CN208433275U - A kind of pouring current transformer - Google Patents

Abstract

The utility model provides a kind of pouring current transformer, including current transformer ontology, pivot flange and Annular insulator；Wherein, pivot flange is supported on one end of current transformer ontology；Annular insulator insulation separates pivot flange and current transformer ontology, and Annular insulator offers threading notch；The inner ring of current transformer ontology, outer ring and the mutual gap of current transformer ontology, pivot flange, Annular insulator are provided with epoxy resin layer, and current transformer ontology, Annular insulator and pivot flange are fixed together by epoxy resin layer.The utility model supports current transformer ontology using pivot flange, the entire circumferential direction of pivot flange and current transformer ontology is fixed together by epoxy resin layer, so the connection area of pivot flange and current transformer ontology is larger, therefore the structural strength of current transformer is improved, to improve the security reliability of operation of power networks.

Description

A kind of pouring current transformer

Technical field

The utility model relates to current transformer technical fields, more specifically to a kind of pouring current transformer.

Background technique

Current transformer is a kind of mutual inductance by electromagnetic induction by a high current scaling transformation at secondary low current Device, also referred to as electromagnetic current transducer.

Pouring current transformer is widely used in DC transmission engineering.Currently, pouring current transformer is being poured During epoxy resin, only support current transformer ontology (i.e. by multiple monomer current transformer groups by being embedded in holding nut At totality), after epoxy resin cure, holding nut and current transformer ontology are poured together.

But the connection area of above-mentioned holding nut and current transformer ontology is smaller, leads to the structure of current transformer Intensity is poor, affects the security reliability of operation of power networks.

In addition, existing pouring current transformer positive can only lift, it has not been convenient to install.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of pouring current transformers, to improve structural strength, To improve the security reliability of operation of power networks.

In order to achieve the above object, the utility model provides the following technical solutions:

A kind of pouring current transformer, including current transformer ontology, further includes:

It is supported on the pivot flange of current transformer ontology one end；

Insulation separates the Annular insulator of the pivot flange Yu the current transformer ontology, and the Annular insulator is opened Equipped with threading notch；

Wherein, the inner ring of the current transformer ontology, outer ring and the current transformer ontology, the supporting methods The mutual gap of blue, the described Annular insulator is provided with epoxy resin layer, and the epoxy resin layer is mutual by the electric current Sensor ontology, the Annular insulator and the pivot flange are fixed together.

Preferably, in above-mentioned pouring current transformer, the Annular insulator includes the multilayer insulation being stacked together Cardboard.

It preferably, further include the mounting flange being connect with the pivot flange in above-mentioned pouring current transformer, it is described It is provided on mounting flange and hangs socket part.

Preferably, in above-mentioned pouring current transformer, the socket part of hanging includes:

It can be realized front handling mobile crane and connect the first of the pouring current transformer and hang socket part；

It can be realized reverse side and hang and connect the second of the pouring current transformer and hang socket part.

Preferably, in above-mentioned pouring current transformer, described first hang socket part for be arranged it is close in the mounting flange The lifting lug of the end face outer ring of the pivot flange；

Described second to hang socket part be the screw thread lifting hole(eyelet) being arranged on the mounting flange.

Preferably, in above-mentioned pouring current transformer, the pivot flange welds on the end face of the mounting flange Multiple attaching nuts are connected to, the mounting flange is provided with multiple connection counterbores, the attaching nut and the connection counterbore one One is accordingly detachably connected by fixing bolt；

Wherein, the epoxy resin layer is wrapped on the outside of the attaching nut, and by the attaching nut and the support Flange is fixed together.

Preferably, in above-mentioned pouring current transformer, the attaching nut is distributed on the pivot flange along two circles, And the attaching nut for being located at inner ring is staggered with the attaching nut for being located at outer ring.

Preferably, in above-mentioned pouring current transformer, the pivot flange and the mounting flange are aluminium flange.

Preferably, in above-mentioned pouring current transformer, the current transformer ontology includes:

The multiple monomer current transformers stacked along axial direction, the monomer current transformer are coaxial with the pivot flange Line；

One termination positive terminal, the primary line of another termination earthing rod, the primary line is from the monomer current transformer Inner hole passes through, and is pierced by from the threading notch, and the epoxy resin layer is wrapped on the outside of the primary line, the positive terminal and institute It states earthing rod to be arranged on the epoxy resin layer, ground line is provided on the earthing rod.

