Elevator emergency release control device

Abstract

The present invention discloses an elevator emergency release control device, comprising a first switch unit, used for controlling the disconnection or closing of a first circuit, wherein the first circuit is a circuit in which a three-phase power supply circuit of an elevator traction machine and an emergency release power supply circuit are arranged in parallel; an emergency release button is also arranged on the emergency release power supply circuit; the first switch unit is in a working state when the first circuit is closed; a second switch unit, used for controlling the disconnection or closing of a second circuit, wherein the second circuit is a control loop power supply circuit; the second switch unit is in a working state when the second circuit is closed; and a switching device, used for switching the working state between the first switch unit and the second switch unit, so that only one of the first circuit or the second circuit is in a working state.

Description

Technical Field

[0001] The invention relates to the field of elevator control, and in particular to an elevator emergency brake release control device. Background Art

[0002] When an elevator has an abnormal fault and stops in a non-level area, passengers will be trapped. At this time, if the fault is minor, emergency electric operation can be used to move the car to the level area and open the door to let people out. If the fault is serious, such as the drive part is burned out and the traction machine cannot be used to move the car, it is necessary to manually release the brake to allow the car to slide to the level area. The permanent magnet synchronous traction machine used in mainstream elevators must be short-circuited and sealed when releasing the brake to prevent the car from accelerating too fast due to unbalanced weight, resulting in a runaway car.

[0003] There are two ways to manually release the brake: mechanical force method and electrical force method.

[0004] The mechanical forced method uses a mechanical structure to force the brake to open. For example, the CN105000491A elevator brake release device provides a mechanical structure that is easy to operate. The biggest disadvantage of the mechanical forced method is that it cannot constrain the operator to short-circuit the three-phase traction machine to close the star, which is easy to cause the danger of running away.

[0005] The electrical forced method uses a power source such as a battery to directly send electrical energy to the brake. For example, CN104773627A, but according to this operation method, a contactor needs to be used to maintain the pull-in to short-circuit the three phases of the traction machine to close the star, which increases the overall system energy consumption. In addition, if the release switch and the contactor for closing the star need to be forced to be linked, an additional electrical control circuit is required, which increases the system cost. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an emergency brake release control device, which adopts a combination of optimized circuit control and mechanical structure to ensure that the emergency brake release operation cannot be performed when the elevator is in normal operation. At the same time, when the elevator is in emergency brake release operation, the three-phase power supply of the traction machine is in a star-off state.

[0007] In order to solve the above technical problems, the present invention discloses an elevator emergency release control device, comprising: a first switch unit, used to control the opening or closing of a first circuit, the first circuit is a circuit in which a three-phase power supply circuit of an elevator traction machine and an emergency release power supply circuit are arranged in parallel; an emergency release button is also provided on the emergency release power supply circuit; the first switch unit is in a working state when the first circuit is closed; a second switch unit, used to control the opening or closing of a second circuit, the second circuit is a control loop power supply circuit; the second switch unit is in a working state when the second circuit is closed;

[0008] The switching device is used to switch the working state between the first switch unit and the second switch unit, so that only one of the first circuit or the second circuit is in the working state.

[0009] Preferably, the switching device is a baffle, and the elevator emergency brake release control device also includes a fixing device for fixing the baffle.

[0010] Preferably, the fixing device is movably connected to the baffle.

[0011] Preferably, the fixing device is rotatably connected to the baffle, and the baffle is two plane plates perpendicular to each other.

[0012] Preferably, the fixing device is slidably connected to the baffle plate, and the baffle plate is a long flat plate and is embedded in a sliding groove of the fixing device and slides.

[0013] Preferably, an emergency release circuit breaker is also provided on the emergency release power supply circuit.

[0014] Preferably, the first switch unit is a plug-in device.

[0015] Preferably, the second switch unit is a plug-in device or a circuit breaker.

[0016] By using this device, the safety of on-site rescue can be guaranteed. In addition, the device requires very few materials and does not require a separate contactor for star sealing, which saves the energy consumption of the star sealing contactor and reduces the overall cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1-Figure 3 It is a physical schematic diagram and circuit schematic diagram of Example 1 of the emergency brake release control device of the present invention.

[0018] Figure 4 This is a circuit diagram of Example 2 of the emergency brake release control device of the present invention.

[0019] Figure 5-Figure 7 It is a physical schematic diagram and circuit schematic diagram of Example 3 of the emergency brake release control device of the present invention.

