Railway switch contact cover and working method

Abstract

The present invention discloses a railway switch contact cover and operating method, which primarily addresses the current problems of high contact resistance and high rotational resistance of the moving contact caused by wear particles, dust, oil stains, and the like in the contact area between the moving contact ring and the static contact ring. The implementation method is as follows: first, the moving contact ring self-cleaning system is used to clean the switch's mobile contacts; second, the contact temperature control system is used to adjust the temperature of the contact area to prevent condensation; and finally, a contact resistance detection device is used to monitor the real-time changes in contact resistance, significantly reducing the maintenance and servicing workload for maintenance personnel on the switch's contacts. This railway switch contact cover and operating method has a simple structure and can clean foreign matter from its own contact ring area, thereby reducing contact resistance, reducing resistance to the moving contact ring coming out, preventing contact obstruction, and ensuring reliable connection of the contact circuit.

Description

Technical Field

[0001] The present invention belongs to the field of electromechanical technology, and relates to a mechatronics product with improved working reliability of railway switch contacts, which can be used for maintenance and monitoring of railway switch contacts, and in particular to a railway switch contact cover and a working method. Technical Background

[0002] The switch machine is a switching device for turnouts. Its main function is to switch and lock the turnout point rail, indicate and monitor the position and status of the turnout point rail or point rail in the interlocking area, and is of great significance for the automatic and remote control of railway signal lights.

[0003] The indicator mechanism within a switch machine is crucial for confirming whether the switch has been switched as required and providing information on the switch status during railway turnout switching. Contacts, a crucial component of this indicator mechanism, act as switches that indicate circuit continuity and are a key component in providing these signals. Therefore, the reliability of switch contacts plays a crucial role in train safety.

[0004] There are two main types of common faults in switch contacts: one is contact slowing, which is primarily caused by increased sliding friction due to the increased friction coefficient caused by electro-corrosion oxide particles and wear particles in the contact area between the moving and static contacts of the contact mechanism; the other is contact signal loss, which is primarily caused by the increased resistance caused by the inclusion of non-conductive media such as nickel oxide particles, dust, grease, and condensation in the moving and static contacts of the switch, resulting in a temporary circuit failure. In summary, it can be seen that switch contact failures are primarily caused by foreign matter in the contact area between the moving and static contacts. Therefore, proper cleaning of the contacts is crucial to reducing switch contact failures.

[0005] At present, the maintenance of switch machine contacts is mainly carried out by cleaning during regular maintenance time. The method is to open the switch machine cover, disconnect the switch machine circuit, and wipe it with a cleaning cloth. Due to the short time and heavy workload of on-site maintenance, manual cleaning of switch machine contacts causes a huge workload for maintenance personnel. Therefore, a switch machine contact cover with contact ring self-cleaning function, contact local temperature and humidity monitoring function, and contact resistance monitoring function was born. The switch machine contact cover is characterized by simple structure, easy installation and disassembly, and easy maintenance. Summary of the Invention

[0006] The purpose of the present invention is to address the shortcomings of the above-mentioned existing technologies and to propose a railway switch contact cover and working method with a simple structure that can clean foreign objects in its own contact ring area to reduce contact resistance, reduce the resistance of the moving contact ring to be disengaged, prevent contact obstruction, ensure reliable connection of the contact circuit, and significantly reduce the maintenance and servicing workload of maintenance personnel on the switch machine contacts.

[0007] In order to solve the above problems, the purpose of the present invention is achieved in this way. It relates to a railway switch contact cover and a working method, which is characterized by comprising: an indoor monitoring host, an outdoor controller, a self-cleaning module, a temperature adjustment module, a contact resistance detection and acquisition module, and a liquid level acquisition module; the indoor monitoring host is connected to the outdoor controller through a network to issue power supply instructions and monitor the operation of the outdoor controller; the cleaning liquid level acquisition module of the self-cleaning module is connected to the outdoor controller and the indoor monitoring host respectively through the network; the temperature and humidity sensor of the temperature adjustment module is connected to the outdoor controller through the network, and the outdoor controller is connected to the indoor monitoring host through the network to collect, transmit and monitor temperature and humidity data; when the temperature and humidity conditions reach condensation conditions, the indoor monitoring host sends a temperature adjustment instruction to the temperature control module through the outdoor controller; the contact resistance detection and acquisition module is connected to the outdoor controller and the indoor monitoring host respectively through the network to detect, collect, transmit and monitor the voltage and current of all contacts of the switch.

[0008] The present invention relates to a method for operating a switch contact cover, which specifically comprises the following steps:

[0009] In the first step, the indoor monitoring host receives the data information sent by the outdoor controller in real time and draws a real-time curve on the real page for maintenance personnel to access and view;

[0010] In the second step, the indoor controller polls the number, status and real-time data of the switch machine self-cleaning module and determines whether the switch machine needs maintenance through the warning line;

[0011] (2a) When the indoor controller determines that the cleaning fluid level of the self-cleaning module is low, the indoor controller sends a maintenance alarm to the maintenance personnel to replenish the cleaning fluid of the self-cleaning module;

[0012] (2b) When the indoor controller determines that the cleaning fluid level data of the self-cleaning module is abnormal, the indoor controller sends a self-cleaning module fault maintenance alarm to the maintenance personnel;

[0013] In the third step, the switch motorized contact assembly disconnects the left static contact and sweeps the brush head of the self-cleaning device in the middle of the rotation. The brush head removes foreign matter in the contact area between the moving contact ring and the static contact piece, and wipes off the oil stains on the moving contact ring.

