A pantograph interlocking control device and control method for rail transit maintenance

Abstract

The application discloses a pantograph interlocking control device and control method for track traffic maintenance, which comprises an interlocking mechanism, an interlocking sliding block, a first switch, a second switch and a pilot double control electromagnetic valve, the pilot double control electromagnetic valve is arranged on a high-pressure air path of a locomotive, and the first switch and the second switch are respectively used for controlling the power-on state of the two ends of the pilot double control electromagnetic valve; the interlocking mechanism comprises a panel and two interlocking holes arranged on the panel, the locking tongues in the two interlocking holes are connected with the interlocking sliding block, and any locking tongue is rotated to drive the interlocking sliding block to slide horizontally, and then the interlocking sliding block synchronously drives the other locking tongue to rotate, the interlocking sliding block is provided with a first trigger sliding block and a second trigger sliding block, and the first trigger sliding block and the second trigger sliding block are respectively used for triggering the first switch and the second switch. The application can realize the interlocking protection function of the lifting of the pantograph of the track locomotive, and has the characteristics of simple operation and long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic control elements, in particular to a pantograph interlocking control device for rail transit maintenance and a control method. BACKGROUND

[0002] In order to avoid safety accidents of maintenance personnel, the pantograph must be lowered and the grounding switch must be grounded before the maintenance and repair work of related equipment can be carried out when the rail locomotive is in the depot for maintenance. Therefore, the commonly used guarantee method on the rail transit system is to set a high-voltage interlocking key box to ensure that the pantograph lowering operation is completed before the grounding switch key is taken out, and the key of the protection box of other equipment on the vehicle can be taken out after the grounding switch is operated by using the key. As a high-voltage interlocking key box to ensure that the pantograph is interlocked, its function is to form interlocking with the driver's key, reliably cut off the air path of the pantograph cylinder, and set conditions for the next level key to be taken out. In order to realize this function, the existing interlocking key box needs multiple steps of operation, that is, first unlock the key box with the driver's key, then rotate the stop valve handle to cut off the air path and release the grounding switch key, then rotate the grounding switch key and take it out to operate the next level grounding switch. The above operation method has too many steps and greatly increases the risk of misoperation by maintenance personnel. At present, there is no interlocking key box that can directly use the driver's key to realize the function through one-step operation and has high reliability and long service life. SUMMARY

[0003] In order to solve the above problems in the prior art, the present application provides a pantograph interlocking control device for rail transit maintenance and a control method.

[0004] The present application discloses a pantograph interlocking control device for rail transit maintenance, which comprises an interlocking mechanism, an interlocking slide block, a first switch, a second switch and a pilot-operated double-control electromagnetic valve. The pilot-operated double-control electromagnetic valve is arranged on the high-pressure air path of the locomotive, and the first switch and the second switch are used to control the power-on state of the two ends of the pilot-operated double-control electromagnetic valve.

[0005] The interlocking mechanism comprises a panel and two interlocking holes arranged on the panel, and the locking tongues in the two interlocking holes are connected with the interlocking slide block. When any one of the locking tongues rotates, it drives the interlocking slide block to slide horizontally, and in turn, the interlocking slide block drives the other locking tongue to rotate. The interlocking slide block is provided with a first trigger slide block and a second trigger slide block, which are used to trigger the first switch and the second switch, respectively.

[0006] Preferably, two rows of guide columns are arranged on the panel, and the interlocking slide block is arranged between the two rows of guide columns.

[0007] Preferably, a first sliding slot is formed at the same height of the guide column, and the interlocking sliding block is slidingly arranged in the first sliding slot.

[0008] Preferably, a text sliding block is further arranged, a window is formed on the panel for displaying the text on the text sliding block, the text sliding block is fixedly connected with the interlocking sliding block, and the text sliding block is arranged between the two columns of guide columns.

