CN111276914B - Pipe plug structure of electric power calandria - Google Patents
Pipe plug structure of electric power calandria Download PDFInfo
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- CN111276914B CN111276914B CN202010072824.5A CN202010072824A CN111276914B CN 111276914 B CN111276914 B CN 111276914B CN 202010072824 A CN202010072824 A CN 202010072824A CN 111276914 B CN111276914 B CN 111276914B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
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Abstract
The invention provides a pipe plug structure of a power calandria, which relates to the technical field of power calandria and comprises a pipe plug main body and a fixed connecting rod; the pipe plug comprises a pipe plug body, a pipe plug body and a pipe plug body, wherein four guide sliding grooves are formed in the pipe plug body in a cross surrounding manner, and four extending holes are formed in the outer side of the pipe plug body in a surrounding manner; the rubber sealing rings are arranged at two positions in total, and the two rubber sealing rings are embedded on the outer wall of the pipe plug main body in a surrounding manner; the driving rod is positioned in the pipe plug main body, the driving rod is connected with the quadrilateral adjusting block, and the quadrilateral adjusting block is positioned in the pipe plug main body; according to the pipe plug, the driving rod drives the quadrilateral adjusting block inside the pipe plug main body to rotate, the quadrilateral adjusting block drives the four fixed connecting rods to slide towards the outside of the pipe plug main body when rotating, the reinforcing nails arranged on the outer sides of the fixed connecting rods are inserted into the inner wall of the power calandria, the friction force between the outer wall of the pipe plug main body and the inner wall of the power calandria is increased, and therefore the fixing effect of the pipe plug main body inside the power calandria is guaranteed.
Description
Technical Field
The invention belongs to the technical field of power calandria, and particularly relates to a pipe plug structure of a power calandria.
Background
At present, an urban power line is arranged in a power pipe gallery, some spare empty power pipe racks exist in the power pipe gallery, and in order to ensure the internal cleanness of the power pipe racks, pipe plug structures are generally required to be arranged at pipe orifices at two ends of the spare power pipe racks for blocking, so that the internal sealing cleanness of the power pipe racks is ensured;
the plug structure for the electric power calandria can refer to the patent No. CN104092171B, and mainly comprises a ceramic body, wherein the ceramic body comprises a cylindrical outer edge part and a filling part in a round table shape, the bottom surface with larger area on the filling part is connected to one end surface of the outer edge part in a coplanar manner, the filling part is coaxial with the outer edge part, the area of the bottom surface with larger area on the filling part is smaller than that of the end surface of the outer edge part, the outer edge part and the filling part are provided with through holes along the axis thereof, end cover plates for plugging the through holes along the cross sections thereof are arranged in the through holes, the other end surface of the outer edge part is provided with a stress convex strip which protrudes along the axial direction thereof and surrounds the through holes, the periphery of the stress convex strip corresponds to the periphery of the bottom surface with larger area in; the pipe plug structure for the existing similar electric power calandria is poor in self-fixing effect when in use, the friction force between the pipe plug structure sealed at the position of an electric power calandria pipe orifice and the inner wall of the electric power calandria pipe is small, and the pipe plug structure is easily detached by idle personnel easily to influence the internal sealing effect of the electric power calandria pipe.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pipe plug structure of a power calandria, which aims to solve the problems that when the existing similar pipe plug structure for the power calandria is used, the fixing effect of the pipe plug structure is poor, the friction force between the pipe plug structure sealed at the pipe orifice of the power calandria and the inner wall of the power calandria is small, the pipe plug structure is easily detached by idle personnel, and the sealing effect inside the power calandria is influenced.
