CN111550118A - Electric wire pole buries auxiliary device for electric power construction - Google Patents
Electric wire pole buries auxiliary device for electric power construction Download PDFInfo
- Publication number
- CN111550118A CN111550118A CN202010436441.1A CN202010436441A CN111550118A CN 111550118 A CN111550118 A CN 111550118A CN 202010436441 A CN202010436441 A CN 202010436441A CN 111550118 A CN111550118 A CN 111550118A
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- China
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- electric power
- auxiliary device
- power construction
- steel base
- shaped steel
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 240000007643 Phytolacca americana Species 0.000 claims description 4
- 239000011111 cardboard Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 125000003003 spiro group Chemical group 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 17
- 238000005056 compaction Methods 0.000 abstract description 9
- 229910052573 porcelain Inorganic materials 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to the technical field of electric power construction, and particularly relates to an electric wire pole burying auxiliary device for electric power construction, which aims at solving the problem that an original vertical electric pole is easy to deflect due to soil compaction when an existing electric pole burying device is used for backfilling soil. When the C-shaped steel base is used and two sides of the opposite sides of the electric pole need to be simultaneously vibrated and compacted, the C-shaped steel base is only required to be clamped on the electric pole, and backfill soil on two sides of the C-shaped steel base is ensured to be simultaneously compacted, wherein all generated acting forces are converted into reverse rotation pressure.
Description
Technical Field
The invention relates to the technical field of electric power construction, in particular to an electric wire rod burying auxiliary device for electric power construction.
Background
With the rise of the voltage grade of high-voltage electrical equipment, the creepage distance and the insulation distance of the wire inlet and outlet porcelain bushing are increased, and the diameter and the length of the corresponding porcelain bushing are increased, for example, the diameter of the million-volt wire inlet and outlet porcelain bushing reaches more than one meter, and the length of the million-volt wire inlet and outlet porcelain bushing reaches more than ten meters. When the conducting rod is installed in the ceramic bushing with the length, the conducting rod is in a 'head-down' phenomenon, and the following two general solutions exist: one method is to add a sheath made of flexible material directly on the end of the conducting rod, and contact the inner wall of the sleeve with the sheath, which, although the sheath has a simple structure, has a large friction between the sheath and the porcelain sleeve, and during the movement of the sheath along with the conducting rod, the end of the conducting rod is often exposed from the sheath, so that the sheath does not protect the conducting rod in place.
The utility model discloses a chinese utility model patent that bulletin number is CN202363840U discloses a be used for GIS three-phase to case bus-bar conducting rod frock guide car altogether, discoid guide body and positioning disk that this guide car distributes in proper order around including, the connecting rod that guide body and positioning disk extend through around coaxial linking firmly, it is used for supplying to wait to install the conductor hole that the conducting rod passed to open on guide body and positioning disk relatively, the equipartition has several little gyro wheels on the pore wall in conductor hole, and several big gyro wheel in the periphery of guide body, but the device need the people for filling out soil after in the hole of being filled in ground, the thrust that comes from soil when filling out soil can produce thrust to the pole unavoidably, consequently can influence the vertical degree of pole.
Disclosure of Invention
The invention provides an electric wire pole burying auxiliary device for electric power construction, which is based on the technical problem that an original vertical electric wire pole is prone to deflection caused by ramming when an existing electric wire pole burying device is used for backfilling earth.
The invention provides an electric wire rod burying auxiliary device for electric power construction, which comprises a C-shaped steel base with an opening facing to the center of a circle, two sliding blocks which are centrosymmetric with each other are connected in the sliding groove of the C-shaped steel base in a sliding way, a same ejector rod is fixed between the two sliding blocks, the middle of the ejector rod is sleeved with a middle block, one side of the sliding block, which is far away from the bottom of the C-shaped steel base, is welded with a U-shaped clamping plate, and the middle parts of the two U-shaped clamping plates are respectively screwed with a positioning barrel with a downward opening and a cuboid box body structure, the inner parts of the two positioning barrels are respectively connected with a vibration motor in a sliding way, and the bottom of the positioning barrel is embedded with a sliding bearing, the sliding bearing is connected with a vibrating rod in a sliding way, the top end of the vibrating rod and the middle of the lower surface of the vibrating motor are fixed with the same buffer spring, and the top end of the buffer spring is fixed with a supporting plate seat, and the circumferential outer wall of the supporting plate seat is provided with ball grooves distributed at equal intervals.