[0014] In the fourth step, the vibration of the brush head causes the cleaning liquid to flow out of the cleaning liquid storage tank along the slow permeation layer and reattach to the brush head, waiting for the next cleaning;

[0015] Step 5: When the temperature and humidity in the contact cover area monitored by the temperature control module in real time approach condensation conditions, the indoor monitoring host sends a command to the outdoor controller to start the temperature control program, turn on the heating element and fan power, and blow hot air into the contact area to increase the ambient temperature and prevent condensation at the contact;

[0016] Step 6: When the temperature rises, the moisture content in the air increases, and the data collected by the temperature and humidity sensors do not constitute condensation conditions, the indoor monitoring host sends a temperature control command to the outdoor controller, and the outdoor controller turns off the power of the fan and heating element, and the fan and heating element stop working;

[0017] In the seventh step, the contact resistance detection module detects the contact voltage and current values ​​through three pairs of Hall voltage / current sensors, calculates the contact resistance value, and then transmits the detection data to the indoor monitoring host through the outdoor controller;

[0018] In the eighth step, when the value of the contact resistance exceeds the warning value or is abnormal, the indoor monitoring host sends an alarm to remind the maintenance personnel that the contact resistance needs manual maintenance.

[0019] The present invention has the following advantages:

[0020] 1) The structure is simple. The contact cleaning device uses the kinetic energy generated by the operation of the switch motorized contact to clean the foreign matter in its own contact ring area, thereby reducing the contact resistance, reducing the resistance of the moving contact ring to come out, and preventing the contact from getting stuck.

[0021] 2) The temperature control system can be used to control the temperature of the local area of ​​the switch machine contact, which can prevent condensation on the contact piece and ensure the reliability of the contact circuit connection.

[0022] 3) The contact resistance monitoring system can monitor the changes in the resistance value of the switch machine contacts in real time and provide maintenance warning intervals, which can significantly reduce the maintenance workload of maintenance personnel on the switch machine contacts.

[0023] The present invention will be further described below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the composition of a railway switch contact cover system of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a railway switch contact cover of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of a railway switch contact cover according to the present invention;

[0027] Figure 4 This is a schematic diagram of the contact self-cleaning module of the present invention;

[0028] Figure 5 This is a schematic diagram of the temperature control module of the present invention;

[0029] Figure 6 This is a schematic diagram of a contact resistance detection module of the present invention;

[0030] Figure 7 This is a schematic diagram of the connection state of the left contact of the moving contact group of the present invention;

[0031] Figure 8 This is a schematic diagram of the intermediate state of the moving contact group of the present invention;

[0032] Figure 9 This is a schematic diagram of the connection state of the right contact of the movable contact group of the present invention;

[0033] Figure 10 Schematic diagram of the workflow and steps of the present invention.

[0034] In the figure: 1. Indoor monitoring host; 2. Outdoor controller; 3. Self-cleaning module; 31. Contact cover mounting bolts; 32. Contact cover shell; 33. Sealing gasket; 34. Second self-cleaning unit; 35. First self-cleaning unit; 351. Hollow support column; 352. Cleaning liquid storage tank; 353. Cleaning liquid storage tank cover; 354. Self-cleaning device mounting nut; 355. Cleaning liquid; 356. Storage tank slow permeation layer; 357. Upper permeation hole; 358. Column slow permeation layer; 359. First lower permeation hole; 3510. First center brush head; 3511. Second lower permeation hole; 3512. Second center brush head; 3513. Liquid level sensor; 36. First side brush mounting block; 37. First side brush; 38. Second side brush mounting block; 39. Second side brush; 4. Temperature control module; 41. Temperature control module support bracket; 42. First temperature control unit; 43. Second temperature adjustment unit; 44. Fan; 45. Heating element; 46. Dust and oil absorption net; 47. First temperature and humidity sensor; 48. Second temperature and humidity sensor; 49. Fan shaft; 410. Micro motor;

[0035] 5. Contact resistance detection module; 51. First Hall voltage / current sensor; 52. Second Hall

[0036] Hall voltage / current sensor; 53. Third Hall voltage / current sensor; 54. Fourth Hall voltage / current sensor; 55. Fifth Hall voltage / current sensor; 56. Sixth Hall voltage / current sensor; 6. Contact post group; 61. First contact post; 62. Second contact post; 63. Third contact post; 64. Fourth contact post; 65. Fifth contact post; 66. Sixth contact post; 7. Static contact group; 71. First static contact piece; 72. Second static contact piece; 73. Third static contact piece; 74. Fourth static contact piece; 75. Fifth static contact piece; 76. Sixth static contact piece; 8. Moving contact group; 81. First moving contact ring; 82. Second moving contact ring; 83. Third moving contact ring; 9. Contact seat; 10. Liquid level acquisition module. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and methods adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and methods of the present invention are described in detail below with reference to the accompanying drawings and examples.

