CN114277794A - Soft soil foundation pile hole construction equipment and construction process thereof - Google Patents
Soft soil foundation pile hole construction equipment and construction process thereof Download PDFInfo
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- CN114277794A CN114277794A CN202111606128.9A CN202111606128A CN114277794A CN 114277794 A CN114277794 A CN 114277794A CN 202111606128 A CN202111606128 A CN 202111606128A CN 114277794 A CN114277794 A CN 114277794A
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Abstract
The utility model relates to a soft soil foundation pile hole construction equipment and a construction process thereof, which relate to the field of pile hole construction and comprise a vehicle body, a drilling device and an auxiliary device, wherein the auxiliary device is arranged on the vehicle body and comprises an extending part, a first air bag and a first driving cylinder, the first air bag is arranged around the extending part, the first driving cylinder is used for driving the extending part to move, and the moving direction of the extending part is consistent with the drilling direction of the drilling device; the inflation device comprises a first air pump and a first air pipe, the first air pump is arranged on the auxiliary device, one end of the first air pipe is communicated with the first air pump, the other end of the first air pipe is communicated with the first air bag, and the first air bag expands towards the outer side of the stretching piece after being inflated. This application has the effect that reduces sand and soil and drop to the downthehole possibility of stake.
Description
Technical Field
The application relates to the field of pile hole construction, in particular to soft soil foundation pile hole construction equipment and a construction process thereof.
Background
The foundation pile hole construction means that a pile hole is formed in foundation soil through means such as mechanical drilling and the like on an engineering site, and constructors often use a pile hole machine to drill holes.
Referring to fig. 1 and 2, in the related art, a pile hole drilling machine generally includes a drilling device, a drill bit of the drilling device can directly drill into a foundation and then drill a hole, but soil is gathered around the drill bit during the drilling process and then an annular soil pile 011 is formed around a pile hole 01, when the drill bit is drawn out of the drilled pile hole 01, sand of the annular soil pile 011 around the pile hole 01 drops toward the inside of the pile hole 01, and when people clean the sand, the sand falls into the pile hole 01.
In view of the above-mentioned related technologies, the inventor believes that the sandy soil of the annular soil pile may drop into a pile hole drilled just now, which brings inconvenience to subsequent construction.
Disclosure of Invention
In order to reduce the possibility that sandy soil drops to the pile hole, the application provides soft soil foundation pile hole construction equipment and a construction process thereof.
In a first aspect, the application provides a soft soil foundation pile hole construction equipment, adopts following technical scheme:
the pile hole construction equipment for the soft soil foundation comprises a vehicle body, a drilling device and an auxiliary device, wherein the auxiliary device is arranged on the vehicle body and comprises an extending part, a first air bag and a first driving cylinder, the first air bag is arranged around the extending part in a surrounding mode, the first driving cylinder is used for driving the extending part to move, and the moving direction of the extending part is consistent with the drilling direction of the drilling device; the inflation device comprises a first air pump and a first air pipe, the first air pump is arranged on the auxiliary device, one end of the first air pipe is communicated with the first air pump, the other end of the first air pipe is communicated with the first air bag, and the first air bag expands towards the outer side of the stretching piece after being inflated.
Through adopting above-mentioned technical scheme, after boring foundation pile hole drilling when boring native device, stretch into a activity through the drive of first driving cylinder, will stretch into a piece and stretch into to annular soil and pile in, then start first air pump, aerify towards first air pocket through first trachea, make first air pocket inflation, the first air pocket after the inflation pushes away the sand and soil of annular soil heap, the sand and soil of annular soil heap is pushed to both sides this moment, has reduced the possibility that sand and soil falls into the stake downthehole, subsequent construction of being convenient for.
Optionally, still include the head, the head includes adjustable shelf and a plurality of second actuating cylinder, the adjustable shelf with the automobile body rotates to be connected, the axis of rotation of adjustable shelf sets up along the horizontal direction, the second actuating cylinder is used for the drive the adjustable shelf rotates, drilling equipment with auxiliary device all set up in on the adjustable shelf.
