CN209169087U - One kind being electric-only propulsion formula feeding switch - Google Patents
One kind being electric-only propulsion formula feeding switch Download PDFInfo
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- CN209169087U CN209169087U CN201821959553.XU CN201821959553U CN209169087U CN 209169087 U CN209169087 U CN 209169087U CN 201821959553 U CN201821959553 U CN 201821959553U CN 209169087 U CN209169087 U CN 209169087U
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses one kind and is electric-only propulsion formula feeding switch, is manually pulled out and promotes for solving the problems, such as that existing feeding switch mostly uses greatly；Including major loop, control loop, comprehensive protection device, driver, servo motor, breaker and feeding switch ontology；This case just drives lead screw with the bottom plate of breaker is carried with servo motor to control being contacting and separating for dynamic and static socket；Before combined floodgate, automatically breaker the moving contact on socket is moved to be advanced at the plug connector of static socket, it is reliably connected, then the normal power supply work fed, when carrying out underground maintenance, it only need to be after feed separating brake, automatically breaker is moved the plug connector that the moving contact on socket pulls out static socket, power input, output are reliably isolated, increase the safety coefficient of shaft production, it in the case that feed is in no electricity, is electric-only propulsion at this time and when pull-out is not available, can be used can be manually rotated rotating handle and promoted and pulled out.
Description
Technical field
The utility model relates to feeding switch, in particular one kind is electric-only propulsion formula feeding switch.
Background technique
Currently, the mode that breaker used in low-voltage feeder switch is mostly directly fixed, breaker input and output are
Cable connection, after feeding switch separating brake, the isolation of input and output relies solely on vacuum tube and is isolated, and has a small number of feeding switch
Although breaker is isolated with input and output, but mostly use and manually advance, and when breaker, which powers off, to be overhauled, need to manually be drawn
Out and promote.
Utility model content
In order to solve the above technical problems, formula feed is electric-only propulsion the purpose of this utility model is to provide one kind to open
It closes, is manually pulled out and promotes for solving the problems, such as that existing feeding switch mostly uses greatly.
The purpose of this utility model can be achieved through the following technical solutions: one kind being electric-only propulsion formula feeding switch, including
Major loop, control loop, comprehensive protection device, driver, servo motor, breaker and feeding switch ontology, the major loop packet
Include source side binding post U1, source side binding post V1 and source side binding post W1, source side binding post U1, source side binding post V1
The side of vacuum circuit breaker ZD is connected with one end of source side binding post W1, the other side of vacuum circuit breaker ZD is connected with electric current
The side of mutual inductor LH, the side of current transformer LH are connected with load side lug column U2, load side lug column V2 and load-side
Binding post W2；It is in series with the anti-electric appliance SK's of three-phase on load side lug column U2, load side lug column V2 and load side lug column W2
One end, the end UA, UB, UC on the anti-electric appliance SK of three-phase are connect with the end UA, UB, UC on comprehensive protection device respectively；
The control loop includes change-over switch HK and control transformer CT；Source side binding post V1 and source side binding post
The side of change-over switch HK is connected on W1, is connected with control transformer CT's after the other side inline fuse F1 of change-over switch HK
First siding ring；The second siding ring of control transformer CT is connected with one end of fuse F2 and fuse F3；Fuse F2's
The other end is connected with one end of intermediate relay KA and full-bridge rectification heap UR2, and the other end of intermediate relay KA is connected with hilted broadsword
One end of commutator K1, the other end of single-pole double-throw switch (SPDT) K1 are connected with one end of button SB1, and the both ends of button SB1 are in parallel
Have a switch DO2, the button SB1 other end is connected with one end of relay contact KT-1, the other end of relay contact KT-1 with after
One end of appliance contact KA-1 and on the second siding ring of control transformer CT, relay contact KA-1's is another for access after connecing
It is connected with full-bridge rectification heap UR2 after the series relay contact KA-2 of end, is parallel with closing coil HT on full-bridge rectification heap UR2；
The other end of the fuse F3 is connected with one end of full-bridge rectification heap UR1, one end connection of full-bridge rectification heap UR1
