Socket assembly for integrated small reactor voltage stabilizer electric heater

Abstract

The invention belongs to the technical field of connectors, and particularly relates to a socket assembly for an integrated small reactor voltage stabilizer electric heater, which comprises a socket and a heating rod, and is characterized in that the rear end of a socket contact piece in the socket is connected with an electrode column corresponding to the front end of the heating rod in the electric heater through a wire; a sleeve is fixedly sleeved between the rear end of the socket shell and the outer wall of the front end of the heating rod and used for wrapping the wire and the electrode column. According to the invention, the contact element in the socket in the assembly is reliably and electrically conducted with the heating rod, and the socket adopts a quick plugging structure for the matched plug, so that quick decoupling between the plug and the socket can be instantly realized; the quick decoupling and coupling of the plug and the socket realize the quick decoupling and coupling of the cable connected with the tail part of the plug and the electric heater connected with the tail part of the socket.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a socket assembly for an integrated small-scale stack stabilizer electric heater. Background Art

[0002] Currently, integrated small reactors are a hot topic in the field of nuclear energy development. Among them, small pressurized water reactors are the most mature and engineering-feasible reactor type, and are also key projects that are being promoted for research and development and deployment at home and abroad.

[0003] The main function of the pressurizer electric heater (hereinafter referred to as "electric heater") in a small pressurized water reactor is to heat the reactor coolant in the pressurizer under rated conditions and variable load operation to maintain it at a temperature that meets the operating pressure, thereby controlling and regulating the pressure fluctuation of the reactor coolant system. The electric heaters are independent units, and there are about dozens of them.

[0004] On the reactor pressure vessel side, the technology currently used is to achieve fixed connection between the pressurizer electric heater and the cable by connecting the copper nose and bolts (see CN213936718U nuclear power pressurizer electric heater wiring assembly for details), and the other side of the cable is connected to the penetration piece in the reactor containment.

[0005] The location of the integrated small reactor pressurizer electric heater is exposed to a certain dose of gamma rays and neutron rays. The construction area is small, the normal long-term working temperature is about 260°C, and the maximum temperature during shutdown maintenance is 50°C.

[0006] During the periodic shutdown and refueling of the integrated small reactor, the electric heating rod of the voltage stabilizer electric heater or the cable needs to be replaced regularly, and the voltage stabilizer electric heater and the cable need to be decoupled and coupled.

[0007] Considering that the electric heating rods of the pressurizer electric heater or the cables need to be replaced regularly during the periodic shutdown and refueling of the integrated small reactor, the pressurizer electric heater and the cable need to be decoupled and coupled. In view of the presence of a certain dose of gamma rays and neutron rays at the location of the integrated small reactor pressurizer electric heater, the construction area is small, and the maximum temperature during the shutdown maintenance period is 50°C. In the current technology, the integrated small reactor pressurizer electric heater and the cable are connected by wiring copper nose and bolts, which requires a large operating space during the decoupling or coupling process, is complex to operate, requires a long construction period, and the operator is exposed to harmful radiation environment for a long time, which is harmful to the health of the operator. In addition, a certain number of tools and fasteners are required to decouple or couple the wiring copper nose and bolts, which will cause the risk of redundant materials to the reactor. Summary of the invention

[0008] In order to solve the problem that the above-mentioned integrated small-scale reactor pressurizer electric heater has inadequate connection with the cable, the present invention provides a socket assembly for the integrated small-scale reactor pressurizer electric heater.

[0009] The purpose of the present invention is to achieve the following technical solution. According to the present invention, a socket assembly for an integrated small-scale reactor pressurizer electric heater includes a socket and a heating rod, the rear end of the socket contact in the socket is connected to the electrode column corresponding to the front end of the heating rod in the electric heater through a wire, and a sleeve is fixed between the rear end of the socket shell and the outer wall of the front end of the heating rod, and the sleeve is used to wrap the wire and the electrode column.

[0010] Compared with the prior art, the present invention is beneficial in that:

[0011] The present invention ensures reliable electrical conduction between the contact piece in the socket and the heating rod in the assembly, and the socket adopts a quick plug-in and pull-out structure for the matching plug, which can instantly realize the rapid decoupling of the plug and the socket; the rapid decoupling and coupling of the plug and the socket, that is, the rapid decoupling and coupling of the cable connected to the tail of the plug and the electric heater connected to the tail of the socket are realized.

[0012] Furthermore, the socket contact is a pin contact or a socket contact, and the rear end of the socket contact is a wire crimping barrel structure for crimping with a wire. When the socket contact is a socket contact, a socket sheath is sleeved on the outer side of the front end of the socket contact.

[0013] Compared with the prior art, the present invention is beneficial in that:

[0014] The socket cover allows the socket contact to maintain high elasticity, ensuring that the pin and the socket are firmly plugged in.

