Leakage current connection device

Abstract

The present invention relates to the field of current detection technology, and specifically to a leakage current connection device. The leakage current connection device of the present invention comprises a connection component, a collection component and a processor. The connection component comprises a drainage component and a current sensor. The drainage component is suitable for being connected to the upper and lower supporting connectors of a platform door. The drainage component is used to draw out the leakage current on the upper and lower supporting connectors of the platform door. The current sensor is connected to the drainage component to detect the leakage current on the drainage component. One end of the collection component is connected to the drainage component, and the other end of the collection component is suitable for grounding. The processor is connected to the current sensor. The current sensor transmits the detected leakage current data to the processor. The processor judges the state of the platform door according to the received leakage current data. The leakage current connection device proposed by the present invention can improve the accuracy of the current connected by the connection system.

Description

Technical Field

[0001] The invention relates to the technical field of current detection, and in particular to a leakage current connection device. Background Art

[0002] Most subway trains use a DC power supply system, and use the rails as return rails. The platform doors are connected to the rails at the same potential. In order to prevent stray currents from corroding underground metal pipelines, the rails and the ground are insulated. At the same time, in order to prevent passengers from touching the platform doors installed on the platform when getting on and off the train, which may cause the risk of electric shock, insulating upper and lower supporting connectors are used on the top and bottom of the platform door structure. The leakage current of the insulating upper and lower supporting connectors is led out through a lead-in device. In the related art, the lead-in device is wrapped around or sleeved on the insulating upper and lower supporting connectors to lead out the current on the insulating upper and lower supporting connectors. Due to the different shapes and sizes of the insulating upper and lower supporting connectors, the corresponding sensor sizes in the lead-in device are not uniform, resulting in low accuracy of the current led out by the lead-in device. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a leakage current connection device, which can improve the accuracy of the current connected by the connection system.

[0004] The leakage current connection device of the embodiment of the present invention includes: a connection component, the connection component includes a drainage component and a current sensor, the drainage component is suitable for being connected to the upper and lower supporting connectors of the platform door, the drainage component is used to draw out the leakage current on the upper and lower supporting connectors of the platform door, and the current sensor is connected to the drainage component to detect the leakage current on the drainage component; a collection component, one end of the collection component is connected to the drainage component, and the other end of the collection component is suitable for grounding; a processor, the processor is connected to the current sensor, the current sensor transmits the detected leakage current data to the processor, and the processor judges the insulation status of each of the upper and lower supporting connectors of the platform door according to the received leakage current data.

[0005] The leakage current connection device of the embodiment of the present invention can improve the accuracy of the current connected by the connection system.

[0006] In some embodiments, the drainage component includes a drainage line, one end of which is connected to the upper and lower supporting connectors of the platform door, and the other end of the drainage line is connected to the current sensor and the collection component in sequence, and the current sensor is used to detect the current in the drainage line.

[0007] In some embodiments, the drainage component also includes a drainage device, which is suitable for connecting to the upper and lower supporting connectors of the platform door, and one end of the drainage line is connected to the drainage device.

[0008] In some embodiments, the connection assembly further includes an insulating plate, the drainage device is mounted on the upper and lower supporting connectors, and the insulating plate is disposed on a side of the drainage device away from the upper and lower supporting connectors.

[0009] In some embodiments, the leakage current diversion device further includes a first insulating connector, which passes through the upper and lower supporting connectors, the diversion device and the insulating plate in sequence.

[0010] In some embodiments, the first insulating connector includes a sealing insulating cap, an insulating sleeve gasket and a bolt, the bolt passes through the upper and lower supporting connectors, the drainage device and the insulating plate in sequence, the sealing insulating cap is sleeved on the bolt, and the insulating sleeve gasket is arranged between the bolt and the upper and lower supporting connectors.

[0011] In some embodiments, the collecting assembly includes a collecting row, and at least one connecting port is provided on the collecting row, and the connecting port is connected to the drainage line.

[0012] In some embodiments, the number of the connection ports is set to multiple, and the multiple connection ports are arranged at intervals in the length direction of the collection row.

[0013] In some embodiments, the leakage current connection device further includes a second connector and a third connector, wherein the second connector is disposed between the drainage line and the drainage device, and the third connector is disposed between the drainage line and the connection port. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of a leakage current connection device according to an embodiment of the present invention.

