CN113502702B - Railway roadbed construction equipment and construction method - Google Patents
Railway roadbed construction equipment and construction method Download PDFInfo
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- CN113502702B CN113502702B CN202110812923.7A CN202110812923A CN113502702B CN 113502702 B CN113502702 B CN 113502702B CN 202110812923 A CN202110812923 A CN 202110812923A CN 113502702 B CN113502702 B CN 113502702B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B37/00—Making, maintaining, renewing, or taking-up the ballastway or the track, not provided for in a single one of groups E01B27/00 - E01B35/00
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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Abstract
The invention relates to a railway roadbed construction device and a construction method. The invention optimizes the arrangement adopted by the railway roadbed test scene construction and field laying, changes the scene shared by the traditional multiple machines, improves the scene into single equipment for railway roadbed construction, adopts an adjustable roadbed casting structure in addition, can adjust the height and the width of the laid roadbed according to the test and test requirements, greatly reduces the use of engineering equipment, can be used as the equipment for railway roadbed construction, can adapt to the use working condition according to the use requirements, and is suitable for popularization and use.
Description
Technical Field
The invention relates to the field of railway subgrades, in particular to railway subgrade construction equipment and a construction method.
Background
The railway subgrade is used for bearing the track and the train bearing structure during railway construction, is a foundation for constructing the track, determines the most basic safety of train operation according to the quality of the subgrade, needs to perform the most basic subgrade physical and mechanical property test on the subgrade and the test on the deformation property of an adjacent retaining structure and subgrade structure by railway pile hole excavation when the subgrade is constructed, needs to have different subgrade materials and strength requirements according to different construction requirements, mainly adopts field test and civil test of other fields to simulate the real situation, needs to adopt various devices for auxiliary laying in the traditional subgrade laying, needs a large amount of manpower and material resources in the laying process, and is designed for reducing the output cost of the manpower and material resources.
Disclosure of Invention
The invention aims to provide railway roadbed construction equipment and a construction method, which aim to solve the technical problems and adopt the following technical scheme for realizing the aim:
the utility model provides a railway roadbed construction equipment, includes the road bed and casts shape structure, casts shape shift structure, casts shape angular adjustment structure, casts shape motor, structure position support, vehicle underframe, wheel, water tank, grout spraying mouth, filler opening, processing box, the road bed is cast shape structural connection and is being cast the front side of shape shift structure, it fixes the front side at the shape angular adjustment structure of casting to cast shape shift structure, it fixes the front side at the shape motor to cast shape angular adjustment structural connection, the side at structure position support is fixed respectively to cast shape motor, structure position support fixes the top surface front end at the vehicle underframe, the top surface at the vehicle underframe is fixed to the processing box, the side at the vehicle underframe is connected to the wheel, the top side at the processing box is established to the water tank, the filler opening is established on the trailing flank top of processing box, the grout spraying mouth is established in the leading flank bottom of processing box, and the grout spraying mouth is established at the trailing flank bottom side of road bed casting shape structure.
On the basis of the technical scheme, the roadbed casting structure comprises top surface casting plates and side surface casting plates, the side surface casting plates are provided with two groups, the two groups of side surface casting plates are symmetrically arranged on the bottom sides of two ends of the top surface casting plates, the casting displacement structure comprises a top surface displacement structure and a side surface displacement structure, the side surface displacement structure is provided with two groups, the two groups of side surface displacement structures are symmetrically arranged on two sides of the top surface displacement structure, the casting angle adjustment structure comprises a top surface adjustment structure and a side surface adjustment structure, the side surface adjustment structure is provided with two groups, and the two groups of side surface adjustment structures are symmetrically arranged on two sides of the top surface adjustment structure;
the top surface adjusting structure is fixed at the top end of the top surface displacement structure, the side surface adjusting structure is fixed at the middle section of the rear side surface of the side surface displacement structure, the top surface cast plate is connected at the bottom end of the top surface displacement structure, and the side surface cast plate is connected at the middle section of the side surface displacement structure.
