A method for butt-jointing coil wires

Abstract

The present application discloses a method for butt - jointing coil wires. After removing the insulation layer from the ends of the coil wires to be connected, they are folded in half, crossed and wound around each other to form a butt - joint point. The butt - joint point is welded and fixed on the secondary skeleton. Through tensile tests, it can be obtained that this connection method enables the butt - joint point to withstand stronger thermal stress and improves the connection strength between coil wires; after removing the insulation layers from both ends of the coil wires and coil leads to be connected, connection terminals are connected and welded, and the welded connection terminals are fixed on the secondary skeleton. The connection terminals are used to bear the tensile force between the coil wires and coil leads, improving the connection strength between the coil wires and coil leads; the coil leads are arranged in a wavy shape along the axial direction of the secondary skeleton, reducing the tensile force on the connection part due to the expansion of the secondary skeleton, further improving the connection strength between the coil leads and coil wires, reducing the disconnection fault at the connection part, and improving the stability of the detector operation.

Description

Technical Field

[0001] This application relates to the technical field of reactor control rod position detectors, and more specifically, to a method for butt - jointing coil wires. Background Art

[0002] A reactor control rod position detector includes an inner cylinder, a secondary skeleton, and an outer cylinder. The position detection of the detector is achieved by winding coils on the detector. Among them, between the same - type coils on the secondary skeleton, the coil wires need to be connected to each other first through coil wires, and then the coil wires of various types of coils are connected to an aviation plug through coil leads. However, in the prior art, the connection strength between the coil wires and between the coil wires and the coil leads is relatively low, resulting in a wire - breakage fault at the connection during the operation, which affects the detection operation of the detector.

[0003] In summary, how to improve the connection strength between the coil wires and between the coil wires and the coil leads, and reduce the wire - breakage fault at the connection is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method for butt - jointing coil wires, which can improve the connection strength between the coil wires and between the coil wires and the coil leads, and reduce the wire - breakage fault at the connection.

[0005] To achieve the above - mentioned purpose, this application provides the following technical solutions:

[0006] A method for butt - jointing coil wires includes: winding coils of various types on the secondary skeleton; connecting the coil wires between adjacent coils of the same type. Among them, connecting the coil wires between adjacent coils of the same type specifically includes: removing the insulation layers at the ends of the two coil wires to be butted; folding the ends of the two coil wires after removing the insulation layers and cross - winding them, and vertically winding the remaining tails at both ends after cross - winding around the bus bar to form the butt - joints of the two coil wires; welding the butt - joints and fixing the butt - joints on the secondary skeleton.

[0007] The coil wires connecting various types of coils and the coil leads of the aviation plug; wherein, connecting the coil wires of various types of coils and the coil leads of the aviation plug specifically includes: extending the coil leads in a wavy shape from the aviation plug to the coil wires to be connected, pre-fixing the coil leads on the secondary skeleton, and the wavy shape of the coil leads extending along the axial direction of the secondary skeleton; removing the insulation layers at the ends of the coil wires to be connected and the insulation layers at the ends of the coil leads; winding the coil wires after removing the insulation layers around the first end of the connection terminal to form a first connection point, and winding the coil leads after removing the insulation layers around the second end of the connection terminal to form a second connection point; respectively soldering the first connection point and the second connection point, and fixing the connection terminal on the secondary skeleton.

[0008] In some embodiments, removing the insulation layers at the ends of the coil wires to be connected and the insulation layers at the ends of the coil leads specifically includes: folding the end of the coil wire to be connected by 100 - 150 mm, and removing the insulation layer at the end of the folded coil wire by 20 - 30 mm; removing the insulation layer at the end of the coil lead to be connected by 20 - 30 mm.