[0015] Figure 2 It is a partial enlarged view of the leakage current connection device according to the embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of the connection between the leakage current connection device and the platform door according to an embodiment of the present invention.

[0017] Reference numerals:

[0018] Leading assembly 1, drainage component 11, drainage line 111, drainage device 112, current sensor 12, insulating plate 13,

[0019] Collection component 2, collection row 21, connection port 211, ground terminal 212,

[0020] Platform door 3, upper and lower support connectors 31,

[0021] First insulating connector 4, sealing insulating cap 41, insulating sleeve gasket 42, bolt 43,

[0022] A second connecting member 5 , a third connecting member 6 , and a processor 7 . DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figure 1-3 As shown, the leakage current connection device according to the embodiment of the present invention includes a connection component 1, a collection component 2 and a processor 7.

[0025] In some embodiments, the lead assembly 1 includes a flow guide component 11 and a current sensor 12. The flow guide component 11 is suitable for connecting to the upper and lower supporting connectors 31 of the platform door 3. The flow guide component 11 is used to guide the leakage current on the upper and lower supporting connectors 31 of the platform door 3. The current sensor 12 is connected to the flow guide component 11 to detect the leakage current on the flow guide component 11. One end of the collection component 2 is connected to the flow guide component 11, and the other end of the collection component 2 is suitable for grounding. The processor 7 is connected to the current sensor 12, and the current sensor 12 transmits the detected leakage current data to the processor 7. The processor 7 determines the insulation status of each upper and lower supporting connector 31 of the platform door 3 according to the received leakage current data.

[0026] Specifically, one end of the drainage component 11 is connected to the upper and lower supporting connectors 31, the other end of the drainage component 11 is connected to the collecting component 2, one end of the collecting component 2 is grounded, and the current sensor 12 detects the current drawn out by the drainage component 11, and then transmits the current drawn out by the drainage component 11 to the ground through the connection between the drainage component 11 and the collecting component 2.

[0027] Optionally, the current sensor 12 can be sleeved on the drainage component 11. When the leakage current flows through the drainage component 11, the current sensor 12 can detect the leakage current led by the drainage component 11, so as to facilitate the subsequent judgment of the insulation status of the upper and lower supporting connectors 31 to the ground according to the value of the leakage current detected by the current sensor 12.

[0028] Optionally, the number of the connecting components 1 is set to one or more. When the number of the connecting components 1 is multiple, the drainage components 11 of the multiple connecting components 1 are all connected to the collecting component 2, and the leakage current connected by the multiple drainage components 11 is introduced into the ground through the grounding of the collecting component 2.

[0029] It can be understood that when the number of the connecting components 1 is set to multiple, each connecting component 1 includes a drainage component 11 and a current sensor 12, and each drainage component 11 is connected to the collecting component 2, and each drainage component 11 is provided with a current sensor 12 to detect the leakage current drained by each drainage component 11.

[0030] Optionally, multiple current sensors 12 are connected to the processor 7, and the multiple current sensors 12 transmit the data of the detected leakage current to the processor 7. The processor 7 determines the insulation status of the upper and lower supporting connectors 31 at different positions of the platform door 3 to the ground based on the received data of the multiple leakage currents.

[0031] The embodiment of the present invention sets a drainage component 11 on the upper and lower supporting connectors 31 of the platform door 3, and detects the current drained by the drainage component 11 through a standard current sensor 12. Compared with the non-standard current sensor 12 used in the related art, the non-standard current sensor 12 has low measurement accuracy. The leakage current connection device of this embodiment adopts a standard current sensor 12 to connect with the drainage component 11, which can improve the accuracy of the leakage current detected by the leakage current connection device.

[0032] For example, subway platform doors 3 are mostly powered by DC, and use rails as return rails. The rails are connected to the grounding busbar and the ground grid of the traction substation. The door body of the platform door 3 and the rails are connected at an equipotential connection. The top and bottom of the door body of the platform door 3 are insulated to ensure the safety of passengers getting on and off the train. The leakage current at the upper and lower supporting connectors 31 of the platform door 3 is led out through a leakage current leading device. The insulation performance of the upper and lower supporting connectors 31 of the platform door 3 to the ground is judged based on the data of the led leakage current to ensure the safety of the train and passengers.

