CN113911147B - Locomotive and mechanical delay safety interlocking system and method - Google Patents
Locomotive and mechanical delay safety interlocking system and method Download PDFInfo
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- CN113911147B CN113911147B CN202111165556.2A CN202111165556A CN113911147B CN 113911147 B CN113911147 B CN 113911147B CN 202111165556 A CN202111165556 A CN 202111165556A CN 113911147 B CN113911147 B CN 113911147B
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- key
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- lock cylinder
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- cabinet door
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
- B61C17/04—Arrangement or disposition of driving cabins, footplates or engine rooms; Ventilation thereof
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B77/00—Vehicle locks characterised by special functions or purposes
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/38—Hinged covers or doors
Abstract
The invention discloses a locomotive and mechanical delay safety interlocking system and a method, comprising mechanical delay safety equipment; the mechanical delay safety device comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A and a key B; the key A is fixedly connected with a locomotive power supply key, and the key B is fixedly connected with a cabinet door key of the high-voltage electric screen cabinet; the interlocking logic module is used for only pulling out the key A or the key B in each operation; the time delay module is used for pulling out the key B after the time delay time is over when the key A is inserted into the first lock core; after the locomotive is powered off, a locomotive power supply key is pulled out, the key A is inserted into the first lock cylinder, due to the time delay function, the key B can be pulled out only after the time delay is finished, the capacitor equipment is continuously discharged by utilizing the time delay, the voltage in the high-voltage electric screen cabinet is reduced to the human body safe operation voltage, and the safety of an operator in operating the high-voltage electric screen cabinet is ensured.
Description
Technical Field
The invention belongs to the technical field of control among various devices of a locomotive, and particularly relates to a high-voltage electric screen cabinet safe operation delay interlocking system and method after the locomotive is powered off.
Background
In a high-voltage electrical system screen cabinet equipped for a locomotive, a capacitor device is generally arranged in a middle direct-current loop, and after the locomotive is powered off, the capacitor has unequal continuous discharge time of 5-8 minutes, so that the voltage grade in the electrical screen cabinet can be reduced to below the safe operating voltage of a human body (less than 36V).
For example, a capacitive device is installed in both the locomotive traction converter cabinet and the DCDC cabinet. According to EN50153-2014 clause 8.3.2, if there is a capacitive discharge element in the cabinet, it is necessary to drop the voltage in the cabinet below the safe voltage (60V) within a specified time to ensure the safety of the operator. Once the equipment cabinet which is not discharged to the safe voltage is operated, personal injury is easily caused to the operating personnel, and safety accidents are caused.
By analyzing related voltage safety protection schemes in recent years, most of high-voltage electrical cabinets with capacitance equipment are not subjected to voltage detection after power failure and effective safety protection is carried out. The existing safety interlocking scheme needs to be provided with a grounding switch, an interlocking key box and the like, so that the electrical and wiring workload and the complexity of field implementation are increased; the operation steps of the interlocking key box are complicated, at least more than 4 keys are needed to realize the safety interlocking function, and the interlocking key box occupies more available space of the locomotive and has higher cost.
Disclosure of Invention
The invention aims to provide a locomotive and mechanical delay safety interlocking system and method, which are used for solving the operation safety problem caused by the fact that a high-voltage electric screen cabinet provided with capacitance equipment is not discharged to a safety voltage range after the locomotive is powered off and the problems of complicated operation steps, large occupied space and high cost of the existing interlocking scheme.
The invention solves the technical problems through the following technical scheme: a mechanical time delay safety interlock system comprises a mechanical time delay safety device arranged in a cab; the mechanical delay safety equipment comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A matched with the first lock cylinder and a key B matched with the second lock cylinder; the key A is fixedly connected with a locomotive power supply key, and the key B is fixedly connected with a cabinet door key of the high-voltage electric screen cabinet; the interlocking logic module is used for only pulling out the key A from the first lock cylinder or pulling out the key B from the second lock cylinder in each operation; and the time delay module is used for enabling the key B to be pulled out of the second lock cylinder after the time delay time is over when the key A is inserted into the first lock cylinder.
