CN214424678U - Control circuit of air compressor of rail locomotive - Google Patents
Control circuit of air compressor of rail locomotive Download PDFInfo
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- CN214424678U CN214424678U CN202120380138.4U CN202120380138U CN214424678U CN 214424678 U CN214424678 U CN 214424678U CN 202120380138 U CN202120380138 U CN 202120380138U CN 214424678 U CN214424678 U CN 214424678U
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Abstract
The utility model relates to a track locomotive air compressor machine control circuit, including PLC, first key switch relay, second key switch relay, first auxiliary relay, second auxiliary relay, third auxiliary relay and total wind pressure switch, first auxiliary relay include first group normally closed contact A, second group normally closed contact B and a set of normally open contact C, second auxiliary relay include first group normally closed contact D, second group normally closed contact E and a set of normally open contact F, second group normally closed contact E one end is connected with first auxiliary relay's second group normally closed contact B other end, the second group normally closed contact E other end is connected with PLC's X27 contact. The utility model has simple design, does not change the original circuit basically, and can still work by using the original circuit after the circuit is added; when the power key is turned off, the intermediate relay can output an air compressor unloading signal to the PLC, so that the hidden danger that the air compressor cannot be unloaded normally is eliminated, and the air compressor is more reasonable to start and stop.
Description
Technical Field
The utility model relates to a track locomotive's air compressor machine specifically is a track locomotive air compressor machine control circuit.
Background
The air compressor is a short name for an air compressor, and is mainly applied to braking and whistle on a railway locomotive. With the continuous progress of modern technology, the starting, running and closing of the air compressor on the rail locomotive are gradually automatically controlled.
In the existing rail locomotive, the start and stop of an air compressor are controlled by a key switch, a control circuit of the air compressor is shown in fig. 2, the air compressor unloads a PLC control signal sent by a main air pressure switch (entering a PLC input X46) and an automatic (entering a PLC input X26) and stop (entering a PLC input X27) change-over switch of the air compressor, the PLC judges according to logic, when Y22 outputs high voltage, an intermediate relay 18KD is powered on to act, and the air compressor unloads; and when the Y22 outputs low voltage, the intermediate relay 18KD does not act, and the air compressor is not unloaded. According to fig. 2, it can be seen that after the power key switch (1KS/2KS) is turned off, the relay 1KD/2KD is de-energized, the circuit controlled by the relay 1KD/2KD is disconnected from the power circuit 202, and the air compressor automatic input (X26) and the air compressor stop input (X27) have no signals, so that no unloading signal is output from the PLC regardless of the total air cylinder pressure, and therefore, when a driver turns off the key switch and the engine of the air compressor is not turned off, the air compressor cannot be unloaded, sometimes the air compressor is blown without stopping, so that the air compressor stores excessive pressure inside, and certain potential safety hazards are generated.
Disclosure of Invention
To the problem that exists among the background art, the utility model aims at providing a rail locomotive air compressor machine control circuit, through addding new interconnecting link, change relay's control mode, when the power key closed, relay still can export the air compressor machine uninstallation signal to PLC to eliminate the hidden danger that the air compressor machine can not normally be uninstalled, make opening of air compressor machine open more rationally.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a control circuit of an air compressor of a rail locomotive comprises a PLC, a first key switch relay, a second key switch relay, a first intermediate relay, a second intermediate relay, a third intermediate relay and a main wind pressure switch, wherein the input end of the first key switch relay is connected with a power supply, and the output end of the first key switch relay is respectively connected with the first intermediate relay and the second intermediate relay; the input end of the second key switch relay is connected with the power supply, and the output end of the second key switch relay is respectively connected with the first intermediate relay and the second intermediate relay; the first intermediate relay is respectively connected with an X26 contact and an X27 contact of the PLC, and the second intermediate relay is also respectively connected with an X26 contact and an X27 contact of the PLC; the main wind pressure switch is connected with an X46 contact of the PLC, one end of a third intermediate relay is connected with a Y22 contact of the PLC, and the other end of the third intermediate relay is connected with a starting motor for controlling the starting and stopping of the air compressor;
the first intermediate relay comprises a first group of normally closed contacts A, a second group of normally closed contacts B and a group of normally open contacts C, wherein the group of normally open contacts C is connected with an X26 contact of the PLC in series, the first group of normally closed contacts A is connected with an X27 contact of the PLC in series, and one end of the second group of normally closed contacts B is connected with a power supply;
the second intermediate relay comprises a first group of normally closed contacts D, a second group of normally closed contacts E and a group of normally open contacts F, wherein the group of normally open contacts F is connected with an X26 contact of the PLC in series, the first group of normally closed contacts D is connected with an X27 contact of the PLC in series, one end of the second group of normally closed contacts E is connected with the other end of the second group of normally closed contacts B of the first intermediate relay, and the other end of the second group of normally closed contacts E is connected with an X27 contact of the PLC.
