CN110578365A - shock attenuation flood discharge scour protection rotatory well lid device - Google Patents
shock attenuation flood discharge scour protection rotatory well lid device Download PDFInfo
- Publication number
- CN110578365A CN110578365A CN201910929881.8A CN201910929881A CN110578365A CN 110578365 A CN110578365 A CN 110578365A CN 201910929881 A CN201910929881 A CN 201910929881A CN 110578365 A CN110578365 A CN 110578365A
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- well
- seat
- well seat
- lid
- cover
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- 230000035939 shock Effects 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims description 16
- 230000006978 adaptation Effects 0.000 claims description 9
- 238000009991 scouring Methods 0.000 claims 5
- 230000002265 prevention Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
- E03F2005/068—Gully gratings with means for enhancing water flow
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
the invention discloses a shock-absorbing flood discharge scour prevention rotating well lid device, which comprises a well seat and a well lid, wherein the well lid is embedded into the well seat, the well seat and the well lid are utilized to jointly bear the external vehicle pressure, and the well seat and the well lid are utilized to be extremely small in gap or completely engaged with an engaging opening of the well seat and the well lid, so that the vibration of the well lid is reduced; meanwhile, the well cover is embedded into the well seat to prevent the underground water pressure from being too high, and the well cover is directly lifted; the well seat is provided with a well seat top baffle and a well seat blade groove, the well cover is provided with a well cover blade, the well cover blade is matched with the well seat blade groove, the well cover blade and the well seat top baffle are of mutually matched corrugated structures, the well seat is provided with a well seat drain hole, the well seat drain hole is provided with a well plug rod, and the well plug rod is inserted into the well seat drain hole when water is not accumulated on the road surface by utilizing the well plug rod, so that the well plug rod, the well cover and the well seat form a whole body and bear pressure together; when water is accumulated on the road surface, the four well inserting rods are drawn out, and the flood is quickly discharged through the drain holes of the well base, so that the pressure of small flood discharge amount of the well cover is relieved. The well plunger is small and portable, and is easy to take out and replace.
Description
Technical Field
the invention relates to the field of well lids, in particular to a shock-absorbing flood-discharging scour-preventing rotary well lid device.
background
The well lid is used for covering a road or a deep well at home and preventing people or objects from falling. The material can be divided into a metal well cover, a high-strength fiber cement concrete well cover, a resin well cover and the like. A circular shape is generally used. Can be used for green belts, sidewalks, motor vehicle lanes, wharfs, alleys and the like. Nowadays, communication and electronic technology are developed day by day, and the design of various intelligent well lids is infinite, which is very suitable for the development of the modern intelligent era. However, the three most practical problems of the existing manhole cover are:
1) When vehicle tire pressure well lid was on one side, well lid another side was upwarped easily, and the vehicle pounded the well seat again after through, very easily shakes bad well lid, leads to general well lid life-span extremely low.
2) When raining, the drainage capacity of the well cover opening is not enough, a large amount of water is accumulated on the road surface easily, even urban waterlogging is caused, and great inconvenience is brought to traffic and traveling.
3) When the underground pipeline is full of water and rainstorm occurs, underground water pressure easily washes out the well cover, and serious potential safety hazards are caused to pedestrians.
The intelligent well lid that increases some smart machines on traditional lid formula well lid basis generally can only monitor and report to the police above problem, hardly directly solves practical problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a shock-absorbing flood-discharging and scour-preventing rotary well lid device, which realizes shock absorption of a well lid and prolongs the service life of the well lid; the well seat is provided with a well seat drain hole, so that the flood discharge efficiency is improved; well lid embedding well seat reaches the scour protection and prevents weighing down the effect, prevents that the well lid from being washed out by ponding, causes the potential safety hazard.
