CN212428746U - High detection well head protection device of security - Google Patents
High detection well head protection device of security Download PDFInfo
- Publication number
- CN212428746U CN212428746U CN202021328933.0U CN202021328933U CN212428746U CN 212428746 U CN212428746 U CN 212428746U CN 202021328933 U CN202021328933 U CN 202021328933U CN 212428746 U CN212428746 U CN 212428746U
- Authority
- CN
- China
- Prior art keywords
- shell
- wall
- fixedly connected
- bolt
- casing
- 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.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000010030 laminating Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The utility model discloses a high-safety detection well mouth protection device, which comprises a shell and a foundation layer, wherein the inner bottom wall of the shell is symmetrically connected with two first bolts through screw threads, the inner side walls of the first bolts penetrate through the shell and are fixedly connected with the inside of the foundation layer, a well body penetrates through the center of the inner bottom wall of the shell, the outer side wall of the shell is laminated with three U-shaped plates, one adjacent sides of the three U-shaped plates are respectively laminated with one end of three pipe bodies, two sides of one end of each pipe body are laminated with L-shaped plate bodies, the front surface of each L-shaped plate body is in screw thread connection with a third bolt, the outer side wall of the third bolt penetrates through the L-shaped plate bodies and the pipe bodies in sequence and is matched with the L-shaped plate bodies and the U-shaped plates through the pipe bodies, the angle of the pipe bodies can be adjusted according to the height of a well mouth, and the shell is, convenient and fast, convenient to install and dismantle.
Description
Technical Field
The utility model relates to a detection well head protection technical field specifically is a high detection well head protection device of security.
Background
The detection well is a special well for detecting the change conditions of the water level, the water temperature and the water quality of underground water by a drilling method, along with the improvement of the construction of a detection network, in order to protect the detection well from being damaged, automatic detection equipment normally operates so as to obtain long-sequence underground water detection data, a wellhead protection device of the underground water detection well becomes an indispensable part, and along with the acceleration of an urbanization process, detection points are continuously damaged. The mode of destruction is usually the drill way landfill, puts into debris etc. in the well, and the result that causes is all serious, and drill way landfill or well put into debris, and the lighter needs well-flushing to repair, and serious can cause the check point to scrap, waste resource.
The invention is disclosed in China: a high-safety detection well mouth protection device (publication number: CN201820095429.7) discloses a protection device, which can adjust the position of a pressure plate by arranging a sliding ring and a threaded rod, so as to seal or open a well mouth pipe, improve the safety of the device, adjust the position of the pressure plate by rotating the threaded pipe, so as to better disassemble the device, arrange a lifting hole, so as to facilitate the opening and sealing of workers, but also have certain problems, foreign personnel can freely open the well lid and put sundries into the well, the well lid is easy to be damaged, and the events that the detection well is maliciously damaged and detection equipment is lost due to the damage or the theft of the well lid at the present stage frequently occur, not only extra expenditure is paid, but also the normal use of the detection well is delayed, therefore, the high-safety detection well mouth protection device is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high inspection shaft well head protection device of security to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-safety detection well mouth protection device comprises a shell and a foundation layer, wherein two first bolts are symmetrically in threaded connection with the inner bottom wall of the shell, one ends of the two first bolts penetrate through the shell and are fixedly connected to the inside of the foundation layer, a well body penetrates through the center of the inner bottom wall of the shell, three U-shaped plates are attached to the outer side wall of the shell, one ends of three pipe bodies are respectively attached to the adjacent sides of the three U-shaped plates, fourth bolts are respectively in threaded connection with the two ends of the three U-shaped plates, one end of each fourth bolt penetrates through one end of each pipe body, a gasket is attached to the front surface of each fourth bolt, an L-shaped plate body is attached to the other end of each pipe body, a third bolt is in threaded connection with the front surface of each L-shaped plate body, and the outer side wall of each third bolt sequentially penetrates through the L-shaped plate body, the upper surface of casing fixedly connected with apron down, there is the hinge one side of apron down through screwed connection, the apron articulates through the hinge has the upper cover plate down, the upper cover plate with the apron is laminated mutually down, one side fixedly connected with second handle of upper cover plate.
As further preferable in the present technical solution: the upper surface of the foundation course is fixedly connected with a wall body, the outer side of the wall body is fixedly connected with a fireproof plate, and the inner upper end of the wall body is fixedly connected with a partition plate.
