CN112550355B - Stroke-adjustable contact base for point switch - Google Patents
Stroke-adjustable contact base for point switch Download PDFInfo
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- CN112550355B CN112550355B CN202011513033.8A CN202011513033A CN112550355B CN 112550355 B CN112550355 B CN 112550355B CN 202011513033 A CN202011513033 A CN 202011513033A CN 112550355 B CN112550355 B CN 112550355B
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- node
- seat
- stroke
- screw rod
- adjusting screw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/10—Locking mechanisms for points; Means for indicating the setting of points
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- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a stroke-adjustable contact base for a point switch, which belongs to the technical field of railway traffic equipment and aims to solve the problems that the point switch in the prior art is generally in a fixed stroke, different engineering projects need the idle stroke of a point switch rod piece in a non-standard design to enable the point switch to be matched with different points, the customization of the connecting rod piece is time-consuming and labor-consuming, and the efficiency is low.
Description
Technical Field
The invention belongs to the technical field of railway traffic equipment, relates to a point switch conversion device, and particularly relates to a stroke-adjustable contact base for a point switch.
Background
In the current domestic rail transit industry, a point switch is used as key equipment for driving safety and is used for switching and locking turnouts. The conversion stroke of the turnout (traction stroke of the switch machine) is different due to factors such as road conditions, conversion directions, turning radii and the like.
However, the existing domestic switch machine is generally in a fixed stroke mode, different engineering projects need non-standard design of the lost motion stroke of the switch machine rod pieces to enable the switch machine to be matched with different turnouts, customized connection of the rod pieces is time-consuming and labor-consuming, and the efficiency is low.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems that a point switch is generally in a fixed stroke, different engineering projects need nonstandard design of idle stroke of a point switch rod piece to enable the point switch to be matched with different turnouts, and the customized connection of the rod piece is time-consuming and labor-consuming and low in efficiency.
In order to realize the purpose, the invention provides the following technical scheme: a stroke-adjustable contact base for a point switch comprises a left node base, a right node base and a node base fixing plate, wherein the left node base and the right node base are fixed on the node base fixing plate through bolts and are locked through nuts;
the left node base comprises a left node base main body, a movable node assembly, a static node group, a copper sleeve and a left locking block, wherein the static node group and the left locking block are both arranged on the left node base main body and are positioned at the same horizontal position, the movable node assembly is in sliding connection with the static node group, the movable node assembly is in rotating connection with the copper sleeve, and the left locking block is provided with scales of 40-80 mm;
the movable node assembly comprises a movable node oscillating bar (12), a movable node group (13), a representation column (17) and an inspection column assembly, the movable node group (13) is installed on the movable node oscillating bar (12), a main shaft of the movable node oscillating bar (12) is rotatably connected with a copper sleeve (15), the representation column (17) and the inspection column assembly are both hinged to the movable node group (13), and the representation column (17) and the inspection column assembly are both connected in a groove of the left node base main body (11) in a sliding mode and extend to the outside of the left node base main body (11);
the inspection column assembly comprises an inspection column (18) and a quick-acting spring (16), wherein one end, far away from the inspection column (18), of the quick-acting spring (16) is embedded in the left node seat main body (11), and one end, close to the inspection column (18), of the quick-acting spring (16) is fixedly arranged at the tail end of the inspection column (18).