[0015] Furthermore, a short insulator and an insulating pressure plate 1 are arranged in the socket shell of the socket, and a stopping structure cooperating with the short insulator to stop forward is arranged on the inner wall of the socket shell. The socket contact is inserted in the short insulator, and the short insulator cooperates with the socket contact to stop forward. The insulating pressure plate 1 is inserted at the rear side of the short insulator and cooperates with the socket contact and the short insulator to stop backward. A threaded retaining ring cooperating with the insulating pressure plate 1 to stop backward is arranged at the rear end of the socket shell.

[0016] Furthermore, a boss is provided on the front end surface of the insulating pressure plate 1, and a step hole is provided at the rear end of the short insulator. The socket contact is inserted into the step hole of the short insulator, and the step in the step hole blocks the ring platform of the outer circumference of the pin contact forward, and the boss on the insulating pressure plate 1 is inserted into the step hole of the short insulator and blocks the ring platform of the pin contact 14 backward.

[0017] Furthermore, a locking steel ball capable of radial sliding is embedded in the front end wall of the socket shell of the socket, and when the head seats are plugged in, the locking steel ball is stuck in the steel ball locking groove of the corresponding plug.

[0018] Compared with the prior art, the invention is advantageous in that the plug and the socket can be quickly plugged in and out by locking with a steel ball.

[0019] Furthermore, a front end of the socket housing of the socket is provided with an identification groove for mating with a positioning pin on a corresponding plug.

[0020] Compared with the prior art, the present invention is advantageous in that only when the identification groove and the positioning pin are correctly matched can the plug and the socket be correctly plugged in, thereby avoiding damage to the plug or the socket when incorrectly plugged in.

[0021] Furthermore, the inner cavity of the socket shell of the socket is embedded with a corrugated grounding spring for contacting with the plug shell of the plug after the header is plugged in.

[0022] Compared with the prior art, the present invention is advantageous in that after the header is plugged in, the plug housing contacts the corrugated grounding spring to ensure reliable conductivity between the socket housing and the plug housing.

[0023] Furthermore, the other end of the wire connected to the socket contact is crimped to the crimping threaded sleeve, and the other end of the crimping threaded sleeve is threadedly connected to the external thread on the electrode column.

[0024] Furthermore, an insulating pressing plate I for rearwardly stopping cooperation with the socket contact piece is provided in the socket, and the maximum outer circle size of the crimping threaded sleeve is smaller than the inner hole size of the insulating pressing plate I.

[0025] Compared with the prior art, the advantage of the present invention lies in that: when assembling the socket assembly, the crimping threaded sleeve can be crimped with the wire (such as a soft transfer wire) first, the crimping threaded sleeve and the soft transfer wire can be passed through the insulating pressure plate I, and then the insulating pressure plate I is matched with the short insulator. During the crimping assembly, there is no need to install the insulating pressure plate I first, the crimping can be done in a smaller space, and batch crimping processing can be done.

[0026] Furthermore, a plug matching the socket is connected to the socket via a quick plug-in structure.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of a socket assembly embodiment 1 for an integrated small-scale stack pressurizer electric heater of the present invention when plugged into a corresponding plug;

[0029] Figure 2 It is a structural schematic diagram of a heating rod of an electric heater in the prior art;

[0030] Figure 3 The present invention is a socket assembly embodiment 1 for an integrated small-scale reactor pressurizer electric heater and Figure 2 A schematic diagram of the structure of the connection interface of the heating rod shown in;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of the plug and the connection interface between the plug and the cable shown in;

[0032] Figure 5 for Figure 2 The socket shown is Figure 4 A schematic diagram of the structure of the quick coupling of the plug shown;

[0033] Figure 6 for Figure 2 The socket shown is Figure 4 Schematic diagram of the structure of the quick decoupling of the plug shown.

[0034] [Reference Signs]

[0035] 1- socket;

[0036] 11-socket housing; 1101-identification slot;

[0037] 12- short insulator;

[0038] 13-insulating pressing plate I;

[0039] 14-pin contact;

[0040] 15-threaded retaining ring;

[0041] 16-Transfer soft wire;

[0042] 17- crimping threaded sleeve;

[0043] 18-locking steel ball;

[0044] 19- corrugated ground spring;

[0045] 2- Plug;

[0046] 21-plug housing; 2101-positioning pin; 2102-ball locking groove; 2103-connecting ear;

[0047] 22-connecting nut;

[0048] 23-High insulator;

[0049] 24-Insulation plate II;

[0050] 25-fixing nut;

[0051] 26-jack contact; 261-jack sheath;

[0052] 27-tail clamp pressure plate;

[0053] 28-stainless steel screws and spring washers;

[0054] 29-tail clip sleeve; 291-sleeve boss;

[0055] 210-seal ring;

[0056] 211-spring;

[0057] 212-wire rope;

[0058] 213-crimp sleeve;

[0059] 3-heating rod; 31-external thread; 32-electrode column;

[0060] 4- sleeve;

[0061] 5-cable; 51-flexible corrugated tube. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0064] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0065] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0066] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0067] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0069] The features and performance of the socket assembly of the present application suitable for an integrated small stack pressurizer electric heater are further described in detail below in conjunction with the embodiments.