[0009] In some embodiments, the connection terminal includes a first connection hole, a second connection hole, and a mounting hole, and the connection terminal includes a first side and a second side arranged opposite to each other; winding the coil wires after removing the insulation layers around the first end of the connection terminal to form a first connection point, and winding the coil leads after removing the insulation layers around the second end of the connection terminal to form a second connection point specifically includes: twisting the coil wires after folding and removing the insulation layers into a twist shape, passing through the first connection hole from the first side of the connection terminal, and winding 2 - 3 turns around the first end of the connection terminal; passing the coil leads after removing the insulation layers through the second connection hole from the first side of the connection terminal, and winding 5 - 10 turns around the second end of the connection terminal.

[0010] In some embodiments, the first connection point and the second connection point are welded respectively, and the connection terminal is fixed on the secondary skeleton. Specifically, it includes: using a brazing device to weld the first connection point and the second connection point respectively, so that the winding turns of the coil wire and the connection terminal and the winding turns of the coil lead and the connection terminal are both welded on the connection terminal; spraying and brushing insulating paint on the welded connection terminal, the first connection point and the second connection point, and air-drying the insulating paint; fixing the connection terminal on the secondary skeleton through the mounting hole and a threaded fastener, such that the second side of the connection terminal fits the secondary skeleton, and the length direction of the connection terminal extends along the axial direction of the secondary skeleton; arranging the coil wires and the coil leads at both ends of the connection terminal in a wavy shape along the axial direction of the secondary skeleton; binding the connection terminal fixed on the secondary skeleton.

[0011] In some embodiments, binding the connection terminal fixed on the secondary skeleton specifically includes: binding from the first connection point towards the coil lead end: using polyimide tape to bind at least 3 layers; then using non-alkali fiberglass tape to bind at least 3 layers on the outer layer of the polyimide tape, and leaving 150 - 180 mm of the non-alkali fiberglass for tightening and fixing after binding; then using polyimide tape to bind at least 3 layers on the outer layer of the non-alkali fiberglass, and making the outermost layer of the polyimide tape cover the non-alkali fiberglass.

[0012] In some embodiments, the positions for pre-fixing the coil leads on the secondary skeleton are the peaks and valleys of the wavy coil leads.

[0013] In some embodiments, the distance between the peak and the valley of the wavy coil lead is at least 60 mm; the distance between the peak and the valley of the wavy coil wire is at least 20 mm.

[0014] In some embodiments, removing the insulation layers at the ends of two coil wires to be butted specifically includes: removing the insulation layers at the ends of the two coil wires to be butted by 35 - 45 mm.

[0015] In some embodiments, after folding the ends of the two coil wires with the insulation layers removed in half and cross-winding them, winding the remaining tails at both ends vertically around the busbar respectively to form the butt joints of the two coil wires. Specifically, it includes: crossing the two coil wires folded in half after removing the insulation layers in an X shape and winding them at least 3 times, and winding the remaining tails at both ends vertically around the busbar respectively, and winding the remaining tails around the busbar at least 3 times.

[0016] In some embodiments, welding the butt joint and fixing the butt joint on the secondary skeleton specifically includes: welding the winding parts of the two coil wires by using a brazing device; spraying and brushing insulating paint on the butt joint of the two welded coil wires and air-drying the insulating paint; sleeving a silicone paint sleeve on the butt joint after air-drying the insulating paint, and fixing the butt joint with the sleeved silicone paint sleeve on the secondary skeleton.

[0017] In some embodiments, fixing the butt joint with the sleeved silicone paint sleeve on the secondary skeleton specifically includes: first fixing a circle of polyimide tape at both ends of the butt joint; then semi-overlapping and wrapping at least 3 layers from the first end to the second end of the butt joint with polyimide tape; then semi-overlapping and wrapping at least 3 layers of non-alkali glass fiber on the outer layer of the polyimide tape; then semi-overlapping and wrapping at least 3 layers of polyimide tape on the outer layer of the non-alkali glass fiber, and making the outermost layer of the polyimide tape cover the non-alkali glass fiber.

[0018] In some embodiments, before fixing the butt joint with the sleeved silicone paint sleeve on the secondary skeleton, the coil wires at both ends of the butt joint are distributed in a wavy shape, and the distance between the wave crests and wave troughs of the wavy coil wires is at least 20 mm.