The other end of one end of having time relay KT, capacitor C1, under-voltage coil QY, separate winding FL, under-voltage coil QY is connected with electricity
Hold the other end of C1 and one end of diode VD1, the other end of diode VD1 is connected with protection output point BJ, breaker auxiliary
One end of contact ZD-F2, protection output point BJ and button SB2, one end of switch DO1 and access full-bridge rectification heap UR1 after connecing
The other end of one end, auxiliary contacts of circuit breaker ZD-F2 is connect with the other end of time relay KT, and the other end of button SB2 connects
It is connected to one end of auxiliary contacts of circuit breaker ZD-F1, the other end of switch DO1, the other end connection of auxiliary contacts of circuit breaker ZD-F1
There is the separate winding FL other end；
49 feet of the comprehensive protection device and 49 feet of driver connect, 51 feet of comprehensive protection device and 51 feet of driver
Connection, 34 end of coil, 30 end of coil of control transformer CT second level side are connect with 34 feet, 30 feet on comprehensive protection device respectively；
86,87,88,89 feet on driver are connect with 86,87,88,89 binding posts of servo motor respectively；8 feet of comprehensive protection device,
15 foot parallel connection limit switches S1, limit switch S2；8 feet of comprehensive protection device, 12 foot parallel connection limit switches S3, limit switch
S4；8 feet, 9 feet of comprehensive protection device, which are parallel with, promotes button SB9；8 feet, 10 feet of comprehensive protection device are parallel with pull-out button
SB10。
As a further solution of the present invention: the feeding switch ontology includes cabinet, offered at the top of cabinet
First cavity and the second cavity, the front side wall of cabinet are equipped with chamber door, are equipped on chamber door and promote button SB9 and pull-out button
SB10, the left side wall of cabinet offer round observation window；
The inside of cabinet is equipped with screw slide, and screw slide includes L-type pedestal, and the rear wall of L-type pedestal is equipped with quiet
The upper surface of socket, L-type pedestal is equipped with servo motor by screw, and the spindle end of servo motor is connected with silk by connecting shaft
Thick stick, screw thread is socketed with sliding block on lead screw, and the upper surface of sliding block, which is screwed, is equipped with bottom plate, one end end point weldering of lead screw
It is connected to rotating handle；
The upper surface of bottom plate is equipped with breaker by screw, and dynamic socket is equipped on breaker, moves socket and static socket
It is used cooperatively.
As a further solution of the present invention: the drive model is FWJX70-5700
The utility model has the beneficial effects that (1) vacuum circuit breaker ZD and source side binding post U1, V1, W1 are inserted by dynamic and static
Seat connection, while the breaker other side is connect with load side lug column U2, V2, W3 by sound socket, when feeding switch open circuit
When device pulls out, breaker and source side binding post U1, V1, W1 are completely isolated, same breaker and load side lug column U2, V2,
W3 is also entirely isolated, at this point, load-side can guarantee absolute safety when source side binding post has 1140V power supply；
(2) servo motor accesses driver, and the positive and negative rotation and starting that servo motor is controlled by comprehensive protection device stop behaviour
Make；When needing to promote, servo motor is rotated forward, while lead screw being driven to be rotated, and lead screw band movable slider and bottom plate are toward leaning on
The direction of nearly servo motor promotes, and sliding block and bottom plate drive breaker and dynamic socket slowly to push away the direction toward static socket at this time,
When dynamic socket and static socket reliable contacts；It automatically controls servo motor by limit switch to stop rotating forward, servo motor stops
Only, the progradation of breaker is completed；When needing to extract out, servo motor is inverted, while lead screw being driven to be rotated,
Lead screw is moved with movable slider and bottom plate toward the direction far from servo motor, and sliding block and bottom plate drive breaker and dynamic socket at this time
It slowly moves toward the direction far from static socket, when dynamic socket and static socket reliable separation, is automatically controlled by limit switch
Servo motor stops reversion, and servo motor stops, and completes the extraction process of breaker；
(3) it can see the reliability of the dynamic and static female contact of circuit breaker internal by observing round observation window, can understand and see
Observe moving and the contact situation of dynamic and static socket for the dynamic and static socket of circuit breaker internal；
(4) lead screw rotation is driven by rotating handle, in the case that feed is in no electricity, is electric-only propulsion and pulls out at this time
When not being available, can be used can be manually rotated rotating handle and is promoted and pulled out.
Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is the utility model principle block diagram.
Fig. 2 is the utility model main loop circuit figure.
Fig. 3 is the utility model comprehensive protection device circuit diagram.
Fig. 4 is that the utility model driver with servo motor connect circuit diagram.
Fig. 5 is the utility model breaker circuit figure.
Fig. 6 is the utility model limit switch circuit figure.
Fig. 7 is the utility model feeding switch ontology overall structure diagram.
Fig. 8 is the utility model feeding switch ontology right view.
Fig. 9 is the utility model screw slide overall structure diagram.
Figure 10 is the utility model breaker overall structure diagram.
Figure 11 is the utility model feeding switch ontology main view.
Figure 12 is the utility model feeding switch ontology left view.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
All other embodiment obtained, fall within the protection scope of the utility model.
It please refers to shown in Fig. 1-6, the utility model is that one kind is electric-only propulsion formula feeding switch, including major loop, controls back
Road, comprehensive protection device, driver, servo motor, breaker and feeding switch ontology, which is characterized in that major loop includes power supply
Flank terminal U1, source side binding post V1 and source side binding post W1, source side binding post U1, source side binding post V1 and power supply
The one end for flanking terminal W1 is connected with the side of vacuum circuit breaker ZD, and the other side of vacuum circuit breaker ZD is connected with current transformer
The side of LH, the side of current transformer LH are connected with load side lug column U2, load side lug column V2 and load side lug column
W2；It is in series with one end of the anti-electric appliance SK of three-phase on load side lug column U2, load side lug column V2 and load side lug column W2, three
The end UA, UB, UC on mutually anti-electric appliance SK is connect with the end UA, UB, UC on comprehensive protection device respectively；Vacuum circuit breaker ZD and power supply
It flanks terminal U1, V1, W1 to connect by dynamic and static socket, while 3 other side of breaker passes through with load side lug column U2, V2, W3
The connection of sound socket, when feeding switch breaker pulls out, breaker 3 and source side binding post U1, V1, W1 are completely isolated, together
Sample breaker 3 is also entirely isolated with load side lug column U2, V2, W3, at this point, when source side binding post has 1140V power supply,
Load-side can guarantee absolute safety；
Control loop includes change-over switch HK and control transformer CT；On source side binding post V1 and source side binding post W1
The side of change-over switch HK is connected, the primary of control transformer CT is connected with after the other side inline fuse F1 of change-over switch HK
Lateral coil；The second siding ring of control transformer CT is connected with one end of fuse F2 and fuse F3；Fuse F2's is another
End is connected with one end of intermediate relay KA and full-bridge rectification heap UR2, and the other end of intermediate relay KA is connected with single-pole double throw
One end of switch K1, the other end of single-pole double-throw switch (SPDT) K1 are connected with one end of button SB1, and the both ends of button SB1 are parallel with out
DO2 is closed, the button SB1 other end is connected with one end of relay contact KT-1, the other end and relay of relay contact KT-1
One end of contact KA-1 and access is on the second siding ring of control transformer CT after connecing, the other end string of relay contact KA-1
It is connected with full-bridge rectification heap UR2 after connection relay contact KA-2, is parallel with closing coil HT on full-bridge rectification heap UR2；
The other end of fuse F3 is connected with one end of full-bridge rectification heap UR1, when one end of full-bridge rectification heap UR1 is connected with
