CN210223883U - Electric control mechanism of high-voltage isolating switch - Google Patents
Electric control mechanism of high-voltage isolating switch Download PDFInfo
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- CN210223883U CN210223883U CN201921280560.1U CN201921280560U CN210223883U CN 210223883 U CN210223883 U CN 210223883U CN 201921280560 U CN201921280560 U CN 201921280560U CN 210223883 U CN210223883 U CN 210223883U
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Abstract
The utility model discloses a high voltage isolator's electrical control mechanism, this mechanism includes: the first travel switch is connected with the first coil in series, the second travel switch is connected with the second coil in series, and the piston rod position following unit is connected with the first travel switch and used for disconnecting the first travel switch when the piston rod is retracted to a position where the high-voltage isolating switch is disconnected; the piston rod position following unit is also connected with a second travel switch and used for disconnecting the second travel switch when the piston rod is collected to extend to the position where the high-voltage isolating switch is switched on. The utility model discloses after high voltage isolator separating brake or combined floodgate action are accomplished, automatic power disconnection with the coil and keep original operating condition unchangeable, make whole equipment be in outage running state, prevent that power surge voltage from assaulting and damaging the device, improve coil life.
Description
Technical Field
The utility model relates to a high-voltage isolator field in rail transit fields such as high-speed railway, EMUs, electric locomotive and subway especially relates to high-voltage isolator's electrical control mechanism.
Background
The high-voltage isolating switch is an important part of a main circuit of a motor train unit and a locomotive vehicle, and has the function of isolating a fault part of the main circuit and ensuring the normal operation of the vehicle.
At present, high-voltage isolating switches used on motor train units and rolling stocks are mainly in an electric control mode. A control system is composed of a two-position five-way electromagnetic valve, an air cylinder and electric elements connected with the air cylinder, and the opening and closing actions of the high-voltage isolating switch are controlled through a transmission mechanism. The transmission mechanism is attached with a signal feedback device which is used for judging the opening and closing states of the high-voltage isolating switch. The electromagnetic valve is provided with two coils, one for controlling the opening of the high-voltage isolating switch, and the other for controlling the closing of the high-voltage isolating switch.
The electromagnetic valve of the traditional high-voltage isolating switch is in a long-term power supply working mode, and one of two coils of the two-position five-way electromagnetic valve is always in a power-on state. Because surge voltage can be generated on power supplies of motor train units and rolling stocks, when the surge voltage exceeds the bearing limit of a surge protection device of a solenoid valve coil, the solenoid valve coil or the surge protection device of the coil can be damaged. At present, the problem is relatively serious on a high-voltage isolating switch of the motor train unit, no good solution is provided, and great trouble is caused to the normal operation of the motor train unit.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric control mechanism of high voltage isolator for solve the fragile technical problem of the surge protection device of the solenoid valve coil or coil of current high voltage isolator's electrical control mode.
In order to solve the technical problem, the utility model provides a technical scheme does:
an electrical control mechanism of a high-voltage isolating switch comprises a two-position five-way electromagnetic valve, an air cylinder and a transmission mechanism, wherein the two-position five-way electromagnetic valve comprises a first coil and a second coil, and the first coil is connected with a first control end of the air cylinder so as to control a piston rod to retract when the first coil is electrified and control the high-voltage isolating switch to be switched off through the transmission mechanism; the second coil is connected with the second control end of the cylinder so as to control the piston rod to extend out to control the high-voltage isolating switch to be switched on through the transmission mechanism when the second coil is electrified; it is characterized in that the preparation method is characterized in that,
the electric control mechanism further includes: the first travel switch is connected with the first coil in series, the second travel switch is connected with the second coil in series, and the piston rod position following unit is connected with the first travel switch and used for disconnecting the first travel switch when the piston rod is retracted to a position where the high-voltage isolating switch is disconnected; the piston rod position following unit is also connected with a second travel switch and used for disconnecting the second travel switch when the piston rod is collected to extend to the position where the high-voltage isolating switch is switched on.
Preferably, the piston rod position following unit is a cam, at least two notches are arranged on the circumference of the cam, a rotating shaft of the cam is fixed on the piston rod through a transmission sleeve so that the cam rotates forwards or backwards when the piston rod stretches and reciprocates, and when the piston rod retracts to the position where the high-voltage disconnecting switch is disconnected, a contact of the first travel switch enters the notches; and when the piston rod extends to the position where the high-voltage isolating switch is switched on, the contact of the second travel switch enters the notch.