The first key switch relay 1KS is provided with at least one group of normally closed contacts G1KS/3 and a group of normally open contacts H1KS/1, the second key switch relay 2KS is provided with at least one group of normally closed contacts I2KS/3 and a group of normally open contacts J2KS/1, the normally open contacts H1KS/1 are respectively connected with the normally closed contacts G1KS/3 and the normally closed contacts I2KS/3, and the normally open contacts J2KS/1 are respectively connected with the normally closed contacts G1KS/3 and the normally closed contacts I2 KS/3; the normally closed contact G1KS/3 is connected with the second intermediate relay 2KD, and the normally closed contact I2KS/3 is connected with the first intermediate relay 1 KD.
The power supply is a 24V power supply.
The utility model has the advantages that: the utility model has simple design, does not change the original circuit basically, and can still work by using the original circuit after the circuit is added; when the power key is turned off, the intermediate relay can output an air compressor unloading signal to the PLC, so that the hidden danger that the air compressor cannot be unloaded normally is eliminated, and the air compressor is more reasonable to start and stop.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a schematic diagram of a conventional circuit.
In the figure, 1KS, a first key switch relay, 2KS, a second key switch relay, 1KD, a first intermediate relay, 2KD, a second intermediate relay, 18KD, a third intermediate relay, P, a main wind pressure switch, 1KD/1, a normally open contact C, 1KD/2, a first group of normally closed contacts A, 1KD/3, a second group of normally closed contacts B, 2KD/1, normally open contacts F, 2KD/2, a first group of normally closed contacts D, 2KD/3, a second group of normally closed contacts E, 1KS/1, normally open contacts H, 1KS/3, normally closed contacts G, 2KS/1, normally open contacts J, 2KS/3, normally closed contacts I, 202 and a power supply circuit.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 2, the drawbacks of the prior art circuit are explained in the background, and the prior art circuit is improved as follows:
the system comprises a PLC, a first key switch relay 1KS, a second key switch relay 2KS, a first intermediate relay 1KD, a second intermediate relay 2KD, a third intermediate relay 18KD and a main wind pressure switch P, wherein the input end of the first key switch relay 1KS is connected with a power supply, and the output end of the first key switch relay 1KS is respectively connected with the first intermediate relay 1KD and the second intermediate relay 2 KD; the input end of the second key switch relay 2KS is connected with a power supply, and the output end of the second key switch relay is respectively connected with a first intermediate relay 1KD and a second intermediate relay 2 KD; the first intermediate relay 1KD is respectively connected with an X26 contact and an X27 contact of the PLC, and the second intermediate relay 2KD is also respectively connected with an X26 contact and an X27 contact of the PLC; the main wind pressure switch P is connected with an X46 contact of the PLC, one end of a third intermediate relay 18KD is connected with a Y22 contact of the PLC, and the other end of the third intermediate relay is connected with a starting motor for controlling the starting and stopping of the air compressor;
the first intermediate relay 1KD comprises a first group of normally closed contacts A1KD/2, a second group of normally closed contacts B1KD/3 and a group of normally open contacts C1KD/1, wherein the group of normally open contacts C1KD/1 are connected with the X26 contact of the PLC in series, the first group of normally closed contacts A1KD/2 are connected with the X27 contact of the PLC in series, and one end of the second group of normally closed contacts B1KD/3 is connected with a power supply;
the second intermediate relay comprises a first group of normally closed contacts D2KD/2, a second group of normally closed contacts E2KD/3 and a group of normally open contacts F2KD/1, wherein the group of normally open contacts F2KD/1 is connected with the X26 contact of the PLC in series, the first group of normally closed contacts D2KD/2 is connected with the X27 contact of the PLC in series, one end of the second group of normally closed contacts E2KD/3 is connected with the other end of the second group of normally closed contacts B1KD/3 of the first intermediate relay 1KD, and the other end of the second group of normally closed contacts E2KD/3 is connected with the X27 contact of the PLC.
Specifically, after the circuits are connected, when the first key switch relay 1KS and the second key switch relay 2KS are both powered off, because one end of the second group of normally closed contacts B1KD/3 is connected with a power supply, the other end of the second group of normally closed contacts B2 KD/3 is connected with the second group of normally closed contacts E2KD/3, and the other end of the second group of normally closed contacts E2KD/3 is connected with the X27 contact of the PLC, the X27 contact of the PLC has current signal input, and the PLC can control the air compressor to unload accordingly; when any one of the first key switch relay 1KS and the second key switch relay 2KS is electrified, the second group of normally closed contacts B1KD/3 or the second group of normally closed contacts E2KD/3 are disconnected, so that the additionally arranged normally closed contact line is disconnected, and the control circuit outputs an instruction to the PLC according to the original line.
