CN213845191U - Action release for circuit breaker - Google Patents

Abstract

An action release for a circuit breaker belongs to the technical field of circuit breakers. The circuit breaker comprises a circuit breaker operating mechanism, and the action release comprises a base, a first release unit, a second release unit and a push rod, wherein the first release unit and the second release unit are arranged on the base; the push rod is provided with a first driving end, a second driving end and a third driving end, the first driving end and the second driving end are formed at one end, facing the base, of the push rod and are in sliding fit with one side of the base, the third driving end is formed at one end, facing the circuit breaker operating mechanism, of the push rod, the first driving end and the second driving end are respectively matched with the first tripping unit and the second tripping unit, the third driving end is matched with the circuit breaker operating mechanism, when the first tripping unit or the second tripping unit is tripped, the circuit breaker operating mechanism is actuated to trip through the corresponding driving ends on the push rod, and when the circuit breaker operating mechanism is reset, the first tripping unit is actuated through the first driving end to reset the first tripping unit or the second tripping unit is actuated through the second driving end to reset the second tripping unit. The volume is reduced, the number of parts is reduced, the manufacturing cost is reduced, and the energy is saved.

Description

Action release for circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker, concretely relates to action release for circuit breaker.

Background

The action release is a general name of a leakage release, i.e., a leakage release unit, and an overcurrent release, i.e., an overcurrent release unit. The intelligent circuit breaker with residual current protection function, which is customarily called, generally comprises an intelligent overcurrent release and a residual current release, and the residual current release is also called a residual current release. Both overcurrent trips and residual current trips (i.e., "leakage trips") are disclosed in chinese patent documents, such as CN201084663U (overcurrent trip), CN209471911U (an overcurrent trip), CN104362051A (an overcurrent electromagnetic trip), CN102543607B (an overcurrent trip with self-locking function), CN205406444U (an overcurrent trip device), CN207966906U (a circuit breaker with residual current protection action), CN102436983B (auxiliary trip device of low-voltage circuit breaker), and CN208873692U (a leakage trip device of circuit breaker).

The intelligent overcurrent release comprises an intelligent overcurrent detection/setting unit and is also provided with an overcurrent action release, and the action mechanism of the intelligent overcurrent release is as follows: when the intelligent detection/setting unit detects the overcurrent exceeding the setting value, such as overload, short circuit, etc., the intelligent detection/setting unit sends a tripping instruction to the overcurrent action tripper to cause the overcurrent action tripper to generate tripping action, namely realize tripping and quickly break the circuit so as to achieve the purpose of protecting the line and the load, such as equipment as electric facilities.

The leakage release comprises a leakage detection/setting unit and also comprises a leakage action release, and the action mechanism of the leakage action release is as follows: when a leakage fault occurs in the circuit, the leakage unit detects that the leakage current exceeds a setting value, namely, an action instruction is sent to the leakage action release, the leakage action release acts to release and break the circuit breaker, and the purpose of quickly breaking the circuit to protect the circuit and the load such as equipment serving as an electric facility is achieved. The leakage release is also generally provided with a leakage indication function and a leakage alarm function. The leakage indication function means that the leakage action state and the leakage reset state of the circuit breaker can be indicated on the site of the circuit breaker, that is, the indication rod can be in the leakage action state and the leakage reset position, for which, see paragraphs 0045 to 0046 of the above-mentioned specification of CN 208873692U. The electric leakage indication function is usually combined with the electric leakage action release, and the position of the electric leakage indication function is changed along with the action of the electric leakage action release, so that the purpose of on-site indication is achieved; the leakage alarm function means that the leakage state of the circuit breaker can be indicated on the spot far away from the circuit breaker, the leakage alarm function is usually taken as an additional or auxiliary module and is usually hung on the side surface of the circuit breaker in an external hanging mode, and the leakage alarm function receives a state signal of a leakage unit and converts the state signal into on-off between terminals through an external terminal to feed back the leakage state to a remote place.

As is apparent from the above description, the leakage tripping device (i.e., the leakage tripping unit) is not shared by the overcurrent tripping device (i.e., the overcurrent tripping unit) because of the leakage indication function, and needs to be separately installed, but the technical measures of the separate installation have disadvantages: the overall volume of the circuit breaker is increased, and the occupied space is correspondingly increased; the increase in the number of parts increases the manufacturing cost of the circuit breaker and increases the cost, and also causes resource waste to some extent. In view of the foregoing, there is a need for reasonable improvements, and the solutions described below are made in this context.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a help with the tripping actuation function, electric leakage instruction function and the alarm function of electric leakage action trip unit and overcurrent action trip unit well to collect together and can embody excellent modularization effect and can reduce the volume and save the occupation and reduce spare part figure to the space and can simplify the structure, reduce manufacturing cost and save the action release for the circuit breaker of resource.

The task of the utility model is accomplished in this way, a circuit breaker is with action release, the circuit breaker include a circuit breaker operating device, the action release include a base, in order to form the state of corresponding relation about each other and set up a first trip unit I and a second trip unit II on the base, and set up a push rod on the base slidably; the push rod is provided with a first driving end I, a second driving end II and a third driving end III, the first driving end I and the second driving end II are formed at one end, facing the base, of the push rod and are in sliding fit with one side of the base, the third driving end III is formed at one end, facing the circuit breaker operating mechanism, of the push rod, the first driving end I and the second driving end II are respectively matched with the first tripping unit I and the second tripping unit II, the third driving end III is matched with the circuit breaker operating mechanism, when the first tripping unit I or the second tripping unit II are tripped, the circuit breaker operating mechanism is actuated through the corresponding driving ends on the push rod, and when the circuit breaker operating mechanism is reset, the first tripping unit I is actuated through the first driving end I to reset the first tripping unit I or the second tripping unit II is actuated through the second driving end II to enable the second tripping unit II to trip the second tripping unit And II, resetting.

