CN211062638U - Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation - Google Patents
Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation Download PDFInfo
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- CN211062638U CN211062638U CN201922198577.9U CN201922198577U CN211062638U CN 211062638 U CN211062638 U CN 211062638U CN 201922198577 U CN201922198577 U CN 201922198577U CN 211062638 U CN211062638 U CN 211062638U
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Abstract
The utility model aims to solve the technical problems that in the existing GIS three-phase linkage isolating switch without auxiliary contacts, the operation of a B, C isolating switch body is not in place, and an operator cannot observe the isolating switch body well and easily brings great risk of non-full-phase operation of the isolating switch, wherein the installing plate comprises an L type cross section, the installing plate comprises a plate body A and a plate body B, a guide groove is arranged on the plate body A, a round hole is arranged on the plate body B, a first micro switch and a second micro switch are arranged on the plate body A, and micro switch contacts and travel contacts are arranged on the first micro switch and the second micro switch.
Description
Technical Field
The utility model relates to an isolator and accessory equipment thereof, concretely relates to prevent that position contact of 500kV GIS three-phase coordinated type isolator non-complete phase operation from constituting the structure.
Background
The GIS three-phase linkage type isolating switch is an operating mechanism shared by three phases, and the operating mechanism is arranged on a first phase, namely an A phase. The connecting rod is connected with an intermediate gear box of the B, C box, and a transmission gear on the connecting rod drives a body gear in the gear box so as to realize linkage.
The position contact of the original GIS three-phase linkage type isolating switch leads out the auxiliary contact in the A-phase operating mechanism and sends the auxiliary contact to a monitoring or protecting device as the position criterion of the isolating switch, and B, C phases have no auxiliary contact. When the operation of the B, C phase isolating switch body is not in place due to the fact that the link of the B, C phase is damaged or falls off and the like, the auxiliary contact in the A phase operating mechanism is only led out, the monitoring background is often difficult to find, and due to the fact that the body mechanism is located in the closed SF6 air chamber, operators cannot observe visually, and therefore the risk that the isolating switch does not run in a full phase is high.
In addition, the case that the differential protection action of a main transformer is caused in the main transformer power recovery process because the phase separation brake of a certain blade B is not in place also occurs together with the fault that the system has larger unbalanced current caused by the fact that the phase separation brake of the certain blade B is not in place in a certain large hydropower plant. Because the monitoring system and the protection device adopt auxiliary contacts in the A-phase mechanism, the position of the B, C-phase isolating switch body cannot be accurately judged, and two accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the operation of the B, C phase isolating switch body is not in place in the GIS three-phase linkage isolating switch of the prior B, C phase-free auxiliary contact, and the operating personnel can not observe well and visually, thus bringing about the technical problem of the risk of the non-full phase operation of the large isolating switch easily.
In order to solve the technical problem, the utility model provides a following technical scheme:
the device comprises a mounting plate with a section of L type, wherein the mounting plate comprises a plate body A and a plate body B, a guide groove is arranged on the plate body A, a round hole is formed in the plate body B, a first micro switch and a second micro switch are arranged on the plate body A, micro switch contacts and travel contacts are arranged on the first micro switch and the second micro switch, the device also comprises a lead screw, a sliding block with an internal thread hole and a driving rod fixedly arranged on the outer wall of the sliding block, the driving rod penetrates through the guide groove and extends into one side of the plate body A and extends out of the other side of the plate body A, and the two travel contacts are positioned on two sides of the extending end of the driving rod.
The connecting part of the lead screw is used for being connected with the end part of the transmission connecting rod.
The transmission connecting rod rotates to drive the screw rod to rotate, so that the sliding block can axially move on the screw rod.
The first microswitch is connected with the plate body A of the mounting plate through the first fixing plate and the second microswitch through the second fixing plate, and fixing plate groove bodies which are oppositely arranged are arranged on the first fixing plate and the second fixing plate.
Above-mentioned first fixed plate, the motion that is close or keeps away from can be done to the second fixed plate, can make 2 fixed plate cell bodies be close each other or keep away from, and first fixed plate and second fixed plate cooperate in order to realize being connected through the fixed plate bar hole that sets up on it with fixed plate installation screw, at first micro-gap switch, the second micro-gap switch cooperates in order to realize being connected with first fixed plate, second fixed plate through the micro-gap switch mounting hole that is equipped with on it and micro-gap switch installation screw.
The gearbox comprises a gearbox support, a transmission connecting rod gear seat and a body gear seat engaged with the transmission connecting rod gear seat are arranged in the gearbox support, and a transmission end of the transmission connecting rod extends into the gearbox and is connected with a transmission part of the transmission connecting rod gear seat; the transmission connecting rod drives the transmission connecting rod gear seat to rotate, so that the body gear seat is driven to rotate to enable the disconnecting/closing of the isolating switch body.