[0038] like Figure 1 As shown, the present invention provides a system composition diagram of a railway switch contact cover and a working method, wherein the indoor monitoring host 1 is connected to the outdoor controller 2 via a network to issue power supply instructions and monitor the operation of the outdoor controller 2; the cleaning liquid 355 level sensor of the self-cleaning module 3 is connected to the outdoor controller 2 and the indoor monitoring host 1 in sequence via the network; the temperature and humidity sensors of the temperature adjustment module 4 are connected to the outdoor controller 2 via the network, and the outdoor controller 2 is connected to the indoor monitoring host 1 via the network to collect, transmit and monitor temperature and humidity data; when the temperature and humidity conditions reach the condensation conditions, the indoor monitoring host 1 sends a temperature adjustment instruction to the temperature control module 4 via the outdoor controller 2, and the contact resistance detection and acquisition module 5 is connected to the outdoor controller 2 and the indoor monitoring host 1 in sequence via the network to detect, collect, transmit and monitor the voltage and current of all contacts of the switch.

[0039] like Figure 2 、 Figure 3 and Figure 4 As shown, the present invention relates to a railway switch contact cover and a working method, which is characterized by: including a self-cleaning module 3, a temperature control module 4, a contact resistance detection module 5, a contact column 6, a static contact piece 7, a moving contact 8, and a contact seat 9; the self-cleaning module 3 includes: a contact cover mounting bolt 31, a contact cover shell 32, a sealing gasket 33, a second self-cleaning device 34, and a first self-cleaning device 35; the contact cover mounting bolt 31 of the self-cleaning module 3 fixes the contact cover shell 32, the sealing gasket 33 and the temperature control module support frame 41 of the temperature control module 4 to the contact seat 9; the contact column 6 is connected to the static contact piece 7 through a bolt; the static contact piece 7 is in contact with the moving contact 8; the temperature control module 4 is installed above the contact cover shell 32 of the self-cleaning module 3 through the temperature control module support frame 41.

[0040] like Figure 3 and Figure 4As shown, the self-cleaning device 35 includes: a hollow supporting column 351, a cleaning liquid storage tank 352, a cleaning liquid storage tank cover 353, a self-cleaning device mounting nut 354, a cleaning liquid 355, a storage tank slow permeation layer 356, an upper permeation hole 357, a column slow permeation layer 358, a lower permeation hole 359, a first center brush head 3510, a lower permeation hole 3511, and a second center brush head 3512; the hollow supporting column 351 of the first self-cleaning unit 35 in the self-cleaning module 3 is formed by self-cleaning. The cleaning device mounting nut 354 presses the cleaning liquid storage tank 352 with the cleaning liquid storage tank cover 353 onto the contact cover 32; the lower end of the hollow support column 351 of the first self-cleaning unit 35 is a square cavity, and the two sides are connected to the first central brush head 3510 and the second central brush head 3512 through the lower penetration hole 359 and the lower penetration hole 3511 respectively; the cleaning liquid storage tank 352 has two layers of slow penetration layer 356 at the upper end for cleaning liquid 355 and the lower end for storage tank; the slow penetration layer 356 of the storage tank is connected to the first central brush head 3510 and the second central brush head 3512 through the lower penetration hole 359 and the lower penetration hole 3511 respectively; The upper permeation hole 357 of the core support column 351 is connected to the column slow permeation layer 358; the lower end of the hollow support column 351 of the first self-cleaning unit 35 is a square cavity with a first central brush head 3510 and a second central brush head 3512 installed on both sides; a liquid level sensor 3513 floats on the cleaning liquid 355, and the liquid level sensor 3513 is connected to the liquid level acquisition module 10 through a cable; the first side brush 37 is fixedly connected to the left wall of the contact cover 32 through the first side brush mounting block 36; the second side brush 3 9 is fixedly connected to the right side wall of the contact cover 32 through the second side brush mounting block 38; the temperature control module support frame 41 of the temperature control module 4 is fixedly connected to the first temperature control unit 42 and the second temperature control unit 43 respectively; the first temperature control unit 42 is connected to the fan 44 and the heating element 45 respectively through the fan shaft 49; the dust and oil absorption net 46, the first temperature and humidity sensor 47, and the second temperature and humidity sensor 48 of the temperature control module 4 are fixedly connected to the corresponding mounting holes on the contact cover 32 respectively.

[0041] like Figure 5 As shown, the temperature control module 4 includes: a temperature control module support frame 41, a first temperature control unit 42, a second temperature control unit 43, a fan 44, a heating element 45, a dust-proof and oil-absorbing net 46, a first temperature and humidity sensor 47, a second temperature and humidity sensor 48, a fan shaft 49, and a micro motor 410. The temperature control module support frame 41 of the temperature control module 4 is fixedly connected to the first temperature control unit 42 and the second temperature control unit 43 respectively; the first temperature control unit 42 is connected to the fan 44 and the heating element 45 respectively through the fan shaft 49; the dust-proof and oil-absorbing net 46, the first temperature and humidity sensor 47, and the second temperature and humidity sensor 48 of the temperature control module 4 are fixedly connected to the corresponding mounting holes on the contact cover 32 respectively.