The purpose and the effect of the pipe plug structure of the power calandria are achieved by the following specific technical means:
a pipe plug structure of an electric power calandria comprises a pipe plug main body, a rubber sealing ring, a driving rod, a spring and a fixed connecting rod; the pipe plug comprises a pipe plug body, a pipe plug body and a pipe plug body, wherein four guide sliding grooves are formed in the pipe plug body in a cross surrounding manner, and four extending holes are formed in the outer side of the pipe plug body in a surrounding manner; the rubber sealing rings are arranged at two positions in total, and the two rubber sealing rings are embedded on the outer wall of the pipe plug main body in a surrounding manner; the driving rod is positioned in the pipe plug main body, the driving rod is connected with the quadrilateral adjusting block, and the quadrilateral adjusting block is positioned in the pipe plug main body; the springs are arranged at four positions, and the four springs are positioned in the pipe plug main body; the fixed connecting rods are arranged at four positions, the inner parts of the fixed connecting rods are hollow, and the four fixed connecting rods are connected inside the pipe plug main body in a cross sliding mode.
Furthermore, the inside direction spout of stopcock main part is linked together with the outside extension hole of stopcock main part, and fixed link rod outer end sliding connection is in the inside direction spout of stopcock main part to be equipped with many places on the arc terminal surface in the fixed link rod outside and consolidate the nail.
Furthermore, the fixed connecting rods are respectively located in four guide sliding grooves in the pipe plug main body, and the outer ends of the four fixed connecting rods respectively extend to the four ends of the pipe plug main body in a sliding manner.
Furthermore, the driving rod is rotatably connected inside the pipe plug main body, a quadrilateral adjusting block is arranged at the inner end of the driving rod, and the end face of the outer side of the quadrilateral adjusting block is divided into a concave face and a convex face; the inner end of the fixed connecting rod is arc-shaped, and the inner end of the fixed connecting rod is attached to the end face of the outer side of the quadrilateral adjusting block.
Furthermore, the outer side of the driving rod is located outside the pipe plug main body, an inner pentagonal groove is formed in the outer side of the driving rod, and one end of the pentagonal key is slidably inserted into the inner pentagonal groove.
Furthermore, the springs are respectively arranged in four guide sliding grooves formed in the pipe plug main body, and the inner ends of the springs are attached to the inner wall of the fixed connecting rod.
Furthermore, the pipe plug main part is hollow, and the sealing cover is buckled outside the pipe plug main part.
Compared with the prior art, the invention has the following beneficial effects:
1. the fixed connecting rod and the guide sliding groove are arranged, so that the fixed connecting rod in the guide sliding groove can be conveniently adjusted in a sliding manner, the reinforcing nail on the outer side of the fixed connecting rod slides to the outside of the extending hole, the reinforcing nail is inserted into the inner wall of the power calandria, the friction force between the outer wall of the pipe plug main body and the inner wall of the power calandria is increased, and the fixing effect of the pipe plug main body in the power calandria is guaranteed; and the setting of cooperation four fixed link rods can slide the regulation to four fixed link rods, makes four groups consolidate the nail and place respectively on power calandria inner wall all around, further promotes the fastness of power calandria inside stopcock main part connection.
2. The arrangement of the driving rod and the quadrilateral adjusting block is beneficial to driving four fixed connecting rods to move outwards through the quadrilateral adjusting block when the driving rod drives the quadrilateral adjusting block to rotate, the fixed connecting rods are moved and adjusted, when the fixed connecting rods (the outer reinforcing nails are inserted into the inner wall of the power pipe bank, the inner ends of the fixed connecting rods are supported through the quadrilateral adjusting block protrusions, the stress effect of the fixed connecting rods is guaranteed, and the arrangement of the spring is matched, so that when a person rotates the quadrilateral adjusting block again, the concave surfaces of the quadrilateral adjusting blocks are attached to the inner ends of the fixed connecting rods, the fixed connecting rods move inwards under the influence of the thrust of the spring inside the guide sliding groove, and the reinforcing nails at the outer ends of the fixed connecting rods are separated from the inner wall of the power pipe bank, so that the person.
3. The pentagonal key is favorable for being inserted into the driving rod, the driving rod is driven to rotate in the pipe plug main body through the pentagonal key, the rotation adjusting difficulty of the driving rod is increased, and the phenomenon that idle personnel rotate the driving rod at will to detach the pipe plug main body from the pipe orifice of the power pipe bank to influence the sealing effect in the power pipe bank is avoided; and the use of sealed lid is sealed in the cooperation, and the accessible is sealed to inside sealing of stopcock main part, avoids outside grit to get into inside the stopcock main part, influences the driven smoothness nature of each part in the stopcock main part.
Drawings
Fig. 1 is a schematic view of the pipe plug main body and the pentagonal key of the invention.
FIG. 2 is an axial view of the plug body of the present invention;
FIG. 3 is a schematic view of an extended structure of the internal fixed connecting rod of the plug body of the present invention;
FIG. 4 is a schematic view of the internal fixed connecting rod retraction structure of the plug body of the present invention;
FIG. 5 is a schematic view of the mounting shaft of the internal fixed connecting rod of the plug body of the present invention;
FIG. 6 is a schematic view of the driving rod mounting structure inside the plug body of the present invention;
FIG. 7 is a schematic view of the shaft of the active rod of the present invention;
fig. 8 is a schematic view of a fixed connection rod of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a plug body; 101. a guide chute; 102. an extension hole; 2. a rubber seal ring; 3. a driving lever; 301. an inner pentagonal groove; 4. a quadrilateral adjusting block; 5. a spring; 6. a pentagonal key; 7. a fixed connecting rod; 701. reinforcing the nail; 8. and (7) sealing the cover.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 8:
the invention provides a pipe plug structure of a power calandria, which comprises a pipe plug main body 1, a rubber sealing ring 2, a driving rod 3, a spring 5 and a fixed connecting rod 7; the pipe plug main body 1 is hollow, the sealing cover 8 is buckled outside the pipe plug main body 1, the inside of the pipe plug main body 1 can be sealed through the sealing cover 8, and external sand and stones are prevented from entering the inside of the pipe plug main body 1 to influence the transmission fluency of all parts in the pipe plug main body 1; four guide sliding grooves 101 are formed in the pipe plug main body 1 in a cross surrounding manner, and four extending holes 102 are formed in the outer side of the pipe plug main body 1 in a surrounding manner; the rubber sealing rings 2 are arranged at two positions in total, and the two rubber sealing rings 2 are embedded on the outer wall of the pipe plug main body 1 in a surrounding manner; the driving rod 3 is positioned inside the pipe plug main body 1, the driving rod 3 is connected with the quadrilateral adjusting block 4, and the quadrilateral adjusting block 4 is positioned inside the pipe plug main body 1; the outer side of the driving rod 3 is located outside the pipe plug main body 1, an inner pentagonal groove 301 is formed in the outer side of the driving rod 3, one end of a pentagonal key 6 is slidably inserted into the inner pentagonal groove 301, the pentagonal key 6 can be inserted into the driving rod 3, the driving rod 3 is driven by the pentagonal key 6 to rotate inside the pipe plug main body 1, the rotation adjusting difficulty of the driving rod 3 is increased, idle personnel can be prevented from randomly rotating the driving rod 3, the pipe plug main body 1 is detached from the pipe orifice of the power pipe, and the sealing effect inside the power pipe is influenced; the springs 5 are arranged at four positions in total, and the four springs 5 are positioned in the pipe plug main body 1; the fixed connecting rods 7 are arranged at four positions in total, the inner parts of the fixed connecting rods 7 are hollow, and the four fixed connecting rods 7 are connected in the pipe plug main body 1 in a cross-shaped sliding mode.
The pipe plug comprises a pipe plug body 1, a fixed connecting rod 7, a guide chute 101, a plurality of reinforcing nails 701 and a plurality of guide chutes 102, wherein the guide chute 101 in the pipe plug body 1 is communicated with the extension hole 102 on the outer side of the pipe plug body 1, the outer end of the fixed connecting rod 7 is connected in the guide chute 101 in the pipe plug body 1 in a sliding manner, and the arc end face on the outer side of the fixed connecting rod; the concrete effect can carry out slide adjusting to the inside fixed link 7 of direction spout 101, makes the fixed link 7 outside reinforce nail 701 and slide to extending the hole 102 outside, will reinforce nail 701 and insert in electric power calandria inner wall, increases frictional force between 1 outer wall of stopcock main part and the electric power calandria inner wall, the fixed effect of guarantee inside stopcock main part 1 of electric power calandria.
The fixed connecting rods 7 are respectively positioned in four guide sliding chutes 101 in the pipe plug main body 1, and the outer ends of the four fixed connecting rods 7 respectively extend to the outer parts of four ends of the pipe plug main body 1 in a sliding manner; the concrete effect can be to four fixed link 7 slide adjusting, makes four groups strengthen on nail 701 inserts respectively in electric power calandria inner wall all around, further promotes the fastness of electric power calandria inside stopcock main part 1 connection.
The pipe plug comprises a pipe plug main body 1, a driving rod 3, a quadrilateral adjusting block 4, a pipe plug body and a pipe plug, wherein the driving rod 3 is rotatably connected inside the pipe plug main body 1, the inner end of the driving rod 3 is provided with the quadrilateral adjusting block 4, and the end face of the outer side of the quadrilateral adjusting block 4 is divided into a concave face and; the inner end of the fixed connecting rod 7 is arc-shaped, and the inner end of the fixed connecting rod 7 is attached to the end face of the outer side of the quadrilateral adjusting block 4; the concrete effect can drive four fixed connecting rods 7 through quadrangle adjusting block 4 and move to the outside when active rod 3 drives quadrangle adjusting block 4 and rotates, moves the regulation operation to fixed connecting rods 7 to when reinforcing nail 701 inserts in electric power calandria inner wall in the 7 outsides of fixed connecting rods, support fixed connecting rods 7 the inner through quadrangle adjusting block 4 convex surface, guarantee fixed connecting rods 7 atress effect.
Wherein, the springs 5 are respectively arranged in four guide chutes 101 arranged on the pipe plug main body 1, and the inner ends of the springs 5 are attached to the inner wall of the fixed connecting rod 7; the concrete effect can be when personnel rotate quadrangle regulating block 4 once more, and the 4 concave surfaces of quadrangle regulating block laminate mutually with fixed connecting rod 7 inner, and fixed connecting rod 7 is moved to inside by the influence of the inside spring 5 thrust of direction spout 101, and fixed connecting rod 7 outer end reinforcing nail 701 and electric power calandria inner wall phase separation to the personnel take out stopcock main part 1 from the electric power calandria inside.
The specific use mode and function of the embodiment are as follows:
when the electric power drainage pipe is used, a worker firstly inserts one end of the pipe plug main body 1 with the rubber sealing ring 2 into the electric power drainage pipe, so that the rubber sealing ring 2 on the outer side of the pipe plug main body 1 is attached to the inner wall of the electric power drainage pipe, and the interior of the electric power drainage pipe is sealed; next, a worker inserts the pentagonal key 6 into the pentagonal groove 301 in the outer side of the driving rod 3, the driving rod 3 in the pipe plug main body 1 is driven to rotate through the pentagonal groove 301, the quadrilateral adjusting block 4 connected with the driving rod 3 drives four fixed connecting rods 7 to slide outwards respectively, the outer ends of the four fixed connecting rods 7 slide and extend to the outer parts of the four end extending holes 102 of the pipe plug main body 1 respectively, the inner ends of the fixed connecting rods 7 are supported by the convex surfaces of the quadrilateral adjusting block 4, reinforcing nails 701 on the outer side of the fixed connecting rods 7 are inserted into the peripheral inner walls of the power calandria respectively, the friction force between the outer wall of the pipe plug main body 1 and the inner walls of the power calandria is increased, and the fixing effect of the pipe plug main body; next, the worker separates the pentagonal key 6 from the outer side of the pipe plug main body 1, and then the fixed sealing operation of the pipe orifice part of the power calandria can be realized; when needs are dismantled stopcock main part 1, the user drives the inside quadrangle regulating block 4 of stopcock main part 1 and rotates through pentagonal key 6, and 4 concave surfaces of quadrangle regulating block are laminated with the 7 inner of fixed link, and spring 5 drives fixed link 7 and moves to inside, and fixed link 7 outer end reinforcing nail 701 and electric power calandria inner wall phase separation, personnel can dismantle stopcock main part 1 from electric power calandria inside.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (1)
1. The utility model provides a stopcock structure of electric power calandria which characterized in that: comprises a pipe plug main body (1), a rubber sealing ring (2), a driving rod (3), a spring (5) and a fixed connecting rod (7); four guide sliding grooves (101) are formed in the pipe plug main body (1) in a cross surrounding manner, and four extending holes (102) are formed in the outer side of the pipe plug main body (1) in a surrounding manner; the rubber sealing rings (2) are arranged at two positions in total, and the two rubber sealing rings (2) are embedded on the outer wall of the pipe plug main body (1) in a surrounding manner; the driving rod (3) is positioned inside the pipe plug main body (1), the driving rod (3) is connected with the quadrilateral adjusting block (4), and the quadrilateral adjusting block (4) is positioned inside the pipe plug main body (1); the spring (5) is arranged at four positions in total, and the four springs (5) are positioned in the pipe plug main body (1); the fixed connecting rods (7) are arranged at four positions in total, the interiors of the fixed connecting rods (7) are hollow, and the four fixed connecting rods (7) are connected to the interior of the pipe plug main body (1) in a cross-shaped sliding mode;
the pipe plug comprises a pipe plug main body (1), a pipe plug body (1), a guide chute (101) in the pipe plug main body (1), an extension hole (102) on the outer side of the pipe plug main body (1), a fixed connecting rod (7), a plurality of reinforcing nails (701) and a plurality of reinforcing nails, wherein the outer end of the fixed connecting rod (7) is connected in the guide chute (101) in the pipe plug main body (1) in a sliding manner; the fixed connecting rod (7) in the guide sliding groove (101) is adjusted in a sliding mode, so that the reinforcing nail (701) on the outer side of the fixed connecting rod (7) slides to the outside of the extension hole (102), the reinforcing nail (701) is inserted into the inner wall of the power calandria, the friction force between the outer wall of the pipe plug main body (1) and the inner wall of the power calandria is increased, and the fixing effect of the pipe plug main body (1) in the power calandria is guaranteed;
the fixed connecting rods (7) are respectively positioned in four guide sliding grooves (101) in the pipe plug main body (1), and the outer ends of the four fixed connecting rods (7) respectively extend to the outer parts of four ends of the pipe plug main body (1) in a sliding manner;
the driving rod (3) is rotatably connected inside the pipe plug main body (1), a quadrilateral adjusting block (4) is installed at the inner end of the driving rod (3), and the end face of the outer side of the quadrilateral adjusting block (4) is divided into a concave surface and a convex surface; the inner end of the fixed connecting rod (7) is arc-shaped, and the inner end of the fixed connecting rod (7) is attached to the end face of the outer side of the quadrilateral adjusting block (4); when the driving rod (3) drives the quadrilateral adjusting block (4) to rotate, the quadrilateral adjusting block (4) respectively drives four fixed connecting rods (7) to move outwards to move and adjust the fixed connecting rods (7), and when reinforcing nails (701) on the outer sides of the fixed connecting rods (7) are inserted into the inner wall of the power grid, the inner ends of the fixed connecting rods (7) are supported through the convex surfaces of the quadrilateral adjusting block (4), so that the stress effect of the fixed connecting rods (7) is guaranteed;
the outer side of the driving rod (3) is positioned outside the pipe plug main body (1), an inner pentagonal groove (301) is formed in the outer side of the driving rod (3), and one end of a pentagonal key (6) is slidably inserted into the inner pentagonal groove (301);
the springs (5) are respectively arranged in four guide sliding chutes (101) formed in the pipe plug main body (1), and the inner ends of the springs (5) are attached to the inner wall of the fixed connecting rod (7);
the pipe plug main body (1) is hollow, and the sealing cover (8) is buckled outside the pipe plug main body (1);
when the electric power drainage pipe is used, a worker firstly inserts one end of the pipe plug main body (1) with the rubber sealing ring (2) into the electric power drainage pipe, so that the rubber sealing ring (2) on the outer side of the pipe plug main body (1) is attached to the inner wall of the electric power drainage pipe, and the interior of the electric power drainage pipe is sealed; then, a worker inserts a pentagonal key (6) into an inner pentagonal groove (301) on the outer side of a driving rod (3), the inner pentagonal groove (301) drives the driving rod (3) inside a pipe plug main body (1) to rotate, a quadrilateral adjusting block (4) connected with the driving rod (3) drives four fixed connecting rods (7) to slide outwards respectively, the outer ends of the four fixed connecting rods (7) extend to the outer parts of four extending holes (102) of the pipe plug main body (1) in a sliding mode respectively, the inner ends of the fixed connecting rods (7) are supported by the convex surfaces of the quadrilateral adjusting block (4), outer reinforcing nails (701) of the fixed connecting rods (7) are inserted into the peripheral inner walls of an electric power calandria respectively, friction force between the outer wall of the pipe plug main body (1) and the inner wall of the electric power calandria is increased, and the fixing effect of the pipe plug main body (1) inside the electric power; then, the worker separates the pentagonal key (6) from the outer side of the pipe plug main body (1), and the fixed sealing operation of the pipe orifice of the power calandria can be realized; when needs are dismantled to stopcock main part (1), the staff passes through pentagonal key (6) and drives inside quadrangle regulating block (4) of stopcock main part (1) and rotate, and quadrangle regulating block (4) concave surface laminates with fixed connecting rod (7) inner mutually, and spring (5) drive fixed connecting rod (7) and move inside, and fixed connecting rod (7) outer end reinforcement nail (701) and electric power calandria inner wall phase separation, the staff can follow the inside dismantlement of electric power calandria with stopcock main part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072824.5A CN111276914B (en) | 2020-01-21 | 2020-01-21 | Pipe plug structure of electric power calandria |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072824.5A CN111276914B (en) | 2020-01-21 | 2020-01-21 | Pipe plug structure of electric power calandria |
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| Publication Number | Publication Date |
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| CN111276914A CN111276914A (en) | 2020-06-12 |
| CN111276914B true CN111276914B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010072824.5A Active CN111276914B (en) | 2020-01-21 | 2020-01-21 | Pipe plug structure of electric power calandria |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393967Y (en) * | 1999-10-28 | 2000-08-30 | 李建平 | Safety lock for locking manhole cover |
| CN104019323A (en) * | 2014-06-11 | 2014-09-03 | 国家电网公司 | Pressure-resistant duct plug for duct in cable duct bank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9556997B2 (en) * | 2014-04-14 | 2017-01-31 | Oceaneering International, Inc. | Large diameter pipe plug |
-
2020
- 2020-01-21 CN CN202010072824.5A patent/CN111276914B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393967Y (en) * | 1999-10-28 | 2000-08-30 | 李建平 | Safety lock for locking manhole cover |
| CN104019323A (en) * | 2014-06-11 | 2014-09-03 | 国家电网公司 | Pressure-resistant duct plug for duct in cable duct bank |
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| CN111276914A (en) | 2020-06-12 |
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Effective date of registration: 20230308 Address after: 350200 no.4-1, Gongye Road, Luding village, Zhanggang street, Changle District, Fuzhou City, Fujian Province Patentee after: Fujian Yongjiantong Technology Co.,Ltd. Address before: 312400 Beizhang village, Jinting Town, Shengzhou City, Shaoxing City, Zhejiang Province Patentee before: Shaoxing Zhuocheng New Material Co.,Ltd. |
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