Water cooling pipe and induction coil combined type electric reactor

Abstract

The utility model relates to the field of electric power, in particular to a reactor technology. A water-cooled tube and induction coil combined reactor comprises two annular iron cores arranged side by side and induction windings arranged in through holes of the two annular iron cores in a surrounding mode, and the induction windings at least comprise two sets of coils. Hollow copper pipes are adopted as wires of the two groups of coils, and insulating cloth is wound outside the copper pipes; one coil is provided with two taps, and the taps are connected with wiring terminals; the wiring terminal adopts a copper bar, and the copper bar is fixedly connected to the copper pipe at the tap; the two tail ends of the copper pipe are opened and are connected with water pipe connectors; the annular iron core adopts an iron core formed by overlapping silicon steel sheets; an insulating layer is coated outside the annular iron core, a binding steel belt is wound outside the insulating layer, and the annular iron core is locked by the binding steel belt; the two ends of the binding steel belt are wrapped outside the insulating layer and are in butt joint with each other; the butt joint position of the two ends of the bundling steel belt is locked through a locking bolt.

Description

TECHNICAL FIELD

[0001] The utility model relates to the electric power field, concretely relates to electric reactor technology. BACKGROUND

[0002] Electric reactor is widely used in electric power field because of its functions of limiting system short-circuit current, compensating capacitance current, etc. With the continuous increase of power system capacity and switching frequency, the loss of electric reactor increases significantly, which causes a large amount of heat generated when the electric reactor works. The generated heat will change the air gap spacing of the electric reactor, which will further affect the inductance of the electric reactor and cause large output voltage fluctuation. Therefore, how to cool the electric reactor has become a problem of concern in the industry.

[0003] In some related technologies, a water-cooled radiator is arranged around or inside the coil winding of the electric reactor to conduct the heat generated by the coil winding to the water-cooled radiator, and the above heat is taken away by the cooling water circulating in the water-cooled radiator, so as to achieve the purpose of heat dissipation. However, the water-cooled radiator has limited heat dissipation efficiency and is difficult to meet the heat dissipation needs of high-power-density coil winding. Moreover, in the actual installation of the water-cooled radiator, the water-cooled radiator is limited by the arrangement of the iron core and is difficult to cover all parts of the coil winding, which may cause local hot spot phenomenon and affect the stable operation of the electric reactor. SUMMARY

[0004] The utility model aims at providing a water-cooled tube induction coil combined electric reactor to solve at least one of the above technical problems.

[0005] The technical problem solved by the utility model can be solved by the following technical solutions:

[0006] The water-cooled tube induction coil combined electric reactor comprises two annular iron cores arranged side by side and induction windings arranged around the through holes of the two annular iron cores. The induction windings comprise at least two groups of coils, and the two groups of coils are integrally cast.

[0007] The wires of the two groups of coils are hollow copper pipes, and the copper pipes are wrapped with insulating cloth.

[0008] One of the coils has two taps, and the taps are connected with terminal connectors.

[0009] The terminal connectors are copper bars, which are fixedly connected to the copper pipes at the taps.

[0010] The two ends of the copper pipes are open and connected with water pipe joints.

[0011] The annular iron cores are iron cores composed of silicon steel sheets.

[0012] The ring-shaped iron core is covered with an insulating layer outside, and the insulating layer is wrapped with a steel band outside, and the two ends of the steel band are locked.

[0013] The two ends of the steel band are wrapped outside the insulating layer and are butt-jointed.

[0014] The butt-jointed ends of the two ends of the steel band are locked by lock bolts.

[0015] In the above design, the winding wire of the induction coil adopts a hollow copper pipe, and the two ends of the copper pipe are connected with water pipe joints. When the reactor is working, the water pipe joints are connected with cooling water for heat dissipation. The beneficial effect is that the copper pipe wire is directly used as a water-cooled radiator, and the heat dissipation efficiency is improved. The steel band is wrapped outside the insulating layer of the silicon steel sheet core, which can ensure that the precision of the air gap will not change, and the beneficial effect is that the inductance of the reactor is stabilized, and the output voltage fluctuation of the reactor is reduced.

[0016] The induction winding includes at least two groups of coils, and each group of coils has a terminal, which can be connected in series or parallel structure, and the two groups of coils are respectively introduced into cooling water, so that the induction winding can be cooled more quickly and uniformly.