On the basis of the technical scheme, the top surface cast plate and the side surface cast plate are respectively composed of a cast guard plate, side branch guard arms, a rear end parallel arm and a shifting motor, the side branch guard arms are arranged in two groups, the two groups of side branch guard arms are symmetrically arranged on the side surface of the cast guard plate, the rear end parallel arm is arranged at the rear end of the two groups of side branch guard arms, and the cast guard plate, the side branch guard arms and the rear end parallel arm are integrally welded;
the shifting motor is fixed at the middle section of the front side of the rear end parallel arm, and the shifting motor penetrates through the rear end parallel arm to be connected with the top shifting structure and the side shifting structure respectively.
On the basis of the technical scheme, the top surface displacement structure and the side surface displacement structure are composed of a displacement shell, two groups of displacement inner teeth, a half-tooth gear, a gear shaft and a front fixed guard plate, the two groups of displacement inner teeth are symmetrically arranged on two sides of the inner wall of the displacement shell, the displacement shell and the displacement inner teeth are integrally formed, the front fixed guard plate is arranged on the front side of the displacement shell, the gear shaft is arranged on the front side of the half-tooth gear, the half-tooth gear and the gear shaft are integrally formed, the half-tooth gear is arranged in the displacement shell, the half-tooth gear can roll up and down in the displacement shell and is always in contact with one side of the displacement inner teeth, and a shaft sliding groove is formed in the front fixed guard plate;
the gear shaft penetrates through the shaft sliding groove, and the gear shaft is connected to the rear side of the shifting motor.
On the basis of the technical scheme, the processing box body consists of a box shell, an inner stirring barrel, a spiral stirring blade, a spraying pipe, a mortar cavity, a sand discharge switch plate, a stirring barrel support plate, a stirring motor, a motor support plate, a transmission gear and a mortar supply pump, wherein the stirring barrel support plate and the motor support plate are arranged on the inner bottom side of the box shell in parallel from top to bottom, the inner stirring barrel is arranged on the top side of the stirring barrel support plate, the inner stirring barrel can rotate on the top side of the stirring barrel support plate, the stirring motor is fixed on the top side of the motor support plate, the transmission gear is connected to the top side of the stirring motor, the side surface of the transmission gear is connected to the inner bottom side of the inner stirring barrel, the spiral stirring blade is arranged in the inner stirring barrel and is integrally formed with the inner stirring barrel, the mortar cavity is arranged on the bottom side of the inner stirring barrel, the sand discharge switch plate is arranged between the mortar cavity and the inner stirring barrel, the mortar supply pump is arranged on the bottom side of the mortar cavity, the mortar supply pump is communicated with a mortar spraying port, the top end of the side of the box shell is arranged on the top side of the spraying pipe, and the top surface of the water tank is arranged on the top of the spraying pipe;
the inner stirring barrel, the spiral stirring blade, the spraying pipe, the mortar cavity, the sand discharging switch board, the stirring barrel support board, the stirring motor, the motor support board, the transmission gear and the mortar supply pump are all arranged in the box shell.
Compared with the prior art, the invention has the following advantages: the invention optimizes the arrangement adopted by the railway roadbed test scene construction and field laying, changes the traditional scene shared by multiple machines, and improves the scene into single equipment for railway roadbed construction.
Drawings
FIG. 1 is a view of the appearance of the present invention.
FIG. 2 is a schematic diagram of the present invention in a disassembled state.
Fig. 3 is a schematic structural diagram of the front-end device of the present invention.
Fig. 4 is a schematic structural diagram of the backend device of the present invention.
FIG. 5 is a detailed view of the top casting plate of the present invention.
FIG. 6 is a schematic view of a side casting plate of the present invention.
FIG. 7 is a schematic diagram of a top-side displacement structure and a side-side displacement structure according to the present invention.
FIG. 8 is a schematic side plan view of a process tank of the present invention.
