CN106024299B - A kind of zero sequence current mutual inductor for preventing cable from loosening - Google Patents
A kind of zero sequence current mutual inductor for preventing cable from loosening Download PDFInfo
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- CN106024299B CN106024299B CN201610474013.1A CN201610474013A CN106024299B CN 106024299 B CN106024299 B CN 106024299B CN 201610474013 A CN201610474013 A CN 201610474013A CN 106024299 B CN106024299 B CN 106024299B
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- claw
- pressure
- pressure ring
- core tube
- sequence current
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- 210000000078 claw Anatomy 0.000 claims abstract description 42
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two members engaging the pipe, cable or protective tubing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase AC
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
本发明涉及一种防止线缆松动的零序电流互感器，包括一压环、一芯管、一芯棒、一电流互感器和两套压爪组件；所述压环为一中空套筒，其内部容纳有一芯管，所述芯管同轴设置在压环内，该芯管两端分别对称活动连接有一套压爪组件，所述压爪组件包括若干沿芯管圆周面布置的压爪，所述压爪包括压爪杆以及位于压爪杆下端部的压头，所述压爪杆上端部垂直穿过压环侧壁，且该压爪杆上套设有锁紧螺栓，所述芯棒设置在芯管内部，且通过加强筋与芯管连接。本发明的优点在于：本发明的零序电流互感器由于自带压爪式锁紧机构，不需要预留安装位，易于安装。
The invention relates to a zero-sequence current transformer for preventing cable loosening, comprising a pressure ring, a core tube, a mandrel, a current transformer and two sets of pressure jaw assemblies; the pressure ring is a hollow sleeve, It contains a core tube inside, and the core tube is coaxially arranged in the pressure ring, and a set of pressure claw assemblies are symmetrically and flexibly connected to both ends of the core tube, and the pressure claw assembly includes several pressure claws arranged along the peripheral surface of the core tube , the pressure claw includes a claw rod and a pressure head located at the lower end of the claw rod, the upper end of the claw rod vertically passes through the side wall of the pressure ring, and a locking bolt is sleeved on the claw rod, the The mandrel is arranged inside the core tube and is connected with the core tube through a reinforcing rib. The advantage of the present invention is that: the zero-sequence current transformer of the present invention is easy to install because it does not need to reserve an installation position because it has a claw-type locking mechanism.
Description
技术领域technical field
本发明涉及一种电力领域，特别涉及一种防止线缆松动的零序电流互感器。The invention relates to the field of electric power, in particular to a zero-sequence current transformer for preventing cable loosening.
背景技术Background technique
零序电流保护的基本原理是基于基尔霍夫电流定律：流入电路中任一节点的复电流的代数和等于零。在线路与电气设备正常的情况下，各相电流的矢量和等于零，因此，零序电流互感器的二次侧绕组无信号输出，执行元件不动作。当发生触电或漏电故障时的各相电流的矢量和不为零，故障电流使零序电流互感器的铁芯中产生磁通，零序电流互感器所产生的电流即为零序电流。保护机构接收到该零序电流信号时，可根据漏电量采取相应的保护动作。The basic principle of zero-sequence current protection is based on Kirchhoff's current law: the algebraic sum of the complex current flowing into any node in the circuit is equal to zero. When the line and electrical equipment are normal, the vector sum of the currents of each phase is equal to zero. Therefore, the secondary side winding of the zero-sequence current transformer has no signal output, and the actuator does not operate. When an electric shock or leakage fault occurs, the vector sum of the currents of each phase is not zero, and the fault current causes magnetic flux in the iron core of the zero-sequence current transformer, and the current generated by the zero-sequence current transformer is the zero-sequence current. When the protection mechanism receives the zero-sequence current signal, it can take corresponding protection actions according to the leakage amount.
现有零序电流互感器的安装方式多是采用法兰安装固定或者采用粘结方式固定，其安装位置一般需要预留，故使得零序电流互感器的应用推广受到较多限制。Most of the existing zero-sequence current transformers are installed by means of flange installation or bonding, and the installation position generally needs to be reserved, so the application and promotion of zero-sequence current transformers are more restricted.
发明内容Contents of the invention
本发明要解决的技术问题是提供一种防止线缆松动的零序电流互感器。The technical problem to be solved by the present invention is to provide a zero-sequence current transformer that prevents cables from loosening.
