CN110093949A - A kind of assembled apparatus for examination and repair - Google Patents
A kind of assembled apparatus for examination and repair Download PDFInfo
- Publication number
- CN110093949A CN110093949A CN201910365869.9A CN201910365869A CN110093949A CN 110093949 A CN110093949 A CN 110093949A CN 201910365869 A CN201910365869 A CN 201910365869A CN 110093949 A CN110093949 A CN 110093949A
- Authority
- CN
- China
- Prior art keywords
- holding rod
- fixedly connected
- sealing plate
- access hole
- examination
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1427—Locking devices
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention discloses a kind of assembled apparatus for examination and repair, including access hole framework, in the access hole framework at the top and bottom of it before be fixedly connected with horizontal stripe.The present invention is when needing to open access hole framework and overhauling, the second magnet on mobile holding rod is allowed to be inserted into the strip groove on fixed holding rod, second magnet generates attraction to fixed holding rod, to allow mobile holding rod and fixed holding rod closely to fit together, mobile holding rod pulls locking inserted block by drawstring during this, locking inserted block is allowed to stretch out from latch recess, it retracts in locking through-hole, the locking of position between depressurization plate and access hole framework, do not unclamp the power for holding fixed holding rod and mobile holding rod, sealing plate is pushed to move right along horizontal stripe and block court by the fixed holding rod of promotion and mobile holding rod, to which access hole framework be opened, achieve the effect that easy to operate open and close.
Description
Technical field
The present invention relates to service technique field, specially a kind of assembled apparatus for examination and repair.
Background technique
In building field, the access hole for people's disengaging can be arranged in people, periodically all kinds of indexs of the building are detected, thus really
The concrete condition of the fixed building, this mode are both provided with access hole on the objects such as other field, such as pipeline, vehicle, come
It is easy to repair.But present access hole on the market, it is mostly then to pass through screw for cover board through cover plate lid on access hole
It is closed with the mode that access hole links together, opening and closing are all relatively complicated every time, and it is inconvenient, changed
Into.
Summary of the invention
The purpose of the present invention is to provide a kind of assembled apparatus for examination and repair, have the advantages of Convenient switch, solve existing
Access hole in the market is mostly then to be connected to cover board and access hole by screw through cover plate lid on access hole
Mode together is closed, and opens and closes all relatively complicated, inconvenient problem every time.
To achieve the above object, the invention provides the following technical scheme: a kind of assembled apparatus for examination and repair, including access hole frame
Body, in the access hole framework at the top and bottom of it before be fixedly connected with horizontal stripe.
It is opened up before the access hole framework there are four latch recess, is uniformly fixedly connected with gear before the horizontal stripe
Block, slidably connects sealing plate between two horizontal stripes, behind the block with contacted before sealing plate, the access hole frame
It being fixedly connected before body there are two fixed holding rod, the side of the fixed holding rod is fixedly connected there are two inserted link, and two
The surface activity of inserted link is plugged with mobile holding rod, and the opposite face of the inserted link and mobile holding rod is fixedly connected with spring, institute
The both ends for stating mobile holding rod are fixedly connected with drawstring, and one end far from mobile holding rod is fixedly connected with locking on the drawstring
Inserted block opens up before the sealing plate there are four through-hole is locked, and a part of the locking inserted block is passed through by locking through-hole
It is inserted into latch recess after sealing plate, the inner wall of the access hole framework is fixedly connected with the first magnet by latch recess.
Preferably, turning groove is offered before the sealing plate, the inner wall of the sealing plate is turned by turning groove
Dynamic to be connected with rotary cylinder, the surface of the rotary cylinder is contacted with the surface of drawstring.
Preferably, guide pad, the guide pad are fixedly connected with close to one end of access hole framework on the locking inserted block
Shape be hemispherical.
Preferably, the side of the mobile holding rod is fixedly connected with sponge strip.
Preferably, the other side of the mobile holding rod is fixedly connected with the second magnet, the side of the fixed holding rod
Strip groove is offered, the surface of second magnet is contacted by strip groove with the inner wall of fixed holding rod.
Preferably, the inner wall of the sealing plate is fixedly connected by locking through-hole there are four rectangular strip.
