CN105551718A - Zero-sequence current mutual inductor with relatively good anti-loosening property - Google Patents
Zero-sequence current mutual inductor with relatively good anti-loosening property Download PDFInfo
- Publication number
- CN105551718A CN105551718A CN201610093472.5A CN201610093472A CN105551718A CN 105551718 A CN105551718 A CN 105551718A CN 201610093472 A CN201610093472 A CN 201610093472A CN 105551718 A CN105551718 A CN 105551718A
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- China
- Prior art keywords
- ring
- mutual inductor
- paw
- core pipe
- current mutual
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
Abstract
The invention discloses a zero-sequence current mutual inductor with relatively good anti-loosening property; the zero-sequence current mutual inductor comprises a pressure ring, a core tube, a core rod, a current mutual inductor and claw pressing components; the pressure ring is rotationally arranged on the outer circumferential wall of the core tube; the pressure ring comprises a ratchet ring which is provided with multiple slope grooves; each of the slope grooves is provided with multiple wedge-shaped anti-dropping teeth; multiple radial guiding holes are formed in the tube wall of the core tube; each of the claw pressing components comprises at least three pressing claws and a reset spring; each of the pressing claws includes a plate pressing part and a radial sliding column; wedge-shaped teeth are arranged at the outside end of each of the radial sliding columns; the plate pressing part of each of the pressing claws is positioned in a tube cavity of the core tube; each of the radial sliding columns passes through one radial guiding hole; the top of each of the wedge-shaped teeth is connected to the corresponding one of the wedge-shaped anti-dropping teeth; the core rod is positioned in the tube cavity of the core tube; the core rod is provided with at least three arc clamping grooves; each of the arc clamping grooves and the corresponding one of arc grooves are clamped to form one wire clamping hole; the current mutual inductor is provided with an annular base; and each of the wire clamping holes is positioned in a hole cavity of the annular base. The zero-sequence current mutual inductor disclosed by the invention has relatively good electrical property.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of zero sequence current mutual inductor of anti-loosening better performances.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the algebraical sum flowing into the telegram in reply stream of any node in circuit equals zero.Under circuit and the normal situation of electric equipment, the vector of each phase current equals zero, and therefore, the secondary side winding no signal of zero sequence current mutual inductor exports, and executive component is failure to actuate.The vector of each phase current when there is electric shock or leak current fault is non-vanishing, and fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and the electric current that zero sequence current mutual inductor produces is zero-sequence current.When protection mechanism receives this zero sequence current signal, corresponding protection act can be taked according to electrical leakage quantity.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, and its installation site generally needs to reserve, therefore makes its application be subject to more restriction.
Summary of the invention
The object of this invention is to provide and be a kind ofly convenient to that location is installed, there is better firmness, effectively prevent the zero sequence current mutual inductor that loosens.
The technical scheme realizing the object of the invention is: a kind of zero sequence current mutual inductor of anti-loosening better performances, comprises pressure ring, core pipe, plug, current transformer and paw assembly; Pressure ring rotates and is arranged on core pipe periphery wall; Pressure ring comprises the sour jujube ring that internal perisporium is provided with multiple slopes groove; Multiple wedge shape anticreep tooth is provided with in the groove of each slope; Core tube wall is provided with multiple radially-directed hole; Paw assembly comprises at least three paws and provides the back-moving spring of reseting elasticity for each paw; Each paw comprises pressing plate portion and is arranged on the radial traveller on pressing plate portion outer wall; The outboard end of each radial traveller is provided with the chisel teeth with the wedge shape anticreep tooth adaptation in the groove of sour jujube ring slope; The pressing plate portion of each paw is arranged in core pipe tube chamber, the radial traveller of each paw is through the corresponding radially-directed hole on core tube wall, under the elastic force effect of back-moving spring, on the wedge shape anticreep tooth of the chisel teeth apical grafting on each radial traveller in a corresponding slope groove; Also comprise axial back-up ring; The periphery wall of core pipe is provided with the annular gear platform of evagination and the annular groove of indent, and axial back-up ring is arranged in the annular groove of core pipe; The two side ends of pressure ring is slided adjacent with annular gear platform and axial back-up ring respectively; Pressure ring also comprises two clamping connection rings and multiple connecting rivet, two clamping connection ring separation sour jujube ring both sides, and sour jujube ring and two clamping connection ring riveted joints are axially fixed along core pipe by connecting rivet; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with at least three arc clip slots, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; Current transformer is provided with annular matrix, and each clamp hole is all arranged in the vestibule of annular matrix.