In a specific embodiment of the present invention, the first tripping unit i and the second tripping unit ii each include a buckle rod and a lock rod disposed on the base, the buckle rod and the lock rod are connected to each other when the first tripping unit i is in the reset state, the buckle rod and the lock rod are disconnected from each other when the first tripping unit i is in the trip state, the buckle rod and the lock rod are connected to each other when the second tripping unit ii is in the reset state, and the buckle rod and the lock rod are disconnected from each other when the second tripping unit ii is in the trip state; a first connecting device is arranged between the buckle rod of the first tripping unit I and the first driving end I of the push rod, a second connecting device is arranged between the buckle rod of the second tripping unit II and the second driving end II of the push rod, when the first tripping unit I trips and the second tripping unit II keeps a reset state, the synchronous action of the buckle rod of the first tripping unit I and the first driving end I is realized through the first connecting device, and the relative movement of the buckle rod of the second tripping unit II and the second driving end II is realized through the second connecting device, when the second tripping unit II trips and the first tripping unit I keeps a reset state, the synchronous action of the buckle rod of the second tripping unit II and the second driving end II is realized through the second connecting device, and the relative movement of the buckle rod of the first tripping unit I and the first driving end I is realized through the first connecting device.

In another specific embodiment of the present invention, a first tripping unit installation cavity i and a second tripping unit installation cavity ii are arranged on the base up and down; the third driving end III extends towards the position where the circuit breaker operating mechanism is located, and the first driving end I and the second driving end II extend towards the position where the base is located in the direction opposite to the extending direction of the third driving end III.

In another specific embodiment of the present invention, the first tripping unit i and the second tripping unit ii each further include a magnetic flux acting portion fixed on the base, the buckle rod is slidably disposed on the base, the buckle rod is rotatably disposed on the base, a buckle return spring for connecting the buckle rod with the buckle rod is disposed on the buckle rod, and an action spring for driving the buckle rod to act after the buckle rod and the buckle rod are disconnected from each other is disposed on the buckle rod; the magnetic flux action part comprises a mandril which extends out when the magnetic flux action part is excited and retracts when the magnetic flux action part is reset; the buckle rod comprises an acting plate extending along the action direction of the top rod and a reset plate extending along the direction vertical to the action direction of the top rod.

In a further embodiment of the invention, a tripping chute extending in the direction of the action of the push rod is arranged on either the acting plate of the first tripping unit I or the first driving end I of the push rod, a first driving boss I is correspondingly arranged on one of a first driving end I of the push rod and an action plate of the first tripping unit I, the first connecting device is composed of the tripping chute and the first driving boss I accommodated in the tripping chute, a tripping chute extending along the action direction of the ejector rod is arranged on one of the action plate of the second tripping unit II and the second driving end II of the push rod, a second driving boss II is correspondingly arranged on one of the second driving end II of the push rod and the action plate of the second tripping unit II, the second connecting device consists of the tripping chute and the second driving boss II accommodated in the tripping chute; one end of the tripping chute is formed into an actuating end face, and the actuating end face is respectively matched with the first driving boss I and the second driving boss II in the tripping and resetting processes of the first tripping unit I and the second tripping unit II.

In still another specific embodiment of the present invention, the first tripping unit installation cavity i and the second tripping unit installation cavity ii are respectively provided with a chute extending along the action direction of the ejector rod, and the acting plate cooperates with the chute to make the first tripping unit i and the second tripping unit ii along the action direction of the ejector rod to slide.

In the utility model discloses a more and a concrete embodiment, first side I orientation of base first tripping unit installation cavity I and the position formation of second tripping unit installation cavity II are used for supplying respectively two hasp poles with first drive end I and II complex openings of second drive end, the leading flank of the perpendicular to spout of base with constitute in the tip of action board be used for the hasp pole and be in the spacing contact surface of gliding slip stroke cooperatees under action spring's the effect.

In yet another specific embodiment of the present invention, the front side surface is provided with a sliding opening for accommodating the push rod, and a sliding limiting portion is extended from a position corresponding to the sliding opening on the front side surface, and the sliding limiting portion is matched with a limiting groove formed on the push rod.

In the present invention, the first tripping unit mounting cavity i is provided with a signal output unit mounting cavity above, the signal output unit is actuated when the first tripping unit i trips and resets, and the tripping signal and the reset signal of the first tripping unit i are output.

In yet another specific embodiment of the present invention, the signal output unit includes an alarm conversion element fixed in the signal output unit installation cavity and an indication push rod slidably disposed in the signal output unit installation cavity, the indication push rod faces one side of the first tripping unit installation cavity i and is provided with a locking pin, and the locking pin passes through the opening at the bottom of the signal output unit installation cavity and then is connected to the hasp rod.