The utility model has the advantages that:
1) the utility model relates to a lead screw slider device realizes turning into secondary electrical component travel switch position contact with 500kV GIS three-phase coordinated type isolator B, C looks primary equipment divide-shut brake position and draws forth, and the design is unique, design benefit.
2) The utility model discloses draw forth the position contact of 500kV GIS three-phase coordinated type isolator B, C looks, establish ties with A phase position contact to the realization is to the accurate supervision of three-phase switch position.
3) The utility model provides a this kind of method thinking is clear, simple, and the effect is reliable, can prevent effectively that 500kV GIS three-phase coordinated type isolator transmission connecting rod from splitting, droing, primary equipment trouble such as not hard up, causes the not full phase operation of isolator, leads to the emergence of primary equipment damage accident, avoids great economic loss, can improve the operational reliability of GIS primary equipment, has great practical value.
Drawings
Fig. 1 and 2 are schematic structural views of the present invention;
FIG. 3 is a schematic view of the present invention connected to a gear box;
FIG. 4 is a schematic diagram of the routing of phase position contact outgoing lines of isolation switch B, C;
fig. 5 is a schematic diagram showing a circuit comparison between the conventional position contact of the isolating switch and the position contact of the present invention.
Detailed Description
As shown in figures 1 and 2, the position contact forming device for preventing the incomplete phase operation of the 500kV GIS three-phase linkage type isolating switch comprises a mounting plate 9 with the section of L type, wherein the mounting plate 9 comprises a plate body A and a plate body B, a guide groove 11 is arranged on the plate body A, a round hole 17 is arranged on the plate body B, a first micro switch 1 and a second micro switch are arranged on the plate body A, micro switch contacts 2 and travel contacts 4 are respectively arranged on the first micro switch 1 and the second micro switch, the device further comprises a lead screw 13, a sliding block 15 with an internal thread hole, and a driving rod 16 fixedly arranged on the outer wall of the sliding block 15, the driving rod 16 penetrates through the guide groove 11 and extends into one side of the plate body A and extends out of the other side of the plate body A, and the two travel contacts 4 are positioned on two sides of the extending end.
The connecting part of the lead screw 13 is used for connecting with the end part of the transmission connecting rod 19.
The rotation of the transmission connecting rod 19 can drive the screw 13 to rotate, so that the sliding block 15 can move axially on the screw 13.
The plate body B is provided with an attachment plate mounting hole 12, and a screw fixing hole 14 is provided at a connection portion of a screw 13.
Further, the first microswitch 1 is connected with the plate body a of the mounting plate 9 through a first fixing plate 5 and a second microswitch through a second fixing plate, and fixing plate grooves which are oppositely arranged are arranged on the first fixing plate 5 and the second fixing plate.
First fixed plate 5, the second fixed plate can be done and is close or the motion of keeping away from, can make 2 fixed plate cell bodies 7 be close each other or keep away from, first fixed plate 5 and second fixed plate cooperate in order to realize being connected through the fixed plate bar hole 8 that sets up on it with fixed plate installation screw 10, at first micro-gap switch 1, the second micro-gap switch cooperates in order to realize with first fixed plate 5 through the micro-gap switch mounting hole 3 that is equipped with on it and micro-gap switch installation screw 6, the second fixed plate is connected.
Preferably, the fixing plate groove body 7 is preferably a fixing plate U-shaped groove.
The gearbox comprises a gearbox support 18, a transmission connecting rod gear seat 20 and a body gear seat 21 meshed with the transmission connecting rod gear seat 20 are arranged in the gearbox support 18, and the transmission end of a transmission connecting rod 19 extends into the gearbox and is connected with the transmission part of the transmission connecting rod gear seat 20; the transmission link 19 drives the transmission link gear seat 20 to rotate, thereby driving the body gear seat 21 to rotate to open/close the disconnector body.
Specifically, in use, see the following step flow:
(1) structure and working principle description of lead screw slider device
As shown in fig. 1 to 3, two microswitches have microswitch connection points, each microswitch diagonal has two microswitch mounting holes 3, a fixing plate has a microswitch mounting screw hole corresponding to the microswitch mounting hole 3, and the microswitch is fixed on the fixing plate by screws through the microswitch mounting holes and the microswitch mounting screw holes.
On the fixed plate, there is fixed plate bar hole 8, has the fixed plate installation screw 10 that corresponds with it on mounting panel 9 to the realization passes through fixed plate bar hole 8 and fixed plate installation screw 10 with the screw mounting on mounting panel 9 with the fixed plate, fixed plate bar hole 8 on the fixed plate, fine setting about the fixed plate of being convenient for.
