阅读说明：本技术 一种漏电断路器 (Residual current circuit breaker ) 是由 徐照伟 郭得道 赵燕威 于 2020-07-23 设计创作，主要内容包括：本发明公开了一种漏电断路器,涉及断路器技术领域,包括壳体,所述壳体上设有L极进出线柱,N极进出线柱,磁脱扣机构、操作机构、热脱扣机构和灭弧系统；其中,所述操作机构与脱扣架一端连接；脱扣架另一端与L极动触头和N极动触头连接；转轮位于脱扣架下方,转轮与动触头压簧一端连接,动触头压簧另一端一侧与L极动触头一端连接；动触头压簧另一端的另一侧与N极动触头一端连接；L极动触头另一端与L极静触头可分离式接触；N极动触头另一端与N极静触头可分离式接触。针对现有技术中的断路器存在灭弧不彻底形成二次燃弧的技术问题,它在N极设置了一条灭弧筋,优化了产品空间设计,可以有效的将电弧隔离并熄灭。(The invention discloses a leakage circuit breaker, which relates to the technical field of circuit breakers and comprises a shell, wherein an L-pole inlet and outlet wire column, an N-pole inlet and outlet wire column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system are arranged on the shell; the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of the N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact. Aiming at the technical problem that the circuit breaker in the prior art has incomplete arc extinction and secondary arcing, the N pole is provided with an arc extinction rib, the product space design is optimized, and the electric arc can be effectively isolated and extinguished.)

1. A leakage circuit breaker is characterized by comprising a shell, wherein an L-pole inlet and outlet wire column, an N-pole inlet and outlet wire column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system are arranged on the shell; wherein the content of the first and second substances,

the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of an N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact;

the arc extinguishing system comprises an arc extinguishing chamber and an arc extinguishing rib, wherein the arc extinguishing chamber is used for eliminating electric arcs generated at the separation position of the L-pole static contact and the L-pole moving contact; the arc extinguishing rib is used for eliminating electric arcs generated at the separation position of the N-pole static contact and the N-pole moving contact;

the magnetic tripping mechanism comprises a coil connected with an L-pole fixed contact, a movable iron core, a coil framework positioned in the coil and a leakage coil positioned in the coil framework, wherein the movable iron core, a coil pressure spring and an ejector rod are sequentially arranged in the leakage coil from one end of the leakage coil, the other end of the leakage coil is provided with a fixed iron core, and a hole through which the ejector rod can pass is formed in the fixed iron core; the leakage coil is connected with the output end of the circuit board, and the input end of the circuit board is connected with the output end of the magnetic ring; the L-pole lead, the N-pole lead and the lead of the testing mechanism all penetrate through the magnetic ring;

the thermal tripping mechanism comprises a bimetallic strip, one end of the bimetallic strip is connected with the L-pole moving contact through a first copper conductor, the other end of the bimetallic strip is connected with the L-pole conductor through a second copper conductor, and one end of the bimetallic strip is adjacent to an end plate at one end of the tripping pull rod and is provided with a gap; the other end of the tripping pull rod is connected with the tripping frame.

2. A residual current circuit breaker according to claim 1, characterized in that said operating mechanism comprises a handle, and a trip frame and a wheel which are detachably engaged with each other, a handle torsion spring, a trip tension spring, a trip compression spring and a U-shaped rod; one end of the handle torsion spring is fixedly connected with the shell, the handle torsion spring body is assembled in a cylindrical hole in the center of the circular part of the handle, and the other end of the handle torsion spring is fixed on the surface of the circular part of the handle;

one end of the U-shaped rod is inserted into the circular part of the handle, the other end of the U-shaped rod is clamped with the tripping frame and one end of the rotating wheel, the other end of the rotating wheel is connected with one end of the tripping pressure spring, and the other end of the tripping pressure spring is connected with the tripping frame.

3. A residual current circuit breaker according to claim 1, characterized in that it further comprises a partition for isolating said circuit board.

4. A residual current circuit breaker according to claim 1, wherein the N-pole wire inlet/outlet column is located at the other side of the housing, the N-pole wire inlet/outlet column includes an N-pole wire outlet column, and a terminal plate four connected to the N-pole wire outlet column, and the N-pole wire outlet column and the terminal plate four are both located at one end edge of the other side of the housing;

the N-pole wire inlet and outlet column further comprises an N-pole wire inlet column and a third wiring board connected with the N-pole wire inlet column, and the N-pole wire inlet column and the third wiring board are both located at the edge of the other end of the other side of the shell.

