Coil wire butt joint method

Abstract

The invention discloses a coil wire butt joint method, which comprises the following steps: removing an insulating layer from the end part of a coil wire to be connected, then folding, crossing and oppositely winding to form a butt joint point, welding the butt joint point and fixing the butt joint point on a secondary framework, and obtaining the butt joint point through a tension test. The connection strength between the coil wires is improved; after insulating layers of the two ends of the coil wire and the two ends of the coil lead wire which need to be connected are removed, the coil wire and the coil lead wire are connected with the connecting terminals and welded, the welded connecting terminals are fixed to the secondary framework, the connecting terminals are used for bearing pulling force between the coil wire and the coil lead wire, and the connecting strength between the coil wire and the coil lead wire is improved; the coil lead is arranged in a wave shape along the axial direction of the secondary framework, so that the pulling force on the joint due to the expansion of the secondary framework is reduced, the connection strength of the coil lead and the coil wire is further improved, the wire breaking fault at the joint is reduced, and the operation stability of the detector is improved.

Description

Technical Field

[0001] The present application relates to the technical field of reactor control rod position detectors, and more specifically, to a coil wire docking method. Background Art

[0002] The reactor control rod position detector includes an inner cylinder, a secondary frame and an outer cylinder. The position detection of the detector is achieved by winding a coil on the detector. The same type of coils need to be connected to each other through coil wires on the secondary frame, and then the coil wires of each type of coils are connected to the aviation plug through coil leads. However, in the prior art, the connection strength between the coil wires and the coil wires, and between the coil wires and the coil leads is low, resulting in a broken wire failure at the connection during operation, affecting the detection operation of the detector.

[0003] In summary, how to improve the connection strength between coil wires and coil wires, and between coil wires and coil leads, and reduce wire breakage failures at the connection points is a problem that currently needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a coil wire docking method to improve the connection strength between coil wires and coil wires, and between coil wires and coil leads, and reduce wire breakage failures at the connection points.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A method for butt jointing coil wires, comprising: connecting coil wires between adjacent coils of the same type, removing the insulation layer of the ends of the two coil wires to be butt jointed; folding the two coil wires after the insulation layer is removed in half and then cross-winding them to form a butt joint point of the two coil wires; welding the butt joint point and fixing the butt joint point on a secondary frame;

[0007] Connect the coil wires of various types of coils with the coil leads of the aviation plug, remove the insulation layer at the ends of the coil wires and the ends of the coil leads that need to be connected; wind the coil wire after removing the insulation layer around the first end of the connecting terminal to form a first connection point, and wind the coil lead after removing the insulation layer around the second end of the connecting terminal to form a second connection point; weld the first connection point and the second connection point respectively, and fix the connecting terminal on the secondary skeleton; arrange the coil leads in a wave shape and fix them on the secondary skeleton, with the wave shape extending along the axial direction of the secondary skeleton.

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

[0009] In some embodiments, the connecting terminal includes a first connecting hole, a second connecting hole and a mounting hole, and the connecting terminal includes a first side and a second side arranged opposite to each other; the coil wire after removing the insulation layer is wound around the first end of the connecting terminal to form a first connection point, and the coil lead wire after removing the insulation layer is wound around the second end of the connecting terminal to form a second connection point, specifically including: twisting the coil wire after folding in half and removing the insulation layer into a twist shape, inserting it into the first connecting hole from the first side of the connecting terminal, and wrapping it around the first end of the connecting terminal for 2-3 turns; inserting the coil lead wire after removing the insulation layer from the first side of the connecting terminal into the second connecting hole, and wrapping it around the second end of the connecting terminal for 5-10 turns.

[0010] In some embodiments, the first connection point and the second connection point are welded respectively, and the connection terminal is fixed to the secondary skeleton, specifically including: using a brazing device to weld the first connection point and the second connection point respectively, so that the winding circle of the coil wire and the connection terminal and the winding circle of the coil lead and the connection terminal are welded to the connection terminal; spraying 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 to the secondary skeleton through the mounting hole and the threaded fastener, so that the second side of the connection terminal is in contact with the secondary skeleton, and the length direction of the connection terminal is arranged along the axial extension of the secondary skeleton.