The present invention owing to having thread clamping mechanism, therefore is easy to install location; The present invention is positioned each paw by the slope groove with wedge shape anticreep tooth in addition, the technique effect preventing from falling back can be played, compare with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, effectively ensure the reliability of long-term work.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the first structure of the present invention;
Fig. 2 partly cuts open structural representation for the one of zero sequence current mutual inductor shown in Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 2;
A kind of explosive view that Fig. 4 is zero sequence current mutual inductor shown in Fig. 1;
Fig. 5 moves a kind of perspective view of core pipe for zero sequence current mutual inductor shown in Fig. 1;
Fig. 6 is that the one of the second structure of the present invention partly cuts open structural representation;
Fig. 7 is a kind of perspective view of the core pipe of zero sequence current mutual inductor shown in Fig. 6;
Fig. 8 is that the one of the third structure of figure the present invention partly cuts open structural representation.
Embodiment
(embodiment 1)
The present embodiment is a kind of zero sequence current mutual inductor of anti-loosening better performances, sees shown in Fig. 1 to Fig. 5, comprises a pressure ring 1, core pipe 2, four paw assemblies 3, axial back-up ring, 4, plug 7 and a current transformer 8.
Pressure ring 1 comprises sour jujube ring 11, separation two clamping connection rings 12 of sour jujube ring both sides and multiple connecting rivet 13, two clamping connection ring clamping sour jujube rings, connecting rivet axially runs through described sour jujube ring and two clamping connection rings along core pipe, thus sour jujube ring is fixedly connected into an entirety with two clamping connection rings.The internal perisporium of sour jujube ring is provided with multiple slopes groove 111, is provided with multiple wedge shape anticreep tooth 112 in the groove of each slope; In the present embodiment, the internal perisporium of sour jujube ring and the internal perisporium of clamping connection ring coplanar, the periphery wall of sour jujube ring and the periphery wall of clamping connection ring coplanar; The periphery wall of pressure ring is provided with multiple binding groove 14 axially running through whole pressure ring along core pipe, and the operation of twisting of pressure ring adopts hook type spanner (being commonly called as hook spanner).In concrete practice, the internal diameter of clamping connection ring also can be slightly smaller than the internal perisporium of sour jujube ring.Slope groove in the present embodiment refers to that depth of groove passes through the groove increased progressively gradually.
The periphery wall of core pipe 2 is provided with the annular gear platform 21 of evagination and the annular groove 22 of indent, and core pipe is provided with multiple radially-directed hole 23 on the tube wall between annular gear platform and annular groove; In the present embodiment, each radially-directed hole is along core caliber to running through core tube wall, each radially-directed hole comprises containing hole 231 and the guiding slide opening 232 of connection, containing hole and guiding slide opening set gradually along direction from outside to inside, containing hole and guiding slide opening are all circular holes, the aperture of containing hole is greater than the aperture of guiding slide opening, and the cross sectional shape in each radially-directed hole is T-shaped.Axial back-up ring is arranged in the annular groove of core pipe.Pressure ring rotates and is arranged on core pipe periphery wall, and the two side ends of pressure ring is slided adjacent with annular gear platform and axial back-up ring respectively.
Paw assembly 3 comprises multiple paw 31, provides the back-moving spring 32 of reseting elasticity for paw and is fixedly installed on the mat 33 on each paw; Each paw comprises pressing plate portion 311, the radial traveller 312 be arranged on pressing plate portion outer wall, the annular slot 313 be arranged on radial traveller periphery wall; Guiding slide opening in each radial traveller and radially-directed hole is adaptive, each radial traveller under the position-limiting action of guiding slide opening along core caliber to reciprocatingly sliding; The outboard end of each radial traveller is provided with chisel teeth 34; Wedge shape anticreep tooth in each chisel teeth and sour jujube ring slope groove is adaptive.Each mat is fixed in the annular slot of a corresponding radial traveller, each back-moving spring is set on a corresponding radial traveller, each back-moving spring is connected in a corresponding annular mat along core caliber outer end upwards, and back-moving spring is connected on the diapire of containing hole along core caliber the inner upwards;
The pressing plate portion of each paw is arranged in core pipe tube chamber, the radial traveller of each paw is through the corresponding radially-directed hole on core tube wall, under the elastic force effect of back-moving spring, on the wedge shape anticreep tooth of the chisel teeth apical grafting on each radial traveller in a corresponding slope groove of sour jujube ring.Under the position-limiting action of slope groove and chisel teeth, the pressure ring in the present embodiment can only be twisted along a direction, has the technique effect that anti-retrogression is also namely anti-loosening.
The inwall in each paw pressing plate portion is provided with deep-slotted chip breaker 314.
Plug 7 is arranged in core pipe tube chamber; The periphery wall of plug is provided with multiple arc clip slot 71, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole 5; So the present embodiment can form four clamp holes, can be used for clamping four cables simultaneously.
