CN112412171A - Interim protective equipment is used in municipal construction - Google Patents

Interim protective equipment is used in municipal construction Download PDF

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Publication number
CN112412171A
CN112412171A CN202011326773.0A CN202011326773A CN112412171A CN 112412171 A CN112412171 A CN 112412171A CN 202011326773 A CN202011326773 A CN 202011326773A CN 112412171 A CN112412171 A CN 112412171A
Authority
CN
China
Prior art keywords
driving
protective
supporting component
protective net
guide block
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.)
Pending
Application number
CN202011326773.0A
Other languages
Chinese (zh)
Inventor
黄克政
王建芳
姚利锋
张成会
刘国强
郭帅辉
赵纪伟
张坤
谢中杰
杨振锋
卢来要
侯健磊
弋朝营
俞平卫
郑富克
张赵波
高继卫
方爱琴
丁宽宽
张汉松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Province Installation Group Co Ltd
Original Assignee
Henan Province Installation Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henan Province Installation Group Co Ltd filed Critical Henan Province Installation Group Co Ltd
Priority to CN202011326773.0A priority Critical patent/CN112412171A/en
Publication of CN112412171A publication Critical patent/CN112412171A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00Fencing, e.g. fences, enclosures, corrals
    • E04H17/14Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/16Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00Fencing, e.g. fences, enclosures, corrals
    • E04H17/14Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/16Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
    • E04H17/165Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using panels with rigid filling and frame
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00Fencing, e.g. fences, enclosures, corrals
    • E04H17/14Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/20Posts therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00Fencing, e.g. fences, enclosures, corrals
    • E04H17/14Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/20Posts therefor
    • E04H17/22Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

The invention relates to the field of protective equipment for municipal construction, in particular to temporary protective equipment for municipal construction, which comprises a first protective net supporting component, a second protective net supporting component, a buckle, a connecting piece, a protective net and a protective net side frame, the first protective screening supporting component and the second protective screening supporting component are used for stably supporting the protective screening side frame, the first protective screening supporting component and the second protective screening supporting component are of the same structure, the invention can carry out stable protection operation on two sides of the groove in the municipal construction operation process mainly through the cooperation of the first protective screening supporting component, the second protective screening supporting component, the protective screening and the protective screening side frame, and then make municipal construction personnel can carry out the construction operation in a safe and stable environment, very big assurance municipal construction operation personnel's operation environmental safety.

