CN109976401A - A kind of aeration control device of inflation anchor bar - Google Patents
A kind of aeration control device of inflation anchor bar Download PDFInfo
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- CN109976401A CN109976401A CN201910323491.6A CN201910323491A CN109976401A CN 109976401 A CN109976401 A CN 109976401A CN 201910323491 A CN201910323491 A CN 201910323491A CN 109976401 A CN109976401 A CN 109976401A
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- electric current
- anchor bar
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- 238000005273 aeration Methods 0.000 title claims abstract description 21
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 24
- 235000014676 Phragmites communis Nutrition 0.000 claims description 20
- 230000033228 biological regulation Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 6
- 206010037660 Pyrexia Diseases 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 208000032963 Capsule physical issue Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The present invention provides a kind of aeration control devices of inflation anchor bar, comprising: pressure sensor is arranged in the utricule of inflation anchor bar, the gas pressure signal generated for obtaining the utricule due to inflation；Piezoelectricity converting member is connect with the pressure sensor, is converted to electric current for obtaining the gas pressure signal, and by the gas pressure signal；Electromagnetic induction part is connect with the piezoelectricity converting member, and for the electric current to be converted to magnetic field, and the electromagnetic induction part is acted according to the magnetic field；Ventilating control component is connect with the electromagnetic induction part, for being acted according to described to connect or disconnect air charging system.Inflation anchor bar air charging system of the invention can realize automatic inflating according to the intracapsular air pressure of inflation anchor bar or stop inflation, and easy to operate, construction efficiency is high, also, inner gas pressure is adjustable, realizes quantitative aerification function.
Description
Technical field
The invention belongs to inflation anchor bar technical fields, and in particular to a kind of aeration control device of inflation anchor bar.
Background technique
Inflation anchor bar is a kind of completely new anchor pole form, has economic, environmentally friendly, bearing capacity is big advantage, extensively at present
General is applied in soft work engineering.Existing weaponry and equipment cannot carry out quantitative inflation according to design atmospheric pressure value, and gas replenishment process is complete
By experience, it can not judge whether inflation anchor bar is completed to inflate；If operator can not learn the intracapsular barometric information of inflation anchor bar and
Blindness inflation is carried out, then will lead to the generation of the accidents such as quick-fried capsule or flat gas.In addition, the gas replenishment process of inflation anchor bar can only change water
Equal lower, cumbersome, the serious construction efficiency for affecting inflation anchor bar.
Summary of the invention
In order to overcome the above technical defects, the present invention provides a kind of aeration control device of inflation anchor bar, energy basis is filled
The intracapsular air pressure of gas anchor bar realizes automatic inflating or stops inflation, and easy to operate, construction efficiency is high.
To solve the above-mentioned problems, the present invention is achieved by following technical scheme:
A kind of aeration control device of inflation anchor bar, comprising:
Pressure sensor is arranged in the utricule of inflation anchor bar, the gas generated for obtaining the utricule due to inflation
Body pressure signal；
Piezoelectricity converting member is connect with the pressure sensor, for obtaining the gas pressure signal, and by the gas
Body pressure signal is converted to electric current；
Electromagnetic induction part is connect with the piezoelectricity converting member, for the electric current to be converted to magnetic field, and it is described
Electromagnetic induction part is acted according to the magnetic field；
Ventilating control component is connect with the electromagnetic induction part, for being inflated according to the movement with connecting or disconnecting
Device.
Compared with prior art, the beneficial effects of the present invention are: by the way that pressure sensing is arranged in the utricule of inflation anchor bar
Device, with the intracorporal gas pressure of real-time detection capsule, meanwhile, the gas pressure that will acquire is converted to electric current, and electric current is converted to magnetic
After, by the control in magnetic field, air charging system is connected or disconnected, has reached and opened or break according to the intracorporal gas pressure of capsule
Open inflation.
As a further improvement of the present invention, the piezoelectricity converting member includes:
The anode connection of pressure readers, one end and power supply, the other end is connect with pressure sensor, for obtaining the gas
Body pressure signal；
Piezoelectric transducer is connect with the pressure readers, is converted to the electric current for the gas pressure signal；
Transformer is connect with the piezoelectric transducer, for mentioning for the electromagnetic induction part, the piezoelectricity converting member
For operating voltage.
