An integrated subway catenary switching device

Abstract

The present invention discloses an integrated subway catenary switching device, comprising: at least two line-up disconnecting switches and at least one section disconnecting switch, wherein each adjacent two line-up disconnecting switches are connected via a section disconnecting switch; the line-up disconnecting switch includes a first chassis, a first moving contact, a first static contact, a grounding contact, an incoming line busbar and a first driving mechanism, and the section disconnecting switch includes a second chassis, a second moving contact, a second static contact and a second driving mechanism. By integrating two line-up disconnecting switches and a section disconnecting switch into one body to provide an integrated device, commissioning and assembly are completed at the factory, reducing the workload and working difficulty of on-site staff. The two-position line-up disconnecting switch is replaced by a three-position line-up disconnecting switch, avoiding complex electrical interlock relationships, simplifying the grounding process of the power circuit and enhancing the safety of the power circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of DC power supply for catenaries, and particularly to an integrated subway catenary switching device. Background Art

[0002] The disconnecting switch is a kind of electrical appliance widely used in high-voltage switchgear. It plays an isolating role in the circuit. Its working principle and structure are relatively simple. However, due to its large usage amount and high requirement for working reliability, it has a great impact on the design, construction, and safe operation of substations and power plants.

[0003] Publication No. CN205542553U discloses a disconnecting switch. This type of catenary switching switch is an on-net disconnecting switch with two working positions, namely the closing position and the opening position. When the moving contact abuts against the terminal, it is in the closing position, and when the moving contact and the terminal are separated, it is in the opening position. In addition, this type of two-position on-net disconnecting switch also has a complex electrical interlock relationship with the earthing disconnecting switch, and the earthing process is relatively cumbersome, which increases a large number of devices and cables and greatly increases the project cost.

[0004] Such as Figure 1 The existing subway catenary DC power supply equipment shown in the figure includes an on-net bypass combination switch and a catenary earthing switch. Among them, the on-net bypass combination switch is composed of two two-position on-net disconnecting switches 100(a) and 100(b) and a bypass disconnecting switch 200(a), and the catenary earthing switch is composed of two two-position on-net disconnecting switches 100(c) and 100(d); there is a complex electrical interlock relationship between the on-net disconnecting switch and the earthing disconnecting switch, the earthing process is relatively cumbersome, and it is easy to operate incorrectly; the on-net disconnecting switch and the bypass disconnecting switch are assembled on-site after being assembled in separate cabinets, which requires high on-site installation requirements. Summary of the Invention

[0005] In view of this, it is necessary to provide an integrated subway catenary switching device to solve the technical problems involved in the above background art.

[0006] According to one aspect of the present invention, there is provided an integrated subway catenary switching device, including: at least two on-net disconnecting switches and at least one bypass disconnecting switch, and each adjacent two of the on-net disconnecting switches are connected through one of the bypass disconnecting switches;

[0007] The online disconnector comprises a first chassis, a first moving contact, a first stationary contact, a grounding contact, an incoming line bar and a first transmission mechanism, wherein the incoming line bar and the first stationary contact are respectively installed at opposite ends of the first chassis with spacing and insulation, the first moving contact is rotatably installed at one end of the incoming line bar, the first transmission mechanism is installed on the first chassis and connected to the first moving contact to drive the first moving contact to rotate, the grounding contact is spaced apart from the first stationary contact, and the first stationary contact and the grounding contact are both located on the rotation track of the first moving contact;

[0008] The inter-zone isolating switch comprises a second base frame, a second moving contact, a second static contact and a second transmission mechanism. The ends of two adjacent incoming line rows facing away from the first moving contact are respectively insulated and installed at opposite ends of the second base frame. The second moving contact is rotatably installed on one of the incoming line rows, and the second static contact is shared with the other incoming line row. The second transmission mechanism is installed on the first base frame and connected to the second moving contact, so as to drive the second moving contact to rotate until it abuts against the second static contact.

[0009] According to some embodiments, the first base frame and the second base frame each include two channel steels, two bottom plates and two insulating columns, the two channel steels are parallelly spaced and oppositely arranged, the two bottom plates are respectively arranged at the opposite ends of the extension direction of the two channel steels, the two insulating columns are respectively installed on the two bottom plates, and the first static contact and the opposite ends of the incoming line row are both installed on the insulating columns.

[0010] According to some embodiments, every two adjacent insulating columns are arranged in parallel and perpendicular to the first base frame.

