CN211088156U - Vacuum contactor - Google Patents

Abstract

The utility model discloses a vacuum contactor, including the glass shell, be equipped with the conducting rod on the glass shell, the conducting rod is equipped with the stationary contact in the glass shell, the one end of conducting rod in the glass shell is equipped with the movable contact, two the conducting rod is connected with first locating plate and second locating plate respectively, the second locating plate is connected with the current conducting plate through the flexible conductor electricity, first locating plate is connected with the insulation board, be connected with control structure on the insulation board, the second locating plate is connected with supplementary connecting device. The utility model discloses set up the permanent magnet and replace the spring as the driven component of device, thereby discharge at the combined floodgate of sound contact mutual contact, prevented the inefficacy of spring among the prior art, through converting the rigidity impact into the impact force that the flexible impact has also reduced the switch-on, the contact condition of sound contact is judged to the laminating state through two observation pieces to avoid long-time dislocation contact to influence the switch-on state of motor.

Description

Vacuum contactor

Technical Field

The utility model relates to an electrical equipment control technical field especially relates to a vacuum contactor.

Background

The vacuum contactor utilizes a vacuum arc extinguish chamber to extinguish arc, is used for frequently switching on and switching off normal working current, is usually used for remotely switching on and switching off medium and low voltage medium and high voltage alternating current motors with frequent start and stop of 660V, 1140V and the like, and mainly comprises the vacuum arc extinguish chamber and an operating mechanism. The vacuum arc-extinguishing chamber has two functions of reliably extinguishing arc when normal working current is passed and working current is frequently cut off. But not to cut off overload and short-circuit currents. The operating mechanism is composed of a holding coil with an iron core and an armature. Energizing the coil to attract the armature and closing the contactor; and when the coil loses power, the contactor is disconnected. The holding coil generally has two forms of direct current and alternating current.

The process requirement is very high when the vacuum arc-extinguishing chamber of the vacuum contactor is manufactured, and if the process is poor, the vacuum degree of the arc-extinguishing chamber is easy to reduce; contact material is not good, can appear "the overvoltage that dams" phenomenon when breaking electric current, uses the spring to realize the reset action to the break-make electricity among the prior art simultaneously, owing to become invalid easily or the effect variation that resets after the live time overlength to can produce great impact when the sound electrocution contacts, influence good contact between the two, and increased arc extinguishing resistance, take place to hold back overvoltage phenomenon simultaneously easily, based on this, the utility model relates to a vacuum contactor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a vacuum contactor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vacuum contactor comprises a glass shell, wherein conductive rods penetrate through the upper end and the lower end of the glass shell, one end, located on the upper side of the glass shell, of each conductive rod in the glass shell is provided with a stationary contact, one end, located on the lower side of the glass shell, of each conductive rod in the glass shell is provided with a movable contact, the two conductive rods are fixedly connected with a first positioning plate and a second positioning plate respectively at one ends outside the glass shell, the second positioning plate is electrically connected with a conductive plate through a flexible lead, the first positioning plate and the conductive plate are both connected with external copper bars, the first positioning plate and the conductive plate are fixedly connected with an insulating plate together, the insulating plate is connected with a control structure for controlling the mutual contact and separation of a moving electric shock, and the bottom of the second positioning plate is connected with an auxiliary connecting device.

Preferably, supplementary connecting device includes transmission structure and location structure, transmission structure is including the spring of welding in second locating plate bottom, the one end welding that the second locating plate was kept away from to the spring has the transmission piece, the bottom of transmission piece is connected with the lever, the lever has two mutually perpendicular's lever arm, one the lever arm rotates with the transmission piece to be connected, another the lever arm is parallel with the insulation board, the junction of two lever arms of lever rotates and is connected with the location axle, the location axle is connected fixedly with external fixed station.

Preferably, the control structure comprises an electromagnet, the electromagnet is welded on one side of the insulating plate far away from the glass shell, and a permanent magnet is glued on one side, parallel to the insulating plate, of the lever arm close to the electromagnet.

Preferably, location structure includes two locating levers, two the locating lever is established respectively on first locating plate and second locating plate, and the one end that two locating levers are close to each other all is provided with an observation piece, two one side that the observation piece is close to each other all is equipped with magnet.

Preferably, the transmission block is made of an insulating material, the conductive rod provided with the stationary contact is provided with a shielding cover, and the conductive rod provided with the movable contact is externally sleeved with a corrugated pipe.

Preferably, the magnet structure between the two observation sheets is an annular structure and is in a mutually-attached state, the first positioning plate is welded with the corresponding positioning rod, and the second positioning plate is movably connected with the corresponding positioning rod.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses a set up the permanent magnet and replace the spring as device driven component, when the electro-magnet is not electrified, can make a lever arm that the permanent magnet drove the lever be close to the electro-magnet direction removal under the attraction of ferromagnetic substance on the permanent magnet to the electro-magnet, make the conducting rod move down, sound contact separation, when the electro-magnet circular telegram, one side that sets up electro-magnet and permanent magnet and be close to each other is homopolar, under homopolar repellent's principle, make the permanent magnet drive the lever arm and do the motion of keeping away from the electro-magnet, make the conducting rod shift up, thereby sound contact mutual contact combined floodgate discharges, the inefficacy of spring among the prior art has been prevented, through with rigid shock conversion flexible impact when also having reduced the switch-on, because the powerful impact damage.