[0019] The coil wire butt - joint method provided by this application removes the insulation layer from the ends of the coil wires that need to be connected between adjacent coils of the same type. Then, the two coil wires after removing the insulation layer are folded in half and cross - wound to form a butt - joint point. After that, the butt - joint point is welded and fixed on the secondary skeleton. Through tensile tests, it can be obtained that by the connection method of removing the insulation layer from the two coil wires, folding them in half, cross - winding, and welding, both ends of the butt - joint point of the two coil wires can withstand stronger thermal stress, improving the connection strength between the coil wires; after removing the insulation layer from both ends of the coil wires of various types that need to be connected and the coil leads of the aviation plug, they are respectively connected to the first end and the second end of the connection terminal to form a first connection point and a second connection point. The first connection point and the second connection point are respectively welded, and the connection terminal after welding is fixed on the secondary skeleton. The coil wires and the coil leads are butt - jointed through the connection terminal, and the connection terminal bears the tensile force between the coil wires and the coil leads, improving the connection strength between the coil wires and the coil leads; and by fixing the coil leads in a wavy shape along the axial direction of the secondary skeleton, during the operation of the detector, when the secondary skeleton expands due to the thermal environment, the wavy coil leads can have a deformation amount that follows the deformation of the secondary skeleton, reducing the tensile force on the connection between the coil leads and the coil wires due to the expansion of the secondary skeleton, further improving the connection strength between the coil leads and the coil wires. In this way, through the coil wire butt - joint method provided by the embodiments of this application, the connection strength between the coil wires, between the coil wires and the coil leads is improved, the disconnection fault at the connection is reduced, and the stability of the detector operation is improved. Brief Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0021] Figure 1 It is a schematic diagram of the coil connection method on the secondary skeleton provided by the embodiments of this application;

[0022] Figure 2 It is a schematic diagram of the structure of the connection terminal provided by the embodiments of this application;

[0023] Figure 3 It is a schematic diagram of the connection between the coil wires and the coil leads and the connection terminal provided by the embodiments of this application;

[0024] Figure 4 It is a schematic diagram of the connection between the coil wires provided by the embodiments of this application; where, Figure 4Figure a is a schematic diagram of the first step of connecting a coil wire to a coil wire provided by an embodiment of the present application; Figure 4 Figure b is a schematic diagram of the second step of connecting a coil wire to a coil wire provided by an embodiment of the present application; Figure 4 Figure c is a schematic diagram of the third step of connecting a coil wire to a coil wire provided by an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1 - Coil wire, 2 - Coil lead, 3 - Connection terminal, 31 - First connection hole, 32 - Second connection hole, 33 - Mounting hole, 4 - Aviation plug, 5 - Secondary skeleton;

[0027] 100 - Coil A, 200 - Coil B, 300 - Coil C, 400 - Coil D, 500 - Coil E, 600 - Auxiliary coil. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an", "the", "above", "said", "this" are also intended to include the forms such as "one or more", unless clearly indicated to the contrary in the context.

[0030] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0031] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0032] Currently, the coil wires of the reactor control rod position detector are usually terminated by cold pressure welding between the coil wires. By aligning the cross-sections of the two coil wires to be butt-jointed and directly pressing them together, in the case of impurities in the cross-section of the coil wire or aging of the pressing tool, etc., the pressing quality will be poor, resulting in easy wire breakage faults under large temperature changes, and the connection strength between the coil wires is poor; when butt-jointing the coil wire and the coil lead, the coil wire is usually wound around the coil lead multiple times and fixed by hot melting, so that the butt-joint of the coil wire and the coil lead generates fatigue wire breakage faults under repeated thermal stress, and due to the thermal expansion of the secondary skeleton during the operation of the detection rod, the two ends of the butt-joint of the coil lead and the coil wire will be subjected to tensile forces, further increasing the risk of wire breakage faults and affecting the detection operation of the detector.