Preferably, the upper side and the lower side of the sliding block are embedded with a third ball bearing close to four corners, and the inner wall of the C-shaped steel base is provided with an annular groove matched with the third ball bearing.
As a preferable scheme in the invention, the top end of the middle block is fixed with a poke rod, and the upper surface of the C-shaped steel base is provided with an arc-shaped guide hole matched with the outer diameter of the poke rod.
According to the preferable scheme, studs are welded on the two side plates of the positioning barrel, which are close to the U-shaped clamping plate, on the outer walls of the two opposite sides of the positioning barrel, strip-shaped holes matched with the studs are formed in the two side plates of the U-shaped clamping plate, and fastening bolts are sleeved on the outer walls of the circumferences of the studs.
According to the preferable scheme of the invention, a round hole is reserved in the middle of the upper surface of the supporting plate seat, and balls I distributed at equal intervals are embedded in the circumferential outer wall of the supporting plate seat.
In a preferred embodiment of the present invention, a cavity is reserved inside the vibrating rod.
As a preferable scheme in the invention, two L-shaped pedals which are symmetrical to each other are respectively fixed on the upper surface of the C-shaped steel base close to the outer edge of the circumference, and anti-skid lugs which are distributed equidistantly are fixed on the upper surfaces of the horizontal plates of the two L-shaped pedals.
As a preferable scheme in the invention, three pairs of vertical plates are uniformly distributed on the outer wall of one side of the C-shaped steel base, which is far away from the opening, a hinged plate is rotatably connected between each pair of two vertical plates, and a torsion spring is sleeved on the outer wall of a hinged shaft in the middle of the hinged plate.
As a preferable scheme in the invention, the bottom ends of the hinge plates are all welded with telescopic pipes, the bottom ends of the telescopic pipes are all connected with extension rods in a sliding manner, and the upper end and the lower end of each extension rod are respectively fixed with a return spring and a roller.
According to the preferable scheme, the guide blocks are fixed on the outer walls of two opposite sides of the vibration motor, and the balls II are embedded in the four corners of one side, far away from the vibration motor, of each guide block.
The beneficial effects of the invention are as follows:
1. this electric wire pole buries auxiliary device for electric power construction is two sliding blocks of central symmetry and fixes the location bucket in its side through the setting, can need shake the compaction simultaneously to the both sides of pole opposite side when using, only need with C shaped steel base joint on the pole to ensure that the backfill soil of C shaped steel base both sides carries out the compaction simultaneously, wherein the whole pressure that turn into the contrarotation of effort that generate.
2. This electric wire pole buries auxiliary device for electric power construction through setting up the downthehole double-screw bolt of sliding connection at the bar, can drive the location bucket through not hard up fastening bolt and remove or remove to the direction of keeping away from the pole to being close to middle pole when using, and then accomplish and carry out the compaction to each position of foundation ditch and shake and smash.
3. This electric wire pole buries auxiliary device for electric power construction establishes the pole of smashing that shakes of cavity through setting up, can fill in the inside of the pole of smashing that shakes with the vibrting spear of the bobbing machine of taking the tail when using for the pole of smashing that shakes can carry out the compaction to the inside on soil layer when boring into earth.
4. This electric wire pole buries auxiliary device for electric power construction, through setting up the telescopic link that articulates in C shaped steel base side, only need exert pressure in to two running-boards when can need control the pole of vibrating to stretch into in the soil when using, this moment this pressure can slowly overcome torsion spring's holding power for C shaped steel base is more and more near apart from ground, can let the pole of vibrating slowly insert in the soil.
The parts which are not involved in the device are the same as or can be realized by adopting the prior art, the structure of the invention is novel, the impact can be simultaneously carried out on two sides of the electric pole, the uniform stress on the opposite sides of the electric pole is ensured, and the possibility of deflection is reduced.