[0009] Preferably, a second sliding slot is formed at the same height of the guide column, the second sliding slot is located at a different height from the first sliding slot, and the text sliding block is slidingly arranged in the second sliding slot.

[0010] Preferably, time relays are arranged on both ends of the pilot-operated double-control electromagnetic valve.

[0011] Preferably, the first switch comprises a first micro switch and a third micro switch which are synchronously triggered, the second switch comprises a second micro switch and a fourth micro switch which are synchronously triggered, the first micro switch and the second micro switch are used for controlling the on-off of the main circuit of the locomotive, and the third micro switch and the fourth micro switch are respectively used for controlling the power-on state of both ends of the pilot-operated double-control electromagnetic valve.

[0012] Preferably, one of the interlocking holes in the interlocking mechanism is matched with the locomotive key.

[0013] The application further provides a control method of the pantograph interlocking control device for rail transit maintenance.

[0014] When the locomotive is running, the locomotive key is inserted into the main control room of the locomotive.

[0015] In this state, the interlocking mechanism is locked, and the first micro switch and the third micro switch are triggered by the first trigger sliding block, that is, the first micro switch makes the signal terminal connected, the main circuit of the locomotive is powered on, the third micro switch makes one end of the pilot-operated double-control electromagnetic valve powered on, the high-pressure air path of the locomotive is connected, and the air path of the pantograph of the locomotive is in normal operation.

[0016] After a period of time, the time relay cuts off the power supply of one end of the pilot-operated double-control electromagnetic valve, and the pilot-operated double-control electromagnetic valve remains in the previous state.

[0017] When the locomotive is overhauled, the locomotive is parked, the locomotive key is pulled out and inserted into the interlocking mechanism.

[0018] The locomotive key is rotated, the interlocking sliding block is horizontally slid along with the rotation of the locomotive key, and the interlocking sliding block synchronously drives the key in the other interlocking hole to rotate and release the key, and after the key is taken out, the state is locked.

[0019] At the same time, the interlocking slider horizontally slides to make the first trigger slider away from the first micro switch and the third micro switch, the second trigger slider triggers the second micro switch and the fourth micro switch, that is, the second micro switch makes the signal terminal disconnected, the main circuit of the locomotive is powered off, the fourth micro switch makes the other end of the pilot double control electromagnetic valve powered on, so that the high pressure air circuit of the locomotive is disconnected, and the pantograph is lowered.

[0020] After a period of time, the time relay cuts off the power supply of the other end of the pilot double control electromagnetic valve, and the pilot double control electromagnetic valve remains in the disconnected state.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application ingeniously utilizes the electrical control principle and fully combines the interlocking mechanism design, and only one step of rotating the lock operation can realize the pantograph lowering and key interlocking functions, perfectly solves the reliability and functionality requirements of the track locomotive, and also takes into account the characteristics of low operating torque, simple use, clear indication and long service life, meets the requirements of simplifying the operation steps and improving the safety and reliability of the modern rail transit system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a back structure schematic view of the pantograph interlocking control device for track traffic maintenance of the present application;

[0024] Figure 2 It is a structure schematic view of the interlocking slider in the pantograph interlocking control device for track traffic maintenance of the present application;

[0025] Figure 3 It is a front view of the panel in the pantograph interlocking control device for track traffic maintenance of the present application;

[0026] Figure 4 It is a circuit principle diagram of the pantograph interlocking control device for track traffic maintenance of the present application;

[0027] Figure 5 It is a gas circuit principle diagram of the pantograph interlocking control device for track traffic maintenance of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] The application will be further described in detail below with reference to the accompanying drawings:

[0030] With reference to Figure 1 The application provides a pantograph interlocking control device for rail transit maintenance, which comprises an interlocking mechanism, an interlocking sliding block 6, a first switch, a second switch and a pilot double-control electromagnetic valve 16. The pilot double-control electromagnetic valve 16 is arranged on a high-pressure air path of a locomotive, and the first switch and the second switch are respectively used for controlling the power-on state of the two ends of the pilot double-control electromagnetic valve 16.