5. A residual current circuit breaker as claimed in claim 1, characterized in that said thermal trip mechanism further comprises a bimetal support for supporting a bimetal, said bimetal being connected to said bimetal support; the other end of the bimetallic strip is adjacent to the adjusting screw.

6. The residual current circuit breaker according to claim 1, further comprising a testing mechanism, wherein the testing mechanism comprises a testing button, a testing button compression spring, a first button rib and a second button rib connected with the L pole, and a testing button torsion spring in contact with the testing button compression spring; the testing button torsional spring is fixed on the shell and connected with the N pole, one end of the testing button torsional spring is positioned at the bottom of the testing button, and one end of the testing button compressed spring is positioned below the bottom of the testing button; and a first button rib sheet and a second button rib sheet are arranged at the other end of the test button pressure spring.

7. An earth leakage breaker as claimed in claim 1, wherein said L-pole incoming and outgoing line post is located at one side of said housing, said L-pole incoming and outgoing line post comprises an L-pole incoming and outgoing line post located on a middle seat, and a first wiring board connected with the L-pole incoming and outgoing line post, said middle seat and said first wiring board are both located at one end edge of one side of said housing;

the L pole inlet and outlet wire column further comprises an L pole outlet wire column and a second wiring board connected with the L pole outlet wire column, and the L pole outlet wire column and the first wiring board are both located at the edge of the other end of one side of the shell.

8. A residual current circuit breaker according to claim 5, characterized in that the adjusting screw comprises an adjusting bolt and an adjusting screw, the end of the bimetal, which is far away from the first copper conductor, is adjacent to the adjusting screw passing through the adjusting bolt, and the adjusting bolt is fixed on the shell.

9. A residual current circuit breaker according to any one of claims 1-8, characterized in that said arc extinguishing chamber and said arc extinguishing rib are arranged on either side of the housing, respectively, said arc extinguishing rib being connected to the housing; and a fixing plate is arranged on the shell at the position of the L-pole static contact and is connected with the arc extinguish chamber.

10. A residual current circuit breaker as claimed in claim 2, characterized in that the other end of the turning wheel is provided with a first projection matched with one end of a tripping compression spring, and the tripping frame is provided with a second projection matched with the other end of the tripping compression spring.

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a residual current circuit breaker.

Background

The RCBO circuit breaker is a mechanical switching device for switching on, carrying and breaking a current under normal circuit conditions, and capable of opening contacts when a residual current reaches a prescribed value under prescribed conditions, and switching on a current for a certain time and automatically breaking even under prescribed abnormal circuit conditions (e.g., short circuit). The L pole of the existing RCBO circuit breaker generally comprises a magnetic notch breaker (containing movable iron cores, static iron cores, iron core springs, magnetic yokes, static contact rods, electromagnetic coils, coil frameworks, coils, ejector rods and other parts), an operating mechanism (containing handles, connecting rods, jump buckles, lock catches, notch breaking frames, levers, lock catch springs, contact springs, reset springs, movable contacts and contact supporting pieces), a thermal notch breaker (containing bimetallic supports and other parts), an arc extinguishing system (containing arc striking pieces, arc isolating pieces, magnetic conductive plates, arc extinguishing chambers and other parts), a circuit board and a mutual inductor; the N pole is also provided with an arc extinguishing system (including arc striking plates, arc isolating plates, arc extinguishing chambers and other parts); but still has the technical problem that the arc extinction is not complete and secondary arcing is formed.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention provides a leakage circuit breaker, aiming at the technical problem that the circuit breaker in the prior art cannot completely extinguish arcs to form secondary arcing.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the invention is as follows:

a leakage circuit breaker comprises a shell, wherein an L-pole inlet and outlet wire column, an N-pole inlet and outlet wire column, a magnetic tripping mechanism, an operating mechanism, a thermal tripping mechanism and an arc extinguishing system are arranged on the shell; the operating mechanism is connected with one end of the tripping frame; the other end of the tripping frame is connected with the L-pole moving contact and the N-pole moving contact; the rotating wheel is positioned below the tripping frame, the rotating wheel is connected with one end of a moving contact pressure spring, and one side of the other end of the moving contact pressure spring is connected with one end of an L-pole moving contact; the other side of the other end of the moving contact pressure spring is connected with one end of an N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; the other end of the N-pole moving contact is in separable contact with the N-pole static contact; the arc extinguishing system comprises an arc extinguishing chamber and an arc extinguishing rib, wherein the arc extinguishing chamber is used for eliminating electric arcs generated at the separation position of the L-pole static contact and the L-pole moving contact; the arc extinguishing rib is used for eliminating electric arcs generated at the separation position of the N-pole static contact and the N-pole moving contact; the magnetic tripping mechanism comprises a coil connected with an L-pole fixed contact, a movable iron core, a coil framework positioned in the coil and a leakage coil positioned in the coil framework, wherein the movable iron core, a coil pressure spring and an ejector rod are sequentially arranged in the leakage coil from one end of the leakage coil, the other end of the leakage coil is provided with a fixed iron core, and a hole through which the ejector rod can pass is formed in the fixed iron core; the leakage coil is connected with the output end of the circuit board, and the input end of the circuit board is connected with the output end of the magnetic ring; the L-pole lead, the N-pole lead and the lead of the testing mechanism all penetrate through the magnetic ring; the thermal tripping mechanism comprises a bimetallic strip, one end of the bimetallic strip is connected with the L-pole moving contact through a first copper conductor, the other end of the bimetallic strip is connected with the L-pole conductor through a second copper conductor, and one end of the bimetallic strip is adjacent to an end plate at one end of the tripping pull rod and is provided with a gap; the other end of the tripping pull rod is connected with the tripping frame.

Optionally, the operating mechanism comprises a handle, a tripping frame and a rotating wheel which are detachably engaged with each other, a handle torsion spring, a tripping tension spring, a tripping compression spring and a U-shaped rod; one end of the handle torsion spring is fixedly connected with the shell, the handle torsion spring body is assembled in a cylindrical hole in the center of the circular part of the handle, and the other end of the handle torsion spring is fixed on the surface of the circular part of the handle; one end of the U-shaped rod is inserted into the circular part of the handle, the other end of the U-shaped rod is clamped with the tripping frame and one end of the rotating wheel, the other end of the rotating wheel is connected with one end of the tripping pressure spring, and the other end of the tripping pressure spring is connected with the tripping frame.

Optionally, the circuit board further comprises a partition board for isolating the circuit board.

Optionally, the N-pole wire inlet/outlet column is located on the other side of the housing, the N-pole wire inlet/outlet column includes an N-pole wire outlet column and a fourth wiring board connected to the N-pole wire outlet column, and the N-pole wire outlet column and the fourth wiring board are both located at an edge of one end of the other side of the housing; the N-pole wire inlet and outlet column further comprises an N-pole wire inlet column and a third wiring board connected with the N-pole wire inlet column, and the N-pole wire inlet column and the third wiring board are both located at the edge of the other end of the other side of the shell.

Optionally, the thermal trip mechanism further includes a bimetallic support for supporting the bimetallic strip, and the bimetallic strip is connected to the bimetallic support; the other end of the bimetallic strip is adjacent to the adjusting screw.

Optionally, the testing device further comprises a testing mechanism, wherein the testing mechanism comprises a testing button, a testing button pressure spring, a button rib piece I and a button rib piece II which are connected with the L pole, and a testing button torsion spring which is contacted with the testing button pressure spring; the testing button torsional spring is fixed on the shell and connected with the N pole, one end of the testing button torsional spring is positioned at the bottom of the testing button, and one end of the testing button compressed spring is positioned below the bottom of the testing button; and a first button rib sheet and a second button rib sheet are arranged at the other end of the test button pressure spring.

Optionally, the L-pole wire inlet and outlet column is located at one side of the housing, the L-pole wire inlet and outlet column includes an L-pole wire inlet column located on the middle seat, and a first wiring board connected to the L-pole wire inlet column, and the middle seat and the first wiring board are both located at an edge of one end of one side of the housing; the L pole inlet and outlet wire column further comprises an L pole outlet wire column and a second wiring board connected with the L pole outlet wire column, and the L pole outlet wire column and the first wiring board are both located at the edge of the other end of one side of the shell.

Optionally, the adjusting screw includes an adjusting bolt and an adjusting screw, one end of the bimetal piece far away from the first copper wire is adjacent to the adjusting screw penetrating through the adjusting bolt, and the adjusting bolt is fixed on the housing.

Optionally, the arc extinguishing chamber and the arc extinguishing rib are respectively arranged on two sides of the shell, and the arc extinguishing rib is connected with the shell; and a fixing plate is arranged on the shell at the position of the L-pole static contact and is connected with the arc extinguish chamber.