[0033] A coil wire butt-jointing method provided by the embodiments of the present application includes:

[0034] S1. Connect the coil wire 1 and the coil wire 1 between adjacent coils of the same type;

[0035] As Figure 1 shown, grooves for winding coils are provided on the secondary skeleton 5, and coils are formed by winding copper wires in the grooves. On one secondary skeleton 5, it includes auxiliary coils arranged at both ends, and A / B / C / D / E coils, and the corresponding numbers of A / B / C / D / E coils are 16 / 8 / 4 / 2 / 1, and they are arranged on the secondary skeleton 5 in a certain order.

[0036] It is necessary to butt-joint the coils of the same type through the reserved coil wire 1. As Figure 1 shown, butt-joint the 16 A coils respectively, butt-joint the 8 B coils respectively, butt-joint the 4 C coils respectively, butt-joint the 2 D coils respectively, and butt-joint the auxiliary coils at both ends (not shown in the figure).

[0037] It should be noted that in actual situations, the A / B / C / D / E coils are interspersed with each other. Figure 1 For the convenience of understanding, it is shown as the coils of the same type being distributed together in , and they can be arranged and distributed according to the actual situation. The embodiments of the present application do not limit this comparison.

[0038] S11. Remove the insulating layers at the ends of the two coil wires 1 to be butt-jointed;

[0039] Remove the insulation layer at the ends of the two coil wires 1 to be docked by 35 - 45 mm, preferably 40 mm, so as to facilitate folding after removing the insulation layer and ensure the resistance value and connection strength after docking the ends of the coil wires 1.

[0040] S12. Dock the ends of the two coil wires 1 after removing the insulation layer;

[0041] As Figure 4 shown in a, first fold the ends of the two coil wires 1 after removing the insulation layer and cross them into an X shape, and then wind around at least 3 turns to improve the connection strength, forming a winding part as shown in Figure 4 b. Then, wind the tails of the two remaining ends after winding as shown in Figure 4 b vertically around the bus bar, and the remaining tails wind around the bus bar for at least 3 turns, forming a docking point of the two coil wires 1 as shown in Figure 4 c.

[0042] S13. Weld the docking points of the two coil wires 1;

[0043] Use an electric soldering iron, tin - lead - silver brazing wire, and rosin to weld and fix all the docking points of the two coil wires 1; then spray and brush the welded docking points with 1053 insulating paint, and use a hair dryer to dry until the insulating paint does not flow or drip. Then spray and brush with 1053 insulating paint again and dry again with a hair dryer to ensure that the winding parts of the two coil wires 1 are covered with insulating paint.

[0044] S14. Fix the docking points on the secondary skeleton 5;

[0045] Socket a silicone paint sleeve at the docking points and fix the docking points with the socketed silicone paint sleeves on the secondary skeleton 5;

[0046] Distribute the coil wires 1 at both ends of the docking point in a wavy shape, and make the wavy shape extend along the axial direction of the secondary skeleton 5, and ensure that the distance between the wave crests and wave troughs of the wavy coil wires 1 is at least 20 mm, so that when the secondary skeleton 5 expands due to heat, the coil wires 1 at both ends of the docking point have a deformation amount, reducing the tension generated on the coil wires 1 at both ends of the docking point due to the expansion of the secondary skeleton 5, and enhancing the connection strength between the coil wires 1 and the coil wires 1;

[0047] First, fix a 5 - mm - wide polyimide tape around both ends of the docking point;

[0048] After that, use polyimide tape to start winding from the first end of the docking point and 10 mm away from the first end, and use a semi - overlapping wrapping method to wrap at least 3 layers until the second end of the docking point and 10 mm away from the second end. It should be noted that the polyimide tape has high heat - resistance and radiation - resistance properties, and can be better applied to reactor operations. In this way, the first layer of polyimide tape first fixes the docking point and enhances the insulation at the docking point.

[0049] After that, use non - alkali glass fiber to semi - overlap and wrap at least 3 layers on the outer layer of the first layer of polyimide tape. Since the secondary skeleton 5 will expand due to heat during the detection operation, in order to ensure that the coil wires 1 at both ends of the docking point can deform when the secondary skeleton 5 expands due to heat, and avoid being too tightly tied by the polyimide tape, use non - alkali glass fiber for fixation to provide a deformation space for the coil wires 1.