[0042] The temperature control module 4 is installed above the contact cover 32 of the self-cleaning module 3 through the temperature control module support frame 41, and its first temperature and humidity sensor 47 and second temperature and humidity sensor 48 are installed below the contact cover 32 to collect temperature and humidity data of the local space area of ​​the dynamic contact group 6 and the static contact group 7; when the temperature and humidity data collected by the first temperature and humidity sensor 47 and the second temperature and humidity sensor 48 are close to the condensation conditions of the dynamic contact group 6 and the static contact group 7, the indoor monitoring host 1 sends a temperature control instruction to the outdoor controller 2, and the outdoor controller 2 turns on the power of the fan 44 and the heating element 45, and the fan shaft 49 is installed inside Micromotor 410, the rotor of micromotor 410 drives the fan 44 to rotate, and the stator of the micromotor is fixed to the heating element 45; when the heating element 45 generates heat and heats the surrounding air, the fan 44 rotates to drive the hot air downward through the dust-proof oil absorption net 46 on the contact cover 32 to flow to the local space area of ​​the moving contact group 6 and the static contact group 7. When the temperature rises, the moisture content of the air increases, and the data collected by the first temperature and humidity sensor 47 and the first temperature and humidity sensor 48 do not constitute condensation conditions. The indoor monitoring host 1 turns off the power of the fan 44 and the heating element 45 to the outdoor controller 2, and the fan 44 and the heating element 45 stop working.

[0043] like Figure 6 As shown, the contact resistance detection module 5 includes: a first Hall voltage / current sensor 51, a second Hall voltage / current sensor 52, a third Hall voltage / current sensor 53, a fourth Hall voltage / current sensor 54, a fifth Hall voltage / current sensor 55, and a sixth Hall voltage / current sensor 56; the first Hall voltage / current sensor 51 of the contact resistance detection module 5 is connected to the first contact post 61 via a cable; the first contact post 61 is connected to the first static contact piece 71 via a bolt; the first static contact piece 71 is in contact with the first moving contact 81; the second Hall voltage / current sensor 52 is connected to the second contact post 62 via a cable; the second contact post 62 is connected to the second static contact piece 72 via a bolt; the second static contact piece 72 is in contact with the first moving contact 81;

[0044] Similarly, the third Hall voltage / current sensor 53 is connected to the third contact column 63 through cables in sequence; the third contact column 63 is connected to the third static contact piece 73 through bolts; the third static contact piece 73 is in contact with the second moving contact 82; the fourth Hall voltage / current sensor 54 is connected to the fourth contact column 64 through cables in sequence; the fourth contact column 64 is connected to the fourth static contact piece 74 through bolts; the fourth static contact piece 74 is in contact with the second moving contact 82; the fifth Hall voltage / current sensor 55 is connected to the fifth contact column 65 through cables in sequence; the fifth contact column 65 is connected to the fifth static contact piece 75 through bolts; the fifth static contact piece 75 is in contact with the third moving contact 83; the sixth Hall voltage / current sensor 56 is connected to the sixth contact column 66 through cables in sequence; the sixth contact column 66 is connected to the sixth static contact piece 76 through bolts; the sixth static contact piece 76 is in contact with the third moving contact 83.

[0045] like Figure 6As shown, the contact resistance detection module 5 is fixed to the contact base 9 by bolts, and six Hall voltage / current sensors are installed on the contact resistance detection module 5, namely the first Hall voltage / current sensor 51, the second Hall voltage / current sensor 52, the third Hall voltage / current sensor 53, the fourth Hall voltage / current sensor 54, the fifth Hall voltage / current sensor 55, and the sixth Hall voltage / current sensor 56; the current of the first circuit flows through the first Hall voltage / current sensor 51 (non-contact) through the wire, and then flows through the third Hall voltage / current sensor 56. The first contact post 61, the first static contact piece 71, the first movable contact ring 81, the second static contact piece 72, the second contact post 62, and then flows through the second Hall voltage / current sensor 52 (non-contact) through the wire and flows out; the current of the second circuit flows through the third Hall voltage / current sensor 53 (non-contact) through the wire, and then passes through the third contact post 63, the third static contact piece 73, the second movable contact ring 82, the fourth static contact piece 74, the fourth contact post 64, and then flows through the fourth Hall voltage / current sensor 54 (non-contact) through the wire and flows out; the third circuit The current flows through the fifth Hall voltage / current sensor 55 (non-contact) through the wire, and then flows through the fifth contact column 65, the fifth static contact piece 75, the third movable contact ring 83, the sixth static contact piece 76, the sixth contact column 66, and then flows through the sixth Hall voltage / current sensor 56 (non-contact) through the wire and flows out; the contact resistance detection module 5 calculates the ratio of the voltage difference and current of the first Hall voltage / current sensor 51 and the second Hall voltage / current sensor 52 to obtain the contact resistance value R1, the third Hall voltage / current sensor 53 The ratio of the voltage difference of the fourth Hall voltage / current sensor 54 to the current is used to obtain the contact resistance value R2, and the ratio of the voltage difference of the fifth Hall voltage / current sensor 55 and the sixth Hall voltage / current sensor 56 to the current is used to obtain the contact resistance value R3. Finally, the data of the contact resistances R1, R2, and R3 are transmitted to the indoor monitoring host 1 through the external controller 2 for real-time monitoring; when the values ​​of the contact resistances R1, R2, and R3 exceed the warning values, the indoor monitoring host 1 issues an alarm to remind the maintenance personnel that the contact resistances need manual maintenance.