[0017] Further, the water pipe joint includes a connecting pipe and a joint.

[0018] The center hole of the connecting pipe is adapted to the shape of the copper pipe, one end of the connecting pipe is sleeved on the copper pipe, and the joint between the sleeve and the copper pipe is welded and sealed.

[0019] The other end of the connecting pipe is closed.

[0020] The side wall of the connecting pipe is provided with a joint for communicating cooling water.

[0021] In the above design, the water pipe joint of the winding copper pipe wire adopts a side water passing mode, which is better than passing water from the top of the copper pipe. The beneficial effect is that the water pipe is prevented from being blocked due to bending, which affects the flow of cooling water.

[0022] Further, the copper bar and the copper pipe are connected by welding.

[0023] In the above design, the copper bar and the copper pipe are connected by welding, which can reduce the resistance of the connection and prevent heating due to resistance.

[0024] Further, the copper pipe adopts a square copper pipe.

[0025] In the design, the copper pipe adopts a square copper pipe, which has the beneficial effects that: first, the square copper pipe can have a larger adhering surface with the copper bar and is easier to be welded more firmly; second, when the square copper pipe is wound into a coil, the gap between the copper pipes is smaller, and the volume of the wound coil is more compact.

[0026] Further, the steel band includes a steel band, a steel strip and locking bolts;

[0027] The butt joints of the two ends of the steel band are rolled into two cylinders, the steel strip is passed through the two cylinders, the steel band is pulled, bolt holes are arranged at the two ends of the steel strip, and the locking bolts are passed through the bolt holes on the steel strip in the two cylinders to pull and lock the steel band.

[0028] In the design, the steel band is used to bundle the core formed by the laminated silicon steel sheets, which has the beneficial effects that: first, the steel band is used for bundling, which can improve the fastening and protection of the core; second, the steel band has a simple structure and low manufacturing cost.

[0029] Further, the upper and lower clamping plates arranged around the induction winding are in the shape of a cross, and the upper and lower clamping plates are provided with insulating lining plates on the inner side of the ring-shaped core.

[0030] The upper and lower clamping plates are locked by at least four bolts, and the upper ends of the at least four bolts are fixedly connected with lifting rings.

[0031] In the design, the upper and lower clamping plates in the shape of a cross clamp the two ring-shaped cores arranged side by side, and the upper and lower clamping plates are locked by four bolts, which has the beneficial effects that: the structure for clamping and fixing the two ring-shaped cores arranged side by side is simple, and the manufacturing cost is reduced; the lifting rings are fixedly connected to the upper ends of the bolts, which has the beneficial effect of facilitating hoisting and installation.

[0032] Further, the induction winding is composed of two groups of coils, and the two groups of coils are alternately wound and combined.

[0033] In the design, the two groups of coils are alternately wound and combined, which has the effect of flexibly connecting to form a series structure or a parallel structure.

[0034] In the utility model, the copper pipe of the winding conductor adopts a hollow copper pipe, and cooling water is directly passed into the hollow copper pipe for heat dissipation, which has the beneficial effects that: the copper pipe conductor is directly used as a water-cooled radiator, which saves an additional water-cooled radiator, simplifies the heat dissipation system on the one hand and reduces the manufacturing cost on the other hand; on the other hand, the heat dissipation efficiency is enhanced, and the ability of the electric reactor to work stably is improved.

[0035] The utility model discloses a core adopts silicon steel sheet lamination, and adopts steel band bundling in the outermost layer of core, and its beneficial effect lies in, the fastening of silicon steel sheet superposition is strengthened, the air gap change of core is reduced, the inductance of the electric reactor is stabilized, the output voltage fluctuation of the electric reactor is prevented, and the ability of the electric reactor stable work is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings. Wherein:

[0037] Figure 1 It is the schematic diagram of the utility model;

[0038] Figure 2 It is the butt joint schematic diagram of the bundling steel band of the utility model.

[0039] Symbol explanation:

[0040] 1, induction coil;2, ring core;3, tap;4, water pipe joint;5, copper bar;6, steel band;7, steel bar. DETAILED DESCRIPTION

[0041] In order to make the above purpose, features and advantages of the utility model more obvious, the following will be combined with the specific embodiment of the utility model detailed description of the drawings.