In the figure: the device comprises a roadbed cast structure 1, a cast displacement structure 2, a cast angle adjusting structure 3, a cast motor 4, a structure position bracket 5, a vehicle underframe 6, wheels 7, a water tank 8, a slurry spraying port 9, a filling port 10 and a processing box body 11;
the device comprises a top surface cast plate 1-1, a side surface cast plate 1-2, a cast guard plate 1-3, a side supporting arm 1-4, a rear end parallel arm 1-5 and a shifting motor 1-6;
the device comprises a top surface shifting structure 2-1, a side surface shifting structure 2-2, a shifting shell 2-3, shifting inner teeth 2-4, a half-tooth gear 2-5, a gear shaft 2-6, a front fixed guard plate 2-7 and a shaft sliding groove 2-8;
a top surface adjusting structure 3-1 and a side surface adjusting structure 3-2;
a water injection pipe 8-1 and a spray water pump 8-2;
the mortar box comprises a box shell 11-1, an inner stirring barrel 11-2, a spiral stirring blade 11-3, a spraying pipe 11-4, a mortar cavity 11-5, a sand discharge switch plate 11-6, a stirring barrel support plate 11-7, a stirring motor 11-8, a motor support plate 11-9, a transmission gear 11-10 and a mortar supply pump 11-11.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
The utility model provides a railway roadbed construction equipment, includes roadbed cast structure 1, casts shape shift structure 2, casts shape angular adjustment structure 3, casts shape motor 4, structure position support 5, vehicle underframe 6, wheel 7, water tank 8, grout spraying port 9, filler hole 10, processing box 11, roadbed cast structure 1 connects the front side at cast shape shift structure 2, cast shape shift structure 2 fixes the front side at cast shape angular adjustment structure 3, cast shape angular adjustment structure 3 connects the front side at cast shape motor 4, cast shape motor 4 fixes the side at structure position support 5 respectively, structure position support 5 fixes the top surface front end at vehicle underframe 6, processing box 11 fixes the top surface at vehicle underframe 6, wheel 7 connects the side at vehicle underframe 6, water tank 8 establishes the top side at processing box 11, filler hole 10 establishes the trailing flank top at processing box 11, grout spraying port 9 establishes the leading flank bottom at processing box 11, and grout spraying port 9 establishes the trailing flank bottom side at roadbed cast shape structure 1.
The roadbed casting structure 1 comprises top surface casting plates 1-1 and side surface casting plates 1-2, the side surface casting plates 1-2 are provided with two groups, the two groups of side surface casting plates 1-2 are symmetrically arranged at the bottom sides of two ends of the top surface casting plates 1-1, the casting displacement structure 2 comprises top surface displacement structures 2-1 and side surface displacement structures 2-2, the side surface displacement structures 2-2 are provided with two groups, the two groups of side surface displacement structures 2-2 are symmetrically arranged at two sides of the top surface displacement structure 2-1, the casting angle adjustment structure 3 comprises top surface adjustment structures 3-1 and side surface adjustment structures 3-2, the side surface adjustment structures 3-2 are provided with two groups, the two groups of side surface adjustment structures 3-2 are symmetrically arranged at two sides of the top surface adjustment structures 3-1, the top surface adjustment structures 3-1 are fixed at the top end of the top surface displacement structures 2-1, the side surface adjustment structures 3-2 are fixed at the middle section of the side surface displacement structures 2-2, the top surface displacement plates 1-1 are connected at the bottom end of the top surface displacement structures 2-1, and the side surface casting plates 2-2 are connected at the middle section of the side surface displacement structures.
The top surface casting plate 1-1 and the side surface casting plate 1-2 are composed of casting-shaped guard plates 1-3, side branch guard arms 1-4, rear end parallel arms 1-5 and shifting motors 1-6, the side branch guard arms 1-4 are provided with two groups, the two groups of side branch guard arms 1-4 are symmetrically arranged on the side surfaces of the casting-shaped guard plates 1-3, the rear end parallel arms 1-5 are arranged at the rear ends of the two groups of side branch guard arms 1-4, the casting-shaped guard plates 1-3, the side branch guard arms 1-4 and the rear end parallel arms 1-5 are integrally welded, the shifting motors 1-6 are fixed at the middle sections of the front sides of the rear end parallel arms 1-5, and the shifting motors penetrate through the rear end parallel arms and are respectively connected with the top surface shifting structures 2-1 and the side surface shifting structures 2-2.
