CN109577900A - Groundwater monitoring well protection structure - Google Patents
Groundwater monitoring well protection structure Download PDFInfo
- Publication number
- CN109577900A CN109577900A CN201710891908.XA CN201710891908A CN109577900A CN 109577900 A CN109577900 A CN 109577900A CN 201710891908 A CN201710891908 A CN 201710891908A CN 109577900 A CN109577900 A CN 109577900A
- Authority
- CN
- China
- Prior art keywords
- outer cover
- fixture block
- vertical bar
- cover
- protection structure
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Abstract
The invention discloses a kind of groundwater monitoring well protection structures, its key points of the technical solution are that including well body, outer cover is provided at the well head of well body, top cover is provided at the top of outer cover, both fixed fixing piece is provided between top cover and outer cover, the sliding slot for outer cover vertical sliding is offered in well body, the vertical bar slid vertically and vertical bar one end protrusion outer cover top surface are provided on outer cover, the chamber for vertical bar sliding is provided in outer cover, fixture block is slidably connected on chamber inner wall, it is provided on sliding slot inner wall and is clamped with fixture block and outer cover is kept to be in the card slot outside sliding slot, the mobile linkage mechanism that is caught in card slot of link fixture block is provided with when it is moved down on vertical bar, its return unit for being detached from card slot of driving is provided on fixture block, and after opening top cover, vertical bar can set back under return unit effect, fixture block is not clamped with card slot at this time, and then it can incite somebody to action Outer cover downslide is received into chamber, and outer cover will not block the relevant device at well head at this time, convenient for the operation or maintenance to equipment.
Description
Technical field
The present invention relates to groundwater monitoring well fields, in particular to groundwater monitoring well protection structure.
Background technique
In order to timely obtain the related data of underground water, a well usually is beaten in prediction area, then at well head
Relevant device is set, and relevant sensor is arranged in underground, the related data measured is by people or by the side of wireless telecommunications
Formula transfers out, in order to protect to relevant device, it will usually guard box be arranged at well head.
Such as the Chinese patent that notification number is CN201155312Y discloses a kind of wellhead protecting housing for groundwater monitoring, including
One cabinet is provided with case lid at cabinet upper opening, and anti-shielding construction is equipped on cabinet or case lid；Cabinet and case lid are in side
It is hinged by hinge, the box outer surface in side corresponding with hinge, which is equipped with, is inverted barrel-shaped lock, on barrel-shaped lock
Through-hole is equipped at portion center, the central axes of the through-hole are overlapped with the central axes of barrel-shaped lock；The case lid lower surface with
The corresponding position of barrel-shaped lock upper through-hole is vertically provided with screw rod, further includes one and mutually fits with barrel-shaped lock inner surface
The cylindrical tapered end matched is adapted screw hole with screw rod to having in tapered end upper surface middle part, is equipped with lockhole in tapered end lower surface；
It further include a tapered end key compatible with lockhole.After adopting the above structure, overall structure is simple, easy to use, anti-theft
It can be strong.
It, can be by the resistance of cabinet when measuring relevant device is operated or overhauled but due to the presence of cabinet
Hinder, cause inconvenient, influences to detect.
Summary of the invention
The purpose of the present invention is to provide a kind of groundwater monitoring well protection structures, have convenient for measurement relevant device
The advantages of being operated or being overhauled.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of groundwater monitoring well protection structure, including well body, are provided with outer cover at the well head of the well body, at the top of the outer cover
It is provided with top cover, both fixed fixing piece is provided between the top cover and outer cover, is offered in the well body perpendicular for outer cover
The sliding slot directly slided, is provided with the vertical bar slid vertically and vertical bar one end protrusion outer cover top surface on the outer cover, in the outer cover
It is provided with the chamber for vertical bar sliding, fixture block is slidably connected on the chamber inner wall, is provided with and blocks on the sliding slot inner wall
Block is clamped and outer cover is kept to be in the card slot outside sliding slot, and the fixture block movement that links is provided with when it is moved down on the vertical bar and is caught in
The linkage mechanism of card slot is provided with the return unit that driving fixture block is detached from card slot in the chamber.