[0046] like Figure 7 、 Figure 8 、 Figure 9As shown, when the switch contacts are switched, the moving contact group 8 disconnects the left static contact piece and passes through the intermediate state and finally contacts with the right static contact group 7; when the moving contact group 8 reaches the intermediate position, since the gaps between the side brush 37 and the first center brush head 3510, the side brush 39 and the second center brush head 3512, and the first center brush head 3510 and the second center brush head 3512 are smaller than the diameter of the moving contact group 8, the moving contact ring 8 contacts the first side brush 37, the first center brush head 3510, the second center brush head 3512, and the second side brush 39 of the self-cleaning device 35 and the first side brush mounting block 36 during movement, and the brush heads sweep away and remove foreign matter such as wear particles, dust, and oil stains in the contact area between the moving contact group 8 and the static contact group 7, and at the same time rotate the moving contact group 8 to a certain angle to ensure uniform wear; when the moving contact group 8 passes the brush head, the first center of the self-cleaning device 35 The bristles of the center brush head 3510 and the second center brush head 3512 vibrate, and at this time the cleaning liquid 355 in the upper layer of the cleaning liquid storage tank 352 of the self-cleaning device 35 flows downward into the slow permeation layer 356 of the storage tank, and then flows into the slow permeation layer 358 of the column through the upper permeation hole 357 of the hollow support column 351, and finally the cleaning liquid 355 flows into the first center brush head 3510 and the second center brush head 3512 through the first lower permeation hole 359 and the second lower permeation hole 3511 at the bottom of the hollow support column 351, respectively, to prepare for cleaning the oil stains on the contact ring when the next switch motorized contact group 8 operates; when a liquid level sensor 3513 floats on the cleaning liquid 355 and detects that the liquid level of the cleaning liquid 35 drops to a certain value, the liquid level sensor 3513 sends an alarm to the indoor monitoring host 1 through the outdoor controller 2 to prompt maintenance, requesting manual replenishment of the cleaning liquid 355.

[0047] Reference Figure 7 As shown, the workflow and steps of the present invention are as follows:

[0048] In the first step, the indoor monitoring host 1 receives the data information sent by the outdoor controller 2 in real time and draws a real-time curve on the real page for maintenance personnel to access and view;

[0049] In the second step, the indoor controller 2 polls the number, status and real-time data of the switch machine self-cleaning module 3, and determines whether the switch machine needs maintenance through the warning line;

[0050] (2a) When the indoor controller 2 determines that the liquid level of the cleaning fluid 355 of the self-cleaning module 3 is reduced, the indoor controller 2 issues a maintenance alarm to the maintenance personnel to replenish the cleaning fluid 355 of the self-cleaning module 3;

[0051] (2b) When the indoor controller 2 determines that the liquid level data of the cleaning fluid 355 of the self-cleaning module 3 is abnormal, the indoor controller 2 sends a self-cleaning module 3 fault maintenance alarm to the maintenance personnel;

[0052] In the third step, the switch motorized contact group 8 disconnects the left static contact and sweeps the brush head of the self-cleaning device 35 in the middle of the rotation. The brush head removes foreign matter in the contact area between the dynamic contact ring and the static contact piece, and wipes the oil stains on the dynamic contact ring.

[0053] In the fourth step, the vibration of the brush head causes the cleaning liquid 355 to flow out of the cleaning liquid storage tank 352 along the slow permeation layer and reattach to the brush head, waiting for the next cleaning;

[0054] Step 5: When the temperature and humidity in the contact cover area monitored by the temperature control module 4 in real time approach condensation conditions, the indoor monitoring host 1 sends a command to the outdoor controller 2 to start the temperature control program, turn on the power of the heating element 45 and the fan 44, and blow hot air into the contact area to increase the ambient temperature and prevent condensation at the contact;

[0055] Step 6: When the temperature rises, the moisture content of the air increases, and the data collected by the temperature and humidity sensor does not constitute condensation conditions, the indoor monitoring host 1 sends a temperature control instruction to the outdoor controller 2. The outdoor controller 2 turns off the power of the fan and the heating element, and the fan 44 and the heating element 45 stop working;

[0056] In the seventh step, the contact resistance detection module detects the contact voltage and current values ​​through three pairs of Hall voltage / current sensors, calculates the contact resistance value, and then transmits the detection data to the indoor monitoring host 1 through the outdoor controller 2;

[0057] In the eighth step, when the value of the contact resistance exceeds the warning value or is abnormal, the indoor monitoring host 1 issues an alarm to prompt the maintenance personnel that the contact resistance needs manual maintenance.