为解决上述技术问题，本发明的技术方案为：一种防止线缆松动的零序电流互感器，其创新点在于：包括一压环、一芯管、一芯棒、一电流互感器和两套压爪组件；所述压环为一中空套筒，其内部容纳有一芯管，所述芯管同轴设置在压环内，该芯管两端分别对称活动连接有一套压爪组件，所述压爪组件包括若干沿芯管圆周面布置的压爪，所述压爪包括压爪杆以及位于压爪杆上靠近芯棒的一端的压头，压爪杆远离芯棒的一端垂直穿过压环侧壁，螺栓A设置在压爪杆上靠近压环的一端，螺栓B设置在压爪杆上靠近芯管的一端；所述螺栓A上端具有对称设置的触角，所述螺栓B下端具有对称设置的触角。In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a zero-sequence current transformer for preventing cable loosening. Set of pressure claw components; the pressure ring is a hollow sleeve, which contains a core tube, the core tube is coaxially arranged in the pressure ring, and a set of pressure claw components are respectively symmetrically and flexibly connected to the two ends of the core tube. The pressure claw assembly includes several pressure claws arranged along the circumferential surface of the core tube, the pressure claws include a pressure claw rod and a pressure head located at one end of the pressure claw rod close to the core rod, and the end of the pressure claw rod away from the core rod passes through vertically On the side wall of the pressure ring, the bolt A is arranged on the end of the pressure claw rod close to the pressure ring, and the bolt B is arranged on the end of the pressure claw rod close to the core tube; the upper end of the bolt A has symmetrically arranged antennae, and the lower end of the bolt B has Symmetrically arranged antennae.
进一步的，所述压环外表面上具有与压爪杆上端配合的沿压环圆周方向延伸的腰型槽。Further, the outer surface of the pressure ring has a waist-shaped groove that cooperates with the upper end of the pressure claw rod and extends along the circumferential direction of the pressure ring.
本发明的优点在于：The advantages of the present invention are:
(1)本发明的零序电流互感器由于自带压爪式锁紧机构， 不需要预留安装位，易于安装。(1) Since the zero-sequence current transformer of the present invention has its own claw-type locking mechanism, it does not need to reserve an installation position and is easy to install.
(2)本发明采用两套压爪组件夹紧在同一线缆上，具有双保险的效果，即使其中一套在使用中出现问题，还有另一套保证其工作性能。(2) The present invention uses two sets of claw assemblies to be clamped on the same cable, which has the effect of double insurance. Even if one set has problems in use, the other set can guarantee its working performance.
(3)本发明通过设置在压环和芯管之间的螺栓，驱动压头夹紧电力线缆，同时保证了芯管固定在压环上，具有优异的防松动效果，有效保证长期工作的稳定可靠性。(3) The present invention drives the pressure head to clamp the power cable through the bolts arranged between the pressure ring and the core tube, and at the same time ensures that the core tube is fixed on the pressure ring, has an excellent anti-loosening effect, and effectively ensures long-term work. Stable and reliable.
(4)锁紧螺栓分为压紧在压环内侧面上的螺栓A，和压紧在芯管外侧面上的螺栓B，螺栓A保证压环和压爪杆的位置关系，螺栓B保证芯管和压爪杆的位置，两个螺栓拧紧方向不同，保证连接的牢固性。(4) The locking bolts are divided into bolt A that is pressed on the inner surface of the pressure ring, and bolt B that is pressed on the outer surface of the core tube. Bolt A ensures the positional relationship between the pressure ring and the pressure claw rod, and bolt B ensures the core. The position of the tube and the pressure claw rod, and the tightening direction of the two bolts are different to ensure the firmness of the connection.
附图说明Description of drawings
图1为本发明一种防止线缆松动的零序电流互感器的移除电流互感器后截面示意图。Fig. 1 is a schematic cross-sectional view of a zero-sequence current transformer for preventing cable looseness according to the present invention after removing the current transformer.
图2为本发明一种防止线缆松动的零序电流互感器的移除电流互感器后侧视图。Fig. 2 is a rear side view of a zero-sequence current transformer for preventing cable loosening according to the present invention, with the current transformer removed.