It is arranged in this way, when not being monitored to underground water, top cover is covered on outer cover, and top cover pushes vertical bar in parallel
Dynamic fixture block is caught in card slot, and it is not in the situation for declining and being accommodated in sliding slot that outer cover, which can be limited, at this time, and outer cover is to well
Relevant device at mouthful can play a good protective effect, and after opening top cover, vertical bar can restore under return unit effect
In situ, fixture block is no longer clamped with card slot at this time, and then outer cover can be glided and be received into sliding slot, and outer cover will not block well at this time
Relevant device at mouthful, convenient for the operation or maintenance to equipment.
The present invention is further arranged: the linkage mechanism includes the lozenges that vertical bar bottom end is arranged in and abuts with fixture block,
The return unit includes the first spring, and first spring one end is fixed with chamber inner wall, and the other end is fixed with fixture block.
By the setting of lozenges, when vertical bar moves down, meeting applied force is on lozenges, and then fixture block is driven to move horizontally
And it is caught in the limit realized in card slot to outer cover, and after cover board opening, its effect in the first spring when vertical bar does not have stress
Lower fixture block deviates from card slot and vertical bar is driven to set back, and outer cover can glide and be received into sliding slot at this time, and structure is simple and realizes
The linkage of vertical bar and fixture block.
The present invention is further arranged: the linkage mechanism includes connecting rod, and described connecting rod one end and fixture block are hinged, the other end with
Vertical bar is hinged, and the hinge joint of the connecting rod and vertical bar is higher than the hinge joint with fixture block, and the return unit includes second spring, described
The both ends of second spring are fixed with vertical bar and chamber bottom respectively.
It is applied a force upon on fixture block during vertical bar moves down by connecting rod in this way, so that fixture block be driven to move horizontally card
Enter in card slot, and after cover board opening, when vertical bar does not have stress, it sets back under the action of second spring, and borrows simultaneously
It helps connecting rod that fixture block is pulled to remove card slot and is detached from clamping, outer cover can glide and be received into sliding slot at this time, and structure is simple and realizes perpendicular
The linkage of bar and fixture block.
The present invention is further arranged: the outer cover sidewall opens up fluted, and support bar, the branch are hinged in the groove
Stay is routed up when abutting with well head roof, and the fixture block and card slot are in corresponding position.
It, can after above mentioning outer cover when needing top cover after completing to the monitoring of underground water by the setting of support bar
Moving down for outer cover is limited to rout up support bar from groove and be supported by it, fixture block is in corresponding with card slot at this time
Position is operated during top cover with regard to mentioning outer cover always without hand in this way, to be more convenient to operate, and is operated
It is more easily laborsaving.
The present invention is further arranged: there are two the fixture block is symmetrical arranged, being provided on the fixture block and cooperates with lozenges
Inclined-plane.
Fixture block symmetrically arranged first makes the stability of clamping more secure, in addition by the setting on inclined-plane, so that
Fixture block can be contacted preferably with vertical bar, and vertical bar end can preferably enter between two fixture blocks and push the two horizontal
It is mobile.
The present invention is further arranged: vertical conducting bar is provided on the outer cover, the sliding slot inner wall is provided with and conducting bar
The guide groove of cooperation.
It can be realized the effect of guiding by the cooperation of conducting bar and guide groove, and the work circumferentially limited can be played to outer cover
With, and then there is no rotations to cause fixture block and card slot to the situation appearance on not during outer cover slides up and down.
The present invention is further arranged: the top of the outer cover is provided with bulge loop, and the outer diameter of the bulge loop is greater than the outer of well body
Diameter.
Since the outer diameter of bulge loop is greater than well body, grasped so that people when needing above to mention outer cover, can hold bulge loop
Make, easily facilitates the operation that people lift outer cover.