[0058] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A railway switch contact cover, characterized by comprising: A self-cleaning module (3), a temperature control module (4), a contact resistance detection module (5), a contact column group (6), a static contact group (7), a dynamic contact group (8), and a contact seat (9); the self-cleaning module (3) comprises: a contact cover mounting bolt (31), a contact cover shell (32), a sealing gasket (33), and a first self-cleaning unit (35); the contact cover mounting bolt (31) of the self-cleaning module (3) fixes the contact cover shell (32), the sealing gasket (33), and the temperature control module support frame (41) of the temperature control module (4) to the contact seat (9); the contact column group (6) is connected to the static contact group (7) by bolts; the static The contact group (7) is in contact with the moving contact group (8); the temperature control module (4) is installed above the contact cover (32) of the self-cleaning module (3) through the temperature control module support frame (41); the first self-cleaning unit (35) comprises: a hollow support column (351), a cleaning liquid storage tank (352), a cleaning liquid storage tank cover (353), a self-cleaning unit mounting nut (354), a cleaning liquid (355), a storage tank slow permeation layer (356), an upper permeation hole (357), a column slow permeation layer (358), a lower permeation hole (359), a first central brush head (3510), and a second central brush head (3512). ; The hollow supporting column (351) of the first self-cleaning unit (35) in the self-cleaning module (3) presses the cleaning liquid storage tank (352) with the cleaning liquid storage tank cover (353) onto the contact cover (32) through the self-cleaning unit mounting nut (354); the lower end of the hollow supporting column (351) of the first self-cleaning unit (35) is a square cavity, and the two sides are respectively connected to the first central brush head (3510) and the second central brush head (3512) through the first lower permeation hole (359); the cleaning liquid storage tank (352) has two layers, the upper end is the cleaning liquid (355), and the lower end is the storage tank slow permeation layer (356); the storage The tank slow permeation layer (356) is connected to the column slow permeation layer (358) through the upper permeation hole (357) of the hollow support column (351); the lower end of the hollow support column (351) of the first self-cleaning unit (35) is a square cavity with a first central brush head (3510) and a second central brush head (3512) installed on both sides; a liquid level sensor (3513) floats on the cleaning liquid (355); the first side brush (37) is fixedly connected to the left side wall of the contact cover (32) through the first side brush mounting block (36); the second side brush (39) is fixedly connected to the right side wall of the contact cover (32) through the second side brush mounting block (38);The temperature control module (4) comprises: a temperature control module support frame (41), a first temperature control unit (42), a second temperature control unit (43), a fan (44), a heating element (45), a dust-proof oil absorption net (46), a first temperature and humidity sensor (47), a second temperature and humidity sensor (48), a fan shaft (49), and a micro motor (410). The temperature control module support frame (41) of the temperature control module (4) is fixedly connected to the first temperature control unit (42) and the second temperature control unit (43); the first temperature control unit (42) is connected to the fan (44) and the heating element (45) via the fan shaft (49); the temperature control module The dust-proof oil-absorbing net (46), the first temperature and humidity sensor (47), and the second temperature and humidity sensor (48) of the (4) are fixedly connected to the corresponding mounting holes on the contact cover (32); the temperature control module support frame (41) of the temperature control module (4) is fixedly connected to the first temperature control unit (42) and the second temperature control unit (43); the first temperature control unit (42) is connected to the fan (44) and the heating element (45) through the fan shaft (49); the dust-proof oil-absorbing net (46), the first temperature and humidity sensor (47), and the second temperature and humidity sensor (48) of the temperature control module (4) are fixedly connected to the corresponding mounting holes on the contact cover (32); The contact resistance detection module (5) comprises: a first Hall voltage / current sensor (51), a second Hall voltage / current sensor (52), a third Hall voltage / current sensor (53), a fourth Hall voltage / current sensor (54), a fifth Hall voltage / current sensor (55), and a sixth Hall voltage / current sensor (56); the first Hall voltage / current sensor (51) of the contact resistance detection module (5) is connected to the first contact column (61) through a cable; the first contact column (61) is connected to the first static contact piece (71) through a bolt; the first static contact piece (71) is in contact with the first moving contact ring (81); the second Hall voltage / current sensor (52) is connected to the second contact column (62) through a cable; the second contact column (62) is connected to the second static contact piece (72) through a bolt; the second static contact piece (72) is in contact with the first moving contact ring (81); the third Hall voltage / current sensor (53) is connected to the first contact column (62) through a cable in sequence; The third contact post (63) is connected to the third static contact piece (73) by a bolt; the third static contact piece (73) is in contact with the second moving contact ring (82); the fourth Hall voltage / current sensor (54) is connected to the fourth contact post (64) in turn by a cable; the fourth contact post (64) is connected to the fourth static contact piece (74) by a bolt; the fourth static contact piece (74) is in contact with the second moving contact ring (82); the fifth Hall voltage / current sensor (55) is sequentially connected to the fifth contact column (65) through a cable; the fifth contact column (65) is connected to the fifth static contact piece (75) through a bolt; the fifth static contact piece (75) is in contact with the third moving contact ring (83); the sixth Hall voltage / current sensor (56) is sequentially connected to the sixth contact column (66) through a cable; the sixth contact column (66) is connected to the sixth static contact piece (76) through a bolt; the sixth static contact piece (76) is in contact with the third moving contact ring (83).