The utility model provides a technical scheme not only can reduce the volume and save the occupation to the space owing to will be as the first dropout unit I of leakage current action dropout unit and the dropout actuating function and the electric leakage instruction function and the alarming function of the second dropout unit II that act as overcurrent action dropout unit well integrate together and can embody excellent modularization effect, can reduce spare part figure moreover and make the structure more concise, reduce manufacturing cost and be favorable to saving the resource.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention.

Fig. 2 is a block diagram of the trip unit shown in fig. 1.

Fig. 3 is a structural view of a base of the trip unit shown in fig. 1 and 2.

Fig. 4 is a schematic view of the base shown in fig. 3, viewed from the right side.

Fig. 5 is a schematic diagram of the signal output unit shown in fig. 1 and 2.

Fig. 6a is a schematic diagram of an indicating push rod of the structural architecture of the signal output device shown in fig. 5.

Fig. 6b is a schematic view of the other side of fig. 6 a.

Fig. 7 is a detailed structural view of the push rod shown in fig. 1 and 2.

Fig. 8 is a specific component structure diagram of a first tripping unit i and a second tripping unit ii with the same structure.

FIG. 9 is a schematic view of the buckle lever shown in FIG. 8 viewed from another direction.

Fig. 10 is a schematic view of the indicator marks on the indicator push rod shown in fig. 6a and 6b cooperating with the marks on the panel of the cover of the circuit breaker.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, all possible concepts relating to the directions or orientations of up, down, left, right, front and rear are exemplified by the position state of the drawing being described, and thus, should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, the circuit breaker operating mechanism 6 of the structural architecture of the circuit breaker is shown, and since the structure and mechanism of action of the circuit breaker operating mechanism 6 are well known in the art, only the handle 61, lever 62 and breaker pull bar 63 of the structural architecture of the circuit breaker operating mechanism 6 are shown in fig. 1 of the applicant. A base 1 of the construction of the aforementioned action release, a first trip unit i 2 and a second trip unit ii 3 provided on the base 1 in a state of being vertically corresponding to each other, and a push rod 4 slidably provided on the base 1 are shown.

As the technical scheme provided by the utility model: the push rod 4 has a first driving end i 41, a second driving end ii 42 and a third driving end iii 43, the first driving end i 41 and the second driving end ii 42 are formed at one end of the push rod 4 facing the base 1, i.e. the right end of the position state shown in fig. 1, and are in sliding fit with one side of the base 1, i.e. the rear side of the position state shown in fig. 1, the third driving end iii 43 is formed at one end of the push rod 4 facing the circuit breaker operating mechanism 6, i.e. the left end of the position state shown in fig. 1, the first driving end i 41 and the second driving end ii 42 form a corresponding relationship with each other in the vertical direction and are respectively matched with the first tripping unit i 2 and the second tripping unit ii 3 at one side of the base 1, the third driving end iii 43 is matched with the circuit breaker operating mechanism 6, when the first tripping unit i 2 or the second tripping unit ii 3 is tripped, the circuit breaker operating mechanism 6 is actuated to trip (to be mentioned below) through the corresponding driving end of the push rod 4, and when the circuit breaker operating mechanism 6 is reset, the first tripping unit i 2 is actuated through the first driving end i 41 to reset the first tripping unit i 2, or the second tripping unit ii 3 is actuated through the second driving end ii 42 to reset the second tripping unit ii 3.

Please refer to fig. 5, fig. 6a, fig. 6b and fig. 8, it can be seen from the above description that: when an electric leakage fault occurs, the electric leakage fault release detects the electric leakage fault and sends an action signal to the first tripping unit I2, the first tripping unit I2 is tripped, the hasp rod 72 (shown in figure 8) of the first tripping unit I2 drives the push rod 4 to act, and the tripping surface 431 on the third driving end III 43 of the push rod 4 pushes the breaker draw rod 63 in the breaker operating mechanism 6 to rotate, so that the tripping of the breaker operating mechanism 6 is realized, the contact system of the breaker is driven to be opened, and the current is cut off. Meanwhile, due to the tripping of the first tripping unit i 2, the trip bar 72 drives the indicating push bar 52 in the signal output unit 5 to move, and the indicating push bar 52 triggers the triggering boss 511 of the alarm switching element 51, so that the contact state of the alarm switching element 51 changes, and outputs the tripping signal of the first tripping unit i 2, and on the other hand, the indicating push bar 52 matches with the mark on the circuit breaker surface cover through the indicating mark 522 (arrow mark) on the upper surface and shown in fig. 6a and 6b, and makes the tripping indication of the first tripping unit i 2.

When an overcurrent fault occurs, the overcurrent fault release detects the overcurrent fault and sends an action signal to the second tripping unit II 3, the second tripping unit II 3 trips, the tripping rod 72 of the second tripping unit II 3 drives the push rod 4 to act, and the tripping surface 431 on the third driving end III 43 of the push rod 4 pushes the breaker draw bar 63 in the breaker operating mechanism 6 to rotate, so that the breaker operating mechanism 6 trips, a contact system of the breaker is driven to be opened, and the current is cut off.

Referring to fig. 8, the first trip unit i 2 and the second trip unit ii 3 each include a latch lever 72 and a latch lever 73 disposed on the base 1, the latch lever 72 and the latch lever 73 are connected to each other when the first trip unit i 2 is in the reset state, the latch lever 72 and the latch lever 73 are disconnected from each other when the first trip unit i 2 is in the trip state, the latch lever 72 and the latch lever 73 are connected to each other when the second trip unit ii 3 is in the reset state, and the latch lever 72 and the latch lever 73 are disconnected from each other when the second trip unit ii 3 is in the trip state; a first connecting device (to be described later) is arranged between the buckle rod 72 of the first tripping unit i 2 and the first driving end i 41 of the push rod 4, a second connecting device (to be described later) is arranged between the buckle rod 72 of the second tripping unit ii 3 and the second driving end ii 42 of the push rod 4, when the first tripping unit i 2 trips and the second tripping unit ii 3 keeps a reset state, the synchronous action of the buckle rod 72 of the first tripping unit i 2 and the first driving end i 41 is realized through the first connecting device, the relative movement of the buckle rod 72 of the second tripping unit ii 3 and the second driving end ii 42 is realized through the second connecting device, and when the second tripping unit ii 3 trips and the first tripping unit i 2 keeps the reset state, the synchronous action of the buckle rod 72 of the second tripping unit ii 3 and the second driving end ii 42 is realized through the second connecting device, and the first tripping unit is realized through the first connecting device Relative movement of the buckle lever 72 of i 2 and the first driving end i 41.

Therefore, the utility model discloses an action of first dropout unit I2 and second dropout unit II 3 all transmits for circuit breaker operating device 6 through same root push rod 4, otherwise also transmits for first dropout unit I2 and second dropout unit II 3 through same root push rod 4 in resetting of circuit breaker operating device 6. The mutual interference between the first tripping unit I2 and the second tripping unit II 3 in the process of actuating the circuit breaker operating mechanism 6 to trip after the first tripping unit I2 trips the actuating push rod 4 is avoided, and the mutual interference between the second tripping unit II 3 and the first tripping unit I2 in the process of actuating the circuit breaker operating mechanism 6 to trip after the second tripping unit II 3 trips the actuating push rod 4 is avoided. The first tripping unit I2 is actuated after the circuit breaker operating mechanism 6 resets the actuating push rod 4, and the first tripping unit I2 is not interfered in the resetting process, and the second tripping unit II 3 is actuated after the circuit breaker operating mechanism 6 resets the actuating push rod 4, and the second tripping unit II 3 is not interfered in the resetting process.

Referring to fig. 2 to 4, a first tripping unit mounting cavity i 12 and a second tripping unit mounting cavity ii 13 are disposed on the base 1; the third driving end iii 43 extends towards the position of the breaker operating mechanism 6 (see fig. 1), and the first driving end i 41 and the first driving end ii 42 extend towards the position of the base 1 in a direction opposite to the extending direction of the third driving end iii 43, in this embodiment, extend to the same side surface, i.e., the first side surface i 102, of the first tripping unit installation cavity i 12 and the second tripping unit installation cavity 13 ii in the same direction, of course, the first driving end i 41 and the first driving end ii 42 may also extend to two different side surfaces of the two installation cavities, i.e., the first driving end i 41 extends to the first side surface i 102 (shown in fig. 3) and the first driving end ii 42 extends to the second side surface ii 1021 (shown in fig. 4).

Referring to fig. 5 in conjunction with fig. 2 to 4, the present invention further includes a signal output unit 5 disposed on the base 1, a signal output unit mounting cavity 11 is disposed above the first tripping unit mounting cavity i 12 of the base 1, the signal output unit 5 illustrated in fig. 1, 2 and 5 is disposed in the signal output unit mounting cavity 11, and the signal output unit 5 is actuated when the first tripping unit i 2 is tripped and reset, so that the signal output unit 5 outputs a tripping signal and a reset signal of the first tripping unit i 2. Therefore, the action tripping unit comprises a base 1, a first tripping unit I2, a second tripping unit II 3 and a signal output unit 5.

As shown in fig. 3 and 4 in detail, the signal output unit installation cavity 11, the first tripping unit installation cavity i 12, and the second tripping unit installation cavity ii 13 form a hierarchical relationship from top to bottom on the base 1, a first partition plate is provided between the signal output unit installation cavity 11 and the first tripping unit installation cavity i 12, the signal output unit installation cavity 11 is provided on the first partition plate, the signal output unit installation cavity 11 includes an alarm element installation cavity 108 for installing an alarm conversion element 51 and an indication push rod chute 107 for allowing an indication push rod 52 to slide, and a bottom opening 106 for communicating the signal output unit installation cavity 11 with the first tripping unit installation cavity i 12 is provided at the bottom of the indication push rod chute 107. The second layer of partition plate is used as a partition plate between the first tripping unit installation cavity I12 and the second tripping unit installation cavity II 13, the third layer of partition plate is used as a bottom plate of the second tripping unit installation cavity II 13, and the two partition plates and the bottom plate are arranged in parallel. Base 1 still has the first side I102 and the leading flank 103 (shown in fig. 3) of the above-mentioned three (three) boards of perpendicular to, and first tripping unit installation cavity I12 and second tripping unit installation cavity II 13 all link up first side I102 for first tripping unit installation cavity I12 and second tripping unit installation cavity II 13 all form uncovered in first side I102, and the first tripping unit I2 of being convenient for and second tripping unit II 3 cooperate with push rod 4 respectively. A spring through hole 1031 is formed in the side, facing the mounting cavity, of the front side surface 103 adjacent to the first side surface i 102 and corresponding to the first tripping unit mounting cavity i 12 and the second tripping unit mounting cavity ii 13 respectively, and a limiting groove 1032 is formed in the side, facing away from the mounting cavity, of the front side surface 103 respectively and correspondingly. The front side surface 103 is further provided with a slide opening 104, and a slide stopper 105 is extended from the front side surface 103 at a position corresponding to the slide opening 104. A slide groove 101 extending in the direction of operation of a jack 711 (shown in fig. 8) to be described below is provided in each of the first trip unit mounting chamber i 12 and the second trip unit mounting chamber ii 13 and on the top and bottom surfaces of the chambers.

As can be seen from the foregoing description and from the schematic illustration of fig. 8, the first trip unit 2 and the second trip unit 3 have the same structure and each further includes a magnetic flux operating portion 71 fixed on the base 1, the latch lever 72 is slidably disposed on the base 1, the latch lever 73 is rotatably disposed on the base 1, a latch return spring 74 is disposed between the latch lever 73 and the base 1, and an operating spring 75 is disposed between the latch lever 72 and the base 1.

The magnetic flux operating portion 71 is fixed in the trip unit mounting cavity, and the magnetic flux operating portion 71 includes a push rod 711 that extends (may also be referred to as "extending") when the magnetic flux operating portion 71 is energized and retracts when reset.

The aforementioned buckle lever 72 includes an acting plate 721 extending in the action direction of the top bar 711 and a returning plate 722 extending in the direction perpendicular to the action direction of the top bar 711. A trip link 723 extending in the operating direction of the push rod 711 is provided on each of the action plates 721 of the first trip unit i 2 and the second trip unit ii 3, and one end of the trip link 723 constitutes an actuating end surface 7231.

Referring to fig. 9, three pairs of bosses 724 extend from (i.e., extend from) the latch bar 72, one boss and the other boss of each pair of bosses 724 are correspondingly disposed on the upper side and the lower side of the latch bar 72, respectively, and the bosses 724 are engaged with the slide groove 101. One end of the operating spring 75 is hooked on the operating spring mounting portion 727 of the buckle lever 72, and the other end is hooked on the spring shaft 1033 accommodated in the stopper groove 1032 after passing through the spring through hole 1031. The side of the buckle rod 72 facing the first layer of partition plates is also provided with a driving boss 726 for cooperating with the signal output unit 5. The buckle lever 72 is further provided with a buckle face 725 for engaging with the buckle lever 73, and the end of the action plate 721 forms a limit contact face 7211 for engaging with the front side 103. As can be seen from the figure, the acting plate 721 is engaged with the slide groove 101 so that the latch levers 72 of the first trip unit i 2 and the second trip unit ii 3 can slide along the operating direction of the push lever 711.

As shown in fig. 8, the latch lever 73 includes a pair of striking rods 731 arranged in parallel, a connecting rod 732 connecting the pair of striking rods 731, and a latch action rod 733 formed by extending the striking rod 731 on one of the pair of striking rods 731, one end of the pair of striking rods 731 close to the connecting rod 732 is provided with a rotating shaft hole, the rotating shaft 76 passes through the rotating shaft hole to rotatably arrange the latch lever 73 in the installation cavity, the rotating shaft 76 is provided with a latch return spring 74 in a penetrating manner, one end of the latch return spring abuts against the outer side (the right side of the position state shown in fig. 8) of the connecting rod 732, and the other end abuts against the second-layer partition or the bottom plate, as shown in fig. 2. The latch return spring 74 is used to provide a force tending to rotate the latch lever 73 clockwise toward the position shown in fig. 8 so that the latch face 7331 on the latch actuating lever 733 of the latch lever 73 and the latch face 725 on the latch lever 72 remain latched.

Referring to fig. 7 in conjunction with fig. 1-2 (fig. 2 is a schematic view of fig. 1 from the rear side), the above has been mentioned: the push rod 4 comprises a first driving end I41 matched with the first tripping unit I2, a second driving end II 42 matched with the second tripping unit II 3 and a third driving end III 43 matched with the circuit breaker operating mechanism 6, wherein the third driving end III 43 extends to the position of the circuit breaker operating mechanism 6, the first driving end I41 and the first driving end II 42 extend towards the direction opposite to the extending direction of the third driving end III 43 and extend to a first side surface I102 in the same direction of the first tripping unit mounting cavity I12 and the second tripping unit mounting cavity II 13. A first driving boss i 411 is arranged on the first driving end i 41 of the push rod 4, a second driving boss ii 421 is arranged on the second driving end ii 42 of the push rod 4, the first driving boss i 411 is accommodated in the tripping chute 723 of the first tripping unit i 2, and the second driving boss ii 421 is accommodated in the tripping chute 723 of the second tripping unit ii 3 (shown in fig. 8). In the tripping and resetting processes of the first tripping unit i 2 and the second tripping unit ii 3, the actuating end surface 7231 cooperates with the two driving bosses, namely, the first driving boss i 411 and the second driving boss ii 421. A tripping surface 431 (fig. 7, also called a tripping flange) for actuating the breaker traction bar 63 and a reset contact surface 432 (fig. 7) actuated by the lever of the breaker operating mechanism 6 are provided on the third drive end iii 43, and the push rod 4 is provided at its bottom in its operating direction with a limit groove 401 which cooperates with a slide limit portion 105 provided on the base. Therefore, the first connecting device, namely the first connecting device, is composed of a tripping chute 723 on the first tripping unit i 2 and a first driving boss i 411 accommodated in the tripping chute 723, and forms a sliding pair relationship; the second connecting device, namely the second connecting device, is composed of a tripping chute 723 on the second tripping unit ii 3 and a second driving boss ii 421 accommodated in the tripping chute 723, and forms a sliding pair relationship. During the tripping and resetting operations of the first tripping unit i 2 and the second tripping unit ii 3, the actuating end surface 7231 cooperates with the first driving boss i 411 and the second driving boss ii 421.