The present invention is further arranged: the top cover side and outer cover are hinged, and the fixing piece includes being arranged on top cover
Limit plate offers limiting slot on the limit plate, the recess portion fallen into for limit plate is provided on the bulge loop, the bulge loop
Bottom wall is equipped with the operating shaft being rotatablely connected with it, and described operating shaft one end is located in recess portion and is fixed with and limiting slot clamping
Positive stop strip.
Setting recess portion first is fallen into for limit plate, the pressure for keeping the bottom surface of top cover smooth during top cover in this way
In outer cover top surface, and at this time, limit plate is located in recess portion, then by rotating operating shaft positive stop strip is caught in limiting slot, makes
The fixation to top cover, so fixed mode good concealment are obtained, other people are not easy to find, and then can be very good the inspection inside protection
Relevant device is surveyed, stolen situation is reduced.
The present invention is further arranged: one end of the operating shaft is flushed with bulge loop bottom wall and end offers regular hexagon
Handle hole.
It, can be by hexagonal when can preferably keep the planarization of bulge loop bottom wall in this way, and need to rotate operating shaft
Spanner is operated, and without in the case where die nut other people be difficult to rotate operating shaft, thus more protection and safety,
Reduce the case where top cover is accidentally opened.
The present invention is further arranged: the outer diameter of the top cover is greater than bulge loop outer diameter, and the edge of the top cover is extended with downward
Block ring.
Setting by blocking ring can be played the role of blocking, and rainwater can be effectively reduced when rainy day and is passed through
The junction gap of top cover and outer cover enters the internal measurement relevant device caused inside influence, can play good waterproof
Effect.
In conclusion the invention has the following advantages: dynamic change can be grasped in time by detecting to underground water
Situation carries out digital preservation to underground water, and by the way that the outer cover slid vertically is arranged in well head, after opening top cover, vertical bar can be extensive
It restores position and at this time fixture block and card slot is detached from, and then cover on to slide into sliding slot under self gravity outside and be stored, thus
Operation or maintenance convenient for people to detection relevant device, and outer cover can above be mentioned to top cover again after completing detection, it pushes up
Lid driving vertical bar moves down linkage fixture block and is caught in card slot, and what outer cover can be stable at this time is in the shape for blocking internal detection relevant device
State plays the role of protection, and the locking of top plate is caught in the limiting slot on limit plate by positive stop strip and is fixed, and opens
Position be located at the bottom wall of bulge loop, not only good concealment, and can not opening in the case where no die nut plays good
Anti-theft effect.
Detailed description of the invention
Fig. 1 is the overall structure figure of embodiment 1；
Fig. 2 is the cross-sectional view of well head and outer cover in embodiment 1；
Fig. 3 is the enlarged drawing in Fig. 2 at A；
Fig. 4 is the structure chart of positive stop strip in embodiment 1；
Fig. 5 is the cross-sectional view of well head and outer cover in embodiment 2；
Fig. 6 is the enlarged drawing in Fig. 5 at B.