In the invention, when the locomotive normally runs, a locomotive power supply key is needed, the key A is fixedly connected with the locomotive power supply key, and the key A is pulled out so as to use the locomotive power supply key to ensure the normal running of the locomotive; due to the interlocking logic function of the interlocking logic module, only one key can be pulled out of the mechanical delay safety equipment during each operation, so that the key B cannot be pulled out of the second lock cylinder, and the key B is fixedly connected with a cabinet door key of the high-voltage electric screen cabinet, so that the key B cannot be pulled out due to the interlocking logic function during normal operation of the locomotive, and the high-voltage electric screen cabinet cannot be operated; after the locomotive is powered off, a locomotive power supply key can be pulled out, the key A is inserted into the first lock cylinder, due to the time delay function of the time delay module, the key B can be pulled out from the second lock cylinder only after the time delay is finished, so that the high-voltage electric screen cabinet can be opened by using the cabinet door key, the capacitor equipment continuously discharges in the time delay after the locomotive is powered off, the voltage in the high-voltage electric screen cabinet is reduced to the human body safe operation voltage, and the safety of an operator in operating the high-voltage electric screen cabinet is ensured.
The system does not need to increase the workload of electric wiring and is easy to implement; the mechanical delay safety device is small in size, small in occupied space and low in cost, the safety interlocking function can be achieved only by two keys, the operation is simple, and the safety is high.
Furthermore, the high-voltage electric cubicle is a traction converter cubicle and/or a DCDC cubicle.
Furthermore, the fixed connection modes are all welding.
Further, the system also comprises a sensor for detecting the voltage of the capacitance equipment in the high-voltage electric screen cabinet and an electronic lock at a lock cylinder of a door of the high-voltage electric screen cabinet; the sensor and the electronic lock are both electrically connected with the controller; the electronic lock is used for being connected with the cabinet door lock core when the voltage of the capacitor equipment is greater than the safe operation voltage, so that the cabinet door cannot be opened.
Further, the system also includes an indicator light electrically connected to the controller; the indicator light is used for displaying red when the voltage of the capacitor equipment is greater than the safe operation voltage, and displaying green when the voltage of the capacitor equipment is less than or equal to the safe operation voltage.
The invention also provides a method for carrying out safety interlocking control by utilizing the mechanical delay safety interlocking system, which comprises the following steps:
step 1: the locomotive is powered off, and a locomotive power supply key is pulled out;
step 2: inserting a key A fixedly connected with the locomotive power supply key into a first lock cylinder;
and step 3: after the time delay is finished, pulling out the key B from the second lock cylinder;
and 4, step 4: and inserting a cabinet door key of the high-voltage electric screen cabinet fixedly connected with the key B into a cabinet door lock cylinder to open a cabinet door of the high-voltage electric screen cabinet.
Further, in the step 3, the delay time is 8min.
Further, after the step 3, the step 4 further includes:
detecting the voltage of capacitance equipment in the high-voltage electrical screen cabinet;
when the voltage of the capacitor equipment is greater than the safe operation voltage, the electronic lock is connected with the cabinet door lock core;
and when the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the electronic lock is not connected with the cabinet door lock core.
Further, after the step 3, the step 4 further includes:
and checking whether the indicator light is green, if so, turning to the step 4, otherwise, waiting for the indicator light to turn green.