As further preferable in the present technical solution: the front surface of the wall body is connected with two first handles through screws, and hinge locks are arranged on the outer sides of the two first handles in a winding mode.
As further preferable in the present technical solution: the utility model discloses a filter screen plate, including casing, the inside wall upper portion fixedly connected with couple of casing, the inside wall center department of casing sets up flutedly, the inside wall laminating of recess has the filter screen plate, the lower surface laminating of filter screen plate has the backup pad, the lateral wall fixed connection of backup pad in the inside wall of casing.
As further preferable in the present technical solution: the inside wall of casing rotates through the round pin axle and is connected with two third plate bodys, two the adjacent one side upper surface fixed connection of third plate body has two handles, two the outside of handle is around being equipped with the trick lock.
As further preferable in the present technical solution: the ventilation hole has been seted up on the inside wall upper portion of casing, the lower fixed surface of apron is connected with the second plate body down.
As further preferable in the present technical solution: and the upper surface of the L-shaped plate body is in threaded connection with a second bolt, and the second bolt penetrates through the L-shaped plate body and is fixedly connected with the foundation layer.
As further preferable in the present technical solution: the upper cover plate comprises an upper cover plate body, a lower cover plate body and a lock, wherein a first through hole is formed in one side of the upper surface of the upper cover plate body, a lock is arranged around the inner side wall of the first through hole, a first plate body is welded on the outer side wall of the shell, a third through hole is formed in one side of the first plate body, a second through hole is formed in one side of the lower cover plate body, and the lock penetrates through the first through hole, the second through hole and the third through hole in sequence.
Compared with the prior art, the beneficial effects of the utility model are that:
the protection device has the advantages that the shell is arranged outside the well body and is matched with the hinge lock to lock the shell, so that non-workers cannot open the shell, meanwhile, the coded lock is arranged inside the shell and is matched with the two third plate bodies, double protection on the wellhead of the detection well is achieved, the shell can be opened only when relevant workers of the detection well hold keys and codes, the situation that detection equipment is lost due to malicious damage of the detection well is effectively avoided, redundant expenditure is avoided, and use of the detection well is not delayed;
the device fixes the shell by arranging three U-shaped plates outside the shell to be matched with a fourth bolt, and then fixes the U-shaped plates by matching the pipe body and the third bolt with the L-shaped plates, so that the position of the shell is fixed, the stabilizing effect of the shell is improved, and the protection effect on the wellhead of the detection well is enhanced again;
thirdly, this device prevents through the isolated fire seed of PLASTIC LAMINATED that the conflagration condition from appearing in the inspection shaft well head, influences the detection achievement of inspection shaft, protects the inspection shaft well head, and simultaneously, the collocation wall body improves the protection effect to the casing, reaches the effect to the inspection shaft well head protection once more.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of the wall structure of the present invention;
fig. 4 is a schematic view of the internal structure of the wall body of the present invention;
FIG. 5 is an enlarged schematic view of the structure of the area A in FIG. 1 according to the present invention;
FIG. 6 is an enlarged view of the structure of the area B in FIG. 2 according to the present invention;
fig. 7 is a top view of the connection between the tube and the housing according to the present invention.
In the figure: 1. a well body; 2. a second bolt; 3. an L-shaped plate body; 4. a third bolt; 5. a pipe body; 6. a fourth bolt; 7. a U-shaped plate; 8. a ground layer; 9. a filter screen plate; 10. a groove; 11. a third plate body; 12. hooking; 13. a vent hole; 14. a second plate body; 15. a hinge; 16. an upper cover plate; 17. a lock; 18. a second handle; 19. a lower cover plate; 20. a first plate body; 21. a coded lock; 22. a support plate; 23. a housing; 24. a gasket; 25. a first bolt; 26. a hinge lock; 27. a first handle; 28. a fire-proof plate; 29. a partition plate; 30. a wall body; 31. a third handle; 32. a first through hole; 33. a second through hole; 34. a third via.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1-7, the present invention provides a technical solution: a high-safety detection well mouth protection device comprises a shell 23 and a foundation layer 8, wherein two first bolts 25 are symmetrically in threaded connection with the inner bottom wall of the shell 23, one side of each first bolt 25 penetrates through the shell 23 and is fixedly connected to the inner part of the foundation layer 8, a well body 1 penetrates through the center of the inner bottom wall of the shell 23, a plurality of U-shaped plates 7 are respectively attached to the outer side wall of the shell 23, one ends of three pipe bodies 5 are respectively attached to one adjacent sides of the U-shaped plates 7, fourth bolts 6 are respectively in threaded connection with the two ends of the U-shaped plates 7, the fourth bolts 6 penetrate through one ends of the pipe bodies 5, gaskets 24 are attached to the front surfaces of the fourth bolts 6, L-shaped plates 3 are attached to the other ends of the three pipe bodies 5, third bolts 4 are in threaded connection with the front surfaces of the L-shaped plates 3, the outer side walls of the third bolts 4 sequentially penetrate through the L-shaped plates 3 and the, one side of the lower cover plate 19 is connected with a hinge 15 through a screw, the lower cover plate 19 is hinged with an upper cover plate 16 through the hinge 15, the upper cover plate 16 is attached to the lower cover plate 19, and one side of the upper cover plate 16 is fixedly connected with a second handle 18.
In this embodiment, specifically: the upper surface of the ground base layer 8 is fixedly connected with a wall 30, the outer side wall of the wall 30 is fixedly connected with a fireproof plate 28, and the upper end inside the wall 30 is fixedly connected with a partition plate 29; protect the inspection shaft well head once more through setting up wall body 30, set up baffle 29 and make things convenient for the staff to place detection device, set up PLASTIC LAMINATED 28 and come to carry out fire protection to the well head, the material of PLASTIC LAMINATED 28 is cement.
In this embodiment, specifically: the front surface of the wall 30 is connected with two first handles 27 through screws, and hinge locks 26 are wound on the outer sides of the two first handles 27; personnel other than the staff are better isolated by the provision of the hinge lock 26.
In this embodiment, specifically: the upper part of the inner side wall of the shell 23 is fixedly connected with a hook 12, the center of the inner side wall of the shell 23 is provided with a groove 10, the inner side wall of the groove 10 is attached with a filter screen plate 9, the lower surface of the filter screen plate 9 is attached with a support plate 22, and the outer side wall of the support plate 22 is fixedly connected with the outer side wall of the shell 23; the groove 10 is arranged so that the filter screen plate 9 can be better attached to the shell 23, the hook 12 is arranged so that a worker can conveniently place a detection line, the filter screen plate 9 is arranged so as to prevent foreign matters outside a well mouth from drifting to the well and influencing a detection result, and the support plate 22 is arranged to better support the filter screen plate 9.
In this embodiment, specifically: the inner side wall of the shell 23 is rotatably connected with two third plate bodies 11 through a pin shaft, one side of the upper surfaces of the two third plate bodies 11 adjacent to each other is fixedly connected with two third handles 31, and the outer sides of the two third handles 31 are wound with coded locks 21; come to carry out the secondary protection to the well head through setting up trick lock 21 to the staff only need rotate the trick key and rotate out the password can, after untieing the password, the laminating casing 23 that hangs down naturally of third plate body 11.
In this embodiment, specifically: a vent hole 13 is formed in the upper portion of the inner side wall of the shell 23, and a second plate body 14 is fixedly connected to the lower surface of the lower cover plate 19; exchange the air in the casing 23 with the outside air through setting up ventilation hole 13, second plate 14 is located the place ahead of ventilation hole 13, shelters from debris in order to avoid debris to get into the casing 23 inside through ventilation hole 13.
In this embodiment, specifically: the upper surface of the L-shaped plate body 3 is in threaded connection with a second bolt 2, and the second bolt 2 penetrates through the L-shaped plate body 3 and is fixedly connected with the ground; through the arrangement, the second bolts 2 penetrate through the L-shaped plate bodies 3 and are fixedly connected to the inside of the foundation layer 8.
In this embodiment, specifically: a first through hole 32 is formed in one side of the upper surface of the upper cover plate 16, a lock 17 is wound on the inner side wall of the first through hole 32, a first plate body 20 is welded on the outer side wall of the shell 23, a third through hole 34 is formed in one side of the first plate body 20, a second through hole 33 is formed in one side of the lower cover plate 19, and the lock 17 sequentially penetrates through the upper cover plate 16, the lower cover plate 19 and the first plate body 20 through the first through hole 32, the second through hole 33 and the third through hole 34; through the arrangement, the lock 17 penetrates through the upper cover plate 16, the lower cover plate 19 and the first plate body 20, and the first plate body 20 is welded on the outer side wall of the shell 23, so that the upper cover plate 16 is combined with the shell 23 through the lock 17 after the lock 17 is connected in a penetrating manner.
In this embodiment, the height of the casing 23 is 700mm-900mm, which is convenient for the operator to operate the wellhead of the inspection well.
Working principle or structural principle, when in use, the inner bottom wall of the shell 23 is in threaded connection with a first bolt 25, the first bolt 25 penetrates through the shell 23 and is fixedly connected with a foundation layer 8, the outer side wall of the shell 23 is respectively attached with three U-shaped plates 7, one ends of three pipe bodies 5 are respectively attached to one adjacent sides of the three U-shaped plates 7, a fourth bolt 6 sequentially penetrates through the U-shaped plates 7 and the pipe bodies 5, the front surface of the fourth bolt 6 is attached with a gasket 24, the gasket 24 can enable the fourth bolt 6 and the U-shaped plates 7 to be more stable, one ends of the three pipe bodies 5 far away from the fourth bolt 6 are symmetrically attached with two L-shaped plate bodies 3, a second bolt 2 sequentially penetrates through the L-shaped plate bodies 3 and the pipe bodies 5, the upper surface of the L-shaped plate body 3 is in threaded connection with a second bolt 2, the second bolt 2 penetrates through the L-shaped plate body 3 and is fixedly connected with the foundation layer 8, an operator can, the upper surface of the shell 23 is fixedly connected with a lower cover plate 19, one side of the lower cover plate 19 is connected with a hinge 15 through a screw, the lower cover plate 19 is hinged with an upper cover plate 16 through the hinge 15, one end of the upper cover plate 16 is fixedly connected with a second handle 18, after a worker opens the lock 17 through a key, the upper cover plate 16 can be opened by holding the second handle 18, the outer side wall of the shell 23 is provided with a vent hole 13, so that air inside and outside the shell 23 can circulate, the second plate body 14 is positioned in front of the vent hole 13, external sundries can be effectively prevented from entering the shell 23 through the vent hole 13, one side adjacent to the upper surface of the third plate body 11 is fixedly connected with two third handles 31, a coded lock 21 is wound outside the two third handles 31, after the worker opens the coded lock 21 through a code, one end of a detection line can penetrate through the filter screen plate 9 and fall into a well, wall body 30 is fixed mutually with PLASTIC LAMINATED 28, makes the inside and outside circulation of air of wall body 30, through above setting, carries out triple protection to the inspection shaft well head, and the security is high, convenient and practical, can extensively use widely.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a high detection well head protection device of security, includes casing (23) and basement layer (8), its characterized in that: the inner bottom wall of the shell (23) is symmetrically in threaded connection with two first bolts (25), one ends of the two first bolts (25) penetrate through the shell (23) and are fixedly connected to the inside of the foundation layer (8), the center of the inner bottom wall of the shell (23) penetrates through the well body (1), the outer side wall of the shell (23) is attached with three U-shaped plates (7), one ends of three pipe bodies (5) are respectively attached to one adjacent sides of the three U-shaped plates (7), the two ends of the three U-shaped plates (7) are respectively in threaded connection with a fourth bolt (6), one end of the fourth bolt (6) penetrates through one end of each pipe body (5), a gasket (24) is attached to the front surface of the fourth bolt (6), and the three ends, far away from the fourth bolt (6), of the pipe bodies (5) are symmetrically attached with two L-shaped plate bodies (3), the utility model discloses a building roof, including L type plate body (3), body (23), upper surface fixedly connected with of casing (23) is lapped (19) down, the front surface threaded connection of L type plate body (3) has third bolt (4), the lateral wall of third bolt (4) runs through in proper order L type plate body (3) with body (5), the last fixed surface of casing (23) is lapped (19) down, screw fixedly connected with hinge (15) are passed through to one side of lapping (19) down, it has upper cover plate (16) to lap (19) articulated through hinge (15) down, upper cover plate (16) with lap (19) down and laminate mutually, one side fixedly connected with second handle (18) of upper cover plate (16).
2. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: the upper surface fixed connection of ground basic unit (8) has wall body (30), the lateral wall fixedly connected with PLASTIC LAMINATED (28) of wall body (30), the inside upper end fixedly connected with baffle (29) of wall body (30).
3. The wellhead protection device for the detection well with high safety according to claim 2, characterized in that: the front surface of the wall body (30) is fixedly connected with two first handles (27) through screws, and hinge locks (26) are wound on the outer sides of the two first handles (27).
4. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: the utility model discloses a filter screen plate, including casing (23), the inside wall upper portion fixedly connected with couple (12) of casing (23), the inside wall center department of casing (23) sets up recess (10), the inside wall laminating of recess (10) has filter screen plate (9), the lower surface laminating of filter screen plate (9) has backup pad (22), the lateral wall fixed connection of backup pad (22) in the inside wall of casing (23).
5. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: the inside wall of casing (23) is connected with two third plate bodys (11), two through the round pin axle rotation one side adjacent three plate bodys (11) upper surface fixedly connected with two third handle (31), two the outside of third handle (31) is around being equipped with trick lock (21).
6. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: vent hole (13) have been seted up on the inside wall upper portion of casing (23), the lower fixed surface of lower apron (19) is connected with second plate body (14).
7. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: the upper surface threaded connection of L type plate body (3) has second bolt (2), second bolt (2) run through L type plate body (3) and with ground basic unit (8) fixed connection.
8. The wellhead protection device for the detection well with high safety according to claim 1, characterized in that: first through-hole (32) have been seted up to upper surface one side of upper cover plate (16), the inside wall of first through-hole (32) is around being equipped with tool to lock (17), the lateral wall welding of casing (23) has first plate body (20), third through-hole (34) have been seted up to one side of first plate body (20), second through-hole (33) have been seted up to one side of apron (19) down, tool to lock (17) pass through first through-hole (32), second through-hole (33) run through in proper order with third through-hole (34) upper cover plate (16), apron (19) and first plate body (20) down.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202021328933.0U CN212428746U (en) | 2020-07-08 | 2020-07-08 | High detection well head protection device of security |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202021328933.0U CN212428746U (en) | 2020-07-08 | 2020-07-08 | High detection well head protection device of security |
Publications (1)
Publication Number | Publication Date |
---|---|
CN212428746U true CN212428746U (en) | 2021-01-29 |
Family
ID=74278501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202021328933.0U Expired - Fee Related CN212428746U (en) | 2020-07-08 | 2020-07-08 | High detection well head protection device of security |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN212428746U (en) |
-
2020
- 2020-07-08 CN CN202021328933.0U patent/CN212428746U/en not_active Expired - Fee Related
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111335910B (en) | Method for opening cabin of shield tunneling machine to overhaul and replace cutter | |
CN211715092U (en) | Safety wellhead mechanism for underground water monitoring | |
CN212428746U (en) | High detection well head protection device of security | |
CN105863030B (en) | A kind of inspection shaft well lid and the inspection shaft for pipe gallery internal drainage pipeline | |
CN204734893U (en) | Fire hydrant with monitoring devices | |
CN210193252U (en) | Climb a formula tower crane driver passageway that adheres to | |
CN218062099U (en) | Special fireproof door for inspection robot | |
CN208793029U (en) | Multi-clove type Explosion Door of Air Shaft | |
CN209562092U (en) | Ground type cable intermediate joint case | |
CN217379004U (en) | Sewer well cover plate | |
CN207244671U (en) | A kind of pipe gallery well lid being opened and closed using chain making machine | |
CN214525879U (en) | Skid-mounted integrated temporary storage room for dangerous waste | |
CN207332341U (en) | Protective shed structure of reserved hole of tower crane | |
CN209243774U (en) | A kind of reliable inside and outside pipe gallery escape hatch's cover board opened | |
CN210088114U (en) | Valve protection device for drainage pipe of runoff pond | |
CN108278065A (en) | Storage hole maintenance side-by-side gate | |
CN210562244U (en) | Sealing device for joint of inspection well and shaft | |
CN221799264U (en) | Portable pile casing protector that digs soon | |
CN207686526U (en) | Typhoon protection protects window | |
CN206784434U (en) | A kind of basement waterproofing drainage structure | |
CN207686556U (en) | People's air defense explosion proof door | |
CN215801809U (en) | Novel underground pipe gallery hydraulic pressure well lid of fleing | |
CN219932250U (en) | Explosion door for underground refuge chamber | |
CN215565835U (en) | Concentric type double-pipe gas injection blowout preventer for wellhead | |
CN211340868U (en) | Safe practical fire control is got well lid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210129 |