[0033] In some embodiments, the drainage component 11 includes a drainage wire 111, one end of the drainage wire 111 is connected to the upper and lower supporting connectors 31, and the other end of the drainage wire 111 is connected to the current sensor 12 and the collection component 2 in sequence. The current sensor 12 is used to detect the current in the drainage wire 111.

[0034] Specifically, one end of the drain wire 111 is connected to the upper and lower supporting connectors 31, and the other end of the drain wire 111 is connected to the collecting component 2. The leakage current of the upper and lower supporting connectors 31 is led out to the collecting component 2 through the drain wire 111. By connecting the current sensor 12 to the drain wire 111, the current sensor 12 can detect the leakage current on the drain wire 111.

[0035] Optionally, by providing the drainage line 111 , the drained leakage current can be transmitted to the collecting component 2 , thereby improving the detection accuracy of the current sensor 12 .

[0036] For example, the drainage wire 111 is a conventional wire, which is directly connected to the upper and lower supporting connectors 31 and the collecting component 2 through the drainage wire 111, and then connected to the current sensor 12 through the drainage wire 111, so that the current sensor 12 can detect the leakage current on the drainage wire 111, thereby improving the detection accuracy of the current sensor 12.

[0037] For example, the current sensor 12 can be directly connected to the drainage wire 111, or it can be sleeved on the drainage wire 111. The present invention does not limit the specific connection method between the current sensor 12 and the drainage wire 111. As long as the current sensor 12 can detect the leakage current on the drainage wire 111, it falls within the protection scope of the present invention.

[0038] In some embodiments, the drainage component 11 further includes a drainage device 112 , which is suitable for being connected to the upper and lower supporting connectors 31 of the platform door 3 , and one end of the drainage line 111 is connected to the drainage device 112 .

[0039] Specifically, the drainage device 112 is arranged below the upper and lower supporting connectors 31, and the leakage current on the upper and lower supporting connectors 31 is drawn out through the drainage device 112, and then one end of the drainage line 111 is connected to the drainage device 112, and the other end of the drainage line 111 is connected to the collecting component 2, so that the leakage current drawn out by the drainage device 112 is drawn out to the collecting component 2 through the drainage line 111.

[0040] Optionally, the drainage device 112 is arranged below the upper and lower supporting connectors 31, and the size of the upper surface of the drainage device 112 is larger than the size of the lower surface of the upper and lower supporting connectors 31, so as to increase the contact area between the drainage device 112 and the upper and lower supporting connectors 31, ensuring that the drainage device 112 can completely drain the leakage current.

[0041] Compared with the related art, when measuring the leakage current on the upper and lower supporting connectors 31 during the operation of the subway, it is necessary to surround or set the current transformer on the upper and lower supporting connectors 31 as a whole. Since the shapes of the upper and lower supporting connectors 31 are different, the standard current sensor 12 is difficult to meet the detection of the leakage current on the upper and lower supporting connectors 31 with different shapes. The current transformer is large in size and low in measurement accuracy, resulting in low accuracy of the measured leakage current. The current sensor 12 used in the embodiment of the present invention is a standard current sensor 12. The standard current sensor 12 is low in price, small in size, and high in measurement accuracy, which is beneficial for the current sensor 12 to detect the current in the drainage component, thereby improving the detection accuracy of the leakage current drained by the leakage current connection device.

[0042] In some embodiments, the connection assembly 1 further includes an insulating plate 13 , the drainage device 112 is mounted on the upper and lower supporting connectors 31 , and the insulating plate 13 is disposed on a side of the drainage device 112 away from the upper and lower supporting connectors 31 .

[0043] Specifically, the insulating plate 13 is disposed below the drainage device 112 , and the drainage device 112 is disposed below the upper and lower supporting connectors 31 , that is, the drainage device 112 is located between the upper and lower supporting connectors 31 and the insulating plate 13 .

[0044] Optionally, by setting an insulating plate 13, the drainage device 112 is kept insulated from the civil structure under the platform door 3 to prevent current shunting and ensure that the drainage device 112 draws out the leakage current. The leakage current is detected by the current sensor 12 to improve the detection accuracy of the leakage current.

