CN222653876U - A pressure loss release - Google Patents

Abstract

The utility model discloses a pressure loss release, which relates to the field of protection devices for circuit breakers and solves the problem of being unable to operate manually. A first button and a second button are provided on the relay, the first button and the second button are synchronously linked and are in a low position when the relay is powered on and in a high position when the relay is powered off; a control mechanism is provided in the housing, the control mechanism includes a button member and a seesaw member, the button member extends from outside the housing to inside the housing and presses and contacts the first button, the seesaw member is swingably installed in the housing, one end of the seesaw member presses on the second button, and the other end cooperates with the lock to press against the lock when the second button is in a high position and to break away from the contact with the lock when the second button is in a low position. The operator can realize the dual control mode of the pressure loss release without relying on the automatic detection voltage condition, meet the need for human intervention under specific conditions, and improve the controllability and adaptability of the release.

Description

Voltage-loss release

Technical Field

The utility model relates to the field of protection devices of circuit breakers, in particular to a voltage-loss release.

Background

The voltage-losing release is a protection device used in an automatic circuit breaker, and has the main functions of automatically opening a circuit when the power supply voltage is reduced below a preset threshold value, preventing damage to electrical equipment under the condition of low voltage or no voltage, and simultaneously avoiding unexpected automatic reclosing when the power supply is restored. For example, the chinese utility model patent CN206293392U and a DZ47 voltage-loss release, the electromagnetic mechanism adopts a magnetic latching relay, and meanwhile, the overvoltage value, the undervoltage value, the pressing value and the recovery value of the device can be adjusted by replacing the capacitor on the circuit board, which is a small and adjustable technical scheme. However, in a complex electrical system, it may be necessary to manually intervene in the on-off of the circuit under specific conditions, instead of relying on automatic tripping, and the existing voltage-loss tripper cannot meet the requirement, and has poor controllability.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides a voltage-loss release, and solves the problem that manual operation cannot be performed.

The relay is arranged in the shell, the operating mechanism comprises a handle and a lock catch, the handle is connected with the lock catch in a linkage mode, a first button and a second button are arranged on the relay and are in synchronous linkage, the first button and the second button are in a low position when the relay is electrified and are in a high position when the relay is in a power failure state, a control mechanism is arranged in the shell and comprises a button piece and a rocker piece, the button piece extends into the shell from the outside and is in press contact with the first button, the rocker piece is arranged in the shell in a swinging mode, one end of the rocker piece is pressed on the second button, and the other end of the rocker piece is matched with the lock catch to be propped against the lock catch when the second button is in the high position and is out of contact with the lock catch when the second button is in the low position.

In one possible design, one end of the plate-tilting element has a pressing surface and the other end has an inclined pressing surface, the pressing surface is in pressing contact with the second button, and the inclined pressing surface is in abutting contact with the lock catch.

In one possible design, the tilting torsion spring is sleeved outside the tilting plate, and two ends of the tilting torsion spring are respectively propped against the tilting plate and the shell.

In one possible design, the surface of the shell is provided with a button hole, the button piece is provided with a button key and a step, the button key is movably arranged in the button hole and exposes out of the surface of the shell, the periphery of the button piece is provided with a reset spring, one end of the reset spring is propped against the step of the button piece, and the other end of the reset spring is propped against the inside of the shell.

In one possible design, the shell is fixedly provided with a limiting plate, a limiting groove is formed in the limiting plate, the bottom end of the button piece is further provided with a limiting table and a limiting column, the limiting table and the step are located at two ends of the limiting column, and the limiting column penetrates through the limiting groove and the limiting table and the step are respectively matched with the limiting plate in a propping mode.

According to the technical scheme, when the relay is not electrified, the first button and the second button are positioned at high positions, the rocker piece props against the lock catch, so that the release cannot be closed, after the relay is electrified, the rocker piece is separated from the lock catch and can be closed, so that safe operation is ensured, the automatic control of the release can be realized only after the voltage is recovered to be normal, the relay obtains electric power, the relay can be manually controlled in a manual pressing mode, an operator can manually perform closing or opening operation of the release according to actual requirements under the condition of not depending on automatic detection of the voltage, the dual control mode of the release under the condition of manual intervention is realized by combining the original automatic control and the newly added manual control function of the electromagnetic relay, and the controllability and the adaptability of the release are improved.