By adopting the technical scheme, when the drilling device and the auxiliary device are not needed, the movable frame is driven to rotate only by the second driving cylinder, so that the movable frame drives the drilling device and the auxiliary device to rotate, the drilling device and the auxiliary device are rotated above the vehicle body, and the vehicle body is convenient to move; when the drilling device and the auxiliary device are needed, only the movable frame needs to be rotated reversely.
Optionally, the drilling device and the auxiliary device slide on the movable frame, the sliding direction of the drilling device and the auxiliary device is parallel to the rotation axis of the movable frame, and the driving device is used for driving the drilling device and the auxiliary device to slide on the movable frame.
Through adopting above-mentioned technical scheme, when needs drive drilling equipment and auxiliary device motion, can drive drilling equipment and auxiliary device automatic operation through drive arrangement, improve the degree of automation of this application device, alleviateed constructor's labour.
Optionally, the driving device includes a first motor and a stud, the stud is rotatably connected to the movable frame, the first motor is used for driving the stud to rotate, and the stud drives the drilling device and the auxiliary device to slide through threads.
Through adopting above-mentioned technical scheme, because drilling equipment needs stable when drilling, auxiliary device also needs stable when stretching into annular soil heap, consequently needs to have self-locking function's drive arrangement, and screw drive has self-locking function, drives drilling equipment and auxiliary device through the screw, and when screw stall, drilling equipment and auxiliary device can stop in a position department of screw, and the stability when having improved the operation is one of this application drive arrangement's preferred scheme.
Optionally, the auxiliary device further comprises a second air bag, the extending piece is used for extending into the pile hole, and the second air bag is arranged around the extending piece; the inflation device further comprises a second air pump and a second air pipe, the second air pump is arranged on the auxiliary device, one end of the second air pipe is communicated with the second air pump, the other end of the second air pipe is communicated with the second air bag, the second air bag is used for being abutted to the inner wall of the pile hole after being inflated, and when the second air bag is abutted to the inner wall of the pile hole, the first air bag is located outside the pile hole.
Through adopting above-mentioned technical scheme, when needs are piled annular soil and are cleared up, will stretch into the piece and insert to the stake downthehole, then aerify to in the second gasbag, the expanded second gasbag can with stake downthehole wall butt, realize the shutoff to the stake hole, promote the in-process that annular soil piled this moment, sand and soil can not drop to the stake downthehole, has reduced the downthehole possibility of advancing sand of stake.
Optionally, the first air pipe and the second air pipe are communicated with one end, close to the first driving cylinder, of the extending piece, a first air passage and a second air passage are formed in the extending piece, one end of the first air passage is communicated with the first air pipe, the other end of the first air passage is communicated with the first air bag, one end of the second air passage is communicated with the second air pipe, and the other end of the second air passage is communicated with the second air bag.
Through adopting above-mentioned technical scheme, because first gasbag and second gasbag all need take over, in order to reduce the possibility that first trachea and second trachea and annular soil pile touched, locate the one end that stretches into the piece with the tracheal connected point of first trachea and second, switch on through first air flue and second air flue, can realize aerifing first gasbag and second gasbag, also can reduce the possibility that first trachea and second trachea push away annular soil pile.
Optionally, the stretching-in piece is provided with annular grooves at positions of the first air bag and the second air bag, and the first air bag and the second air bag are arranged in the annular grooves at positions of the first air bag and the second air bag.
Through adopting above-mentioned technical scheme, when first gasbag and second gasbag do not aerify, can receive first gasbag and second gasbag in the annular, when stretching into the piece and stretching into annular soil heap and stake downthehole, can reduce the first gasbag that does not aerify and open and second gasbag and annular soil heap and produce the possibility of colliding, be convenient for will stretch into the piece and insert to the stake downthehole.
Optionally, the air bag further comprises two tightening ropes, one tightening rope is used for winding the first air bag which is not inflated, the other tightening rope is used for winding the second air bag which is not inflated, two ends of the tightening rope are connected through magic tapes, and the tightening rope is used for pressing the first air bag which is not inflated and the second air bag into the annular groove.
By adopting the technical scheme, when the first air bag and the second air bag are not inflated, the tightening ropes are tied outside the first air bag and the second air bag and then are adhered by the magic tapes, and the uninflated first air bag and the uninflated second air bag are pressed in the annular grooves through the tightening ropes, so that the possibility of collision between the first air bag and the annular soil pile when the first air bag and the second air bag are not inflated is reduced; therefore, the magic tape is used because the magic tape is lightly adhered, and when the first air bag and the second air bag are inflated, the tightening belt can be easily unfolded.