[0011] In some embodiments, the connection terminals fixed on the secondary skeleton are tied and fixed, and the tying is performed from the first connection point and the second connection point to the coil lead end, specifically including: tying at least 3 layers with polyimide tape; then tying at least 3 layers with alkali-free glass silk ribbon on the outer layer of the polyimide tape, and reserving 150-180mm of the alkali-free glass silk for tightening and fixing after tying; then tying at least 3 layers with polyimide tape on the outer layer of the alkali-free glass silk, and make the outermost layer of the polyimide tape cover the alkali-free glass silk.

[0012] In some embodiments, the coil leads are arranged in a wave shape and fixed on the secondary skeleton, specifically including: before connecting various types of coil wires and the coil leads of the aviation plug, the coil leads are first extended from the aviation plug to the coil wire to be connected and pre-fixed on the secondary skeleton, and the pre-fixed position is at the crests and troughs of the wave shape; after the connecting terminal is fixed on the secondary skeleton, the coil wires and the coil leads at both ends of the connecting terminal are distributed along the wave shape, the spacing between the crests and troughs of the wave shape is adjusted, and the adjusted wavy coil leads and the wavy coil wires are tied and fixed.

[0013] In some embodiments, the spacing between the crests and troughs of the wavy coil lead is at least 60 mm; the wavy coil wire extends axially along the secondary skeleton, and the spacing between the crests and troughs of the wavy coil wire is at least 20 mm.

[0014] In some embodiments, the coil wires between adjacent coils of the same type are connected, and the insulation layers at the ends of the two coil wires that need to be connected are removed, specifically including: removing 35-45 mm of the insulation layers at the ends of the two coil wires that need to be connected and then folding them in half.

[0015] In some embodiments, forming a docking point between two of the coil conductors specifically includes: crossing the two coil conductors that are folded in half after removing the insulation layer into an X shape and then winding them at least 3 times, and winding the tails at both ends remaining after winding perpendicularly on the busbar respectively, and winding the remaining tails relative to the busbar at least 3 times.

[0016] In some embodiments, the docking points are welded and fixed on the secondary skeleton, specifically comprising: welding the winding parts of the two coil conductors by using brazing equipment; spraying insulating paint on the docking points of the two coil conductors after welding, and air-drying the insulating paint; sleeved with a silicone paint sleeve on the docking points after the insulating paint is air-dried, and fixing the docking points sleeved with the silicone paint sleeve on the secondary skeleton.

[0017] In some embodiments, the docking point of the sleeved silicone paint sleeve is fixed on the secondary skeleton, specifically comprising: first fixing the two ends of the docking point with a circle of polyimide tape; then wrapping the polyimide tape from the first end of the docking point to the second end of the docking point with at least 3 layers of half-wrap; then wrapping the alkali-free glass fiber with at least 3 layers of half-wrap on the outer layer of the polyimide tape; then wrapping the polyimide tape with at least 3 layers of half-wrap on the outer layer of the alkali-free glass fiber, and making the outermost layer of the polyimide tape cover the alkali-free glass fiber.

[0018] In some embodiments, before the docking point of the sleeved silicone paint sleeve is fixed on the secondary frame, the coil wires at both ends of the docking point are distributed in a wavy shape, and the spacing between the crests and troughs of the wavy coil wires is at least 20 mm.