[0011] According to some embodiments, an active area is formed between the two bottom plates of the first bottom frame and the second bottom frame;

[0012] The first transmission mechanism and the second transmission mechanism both include an insulating pull rod and a connecting rod, one end of the insulating pull rod on the first transmission mechanism is connected to the first moving contact, and the other end is hinged to one end of the connecting rod, the middle part of the connecting rod is rotatably installed in the active area, and the other end of the connecting rod rotates to drive the insulating pull rod to rotate the first moving contact;

[0013] One end of the insulating pull rod on the second transmission mechanism is connected to the second moving contact, and the other end is hinged to one end of the connecting rod. The middle part of the connecting rod is rotatably installed in the active area, and the other end of the connecting rod rotates to drive the insulating pull rod to rotate the second moving contact.

[0014] According to some embodiments, the grounding contact is located above the incoming line row and on a moving track of the first moving contact.

[0015] According to some embodiments, the first moving contact and the second moving contact are both provided with moving arc-striking rods, and the first stationary contact, the second stationary contact and the grounding contact are both provided with stationary arc-striking rods;

[0016] The first moving contact respectively contacts the first stationary contact and the grounding contact via the moving arc-striking rod and the stationary arc-striking rod to strike an arc; the second moving contact contacts the second stationary contact via the moving arc-striking rod and the stationary arc-striking rod to strike an arc.

[0017] According to some embodiments, the first transmission mechanism and the second transmission mechanism also include a rotating shaft and a crank arm, the rotating shaft is located in the active area and its two ends are respectively rotatably connected to the two channel steels, the connecting rod includes a first connecting rod and two second connecting rods, one end of the first connecting rod is hinged to the crank arm, and the other end is fixedly connected to one side of the peripheral wall of the rotating shaft, the two second connecting rods are arranged in parallel, and one end of the two second connecting rods is respectively fixedly connected to the other side of the peripheral wall of the rotating shaft, and the other end is respectively hinged to one end of the insulating pull rod.

[0018] According to some embodiments, a plurality of restraining hoops are provided at one end of the crank arm away from the first connecting rod.

[0019] According to some embodiments, the incoming line row, the first moving contact, the second moving contact, the first static contact and the grounding contact are provided with double rows of connection holes on opposite sides;

[0020] One end of the two insulating pull rods respectively connected to the first moving contact and the second moving contact is arc-shaped.

[0021] According to some embodiments, a monitoring device is further included, which is arranged on one side of the online isolating switch and each of the inter-regional isolating switches to monitor the real-time status of each of the online isolating switch and each of the inter-regional isolating switches.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The first drive mechanism of the online disconnector drives the first moving contact to rotate for opening and closing operations at three positions. Respectively, the first moving contact abuts against the first static contact to form the working position, the first moving contact abuts against the grounding contact to form the grounding position, and the first moving contact is located between the first static contact and the grounding contact to be in the isolation position. In addition, the second drive mechanism of the crossover disconnector drives the opening and closing operation between the second moving contact and the second static contact, so that the current is conducted between two adjacent online disconnectors. Thus, by replacing the two-position online disconnector with a three-position online disconnector, complex electrical interlock relationships are avoided, the grounding process of the power circuit is simplified, and the safety of the power circuit is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0025] Figure 1 It is a circuit connection schematic diagram of a two-position disconnector device in the prior art;

[0026] Figure 2 It is a circuit connection schematic diagram of an integrated subway catenary switching device provided by the present invention;

[0027] Figure 3 It is a structural schematic diagram of an integrated subway catenary switching device provided by the present invention;

[0028] Figure 4 It is a partial structural schematic diagram of an integrated subway catenary switching device provided by the present invention.

[0029] In the figure: online disconnector 100, first chassis 110, channel steel 111, bottom plate 112, insulating column 113, first moving contact 120, moving arcing rod 121, first static contact 130, static arcing rod 131, grounding contact 140, incoming line busbar 150, first drive mechanism 160, insulating pull rod 161, connecting rod 162, rotating shaft 163, crank arm 164, crossover disconnector 200, second chassis 210, second moving contact 220, second static contact 230, second drive mechanism 240. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the present invention in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Please refer to Figures 2 - 4 As shown, the present invention provides an integrated subway catenary switching device, which integrates two incoming line disconnectors 100 and an overlap disconnector 200 into one body to provide an integrated device, which is debugged and assembled at the factory, reducing the workload and working difficulty of on-site staff. The three-position incoming line disconnector 100 is used to replace the two-position incoming line disconnector, avoiding complex electrical interlock relationships, simplifying the grounding process of the power circuit and improving the safety of the power circuit. The specific solution is as follows.