By adopting the technical scheme, the left node seat and the right node seat are fixed on the node seat fixing plate through bolts and are locked through nuts, the left node seat and the right node seat are connected with the adjusting screw rod through body threads, two ends of the adjusting screw rod are fixed on the screw rod seat, the screw rod seat is fixedly connected on the shell of the point switch machine, when the stroke of the node seat needs to be adjusted, the nuts of the bolts are loosened, the compression bolts on the fixed screw rod seat are also loosened, the outer hexagonal structure in the middle of the adjusting screw rod is screwed by a spanner, the stroke of the point switch machine can be adjusted by adjusting the adjusting screw rod, the contact seat can be integrally installed in the point switch machine, the point switch point rail is locked by matching with other structures of the point switch machine, the position state of the point switch rail is reflected, and in addition, the fixed node group, the copper bush and the left locking block are all installed on the left node seat main body, the movable node assembly is rotatably connected with the copper bush, when the adjusting screw rod is adjusted by a tool, the stroke of the point switch in a stroke range of 40-80 mm can be adjusted by adjusting the adjusting screw rod, moreover, the left locking block is provided with a scale display of 40-80 mm, the stroke adjustment quantity can be accurately fed back, the stroke adjustment quantity can be more intuitively seen, the accuracy of an adjustment result is ensured, when a starting mechanism of the point switch moves to a certain position, the movable node assembly rotates in the copper bush along with the movable node assembly, the movable node assembly completes reversing, the accurate indication of the change completion of a turnout opening is made, and the power failure of a control system is controlled, so that the turnout switch point is locked and the position state of the turnout point is reflected. Move the node group and install on moving the node pendulum rod, furthermore, the main shaft and the copper sheathing rotation of moving the node pendulum rod are connected, show post and inspection column subassembly all articulate on moving the node group, show the equal sliding connection of post and inspection column subassembly in the recess of node seat main part, and extend to the outside of node seat main part, when the actuating mechanism of goat moved a certain position, show post and inspection column can be at the interior linear motion of the recess of left node seat main part, along with move the node group at the copper sheathing internal rotation, move the switching-over of contact group completion, make the accurate of switch opening change completion show and control system outage, thereby realize locking switch rail and reflect switch rail position state. When the starting mechanism of the point switch moves to a proper position, the inspection column and the indication column are quickly popped out through the quick-acting spring and are respectively driven into the notch of the indication rod and the notch of the quick-acting piece, the inspection column and the indication column are more easily and timely popped out under the elastic force action of the quick-acting spring due to the arrangement of the quick-acting spring, so that the direction change of the point node group is quickly completed, the accurate indication of the change completion of the opening of the point switch is made, the system is controlled to be powered off, and the switch point rail is locked and the position state of the point rail of the point switch is reflected.
The invention is further configured to: the adjusting screw rod is provided with a first spiral thread at the contact position with the left node seat, and is provided with a second spiral thread at the contact position with the right node seat, and the directions of the first spiral thread and the second spiral thread are opposite.
Through adopting above-mentioned technical scheme, when the stroke of needs regulation node seat, because adjusting screw sets up at the contact site with left node seat and has revolved screw thread one, adjusting screw sets up at the contact site with right node seat and has revolved screw thread two, furthermore, adjusting screw is the symmetrical formula structure, revolve screw thread one and revolve screw thread two opposite direction, use tool adjusts the operation to adjusting screw's middle outer hexagonal structure, can realize the synchronization control of left node seat and right node seat, ensure the convenience and the maneuverability of regulation, the accuracy of stroke adjustment has been guaranteed.
The invention is further configured to: the left node base main body is fixed with a protective cover on one side wall far away from the inspection column through a bolt.
Through adopting above-mentioned technical scheme, left side node seat main part has the protection casing through the bolt fastening on keeping away from the lateral wall of inspection post, and the setting of protection casing plays a guard action to left side node seat main part, moves node subassembly, quiet node group, copper sheathing and left locking piece, prevents that the short circuit from taking place and the manual mistake of people is touched, protects people's safety.
The invention is further configured to: the structure setting of right side node seat with the left side node seat is unanimous.
Through adopting above-mentioned technical scheme, left side node seat and right node seat identical structure set up, are convenient for realize the synchronization adjustment of left node seat and right node seat, ensure the convenience and the maneuverability of regulation stroke, have guaranteed the accuracy of stroke adjustment.
The invention is further configured to: the method for adjusting the stroke-adjustable contact seat for the point switch comprises the following steps:
(1) When the stroke is adjusted, the nut of the bolt is loosened, and the compression bolt on the screw rod seat is also loosened;
(2) Screwing an outer hexagonal structure in the middle of the adjusting screw rod by using a wrench, wherein the left side of the adjusting screw rod is provided with left-handed threads, the right side of the adjusting screw rod is provided with right-handed threads, the left-handed threads are used for shortening the stroke, and the right-handed threads are used for increasing the stroke;
(3) And observing the stroke scale on the left locking block, and selecting a stroke position to be adjusted according to the stroke of the switch machine, wherein for example, the scale of 40mm represents that the stroke of the switch machine is 40mm, so that the synchronous adjustment of the left node base and the right node base can be realized.