Optionally, the other end of the rotating wheel is provided with a first protrusion matched with one end of the tripping pressure spring, and the tripping frame is provided with a second protrusion matched with the other end of the tripping pressure spring.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) in the leakage circuit breaker provided by the embodiment of the application, the operating mechanism acts to drive the tripping frame to act, and the tripping frame acts to drive the moving contact pressure spring to act, so that the L-pole moving contact is separated from or contacted with the L-pole static contact; the N-pole moving contact is separated from or contacted with the N-pole fixed contact, so that the leakage circuit breaker is closed or opened; the L-pole static contact leads electric arcs generated when the N-pole moving contact is separated from the N-pole static contact into the arc extinguish chamber, and the N-pole static contact leads the electric arcs generated when the N-pole moving contact is separated from the N-pole static contact onto the arc extinguish rib for arc extinction, so that the contact is prevented from being burnt out by the electric arcs.

(2) According to the leakage circuit breaker provided by the embodiment of the application, the L-pole moving contact and the L-pole static contact can be quickly separated by utilizing the compression elasticity of the moving contact pressure spring and the tripping pressure spring and the tension force of the tripping tension spring; the N-pole moving contact is quickly separated from the N-pole fixed contact; the secondary arcing phenomenon is generated, and the safety and the reliability of the contact are ensured. When the L-pole moving contact is separated from the L-pole fixed contact; the N-pole moving contact is separated from the N-pole fixed contact; in order to start the breaker again, the handle drives the U-shaped rod to act through the handle torsion spring, and then drives the rotating wheel and the tripping frame to act in sequence, so that the L-pole moving contact is contacted with the L-pole static contact; the N-pole moving contact is in contact with the N-pole fixed contact, and the tripping pressure spring and the moving contact pressure spring which are in a compressed state generate elastic force, so that the L-pole moving contact can be in full and reliable contact with the L-pole fixed contact, and the N-pole moving contact is in full and reliable contact with the N-pole fixed contact.

(3) The electric leakage circuit breaker provided by the embodiment of the application has the advantages that the partition plate is used for isolating the circuit board and the circuit board are current amplifying circuits, belong to weak current circuit boards, and prevent electric arcs generated when contacts are separated or heat generated when a circuit is overloaded from being damaged by the isolation effect of the partition plate.

(4) The embodiment of the application provides a leakage circuit breaker, makes N utmost point inlet wire post and N utmost point outlet wire post locate respectively the both ends of casing realize that circuit breaker one end is the inlet wire end, and the other end is the outlet wire end, ensure circuit safe and reliable. The L-pole wire inlet column and the L-pole wire outlet column are respectively arranged at two ends of the shell, so that one end of the breaker is a wire inlet end, and the other end of the breaker is a wire outlet end, and the safety and reliability of the circuit are ensured.

(5) According to the leakage circuit breaker provided by the embodiment of the application, the gap between the tripping pull rod and the bimetallic strip can be adjusted through the adjusting screw, under the condition that the bimetallic strip is deformed under the same thermal effect, the gap is different in size, and the time for the bimetallic strip to drive the tripping pull rod to act is different; the size of the gap is changed, the time for changing and separating the static contact can be changed, and the breaker can be quickly disconnected when the circuit is overloaded.

(6) The embodiment of the application provides a leakage circuit breaker, accredited testing organization is used for detecting whether effective leakage protection function, and accredited testing organization is used for simulating to produce the leakage current promptly, judges whether leakage circuit breaker can normally act the disconnection after sensing the leakage current, passes through accredited testing organization simulation leakage current at every other period, is used for detecting whether effective leakage protection function of leakage circuit breaker.

(7) The electric leakage circuit breaker provided by the embodiment of the application enables the L pole wire inlet column and the L pole wire outlet column to be respectively arranged at the two ends of the shell, one end of the circuit breaker is an wire inlet end, the other end of the circuit breaker is a wire outlet end, and safety and reliability of a circuit are guaranteed. The arc extinguishing system further comprises a first arc striking plate and a second arc striking plate, one end of the arc striking plate is connected with the arc extinguishing chamber, and the other end of the arc striking plate is fixedly connected with the double-metal supporting piece; one end of the second arc striking piece is positioned at the N-pole moving contact, and the other end of the second arc striking piece is connected with the arc extinguishing rib; the effect of complete arc extinction is realized.

(8) According to the residual current circuit breaker provided by the embodiment of the application, an N pole of an existing circuit breaker product is provided with an arc extinguish chamber, and the space occupation ratio is large; this application embodiment sets up an arc extinguishing muscle at the N utmost point, and is effectual with electric arc isolation and extinguish, reduces the space ratio, improves the problem of circuit breaker product overall arrangement difficulty.

Drawings

Fig. 1 is a schematic structural diagram of an L-pole of a residual current circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an N-pole structure of a residual current circuit breaker according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a thermal trip mechanism according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.