The linear distance of the guide groove 11 is adjustable by adjusting the fixing plate, the other side of the mounting plate 9 is fixed on an isolation switch B, C phase gear box support 18 through a mounting plate mounting hole 12 by screws, the gear box support 18 is provided with a mounting plate mounting screw hole, the middle of the other side of the mounting plate 9 is provided with a mounting plate central round hole 17 for a transmission connecting rod 19 to pass through, the lead screw 13 is fixed on the transmission connecting rod 19 through a lead screw fixing hole 14 by screws, the slider 15 is installed on the lead screw 13 through threads, the driving rod 16 extends into the guide groove 11, the operating mechanism drives the transmission connecting rod 19 and the transmission gear seat 20 to rotate and drives the body gear seat 21 to rotate to drive the body mechanism to open and close, the transmission connecting rod 19 converts the rotary motion of the transmission connecting rod 19 into the linear motion of the slider 15 through the lead screw 13 and the slider 15, records the linear motion of the isolation switch from the open and close, or when the switch is closed, the linear stroke L of the slider 15 is measured, fine-adjusted according to the linear stroke L until the fixing plate 5 is adjusted, the micro-switch contact point of the micro switch is led out, and the micro switch is just led out, so that the micro switch contacts of the micro switch 15 are just led out, and the micro switch is just led out when the micro switch, thereby the micro switch contact point is triggered.
(2) Description of the selection of microswitch
The microswitch 1 is internally provided with 1 group of normally open contacts, the contact adopts silver-based alloy, the elastic element adopts beryllium bronze, the machine body adopts engineering plastics with excellent insulating property, and the connecting terminal adopts a welding terminal type. The suggested technical parameters for the selection of the microswitch are as follows:
1. rated operating voltage: DC 250V;
2. rated operating current: DC 250V, 5A;
3. power frequency withstand voltage: 2500V (AC);
4. contact resistance: less than or equal to 30m omega;
5. electrical life: more than 10 ten thousand times;
6. mechanical life: more than 100 ten thousand times.
And 2, leading out the microswitch contact of the isolation switch B, C phase gearbox to the A phase operating mechanism box by using a lead.
The utility model relates to a reference numeral 3 explains as follows:
19. a transmission connecting rod, a 22 phase and A phase operating mechanism box, a 23 phase and B phase gear box, a 24 phase and C phase gear box and a 25 phase26, M24 × 1.5 cable joint, 27, M24 × 1.5 cable joint matching metal hose, 28, 1.5mm2BVR flexible wire.
The bottom cover plates of the B-phase gear box 23 and the C-phase gear box 24 of the isolating switch are provided with phi 25 through holes, and 4 pieces of 1.5mm through holes are respectively adopted2BVR flexible wire 28, lead-out position contact, 1.5mm2The BVR cord 28 is soldered to the microswitch contact 2 in the B-phase gear case 23 and the C-phase gear case 24. 1.5mm2BVR flexible wire 28 is laid on the through holes phi 25 of the bottom cover plates of the B-phase gear box 23 and the C-phase gear box 24 and led out, M24 × 1.5 cable joint 26 and matched metal flexible pipe 27 are additionally arranged at the through holes phi 25 of the bottom cover plates of the B-phase gear box 23 and the C-phase gear box 24 to be used as protective sleeve layers, and 1.5mm of flexible wire is led out2 BVR cord 28 is laid to cable box 25, and from cable box 25 to a-phase operating mechanism box 22.
A phi 25 through hole is arranged on the side surface of the A-phase operating mechanism box 22, and an M24 × 1.5 cable joint 26 and a matched metal hose 27 are additionally arranged, wherein the diameter of the cable joint is 1.5mm, and the cable joint is led out from the B, C phase2The BVR cord 28 is thus connected by the M24 × 1.5 cable connector 26 to the a-phase cabinet 22.
As shown in fig. 4, the conventional position contact of the isolating switch and the position contact of the present invention constitute a schematic circuit comparison. Increase 4 terminals on terminal guide rail in the A looks mechanism case, terminal number: 5. 6, 7, 8, the specific connections of the terminals are shown in fig. 4. The auxiliary contacts of the disconnecting switch A in the phase mechanism box are recorded as s1a and s2a, the auxiliary contacts of the disconnecting switch A are recorded as s3a and s4a, the contacts of the disconnecting switch B, which are newly led out, at the closing position are recorded as s1B and s2B, the contacts of the disconnecting switch B, which are recorded as s3B and s4B, the contacts of the disconnecting switch C, which are newly led out, at the closing position are recorded as s1C and s2C, and the contacts of the disconnecting switch C, which are recorded as s3C and s 4C. The original connection of the contacts at the switching-on position is as follows: s1a-X1, s2a-X2, the connection of the original brake separating position contact is as follows: s3a-X3, s4a-X4, X1, X2, X3, X4 are terminal in the plug connector, the utility model discloses closing position contact wiring is: s1a-X1, s2c-X2, s2a establishes ties with s1b through No. 5 terminal, and s2b establishes ties with s1c through No. 6 terminals, finally passes through s1a-X1 with the combined floodgate contact after the three-phase series connection, and s2c-X2 is drawn forth by former plug connector, the utility model discloses divide floodgate position contact to be: and s3a-X3, s4c-X4 and s4a are connected with s3b in series through a No. 7 terminal, s4b is connected with s3c in series through a No. 8 terminal, and finally the opening contact after three-phase series connection is led out from the original plug connector through s3a-X3 and s4c-X4, so that external cable connection is not influenced.