By adopting the technical scheme, when the stroke is adjusted, the nut of the bolt is loosened, and the compression bolt on the screw rod seat is also loosened; screwing (left-hand rotation is stroke reduction, right-hand rotation is stroke increase) by using a wrench to adjust an outer hexagonal structure in the middle of the screw rod, observing stroke scales on the left locking block (selecting a stroke position to be adjusted according to the stroke of the switch machine, for example, the scale is 40mm, namely, the stroke of the switch machine is 40 mm), wherein left-hand threads are arranged on the left side of the adjusting screw rod, and right-hand threads are arranged on the right side of the adjusting screw rod; the synchronous adjustment of the left node seat and the right node seat can be realized.
In conclusion, the invention has the following beneficial effects: the stroke-adjustable contact base for the point switch is simple in structure and reasonable in design, and comprises a left node base, a right node base and a node base fixing plate, wherein the left node base and the right node base are fixed on the node base fixing plate through bolts and are locked through nuts, the left node base and the right node base are connected with adjusting screws through body threads, the two ends of each adjusting screw are fixedly provided with screw bases, the screw bases are fixedly connected to a shell of the point switch, when the stroke of the node base needs to be adjusted, the nuts of the bolts are loosened, compression bolts on the fixed screw bases are also loosened, an outer hexagonal structure in the middle of each adjusting screw is screwed through a spanner, the stroke of the point switch can be adjusted through adjusting the adjusting screws, the contact base can be integrally installed in the point switch, and the point switch can be locked by matching with other structures of the point switch to reflect the position state of the point switch.
Drawings
FIG. 1 is a general schematic view of a preferred embodiment of a stroke-adjustable contact base for a switch machine according to the present invention;
fig. 2 is a schematic structural view of a left contact base of an adjustable stroke contact base for a switch machine according to a preferred embodiment of the present invention;
fig. 3 is a cross-sectional view of a preferred embodiment of the left contact base of the stroke-adjustable contact base for a switch machine according to the invention.
The reference signs are:
1. a left node mount; 2. a right node base; 3. adjusting the screw rod; 4. a node base fixing plate; 5. a screw seat; 6. a bolt; 11. a left node base body; 12. a movable node oscillating bar; 13. a mobile node group; 14. a group of quiet nodes; 15. a copper sleeve; 16. a snap spring; 17. represents a column; 18. inspecting the column; 19. a left locking block; 110. a shield.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples. The following examples are intended only to provide a possible solution and are not intended to limit the invention.
The utility model provides an adjustable contact seat of stroke for goat, as shown in figure 1, including left node seat 1, right node seat 2, and node seat fixed plate 4, wherein, left side node seat 1 and right node seat 2 pass through bolt 6 to be fixed on node seat fixed plate 4, and through nut locking, left side node seat 1 and right node seat 2 have adjusting screw 3 through body threaded connection, adjusting screw 3's both ends are fixed with screw seat 5, 5 rigid couplings of screw seat are on the goat casing, more importantly, adjusting screw 3 sets up screw thread one at the contact position with left node seat 1, adjusting screw 3 sets up screw thread two at the contact position with right node seat 2, screw thread one and screw thread two's opposite direction.
This contact seat is used for the integral mounting inside the goat, other structures of cooperation goat realize locking switch point rail, reflect switch point rail position state, when the stroke of node seat needs to be adjusted, loosen the nut of bolt 6, the clamp bolt on the screw rod seat 5 also loosens, twist the outer hexagonal structure in the middle of adjusting screw 3 with the spanner, through adjusting screw 3, the stroke that can realize the goat is adjustable, because adjusting screw 3 sets up spiral thread one in the contact position with left node seat 1, adjusting screw 3 sets up spiral thread two in the contact position with right node seat 2, and, adjusting screw 3 is symmetrical formula structure, the opposite direction of spiral thread one and spiral thread two, can realize the synchronization regulation of left node seat 1 and right node seat 2, ensure the convenience and the maneuverability of regulation, the accuracy of stroke adjustment has been guaranteed.
