleeve, the metal tube 25... The inner wall is provided with an annular groove, the end of which extends axially to the outside of the metal cannula 25. The elastic conductive sleeve 26 can be axially fitted into the annular groove. At the same time, a fixing ring 27 is fixed at the end of the annular groove. The fixing ring can axially fix the elastic conductive sleeve, forming a conductive sleeve mounting groove 2501. The above structure facilitates the assembly of the elastic conductive sleeve 26. The elastic conductive sleeve 26 is cylindrical and made of conductive metal. Its inner wall has multiple arc-shaped spring pieces 261 that protrude in the axial direction in an annular array. The spring pieces 261 have a certain elasticity. The multiple spring piece structures achieve radial contact at multiple angles, with a large contact area, ensuring the stability and reliability of the electrical connection between the metal cannula and the metal rod. In this embodiment, the length direction of the spring piece 261 is inclined to the axial direction of the elastic conductive sleeve 26. The inclined arrangement of the spring piece can increase the contact area and extend the length of the spring piece, thereby increasing elasticity. Furthermore, the force generated by the deformation during contact is inclined to the axial direction, which facilitates the extension of the spring piece's service life. While ensuring the stability of the electrical connection, it extends the overall service life and improves the user experience. In this embodiment, the angle between the length direction of the spring piece 261 and the axial direction of the elastic conductive sleeve 26 is greater than or equal to 3 degrees and less than or equal to 10 degrees. This facilitates its processing and allows the spring piece to have optimal length and deformation.

[0079] The aforementioned elastic conductive sleeve 26 includes a cylindrical conductive sleeve body with a thin wall thickness to generate elastic deformation. The side wall of the conductive sleeve body has an inwardly concave arc structure. Multiple strip grooves are provided circumferentially on the side wall of the conductive sleeve body and divided into multiple elastic spring pieces 261. It is easy to process and has low manufacturing cost.

[0080] In this invention, a high-performance, high-reliability tool-free quick wiring function is achieved through a quick-connect structure of male connector 1 and female connector 2. The plug-and-play design of male connector 1 and female connector 2 can effectively improve wiring efficiency, making wiring operation simple, convenient, safe, and efficient. Disassembly is also easy, and maintenance costs are low, with minimal difficulty and high efficiency.

[0081] The plug assembly includes a socket assembly designed with an elastic conductive sleeve. Through the elastic deformation of the elastic element, multi-point contact is formed between the plug and the connector. This design not only increases the contact area but also ensures uniform contact pressure distribution through elastic force, thereby reducing contact resistance. Even under rapid wiring conditions, contact stability is maintained, ensuring the reliability of the device. Combined with hard gold-plated (0.5-1μm) oxygen-free copper sockets, the contact resistance is controlled to ≤2mΩ. The tail clamping mechanism, through an adjustable bracket, is compatible with both organic cable crimping and phenyl silicone rubber sealing modes. The entire assembly can withstand ambient temperatures below 200℃. The insulation component uses alumina ceramic insulators (with withstand voltage ≥20kV / mm, radiation resistance 10... 6 The Gy component is vacuum brazed to form a stable connection with the metal casing; the casing adopts a vacuum brazed composite structure of stainless steel and Kovar alloy (matching 7.2×10). -6 / ℃ thermal expansion coefficient); the contact arc suppression design uses the geometric fit between the protrusion of the plug and the recess of the plug hole, combined with the compression of phenyl silicone rubber, to reduce the arc energy by more than 70% and withstand high temperatures; the sealing system uses phenyl silicone rubber butt seals (-25℃~260℃ / compression rate 20-30%) to ensure long-term airtightness under vibration environment (≤1×10-9Pa·m). 3 / s), the tail clamping mechanism is welded to the inorganic cable in a metal welding mode to achieve a firm and stable connection, and to achieve fast wiring while meeting the required performance.

[0082] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0083] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick-connection device for a voltage regulator electric heater, characterized in that, include: It can achieve coupling between male and female connectors; The male plug has a socket at the front end and at least one metal prong inside the socket. The rear end of the metal prong has a terminal for connecting wires. The head of the metal prong has an anti-arc head. The female plug has a plug-in part at its end that can be inserted into the socket, and a metal tube at the end of the plug-in part. An elastic conductive sleeve is provided inside the metal tube. The elastic conductive sleeve can accommodate the insertion of the metal rod and is in close contact with the outer wall of the metal rod. The sidewall of the elastic conductive sleeve has multiple arc-shaped spring pieces that protrude towards the axis in a ring array. The outside of the female plug is a female plug shell, and an insulating seat is provided inside the female plug shell. The insulating seat has at least one second mounting hole, and the metal plug tube is installed in the second mounting hole. The insulating seat is made of ceramic material.