Drawings

FIG. 1 is a schematic view of a first button and a second button in a high position according to the present utility model;

FIG. 2 is a schematic diagram showing the structure of the first button and the second button in the low position state according to the present utility model;

FIG. 3 is an exploded view of an embodiment of the present utility model;

Wherein, 1, the shell, 2, the relay, 3, the operating mechanism, 21, the binding post, 22, the first button, 23, the second button, 31, the handle, 32, the lock catch, 4, the control mechanism, 41, the button piece, 42, the rocker piece, 421, the pressing surface, 422, the inclined pressing surface, 423, the tilting torsion spring, 11, the button hole, 12, the limiting plate, 121, the limiting groove, 411, the button key, 412, the step, 413, the return spring, 414, the limiting table, 415 and the limiting post.

Detailed Description

The voltage-losing release shown in fig. 1-3 comprises a shell 1, a relay 2 and an operating mechanism 3, wherein the relay 2 is arranged in the shell 1, the relay 2 can be a magnetic latching relay 2, and a relay 2 shell is arranged outside the relay 2 to wrap the relay 2, so that the use is prevented from being influenced by ash entering of the relay 2. The relay 2 is externally connected with a circuit wire through the binding post 21 and automatically adjusted according to the power supply voltage state, so that when the power supply voltage falls below a preset safety threshold, the system can respond timely, the circuit is cut off, and the damage of electrical equipment due to operation under the condition of low voltage or no voltage is effectively prevented. The first button 22 provided on the relay 2 cooperates with the second button 23, which remain low when the relay 2 is energized and conversely drop high, as a basis for the control logic. The operating mechanism 3 comprises a handle 31 and a lock catch 32, the handle 31 and the lock catch 32 are connected in a linkage manner, the lock catch 32 can rotate around a shaft by a certain angle under the drive of the handle 31, and the detailed description of how the handle 31 and the lock catch 32 are connected in a linkage manner is omitted. The control mechanism 4 is arranged in the shell 1, the control mechanism 4 comprises a button piece 41 and a rocker piece 42, the button piece 41 extends into the shell 1 from outside the shell 1 and is in press contact with the first button 22, the rocker piece 42 is installed in the shell 1 in a swinging mode, one end of the rocker piece 42 is pressed on the second button 23, and the other end of the rocker piece 42 is matched with the lock catch 32 to be propped against the lock catch 32 when the second button 23 is in a high position and is separated from contact with the lock catch 32 when the second button 23 is in a low position. The button member 41 is used as an external operation interface, which is convenient for a user to directly act on the first button 22, and the plate-tilting member 42 is respectively matched with the second button 23 and the lock catch 32 to realize the mechanical interaction of whether the lock catch 32 is fixed. The whole working principle is that when the release loses power or the power supply voltage falls below a preset safety threshold, the first button 22 and the second button 23 of the relay 2 are in an upward-moving high-position state, the button piece 41 protrudes from the shell 1, the plate-tilting piece 42 swings clockwise to contact the lock catch 32 until the lock catch 32 is propped against, the lock catch 32 is fixed and cannot rotate, and therefore the handle 31 cannot be normally closed. When the relay 2 is powered on, the first button 22 and the second button 23 are in a downward-moving low-position state, the button piece 41 moves downward, the plate-tilting piece 42 tilts anticlockwise and is separated from the lock catch 32, the lock catch 32 can rotate freely, and the handle 31 can be normally closed.

The plate-tilting member 42 has a pressing surface 421 at one end and an inclined pressing surface 422 at the other end, the pressing surface 421 being in press-contact engagement with the second button 23, and the inclined pressing surface 422 being in press-contact engagement with the lock catch 32. The tilting torsion spring 423 is sleeved outside the tilting plate member 42, and two ends of the tilting torsion spring 423 are respectively propped against the tilting plate member 42 and the shell 1. When the relay 2 is powered on, the torsion of the tilting torsion spring 423 makes the pressing surface 421 pressed on the second button 23, so that the tilting plate 42 keeps in contact with the second button 23, and is tightly linked with the state of the relay 2. The inclined pressure surface 422 can effectively support the lock catch 32 through the physical shape of the inclined surface when the second button 23 is in a high position (the relay 2 is in a power-off state), so that the handle 31 is prevented from being accidentally operated to be switched on, and further, additional safety protection is provided when the power supply voltage is abnormal. The lever plate 42 indirectly controls the state response of the relay 2 through the pressing action of one end, and the other end determines whether the manual operation handle 31 can actually influence the on-off of the circuit through the dynamic pushing or releasing of the inclined pressing surface 422 to the lock catch 32. The design ensures the accurate response of the system in an automatic control mode and provides a direct and effective manual control way when manual intervention is needed.

The surface of the shell 1 is provided with a button hole 11, the button piece 41 is provided with a button key 411 and a step 412, the button key 411 is movably arranged in the button hole 11 and exposes the surface of the shell 1, the button key 411 is a part which can be directly contacted and pressed by an operator, and the button piece 11 extends out of the surface of the shell 1, so that the manual control is convenient to intuitively carry out. A return spring 413 is mounted on the periphery of the button member 41, one end of the return spring 413 is pressed against the step 412 of the button member 41, and the other end is pressed against the inside of the housing 1. The step 412 serves to fix and guide the position of the return spring 413 and is also a carrier for the force of the return spring 413. When the operator releases the button key 411, the return spring 413 can immediately act to push the button key 411 back to the initial protruding position, and immediately feeds back the state of the relay 2, so that control confusion possibly caused by lack of automatic rebound of the button is avoided.

The limiting plate 12 is integrally arranged in the shell 1, the limiting plate 12 is provided with the limiting groove 121 from the side edge, the bottom end of the button piece 41 is further provided with the limiting stand 414 and the limiting column 415, the limiting stand 414 and the step 412 are located at two ends of the limiting column 415, the limiting column 415 penetrates through the limiting groove 121, the limiting stand 414 and the step 412 are respectively matched with the limiting plate 12 in a propped mode, and therefore the limiting column 415 is limited in a preset moving range. The limiting post 415 slides through the limiting groove 121, allows the button piece 41 to move up and down to realize pressing operation, and enables the button piece 41 to have a definite stopping point in the pressing and resetting process through the limiting of the limiting stand 414 and the step 412, so that the relay 2 is prevented from being damaged by excessive pressing, and meanwhile, the button piece 41 is ensured to be kept at a preset protruding position when not stressed.

Claims (5)

1. A pressure-loss release, comprising a shell, a relay and an operating mechanism, the relay being installed in the shell, the operating mechanism comprising a handle and a lock, the handle and the lock being linked and connected, characterized in that: the relay is provided with a first button and a second button, the first button and the second button are synchronously linked and are in a low position when the relay is energized and in a high position when the relay is de-energized; a control mechanism is arranged in the shell, the control mechanism comprising a button member and a seesaw member, the button member extends from outside the shell to inside the shell and presses and contacts the first button, the seesaw member is swingably installed in the shell, one end of the seesaw member presses on the second button, and the other end cooperates with the lock to press against the lock when the second button is in a high position and to break away from contact with the lock when the second button is in a low position. 2. The under-pressure release according to claim 1 is characterized in that: one end of the rocker element has a pressing surface, and the other end has an inclined pressing surface, the pressing surface is in pressing contact with the second button, and the inclined pressing surface is in abutting contact with the lock buckle top. 3. The under-pressure release according to claim 2, characterized in that: a tilting torsion spring is disposed on the seesaw member, and two ends of the tilting torsion spring are pressed against the seesaw member and the housing respectively. 4. The pressure-loss release according to claim 1 or 2 is characterized in that: a button hole is opened on the surface of the shell, and the button member has a button key and a step, and the button key is movably placed in the button hole and exposed to the surface of the shell; a return spring is installed on the periphery of the button member, one end of the return spring presses on the step of the button member, and the other end presses inside the shell. 5. The under-pressure releaser according to claim 4 is characterized in that: a limit plate is fixedly arranged in the shell, a limit slot is provided in the limit plate, the bottom end of the button member also has a limit platform and a limit column, the limit platform and the step are located at both ends of the limit column, the limit column passes through the limit slot and the limit platform and the step are respectively abutted against the limit plate.