具体实施方式Detailed ways
如图1、图2所示，本发明公开了一种防止线缆松动的零序电流互感器，包括一压环5、一芯管6、一芯棒7、一电流互感器和两套压爪组件；压环5为一中空套筒，其内部容纳有一芯管6，芯管6同轴设置在压环5内，该芯管6两端分别对称活动连接有一套压爪组件，压爪组件包括若干沿芯管6圆周面布置的压爪，压爪包括压爪杆2以及位于压爪杆上靠近芯棒的一端的压头8，压爪杆远离芯棒的一端垂直穿过压环侧壁，螺栓A设置在压爪杆上靠近压环的一端，且该压爪杆2上套设有锁紧螺栓，芯棒7设置在芯管6内部，且通过加强筋1与芯管6连接。As shown in Figures 1 and 2, the present invention discloses a zero-sequence current transformer for preventing cable loosening, including a pressure ring 5, a core tube 6, a mandrel 7, a current transformer and two sets of voltage transformers. Claw assembly; the pressure ring 5 is a hollow sleeve, which contains a core tube 6 coaxially arranged in the pressure ring 5, and a set of pressure claw components are respectively symmetrically connected to the two ends of the core tube 6, and the pressure claws The assembly includes several pressing jaws arranged along the circumference of the core tube 6. The pressing jaws include a pressing jaw rod 2 and a pressure head 8 located on the end of the pressing jaw rod close to the mandrel. The end of the pressing jaw rod away from the mandrel passes through the pressure ring vertically. On the side wall, the bolt A is set on the end of the pressure claw rod close to the pressure ring, and the pressure claw rod 2 is covered with a locking bolt, the mandrel 7 is set inside the core tube 6, and through the reinforcing rib 1 and the core tube 6 connect.
压环5外表面上具有与压爪杆2上端配合的沿压环5圆周方向延伸的腰型槽9，可以适应不同的压爪杆2连接位置；锁紧螺栓具有螺栓A3以及螺栓B4，螺栓A3设置在压爪杆2上部，便于与压环5连接紧密，螺栓B4设置在压爪杆2下部；两螺栓向相对的位置旋紧，螺栓A3上端具有对称设置的触角，便于与压环的弧形内壁接触，螺栓B4下端具有对称设置的触角，便于与芯管6的弧形外壁接触。The outer surface of the pressure ring 5 has a waist-shaped groove 9 extending along the circumferential direction of the pressure ring 5 that matches with the upper end of the pressure claw rod 2, and can adapt to different connection positions of the pressure claw rod 2; the locking bolt has a bolt A3 and a bolt B4, and the bolt A3 is set on the upper part of the pressure claw rod 2, which is convenient to connect tightly with the pressure ring 5, and the bolt B4 is set on the lower part of the pressure claw rod 2; the two bolts are tightened to the opposite position, and the upper end of the bolt A3 has symmetrically arranged antennae, which is convenient for the connection with the pressure ring The arc-shaped inner wall is in contact, and the lower end of the bolt B4 has symmetrically arranged antennae, which facilitates contact with the arc-shaped outer wall of the core tube 6 .
以上显示和描述了本发明的基本原理和主要特征。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610474013.1A CN106024299B (en) | 2016-06-27 | 2016-06-27 | A kind of zero sequence current mutual inductor for preventing cable from loosening |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610474013.1A CN106024299B (en) | 2016-06-27 | 2016-06-27 | A kind of zero sequence current mutual inductor for preventing cable from loosening |
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| Publication Number | Publication Date |
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| CN106024299A CN106024299A (en) | 2016-10-12 |
| CN106024299B true CN106024299B (en) | 2018-06-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108493062A (en) * | 2018-05-29 | 2018-09-04 | 首瑞（天津）电气设备有限公司 | Major loop for residual current circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8403996D0 (en) * | 1984-02-15 | 1984-03-21 | Crest Energyscan Ltd | Current measuring device |
| CN2540019Y (en) * | 2002-04-12 | 2003-03-12 | 大连第一互感器厂 | current transformer for cable |
| US7884598B2 (en) * | 2007-08-30 | 2011-02-08 | Fluke Corporation | Clamp jaw assembly |
| CN203812739U (en) * | 2014-05-08 | 2014-09-03 | 过丽清 | Insulating rod for high-voltage switchgear |
| CN105609281A (en) * | 2016-01-15 | 2016-05-25 | 胡妍 | Zero-sequence current transformer for preventing cable from loosening |
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