Drawings
Fig. 1 is a schematic cross-sectional view illustrating a burying auxiliary device for a wire pole for electric power construction according to the present invention;
FIG. 2 is a schematic view of an assembly structure of a shock motor of the auxiliary device for burying an electric pole for electric power construction according to the present invention;
FIG. 3 is a schematic perspective view of a U-shaped clamping plate of an auxiliary device for burying an electric pole for electric power construction according to the present invention;
fig. 4 is an enlarged schematic structural view of a burying aid for utility poles in accordance with the present invention, shown at a in fig. 1;
fig. 5 is a schematic perspective view of a slide block of the auxiliary device for burying a wire pole for electric power construction according to the present invention.
In the figure: the vibration and tamping machine comprises a 1C-shaped steel base, a 2 supporting plate base, a 201 ball I, a 3 vibration and tamping rod, a 4 buffer spring, a 5 anti-skidding lug, a 6 guide block, a 601 ball II, a 7 positioning barrel, an 8 poking rod, a 9 middle block, a 10 barrel cover, a 11 vibration motor, a 12U-shaped clamping plate, a 1201 stud, a 1202 strip-shaped hole, 1203 fastening bolts, 13 ejector rods, 14 sliding blocks, a 1401 ball III, a 15L-shaped pedal plate, a 16 hinged plate, 17 telescopic pipes, 18 return springs, 19 extension rods and 20 rollers.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, an electric wire pole burying auxiliary device for electric power construction comprises a C-shaped steel base 1 with an opening facing to the center of a circle, two sliding blocks 14 which are centrosymmetric with each other are slidably connected in a chute of the C-shaped steel base 1, a same ejector rod 13 is fixed between the two sliding blocks 14, a middle block 9 is sleeved in the middle of the ejector rod 13, a U-shaped clamping plate 12 is welded on one side of the sliding block 14 away from the bottom of the C-shaped steel base 1, positioning barrels 7 with downward opening and cuboid box structure are screwed in the middle of the two U-shaped clamping plates 12, vibrating motors 11 are slidably connected in the two positioning barrels 7, sliding bearings are embedded in the bottoms of the positioning barrels 7, vibrating rods 3 are slidably connected in the sliding bearings, a same buffer spring 4 is fixed between the top ends of the vibrating rods 3 and the lower surface of the vibrating motors 11, and a supporting plate seat 2 is fixed, and the circumference outer wall of layer board seat 2 opens the ball groove that has the equidistance and distributes to can be when can need shake the compaction simultaneously to the both sides of pole opposite side when using, only need with C shaped steel base 1 joint on the pole, and ensure that the backfill soil of C shaped steel base both sides carries out the compaction simultaneously, the effort that wherein generates all turns into reverse rotation's pressure.
According to the invention, the balls III 1401 are embedded at the upper side and the lower side of the sliding block 14 close to the four corners, and the inner wall of the C-shaped steel base 1 is provided with the annular grooves matched with the balls III 1401, so that the sliding block 14 can be ensured not to contact the bottom of the C-shaped steel base 1 as far as possible when running along an arc-shaped track in use, the shaking is reduced, and the stability of the device is improved.
Wherein, the top of middle block 9 is fixed with poker rod 8, and C shaped steel base 1, the upper surface open have with poker rod 8 external diameter looks adaptation the arc guiding hole, make things convenient for poker rod 8 to drive two sliding blocks 14 and slide in C shaped steel base 1's spout, cooperation ejector pin 13 set up can ensure that two sliding blocks 14 are centrosymmetric's position all the time, can neutralize the reaction force.
Wherein, the both sides board department that the both sides outer wall that fixes a position bucket 7 carried on the back mutually is close to U type cardboard 12 has all welded double-screw bolt 1201, and all open on the both sides board of U type cardboard 12 the bar hole 1202 with double-screw bolt 1201 looks adaptation, fastening bolt 1203 has been cup jointed to the circumference outer wall of double-screw bolt 1201 to can drive when using and fix a position bucket 7 and remove or remove to the direction of keeping away from the pole to being close to middle pole through not hard up fastening bolt 1203, and then accomplish and carry out the compaction to each position of foundation ditch and shake and smash.