[0031] The interlocking mechanism comprises a panel 1 and two interlocking holes arranged on the panel 1. The locking tongues in the two interlocking holes are connected with the interlocking sliding block 6, and any locking tongue is rotated to drive the interlocking sliding block 6 to slide horizontally, and then the interlocking sliding block 6 synchronously drives the other locking tongue to rotate. The interlocking sliding block 6 is provided with a first trigger sliding block 10 and a second trigger sliding block 11, which are respectively used for triggering the first switch and the second switch.

[0032] Specifically, one interlocking hole 7 in the interlocking mechanism is matched with a locomotive key, and the other interlocking hole 8 is matched with a grounding switch key 9. Through the above structure, the locomotive key and the grounding switch key 9 are formed into an interlocking function through the interlocking mechanism, and the power-on state of the two ends of the pilot double-control electromagnetic valve 16 is controlled through the interlocking sliding block 6, thereby controlling the on-off state of the high-pressure air path of the locomotive. The interlocking sliding block 6 is controlled by the locomotive key and the grounding switch key 9, so that only the operation of rotating the locomotive key can realize the interlocking function of the locomotive key, the pantograph lowering and the grounding switch key 9, which is more simple and fast compared with the previous multi-step operation.

[0033] In the embodiment, the interlocking sliding block 6, the first switch, the second switch and the pilot double-control electromagnetic valve 16 are fixedly arranged on the rear side of the panel 1, and can be fixed on the locomotive through the mounting holes at the four corners of the panel 1.

[0034] With reference to Figure 2 Two rows of guide columns are arranged on the panel 1, and the interlocking sliding block 6 is arranged between the two rows of guide columns. In order to limit the upward movement of the interlocking sliding block 6, a stopper is fixed at the top end of the relative guide column. The application also limits the horizontal movement of the interlocking sliding block 6 through the guide column, and can also be limited through a slide and other ways.

[0035] Further, a first sliding groove is arranged at the same height of the guide column, and the interlocking sliding block 6 is arranged in the first sliding groove.

[0036] With reference to Figure 3Also included is a letter slider 4, which has the letters ON and OFF on it to show the status at the time. A window 5 is provided on the panel 1 to show the letters on the letter slider 4. The letter slider 4 is fixedly connected to the interlocking slider 6, and the letter slider 4 is also disposed between the two columns of guide posts. The letter slider 4 can be at the same level as the interlocking slider 6, or at a different level.

[0037] Further, a second sliding groove is provided at the same height as the guide posts, and the second sliding groove is at a different height than the first sliding groove. The letter slider 4 is slidingly disposed in the second sliding groove. This arrangement saves space compared to the letter slider 4 being at the same level as the interlocking slider 6, and the same outside bending of the letter slider 4 and the interlocking slider 6 is more secure through bolt connection.

[0038] Still further, the length of the letter slider 4 is less than the length of the interlocking slider, so that second sliding grooves are not provided in all of the guide posts, but only in the guide posts used in the travel of the letter slider 4. Therefore, there are two types of guide posts in the present application, which are the first guide posts 2 and the second guide posts 3, as shown in Figure 2 In the present embodiment, there are four first guide posts 2 and four second guide posts 3, with the four first guide posts 2 arranged two by two on the right side of the panel 1, and the four second guide posts 3 arranged two by two on the left side of the panel 1.

[0039] Continuing to refer to Figure 2 , the first switch includes the first micro switch 12 and the third micro switch 14 that are triggered synchronously, and the second switch includes the second micro switch 13 and the fourth micro switch 15 that are triggered synchronously. The first micro switch 12 and the second micro switch 13 are used to control the on-off of the main circuit of the locomotive, and the third micro switch 14 and the fourth micro switch 15 are respectively used to control the power supply state of the pilot-operated double-control electromagnetic valve 16.

[0040] Further, a time relay 18 is provided on the circuit at both ends of the pilot-operated double-control electromagnetic valve 16.

[0041] In the present embodiment, the electrical principle of the device is as shown in Figure 4As shown, KT1 and KT2 in the figure respectively represent two time relays 18, SQL1 and SQL2 respectively represent two ends of the pilot double control electromagnetic valve 16, SQ1, SQ2, SQ3 and SQ4 respectively represent the first micro switch 12, the second micro switch 13, the third micro switch 14 and the fourth micro switch 15. In order to supply power to the pilot double control electromagnetic valve 16, a cable fixing head 19 is also provided on the panel 1, which is connected with an external power supply, and the connection circuit of the cable fixing head 19 is circuit 1 and circuit 2 in the figure. In order to better show the on-off of the locomotive main circuit, circuits 3 and 4 and circuits 5 and 6 in the figure are both locomotive main circuit diagrams, which are connected to the normally open contact and the normally closed contact of the two micro switches according to the requirements of the locomotive system.

[0042] Referring to Figure 5 In order to connect the pilot double control electromagnetic valve with the high-pressure gas circuit of the locomotive, a gas circuit connector 17 is also provided on the panel 1, which is connected with the high-pressure gas circuit of the locomotive, and when the SQL1 end of the pilot double control electromagnetic valve 16 is powered, the inlet and outlet ports are connected in communication, and the high-pressure gas circuit of the locomotive is connected; when the SQL2 end is powered, the gas circuit is switched and the inlet and outlet ports are cut off.

[0043] The control method of the present application comprises:

[0044] When the locomotive is in operation, the locomotive key is inserted into the main control room of the locomotive, that is, there is no key in the interlocking hole matched with the locomotive key, and the interlocking mechanism is locked and cannot be actuated;

[0045] In this state, the text slider 4 displays "ON" in the window 5, the first micro switch 12 and the third micro switch 14 are triggered by the first trigger slider 10, that is, the first micro switch 12 makes the signal terminal connected, the locomotive main circuit is powered on, the third micro switch 14 makes one end SQL1 of the pilot double control electromagnetic valve 16 powered on, and the high-pressure gas circuit of the locomotive is connected, that is, the inlet and outlet ports of the pilot double control electromagnetic valve 16 are connected in communication, and the locomotive pantograph gas circuit operates normally;

[0046] After a period of time, the time relay 18 cuts off the power supply of one end SQL1 of the pilot double control electromagnetic valve 16, and the pilot double control electromagnetic valve 16 remains in the previous state, and the grounding switch key 9 cannot be rotated and pulled out during this process;

[0047] When the locomotive is under repair, the locomotive is parked and the locomotive key is pulled out and inserted into the interlocking mechanism;

[0048] When the locomotive key is rotated, the interlocking slide 6 slides horizontally with the rotation of the locomotive key, so that the first trigger slide 10 is away from the first micro switch 12 and the third micro switch 14, and the second trigger slide 11 triggers the second micro switch 13 and the fourth micro switch 15, i.e. the second micro switch 13 disconnects the signal terminal, the main circuit of the locomotive is powered off, the locomotive cab can no longer control the locomotive parts, and double protection is provided for the pantograph lowering interlock, and the fourth micro switch 15 energizes the other end SQL2 of the pilot-operated double-control electromagnetic valve 16, so that the high-pressure air circuit of the locomotive is disconnected, i.e. the inlet and outlet air ports of the pilot-operated double-control electromagnetic valve 16 are cut off, the pantograph cylinder is connected with the atmosphere, and the pantograph is lowered.

[0049] After a period of time, the time relay 18 cuts off the power supply of the other end SQL2 of the pilot-operated double-control electromagnetic valve 16, and the pilot-operated double-control electromagnetic valve 16 remains in the disconnected state.

