CN109342454A - A kind of device for detecting insulating layer of crosslinked cable - Google Patents
A kind of device for detecting insulating layer of crosslinked cable Download PDFInfo
- Publication number
- CN109342454A CN109342454A CN201810909529.3A CN201810909529A CN109342454A CN 109342454 A CN109342454 A CN 109342454A CN 201810909529 A CN201810909529 A CN 201810909529A CN 109342454 A CN109342454 A CN 109342454A
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- Prior art keywords
- sleeve
- supporting plate
- screw
- fuel tank
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 57
- 239000002828 fuel tank Substances 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims 5
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003319 supportive effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 239000011243 crosslinked material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of device for detecting insulating layer of crosslinked cable, including support frame, bottom plate, the first supporting plate, heating fuel tank is provided among the plate upper surface, the heating fuel tank lower inside is provided with heating plate, first sleeve is provided at the upper side of the heating plate, the first housing screw is provided in the first sleeve, the heating fuel tank is provided with the first supporting plate close to the first sleeve side, first rotating shaft is provided between first supporting plate and the first sleeve, the first rotating shaft runs through the heating fuel tank.The present invention can replace human eye and detect to insulating layer, reduced workload, improve working efficiency by setting image acquisition device；By the way that rotary electric machine, first sleeve, second sleeve is arranged, crosslinked cable can be fixed and rotate detection；By the way that driving motor, lead screw is arranged, image acquisition device can be made to be moved automatically along crosslinked cable axial direction, detection is more comprehensive, more efficient.
Description
Technical field
The present invention relates to cross-linked cable insulating layer detection fields, detect and fill more particularly to a kind of cross-linked cable insulating layer
It sets.
Background technique
Crosslinked cable typically refers to the insulating layer of cable using cross-linked material, and most common material is crosslinked polyethylene, is handed over
Join cable suitable for power frequency ac voltage 500KV and electric line below, the high-tension cable overwhelming majority all uses at present
Crosslinked polyetylene insulated, the mechanism of crosslinking of insulating materials is to make insulating polymeric material by line using either physically or chemically
Property molecular structure is transformed into tridimensional network, becomes heat cured insulation material by thermoplastic material, to improve insulation material
The ageing-resistant performance of material, the ability of mechanical performance and resistance to environment, in existing technology, crosslinked cable in process of production, can go out
The defects of existing micropore, impurity, needs testing staff to carry out human eye detection before appearance, detects for a long time, it may appear that visual fatigue,
Working efficiency is lower, and working strength is higher.
Summary of the invention
The object of the invention is that providing a kind of device for detecting insulating layer of crosslinked cable to solve the above-mentioned problems.
The present invention through the following technical solutions to achieve the above objectives:
A kind of device for detecting insulating layer of crosslinked cable, including support frame, bottom plate, the first supporting plate are set among the plate upper surface
It is equipped with heating fuel tank, the heating fuel tank lower inside is provided with heating plate, is provided with first set at the upper side of the heating plate
Tin, the first housing screw is provided in the first sleeve, the heating fuel tank is arranged close to the first sleeve side
The first supporting plate is stated, first rotating shaft is provided between the first supporting plate and the first sleeve, the first rotating shaft runs through the heating
Fuel tank is provided with second sleeve far from the first sleeve side above the heating plate, and the is provided in the second sleeve
Two housing screws, the heating fuel tank are provided with the second supporting plate close to the second sleeve side, second supporting plate with it is described
The second shaft is provided between second sleeve, second shaft runs through the heating fuel tank, and second shaft passes through described
Second supporting plate end and rotary electric machine are coaxially connected, are provided with support frame as described above on the outside of first supporting plate and second supporting plate,
Support frame as described above inner upper is provided with lead screw, and wherein one end coaxially connects through support frame as described above with driving motor the lead screw
It connects, is provided with guide rod above the lead screw, sliding block is provided on the lead screw and the guide rod, the sliding block lower surface is set
It is equipped with electric lifting rod, the electric lifting rod lower end is provided with image acquisition device, and support frame as described above and the bottom plate weld, institute
It states lead screw and is connect with support frame as described above by bearing, the driving motor is connected by screw to support frame as described above, the driving
Motor is connect with the lead screw by shaft coupling, and the guide rod and support frame as described above weld, and the sliding block and the lead screw are logical
Threaded connection is crossed, the sliding block is slidably connected with the guide rod, and the electric lifting rod is connected by screw to the sliding block,
Described image collector is connected by screw to the electric lifting rod.