2. A railway switch contact cover according to claim 1, characterized in that: The first temperature and humidity sensor (47) and the second temperature and humidity sensor (48) are installed below the contact cover (32) to collect temperature and humidity data of the local spatial area of ​​the moving contact group (8) and the static contact group (7).

3. The railway switch contact cover according to claim 1, characterized in that: When the temperature and humidity data collected by the first temperature and humidity sensor (47) and the second temperature and humidity sensor (48) are close to the condensation conditions of the dynamic contact group (8) and the static contact group (7), the indoor monitoring host (1) sends a temperature control instruction to the outdoor controller (2), and the outdoor controller (2) turns on the power of the fan (44) and the heating element (45). A micro motor (410) is installed inside the fan shaft (49), and the rotor of the micro motor (410) drives the fan (44) to rotate. The stator of the micro motor (410) is fixed to the heating element (45). When the heating element (45) generates heat and heats the surrounding air, the fan (44) rotates and drives the hot air downward through the dustproof oil absorption net (46) on the contact cover (32) to flow to the local space area of ​​the moving contact group (8) and the static contact group (7). When the temperature rises, the moisture content of the air increases, and the data collected by the first temperature and humidity sensor (47) and the second temperature and humidity sensor (48) do not constitute condensation conditions. The indoor monitoring host (1) turns off the power of the fan (44) and the heating element (45) to the outdoor controller (2).

4. The railway switch contact cover according to claim 1, characterized in that: The contact resistance detection module (5) is fixed to the contact seat (9) by bolts. Six Hall voltage / current sensors are installed on the contact resistance detection module (5), namely, a first Hall voltage / current sensor (51), a second Hall voltage / current sensor (52), a third Hall voltage / current sensor (53), a fourth Hall voltage / current sensor (54), a fifth Hall voltage / current sensor (55), and a sixth Hall voltage / current sensor (56); the current of the first circuit flows through the first Hall voltage / current sensor (51) through the wire, and then passes through the first contact column (61), the first static contact piece (71), the first moving contact ring (81), the second static contact piece (72), the second contact column (62), and then passes through the first Hall voltage / current sensor (51). The current of the second circuit flows through the second Hall voltage / current sensor (52) through the wire and flows out; the current of the second circuit flows through the third Hall voltage / current sensor (53) through the wire, then flows through the third contact post (63), the third static contact piece (73), the second movable contact ring (82), the fourth static contact piece (74), the fourth contact post (64), and then flows through the fourth Hall voltage / current sensor (54) through the wire and flows out; the current of the third circuit flows through the fifth Hall voltage / current sensor (55) through the wire, then flows through the fifth contact post (65), the fifth static contact piece (75), the third movable contact ring (83), the sixth static contact piece (76), the sixth contact post (66), and then flows through the sixth Hall voltage / current sensor (56) through the wire and flows out; The contact resistance detection module (5) calculates the ratio of the voltage difference between the first Hall voltage / current sensor (51) and the second Hall voltage / current sensor (52) to the current to obtain the contact resistance value R1, the ratio of the voltage difference between the third Hall voltage / current sensor (53) and the fourth Hall voltage / current sensor (54) to the current to obtain the contact resistance value R2, and the ratio of the voltage difference between the fifth Hall voltage / current sensor (55) and the sixth Hall voltage / current sensor (56) to the current to obtain the contact resistance value R3. Finally, the data of the contact resistances R1, R2, and R3 are transmitted to the indoor monitoring host (1) through the external controller (2) for real-time monitoring. When the values ​​of the contact resistances R1, R2, and R3 exceed the warning value, the indoor monitoring host (1) issues an alarm to inform the maintenance personnel that the contact resistances need manual maintenance.

