CN112268797B - All-round comprehensive detector in tunnel - Google Patents
All-round comprehensive detector in tunnel Download PDFInfo
- Publication number
- CN112268797B CN112268797B CN202011073598.9A CN202011073598A CN112268797B CN 112268797 B CN112268797 B CN 112268797B CN 202011073598 A CN202011073598 A CN 202011073598A CN 112268797 B CN112268797 B CN 112268797B
- Authority
- CN
- China
- Prior art keywords
- arc
- shaped
- plate
- shaped plate
- tunnel
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Geophysics And Detection Of Objects (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides an omnibearing comprehensive detector for a tunnel, which comprises a left arc-shaped plate, a right arc-shaped plate and a protection plate, wherein one end of the left arc-shaped plate is provided with an arc-shaped telescopic groove, the inner side wall of the arc-shaped telescopic groove, which is far away from an opening end, is fixedly connected with a strong spring, an arc-shaped movable seat is movably arranged in the arc-shaped telescopic groove, one side of the arc-shaped movable seat is fixedly connected with the strong spring, the omnibearing comprehensive detector for the tunnel is reasonable in design, an arc-shaped telescopic pressing plate at one end of the right arc-shaped plate can be stretched in the arc-shaped telescopic groove at one end of the left arc-shaped plate, so that the numerical value of a pressure sensor is changed, whether two sides of a tunnel gap move or not can be detected through analyzing pressure change, the safety of the tunnel is detected, and the pressure sensor is connected with the inner side wall of the arc-shaped telescopic groove through the strong spring, so that the pressure sensor has certain flexibility, thereby enabling to avoid damage of the pressure sensor.
Description
Technical Field
The invention belongs to the technical field of tunnel detection, and particularly relates to an omnibearing comprehensive tunnel detector.
Background
The tunnel is an engineering building buried in the stratum, is a form of utilizing underground space, and the tunnel is of various types, and the tunnel inner wall is provided with more linear gaps, and in the using process, if the tunnel inner wall is influenced by factors such as thermal expansion and cold contraction, the plates on the two sides of the gaps can move to a certain extent, and when the moving range is too large, the safety of the tunnel is not enough.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the comprehensive tunnel detector which is reasonable in design, the arc-shaped telescopic pressing plate at one end of the right arc-shaped plate can be stretched in the arc-shaped telescopic groove at one end of the left arc-shaped plate, so that the numerical value of the pressure sensor is changed, whether the two sides of the gap of the tunnel move or not can be detected through analyzing the pressure change, and the safety of the tunnel is detected.
In order to achieve the purpose, the invention is realized by the following technical scheme: an omnibearing comprehensive tunnel detector comprises a left arc-shaped plate, a right arc-shaped plate and a protection plate, wherein one end of the left arc-shaped plate is provided with an arc-shaped telescopic groove, a strong spring is fixedly connected on the inner side wall of the arc-shaped telescopic groove far away from the opening end, an arc-shaped movable seat is movably arranged in the arc-shaped telescopic groove, one side of the arc-shaped movable seat is fixedly connected with a strong spring, the other side of the arc-shaped movable seat is fixedly provided with a pressure sensor, one end of the right arc-shaped plate is fixedly provided with an arc-shaped telescopic pressing plate, one end of the arc-shaped telescopic pressing plate penetrates through the opening end of the arc-shaped telescopic groove and is contacted with the pressure sensor, the bottoms of the left arc-shaped plate and the right arc-shaped plate are both fixedly provided with a laser detection device, the laser detection device comprises a mounting seat and a fixed seat, and the front side and the rear side of the mounting seat are respectively and fixedly provided with a laser transmitter and a laser receiver.
As a preferred embodiment of the invention, the protection plate is placed at the top of the joint of the left arc-shaped plate and the right arc-shaped plate, the bottom of the protection plate is fixedly provided with a sliding seat, the top of the left arc-shaped plate and the top of the right arc-shaped plate are both provided with sliding grooves at positions corresponding to the sliding seats, and the sliding seats are positioned in the sliding grooves.
In a preferred embodiment of the present invention, the number of the strong springs is 4.
As a preferred embodiment of the invention, the protection plate, the left arc-shaped plate and the right arc-shaped plate are all provided with a plurality of fixing screw holes.
In a preferred embodiment of the present invention, the left arc-shaped plate and the right arc-shaped plate have the same shape and size.
As a preferred embodiment of the present invention, the center lines of the laser transmitter and the laser receiver are on the same straight line.