As a further improvement of the present invention, the electromagnetic induction part includes:
Shell, the shell are glass envelope, also, for vacuum or are filled with indifferent gas in the glass envelope
Body；
Coil, on the housing, the first end of the coil is connect with the transformer for winding；
Reed is arranged in the shell, and the first end of the reed is connect with the second end of the coil；
Normally closed, it is arranged in the shell, the normally closed first end and the second end of the reed abut against, institute
It states normally closed second end to connect with the ventilating control component, the described normally closed company disconnected according to electric current with the reed
It connects；
Normally opened, it is arranged in the shell, the normally opened first end is in be folded with the normally closed first end
Shape simultaneously has one section of gap, and the normally opened second end is connect with the ventilating control component, and described normally opened according to the electricity
Stream is connect with the reed.
Compared with prior art, the beneficial effects of the present invention are: the electric current of coil increases with the increase of gas pressure, when
After electric current increases to certain numerical value, normally opened closure, air charging system stops inflation, and the winding circle number of this exterior loop can be according to utricule
Interior air pressure is changed, if needing larger air pressure in utricule, reduces winding circle number, inflation anchor bar realization can be made precisely to fill
Gas, without human intervention.
As a further improvement of the present invention, the ventilating control component includes:
Alternating temperature structure is connect with described normally closed, described normally opened, and the electric current flows through the alternating temperature structure so that described
Deformation occurs for alternating temperature structure；
Contact structures are connect with the air charging system, and the alternating temperature structure is connect when deformation occurs with the contact structures,
So that the air charging system opens inflation.
As a further improvement of the present invention, the alternating temperature structure includes:
Composition metal heat absorbing sheet；
The lower section of the composition metal heat absorbing sheet is arranged in resistance wire, and one end is connect with normally closed second end, the other end
It is connect with the cathode of composition metal heat absorbing sheet, power supply；
Big valued resistor, one end are connect with normally opened second end, and the other end passes through the resistance wire and the compound gold
Belong to heat absorbing sheet connection；
When the electric current flows through the resistance wire, the resistance wire fever makes the composition metal heat absorbing sheet, and deformation occurs,
The composition metal heat absorbing sheet is connect with the contact structures.
As a further improvement of the present invention, the contact structures include:
Contact is contacted, the top of the composition metal heat absorbing sheet is set；
Contact chip is connect with the air charging system；
The contact contact is connect when deformation occurs for the composition metal heat absorbing sheet with the contact chip.
As a further improvement of the present invention, the invention also includes:
Regulating member is connect with the contact chip, for adjusting the distance between the contact and the contact chip.
As a further improvement of the present invention, the regulating member includes:
Counter-force bracket is arranged on the composition metal heat absorbing sheet, provides fixation for the alternating temperature structure；
Pressure regulation spin button, activity passes through the counter-force bracket, and supports to the contact chip.
As a further improvement of the present invention, threaded aperture, the pressure regulation rotation are provided on the counter-force bracket
The end of button is provided with screw thread, so that the pressure regulation spin button can be moved up and down in the counter-force bracket.