As shown in fig. 2 and 3, the left node base 1 includes a left node base main body 11, a movable node assembly, a static node group 14, a copper bush 15 and a left locking block 19, wherein the static node group 14 and the left locking block 19 are both installed on the left node base main body 11, the static node group 14 and the left locking block 19 are located at the same horizontal position, the movable node assembly is slidably connected with the static node group 14, and the movable node assembly is rotatably connected with the copper bush 15. Further, move the node subassembly including moving node pendulum rod 12, move node group 13, show post 17 and inspection column subassembly, wherein, move node group 13 and install on moving node pendulum rod 12, move the main shaft and the copper sheathing 15 of node pendulum rod 12 and rotate and be connected, show that post 17 and inspection column subassembly all articulate on moving node group 13, show that post 17 and inspection column subassembly all sliding connection are in the recess of node seat main part 11, and extend to the outside of node seat main part 11. Moreover, the inspection column assembly comprises an inspection column 18 and a quick-acting spring 16, wherein the quick-acting spring 16 is embedded in the left node seat main body 11 at one end far away from the inspection column 18, and the quick-acting spring 16 is fixedly arranged at the tail end of the inspection column 18 at one end close to the inspection column 18.
When the adjusting screw rod 3 is adjusted by using a tool, the stroke of the switch machine in the range of 40 mm-80 mm can be adjusted by adjusting the adjusting screw rod 3, the left locking block 19 is provided with scale display of 40 mm-80 mm, the stroke adjustment amount can be accurately fed back, the stroke adjustment amount can be more intuitively seen, the accuracy of an adjustment result is ensured, when a starting mechanism of the switch machine moves to a certain position, the inspection column 18 and the indication column 17 are quickly popped out through the quick-acting spring 16, the indication column 17 and the inspection column 18 do linear motion in a groove of the left node seat main body 11 and are respectively driven into a notch of the indication rod and a notch of the quick-acting piece, the movable node group 13 rotates in the copper sleeve 15, the movable node group 13 completes reversing, accurate indication of the change of the turnout opening and controls the system to be powered off, so as to realize locking of the switch rail and reflect the position state of the turnout point rail, the quick-acting spring 16 enables the inspection column 18 and the indication column 17 to be more easily under the elastic action of the quick-acting spring 16, and the universal turnout connection part is designed to improve the zero-point connection.
As shown in fig. 2, a protective cover 110 is fixed to a side wall of the left node base main body 11 away from the inspection column 18 by bolts, and as shown in fig. 1, the left node base 1 and the right node base 2 are consistent in structural arrangement. Referring to fig. 3, the protective cover 110 is provided to protect the left node base body 11, the movable node assembly, the stationary node group 14, the copper bush 15 and the left locking block 19 from short circuit and manual error touch, and the left node base 1 and the right node base 2 have the same structure, so that the synchronous adjustment of the left node base 1 and the right node base 2 is facilitated, the convenience and operability of stroke adjustment are ensured, and the accuracy of stroke adjustment is ensured.
The working principle of the stroke-adjustable contact seat for the point switch is as follows:
when the switch machine is in a power-on state, the action rod mechanism of the switch machine starts to move, and when the action rod pulls the switch point rail to change the opening direction of the switch, the point rail drives the indicating rod mechanism to transversely move, and the indicating notch on the indicating rod moves to a corresponding position to be indicated; meanwhile, a starting mechanism of the action rod pulls the quick acting piece to move, when the starting mechanism is overlapped with a notch of the quick acting piece and reaches a position, the inspection column 18 and the indication column 17 are quickly popped out and are respectively driven into the notch of the indication rod and the notch of the quick acting piece, the movable node group 13 finishes reversing, accurate indication of turnout opening change completion is made, and the system is controlled to be powered off, so that the turnout switch rail is locked and the position state of the turnout switch rail is reflected.
