CN108807089A - Breaker built in a kind of prepayment meter with short circuit breaking function - Google Patents

Abstract

The invention discloses a built-in circuit breaker of a prepaid electric energy meter with a short-circuit breaking function, which comprises a housing and a cover. The housing is provided with a deceleration motor, a guide wheel, a transmission device, an opening and closing control device, and an opening and closing control rack , movable hook, opening and closing rotating pull rod, moving contact device, outlet terminal, static contact device, oil filling port, control circuit, control gear; once the external coil of the circuit breaker detects a large current or short circuit, it can realize a quick short circuit Breaking function, and simultaneously break the zero line and the live line through double contacts; the shell and the cover are tightly connected through the sealing ring, using transformer oil or silicone oil or vacuuming as the arc extinguishing medium, which can realize the rapid arc extinguishing function; the moving contact The head and the static contact adopt the same surface contact method, which can effectively reduce the generation of closing arc; the opening and closing control device obtains the opening and closing and tripping detection signals through magnetic induction, and realizes fast synchronous opening and closing operation and automatic reclosing through the overall linkage gate function.

Description

A Built-in Circuit Breaker for Prepaid Energy Meter with Short Circuit Breaking Function

technical field

The invention relates to the technical field of a circuit breaker for a prepaid electric energy meter, in particular to a built-in circuit breaker for a prepaid electric energy meter with a short-circuit breaking function.

Background technique

There are three basic types of output control output methods for arrears power-off of existing prepaid electric energy meters: one is to realize power-off through the control circuit in the meter in the meter to control the relay in the circuit connected in series at the output end in the meter. The relay is easy to be burned due to its small contact capacity; the second is to control the shunt release outside the table through the control circuit in the meter or the relay, and then the shunt release controls the circuit breaker. The release needs to occupy the space of the meter box, and the hidden danger of electricity theft increases; the third is the control circuit inside the meter or the circuit breaker with the shunt tripping function set outside the meter and the relay control meter and installed between the meter and the user end. Since the third method can better meet the needs of large capacity and anti-stealing electricity, it is favored by the market.

Although the built-in switch of the traditional prepaid electric energy meter is small in size, it can realize functions such as automatic breaking of the arrears. For example, the invention patent 201210096980.0 discloses a special molded case circuit breaker for prepaid electric energy meters. Breaking; invention patent 201410467966.6 discloses a circuit breaker with prepaid function, which realizes automatic breaking and connecting functions. However, most of the built-in circuit breakers of traditional prepaid energy meters have the following problems: 1. They only have the switching function of rated capacity; Poor; 3 rated capacity is small. For this reason, the invention patent will realize the short-circuit breaking and arc extinguishing functions of the built-in circuit breaker of the prepaid electric energy meter through structural improvement, and at the same time have the remote automatic reclosing function.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and disclose a built-in circuit breaker of a prepaid electric energy meter with a short-break breaking function. In the case that the user renews the payment and connects to the power supply after the arrears are disconnected, it can realize automatic remote reclosing. It not only has the functions of arrears tripping and automatic reclosing, but also has short-circuit breaking and arc extinguishing functions, high performance reliability, and can The characteristics of meeting the design and use requirements of miniature circuit breakers, and further improving the structure, the structure is simpler, more reasonable, compact, smaller in size, improves the stability of the action, and has higher sensitivity.

In order to achieve the above object, the present invention adopts the following technical solution: a built-in circuit breaker of a prepaid electric energy meter with a short-break breaking function, including a housing 1 and a cover 2, and the housing 1 and the cover 2 are sealed by sealing The circuit breaker is tightly connected with the ring, and the circuit breaker is injected with transformer oil or silicone oil through the oil injection port 13, or through vacuuming in the housing, etc., to achieve short-circuit breaking capacity and arc extinguishing function.

The housing 1 is provided with a reduction motor 3, a guide wheel 4, a transmission device 5, an opening and closing control device 6, an opening and closing control rack 7, a movable hook 8, an opening and closing rotating pull rod 9, and a moving contact device 10. Outlet terminal 11, static contact device 12, oil filling port 13, control circuit device 14, control gear 15.