Compared with prior art, the beneficial effects of the present invention are: regulating member is adjustable between contact chip and contact contact
Distance, i.e., the inner gas pressure of adjustable inflation anchor bar allows the invention to realize and manually adjusts quantitative aerification function.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the overall structure diagram of aeration control device of the present invention；
Fig. 2 is the overall structure connection schematic diagram of aeration control device of the present invention；
Fig. 3 is the partial schematic diagram of aeration control device of the present invention
Description of symbols: 1- pressure sensor；
2- piezoelectricity converting member；21- pressure readers；22- piezoelectric transducer；23- transformer；
3- electromagnetic induction part；31- shell；32- coil；33- reed；34- normally closed；35- normally opened；
4- ventilating control component；41- alternating temperature structure；411- composition metal heat absorbing sheet；412- resistance wire；The big resistance value electricity of 413-
Resistance；
42- contact structures；421- contacts contact；422- contact chip；
5- regulating member；51- counter-force bracket；52- pressure regulation spin button；
100- utricule；101- air charging system；102- power supply.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The invention discloses a kind of aeration control devices of inflation anchor bar, as shown in Figure 1, comprising: pressure sensor 1, pressure
Electric converting member 2, electromagnetic induction part 3 and ventilating control component 4, wherein the utricule of inflation anchor bar is arranged in pressure sensor 1
In 100, the gas pressure signal that is generated for obtaining utricule 100 due to inflation；Piezoelectricity converting member 2 and pressure sensor 1
Connection, is converted to electric current for obtaining gas pressure signal, and by gas pressure signal；Electromagnetic induction part 3 and piezoelectricity are converted
Component 2 connects, and for converting electrical current into magnetic field, in the present embodiment, magnetic field strength is proportional with size of current, and electromagnetism
Induction component 3 is acted according to magnetic field；Ventilating control component 4 is connect with electromagnetic induction part 3, for according to movement to connect or break
Open air charging system.
By the way that pressure sensor 1 is arranged in the utricule 100 of inflation anchor bar, with the gas pressure in real-time detection utricule 100
Power, meanwhile, the gas pressure that will acquire is converted to electric current, after electric current is converted to magnetic field, by the control in magnetic field, fills inflation
It sets and connects or disconnects, reached and inflation is opened or disconnected according to the gas pressure in utricule 100.
Specifically, piezoelectricity converting member 2 includes: pressure readers 21, piezoelectric transducer 22 and transformer 23, pressure is read
One end of device 21 is connect with power supply 102, and the other end is connect with pressure sensor 1, for obtaining gas pressure signal, in this reality
It applies in example, pressure sensor 1 uses wireless pressure sensor, and is connect by wireless network with pressure readers 21；Piezoelectricity turns
Parallel operation 22 is connect with pressure readers 21, is converted to the electric current for gas pressure signal；Transformer 23 and piezoelectric transducer
22 connections, for providing operating voltage for electromagnetic induction part 3, piezoelectricity converting member 2.
Specifically, electromagnetic induction part 3 includes: shell 31, coil 32, reed 33, normally closed 34, normally opened 35, shell
31 be glass envelope, also, for vacuum or is filled with inert gas in glass envelope；Coil 32 is wrapped on shell 31,
The first end of coil 32 is connect with transformer 23, the winding of coil 32 circle number can according to the air pressure sets itself in utricule 100, when
When not needing hyperbar in utricule 100, then increase winding circle number, magnetic field strength is bigger, i.e. when air pressure is not very high
It can switch to normally opened, when needing in utricule 100 compared with hyperbar, then reduce winding circle number, magnetic field strength is smaller, needs in gas
When pressing higher, after electric current increases, magnetic field strength just becomes larger, and just switches to normally opened；Reed 33 is arranged in shell 31, reed 31
First end connect with the second end of coil 32；It is arranged in shell 31 for normally closed 34, normally closed 34 first end and reed 33
Second end abut against, normally closed 34 second end is connect with ventilating control component 4, normally closed 34 according to electric current disconnect and reed
33 connection；It is arranged in shell 31 for normally opened 35, normally opened 35 first end and normally closed 34 first end are in be folded shape simultaneously
There is one section of gap, normally opened 35 second end is connect with ventilating control component 4, and normally opened 35 connect according to electric current with reed 33.
The electric current of coil 32 increases with the increase of gas pressure, and after electric current increases to certain numerical value, normally opened 35 is closed
It closes, air charging system 101 stops inflation, and the winding circle number of this exterior loop 32 can be changed according to the air pressure in utricule 100, if utricule
Larger air pressure is needed in 100, then reduces winding circle number, inflation anchor bar can be made to realize precisely inflation, without human intervention.