[0019] The coil wire docking method provided by the present application removes the insulation layer of the coil wire ends that need to be connected between adjacent coils of the same type, then folds the two coil wires after the insulation layer is removed in half and cross-wraps them to form a docking point, then welds the docking point and fixes the docking point on the secondary skeleton. Through a tensile test, it can be obtained that the connection method of removing the insulation layer of the two coil wires, folding them in half, cross-wraps them and welding them enables the two ends of the docking point of the two coil wires to withstand stronger thermal stress, thereby improving the connection strength between the coil wires and the coil wires; after removing the insulation layer of both ends of the coil wires of each type 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 connecting terminal to form a first connection point and a second connection point, and the first connection point and the second connection point are respectively welded, and the welded connecting terminal is fixed to the secondary skeleton. The invention relates to a method for docking coil wires and coil leads on a frame, and the coil wires are docked with each other through connecting terminals, and the connecting terminals are used to bear the tension between the coil wires and the coil leads, thereby improving the connection strength between the coil wires and the coil leads; and the coil leads are fixed to the secondary frame in a wavy shape along the axial direction of the secondary frame, so that during the operation of the detector, when the secondary frame expands due to the thermal environment, the wavy coil leads can have a deformation amount that follows the deformation of the secondary frame, thereby reducing the tension on the connection between the coil leads and the coil wires due to the expansion of the secondary frame, and further improving the connection strength between the coil leads and the coil wires. In this way, through the method for docking coil wires provided in the embodiment of the present application, the connection strength between the coil wires and the coil wires, and between the coil wires and the coil leads is improved, the wire breakage failure at the connection is reduced, and the stability of the detector operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a coil connection method on a secondary frame provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the connection terminal provided in the embodiment of the present application; Figure 3A schematic diagram of connecting the coil wire and coil lead wire to the connection terminal provided in an embodiment of the present application; Figure 4 A schematic diagram of the connection between coil wires and coil wires provided in an embodiment of the present application; wherein, Figure 4 a is a schematic diagram of the first step of connecting the coil wires provided in an embodiment of the present application; Figure 4 b is a schematic diagram of the second step of connecting the coil wires provided in the embodiment of the present application; Figure 4 c is a schematic diagram of the third step of connecting coil wires provided in an embodiment of the present application.

[0022] Description of reference numerals: 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 frame; 100-A coil, 200-B coil, 300-C coil, 400-D coil, 500-E coil, 600-auxiliary coil. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0025] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular 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 some other embodiments", "in some other embodiments", etc. that appear at 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 "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0026] 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, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0027] At present, the coil wires of the reactor control rod position detector are usually terminated by cold pressure welding. The cross-sections of the two coil wires to be connected are aligned and then directly pressed together. If there are impurities in the cross-section of the coil wire or the crimping tool is aged, the crimping quality will be poor, which makes it easy to cause wire breakage failure when the temperature changes greatly, and the connection strength between the coil wires is poor. When connecting the coil wire and the coil lead, the coil wire is usually wrapped around the coil lead for many times and fixed by hot melting, so that the joint between the coil wire and the coil lead will produce fatigue wire breakage failure under repeated thermal stress. In addition, due to the thermal expansion of the secondary skeleton during the operation of the detection rod, the two ends of the joint between the coil lead and the coil wire will be subjected to tension, further increasing the risk of wire breakage failure and affecting the detection operation of the detector.

[0028] A coil wire docking method provided in an embodiment of the present application includes:

[0029] S1, connecting coil wire 1 and coil wire 1 between adjacent coils of the same type;

[0030] like Figure 1 As shown, a slot for winding a coil is provided on the secondary frame 5, and a coil is formed by winding a copper wire in the slot. On one secondary frame 5, auxiliary coils are arranged at both ends, and A / B / C / D / E coils, and the corresponding number of A / B / C / D / E coils is 16 / 8 / 4 / 2 / 1, and they are arranged in a certain order on the secondary frame 5.

[0031] It is necessary to connect the coils of the same type through the reserved coil wire 1, such as Figure 1As shown, 16 A coils are connected to each other, 8 B coils are connected to each other, 4 C coils are connected to each other, 2 D coils are connected to each other, and the auxiliary coils at both ends are connected to each other (not shown in the figure).

[0032] It should be noted that in actual situations, the A\B\C\D\E coils are interlaced with each other. Figure 1 For ease of understanding, coils of the same type are illustrated as being distributed together, and may be arranged and distributed according to actual conditions, and are not limited to this in the embodiments of the present application.

[0033] S11, removing the insulation layers at the ends of the two coil wires 1 to be connected;

[0034] The insulation layer of the ends of the two coil conductors 1 to be butt-jointed is removed 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 the ends of the coil conductors 1 are butt-jointed.