In above structure, crosslinked cable is sampled, will wherein be protruded into the first sleeve one end, and is tightened described
First housing screw, is fixed crosslinked cable, and crosslinked cable other end is protruded into the second sleeve, and twists
Tight second housing screw, is fixed, the heating plate starting, by adding to the conduction oil in the heating fuel tank
Heat, and then heat cross-linking cable, keep crosslinked cable more transparent, the driving motor starting, by the lead screw transmission, by institute
State one end that image acquisition device moves to crosslinked cable, the electric lifting rod starting, to described image collector adjust height into
Row focusing, is more clear it to the Image Acquisition of crosslinked cable, and described image collector extremely schemes the image transmitting after acquisition
As identification comparison system, judge whether crosslinked cable surface has a defect of the reduction insulation performance such as micropore, impurity, described turn
Dynamic electric motor starting drives crosslinked cable to be rotated by second shaft, enables described image collector to crosslinking electricity
The circumference of cable carries out Image Acquisition, and by the lead screw transmission, described image collector is moved for the driving motor starting
It is dynamic, it is finished until the image of the axial direction to crosslinked cable all acquires.
Further setting: the heating fuel tank is connected by screw to the bottom plate, the heating plate and heating oil
Case is connected by screw to.
So set, the heating plate is made by heating the conduction oil in the heating fuel tank, and then heat cross-linking cable
Crosslinked cable is more transparent, is convenient for Image Acquisition and comparison.
Further setting: first supporting plate and the bottom plate weld, and the first rotating shaft passes through with first supporting plate
Bearing connection, the first rotating shaft are connect with the heating fuel tank by bearing seal.
So set, making to seal and relatively rotate between the first rotating shaft and the heating fuel tank, oil leak and energy are prevented
Transmission.
Further setting: the first rotating shaft and the first sleeve are welded, first housing screw and described first
Sleeve is connected through a screw thread.
So set, the first rotating shaft can drive crosslinked cable to rotate synchronously by the first sleeve, described the
One housing screw can compress crosslinked cable.
Further setting: second supporting plate and the bottom plate weld, and second shaft passes through with second supporting plate
Bearing connection, second shaft are connect with the heating fuel tank by bearing seal.
So set, sealing and relatively rotating between second shaft and the heating fuel tank, prevent oil leak and can pass
It is dynamic.
Further setting: second shaft and the second sleeve are welded, second housing screw and described second
Sleeve is connected through a screw thread.
So set, second shaft can drive crosslinked cable to rotate synchronously by the second sleeve, described the
Two housing screws can compress crosslinked cable.
Further setting: the rotary electric machine is connected by screw to second supporting plate, the rotary electric machine with it is described
Second shaft is connected by shaft coupling.
So set, the rotary electric machine can provide rotational power by second shaft for crosslinked cable rotation.
Beneficial effect is: 1, by setting image acquisition device, can replace human eye and detect to insulating layer, reduce work
It measures, improves working efficiency；2, by setting rotary electric machine, first sleeve, second sleeve, crosslinked cable can be fixed
And rotate detection；3, by setting driving motor, lead screw, image acquisition device can be made to carry out automatically along crosslinked cable axial direction
Mobile, detection is more comprehensive, more efficient.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the local structure top view of the embodiment of the present invention 1；
Fig. 3 is the local part cross-sectional view of the embodiment of the present invention 1；
Fig. 4 is the local part right view of the embodiment of the present invention 1；
The reference numerals are as follows:
1, support frame；2, bottom plate；3, the first supporting plate；4, first rotating shaft；5, first sleeve；6, the first housing screw；7, heating plate；
8, the second housing screw；9, second sleeve；10, the second shaft；11, the second supporting plate；12, rotary electric machine；13, heating fuel tank；14,
Driving motor；15, lead screw；16, guide rod；17, sliding block；18, electric lifting rod；19, image acquisition device.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be further explained below with reference to the attached drawings:
As Figure 1-Figure 4, a kind of device for detecting insulating layer of crosslinked cable, including support frame 1, bottom plate 2, the first supporting plate 3, bottom plate
Heating fuel tank 13 is provided among 2 upper surfaces, heating fuel tank 13, which serves, contains conduction oil, the setting of 13 lower inside of heating fuel tank
There is heating plate 7, heating plate 7 plays heat effect, and first sleeve 5 is provided at the upper side of heating plate 7, and first sleeve 5 plays fixed friendship
Join cable effect, is provided with the first housing screw 6 in first sleeve 5, the first housing screw 6 plays pressuring action, heating fuel tank 13
5 side of first sleeve is provided with the first supporting plate 3, the first supporting plate 3 plays a supportive role, between the first supporting plate 3 and first sleeve 5
It is provided with first rotating shaft 4, first rotating shaft 4 plays transmission effect, and first rotating shaft 4 runs through heating fuel tank 13, and 7 top of heating plate is far from the
One sleeve, 5 side is provided with second sleeve 9, and second sleeve 9 plays fixed crosslinked cable, is provided with second in second sleeve 9
Housing screw 8, the second housing screw 8 play pressuring action, and heating fuel tank 13 is provided with the second supporting plate close to 9 side of second sleeve