The invention also provides a locomotive comprising the mechanical time delay safety interlock system.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. the locomotive power failure and the discharge of the high-voltage electric screen cabinet to a safe voltage range can be interlocked through the mechanical delay safety equipment, so that the safety of an operator in operating the high-voltage electric screen cabinet is ensured; the system and the method do not need to increase the workload of electric wiring and are easy to implement; the mechanical delay safety equipment has the advantages of small volume, small occupied space, low cost, simple operation and high safety, and the safety interlocking function can be realized only by two keys;
2. the electronic lock further ensures the safety of the operator when operating the high-voltage electric cabinet after the locomotive is powered off;
3. the indicating lamp further ensures the safety of the operator when operating the high-voltage electric screen cabinet after the locomotive is powered off, and forms triple protection with the electronic lock and the mechanical delay safety equipment, so that when the operator operates the high-voltage electric screen cabinet, the locomotive is powered off and the capacitance equipment in the high-voltage electric screen cabinet is discharged to a safe voltage range.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a block diagram of a mechanical time delay safety interlock system in accordance with embodiment 1 of the present invention;
FIG. 2 is a view showing a fixed connection between a key A and a power supply key of a motorcycle according to embodiment 1 of the present invention;
FIG. 3 is a view showing the fixed connection between a key B and a cabinet door key in embodiment 1 of the present invention;
fig. 4 is a flowchart of a safety interlock control method in embodiment 1 of the invention;
fig. 5 is a flowchart of a safety interlock control method in embodiment 2 of the invention.
The system comprises 1-mechanical delay safety equipment, 11-key A, 12-key B, 2-locomotive power supply key and 3-cabinet door key.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present application will be described in detail below with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Example 1
As shown in fig. 1, the mechanical delay safety interlock system provided in this embodiment includes a mechanical delay safety device 1 disposed in a cab; the mechanical delay safety device 1 comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A11 matched with the first lock cylinder and a key B12 matched with the second lock cylinder. The key A11 is fixedly connected with the locomotive power supply key 2, as shown in fig. 2, and the key B12 is fixedly connected with the cabinet door key 3 of the high-voltage electric screen cabinet, as shown in fig. 3.
An interlock logic module for extracting only the key a 11 from the first cylinder or the key B12 from the second cylinder at each operation, that is, the key B12 cannot be extracted from the second cylinder after the key a 11 is extracted from the first cylinder; or when the key B12 is pulled out from the second key cylinder, the key a 11 cannot be pulled out from the first key cylinder. And the time delay module is used for enabling the key B12 to be pulled out of the second lock cylinder after the time delay time is over when the key A11 is inserted into the first lock cylinder. In this embodiment, the delay time may be set according to a time required for the capacitor device to reduce the voltage in the high-voltage electrical cabinet to below the human body safe operating voltage through discharging.
Key A11 and key B12 are inserted respectively on first lock core and second lock core, because key A11 and locomotive power supply key 2 fixed connection, when locomotive normal operating need use locomotive power supply key 2, must extract key A11 from first lock core, just can insert locomotive power supply key 2 to the cab power supply key position, the locomotive normal operating, because interlocking logic function this moment, key B12 can't be extracted from the second lock core, can't open high-voltage electric screen cabinet, operating personnel can't maintain high-voltage electric screen cabinet, play effective safety protection to high-voltage electric screen cabinet when the locomotive does not cut off the power supply. When the high-voltage electric screen cabinet needs to be maintained after the locomotive is powered off, the locomotive power supply key 2 is pulled out to ensure that the locomotive is in a power-off state, the key A11 can be inserted into the first lock cylinder, due to the interlocking logic function and the time delay function, the key B12 can be pulled out from the second lock cylinder after the time delay is finished, and in the period from the power-off of the locomotive to the end of the time delay, the capacitor equipment in the high-voltage electric screen cabinet continuously discharges to enable the voltage of the high-voltage electric screen cabinet to be reduced below the safe operating voltage of a human body, then the cabinet door key 3 is inserted into the cabinet door lock cylinder, the cabinet door of the high-voltage electric screen cabinet is opened, the high-voltage electric screen cabinet is maintained, and the safety of an operator in operating the high-voltage electric screen cabinet is ensured.
The system can realize the interlocking control when the locomotive is powered off and the high-voltage electric screen cabinet discharges below the safe operating voltage only by the mechanical delay safety equipment 1, only uses the key A11 and the key B12, has simple operation and high safety, and not only ensures the operation safety when the locomotive is powered off, but also ensures the operation safety when the locomotive is not powered off. The mechanical delay safety device 1 occupies small space and has low cost.