Optionally, the storage device includes a storage box, rollers and a second motor, the storage box is connected to the first driving cylinder, the first air pump and the second air pump are both disposed on the storage box, the first air pipe and the second air pipe all pass through the storage box, the rollers are rotatably connected to the interior of the storage box and four rollers are disposed, two rollers are used for clamping the first air pipe, two rollers are used for clamping the second air pipe, one roller is used for clamping the first air pipe and one roller is used for clamping the second air pipe, and the second motor is used for driving any one of the rollers to rotate.
Through adopting above-mentioned technical scheme, because it needs stretch into annular soil heap and stake downthehole to stretch into the piece, consequently need remove, first trachea and second trachea also just also need follow and stretch into the piece and remove, set up storage device, when stretching into the piece and withdrawing, the second motor drives the gyro wheel and rotates, with first trachea and second trachea traction to the containing box in, the containing box is used for accomodating first trachea and second trachea, first trachea and the big section of second trachea expose outside and impaired possibility has been reduced, when needs will stretch into the piece and extend away, the antiport second motor, the second motor will drive gyro wheel antiport, with this send out first trachea and second trachea.
In a second aspect, the application provides a soft soil foundation pile hole construction process, which adopts the following technical scheme:
a soft soil foundation pile hole construction process comprises soft soil foundation pile hole construction equipment, and comprises the following steps:
s1: drilling the foundation by a drilling device;
s2: removing the drilling device, and moving the auxiliary device above the pile hole;
s3: starting a first driving cylinder to insert the extending piece into the annular soil pile;
s4: and starting the first air pump, and inflating the first air bag until the expanded first air bag pushes the annular soil pile outwards.
Through adopting above-mentioned technical scheme, earlier drill hole through drilling equipment, then push away the soil heap of stake hole both sides through auxiliary device, reduced the possibility that sand and soil dropped to the stake downthehole.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the auxiliary device can plug the pile hole and push the annular soil pile around the pile hole away, so that the possibility that sand falls into the pile hole is reduced;
2. the tightening rope is matched with the annular groove, so that the possibility of collision between the uninflated first air bag and the annular soil pile and the possibility of collision between the uninflated second air bag and the annular soil pile are reduced, and the extension piece can conveniently extend into the pile hole;
3. storage device is convenient for accomodate first trachea and second trachea.
Drawings
FIG. 1 is a schematic structural diagram of a related art of the present application;
FIG. 2 is a schematic view of a pile hole according to the related art of the present application;
FIG. 3 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 4 is an enlarged view at A in FIG. 3;
FIG. 5 is a schematic structural view of an inflator according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of the first air passage and the second air passage of the embodiment of the application;
fig. 7 is a schematic structural diagram of a storage device according to an embodiment of the present application.
Description of reference numerals: 01. pile holes; 011. annular soil heap; 1. a vehicle body; 2. a mobile device; 21. a movable frame; 22. a second drive cylinder; 3. a drive device; 31. a first motor; 32. a stud; 4. a drilling device; 41. a support frame; 5. an auxiliary device; 51. an insertion member; 511. a ring groove; 512. a first air passage; 513. a second air passage; 52. a first air bag; 53. a second air bag; 54. a first drive cylinder; 6. tightening the rope; 7. an inflator; 71. a first air pump; 72. a first air pipe; 73. a second air pump; 74. a second air pipe; 8. a storage device; 81. a storage box; 82. a roller; 83. a second motor.
Detailed Description
The present application is described in further detail below with reference to figures 3-7.
The embodiment of the application discloses soft soil foundation stake hole construction equipment.
Referring to fig. 3, 4 and 5, the soft soil foundation pile hole construction equipment includes a vehicle body 1, a moving device 2, a driving device 3, a drilling device 4, an auxiliary device 5 and a storage device 8.