Preferably, a group of normally open contacts of the first travel switch is connected in series with the first coil, the normally open contacts are closed when the contacts of the first travel switch leave the notch, and the normally open contacts are opened when the contacts of the first travel switch enter the notch;
a group of normally open contacts of the second travel switch is connected with the second coil in series; the opening contact is closed when the contact of the second travel switch leaves the notch and is opened when the contact of the second travel switch enters the notch.
Preferably, the first and second stroke switches are respectively disposed outside the circumference of the cam in the piston rod telescopic reciprocating direction.
The utility model discloses following beneficial effect has:
the utility model discloses a high voltage isolator's electrical control mechanism, through the power of controlling two-position five-way solenoid valve, after high voltage isolator separating brake or combined floodgate action were accomplished, automatic with the power disconnection of coil and keep original operating condition unchangeable, make whole equipment be in outage running state, prevent the impact damage of power surge voltage to coil surge protection device. Meanwhile, after the power supply is cut off, the coil does not need to work in a long-term electrified mode, and the service life of the coil can be prolonged. The method can be widely applied to the fields of electric locomotives, motor train units, high-speed rails, urban rail transit and the like.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural diagram of an electrical control mechanism of a high-voltage isolating switch according to a preferred embodiment of the invention;
fig. 2 is a schematic circuit diagram of an electrical control mechanism of the high-voltage isolating switch according to the preferred embodiment of the invention.
The reference numerals in the figures denote:
1. mounting a bottom plate; 2. a cylinder; 3. a gas circuit connecting plate; 4. an electromagnetic valve; 5. an air source interface; 6. a first travel switch; 7. a cam; 8. a rotating shaft; 9. a connecting rod; 10. a transmission sleeve; 11. a connecting pin; 12. a connector; 13. a second travel switch.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Fig. 1 is a schematic structural diagram of an electrical control mechanism of a high-voltage disconnecting switch in this embodiment. Fig. 2 is a schematic circuit diagram of an electrical control mechanism of the high-voltage isolating switch according to the preferred embodiment of the invention. The existing electric control mechanism of the high-voltage isolating switch comprises a two-position five-way electromagnetic valve 4, an air cylinder 2 and a transmission mechanism, wherein the two-position five-way electromagnetic valve 4 comprises a first coil and a second coil, and the first coil is connected with a first control end of the air cylinder 2 so as to control a piston rod to retract when the first coil is electrified and control the high-voltage isolating switch to be switched off through the transmission mechanism; the second coil is connected with the second control end of the cylinder 2 so as to control the piston rod to extend out to control the high-voltage isolating switch to be switched on through the transmission mechanism when the second coil is electrified. Referring to fig. 1 and 2, a first travel switch 6 connected in series with the first coil, a second travel switch 13 connected in series with the second coil, and a piston rod position following unit are further added, and the piston rod position following unit is connected with the first travel switch 6 and used for disconnecting the first travel switch 6 when the piston rod is retracted to a position where high-voltage disconnecting switch opening is completed; the piston rod position following unit is also connected with a second travel switch 13 and used for disconnecting the second travel switch 13 when the piston rod is collected to extend to a position where the high-voltage isolating switch is switched on.
According to the structure, by controlling the power supply of the two-position five-way electromagnetic valve 4, after the switching-off or switching-on action of the high-voltage isolating switch is completed, the power supply of the coil is automatically disconnected to keep the original working state unchanged, so that the whole equipment is in a power-off running state, and the impact damage of power supply surge voltage to a coil surge protection device is prevented. Meanwhile, after the power supply is cut off, the coil does not need to work in a long-term electrified mode, and the service life of the coil can be prolonged. The method can be widely applied to the fields of electric locomotives, motor train units, high-speed rails, urban rail transit and the like.
During implementation, the piston rod position following unit is a cam 7, at least two gaps are arranged on the circumference of the cam 7, a rotating shaft 8 of the cam 7 is fixed on the piston rod through a transmission sleeve 10 (in the embodiment, the rotating shaft is fixed on a connecting rod 9 connected with the piston rod through a connecting pin 11) so that the cam 7 rotates forwards or backwards when the piston rod stretches and reciprocates, and when the piston rod retracts to a position where high-voltage disconnecting switch opening is completed, a contact of the first travel switch 6 enters the gap; and when the piston rod extends to the position where the high-voltage isolating switch is switched on, the contact of the second travel switch 13 enters the notch. Wherein, a group of normally open contacts of the first travel switch 6 is connected in series with the first coil, when the contact of the first travel switch 6 leaves the gap, the normally open contacts are closed, and when the contact of the first travel switch 6 enters the gap, the normally open contacts are opened; a group of normally open contacts of the second travel switch 13 is connected in series with the second coil; the open contacts are closed when the contacts of the second travel switch 13 leave the notch and are open when the contacts of the second travel switch 13 enter the notch. The first and second stroke switches 6 and 13 are respectively arranged outside the circumference of the cam 7 in the piston rod telescopic reciprocating direction.