In this embodiment, the high-voltage electrical cubicle is a traction converter cubicle and/or a DCDC cubicle. The means of fixed attachment includes, but is not limited to, welding.
Installing a voltage sensor on the capacitance equipment of the high-voltage electrical screen cabinet, wherein the voltage sensor is used for detecting the voltage of the capacitance equipment; an electronic lock is installed at a lock cylinder of a cabinet door of the high-voltage electric cabinet; an indicator light is arranged on the high-voltage electric screen cabinet; the voltage sensor, the electronic lock and the indicator lamp are electrically connected with the controller; the controller is used for acquiring the voltage of the capacitor equipment, judging whether the voltage of the capacitor equipment is less than or equal to the safe operation voltage, if so, controlling the electronic lock not to be connected with the cabinet door lock core, and the indicator light is green; otherwise, the electronic lock is controlled to be connected with the cabinet door lock core, and the indicator light is red.
When the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the maintenance operation can be performed on the high-voltage electric screen cabinet, the electronic lock is not connected with the cabinet door lock core, the cabinet door of the high-voltage electric screen cabinet can be opened through the cabinet door key 3, and the indication lamp indicates green; when the voltage of the capacitor equipment is greater than the safe operation voltage, the voltage is not reduced to be lower than the safe operation voltage, the high-voltage electric screen cabinet cannot be maintained, the electronic lock is connected with the cabinet door lock core, the cabinet door of the high-voltage electric screen cabinet cannot be opened through the cabinet door key 3, and the indication lamp is red. The safety of the high-voltage electric cabinet in operation is further ensured through the indicator lamp and the electronic lock.
As shown in fig. 4, this embodiment further provides a method for performing safety interlock control by using the mechanical delay safety interlock system according to embodiment 1, including the following steps:
step 1: and (5) the locomotive is powered off, and the locomotive power supply key 2 is pulled out.
Step 2: the key a 11, which is fixedly connected to the locomotive power supply key 2, is inserted into the first cylinder on the mechanical time delay security device 1, at which time the key B12 cannot be removed.
And step 3: and the time delay module starts to time, and after the time delay is finished, the key B12 is pulled out from the second lock cylinder. And in the delay time, the capacitance equipment of the high-voltage electric screen cabinet reduces the voltage level to be lower than the safe operating voltage of the human body through continuous discharge.
The delay time can be set according to the time required for the capacitor device to reduce the voltage in the high-voltage electrical cabinet below the human body safe operating voltage through discharging. In this embodiment, the delay time is 8min.
And 4, step 4: acquiring the voltage of capacitance equipment in the high-voltage electrical screen cabinet, and when the voltage of the capacitance equipment is greater than the safe operation voltage, connecting the electronic lock with a cabinet door lock core, wherein an indicator lamp is red; when the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the electronic lock is not connected with the cabinet door lock core, and the indicator light is green.
The voltage of the capacitor equipment is detected according to the sampling period of the sensor, and the detection of the voltage of the capacitor equipment is real-time and continuous, so that the acquisition of the voltage of the capacitor equipment and the judgment between the voltage of the capacitor equipment and the safe operation voltage are always carried out, but not carried out in the step 4, namely the acquisition of the voltage of the capacitor equipment, the judgment of the voltage of the capacitor equipment and the safe operation voltage, and the control of the electronic lock and the indicator lamp in the step 4 are not in sequence with the steps 1-3.
And 5: and (4) checking whether the indicator lamp on the high-voltage electric screen cabinet is green, if so, indicating that the voltage is reduced to be lower than the human body safe operation voltage, and turning to the step 6, otherwise, indicating that the voltage is not reduced to be lower than the human body safe operation voltage, and waiting for the indicator lamp to turn green.
When the voltage of the capacitor equipment is higher than the safe operation voltage, the indicator light is red, and the electronic lock is connected with the cabinet door lock core, so that the cabinet door cannot be opened even if a cabinet door key 3 is used; when the capacitor equipment voltage is less than or equal to the safe operation voltage, the indicating lamp is green, the electronic lock is not connected with the cabinet door lock core, and the cabinet door can be opened by the cabinet door key 3. The security of operation is guaranteed as last protective screen to the electronic lock, has avoided operating personnel to operate the security problem of high-voltage electric screen cabinet when the pilot lamp is red, even operating personnel operates high-voltage electric screen cabinet when the pilot lamp is red, also because the electronic lock can't open the cabinet door, has guaranteed the security. The indicator light can give more intuitive indication to the operator.
Step 6: inserting a cabinet door key 3 of the high-voltage electric screen cabinet fixedly connected with the key B12 into a cabinet door lock cylinder, screwing the cabinet door key 3, if the cabinet door key 3 can be screwed, the voltage is reduced to be lower than the human body safety operation voltage, the electronic lock is not connected with the cabinet door lock cylinder, and the cabinet door is opened to carry out maintenance operation on the high-voltage electric screen cabinet; if the electric power tool cannot be screwed, the voltage is not reduced below the safe operating voltage of the human body, the indicator light fails, and the failure is reported to relevant maintainers.
The pilot lamp is green and indicates that capacitive device voltage is less than or equal to safe operating voltage, and the electronic lock should not be connected with cabinet lock core, still can't open the cabinet door under the pilot lamp is green, explains that the pilot lamp is green to have the trouble, and the electronic lock guarantees that the protect function of operating security is effective as last protective screen.
Example 2
As shown in fig. 1, the mechanical delay safety interlock system provided in this embodiment includes a mechanical delay safety device 1 disposed in a cab; the mechanical delay safety device 1 comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A11 matched with the first lock cylinder and a key B12 matched with the second lock cylinder. The key A11 is fixedly connected with the locomotive power supply key 2, as shown in fig. 2, and the key B12 is fixedly connected with the cabinet door key 3 of the high-voltage electric screen cabinet, as shown in fig. 3.
An interlock logic module for extracting only the key a 11 from the first cylinder or the key B12 from the second cylinder at each operation, that is, the key B12 cannot be extracted from the second cylinder after the key a 11 is extracted from the first cylinder; or when the key B12 is pulled out from the second key cylinder, the key a 11 cannot be pulled out from the first key cylinder. And the time delay module is used for enabling the key B12 to be pulled out of the second lock cylinder after the time delay time is over when the key A11 is inserted into the first lock cylinder.
Installing a voltage sensor on the capacitance equipment of the high-voltage electrical screen cabinet, wherein the voltage sensor is used for detecting the voltage of the capacitance equipment; an electronic lock is installed at a lock cylinder of a cabinet door of the high-voltage electric cabinet; the voltage sensor and the electronic lock are both electrically connected with the controller; the controller is used for acquiring the voltage of the capacitor equipment, judging whether the voltage of the capacitor equipment is less than or equal to the safe operation voltage, and if so, controlling the electronic lock not to be connected with the cabinet door lock core; otherwise, the electronic lock is controlled to be connected with the cabinet door lock core.
As shown in fig. 5, this embodiment further provides a method for performing safety interlock control by using the mechanical delay safety interlock system according to embodiment 2, including the following steps:
step 1: and (5) the locomotive is powered off, and the locomotive power supply key 2 is pulled out.
Step 2: the key a 11, which is fixedly connected to the locomotive power supply key 2, is inserted into the first cylinder on the mechanical time delay security device 1, at which time the key B12 cannot be removed.
And step 3: and the time delay module starts to time, and after the time delay is finished, the key B12 is pulled out from the second lock cylinder. And in the delay time, the capacitance equipment of the high-voltage electric screen cabinet reduces the voltage level to be lower than the safe operating voltage of the human body through continuous discharge.
The delay time can be set according to the time required for the capacitor device to reduce the voltage in the high-voltage electrical cabinet below the human body safe operating voltage through discharging. In this embodiment, the delay time is 8min.
And 4, step 4: acquiring the voltage of capacitance equipment in the high-voltage electrical screen cabinet, and when the voltage of the capacitance equipment is greater than the safe operation voltage, connecting the electronic lock with a cabinet door lock core; when the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the electronic lock is not connected with the cabinet door lock core.
And 5: and inserting a cabinet door key 3 of the high-voltage electric screen cabinet fixedly connected with the key B12 into a cabinet door lock cylinder to open the cabinet door of the high-voltage electric screen cabinet.
If the voltage of the capacitor equipment is greater than the safe operation voltage, the electronic lock is connected with the lock core of the cabinet door, and the cabinet door of the high-voltage electric screen cabinet cannot be opened, so that the operation safety is ensured.
Example 3
As shown in fig. 1, the mechanical delay safety interlock system provided in this embodiment includes a mechanical delay safety device 1 disposed in a cab; the mechanical delay safety device 1 comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A11 matched with the first lock cylinder and a key B12 matched with the second lock cylinder. The key A11 is fixedly connected with the locomotive power supply key 2, as shown in fig. 2, and the key B12 is fixedly connected with the cabinet door key 3 of the high-voltage electric screen cabinet, as shown in fig. 3.
An interlock logic module for extracting only the key a 11 from the first cylinder or the key B12 from the second cylinder at each operation, that is, the key B12 cannot be extracted from the second cylinder after the key a 11 is extracted from the first cylinder; or when the key B12 is pulled out from the second key cylinder, the key a 11 cannot be pulled out from the first key cylinder. And the time delay module is used for enabling the key B12 to be pulled out of the second lock cylinder after the time delay time is over when the key A11 is inserted into the first lock cylinder.
Installing a voltage sensor on the capacitive equipment of the high-voltage electrical cabinet, wherein the voltage sensor is used for detecting the voltage of the capacitive equipment; an indicator lamp is arranged on the high-voltage electric screen cabinet; the voltage sensor and the indicator light are electrically connected with the controller; the controller is used for acquiring the voltage of the capacitor equipment, judging whether the voltage of the capacitor equipment is less than or equal to the safe operation voltage, and if so, turning the indicator light to green; otherwise the indicator light is red.
This embodiment also provides a method for performing safety interlock control using the mechanical delay safety interlock system according to embodiment 3, including the steps of:
step 1: and (5) the locomotive is powered off, and the locomotive power supply key 2 is pulled out.
Step 2: the key a 11, which is fixedly connected to the locomotive power supply key 2, is inserted into the first cylinder on the mechanical time delay security device 1, at which time the key B12 cannot be removed.
And step 3: and the time delay module starts to time, and after the time delay is finished, the key B12 is pulled out from the second lock cylinder. And in the delay time, the capacitance equipment of the high-voltage electric screen cabinet reduces the voltage level to be lower than the safe operating voltage of the human body through continuous discharge.
The delay time can be set according to the time required for the capacitor device to reduce the voltage in the high-voltage electrical cabinet below the human body safe operating voltage through discharging. In this embodiment, the delay time is 8min.
And 4, step 4: acquiring the voltage of capacitance equipment in the high-voltage electric screen cabinet, and when the voltage of the capacitance equipment is greater than the safe operation voltage, the indicator lamp is red; when the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the indicator light is green.
And 5: checking whether the indicator light is green, inserting a cabinet door key 3 of the high-voltage electrical screen cabinet fixedly connected with the key B12 into a cabinet door lock cylinder when the indicator light is green, and opening a cabinet door of the high-voltage electrical screen cabinet; when the indicator light is red, the waiting indicator light is changed into green, if the waiting time is less than or equal to the waiting time threshold value, the cabinet door is opened after the indicator light is changed into green, and if the waiting time is greater than the waiting time threshold value, a fault is reported.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (10)
1. A mechanical time delay safety interlock system characterized by: the safety device comprises mechanical delay safety equipment arranged in a cab; the mechanical delay safety device comprises an interlocking logic module, a delay module, a first lock cylinder, a second lock cylinder, a key A matched with the first lock cylinder and a key B matched with the second lock cylinder; the key A is fixedly connected with a locomotive power supply key, and the key B is fixedly connected with a cabinet door key of the high-voltage electric screen cabinet; the interlocking logic module is used for only extracting the key A from the first lock cylinder or extracting the key B from the second lock cylinder in each operation; and the time delay module is used for enabling the key B to be pulled out of the second lock cylinder after the time delay time is over when the key A is inserted into the first lock cylinder.