[0050] After that, use polyimide tape to semi - overlap and wrap at least 3 layers on the outer layer of the non - alkali glass fiber, and make the outermost layer of polyimide tape cover the non - alkali glass fiber to ensure that the non - alkali glass fiber does not come loose, further ensure the insulation of the docking point, and improve wear resistance.

[0051] It should be noted that the semi - overlapping wrapping means that the width of the latter circle presses half of the width of the previous circle, and so on, to ensure that the docking point can be fully wrapped and covered, and ensure the wrapping strength and insulation of the docking point.

[0052] In actual situations, since the lengths of the coil wires 1 reserved for docking of each coil are different, when the docking length is not enough, additional wires need to be added for direct docking of the two coil wires 1. Therefore, on the premise of ensuring that the waveforms of the coil wires 1 at both ends of the docking point have sufficient deformation, the docking points between the wires should be avoided as much as possible to improve the connection strength between the coil wires 1.

[0053] Conduct a tensile test on the docking point after docking using the method for docking between coil wires 1 provided in the embodiments of the present application. Table 1 shows the tensile test data of the coil wire docking points.

[0054] Table 1 Tensile test data of coil wire docking points

[0055]

[0056] From the data of the breaking force of the 1st to 10th groups in Table 1, it can be seen that in the breaking test of the butt joint formed by the coil wire 1 provided by the embodiment of the present application and the butt joint method of the coil wire 1, the average breaking force is 7.66 N, and the minimum breaking force is 6.8 N; according to the prior art, the range of the breaking force after butt-jointing the coil wire 1 and the coil wire 1 by cold pressure welding is 1.4 - 5.7 N. It can be seen that the butt joint formed by using the butt joint method of the coil wire 1 and the coil wire 1 provided by the embodiment of the present application can withstand a higher breaking force, improve the connection strength between the coil wire 1 and the coil wire 1, and reduce the wire breakage fault during the operation of the detector.

[0057] S2. Connect the coil wire 1 of each type of coil and the coil lead 2 of the aviation plug 4;

[0058] As Figure 1 shown, after butt-jointing the same type of coil wires 1, it is necessary to lead out the coil lead 2 from the aviation plug 4 and connect it to the A\B\C\D\E\auxiliary coils respectively; it should be noted that in actual situations, the aviation plug 4 is fixed on the outer cylinder, and the outer cylinder is sleeved on the secondary skeleton 5, Figure 1 only the relative positions of the aviation plug 4 and the secondary skeleton 5 are schematically shown, and the gap between the outer cylinder and the secondary skeleton 5 is small, which will not affect the connection of the coil lead 2.

[0059] S21. Extend the coil lead 2 from the aviation plug 4 to the coil wires 1 to be connected in a wavy shape, and pre-fix the coil lead 2 on the secondary skeleton 5, and the wavy shape of the coil lead 2 extends along the axis of the secondary skeleton 5;

[0060] Since there is a certain distance between the coil lead 2 and the coil wires 1 to be connected, use polyimide tape to wind around the peaks and valleys of the wavy coil lead 2 for pre-fixing to ensure that the wavy shape of the coil lead 2 does not deform during the butt-jointing process of the coil lead 2 and the coil wires 1.

[0061] S22. Remove the insulation layers at the ends of the coil wires 1 to be connected and the insulation layers at the ends of the coil leads 2;

[0062] Fold the end of the coil wire 1 to be connected by 100 - 150 mm to increase the connection strength between the coil wire 1 and the connection terminal in the future, and remove the insulation layer at the end of the folded coil wire 1 by 20 - 30 mm, preferably 25 mm;

[0063] Remove the insulation layer at the end of the coil lead 2 to be connected by 20 - 30 mm, preferably 25 mm.