Further, ventilating control component 44 includes: alternating temperature structure 1 and contact structures 42, alternating temperature structure 41 with normally closed
34, normally opened 35 connection, electric current flow through alternating temperature structure 41 so that alternating temperature structure 41 deformation occurs；Contact structures 42 and air charging system
101 connections, alternating temperature structure 41 are connect when deformation occurs with contact structures 42, so that air charging system 101 opens inflation.
Specifically, alternating temperature structure 41 includes: composition metal heat absorbing sheet 411, resistance wire 412, big valued resistor 413, it is compound
Sheet metal 411 is made of iron and copper, and iron is different with the thermal expansion coefficient of copper, and when composite metal 411 is heated, iron and copper all can
Expansion, copper sheet expands more severe, so that composite metal 411 is bent upwards；The setting of resistance wire 412 is absorbed heat in composition metal
The lower section of piece 411, one end are connect with normally closed 34 second end, the other end and composition metal heat absorbing sheet 411, power supply 102 it is negative
Pole connection；One end of big valued resistor 413 is connect with normally opened 35 second end, and the other end passes through resistance wire 412 and compound gold
Belong to heat absorbing sheet 411 to connect；When electric current flows through resistance wire 412, the fever of resistance wire 412 makes composition metal heat absorbing sheet 411, and deformation occurs,
Composition metal heat absorbing sheet 411 is connect with contact structures 42.
Specifically, contact structures 42 include: contact contact 421, contact chip 422, contact contact 421 is arranged in composition metal
The top of heat absorbing sheet 411；Contact chip 422 is connect with air charging system 100；Contact 421 is contacted to occur in composition metal heat absorbing sheet 421
When deformation, it is connect with contact chip 422.
Further, the invention also includes: regulating member 5 is connect with contact chip 422, for adjusting contact 421 and connecing
The distance between contact 422.
Specifically, regulating member 5 includes: counter-force bracket 51, pressure regulation spin button 52, counter-force bracket 51 is arranged in compound gold
Belong on heat absorbing sheet 411, provides fixation for regulating member 4；Pressure regulation spin button living 42 is dynamic across counter-force bracket 41, and supports to contact
Piece 422.
Further, threaded aperture is provided on counter-force bracket 51, the end of pressure regulation spin button 52 is provided with spiral shell
Line, so that pressure regulation spin button 52 can be moved up and down in counter-force bracket 51.Regulating member 5 is adjustable contact chip 422 and contact touching
The distance between point 421, i.e., the inner gas pressure of adjustable inflation anchor bar, allows the invention to realization and manually adjusts quantitative inflation
Function.
Next specific implementation process is combined to be further explained the present invention.
Previously according to the circle number for being wrapped in 31 coil 32 of shell, meanwhile, rotate clockwise or counterclockwise pressure regulation rotation by
Button 52 can play to adjust contact chip 422 at a distance from contact contact 421 and adjust the tune that air charging system 101 opens inflation
Section, when pressure readers 21 get the pressure in utricule 100 it is smaller when, the small magnetic field that coil 32 generates fail to make normally opened with
Reed 33 is in contact, at this point, reed 33 is still connect with normally closed 34, electric current flow to the cathode of power supply 102, resistance wire 412 due to
The process of electric current and generate heat, the composite metal 411 positioned at resistance wire 412 above is bent upwards, and drive is contacted and contact 421 and connect
Contact 422 connects, at this point, connecting air charging system 101, starts to inflate.
When pressure increases in utricule 100, electric current increases, and magnetic field increases, so that normally opened 35 connect with reed 33, due to
Provided with big valued resistor 413,412 calorific value of resistance wire is reduced, so that composite metal 411 restores to the original state, is filled at this point, disconnecting
Device of air 101 stops inflation.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of aeration control device of inflation anchor bar characterized by comprising
Pressure sensor is arranged in the utricule of inflation anchor bar, the gas pressure generated for obtaining the utricule due to inflation
Force signal；
Piezoelectricity converting member is connect with the pressure sensor, for obtaining the gas pressure signal, and by the gas pressure
Force signal is converted to electric current；
Electromagnetic induction part is connect with the piezoelectricity converting member, for the electric current to be converted to magnetic field, and the electromagnetism
Induction component is acted according to the magnetic field；
Ventilating control component is connect with the electromagnetic induction part, for being acted according to described to connect or disconnect air charging system.