Wherein, the middle part of the upper surface of the supporting plate seat 2 is reserved with a round hole, and the circumferential outer wall of the supporting plate seat 2 is embedded with balls 201 which are distributed equidistantly.
Wherein, the inside reservation of pole of vibrating 3 has the cavity to can fill in the inside of pole of vibrating 3 with the vibrting spear of the bobbing machine of taking the tail when using, make the pole of vibrating 3 can carry out the compaction to the inside of soil layer when boring into earth.
Wherein, the upper surface of C shaped steel base 1 is close to circumference outer fringe and is fixed with two L type running-boards 15 of mutual symmetry respectively, and the upper surface of two L type running-boards 15 horizontal plates all is fixed with the non-slip bump 5 that the equidistance distributes.
Wherein, the one side outer wall equipartition that C shaped steel base 1 kept away from the opening part has three pairs of perpendicular risers, and all rotates between every two perpendicular risers and is connected with articulated slab 16, and the articulated shaft outer wall in the middle of the articulated slab 16 has all cup jointed torsion spring.
Wherein, flexible pipe 17 has all been welded to the bottom of articulated slab 16, and the inside equal sliding connection in bottom of flexible pipe 17 has extension rod 19, and extension rod 19's upper and lower both ends are fixed with reset spring 18 and gyro wheel 20 respectively to can only need exert pressure in two running-boards 5 when need control the pole 3 of vibrating to stretch into in the soil when using, this pressure can slowly overcome torsion spring's holding power this moment, make C shaped steel base 1 more and more near apart from ground, can let the pole 3 of vibrating slowly insert in the soil.
Wherein, the outer wall of the both sides that shock dynamo 11 carried on the back mutually all is fixed with guide block 6, and the one side that shock dynamo 11 was kept away from to guide block 6 is close to four corners department and all inlays and be equipped with ball two 601.
When the electric pole is used and two sides of the opposite sides of the electric pole are simultaneously vibrated and compacted, the C-shaped steel base 1 is only required to be clamped on the electric pole, so that the electric pole just falls on the center of the C-shaped steel base 1, backfill on two sides of the C-shaped steel base 1 is ensured to be compacted simultaneously, and all generated acting forces are converted into reversely rotating pressure; then starting the vibration motors 11 in the two positioning barrels 7, and matching with the buffer spring 4, the high-frequency vibration force can be slowly transmitted to the loose soil on the ground, so that the figures around the telegraph pole are tamped; need control when vibrating rod 3 stretches into in to the soil only need to exert pressure in two running-boards 5, this pressure can slowly overcome torsion spring's holding power this moment for C shaped steel base 1 is more and more close apart from ground, can let vibrating rod 3 slowly insert in the soil.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides an electric wire pole buries auxiliary device for electric power construction, includes C shaped steel base (1) of opening towards the center centre of a circle, sliding connection has two sliding blocks (14) that are central symmetry mutually in the spout of C shaped steel base (1), its characterized in that, two be fixed with same ejector pin (13) between sliding block (14), intermediate mass (9) have been cup jointed in the centre of ejector pin (13), U type cardboard (12) have all been welded to one side that C shaped steel base (1) tank bottom was kept away from in sliding block (14), and the equal spiro union of centre of two U type cardboards (12) has the opening to be location bucket (7) of cuboid box structure downwards, two the equal sliding connection in inside of location bucket (7) has shock dynamo (11), and the bottom of location bucket (7) inlays and is equipped with slide bearing, and sliding connection has pole (3) of smashing, the vibrating rod is characterized in that the same buffer spring (4) is fixed between the top end of the vibrating rod (3) and the lower surface of the vibrating motor (11), the supporting plate seat (2) is fixed at the top end of the buffer spring (4), and ball grooves distributed equidistantly are formed in the outer wall of the circumference of the supporting plate seat (2).
2. The burying auxiliary device for the electric wire pole for electric power construction as claimed in claim 1, wherein the upper and lower sides of the sliding block (14) are embedded with three balls (1401) near the four corners, and the inner wall of the C-shaped steel base (1) is provided with annular grooves adapted to the three balls (1401).