Referring to fig. 5, 6a and 6b, the signal output unit 5 includes an alarm converting element 51 fixed in the signal output unit mounting cavity 11 and an indicating push rod 52 slidably disposed in the signal output unit mounting cavity 11, a locking pin 521 is extended from a side of the indicating push rod 52 facing the first tripping unit mounting cavity i 12, and the locking pin 521 passes through the opening 106 at the bottom of the signal output unit mounting cavity 11 and then is connected to the driving boss 726 of the latch lever 72.

Referring to fig. 10, fig. 10 shows a cover 91 of the circuit breaker 9, a panel 911 is provided on the cover 91, a leakage operation indicator 9111 and a leakage reset indicator 9112 are provided on the panel 911, and the indicator 522 in fig. 6a and 6b corresponds to an opening 9113 (also referred to as a window) provided in the panel 911.

The applicant describes the action process of the present invention with reference to fig. 1 to 2 and 5 to 10: the position shown in fig. 1 is taken as an example for both the front and rear in the operation direction.

Initially, the circuit breaker is in the on (closed) state, and the action release is in the reset state: the hasp rod 72 and the hasp rod 73 in the tripping unit are in a hasp state, and at the moment, the push rod 4 cannot act on the breaker draw bar 63, namely, the breaker draw bar 63 cannot be rotated to trip. Since the latch lever 72 is locked by the latch lever 73, the operating spring 75 is extended to store energy. The indication push rod 52 is positioned at the rear, the contact of the alarm switching element 51 is compressed, the alarm switching element 51 is in a reset state, the public lead 53 is connected with the first switching lead 55, and the public lead 53 is disconnected with the second switching lead 54; the aforementioned indication mark indicates the leakage reset state.

When an electric leakage fault acts, a magnetic flux action part 71 in a first tripping unit I2 serving as an electric leakage tripping unit is locked and is operated by a signal instruction, a top rod 711 extends to push a striking rod 731 to extend, a locking rod 73 rotates against the acting force of a locking return spring 74 to unlock the locking rod 73 and a buckle rod 72, the buckle rod 72 slides under the action of an action spring 75 until a limit contact surface 7211 is contacted with a front side surface 103 (an inner wall of a mounting cavity) and stops, the sliding direction of the buckle rod 72 is opposite to the extending direction of the top rod 711, so that on one hand, a return plate 722 of the buckle rod 72 acts on the top rod 711 to reset the top rod, on the other hand, an action plate 721 pushes a first driving boss I411 through an actuating end surface 7231 to synchronously slide the push rod 4 forwards, and a tripping surface 431 of the push rod is contacted with a circuit breaker traction rod 63 to push the circuit breaker traction rod to unlock the circuit breaker. Meanwhile, the indication push rod 52 slides forwards synchronously with the slide of the buckle rod 72, and the indication mark 522 moves forwards synchronously to indicate the electric leakage action state; the contact of the alarm switch element 51 is switched to the released state, the alarm switch element 51 is switched to the activated state, the common conductor 53 and the first switch conductor 55 are disconnected, and the common conductor 53 and the second switch conductor 54 are connected. In the process, the first tripping unit i 2 is tripped, the circuit breaker operating mechanism 6 is actuated to trip through the corresponding driving end on the push rod 4, the second tripping unit ii 3 serving as the overcurrent tripping unit is still in the reset state, and the second driving boss ii 421 of the push rod 4 is out of contact with the rear end face of the tripping chute of the second tripping unit ii 3, namely the aforementioned actuating end face 7231, and slides forward in the tripping chute 723.

When the circuit breaker is buckled again after the leakage fault is relieved, the lever 62 is driven to rotate by the handle 61 (namely, the handle of the circuit breaker) to push the reset contact surface 432 of the push rod 4 to resist the action of a tripping spring (not shown in the prior art) and push the push rod 4 to slide backwards, the first driving boss I411 is in contact with the rear end surface of the tripping chute of the first tripping unit I2, namely the actuating end surface 7231, and pushes the tripping rod 72 to slide backwards, so that the tripping rod 73 is buckled again, the action spring 75 elongates the stored energy, and the tripping surface 431 of the push rod 4 is separated from the traction rod 63 of the circuit breaker. The indicating push rod 52 slides backwards synchronously along with the sliding of the buckle rod 72, and the indicating mark 522 moves backwards synchronously to indicate the electric leakage reset state; the contact of the alarm switch element 51 is compressed, the alarm switch element 51 is switched to the reset state, the common line 53 is connected to the first switch line 55, and the common line 53 is disconnected from the second switch line 54. At this time, the second tripping unit ii 3 is in a reset state, and the second driving boss ii 421 of the push rod 4 slides backwards in the tripping chute 723 of the second tripping unit ii 3 until contacting with the rear end surface, i.e., the actuating end surface 7231 thereof.

