Safety switch device for rail transit

Abstract

The utility model relates to the technical field of rail transit, in particular to a safety switch device for rail transit, which comprises a safety switch device cabinet body, a safety control circuit, a first circuit breaker control circuit and a second circuit breaker control circuit. The safety control circuit, the first circuit breaker control circuit and the second circuit breaker control circuit are arranged in the safety switch device cabinet body, and the safety switch device for rail transit is composed of the safety switch device cabinet body, the safety control circuit, the first circuit breaker control circuit and the second circuit breaker control circuit. The first circuit breaker control circuit and the second circuit breaker control circuit are respectively controlled by the safety control circuit, so that the first circuit breaker and the second circuit breaker execute corresponding actions, the rail transit traction power supply system is protected, and by adopting the structure, the whole structure of the safety switch device is simpler and more compact; the equipment mounting space can be saved, so that the mounting cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a safety switch device for rail transportation. Background Art

[0002] At present, the long-stator linear motor-driven rail transit traction power supply system mainly consists of safety switches, power devices (such as transformers, converters), and linear motors. In order to ensure that the vehicle meets a certain safety level during operation, the traction power supply system needs to be equipped with a safety switch, which usually consists of two circuit breakers connected in series to form a redundant configuration to ensure that it can be disconnected normally even if one of the circuit breakers fails. The safety switch usually adopts a vacuum circuit breaker or SF6 circuit breaker and is controlled by the operation control system. When the train speed exceeds the speed limit range and the control command sent by the operation control system to other systems is not executed or fails for some reason, the system directly disconnects the safety switch.

[0003] However, the existing safety switches in rail transit traction power supply systems have the disadvantages of each set of safety switches being composed of two sets of redundant switch cabinets, resulting in a large number of devices, large occupied space, and high equipment costs. Utility Model Content

[0004] The purpose of the utility model is to provide a safety switch device for rail transit, which solves the problem that the safety switches in the existing rail transit traction power supply system are composed of two sets of redundant switch cabinets, resulting in a large number of devices, large space occupation and high equipment cost.

[0005] To achieve the above-mentioned objectives, the present invention provides a safety switch device for rail transit, which includes a safety switch device cabinet, a safety control circuit, a first circuit breaker control circuit and a second circuit breaker control circuit. The safety control circuit, the first circuit breaker control circuit and the second circuit breaker control circuit are all arranged inside the safety switch device cabinet. The first circuit breaker control circuit is electrically connected to the safety control circuit, and the first circuit breaker control circuit is configured to control the execution action of the first circuit breaker. The second circuit breaker control circuit is electrically connected to the safety control circuit, and the second circuit breaker control circuit is configured to control the execution action of the second circuit breaker. The safety control circuit is configured to control the first circuit breaker control circuit and the second circuit breaker control circuit respectively in response to obtaining a safety control signal, so that the first circuit breaker and the second circuit breaker perform corresponding actions.

[0006] In which, the safety control circuit includes a safety controller, a closing control circuit and an opening control circuit, the closing control circuit and the opening control circuit are both electrically connected to the safety controller, the first circuit breaker control circuit includes a first closing coil HQ1 and a first opening coil TQ1, the second circuit breaker control circuit includes a second closing coil HQ2 and a second opening coil TQ2, the closing control circuit is respectively connected to the first closing coil HQ1 and the second closing coil HQ2, the opening control circuit is respectively connected to the first opening coil TQ1 and the second opening coil TQ2, the closing control circuit includes relay K1, relay K2, relay K3 and relay K4, the relay K1 and the relay K2 are normally open, the relay K3 and the relay K4 are normally closed, the opening control circuit includes relay K5, relay K6, relay K7 and relay K8, the relay K5 and the relay K6 are normally closed, and the relay K7 and the relay K8 are normally open.

[0007] In which, the safety control circuit also includes an enable control circuit, which is configured to control the first circuit breaker control circuit and the second circuit breaker control circuit in response to obtaining an enable signal. The enable control circuit includes relay K9 and relay K10. The first circuit breaker control circuit also includes a first enable coil UV1, and the second circuit breaker control circuit also includes a second enable coil UV2.

[0008] Wherein, the safety control circuit further includes an external control signal interface, and the external control signal interface is used to receive an external control signal.

[0009] The utility model provides a rail transit safety switch device, comprising a safety switch device cabinet, a safety control circuit, a first circuit breaker control circuit, and a second circuit breaker control circuit. The safety control circuit, the first circuit breaker control circuit, and the second circuit breaker control circuit are all arranged inside the safety switch device cabinet. Since the rail transit safety switch device is composed of the safety switch device cabinet, the safety control circuit, the first circuit breaker control circuit, and the second circuit breaker control circuit, the first circuit breaker control circuit and the second circuit breaker control circuit are respectively controlled by the safety control circuit to cause the first circuit breaker and the second circuit breaker to perform corresponding actions, thereby protecting the rail transit traction power supply system. The above structure makes the overall structure of the safety switch device simpler and more compact, saves equipment installation space, and thus reduces installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is a principle block diagram of a safety switch device for rail transit provided by the utility model.

[0012] Figure 2 This is a principle block diagram of the safety control circuit provided by the utility model.

[0013] Figure 3 It is a circuit structure diagram of the safety control circuit provided by the utility model.

[0014] 101-Safety switchgear cabinet, 102-Safety control circuit, 103-First circuit breaker control circuit, 104-Second circuit breaker control circuit, 105-First circuit breaker, 106-Second circuit breaker, 107-Safety controller, 108-Closing control circuit, 109-Opening control circuit, 110-Enable control circuit, 111-External control signal interface. DETAILED DESCRIPTION

[0015] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] See also Figures 1 to 3The present invention provides a safety switch device for rail transit, which includes a safety switch device cabinet 101, a safety control circuit 102, a first circuit breaker control circuit 103, and a second circuit breaker control circuit 104. The safety control circuit 102, the first circuit breaker control circuit 103, and the second circuit breaker control circuit 104 are all arranged inside the safety switch device cabinet 101. The first circuit breaker control circuit 103 is electrically connected to the safety control circuit 102. The first circuit breaker control circuit 103 is configured to control the execution action of a first circuit breaker 105. The second circuit breaker control circuit 104 is electrically connected to the safety control circuit 102. The second circuit breaker control circuit 104 is configured to control the execution action of a second circuit breaker 106. The safety control circuit 102 is configured to control the first circuit breaker control circuit 103 and the second circuit breaker control circuit 104 respectively in response to obtaining a safety control signal, so that the first circuit breaker 105 and the second circuit breaker 106 perform corresponding actions.

[0017] In this embodiment, since the rail transit safety switch device is composed of the safety switch device cabinet 101, the safety control circuit 102, the first circuit breaker control circuit 103 and the second circuit breaker control circuit 104, the first circuit breaker control circuit 103 and the second circuit breaker control circuit 104 are controlled by the safety control circuit 102 respectively, so that the first circuit breaker 105 and the second circuit breaker 106 perform corresponding actions, thereby realizing protection of the rail transit traction power supply system. The above structure makes the overall structure of the safety switch device simpler and more compact, which can save equipment installation space and thus reduce installation costs.

[0018] Furthermore, the safety control circuit 102 includes a safety controller 107, a closing control circuit 108 and an opening control circuit 109, the closing control circuit 108 and the opening control circuit 109 are both electrically connected to the safety controller 107, the first circuit breaker control circuit 103 includes a first closing coil HQ1 and a first opening coil TQ1, the second circuit breaker control circuit 104 includes a second closing coil HQ2 and a second opening coil TQ2, the closing control circuit 108 is respectively connected to the first closing coil HQ1 and the second closing coil The opening control circuit 109 is connected to the first opening coil TQ1 and the second opening coil TQ2 respectively, the closing control circuit 108 includes a relay K1, a relay K2, a relay K3 and a relay K4, the relay K1 and the relay K2 are normally open, the relay K3 and the relay K4 are normally closed, the opening control circuit 109 includes a relay K5, a relay K6, a relay K7 and a relay K8, the relay K5 and the relay K6 are normally closed, and the relay K7 and the relay K8 are normally open.

[0019] In this embodiment, the safety control signal includes a closing signal and an opening signal. The safety controller 107 is configured to respond to obtaining a closing signal and an opening signal. When the safety controller 107 obtains a closing signal, the safety controller 107 outputs a closing signal to the closing control circuit 108, the relay K1 and the relay K2 in the closing control circuit 108 are energized, the first closing coil HQ1 and the second closing coil HQ2 are energized respectively, and the first circuit breaker 105 and the second circuit breaker 106 respectively perform a closing action. When the safety controller 107 obtains an opening signal, the safety controller 107 outputs an opening signal to the opening control circuit 109, the relay K7 and the relay K8 in the opening control circuit 109 are energized, the first opening coil TQ1 and the second opening coil TQ2 are energized respectively, and the first circuit breaker 105 and the second circuit breaker 106 respectively perform an opening action.

[0020] Furthermore, the safety control circuit 102 also includes an enable control circuit 110, which is configured to control the first circuit breaker control circuit 103 and the second circuit breaker control circuit 104 in response to obtaining an enable signal. The enable control circuit 110 includes a relay K9 and a relay K10. The first circuit breaker control circuit 103 also includes a first enable coil UV1, and the second circuit breaker control circuit 104 also includes a second enable coil UV2.