Referring to fig. 3, automobile body 1 is haulage vehicle, and head 2 includes adjustable shelf 21 and a plurality of second actuating cylinder 22, and adjustable shelf 21 is the frame portal, and adjustable shelf 21 passes through the axis of rotation with automobile body 1 and rotates to be connected, and the axis of rotation of adjustable shelf 21 sets up along the horizontal direction, and second actuating cylinder 22 is the hydro-cylinder, and second actuating cylinder 22 passes through screw fixed connection on automobile body 1, and second actuating cylinder 22 is used for driving adjustable shelf 21 to rotate, drilling equipment 4 with auxiliary device 5 all sets up on adjustable shelf 21, is equipped with the slide rail on adjustable shelf 21, and drilling equipment 4 and auxiliary device 5 all slide on adjustable shelf 21 through rolling wheel and slider, and the axis of rotation of sliding direction and adjustable shelf 21 is parallel, and drilling equipment 4 is common stake hole perforating device
Referring to fig. 3, the driving device 3 is disposed on the movable frame 21, and the driving device 3 is used for driving the drilling device 4 and the auxiliary device 5 to slide on the movable frame 21; in other embodiments, the driving device 3 is a hydraulic cylinder, in this embodiment, the driving device 3 includes a first motor 31 and a stud 32, the first motor 31 is fixedly connected to the movable frame 21 through a screw, an output end of the first motor 31 is connected to a speed reducer, the stud 32 is connected to the movable frame 21 through a bracket, the stud 32 is rotatably connected to the bracket through a bearing, an axis of the stud 32 and an axis of rotation of the stud 32 are both parallel to an axis of rotation of the movable frame 21, the first motor 31 is configured to drive the stud 32 to rotate, the drilling device 4 includes a support frame 41, the support frame 41 of the drilling device 4 is in threaded connection with the stud 32, and the stud 32 drives the drilling device 4 to slide through a thread.
Referring to fig. 4 and 5, the auxiliary device 5 includes an extending member 51, a first air bag 52, a second air bag 53 and a first driving cylinder 54, the extending member 51 is cylindrical, the diameter of the extending member 51 is smaller than that of a pile hole 01 drilled by the drilling device 4, the extending member 51 is used for being inserted into the pile hole 01, two annular grooves 511 are formed on the peripheral wall of the extending member 51, the two annular grooves 511 are distributed along the axial direction of the extending member 51, the first air bag 52 is bonded in one annular groove 511 through a strong adhesive, the second air bag 53 is bonded in the other annular groove 511 through a glue, the first air bag 52 and the second air bag 53 are both annular air bags, the first air bag 52 and the second air bag 53 are all arranged around the extending member 51, the volume of the first air bag 52 is larger than that of the second air bag 53, one end of the extending member 51 is connected with a piston rod of the first driving cylinder 54 through a connecting block, a piston rod of the second driving cylinder 22 is used for driving the extending member 51 to move, the moving direction of the piston rod of the second driving cylinder 22 is consistent with the axis of the extending piece 51, the moving direction of the piston rod of the second driving cylinder 22 is consistent with the drilling direction of the drilling device 4, and the second air bag 53 is positioned on one side of the first air bag 52 far away from the first driving cylinder 54.
Referring to fig. 4, two tightening ropes 6 are further included, one tightening rope 6 is used for winding the first uninflated air bag 52, the other tightening rope 6 is used for winding the second uninflated air bag 53, two ends of the tightening rope 6 are connected through a magic tape, and the tightening rope 6 is used for pressing the first uninflated air bag 52 and the second air bag 53 into the annular groove 511.
Referring to fig. 5 and 6, the inflator 7 includes a first air pump 71, a first air pipe 72, a second air pump 73 and a second air pipe 74, the first air pipe 72 and the second air pipe 74 are both communicated with the end surface of the extending member 51 close to the first driving cylinder 54, a first air passage 512 and a second air passage 513 are arranged in the extending member 51, one end of the first air passage 512 is communicated with the first air pipe 72, the other end is communicated with the inner wall of the annular groove 511 and the outer wall of the first air bag 52 and is communicated with the first air bag 52, one end of the second air passage 513 is communicated with the second air pipe 74, and the other end is communicated with the inner wall of the annular groove 511 and the outer wall of the second air bag 53 and is communicated with the second air bag 53; one end of the first air pipe 72 far away from the extending piece 51 is communicated with the first air pump 71, and one end of the second air pipe 74 far away from the extending piece 51 is communicated with the second air pump 73; the first air bag 52 is inflated and expanded to the outside of the inserting member 51, the second air bag 53 is inflated and used for abutting against the inner wall of the pile hole 01, and when the second air bag 53 abuts against the inner wall of the pile hole 01, the first air bag 52 is positioned outside the pile hole 01.