The first key switch relay 1KS is provided with at least one group of normally closed contacts G1KS/3 and a group of normally open contacts H1KS/1, the second key switch relay 2KS is provided with at least one group of normally closed contacts I2KS/3 and a group of normally open contacts J2KS/1, the normally open contacts H1KS/1 are respectively connected with the normally closed contacts G1KS/3 and the normally closed contacts I2KS/3, and the normally open contacts J2KS/1 are respectively connected with the normally closed contacts G1KS/3 and the normally closed contacts I2 KS/3; the normally closed contact G1KS/3 is connected with the second intermediate relay 2KD, and the normally closed contact I2KS/3 is connected with the first intermediate relay 1 KD. The part of circuits are original circuits, and the control process is as follows: the initial states of the first key switch relay 1KS and the second key switch relay 2KS are both in a closed state, taking the first key switch relay 1KS as an example, when the first key switch relay 1KS is started by a key, a normally open contact H1KS/1 is switched on, a normally closed contact G1KS/3 is switched off, and a normally closed contact I2KS/3 is still in a switched-on state at the moment, so that a first intermediate relay 1KD connected with the normally closed contact I2KS/3 is started, and corresponding signals are input to the PLC by controlling the switching-on and switching-off of the normally open contact C1KD/1 and a first group of normally closed contacts A1 KD/2; the control principle of the second key switch relay 2KS is the same.
The power supply is a 24V power supply.
According to the utility model discloses a principle if key switch relay has unnecessary normally closed contact, also can add normally closed contact circuit between first key switch relay, second key relay, and its principle is the same with above-mentioned technical scheme, also can solve the problem that the air compressor machine can not normally uninstalled.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
The part of the utility model not detailed is prior art.
Claims (3)
1. A control circuit of an air compressor of a rail locomotive comprises a PLC, a first key switch relay (1 KS), a second key switch relay (2 KS), a first intermediate relay (1 KD), a second intermediate relay (2 KD), a third intermediate relay (18 KD) and a main wind pressure switch (P), wherein the input end of the first key switch relay (1 KS) is connected with a power supply, and the output end of the first key switch relay (1 KS) is respectively connected with the first intermediate relay (1 KD) and the second intermediate relay (2 KD); the input end of the second key switch relay (2 KS) is connected with a power supply, and the output end of the second key switch relay is respectively connected with a first intermediate relay (1 KD) and a second intermediate relay (2 KD); the first intermediate relay (1 KD) is respectively connected with an X26 contact and an X27 contact of the PLC, and the second intermediate relay (2 KD) is also respectively connected with an X26 contact and an X27 contact of the PLC; the main wind pressure switch (P) is connected with an X46 contact of the PLC, one end of a third intermediate relay (18 KD) is connected with a Y22 contact of the PLC, and the other end of the third intermediate relay is connected with a starting motor for controlling the starting and stopping of the air compressor; the method is characterized in that:
the first intermediate relay (1 KD) comprises a first group of normally closed contacts A (1 KD/2), a second group of normally closed contacts B (1 KD/3) and a group of normally open contacts C (1 KD/1), wherein the group of normally open contacts C (1 KD/1) is connected with the X26 contact of the PLC in series, the first group of normally closed contacts A (1 KD/2) is connected with the X27 contact of the PLC in series, and one end of the second group of normally closed contacts B (1 KD/3) is connected with a power supply;
the second intermediate relay (2 KD) comprises a first group of normally closed contacts D (2 KD/2), a second group of normally closed contacts E (2 KD/3) and a group of normally open contacts F (2 KD/1), wherein the group of normally open contacts F (2 KD/1) is connected with the X26 contact of the PLC in series, the first group of normally closed contacts D (2 KD/2) is connected with the X27 contact of the PLC in series, one end of the second group of normally closed contacts E (2 KD/3) is connected with the other end of the second group of normally closed contacts B (1 KD/3) of the first intermediate relay (1 KD), and the other end of the second group of normally closed contacts E (2 KD/3) is connected with the X27 contact of the PLC.
2. The air compressor control circuit of the rail locomotive as claimed in claim 1, wherein: the first key switch relay (1 KS) is provided with at least one group of normally closed contacts G (1 KS/3) and a group of normally open contacts H (1 KS/1), the second key switch relay (2 KS) is provided with at least one group of normally closed contacts I (2 KS/3) and a group of normally open contacts J (2 KS/1), the normally open contacts H (1 KS/1) are respectively connected with the normally closed contacts G (1 KS/3) and the normally closed contacts I (2 KS/3), and the normally open contacts J (2 KS/1) are respectively connected with the normally closed contacts G (1 KS/3) and the normally closed contacts I (2 KS/3); the normally closed contact G (1 KS/3) is connected with the second intermediate relay (2 KD), and the normally closed contact I (2 KS/3) is connected with the first intermediate relay (1 KD).
3. The air compressor control circuit of the rail locomotive as claimed in claim 1, wherein: the power supply is a 24V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120380138.4U CN214424678U (en) | 2021-02-20 | 2021-02-20 | Control circuit of air compressor of rail locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120380138.4U CN214424678U (en) | 2021-02-20 | 2021-02-20 | Control circuit of air compressor of rail locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214424678U true CN214424678U (en) | 2021-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120380138.4U Active CN214424678U (en) | 2021-02-20 | 2021-02-20 | Control circuit of air compressor of rail locomotive |
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| Country | Link |
|---|---|
| CN (1) | CN214424678U (en) |
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2021
- 2021-02-20 CN CN202120380138.4U patent/CN214424678U/en active Active
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