3. The burying auxiliary device for the electric wire pole for the electric power construction as claimed in claim 1, wherein the top end of the middle block (9) is fixed with the poke rod (8), and the upper surface of the C-shaped steel base (1) is provided with an arc-shaped guide hole matched with the outer diameter of the poke rod (8).
4. The wire rod burying auxiliary device for electric power construction as claimed in claim 1, wherein studs (1201) are welded to two side plates of the U-shaped clamp plate (12) on two opposite side outer walls of the positioning barrel (7), strip-shaped holes (1202) matched with the studs (1201) are formed in the two side plates of the U-shaped clamp plate (12), and fastening bolts (1203) are sleeved on the circumferential outer wall of the studs (1201).
5. The wire rod burying auxiliary device for electric power construction as claimed in claim 1, wherein a circular hole is reserved in the middle of the upper surface of the supporting plate seat (2), and balls (201) are embedded in the circumferential outer wall of the supporting plate seat (2) and distributed at equal intervals.
6. The burying auxiliary device for the electric wire pole for electric power construction as claimed in claim 5, wherein a cavity is reserved inside said vibrating rod (3).
7. The wire rod burying auxiliary device for electric power construction as claimed in claim 1, wherein two L-shaped pedals (15) symmetrical to each other are respectively fixed on the upper surface of said C-shaped steel base (1) near the outer edge of the circumference, and the anti-slip protrusions (5) are fixed on the upper surface of the horizontal plate of the two L-shaped pedals (15) and are distributed equidistantly.
8. The wire rod burying auxiliary device for electric power construction as claimed in claim 7, wherein three pairs of vertical plates are uniformly distributed on the outer wall of one side of the C-shaped steel base (1) away from the opening, a hinge plate (16) is rotatably connected between each pair of vertical plates, and a torsion spring is sleeved on the outer wall of a hinge shaft in the middle of the hinge plate (16).
9. The wire rod burying auxiliary device for electric power construction as claimed in claim 8, wherein telescopic pipes (17) are welded to the bottom ends of the hinge plates (16), extension rods (19) are slidably connected to the insides of the bottom ends of the telescopic pipes (17), and a return spring (18) and a roller (20) are respectively fixed to the upper end and the lower end of each extension rod (19).
10. The wire rod burying auxiliary device for electric power construction as claimed in claim 1, wherein the outer walls of two opposite sides of the vibrating motor (11) are fixed with guide blocks (6), and the side of the guide blocks (6) far away from the vibrating motor (11) close to four corners are embedded with balls II (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436441.1A CN111550118B (en) | 2020-05-21 | 2020-05-21 | Electric wire pole buries auxiliary device for electric power construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436441.1A CN111550118B (en) | 2020-05-21 | 2020-05-21 | Electric wire pole buries auxiliary device for electric power construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111550118A true CN111550118A (en) | 2020-08-18 |
| CN111550118B CN111550118B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010436441.1A Active CN111550118B (en) | 2020-05-21 | 2020-05-21 | Electric wire pole buries auxiliary device for electric power construction |
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| Country | Link |
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| CN (1) | CN111550118B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115874854A (en) * | 2022-10-25 | 2023-03-31 | 国网河南省电力公司新县供电公司 | Telegraph pole dismantling and transferring device, telegraph pole dismantling method and telegraph pole installing method |
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| KR20160026596A (en) * | 2014-08-29 | 2016-03-09 | 한우선 | An deep wing mixing vibratinal agitator for hardening ground and the deep wing mixing method thereof |
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| CN111550118B (en) | 2021-11-16 |
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Inventor after: Wang Chengcheng Inventor after: Xu Huanhuan Inventor after: Li Keliang Inventor after: He Qiangfeng Inventor after: He Xuefeng Inventor before: He Xuefeng |
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Effective date of registration: 20211027 Address after: 322200 No. 201 Hengchang Avenue, Xianhua street, Pujiang County, Jinhua City, Zhejiang Province Applicant after: Pujiang power supply company of State Grid Zhejiang Electric Power Co.,Ltd. Applicant after: JINHUA POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before: School of physics and electronic engineering, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan new area, Xuzhou, Jiangsu 221116 Applicant before: He Xuefeng |
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