Referring to fig. 7, the receiving device 8 includes a receiving box 81, the air pump device comprises rollers 82 and a second motor 83, a cavity is formed in the containing box 81, the containing box 81 is in threaded connection with the stud 32, the first air pump 71 and the second air pump 73 are fixedly connected to the containing box 81 through screws, the first air pipe 72 and the second air pipe 74 penetrate through the containing box 81, a cylinder body of the first driving cylinder 54 is fixedly connected to the containing box 81 through screws, the first driving cylinder 54 is located on one side, away from the movable frame 21, of the containing box 81, the rollers 82 are rotatably connected into the containing box 81 through bearings and are provided with four rollers, the two rollers 82 are used for clamping the first air pipe 72, the two rollers 82 are used for clamping the second air pipe 74, one roller 82 used for clamping the first air pipe 72 is coaxially and fixedly connected with one roller 82 used for clamping the second air pipe 74, the second motor 83 is fixedly connected into the containing box 81 through screws, and the second motor 83 is used for driving the rollers 82 to rotate.
The embodiment of the application also discloses a soft soil foundation pile hole construction process.
A soft soil foundation pile hole construction process comprises soft soil foundation pile hole construction equipment, and comprises the following steps:
s1: and drilling the foundation by the drilling device 4.
S2: the first motor 31 is started, the first motor 31 drives the stud 32 to rotate, the stud 32 rotates to drive the drilling device 4 to move, the drilling device 4 is removed, and meanwhile the auxiliary device 5 is moved above the pile hole 01.
S3: the first driving cylinder 54 is actuated to insert the inserting member 51 into the annular soil heap 011 until the second air cell 53 is inserted into the pile hole 01, and the second motor 83 is actuated to pull the first air tube 72 and the second air tube 74 out of the storage box 81.
S4: the second air pump 73 is started to inflate the second air bag 53 to enable the second air bag 53 to be abutted with the inner wall of the pile hole 01, then the first air pump 71 is started to inflate the first air bag 52 until the inflated first air bag 52 pushes the annular soil pile 011 outwards.
S5: after the soil is cleaned, the air bag is deflated, then the extending piece 51 is retracted through the first driving cylinder 54, the second motor 83 is started, and the rotation is reversed to enable the roller 82 to pull the first air pipe 72 and the second air pipe 74 back into the containing box 81.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a soft soil foundation stake hole construction equipment, includes automobile body (1) and drilling equipment (4), its characterized in that still includes:
the auxiliary device (5) is arranged on the vehicle body (1), the auxiliary device (5) comprises an extending piece (51), a first air bag (52) and a first driving cylinder (54), the first air bag (52) is arranged around the extending piece (51), the first driving cylinder (54) is used for driving the extending piece (51) to move, and the moving direction of the extending piece (51) is consistent with the drilling direction of the drilling device (4);
aerating device (7), aerating device (7) include first air pump (71) and first trachea (72), first air pump (71) set up in on auxiliary device (5), first trachea (72) one end with first air pump (71) intercommunication, the other end with first gasbag (52) intercommunication, after aerifing first gasbag (52) court stretch into piece (51) outside inflation.
2. A soft soil foundation pile hole construction equipment as claimed in claim 1,
still include head (2), head (2) include adjustable shelf (21) and a plurality of second actuating cylinder (22), adjustable shelf (21) with automobile body (1) rotates to be connected, the axis of rotation of adjustable shelf (21) sets up along the horizontal direction, second actuating cylinder (22) are used for the drive adjustable shelf (21) rotate, drilling equipment (4) with auxiliary device (5) all set up in on adjustable shelf (21).
3. A soft soil foundation pile hole construction equipment as claimed in claim 2,
still include drive arrangement (3), drilling equipment (4) with auxiliary device (5) are all in slide on adjustable shelf (21), and the slip direction with the axis of rotation of adjustable shelf (21) is parallel, drive arrangement (3) are used for the drive drilling equipment (4) with auxiliary device (5) are in slide on adjustable shelf (21).