2. The utility model discloses the volume sets up auxiliary connection device simultaneously, the observation piece on two locating levers passes through magnet inter attraction, and locating lever and second locating plate swing joint that lie in, when the second locating plate takes place the dislocation under the effect of spring, but self-resuming regulation under small state, can make two observation pieces present the state of dislocation when the skew is obvious, the contact state of sound contact is judged to the laminating state of two observation pieces of accessible this moment, thereby avoid long-time dislocation contact to influence the switch-on state of motor, perhaps take place the phenomenon of contact failure.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum contactor according to the present invention;

fig. 2 is a top view of a second positioning plate in a vacuum contactor according to the present invention;

fig. 3 is a schematic structural diagram of an observation plate in a vacuum contactor according to the present invention.

In the figure: 1 glass shell, 2 conducting rods, 3 stationary contacts, 4 moving contacts, 5 shielding cases, 6 second positioning plates, 7 first positioning plates, 8 springs, 9 transmission blocks, 10 levers, 11 permanent magnets, 12 electromagnets, 13 insulating plates, 14 positioning rods and 15 observation pieces.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples

Referring to fig. 1-3, a vacuum contactor, including glass shell 1, the upper and lower both ends of glass shell 1 all run through and are equipped with conducting rod 2, the one end of conducting rod 2 that is located the glass shell 1 upside in glass shell 1 is equipped with stationary contact 3, the one end of conducting rod 2 that is located the glass shell downside in glass shell 1 is equipped with movable contact 4, two conducting rod 2 are respectively at the outer one end fixedly connected with first locating plate 7 of glass shell 1 and second locating plate 6, second locating plate 6 is connected with the current conducting plate through the flexible conductor electricity, all be connected with external copper bar on first locating plate 7 and the current conducting plate, first locating plate 7 and the common fixedly connected with insulation board 13 of current conducting plate, be connected with the control structure of control sound electric shock mutual contact separation on insulation board 13, the bottom of second locating plate 6 is connected with supplementary connecting device.

Auxiliary connection device includes transmission structure and location structure, transmission structure is including welding the spring 8 in the 6 bottoms of second locating plate, the one end welding that second locating plate 6 was kept away from to spring 8 has transmission piece 9, the bottom of transmission piece 9 is connected with lever 10, lever 10 has two mutually perpendicular's lever arm, a lever arm rotates with transmission piece 9 to be connected, another lever arm is parallel with insulation board 13, the junction of two lever arms of lever 10 rotates and is connected with the location axle, the location axle is connected fixedly with external fixed station, because lever 10 rotates through the location axle to be connected, make when a lever wall of lever 10 takes place relative electro-magnet 12 and is close to or keeps away from, can drive another lever arm and do the ascending removal of vertical side, thereby movable contact 4's removal has been realized.

The control structure comprises an electromagnet 12, the electromagnet 12 is welded on one side of an insulating plate 13 far away from the glass shell 1, one side of a lever arm parallel to the insulating plate 13, which is close to the electromagnet 12, is glued with a permanent magnet 11, two positioning rods 14 are respectively arranged on a first positioning plate 7 and a second positioning plate 6, one ends of the two positioning rods 14, which are close to each other, are respectively provided with an observation sheet 15, one sides of the two observation sheets 15, which are close to each other, are respectively provided with a magnet, the two observation sheets 15 are mutually attracted through the magnet, so that when the positioning rods 14 have small deviation, the second positioning plate 6 can be restored to an original point state through the attraction of the magnet, and when the positioning rods 14 have large deviation and cannot be restored, a worker can obtain a conclusion of fixed dislocation between two conducting rods 2 in the glass shell 1 by penetrating through the obvious positioning differences of the, the danger of power failure caused by poor contact for a long time is avoided.

The transmission block 9 is made of insulating materials, the conducting rod 2 provided with the static contact 3 is provided with the shielding cover 5, the shielding cover 5 has the effect that when current is cut off, metal steam which is diffused out in a gathering mode in a condensation contact gap is beneficial to arc extinguishing, and the metal steam can be prevented from splashing and falling on the insulating shell to reduce the insulating strength of the insulating shell. The corrugated pipe is sleeved outside the conducting rod 2 provided with the movable contact 4, the arranged corrugated pipe can prevent the movable contact 4 from air leakage during up-and-down movement, the magnet structure between the observation pieces 15 is set to be in an annular structure and is in a mutually-attached state, and the annular magnet structure has an automatic restoring function, so that when two observation pieces 15 are in small-amplitude dislocation, the two observation pieces can restore under the magnetic action of the magnet, the first positioning plate 7 is welded with the corresponding positioning rod 14, and the second positioning plate 6 is movably connected with the corresponding positioning rod 14.