Description

Interim protective equipment is used in municipal construction
Technical Field
The invention relates to the field of protective equipment for municipal construction, in particular to temporary protective equipment for municipal construction.
Background
In China, municipal infrastructure refers to various buildings, structures, equipment and the like which are arranged in planning and construction ranges of urban areas and towns (villages) and provide paid or unpaid public products and services for residents based on government responsibilities and obligations. Various public infrastructure construction supporting in urban life all belong to municipal works category, for example common urban road, bridge, subway, underground pipeline, tunnel, river course, track traffic, sewage treatment, refuse treatment processing etc. engineering, for example again with the life closely relevant various pipelines: rainwater, sewage, water supply, reclaimed water, electric power (parts except red lines), telecommunication, heating power, gas and the like, and construction of squares, urban greening and the like belong to the municipal engineering category.
Because the municipal works period of a project requires to be generally urgent, and various pipe networks in the municipal works are longitudinal and transverse, the geological strata are complex and changeable, the phenomena of soft geology or unstable strata and the like can be generally generated in the municipal construction process, so that the soil layers collapse, harm is brought to construction operators, especially, the conditions that the soil layers on two sides collapse are frequently generated in the construction of grooves with deep depths, the working safety of the operators is greatly influenced, and the normal municipal construction progress is influenced.
Disclosure of Invention
The invention aims to provide temporary protection equipment for municipal construction, which can be used for stably and safely protecting a construction soil layer in the municipal construction process, so that the working safety of construction operators is ensured, and the left side of the municipal construction is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
a temporary protective device for municipal construction comprises a first protective screening support component, a second protective screening support component, a buckle, a connecting piece, a protective screening and a protective screening side frame, the first protective screening supporting component and the second protective screening supporting component are used for stably supporting the protective screening side frame, the first protective screening supporting component and the second protective screening supporting component are both composed of the same structure, the first protective screening supporting component and the second protective screening supporting component are provided with buckles, the protective screening side frame is a hollow square frame structure, the protective net is arranged in the protective net side frame and is fixedly connected with the protective net side frame, the outside of the protective net side frame is fixedly provided with a connecting piece, the protective net side frame is respectively connected with the buckles on the first protective net supporting component and the second protective net supporting component through the connecting pieces.
The first protective net supporting component and the second protective net supporting component mainly comprise a supporting base, a mounting and supporting shell, a tip drill bit, a driving rotating shaft, a spiral auger, a mounting bearing, a first guide block, a second guide block and a rotary driving wrench component, wherein the mounting and supporting shell is mounted on the supporting base and fixedly connected with the supporting base, a hollow cavity structure with openings at two ends is arranged in the mounting and supporting shell, a first guide groove and a second guide groove are formed in two side walls of the hollow cavity structure, the first guide block is mounted in the first guide groove and connected with the first guide groove, the second guide block is mounted in the second guide groove and connected with the second guide groove, the outer part of the mounting bearing is mounted on the first guide block and the second guide block and fixedly connected with the first guide block and the second guide block respectively, the upper portion of drive pivot install the bearing inner race position of installation bearing and link to each other in the bearing inner race interference fit of installation bearing, top drill bit install the bottom position of drive pivot and with drive the fixed linking to each other in pivot bottom, the spiral auger install the outside position of driving the pivot and with drive the pivot fixed linking to each other for drive pivot pivoted rotation drive spanner subassembly install the top position of driving the pivot and with drive the pivot continuous.
The rotary driving wrench assembly is composed of a driving chuck, a driving arm and a driving rod, the driving chuck is installed at the bottom of the driving arm and fixedly connected with the bottom of the driving arm, a through hole is radially formed in the driving arm, and one side end of the driving rod is installed in the through hole in the driving arm and connected with the through hole.
The top of the driving rotating shaft is provided with a square groove used for driving the chuck to be installed, the outline of the driving chuck is of a square structure, and the inner outline of the square groove is consistent with the outline of the driving chuck and larger than the outline of the driving chuck.
The buckle is arranged at the outer side part of the mounting and supporting shell and is fixedly connected with the mounting and supporting shell.
Furthermore, in order to reduce the overall mass of the driving rotating shaft, the inner shell of the driving rotating shaft is processed into a hollow cylindrical cavity structure.
Furthermore, in order to ensure the balance weight and stability of the supporting base, the supporting base can be cast by cast iron.
Furthermore, a through hole is processed in the supporting base, an anchor screw is installed in the through hole, and the anchor screw is installed in the through hole to fix the position of the supporting base.
Furthermore, the first guide block and the second guide block are the same structural body, the first guide block and the second guide block are symmetrically arranged on the outer wall of the mounting bearing and fixedly connected with the mounting bearing, and the first guide groove and the second guide groove are of the same groove-shaped structure.
The invention has the beneficial effects that: the invention has scientific integral structure design and simple and convenient installation, operation and use processes, and can carry out stable protection operation on two sides of the groove in the municipal construction operation process mainly through the combined cooperation of the first protective net supporting component, the second protective net supporting component, the buckle, the connecting piece, the protective net and the protective net side frame, so that municipal constructors can carry out construction operation in a safe and stable environment, the safety of the operation environment of the municipal construction operators is greatly ensured, the damage to the constructors caused by the collapse of soil on two sides of the groove is avoided, the operation period of the municipal construction operation is further ensured, and the protection requirement for use in the construction operation is met.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of a first protective net supporting component and a second protective net supporting component in the invention;
FIG. 3 is a schematic view of the installation structure of the center drill, the driving rotating shaft and the spiral auger in the present invention;
FIG. 4 is a schematic view of the installation structure of the driving shaft in the installation support housing according to the present invention;
FIG. 5 is a schematic view of the rotary wrench assembly of the present invention;
FIG. 6 is a schematic view of the support base of the present invention;
FIG. 7 is a state diagram one of the present invention in particular use;
FIG. 8 is a state diagram two of the present invention in particular use;
the reference numbers in the figures are: 1-a first protective screening supporting component, 2-a second protective screening supporting component, 3-buckles, 4-connectors, 5-protective screening, 6-protective screening side frame, 7-supporting base, 8-mounting supporting shell, 9-top drill bit, 10-driving rotating shaft, 11-spiral auger, 12-mounting bearing, 13-first guide block, 14-second guide block, 15-rotation driving spanner component, 16-hollow cavity structure, 17-first guide groove, 18-second guide groove, 19-driving chuck, 20-driving arm, 21-driving rod, 22-through hole, 23-square groove, 24-through hole, 25-foundation screw, 26-groove side soil layer and 27-groove bottom soil layer.