Appended drawing reference: 1, well body；2, outer cover；3, top cover；4, support plate；41, it perforates；5, sliding slot；6, chamber；7, vertical bar；
8, fixture block；9, card slot；10, lozenges；11, inclined-plane；12, the first spring；13, conducting bar；14, guide groove；15, groove；16, it supports
Item；17, bulge loop；18, limit plate；19, limiting slot；20, recess portion；21, operating shaft；22, positive stop strip；23, handle hole；24, it blocks
Ring；25, connecting rod；26, second spring.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Embodiment 1: a kind of groundwater monitoring well protection structure, as shown in Figure 1-Figure 3, including well body 1 and setting are in well
Outer cover 2 at mouthful, which is higher by well head surface, while being hinged with top cover 3 in the side of outer cover 2, and branch is provided at well head
Fagging 4, and multiple perforation 41 are offered in support plate 4, support plate 4 is placed in so as to be used to detect relevant device
And be located in outer cover 2, the purpose protected to it is played, while the sliding slot slid vertically for outer cover 2 is offered in well body 1
5, and slid vertically in outer cover 2 and be connected with vertical bar 7, the chamber 6 slided for vertical bar 7 is provided on outer cover 2, in the chamber 6
Level slidably connects the fixture block 8 that can be pierced by 2 side wall of outer cover, and offers and 8 corresponding matching of fixture block on 5 inner wall of sliding slot
2 top surface of outer cover is protruded on the top of card slot 9, vertical bar 7, and the fixture block 8 that links is provided with when it is moved down on vertical bar 7 and is caught in card slot 9
Linkage mechanism, the linkage mechanism include the lozenges 10 that 7 bottom end of vertical bar is arranged in, while being provided on fixture block 8 and lozenges
10 fitting inclined-planes 11, and fixture block 8 be symmetrical arranged there are two, driven during vertical bar 7 moves down by lozenges 10
Fixture block 8 is moved horizontally and is caught in card slot 9；The return unit that driving fixture block 8 is detached from card slot 9 is provided in chamber 6 simultaneously, this is multiple
Position part includes the first spring 12, and 12 one end of the first spring is fixed on fixture block 8, and the other end is fixed on 6 inner wall of chamber, thus
In the case where opening top cover 3, the restoring force of the first spring 12 can drive fixture block 8 to be detached from card slot 9 and then vertical bar 7 is driven to restore former
Position；Therefore when usually needing to be detected with relevant device, fixture block 8 is no longer clamped with card slot 9 after opening top cover 3, therefore outer cover 2
It can glide and be received into sliding slot 5, such outer cover 2 will not play blocking, easily facilitate subsequent operation or dimension to relevant device
It repairs, and fixture block 8 and card slot 9 can be kept to be clamped in top cover 3 after completing detection, outer cover 2 is protected inside it
Relevant device and will not glide in sliding slot 5.
It is provided with the conducting bar 13 being vertically arranged on the surface of outer cover 2, and is provided in 5 inner wall of sliding slot and matches with conducting bar 13
The guide groove 14 of conjunction so that outer cover 2 can only be 5 vertically movable along the chute, and can not circumferentially rotate to play the role of guiding, this
Sample is able to maintain fixture block 8 and card slot 9 is at corresponding position, is convenient for subsequent clamping；It is opened up on the side wall of outer cover 2 simultaneously
Fluted 15, support bar 16 is provided in groove 15, and 16 one end of support bar and 15 inner wall of groove are hinged, rout up in support bar 16
When abutting 1 top surface of well body, fixture block 8 and card slot 9 are in corresponding position, are just not necessarily to hand always during top cover 3 in this way
It mentions outer cover 2 to be operated, to be more convenient to operate, and operate more easily laborsaving.
Operation is above proposed for the ease of outer cover 2, the top of outer cover 2 is provided with bulge loop 17, the outer diameter of bulge loop 17 is greater than well
In addition the outer diameter of body 1 is provided with its fixing piece fixed with outer cover 2 on top cover 3, which includes being fixed on top cover 3
On limit plate 18, be provided with limiting slot 19 on the limit plate 18 and limit plate 18 be L-shaped, while offering on bulge loop 17 for limit
The recess portion 20 that position plate 18 is fallen into, operating shaft 21 is rotatably connected on the bottom wall of bulge loop 17, is fixed in operating shaft 21 positioned at recessed
Positive stop strip 22 in portion 20 and for being clamped with limiting slot 19, the end of operating shaft 21 is flushed with 17 bottom wall of bulge loop and end is opened
Handle hole 23(equipped with regular hexagon is as shown in Figure 4), keep the bottom surface of top cover 3 smooth during top cover 3 in this way
Be pressed in 2 top surface of outer cover, and limit plate 18 is located in recess portion 20 at this time, then by rotating operating shaft 21 positive stop strip 22 is blocked
Enter in limiting slot 19, realizes the fixation to top cover 3, so fixed mode good concealment, other people are not easy to find, and then can be very
Detection relevant device inside good protection, and be difficult to rotate operating shaft 21 to unlock limit in the case where no die nut
The clamping of position item 22 and limiting slot 19, plays good anti-theft effect；In addition it is provided on 3 periphery of top cover and cricoid blocks ring
24, and the outer diameter for blocking ring 24 is greater than 17 outer diameter of bulge loop, rainwater can be effectively reduced when rainy day passes through top cover 3 and outer
The junction gap of cover 2 enters the internal measurement relevant device caused inside influence, can play good waterproof action.
