A control system and method for locomotive pantograph recharging

Abstract

The application discloses a control system for locomotive pantograph-closing air supply, which comprises a pantograph-closing control pipeline connected with a locomotive main air cylinder, wherein the pantograph-closing control pipeline comprises an auxiliary compressor unit, a pantograph-closing air cylinder and a locomotive main air cylinder pressure sensor which are arranged in parallel in sequence, the output end of the locomotive main air cylinder is connected with the locomotive main air cylinder pressure sensor, the pantograph-closing control pipeline further comprises a pressure switch 1KP and a pressure switch 2KP which are arranged in parallel, the pressure switch 1KP and the pressure switch 2KP are redundant to each other for increasing the judgment input of the pantograph-closing pressure condition, and the judgment of whether the pantograph-closing pressure meets the demand in combination with the real-time pressure value of the locomotive main air cylinder is used to optimize the start air blowing control logic of the auxiliary compressor unit; and the application further provides a control method for locomotive pantograph-closing air supply. According to the application, a redundant pressure switch is added in the pantograph-closing pipeline, and the real-time pressure value of the locomotive main air cylinder is combined to optimize the judgment condition of the pantograph-closing air supply and the start air blowing logic of the auxiliary compressor.

Description

Technical Field

[0001] This application relates to the field of rail transit braking technology, and in particular to a control system and method for air supply during locomotive pantograph raising. Background Technology

[0002] One of the conditions for raising the pantograph on existing locomotives is that the air supply pressure for raising the pantograph must be sufficient (the specific value depends on the pantograph model of the specific project). In the pipeline, this corresponds to no air request from the auxiliary air compressor for raising the pantograph (triggered by a pressure switch signal on the air supply pipe). In actual operation, due to the instability of the pressure switch on the air supply pipe, its setting value drifts, or even the pressure switch is damaged, causing it to continuously trigger a signal. Consequently, the pantograph raising condition cannot be met, preventing the pantograph from raising and thus the locomotive from being put into operation. Furthermore, the continuous output of air request from the auxiliary air compressor causes the auxiliary compressor to continuously pump air. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a control system and method for air supply by raising the pantograph of a locomotive. The present invention optimizes the judgment conditions for air supply by raising the pantograph and the start-up logic of the auxiliary compressor by adding a redundant pressure switch to the pantograph pipeline and combining it with the real-time pressure value of the locomotive's main air cylinder.

[0004] The technical solution provided by this invention is as follows:

[0005] A control system for pantograph air supply in a locomotive includes a pantograph control pipeline connected to the locomotive's main air reservoir. The pantograph control pipeline includes an auxiliary compressor unit, a pantograph air reservoir, and a pressure sensor for the locomotive's main air reservoir, all connected in parallel. The output end of the locomotive's main air reservoir is connected to the pressure sensor. The pantograph control pipeline also includes pressure switches 1KP and 2KP connected in parallel. Pressure switches 1KP and 2KP are redundant and used to increase the input for determining the pantograph pressure condition. Combined with the real-time pressure value of the locomotive's main air reservoir, the system determines whether the pantograph pressure meets the requirements, thereby optimizing the start-up air supply control logic of the auxiliary compressor unit.

[0006] Preferably, the pressure switch 1KP and pressure switch 2KP are of the same model, and the opening and closing pressure range of pressure switch 1KP and pressure switch 2KP is a to b, wherein the pressure values ​​of a and b can be set according to actual needs.

[0007] Preferably, a pressure gauge is provided on the output pipeline of the lifting cylinder.

[0008] Preferably, the output pipe of the bow lifting control line is equipped with a shut-off valve.

[0009] Preferably, a one-way valve is provided on the parallel pipeline between the lifting air cylinder and the locomotive main air cylinder pressure sensor.

[0010] A control method for locomotive pantograph-based air supply, employing the aforementioned locomotive pantograph-based air supply control system, includes the following operational steps:

[0011] S1. When a pantograph raising command is triggered, if the real-time pressure value c of the locomotive's main air cylinder is greater than or equal to the pantograph raising air circuit pressure requirement value d: the locomotive control system CCU determines whether the pantograph raising control pipeline pressure value meets the requirement based on the combination of the auxiliary pressure unit air request signals from pressure switch 1KP and pressure switch 2KP, combined with the real-time pressure value c of the locomotive's main air cylinder, and outputs whether to start the auxiliary pressure unit air request command. At the same time, it determines and records the status of pressure switch 1KP and pressure switch 2KP.

[0012] S2. When a pantograph raising command is triggered, if the real-time pressure value c of the locomotive's main air cylinder is less than the required pressure value d of the pantograph raising air circuit: the locomotive control system CCU determines whether the pressure value of the pantograph raising control pipeline meets the requirements based on the combination of the auxiliary pressure unit air request signals from pressure switch 1KP and pressure switch 2KP, and outputs a command to start the auxiliary pressure unit air supply. At the same time, it determines and records the status of pressure switch 1KP and pressure switch 2KP.

[0013] Preferably, the specific determination process in step S1 is as follows:

[0014] The auxiliary compressor unit air request signal combination of pressure switch 1KP and pressure switch 2KP includes four cases: 00, 01, 10, and 11. Among them, 0 indicates that pressure switch 1KP or pressure switch 2KP has no air request signal, and 1 indicates that pressure switch 1KP or pressure switch 2KP has an air request signal.

[0015] 00 signal combination: It is determined that the air supply pipeline for raising the arch meets the conditions for raising the arch, and the pressure switch 1KP and pressure switch 2KP are both in normal condition. The auxiliary pressure unit is not started.

[0016] 01 Signal Combination: If the air supply pipeline for raising the bow meets the conditions for raising the bow, pressure switch 1KP is in normal condition, pressure switch 2KP is faulty, and the auxiliary pressure unit will not be started.

[0017] 10 signal combination: If the air supply pipeline for raising the arch meets the conditions for raising the arch, pressure switch 1KP is in normal condition, pressure switch 2KP is faulty, and the auxiliary pressure unit will not be started.

[0018] 11 signal combination: It is determined that the air supply pipeline for raising the arch does not meet the conditions for raising the arch. Both pressure switch 1KP and pressure switch 2KP are in normal condition, and the auxiliary pressure unit is started.

[0019] Preferably, the specific determination process in step S2 is as follows:

[0020] The auxiliary compressor unit air request signal combination of pressure switch 1KP and pressure switch 2KP includes four cases: 00, 01, 10, and 11. Among them, 0 indicates that pressure switch 1KP or pressure switch 2KP has no air request signal, and 1 indicates that pressure switch 1KP or pressure switch 2KP has an air request signal.

[0021] 00 signal combination: It is determined that the air supply pipeline for raising the arch meets the conditions for raising the arch, and the pressure switch 1KP and pressure switch 2KP are both in normal condition. The auxiliary pressure unit is not started.

[0022] 01 Signal Combination: Includes two scenarios: ① If the pressure in the air supply pipeline of the lifting pantograph is determined to be insufficient for lifting the pantograph based on the output pressure of the lifting pantograph cylinder, then pressure switch 1KP is faulty, pressure switch 2KP is normal, and the auxiliary pressure unit is started; ② If the pressure in the air supply pipeline of the lifting pantograph is determined to be sufficient for lifting the pantograph based on the output pressure of the lifting pantograph cylinder, then pressure switch 2KP is faulty, pressure switch 1KP is normal, and the auxiliary pressure unit is not started.

[0023] 10 signal combinations: including two situations: ① Based on the output pressure of the lifting cylinder, if it is manually determined that the pressure of the lifting air supply pipeline does not meet the lifting conditions, then pressure switch 2KP is faulty, pressure switch 1KP is normal, and the auxiliary pressure unit is started; ② Based on the output pressure of the lifting cylinder, if it is manually determined that the pressure of the lifting air supply pipeline meets the lifting conditions, then pressure switch 1KP is faulty, pressure switch 2KP is normal, and the auxiliary pressure unit is not started.

[0024] 11 signal combination: It is determined that the air supply pipeline for raising the pantograph meets the conditions for raising the pantograph, the pressure switch 1KP and pressure switch 2KP are both in normal state, and the auxiliary pressure unit is started. At the same time, it is determined that the air supply pipeline from the locomotive main air cylinder to the pantograph is blocked, resulting in the air passage being blocked.

[0025] Preferably, when the auxiliary compressor unit air request signal of pressure switch 1KP and pressure switch 2KP are combined, if pressure switch 1KP or pressure switch 2KP is determined to be faulty, the locomotive control system CCU will record the fault and provide maintenance prompts.

[0026] This application has the following advantages over the prior art:

[0027] The locomotive pantograph air supply control system and method of this application, through the setting of pressure switches 1KP and 2KP, with pressure switches 2KP and 1KP being redundant, uses their output signal combination as the judgment criterion. The probability of both pressure switches failing simultaneously is very small. Therefore, in this scheme, it is considered that when the output signals of the two pressure switches are consistent, it reflects the actual state of the air pressure in the pantograph air supply pipeline. In summary, the locomotive pantograph air supply control system of this invention adds a redundant pressure switch to the existing locomotive pantograph control pipeline, and optimizes the judgment method of locomotive pantograph air supply conditions and the start / stop control logic of the auxiliary compressor by combining the real-time pressure value of the locomotive's main air cylinder. This solves the problems of the instability of the signal of the single pressure switch in the existing locomotive, which leads to its setting value drift, or even pressure switch failure, causing it to continuously trigger signals, thus preventing the pantograph from being raised and the locomotive from being put into operation, and continuously outputting air requests to the auxiliary air compressor for pantograph raising, causing the auxiliary compressor to continuously pump air. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the control system for locomotive pantograph air supply in an embodiment of the present invention;

[0030] Figure 2 This is a control flowchart of the control method for air supply to the gas storage vehicle via pantograph in an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Pantograph lifting control pipeline; 2. Auxiliary pressure unit; 3. Pantograph lifting air cylinder; 4. Locomotive main air cylinder pressure sensor; 5. Pressure switch 1KP; 6. Pressure switch 2KP; 7. Pressure gauge; 8. Shut-off valve; 9. Check valve. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figure 1As shown, this embodiment of the invention provides a control system for the pantograph air supply of a locomotive, including a pantograph control pipeline 1 connected to the locomotive's main air cylinder. The pantograph control pipeline 1 includes an auxiliary pressure unit 2, a pantograph air cylinder 3, and a locomotive main air cylinder pressure sensor 4, which are connected in parallel. The output end of the locomotive main air cylinder is connected to the locomotive main air cylinder pressure sensor 4. The pantograph control pipeline 1 also includes a pressure switch 1KP5 and a pressure switch 2KP6 connected in parallel. The pressure switches 1KP5 and 2KP6 are redundant and are used to increase the input for judging the pantograph pressure condition. They are combined with the real-time pressure value of the locomotive main air cylinder to determine whether the pantograph pressure meets the requirements, thereby optimizing the start-up air supply control logic of the auxiliary pressure unit 2.

[0035] In this embodiment, pressure switch 1KP5 and pressure switch 2KP6 are of the same model. The opening and closing pressure range of pressure switch 1KP5 and pressure switch 2KP6 are both a to b, where the pressure values ​​of a and b can be set according to actual needs.

[0036] In this embodiment, a pressure gauge 7 is installed on the output pipeline of the lifting cylinder 3. A shut-off valve 8 is installed on the output pipeline of the lifting control pipeline 1. A one-way valve 9 is installed on the parallel pipeline between the lifting cylinder 3 and the locomotive main cylinder pressure sensor 4.

[0037] like Figure 2 As shown, a control method for locomotive pantograph air supply employs the aforementioned locomotive pantograph air supply control system and includes the following operating steps:

[0038] S1. When a pantograph raising command is triggered, if the real-time pressure value c of the locomotive's main air cylinder is greater than or equal to the pantograph raising air circuit pressure requirement value d: the locomotive control system CCU determines whether the pressure value of the pantograph raising control pipeline 1 meets the requirement based on the combination of the auxiliary pressure unit 2 air request signal from pressure switch 1KP5 and pressure switch 2KP6, combined with the real-time pressure value c of the locomotive's main air cylinder, and outputs whether to start the auxiliary pressure unit 2 air request command. At the same time, it determines and records the status of pressure switch 1KP5 and pressure switch 2KP6.

[0039] S2. When a pantograph raising command is triggered, if the real-time pressure value c of the locomotive's main air cylinder is less than the required pressure value d of the pantograph raising air circuit: the locomotive control system CCU determines whether the pressure value of the pantograph raising control pipeline 1 meets the requirements based on the combination of the auxiliary pressure unit 2 air request signals from pressure switch 1KP5 and pressure switch 2KP6, and outputs a command to start the auxiliary pressure unit 2 air circuit. At the same time, it determines and records the status of pressure switch 1KP5 and pressure switch 2KP6.

[0040] In this embodiment, the specific determination process in step S1 is as follows:

[0041] The auxiliary compressor unit air request signal combinations for pressure switch 1KP5 and pressure switch 2KP6 include four possibilities: 00, 01, 10, and 11. Where 0 indicates that either pressure switch 1KP6 or pressure switch 2KP6 has no air request signal, and 1 indicates that either pressure switch 1KP5 or pressure switch 2KP6 has an air request signal. The specific determinations are shown in Table 1 below:

[0042] Table 1. Criteria for determining when the real-time pressure value c of the locomotive's main air cylinder is greater than or equal to the pressure demand value d of the lifting air circuit.

[0043]

[0044] In this embodiment, the specific determination process in step S2 is as follows:

[0045] The auxiliary compressor unit 2's air request signal combination for pressure switch 1KP5 and pressure switch 2KP6 includes four possibilities: 00, 01, 10, and 11. Where 0 indicates that neither pressure switch 1KP5 nor pressure switch 2KP6 has an air request signal, and 1 indicates that either pressure switch 1KP5 or pressure switch 2KP6 has an air request signal. The specific determination is shown in Table 2 below:

[0046] Table 2. Criteria for determining when the real-time pressure value c of the locomotive's main air cylinder is less than the required pressure value d of the lifting air circuit.

[0047]

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of controlling the supply of air to a pantograph of a locomotive, characterized by, The control system for locomotive pantograph air supply control is used for control, and the control system for locomotive pantograph air supply control comprises a pantograph control pipeline (1) connected with a locomotive main air cylinder, the pantograph control pipeline comprises an auxiliary pressure unit (2), a pantograph air cylinder (3) and a locomotive main air cylinder pressure sensor (4) which are sequentially and parallelly arranged, the output end of the locomotive main air cylinder is connected with the locomotive main air cylinder pressure sensor (4), the pantograph control pipeline (1) further comprises pressure switch 1KP (5) and pressure switch 2KP (6) which are parallelly arranged, the pressure switch 1KP (5) and the pressure switch 2KP (6) are redundant to each other for increasing the judgment input of the condition of increasing the pantograph pressure and combining the real-time pressure value of the locomotive main air cylinder to judge whether the pantograph pressure meets the demand to optimize the starting and air blowing control logic of the auxiliary pressure unit (2), and the specific control method comprises the following operation steps: S1, when there is a pantograph command triggering, if the real-time pressure value c of the locomotive main air cylinder is greater than or equal to the pantograph air path pressure demand value d: the locomotive control system CCU combines the auxiliary pressure unit (2) air blowing request signal of the pressure switch 1KP (5) and the pressure switch 2KP (6), combines the real-time pressure value c of the locomotive main air cylinder, judges whether the pressure value of the pantograph control pipeline (1) meets the demand, and outputs whether the auxiliary pressure unit (2) air blowing command is started, and judges and records the state of the pressure switch 1KP (5) and the pressure switch 2KP (6) at the same time; S2, when there is a pantograph command triggering, if the real-time pressure value c of the locomotive main air cylinder is less than the pantograph air path pressure demand value d: the locomotive control system CCU combines the auxiliary pressure unit (2) air blowing request signal of the pressure switch 1KP (5) and the pressure switch 2KP (6), judges whether the pressure value of the pantograph control pipeline (1) meets the demand, and outputs whether the auxiliary pressure unit (2) air blowing command is started, and judges and records the state of the pressure switch 1KP (5) and the pressure switch 2KP (6) at the same time, and the specific judgment process is as follows: The auxiliary pressure unit air blowing request signal combination of the pressure switch 1KP (5) and the pressure switch 2KP (6) includes four situations of 00, 01, 10 and 11, wherein 0 represents that the pressure switch 1KP (5) or the pressure switch 2KP (6) has no air blowing request signal, and 1 represents that the pressure switch 1KP (5) or the pressure switch 2KP (6) has an air blowing request signal; 00 signal combination: it is judged that the pantograph air supply pipeline (1) meets the pantograph condition, the states of the pressure switch 1KP (5) and the pressure switch 2KP (6) are normal, and the auxiliary pressure unit (2) is not started; 01 signal combination: it includes two situations: ① combining the output pressure of the pantograph air cylinder (3), it is artificially judged that the pantograph air supply pipeline (1) pressure does not meet the pantograph condition, then the pressure switch 1KP (5) is faulty, the pressure switch 2KP (6) is normal, and the auxiliary pressure unit (2) is started; ② combining the output pressure of the pantograph air cylinder (3), it is artificially judged that the pantograph air supply pipeline (1) pressure meets the pantograph condition, then the pressure switch 2KP (6) is faulty, the pressure switch 1KP (5) is normal, and the auxiliary pressure unit (2) is not started; 10 signal combination: including two cases: 1, combined with the output pressure of the arch raising air cylinder (3), artificially determine that the pressure of the arch raising air supply pipeline (1) does not meet the arch raising condition, then the pressure switch 2KP (6) is faulty, the pressure switch 1KP (5) is normal, and the auxiliary pressure unit (2) is started; 2, combined with the output pressure of the arch raising air cylinder (3), artificially determine that the pressure of the arch raising air supply pipeline (1) meets the arch raising condition, then the pressure switch 1KP (5) is faulty, the pressure switch 2KP (6) is normal, and the auxiliary pressure unit (2) is not started; 11 signal combination: determine that the arch raising air supply pipeline (1) meets the arch raising condition, the pressure switch 1KP (5) and the pressure switch 2KP (6) are both normal, and the auxiliary pressure unit (2) is started, and it is determined that the total air cylinder of the locomotive is blocked to the arch raising pipeline, causing the air path to be blocked.

2. The control method of locomotive bow current supply according to claim 1, characterized by, The specific determination process in step S1 is as follows: The auxiliary pressure unit (2) of the pressure switch 1KP (5) and the pressure switch 2KP (6) includes four cases of 00, 01, 10 and 11, wherein 0 represents no wind request signal of the pressure switch 1KP (5) or the pressure switch 2KP (6), and 1 represents the wind request signal of the pressure switch 1KP (5) or the pressure switch 2KP (6); 00 signal combination: determine that the arch raising air supply pipeline meets the arch raising condition, the pressure switch 1KP (5) and the pressure switch 2KP (6) are both normal, and the auxiliary pressure unit is not started; 01 signal combination: determine that the arch raising air supply pipeline (1) meets the arch raising condition, the pressure switch 1KP (5) is normal, the pressure switch 2KP (6) is faulty, and the auxiliary pressure unit (2) is not started; 10 signal combination: determine that the arch raising air supply pipeline (1) meets the arch raising condition, the pressure switch 2KP (5) is normal, the pressure switch 1KP (6) is faulty, and the auxiliary pressure unit (2) is not started; 11 signal combination: determine that the arch raising air supply pipeline (1) does not meet the arch raising condition, the pressure switch 1KP (5) and the pressure switch 2KP (6) are both normal, and the auxiliary pressure unit (2) is started.

3. The control method of locomotive bow current supply according to claim 1 or 2, characterized by, When the auxiliary pressure unit (2) of the pressure switch 1KP (5) and the pressure switch 2KP (6) is faulty, the locomotive control system CCU records the fault condition and gives a maintenance prompt.

4. The control method of locomotive bowser air supply according to claim 1, characterized in that, The pressure switch 1KP (5) and the pressure switch 2KP (6) are of the same type, and the opening and closing pressure range of the pressure switch 1KP (5) and the pressure switch 2KP (6) is a~b, wherein the pressure values of a and b can be set according to actual needs.

5. The control method of locomotive bowser air supply according to claim 1, wherein, A pressure gauge (7) is arranged on the output pipeline of the arch raising air cylinder (3).

6. The locomotive bowser-fed air supply control system as recited in claim 1, wherein, A cutoff plug valve (8) is arranged on the output pipeline of the arch raising control pipeline (1).

7. The control method of locomotive bowser air supply according to claim 1, wherein, A one-way valve (9) is arranged on the parallel pipeline between the arch raising air cylinder (3) and the locomotive total air cylinder pressure sensor (4).

Images