Detailed Description
Specific example 1: the core of the invention is to provide temporary protection equipment for municipal construction, which mainly utilizes the cooperative action of a first protective net support component 1, a second protective net support component 2, a buckle 3, a connecting piece 4, a protective net 5 and a protective net side frame 6, so that the temporary protection equipment can perform stable protection operation on two sides of a groove in the municipal construction operation process, and further enables municipal construction personnel to perform construction operation in a safe and stable environment. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used in this specification to denote orientation are used with reference to a particular structure shown in the drawings, and do not constitute a limitation on the structure. As shown in the attached fig. 1-7 of the specification, a temporary protection device for municipal construction mainly comprises a first protection net support component 1, a second protection net support component 2, a buckle 3, a connecting piece 4, a protection net 5 and a protection net side frame 6, wherein the first protection net support component 1 and the second protection net support component 2 are arranged at two sides of the protection net 5 for stably supporting the protection net side frame 6, the first protection net support component 1 and the second protection net support component 2 are the same structure, the buckle 3 for connecting the connecting piece 4 is arranged on the first protection net support component 1 and the second protection net support component 2, the protection net side frame 6 for installing the protection net 5 is a hollow square frame structure (mainly for installing and supporting the protection net 5), the protection net 5 for protecting the soil layers at two sides of a groove is arranged in the side protection net frame 6 and is fixedly connected with the protection net side frame 6, the connecting piece 4 is fixedly installed outside the protective net side frame 6, the protective net side frame 6 is respectively connected with the buckles 3 on the first protective net supporting component 1 and the second protective net supporting component 2 through the connecting piece 4, the first protective net supporting component 1 and the second protective net supporting component 2 mainly comprise a supporting base 7, an installation supporting shell 8, a tip drill bit 9, a driving rotating shaft 10, a spiral auger 11, an installation bearing 12, a first guide block 13, a second guide block 14 and a rotary driving wrench set 15, the installation supporting shell 8 for installing and supporting the driving rotating shaft 10 is fixedly installed on the supporting base 7, in order to ensure the balance weight and stability of the supporting base 7, the supporting base 7 can be integrally cast by cast iron, a hollow cavity structure 16 with openings at two ends is arranged in the installation supporting shell 8, and first guide guides for installing the first guide block 13 and the second guide block 14 are arranged on two side walls of the hollow cavity structure 16 in the installation supporting shell 8 A guide groove 17 and a second guide groove 18, a first guide block 13 for installing, supporting and guiding the installation bearing 12 is installed in the first guide groove 17 and connected with the first guide groove 17, a second guide block 14 for installing, supporting and guiding the installation bearing 12 is installed in the second guide groove 18 and connected with the second guide groove 18, it should be noted that the first guide block 13 and the second guide block 14 are the same structure, the first guide block 13 and the second guide block 14 are symmetrically and fixedly installed on the outer wall of the installation bearing 12 and fixedly connected with the installation bearing 12, the first guide groove 17 and the second guide groove 18 are the same groove structure, the outer part of the installation bearing 12 is fixedly installed on the first guide block 13 and the second guide block 14, the upper part of the driving rotating shaft 10 for driving the spiral auger 11 and the tip drill bit 9 to rotate is installed on the bearing inner ring part of the installation bearing 12 and connected with the inner ring of the installation bearing 12 in an interference fit manner, the tip drill bit 9 is fixedly arranged at the bottom part of the driving rotating shaft 10, the spiral auger 11 is fixedly arranged at the outer part of the driving rotating shaft 10, the rotary driving wrench assembly 15 for driving the driving rotating shaft 10 to rotate is arranged at the top part of the driving rotating shaft 10 and is connected with the driving rotating shaft 10, the rotary driving wrench assembly 15 consists of a driving chuck 19, a driving arm 20 and a driving rod 21, the driving chuck 19 for driving the driving rotating shaft 10 to rotate is fixedly arranged at the bottom part of the driving arm 20, a through hole 22 for mounting the driving rod 21 is radially arranged at the upper part of the driving arm 20, the outer contour of the through hole 22 is slightly larger than that of the driving rod 21, one end part of the driving rod 21 is arranged in the through hole 22 on the driving arm 20, a square groove 23 for mounting the driving chuck 19 is arranged at the top part of the driving rotating shaft, the internal contour of the square groove 23 is consistent with the external contour of the driving chuck 19 and is larger than the external contour of the driving chuck 19, the specific operation and use process of the invention is that firstly, the first protective net supporting component 1 and the second protective net supporting component 2 are placed on the soil layer 27 at the bottom of the groove in the construction groove to be protected, at this time, the length of the protective net 5 can be selected according to the length of the groove to be protected, after the above steps are completed, an operator can firstly fix the position of the first protective net supporting component 1 for installing and supporting one end of the protective net 5, the specific process is that, as shown in the attached figure 7 of the specification, the operator can rotate the driving rod 21 in the driving wrench component 15 clockwise to drive the driving arm 20 to rotate clockwise, at this time, the driving arm 20 drives the driving chuck 19 fixedly installed at the lower part thereof to rotate clockwise, the driving chuck 19 is buckled in a square groove 23 on the driving rotating shaft 10, the driving rotating shaft 10 can be driven to rotate when the driving chuck 19 rotates, at the moment, the driving rotating shaft 10 rotates in the mounting bearing 12 and drives the tip drill bit 9 and the spiral auger 11 at the lower part to rotate, at the moment, under the action of the spiral thrust of the rotation of the spiral auger 11, the driving rotating shaft 10 is driven to downwards enter the ground and deepen towards the ground, in the process, the first guide block 13 and the second guide block 14 at the two sides of the mounting bearing 12 only play a role in supporting and guiding the mounting bearing 12 on the mounting bearing 12 and the driving rotating shaft 10 play a role in supporting and rotating the mounting bearing 12 under the guiding action of the first guide groove 17 and the second guide groove 18, when the drill bit 9 deepens into the ground to a certain depth (determined according to the specific geological tip loose soil layer hardness), at the moment, after the fixing operation of the first protective net supporting component 1 is finished, next, the position of the second protective net supporting component 2 can be stably operated as the first protective net supporting component 1, the specific operation process is consistent with the operation process of the first protective net supporting component 1, after the steps are completed, an operator can install the protective net side frame 6 provided with the protective net 5 on the buckles 3 on the first protective net supporting component 1 and the second protective net supporting component 2 through the connecting piece 4, so far, the protection of the groove side soil layer 26 in municipal construction operation is completed, and the constructor can safely perform construction operation under the protection of the temporary protection equipment.
Specific example 2: in order to provide more excellent use effect of the present invention in specific operation and use, in the present invention, as shown in fig. 8 of the specification, through holes 24 are formed in the support base, anchor screws 25 are installed in the through holes 24, the anchor screws 25 are installed in the through holes 24 to fix the position of the support base 7, and the length of the anchor screws 25 can be selected according to specific geological conditions in specific use. The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims (9)