Between relay KT, capacitor C1, under-voltage coil QY, separate winding FL one end, the other end of under-voltage coil QY is connected with capacitor C1
The other end and diode VD1 one end, the other end of diode VD1 be connected with protection output point BJ, auxiliary contacts of circuit breaker
One end of ZD-F2, protection output point BJ and button SB2, one end of switch DO1 and after connecing access full-bridge rectification heap UR1 one end,
The other end of auxiliary contacts of circuit breaker ZD-F2 is connect with the other end of time relay KT, and the other end of button SB2 is connected with disconnected
One end of road device auxiliary contact ZD-F1, switch DO1 the other end, the other end of auxiliary contacts of circuit breaker ZD-F1 is connected with separation
The coil FL other end；
49 feet of comprehensive protection device and 49 feet of driver connect, and 51 feet of comprehensive protection device and 51 feet of driver connect
It connects, 34 end of coil, 30 end of coil of control transformer CT second level side are connect with 34 feet, 30 feet on comprehensive protection device respectively；It drives
86,87,88,89 feet on dynamic device are connect with 86,87,88,89 binding posts of servo motor respectively；8 feet of comprehensive protection device, 15
Foot parallel connection limit switches S1, limit switch S2；8 feet of comprehensive protection device, 12 foot parallel connection limit switches S3, limit switch
S4；8 feet, 9 feet of comprehensive protection device, which are parallel with, promotes button SB9；8 feet, 10 feet of comprehensive protection device are parallel with pull-out button
SB10；49 feet and 50 feet on comprehensive protection device are closed, and 51 feet and 52 feet disconnect, and servo motor 23 rotates forward；On comprehensive protection device
49 feet and 50 feet be closed, 51 feet and 52 feet are closed, the reversion of servo motor 23；49 feet and 50 feet on comprehensive protection device disconnect,
Servo motor 23 stops；
It please refers to shown in Fig. 7-12, feeding switch ontology includes cabinet 1, and the top of cabinet 1 offers 11 He of the first cavity
Second cavity 12, the front side wall of cabinet 1 are equipped with chamber door 13, are equipped on chamber door 13 and promote button SB9 and pull-out button SB10, case
The left side wall of body 1 offers round observation window 14；First cavity 11 and the second cavity 12 is respectively used to source side and load flanks
Line；Using the double cavity structure of the first cavity 11 and the second cavity 12, separate source side with load-side, when breaker pulls out,
Ensure being perfectly safe for load-side；By observe round observation window 14 it can be seen that the 3 dynamic and static female contact in inside of breaker can
It, can clear view moving and the contact situation of dynamic and static socket to the 3 dynamic and static socket in inside of breaker by property；
The inside of cabinet 1 is equipped with screw slide 2, and screw slide 2 includes L-type pedestal 21, and the rear wall of L-type pedestal 21 is pacified
Equipped with static socket 22, the upper surface of L-type pedestal 21 is equipped with servo motor 23 by screw, and the spindle end of servo motor 23 passes through
Connecting shaft is connected with lead screw 24, and screw thread is socketed with sliding block 25 on lead screw 24, and the upper surface of sliding block 25, which is screwed, to be equipped with
One end end point of bottom plate 26, lead screw 24 is welded with rotating handle 27；It drives lead screw 24 to rotate by rotating handle 27, works as feed
It in the case where no electricity, is electric-only propulsion at this time and when pull-out is not available, can be used can be manually rotated rotating handle 27 and pushed away
Into and pull out；
The upper surface of bottom plate 26 is equipped with breaker 3 by screw, and dynamic socket 31 is equipped on breaker 3, moves socket 31
It is used cooperatively with static socket 22.