[0035] S12, butting the two coil conductors 1 after removing the insulation layer;

[0036] like Figure 4 As shown in a, first, the ends of the two coil conductors 1 after removing the insulation layer are crossed into an X shape, and then wound at least 3 times to improve the connection strength, forming a Figure 4 b's winding point, and then Figure 4 The tails of the two ends remaining after winding as shown in b are respectively wound vertically on the busbar, and the remaining tails are wound at least 3 times relative to the busbar to form a Figure 4 c is the butt joint of the two coil conductors 1.

[0037] S13, welding the butt joints of the two coil conductors 1;

[0038] Use an electric soldering iron, tin-lead-silver brazing wire, and rosin to weld and fix the butt joints of the two coil conductors 1; then spray the welded butt joints with 1053 insulating paint, and use a hair dryer to air-dry until the insulating paint does not flow or drip, then spray it again with 1053 insulating paint, and use a hair dryer to air-dry again to ensure that the winding parts of the two coil conductors 1 are covered with insulating paint.

[0039] S14, fixing the docking point on the secondary frame 5;

[0040] A silicone paint sleeve is sleeved at the docking point, and the docking point where the silicone paint sleeve is sleeved is fixed on the secondary frame 5;

[0041] The coil wires 1 at both ends of the docking point are distributed in a wave shape, and the wave shape extends along the axial direction of the secondary frame 5, and the distance between the wave crest and the wave trough of the wave-shaped coil wire 1 is ensured to be at least 20 mm, so that when the secondary frame 5 is heated and expanded, the coil wires 1 at both ends of the docking point have a deformation amount, so as to reduce the tension generated by the expansion of the secondary frame 5 on the coil wires 1 at both ends of the docking point, so as to enhance the connection strength between the coil wires 1 and the coil wires 1;

[0042] First, use 5mm wide polyimide tape to fix a circle at both ends of the docking point;

[0043] Afterwards, the polyimide tape is used to wrap from the first end of the docking point and 10 mm away from the first end, and half-wrap is used to wrap at least 3 layers, and then wrapped to 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 resistance to high temperature and radiation, and can be better applied to reactor operations. In this way, the first layer of polyimide tape is used to first fix the docking point and enhance the insulation at the docking point;

[0044] After that, the outer layer of the polyimide tape of the first layer is half-wrapped with alkali-free glass yarn for at least 3 layers. 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 be deformed when the secondary skeleton 5 expands due to heat, it is avoided that all of them are tied too tightly with polyimide tape, and fixed with alkali-free glass yarn to provide deformation space for the coil wire 1;

[0045] Afterwards, half-wrap the outer layer of the alkali-free glass yarn with polyimide tape for at least 3 layers, and make the outermost layer of polyimide tape cover the alkali-free glass yarn to ensure that the alkali-free glass yarn does not loosen, further ensure the insulation of the docking point, and improve wear resistance.

[0046] It should be noted that the half-fold wrap is half the width of the previous circle pressed by the latter circle, and so on, to ensure that the docking point can be fully wrapped and covered, and to ensure the strength and insulation of the wrapping of the docking point.

[0047] In actual situations, since the length of the coil wire 1 reserved for docking of each coil is different, if the docking length is insufficient, additional wires need to be added to directly dock the two coil wires 1. Therefore, on the premise that the wave shape of the coil wire 1 at both ends of the docking point has sufficient deformation, the increase of docking points between the wires should be avoided as much as possible to improve the connection strength between the coil wires 1.

[0048] A tension test was performed on the docking point after the coil conductor 1 and the coil conductor 1 were docked using the docking method provided by the embodiment of the present application. Table 1 shows the tension test data of the coil conductor docking point;

[0049] Table 1 Coil wire joint tensile test data

[0050]

[0051] It can be seen from the breaking force data of the 1st to the 10th groups in Table 1 that in the breaking test of the docking point formed by the docking method of the coil wire 1 and the coil wire 1 provided in the embodiment of the present application, the average breaking force is 7.66N, and the minimum breaking force is 6.8N; according to the prior art, the breaking force range of the coil wire 1 and the coil wire 1 after docking by cold pressure welding is 1.4-5.7N. It can be seen that the docking point formed by the direct docking method of the coil wire 1 and the coil wire 1 provided in 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 failure during the operation of the detector.