1. A temporary protective device for municipal construction is characterized by comprising a first protective net supporting component, a second protective net supporting component, a buckle, a connecting piece, a protective net and a protective net side frame, the first protective screening supporting component and the second protective screening supporting component are used for stably supporting the protective screening side frame, the first protective screening supporting component and the second protective screening supporting component are both composed of the same structure, the first protective screening supporting component and the second protective screening supporting component are provided with buckles, the protective screening side frame is a hollow square frame structure, the protective net is arranged in the protective net side frame and is fixedly connected with the protective net side frame, the outside of the protective net side frame is fixedly provided with a connecting piece, the protective net side frame is respectively connected with the buckles on the first protective net supporting component and the second protective net supporting component through the connecting pieces.
2. The temporary protection device for municipal construction according to claim 1, wherein the first protective net support assembly and the second protective net support assembly both comprise a support base, a mounting support housing, a tip drill, a driving rotating shaft, a spiral auger, a mounting bearing, a first guide block, a second guide block and a rotary driving wrench assembly, the mounting support housing is mounted on the support base and fixedly connected with the support base, a hollow cavity structure with openings at two ends is arranged in the mounting support housing, the two side walls of the hollow cavity structure are provided with the first guide groove and the second guide groove, the first guide block is mounted in the first guide groove and connected with the first guide groove, the second guide block is mounted in the second guide groove and connected with the second guide groove, the mounting bearing is externally mounted on the first guide block and the second guide block and fixedly connected with the first guide block and the second guide block respectively The upper portion of the driving rotating shaft is arranged at the position of a bearing inner ring of the mounting bearing and is connected with the bearing inner ring of the mounting bearing in an interference fit manner, the top drill bit is arranged at the bottom of the driving rotating shaft and is fixedly connected with the bottom of the driving rotating shaft, the spiral auger is arranged at the outer part of the driving rotating shaft and is fixedly connected with the driving rotating shaft, and the spiral auger is used for driving the rotating driving wrench assembly to rotate and drive the rotating shaft to be arranged at the top of the driving rotating shaft and is connected with the driving rotating shaft.
3. The temporary protection apparatus for municipal construction according to claim 2, wherein the rotary driving wrench assembly comprises a driving chuck, a driving arm and a driving rod, the driving chuck is mounted at the bottom of the driving arm and is fixedly connected to the bottom of the driving arm, the driving arm is radially provided with a through hole, and one side end of the driving rod is mounted in the through hole of the driving arm and is connected to the through hole.
4. The temporary protection device for municipal construction according to claim 2, wherein a square groove for mounting the driving chuck is formed at the top of the driving rotating shaft, the outer contour of the driving chuck is of a square structure, and the inner contour of the square groove is consistent with the outer contour of the driving chuck and larger than the outer contour of the driving chuck.
5. The temporary protection apparatus for municipal construction according to claim 2, wherein the clip is mounted on an outer side of the mounting support housing and is fixedly connected to the mounting support housing.
6. The temporary protection equipment for municipal construction according to claim 2, further comprising an inner shell of the driving shaft formed into a hollow cylindrical cavity to reduce the overall mass of the driving shaft.
7. The temporary protection equipment for municipal construction according to claim 2, further comprising a support base made of cast iron for weight and stability.
8. The temporary protection equipment for municipal construction according to claim 2, further comprising a through hole formed in the support base, wherein an anchor screw is installed in the through hole, and the anchor screw is installed in the through hole to fix the position of the support base.
9. The temporary protection apparatus for municipal construction according to claim 2, further characterized in that the first guide block and the second guide block are the same structure, the first guide block and the second guide block are symmetrically installed on the outer wall of the installation bearing and fixedly connected with the installation bearing, and the first guide groove and the second guide groove are the same groove structure.
CN202011326773.0A 2020-11-24 2020-11-24 Interim protective equipment is used in municipal construction Pending CN112412171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011326773.0A CN112412171A (en) 2020-11-24 2020-11-24 Interim protective equipment is used in municipal construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011326773.0A CN112412171A (en) 2020-11-24 2020-11-24 Interim protective equipment is used in municipal construction