Preferably, in above-mentioned pouring current transformer, the monomer current transformer includes that monomer measurement grade electric current is mutual Sensor and monomer transient protection grade current transformer；

The monomer transient protection grade current transformer includes:

The transient protection grade iron core of circular ring shape, the radial cut of the transient protection grade iron core are made of high saturation silicon-steel sheet coiled Air gap is cut；

The enamel insulated round copper wire being wound on the transient protection grade iron core, the both ends outlet of the enamel insulated round copper wire pass through soft Copper stranded conductor is drawn, and is respectively welded on the first binding post and the second binding post, first binding post and second wiring Column is arranged on the epoxy resin layer；

The monomer measures grade current transformer

The measurement grade iron core that inside is formed filled with the almag shield box of Superfine crystal material.

It can be seen from the above technical scheme that pouring current transformer provided by the utility model includes Current Mutual Inductance Device ontology, pivot flange and Annular insulator；Wherein, pivot flange is supported on one end of current transformer ontology；Annular insulation Part insulation separates pivot flange and current transformer ontology, and Annular insulator offers threading notch；Current transformer ontology Inner ring, outer ring and the mutual gap of current transformer ontology, pivot flange, Annular insulator are provided with epoxy resin Current transformer ontology, Annular insulator and pivot flange are fixed together by layer, epoxy resin layer.

The utility model supports current transformer ontology using pivot flange, and pivot flange is whole with current transformer ontology A circumferential direction is fixed together by epoxy resin layer, thus the connection area of pivot flange and current transformer ontology compared with Greatly, therefore the structural strength of current transformer is improved, to improve the security reliability of operation of power networks.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also Other drawings may be obtained according to these drawings without any creative labor.

Fig. 1 is the main view of pouring current transformer provided by the embodiment of the utility model；

Fig. 2 is the top view of pouring current transformer provided by the embodiment of the utility model；

Fig. 3 is the structural schematic diagram of transient protection grade iron core provided by the embodiment of the utility model；

Fig. 4 is the structural schematic diagram of transient protection grade current transformer provided by the embodiment of the utility model；

Fig. 5 is the main view of pivot flange provided by the embodiment of the utility model；

Fig. 6 is the top view of pivot flange provided by the embodiment of the utility model；

Fig. 7 is the main view of mounting flange provided by the embodiment of the utility model；

Fig. 8 is the top view of mounting flange provided by the embodiment of the utility model.

Specific embodiment

The utility model embodiment provides a kind of pouring current transformer, improves structural strength, to improve The security reliability of operation of power networks.

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Attached drawing 1-8 is please referred to, pouring current transformer provided by the embodiment of the utility model includes current transformer sheet Body, pivot flange 4 and Annular insulator；Wherein, pivot flange 4 is supported on one end of current transformer ontology；Annular insulator Insulation separates pivot flange 4 and current transformer ontology, and Annular insulator offers threading notch；Current transformer ontology it is interior It encloses, the gap that outer ring and current transformer ontology, pivot flange 4, Annular insulator are mutual is provided with epoxy resin Layer 9, current transformer ontology, Annular insulator and pivot flange 4 are fixed together by epoxy resin layer 9.

It should be noted that matching since current transformer ontology is annular, pivot flange 4 is also annular.

The utility model supports current transformer ontology, pivot flange 4 and current transformer ontology using pivot flange 4 The entire circumferential epoxy resin layer 9 that passes through is fixed together, so the joint face of pivot flange 4 and current transformer ontology Product is larger, therefore improves the structural strength of current transformer, to improve the security reliability of operation of power networks.

Preferably, Annular insulator includes the multilayer insulation cardboard 5 being stacked together.Specifically, insulating board 5 uses two Layer acts insulate and connect pivot flange 4 and current transformer ontology；Insulating board 5 is provided with the threading that width is 6mm Notch.It should be noted that insulating board 5, pivot flange 4, the inner ring of current transformer ontology, outer ring are aligned, it is mutually folded It puts together, bonding strength is more preferable.5 lighter weight of insulating board, cost is relatively low, and alternatively, Annular insulator can also be Epoxy plate or other can play the structure of insulation effect.