[0052] S2, connecting the coil wire 1 of each type of coil and the coil lead 2 of the aviation plug 4;

[0053] like Figure 1 As shown, after the same type of coil wires 1 are connected, the coil leads 2 need to be led out from the aviation plug 4 and connected 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 covered with the secondary frame 5. Figure 1 Only the relative positions of the aviation plug 4 and the secondary frame 5 are shown in the figure, and the gap between the outer cylinder and the secondary frame 5 is small and will not affect the connection of the coil lead 2.

[0054] S21, extending the coil lead 2 from the aviation plug 4 to the coil wire 1 to be connected in a wave shape, and pre-fixing the coil lead 2 on the secondary frame 5;

[0055] Since there is a certain distance between the coil lead 2 and the coil conductor 1 to be connected, a polyimide tape is used to wrap around the crests and troughs of the wavy coil lead 2 for pre-fixation to ensure that the wavy shape of the coil lead 2 is not deformed during the process of connecting the coil lead 2 with the coil conductor 1.

[0056] S22, removing the insulation layer at the end of the coil wire 1 and the insulation layer at the end of the coil lead wire 2 to be connected;

[0057] Fold the end of the coil wire 1 to be connected by 100-150 mm to increase the subsequent connection strength between the coil wire 1 and the connection terminal, and remove 20-30 mm, preferably 25 mm, of the insulation layer at the end of the folded coil wire 1;

[0058] Remove 20-30 mm of insulation layer from the end of the coil lead wire 2 to be connected, preferably 25 mm.

[0059] S23, connecting the coil conductor 1 and the coil lead 2 after the insulation layer is removed by using the connection terminal 3;

[0060] like Figure 2-Figure 3 As 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 that are arranged oppositely. To ensure connection transmission, the connection terminal 3 is a copper terminal;

[0061] The coil wire 1 after being folded in half and having its insulation layer removed is twisted into a twist shape, passed through the first connection hole 31 from the first side of the connection terminal 3, and wound 2-3 times around the first end of the connection terminal 3 to form a first connection point, so as to improve the connection strength between the coil wire 1 and the connection terminal 3;

[0062] The coil lead wire 2 after removing the insulating layer is passed through the second connection hole 32 from the first side of the connection terminal 3, and is wound 5-10 times at the second end of the connection terminal 3 to form a second connection point. Since the coil lead wire 2 is thicker than the coil conductor 1, the connection strength between the coil lead wire 2 and the connection terminal 3 is improved by increasing the number of winding turns of the coil lead wire 2 and the connection terminal 3, while avoiding winding too many turns to ensure that the resistance of the second connection point formed after the coil lead wire 2 is connected to the connection terminal 3 is not higher than the self resistance;

[0063] It should be noted that the coil wire 1 and the coil lead 2 must be inserted into the connecting terminal 3 on the same side of the connecting terminal 3 to reduce wear on the coil wire 1 and the coil lead 2 when the connecting terminal 3 is subsequently fixed to the secondary frame 5.

[0064] S24, welding connection terminal 3;

[0065] Use an electric soldering iron, tin-lead-silver soldering wire, or rosin solder to solder the first connection point and the second connection point respectively, so that the winding of the coil wire 1 and the connection terminal 3 and the winding of the coil lead wire 2 and the connection terminal 3 are both soldered to the connection terminal 3;

[0066] Use 1053 insulating paint to spray the welded connecting terminal 3, the first connecting point and the second connecting point, and use a hair dryer to air-dry them until they do not flow or drip. Then, spray them again with 1053 insulating paint and air-dry them again to ensure that the connecting terminal 3 and the first connecting point and the second connecting point are covered with insulating paint.

[0067] S25, fixing the connection terminal 3 on the secondary frame 5;

[0068] First, the second side of the connecting terminal 3 is fitted with the secondary skeleton 5 to ensure that the coil wire 1 and the coil lead 2 are inserted from the first side of the connecting 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 failure; and the length direction of the connecting terminal 3 is extended along the axial direction of the secondary skeleton 5, so as to reduce the pulling force on the coil wire 1 and the coil lead 2 at both ends of the connecting terminal 3 due to the expansion of the secondary skeleton 5 during the operation of the detector, and further reduce the occurrence of wire breakage failure;