The top surface displacement structure 2-1 and the side surface displacement structure 2-2 are composed of a displacement shell 2-3, a displacement inner tooth 2-4, a semi-tooth gear 2-5, a gear shaft 2-6 and a front fixed guard plate 2-7, the displacement inner tooth 2-4 is provided with two groups, the two groups of displacement inner teeth 2-4 are symmetrically arranged on two sides of the inner wall of the displacement shell 2-3, and the displacement shell 2-3 and the displacement inner tooth 2-4 are integrally formed, the front fixed guard plate 2-7 is arranged on the front side of the displacement shell 2-3, the gear shaft 2-6 is arranged on the front side of the semi-tooth gear 2-5, the semi-tooth gear 2-5 and the gear shaft 2-6 are integrally formed, the semi-tooth gear 2-5 is arranged in the displacement shell 2-3, the semi-tooth gear 2-5 can roll up and down in the displacement shell 2-3, the semi-tooth gear 2-5 is always in contact with one side of the displacement inner tooth 2-4, a shaft chute 2-8 is arranged on the front fixed guard plate 2-7, the gear shaft 2-6 passes through the shaft 2-8 and is connected with a rear motor at the side of the gear shaft 2-6.
The processing box body 11 consists of a box shell 11-1, an inner stirring barrel 11-2, a spiral stirring blade 11-3, a spraying pipe 11-4, a mortar cavity 11-5, a sand discharge switch plate 11-6, a stirring barrel support plate 11-7, a stirring motor 11-8, a motor support plate 11-9, a transmission gear 11-10 and a mortar supply pump 11-11, wherein the stirring barrel support plate 11-7 and the motor support plate 11-9 are arranged on the inner bottom side of the box shell 11-1 in parallel, the inner stirring barrel 11-2 is arranged on the top side of the stirring barrel support plate 11-7, the inner stirring barrel 11-2 can rotate on the top side of the stirring barrel support plate 11-7, the stirring motor 11-8 is fixed on the top side of the motor support plate 11-9, and the transmission gear 11-10 is connected on the top side of the stirring motor 11-8, the side surface of a transmission gear 11-10 is connected to the inner bottom side of an inner stirring barrel 11-2, a spiral stirring blade 11-3 is arranged in the inner stirring barrel 11-2, the spiral stirring blade 11-3 and the inner stirring barrel 11-2 are integrally formed, a mortar cavity 11-5 is arranged at the bottom side of the inner stirring barrel 11-2, a sand discharge switch plate 11-6 is arranged between the mortar cavity 11-5 and the inner stirring barrel 11-2, a mortar supply pump 11-11 is arranged at the bottom side of the mortar cavity 11-5, the mortar supply pump 11-11 is communicated with a mortar spraying port 9, a filling port 10 is arranged at the top end of the side surface of a box shell 11-1, the horizontal position of the filling port 10 is higher than that of the inner stirring barrel 11-2, and a spraying pipe 11-4 is fixed at the inner top side of the box shell 11-1, the inner top side of the water tank 8 is provided with a water injection pipe 8-1, the inner bottom side of the water tank 8 is provided with a spray water pump 8-2, the spray pipes 11-4 are connected to two sides of the bottom surface of the spray water pump 8-2, the inner stirring barrel 11-2, the spiral stirring blades 11-3, the spray pipes 11-4, the mortar cavity 11-5, the sand discharge switch plate 11-6, the stirring barrel support plate 11-7, the stirring motor 11-8, the motor support plate 11-9, the transmission gear 11-10 and the mortar supply pump 11-11 are all arranged in the box shell 11-1.
The construction method using the railway roadbed construction equipment comprises the following steps: the equipment is mainly used in two using processes, namely roadbed casting of the equipment and guniting and pouring of the equipment.
The utility model provides a for the work of road bed cast shape, the road bed cast shape is that the road bed that utilizes road bed cast shape structure to come to construct is made the template, adjust the size of its road bed according to the user demand, can adjust the height of top surface cast plate through the shift motor, perhaps utilize the side height and the side position of shift motor adjustment side cast plate, if the slope of needs adjustment road bed, just need the rotation of cast shape motor, drive top surface adjustment structure and side adjustment structure and rotate, and then top surface cast plate and top surface shift structure at top surface adjustment structure front side also can use top surface adjustment structure to rotate as the axle center, side adjustment structure has also driven the rotation of side shift structure and side cast plate in the same way, make its angle of adjustment.