The stroke synchronous adjustable working principle of the stroke adjustable contact seat for the point switch comprises the following steps:
left side node seat 1 and right node seat 2 are fixed on node seat fixed plate 4 by bolt 6, and lock with the nut, and left side node seat 1 and right node seat 2 link together with adjusting screw 3 through the screw thread of body simultaneously, and adjusting screw 3 is fixed on screw rod seat 5. When the stroke is adjusted, the nut of the bolt 6 is loosened, the compression bolt on the screw rod seat 5 is also loosened, the wrench is used for screwing (the left hand is used for reducing the stroke, and the right hand is used for increasing the stroke) to adjust the outer hexagonal structure in the middle of the screw rod 3, meanwhile, the stroke scale on the left locking block 19 is observed (the stroke position to be adjusted is selected according to the stroke of the switch machine, for example, the scale is 40mm, the stroke of the switch machine is 40mm, the left side of the adjustment screw rod 3 is provided with left-hand threads, and the right side of the adjustment screw rod is provided with right-hand threads, so that the synchronous adjustment of the left node seat 1 and the right node seat 2 can be realized.
The above are only preferred embodiments of the present invention, which are intended to show the outstanding technical effects and advantages of the present invention, and are not intended to limit the technical solutions of the present invention. It should be understood by those skilled in the art that all modifications, changes or alternative technical features made based on the technical contents of the present invention should be included in the technical scope of the appended claims.
Claims (5)
1. The utility model provides an adjustable contact seat of trip for goat, includes left node seat (1), right node seat (2) and node seat fixed plate (4), left side node seat (1) and right node seat (2) are fixed on node seat fixed plate (4) through bolt (6) to through nut locking, its characterized in that: the left node seat (1) and the right node seat (2) are connected with an adjusting screw rod (3) through body threads, two ends of the adjusting screw rod (3) are fixedly provided with screw rod seats (5), and the screw rod seats (5) are fixedly connected to a switch machine shell;
the left node base (1) comprises a left node base main body (11), a movable node component, a static node group (14), a copper sleeve (15) and a left locking block (19), wherein the static node group (14) and the left locking block (19) are both installed on the left node base main body (11), the static node group (14) and the left locking block (19) are located at the same horizontal position, the movable node component is connected with the static node group (14) in a sliding mode, the movable node component is connected with the copper sleeve (15) in a rotating mode, and scales of 40-80 mm are arranged on the left locking block (19);
the movable node assembly comprises a movable node oscillating bar (12), a movable node group (13), a representation column (17) and an inspection column assembly, the movable node group (13) is installed on the movable node oscillating bar (12), a main shaft of the movable node oscillating bar (12) is rotatably connected with a copper sleeve (15), the representation column (17) and the inspection column assembly are both hinged on the movable node group (13), and the representation column (17) and the inspection column assembly are both connected in a groove of the left node base main body (11) in a sliding mode and extend to the outside of the left node base main body (11);
the inspection column assembly comprises an inspection column (18) and a quick-acting spring (16), wherein one end, far away from the inspection column (18), of the quick-acting spring (16) is embedded in the left node seat main body (11), and one end, close to the inspection column (18), of the quick-acting spring (16) is fixedly arranged at the tail end of the inspection column (18).
2. The adjustable stroke joint base for a switch machine as claimed in claim 1, wherein: the adjusting screw rod (3) is provided with a first spiral thread at the contact position with the left node seat (1), the adjusting screw rod (3) is provided with a second spiral thread at the contact position with the right node seat (2), and the directions of the first spiral thread and the second spiral thread are opposite.
3. The adjustable stroke joint base for a switch machine as claimed in claim 1, wherein: the protective cover (110) is fixed on one side wall of the left node base main body (11) far away from the inspection column (18) through bolts.
4. The adjustable stroke joint base for a switch machine as claimed in claim 1, wherein: the right node seat (2) and the left node seat (1) are consistent in structural arrangement.