[0069] The connecting terminal 3 is fixed to the secondary frame 5 through the mounting hole 33 of the connecting terminal 3 by means of threaded fasteners and gaskets, and the coil wires 1 and coil leads 2 at both ends of the connecting terminal 3 are distributed in a wave shape along the axial direction of the secondary frame 5;

[0070] The spacing between the wave crests and troughs of the coil conductor 1 is at least 20 mm, and the spacing between the wave crests and troughs of the coil lead 2 is at least 60 mm, so that during the thermal expansion of the secondary skeleton caused by the operation of the detector, both the coil conductor 1 and the coil lead 2 have deformation, reducing the tension on the coil conductor 1 and the coil lead 2 at both ends of the connecting terminal 3, improving the connection strength between the coil conductor 1 and the coil lead 2, and reducing the occurrence of wire breakage failures.

[0071] S25, binding the connection terminal 3;

[0072] Binding the coil lead wire 2 from the first connection point between the connection terminal 3 and the coil conductor 1;

[0073] First, use a polyimide tape with a width of 80-120 mm to tie at least 3 layers, so that the first layer of polyimide tape first fixes the connection terminal 3 and enhances the insulation at the connection terminal 3;

[0074] After that, use alkali-free glass yarn to half-wrap at least 3 layers of the outer layer of the first layer of polyimide tape, and reserve 150-180mm of alkali-free glass yarn to tighten and fix after binding. 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 be deformed when the secondary skeleton 5 expands due to heat, it is avoided that all of them are tied too tightly with polyimide tape, and fixed with alkali-free glass yarn to provide deformation space for the coil wire 1 and the coil lead 2;

[0075] Afterwards, half-wrap the outer layer of the alkali-free glass yarn with polyimide tape for at least 3 layers, and make the outermost layer of polyimide tape cover the alkali-free glass yarn to ensure that the alkali-free glass yarn does not loosen, further ensure the insulation of the docking point, and improve wear resistance.

[0076] 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.

[0077] 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 coil wire docking method, characterized in that: include: Connecting coil wires between adjacent coils of the same type, and removing insulation layers from ends of two coil wires that need to be connected; After removing the insulating layer, the two coil conductors are folded in half and then cross-wound to form a butt joint of the two coil conductors; Welding the docking points and fixing the docking points on the secondary frame; Connect the coil wires of various types of coils with the coil leads of the aviation plug, and remove the insulation layer of the ends of the coil wires and the ends of the coil leads that need to be connected; The coil wire after the insulation layer is removed is wound around the first end of the connection terminal to form a first connection point, and the coil lead wire after the insulation layer is removed is wound around the second end of the connection terminal to form a second connection point; Welding the first connection point and the second connection point respectively, and fixing the connection terminal on the secondary frame; The coil lead wire is arranged in a wave shape and fixed on the secondary frame, and the wave shape extends along the axial direction of the secondary frame.

2. The coil conductor butt connection method according to claim 1, characterized in that: Remove the insulation layer at the end of the coil wire to be connected and the insulation layer at the end of the coil lead wire, specifically including: Fold the end of the coil wire to be connected by 100-150 mm, and remove 20-30 mm of the insulation layer of the end of the folded coil wire; Remove 20-30 mm of the insulation layer from the end of the coil lead wire to be connected.

3. The coil conductor docking method according to claim 2, characterized in that: The connecting terminal comprises a first connecting hole, a second connecting hole and a mounting hole, and the connecting terminal comprises a first side and a second side which are arranged opposite to each other; The coil wire after removing the insulation layer is wound around the first end of the connecting terminal to form a first connection point, and the coil lead wire after removing the insulation layer is wound around the second end of the connecting terminal to form a second connection point, specifically comprising: twisting the coil wire after folding in half and removing the insulation layer into a twist shape, inserting it into the first connecting hole from the first side of the connecting terminal, and winding it around the first end of the connecting terminal for 2-3 turns; inserting the coil lead wire after removing the insulation layer from the first side of the connecting terminal into the second connecting hole, and winding it around the second end of the connecting terminal for 5-10 turns.