Preferably, one end far from locking through-hole on four rectangular strips is fixedly connected with the same annulus, on the drawstring
One end far from latch recess is fixedly connected after passing through annulus with mobile holding rod.
Preferably, locating piece, the side of the locating piece and sealing plate are fixedly connected with before the access hole framework
Contact.
Preferably, positioning rope is fixedly connected between the locating piece and sealing plate, the length of the positioning rope is less than inspection
Repair the width of mouthful framework.
Preferably, observation through-hole is offered before the sealing plate, the inner wall of the sealing plate is solid by observation through-hole
Surely it is connected with transparent panel.
Compared with prior art, beneficial effects of the present invention are as follows:
The present invention is by being arranged fixed holding rod and mobile holding rod, when needing to open access hole framework and being overhauled,
Mobile holding rod and fixed holding rod are held, allows mobile holding rod along inserted link on fixed holding rod, mobile holding rod
Second magnet is inserted into the strip groove on fixed holding rod, and the second magnet generates attraction to fixed holding rod, to allow shifting
Dynamic holding rod and fixed holding rod closely fit together, and mobile holding rod pulls locking to insert by drawstring during this
Block allows locking inserted block to stretch out from latch recess, retracts in locking through-hole, position between depressurization plate and access hole framework
The power for holding fixed holding rod and mobile holding rod is not unclamped in locking, by pushing fixed holding rod and mobile holding rod to push
Sealing plate is moved right along horizontal stripe and block court, to access hole framework be opened, when needing to close access hole framework, towards a left side
Sealing plate is pushed, when sealing plate is contacted with locating piece, stops pushing sealing plate, since the first magnet is to locking inserted block
Attraction and spring are greater than the second magnet to the attraction of fixed holding rod to the elastic force of mobile holding rod, hold to allow and fix
Bar and mobile holding rod separate automatically, in locking inserted block insertion latch recess, lock position of the sealing plate in access hole framework,
Sealing is completed, has achieved the effect that easy to operate open and close.
Detailed description of the invention
Fig. 1 is front view of the invention；
Fig. 2 is the front view that the present invention removes sealing plate；
Fig. 3 is the schematic cross-sectional view of side view of the present invention；
Fig. 4 is structure enlargement diagram at A in Fig. 3；
Fig. 5 is structure enlargement diagram at B in Fig. 1；
Fig. 6 is the side view of the fixed holding rod of the present invention.
In figure: the fixed holding rod of 1- access hole framework, 2- horizontal stripe, 3- latch recess, 4- block, 5- sealing plate, 6-, 7- are inserted
The mobile holding rod of bar, 8-, 9- spring, 10- drawstring, 11- locking inserted block, 12- locking through-hole, the first magnet of 13-, 14- rotation are recessed
Slot, 15- rotary cylinder, 16- guide pad, 17- sponge strip, the second magnet of 18-, 19- strip groove, 20- rectangular strip, 21- annulus,
22- locating piece, 23- positioning rope, 24- observe through-hole, 25- transparent panel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 to Fig.3, the present invention provides a kind of technical solution: a kind of assembled apparatus for examination and repair, including access hole frame
Body 1, access hole framework 1 are mounted in the device for needing to overhaul or structure, and positioning is fixedly connected with before access hole framework 1
The side of block 22, locating piece 22 is contacted with sealing plate 5, and the setting of locating piece 22 continues to be moved to the left for limiting sealing plate 5, when
When sealing plate 5 and locating piece 22 contact, sealing plate 5 completely seals access hole framework 1, locating piece 22 and sealing
Positioning rope 23 is fixedly connected between plate 5, the length of positioning rope 23 is less than the width of access hole framework 1, the setting of positioning rope 23
The distance to move right for limiting sealing plate 5 prevents sealing plate 5 to be detached from access hole framework 1, close to it in access hole framework 1
Horizontal stripe 2 is fixedly connected with before top and bottom, horizontal stripe 2 is by 5 support of sealing plate before access hole framework 1.