The periphery wall of plug is provided with four the supporting and location flanges 72 protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners 24, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of matrix slip pipe.
Current transformer comprises annular matrix 81 and intelligent control module 82; Annular matrix is fixedly installed on a clamping connection ring; In the present embodiment, a clamping connection ring is provided with installation gap 121 at a side of adjacent sour jujube ring, and annular matrix is inlaid in this installation gap.
The present embodiment forms four clamp holes altogether, and during use, wherein three clamp holes respectively clamp a phase line cable, and another one folder hole is as subsequent use.Because three electric power cables pass from matrix slip pipe tube chamber, this current transformer can carry out zero-sequence current detection by induction mode to three electric power cables, for Timeliness coverage leakage current fault, and send real time information to distance host by wireless transmit/receive units, for power circuit intellectuality provides basic data.
The present embodiment is when operating, hook type spanner is adopted to twist pressure ring, pressure ring is made to drive the wedge shape anticreep tooth in its slope groove to rotate, shortening can be out of shape because each back-moving spring is stressed, the chisel teeth of the radial traveller of each pressing plate is moved towards the side that groove depth in the groove of slope is more shallow, and then make the pressing plate portion of each paw along the radially-inwardly slippage of core pipe, thus clamping is arranged in the electric power cable in clamp hole.
In addition, the present embodiment is positioned each paw by the slope groove with wedge shape anticreep tooth, can play the technique effect preventing from falling back, and compares with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, effectively ensure the reliability of long-term work.
(embodiment 2)
The present embodiment is substantially identical with embodiment 1, and difference is: see shown in Fig. 6 and Fig. 7, and in addition, the periphery wall of core pipe is provided with resettlement groove 25, and intelligent control module is arranged in resettlement groove; Intelligent control module can comprise wireless transmit/receive units; This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
(embodiment 3)
The present embodiment is substantially identical with embodiment 1, difference is: as shown in Figure 8, the present embodiment is no longer arranged on the annular matrix of voltage transformer in clamping connection ring, in the present embodiment, the annular matrix of voltage transformer is fixedly installed on core pipe periphery wall, this scheme is also feasible, structure compacter and be easy to manufacture processing; As long as allow in a word by folder electric power cable through annular matrix.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (1)
1. a zero sequence current mutual inductor for anti-loosening better performances, is characterized in that: comprise pressure ring, core pipe, plug, current transformer and paw assembly; Pressure ring rotates and is arranged on core pipe periphery wall; Pressure ring comprises the sour jujube ring that internal perisporium is provided with multiple slopes groove; Multiple wedge shape anticreep tooth is provided with in the groove of each slope; Core tube wall is provided with multiple radially-directed hole; Paw assembly comprises at least three paws and provides the back-moving spring of reseting elasticity for each paw; Each paw comprises pressing plate portion and is arranged on the radial traveller on pressing plate portion outer wall; The outboard end of each radial traveller is provided with the chisel teeth with the wedge shape anticreep tooth adaptation in the groove of sour jujube ring slope; The pressing plate portion of each paw is arranged in core pipe tube chamber, the radial traveller of each paw is through the corresponding radially-directed hole on core tube wall, under the elastic force effect of back-moving spring, on the wedge shape anticreep tooth of the chisel teeth apical grafting on each radial traveller in a corresponding slope groove; Also comprise axial back-up ring; The periphery wall of core pipe is provided with the annular gear platform of evagination and the annular groove of indent, and axial back-up ring is arranged in the annular groove of core pipe; The two side ends of pressure ring is slided adjacent with annular gear platform and axial back-up ring respectively; Pressure ring also comprises two clamping connection rings and multiple connecting rivet, two clamping connection ring separation sour jujube ring both sides, and sour jujube ring and two clamping connection ring riveted joints are axially fixed along core pipe by connecting rivet; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with at least three arc clip slots, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; Current transformer is provided with annular matrix, and each clamp hole is all arranged in the vestibule of annular matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093472.5A CN105551718A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor with relatively good anti-loosening property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093472.5A CN105551718A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor with relatively good anti-loosening property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105551718A true CN105551718A (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610093472.5A Withdrawn CN105551718A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor with relatively good anti-loosening property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105551718A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN103490350A (en) * | 2013-10-08 | 2014-01-01 | 国家电网公司 | Peeling and cutting tool for outer semi-conducting layer of crosslinked power cable |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
-
2016
- 2016-01-15 CN CN201610093472.5A patent/CN105551718A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN103490350A (en) * | 2013-10-08 | 2014-01-01 | 国家电网公司 | Peeling and cutting tool for outer semi-conducting layer of crosslinked power cable |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160504 |
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| WW01 | Invention patent application withdrawn after publication |