[0032] At least two incoming line disconnectors 100 and at least one overlap disconnector 200, and each adjacent two incoming line disconnectors 100 are connected by an overlap disconnector 200. Among them, the incoming line disconnector 100 includes a first chassis 110, a first moving contact 120, a first static contact 130, a grounding contact 140, an incoming line busbar 150 and a first driving mechanism 160. The incoming line busbar 150 and the first static contact 130 are respectively installed at opposite ends of the first chassis 110 at intervals and through insulating parts. The first moving contact 120 is rotatably installed at one end of the incoming line busbar 150. The first driving mechanism 160 is installed on the first chassis 110 and connected to the first moving contact 120 for driving the first moving contact 120 to rotate. The grounding contact 140 is arranged at intervals with the first static contact 130, and both the first static contact 130 and the grounding contact 140 are located on the rotation trajectory of the first moving contact 120. Thus, the first moving contact 120 has three positions, that is, it can respectively abut against the first static contact 130 to complete closing to conduct the circuit, or be located between the first static contact 130 and the grounding contact 140 to form an open state, or abut against the grounding contact 140 to form a grounded position.

[0033] The overlap disconnector 200 includes a second chassis 210, a second moving contact 220, a second static contact 230 and a second driving mechanism 240. The opposite ends of the adjacent two incoming line busbars 150 away from the first moving contact 120 are respectively installed at opposite ends of the second chassis 210 through insulating parts. The second moving contact 220 is rotatably installed on one of the incoming line busbars 150. The second static contact 230 is conductively connected to or is an integral structure with the other incoming line busbar 150. The second driving mechanism 240 is installed on the first chassis 110 and connected to the second moving contact 220 for driving the second moving contact 220 to rotate until it abuts against the second static contact 230. When the second moving contact 220 rotates until it abuts against the second static contact 230, the current is conducted between the adjacent two incoming line disconnectors 100 through the overlap disconnector 200.

[0034] In the above solution, the first driving mechanism 160 of the line access disconnector 100 drives the first moving contact 120 to rotate for opening and closing operations at three positions. The first moving contact 120 abuts against the first static contact 130 to form the working position, the first moving contact 120 abuts against the grounding contact 140 to form the grounding position, and the position where the first moving contact 120 is located between the first static contact 130 and the grounding contact 140 is the isolation position. In addition, the second driving mechanism 240 of the crossover disconnector 200 drives the second moving contact 220 to perform opening and closing operations with the second static contact 230, so that the current is conducted between two adjacent line access disconnectors 100. Thus, by replacing the two-position line access disconnector with the three-position line access disconnector 100, complex electrical interlock relationships are avoided, the grounding process of the power circuit is simplified, and the safety of the power circuit is improved.

[0035] As Figure 3 shown, the first chassis 110 and the second chassis 210 both include two channel steels 111, two base plates 112, and two insulating columns 113. The two channel steels 111 are arranged in parallel at intervals and opposite to each other. The two base plates 112 are respectively arranged at the opposite ends in the extending direction of the two channel steels 111. The two insulating columns 113 are respectively installed on the two base plates 112. The opposite ends of the first static contact 130 and the incoming line busbar 150 are both installed on the insulating columns 113. In addition, every two adjacent insulating columns 113 are arranged in parallel and perpendicular to the chassis.

[0036] Furthermore, an activity area is formed between the two base plates 112 of the first chassis 110 and the second chassis 210. The first driving mechanism 160 and the second driving mechanism 240 both include an insulating pull rod 161 and a connecting rod 162. One end of the insulating pull rod 161 on the first driving mechanism 160 is connected to the first moving contact 120, and the other end is hinged to one end of the connecting rod 162. The middle part of the connecting rod 162 is rotatably installed in the activity area, and the other end of the connecting rod 162 rotates to drive the insulating pull rod 161 to rotate the first moving contact 120, so that the first moving contact 120 abuts against the first static contact 130 or the grounding contact 140 respectively.

[0037] According to some embodiments, the grounding contact 140 is located above the incoming line busbar 150 and on the moving track of the first moving contact 120. And dynamic arcing horns 121 are provided on both the first moving contact 120 and the second moving contact 220, and static arcing horns 131 are provided on the first static contact 130, the second static contact 230, and the grounding contact 140. The dynamic arcing horn 121 and the static arcing horn 131 are abutted against each other to generate arcing between the first moving contact 120 and the first static contact 130 and the grounding contact 140 respectively, and the dynamic arcing horn 121 and the static arcing horn 131 are abutted against each other to generate arcing between the second moving contact 220 and the second static contact 230. By the abutment of the arcing horns, direct contact between the contacts is avoided, and the contacts can be effectively protected.