And 4, testing and verifying.
And (3) after the steps 1 to 3 are finished, checking that the loop is connected without errors, and the insulation resistance to the ground is more than 10M omega. And (4) performing a switching-on and switching-off operation test on the installed isolating switch, after each operation, checking that the A phase position contact signal is consistent with the newly added B, C phase position contact signal by using a universal meter, and checking that the switching-on and switching-off position signal of the isolating switch is correct by using a monitoring center.
Claims (6)
1. The device is characterized by comprising a mounting plate (9) with the section of L type, wherein the mounting plate (9) comprises a plate body A and a plate body B, a guide groove (11) is formed in the plate body A, a round hole (17) is formed in the plate body B, a first micro switch (1) and a second micro switch are arranged on the plate body A, a micro switch contact (2) and a travel contact (4) are arranged on each of the first micro switch (1) and the second micro switch, the device further comprises a lead screw (13), a sliding block (15) with an internal thread hole and a driving rod (16) fixedly arranged on the outer wall of the sliding block (15), the driving rod (16) penetrates through the guide groove (11) and extends into one side of the plate body A and extends out of the other side of the plate body A, and the two travel contacts (4) are positioned on two sides of the extending end of the driving rod (16).
2. The device for preventing the position contact of the three-phase linkage type isolating switch from running in a non-full phase according to claim 1, is characterized in that: the connecting part of the lead screw (13) is used for being connected with the end part of the transmission connecting rod (19).
3. The device for preventing the position contact of the three-phase linkage type isolating switch from running in a non-full phase according to claim 2, is characterized in that: the transmission connecting rod (19) rotates to drive the screw rod (13) to rotate, so that the sliding block (15) can move axially on the screw rod (13).
4. The device for preventing the position contact of the three-phase linkage type disconnecting switch from operating in a non-full phase according to one of the claims 1 to 3, is characterized in that: first micro-gap switch (1) passes through first fixed plate (5), the second micro-gap switch passes through the second fixed plate to be connected with the plate body A of mounting panel (9), is equipped with the relative fixed plate cell body that sets up on first fixed plate (5), the second fixed plate.
5. The device for preventing the position contact of the three-phase linkage type isolating switch from running in a non-full phase according to claim 4, is characterized in that: first fixed plate (5), the motion that is close or keeps away from can be done to the second fixed plate, can make 2 fixed plate cell bodies (7) be close to each other or keep away from, first fixed plate (5) and second fixed plate are through fixed plate bar hole (8) and fixed plate installation screw (10) cooperation that set up on it in order to realize being connected, at first micro-gap switch (1), micro-gap switch through its last micro-gap switch mounting hole (3) and micro-gap switch installation screw (6) cooperation that is equipped with in order to realize with first fixed plate (5), the connection of second fixed plate.
6. The device for preventing the position contact of the three-phase linkage type disconnecting switch from operating in a non-full phase according to claim 2, 3 or 5, is characterized in that: the gearbox comprises a gearbox support (18), a transmission connecting rod gear seat (20) and a body gear seat (21) meshed with the transmission connecting rod gear seat (20) are arranged in the gearbox support (18), and the transmission end of a transmission connecting rod (19) extends into the gearbox and is connected with the transmission part of the transmission connecting rod gear seat (20); the transmission connecting rod (19) drives the transmission connecting rod gear seat (20) to rotate, so that the body gear seat (21) is driven to rotate to enable the disconnecting/closing of the disconnecting switch body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198577.9U CN211062638U (en) | 2019-12-10 | 2019-12-10 | Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198577.9U CN211062638U (en) | 2019-12-10 | 2019-12-10 | Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation |
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| Publication Number | Publication Date |
|---|---|
| CN211062638U true CN211062638U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922198577.9U Active CN211062638U (en) | 2019-12-10 | 2019-12-10 | Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation |
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| CN (1) | CN211062638U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110931303A (en) * | 2019-12-10 | 2020-03-27 | 中国长江电力股份有限公司 | Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation |
-
2019
- 2019-12-10 CN CN201922198577.9U patent/CN211062638U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110931303A (en) * | 2019-12-10 | 2020-03-27 | 中国长江电力股份有限公司 | Position contact point forming device for preventing three-phase linkage type isolating switch from non-full-phase operation |
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