In the utility model, when the switch of the electromagnet 12 is closed, because the permanent magnet 11 attracts the iron core in the electromagnet 12, the lever 10 rotates anticlockwise at the moment, the conducting rod 2 controls the movable contact 4 and the fixed contact 3 to separate from each other, and when the switch of the electromagnet 12 is opened, the side where the electromagnet 12 and the permanent magnet 11 are close to each other has the same magnetic pole, the lever 10 rotates clockwise under the condition that the same poles repel each other, the movable contact 4 moves upwards and contacts with the fixed contact 3, and in the process, because when the power is switched on, the impact of the electromagnet 12 and the permanent magnet 11 is flexible impact, and the permanent magnet 11 and the electromagnet 12 have permanent magnetism, the failure state can not occur, the device can work normally all the time, and the fixed contact 3 and the first positioning plate 7 are welded and fixed with the outside all the time, and is in a static state, while the movable contact 4 and the corresponding conducting rod 2 are in a movable state, and the fixing of the second positioning plate 6 is not stable enough, the conducting rod 2 is easy to be dislocated in the process of being pushed up and down, the mutual contact of the moving contact and the static contact is affected, when the conducting rod 2 is deviated, the second positioning plate 6 is pushed to move, and the second positioning plate 6 is movably connected with the positioning rod 14, the positioning rod 14 is simultaneously pushed so that the two observation pieces 15 are offset from each other, and when this offset is small, because the two magnets arranged on the observation sheet 15 have certain restoring capability, the second positioning plate 6 can be reversely pushed to return to the original position, when the deviation is large, the contact state of the movable contact 4 and the fixed contact 3 in the glass shell 1 can be distinguished from the macro, and workers can know the contact state in sequence, so that the problems can be conveniently solved when the faults occur.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. A vacuum contactor comprises a glass shell (1), and is characterized in that conductive rods (2) are arranged at the upper end and the lower end of the glass shell (1) in a penetrating manner, a stationary contact (3) is arranged at one end, in the glass shell (1), of each conductive rod (2) positioned on the upper side of the glass shell (1), a movable contact (4) is arranged at one end, in the glass shell (1), of each conductive rod (2) positioned on the lower side of the glass shell, a first positioning plate (7) and a second positioning plate (6) are fixedly connected to one ends, outside the glass shell (1), of the two conductive rods (2) respectively, the second positioning plate (6) is electrically connected with a conductive plate through a flexible wire, the first positioning plate (7) and the conductive plate are both connected with an external copper bar, the first positioning plate (7) and the conductive plate are fixedly connected with an insulating plate (13) together, and the insulating plate (13) is connected with a control structure for controlling the mutual contact and separation, the bottom of the second positioning plate (6) is connected with an auxiliary connecting device.

2. A vacuum contactor as claimed in claim 1, wherein the auxiliary connecting device comprises a transmission structure and a positioning structure, the transmission structure comprises a spring (8) welded at the bottom of the second positioning plate (6), a transmission block (9) is welded at one end of the spring (8) far from the second positioning plate (6), a lever (10) is connected to the bottom of the transmission block (9), the lever (10) has two lever arms perpendicular to each other, one of the lever arms is rotatably connected with the transmission block (9), the other lever arm is parallel to the insulating plate (13), a positioning shaft is rotatably connected to the joint of the two lever arms of the lever (10), and the positioning shaft is fixedly connected with an external fixed station.

3. A vacuum contactor as claimed in claim 2, characterized in that said control structure comprises an electromagnet (12), said electromagnet (12) being welded to the insulating plate (13) on the side remote from the glass envelope (1), and a permanent magnet (11) being glued to the side of said lever arm parallel to the insulating plate (13) close to the electromagnet (12).

4. A vacuum contactor as claimed in claim 2, wherein said positioning structure comprises two positioning rods (14), two positioning rods (14) are respectively disposed on the first positioning plate (7) and the second positioning plate (6), one end of each positioning rod (14) close to each other is provided with an observation piece (15), and one side of each observation piece (15) close to each other is provided with a magnet.

5. A vacuum contactor as claimed in claim 2, characterized in that the driving block (9) is made of insulating material, the conducting rod (2) provided with the stationary contact (3) is provided with a shielding cover (5), and the conducting rod (2) provided with the movable contact (4) is externally sleeved with a bellows.

6. A vacuum contactor as claimed in claim 4, characterized in that the magnet structure between the two said observation plates (15) is arranged as a ring structure and in a state of mutual attachment, the first positioning plate (7) is welded with the corresponding positioning rod (14), and the second positioning plate (6) is movably connected with the corresponding positioning rod (14).

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