[0064] S23. Connect the coil wire 1 after removing the insulation layer and the coil lead 2 using the connection terminal 3;

[0065] As Figures 2 - 3 shown, the connection terminal 3 includes a first connection hole 31, a second connection hole 32, and a mounting hole 33, and the connection terminal 3 includes a first side and a second side arranged oppositely. To ensure connection transmission, the connection terminal 3 is a copper terminal;

[0066] Twist the coil wire 1 after folding in half and removing the insulation layer into a twist shape, insert it into the first connection hole 31 from the first side of the connection terminal 3, and wind it around the first end of the connection terminal 3 for 2 - 3 turns to form a first connection point, so as to improve the connection strength between the coil wire 1 and the connection terminal 3;

[0067] Insert the coil lead 2 after removing the insulation layer into the second connection hole 32 from the first side of the connection terminal 3, and wind it around the second end of the connection terminal 3 for 5 - 10 turns to form a second connection point. Since the coil lead 2 is thicker than the coil wire 1, by increasing the number of winding turns of the coil lead 2 and the connection terminal 3, the connection strength between the coil lead 2 and the connection terminal 3 is improved, and at the same time, avoid winding too many turns to ensure that the resistance of the second connection point formed after the coil lead 2 is connected to the connection terminal 3 is not higher than its own resistance;

[0068] It should be noted that the coil wire 1 and the coil lead 2 need to be inserted into the connection terminal 3 on the same side of the connection terminal 3 to reduce the wear on the coil wire 1 and the coil lead 2 when the connection terminal 3 is subsequently fixed on the secondary skeleton 5.

[0069] S24. Weld the connection terminal 3;

[0070] Use a soldering iron, tin - lead - silver brazing wire, and rosin flux to weld the first connection point and the second connection point respectively, so that the winding turns of the coil wire 1 and the connection terminal 3 and the winding turns of the coil lead 2 and the connection terminal 3 are all welded to the connection terminal 3;

[0071] Spray and brush the welded connection terminal 3, the first connection point, and the second connection point with 1053 insulating paint, and use a hair dryer to dry it until it does not flow or drip. Then spray and brush it again with 1053 insulating paint and dry it again to ensure that the connection terminal 3, the first connection point, and the second connection point are all covered with insulating paint.

[0072] S25. Fix the connection terminal 3 on the secondary skeleton 5;

[0073] First, the second side of the connection terminal 3 is attached to the secondary skeleton 5 to ensure that both the coil wire 1 and the coil lead 2 penetrate from the first side of the connection terminal 3 away from the secondary skeleton 5, so as to reduce the wear of the coil wire 1 and the coil lead 2 due to vibration during the operation of the detector, and further reduce the occurrence of wire breakage faults; and make the length direction of the connection terminal 3 extend along the axial direction of the secondary skeleton 5, reducing the tension on the coil wire 1 and the coil lead 2 at both ends of the connection terminal 3 due to the expansion of the secondary skeleton 5 during the operation of the detector, and further reducing the occurrence of wire breakage faults.

[0074] Using threaded fasteners and gaskets, the connection terminal 3 is fixed to the secondary skeleton 5 through the mounting holes 33 of the connection terminal 3, and the coil wire 1 and the coil lead 2 at both ends of the connection terminal 3 are distributed in a wavy shape along the axial direction of the secondary skeleton 5.

[0075] The distance between the wave crest and the wave trough of the wavy shape of the coil wire 1 is at least 20 mm, and the distance between the wave crest and the wave trough of the wavy shape of the coil lead 2 is at least 60 mm, so that during the process of the secondary skeleton expanding due to heat during the operation of the detector, both the coil wire 1 and the coil lead 2 have deformation amounts, reducing the tension on the coil wire 1 and the coil lead 2 at both ends of the connection terminal 3, improving the connection strength between the coil wire 1 and the coil lead 2, and reducing the occurrence of wire breakage faults.

[0076] S26. Bind the connection terminal 3.

[0077] Bind from the first connection point of the connection terminal 3 and the coil wire 1 towards the coil lead 2.