11, the second supporting plate 11 plays a supportive role, and the second shaft 10, the second shaft 10 are provided between the second supporting plate 11 and second sleeve 9
Transmission effect is played, the second shaft 10 runs through heating fuel tank 13, and the second shaft 10 passes through 11 end of the second supporting plate and rotary electric machine 12 is same
Axis connection, 12 model YS-70KTYZ of rotary electric machine, rotary electric machine 12, which serves, provides rotational power, the first supporting plate 3 and second
Support frame 1 is provided on the outside of supporting plate 11, support frame 1 plays a supportive role, and 1 inner upper of support frame is provided with lead screw 15, lead screw 15
Transmission effect is played, wherein one end is coaxially connected through support frame 1 and driving motor 14 for lead screw 15,14 model YS- of driving motor
70KTYZ, driving motor 14 play offer driving power, guide rod 16 are provided with above lead screw 15, and guide rod 16 plays guiding and makees
With being provided with sliding block 17 on lead screw 15 and guide rod 16, sliding block 17 plays connection transmission effect, and 17 lower surface of sliding block is provided with electronic
Elevating lever 18,18 model JEHA of electric lifting rod, electric lifting rod 18 play adjustment focusing, and 18 lower end of electric lifting rod is set
It is equipped with image acquisition device 19,19 model HNY-CV-001 of image acquisition device, image acquisition device 19 plays Image Acquisition transmitting effect,
Support frame 1 and bottom plate 2 weld, and lead screw 15 is connect with support frame 1 by bearing, and driving motor 14 and support frame 1 are connected by screw
It connects, driving motor 14 is connect with lead screw 15 by shaft coupling, and guide rod 16 and support frame 1 weld, and sliding block 17 passes through with lead screw 15
It is threadedly coupled, sliding block 17 is slidably connected with guide rod 16, and electric lifting rod 18 is connected by screw to sliding block 17, image acquisition device
19 are connected by screw to electric lifting rod 18.
Further to improve, the internal diameter of the first sleeve 5 and second sleeve 9 is 50mm, be can satisfy within 50mm
The insulating layer of all crosslinked cables of outer diameter detects.
The working principle of the invention is:
Crosslinked cable is sampled, will wherein be protruded into first sleeve 5 one end, and tighten the first housing screw 6, to crosslinking electricity
Cable is fixed, and crosslinked cable other end is protruded into second sleeve 9, and tightens the second housing screw 8, is compressed
Fixed, heating plate 7 starts, by the heat-conducting oil heating in heating fuel tank 13, and then heat cross-linking cable, make crosslinked cable more
Add it is transparent, driving motor 14 start, be driven by lead screw 15, image acquisition device 19 moved to one end of crosslinked cable, electronic liter
It drops bar 18 to start, height is adjusted to image acquisition device 19 and is focused, is more clear it to the Image Acquisition of crosslinked cable, is schemed
As collector 19 is by the image transmitting after acquisition to image recognition comparison system, carry out judging whether crosslinked cable surface has micro-
Hole, impurity etc. reduce the defect of insulation performance, and rotary electric machine 12 starts, and drive crosslinked cable to be turned by the second shaft 10
It is dynamic, so that image acquisition device 19 is carried out Image Acquisition to the circumference of crosslinked cable, driving motor 14 starts, passes by lead screw 15
It is dynamic, image acquisition device 19 is moved, is finished until the image of the axial direction to crosslinked cable all acquires.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (7)
1. a kind of device for detecting insulating layer of crosslinked cable, it is characterised in that: including support frame, bottom plate, the first supporting plate, the bottom plate
Heating fuel tank is provided among upper surface, the heating fuel tank lower inside is provided with heating plate, the heating plate upper side
It is provided with first sleeve, the first housing screw is provided in the first sleeve, the heating fuel tank is close to the first sleeve
Side is provided with first supporting plate, and first rotating shaft, the first rotating shaft are provided between the first supporting plate and the first sleeve
Through the heating fuel tank, the first sleeve side is provided with second sleeve above the heating plate, described second set
The second housing screw is provided on cylinder, the heating fuel tank is provided with the second supporting plate close to the second sleeve side, and described the
It is provided with the second shaft between two supporting plates and the second sleeve, second shaft runs through the heating fuel tank, and described second
Shaft passes through second supporting plate end and rotary electric machine is coaxially connected, is provided on the outside of first supporting plate and second supporting plate
Support frame as described above, support frame as described above inner upper are provided with lead screw, and wherein one end through support frame as described above and drives the lead screw
Motor coaxle connection, the lead screw top are provided with guide rod, sliding block, the cunning are provided on the lead screw and the guide rod
Block lower surface is provided with electric lifting rod, and the electric lifting rod lower end is provided with image acquisition device, support frame as described above with it is described
Bottom plate welding, the lead screw are connect with support frame as described above by bearing, and the driving motor and support frame as described above are connected by screw
Connect, the driving motor is connect with the lead screw by shaft coupling, and the guide rod and support frame as described above weld, the sliding block with
The lead screw is connected through a screw thread, and the sliding block is slidably connected with the guide rod, and the electric lifting rod and the sliding block are logical
Screw connection is crossed, described image collector is connected by screw to the electric lifting rod.
2. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: the heating fuel tank with
The bottom plate is connected by screw to, and the heating plate is connected by screw to the heating fuel tank.
3. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: first supporting plate with
The bottom plate welding, the first rotating shaft are connect with first supporting plate by bearing, the first rotating shaft and heating oil
Case is connected by bearing seal.
4. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: the first rotating shaft with
The first sleeve welding, first housing screw are connected through a screw thread with the first sleeve.
5. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: second supporting plate with
The bottom plate welding, second shaft are connect with second supporting plate by bearing, second shaft and heating oil
Case is connected by bearing seal.
6. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: second shaft with
The second sleeve welding, second housing screw are connected through a screw thread with the second sleeve.
7. a kind of device for detecting insulating layer of crosslinked cable according to claim 1, it is characterised in that: the rotary electric machine with
Second supporting plate is connected by screw to, and the rotary electric machine is connect with second shaft by shaft coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810909529.3A CN109342454B (en) | 2018-08-10 | 2018-08-10 | Crosslinked cable insulating layer detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810909529.3A CN109342454B (en) | 2018-08-10 | 2018-08-10 | Crosslinked cable insulating layer detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109342454A true CN109342454A (en) | 2019-02-15 |
| CN109342454B CN109342454B (en) | 2024-03-22 |
Family
ID=65296490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810909529.3A Active CN109342454B (en) | 2018-08-10 | 2018-08-10 | Crosslinked cable insulating layer detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342454B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487121A (en) * | 2020-05-18 | 2020-08-04 | 安徽长远机电股份有限公司 | Insulating layer detection device is used in crosslinked polyethylene cable processing |
| CN112285126A (en) * | 2020-11-23 | 2021-01-29 | 山东无棣海丰电缆有限公司 | Rated cable wrapping insulated wire detection equipment |
| CN114498489A (en) * | 2022-04-18 | 2022-05-13 | 湖北工业大学 | Intelligent power distribution system pipe network arrangement device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718715A (en) * | 2009-11-05 | 2010-06-02 | 广州岭南电缆有限公司 | Detection method and device of crosslinked cable insulating layer |
| CN106645146A (en) * | 2016-11-10 | 2017-05-10 | 江苏华远电缆有限公司 | Detection device of insulating layer of cross-linked polyethylene insulating cable |
-
2018
- 2018-08-10 CN CN201810909529.3A patent/CN109342454B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718715A (en) * | 2009-11-05 | 2010-06-02 | 广州岭南电缆有限公司 | Detection method and device of crosslinked cable insulating layer |
| CN106645146A (en) * | 2016-11-10 | 2017-05-10 | 江苏华远电缆有限公司 | Detection device of insulating layer of cross-linked polyethylene insulating cable |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487121A (en) * | 2020-05-18 | 2020-08-04 | 安徽长远机电股份有限公司 | Insulating layer detection device is used in crosslinked polyethylene cable processing |
| CN111487121B (en) * | 2020-05-18 | 2023-03-21 | 涌纬集团股份有限公司 | Insulating layer detection device is used in crosslinked polyethylene cable processing |
| CN112285126A (en) * | 2020-11-23 | 2021-01-29 | 山东无棣海丰电缆有限公司 | Rated cable wrapping insulated wire detection equipment |
| CN114498489A (en) * | 2022-04-18 | 2022-05-13 | 湖北工业大学 | Intelligent power distribution system pipe network arrangement device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109342454B (en) | 2024-03-22 |
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