[0020] Figure 8 Schematic diagram of the circuit of the emergency brake release control device embodiment 4 of the present invention.

[0021] Figure 9-11 It is a physical schematic diagram and circuit schematic diagram of Example 5 of the emergency brake release control device of the present invention.

[0022] Figure 12-14 It is a physical schematic diagram and circuit schematic diagram of Example 7 of the emergency brake release control device of the present invention.

[0023] Fig.15This is a circuit diagram of Example 8 of the emergency brake release control device of the present invention.

[0024] Description of Reference Numerals

[0025] 1 First connector 10 First circuit

[0026] 101 Traction machine three-phase power supply connector 102 Emergency release power supply connector

[0027] 2 Second connector 20 Second circuit

[0028] 201 Control circuit power connector

[0029] 3 Baffle 4 Fixing device DETAILED DESCRIPTION

[0030] The emergency brake release device of the present invention comprises:

[0031] a first switch unit, used to control the opening or closing of a first circuit, wherein the first circuit is a circuit in which a three-phase power supply circuit of an elevator traction machine and an emergency release power supply circuit are arranged in parallel; an emergency release button is also provided on the emergency release power supply circuit; the first switch unit is in a working state when the first circuit is closed;

[0032] A second switch unit is used to control the opening or closing of a second circuit, where the second circuit is a control loop power supply circuit; the second switch unit is in a working state when the second circuit is closed;

[0033] The switching device is used to switch the working state between the first switch unit and the second switch unit, so that only one of the first circuit or the second circuit is in the working state.

[0034] Specifically, the switching device can be switched manually, or a specific structure can be set as the switching device. The following embodiments further illustrate the case where the switching device is a specific structure.

[0035] Example 1

[0036] like Figure 1-2 As shown, the emergency release device of Example 1 includes two connectors, a baffle, a fixing device, and an emergency release button.

[0037] like Figure 1-3 As shown, the first switch unit and the second switch unit in this embodiment are both connectors. The two connectors are arranged in parallel. The first connector 1 controls the first circuit 10, and the circuit where the traction machine three-phase power supply connector 101 and the emergency release power supply connector 102 are located; the second connector 2 controls the second circuit 20, that is, the circuit where the control loop power supply connector 201 is located.

[0038] The baffle 3 is fixed between the two connectors by the fixing device 4 and can rotate freely. When the baffle 3 is in the first position, the control circuit power connector 201 is exposed, and the traction machine three-phase power connector 101 and the emergency release power connector 102 are shielded. When the baffle is in the second position, the control circuit power connector 201 is shielded, and the traction machine three-phase power connector 101 and the emergency release power connector 102 are exposed.

[0039] When the control circuit power connector 201 is inserted, the elevator operates normally. The traction machine three-phase power connector 101 and the emergency release power connector 102 are shielded and cannot be inserted. This prevents the three-phase power supply from being short-circuited during the normal operation of the elevator and prevents the emergency release power from being connected.

[0040] After the control circuit power connector 201 is unplugged, the elevator stops running. At this time, the traction machine loses power. After the traction machine three-phase power supply connector 101 and the emergency release power supply connector 102 are inserted, the three phases of the traction machine are short-circuited and sealed, and the emergency release power supply is turned on. At this time, press the emergency release button, the power is sent to the brake, the brake opens, and the car slips due to the unbalanced load. Since the three phases of the traction machine have been short-circuited and sealed, the car speed is slow. After the car runs into the door area, release the emergency release button, the brake loses power, the car stops running, and the door is opened to let people in.

[0041] Example 2

[0042] like Figure 4 As shown, based on Example 1, Example 2 adds a circuit breaker to the emergency release power supply circuit. When the emergency release button fails and sticks, the emergency release power supply circuit can be forcibly disconnected, causing the brake to lose power and stop the car.

[0043] Example 3

[0044] like Figure 5-7 As shown, based on Example 1 and different from it, the second switch unit in Example 3 is a circuit breaker.

[0045] The baffle 3 is fixed between the control circuit power circuit breaker and the first connector 1 by a fixing device and can rotate freely. When the baffle 3 is in the first position, the control circuit power circuit breaker is exposed, and the three-phase power supply connector of the traction machine and the emergency release power supply connector are shielded. At this time, the control circuit power circuit breaker can be pushed up and closed, and the elevator operates normally. The three-phase power supply of the traction machine and the emergency release power supply connector are shielded and the connectors cannot be inserted. Prevent the three-phase power supply from being short-circuited during the normal operation of the elevator, and prevent the emergency release power supply from being connected.

[0046] When the baffle is in the second position, it blocks the control circuit power circuit breaker. At this time, the control circuit power circuit breaker must be in the disconnected state, and the elevator stops running. At this time, the traction machine loses power. After inserting the three-phase power supply of the traction machine and the emergency release power connector, the three phases of the traction machine are short-circuited and sealed, and the emergency release power is connected. At this time, press the emergency release button, the power is sent to the brake, the brake opens, and the car slips due to unbalanced load. Since the three phases of the traction machine have been short-circuited and sealed, the car speed is slow. After the car runs into the door area, release the emergency release button, the brake loses power, the car stops running, and the door opens to let people in.

[0047] Example 4

[0048] like Figure 8 As shown, based on Example 3, Example 4 adds a circuit breaker to the emergency release power supply circuit. When the emergency release button fails and sticks, the emergency release power supply circuit can be forcibly disconnected, causing the brake to lose power and stop the car.

[0049] Example 5

[0050] like Figure 9-11 As shown, the difference between Example 5 and Example 1 is that the baffle 3 is slidably connected to the fixing device 4, and the baffle is a long strip flat plate and is embedded in the slide groove of the fixing device for sliding. When the baffle 3 is in the first position, the control circuit power connector is exposed, and the three-phase power supply of the traction machine and the emergency release power connector are shielded. When the baffle 3 is in the second position, the control circuit power connector is shielded, and the three-phase power supply of the traction machine and the emergency release power connector are exposed.

[0051] Example 6

[0052] On the basis of Example 5, the difference between Example 6 and Example 5 is that a circuit breaker is added to the emergency release power supply circuit. When the emergency release button fails and sticks, the emergency release power supply circuit can be forcibly disconnected, causing the brake to lose power and stop the car.

[0053] Example 7

[0054] like Figure 12-14 As shown, based on Example 5, Example 7 differs from Example 5 in that the second switch unit in Example 7 is a circuit breaker.

[0055] Example 8

[0056] like Fig.15 As shown, based on Example 7, Example 8 adds a circuit breaker to the emergency release power supply circuit. When the emergency release button fails and sticks, the emergency release power supply circuit can be forcibly disconnected, causing the brake to lose power and stop the car.

[0057] The present invention adopts the combination of optimized circuit control and mechanical structure to ensure that the elevator cannot perform emergency brake release operation when it is in normal operation. At the same time, when the elevator is in emergency brake release operation, the three-phase power supply of the traction machine is in a star-off state.

[0058] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An elevator emergency brake release control device, characterized in that: include: a first switch unit, used to control the opening or closing of a first circuit, wherein the first circuit is a circuit in which a three-phase power supply circuit of an elevator traction machine and an emergency release power supply circuit are arranged in parallel; an emergency release button is also provided on the emergency release power supply circuit; the first switch unit is in a working state when the first circuit is closed; A second switch unit, used to control the opening or closing of a second circuit, wherein the second circuit is a control loop power supply circuit; The second switch unit is in a working state when the second circuit is closed; The switching device is used to switch the working state between the first switch unit and the second switch unit, so that only one of the first circuit or the second circuit is in the working state.

2. The elevator emergency brake release control device according to claim 1, characterized in that: The switching device is a baffle, and the elevator emergency brake release control device also includes a fixing device for fixing the baffle.

3. The elevator emergency brake release control device according to claim 2, characterized in that: The fixing device is movably connected to the baffle.

4. The elevator emergency brake release control device according to claim 3, characterized in that: The fixing device is rotatably connected to the baffle, and the baffle is two plane plates perpendicular to each other.

5. The elevator emergency brake release control device according to claim 3, characterized in that: The fixing device is slidably connected with the baffle plate, and the baffle plate is a long strip-shaped plane plate and is embedded in the sliding groove of the fixing device and slides.

6. The elevator emergency brake release control device according to claim 1, characterized in that: The emergency release power supply circuit is also provided with an emergency release circuit breaker.

7. The elevator emergency brake release control device according to claim 1, characterized in that: The first switch unit is a plug-in device.

8. The elevator emergency brake release control device according to any one of claims 1 to 7, characterized in that: The second switch unit is a plug-in device or a circuit breaker.

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