Drive model is FWJX70-5700；Control transformer primary side voltage is 1140/660V；Control transformer two
Secondary side voltage is 240/150/36/10V
Working principle: vacuum circuit breaker ZD is connect with source side binding post U1, V1, W1 by dynamic and static socket, while open circuit
3 other side of device is connect with load side lug column U2, V2, W3 by sound socket, when feeding switch breaker pulls out, breaker
3 is completely isolated with source side binding post U1, V1, W1, same breaker 3 and load side lug column U2, V2, W3 be also completely every
From at this point, load-side can guarantee absolute safety when source side binding post has 1140V power supply；
Servo motor 23 accesses driver, and the positive and negative rotation and starting that servo motor 23 is controlled by comprehensive protection device stop behaviour
Make；When needing to promote, servo motor 23 is rotated forward, while lead screw 24 being driven to be rotated, lead screw 24 with movable slider 25 and
Bottom plate 26 is promoted toward the direction close to servo motor 23, and sliding block 25 and bottom plate 26 drive breaker 3 and dynamic socket 31 slow at this time
Slowly the direction toward static socket 22 is pushed away, when dynamic socket 31 is with 22 reliable contacts of static socket；It is watched by limit switch to automatically control
It takes motor 23 to stop rotating forward, servo motor 23 stops, and completes the progradation of breaker 3；When needing to extract out, servo motor
23 are inverted, while lead screw 24 being driven to be rotated, and lead screw 24 is with the past separate servo motor 23 of movable slider 25 and bottom plate 26
Direction movement, sliding block 25 and bottom plate 26 drive breaker and dynamic socket 31 slowly to transport toward the direction far from static socket 22 at this time
It is dynamic, when dynamic socket 31 is with 22 reliable separation of static socket, servo motor 23 is automatically controlled by limit switch and stops reversion, is watched
The stopping of motor 23 is taken, the extraction process of breaker 3 is completed.
Above content is only to the utility model structure example and explanation, the technology people of affiliated the art
Member makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from reality
With novel structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (3)
1. one kind is electric-only propulsion formula feeding switch, including major loop, control loop, comprehensive protection device, driver, servo motor,
Breaker and feeding switch ontology, which is characterized in that the major loop include source side binding post U1, source side binding post V1 and
One end of source side binding post W1, source side binding post U1, source side binding post V1 and source side binding post W1 are connected with vacuum
The side of breaker ZD, the other side of vacuum circuit breaker ZD are connected with the side of current transformer LH, and the one of current transformer LH
Side is connected with load side lug column U2, load side lug column V2 and load side lug column W2；Load side lug column U2, load flank
One end of the anti-electric appliance SK of three-phase is in series on terminal V2 and load side lug column W2, the end UA, UB, UC on the anti-electric appliance SK of three-phase point
It is not connect with the end UA, UB, UC on comprehensive protection device；
The control loop includes change-over switch HK and control transformer CT；On source side binding post V1 and source side binding post W1
The side of change-over switch HK is connected, the primary of control transformer CT is connected with after the other side inline fuse F1 of change-over switch HK
Lateral coil；The second siding ring of control transformer CT is connected with one end of fuse F2 and fuse F3；Fuse F2's is another
End is connected with one end of intermediate relay KA and full-bridge rectification heap UR2, and the other end of intermediate relay KA is connected with single-pole double throw
One end of switch K1, the other end of single-pole double-throw switch (SPDT) K1 are connected with one end of button SB1, and the both ends of button SB1 are parallel with out
DO2 is closed, the button SB1 other end is connected with one end of relay contact KT-1, the other end and relay of relay contact KT-1
One end of contact KA-1 and access is on the second siding ring of control transformer CT after connecing, the other end string of relay contact KA-1
It is connected with full-bridge rectification heap UR2 after connection relay contact KA-2, is parallel with closing coil HT on full-bridge rectification heap UR2；