The geared motor 3 is installed inside the housing 1;

The guide wheel 4 is installed on the transmission shaft of the reduction motor 3, and meshes with the gear 501 on the transmission device 5;

Said transmission device 5 is cooperatively connected with the guide wheel 4 and the opening and closing control device 6;

The opening and closing control device 6 is composed of a linkage bump 601, a rack 602, a trip bump 603, and a state detection magnetic point 604 to mesh with the gear 502 on the transmission device;

The opening and closing control rack 7 is driven by the opening and closing control device 6;

The movable hook 8 is installed on the housing 1 and cooperates with the opening and closing control rack 7;

The opening and closing rotating pull rod 9 cooperates with the control gear 15;

The moving contact device 10 realizes opening and closing with the opening and closing rotating pull rod 9 and the control gear 15;

The outlet terminal 11 is mated with the casing 1;

The static contact device 12 is mated with the housing 1;

The oil filling port 13 is mated with the housing 1;

The control circuit device 14 is composed of a signal detection circuit, a signal processing circuit, a feedback loop and an output control circuit;

As preferably, the transmission device 5 is provided with a gear 501, a gear 502, and a transmission shaft 503, the gear 501 drives the transmission shaft 503 by cooperating with the guide wheel 4, the transmission shaft 503 drives the gear 502, and the gear 502 cooperates with the opening and closing control device 6 , to achieve fast synchronous breaking operation.

Preferably, the opening and closing control device 6 is provided with a linkage bump 601, a rack 602, a trip bump 603, and a state detection magnetic point 604, and a permanent magnet is placed at the state detection magnetic point 604 for Detect opening, closing and tripping signals.

Further preferably, the control circuit board 14 includes modules such as a central processing unit MCU, a drive motor, an opening and closing tripping detection circuit, a power step-down device, wherein the closing detection point A, the opening detection point B, and the tripping detection point C are respectively used as the key position points of the control gear state detection magnetic point detection to realize the remote signal automatic detection of the three states of closing, opening and tripping.

Further preferably, the circuit breaker has a large breaking distance, has a short-circuit breaking function, and can simultaneously break the zero line and the live line through double contacts.

More preferably, the circuit breaker is injected with transformer oil or silicone oil through the oil injection port 13, or through vacuuming the housing, etc., as the arc extinguishing medium of the circuit breaker to realize short-circuit breaking and arc extinguishing functions.

After adopting above-mentioned preferred scheme, the present invention obtains following beneficial effect:

With short-circuit breaking function, once the external coil of the circuit breaker detects a large current or short circuit, the short-circuit breaking function can be quickly realized, and the neutral line and live line can be broken at the same time through double contacts;

With arc extinguishing function, arc extinguishing can be realized by filling transformer oil or silicone oil in the housing, or quickly extinguishing arc by vacuuming the housing;

The rated capacity is large, the bearing capacity is large, and the separation distance is large.

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 General Assembly Drawing of Built-in Circuit Breaker of Prepaid Energy Meter

Figure 2 Assembly diagram of the built-in circuit breaker housing of the prepaid electricity meter

Figure 3 A-A cross-sectional view of the circuit breaker housing

Figure 4 Structural diagram of opening and closing control device

Figure 5 is the position diagram of the circuit board corresponding to the state detection magnetic point.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Figure 1 shows the general assembly diagram of the built-in circuit breaker of the prepaid electric energy meter, including the housing 1 and the cover 2, the housing 1 and the cover 2 are tightly connected through the sealing ring, and the circuit breaker is injected with transformer oil through the oil injection port 13 Or silicone oil, or by vacuuming the housing, etc., as the arc extinguishing medium of the circuit breaker to realize the functions of short circuit breaking and arc extinguishing.

Figure 2 shows the assembly diagram of the built-in circuit breaker housing of the prepaid electric energy meter, and Figure 3 is a cross-sectional view of the circuit breaker housing A—A. Control device 6, opening and closing control rack 7, movable hook 8, opening and closing rotating pull rod 9, moving contact device 10, outlet terminal 11, static contact device 12, oil filling port 13, control circuit device 14, control gear 15.