When an overcurrent fault acts, a magnetic flux action part in the second tripping unit II 3 obtains a signal instruction to act, the lock catch is unlocked, the hasp rod 72 slides forwards under the action of the action spring 75 until the limiting contact surface is contacted with the base and stops, the push rod 4 synchronously slides forwards under the action of the hasp rod 72 of the tripping unit II 3, the tripping surface of the push rod is contacted with the draw bar of the circuit breaker and pushes the draw bar of the circuit breaker to unlock, and the circuit breaker trips. Meanwhile, the first tripping unit I2 is still in a reset state, and the first driving boss I411 of the push rod 4 is separated from contact with the rear end face of the tripping chute of the first tripping unit I2 and slides forwards in the tripping chute. Since the first trip unit i 2 is in the reset state, the latch lever 72 thereof is not actuated, and thus the indicating push rod 52 linked therewith is not actuated, the indicating mark 522 is not actuated, and the reset state is still indicated, and the alarm converting member 51 is not actuated.

When the breaker is buckled again after the overcurrent fault is relieved, the lever 62 moves backwards to be in contact with the reset contact surface 432 of the push rod 4 and resist the action of the action spring 75, the push rod 4 is pushed to slide backwards, the second driving boss II 421 is in contact with the rear end surface of the tripping chute of the second tripping unit II 3 and pushes the buckling rod 72 of the second tripping unit II to slide backwards, the second driving boss is buckled with the buckling rod 73 again, the action spring 75 stretches the stored energy, and the tripping surface 431 of the push rod 4 is separated from the breaker traction rod 63. In the process, the first tripping unit I2 is in a reset state, and the first driving boss I411 of the push rod 4 slides backwards in the tripping chute of the first tripping unit I2 until the first driving boss is contacted with the rear end face of the first tripping unit I2. Indicating that the push rod 52 is not actuated, the aforementioned indicator mark 522 is not actuated, and still indicating a reset state; the alarm converting element 51 is not actuated.

The utility model discloses a first trip unit I2 and second trip unit II 3 each other form the state setting of corresponding relation from top to bottom, take the coordinate of the circuit breaker shown in fig. 10 as an example, x is the width direction of circuit breaker, y is the length direction of circuit breaker, z is the direction of height of circuit breaker, be not limited to the upper and lower range upon range of setting in the circuit breaker direction of height (z direction) in above-mentioned embodiment, also can be on the same height of circuit breaker and arrange about the x direction, also can make and arrange around the y direction on the same height of circuit breaker, so correspondingly, both first drive end I41 and second drive end II 42 on push rod 4 can arrange about the x direction, or arrange around the y direction. The first and second connecting devices are not limited to the above-described embodiments, and may be, for example, driving bosses provided on the buckle lever 72 and tripping chutes provided on the push rod 4.

To sum up, the utility model provides a circuit breaker is with action release, it is second trip unit II 3 that overcurrent action release is promptly and electric leakage action release be the tripping actuation of first trip unit I2 and electric leakage instruction function and alarming function integration in a module, install (be divided into the three-layer) through a base 1 promptly (first layer installation alarm signal, instruction function module, the first trip unit of electric leakage fault action is corresponding in the installation of second layer, the second trip unit of overcurrent fault action is corresponding in the installation of third layer), and through same push rod 4 (the push rod has the three end, be respectively with circuit breaker operating device matched with third end, with first trip unit I2 matched with first end and with second trip unit II 3 matched with third end) accomplish the tripping actuation and reset, small in size, the part is few.

Claims (10)

1. A trip unit for a circuit breaker, said circuit breaker including a circuit breaker operating mechanism (6), said trip unit characterized by: the action release comprises a base (1), a first release unit I (2), a second release unit II (3) and a push rod (4), wherein the first release unit I and the second release unit II are arranged on the base (1) in a state of forming up-down corresponding relation with each other, and the push rod (4) is arranged on the base (1) in a sliding manner; the push rod (4) is provided with a first driving end I (41), a second driving end II (42) and a third driving end III (43), the first driving end I (41) and the second driving end II (42) are formed at one end, facing the base (1), of the push rod (4) and are in sliding fit with one side of the base (1), the third driving end III (43) is formed at one end, facing the circuit breaker operating mechanism (6), of the push rod (4), the first driving end I (41) and the second driving end II (42) are respectively matched with the first tripping unit I (2) and the second tripping unit II (3), the third driving end III (43) is matched with the circuit breaker operating mechanism (6), and when the first tripping unit I (2) or the second tripping unit II (3) are tripped, the circuit breaker operating mechanism (6) is actuated to trip through the corresponding driving ends of the push rod (4), when the circuit breaker operating mechanism (6) is reset, the first tripping unit I (2) is actuated through the first driving end I (41) to reset the first tripping unit I (2) or the second tripping unit II (3) is actuated through the second driving end II (42) to reset the second tripping unit II (3).