[0070] Embodiment 1 of a socket assembly for an integrated small-scale reactor pressurizer electric heater according to the present invention is as follows: Figures 1 to 6 As shown, hereinafter referred to as an assembly, the end of each component of the assembly is close to the plug-in end as the front end (head), and the end away from the plug-in end is the rear end (tail).

[0071] Under the current technical level, the structure of the heating rod 3 in the electric heater is as follows: Figure 2 The front end of the heating rod 3 is a sealed brazing structure, and the front end surface is provided with two electrode columns 32, and the end outer wall of the electrode column 32 is provided with an external thread 31.

[0072] The present invention connects the socket 1 in the assembly with the heating rod 3, and the outer wall of the head of the heating rod 3 is sealed and welded with the rear end interface of the socket 1 in the assembly through the sleeve 4. The electrode column 32 and the pin contact 14 of the socket 1 are reliably electrically connected, so that the socket is integrated on the voltage stabilizer electric heater. The pin contact 14 is made of high temperature resistant material.

[0073] The socket contact 26 in the plug 2 is reliably electrically connected to the cable 5, and the cable clamp component of the plug 2 clamps and fixes the cable 5, so that the plug is integrated on the cable 5. The socket contact 26 is made of high temperature resistant material, and the cable 5 is a power supply high temperature cable.

[0074] The plug 2 and the socket 1 of the present invention are connected in a steel ball locking and straight plug-in connection. The plug housing 21 is provided with a locking groove 2102 and a positioning pin 2101, and the socket housing 21 is riveted with a locking steel ball 18 and an identification groove 1101, which can realize the rapid coupling between the head seats in an instant through a direct push form; the plug housing 21 is provided with a flexible unlocking wire rope 212, and pulling the wire rope backwards can instantly realize the rapid decoupling of the plug and the socket. The rapid decoupling and coupling of the plug 2 and the socket 1 realizes the rapid decoupling and coupling of the cable 5 connected to the tail of the plug and the electric heater connected to the tail of the socket.

[0075] The socket 1 includes a socket housing component, a pin insulator component, a high temperature resistant transfer soft wire 16, and a crimping threaded sleeve 17. The transfer soft wire 16 is made of a high temperature resistant material. The socket housing component includes a socket housing 11, a corrugated grounding spring 19, a locking steel ball 18, and a threaded retaining ring 15; the pin insulator component includes an insulating pressure plate 113, a short insulator 12, and a pin contact 14.

[0076] The front end of the socket housing 11 is provided with an identification groove 1101, which cooperates with the positioning pin 2101 on the plug housing 21 to achieve circumferential positioning. When the header is inserted, the positioning pin 2101 first engages with the identification groove 1101, so that the header is matched and inserted in the correct orientation.

[0077] There are 6 or more steel ball riveting holes distributed circumferentially in the wall of the front end of the socket housing 11, which can be reliably riveted with the locking steel ball 18. The locking steel ball 18 slides radially in the steel ball riveting hole but does not fall out. After the head seat is inserted, the locking steel ball 18 slides into the steel ball locking groove 2102 of the plug housing 21 and cooperates with the connecting nut 22 on the plug housing 21 to achieve locking.

[0078] The inner wall of the front end inner cavity of the socket housing 11 is provided with a groove for nesting and installing the corrugated grounding spring 19. After the head seat is plugged in, the plug housing 21 contacts the corrugated grounding spring 19 to ensure reliable conductivity requirements between the socket housing 11 and the plug housing 21.

[0079] The inner cavity at the rear end of the socket housing 11 is provided with a stepped hole or the wall of the inner cavity at the rear end is provided with an internal key, and the pin insulator component is inserted into the inner cavity at the rear end of the socket housing 11 from the rear side, and the step of the stepped hole or the internal key stops the front end face of the pin insulator component for assembly and positioning of the pin insulator component. The tail of the socket housing 11 is provided with an internal thread, which is threadedly connected to the threaded retaining ring 15 and then stops at the rear end face of the pin insulator component, realizing the connection and assembly of the threaded retaining ring 15 and the positioning of the pin insulator component.

[0080] A welding interface is provided on the outer circumference of the rear end of the socket housing 11, and the welding interface is connected to the sleeve 4 and welded to the sleeve 4, so as to fix the sleeve 4 on the socket housing 11, and the other end of the sleeve 4 is sleeved and welded to the outer wall of the front end of the heating rod.