[0078] First, use a polyimide tape with a width of 80 - 120 mm to bind at least 3 layers. In this way, the first layer of polyimide tape first fixes the connection terminal 3 and enhances the insulation at the connection terminal 3.

[0079] After that, use non-alkali glass fiber to half-overlap and wrap at least 3 layers on the outer layer of the first layer of polyimide tape, and leave 150 - 180 mm of non-alkali glass fiber to be tightened and fixed after binding. Since during the detection operation, the secondary skeleton 5 will expand due to heat, in order to ensure that the coil wire 1 and the coil lead 2 at both ends of the connection terminal 3 can deform when the secondary skeleton 5 expands due to heat, avoid being too tightly bound by the polyimide tape all through, and fix with non-alkali glass fiber to provide a deformation space for the coil wire 1 and the coil lead 2.

[0080] After that, use polyimide tape to half-overlap and wrap at least 3 layers on the outer layer of the non-alkali glass fiber, and make the outermost layer of polyimide tape cover the non-alkali glass fiber to ensure that the non-alkali glass fiber does not come loose, further ensure the insulation of the docking point, and improve the wear resistance.

[0081] It should be noted that, in actual situations, in order to avoid repeated binding, it is necessary to connect all coil wires 1 with coil wires 1, and all coil wires 1 with coil leads 2 before binding. For the same fixing point of the docking point and the connecting terminal 3, only one binding is performed to avoid as much as possible the situation where the outer cylinder cannot be inserted due to the thickness of the secondary skeleton 5 being too thick due to repeated binding, so as to ensure the normal operation of the detector.

[0082] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be 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 present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for butt - jointing coil wires, characterized in that, Including: Winding coils of various types around the secondary skeleton; Connecting coil wires to coil wires between adjacent coils of the same type; Among them, connecting coil wires to coil wires between adjacent coils of the same type specifically includes: removing the insulation layers at the ends of the two coil wires to be butted; folding the ends of the two coil wires after removing the insulation layers and cross-winding them, and vertically winding the remaining tails at both ends around the busbar respectively to form the butt joints of the two coil wires; welding the butt joints and fixing the butt joints on the secondary skeleton; Connecting the coil wires of each type of coil to the coil leads of the aviation plug; Among them, connecting the coil wires of each type of coil to the coil leads of the aviation plug specifically includes: extending the coil leads in a wavy shape from the aviation plug between the coil wires to be connected, and pre-fixing the coil leads on the secondary skeleton, and the wavy shape of the coil leads extends along the axial direction of the secondary skeleton; removing the insulation layers at the ends of the coil wires to be connected and the insulation layers at the ends of the coil leads; winding the coil wires after removing the insulation layers around the first end of the connection terminal to form a first connection point, and winding the coil leads after removing the insulation layers around the second end of the connection terminal to form a second connection point; respectively welding the first connection point and the second connection point, and fixing the connection terminal on the secondary skeleton.

2. The coil wire butt joint method according to claim 1, characterized in that Removing the insulation layers at the ends of the coil wires to be connected and the insulation layers at the ends of the coil leads specifically includes: Folding the end of the coil wire to be connected by 100 - 150 mm, and removing the insulation layer of 20 - 30 mm at the folded end of the coil wire; Removing the insulation layer of 20 - 30 mm at the end of the coil lead to be connected.

3. The coil wire butt joint method according to claim 2, characterized in that, The connection terminal includes a first connection hole, a second connection hole and a mounting hole, and the connection terminal includes a first side and a second side arranged oppositely; Winding the coil wire after removing the insulation layer around the first end of the connection terminal to form a first connection point, and winding the coil lead after removing the insulation layer around the second end of the connection terminal to form a second connection point specifically includes: twisting the coil wire after folding and removing the insulation layer into a twist shape, passing it through the first connection hole from the first side of the connection terminal, and winding it around the first end of the connection terminal for 2 - 3 turns; passing the coil lead after removing the insulation layer through the second connection hole from the first side of the connection terminal, and winding it around the second end of the connection terminal for 5 - 10 turns.