5. A method for operating a railway switch contact cover, characterized by: include: Indoor monitoring host (1), outdoor controller (2), self-cleaning module (3), temperature control module (4), contact resistance detection module (5), liquid level acquisition module (10); the indoor monitoring host (1) is connected to the outdoor controller (2) via a network to issue power supply instructions and monitor the operation of the outdoor controller (2); the cleaning liquid (355) level acquisition module (10) of the self-cleaning module (3) is connected to the outdoor controller (2) and the indoor monitoring host (1) via a network respectively; the temperature and humidity sensor of the temperature control module (4) is connected to the outdoor controller (2) via a network, and the outdoor controller (2) is connected to the indoor monitoring host (1) via a network to collect, transmit and monitor temperature and humidity data; when the temperature and humidity conditions reach condensation conditions, the indoor monitoring host (1) sends a temperature adjustment instruction to the temperature control module via the outdoor controller (2); The contact resistance detection module (5) is connected to the outdoor controller (2) and the indoor monitoring host (1) through the network to detect, collect, transmit and monitor the voltage and current of all contacts of the switch machine: The working method of the switch machine contact cover specifically includes the following steps: In the first step, the indoor monitoring host (1) receives the data information sent by the outdoor controller (2) in real time and draws a real-time curve on the real page for maintenance personnel to read and view; In the second step, the outdoor controller (2) polls the number, status and real-time data of the switch machine self-cleaning module (3) and determines whether the switch machine needs maintenance through the warning line; (2a) When the outdoor controller (2) determines that the level of the cleaning fluid in the self-cleaning module (3) is reduced, the outdoor controller (2) issues a maintenance alarm to the maintenance personnel to replenish the cleaning fluid in the self-cleaning module (3); (2b) When the outdoor controller (2) determines that the cleaning fluid level data of the self-cleaning module (3) is abnormal, the outdoor controller (2) issues a self-cleaning module (3) fault maintenance alarm to the maintenance personnel; In the third step, the switch motorized contact group (8) disconnects the left static contact and sweeps the brush head of the first self-cleaning unit (35) in the middle state of rotation, and the brush head removes foreign matter in the contact area between the moving contact ring and the static contact piece, and wipes the oil stains on the moving contact ring at the same time; In the fourth step, the vibration of the brush head causes the cleaning liquid to flow out of the cleaning liquid storage tank (352) along the slow permeation layer and reattach to the brush head, waiting for the next cleaning; In the fifth step, when the temperature and humidity in the contact cover area monitored by the temperature control module (4) in real time are close to the condensation condition, the indoor monitoring host (1) sends a command to the outdoor controller (2) to start the temperature control program, turn on the heating element and the fan power, blow hot air into the contact area, increase the ambient temperature and prevent condensation at the contact; Step 6: When the temperature rises, the moisture content of the air increases, and the data collected by the temperature and humidity sensor does not constitute a condensation condition, the indoor monitoring host (1) sends a temperature control instruction to the outdoor controller (2), and the outdoor controller (2) turns off the power of the fan (44) and the heating element (45), and the fan (44) and the heating element (45) stop working; In the seventh step, the contact resistance detection module detects the contact voltage and current values ​​through three pairs of Hall voltage / current sensors, obtains the contact resistance value through calculation, and then transmits the detection data to the indoor monitoring host (1) through the outdoor controller (2); In the eighth step, when the value of the contact resistance exceeds the warning value or is abnormal, the indoor monitoring host (1) issues an alarm to inform the maintenance personnel that the contact resistance needs manual maintenance.

6. The method for operating a railway switch contact cover according to claim 5, characterized in that: The third step of the specific steps of the working method of the switch machine contact cover includes the following process: when the switch machine contact is switched, the moving contact group (8) disconnects the left static contact piece and passes through the intermediate state and finally contacts the right static contact group (7); when the moving contact group (8) reaches the intermediate position, since the gaps between the first side brush (37) and the first center brush head (3510), the gaps between the second side brush (39) and the second center brush head (3512), and the gaps between the first center brush head (3510) and the second center brush head (3512) are smaller than the gaps between the moving contact group (8). The diameter of the point group (8), the moving contact ring contacts the first side brush (37), the first center brush head (3510), the second center brush head (3512), and the second side brush (39) of the first self-cleaning unit (35) and the first side brush mounting block (36) during the movement, and the brush head sweeps away foreign matter such as wear particles, dust, and oil stains in the contact area between the moving contact group (8) and the static contact group (7), and at the same time rotates the moving contact group (8) to a certain angle to ensure uniform wear; when the moving contact group (8) passes the brush head, the first self-cleaning unit ( The bristles of the first central brush head (3510) and the second central brush head (3512) of the self-cleaning unit (35) vibrate, and the cleaning liquid (355) in the upper layer of the cleaning liquid storage tank (352) of the first self-cleaning unit (35) flows downward into the slow permeation layer (356) of the storage tank, and then flows into the slow permeation layer (358) of the column through the upper permeation hole (357) of the hollow support column (351). Finally, the cleaning liquid (355) passes through the first lower permeation hole (359) and the second lower permeation hole at the bottom of the hollow support column (351). (3511) flows into the first central brush head (3510) and the second central brush head (3512), preparing to clean the oil stains on the contact ring when the switch motorized contact group (8) is actuated next time; when the liquid level sensor (3513) floating on the cleaning liquid (355) detects that the liquid level of the cleaning liquid (355) drops to a certain value, the liquid level sensor (3513) sends an alarm to the outdoor controller (2) and the indoor monitoring host (1) through the liquid level acquisition module (10) to prompt maintenance and request manual replenishment of the cleaning liquid (355).

7. The method for operating a railway switch contact cover according to claim 5, wherein: The working method of the switch machine contact cover has the following specific steps: the indoor monitoring host (1) in the sixth step sends a temperature control instruction to the outdoor controller (2), including the following process: the outdoor controller (2) turns on the power of the fan (44) and the heating element (45), a micro motor (410) is installed inside the fan shaft (49), the rotor of the micro motor (410) drives the fan (44) to rotate, and the stator of the micro motor (410) is fixed to the heating element (45); when the heating element (45) heats up and heats the surrounding air, the fan (44) rotates to drive the fan (44) to rotate. The hot air flows downward through the dustproof oil absorption net (46) on the contact cover (32) to the local space area of ​​the moving contact group (8) and the static contact group (7). When the temperature rises, the moisture content of the air increases. The data collected by the first temperature and humidity sensor (47) and the second temperature and humidity sensor (48) do not constitute condensation conditions. The indoor monitoring host (1) sends a temperature control instruction to the outdoor controller (2). The outdoor controller (2) turns off the power of the fan (44) and the heating element (45), and the fan (44) and the heating element (45) stop working.

Images