[0081] The pin contact 14 is positioned by snapping in the pin insulator component; the pin contact 14 is made of a special copper alloy material with good heat resistance and conductivity. The front end of the pin contact 14 is used to cooperate with the socket contact 26 of the plug 2, and the rear end is a wire barrel structure.

[0082] The outer circumferences of the insulating plate 113 and the short insulator 12 are respectively provided with steps or keyways. After the short insulator 12 and the insulating plate 113 are sequentially inserted into the inner cavity at the rear end of the socket housing 11, they are stopped and matched with the steps or internal keys in the inner cavity of the socket housing 11 to achieve axial and radial positioning. Alternatively, the outer walls of the short insulator 12 and the insulating plate 11 may not be provided with steps or keyways. The short insulator 12 and the insulating plate 113 are sequentially inserted into the socket housing 11. The socket housing 11 is provided with steps. The front end face of the short insulator 12 abuts against the steps in the socket housing 11 to stop the short insulator 12 and the insulating plate 113 forward. The threaded retaining ring 15 abuts against the rear end face of the insulating plate 113 to limit and fix the pin insulator component in the socket housing 11.

[0083] A boss is provided on the front end face of the insulating pressure plate I13, and a step hole is provided on the rear end of the short insulator 12. The pin contact 14 is inserted into the hole of the short insulator 12, and the annular platform on the outer circumference of the pin contact 14 is pressed against the step of the step hole. Then the insulating pressure plate I13 is sleeved on the wire pressing barrel structure of the pin contact 14, so that the boss on the insulating pressure plate I13 is inserted into the step hole of the short insulator 12 and pressed against the annular platform of the pin contact 14, so as to realize the positioning and matching of the pin contact 14 and fix the pin contact 14 in the pin insulator component.

[0084] The insulating plate 113 and the short insulator 12 are respectively printed with laser marking numbers at the corresponding positions of the holes where the pin contacts 14 are inserted, so as to define and identify them during wiring. In this embodiment, two pin contacts 14 are provided in total to facilitate connection with the corresponding two electrode columns 31, and "1" and "2" are marked on the outer end surfaces of the insulating plate 113 and the short insulator 12 at the corresponding positions of the pin contacts 14.

[0085] The transfer soft wire 16 is a high temperature resistant ceramic fiber insulated wire or quartz fiber wire, or a high temperature resistant soft wire or hard wire made of other materials, one end of which is inserted and crimped into the wire barrel structure of the pin contact 14, and the other end is inserted and crimped into one end of the crimping thread sleeve 17. The crimping thread sleeve 17 is made of a special copper alloy with good comprehensive performance of heat resistance and conductivity, one end of which can be crimped and connected with the high temperature resistant transfer soft wire 16, and the rear end thereof has an internal thread for threading with the external thread 31 at the end of the electrode column 32, thereby realizing the electrical connection between the pin contact 14 and the electrode column 32.

[0086] In summary, the connection interface between the socket 1 and the heating rod 3 includes an electrical transmission interface and a mechanical connection interface. The structure of the electrical transmission interface is summarized as follows:

[0087] The crimping barrel structure at the rear end of the pin contact 13 can be crimped and terminated with the high temperature resistant transfer soft wire 16, the crimping barrel structure at the front end of the crimping threaded sleeve 17 is crimped with the high temperature resistant transfer soft wire 16, and the internal thread at the rear end is screwed and connected with the external thread of the two electrode columns 31 of the electric heater heating rod and spot welded to prevent loosening. In order to facilitate crimping assembly within a short distance, the maximum outer circle size of the crimping threaded sleeve 17 is smaller than the inner hole size of the insulating pressure plate I13. The crimping threaded sleeve 17 can be crimped with the transfer soft wire 16 first, and the crimping threaded sleeve 17 and the transfer soft wire 16 are passed through the insulating pressure plate I13, and then the insulating pressure plate I13 is matched with the short insulator 12. When crimping and assembling, it is not necessary to set the insulating pressure plate I13 first, and crimping can be performed in a small space, and batch crimping processing can be performed. The pin contact 14 can rotate in a circle in the pin insulator component. When the crimping threaded sleeve 17 is threadedly connected to the electrode column 32, the crimping threaded sleeve 17, the adapter soft wire 16 and the pin contact 14 are already connected. The pin contact 14 can be rotated to make the crimping threaded sleeve 17 threadedly connected to the electrode column 32.