Publications (1)

Publication Number Publication Date
CN112412171A true CN112412171A (en) 2021-02-26

Family

ID=74778469

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011326773.0A Pending CN112412171A (en) 2020-11-24 2020-11-24 Interim protective equipment is used in municipal construction

Country Status (1)

Country Link
CN (1) CN112412171A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205822071U (en) * 2016-07-22 2016-12-21 王刚 A kind of municipal road construction assembly all-in-one
CN206667919U (en) * 2017-04-11 2017-11-24 郭杰 Protection network is used safely in a kind of municipal works
CN207633853U (en) * 2017-12-19 2018-07-20 绥化学院 A kind of tents fixing-aid device
CN209040675U (en) * 2018-08-21 2019-06-28 李亚萍 Gardens protective fence
CN209384765U (en) * 2018-12-06 2019-09-13 北京市绿欣园林绿化有限责任公司 Gardens guardrail
CN209457508U (en) * 2019-01-23 2019-10-01 黄汉斌 A kind of bridge construction protective fence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205822071U (en) * 2016-07-22 2016-12-21 王刚 A kind of municipal road construction assembly all-in-one
CN206667919U (en) * 2017-04-11 2017-11-24 郭杰 Protection network is used safely in a kind of municipal works
CN207633853U (en) * 2017-12-19 2018-07-20 绥化学院 A kind of tents fixing-aid device
CN209040675U (en) * 2018-08-21 2019-06-28 李亚萍 Gardens protective fence
CN209384765U (en) * 2018-12-06 2019-09-13 北京市绿欣园林绿化有限责任公司 Gardens guardrail
CN209457508U (en) * 2019-01-23 2019-10-01 黄汉斌 A kind of bridge construction protective fence

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Application publication date: 20210226

RJ01 Rejection of invention patent application after publication