Detailed process: when needing to detect underground water, first by by 23 transfer of die nut insertion operation hole
Dynamic operating shaft 21 releases the clamping of positive stop strip 22 and limiting slot 19, then opens top cover 3, and fixture block 8 is in the first spring 12 at this time
Restoring force effect under from card slot 9 deviate from, while 7 stress of vertical bar rise to its end protrusion 2 top surface of outer cover, then outer cover 2 can
Be accommodated in sliding slot 5 with being moved down under self gravitation effect, facilitate at this time people to the detection relevant device at the well head into
Row operation or maintenance；After completing detection operation, cover is above mentioned to the position that can rout up support bar 16, then rout up support
Item 16 afterwards turns over top cover 3, top cover 3 will erect during this by its moving down in well head end face upper limit outer cover 2
Bar 7 pushes, and vertical bar 7 moves down and two fixture blocks 8 is pushed to remove and be caught in card slot 9 to two sides at this time, then turns by die nut
Dynamic operating shaft 21 is clamped positive stop strip 22 and limiting slot 19, finally turns back in groove 15 support bar 16, realizes at this time
The good protection to measurement relevant device in outer cover 2 is realized in fixation to top cover 3 and outer cover 2.
Embodiment 2: a kind of groundwater monitoring well protection structure, the difference from embodiment 1 is that the difference of linkage mechanism,
The linkage mechanism of the present embodiment includes connecting rod 25, and one end of the connecting rod 25 and vertical bar 7 are hinged, and the other end and fixture block 8 are hinged, and
The hinge joint of connecting rod 25 and vertical bar 7 is higher than the other end, so that the connecting rod 25 being obliquely installed can be applied during vertical bar 7 moves down
The power for giving 8 horizontal direction of fixture block is added to, so that fixture block 8 is caught in card slot 9, while return unit includes second spring in the present embodiment
26, one end of second spring 26 and vertical bar 7 are fixed, and 6 bottom wall of other end chamber is fixed, when top cover 3 does not cover, 7 meeting of vertical bar
2 top surface of outer cover is protruded in the restoring force lower end of second spring 26, while connecting rod 25 will pull fixture block 8 and move horizontally abjection card slot
9, to realize the linkage between vertical bar 7 and fixture block 8, and structure is simple.
Claims (10)
1. a kind of groundwater monitoring well protection structure, including well body (1), outer cover (2) are provided at the well head of the well body (1),
It is provided with top cover (3) at the top of the outer cover (2), both fixed fixing piece is provided between the top cover (3) and outer cover (2),
It is characterized in that: offering the sliding slot (5) for outer cover (2) vertical sliding on the well body (1), it is provided on the outer cover (2) perpendicular
Vertical bar (7) and vertical bar (7) one end protrusion outer cover (2) top surface to sliding, interior is provided with of the outer cover (2) are slided for vertical bar (7)
Chamber (6), slidably connect fixture block (8) on chamber (6) inner wall, be provided on sliding slot (5) inner wall and fixture block (8)
Clamping and holding outer cover (2) are in the external card slot (9) of sliding slot (5), are provided with the card that links when it is moved down on the vertical bar (7)
The mobile linkage mechanism for being caught in card slot (9) of block (8), the chamber (6) is interior to be provided with answering for driving fixture block (8) disengaging card slot (9)
Position part.