Fig. 1 to Fig. 6 is please referred to, is opened up before access hole framework 1 there are four latch recess 3, latch recess 3 is set as
It locks grafting of the inserted block 11 in access hole framework 1 and position is provided, be uniformly fixedly connected with block 4, block 4 before horizontal stripe 2
Setting for sealing plate 5 to be limited between two horizontal stripes 2, prevent sealing plate 5 from preceding emaciated face from sliding between two horizontal stripes 2
Dynamic to be connected with sealing plate 5, push-and-pull sealing plate 5 in left and right is realized the sealing and unlatching to access hole framework 1, is opened before sealing plate 5
Equipped with observation through-hole 24, the inner wall of sealing plate 5 is fixedly connected with transparent panel 25 by observing through-hole 24, and transparent panel 25 passes through observation
The case where through-hole 24 is fixed on sealing plate 5, is observed behind access hole framework 1 through transparent panel 25, behind block 4 with sealing
It is contacted before plate 5, is fixedly connected before access hole framework 1 there are two fixed holding rod 6, fixes the setting side of holding rod 6
Just user pushes sealing plate 5 to move left and right, the side of fixed holding rod 6 is fixedly connected with two by holding fixed holding rod 6
A inserted link 7, inserted link 7 are that mobile holding rod 8 provides the position of activity grafting, and the surface activity of two inserted links 7 is plugged with movement and holds
Bar 8 is held, mobile holding rod 8 and fixed holding rod 6 are held, allows mobile holding rod 8 along inserted link 7 close to fixed holding rod 6, it is mobile
The both ends of holding rod 8 pull drawstring 10, and the side of mobile holding rod 8 is fixedly connected with sponge strip 17, improves the comfort level of gripping,
The other side of mobile holding rod 8 is fixedly connected with the second magnet 18, and the side of fixed holding rod 6 offers strip groove 19, the
The surface of two magnet 18 is contacted by strip groove 19 with the inner wall of fixed holding rod 6, when mobile holding rod 8 and fixed holding rod
6 close to when, the second magnet 18 is inserted into strip groove 19, and the attraction of the second 18 pairs of magnet fixed holding rod 6 generation is than spring 9
It is big to the pulling force of mobile holding rod 8, the suction of the pulling force of holding rod 8 more mobile than 9 pairs of spring and 13 pairs of the first magnet locking inserted blocks 11
Gravitation, which is added together, wants small, and the opposite face of inserted link 7 and mobile holding rod 8 is fixedly connected with spring 9, and spring 9 is generated by deformation
Elastic force provides power for the reset of mobile holding rod 8, and the both ends of mobile holding rod 8 are fixedly connected with drawstring 10, mobile holding rod
8 pull locking inserted block 11 by drawstring 10, offer turning groove 14 before sealing plate 5, the inner wall of sealing plate 5 passes through rotation
Groove 14 is rotatably connected to rotary cylinder 15, and the surface of rotary cylinder 15 is contacted with the surface of drawstring 10, and rotary cylinder 15 is recessed by rotating
Slot 14 is rotatably connected on sealing plate 5, is contacted with drawstring 10, thus when mobile holding rod 8 being allowed to pull drawstring 10, drawstring 10 with it is close
The surface of sealing plate 5 is contacted by rotary cylinder 15, to lower the friction between drawstring 10 and sealing plate 5, far from shifting on drawstring 10
One end of dynamic holding rod 8 is fixedly connected with locking inserted block 11, and the locking insertion of inserted block 11 locks in through-hole 12 and latch recess 3, lock
Determine position of the sealing plate 5 in access hole framework 1, the one end for locking close access hole framework 1 on inserted block 11, which is fixedly connected with, leads
To block 16, the shape of guide pad 16 is hemispherical, and the setting of guide pad 16 allows for playing the role of a guiding and locks inserted block
It is more smooth in 11 insertion latch recess 3, it is opened up before sealing plate 5 there are four through-hole 12 is locked, locking through-hole 12 is set as
It locks inserted block 11 and passes through sealing plate 5 and track is provided, the inner wall of sealing plate 5 is fixedly connected with that there are four rectangular strips by locking through-hole 12
20, the setting of rectangular strip 20 is for preventing locking inserted block 11 to be detached from locking through-hole 12, separate locking through-hole on four rectangular strips 20
12 one end is fixedly connected with the same annulus 21, one end on drawstring 10 far from latch recess 3 pass through after annulus 21 with movement
Holding rod 8 is fixedly connected, and is played the role of a guiding to drawstring 10, is allowed drawstring 10 to transfer more smooth, locking inserted block 11
A part is inserted into latch recess 3 after passing through sealing plate 5 by locking through-hole 12, and the inner wall of access hole framework 1 is recessed by locking
Slot 3 is fixedly connected with the first magnet 13, and the first 13 pairs of magnet locking inserted block 11 generates an attraction, locks inserted block 11 to allow
It is inserted into latch recess 3.