The geared motor 3 is installed inside the housing 1;

The guide wheel 4 is installed on the transmission shaft of the reduction motor 3, and meshes with the gear 501 on the transmission device 5;

Said transmission device 5 is cooperatively connected with the guide wheel 4 and the opening and closing control device 6;

The opening and closing control device 6 is composed of a linkage bump 601, a rack 602, a trip bump 603, and a state detection magnetic point 604 to mesh with the gear 502 on the transmission device;

The opening and closing control rack 7 is driven by the opening and closing control device 6;

The movable hook 8 is installed on the housing 1 and cooperates with the opening and closing control rack 7;

The opening and closing rotating pull rod 9 cooperates with the control gear 15;

The moving contact device 10 realizes opening and closing with the opening and closing rotating pull rod 9 and the control gear 15;

The outlet terminal 11 is connected with the casing 1, and the neutral wire and the live wire can be disconnected at the same time through the double contact;

The static contact device 12 is mated with the housing 1;

The oil filling port 13 is mated with the housing 1;

The control circuit device 14 is composed of a signal detection circuit, a signal processing circuit, a feedback loop and an output control circuit.

The structural diagram of the opening and closing control device shown in Figure 4, the opening and closing control device is provided with a linkage bump 601, a rack 602, a tripping bump 603, a state detection magnetic point 604, and a state detection magnetic point 604 is placed The permanent magnet and the tripping projection 603 are connected with the opening and closing control rack (7) through the movable hook 8 to realize the tripping function.

Figure 5 shows the position diagram of the circuit board corresponding to the state detection magnetic point, the opening detection point A, the closing detection point B, and the tripping detection point C are respectively used as the state detection magnetic point (604) detection key positions of the opening and closing control device The point is used to detect the opening and closing signals and tripping signals.

Although the embodiments disclosed in the present invention are as above, the described content is only an embodiment adopted for the convenience of understanding the present invention, and is not intended to limit the present invention. Anyone skilled in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention, The scope defined by the appended claims must still prevail.

Claims (6)

1. breaker built in a kind of pre-payment with short circuit breaking function, including shell and lid, it is characterised in that：

Be equipped in the shell and lid decelerating motor, guide wheel, transmission device, division brake control device, divide-shut brake control rack, Adjustable hook, divide-shut brake rotating tension bar, trigger device, outlet terminal, static contact head device, pouring orifice, control circuit, control tooth Wheel.

2. breaker built in the pre-payment with short circuit breaking function according to claim 1, it is characterised in that：

The external coil of breaker once detect high current or occur short-circuit conditions, breaker can send disjunction instruct to point Lock operating mechanism quickly disconnects moving contact, realizes rapid cut-off breaking function, and be provided simultaneously with long-range breaking function, and pass through Disjunction zero curve and firewire can be achieved at the same time in double contacts.

3. breaker built in the pre-payment with short circuit breaking function according to claim 1, it is characterised in that：

The shell and lid carry out close-coupled by sealing ring, using transformer oil or silicone oil or by being vacuumized in shell Etc. modes as arc-extinguishing medium, realize fast arc extinction function.

4. being existed according to breaker, feature built in the pre-payment with short circuit breaking function described in claim 1 or claim 2 In：

The moving contact of the breaker is coincide with static contact using the face way of contact, and the generation of combined floodgate electrical discharge arc is effectively reduced.

5. breaker built in the pre-payment with short circuit breaking function according to claim 1, it is characterised in that：

The division brake control device of the breaker is equipped with linkage convex block, dropout convex block, state-detection magnetic dot；State-detection magnetic dot Permanent magnet is laid at place, for detecting divide-shut brake signal and trip signal；Dropout convex block controls tooth by adjustable hook and divide-shut brake Item connects, and realizes tripping function；The division brake control device and guide wheel, divide-shut brake control rack, adjustable hook, transmission device, Gear is controlled, body linkage is formed, realizes Fast synchronization breaking-closing operating and long-distance automatic reclosure function.

6. being existed according to breaker, feature built in the pre-payment with short circuit breaking function described in claim 1 or claim 4 In：

The control circuit board of the breaker is by receiving the state-detection magnetic dot signal on division brake control device, by control electricity The program of road plate central processing unit controls, decelerating motor band moving gear positive and negative rotation, and small before accurately driving at critical point Gap acts immediately once detecting divide-shut brake signal, improves divide-shut brake sensitivity and the breaking capacity of breaker.