And secondly, slurry spraying and pouring work is carried out, after the work of the template is completed, the raw materials paved on the roadbed are added into the processing box body from the filling port, in the processing box body, the water sprayed out of the water box by the spraying pipe is mixed with the raw materials, the materials can be mixed to meet the use requirement of the roadbed through the stirring action of the inner stirring barrel and the spiral stirring blades, the sand discharge switch board is kept closed in the mixing process, the sand discharge switch board is opened after the mixing is completed, the mixed mortar falls into the mortar cavity from the inner stirring barrel, and the mortar is sprayed out from the slurry spraying port through the mortar supply pump.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.
Claims (3)
1. A railway roadbed construction device is characterized by comprising a roadbed cast structure (1), a cast displacement structure (2), a cast angle adjusting structure (3), a cast motor (4), a structure position support (5), a vehicle underframe (6), wheels (7), a water tank (8), a grout spraying port (9), a filling port (10) and a processing box body (11), the roadbed cast structure (1) is connected to the front side of the cast displacement structure (2), the cast displacement structure (2) is fixed at the front side of the cast angle adjusting structure (3), the cast angle adjusting structure (3) is connected to the front side of the cast motor (4), the cast motors (4) are respectively fixed at the side ends of the structure position brackets (5), the structure position bracket (5) is fixed at the front end of the top surface of the vehicle underframe (6), the processing box body (11) is fixed on the top surface of the vehicle underframe (6), the wheels (7) are connected with the side surface of the vehicle underframe (6), the water tank (8) is arranged on the top side surface of the processing box body (11), the filling opening (10) is arranged at the top end of the rear side surface of the processing box body (11), the guniting port (9) is arranged at the bottom end of the front side surface of the processing box body (11), the guniting port (9) is arranged at the rear bottom side of the roadbed cast structure (1);
the roadbed casting structure (1) consists of a top surface casting plate (1-1) and a side surface casting plate (1-2), the side surface casting plates (1-2) are provided with two groups, the two groups of side surface casting plates (1-2) are symmetrically arranged at the bottom sides of the two ends of the top surface casting plate (1-1), the cast displacement structure (2) consists of a top surface displacement structure (2-1) and a side surface displacement structure (2-2), the side surface displacement structures (2-2) are provided with two groups, the two groups of side surface displacement structures (2-2) are symmetrically arranged at the two sides of the top surface displacement structure (2-1), the cast angle adjusting structure (3) consists of a top surface adjusting structure (3-1) and a side surface adjusting structure (3-2), two groups of side surface adjusting structures (3-2) are arranged, the two groups of side surface adjusting structures (3-2) are symmetrically arranged at two sides of the top surface adjusting structure (3-1), the top surface adjusting structure (3-1) is fixed at the top end of the top surface displacement structure (2-1), the side surface adjusting structure (3-2) is fixed at the middle section of the rear side surface of the side surface shifting structure (2-2), the top surface casting plate (1-1) is connected with the bottom end of the top surface displacement structure (2-1), the side casting plate (1-2) is connected to the middle section of the side shifting structure (2-2);
the top surface casting plate (1-1) and the side surface casting plate (1-2) are composed of casting-shaped guard plates (1-3), side branch guard arms (1-4), rear end combining arms (1-5) and shifting motors (1-6), the side branch guard arms (1-4) are arranged in two groups, the two groups of side branch guard arms (1-4) are symmetrically arranged on the side surfaces of the casting-shaped guard plates (1-3), the rear end combining arms (1-5) are arranged at the rear ends of the two groups of side branch guard arms (1-4), the casting-shaped guard plates (1-3), the side branch guard arms (1-4) and the rear end combining arms (1-5) are integrally welded, the shifting motors (1-6) are fixed at the middle sections of the front sides of the rear end combining arms (1-5), and the shifting motors penetrate through the rear end combining arms to respectively connect the top surface shifting structures (2-1) and the side surface shifting structures (2-2).