4. The coil wire butt-joint method according to claim 3, wherein Respectively welding the first connection point and the second connection point, and fixing the connection terminal on the secondary skeleton specifically includes: Using a brazing device to respectively weld the first connection point and the second connection point, so that the winding turns of the coil wire and the connection terminal and the winding turns of the coil lead and the connection terminal are all welded on the connection terminal; Spraying and brushing insulating paint on the welded connection terminal, the first connection point and the second connection point, and air-drying the insulating paint; Fix the connection terminal on the secondary skeleton through the mounting hole and the threaded fastener, such that the second side of the connection terminal fits against the secondary skeleton, and the length direction of the connection terminal extends axially along the secondary skeleton; Arrange the coil wires and the coil leads at both ends of the connection terminal in a wavy pattern along the axis of the secondary skeleton; Bind the connection terminal fixed on the secondary skeleton.

5. The coil wire butt joint method according to claim 4, wherein, Binding the connection terminal fixed on the secondary skeleton specifically includes: Bind from the first connection point towards the coil lead end; Bind at least 3 layers with polyimide tape; then bind at least 3 layers with non-alkali glass fiber on the outer layer of the polyimide tape, and leave 150 - 180 mm of the non-alkali glass fiber for tightening and fixing after binding; then bind at least 3 layers with polyimide tape on the outer layer of the non-alkali glass fiber, and make the outermost layer of the polyimide tape cover the non-alkali glass fiber.

6. The coil wire butt joint method according to claim 5, characterized in that, The positions for pre-fixing the coil leads on the secondary skeleton are the peaks and valleys of the wavy coil leads.

7. The coil wire butt joint method according to claim 6, wherein, The distance between the peaks and valleys of the wavy coil leads is at least 60 mm; The distance between the peaks and valleys of the wavy coil wires is at least 20 mm.

8. The coil wire butt-joint method according to claim 1, wherein Remove the insulation layers at the ends of the two coil wires to be butt-jointed, specifically including: Remove the insulation layers at the ends of the two coil wires to be butt-jointed by 35 - 45 mm each.

9. The coil wire butt joint method according to claim 8, characterized in that, Fold the ends of the two coil wires after removing the insulation layers in half and cross-wind them, and wind the remaining tails at both ends vertically around the busbar respectively to form the butt-joints of the two coil wires, specifically including: Cross the two coil wires folded in half after removing the insulation layers into an X shape and wind them around at least 3 turns, and wind the remaining tails at both ends vertically around the busbar respectively, and wind the remaining tails around the busbar at least 3 turns.

10. The coil wire butt joint method according to claim 9, characterized in that, Weld the butt-joints and fix the butt-joints on the secondary skeleton, specifically including: Weld the winding parts of the two coil wires using a brazing device; Spray and brush insulating paint on the butt-joints of the two coil wires after welding, and air-dry the insulating paint; Socket a silicone paint sleeve at the butt-joints after air-drying the insulating paint, and fix the butt-joints with the silicone paint sleeves socketed on the secondary skeleton.

11. The coil wire butt joint method according to claim 10, characterized in that, Fix the butt-joints with the silicone paint sleeves socketed on the secondary skeleton, specifically including: First, fix a circle of polyimide tape at both ends of the butt-joint; Then, semi-overlap and wrap at least 3 layers of polyimide tape from the first end to the second end of the butt-joint; Then, semi-overlap and wrap at least 3 layers of non-alkali glass fiber on the outer layer of the polyimide tape; Then, semi-overlap and wrap at least 3 layers of polyimide tape on the outer layer of the non-alkali glass fiber, and make the outermost layer of the polyimide tape cover the non-alkali glass fiber.

12. The coil wire butt joint method according to claim 10, characterized in that, Before fixing the docking point of the sleeved silicone paint sleeve on the secondary skeleton, the coil wires at both ends of the docking point are distributed in a wavy shape, and the distance between the wave crests and wave troughs of the wavy coil wires is at least 20 mm.

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