For the ease of lifting, pouring current transformer further includes the mounting flange 1 connecting with pivot flange 4, fixation It is provided on orchid 1 and hangs socket part.

The present embodiment hangs socket part by mounting flange 1, and whole pouring current transformer lifting is got up, socket part is hung Setting on the unconnected mounting flange 1 of epoxy resin layer 9, it is easy to process.The utility model can also be such that pivot flange 4 has There is the flange for protruding from epoxy resin layer 9, socket part is hung in processing on flange, to realize the effect being similarly easy to lift, this reality It is not specifically limited in this embodiment with novel.

Preferably, hanging socket part includes that can be realized front handling mobile crane and connect the first of pouring current transformer to hang socket part；It can be real Existing reverse side, which is hung, to be connect the second of pouring current transformer and hangs socket part.The utility model, which can hang socket part front handling mobile crane by first and connect, to be poured Note formula current transformer, hangs socket part reverse side by second and hangs and connect pouring current transformer, so that it is mutual to realize cast-type electric current The two-sided of sensor hangs, and is easily installed.

In further technical solution, first to hang socket part be the end face outer ring that mounting flange 1 is arranged in close to pivot flange 4 Lifting lug 12；Second to hang socket part be the screw thread lifting hole(eyelet) 11 being arranged on mounting flange 1.Screw thread lifting hole(eyelet) 11 is specially M16 screw hole.

As shown in Fig. 2,7,8, it is provided with lifting hole(eyelet) on lifting lug 12, when front handling mobile crane connects, the suspension hook of hanging apparatus is made to penetrate lifting hole(eyelet) It is interior, it can be realized to hang and connect installation.

Reverse side is hung when connecing, and is packed into and is revoked in the screw thread lifting hole(eyelet) 11 on mounting flange 1, revokes with lifting hole(eyelet), and lifting is filled The suspension hook set penetrates in lifting hole(eyelet), can be realized to hang and connects installation, convenient for operation.

The utility model makes to revoke disengaging screw thread lifting hole(eyelet) 11, avoids influencing mounting flange 1 when lifting without reverse side Installation.

It is understood that above-mentioned two socket part of hanging can also be other structures, such as lifting screw, the utility model pair This is not specifically limited.

As shown in Fig. 1,5,6, pivot flange 4 is welded with multiple attaching nuts 3 on the end face of mounting flange 1, fixed Flange 1 is provided with multiple connection counterbores 13, and attaching nut 3 passes through fixing bolt 2 detachably with counterbore 13 is connect correspondingly Connection；Wherein, epoxy resin layer 9 is wrapped in 3 outside of attaching nut, and attaching nut 3 and pivot flange 4 are fixed together.

Specifically, fixing bolt 2 is nigrescence soket head cap screw, and it is non-magnetic, avoid the magnetic field to current transformer ontology from making At influence.

The present embodiment by fixing bolt 2 respectively with connect counterbore 13 and attaching nut 3 and connects, realize mounting flange 1 and Being detachably connected for pivot flange 4, it is easy to disassemble.Moreover, both being welded between attaching nut 3 and pivot flange 4, further through epoxy Resin layer 9 is fixed together, and bonding strength is more preferably.

Attaching nut 3 is first welded on pivot flange 4 by the utility model, then injects epoxy resin by pouring technology Mounting flange 1 to form an overall structure, then is fastened on pivot flange 4 by material by nigrescence soket head cap screw.

It is understood that can also be connected by other means between pivot flange 4 and mounting flange 1, such as welding or Person's clamp etc..

In order to further increase bonding strength, attaching nut 3 is distributed on pivot flange 4 along two circles, and is located at inner ring Attaching nut 3 and the attaching nut 3 for being located at outer ring are staggered, as seen in figs. 5-6.The present embodiment passes through two uniformly distributed circle connections Nut 3, realization pivot flange 4 are uniformly distributed with 1 tie point of mounting flange, ensure that the uniformity of bonding strength.Certainly, even Connected nut 3 can also be distributed according to a circle or using other modes, be such as distributed along wave.