Referring to fig. 1, the high voltage isolator is provided with a mounting base plate 1 for integral mounting; the cylinder 2, the gas circuit connecting plate 3, the two-position five-way electromagnetic valve 4 and the gas source interface 5 form a driving mechanism of the high-pressure isolating switch. A first travel switch 6 and a second travel switch 13 are arranged on the bottom plate, and two coils of the two-position five-way electromagnetic valve 4 are respectively connected with an external power supply through the two travel switches. The cam 7 controls the on-off of the first travel switch 6 and the second travel switch 13 through notches on the circumference of the wheel. The driving sleeve 10 is fixed on the rotating shaft 8, a waist-shaped groove is formed in an extending arm of the driving sleeve, and the connecting pin 11 enables the piston rod and the driving sleeve 10 to be hinged on the connecting rod 9 through the waist-shaped groove so as to convert the reciprocating motion of the piston of the air cylinder 2 into the forward and reverse rotating motion of the rotating shaft 8. The connector 12 is used for connecting the power supply of the control coil of the electromagnetic valve 4 and a feedback signal for connecting the opening and closing states of the high-voltage isolating switch.
Referring to fig. 2, two ends of the two-position five-way solenoid valve 4 are respectively provided with a coil a and a coil b, which respectively control the on-off of an air path between an air source connector of the two-position five-way solenoid valve 4 and a A, B end of the air cylinder 2, the two-position five-way solenoid valve 4 has a self-holding function, the on-state of an air port of the solenoid valve 4 is kept unchanged under the condition that the coils a and b of the two-position five-way solenoid valve 4 are not electrified, the two travel switches respectively comprise a group of normally closed contacts ① - ② and a group of normally open contacts ③ - ④, one end of the coil a is connected with a power supply U1+, the other end is connected with a normally open contact ③ of the travel switch 5, the normally open contact ④ of the first travel switch 6 is connected with the power supply U1-, one end of the coil b is connected with the power supply U2+, the other end is connected with the normally open contact ③ of the second travel switch 13, the.
The working process of the embodiment is as follows:
when the high-voltage isolating switch is in a switch-off position and needs to be switched on, a driver control room energizes a coil B, an electromagnetic valve 4 works, an air source interface 5 is communicated with a terminal B of an air cylinder 2, compressed air enters the air cylinder 2 to push a piston rod to move towards a terminal A, the piston rod completes the switch-on action of the high-voltage isolating switch through a transmission mechanism and simultaneously drives a rotating shaft 8 to drive a cam 7 to rotate, after a piston is pushed to the terminal A in the air cylinder, the switch-on action of the high-voltage isolating switch is completed, at the moment, a gap of the cam 7 just rotates to the position of a contact of a second travel switch 13, the contact of the second travel switch 13 is released, normally open contacts ③ - ④ are disconnected, normally closed contacts ① - ② are closed, at the moment, a power supply circuit of the coil B is disconnected with the coil B, the gas circuit cannot change due to the fact that the two-position five-way electromagnetic valve 4 has a self-holding function, the high-voltage isolating switch can be in a constant state, the high-voltage isolating switch-off operation function is realized, and at the.
When the high-voltage isolating switch needs to be opened, a coil a is electrified by a driver control room, the electromagnetic valve 4 works, the air source interface 5 is communicated with the end A of the cylinder 2, compressed air enters the cylinder 2 to push the piston to move towards the end B, the piston rod completes the opening action of the high-voltage isolating switch through the transmission mechanism and simultaneously drives the rotating shaft 8 to drive the cam 7 to rotate, when the piston pushes the end B in the cylinder 2, the opening action of the high-voltage isolating switch is completed, the notch of the cam 7 just rotates to the position of the contact of the first travel switch 6 at the moment, the contact of the first travel switch 6 is released, the normally open contacts ③ - ④ are opened, the normally closed contacts ① - ② are closed, the power supply circuit of the coil a is also opened at the moment, and the high-voltage isolating switch is kept in the.
During actual use, the coil b can be used for controlling the high-voltage isolating switch to be switched off, and the coil a can be used for controlling the high-voltage isolating switch to be switched on.