2. The railway roadbed construction equipment according to claim 1, wherein the top surface displacement structure (2-1) and the side surface displacement structure (2-2) are composed of a displacement housing (2-3), displacement internal teeth (2-4), a half-tooth gear (2-5), a gear shaft (2-6) and a front fixed guard plate (2-7), the displacement internal teeth (2-4) are provided with two sets, the two sets of displacement internal teeth (2-4) are symmetrically arranged on two sides of the inner wall of the displacement housing (2-3), the displacement housing (2-3) and the displacement internal teeth (2-4) are integrally formed, the front fixed guard plate (2-7) is arranged on the front side of the displacement housing (2-3), the gear shaft (2-6) is arranged on the front side of the half-tooth gear (2-5), the half-tooth gear (2-5) and the gear shaft (2-6) are integrally formed, the half-tooth gear (2-5) is arranged in the displacement housing (2-3), the half-tooth gear (2-5) can roll on the displacement housing (2-3), the front side of the half-tooth gear (2-5) and the front fixed guard plate (2-tooth shaft (2-4) is always contacted with the front sliding chute (8), the gear shaft (2-6) penetrates through the shaft sliding groove (2-8), and the gear shaft (2-6) is connected to the rear side of the displacement motor (1-6).
3. The railroad bed construction equipment according to claim 1, wherein the processing box (11) is composed of a box body (11-1), an inner stirring barrel (11-2), a spiral stirring blade (11-3), a spraying pipe (11-4), a mortar cavity (11-5), a sand discharge switch plate (11-6), a stirring barrel support plate (11-7), a stirring motor (11-8), a motor support plate (11-9), a transmission gear (11-10) and a mortar supply pump (11-11), the stirring barrel support plate (11-7) and the motor support plate (11-9) are arranged in parallel up and down on the inner bottom side of the box body (11-1), the inner stirring barrel (11-2) is arranged on the top side of the stirring barrel support plate (11-7), the inner stirring barrel (11-2) can rotate on the top side of the stirring barrel support plate (11-7), the stirring motor (11-8) is fixed on the top side of the motor support plate (11-9), the transmission gear (11-10) is connected on the top side of the stirring motor (11-8), the inner stirring barrel (11-2) is connected on the inner side of the stirring blade (11-2), the spiral stirring blade (11-3) and the inner stirring barrel (11-2) are integrally formed, the mortar cavity (11-5) is arranged at the bottom side of the inner stirring barrel (11-2), the sand discharge switch plate (11-6) is arranged between the mortar cavity (11-5) and the inner stirring barrel (11-2), the mortar supply pump (11-11) is arranged at the bottom side of the mortar cavity (11-5), the mortar supply pump (11-11) is communicated with the mortar spraying port (9), the filling port (10) is arranged at the top end of the side surface of the box shell (11-1), the horizontal position of the filling port (10) is higher than that of the inner stirring barrel (11-2), the spraying pipe (11-4) is fixed at the inner top side of the box shell (11-1), the inner top side of the water tank (8) is provided with a water injection pipe (8-1), the inner bottom side of the water tank (8) is provided with a spraying water pump (8-2), the spraying pipe (11-4) is connected with the spraying pump (8-2), the inner stirring barrel (11-2), the spraying switch plate (11-4), the stirring barrel (11-2), the stirring blade (11-2), the spraying pipe (11-5), the stirring barrel (11-2), the stirring plate (11-2), the spraying pipe (11-5), the sand-2) and the spraying pipe (11-5), the stirring barrel (11-2) are connected with the spraying pipe (11-2) and the spraying pump (11-5) and the stirring barrel (11-2) and the spraying pipe (11-2) and the sand-2) connected to the spraying pipe (11-2) and the spraying pipe (11-2) in the spraying pipe (11-2), the motor support plate (11-9), the transmission gear (11-10) and the mortar supply pump (11-11) are all arranged in the box shell (11-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812923.7A CN113502702B (en) | 2021-07-19 | 2021-07-19 | Railway roadbed construction equipment and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812923.7A CN113502702B (en) | 2021-07-19 | 2021-07-19 | Railway roadbed construction equipment and construction method |
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| CN113502702A CN113502702A (en) | 2021-10-15 |
| CN113502702B true CN113502702B (en) | 2022-10-28 |
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