Working principle: this kind of assembled apparatus for examination and repair is held in use, when needing to open access hole framework 1 and being overhauled
Mobile holding rod 8 and fixed holding rod 6 are held, allows mobile holding rod 8 along inserted link 7 close to fixed holding rod 6, mobile holding rod 8
On the second magnet 18 be inserted into the strip groove 19 on fixed holding rod 6, the fixed holding rod 6 of the second 18 pairs of magnet, which generates, to be attracted
Power, so that mobile holding rod 8 and fixed holding rod 6 be allowed closely to fit together, mobile holding rod 8 passes through drawing during this
Rope 10 pulls locking inserted block 11, and locking inserted block 11 is allowed to stretch out from latch recess 3, retracts in locking through-hole 12, depressurization plate 5
The power for holding fixed holding rod 6 and mobile holding rod 8 is not unclamped in the locking of position between access hole framework 1, solid by pushing
Determine holding rod 6 and mobile holding rod 8 pushes sealing plate 5 along horizontal stripe 2 and block 4 towards moving right, so that access hole framework 1 be beaten
It opens, when needing to close access hole framework 1, stops when sealing plate 5 is contacted with locating piece 22 towards left promotion sealing plate 5
Sealing plate 5 is pushed, the elastic force of the attraction and 9 pairs of spring mobile holding rods 8 that lock inserted block 11 due to 13 pairs of the first magnet is greater than
The attraction of the fixed holding rod 6 of second 18 pairs of magnet, so that fixed holding rod 6 and mobile holding rod 8 be allowed to separate automatically, locking is inserted
Block 11 is inserted into latch recess 3, is locked position of the sealing plate 5 in access hole framework 1, is completed sealing.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of assembled apparatus for examination and repair, including access hole framework (1), it is characterised in that: close on the access hole framework (1)
Horizontal stripe (2) are fixedly connected with before at the top and bottom of it；
It is uniformly fixed before the horizontal stripe (2) to connect there are four being opened up before the access hole framework (1) latch recess (3)
Be connected to block (4), slidably connected sealing plate (5) between two horizontal stripes (2), behind the block (4) with sealing plate (5)
Front contact, is fixedly connected with that there are two fixed holding rod (6), the fixed holding rods (6) before the access hole framework (1)
Side be fixedly connected there are two inserted link (7), the surface activity of two inserted links (7) is plugged with mobile holding rod (8), the inserted link
(7) it is fixedly connected with spring (9) with the opposite face of mobile holding rod (8), the both ends of the mobile holding rod (8) are fixedly connected with
Drawstring (10), one end far from mobile holding rod (8) on the drawstring (10) are fixedly connected with locking inserted block (11), the sealing
It is opened up before plate (5) there are four through-hole (12) are locked, a part of locking inserted block (11) is worn by locking through-hole (12)
It crosses sealing plate (5) to be inserted into latch recess (3) afterwards, the inner wall of the access hole framework (1) is fixedly connected by latch recess (3)
There are the first magnet (13).
2. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: opened before the sealing plate (5)
Equipped with turning groove (14), the inner wall of the sealing plate (5) is rotatably connected to rotary cylinder (15) by turning groove (14), described
The surface of rotary cylinder (15) is contacted with the surface of drawstring (10).
3. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: close on the locking inserted block (11)
One end of access hole framework (1) is fixedly connected with guide pad (16), and the shape of the guide pad (16) is hemispherical.
4. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: the one of the mobile holding rod (8)
Side is fixedly connected with sponge strip (17).
5. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: the mobile holding rod (8) it is another
Side is fixedly connected with the second magnet (18), and the side of the fixed holding rod (6) offers strip groove (19), and described second
The surface of magnet (18) is contacted by strip groove (19) with the inner wall of fixed holding rod (6).
6. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: the inner wall of the sealing plate (5) is logical
Locking through-hole (12) is crossed to be fixedly connected there are four rectangular strip (20).
7. a kind of assembled apparatus for examination and repair according to claim 6, it is characterised in that: far from lock on four rectangular strips (20)
The one end for determining through-hole (12) is fixedly connected with the same annulus (21), far from the one end of latch recess (3) on the drawstring (10)
It is fixedly connected afterwards with mobile holding rod (8) across annulus (21).
8. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: before the access hole framework (1)
Face is fixedly connected with locating piece (22), and the side of the locating piece (22) is contacted with sealing plate (5).
9. a kind of assembled apparatus for examination and repair according to claim 8, it is characterised in that: the locating piece (22) and sealing plate
(5) it is fixedly connected between positioning rope (23), the length of the positioning rope (23) is less than the width of access hole framework (1).
10. a kind of assembled apparatus for examination and repair according to claim 1, it is characterised in that: opened before the sealing plate (5)
Equipped with observation through-hole (24), the inner wall of the sealing plate (5) is fixedly connected with transparent panel (25) by observing through-hole (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910365869.9A CN110093949A (en) | 2019-04-30 | 2019-04-30 | A kind of assembled apparatus for examination and repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910365869.9A CN110093949A (en) | 2019-04-30 | 2019-04-30 | A kind of assembled apparatus for examination and repair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110093949A true CN110093949A (en) | 2019-08-06 |
Family
ID=67446714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910365869.9A Pending CN110093949A (en) | 2019-04-30 | 2019-04-30 | A kind of assembled apparatus for examination and repair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110093949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482575A (en) * | 2021-05-18 | 2021-10-08 | 杨彪 | Well head safety device for mine exploration |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570972A (en) * | 2009-05-07 | 2009-11-04 | 张宝宇 | Safe theft-proof well cover |
| CN204738626U (en) * | 2015-05-14 | 2015-11-04 | 上海电机学院 | Manhole cover antitheft device |
| CN205400319U (en) * | 2016-02-26 | 2016-07-27 | 余赛君 | Draw rope lock |
| CN106120864A (en) * | 2016-06-28 | 2016-11-16 | 冯婷婷 | A kind of method of manufacture and use thereof of the anti-theft device of inspection well cover |
| CN106638703A (en) * | 2017-01-10 | 2017-05-10 | 国家电网公司 | Anti-theft, waterproof, dustproof and noise-proof well lid |
| CN206409046U (en) * | 2017-01-18 | 2017-08-15 | 中山市凯英五金制品有限公司 | A kind of handle door lock structure |
| CN210263140U (en) * | 2019-04-30 | 2020-04-07 | 苏州金螳螂建筑装饰股份有限公司 | Assembled overhauls device |
-
2019
- 2019-04-30 CN CN201910365869.9A patent/CN110093949A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570972A (en) * | 2009-05-07 | 2009-11-04 | 张宝宇 | Safe theft-proof well cover |
| CN204738626U (en) * | 2015-05-14 | 2015-11-04 | 上海电机学院 | Manhole cover antitheft device |
| CN205400319U (en) * | 2016-02-26 | 2016-07-27 | 余赛君 | Draw rope lock |
| CN106120864A (en) * | 2016-06-28 | 2016-11-16 | 冯婷婷 | A kind of method of manufacture and use thereof of the anti-theft device of inspection well cover |
| CN106638703A (en) * | 2017-01-10 | 2017-05-10 | 国家电网公司 | Anti-theft, waterproof, dustproof and noise-proof well lid |
| CN206409046U (en) * | 2017-01-18 | 2017-08-15 | 中山市凯英五金制品有限公司 | A kind of handle door lock structure |
| CN210263140U (en) * | 2019-04-30 | 2020-04-07 | 苏州金螳螂建筑装饰股份有限公司 | Assembled overhauls device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482575A (en) * | 2021-05-18 | 2021-10-08 | 杨彪 | Well head safety device for mine exploration |
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