[0038] As shown Figure 4 in the figure, the incoming line row 150, the first moving contact 120, the second moving contact 220, the first static contact 130, and the grounding contact 140 can be single plates or two single plates arranged at intervals. In this embodiment, the incoming line row 150, the first moving contact 120, the second moving contact 220, the first static contact 130, and the grounding contact 140 include two incoming line plates arranged in parallel. The opposite ends of the incoming line row 150 and the first static contact 130 are fixedly connected to the insulating column 113 through connection holes respectively. The first moving contact 120 and the second moving contact 220 are respectively hinged to one end of the two incoming line plates through connection holes. The two incoming line plates of the grounding contact 140 are insulatingly installed above the first static contact 130 through the insulating column 113.

[0039] Furthermore, both the first transmission mechanism 160 and the second transmission mechanism 240 also include a rotating shaft 163 and a crank arm 164. The rotating shaft 163 is located within the moving area and its two ends are respectively rotatably connected to two channel steels 111. The connecting rod 162 includes a first connecting rod and two second connecting rods. One end of the first connecting rod is hinged to the crank arm 164, and the other end is fixedly connected to one side of the circumferential wall of the rotating shaft 163. The two second connecting rods are arranged in parallel, and one end of each of the two second connecting rods is fixedly connected to the other side of the circumferential wall of the rotating shaft 163, and the other end is respectively hinged to one end of the insulating pull rod 161.

[0040] One end of the crank arm 164 away from the first connecting rod is provided with a plurality of binding hoops for binding the long rod. And there is a groove on the crank arm 164. The binding hoop is U-shaped and its two ends are respectively threadedly connected to the crank arm 164. The groove and the binding hoop enclose a binding space to fit the shape of the long rod, thereby fixing the long rod. Then, the long rod is driven to move through the transmission device. The first transmission mechanism 160 and the second transmission mechanism 240 respectively fixedly connected to the long rod drive the first moving contact 120 and the second moving contact 220 to switch the closing position and opening distance of the switch, effectively avoiding the operator from switching or debugging the switch at close range and causing electric shock danger.

[0041] One end of the insulating pull rod 161 on the second transmission mechanism 240 is connected to the second moving contact 220, and the other end is hinged to one end of the connecting rod 162. The middle of the connecting rod 162 is rotatably installed within the moving area. The other end of the connecting rod 162 rotates to drive the insulating pull rod 161 to rotate the second moving contact 220, and the first moving contact 120 abuts against the second static contact 230. The ends of the other two insulating pull rods 161 connected to the first moving contact 120 and the second moving contact 220 are arc-shaped.

[0042] The integrated subway catenary switching device further includes a monitoring device (not shown in the figure). The monitoring device is disposed on one side of the incoming line disconnector 100 and each of the section disconnectors 200 to monitor the real-time states of each of the incoming line disconnectors 100 and each of the section disconnectors 200, further truly display the positions of the first moving contact 120 and the second moving contact 220, and avoid signal errors. The monitoring device may specifically be a camera. The camera may be electrically connected or communicatively connected to a human-computer interaction platform at the back end, and the positions of the first moving contact 120 and the second moving contact 220 are monitored in real time by the staff. It may also be a control device of the interaction platform at the back end, automatically monitor the position changes of the first moving contact 120 and the second moving contact 220, and give an early warning in time when a signal error occurs.

[0043] Thus, the first transmission mechanism 160 of the incoming line disconnector 100 drives the first moving contact 120 to rotate for opening and closing operations at three positions. The first moving contact 120 abuts against the first static contact 130 to form a working position, the first moving contact 120 abuts against the grounding contact 140 to form a grounding position, and the first moving contact 120 is located between the first static contact 130 and the grounding contact 140 to form an isolation position. In addition, the second transmission mechanism 240 of the section disconnector 200 drives the second moving contact 220 to open and close between the second static contact 230, so that the current is conducted between two adjacent incoming line disconnectors 100. Therefore, by replacing the two-position incoming line disconnector with a three-position incoming line disconnector 100, the complex electrical interlock relationship is avoided, the grounding process of the power circuit is simplified, and the safety of the power circuit is improved. In addition, a monitoring device may be installed to monitor the real-time states of the incoming line disconnector 100 and the section disconnector 200, further truly display the positions of the moving contacts, and transmit signals to the monitoring background. When a signal error occurs, an early warning or automatic processing can be performed.