4. The coil conductor butt connection method according to claim 3, characterized in that: Welding the first connection point and the second connection point respectively and fixing the connection terminal on the secondary frame specifically includes: Using a soldering device to respectively weld the first connection point and the second connection point, so that the winding circle of the coil wire and the connection terminal and the winding circle of the coil lead wire and the connection terminal are both welded to the connection terminal; Spraying insulating paint on the welded connection terminal, the first connection point and the second connection point, and air-drying the insulating paint; The connecting terminal is fixed to the secondary frame through the mounting hole and the threaded fastener, so that the second side of the connecting terminal is in contact with the secondary frame, and the length direction of the connecting terminal is arranged along the axial extension of the secondary frame.

5. The coil conductor butt connection method according to claim 4, characterized in that: The connecting terminal fixed on the secondary frame is bound and fixed, and the first connection point and the second connection point are bound to the coil lead end, specifically including: Use polyimide tape to tie at least 3 layers; then use alkali-free glass silk ribbon to tie at least 3 layers on the outer layer of the polyimide tape, and reserve 150-180mm of the alkali-free glass silk to tighten and fix after tying; then use polyimide tape to tie at least 3 layers on the outer layer of the alkali-free glass silk, and make the outermost layer of the polyimide tape cover the alkali-free glass silk.

6. The coil conductor butt connection method according to claim 1, characterized in that: Arranging the coil leads in a wave shape and fixing them on the secondary frame specifically includes: Before connecting various types of coil wires to the coil leads of the aviation plug, the coil leads are first extended from the aviation plug to the coil wires to be connected and pre-fixed on the secondary frame, with the pre-fixed positions being at the crests and troughs of the wave shape; After the connecting terminal is fixed on the secondary frame, the coil wire and the coil lead at both ends of the connecting terminal are distributed along the wave shape, the spacing between the wave crests and troughs of the wave shape is adjusted, and the adjusted wave-shaped coil lead and the wave-shaped coil wire are tied and fixed.

7. The coil conductor butt connection method according to claim 6, characterized in that: The spacing between the crest and trough of the wavy coil lead is at least 60 mm; The wavy coil conductor extends along the axial direction of the secondary frame, and the spacing between the wave crest and the wave trough of the wavy coil conductor is at least 20 mm.

8. The coil conductor butt connection method according to claim 1, characterized in that: Connect the coil wires between adjacent coils of the same type and remove the insulation layer at the ends of the two coil wires that need to be connected, specifically including: The insulation layers of the ends of the two coil conductors to be butt-jointed are removed by 35-45 mm and then folded in half.

9. The coil conductor butt connection method according to claim 8, characterized in that: Forming a docking point of two coil conductors specifically includes: The two coil wires folded in half after removing the insulating layer are crossed into an X shape and then wound at least 3 times, and the tails at both ends remaining after winding are respectively wound vertically on the busbar, and the remaining tails are wound at least 3 times relative to the busbar.

10. The coil conductor butt connection method according to claim 9, characterized in that: Welding the docking point and fixing the docking point on the secondary frame specifically includes: Using a brazing device to weld the winding parts of the two coil conductors; Spraying insulating paint on the butt joint of the two coil conductors after welding, and air-drying the insulating paint; After the insulating paint is air-dried, an organic silicon paint sleeve is sleeved on the docking point, and the docking point sleeved with the organic silicon paint sleeve is fixed on the secondary frame.

11. The coil conductor butt connection method according to claim 10, characterized in that: Fixing the docking point of the sleeved silicone paint sleeve on the secondary frame specifically includes: First, use polyimide tape to fix one circle at both ends of the docking point; Then, a polyimide tape is used to wrap at least three layers from the first end of the docking point to the second end of the docking point; Then, half-wrap at least 3 layers of alkali-free glass yarn around the outer layer of the polyimide tape; Then, the polyimide tape is half-wrapped with at least three layers to be wound around the outer layer of the alkali-free glass yarn, and the outermost layer of the polyimide tape covers the alkali-free glass yarn.

12. The coil conductor butt connection method according to claim 10, characterized in that: Before the docking point of the sleeved silicone paint sleeve is fixed on the secondary frame, the coil wires at both ends of the docking point are distributed in a wave shape, and the spacing between the crest and the trough of the wave-shaped coil wire is at least 20 mm.

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