[0050] At the same time, the interlocking slide 6 synchronously drives the key rotation in the other interlocking hole and releases the key, at this time the window 5 displays “OFF”, reminding the maintenance personnel to take away the grounding switch key 9, and after losing the key, the key is locked and cannot be actuated, and at the same time, it is ensured that the pantograph is also in the current locked state.

[0051] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pantograph interlocking control device for rail transit maintenance, characterized by, The interlocking mechanism, the interlocking slider, the first switch, the second switch and the pilot-operated double control electromagnetic valve are arranged on the high-pressure gas circuit of the locomotive, and the first switch and the second switch are used for controlling the power supply state of the pilot-operated double control electromagnetic valve. The interlocking mechanism comprises a panel and two interlocking holes arranged on the panel, and the locking tongues in the two interlocking holes are connected with the interlocking slider, and any one of the locking tongues is rotated to drive the interlocking slider to slide horizontally, and then the interlocking slider synchronously drives the other locking tongue to rotate. The pilot-operated double control electromagnetic valve is provided with time relays on the circuit at both ends, the first switch comprises synchronously triggered first and third micro switches, the second switch comprises synchronously triggered second and fourth micro switches, and the first and second micro switches are used for controlling the on-off of the main circuit of the locomotive, and the third and fourth micro switches are used for controlling the power supply state of the pilot-operated double control electromagnetic valve.

2. The pantograph interlock control device for rail transit maintenance according to claim 1, characterized in that, The panel is provided with two columns of guide columns, and the interlocking slider is arranged between the two columns of guide columns.

3. The pantograph interlock control device for rail transit maintenance according to claim 2, characterized in that, A first sliding groove is arranged at the same height of the guide columns, and the interlocking slider is arranged in the first sliding groove.

4. The pantograph interlock control device for rail transit maintenance according to claim 3, characterized in that, The panel is provided with a window for displaying the text on the text slider, the text slider is fixedly connected with the interlocking slider, and the text slider is also arranged between the two columns of guide columns.

5. The pantograph interlock control device for rail transit maintenance according to claim 4, characterized in that, A second sliding groove is arranged at the same height of the guide columns, and the second sliding groove is arranged at a different height from the first sliding groove, and the text slider is arranged in the second sliding groove.

6. The pantograph interlock control device for rail transit maintenance according to claim 1, characterized in that, One of the interlocking holes in the interlocking mechanism is matched with the locomotive key.

7. A control method of the catenary-pantograph interlocking control device for rail transit maintenance according to claim 1, characterized in that, The locomotive key is inserted into the main control room of the locomotive when the locomotive is running. In this state, the interlocking mechanism is locked, the first and third micro switches are triggered by the first trigger slider, the first micro switch makes the signal terminal connected, the main circuit of the locomotive is powered on, the third micro switch makes one end of the pilot-operated double control electromagnetic valve powered on, the high-pressure gas circuit of the locomotive is connected, and the pantograph gas circuit of the locomotive operates normally. After a period of time, the time relay cuts off the power supply of one end of the pilot-operated double control electromagnetic valve, and the pilot-operated double control electromagnetic valve remains in the previous state. When the locomotive is overhauled, the locomotive is parked, the locomotive key is pulled out and inserted into the interlocking mechanism. The interlocking slider slides horizontally with the rotation of the locomotive key, and the interlocking slider synchronously drives the key in the other interlocking hole to rotate and release the key, and the key is taken out, and the state is locked. ​ At the same time, the interlocking slider horizontally slides to make the first trigger slider away from the first micro switch and the third micro switch, the second trigger slider triggers the second micro switch and the fourth micro switch, that is, the second micro switch makes the signal terminal disconnected, the main circuit of the locomotive is powered off, the fourth micro switch makes the other end of the pilot double control electromagnetic valve powered on, so that the high pressure gas circuit of the locomotive is disconnected, and the pantograph of the locomotive is lowered. After a period of time, the time relay cuts off the power supply of the other end of the pilot double control electromagnetic valve, and the pilot double control electromagnetic valve remains in the disconnected state.

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