The invention has the beneficial effects that: the invention discloses an omnibearing comprehensive tunnel detector which comprises a left arc-shaped plate, a right arc-shaped plate, a protection plate, an arc-shaped telescopic groove, a strong spring, an arc-shaped movable seat, a pressure sensor, an arc-shaped telescopic pressing plate, a laser detection device, an installation seat, a fixed seat, a laser transmitter, a laser receiver, a sliding groove, a sliding seat and a fixed screw hole.
1. The flexible clamp plate of arc of this all-round comprehensive detector in tunnel's right arc one end can stretch out and draw back in the flexible inslot of arc of left arc one end to make pressure sensor's numerical value change, whether can detect out the both sides of tunnel gap department through the analysis to pressure variation and move, thereby detect the security in tunnel, and, pressure sensor passes through the powerful spring and is connected with the inside wall in the flexible inslot of arc, make pressure sensor have certain elasticity, thereby can avoid pressure sensor impaired.
2. Laser detection device has all been installed to the bottom of this all-round comprehensive detector's in tunnel left arc and right arc, laser detection device has laser emission function and laser receiving function, on the one hand, the laser of laser emitter transmission can form the laser marking in the tunnel, be favorable to the current safety in tunnel and experience and feel, on the other hand, when laser emitter's laser line skew the laser receiver of another detector, the plate motion of explanation gap both sides is obvious, the security in tunnel has reduced to a certain extent.
3. This all-round comprehensive detector's in tunnel guard plate can protect the gap department of left arc and right arc, and the water that avoids condensing drips to gap department to avoid the part to damage, improve life, and the guard plate passes through the spout to be connected with left arc and right arc with the slide cooperation, does not influence the motion of left arc and right arc.
Drawings
FIG. 1 is a schematic structural diagram of an omnidirectional comprehensive tunnel detector;
FIG. 2 is a schematic view of a connection between a left arc-shaped plate and a right arc-shaped plate of the comprehensive tunnel detector;
FIG. 3 is a schematic view of a laser detection device of the comprehensive detector for tunnel omni-bearing;
FIG. 4 is a schematic cross-sectional view of an omnidirectional comprehensive tunnel detector;
in the figure: 1. a left arc-shaped plate; 2. a right arc-shaped plate; 3. a protection plate; 4. an arc-shaped telescopic groove; 5. a strong spring; 6. an arc movable seat; 7. a pressure sensor; 8. an arc-shaped telescopic pressing plate; 9. a laser detection device; 10. a mounting base; 11. a fixed seat; 12. a laser transmitter; 13. a laser receiver; 14. a chute; 15. a slide base; 16. and fixing the screw hole.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: an omnibearing comprehensive tunnel detector comprises a left arc-shaped plate 1, a right arc-shaped plate 2 and a protection plate 3, wherein one end of the left arc-shaped plate 1 is provided with an arc-shaped telescopic groove 4, the inner side wall of the arc-shaped telescopic groove 4 far away from an opening end is fixedly connected with a powerful spring 5, an arc-shaped movable seat 6 is movably arranged in the arc-shaped telescopic groove 4, one side of the arc-shaped movable seat 6 is fixedly connected with the powerful spring 5, the other side of the arc-shaped movable seat 6 is fixedly provided with a pressure sensor 7, one end of the right arc-shaped plate 2 is fixedly provided with an arc-shaped telescopic pressing plate 8, one end of the arc-shaped telescopic pressing plate 8 penetrates through the opening end of the arc-shaped telescopic groove 4 and is contacted with the pressure sensor 7, the bottoms of the left arc-shaped plate 1 and the right arc-shaped plate 2 are both fixedly provided with a laser detection device 9, the laser detection device 9 comprises an installation seat 10 and a fixed seat 11, the front side and the rear side of the mounting seat 10 are respectively fixedly provided with a laser transmitter 12 and a laser receiver 13.
As a preferred embodiment of the present invention, the protection plate 3 is placed on the top of the connection portion between the left arc-shaped plate 1 and the right arc-shaped plate 2, a sliding seat 15 is fixedly installed at the bottom of the protection plate 3, sliding grooves 14 are respectively formed at positions corresponding to the sliding seats 15 on the top of the left arc-shaped plate 1 and the right arc-shaped plate 2, and the sliding seats 15 are located in the sliding grooves 14.
In a preferred embodiment of the present invention, the number of the strong springs 5 is 4.
As a preferred embodiment of the present invention, the protection plate 3, the left arc-shaped plate 1 and the right arc-shaped plate 2 are all provided with a plurality of fixing screw holes 16.
In a preferred embodiment of the present invention, the left arc-shaped plate 1 and the right arc-shaped plate 2 have the same shape and size.
