CN109056818A - A kind of leak check well bellmouth convenient for operation - Google Patents
A kind of leak check well bellmouth convenient for operation Download PDFInfo
- Publication number
- CN109056818A CN109056818A CN201810979098.8A CN201810979098A CN109056818A CN 109056818 A CN109056818 A CN 109056818A CN 201810979098 A CN201810979098 A CN 201810979098A CN 109056818 A CN109056818 A CN 109056818A
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- Prior art keywords
- fixedly connected
- bellmouth
- annular
- cover board
- convenient
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- 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
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Sewage (AREA)
Abstract
The present invention relates to inspection shaft bellmouth technical fields, and disclose a kind of leak check well bellmouth convenient for operation, bellmouth including ring structure, edge offers annular slot at the upper end opening of bellmouth, cover board is connected in annular slot, the lower end of cover board is transversely provided with shaft, by the rotation connection of the first rolling bearing, there are two mounting blocks on the axial wall of shaft, the upper end of two mounting blocks is fixedly connected with the side wall of cover board, the left and right ends of shaft both pass through the first rolling bearing and have been respectively fixedly connected with the first screw rod and the second screw rod, screw shell is threaded on the bar wall of first screw rod and the second screw rod, and the upper end of screw shell is fixedly connected to link block, two opposite sides of link block are laterally fixedly connected with cross bar.This is convenient for the leak check well bellmouth of operation, installation when can be convenient construction, and good airproof performance junction should not reveal after installation, and the stink in pipeline can also be prevented to be dispersed into air.
Description
Technical field
The present invention relates to inspection shaft bellmouth technical field, specially a kind of leak check well bellmouth convenient for operation.
Background technique
Inspection shaft is used in buried plastics pipe road in one residential (residential area, public building area, plant area etc.) range
Outer diameter is not more than 6m no more than 800mm, the depth of burying, is generally located in drainage pipeline intersection, turning, caliber or the gradient and changes
Place, at drop etc., for the ease of inspect periodically, clean and dredge or the plastics integrated injection molding of down-hole operation inspection form or
It is brick at well shape structures.Plastics integrated injection molding inspection shaft refers to the main well seating portion for constituting inspection shaft using disposable note
It is moulded into type, pit shaft socket uses 360 degree of ring-like carrying platforms, and well bore and well seat bottom use netted reinforcing rib, and each bell and spigot is adopted
With ring-like reinforcing rib design.There are starting well seat, straight-through well seat, one eighth bend well seat, three driftings according to adapter tube number and angle difference
Seat, four drifting seats etc..In order to adapt to various drainage conditions, plastic inspection well is configured with reducer union, confluence connector, pit shaft simultaneously
The matched plastics integrated injection molding accessory such as polylinker.To ensure the smoothness and leakproofness of entire drainage system.
Currently, connection type is relatively more fixed when inspection shaft bellmouth is connected on pipeline, it is embedded in the pipeline of underground if it happens
Slight deformation may will make junction reveal, and the sewage of leakage permeates the ground, can serious polluted underground water and soil
Earth, and well head can not seal, so that the odor dispersion inside pipeline is into cavity.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of leak check well bellmouth convenient for operation, have close
Feng Xingqiang, it is quick and easy for installation the advantages that, solve bellmouth connection type and fix, stress be easy leakage sewage the problem of.
(2) technical solution
In order to achieve the above object, the invention provides the following technical scheme: a kind of hold convenient for the leak check well of operation
Mouthful, the bellmouth including ring structure, at the upper end opening of the bellmouth in along offering annular slot, card in the annular slot
It is connected to cover board, the lower end of the cover board is transversely provided with shaft, is rotatablely connected on the axial wall of the shaft by the first rolling bearing
There are two mounting blocks, the upper end of two mounting blocks is fixedly connected with the side wall of cover board, and the left and right ends of the shaft are equal
Across the first rolling bearing and it is respectively fixedly connected with the first screw rod and the second screw rod, the bar of first screw rod and the second screw rod
Screw shell is threaded on wall, and the upper end of screw shell is fixedly connected to link block, two link block phases
The side of back is laterally fixedly connected with cross bar, and the cross bar is fixedly connected with consolidating for triangular structure far from one end of link block
Determine block, the inner wall of the bellmouth offers the fixing groove of triangular structure, and the fixing groove is matched with fixed block, the connection
Block is fixedly connected with T-type sliding block far from one end of screw shell, and the lower end of the cover board offers T-type sliding slot, the T-type sliding slot
It is matched with T-type sliding block, first bevel gear is fixedly connected on the axial wall of the shaft, is passed through at the upper end center of the cover board
Second rolling bearing is rotatably connected to rotary shaft, and one end of the rotary shaft is fixedly connected with rectangular block, the rotary shaft it is another
One end passes through the second rolling bearing and is fixedly connected with second bevel gear, and the first bevel gear is engaged with second bevel gear, institute
The lower end for stating bellmouth is equipped with pipeline, and the annular link block of trapezium structure is fixedly connected at the upper end tube nozzle of the pipeline, described
The lower ending opening edge of bellmouth offers the enough annular grooves of trapezoidal section, and the annular groove is matched with annular link block, described
The inside of annular link block is opened up there are two symmetrical cavity, and position-limit mechanism is equipped in cavity.
Preferably, the position-limit mechanism includes two gag lever posts being horizontally installed in cavity, two gag lever post phases
Pair one end be fixedly connected to baffle, the same spring, the cavity phase are laterally fixedly connected between two baffles
Pair two sides offer rectangular through-hole, the gag lever post passes through rectangular through-hole far from one end of baffle and extends to annular groove
Interior, the side wall of the annular groove offers the limiting slot matched with gag lever post.
Preferably, the side wall of the annular slot is embedded that there are two the first annular sealing rings that are parallel to each other, described in two
The inside of first annular sealing ring is connected with the side wall of cover board.
Preferably, it is embedded with the second ring type seal on the outer wall and inner wall of the annular link block, two described the
Second ring sealing ring is connected with the side wall of annular groove respectively.
Preferably, mounting groove is offered at left and right sides of the upper end of the cover board, is equipped in two mounting grooves solid
Fixed pole, the both ends of the fixed link pass through third rolling bearing and are fixedly connected with the side wall of mounting groove, the bar of the fixed link
Handle is fixedly connected on wall, movable sleeve is connected to torque spring on the bar wall of the fixed link, one end of the torque spring with
The side wall of mounting groove is fixedly connected, and the other end of the torque spring is fixedly connected with the side wall of handle.
Preferably, the upper end of the cover board offers cylinder groove, and the rectangular block is located in cylinder groove, and rectangular block is upper
It is located at same level at end and the notch of cylinder groove.
Preferably, the lower end of the cover board is fixedly connected with ring-shaped rubber piece.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of leak check well bellmouth convenient for operation, having following has
Beneficial effect:
1, should be convenient for the leak check well bellmouth of operation, by the rectangular block in setting rotary shaft, rectangular block rotates band
Dynamic rotary shaft rotates second bevel gear, and second bevel gear rotation drives first bevel gear to rotate shaft, and shaft rotation drives
First screw rod and the second screw rod make two screw shell relative movements, and screw shell is mobile to drive link block to keep cross bar mobile, horizontal
Bar is mobile to drive fixed block to engage with fixing groove, so as to make cover board is firm to be fastenedly connected with bellmouth, and meanwhile it is first annular
Sealing ring and ring-shaped rubber piece can be sealed cover board and bellmouth, prevent the odor dispersion in pipeline into air.
It 2, should be convenient for the leak check well bellmouth of operation, by the way that gag lever post is arranged in cavity, when installation, even by annular
Block is connect to engage with annular groove, annular link block and annular groove squeeze the second ring type seal jointly when engaging, meanwhile, spring pushes
Baffle is mobile, and baffle is mobile to push gag lever post to engage with limiting slot, so as to limit to annular link block, so as to make
Pipeline when deforming, the second ring type seal can be sealed bellmouth and pipeline by the elastic force of itself.
Detailed description of the invention
Fig. 1 is a kind of leak check well bellmouth structure schematic diagram convenient for operation proposed by the present invention；
Fig. 2 is a kind of top view of leak check well bellmouth Fig. 1 convenient for operation proposed by the present invention；
Fig. 3 is the partial structurtes amplification in a kind of leak check well bellmouth Fig. 1 convenient for operation proposed by the present invention at A
Figure；
Fig. 4 is the partial structurtes amplification in a kind of leak check well bellmouth Fig. 1 convenient for operation proposed by the present invention at B
Figure.
In figure: 1 pipeline, 2 bellmouths, 3 cover boards, 4 cylinder grooves, 5 rectangular blocks, 6 mounting grooves, 7 handles, 8 first annular sealing rings,
9 second screw rods, 10 screw shells, 11 second bevel gears, 12 first bevel gears, 13 shafts, 14 mounting blocks, 15 first screw rods, 16
Torque spring, 17 fixed links, 18 annular link blocks, 19 gag lever posts, 20 cavitys, 21 springs, 22 baffles, 23 second ring packings
Circle, 24 ring-shaped rubber pieces, 25 T-type sliding blocks, 26 T-type sliding slots, 27 link blocks, 28 fixing grooves, 29 cross bars, 30 fixed blocks.
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.
Please refer to Fig. 1-4, a kind of leak check well bellmouth convenient for operation, the bellmouth 2 including ring structure, bellmouth 2
Upper end opening in along offering annular slot, cover board 3 is connected in annular slot, there are two the side wall of annular slot is embedded
The first annular sealing ring 8 being parallel to each other, the inside of two first annular sealing rings 8 are connected with the side wall of cover board 3, the
One ring type seal 8 can be sealed cover board 3 and bellmouth 2, and the lower end of cover board 3 is fixedly connected with ring-shaped rubber piece 24, the
One ring type seal 8 and ring-shaped rubber piece 24 can prevent stink to be dispersed into air, and the lower end of cover board 3 is transversely provided with shaft
13, by the rotation connection of the first rolling bearing there are two mounting blocks 14 on the axial wall of shaft 13, the upper end of two mounting blocks 14 is equal
It is fixedly connected with the side wall of cover board 3, the left and right ends of shaft 13 both pass through the first rolling bearing and have been respectively fixedly connected with first
Screw shell 10, and screw thread are threaded on the bar wall of screw rod 15 and the second screw rod 9, the first screw rod 15 and the second screw rod 9
The upper end of sleeve 10 is fixedly connected to link block 27, and two opposite sides of link block 27 are laterally fixedly connected with cross bar
29, cross bar 29 is fixedly connected with the fixed block 30 of triangular structure far from one end of link block 27, and the inner wall of bellmouth 2 offers three
The fixing groove 28 of angular structure, fixing groove 28 are matched with fixed block 31, and link block 27 is fixed far from one end of screw shell 10
It is connected with T-type sliding block 25, the lower end of cover board 3 offers T-type sliding slot 26, and T-type sliding slot 26 is matched with T-type sliding block 25, shaft 13
Axial wall on be fixedly connected with first bevel gear 12, rotation is rotatably connected to by the second rolling bearing at the upper end center of cover board 3
Shaft, one end of rotary shaft are fixedly connected with rectangular block 5, and the upper end of cover board 3 offers cylinder groove 4, and rectangular block 5 is located at cylinder groove
In 4, and be located at same level at the notch of the upper end of rectangular block 5 and cylinder groove 4, people facilitated to walk, rotary shaft it is another
End is across the second rolling bearing and is fixedly connected with second bevel gear 11, and first bevel gear 12 is engaged with second bevel gear 11, held
The lower end of mouth 2 is equipped with pipeline 1, and the annular link block 18 of trapezium structure, annular connection are fixedly connected at the upper end tube nozzle of pipeline 1
Be embedded with the second ring type seal 23 on the outer wall and inner wall of block 18, two the second ring type seals 23 respectively with annular groove
Side wall connect, the second ring type seal 23 can be sealed the junction of bellmouth 2 and pipeline 1, the lower end of bellmouth 2
Opening edge offers the enough annular grooves of trapezoidal section, and annular groove is matched with annular link block 18, annular link block 18 it is interior
Portion is opened up there are two symmetrical cavity 20, and position-limit mechanism is equipped in cavity 20, and position-limit mechanism includes being horizontally installed on sky
Two gag lever posts 19 in chamber 20, two opposite one end of gag lever post 19 are fixedly connected to baffle 22, between two baffles 22
It laterally is fixedly connected with the same spring 21, the opposite two sides of cavity 20 offer rectangular through-hole, and gag lever post 19 is far from baffle
22 one end passes through rectangular through-hole and extends in annular groove, and the side wall of annular groove offers the limit matched with gag lever post 19
The upper end left and right sides of slot, cover board 3 offers mounting groove 6, and fixed link 17 is equipped in two mounting grooves 6, fixed link 17
Both ends pass through third rolling bearing and are fixedly connected with the side wall of mounting groove 6, are fixedly connected with handle on the bar wall of fixed link 17
7, movable sleeve is connected to torque spring 16 on the bar wall of fixed link 17, one end of the torque spring 16 and side wall of mounting groove 6 is fixed connects
It connects, the other end of torque spring 16 is fixedly connected with the side wall of handle 7, and handle 7 pulls cover board 3 when facilitating inspection.
In conclusion should be convenient for leak check well bellmouth of operation, when installation, by annular link block 18 and annular groove card
It closing, annular link block 18 and annular groove squeeze the second ring type seal 23 jointly when engaging, meanwhile, spring 21 pushes baffle 22 to move
Dynamic, baffle 22 is mobile to push gag lever post 19 to engage with limiting slot, reaches and limits to annular link block 18, when inspection, uses spanner
Rectangular block 5 is turned, the rotation of rectangle 5 drives rotary shaft to rotate second bevel gear 11, and the rotation of second bevel gear 11 drives the first cone
Gear 12 rotates shaft 13, and the rotation of shaft 13 drives the first screw rod 15 and the second screw rod 9 to make two screw shells 10 are opposite to move
Dynamic, screw shell 10 is mobile to drive link block 27 to keep cross bar 29 mobile, and cross bar 29 is mobile to drive fixed block 30 and fixing groove 28 to block
It closes, so as to make cover board 3 is firm to be fastenedly connected with bellmouth 2, while first annular sealing ring 8 and ring-shaped rubber piece 24 can
Cover board 3 and bellmouth 2 are sealed, prevent the odor dispersion in pipeline into air.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
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 (7)
1. a kind of leak check well bellmouth convenient for operation, the bellmouth (2) including ring structure, it is characterised in that: described to hold
Along annular slot is offered at the upper end opening of mouth (2), it is connected in the annular slot cover board (3), the cover board (3)
Lower end is transversely provided with shaft (13), and by the rotation connection of the first rolling bearing, there are two mounting blocks on the axial wall of the shaft (13)
(14), the upper end of two mounting blocks (14) is fixedly connected with the side wall of cover board (3), the left and right ends of the shaft (13)
It both passes through the first rolling bearing and has been respectively fixedly connected with the first screw rod (15) and the second screw rod (9), first screw rod (15)
It is threaded with screw shell (10) on the bar wall of the second screw rod (9), and the upper end of screw shell (10) is fixedly connected with
Have link block (27), two opposite sides of the link block (27) are laterally fixedly connected with cross bar (29), the cross bar
(29) one end far from link block (27) is fixedly connected with the fixed block (30) of triangular structure, and the inner wall of the bellmouth (2) is opened
Fixing groove (28) equipped with triangular structure, the fixing groove (28) match with fixed block (31), and the link block (27) is remote
One end from screw shell (10) is fixedly connected with T-type sliding block (25), and the lower end of the cover board (3) offers T-type sliding slot (26),
The T-type sliding slot (26) matches with T-type sliding block (25), is fixedly connected with first bevel gear on the axial wall of the shaft (13)
(12), rotary shaft, one end of the rotary shaft are rotatably connected to by the second rolling bearing at the upper end center of the cover board (3)
It is fixedly connected with rectangular block (5), the other end of the rotary shaft passes through the second rolling bearing and is fixedly connected with second bevel gear
(11), the first bevel gear (12) is engaged with second bevel gear (11), and the lower end of the bellmouth (2) is equipped with pipeline (1), described
The annular link block (18) of trapezium structure, the lower ending opening side of the bellmouth (2) are fixedly connected at the upper end tube nozzle of pipeline (1)
The enough annular grooves of trapezoidal section are offered along place, the annular groove is matched with annular link block (18), the annular link block
(18) inside is opened up there are two symmetrical cavity (20), and position-limit mechanism is equipped in cavity (20).
2. a kind of leak check well bellmouth convenient for operation according to claim 1, it is characterised in that: the position restrainer
Structure includes two gag lever posts (19) being horizontally installed in cavity (20), and the opposite one end of two gag lever posts (19) is fixed
It is connected with baffle (22), is laterally fixedly connected with the same spring (21) between two baffles (22), the cavity (20)
Opposite two sides offer rectangular through-hole, and the gag lever post (19) passes through rectangular through-hole far from the one end of baffle (22) and extends
To annular groove, the side wall of the annular groove offers the limiting slot matched with gag lever post (19).
3. a kind of leak check well bellmouth convenient for operation according to claim 1, it is characterised in that: the annular snap
The side wall of slot is embedded that there are two the first annular sealing ring (8) that is parallel to each other, the insides of two first annular sealing rings (8)
Connected with the side wall of cover board (3).
4. a kind of leak check well bellmouth convenient for operation according to claim 1, it is characterised in that: the annular is even
It connects and is embedded with the second ring type seal (23) on the outer wall and inner wall of block (18), two second ring type seals (23) are equal
It is connected respectively with the side wall of annular groove.
5. a kind of leak check well bellmouth convenient for operation according to claim 2, it is characterised in that: the cover board
(3) it offers mounting groove (6) at left and right sides of upper end, is equipped with fixed link (17) in two mounting grooves (6), it is described solid
The both ends of fixed pole (17) pass through third rolling bearing and are fixedly connected with the side wall of mounting groove (6), the bar of the fixed link (17)
It is fixedly connected on wall handle (7), movable sleeve is connected to torque spring (16) on the bar wall of the fixed link (17), the torsion bullet
One end of spring (16) is fixedly connected with the side wall of mounting groove (6), the other end of the torque spring (16) and the side wall of handle (7)
It is fixedly connected.
6. a kind of leak check well bellmouth convenient for operation according to claim 1, it is characterised in that: the cover board
(3) upper end offers cylinder groove (4), and the rectangular block (5) is located in cylinder groove (4), and the upper end of rectangular block (5) and cylinder
It is located at same level at the notch of slot (4).
7. a kind of leak check well bellmouth convenient for operation according to claim 6, it is characterised in that: the cover board
(3) lower end is fixedly connected with ring-shaped rubber piece (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979098.8A CN109056818B (en) | 2018-08-27 | 2018-08-27 | Leakproofness inspection shaft bellmouth convenient to operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979098.8A CN109056818B (en) | 2018-08-27 | 2018-08-27 | Leakproofness inspection shaft bellmouth convenient to operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109056818A true CN109056818A (en) | 2018-12-21 |
| CN109056818B CN109056818B (en) | 2021-07-02 |
Family
ID=64757134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810979098.8A Active CN109056818B (en) | 2018-08-27 | 2018-08-27 | Leakproofness inspection shaft bellmouth convenient to operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109056818B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982388A (en) * | 2020-08-20 | 2020-11-24 | 马鞍山市瑞东仪表有限责任公司 | All-welding equipment for remote transmission sealing element |
| CN112977719A (en) * | 2021-03-22 | 2021-06-18 | 上海外高桥造船有限公司 | Ballast well protection frock |
| CN114192083A (en) * | 2021-11-11 | 2022-03-18 | 东台市光明机械密封有限公司 | High-pressure mechanical sealing device for ferrochrome alkaline oxidation reaction kettle |
| CN114855877A (en) * | 2022-04-19 | 2022-08-05 | 安徽建川市政工程有限公司 | Inspection shaft anti-falling safety protection device |
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| CN202273249U (en) * | 2011-08-26 | 2012-06-13 | 冷定刚 | Inspection well cover locking device |
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| CN204959738U (en) * | 2015-08-20 | 2016-01-13 | 宁波大学 | Prefabricated concrete tubular pile |
| CN205000365U (en) * | 2015-09-09 | 2016-01-27 | 成都易信达科技股份有限公司 | Anti -theft manhole cover |
| CN206928333U (en) * | 2017-07-18 | 2018-01-26 | 湖南天联复合材料有限公司 | A kind of mechanical type anti-theft well lid |
| CN107724286A (en) * | 2017-11-22 | 2018-02-23 | 高月江 | A kind of adjustable road height-limiting frame of road construction |
| CN108237462A (en) * | 2018-01-17 | 2018-07-03 | 徐志华 | A kind of construction steel tube derusting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202273249U (en) * | 2011-08-26 | 2012-06-13 | 冷定刚 | Inspection well cover locking device |
| CN204059344U (en) * | 2014-04-30 | 2014-12-31 | 百盛联合建设集团有限公司 | Plug-in type stake connecting structure |
| CN204959738U (en) * | 2015-08-20 | 2016-01-13 | 宁波大学 | Prefabricated concrete tubular pile |
| CN205000365U (en) * | 2015-09-09 | 2016-01-27 | 成都易信达科技股份有限公司 | Anti -theft manhole cover |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982388A (en) * | 2020-08-20 | 2020-11-24 | 马鞍山市瑞东仪表有限责任公司 | All-welding equipment for remote transmission sealing element |
| CN112977719A (en) * | 2021-03-22 | 2021-06-18 | 上海外高桥造船有限公司 | Ballast well protection frock |
| CN114192083A (en) * | 2021-11-11 | 2022-03-18 | 东台市光明机械密封有限公司 | High-pressure mechanical sealing device for ferrochrome alkaline oxidation reaction kettle |
| CN114855877A (en) * | 2022-04-19 | 2022-08-05 | 安徽建川市政工程有限公司 | Inspection shaft anti-falling safety protection device |
| CN114855877B (en) * | 2022-04-19 | 2023-11-03 | 安徽建川市政工程有限公司 | Inspection shaft anti-falling safety device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109056818B (en) | 2021-07-02 |
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