The other end of the fuse F3 is connected with one end of full-bridge rectification heap UR1, when one end of full-bridge rectification heap UR1 is connected with
Between relay KT, capacitor C1, under-voltage coil QY, separate winding FL one end, the other end of under-voltage coil QY is connected with capacitor C1
The other end and diode VD1 one end, the other end of diode VD1 be connected with protection output point BJ, auxiliary contacts of circuit breaker
One end of ZD-F2, protection output point BJ and button SB2, one end of switch DO1 and after connecing access full-bridge rectification heap UR1 one end,
The other end of auxiliary contacts of circuit breaker ZD-F2 is connect with the other end of time relay KT, and the other end of button SB2 is connected with disconnected
One end of road device auxiliary contact ZD-F1, switch DO1 the other end, the other end of auxiliary contacts of circuit breaker ZD-F1 is connected with separation
The coil FL other end；
49 feet of the comprehensive protection device and 49 feet of driver connect, and 51 feet of comprehensive protection device and 51 feet of driver connect
It connects, 34 end of coil, 30 end of coil of control transformer CT second level side are connect with 34 feet, 30 feet on comprehensive protection device respectively；It drives
86,87,88,89 feet on dynamic device are connect with 86,87,88,89 binding posts of servo motor respectively；8 feet of comprehensive protection device, 15
Foot parallel connection limit switches S1, limit switch S2；8 feet of comprehensive protection device, 12 foot parallel connection limit switches S3, limit switch
S4；8 feet, 9 feet of comprehensive protection device, which are parallel with, promotes button SB9；8 feet, 10 feet of comprehensive protection device are parallel with pull-out button
SB10。
2. one kind according to claim 1 is electric-only propulsion formula feeding switch, which is characterized in that the feeding switch ontology packet
It includes cabinet (1), the first cavity (11) and the second cavity (12) is offered at the top of cabinet (1), the front side wall of cabinet (1) is equipped with case
Door (13) is equipped on chamber door (13) and promotes button SB9 and pull out button SB10, and the left side wall of cabinet (1) offers round sight
Examine window (14)；
The inside of cabinet (1) is equipped with screw slide (2), and screw slide (2) includes L-type pedestal (21), after L-type pedestal (21)
Side wall is equipped with static socket (22), and the upper surface of L-type pedestal (21) is equipped with servo motor (23), servo motor by screw
(23) spindle end is connected with lead screw (24) by connecting shaft, and screw thread is socketed with sliding block (25) on lead screw (24), sliding block (25)
Upper surface, which is screwed, to be equipped with bottom plate (26), and one end end point of lead screw (24) is welded with rotating handle (27)；
The upper surface of bottom plate (26) is equipped with breaker (3) by screw, and dynamic socket (31) are equipped on breaker (3), is moved and is inserted
Seat (31) is used cooperatively with static socket (22).
3. one kind according to claim 1 is electric-only propulsion formula feeding switch, which is characterized in that the drive model is
FWJX70-5700。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821959553.XU CN209169087U (en) | 2018-11-26 | 2018-11-26 | One kind being electric-only propulsion formula feeding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821959553.XU CN209169087U (en) | 2018-11-26 | 2018-11-26 | One kind being electric-only propulsion formula feeding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209169087U true CN209169087U (en) | 2019-07-26 |
Family
ID=67340263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821959553.XU Withdrawn - After Issue CN209169087U (en) | 2018-11-26 | 2018-11-26 | One kind being electric-only propulsion formula feeding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209169087U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360775A (en) * | 2018-11-26 | 2019-02-19 | 淮南万泰电子股份有限公司 | One kind being electric-only propulsion formula feeding switch |
-
2018
- 2018-11-26 CN CN201821959553.XU patent/CN209169087U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360775A (en) * | 2018-11-26 | 2019-02-19 | 淮南万泰电子股份有限公司 | One kind being electric-only propulsion formula feeding switch |
| CN109360775B (en) * | 2018-11-26 | 2024-02-27 | 淮南万泰电子股份有限公司 | Electric propulsion type feed switch |
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