[0042] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, and the skilled person in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0043] Secondly, the utility model is described in detail in conjunction with the schematic diagram, when detailing the embodiment of the utility model, for the convenience of explanation, the section view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of the utility model protection here. In addition, the three-dimensional spatial dimension of length, width and depth should be included in actual manufacture.

[0044] Thirdly, the "one embodiment" or "embodiment" referred to here means that the specific features, structures or characteristics can be included in at least one implementation of the utility model. "In one embodiment" does not mean the same embodiment in different places in the specification, and is not an embodiment that is independent or selectively excluded from other embodiments.

[0045] Referring to Figure 1 、 Figure 2 As shown in the figure, the water-cooled pipe induction coil combined reactor comprises two parallel arranged annular cores 2 and induction windings arranged around the through holes of the two annular cores 2, the induction windings at least comprising two groups of coils, the two groups of coils being casted into one body;

[0046] The conductive wires of the two groups of coils are all hollow copper pipes, and the copper pipes are wrapped with insulating cloth;

[0047] One of the coils has two taps 3, and the taps 3 are connected with wiring terminals;

[0048] The wiring terminals are copper bars 5, which are fixedly connected to the copper pipes at the taps 3;

[0049] The two ends of the copper pipes are both connected with water pipe joints 4;

[0050] The annular cores 2 are silicon steel sheet laminated cores;

[0051] The annular cores 2 are wrapped with insulating layers, and the insulating layers are wrapped with binding steel bands, and the annular cores 2 are locked by the binding steel bands;

[0052] The two ends of the binding steel bands are wrapped outside the insulating layers and are butt-jointed;

[0053] The butt-jointed places of the two ends of the binding steel bands are locked by locking bolts.

[0054] In the embodiment, the winding conductive wires of the induction coil 1 are hollow copper pipes, the two ends of the copper pipes are connected with water pipe joints 4, and the water pipe joints 4 are connected with cooling water to dissipate heat when the reactor works, which has the beneficial effect of directly using the copper pipe conductive wires as a water-cooled radiator to improve the heat dissipation efficiency. The binding steel bands are wrapped outside the insulating layers of the silicon steel sheet cores, which can ensure that the precision of the air gap does not change, and has the beneficial effect of stabilizing the inductance of the reactor and reducing the output voltage fluctuation of the reactor.

[0055] In the embodiment, the two groups of coils form a series structure through the respective wiring terminals, and then cooling water is introduced into the two copper pipes on the longer coil respectively, so that the cooling of the coil is rapid and uniform.

[0056] In the embodiment, the two groups of coils also allow to form a series structure or a parallel structure through multiple wiring terminals.

[0057] Further, the water pipe joint 4 comprises a connecting pipe and a joint;

[0058] The center hole of the connecting pipe is adapted to the shape of the copper pipe, the connecting pipe is sleeved on one end of the copper pipe, and the joint between the sleeve pipe and the copper pipe is welded and sealed;

[0059] The other end of the connecting pipe is closed;

[0060] The side wall of the connecting pipe is provided with a joint for communicating with cooling water.

[0061] In the embodiment, the water pipe joint 4 of the winding copper pipe wire adopts a side water passing mode, which has the beneficial effect of preventing the water pipe from being blocked due to bending and affecting the flow of cooling water.

[0062] Further, the copper bar 5 and the copper pipe are connected by welding.

[0063] In the embodiment, the copper bar 5 and the copper pipe are connected by welding, which has the beneficial effect of reducing the resistance of the connection and preventing heating due to resistance.

[0064] Referring to Figure 1 As shown in the figure, the copper pipe adopts a square copper pipe.

[0065] In the embodiment, the copper pipe adopts a square copper pipe in cross section, which has the beneficial effects that first, the square copper pipe can have a larger fitting surface with the copper bar and is easier to weld more firmly; second, when the square copper pipe is wound into a coil, the gap between the copper pipes is smaller, and the volume occupied by the wound coil is more compact.

[0066] Referring to Figure 2 As shown in the figure, the binding steel belt includes a steel belt 6, a steel strip 7 and a locking bolt;

[0067] The butt joint at both ends of the steel belt 6 is rolled into two cylinders, the steel strip 7 passes through both cylinders, the steel belt 6 is pulled, bolt holes are arranged at both ends of the steel strip 7, and the locking bolt passes through the bolt holes on the steel strip 7 in both cylinders to pull and lock the steel belt 6.