Preferably, pivot flange 4 and mounting flange 1 are aluminium flange.Pivot flange 4 and mounting flange 1 are all made of aluminium sheet It is made, lighter weight, intensity are higher.It is of course also possible to use steel plate or other structures are made.

As shown in Figure 1, current transformer ontology includes the multiple monomer current transformers 7 stacked along axial direction, monomer electric current Mutual inductor 7 and 4 coaxial line of pivot flange；One termination positive terminal Y, another termination earthing rodPrimary line 6, primary line 6 is from list The inner hole of body current transformer 7 passes through, and is pierced by from threading notch, and epoxy resin layer 9 is wrapped in the outside of primary line 6, positive terminal Y and Earthing rodIt is arranged on epoxy resin layer 9, earthing rodOn be provided with ground line 8.

Multiple monomer current transformers 7 overlay on pivot flange 4 and insulating board 5 according to axial, and pivot flange 4, Insulating board 5 and 7 coaxial line of monomer current transformer are placed.Primary line 6 is passed through from the inner hole of monomer current transformer 7, from The threading notch of insulating board 5 is pierced by, and primary line 6 one terminates positive terminal Y, another termination earthing rodTo form polarity survey Structure is tried, mechanical erection is convenient for.

Monomer current transformer 7 includes monomer measurement grade current transformer and monomer transient protection grade current transformer.

Monomer transient protection grade current transformer includes: the transient protection grade iron that circular ring shape is made of high saturation silicon-steel sheet coiled The radial cuts of core 71, transient protection grade iron core 71 have air gap 72；The enamel insulated round copper wire being wound on transient protection grade iron core 71 73, the both ends outlet of enamel insulated round copper wire 73 is drawn by annealed copper strand wire 74, and is respectively welded at the first binding post S1 and second and is connect On terminal S2, the first binding post S1 and the second binding post S2 are arranged on epoxy resin layer 9.In casting process, by all One binding post S1 and the second binding post S2 are fixed on mold.

Monomer measurement grade current transformer includes the measurement that the internal almag shield box filled with Superfine crystal material is formed Grade iron core.

As shown in Figure 1, monomer current transformer 7 is 6, correspondingly, the first binding post S1 and the second binding post S2 has 6 It is right, it is convenient for mechanical erection.

Current transformer primary current is small meeting for above-mentioned monomer current transformer 7, under the high requirement of measurement accuracy, significantly Reduce the size of current transformer.

The pouring current transformer of the utility model in process, by all monomer current transformers 7, supporting methods Orchid 4, primary line 6 and binding post pour into an entirety using epoxide resin automatic pressure gel forming technique；It will finally fix Flange 1 is fastened on pivot flange 4.

Epoxide resin automatic pressure gel technology (APG) is by being continuously subject to constant pressure to mixture of epoxy resins Power achievees the purpose that force supplement cure shrinkage.This process is completed in the mold of very high temperature, to make high reaction Active mixture of epoxy resins, in a short time rapid gellation.

The manufacturing process of pouring current transformer provided by the embodiment of the utility model is as follows:

Annulus shaped iron core is made in high saturation silicon-steel sheet coiled, after core annealing processing, cuts an air gap 72, system in its section Cause the iron core with air gap 72.

Outlet is drawn by annealed copper strand wire 74, and is welded on by the coiling enamel insulated round copper wire 73 on the iron core with air gap 72 On first binding post S1 and the second binding post S2.Manufacture into monomer transient protection grade (TPY) current transformer.

Two piece insulating paperboards 5 are placed on pivot flange 4, then more monomer current transformers 7 are axial folded in order It is placed on pivot flange 4 and insulating board 5.Pivot flange 4, insulating board 5 and 4-6 7 coaxial placement of monomer current transformer.

Primary line 6 is passed through from the inner hole of monomer current transformer 7, is pierced by from the threading notch of insulating board 5, primary line A 6 termination positive terminal Y, another termination earthing rodAll binding posts are fixed on mold, using automatic by installation mold Pressure gel forming technique injects epoxide resin material.Solidify chamfering of polishing after demoulding.With nigrescence soket head cap screw by fixation Orchid 1 fastens.Finally installation ground line 8.

The pouring technology of the pouring current transformer of the utility model using epoxide resin automatic pressure gel at Type technology, using the technology energy rapid gellation, cure cycle is short, substantially reduces the production cycle.Anti-cracking performance is good, insulation Performance and high mechanical strength, surface is smooth, solves the problems, such as to generate bubble.Improve the electric property and safety of transformer Property.Improve safety, the reliability and stability of operation of power networks.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (10)

1. a kind of pouring current transformer, including current transformer ontology, which is characterized in that further include:

It is supported on the pivot flange (4) of current transformer ontology one end；

Insulation separates the Annular insulator of the pivot flange (4) Yu the current transformer ontology, and the Annular insulator is opened Equipped with threading notch；

Wherein, the inner ring of the current transformer ontology, outer ring and the current transformer ontology, the pivot flange (4), The mutual gap of the Annular insulator is provided with epoxy resin layer (9), and the epoxy resin layer (9) is by the electric current Mutual inductor ontology, the Annular insulator and the pivot flange (4) are fixed together.

2. pouring current transformer according to claim 1, which is characterized in that the Annular insulator includes overlaying Multilayer insulation cardboard (5) together.

3. pouring current transformer according to claim 1, which is characterized in that further include and the pivot flange (4) The mounting flange (1) of connection is provided on the mounting flange (1) and hangs socket part.

4. pouring current transformer according to claim 3, which is characterized in that the socket part of hanging includes:

It can be realized front handling mobile crane and connect the first of the pouring current transformer and hang socket part；

It can be realized reverse side and hang and connect the second of the pouring current transformer and hang socket part.

5. pouring current transformer according to claim 4, which is characterized in that described first to hang socket part be setting in institute Mounting flange (1) is stated close to the lifting lug (12) of the end face outer ring of the pivot flange (4)；

Described second to hang socket part be that screw thread lifting hole(eyelet) (11) on the mounting flange (1) is arranged.

6. pouring current transformer according to claim 3, which is characterized in that the pivot flange (4) is close to described It is welded on the end face of mounting flange (1) multiple attaching nuts (3), the mounting flange (1) is provided with multiple connection counterbores (13), the attaching nut (3) is detachably connected by fixing bolt (2) correspondingly with the connection counterbore (13)；

Wherein, the epoxy resin layer (9) is wrapped on the outside of the attaching nut (3), and by the attaching nut (3) and described Pivot flange (4) is fixed together.

7. pouring current transformer according to claim 6, which is characterized in that the attaching nut (3) is along two circles point Cloth is on the pivot flange (4), and the attaching nut (3) for being located at inner ring is staggered with the attaching nut (3) for being located at outer ring.

8. pouring current transformer according to claim 3, which is characterized in that the pivot flange (4) and described solid Determining flange (1) is aluminium flange.

9. pouring current transformer according to claim 1-8, which is characterized in that the current transformer sheet Body includes:

The multiple monomer current transformers (7) stacked along axial direction, the monomer current transformer (7) and the pivot flange (4) Coaxial line；

One termination positive terminal (Y), the primary line (6) of another termination earthing rod, the primary line (6) is from the monomer Current Mutual Inductance The inner hole of device (7) passes through, and is pierced by from the threading notch, and the epoxy resin layer (9) is wrapped on the outside of the primary line (6), The positive terminal (Y) and the earthing rod are arranged on the epoxy resin layer (9), and ground line is provided on the earthing rod (8)。

10. pouring current transformer according to claim 9, which is characterized in that monomer current transformer (7) packet Include monomer measurement grade current transformer and monomer transient protection grade current transformer；

The monomer transient protection grade current transformer includes:

The transient protection grade iron core (71) of circular ring shape, the diameter of the transient protection grade iron core (71) are made of high saturation silicon-steel sheet coiled To being cut with air gap (72)；

The enamel insulated round copper wire (73) being wound on the transient protection grade iron core (71), the two of the enamel insulated round copper wire (73) bring out Line is drawn by annealed copper strand wire (74), and is respectively welded on the first binding post (S1) and the second binding post (S2), described first Binding post (S1) and second binding post (S2) are arranged on the epoxy resin layer (9)；

The monomer measures grade current transformer

The measurement grade iron core that inside is formed filled with the almag shield box of Superfine crystal material.