[0045] Optionally, the end surface of one side where the drainage device 112 is connected to the drainage line 111 is an arcuate surface or a rectangular surface. By setting the end surface of one side where the drainage device 112 is connected to the drainage line 111 as an arcuate surface, the residence time of water on the drainage device 112 is reduced, and the water on the surface of the drainage device 112 is easily drained away. The end surface of one side where the drainage device 112 is connected to the drainage line 111 can also be set as a rectangular surface, that is, the end surface of one side where the drainage device 112 is connected to the drainage line 111 can be an arcuate surface or a rectangular surface.

[0046] Optionally, the other three side end surfaces of the drainage device may be arcuate surfaces or rectangular surfaces. In the embodiment of the present invention, the four side end surfaces of the drainage device are all arcuate surfaces.

[0047] In some embodiments, the lead-in assembly 1 further includes a first insulating connector 4 , which passes through the upper and lower supporting connectors 31 , the drainage device 112 , and the insulating plate 13 in sequence.

[0048] Specifically, the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13 are connected in sequence through the first insulating connector 4 to achieve the fixation of the relative positions between the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13. The first insulating connector 4 passes through the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13 to improve the connection stability between the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13.

[0049] Optionally, the first insulating connector 4 can also connect the upper and lower supporting connectors 31 to the platform, and the insulating connection between the upper and lower supporting connectors 31 and the platform facilitates the lead-in component 1 to lead out the leakage current.

[0050] In some embodiments, the first insulating connector 4 includes a sealing insulating cap 41, an insulating sleeve gasket 42 and a bolt 43. The bolt 43 passes through the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13 in sequence. The sealing insulating cap 41 is sleeved on the bolt 43, and the insulating sleeve gasket 42 is arranged between the bolt 43 and the upper and lower supporting connectors 31.

[0051] Specifically, the bolts 43 connect the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13, the insulating sleeve gasket 42 is arranged between the bolts 43 and the upper and lower supporting connectors 31, and the sealing insulating cap 41 is arranged on the bolts 43 exposed to the outside to prevent the bolts 43 from short-circuiting and shunting with the upper and lower supporting connectors.

[0052] Optionally, there are multiple insulating connectors, and the multiple insulating connectors can maintain the assembly stability of the upper and lower supporting connectors 31, the drainage device 112 and the insulating plate 13.

[0053] For example, the sealing insulating cap 41 and the upper and lower supporting connectors 31 are connected by sealant, so that the sealing insulating cap 41 and the upper and lower supporting connectors 31 can be tightly connected, which has good dustproof and waterproof effects and prevents the bolts 43 and the upper and lower supporting connectors 31 from short-circuiting and shunting.

[0054] It is understandable that the insulating sleeve gasket 42 is made of insulating material to prevent leakage current from being transmitted to other locations by the metal bolt 43, thereby improving the accuracy of the leakage current.

[0055] In some embodiments, the collecting assembly 2 includes a collecting row 21 , and at least one connecting port 211 is provided on the collecting row 21 . The connecting port 211 is connected to the drainage line 111 .

[0056] Specifically, the drainage line 111 is connected to the collecting bar 21, and the drainage line 111 transmits the leakage current drained out by the drainage device 112 to the collecting bar 21. The collecting bar 21 transmits the received leakage current to the grounding position on the collecting bar 21, and transmits the collected leakage current to the earth through the grounding of the collecting bar 21.

[0057] For example, the outer surface of the collecting bar 21 needs to be coated with anti-corrosion material to enhance its durability.

[0058] In some embodiments, the number of the connection ports 211 is set to be multiple, and the multiple connection ports 211 are arranged at intervals in the length direction of the collection row 21 .

[0059] Specifically, the number of connection ports 211 is multiple, and the multiple connection ports 211 are respectively connected to the multiple drainage lines 111, so that the leakage current on the multiple upper and lower supporting connectors 31 can be transmitted to the collecting row 21 through the multiple drainage lines 111, and the leakage current in the multiple drainage lines 111 can be detected by multiple current sensors 12 to realize the detection of the insulation status of the multiple upper and lower supporting connectors 31. Therefore, the leakage current information of each upper and lower supporting connector 31 on the platform door can be fed back, so that the operation and maintenance personnel can understand the insulation status of the upper and lower supporting connectors 31 to the ground.