In a preferred embodiment of the present invention, the center lines of the laser transmitter 12 and the laser receiver 13 are located on the same straight line.
As a preferred embodiment of the present invention, the arc-shaped retractable pressing plate 8 at one end of the right arc-shaped plate 2 can be retracted in the arc-shaped retractable groove 4 at one end of the left arc-shaped plate 1, so that the value of the pressure sensor 7 changes, whether the plates at the two sides of the tunnel gap move can be detected by analyzing the pressure change, so as to detect the safety of the tunnel, and the pressure sensor 7 is connected with the inner side wall of the arc-shaped retractable groove 4 through the strong spring 5, so that the pressure sensor 7 has a certain retractility, so as to prevent the pressure sensor 7 from being damaged, when in use, the protection plate 3 is installed at the gap through bolts, the left arc-shaped plate 1 and the right arc-shaped plate 2 are respectively installed at the two sides of the gap on the inner wall of the tunnel through bolts and attached to the bottom of the protection plate 3, a plurality of omnibearing comprehensive detectors for the tunnel are installed, so that the laser detection devices 9 of each device are aligned, make laser emitter 12's laser line can project the laser receiver 13 of next this device, with pressure sensor 7, laser emitter 12 and laser receiver 13 all are connected to intelligent processing system and power supply system, laser detection device 9 has laser emission function and laser receiving function, on the one hand, the laser that laser emitter 12 sent can form the laser marking in the tunnel, be favorable to the current safety in tunnel and experience sense, on the other hand, when laser emitter 12's laser line deviates from the laser receiver 13 of another detector, it is obvious to explain the plate motion of gap both sides, the security in tunnel has reduced to a certain extent.
As a preferred embodiment of the present invention, the protection plate 3 can protect the gap between the left arc-shaped plate 1 and the right arc-shaped plate 2, and prevent condensed water from dropping into the gap, thereby preventing the damage of components and prolonging the service life, and the protection plate 3 is connected with the left arc-shaped plate 1 and the right arc-shaped plate 2 by matching the sliding groove 14 and the sliding base 15, so that the movement of the left arc-shaped plate 1 and the right arc-shaped plate 2 is not affected.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An omnibearing comprehensive tunnel detector comprises a left arc-shaped plate (1), a right arc-shaped plate (2) and a protection plate (3), and is characterized in that an arc-shaped telescopic groove (4) is formed in one end of the left arc-shaped plate (1), a strong spring (5) is fixedly connected to the inner side wall, away from an opening end, of the arc-shaped telescopic groove (4), an arc-shaped movable seat (6) is movably mounted in the arc-shaped telescopic groove (4), one side of the arc-shaped movable seat (6) is fixedly connected with the strong spring (5), a pressure sensor (7) is fixedly mounted on the other side of the arc-shaped movable seat (6), an arc-shaped telescopic pressing plate (8) is fixedly mounted at one end of the right arc-shaped plate (2), one end of the arc-shaped telescopic pressing plate (8) penetrates through the opening end of the arc-shaped telescopic groove (4) and is in contact with the pressure sensor (7), and laser detection devices (9) are fixedly mounted at the bottoms of the left arc-shaped plate (1) and the right arc-shaped plate (2), laser detection device (9) are including mount pad (10) and fixing base (11), the front side and the rear side of mount pad (10) are fixed mounting respectively has laser emitter (12) and laser receiver (13), the central line of laser emitter (12) and laser receiver (13) is in same straight line, with left arc (1) and right arc (2) respectively through the gap both sides of bolt installation on the tunnel inner wall and laminating in the bottom of guard plate (3), install the all-round comprehensive detector in a plurality of this tunnel, make laser detection device (9) of every this device align, make laser emitter (12) the laser line can project laser receiver (13) of next this device.
2. The comprehensive detector of claim 1, wherein the comprehensive detector comprises: place the top at left side arc (1) and right arc (2) junction in guard plate (3), the bottom fixed mounting of guard plate (3) has slide (15), spout (14) have all been seted up with the position department that slide (15) correspond in the top of left side arc (1) and right arc (2), slide (15) are in spout (14).
3. The comprehensive detector of claim 1, characterized in that: the number of the strong springs (5) is 4.
4. The comprehensive detector of claim 1, characterized in that: a plurality of fixing screw holes (16) are formed in the protection plate (3), the left arc-shaped plate (1) and the right arc-shaped plate (2).