[0088] The structure of the mechanical connection interface is summarized as follows:

[0089] The inner diameter of the sleeve 4 matches the outer diameter of the welding interface at the tail of the socket 1 and the heating rod 3 of the voltage stabilizer electric heater. The sleeve 4 can be pre-sheathed on the front end outer wall of the heating rod 3. After the electrical transmission interface is connected, the sleeve 4 is pushed and transferred between the socket 1 and the heating rod 3 of the voltage stabilizer electric heater. The front end of the sleeve 4 is sealed and welded to the welding interface at the tail of the socket, and the rear end is sealed and welded to the outer wall of the heating rod 3 of the voltage stabilizer electric heater, realizing the connection of the mechanical interface, so that the socket 1, the sleeve 4, and the heating rod 3 form a closed space for accommodating the conductive connection part of the socket contact and the heating rod 3.

[0090] The assembly process of the socket 1 is as follows, but not limited to: crimp the pin contact 14, the crimping threaded sleeve 17 and the adapter soft wire 16, insert the pin contact 14 into the short insulator 12, sequentially sleeve the insulating pressure plate I on the crimping threaded sleeve 17, the adapter soft wire 16 and finally sleeve the wire crimping barrel structure of the pin contact 14, limit and fix the pin contact 14 in the pin insulator component, insert the pin contact 14 and the pin insulator component into the plug housing 11, and thread the threaded retaining ring 15 at the tail end of the socket housing 11, sleeve the sleeve 4 on the front end of the heating rod 3, thread the crimping threaded sleeve 17 and the electrode column 32, push and sleeve the sleeve 4 on the front end of the socket housing 11 and the heating rod 3 at the same time, and seal and weld the sleeve 4 on the front end of the socket housing 11 and the heating rod 3. In order to facilitate the installation and removal of the threaded retaining ring 15, a tail hexagonal structure is integrally formed at the rear end of the threaded retaining ring 15, and can be quickly installed or removed with the help of loading and unloading tools.

[0091] The plug 2 plugged into the socket 1 of the present invention comprises a plug housing component, a jack insulator component, and a cable clamp component. The plug housing component comprises a plug housing 21, a connecting nut 22, a spring 211, a fixing nut 25, a steel wire 212, and a sealing ring 210; the jack insulator component comprises an insulating pressure plate II 24, a high insulator 23, and a jack contact 26; and the cable clamp component comprises a tail clamp sleeve 29, a tail clamp pressure plate 27, a stainless steel screw, and a spring washer 28. The jack contact 26 is made of a high temperature resistant material, and the screw and the spring washer 28 may also be made of other high temperature resistant materials.

[0092] A positioning pin 2101 is provided on the front end outer wall of the plug housing 21 to quickly match with the identification groove 1101 of the socket housing 11 and perform circumferential positioning.

[0093] The front end surface of the plug housing 21 is pressed and contacted with the corrugated grounding spring 19 in the socket housing 11 to ensure reliable conductivity between the header housings.

[0094] A high temperature resistant sealing ring 210 is embedded in the outer wall of the front circumference of the plug housing. After the head seat is plugged in, the plug housing 21 and the socket housing 11 are sealed by the sealing ring 210. The inner cavity matching structure of the plug and the socket meets the IP protection requirements. The sealing ring 210 is made of phenyl silicone rubber that can withstand 300° and radiation.

[0095] The outer wall of the plug housing 21 is provided with a steel ball locking groove 2102 extending in the circumferential direction, which can achieve fast and reliable locking with the locking steel ball 18 of the socket housing 11 .

[0096] A high temperature resistant spring 211 is sleeved on the plug housing 21, and a connecting nut 22 is sleeved on the outer side of the spring 211. One end of the spring 211 away from the plug-in end abuts against a step on the outer wall of the plug housing 21 to stop the spring 211 backwards, and the other end abuts against a step on the inner wall of the connecting nut 22. Under the elastic force of the spring 211, the connecting nut 22 has a tendency to move forward. To prevent the connecting nut 22 from falling out of the plug housing 21, a fixing nut 25 is provided at the rear end of the connecting nut 22. In this embodiment, the internal thread of the fixing nut 25 is threadedly connected with the external thread of the connecting nut 22, and the step on the inner wall of the rear end of the fixing nut 25 stops forward on the step on the outer wall of the plug housing 21, which can prevent the connecting nut 22 from falling out of the plug housing 21 forwards. By screwing the connecting nut 22 and the fixing nut 25 together, the spring 211 can be put into a compressed state. After the fixing nut 25 and the connecting nut 22 are tightened into place, spot welding is performed at the intersection of the threads to prevent loosening, and the fixing nut 25 and the connecting nut 22 are fixed. At this time, the spring 211 is in a pre-tightened state.

[0097] A steel wire rope 212 is crimped on the connecting nut 22. When no force is applied to the steel wire rope 212, the front end of the connecting nut 22 covers the steel ball locking groove 2102. After the head seat is inserted and locked, the connecting nut 22 blocks the locking steel ball 18 from moving radially outward. The locking steel ball 18 is nested in the steel ball locking groove 2102, so that the head seat is locked. When the steel wire rope 212 is pulled backward, the connecting nut 22 releases the blocking of the locking steel ball 18, so that the locking steel ball 18 of the socket 1 can be separated from the steel ball locking groove 2102 of the plug 2.

[0098] In this embodiment, two connecting ears 2103 are symmetrically provided on the outer wall of the connecting nut 22, and the two ends of the wire rope 212 pass through the through holes of the corresponding connecting ears 2103 respectively. The end of the wire rope 212 and the part of the wire rope 212 that does not pass through the connecting ears 2103 are placed side by side and a crimping sleeve 213 is provided. After the crimping sleeve 213 is crimped, it can withstand a pulling force of 1000N without loosening.

[0099] The inner cavity at the front end of the plug housing 21 is provided with a stepped hole or an inner key for assembling and positioning the jack insulator component. The jack insulator component is inserted into the inner cavity of the plug housing 21 from the rear side, and the jack insulator component is stopped forward by the stepped hole or the inner single key.

[0100] The tail of the plug housing 21 is provided with an internal thread for connecting and assembling the cable clamp component. The front end of the tail clamp sleeve 29 of the cable clamp component is provided with an external thread, which is connected to the internal thread of the tail of the plug housing 21. After the threaded connection is in place, spot welding is used at the junction to prevent loosening. The rear end of the tail clamp sleeve 29 is provided with a tail clamp pressure plate 27, and the rear end surface of the tail clamp sleeve 29 is symmetrically provided with a sleeve boss 291. A tail clamp pressure plate 27 is provided on each side of the sleeve boss 291. The two tail clamp pressure plates 27 press the cable 5, and then the tail clamp pressure plate 27 is fixed to the sleeve boss 291 using stainless steel screws and spring washers 28, thereby fixing the cable 5 on the tail clamp sleeve 29.

[0101] The cable clamp component mainly clamps and fixes the cable 5, and protects the contact crimping in a vibration and earthquake-resistant environment. The tail clamp sleeve 29 is connected to the internal thread at the rear end of the plug housing 21 through the external thread at the front end, thereby achieving axial stop positioning of the jack insulator component.

[0102] The outer wall of the rear end of the plug housing 21 is provided with a welding interface, and a flexible bellows 51 is sleeved on the outer side of the cable 5. The welding structure of the plug housing 21 and the end of the flexible bellows 51 adapted to the size of the welding interface are sealed and welded.

[0103] The jack contact 26 is positioned in the jack insulator part by snapping. The jack contact 26 is made of a special copper alloy with good comprehensive performance of heat resistance and conductivity. The outer wall of the plug-in end of the jack contact 26 is provided with a jack sheath 261 to keep the jack contact high elastic force. The front end of the jack contact 26 cooperates with the pin contact of the socket 1, and the rear end is a wire barrel structure, and the wire core in the cable 5 is crimped in the wire barrel structure.

[0104] The outer walls of the insulating pressure plate II 24 and the tall insulator 23 are respectively provided with steps or keyways to achieve axial and radial positioning with the steps or internal single keys in the inner cavity of the socket housing 21, or the front end face of the tall insulator 23 is pressed against the step in the inner cavity of the socket housing 21, the insulating pressure plate II 24 is pressed against the rear end face of the tall insulator 23, and the tail clip sleeve 29 is pressed against the rear end face of the insulating pressure plate II24, so as to achieve the positioning of the jack insulator component.

[0105] A boss is provided on the front end face of the insulating pressure plate II 24, and a step hole is provided in the inner cavity at the rear end of the high insulator 23. The socket contact 26 is inserted into the corresponding hole of the high insulator 23, and the annular platform on the outer wall of the socket contact 26 is axially stopped forward by the step of the high insulator 23. Then, the insulating pressure plate II 24 is sleeved on the wire pressing barrel structure of the socket contact body 26, and the annular platform on the outer wall of the socket contact 26 is axially stopped backward by the boss of the high insulator II24, so as to realize the positioning and matching of the socket insulator component and the socket contact 26.

[0106] The end surfaces of the through holes of the insulating plate II 24 and the high insulator 23 for inserting the jack contact 26 are printed with laser marking numbers for easy identification during wiring. In this embodiment, two jack contacts 26 need to be inserted into the jack insulator component, and the insulating plate II 24 and the high insulator 23 are both provided with two insertion holes, and numbers "1" and "2" are marked at the positions of the insertion holes.

[0107] In summary, the connection interface between the plug 2 and the cable 5 includes an electrical transmission interface and a mechanical transmission interface. The electrical transmission interface is summarized as follows:

[0108] The wire crimping barrel structure at the rear end of the jack contact 26 is crimped and terminated with the wire core of the cable 5 .

[0109] The mechanical connection interface is summarized as follows:

[0110] The tail clamp sleeve 29 of the cable clamp component is connected to the internal thread at the rear end of the plug housing 21 through the external thread at the front end. The cable clamp component presses the power supply high-temperature cable 5 connected to the rear end of the socket contact 26 through the tail clamp pressure plate 27, stainless steel screws and spring washers 28 at the rear end. The clamping structure of the tail clamp pressure plate 27 at the rear of the cable clamp component can be adaptively modified according to the type of high-temperature power supply cable 5, such as a single wire or a cable, to adapt to the shape of the high-temperature power supply cable 5. The end of the flexible corrugated tube 51 is sealed and welded to the welding interface at the rear end of the plug housing 21, which can provide IP and mechanical protection for the cable 5.

[0111] The assembly process of the plug 2 is as follows, but not limited to this: the high insulator 23 is inserted into the plug housing 21, and then the socket contact 26 is crimped with the wire core and inserted into the high insulator, the insulating pressing plate II 24 is sleeved on the cable 5 and pushed into the plug housing 21, the cable clamp component is installed at the rear end of the plug housing 21 and the cable 5 is clamped and fixed, and the flexible bellows 51 is welded to the plug housing 21. The spring 211, the connecting nut 22, and the fixing nut 25 are installed on the plug housing 21 before assembly.

[0112] The pin insulator components (including the insulating pressure plate I13 and the short insulator 12) and the socket insulator components (including the insulating pressure plate II 24 and the tall insulator 23) are all made of ceramic materials. The pin contact 14, the socket contact 26, and the crimping threaded sleeve 17 are all made of nickel-silicon bronze material with good comprehensive performance of heat resistance and electrical conductivity. The socket sheath 261 is made of nickel-based high-temperature alloy. The spring 211 in the plug 2 and the corrugated grounding spring 19 in the socket 1 are made of high-temperature resistant austenitic elastic stainless steel, which are resistant to high temperature and radiation.

[0113] The joints of the metal shells, such as the joints of the socket shell 11 and the sleeve 4, and the joints of the flexible bellows 51 and the plug shell 21, are all sealed by welding; or, the joints of the metal shells, such as the joints of the socket shell 11 and the sleeve 4, and the joints of the flexible bellows 51 and the plug shell 21, are all sealed by "threaded connection + threaded connection edge laser spot welding" to avoid the use of organic sealing materials as much as possible, so as to ensure that the connection meets the characteristics of nuclear power high temperature, radiation exposure, IP protection requirements, anti-loosening and shock resistance.

[0114] When coupling with the headstock, Figure 5 As shown, the plug housing 21 is provided with a locking groove 2102 and a positioning pin 2101, and the socket housing 11 is riveted with a locking steel ball 18 and an identification groove 1101. Correct insertion is achieved by matching the positioning pin 2101 with the identification groove 111, and then the connecting nut 22 of the plug 2 can instantly limit the locking steel ball 18 of the socket 1 in the locking groove 2102 of the plug by a direct push form, and reliable locking is achieved by a compressed spring 211 to prevent the spring 211 from loosening and causing the locking steel ball 18 to disengage from the locking groove 2102, and rapid coupling between the head seats can be achieved instantly.

[0115] When the headstock is decoupled, Figure 6 As shown, by utilizing the flexible unlocking wire rope assembly (including the wire rope 212) of the plug housing 21, the wire rope 212 is pulled backwards, and the connecting nut 22 moves backwards, so that the locking steel ball 18 of the socket 1 and the locking groove 2102 of the plug can be quickly disengaged, and the plug 2 and the socket 1 can be quickly decoupled in an instant.

[0116] The rapid decoupling and coupling of the plug 2 and the socket 1 realizes the rapid decoupling and coupling of the cable 5 connected at the rear end of the plug 2 and the electric heater at the rear end of the socket 1 .

[0117] The quick connector assembly of the integrated small reactor pressurizer electric heater proposed in this case has the following advantages over the current technology of connecting the integrated small reactor pressurizer electric heater and the cable with a wiring copper nose and bolts:

[0118] 1. High operating efficiency: The electric heater and the socket 1 can be pre-integrated and installed. During the periodic shutdown and refueling of the integrated small-scale reactor, when performing the decoupling or coupling operation of the cable 5 and the heating rod 3, it is only necessary to push or pull the plug and the socket relative to each other to instantly complete the decoupling or coupling of the cable and the heating rod 3. The operation is simple, the required construction period is short, and the operating space requirement is not high, which can protect the personal safety of the operator to a large extent.

[0119] 2. Preventing the generation of waste materials: When performing the decoupling or coupling operation between the cable 5 and the heating rod 3, the operation can be completed instantly by only pushing or pulling the socket and the plug relative to each other. No additional tools or fasteners are required in this process, which fundamentally eliminates the risk of waste materials caused by operating tools and disassembling fasteners.