[0021] In this embodiment, the safety control signal also includes an enable signal. When the safety controller 107 and the safety power supply are normal and fault-free, the relay K9 and the relay K10 are respectively energized to generate an enable signal. When the circuit breaker control power supply (KM) is de-energized, the first enabling coil UV1 and the second enabling coil UV2 are respectively de-energized, and the first circuit breaker 105 and the second circuit breaker 106 are respectively protected by tripping. When the control power supply of the safety controller 107 is de-energized or faulty, the relay K9 and the relay K10 are respectively de-energized, the first enabling coil UV1 and the second enabling coil UV2 are respectively de-energized, and the first circuit breaker 105 and the second circuit breaker 106 are respectively protected by tripping.

[0022] Furthermore, the safety control circuit 102 further includes an external control signal interface 111 , and the external control signal interface 111 is used to receive an external control signal.

[0023] In this embodiment, the external control signal includes an external control signal A and an external control signal B, which are redundant signals to each other. The control signal can be an electrical signal or an optical signal. When the external control signal A and the control signal B are input as a closing instruction at the same time, the safety controller 107 judges it as a valid closing instruction and outputs a closing signal, otherwise it outputs an opening signal. When responding to obtaining the closing signal, the first closing coil HQ1 is energized, the first circuit breaker 105 performs a closing action, and at the same time, the second closing coil HQ2 is energized, and the second circuit breaker 106 performs a closing action. When responding to obtaining the opening signal, the first opening coil TQ1 is energized, the first circuit breaker 105 performs an opening action, and at the same time, the second opening coil TQ2 is energized, and the second circuit breaker 106 performs an opening action.

[0024] Furthermore, the first circuit breaker 105 and the second circuit breaker 106 in this embodiment are both vacuum circuit breakers. The key components in the safety switch device cabinet 101 are the vacuum circuit breakers, as well as the control circuit and controller in the cabinet. The vacuum circuit breaker can not only switch on and off normal load current, but also switch on and off a certain short-circuit current.

[0025] In this embodiment, the types of the first circuit breaker 105 and the second circuit breaker 106 are not specifically limited, and they can also be SF6 circuit breakers or other switching devices, and can be selected and adjusted accordingly according to actual needs. The safety control circuit 102 is configured to obtain the safety control signal from the operation control system and / or traction control device, but the control object of the safety control circuit 102 is not specifically limited, and it can also be other control devices, and can be selected and adjusted accordingly according to actual needs.

[0026] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. A safety switch device for rail transit, characterized in that: The safety switch device includes a cabinet, a safety control circuit, a first circuit breaker control circuit, and a second circuit breaker control circuit. The safety control circuit, the first circuit breaker control circuit, and the second circuit breaker control circuit are all arranged inside the safety switch device cabinet. The first circuit breaker control circuit is electrically connected to the safety control circuit and is configured to control the execution action of the first circuit breaker. The second circuit breaker control circuit is electrically connected to the safety control circuit and is configured to control the execution action of the second circuit breaker. The safety control circuit is configured to control the first circuit breaker control circuit and the second circuit breaker control circuit respectively in response to obtaining a safety control signal, so that the first circuit breaker and the second circuit breaker perform corresponding actions.

2. The rail transit safety switch device according to claim 1, characterized in that: The safety control circuit includes a safety controller, a closing control circuit and an opening control circuit. The closing control circuit and the opening control circuit are both electrically connected to the safety controller. The first circuit breaker control circuit includes a first closing coil HQ1 and a first opening coil TQ1. The second circuit breaker control circuit includes a second closing coil HQ2 and a second opening coil TQ2. The closing control circuit is respectively connected to the first closing coil HQ1 and the second closing coil HQ2. The opening control circuit is respectively connected to the first opening coil TQ1 and the second opening coil TQ2. The closing control circuit includes a relay K1, a relay K2, a relay K3 and a relay K4. The relay K1 and the relay K2 are normally open, and the relay K3 and the relay K4 are normally closed. The opening control circuit includes a relay K5, a relay K6, a relay K7 and a relay K8. The relay K5 and the relay K6 are normally closed, and the relay K7 and the relay K8 are normally open.

3. The rail transit safety switch device according to claim 2, characterized in that: The safety control circuit also includes an enable control circuit, which is configured to control the first circuit breaker control circuit and the second circuit breaker control circuit in response to obtaining an enable signal. The enable control circuit includes relay K9 and relay K10. The first circuit breaker control circuit also includes a first enable coil UV1, and the second circuit breaker control circuit also includes a second enable coil UV2.

4. The rail transit safety switch device according to claim 3, characterized in that: The safety control circuit further includes an external control signal interface, and the external control signal interface is used to receive an external control signal.

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