5. The comprehensive detector of claim 1, characterized in that: the left arc-shaped plate (1) and the right arc-shaped plate (2) are identical in shape and size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011073598.9A CN112268797B (en) | 2020-10-09 | 2020-10-09 | All-round comprehensive detector in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011073598.9A CN112268797B (en) | 2020-10-09 | 2020-10-09 | All-round comprehensive detector in tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112268797A CN112268797A (en) | 2021-01-26 |
| CN112268797B true CN112268797B (en) | 2022-07-19 |
Family
ID=74338541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011073598.9A Active CN112268797B (en) | 2020-10-09 | 2020-10-09 | All-round comprehensive detector in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112268797B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608466B (en) * | 2022-03-14 | 2023-08-01 | 成都航空职业技术学院 | Deformation detection device and method for large thin-wall part |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238907A (en) * | 1988-07-29 | 1990-02-08 | Komatsu Ltd | Tunnel crack detecting device |
| JPH06331353A (en) * | 1993-05-24 | 1994-12-02 | Taisei Corp | Method and device for measuring displacement of air section inside tunnel |
| JPH09318352A (en) * | 1996-05-29 | 1997-12-12 | Maeda Corp | Apparatus and method for measuring hollow displacement in tunnel |
| JPH11281353A (en) * | 1998-03-30 | 1999-10-15 | Nippon Shinko Kk | Method and apparatus for measuring displacement of inner shell of tunnel |
| CN102607425A (en) * | 2012-03-19 | 2012-07-25 | 武汉理工大学 | Steel rail or bridge displacement monitoring device for fiber Bragg grating transformation ring |
| JP2014002027A (en) * | 2012-06-18 | 2014-01-09 | Hazama Ando Corp | Method of measuring displacement of space within tunnel |
| WO2014178637A1 (en) * | 2013-05-03 | 2014-11-06 | Kwon Young-Eok | Method for measuring tunnel displacement using buried displacement meter |
| JP2015049765A (en) * | 2013-09-03 | 2015-03-16 | 公益財団法人鉄道総合技術研究所 | Method of correcting distortion of tunnel lining surface image |
| CN206709813U (en) * | 2017-04-13 | 2017-12-05 | 上海隧道工程质量检测有限公司 | A kind of movable tunnel cross section deformation detection means |
| CN206724713U (en) * | 2017-05-22 | 2017-12-08 | 山西南娄泉杰建材有限公司 | Anti-collapse support meanss when a kind of tunnel kiln is built |
| CN109373926A (en) * | 2018-12-30 | 2019-02-22 | 江龙 | The continuous monitoring alarm method of constructing tunnel surrouding rock deformation and monitoring system |
| CN208780165U (en) * | 2018-10-31 | 2019-04-23 | 长安大学 | A kind of tunnel slot real-time monitoring system |
| CN209117598U (en) * | 2018-11-15 | 2019-07-16 | 徐长峰 | A kind of laser tunnel slot automatic detecting instrument |
| CN210953757U (en) * | 2019-10-12 | 2020-07-07 | 铁四院(湖北)工程监理咨询有限公司 | Tunnel detection device |
| CN111521497A (en) * | 2020-05-12 | 2020-08-11 | 张仲 | Tunnel monitoring device and monitoring method |
| CN211375056U (en) * | 2019-12-12 | 2020-08-28 | 山东交通学院 | Tunnel vault quality nondestructive test device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3553374B2 (en) * | 1997-12-17 | 2004-08-11 | 三菱重工業株式会社 | Structural deformation measuring device |
| CN101458069B (en) * | 2008-12-30 | 2011-02-23 | 中铁二十四局集团有限公司 | Tunnel wall rock deformation monitoring method and monitoring system thereof |
| JP6373111B2 (en) * | 2014-07-25 | 2018-08-15 | 西日本高速道路エンジニアリング四国株式会社 | Tunnel lining surface inspection system and vehicle used for tunnel lining surface inspection system |
| JP7121520B2 (en) * | 2018-04-06 | 2022-08-18 | 清水建設株式会社 | Device and method for presenting deformed area |
| CN110657753B (en) * | 2019-09-02 | 2023-08-04 | 山东大学 | Sensing system and method for monitoring deformation field of linear engineering |
| CN110595375A (en) * | 2019-09-20 | 2019-12-20 | 中铁隧道局集团有限公司 | Method for continuously monitoring deformation of side wall in tunnel inverted arch excavation process |
| CN113310425A (en) * | 2021-05-20 | 2021-08-27 | 中国科学院武汉岩土力学研究所 | Method and equipment for monitoring overall deformation of shield tunnel |
-
2020