[0060] Optionally, when the leakage current exceeds a preset value, the upper and lower supporting connectors 31 with insulation failure hazards can be quickly identified, thereby accurately locating the location of the hazard and achieving rapid repair of the upper and lower supporting connectors 31 with insulation failure hazards.

[0061] In some embodiments, the leakage current connection device further includes a second connection member 5 and a third connection member 6 , wherein the second connection member 5 is disposed between the drainage line 111 and the drainage device 112 , and the third connection member 6 is disposed between the drainage line 111 and the connection port 211 .

[0062] Specifically, one end of the second connector 5 is connected to the drainage line 111, and the other end of the second connector 5 is connected to the drainage device 112. One end of the third connector 6 is connected to the connection port 211, and the other end of the third connector 6 is connected to the drainage line 111.

[0063] For example, the second connecting member 5 is a ring-type OT terminal, and the end of the drainage wire 111 connected to the drainage device 112 is connected to the tail of the ring-type OT terminal, and then the head of the ring-type OT terminal is fixed on the drainage device 112 to ensure a reliable connection between the drainage wire 111 and the drainage device 112.

[0064] For example, the third connecting member 6 is a ring-type OT terminal, the end of the drainage line 111 connected to the collection row 21 is connected to the tail of the ring-type OT terminal, and then the head of the ring-type OT terminal is fixed at the connection port 211 to ensure a reliable connection between the drainage line 111 and the connection port 211.

[0065] It is understandable that a through hole is reserved on the drainage device 112 to facilitate the connection between the drainage line 111 and the drainage device 112 .

[0066] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A leakage current connection device, characterized in that: include: A lead-in assembly, the lead-in assembly comprising a lead-in component and a current sensor, the lead-in component is suitable for being connected to the upper and lower supporting connectors of the platform door, the lead-in component is used to lead out the leakage current on the upper and lower supporting connectors of the platform door, the current sensor is connected to the lead-in component to detect the leakage current on the lead-in component, and the current sensor is a standard current sensor; A collecting component, one end of which is connected to the drainage component, and the other end of which is suitable for grounding; A processor, the processor is connected to the current sensor, the current sensor transmits the detected leakage current data to the processor, and the processor determines the insulation status of each of the upper and lower supporting connectors of the platform door according to the received leakage current data; The drainage component includes a drainage line and a drainage device, one end of the drainage line is connected to the upper and lower supporting connecting parts, and the other end of the drainage line is connected to the current sensor and the collecting component in sequence, the current sensor is used to detect the current in the drainage line, and the drainage device is suitable for being connected to the upper and lower supporting connecting parts of the platform door, and one end of the drainage line is connected to the drainage device.

2. The leakage current connection device according to claim 1, characterized in that: The connection assembly further comprises an insulating plate. The drainage device is mounted on the upper and lower supporting connectors. The insulating plate is arranged on a side of the drainage device away from the upper and lower supporting connectors.

3. The leakage current connection device according to claim 2, characterized in that: It also includes a first insulating connector, which passes through the upper and lower supporting connectors, the drainage device and the insulating plate in sequence.

4. The leakage current connection device according to claim 3, characterized in that: The first insulating connector includes a sealing insulating cap, an insulating sleeve gasket and a bolt. The bolt passes through the upper and lower supporting connectors, the drainage device and the insulating plate in sequence. The sealing insulating cap is sleeved on the bolt, and the insulating sleeve gasket is arranged between the bolt and the upper and lower supporting connectors.

5. The leakage current connection device according to claim 1, characterized in that: The collecting assembly comprises a collecting row, and at least one connecting port is provided on the collecting row, and the connecting port is connected to the drainage line.

6. The leakage current connection device according to claim 5, characterized in that: The number of the connection ports is set to be multiple, and the multiple connection ports are arranged at intervals in the length direction of the collection row.

7. The leakage current connection device according to claim 5, characterized in that: It also includes a second connecting member and a third connecting member, wherein the second connecting member is arranged between the drainage line and the drainage device, and the third connecting member is arranged between the drainage line and the connection port.

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