4. A soft soil foundation pile hole construction equipment as claimed in claim 3,
the driving device (3) comprises a first motor (31) and a stud (32), the stud (32) is rotatably connected to the movable frame (21), the first motor (31) is used for driving the stud (32) to rotate, and the stud (32) is driven by threads to drive the drilling device (4) and the auxiliary device (5) to slide.
5. A soft soil foundation pile hole construction equipment as claimed in claim 1,
the auxiliary device (5) further comprises a second air bag (53), the extending piece (51) is used for extending into the pile hole (01), and the second air bag (53) is arranged outside the extending piece (51) in a surrounding mode;
aerating device (7) still includes second air pump (73) and second trachea (74), second air pump (73) set up in on auxiliary device (5), second trachea (74) one end with second air pump (73) intercommunication, the other end with second gasbag (53) intercommunication, second gasbag (53) aerify the back be used for with stake hole (01) inner wall butt, when second gasbag (53) and stake hole (01) inner wall butt, first gasbag (52) are located outside stake hole (01).
6. A soft soil foundation pile hole construction equipment as claimed in claim 5,
the first air pipe (72) and the second air pipe (74) are communicated with one end, close to the first driving cylinder (54), of the extending piece (51), a first air passage (512) and a second air passage (513) are formed in the extending piece (51), one end of the first air passage (512) is communicated with the first air pipe (72), the other end of the first air passage is communicated with the first air bag (52), one end of the second air passage (513) is communicated with the second air pipe (74), and the other end of the second air passage is communicated with the second air bag (53).
7. A soft soil foundation pile hole construction equipment as claimed in claim 6,
the position that stretches into piece (51) and be equipped with first gasbag (52) with second gasbag (53) all opens annular (511), first gasbag (52) with second gasbag (53) all locate the position in annular (511).
8. A soft soil foundation pile hole construction equipment as claimed in claim 7,
still including tightening rope (6), tightening rope (6) are equipped with two, one tightening rope (6) are used for around not aerifing outside first gasbag (52), another one tightening rope (6) are used for around not aerifing outside second gasbag (53), the both ends of tightening rope (6) are passed through the magic and are pasted the connection, tightening rope (6) are used for with not aerifing first gasbag (52) with second gasbag (53) are impressed in annular (511).
9. A soft soil foundation pile hole construction equipment as claimed in claim 5,
a storage device (8), the storage device (8) comprising a storage box (81), a roller (82) and a second motor (83), the containing box (81) is connected with the first driving cylinder (54), the first air pump (71) and the second air pump (73) are both arranged on the containing box (81), the first air pipe (72) and the second air pipe (74) both pass through the containing box (81), the rollers (82) are rotatably connected in the containing box (81) and are provided with four rollers, two rollers (82) are used for clamping the first air pipe (72), two rollers (82) are used for clamping the second air pipe (74), one roller (82) used for clamping the first air pipe (72) is coaxially and fixedly connected with one roller (82) used for clamping the second air pipe (74), the second motor (83) is used for driving any one roller (82) to rotate.
10. A soft soil foundation pile hole construction process comprising the soft soil foundation pile hole construction equipment of any one of claims 1 to 9, the steps of:
s1: drilling the foundation by a drilling device (4);
s2: removing the drilling device (4), and moving the auxiliary device (5) above the pile hole (01);
s3: starting a first driving cylinder (54) to insert the extending piece (51) into the annular soil heap (011);
s4: the first air pump (71) is started to inflate the first air bag (52) until the swollen first air bag (52) pushes the annular soil heap (011) outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111606128.9A CN114277794B (en) | 2021-12-25 | 2021-12-25 | Soft soil foundation pile hole construction equipment and construction technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111606128.9A CN114277794B (en) | 2021-12-25 | 2021-12-25 | Soft soil foundation pile hole construction equipment and construction technology thereof |
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| CN114277794A true CN114277794A (en) | 2022-04-05 |
| CN114277794B CN114277794B (en) | 2023-06-30 |
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| CN114277794B (en) | 2023-06-30 |
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