5. A method of adjusting a stroke-adjustable contact block for a switch machine, according to any of claims 1 to 4, comprising the steps of:
(1) When the stroke is adjusted, the nut of the bolt (6) is loosened, and the compression bolt on the screw rod seat (5) is also loosened;
screwing an outer hexagonal structure in the middle of the adjusting screw rod (3) by using a wrench, wherein the left side of the adjusting screw rod (3) is provided with left-handed threads, the right side of the adjusting screw rod (3) is provided with right-handed threads, the left-handed threads of the adjusting screw rod (3) are reduced in stroke, and the right-handed threads of the adjusting screw rod (3) are increased in stroke;
and observing stroke scales on the left locking block (19), selecting a stroke position to be adjusted according to the stroke of the switch machine, wherein the scale of 40mm represents that the stroke of the switch machine is 40mm, and thus synchronous adjustment of the left node seat (1) and the right node seat (2) can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011513033.8A CN112550355B (en) | 2020-12-20 | 2020-12-20 | Stroke-adjustable contact base for point switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011513033.8A CN112550355B (en) | 2020-12-20 | 2020-12-20 | Stroke-adjustable contact base for point switch |
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| Publication Number | Publication Date |
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| CN112550355A CN112550355A (en) | 2021-03-26 |
| CN112550355B true CN112550355B (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011513033.8A Active CN112550355B (en) | 2020-12-20 | 2020-12-20 | Stroke-adjustable contact base for point switch |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179855A (en) * | 2021-12-09 | 2022-03-15 | 通号万全信号设备有限公司 | Novel adjustable contact seat of monorail train goat stroke |
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| CN2313804Y (en) * | 1997-11-05 | 1999-04-14 | 西门子信号有限公司 | Aligner inspector |
| WO2008110078A1 (en) * | 2007-03-15 | 2008-09-18 | Siemens Signalling Corporation Ltd. | A lock detecting equipment and a detector comprising the same |
| CN111891180A (en) * | 2020-09-01 | 2020-11-06 | 太原市京丰铁路电务器材制造有限公司 | Travel adjusting mechanism for switch machine and locking rod and indicating rod comprising same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE506183C2 (en) * | 1993-05-27 | 1997-11-17 | Abb Daimler Benz Transp | Device at railroad tracks for the change of track gear |
| CN104029696B (en) * | 2013-11-12 | 2016-08-17 | 西安铁路信号有限责任公司 | A kind of point machine |
| CN204210492U (en) * | 2014-11-27 | 2015-03-18 | 天津铁路信号有限责任公司 | The two bar switch machine switch circuit controller of a kind of double slip switch |
| AT516495B1 (en) * | 2014-11-28 | 2016-06-15 | Voestalpine Signaling Zeltweg Gmbh | Device for end position testing of moving parts of a rail switch |
| CN208233074U (en) * | 2018-02-09 | 2018-12-14 | 天津铁路信号有限责任公司 | It is a kind of to facilitate the disconnected structure indicated of adjustment contact group |
| CN109436026A (en) * | 2018-09-03 | 2019-03-08 | 通号万全信号设备有限公司 | A kind of buried Integral type electrohydraulic goat |
| CN111605579A (en) * | 2020-06-23 | 2020-09-01 | 天津铁路信号有限责任公司 | Contact seat for electric switch machine |
| CN111791917A (en) * | 2020-07-08 | 2020-10-20 | 西安铁路信号有限责任公司 | Switch equipment and method suitable for tramcar turnout |
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2020
- 2020-12-20 CN CN202011513033.8A patent/CN112550355B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2313804Y (en) * | 1997-11-05 | 1999-04-14 | 西门子信号有限公司 | Aligner inspector |
| WO2008110078A1 (en) * | 2007-03-15 | 2008-09-18 | Siemens Signalling Corporation Ltd. | A lock detecting equipment and a detector comprising the same |
| CN111891180A (en) * | 2020-09-01 | 2020-11-06 | 太原市京丰铁路电务器材制造有限公司 | Travel adjusting mechanism for switch machine and locking rod and indicating rod comprising same |
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| CN112550355A (en) | 2021-03-26 |
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