2. The action release for the circuit breaker according to claim 1, characterized in that the first tripping unit I (2) and the second tripping unit II (3) respectively comprise a tripping lever (72) and a locking lever (73) which are arranged on the base (1), the tripping lever (72) and the locking lever (73) are connected with each other when the first tripping unit I (2) is in a reset state, the tripping lever (72) and the locking lever (73) are disconnected with each other when the first tripping unit I (2) is in a tripping state, the tripping lever (72) and the locking lever (73) are connected with each other when the second tripping unit II (3) is in a reset state, and the tripping lever (72) and the locking lever (73) are disconnected with each other when the second tripping unit II (3) is in a tripping state; a first connecting device is arranged between a hasp rod (72) of the first tripping unit I (2) and a first driving end I (41) of the push rod (4), a second connecting device is arranged between a hasp rod (72) of the second tripping unit II (3) and a second driving end II (42) of the push rod (4), when the first tripping unit I (2) trips and the second tripping unit II (3) keeps a reset state, the synchronous action of the hasp rod (72) of the first tripping unit I (2) and the first driving end I (41) is realized through the first connecting device, the relative movement of the hasp rod (72) of the second tripping unit II (3) and the second driving end II (42) is realized through the second connecting device, and when the second tripping unit II (3) trips and the first tripping unit I (2) keeps the reset state, the hasp rod (72) and the second driving end II (42) of the second tripping unit II (3) are realized through the second connecting device II (42) to realize relative movement of the hasp rod (72) of the first tripping unit I (2) and the first driving end I (41) through the first connecting device.

3. The action release for the circuit breaker according to claim 2, characterized in that a first release unit mounting cavity I (12) and a second release unit mounting cavity II (13) are arranged on the upper and lower parts of the base (1); the third driving end III (43) extends towards the position of the breaker operating mechanism (6), and the first driving end I (41) and the second driving end II (42) extend towards the position of the base (1) in the direction opposite to the extending direction of the third driving end III (43).

4. The action release for the circuit breaker according to claim 3, characterized in that the first tripping unit I (2) and the second tripping unit II (3) each further comprise a magnetic flux action part (71) fixed on the base (1), the buckle lever (72) is slidably arranged on the base (1), the buckle lever (73) is rotatably arranged on the base (1), a buckle return spring (74) for connecting the buckle lever (73) with the buckle lever (72) is arranged on the buckle lever (73), and an action spring (75) for driving the buckle lever (72) to act after the buckle lever (72) and the buckle lever (73) are disconnected from each other is arranged on the buckle lever (72); the magnetic flux action part (71) comprises a top rod (711), and the top rod (711) extends when the magnetic flux action part (71) is energized and retracts when the magnetic flux action part is reset; the buckle rod (72) comprises an acting plate (721) extending along the action direction of the top rod (711) and a resetting plate (722) extending along the direction perpendicular to the action direction of the top rod (711).

5. The action release for the circuit breaker according to claim 4, characterized in that one of the action plate (721) of the first release unit I (2) and the first driving end I (41) of the push rod (4) is provided with a release chute (723) extending along the action direction of the push rod (711), one of the first driving end I (41) of the push rod (4) and the action plate (721) of the first release unit I (2) is correspondingly provided with a first driving boss I (411), the connecting device one is composed of the release chute (723) and the first driving boss I (411) accommodated in the release chute (723), one of the action plate (721) of the second release unit II (3) and the second driving end II (42) of the push rod (4) is provided with a release chute (723) extending along the action direction of the push rod (711), a second driving boss II (421) is correspondingly arranged on one of a second driving end II (42) of the push rod (4) and an acting plate (721) of the second tripping unit II (3), and the second connecting device is composed of the tripping chute (723) and the second driving boss II (421) accommodated in the tripping chute (723); one end of the tripping chute (723) is formed into an actuating end surface (7231), and the actuating end surface (7231) is respectively matched with the first driving boss I (411) and the second driving boss II (421) in tripping and resetting processes of the first tripping unit I (2) and the second tripping unit II (3).

6. The trip unit release of claim 5, wherein the first trip unit mounting chamber I (12) and the second trip unit mounting chamber II (13) are respectively provided with a slide groove (101) extending in the operating direction of the top bar (711), and the operating plate (721) cooperates with the slide grooves (101) to enable the trip bars (72) of the first trip unit I (2) and the second trip unit II (3) to respectively slide in the operating direction of the top bar (711).

7. The action release for the circuit breaker according to claim 6, characterized in that the first side surface I (102) of the base (1) facing the first tripping unit mounting cavity I (12) and the second tripping unit mounting cavity II (13) forms openings for the two buckle rods (72) to be respectively matched with the first driving end I (41) and the second driving end II (42), and the front side surface (103) of the base (1) perpendicular to the sliding chute (101) is matched with a limit contact surface (7211) formed at the end of the acting plate (721) for limiting the sliding stroke of the buckle rods (72) under the action of the action spring (75).

8. The action release for the circuit breaker according to claim 7, wherein the front side surface (103) is provided with a sliding opening (104) for accommodating the push rod (4), a sliding limiting portion (105) is extended from the front side surface (103) at a position corresponding to the sliding opening (104), and the sliding limiting portion (105) is matched with a limiting groove (401) formed on the push rod (4).

9. The trip unit of claim 3, 6 or 7, further comprising a signal output unit (5) mounted on the base (1), wherein a signal output unit mounting cavity (11) is provided above the first trip unit mounting cavity I (12) of the base (1), and the signal output unit (5) is actuated to output the trip signal and the reset signal of the first trip unit I (2) when the first trip unit I (2) is tripped or reset.

10. The action release for the circuit breaker according to claim 9, wherein the signal output unit (5) comprises an alarm conversion element (51) fixed in the signal output unit mounting cavity (11) and an indication push rod (52) slidably arranged in the signal output unit mounting cavity (11), a clamping pin (521) is extended from one side of the indication push rod (52) facing the first tripping unit mounting cavity i (12), and the clamping pin (521) passes through an opening (106) at the bottom of the signal output unit mounting cavity (11) and then is connected with the buckle rod (72).

Images