2. The mechanical time delay safety interlock system of claim 1, wherein: the high-voltage electric screen cabinet is a traction converter screen cabinet and/or a DCDC screen cabinet.
3. The mechanical time delay safety interlock system of claim 1, wherein: the fixed connection mode is welding.
4. The mechanical time delay safety interlock system of any one of claims 1 to 3, wherein: the high-voltage electric cabinet door lock also comprises a sensor for detecting the voltage of capacitance equipment in the high-voltage electric cabinet and an electronic lock at the lock cylinder of the high-voltage electric cabinet door; the sensor and the electronic lock are both electrically connected with the controller; and the electronic lock is used for being connected with the cabinet door lock core when the voltage of the capacitance equipment is greater than the safe operation voltage, so that the cabinet door cannot be opened.
5. The mechanical time delay safety interlock system of claim 4, wherein: the device also comprises an indicator light electrically connected with the controller; the indicator light is used for displaying red when the voltage of the capacitor equipment is greater than the safe operation voltage, and displaying green when the voltage of the capacitor equipment is less than or equal to the safe operation voltage.
6. A method of safety interlock control using a mechanical time delay safety interlock system as claimed in any one of claims 1 to 5, comprising the steps of:
step 1: the locomotive is powered off, and a locomotive power supply key is pulled out;
step 2: inserting a key A fixedly connected with the locomotive power supply key into a first lock cylinder;
and step 3: after the time delay is finished, pulling out the key B from the second lock cylinder;
and 4, step 4: and inserting a cabinet door key of the high-voltage electric screen cabinet fixedly connected with the key B into a cabinet door lock cylinder to open a cabinet door of the high-voltage electric screen cabinet.
7. The method of claim 6, wherein in step 3, the delay time is 8min.
8. The method of claim 6 or 7, wherein after step 3, step 4 is preceded by:
detecting the voltage of capacitance equipment in the high-voltage electrical screen cabinet;
when the voltage of the capacitor equipment is greater than the safe operation voltage, the electronic lock is connected with the cabinet door lock core;
and when the voltage of the capacitor equipment is less than or equal to the safe operation voltage, the electronic lock is not connected with the cabinet door lock core.
9. The method of claim 6 or 7, wherein after step 3, step 4 is preceded by:
and checking whether the indicator light is green, if so, turning to the step 4, otherwise, waiting for the indicator light to turn green.
10. A locomotive, characterized by: comprising a mechanical time delay safety interlock system as claimed in any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111165556.2A CN113911147B (en) | 2021-09-30 | 2021-09-30 | Locomotive and mechanical delay safety interlocking system and method |
| PCT/CN2022/121522 WO2023051481A1 (en) | 2021-09-30 | 2022-09-27 | Locomotive and mechanical delay safety interlock system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111165556.2A CN113911147B (en) | 2021-09-30 | 2021-09-30 | Locomotive and mechanical delay safety interlocking system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113911147A CN113911147A (en) | 2022-01-11 |
| CN113911147B true CN113911147B (en) | 2022-10-14 |
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| CN202111165556.2A Active CN113911147B (en) | 2021-09-30 | 2021-09-30 | Locomotive and mechanical delay safety interlocking system and method |
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| CN (1) | CN113911147B (en) |
| WO (1) | WO2023051481A1 (en) |
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| CN113911147B (en) * | 2021-09-30 | 2022-10-14 | 中车株洲电力机车有限公司 | Locomotive and mechanical delay safety interlocking system and method |
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| Publication number | Publication date |
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| WO2023051481A1 (en) | 2023-04-06 |
| CN113911147A (en) | 2022-01-11 |
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