[0120] Embodiment 2 of the socket assembly for an integrated small reactor pressurizer electric heater of the present invention, based on the above embodiment, the sleeve 4 used for sealing between the front end of the heating rod 3 and the rear end interface of the socket 1 can also be fixed to the interface between the front end of the heating rod 3 and the rear end of the socket 1 by means of screws, rivets, etc.

[0121] Embodiment 3 of the socket assembly of the present invention for an integrated small reactor pressurizer stabilizer electric heater, based on the above embodiments, the connection form of the steel ball locking straight plug-in structure of the socket and the plug can be replaced by a connection method of a snap straight plug-in structure or other connection methods with a quick plug-in structure. On this basis, the locking steel ball 18 can be removed from the socket, and correspondingly, the steel ball locking groove 2102 and the wire rope 212, spring 211, connecting nut 22, and fixing nut 25 can be removed from the plug.

[0122] Embodiment 4 of a socket assembly for an integrated small stack pressurizer electric heater of the present invention, based on the above embodiments, replaces the socket contact in the socket with a pin contact and correspondingly replaces the plug contact in the plug with a jack contact.

[0123] In a fifth embodiment of a socket assembly for an integrated small stack pressurizer electric heater of the present invention, based on the above embodiments, a positioning pin can be arranged on the socket housing, and correspondingly, an identification groove can be arranged on the plug housing.

[0124] In the sixth embodiment of a socket assembly for an integrated small stack pressurizer electric heater of the present invention, based on the above embodiments, the tail of the pin contact 14 can be directly connected to the electrode column 32 through a wire, and the connection method can be welding or the like.

[0125] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A socket assembly for an integrated small reactor pressurizer electric heater, comprising a socket (1) and a heating rod (3), characterized in that: The rear end of the socket contact piece in the socket (1) is connected to the electrode column (32) corresponding to the front end of the heating rod in the electric heater via a wire, and a sleeve (4) is fixedly mounted on the rear end of the socket housing (11) and the outer wall of the front end of the heating rod, and the sleeve (4) is used to wrap the wire and the electrode column (32).

2. A socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: The socket contact is a pin contact (14) or a socket contact (26), the rear end of the socket contact is a wire crimping barrel structure for crimping with a wire, and when the socket contact is a socket contact (26), a socket sheath (261) is sleeved on the outer side of the front end of the socket contact (26).

3. A socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: A short insulator (12) and an insulating pressure plate I (13) are arranged in the socket shell (11) of the socket (1); a stopper structure cooperating with the short insulator (12) to stop forward is arranged on the inner wall of the socket shell (11); the socket contact is inserted into the short insulator (12); the short insulator (12) and the socket contact cooperate to stop forward; the insulating pressure plate I (13) is inserted at the rear side of the short insulator (12) and cooperates with the socket contact and the short insulator (12) to stop backward; a threaded retaining ring (15) cooperating with the insulating pressure plate I (13) to stop backward is arranged at the rear end of the socket shell (11).

4. A socket assembly for an integrated small reactor pressurizer electric heater according to claim 3, characterized in that: The front end surface of the insulating pressure plate I (13) is provided with a boss, the rear end of the short insulator (12) is provided with a step hole, the socket contact is inserted into the step hole of the short insulator (12), the step in the step hole blocks the ring of the outer circumference of the plug pin contact (14) forward, and the boss on the insulating pressure plate I (13) is inserted into the step hole of the short insulator (12) and blocks the ring of the plug pin contact 14 backward.

5. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: The front end wall of the socket housing (11) of the socket (1) is embedded with a locking steel ball (18) capable of radial sliding. When the head seats are plugged in, the locking steel ball (18) is stuck in the steel ball locking groove (2102) of the corresponding plug (2).

6. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: The front end of the socket housing (11) of the socket (1) is provided with an identification groove (1101) for mating with a positioning pin (2101) on a corresponding plug (1).

7. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: The inner cavity of the socket housing (11) of the socket (1) is embedded with a corrugated grounding spring (19) for contacting the plug housing (21) of the plug (2) after the header is plugged in.

8. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: The other end of the wire connected to the socket contact is crimped to a crimping threaded sleeve (17), and the other end of the crimping threaded sleeve (17) is threadedly connected to an external thread (31) on an electrode column (32).

9. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: An insulating pressing plate I (13) is provided in the socket (1) for engaging with the socket contact piece to stop backwards, and the maximum outer circle size of the crimping threaded sleeve (17) is smaller than the inner hole size of the insulating pressing plate I (13).

10. The socket assembly for an integrated small reactor pressurizer electric heater according to claim 1, characterized in that: A plug (2) matching the socket (1) is connected to the socket (1) via a quick plug-in structure.

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