The purpose of the invention is realized by the following technical scheme:
The utility model provides a rotatory well lid device of shock attenuation flood discharge scour protection, includes well seat and well lid, the well lid embedding in the well seat, be provided with well seat top baffle and well seat blade groove on the well seat, be provided with the well lid blade on the well lid, the well lid blade with well seat blade groove looks adaptation, the well lid blade still with well seat top baffle is the ripple structure of mutual adaptation, be provided with well seat wash port on the well seat, be provided with the well plunger on the well seat wash port.
Furthermore, the well seat is also provided with a well seat bearing position, and the width of the well seat bearing position is greater than that of the well cover blade.
Further, the well seat is also provided with a well seat side baffle plate used for fixing the position of the well lid.
furthermore, at least 2 well seat drain holes are formed in the well seat.
Further, the well plunger is an automatic control well plunger.
Further, be provided with the well lid outlet on the well lid.
The invention has the beneficial effects that:
(1) The well cover is embedded into the well seat based on the well seat, the well cover, the well inserting rod, the well seat top baffle, the well seat blade groove, the well cover blade, the well seat drain hole and the like, the well seat and the well cover are utilized to jointly bear the external vehicle pressure, and the well seat and the well cover are utilized to be extremely small in gap or completely engaged, so that the vibration of the well cover is reduced; meanwhile, the well cover is embedded into the well seat to prevent the underground water pressure from being too high, and the well cover is directly lifted; by utilizing the well plunger, when no water is accumulated on the road surface, the well plunger is inserted into the drain hole of the well base, and forms a whole with the well lid and the well base to bear pressure together; when water is accumulated on the road surface, the four well inserting rods are drawn out, and the flood is quickly discharged through the drain holes of the well base, so that the pressure of small flood discharge amount of the well cover is relieved. The well plunger is small and portable, and is easy to take out and replace.
(2) The invention has the following functions:
1. The shock absorption function: the well cover is embedded into the well seat, when the wheels press the well cover, the baffle plate on the well seat can prevent the well cover from vibrating, the distance between the baffle plate on the well seat and the well cover blade is reduced, even the baffle plate and the well cover blade are completely matched, the vibration of the well cover can be greatly reduced, and the shock absorption function of the well cover is realized;
2. The flood discharge function: when rainwater is small, the well cover holes can be used for draining water, when surface water is accumulated due to heavy rain or heavy rainstorm, the well inserting rods can be taken out easily, and large-area drainage is carried out by using the drain holes of the well base, so that the flood discharge purpose is achieved;
3. the anti-impact and anti-falling functions are as follows: the well lid is embedded in the well seat, and when groundwater is full and the groundwater pressure is too high, the well lid cannot be directly flushed away unless the well lid is flushed together with the well seat. This with traditional well lid easy to lift, there is the probability of great potential safety hazard to reduce to minimum. The effects of preventing impact and falling are achieved.
(3) The invention has the following advantages: the shock absorption of the well cover is realized, and the service life of the well cover is prolonged; the well seat is provided with a well seat drain hole, so that the flood discharge efficiency is improved; well lid embedding well seat reaches the scour protection and prevents weighing down the effect, prevents that the well lid from being washed out by ponding, causes the potential safety hazard.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an exploded view of a shock absorbing flood discharge anti-scour rotating manhole cover apparatus;
FIG. 2 is a schematic structural view of a four-leaf manhole cover according to a first embodiment;
FIG. 3 is a schematic structural view of a well base in the first embodiment;
FIG. 4 is a schematic view of the structure of the well plug of the present invention;
Fig. 5 is a schematic structural view of the four-leaf manhole cover in the rotating process in the first embodiment;
FIG. 6 is a schematic structural view of a bileaflet well lid in a second embodiment;
fig. 7 is a schematic structural view of a trilobe manhole cover in a third embodiment.
In the figure, 1-well lid, 11-well lid drainage port, 12-well lid blade, 2-well seat, 21-well seat blade groove, 22-well seat bearing position, 23-well seat side baffle, 24-well seat top baffle, 25-well seat drainage hole and 3-well plunger.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following. Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Before describing the embodiments, some necessary terms need to be explained. For example:
If the terms "first," "second," etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element discussed below could also be termed a "second" element without departing from the teachings of the present invention. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.
The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended as limitations of the invention, with the singular being intended to include the plural unless the context clearly dictates otherwise.
When the terms "comprises" and/or "comprising" are used in this specification, these terms are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As shown in fig. 1, a rotatory well lid device of shock attenuation flood discharge scour protection, including well seat 2 and well lid 1, in well lid 1 embedding well seat 2, be provided with well seat top baffle 24 and well seat blade groove 21 on the well seat 2, be provided with well lid blade 12 on the well lid 1, well lid blade 12 and well seat blade groove 21 looks adaptation, well lid blade 12 still is the ripple structure of mutual adaptation with well seat top baffle 24, be provided with well seat wash port 25 on the well seat 2, be provided with well plunger 3 on the well seat wash port 25, be provided with well lid outlet 11 on the well lid 1. The well seat 2 is further provided with a well seat receiving position 22, and the width of the well seat receiving position 22 is larger than that of the well cover blades 12. The well base 2 is also provided with a well base side baffle 23 for fixing the position of the well cover 1. At least 2 well seat drain holes 25 are arranged on the well seat.
Example 1
As shown in fig. 2 to 5, as a preferred embodiment, a person skilled in the art can implement the present invention as a shock-absorbing flood-discharging and erosion-preventing rotary well cover device, which includes a well base 2 and four well covers 1, wherein the well cover 1 is embedded in the well base 2, the well base 2 is provided with a well base top baffle 24 and a well base blade groove 21, the well base 2 is further provided with a well base side baffle 23 for fixing the position of the well cover 1, the well cover 1 is provided with four well cover blades 12, the well cover blades 12 are adapted to the well base blade groove 21, the well base blade groove 21 supports the well cover blades 12 to rotate at a certain angle, and when the well cover blades 12 rotate to the well base side baffle 23, the well base blade groove 21 is adapted to the insertion of the well plugging rod 3. The well lid blade 12 still is the ripple structure of mutual adaptation with well seat top baffle 24, is provided with 4 well seat wash ports 25 on the well seat 2, corresponds on the well seat wash port 25 and is provided with well plunger 3. By utilizing the well inserting rod 3, when no water is accumulated on the road surface, the well inserting rod 3 is inserted into the drain hole 25 of the well base, and forms a whole with the well cover 1 and the well base 2 to bear pressure together; when water is accumulated on the road surface, the four well inserting rods 3 are drawn out, flood is rapidly discharged through the well seat water discharging holes 25, and the pressure of the well lid 1, which is small in flood discharging amount, is relieved. The well plunger 3 is small and portable and is easy to take out and replace.
as shown in fig. 2 and 3, as a preferred embodiment, the well base is further provided with a well base receiving position 22, and the width of the well base receiving position 22 is larger than that of the well lid blade 12. After accepting four well lid blades 12, still accept partial well lid 1 main part, the dispersion atress protects well lid blade 12 to be difficult to by external force destruction.
Further, the well lid 1 is provided with a well lid outlet 11 for flood discharge.
Example 2
As shown in fig. 6, a person skilled in the art can implement the present invention as a shock-absorbing flood-discharging anti-impact rotating well lid device, which includes a well base 2 and two well lids 1, wherein the well lid 1 is embedded in the well base 2, the well base 2 is provided with a well base top baffle 24 and a well base blade groove 21, the well base 2 is further provided with a well base side baffle 23 for fixing the position of the well lid 1, the well lid 1 is provided with two well lid blades 12, the well lid blades 12 are adapted to the well base blade groove 21, the well base blade groove 21 supports the well lid blades 12 to rotate on the well base side baffle 23 by a certain angle, and when the well lid blades 12 rotate to the well base side baffle 23, the well base blade groove 21 is adapted to the insertion of the well plugging rod 3. The well lid blade 12 still is the ripple structure of mutual adaptation with well seat top baffle 24, is provided with 2 well seat wash ports 25 on the well seat 2, corresponds on the well seat wash port 25 and is provided with well plunger 3. By utilizing the well inserting rod 3, when no water is accumulated on the road surface, the well inserting rod 3 is inserted into the drain hole 25 of the well base, and forms a whole with the well cover 1 and the well base 2 to bear pressure together; when water is accumulated on the road surface, the two well inserting rods 3 are drawn out, and the flood is rapidly discharged through the well seat water discharging holes 25, so that the pressure of the well lid 1, which is small in flood discharging amount, is relieved. The well plunger 3 is small and portable and is easy to take out and replace.
example 3
as shown in fig. 7, a person skilled in the art can implement the present invention as a shock-absorbing flood-discharging anti-scour rotating well cover device, which includes a well base 2 and a three-leaf well cover 1, wherein the well cover 1 is embedded in the well base 2, the well base 2 is provided with a well base top baffle 24 and a well base blade groove 21, the well base 2 is further provided with a well base side baffle 23 for fixing the position of the well cover 1, the well cover 1 is provided with three well cover blades 12, the well cover blades 12 are adapted to the well base blade groove 21, the well base blade groove 21 supports the well cover blades 12 to rotate on the well base side baffle 23 by a certain angle, and when the well cover blades 12 rotate to the well base side baffle 23, the well base blade groove 21 is adapted to the insertion of the well plugging. The well lid blade 12 still is the ripple structure of mutual adaptation with well seat top baffle 24, is provided with 3 well seat wash ports 25 on the well seat 2, corresponds on the well seat wash port 25 and is provided with well plunger 3. By utilizing the well inserting rod 3, when no water is accumulated on the road surface, the well inserting rod 3 is inserted into the drain hole 25 of the well base, and forms a whole with the well cover 1 and the well base 2 to bear pressure together; when water is accumulated on the road surface, the four well inserting rods 3 are drawn out, flood is rapidly discharged through the well seat water discharging holes 25, and the pressure of the well lid 1, which is small in flood discharging amount, is relieved. The well plunger 3 is small and portable and is easy to take out and replace.
Example 4
In order to better monitor the water level of the road surface, the well plunger 3 is an automatic control well plunger, and the opening and closing of the well plunger 3 are automatically controlled. A sensor for detecting the water level of the road surface is arranged in the automatic control well insert rod, when the water level value of the road surface exceeds a set fixed value, the automatic control well insert rod is started, and the well seat drain hole 25 starts to quickly discharge the flood; when the water level value of the road surface does not exceed the set fixed value, the well plug is automatically controlled to be closed, and flood discharge is carried out through the well cover water outlet 11.
the shock-absorbing flood discharge scour protection rotating well lid device provided by the invention applies the novel structure of the well lid 1, the well base 2 and the well plug 3, the well lid 1, the well base 2 and the well plug 3 are connected into a whole, the functions of the well base 2 in compression, scour protection and drainage and the functions of the well plug 3 in small size and light weight are fully exerted, and the practical problems are fundamentally solved.
In other technical features in this embodiment, those skilled in the art can flexibly select the technical features according to actual situations to meet different specific actual requirements. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known components, structures or parts are not described in detail in order to avoid obscuring the present invention, and the technical scope of the present invention is defined by the claims.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are used in a generic sense as is understood by those skilled in the art. For example, the components may be fixedly connected, movably connected, integrally connected, or partially connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected inside two elements, and the like, and for those skilled in the art, specific meanings of the above terms in the present invention may be understood according to specific situations, that is, the expression of the language used herein may flexibly correspond to the implementation of the actual technology, and the expression of the language used in the specification (including the drawings) of the present invention does not constitute any single restrictive interpretation of the claims.
Modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, which should be limited only by the appended claims. In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known techniques, such as specific construction details, operating conditions, and other technical conditions, have not been described in detail in order to avoid obscuring the present invention.
Claims (6)
1. The utility model provides a rotatory well lid device of shock attenuation flood discharge scour protection which characterized in that: including well seat (2) and well lid (1), well lid (1) embedding in well seat (2), be provided with well seat top baffle (24) and well seat blade groove (21) on well seat (2), be provided with well lid blade (12) on well lid (1), well lid blade (12) with well seat blade groove (21) looks adaptation, well lid blade (12) still with well seat top baffle (24) are the ripple structure of mutual adaptation, be provided with well seat wash port (25) on well seat (2), be provided with well plunger (3) on well seat wash port (25).
2. The shock-absorbing flood-discharging anti-scouring rotary manhole cover device according to claim 1, wherein: the well seat is also provided with a well seat bearing position (22), and the width of the well seat bearing position (22) is greater than that of the well cover blades (12).
3. The shock-absorbing flood-discharging anti-scouring rotary manhole cover device according to claim 1, wherein: the well seat (2) is also provided with a well seat side baffle (23) for fixing the position of the well cover (1).
4. The shock-absorbing flood-discharging anti-scouring rotary manhole cover device according to claim 1, wherein: the well seat (2) is provided with at least 2 well seat drain holes (25).
5. The shock-absorbing flood-discharging anti-scouring rotary manhole cover device according to claim 1, wherein: the well plunger (3) is an automatic control well plunger.
6. The shock-absorbing flood-discharging anti-scouring rotary manhole cover device according to claim 1, wherein: the manhole cover is characterized in that a manhole cover water outlet (11) is formed in the manhole cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929881.8A CN110578365A (en) | 2019-09-29 | 2019-09-29 | shock attenuation flood discharge scour protection rotatory well lid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929881.8A CN110578365A (en) | 2019-09-29 | 2019-09-29 | shock attenuation flood discharge scour protection rotatory well lid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110578365A true CN110578365A (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910929881.8A Pending CN110578365A (en) | 2019-09-29 | 2019-09-29 | shock attenuation flood discharge scour protection rotatory well lid device |
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| Country | Link |
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| CN (1) | CN110578365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059594A (en) * | 2021-12-31 | 2022-02-18 | 威海泽庭新型建材有限公司 | High-impact-resistance PVC composite resin well lid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203403505U (en) * | 2013-08-23 | 2014-01-22 | 徐俏 | Water draining well device |
| DE202017100539U1 (en) * | 2017-02-01 | 2017-03-02 | Welp und Rösmann GmbH | manhole cover |
| CN208219707U (en) * | 2018-05-23 | 2018-12-11 | 河北建筑工程学院 | A kind of manhole lid device |
| CN208328998U (en) * | 2018-04-09 | 2019-01-04 | 浙江大道建设工程有限公司 | A kind of portable well lid |
| CN109339209A (en) * | 2018-10-18 | 2019-02-15 | 吉林大学 | A kind of intelligent well cover for sewer system and its control method networked |
| CN211080508U (en) * | 2019-09-29 | 2020-07-24 | 湖南小枰建材有限责任公司 | Shock attenuation flood discharge scour protection rotatory well lid device |
-
2019
- 2019-09-29 CN CN201910929881.8A patent/CN110578365A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203403505U (en) * | 2013-08-23 | 2014-01-22 | 徐俏 | Water draining well device |
| DE202017100539U1 (en) * | 2017-02-01 | 2017-03-02 | Welp und Rösmann GmbH | manhole cover |
| CN208328998U (en) * | 2018-04-09 | 2019-01-04 | 浙江大道建设工程有限公司 | A kind of portable well lid |
| CN208219707U (en) * | 2018-05-23 | 2018-12-11 | 河北建筑工程学院 | A kind of manhole lid device |
| CN109339209A (en) * | 2018-10-18 | 2019-02-15 | 吉林大学 | A kind of intelligent well cover for sewer system and its control method networked |
| CN211080508U (en) * | 2019-09-29 | 2020-07-24 | 湖南小枰建材有限责任公司 | Shock attenuation flood discharge scour protection rotatory well lid device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059594A (en) * | 2021-12-31 | 2022-02-18 | 威海泽庭新型建材有限公司 | High-impact-resistance PVC composite resin well lid |
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