2. The quick-connection device for the voltage regulator electric heater according to claim 1, characterized in that, The female connector is rotatably fitted with a connecting nut at its end; meanwhile, the male connector has an external thread on its front end outer wall, and the connecting nut can be threadedly connected to the external thread.

3. The quick-connection device for the voltage regulator electric heater according to claim 1, characterized in that, A first positioning structure for radial positioning is provided between the inner wall of the socket and the outer wall of the insertion part; the first positioning structure includes a positioning groove I formed on the inner wall of the socket and a positioning protrusion I provided on the outer wall of the insertion part and corresponding to the positioning groove I; both the positioning groove I and the positioning protrusion I are strip-shaped and parallel to the male plug.

4. The quick-connection device for the voltage regulator electric heater according to claim 1, characterized in that, The male connector includes a male connector housing, which has one or more first mounting holes. The axis of the first mounting holes is parallel to the axis of the male connector housing. An insulating sleeve I is provided in the first mounting hole, and the insulating sleeve I is supported by ceramic. A metal insert is installed inside the insulating sleeve I. A transition sleeve is fixed to the side wall of insulating sleeve I, and the end of the transition sleeve contacts the end of the first mounting hole; The end of the insulating sleeve I is provided with a tail sleeve, and the end of the tail sleeve contacts the second annular protrusion on the side wall of the metal plug.

5. The quick-connection device for the voltage regulator electric heater according to claim 4, characterized in that, The transition sleeve includes a fixing part, which is cylindrical and is fitted and fixed to the side wall of the insulating sleeve I; the fixing part extends outward at one end toward the head of the metal plug to form a first connecting part, and the end of the first connecting part extends axially in the direction away from the fixing part to form a first limiting part, which contacts the end of the first mounting hole; at the same time, an annular groove is provided at the end of the first mounting hole to form a transition sleeve mounting groove, and the end of the transition sleeve is fitted into the transition sleeve mounting groove. The tail sleeve includes an annular support portion that fits against the tail end face of the insulating sleeve I. The outer edge of the support portion extends forward to form a sleeve portion. The sleeve portion accommodates the tail of the insulating sleeve I. The inner edge of the support portion extends in a direction away from the sleeve portion to form a second limiting portion. The second limiting portion is sleeved on the outside of the metal plug rod, and the end of the second limiting portion can contact the second annular protrusion on the side wall of the metal plug rod. Both the transition sleeve and the tail sleeve are made of ceramic material.

6. The quick-connection device for a voltage regulator electric heater according to claim 1, characterized in that, The male connector housing adopts a split structure, which includes a male connector housing I and a male connector housing II with a circular cross-section. The male connector housing I and the male connector housing II are coaxially arranged and their ends are fixedly connected. The socket and the metal plug are arranged in the male connector housing I, and the rear end of the metal plug is located in the male connector II and is used for wiring.

7. The quick-connection device for a voltage regulator electric heater according to claim 1, characterized in that, The inner wall of the metal cannula is provided with an annular conductive sleeve mounting groove, and the elastic conductive sleeve is installed in the conductive sleeve mounting groove. The inner wall of the metal cannula is provided with an annular groove, the end of which extends axially to the outside of the metal cannula. The elastic conductive sleeve can be axially fitted into the annular groove. At the same time, a fixing ring is fixed at the end of the annular groove, which can axially fix the elastic conductive sleeve, forming a conductive sleeve mounting groove.

8. The quick-connection device for the voltage regulator electric heater according to claim 1, characterized in that, The length direction of the spring is inclined to the axis of the elastic conductive sleeve, and the angle between the length direction of the spring and the axis of the elastic conductive sleeve is greater than or equal to 3 degrees and less than or equal to 10 degrees.

9. The quick-connection device for a voltage regulator electric heater according to claim 1, characterized in that, The insulating seat includes insulating seat I and insulating seat II. Both insulating seat I and insulating seat II are cylindrical and coaxially arranged, with their ends connected to each other. An annular groove is provided between insulating seat I and insulating seat II to form a limiting groove. The limiting groove is coaxial with the second mounting hole. At the same time, a third annular protrusion is provided on the side wall of the metal tube, and the third annular protrusion is sleeved in the limiting groove.

10. The quick-connection device for a voltage regulator electric heater according to claim 9, characterized in that, A second positioning structure is provided between the outer walls of the insulating base I and the insulating base II and the inner wall of the female plug housing for radial positioning during assembly. The second positioning structure includes a positioning groove II provided on the outer walls of the insulating base I and the insulating base II, and a positioning protrusion II provided on the inner wall of the female plug housing. The positioning protrusion II corresponds to the positioning groove II, and its length direction is parallel to the axial direction.

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