2. aeration control device according to claim 1, which is characterized in that the piezoelectricity converting member includes:
The anode connection of pressure readers, one end and power supply, the other end is connect with pressure sensor, for obtaining the gas pressure
Force signal；
Piezoelectric transducer is connect with the pressure readers, is converted to the electric current for the gas pressure signal；
Transformer is connect with the piezoelectric transducer, for providing work for the electromagnetic induction part, the piezoelectricity converting member
Make voltage.
3. aeration control device according to claim 2, which is characterized in that the electromagnetic induction part includes:
Shell, the shell are glass envelope, also, for vacuum or are filled with inert gas in the glass envelope；
Coil, on the housing, the first end of the coil is connect with the transformer for winding；
Reed is arranged in the shell, and the first end of the reed is connect with the second end of the coil；
Normally closed, it is arranged in the shell, the normally closed first end and the second end of the reed abut against, described normal
The second end for closing piece is connect with the ventilating control component, the described normally closed connection disconnected according to electric current with the reed；
Normally opened, it is arranged in the shell, the normally opened first end and the normally closed first end are in be folded shape simultaneously
Have one section of gap, the normally opened second end is connect with the ventilating control component, described normally opened according to the electric current with
The reed connection.
4. aeration control device according to claim 3, which is characterized in that the ventilating control component includes:
Alternating temperature structure is connect with described normally closed, described normally opened, and the electric current flows through the alternating temperature structure so that the alternating temperature
Deformation occurs for structure；
Contact structures are connect with the air charging system, and the alternating temperature structure is connect when deformation occurs with the contact structures, so that
The air charging system opens inflation.
5. follow up aeration control device as claimed in claim 4, which is characterized in that the alternating temperature structure includes:
Composition metal heat absorbing sheet；
The lower section of the composition metal heat absorbing sheet is arranged in resistance wire, and one end is connect with normally closed second end, the other end and multiple
The cathode connection of alloy category heat absorbing sheet, power supply；
Big valued resistor, one end are connect with normally opened second end, and the other end is inhaled by the resistance wire and the composition metal
Backing connection；
When the electric current flows through the resistance wire, the resistance wire fever makes the composition metal heat absorbing sheet, and deformation occurs, described
Composition metal heat absorbing sheet is connect with the contact structures.
6. aeration control device according to claim 5, which is characterized in that the contact structures include:
Contact is contacted, the top of the composition metal heat absorbing sheet is set；
Contact chip is connect with the air charging system；
The contact contact is connect when deformation occurs for the composition metal heat absorbing sheet with the contact chip.
7. inflation anchor bar aeration control device according to claim 6, which is characterized in that further include:
Regulating member is connect with the contact chip, for adjusting the distance between the contact and the contact chip.
8. inflation anchor bar aeration control device according to claim 7, which is characterized in that the regulating member includes:
Counter-force bracket is arranged on the composition metal heat absorbing sheet, provides fixation for the alternating temperature structure；
Pressure regulation spin button, activity passes through the counter-force bracket, and supports to the contact chip.
9. inflation anchor bar aeration control device according to claim 8, which is characterized in that be provided on the counter-force bracket
The end of threaded aperture, the pressure regulation spin button is provided with screw thread, so that the pressure regulation spin button can be described anti-
Power bracket moves up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323491.6A CN109976401A (en) | 2019-04-22 | 2019-04-22 | A kind of aeration control device of inflation anchor bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323491.6A CN109976401A (en) | 2019-04-22 | 2019-04-22 | A kind of aeration control device of inflation anchor bar |
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| CN109976401A true CN109976401A (en) | 2019-07-05 |
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ID=67085671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910323491.6A Pending CN109976401A (en) | 2019-04-22 | 2019-04-22 | A kind of aeration control device of inflation anchor bar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155518A (en) * | 2020-01-21 | 2020-05-15 | 燕山大学 | Recyclable multifunctional anchor rod based on electromagnetic attraction and working method thereof |
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