The power supply control steps when the high-voltage isolating switch works in the embodiment are as follows:
after a first coil of the two-position five-way electromagnetic valve 4 is electrified, a piston rod of the air cylinder 2 retracts to control the high-voltage isolating switch to be switched off through the transmission mechanism, and then the power supply of the first coil is disconnected; after the second coil of the two-position five-way electromagnetic valve 4 is electrified, the piston rod of the air cylinder 2 extends out and controls the high-voltage isolating switch to be switched on through the transmission mechanism, and then the power supply of the second coil is disconnected. The power supply of the coil is automatically disconnected and the original working state is kept unchanged, so that the whole equipment is in a power-off running state, and the impact damage of the power supply surge voltage to the coil surge protection device is prevented.
To sum up, the utility model discloses a after high voltage isolator separating brake or combined floodgate action are accomplished, automatic with the power disconnection and keep original operating condition unchangeable, make whole equipment be in outage running state, prevent that power surge voltage from damaging the impact of coil surge protection device. Meanwhile, after the power supply is cut off, the coil does not need to work in a long-term electrified mode, and the service life of the coil can be prolonged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An electrical control mechanism of a high-voltage isolating switch comprises a two-position five-way electromagnetic valve (4), an air cylinder (2) and a transmission mechanism, wherein the two-position five-way electromagnetic valve (4) comprises a first coil and a second coil, and the first coil is connected with a first control end of the air cylinder (2) so as to control a piston rod to retract when the first coil is electrified and control the high-voltage isolating switch to be switched off through the transmission mechanism; the second coil is connected with a second control end of the air cylinder (2) so as to control the piston rod to extend out to control the high-voltage isolating switch to be switched on through the transmission mechanism when the second coil is electrified; it is characterized in that the preparation method is characterized in that,
the electric control mechanism further includes: the first travel switch (6) is connected with the first coil in series, the second travel switch (13) is connected with the second coil in series, and the piston rod position following unit is connected with the first travel switch (6) and used for disconnecting the first travel switch (6) when the piston rod is retracted to a position where the high-voltage isolating switch is disconnected; the piston rod position following unit is also connected with a second travel switch (13) and used for disconnecting the second travel switch (13) when the piston rod is collected to extend to the position where the high-voltage isolating switch is switched on.
2. The electrical control mechanism of the high-voltage isolating switch according to claim 1, characterized in that the piston rod position following unit is a cam (7), the circumference of the cam (7) is provided with at least two notches, the rotating shaft of the cam (7) is fixed on the piston rod through a transmission sleeve (10) so that the cam (7) rotates forwards or backwards when the piston rod extends and retracts to and fro, and the contact of the first travel switch (6) enters the notches when the piston rod retracts to the position for completing the opening of the high-voltage isolating switch; and when the piston rod extends to the position where the high-voltage isolating switch is switched on, the contact of the second travel switch (13) enters the notch.
3. The electrical control mechanism of a high-voltage disconnector according to claim 2, characterized in that a set of normally open contacts of the first stroke switch (6) is connected in series with the first coil, which normally open contacts are closed when the contacts of the first stroke switch (6) leave the gap and are open when the contacts of the first stroke switch (6) enter the gap;
a group of normally open contacts of the second travel switch (13) is connected with the second coil in series; the normally open contact is closed when the contact of the second travel switch (13) leaves the notch, and the normally open contact is open when the contact of the second travel switch (13) enters the notch.
4. The electrical control mechanism of a high-voltage isolating switch according to claim 2, characterized in that the first travel switch (6) and the second travel switch (13) are respectively arranged outside the circumference of the cam (7) in the piston rod telescopic reciprocating direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921280560.1U CN210223883U (en) | 2019-08-08 | 2019-08-08 | Electric control mechanism of high-voltage isolating switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921280560.1U CN210223883U (en) | 2019-08-08 | 2019-08-08 | Electric control mechanism of high-voltage isolating switch |
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| CN210223883U true CN210223883U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921280560.1U Active CN210223883U (en) | 2019-08-08 | 2019-08-08 | Electric control mechanism of high-voltage isolating switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459428A (en) * | 2019-08-08 | 2019-11-15 | 株洲庆云电力机车配件工厂有限公司 | The electrical control mechanism and control method of high voltage isolator |
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2019
- 2019-08-08 CN CN201921280560.1U patent/CN210223883U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459428A (en) * | 2019-08-08 | 2019-11-15 | 株洲庆云电力机车配件工厂有限公司 | The electrical control mechanism and control method of high voltage isolator |
| CN110459428B (en) * | 2019-08-08 | 2024-04-19 | 株洲庆云电力机车配件工厂有限公司 | Electric control mechanism and control method for high-voltage isolating switch |
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