- 2020-10-09 CN CN202011073598.9A patent/CN112268797B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238907A (en) * | 1988-07-29 | 1990-02-08 | Komatsu Ltd | Tunnel crack detecting device |
| JPH06331353A (en) * | 1993-05-24 | 1994-12-02 | Taisei Corp | Method and device for measuring displacement of air section inside tunnel |
| JPH09318352A (en) * | 1996-05-29 | 1997-12-12 | Maeda Corp | Apparatus and method for measuring hollow displacement in tunnel |
| JPH11281353A (en) * | 1998-03-30 | 1999-10-15 | Nippon Shinko Kk | Method and apparatus for measuring displacement of inner shell of tunnel |
| CN102607425A (en) * | 2012-03-19 | 2012-07-25 | 武汉理工大学 | Steel rail or bridge displacement monitoring device for fiber Bragg grating transformation ring |
| JP2014002027A (en) * | 2012-06-18 | 2014-01-09 | Hazama Ando Corp | Method of measuring displacement of space within tunnel |
| WO2014178637A1 (en) * | 2013-05-03 | 2014-11-06 | Kwon Young-Eok | Method for measuring tunnel displacement using buried displacement meter |
| JP2015049765A (en) * | 2013-09-03 | 2015-03-16 | 公益財団法人鉄道総合技術研究所 | Method of correcting distortion of tunnel lining surface image |
| CN206709813U (en) * | 2017-04-13 | 2017-12-05 | 上海隧道工程质量检测有限公司 | A kind of movable tunnel cross section deformation detection means |
| CN206724713U (en) * | 2017-05-22 | 2017-12-08 | 山西南娄泉杰建材有限公司 | Anti-collapse support meanss when a kind of tunnel kiln is built |
| CN208780165U (en) * | 2018-10-31 | 2019-04-23 | 长安大学 | A kind of tunnel slot real-time monitoring system |
| CN209117598U (en) * | 2018-11-15 | 2019-07-16 | 徐长峰 | A kind of laser tunnel slot automatic detecting instrument |
| CN109373926A (en) * | 2018-12-30 | 2019-02-22 | 江龙 | The continuous monitoring alarm method of constructing tunnel surrouding rock deformation and monitoring system |
| CN210953757U (en) * | 2019-10-12 | 2020-07-07 | 铁四院(湖北)工程监理咨询有限公司 | Tunnel detection device |
| CN211375056U (en) * | 2019-12-12 | 2020-08-28 | 山东交通学院 | Tunnel vault quality nondestructive test device |
| CN111521497A (en) * | 2020-05-12 | 2020-08-11 | 张仲 | Tunnel monitoring device and monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112268797A (en) | 2021-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112268797B (en) | All-round comprehensive detector in tunnel | |
| CN103212970B (en) | Automatic feeding and pressing device for end caps | |
| CN203165117U (en) | Anti-theft door magnetic detector | |
| PL362166A1 (en) | Traffic passive signalling device equipped with at least two optical systems | |
| CN106447981B (en) | Emergency alarm equipment when a kind of transformer powers off | |
| CN103633602B (en) | Power overhead network is passed by one's way tubular type alarming device and mounting tool thereof | |
| CN103490187A (en) | Temporary grounding rod with clamping state monitoring function | |
| CN109523801B (en) | TDMA wireless geomagnetic vehicle detector | |
| CN205262764U (en) | Safety belt assembly detection mechanism | |
| CN108171937A (en) | A kind of natural gas leakage remote warning device | |
| KR100992146B1 (en) | Distributing board of undergraund distribution line | |
| CN203165118U (en) | Cipher type door magnetic detector | |
| CN103116956A (en) | Door magnetic detector | |
| CN207039109U (en) | Security protection crane span structure pipeline system | |
| CN216673463U (en) | Multimedia cabinet capable of adjusting internal space | |
| CN220207758U (en) | Maintenance fault investigation instrument for electromechanical equipment | |
| CN214577192U (en) | Mining communication detection device | |
| CN219608270U (en) | Temperature acquisition device for power distribution cabinet | |
| CN110087415A (en) | A kind of drawer type electrical cabinet mounting structure | |
| CN215114898U (en) | Mounting structure of wireless temperature measurement sensor | |
| CN108288355A (en) | monitor and alarm system for landslide | |
| CN219265671U (en) | Detection mechanism capable of realizing rapid switching | |
| CN212809587U (en) | Early warning device for monitoring high-speed railway side slope | |
| CN214175903U (en) | Anti-misoperation switch device for mechanical equipment | |
| CN202495926U (en) | Proximity switch for measuring multiple distances |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |