CN110002134A - A kind of modified manhole well - Google Patents
A kind of modified manhole well Download PDFInfo
- Publication number
- CN110002134A CN110002134A CN201910307082.7A CN201910307082A CN110002134A CN 110002134 A CN110002134 A CN 110002134A CN 201910307082 A CN201910307082 A CN 201910307082A CN 110002134 A CN110002134 A CN 110002134A
- Authority
- CN
- China
- Prior art keywords
- well
- standpipe
- pedestal
- link block
- hot melt
- 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
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 239000012943 hotmelt Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000009827 uniform distribution Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 238000001175 rotational moulding Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/10—Manholes; Inspection openings; Covers therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sewage (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a kind of modified manhole wells, it can be used for being mounted on the oil storage tank of gas station, its structure includes well body and well lid, mainly well body is constituted using the standpipe and pedestal of partial installation, independent rotational moulding can be facilitated to manufacture and reduce well body volume, convenient for packaging and transport, moreover it is possible to be powered by the hot melt disk line on the installation contact surface between standpipe and pedestal, it is integral that will heat between the two, therefore assembling process is comparatively simple, convenient;Meanwhile mutually being tensed standpipe and pedestal using the structure of lower fixed drawstring, with the accuracy and reliability for facilitating hot melt to operate;Multiple tracks cutting groove is set also on standpipe to promote the planarization of cut surface, reinforces the connection between well lid and well body in conjunction with the structure of upper fixed drawstring, so that the lid promoted between the two closes sealing performance;In addition, being provided with exploration hole on well lid, protruded into manhole well for detecting element, so that convenient discovery oil liquid leakage in time, plays the role of prevention alarm.
Description
Technical field
The present invention relates to a kind of manhole wells used for gas station, and in particular to a kind of modified manhole well.
Background technique
Manhole well is a kind of manhole well bucket being mounted on gas station's oil storage tank, is to be made of two components mostly, that is, divides
The well body and well lid of not independent rotation molding, which is covered on the well head at the top of well body, due to manhole well
It is a kind of biggish rotomoulded articles of volume, although well lid can be dismantled individually, well body is integrally formed component, larger
Volume often to give manufacture, packaging and conveyer belt greatly inconvenient;Meanwhile manhole well is embedding be mounted on underground after, due to peace
The difference of holding position often will appear well body upper end and basset, then requires to carry out cutting process, usually be relied on by worker
Experience is arbitrarily cut, and results in the not smooth enough of cut surface, and well lid rely primarily on the conjunction of own wt lid realized on well head it is close
Envelope, it is less reliable that this makes the lid of well lid close sealing performance;In addition, when there is oil leak in oil storage tank, since its is buried in underground,
And the manhole well of top is also to be installed using underground buried, and manhole well used at present is all full-closed structure, thereon
It is not directed to the structure design being packed into for detecting element, oil liquid leakage is allowed in this way and can not be found in time, to cause
The pollution of oil liquid loss and underground.
Summary of the invention
The technical problem to be solved by the present invention lies in overcoming the defects of the prior art and provide it is a kind of manufacture, packaging and fortune
Defeated convenience, sealed reliable, a kind of modified manhole well that detecting element can be facilitated to be packed into and prevent oil liquid leakage.
Technical problem of the invention is achieved through the following technical solutions:
A kind of modified manhole well, including well body and well lid, the well lid detachable are covered on the well head at the top of well body, institute
The well body stated is made of the standpipe of partial installation and pedestal, and hot melt disk is equipped on the installation contact surface between standpipe and pedestal
Line, and be powered and heat the standpipe and pedestal integral through the hot melt disk line.
The lower riser end is equipped with horn-like lower port, and the inner peripheral surface of the lower port, which is equipped with, is embedded in fixed heat
Molten disk line, and anode and the exposed side for being mounted on standpipe of cathode of disk line are heated, the pedestal upper end is equipped with the upper of cone cell
Port, the lower end mask close in upper port, which is in close contact on the cone cell outer circumference surface of upper port.
The lower port inner peripheral surface is equipped with multiple tracks and makees to be embedded in fixed installation annular groove, lower end for the hot melt disk line
The end face of mouth is equipped with the caulking groove installed for the anode and cathode.
The riser upper is the cylindrical drum of a disjunctor, and the outer circumference surface of the cylindrical drum is equipped with multiple tracks from top to bottom
The cutting groove being equally spaced often is equipped with link block between adjacent twice cutting groove, is accordingly equipped on well lid outer circumference surface
The top link block of the corresponding upper link block is equipped with the upper fixation that detachable tenses mutually between the top link block and upper link block
Drawstring.
The pedestal lower part is also the cylindrical drum of a disjunctor, and the outer circumference surface of the cylindrical drum is identical by muti-piece shape
Rectangle plane circumference uniform distribution enclose, on the excircle of cylindrical drum be equipped with multiple circumference uniform distributions lower connecting block, each
The lower fixed drawstring that detachable tenses mutually is equipped between any road cutting groove on lower connecting block and the standpipe.
The upper fixed drawstring is made of " dry " font connector and connector sleeve, and the top link block is two convex
Block is somebody's turn to do " dry " font connector detachable and is inlaid between two convex blocks, and connector sleeve detachable is sleeved on link block.
The lower fixed drawstring is made of connection ring and connector sleeve, which is sleeved on any road on standpipe and cuts
It cuts in slot, connector sleeve detachable is sleeved on lower connecting block.
The installation of center symmetric setting lacks there are two setting on the well lid, equipped with gas vent and spy in any installation lacks
Gaging hole.
The well lid bottom surface, which is equipped with, is embedded in fixed sealing ring, and well lid is covered in the well head through the sealing ring
On.
Well lid, standpipe and the pedestal is independent rotation molding.
Compared with prior art, the present invention is mainly the standpipe and pedestal structure that the well body of manhole well is used to partial installation
At, the independent rotational moulding manufacture of two components had not only been facilitated in this way, but also reduced the volume of well body, consequently facilitating packaging and transport,
And behind entrance erecting bed, it can be powered, can be incited somebody to action by the hot melt disk line on the installation contact surface between standpipe and pedestal
Hot melt is integral between the two, therefore assembling process is comparatively simple, convenient;Meanwhile using the structure of lower fixed drawstring by standpipe
It is mutually tensed with pedestal, with the accuracy and reliability for facilitating hot melt to operate;Multiple tracks cutting groove is set also on standpipe to be promoted
Both the planarization of cut surface reinforces the connection between well lid and well body in conjunction with the structure of upper fixed drawstring, thus promoted
Between lid close sealing performance;In addition, being provided with exploration hole on well lid, protruded into manhole well for detecting element, thus convenient
Discovery oil liquid leakage in time plays the role of prevention alarm.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the perspective view of Fig. 1.
Fig. 3 is A-A cross-sectional view of Fig. 1.
Fig. 4 is enlarged drawing at the B of Fig. 3.
Fig. 5 is the stereogram exploded view of Fig. 2.
Specific embodiment
It will elaborate again by above-mentioned attached drawing to the embodiment of the present invention below.
As shown in Fig. 1 ~ Fig. 5,1. well bodies, 11. pedestals, 111. lower connecting blocks, 112. upper ports, 12. standpipes, 121. cuttings
Slot, link block on 122., 123. lower ports, 124. installation annular grooves, 2. well lids, 21. top link blocks, 22. installations lack, 23. exhausts
Hole, 24. exploration holes, fix on 3. drawstring, 31. " dry " font connectors, 4. lower fixed drawstrings, 41. connection rings, 34. connector sleeves,
5. sealing ring, 6. hot melt disk lines, 61. anodes, 62. cathode.
A kind of modified manhole well is related to a kind of manhole being mounted on gas station's oil storage tank as shown in Fig. 1 ~ Fig. 3, Fig. 5
Well bucket, structure are mainly made of well body 1 and well lid 2 etc., which is covered in the well head at 1 top of well body
On, and well body 1 is to be made of the standpipe 12 of partial installation and pedestal 11, therefore well lid 2, standpipe 12 and pedestal 11 can carry out list
Only rotation molding.
Therefore, by manhole well composed by three individual rotational moulding components, rotational moulding manufacture had not only been facilitated, but also has reduced production
Standpipe 12 can be first inverted and be packed into pedestal 11, then well lid 2 is inverted into for packaging and transport by product volume
In standpipe 12, at this time the overall volume of three components it is practical only entire pedestal 11 volume, therefore compared to tradition one at
The manhole well of type, volume can significantly reduce, and transport also more convenient.
12 top of standpipe is the cylindrical drum of a disjunctor, the outer circumference surface of the cylindrical drum be equipped with multiple tracks by upper and
Under the cutting groove 121 that is equally spaced, effect is: past due to the difference of installation site after manhole well is embedding is mounted on underground
It bassets toward will appear 1 upper end of well body, traditional way is that cutting process is by virtue of experience carried out by worker, such cutting behaviour
To make to exist random, the lid for being easy to cause the out-of-flatness of cut surface, and then influencing later period well lid 2 closes sealing performance, and by cutting
It is not only able to accurately control cutting-height after cutting slot 121, and can also accomplish more smooth cut surface, also greatly facilitate work
The cutting operation of people.
Meanwhile rectangular-shaped upper link block 122 is equipped between every adjacent twice cutting groove 121, quantity is same flat
Settable multiple in face, the present embodiment is arranged four according to the form of circumference uniform distribution, then accordingly sets on the outer circumference surface of well lid 2
There is the top link block 21 of corresponding upper 122 quantity of link block and position, i.e., is also provided with the corresponding top connection in four positions on well lid 2
Block 21, each top link block 21 are made of two convex blocks, and the corresponding upper link block 122 in each position and top link block 21 are equal
One group is constituted, and is equipped with the upper fixed drawstring that detachable tenses mutually between every group of upper link block 122 and top link block 21
3, then 1 top of well lid 2 and well body, namely 12 top of standpipe well can be achieved with by the upper fixed drawstring 3 of four groups of connections
Sealing cover between mouthful closes.
The upper fixed drawstring 3 is made of " dry " font connector 31 and connector sleeve 34, tightening structure are as follows: " dry "
31 detachable of font connector is inlaid between two convex blocks for constituting top link block 21, and 34 detachable of connector sleeve is sleeved on company
It connects on block 122, and is equipped in 2 bottom surface of well lid and is embedded in fixed sealing ring 5, then by upper fixed drawstring 3 by well lid 2 and well body
After 1 mutually tenses, well lid 2 sealed can enclose 5 and be covered on well head, to realize that lid between the two closes leakproofness
Energy.
11 lower part of pedestal is also the cylindrical drum of a disjunctor, and the outer circumference surface of the cylindrical drum is by muti-piece shape phase
Same rectangle plane circumference uniform distribution encloses, and is to facilitate external pipe when being connected to pedestal 11 using this structure, guarantees
Contact surface is a plane always, thus can be reduced phenomena such as connection leakage is easy to produce when connecting with cambered surface;It is described
Cylindrical outer tube circumference on be additionally provided with the rectangular-shaped lower connecting blocks 111 of multiple circumference uniform distributions, the present embodiment is provided with altogether four
The lower connecting block 111 of circumference uniform distribution.
The standpipe 12 and the package assembly of pedestal 11 is as shown in Figure 3, Figure 4: 12 lower end of standpipe be equipped with it is horn-like under
Port 123, the inner peripheral surface of the lower port are equipped with multiple tracks and install annular groove 124, and are equipped with to be embedded in the installation annular groove and fix
Hot melt disk line 6, set that there are two caulking grooves on the end face of lower port 123, then the anode 61 and cathode 62 for heating 6 both ends of disk line are just
It is separately mounted in two caulking grooves, so that anode 61 and cathode 62 exposed can be mounted on the side of standpipe 12, with convenient
Overlap joint is powered.
11 upper end of pedestal is equipped with the upper port 112 of cone cell, when standpipe 12 is closed by the cover of lower port 123 in upper port
When on 112, which will be in close contact on the cone cell outer circumference surface of upper port 112, that is, hot melt disk line 6 is arranged
On installation contact surface between standpipe 12 and pedestal 11, heating at this time can be by 11 heat of standpipe 12 and pedestal after disk line 6 is powered
It is melt into one.
The on-site assembly between pedestal 11 and standpipe 12 can be made simpler, convenient by this hot melting way, and in order to
The accuracy and reliability of hot melt operation are promoted, also settable lower fixed drawstring 4 carries out temporarily between standpipe 12 and pedestal 11
It tenses, which be made of connection ring 41 and connector sleeve 34, interim tightening structure are as follows: connection ring 41 is sleeved on vertical
In any road cutting groove 121 on pipe 12,34 detachable of connector sleeve is sleeved on lower connecting block 111, that is to say, that outside pedestal 11
Detachable is equipped between any road cutting groove 121 on each lower connecting block 111 on periphery and standpipe 12 to tense mutually
Lower fixed drawstring 4.
In addition, the installation for being additionally provided with two center symmetric settings on well lid 2 lacks 22, gas vent is equipped in any installation lacks
23 and exploration hole 24, then it is protruded into manhole well by exploration hole for detecting element, thus the convenient internal oil of discovery in time
Prevention alarm is played the role of in leakage.
The above is only specific embodiments of the present invention, it should be appreciated by those skilled in the art that any and embodiment
Equivalent structure design, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of modified manhole well, including well body (1) and well lid (2), which is covered at the top of well body (1)
Well head on, it is characterised in that the well body (1) is made of the standpipe (12) of partial installation and pedestal (11), in standpipe
(12) the installation contact surface between pedestal (11) is equipped with hot melt disk line (6), and is powered and described will stand through the hot melt disk line
It is integral to manage (12) and pedestal (11) hot melt.
2. a kind of modified manhole well according to claim 1, it is characterised in that standpipe (12) lower end is equipped with loudspeaker
The lower port (123) of shape, the inner peripheral surface of the lower port, which is equipped with, is embedded in fixed hot melt disk line (6), and heats disk line
Positive (61) and the exposed side for being mounted on standpipe (12) of cathode (62), the pedestal (11) upper end are equipped with the upper port of cone cell
(112), the lower port (123) cover closes on upper port (112), which is in close contact in upper port (112)
Cone cell outer circumference surface on.
3. a kind of modified manhole well according to claim 2, it is characterised in that described lower port (123) inner peripheral surface
It is equipped with multiple tracks to make to be embedded in fixed installation annular groove (124) for hot melt disk line (6), the end face of lower port (123) is equipped with
For the caulking groove of positive (61) and cathode (62) installation.
4. a kind of modified manhole well according to claim 1, it is characterised in that described standpipe (12) top is one
The cylindrical drum of disjunctor, the outer circumference surface of the cylindrical drum is equipped with the cutting groove (121) that multiple tracks is from top to bottom equally spaced, per adjacent
It is equipped with link block (122) between twice cutting groove, the corresponding upper link block is accordingly equipped on well lid (2) outer circumference surface
(122) top link block (21) is equipped with the upper fixed drawing that detachable tenses mutually between the top link block and upper link block (122)
Band (3).
5. a kind of modified manhole well according to claim 4, it is characterised in that described pedestal (11) lower part is also one
The cylindrical drum of a disjunctor, the outer circumference surface of the cylindrical drum are enclosed by the identical rectangle plane circumference uniform distribution of muti-piece shape,
The lower connecting block (111) of multiple circumference uniform distributions, each lower connecting block (111) and the standpipe are equipped on the excircle of cylindrical drum
(12) the lower fixed drawstring (4) that detachable tenses mutually is equipped between any road cutting groove (121) on.
6. a kind of modified manhole well according to claim 4, it is characterised in that the upper fixed drawstring (3) be by
" dry " font connector (31) and connector sleeve (34) are constituted, and the top link block (21) is two convex blocks, should " dry " font company
Connector (31) detachable is inlaid between two convex blocks, and connector sleeve (34) detachable is sleeved on link block (122).
7. a kind of modified manhole well according to claim 5, it is characterised in that the lower fixed drawstring (4) is by even
It connects ring (41) and connector sleeve (34) is constituted, which is sleeved on any road cutting groove (121) on standpipe (12) Nei, even
Female connector (34) detachable is sleeved on lower connecting block (111).
8. a kind of modified manhole well according to claim 1, it is characterised in that set on the well lid (2) there are two in
Symmetrically arranged install of the heart lacks (22), is equipped with gas vent (23) and exploration hole (24) in any installation lacks.
9. a kind of modified manhole well according to claim 1, it is characterised in that well lid (2) bottom surface, which is equipped with, to be embedded in
Fixed sealing ring (5), and well lid is covered on the well head through the sealing ring (5).
10. a kind of modified manhole well according to claim 1, it is characterised in that the well lid (2), standpipe (12) and
Pedestal (11) is independent rotation molding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910307082.7A CN110002134B (en) | 2019-04-17 | 2019-04-17 | Improved manhole well |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910307082.7A CN110002134B (en) | 2019-04-17 | 2019-04-17 | Improved manhole well |
Publications (2)
Publication Number | Publication Date |
---|---|
CN110002134A true CN110002134A (en) | 2019-07-12 |
CN110002134B CN110002134B (en) | 2024-07-16 |
Family
ID=67172397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910307082.7A Active CN110002134B (en) | 2019-04-17 | 2019-04-17 | Improved manhole well |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110002134B (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1854399A (en) * | 2005-04-26 | 2006-11-01 | 努皮股份公司 | Compound plastic well with inductive fuse component |
KR100944028B1 (en) * | 2009-08-14 | 2010-02-24 | (주)창원기술개발 | Square manhole cover that have araising function |
US20110315697A1 (en) * | 2008-10-03 | 2011-12-29 | Petrotechnik Limited | Improved tank collar |
CN203007982U (en) * | 2012-11-28 | 2013-06-19 | 广西建工集团第三建筑工程有限责任公司 | High-strength corrugated detachable assembled inspection well |
CN203878620U (en) * | 2014-05-05 | 2014-10-15 | 姜文尧 | Sealing inspection well lid |
CN204326105U (en) * | 2014-12-18 | 2015-05-13 | 王一峰 | A kind of plastic inspection well |
CN204825966U (en) * | 2015-06-12 | 2015-12-02 | 上海亚大塑料制品有限公司 | Modular inspection shaft |
CN207698484U (en) * | 2017-12-13 | 2018-08-07 | 衡水优捷特石油设备科技有限公司 | A kind of adjustable for height flexible connection manhole shaft |
CN209834600U (en) * | 2019-04-17 | 2019-12-24 | 慈溪市德顺容器有限公司 | Improved manhole well |
-
2019
- 2019-04-17 CN CN201910307082.7A patent/CN110002134B/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1854399A (en) * | 2005-04-26 | 2006-11-01 | 努皮股份公司 | Compound plastic well with inductive fuse component |
US20110315697A1 (en) * | 2008-10-03 | 2011-12-29 | Petrotechnik Limited | Improved tank collar |
KR100944028B1 (en) * | 2009-08-14 | 2010-02-24 | (주)창원기술개발 | Square manhole cover that have araising function |
CN203007982U (en) * | 2012-11-28 | 2013-06-19 | 广西建工集团第三建筑工程有限责任公司 | High-strength corrugated detachable assembled inspection well |
CN203878620U (en) * | 2014-05-05 | 2014-10-15 | 姜文尧 | Sealing inspection well lid |
CN204326105U (en) * | 2014-12-18 | 2015-05-13 | 王一峰 | A kind of plastic inspection well |
CN204825966U (en) * | 2015-06-12 | 2015-12-02 | 上海亚大塑料制品有限公司 | Modular inspection shaft |
CN207698484U (en) * | 2017-12-13 | 2018-08-07 | 衡水优捷特石油设备科技有限公司 | A kind of adjustable for height flexible connection manhole shaft |
CN209834600U (en) * | 2019-04-17 | 2019-12-24 | 慈溪市德顺容器有限公司 | Improved manhole well |
Also Published As
Publication number | Publication date |
---|---|
CN110002134B (en) | 2024-07-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN206035508U (en) | Shield tunnel segment bolt hole waterproof seal device | |
CN110002134A (en) | A kind of modified manhole well | |
CN205732823U (en) | A kind of low pressure loses the close casting system of cerotin | |
CN209834600U (en) | Improved manhole well | |
CN209834601U (en) | Novel manhole well | |
CN205986083U (en) | Electricity cable tube plugging device | |
CN206739355U (en) | A kind of sealing structure for being used to fix floating type cyclone | |
CN106838511B (en) | Antiseep concrete pipe culvert bell and spigot frame | |
CN206449198U (en) | A kind of steam turbine generator injecting glue type oil seal structure | |
CN110002135A (en) | A kind of novel man-hole well | |
CN207717258U (en) | A kind of heat watch shell | |
CN209100835U (en) | A kind of water-cooling flange good with heating wire sealing effect | |
CN208859149U (en) | A kind of protection flange convenient for subdivision | |
CN207229760U (en) | A kind of air inflation sealing device for stainless steel pipes welding | |
CN207285878U (en) | A kind of electric kettle easy for installation | |
CN202336154U (en) | Medical gas interface device | |
CN218264211U (en) | Universal transverse row adaptor for floor drain | |
CN212206490U (en) | Tightness detection device for underground outer wall inlet and outlet pipeline | |
CN204358299U (en) | Pipe-line system fixes uses flange | |
CN205052021U (en) | Top cap mounting structure | |
CN215596465U (en) | Ball valve | |
CN214614476U (en) | Pre-buried large-flow floor drain | |
CN213063372U (en) | Flue gas sealing shutter plate | |
CN209041806U (en) | A kind of water supply and sewage work drainpipe connecting apparatus | |
CN203256789U (en) | Combined plastic inspection well |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |