CN112761191A - Hidden municipal administration inspection shaft lid - Google Patents

Hidden municipal administration inspection shaft lid Download PDF

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Publication number
CN112761191A
CN112761191A CN202110068576.1A CN202110068576A CN112761191A CN 112761191 A CN112761191 A CN 112761191A CN 202110068576 A CN202110068576 A CN 202110068576A CN 112761191 A CN112761191 A CN 112761191A
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CN
China
Prior art keywords
hole
opening
well cover
groove
hidden
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.)
Pending
Application number
CN202110068576.1A
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Chinese (zh)
Inventor
管青
连龙
张素琴
张阜海
包智海
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Individual
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110068576.1A priority Critical patent/CN112761191A/en
Publication of CN112761191A publication Critical patent/CN112761191A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • E02D29/1418Covers for manholes or the like; Frames for covers with implements to assist in lifting, e.g. counterweights, springs
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • E02D29/1481Security devices, e.g. indicating unauthorised opening

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The invention provides a hidden municipal inspection well cover, which comprises a ground, an inspection well hole and a well cover hole which are arranged on the ground, and a well cover body matched with the well cover hole, wherein the diameter of the well cover hole is larger than that of the inspection well hole, a long-strip-shaped through hole is formed by penetrating through the well cover body, a long-strip-shaped limiting groove is formed at the bottom of the well cover body, the limiting groove and the through hole are arranged in a crossed manner, the bottom of the limiting groove penetrates through the well cover body, and the top of the limiting groove is positioned in the well cover; a support body located below the passage hole; the opening rod is connected with a long-strip-shaped opening body in a threaded manner, the middle of the opening body is connected with the opening rod, the opening body is perpendicular to the opening rod, the length of the opening body is smaller than that of the through hole and that of the limiting groove, and the length of the opening body is larger than that of the through hole. The hidden municipal inspection well cover provided by the invention can be more convenient to disassemble and assemble.

Description

Hidden municipal administration inspection shaft lid
Technical Field
The invention belongs to the technical field of municipal inspection well covers, and relates to a hidden municipal inspection well cover.
Background
In urban construction there are many underground pipes, such as sewers, underground gas pipes, water pipes, power pipes, communication pipes, defense pipes, etc., which have an outlet to the ground at every other section, the section from the pipe to the ground being called a manhole, which is usually flush with the ground, and therefore a cover is needed to cover the manhole, called a manhole cover.
The inspection well cover is usually made of reinforced cement, metal, reinforced plastic and other materials, and the shape of the inspection well cover mainly takes a round shape and a square shape. Generally, the purpose of the underground pipeline, the management and maintenance unit, the telephone and other information are noted on the inspection well cover.
Disclosure of Invention
The invention aims to provide a hidden municipal inspection well cover, aiming at achieving the purpose of convenient disassembly and assembly.
In order to solve the technical problems, the invention provides a hidden municipal inspection well cover which comprises a ground, an inspection well hole and a well cover hole which are arranged on the ground, and a well cover body matched with the well cover hole, wherein the diameter of the well cover hole is larger than that of the inspection well hole, a long strip-shaped through hole is formed in a way of penetrating through the well cover body, a long strip-shaped limiting groove is formed in the bottom of the well cover body, the limiting groove and the through hole are arranged in a crossed way, the bottom of the limiting groove penetrates through the well cover body, and the top of the limiting groove is positioned in the well cover body;
a support body located below the passage hole;
the opening rod is connected with a long-strip-shaped opening body in a threaded manner, the middle of the opening body is connected with the opening rod, the opening body is perpendicular to the opening rod, the length of the opening body is smaller than that of the through hole and that of the limiting groove, and the length of the opening body is larger than that of the through hole.
The invention is further provided that the through holes are arranged on the well cover body, and the through holes are uniformly distributed on the well cover body.
The invention is further arranged that the limiting groove is perpendicular to the through hole.
The invention is further arranged in such a way that a disc-shaped mass reducing groove is formed in the middle of the bottom of the manhole cover body, and the straight line where the axis of the mass reducing groove is located is collinear with the straight line where the axis of the manhole cover body is located.
The material reducing groove is further provided with a cross-shaped consolidation body, the end parts of the consolidation bodies are connected to the inner wall of the material reducing groove, and the top part of the consolidation body is connected to the top part of the material reducing groove.
The invention is further arranged in that a plurality of placing and taking grooves are vertically arranged on the inner wall of the scenting well hole, the bottom of each placing and taking groove is positioned in the scenting well hole, the top of each placing and taking groove penetrates through the scenting well hole, the supporting body is annular, a plurality of supporting rods are arranged on the outer edge of the supporting body, and the end parts, far away from the supporting body, of the supporting rods are clamped in the placing and taking grooves.
The invention is further arranged that the support bar is inclined and the top of the support bar is connected with the support body.
The invention is further arranged in that the top of the supporting body is provided with an annular anti-skid groove, the axis of the anti-skid groove is collinear with the axis of the supporting body, two sides of the anti-skid groove are both positioned on the supporting body, and the anti-skid groove is positioned right below the through hole.
The anti-skid device is further provided with a horizontal water falling hole arranged on the inner wall of the supporting body, and one end of the water falling hole is communicated with the anti-skid groove.
The bottom end of the opening rod is in a dome shape, the top end of the opening rod is provided with an annular rotating ring, the opening body is provided with a cylindrical opening ring, the opening ring is in threaded connection with the opening rod, the opening rod is provided with a stopping ring, and when the opening ring abuts against the stopping ring, the height difference between the top of the opening body and the bottom of the opening rod is equal to the height difference between the bottom of the well cover body and the bottom of the anti-skid groove.
Compared with the prior art, the hidden municipal inspection well cover provided by the invention has the advantages that when the hidden municipal inspection well cover is used, the well cover body can be just clamped into a well cover hole (the depth of the well cover body is just equal to that of the well cover hole, but the diameter of the well cover body is slightly smaller than that of the well cover hole, so that when one side of the well cover body is tilted, the well cover body can rotate in the well cover hole instead of being clamped, the shape in the attached drawing is only schematic and does not represent an actual structure), the smoothness between the top of the well cover body and the ground can be well kept, vehicles, pedestrians and the like can pass through the well cover body, meanwhile, the edge of the well cover body does not need to be hinged with the ground, and the production cost is reduced. When the well cover body is taken out from the ground, the opening rod and the opening body penetrate through the through hole, after the opening body penetrates through the through hole, the opening rod is rotated to enable the opening body to rotate to the direction of the limiting groove, the opening rod is lifted upwards to enable the opening body to be clamped into the limiting groove, then the opening rod is rotated, the opening body is limited by the limiting groove and cannot rotate in the rotating process of the opening rod, and therefore the opening rod continuously moves downwards and finally butts against the supporting body under the action of threads; the opening rod continues to rotate, and the opening rod cannot continue to move downwards, so that the well lid body is lifted under the action of the opening body, then the operation can be performed in the inspection well hole, and meanwhile, the support body can prevent a worker from falling into the inspection well hole, so that the operation safety is improved.
Drawings
FIG. 1 is a first schematic view of a hidden municipal manhole cover according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram II of an embodiment of the hidden municipal inspection well cover of the invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a cross-sectional view of one embodiment of a concealed municipal inspection well cover of the present invention;
FIG. 5 is a schematic view of an embodiment of a well cover body of the concealed municipal well cover according to the present invention;
FIG. 6 is a schematic view of an embodiment of a ground surface in a concealed municipal manhole cover according to the present invention;
FIG. 7 is a schematic view of an embodiment of a support portion of a concealed municipal manhole cover according to the present invention;
FIG. 8 is a schematic view of an embodiment of an opening rod portion of a concealed municipal inspection well cover according to the present invention.
Wherein, 1, the ground; 2. scenting the well; 3. a well cover hole; 4. a well cover body; 5. through the hole; 6. a limiting groove; 7. a support body; 8. an opening lever; 9. an opening body; 10. a quality reduction tank; 11. consolidation; 12. placing and taking the groove; 13. a support bar; 14. an anti-slip groove; 15. a water falling hole; 16. a rotating ring; 17. opening the ring; 18. the ring is terminated.
Detailed Description
The hidden municipal inspection well cover provided by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.
A hidden municipal manhole cover, as shown in fig. 1 to 8, comprising a ground 1 (i.e. a structure arranged in a road or a road), a manhole hole 2 and a manhole hole 3 which are opened on the ground 1, and a manhole cover body 4 which is matched with the manhole hole 3, wherein the diameter of the manhole hole 3 is larger than that of the manhole shaft 2, a strip-shaped through hole 5 is formed through the manhole cover body 4, a strip-shaped limiting groove 6 is formed at the bottom of the manhole cover body 4, the limiting groove 6 and the through hole 5 are arranged in a cross manner, the bottom of the limiting groove 6 penetrates through the manhole cover body 4, and the top of the limiting groove is positioned in the manhole cover body 4;
a support body 7, said support body 7 being located below said passage hole 5;
the opening rod 8, threaded connection has the opening body 9 of rectangular shape on the opening rod 8, just the middle part of opening the body 9 with the opening rod 8 is connected, open the body 9 with the opening rod 8 is mutually perpendicular, open the length of the body 9 and be less than the length of clearing hole 5 with the length of spacing groove 6, just the length of opening the body 9 is greater than the width of clearing hole 5. The through holes 5 are formed in the well cover body 4, and the through holes 5 are uniformly distributed in the well cover body 4. The limiting groove 6 is perpendicular to the through hole 5.
The middle part of the bottom of the manhole cover body 4 is provided with a disc-shaped quality reducing groove 10, and a straight line where the axis of the quality reducing groove 10 is located is collinear with a straight line where the axis of the manhole cover body 4 is located. Subtract and be provided with criss-cross consolidation 11 in matter groove 10, consolidate 11 tip all connect in subtract the inner wall of matter groove 10, the top connect in subtract the top of matter groove 10.
The inner wall of the inspection well hole 2 is vertically provided with a plurality of placing and taking grooves 12, the bottom of each placing and taking groove 12 is positioned in the inspection well hole 2, the top of each placing and taking groove 12 penetrates through the inspection well hole 2, the supporting body 7 is annular, a plurality of supporting rods 13 are arranged on the outer edge of the supporting body 7, and the end parts, far away from the supporting body 7, of the supporting rods 13 are clamped in the placing and taking grooves 12. The support rod 13 is inclined, and the top of the support rod 13 is connected with the support body 7. The top of the supporting body 7 is provided with an annular anti-skid groove 14, the axis of the anti-skid groove 14 is collinear with the axis of the supporting body 7, two sides of the anti-skid groove 14 are both positioned on the supporting body 7, and the anti-skid groove 14 is positioned right below the through hole 5. The inner wall of the supporting body 7 is provided with a horizontal water falling hole 15, and one end of the water falling hole 15 is communicated with the anti-skid groove 14.
The bottom end of the opening rod 8 is dome-shaped, the top end of the opening rod is provided with an annular rotating ring 16, the opening body 9 is provided with a cylindrical opening ring 17, the opening ring 17 is in threaded connection with the opening rod 8, the opening rod 8 is provided with a stopping ring 18, and when the opening ring 17 abuts against the stopping ring 18, the height difference between the top of the opening body 9 and the bottom of the opening rod 8 is equal to the height difference between the bottom of the well cover body 4 and the bottom of the anti-skid groove 14.
When the hidden municipal inspection well cover is used, the well cover body 4 can be just clamped into the well cover hole 3 (the depth of the well cover body 4 is just equal to that of the well cover hole 3, but the diameter of the well cover body 4 is slightly smaller than that of the well cover hole 3, so that when one side of the well cover body 4 is tilted, the well cover body 4 can rotate in the well cover hole 3 instead of being clamped, the shape in the drawing is only schematic and does not represent an actual structure), and therefore, smoothness between the top of the well cover body 4 and the ground 1 can be well kept, vehicles, pedestrians and the like can conveniently pass through, meanwhile, the edge of the well cover body 4 does not need to be arranged to be hinged with the ground 1, and production cost is reduced. When the well lid body 4 is taken out of the ground 1, firstly, the opening rod 8 and the opening body 9 penetrate through the through hole 5, after the opening body 9 penetrates through the through hole 5, the opening rod 8 is rotated to enable the opening body 9 to rotate to the direction of the limiting groove 6, the opening rod 8 is lifted upwards to enable the opening body 9 to be clamped into the limiting groove 6, then the opening rod 8 is rotated, the opening body 9 is limited by the limiting groove 6 and cannot rotate in the rotating process of the opening rod 8, and therefore the opening rod 8 continuously moves downwards and finally butts against the support body 7 under the action of threads; continue to rotate opening lever 8, because opening lever 8 can not continue downstream, so under the effect of opening body 9 for well lid body 4 is raised, later just can carry out the operation in to inspection shaft hole 2, and supporter 7 can also prevent that the workman from falling into inspection shaft hole 2 simultaneously, has improved the operational safety nature.
The plurality of through holes 5 are opened on the periphery of the well cover body 4, which firstly enables the well cover body 4 to maintain enough structural strength, and simultaneously lightens the mass of the well cover body 4 when in use, thereby saving cost and simultaneously enabling the operation of putting and taking the well cover body 4 to be simpler and more convenient. The same mass reduction hole has also alleviateed the quality of well lid body 4, has reduced the cost, consolidates solid 11 simultaneously and has guaranteed that well lid body 4 possesses sufficient structural strength for its can normal use.
When workers need to enter the inspection well hole 2 or larger equipment needs to be placed in the inspection well hole 2, the support body 7 is directly taken out of the inspection well hole 2 upwards; after the operation is finished, the supporting body 7 is put back into the scenting well hole 2, which is simple and convenient. Wherein the support rod 13 supports the support body 7 obliquely upwards, so that the support rod 13 can well support the support body 7, and the position stability of the support body 7 is ensured.
When the well cover body 4 is lifted, the bottom of the opening rod 8 is positioned in the anti-skid groove 14, and the diameter of the opening rod 8 is smaller than the width of the anti-skid groove 14, so that even if the angle of the opening rod 8 is inclined along with the lifting of the well cover body 4, the bottom of the opening rod 8 can still be normally positioned in the anti-skid groove 14, and meanwhile, the two sides of the opening rod 8 are respectively limited by the inner walls of the anti-skid grooves 14, so that the limiting effect on the opening rod 8 can be continuously maintained.
During use, rainwater on the ground 1 can flow down into the anti-skid groove 14 through the through holes 5, and the water falling holes 15 accelerate the flow of the rainwater, so that the effect of water stains, dirt and the like on the support body 7 is reduced, and the service life of the support body 7 is prolonged. Meanwhile, the bottom of the opening rod 8 is dome-shaped, so that the abrasion between the opening rod 8 and the support body 7 can be reduced, and the service life is prolonged.
In the time of in-service use, at first rotate the opener 9 make on the opening ring 17 contradicts the stop ring 18, then vertically downwards pass opening lever 8 and opener 9 through clearing hole 5, when the bottom of opening lever 8 contradicts the antiskid groove 14 bottom, the top of opener 9 is slightly less than or just contacts the bottom of well lid body 4, only need rotate ninety degrees this moment, just can make opener 9 be located the spacing groove 6 just under, later upwards improve opener 8 and can make opener 9 enter into spacing groove 6 for the operation degree of difficulty is lower.
The opening ring 17 increases the length of the threaded connection with the opening rod 8, can better bear the torque force generated between the opening rod 8 and the opening body 9, prevents the deformation generated when the opening rod 8 is in direct contact with the opening body 9, and prolongs the service life of the opening ring; meanwhile, the termination ring 18 enables a worker to conveniently judge whether the position of the opening body 9 is proper or not, and operation difficulty is reduced. Wherein the opening rod 8 is only used when needed and is not placed on the ground 1 together with the well cover body 4 at ordinary times.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (10)

1. The hidden municipal inspection well cover is characterized by comprising a ground (1), an inspection well hole (2) and a well cover hole (3) which are arranged on the ground (1) and a well cover body (4) which is matched with the well cover hole (3), wherein the diameter of the well cover hole (3) is larger than that of the inspection well hole (2), a long-strip-shaped through hole (5) is formed in the well cover body (4) in a penetrating mode, a long-strip-shaped limiting groove (6) is formed in the bottom of the well cover body (4), the limiting groove (6) and the through hole (5) are arranged in a crossing mode, the bottom of the limiting groove (6) penetrates through the well cover body (4), and the top of the limiting groove is located in the well cover body (4);
a support body (7), said support body (7) being located below said passage hole (5);
opening lever (8), threaded connection has the body (9) of opening of rectangular shape on opening lever (8), just the middle part of opening body (9) with opening lever (8) are connected, open body (9) with opening lever (8) are mutually perpendicular, the length of opening the body (9) is less than the length of clearing hole (5) with the length of spacing groove (6), just the length of opening the body (9) is greater than the width of clearing hole (5).
2. A hidden municipal inspection shaft cover according to claim 1, characterized in that the through holes (5) are opened on the cover body (4) and the through holes (5) are evenly distributed on the cover body (4).
3. A hidden municipal inspection well cover according to claim 1 or 2, characterized in that the limiting groove (6) is perpendicular to the through hole (5).
4. A hidden municipal inspection shaft cover according to claim 3, characterized in that the bottom middle of the cover body (4) is provided with a disc-shaped mass reduction groove (10), and the straight line of the axis of the mass reduction groove (10) is collinear with the straight line of the axis of the cover body (4).
5. A hidden municipal inspection shaft cover according to claim 4, characterized in that a cross-shaped consolidation body (11) is arranged in the matter reduction groove (10), the ends of the consolidation body (11) are connected to the inner wall of the matter reduction groove (10), and the top of the consolidation body is connected to the top of the matter reduction groove (10).
6. The hidden municipal inspection well cover according to claim 1, wherein a plurality of placing and taking grooves (12) are vertically formed in the inner wall of the inspection well (2), the bottom of each placing and taking groove (12) is located in the inspection well (2), the top of each placing and taking groove penetrates through the inspection well (2), the support body (7) is annular, a plurality of support rods (13) are arranged on the outer edge of the support body (7), and the end parts, far away from the support body (7), of the support rods (13) are clamped in the placing and taking grooves (12).
7. A hidden municipal inspection shaft cover according to claim 6, characterized in that the support rods (13) are inclined and the top of the support rods (13) is connected to the support body (7).
8. A hidden municipal inspection shaft cover according to claim 6, characterized in that the top of the support body (7) is provided with an annular anti-slip groove (14), the axis of the anti-slip groove (14) is collinear with the axis of the support body (7), both sides of the anti-slip groove (14) are located on the support body (7), and the anti-slip groove (14) is located right below the passing hole (5).
9. A hidden municipal inspection shaft cover according to claim 8, characterized in that the inner wall of the support body (7) is provided with a horizontal drainage hole (15), and one end of the drainage hole (15) is communicated with the anti-slip groove (14).
10. A hidden municipal inspection shaft cover according to claim 8, characterized in that the bottom end of the opening rod (8) is dome-shaped, the top end is provided with an annular rotating ring (16), the opening body (9) is provided with a cylindrical opening ring (17), the opening ring (17) is in threaded connection with the opening rod (8), the opening rod (8) is provided with a stop ring (18), and when the opening ring (17) abuts against the stop ring (18), the height difference between the top of the opening body (9) and the bottom of the opening rod (8) is equal to the height difference between the bottom of the well cover body (4) and the bottom of the anti-slip groove (14).
CN202110068576.1A 2021-01-19 2021-01-19 Hidden municipal administration inspection shaft lid Pending CN112761191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110068576.1A CN112761191A (en) 2021-01-19 2021-01-19 Hidden municipal administration inspection shaft lid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110068576.1A CN112761191A (en) 2021-01-19 2021-01-19 Hidden municipal administration inspection shaft lid

Publications (1)

Publication Number Publication Date
CN112761191A true CN112761191A (en) 2021-05-07

Family

ID=75703127

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110068576.1A Pending CN112761191A (en) 2021-01-19 2021-01-19 Hidden municipal administration inspection shaft lid

Country Status (1)

Country Link
CN (1) CN112761191A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201000721A (en) * 2008-06-24 2010-01-01 Speedstar Ind Co Ltd Apparatus for adjusting manhole height
TW201037130A (en) * 2009-04-10 2010-10-16 Speedstar Ind Co Ltd Apparatus for adjusting manhole height
CN202116232U (en) * 2011-06-30 2012-01-18 吴朝森 Anti-pinning rescue appliance
CN206368377U (en) * 2016-12-16 2017-08-01 浙江吉天建设有限公司 A kind of municipal well lid with safeguard structure
CN206599797U (en) * 2017-03-30 2017-10-31 郑州高新热力有限责任公司 A kind of heating power well cover opening device of mousing-hook
KR102037973B1 (en) * 2019-04-25 2019-10-29 조흥진 Separating apparatus for manhole cover

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201000721A (en) * 2008-06-24 2010-01-01 Speedstar Ind Co Ltd Apparatus for adjusting manhole height
TW201037130A (en) * 2009-04-10 2010-10-16 Speedstar Ind Co Ltd Apparatus for adjusting manhole height
CN202116232U (en) * 2011-06-30 2012-01-18 吴朝森 Anti-pinning rescue appliance
CN206368377U (en) * 2016-12-16 2017-08-01 浙江吉天建设有限公司 A kind of municipal well lid with safeguard structure
CN206599797U (en) * 2017-03-30 2017-10-31 郑州高新热力有限责任公司 A kind of heating power well cover opening device of mousing-hook
KR102037973B1 (en) * 2019-04-25 2019-10-29 조흥진 Separating apparatus for manhole cover

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Application publication date: 20210507