[0044] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

Claims

1. An integrated subway catenary switching device, characterized in that, Including: At least two catenary isolators and at least one crossover isolator, with each adjacent pair of the catenary isolators connected by one of the crossover isolators; The catenary isolator includes a first chassis, a first moving contact, a first static contact, a grounding contact, an incoming line busbar, and a first drive mechanism. The incoming line busbar and the first static contact are respectively installed at opposite ends of the first chassis at intervals and insulated from each other. The first moving contact is rotatably installed at one end of the incoming line busbar. The first drive mechanism is installed on the first chassis and connected to the first moving contact to drive the first moving contact to rotate. The grounding contact is arranged at an interval from the first static contact, and both the first static contact and the grounding contact are located on the rotation trajectory of the first moving contact; The crossover isolator includes a second chassis, a second moving contact, a second static contact, and a second drive mechanism. The opposite ends of two adjacent incoming line busbars away from the first moving contact are respectively installed at opposite ends of the second chassis at intervals and insulated from each other. The second moving contact is rotatably installed on one of the incoming line busbars. The second static contact is an integral structure with the other incoming line busbar. The second drive mechanism is installed on the first chassis and connected to the second moving contact to drive the second moving contact to rotate until it abuts against the second static contact; Double rows of connection holes are provided on opposite sides of the incoming line busbar, the first moving contact, the second moving contact, the first static contact, and the grounding contact; Both the first drive mechanism and the second drive mechanism include insulating tie rods, and the ends of the two insulating tie rods respectively connected to the first moving contact and the second moving contact are arc-shaped.

2. The integrated subway catenary switching device according to claim 1, wherein Both the first chassis and the second chassis include two channel steels, two base plates, and two insulating columns. The two channel steels are arranged in parallel at intervals and opposite to each other. The two base plates are respectively arranged at opposite ends of the two channel steels in the extending direction. The two insulating columns are respectively installed on the two base plates. Opposite ends of the first static contact and the incoming line busbar are installed on the insulating columns.

3. The integrated subway catenary switching device according to claim 2, wherein Each adjacent pair of the insulating columns is arranged in parallel and perpendicular to the first chassis.

4. The integrated subway catenary switching device according to claim 2, wherein An activity area is formed between the two base plates of both the first chassis and the second chassis; Both the first drive mechanism and the second drive mechanism include connecting rods. One end of the insulating tie rod on the first drive mechanism is connected to the first moving contact, and the other end is hinged to one end of the connecting rod. The middle of the connecting rod is rotatably installed in the activity area, and the other end of the connecting rod rotates to drive the insulating tie rod to rotate the first moving contact; One end of the insulating pull rod on the second transmission mechanism is connected to the second moving contact, and the other end is hinged to one end of the connecting rod. The middle part of the connecting rod is rotatably installed in the active area, and the other end of the connecting rod rotates to drive the insulating pull rod to rotate the second moving contact.

5. The integrated subway overhead contact network switching device according to claim 1, characterized in that: The first moving contact and the second moving contact are both provided with moving arc-striking rods, and the first stationary contact, the second stationary contact and the grounding contact are both provided with stationary arc-striking rods; The first moving contact respectively contacts the first stationary contact and the grounding contact via the moving arc-striking rod and the stationary arc-striking rod to strike an arc; the second moving contact contacts the second stationary contact via the moving arc-striking rod and the stationary arc-striking rod to strike an arc.

6. The integrated subway overhead contact network switching device according to claim 4, characterized in that: The first transmission mechanism and the second transmission mechanism also include a rotating shaft and a crank arm. The rotating shaft is located in the active area and its two ends are rotatably connected to the two channel steels respectively. The connecting rod includes a first connecting rod and two second connecting rods. One end of the first connecting rod is hinged to the crank arm, and the other end is fixedly connected to one side of the peripheral wall of the rotating shaft. The two second connecting rods are arranged in parallel, and one end of the two second connecting rods is respectively fixedly connected to the other side of the peripheral wall of the rotating shaft, and the other end is respectively hinged to one end of the insulating pull rod.

7. The integrated subway overhead contact network switching device according to claim 6, characterized in that: A plurality of binding hoops are provided at one end of the crank arm away from the first connecting rod.

8. The integrated subway overhead contact network switching device according to claim 1, characterized in that: It also includes a monitoring device, which is arranged on one side of the online isolating switch and each of the inter-regional isolating switches to monitor the real-time status of each of the online isolating switch and each of the inter-regional isolating switches.

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