Elevator rescue power supply circuit based on integrated star sealing transformation

Abstract

The utility model relates to an elevator rescue power supply circuit based on integrated star-sealing transformation, the elevator rescue power supply circuit comprises a contactor, a commercial power supply circuit and a UPS power-off rescue circuit, the contactor comprises a contact support, an upper layer contact and a lower layer contact, the upper layer contact and the lower layer contact are jointly arranged on the contact support and interlocked with each other; the commercial power supply circuit is connected with the upper layer contact, and the UPS power-off rescue circuit is connected with the lower layer contact. And the upper layer contact and the lower layer contact share one loop. According to the contactor, when the elevator operates normally, the upper-layer contact is closed, and the lower-layer contact is disconnected. According to the contactor, when the elevator is powered off, the upper-layer contact is disconnected, and the lower-layer contact is closed. And the contactor is connected with a main loop and a control loop of the elevator. By improving the structure of the integrated star-sealing contactor and cooperatively improving the corresponding power supply circuit, the upper-layer contact and the lower-layer contact of the contactor are mutually interlocked, and the contactor can be applied to reliable switching between a mains supply circuit and a UPS power-off rescue circuit, so that the mains supply circuit is connected under the normal condition to enable an elevator to operate normally, and the service life of the elevator is prolonged. When the elevator is powered off, the UPS power-off rescue circuit is switched to supply power to the main loop and the control loop so as to complete power-off leveling rescue, the number of contactors and related connecting wires can be reduced, and therefore the layout space of a control cabinet is further optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator rescue, and in particular to an elevator rescue power supply circuit based on integrated star-sealing transformation. Background Art

[0002] The level-off and level-laying function of elevators is usually realized by two methods: active ARD automatic rescue device and passive UPS uninterruptible power supply. When the UPS supplies power to the system after the elevator loses power, the system needs to build a switching circuit through two contactors. Among them, the contactor KP is used to cut off the entry of the mains during rescue to ensure the separation from the mains during rescue; and the KUP contactor is used to switch between the mains and UPS power supply. Although this method can realize the level-off and level-laying function, it needs to occupy two independent contactor positions in the control cabinet, which takes up more space in the control cabinet layout. At the same time, due to the increase in the number of contactors, there are more related wiring, and there is a possibility of wiring errors during production and use.

[0003] Therefore, it is quite necessary to simplify the elevator power supply circuit, effectively control the space layout, and design a solution that meets the functional requirements. Utility Model Content

[0004] The purpose of the utility model is to provide an elevator rescue power supply circuit based on integrated star-sealing modification, which can be applied to the switching between the mains power supply circuit and the UPS power failure rescue circuit by improving the structure of the integrated star-sealing contactor and coordinating the improvement of the corresponding power supply circuit, thereby completing the power failure level rescue, which can save the number of contactors and associated wiring, thereby further optimizing the layout space of the control cabinet.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an elevator rescue power supply circuit based on integrated star-sealing transformation, comprising:

[0006] A contactor, comprising a contact support, an upper contact and a lower contact which are jointly arranged on the contact support and interlocked with each other;

[0007] A mains power supply circuit connected to the upper contact;

[0008] The UPS power failure rescue circuit is connected with the lower contact.

[0009] Optionally, the upper contacts and the lower contacts share a loop.

[0010] Optionally, the contactor is configured so that when the elevator operates normally, the upper contact is closed and the lower contact is opened.

[0011] Optionally, the contactor is configured so that when the elevator is powered off, the upper contact is opened and the lower contact is closed.

[0012] Optionally, the contactor is connected to the elevator main circuit and the control circuit.

[0013] The beneficial effect of the utility model is that by improving the structure of the integrated star-sealing contactor and coordinating the improvement of the corresponding power supply circuit, the upper contacts and the lower contacts of the contactor are interlocked with each other, and can be used for reliable switching between the AC power supply circuit and the UPS power failure rescue circuit, so that under normal circumstances, the AC power supply circuit is connected to enable the normal operation of the elevator, and when the elevator is powered off, it is switched to the UPS power failure rescue circuit to power the main circuit and the control circuit to complete the power failure level rescue, which can save the number of contactors and associated wiring, thereby further optimizing the layout space of the control cabinet.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an elevator rescue power supply circuit based on integrated star-sealing transformation shown in one embodiment of the utility model;

[0016] Figure 2 It is a schematic structural diagram of an integrated star-sealing contactor in the prior art;

[0017] Figure 3 This is a schematic diagram of selection parameters of an integrated star-sealed contactor in the prior art;

[0018] Figure 4 It is a schematic diagram of contacts of an integrated star-sealing contactor in the prior art;

[0019] In the figure: 1. contactor; 11. contact bracket; 12. upper contact; 13. lower contact; 2. AC power supply circuit; 3. UPS power failure rescue circuit. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] See also Figure 1 and Figure 2 , an elevator rescue power supply circuit based on integrated star-sealing transformation shown in a preferred embodiment of the present application includes a contactor 1, a mains power supply circuit 2 and a UPS power failure rescue circuit 3, the contactor 1 includes a contact bracket 11, an upper contact 12 and a lower contact 13 which are jointly arranged on the contact bracket 11 and interlocked with each other, the mains power supply circuit 2 is connected to the upper contact 12, and the UPS power failure rescue circuit 3 is connected to the lower contact 13. The upper contact 12 and the lower contact 13 share a circuit. The contactor 1 is configured so that when the elevator is operating normally, the upper contact 12 is closed and the lower contact 13 is disconnected. The contactor 1 is configured so that when the elevator is powered off, the upper contact 12 is disconnected and the lower contact 13 is closed. The contactor 1 is connected to the elevator main circuit and the control circuit.