[0068] In the embodiment, the steel belt is used to bind the iron core formed by the laminated silicon steel sheets, which has the beneficial effects that first, using the steel belt 6 for binding can improve the fastening and protection of the iron core; second, using the steel belt 6 for binding has a simple structure and low manufacturing cost.

[0069] Referring to Figure 1 As shown in the figure, the induction winding is arranged around the upper and lower clamping plates in the shape of a cross, and the upper and lower clamping plates are provided with insulating lining plates on the inner side of the annular iron core 2.

[0070] The upper and lower clamping plates are locked by at least four bolts, and the upper end of the at least four bolts is fixedly connected with a lifting ring.

[0071] In the embodiment, the upper clamping plate and the lower clamping plate are used to clamp the induction winding, and the upper clamping plate and the lower clamping plate are locked through four bolts, which has the beneficial effect that the structure used for clamping and fixing is simple, and the manufacturing cost is reduced.

[0072] In the utility model, the copper pipe of the winding wire adopts a hollow copper pipe, and cooling water is directly passed into the hollow copper pipe for heat dissipation, which has the beneficial effect that the copper pipe wire is directly used as a water-cooled radiator, and the additional water-cooled radiator is saved, which simplifies the heat dissipation system on the one hand and reduces the manufacturing cost on the other hand; on the other hand, the heat dissipation efficiency is enhanced, and the ability of the reactor to stably work is improved.

[0073] Further, the induction winding is composed of two groups of coils, and the two groups of coils are cross-wound and combinedly sleeved, and then integrally cast.

[0074] In the embodiment, the two groups of coils are cross-wound and combinedly sleeved, which has the effect that the series structure or the parallel structure can be flexibly connected.

[0075] In addition, in order to provide a brief description of the exemplary embodiments, all the features of the actual embodiments can not be described, which are not related to the best mode for carrying out the utility model currently considered, or those not related to the implementation of the utility model.

[0076] It should be understood that, in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts can be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development efforts will be a routine work of design, manufacture and production without excessive experiments.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, and they should be covered in the scope of the claims of the utility model.

Claims

1. A water-cooled tube induction coil combined reactor, comprising two annular iron cores arranged side by side, and an induction winding arranged around the through holes of the two annular iron cores, characterized in that: The induction winding includes at least two sets of coils, which are cast into one piece; The conductors of the two sets of coils are hollow copper tubes, which are wrapped with insulating cloth; One of the coils has two taps connected to terminals; The wiring terminal adopts a copper bar, which is fixedly connected to the copper tube at the tap; The two ends of the copper pipe are open and both are connected with water pipe joints; The annular iron core is an iron core laminated with silicon steel sheets; The outer surface of the annular core is covered with an insulating layer, and the outer surface of the insulating layer is wrapped with a binding steel belt, and the annular core is locked by the binding steel belt; The two ends of the strapping steel belt are wrapped around the insulation layer and butt-jointed; The butt joints at both ends of the strapping steel belt are locked by locking bolts.

2. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The water pipe joint includes a connecting pipe and a joint; The center hole of the connecting pipe is adapted to the shape of the copper pipe, one end of the connecting pipe is sleeved on the copper pipe, and the joint between the sleeve and the copper pipe is welded and sealed; The other end of the connecting pipe is closed; The side wall of the connecting pipe is provided with a joint for connecting with cooling water.

3. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The copper busbar and copper pipe are connected by welding.

4. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The copper tube adopts square copper tube.

5. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The steel strapping includes steel straps, steel bars and locking bolts; The butt joints at both ends of the steel strip are rolled into two cylinders, and steel bars are passed through the two cylinders to pull the steel strip. Bolt holes are set at both ends of the steel bar. Locking bolts pass through the bolt holes on the steel bars in the two cylinders, and the steel strip is pulled to lock it.

6. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The induction winding is surrounded by an upper clamping plate and a lower clamping plate in a well shape, and an insulating lining plate is provided on the inner side of the upper clamping plate and the lower clamping plate facing the inner side of the annular iron core; The upper clamping plate and the lower clamping plate are locked by at least four bolts, and upward ends of the at least four bolts are fixedly connected with a lifting ring.

7. The water-cooled tube induction coil combined reactor according to claim 1, characterized in that: The induction winding consists of two groups of coils, and the two groups of coils are interlaced and assembled, and then cast into one piece.

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