2. groundwater monitoring well protection structure according to claim 1, it is characterized in that: the linkage mechanism includes that setting exists
Vertical bar (7) bottom end and the lozenges (10) abutted with fixture block (8), the return unit include the first spring (12), first bullet
Spring (12) one end is fixed with chamber (6) inner wall, and the other end and fixture block (8) are fixed.
3. groundwater monitoring well protection structure according to claim 1, it is characterized in that: the linkage mechanism includes connecting rod
(25), described connecting rod (25) one end and fixture block (8) hingedly, the other end and vertical bar (7) hingedly, the connecting rod (25) and vertical bar (7)
Hinge joint be higher than hinge joint with fixture block (8), the return unit includes second spring (26), the two of the second spring (26)
End is fixed with vertical bar (7) and chamber (6) bottom wall respectively.
4. groundwater monitoring well protection structure according to claim 1, it is characterized in that: the outer cover (2) side wall offers
Groove (15) is hinged with support bar (16) in the groove (15), and the support bar (16) is routed up when abutting with well head roof, institute
It states fixture block (8) and card slot (9) and is in corresponding position.
5. groundwater monitoring well protection structure according to claim 2, it is characterized in that: the fixture block (8) is symmetrically arranged with
Two, the inclined-plane (11) with lozenges (10) cooperation is provided on the fixture block (8).
6. groundwater monitoring well protection structure according to claim 1, it is characterized in that: being provided on the outer cover (2) perpendicular
To conducting bar (13), sliding slot (5) inner wall be provided with conducting bar (13) cooperation guide groove (14).
7. groundwater monitoring well protection structure according to claim 1, it is characterized in that: the top of the outer cover (2) is arranged
Have bulge loop (17), the outer diameter of the bulge loop (17) is greater than the outer diameter of well body (1).
8. groundwater monitoring well protection structure according to claim 7, it is characterized in that: the top cover (3) side and outer cover
(2) hingedly, the fixing piece includes the limit plate (18) being arranged on top cover (3), offers limit on the limit plate (18)
Slot (19) is provided with the recess portion (20) fallen into for limit plate (18) on the bulge loop (17), and the bottom wall of the bulge loop (17) is worn
There is an operating shaft (21) being rotatablely connected with it, described operating shaft (21) one end is located in recess portion (20) and is fixed with and limiting slot
(19) positive stop strip (22) being clamped.
9. groundwater monitoring well protection structure according to claim 8, it is characterized in that: one end of the operating shaft (21) with
Bulge loop (17) bottom wall flushes and end offers the handle hole (23) of regular hexagon.
10. groundwater monitoring well protection structure according to claim 7, it is characterized in that: the outer diameter of the top cover (3) is greater than
Bulge loop (17) outer diameter, the edge of the top cover (3) is extended with downward blocks ring (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710891908.XA CN109577900B (en) | 2017-09-27 | 2017-09-27 | Underground water monitoring well protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710891908.XA CN109577900B (en) | 2017-09-27 | 2017-09-27 | Underground water monitoring well protection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109577900A true CN109577900A (en) | 2019-04-05 |
| CN109577900B CN109577900B (en) | 2020-10-23 |
Family
ID=65912441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710891908.XA Active CN109577900B (en) | 2017-09-27 | 2017-09-27 | Underground water monitoring well protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109577900B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927371A (en) * | 2020-08-04 | 2020-11-13 | 华运隆腾机械制造有限公司 | High pressure resistant blowout prevention safety seal wellhead protection device |
| CN114184758A (en) * | 2021-12-09 | 2022-03-15 | 广东省地质环境监测总站 | Intelligent underground water monitoring and protecting device |
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| CN206034552U (en) * | 2016-08-31 | 2017-03-22 | 陈玉春 | Groundwater monitoring well safety well head |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111927371A (en) * | 2020-08-04 | 2020-11-13 | 华运隆腾机械制造有限公司 | High pressure resistant blowout prevention safety seal wellhead protection device |
| CN114184758A (en) * | 2021-12-09 | 2022-03-15 | 广东省地质环境监测总站 | Intelligent underground water monitoring and protecting device |
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