[0024] According to the scheme of the embodiment of the utility model, since the UPS supplies power to the system after the elevator is powered off, the system needs to build a switching circuit through two contactors 1. Among them, the contactor 1KP is used to cut off the entry of the mains during rescue, ensuring the separation from the mains during rescue; and the KUP contactor 1 is used for switching between the mains and UPS power supply. Although this method can achieve the function of disconnecting the level layer, it needs to occupy two independent contactor 1 positions in the control cabinet, which takes up more control cabinet layout space. At the same time, due to the increase in the number of contactors 1, the associated wiring is also more, and there is a possibility of wiring errors during production and use. Therefore, the present application improves the structure of the integrated star-sealing contactor 1 and improves the corresponding power supply circuit. The upper contacts 12 and the lower contacts 13 of the contactor 1 are interlocked with each other, and can be used for reliable switching between the AC power supply circuit 2 and the UPS power failure rescue circuit 3. Under normal circumstances, the AC power supply circuit 2 is connected to enable the normal operation of the elevator. When the elevator is powered off, it is switched to the UPS power failure rescue circuit 3 to power the main circuit and the control circuit to complete the power failure rescue. This can save the number of contactors 1 and associated wiring, thereby further optimizing the layout space of the control cabinet.

[0025] The following is a detailed description with specific embodiments:

[0026] The integrated star-sealing contactor 1 is also used in elevators, mainly for synchronous traction machines. When the brake fails, the three-phase coils of the motor are short-circuited, that is, the coils of the three-phase power supply are connected together to generate braking force. At the same time, it also reverses the electromotive force of the motor (the power generated by the motor), so that the elevator car is braked, avoiding the occurrence of rapid slipping, thereby ensuring the safety of passengers and equipment.

[0027] See also Figure 2 It can be seen that the integrated star-sealing contactor 1 has two layers of contacts, the upper layer contact 12 and the lower layer contact 13. The upper layer contact 12 is the star-sealing contact, and the lower layer contact 13 is the operating contact. The operating contact and the star-sealing contact are installed on the same contact bracket 11. At the same time, the operating contact and the star-sealing contact share a circuit, and the star-sealing circuit is integrally built into the integrated star-sealing contactor 1 in the form of a copper terminal block. In the normal state, the contact bracket 11 is in the released state, the upper layer contact 12 is closed, and the lower layer contact 13 is disconnected, and the upper and lower layers are in an interlocking relationship; when the coil is attracted, the upper layer contact 12 is disconnected, and the lower layer contact 13 is closed.

[0028] See also Figure 3According to the measured data, when the elevator is shut down at high speed (i.e., when the elevator suddenly loses power, the elevator car is still in operation and the brake has not closed due to mechanical delay), the effective value of the shut-down circuit current is about 2-3 times the rated current of the host; when the elevator is shut down at low speed (i.e., when the brake fails, the elevator is shut down at zero speed in the leveling area), the shut-down circuit current is about 0.6 times the rated current of the host. Figure 3 and Figure 4 It can be seen that the contact capacity of the main contacts of the integrated star-sealed contactor 1 connected to the main circuit is sufficient, and its auxiliary contacts are also sufficient for signal feedback and output control.

[0029] Therefore, according to the star-sealing application and the characteristics of the body structure of the integrated star-sealing contactor 1, the short-circuit copper sheet of the three-phase upper contact 12 terminal of the original integrated star-sealing contactor 1 is removed, and only the interlocking state relationship between the upper contact 12 and the lower contact 13 is applied. Figure 1 ), use the upper contact 12 to connect to the mains power supply circuit 2, and the lower contact 13 to connect to the UPS power failure rescue circuit 3. When the elevator is powered off, when the system voltage drops to the specified threshold, the two output points YM6 and YO10 are closed through the output of the elevator main control unit. At this time, the contact bracket 11 of the contactor 1 is activated, the upper contact 12 is disconnected, and the lower contact 13 is closed. The UPS power failure rescue circuit 3 directly supplies power to the main circuit and the control circuit.

[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An elevator rescue power supply circuit based on integrated star-sealing transformation, characterized in that: include: A contactor, comprising a contact support, an upper contact and a lower contact which are jointly arranged on the contact support and interlocked with each other; A mains power supply circuit connected to the upper contact; The UPS power failure rescue circuit is connected with the lower contact.

2. The elevator rescue power supply circuit based on integrated star-sealing transformation according to claim 1 is characterized in that: The upper contact and the lower contact share a circuit.

3. The elevator rescue power supply circuit based on integrated star-sealing transformation according to claim 1 is characterized in that: The contactor is arranged so that when the elevator is running normally, the upper contact is closed and the lower contact is opened.

4. The elevator rescue power supply circuit based on integrated star-sealing transformation according to claim 1 is characterized in that: The contactor is arranged so that when the elevator is powered off, the upper contact is opened and the lower contact is closed.

5. The elevator rescue power supply circuit based on integrated star-sealing transformation according to claim 1 is characterized in that: The contactor is connected with the elevator main circuit and the control circuit.

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