CN113247842A - A equipment for administrative area demarcation line survey and drawing - Google Patents
A equipment for administrative area demarcation line survey and drawing Download PDFInfo
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- CN113247842A CN113247842A CN202110620549.0A CN202110620549A CN113247842A CN 113247842 A CN113247842 A CN 113247842A CN 202110620549 A CN202110620549 A CN 202110620549A CN 113247842 A CN113247842 A CN 113247842A
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- grabbing
- hinged
- arm
- claw
- motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
- B66F19/005—Lifting devices for manhole covers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to the field of boundary surveying and mapping, in particular to equipment for surveying and mapping administrative demarcation lines, which comprises a vehicle body, a mounting disc, a hoisting device and a grabbing mechanism, wherein the mounting disc is fixedly mounted on the vehicle body, the hoisting device is fixedly connected with the mounting disc, a rotating mechanism is arranged in the mounting disc and can drive the hoisting device to rotate in the horizontal direction, the hoisting device is driven by a hoisting motor to lift and put down the grabbing mechanism, a grabbing column is arranged in the grabbing mechanism, a grabbing claw is arranged in the grabbing column, the grabbing claw extends out when the grabbing column extends into a mounting hole of a well lid to be lifted, so that the well lid is grabbed, and the well lid is hoisted under the action of the hoisting device.
Description
Technical Field
The invention particularly relates to the technical field of boundary surveying and mapping equipment, in particular to equipment for surveying and mapping administrative region boundary lines.
Background
The boundary line of an administrative area refers to the boundary line of administrative areas adjacent to administrative areas approved by national academy or provincial, autonomous and direct governance municipality governments, which has very important significance, when carrying out the surveying and mapping of administrative demarcation lines, people often need to enter the underground work, at this moment, the plugged well lid needs to be lifted to enter the underground, in the current surveying and mapping work, workers usually use tools such as hooks to manually lift the well lid, the working mode has high labor intensity, based on the problem, some equipment for automatically lifting the well lid appears on the market at present, under different working environments, some well lids are not moved all the year round, the edge is rusty and difficult to lift, and some well lid mounting holes are plugged by sundries such as mud and dirt, so that a grabbing mechanism cannot enter the lower part of the well lid, at this moment, people still need to manually handle, resulting in waste of labor.
Accordingly, in order to solve the above problems, the present invention provides an apparatus for political demarcation line mapping.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an equipment for surveying and mapping of administrative area demarcation line, it includes automobile body, mounting disc, hoisting accessory and snatchs the mechanism, wherein, mounting disc fixed mounting is on the automobile body, hoisting accessory and mounting disc fixed connection, be provided with slewing mechanism in the mounting disc, it can drive hoisting accessory and rotate on the horizontal direction, hoisting accessory realizes promoting and putting down snatching the mechanism under the drive that lifts by crane the motor, it is provided with in the mechanism and snatchs the post to snatch, it is provided with in the post and snatchs the claw to snatch, snatch the claw and stretch out when snatching the post and stretch into the mounting hole of treating the promotion well lid, accomplish snatching to the well lid, under hoisting accessory's effect, accomplish lifting by crane to the well lid.
Further, preferably, the grabbing mechanism comprises a grabbing column, an arc-shaped sleeve, a mounting seat and a connecting arm, wherein the arc-shaped sleeve is arranged at the bottom of the grabbing mechanism shell;
the grabbing column is arranged in the arc-shaped sleeve, and the top of the grabbing column is hinged with the connecting arm;
two connecting arms are symmetrically arranged on the axis of the grabbing column and are positioned inside the grabbing mechanism shell;
the mounting seat is fixedly mounted inside the grabbing mechanism shell, is located above the connecting arm and is fixedly connected with the connecting arm.
Further, preferably, the mounting base comprises a base, a turntable and a rotating motor, wherein the base is fixedly mounted inside the grabbing mechanism shell;
the rotating motor is arranged on the base, and the output end of the rotating motor is connected with the turntable through a transmission mechanism;
the rotary table is rotatably arranged on the base, and the rotary motion of the rotary table is controlled by the rotary motor;
the connecting arm is fixedly arranged on the turntable.
Further, as preferred, fixed mounting snatchs the telescopic link in the post of snatching, snatch telescopic link output fixedly connected with and snatch the claw.
Further, preferably, the grabbing claws comprise mounting plates, connecting rods and hook claws, wherein the connecting rods are fixedly arranged on the mounting plates and symmetrically arranged at the front, back, left and right positions of the mounting plates, and the number of the connecting rods is 4;
the mounting plate is fixedly connected with the output end of the grabbing telescopic rod;
the top end of the hook claw is hinged with the bottom end of the connecting rod.
Preferably, a reset telescopic rod, a hinged plate and a spring are arranged at the joint of the inside of the connecting rod and the hook claw, wherein the main body part of the reset telescopic rod is hinged with the connecting rod, and the output end of the reset telescopic rod is hinged with the top of the hinged plate;
the bottom of the hinged plate is hinged with the connecting rod;
the hinged plate is connected with the hook claw through a spring.
Further, preferably, the connecting arm comprises a connecting block, a rear arm, a front arm and a claw part, wherein the connecting block is fixedly arranged on the mounting seat;
the rear arm is fixedly connected with the connecting block;
one of the connecting positions of the rear arm and the front arm of the two connecting arms is provided with a micro motor, the micro motor is fixedly arranged on the rear arm, the output end of the micro motor is connected with the front arm and can control the front arm to rotate, and the front arm of the other connecting arm is hinged with the rear arm;
the top end of the front arm is hinged with the claw part;
the claw part is hinged with the grabbing column.
Further, as preferred, arc cover outward appearance shape is the arc, and it cooperatees with the arc hole of seting up in snatching the mechanism bottom, and it can rotate in the arc hole.
Further, preferably, the lifting device comprises side arms, a lifting motor, a displacement motor, a cable and a cross beam frame, wherein the two side arms are connected through a fixed shaft arranged at the bottom ends of the side arms, and the fixed shaft is fixedly arranged on the mounting disc;
the upper surface of the side wall is slidably provided with a cross beam frame;
the cable is connected with the grabbing mechanism.
Further, preferably, the hoisting motor is fixedly installed on the cross beam frame, and the output end of the hoisting motor controls the winding and the loosening of the bundled cables, so that the grabbing mechanism is lifted and put down;
the displacement motor is fixedly arranged on the beam frame, and the output end of the displacement motor is connected with a gear rack pair to control the sliding of the beam frame on the side wall.
Compared with the prior art, the invention has the beneficial effects that:
compare and mention the well lid in traditional manual work, this equipment provides an automatic well lid promotion scheme, has practiced thrift labour cost, and, consider the well lid edge rust that probably meets when promoting the well lid and die and the problem of mounting hole jam, this equipment uses the linking arm to drive and snatchs the post at vertical in-plane rotation, makes it can sled the dead well lid of rust to adopt the rotating electrical machines to drive and snatch the post rotatory, make and snatch debris such as the dirt that the post can bore and block up its mounting hole.
Drawings
Fig. 1 is a schematic view showing the overall construction of an apparatus for surveying and mapping administrative demarcation lines;
FIG. 2 is a schematic view showing a construction of a lifting device in an apparatus for surveying and mapping administrative demarcation lines;
FIG. 3 is a schematic view showing the internal structure of a grasping mechanism in an apparatus for mapping administrative demarcation lines;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic view showing the internal structure of a connecting rod in an apparatus for mapping administrative demarcation lines;
fig. 6 is a schematic view of a structure at a connecting arm in an apparatus for political demarcation mapping.
In the figure: 1. a vehicle body; 2. mounting a disc; 3. a hoisting device; 4. a grabbing mechanism; 301. a side arm; 302. a hoisting motor; 303. a displacement motor; 304. a rope; 305. a cross beam frame; 401. grabbing the column; 402. an arc-shaped sleeve; 403. a mounting seat; 404. a connecting arm; 4011. grabbing the telescopic rod; 4012. a grabbing claw; 4031. a base; 4032. a turntable; 4033. a rotating electric machine; 4041. connecting blocks; 4042. a rear arm; 4043. a micro motor; 4044. a forearm; 4045. a claw portion; 40121. mounting a plate; 40122. a connecting rod; 40123. hooking claws; 40124. resetting the telescopic rod; 40125. a hinge plate; 40126. a spring.
Detailed Description
The present invention will be described in further detail by way of embodiments with reference to the attached drawings, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present invention.
The utility model provides an equipment for surveying and mapping of administrative district demarcation line, as shown in fig. 1, an equipment for surveying and mapping of administrative district demarcation line, it includes automobile body 1, mounting disc 2, hoisting accessory 3 and grabbing mechanism 4, wherein, 2 fixed mounting of mounting disc on the automobile body 1, hoisting accessory 3 and mounting disc 2 fixed connection, be provided with slewing mechanism in the mounting disc 2, it can drive hoisting accessory 3 and rotate on the horizontal direction, hoisting accessory 3 realizes promoting and putting down grabbing mechanism 4 under the drive of lifting motor 302, be provided with in the grabbing mechanism 4 and grab post 401, be provided with in the grabbing post 401 and grab claw 4012, grab claw 4012 stretches out when grabbing post 401 and stretching into the mounting hole of treating to promote the well lid, accomplishes the snatching of well lid, under hoisting accessory 3's effect, accomplishes lifting by crane to the well lid.
In this embodiment, as shown in fig. 3 and 4, the grabbing mechanism 4 comprises a grabbing column 401, an arc-shaped sleeve 402, a mounting seat 403 and a connecting arm 404, wherein the arc-shaped sleeve 402 is arranged at the bottom of the casing of the grabbing mechanism 4;
the grabbing column 401 is arranged in the arc-shaped sleeve 402, and the top of the grabbing column is hinged with the connecting arm 404;
two connecting arms 404 are symmetrically arranged about the axis of the grabbing column 404, and are located inside the shell of the grabbing mechanism 4;
the mounting seat 403 is fixedly mounted inside the casing of the grabbing mechanism 4, is located above the connecting arm 404, and is fixedly connected with the connecting arm 404;
the mounting seat 403 comprises a base 4031, a turntable 4032 and a rotating motor 4033, wherein the base 4031 is fixedly mounted inside the housing of the gripping mechanism 4;
the rotating motor 4033 is arranged on the base 4031, and the output end of the rotating motor 4033 is connected with the turntable 4032 through a transmission mechanism;
the turntable 4032 is rotatably arranged on the base 4031, and the rotating motion of the turntable is controlled by the rotating motor 4033;
the connecting arm 404 is fixedly mounted on the turntable 4032.
In this embodiment, as shown in fig. 3 and 4, a grabbing telescopic rod 4011 is fixedly installed in the grabbing column 401, and a grabbing claw 4012 is fixedly connected to an output end of the grabbing telescopic rod 4011.
The grabbing claws 4012 comprise mounting plates 40121, connecting rods 40122 and hook claws 40123, wherein the connecting rods 40122 are fixedly arranged on the mounting plates 40121, symmetrically arranged at the front, the back, the left and the right of the mounting plates 40121 and totally provided with 4 connecting rods;
the mounting plate 40121 is fixedly connected with the output end of the grabbing telescopic rod 4011;
the top end of the hook claw 40123 is hinged with the bottom end of the connecting rod 40122.
In this embodiment, as shown in fig. 5, a reset telescopic rod 40124, a hinge plate 40125 and a spring 40126 are arranged at the connection position of the inside of the connecting rod 40122 and the hook claw 40123, wherein the main body part of the reset telescopic rod 40124 is hinged to the connecting rod 40122, and the output end of the reset telescopic rod 40124 is hinged to the top of the hinge plate 40125;
the bottom of the hinge plate 40125 is hinged with a connecting rod 40122;
the hinge plate 40125 is connected to the hook 40123 by a spring 40126.
In this embodiment, as shown in fig. 3 and 6, the connecting arm 404 includes a connecting block 4041, a rear arm 4042, a front arm 4044, and a claw portion 4045, wherein the connecting block 4041 is fixedly mounted on the mounting base 403;
the rear arm 4042 is fixedly connected with the connecting block 4041;
at the joint of the rear arm 4042 and the front arm 4044 of the two connecting arms 404, a micro-motor 4043 is arranged on one of the two connecting arms, the micro-motor 4043 is fixedly mounted on the rear arm 4042, the output end of the micro-motor 4043 is connected with the front arm 4044, the micro-motor can control the rotation of the front arm 4044, and the front arm 4044 of the other connecting arm 404 is hinged with the rear arm 4042;
the top end of the front arm 4044 is hinged with the claw portion 4045;
the claw portion 4045 is hingedly connected to the grasping column 401.
In this embodiment, as shown in fig. 3, the arc sleeve 402 has an arc shape, and is matched with an arc hole formed at the bottom of the grabbing mechanism 4, and can rotate in the arc hole.
In this embodiment, as shown in fig. 2, the lifting device 3 includes a side arm 301, a lifting motor 302, a displacement motor 303, a cable 304 and a cross beam frame 305, wherein the two side arms 301 are connected by a fixed shaft disposed at the bottom end thereof, and the fixed shaft is fixedly mounted on the mounting plate 2;
a cross beam frame 305 is arranged on the upper surface of the side wall 301 in a sliding manner;
the cable 304 is connected to the gripping mechanism 4.
The hoisting motor 302 is fixedly arranged on the beam frame 305, and the output end of the hoisting motor controls the winding and the releasing of the bundled cables 304, so that the grabbing mechanism 4 is lifted and put down;
the displacement motor 303 is fixedly mounted on the cross beam 305, and the output end of the displacement motor is connected with a rack and pinion to control the sliding of the cross beam 305 on the side wall 301.
Specifically, when the equipment works, the lifting device 3 and the grabbing mechanism 4 are carried by the vehicle body 1 and run to the well lid to be grabbed, the position of the grabbing column 401 in the grabbing mechanism 4 is controlled through the rotation of the mounting disc 2 and the sliding of the cross beam frame 305 to be aligned with the position of the mounting hole on the well lid, the grabbing column 401 is extended into the mounting hole under the control of the lifting crane 302, then the grabbing telescopic rod 4011 in the grabbing column 401 pushes the grabbing claw 4012 out of the grabbing column, at the moment, the hook claw 40123 rotates around a hinge point under the action of gravity, the grabbing range of the hook claw is larger than the aperture of the well lid mounting hole, the well lid is lifted under the action of the lifting device 3, when the well lid needs to be put down, the resetting telescopic rod 40124 in the connecting rod 40122 retracts inwards, the hook claw 40123 rotates inwards, the grabbing telescopic rod 4011 retracts into the grabbing column under the action of the telescopic rod 4011, and then the resetting telescopic rod 40124 restores to the original length, the reset is completed.
In addition, when the manhole cover is rusted due to reasons such as overlong placement time and the like and is difficult to lift, the grabbing column 401 can rotate in a vertical plane under the action of the connecting arm 404 and the arc-shaped sleeve 402, so that the rusted manhole cover is pried, the upper part of the grabbing column 401 is in contact with the manhole cover when the grabbing column pries the manhole cover, the inner wall thickness of the grabbing column is more than 11mm according to different materials, and the grabbing column 401 is prevented from being broken in the priing process. When the mounting hole of the well lid is blocked by impurities such as mud, the grabbing column 401 can rotate under the driving of the rotating motor 4033 to drill the blocked mud.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the equivalent alternatives according to the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides an equipment for surveying and mapping of administrative area demarcation line, its includes automobile body (1), mounting disc (2), hoisting accessory (3) and snatchs mechanism (4), wherein, mounting disc (2) fixed mounting is on automobile body (1), hoisting accessory (3) and mounting disc (2) fixed connection, its characterized in that:
a rotating mechanism is arranged in the mounting disc (2) and can drive the lifting device (3) to rotate in the horizontal direction;
the lifting device (3) is driven by a lifting motor (302) to lift and put down the grabbing mechanism (4);
snatch and be provided with in the mechanism (4) and snatch post (401), it snatchs claw (4012) to be provided with in post (401) to snatch, snatch claw (4012) and stretch out when snatching post (401) and stretch into the mounting hole of treating to promote the well lid, accomplish snatching of well lid, under the effect of hoisting accessory (3), accomplish lifting by crane to the well lid.
2. A device for political demarcation line mapping according to claim 1, wherein the gripping mechanism (4) comprises a gripping post (401), an arc-shaped sleeve (402), a mounting seat (403) and a connecting arm (404), wherein the arc-shaped sleeve (402) is arranged at the bottom of the gripping mechanism (4) housing;
the grabbing column (401) is arranged in the arc-shaped sleeve (402), and the top of the grabbing column is hinged with the connecting arm (404);
the two connecting arms (404) are symmetrically arranged about the axis of the grabbing column (404) and are positioned inside the shell of the grabbing mechanism (4);
the mounting seat (403) is fixedly mounted inside a shell of the grabbing mechanism (4), is positioned above the connecting arm (404), and is fixedly connected with the connecting arm (404).
3. An apparatus for political demarcation line mapping according to claim 2, wherein the mounting seat (403) comprises a base (4031), a turntable (4032) and a rotary motor (4033), wherein the base (4031) is fixedly mounted inside a gripping mechanism (4) housing;
the rotating motor (4033) is arranged on the base (4031), and the output end of the rotating motor is connected with the turntable (4032) through a transmission mechanism;
the turntable (4032) is rotatably arranged on the base (4031), and the rotating motion of the turntable is controlled by the rotating motor (4033);
the connecting arm (404) is fixedly arranged on the turntable (4032).
4. The equipment for surveying and mapping administrative regions according to claim 2, wherein a grabbing telescopic rod (4011) is fixedly installed in the grabbing column (401), and a grabbing claw (4012) is fixedly connected to an output end of the grabbing telescopic rod (4011).
5. The apparatus for political demarcation line surveying and mapping according to claim 4, wherein the grabbing claw (4012) comprises a mounting plate (40121), a connecting rod (40122) and a hook claw (40123), wherein the connecting rod (40122) is fixedly arranged on the mounting plate (40121) and symmetrically arranged at the front, back, left and right positions of the mounting plate (40121), and the number of the connecting rod is 4;
the mounting plate (40121) is fixedly connected with the output end of the grabbing telescopic rod (4011);
the top end of the hook claw (40123) is hinged with the bottom end of the connecting rod (40122).
6. The equipment for political demarcation surveying and mapping according to claim 5, characterized in that a reset telescopic rod (40124), a hinged plate (40125) and a spring (40126) are arranged at the connection position of the inside of the connecting rod (40122) and the hook claw (40123), wherein the main body part of the reset telescopic rod (40124) is hinged with the connecting rod (40122), and the output end of the reset telescopic rod is hinged with the top of the hinged plate (40125);
the bottom of the hinged plate (40125) is hinged with a connecting rod (40122);
the hinged plate (40125) is connected with the hook claw (40123) through a spring (40126).
7. An apparatus for political demarcation mapping according to claim 2, wherein the connecting arm (404) comprises a connecting block (4041), a rear arm (4042), a front arm (4044) and a claw portion (4045), wherein the connecting block (4041) is fixedly mounted on a mounting block (403);
the rear arm (4042) is fixedly connected with the connecting block (4041);
one of the connecting parts of the rear arms (4042) and the front arms (4044) of the two connecting arms (404) is provided with a micro motor (4043), the micro motor (4043) is fixedly installed on the rear arm (4042), the output end of the micro motor is connected with the front arm (4044) and can control the front arm (4044) to rotate, and the front arm (4044) of the other connecting arm (404) is hinged with the rear arm (4042);
the top end of the front arm (4044) is hinged with the claw part (4045);
the claw part (4045) is hinged with the grabbing column (401).
8. A device for the mapping of lines of political demarcation according to claim 2, characterized in that the arc-shaped sleeve (402) has an arc-shaped external shape, which cooperates with an arc-shaped hole provided at the bottom of the gripping means (4), in which it can rotate.
9. An apparatus for political demarcation line mapping according to claim 1, wherein the lifting device (3) comprises side arms (301), a lifting motor (302), a displacement motor (303), a cable (304) and a cross-beam frame (305), wherein the two side arms (301) are connected by a fixed shaft arranged at the bottom ends thereof, and the fixed shaft is fixedly mounted on the mounting plate (2);
a cross beam frame (305) is arranged on the upper surface of the side wall (301) in a sliding manner;
the cable (304) is connected with the grabbing mechanism (4).
10. An apparatus for political demarcation line mapping according to claim 9, wherein the hoisting motor (302) is fixedly mounted on a beam frame (305), the output end of which controls the winding and unwinding of the bundle of cables (304) to achieve the lifting and lowering of the gripping mechanism (4);
the displacement motor (303) is fixedly arranged on the cross beam frame (305), and the output end of the displacement motor is connected with a gear-rack pair to control the sliding of the cross beam frame (305) on the side wall (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620549.0A CN113247842A (en) | 2021-06-03 | 2021-06-03 | A equipment for administrative area demarcation line survey and drawing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620549.0A CN113247842A (en) | 2021-06-03 | 2021-06-03 | A equipment for administrative area demarcation line survey and drawing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113247842A true CN113247842A (en) | 2021-08-13 |
Family
ID=77186168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110620549.0A Withdrawn CN113247842A (en) | 2021-06-03 | 2021-06-03 | A equipment for administrative area demarcation line survey and drawing |
Country Status (1)
| Country | Link |
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| CN (1) | CN113247842A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20206078U1 (en) * | 2002-01-26 | 2002-08-08 | Beck Andre | All-purpose lid lifter for manhole and manhole covers or the like. |
| CN207498016U (en) * | 2017-09-25 | 2018-06-15 | 厦门市特种设备检验检测院 | A kind of gas valve well cover opener |
| CN110182734A (en) * | 2019-05-14 | 2019-08-30 | 刘加仪 | A kind of well lid lifts device |
| KR102028897B1 (en) * | 2018-04-30 | 2019-10-07 | 한전케이피에스 주식회사 | Manhole cover lifter |
| CN110371900A (en) * | 2019-08-02 | 2019-10-25 | 绍兴欢歌智能科技有限公司 | A kind of road construction well cover opening device |
| CN112062003A (en) * | 2020-09-15 | 2020-12-11 | 孙国花 | Municipal administration public facilities is maintained and is covered device with inspection shaft lid |
| CN212222369U (en) * | 2020-04-13 | 2020-12-25 | 刘杨 | A device for administrative area demarcation line survey and drawing |
-
2021
- 2021-06-03 CN CN202110620549.0A patent/CN113247842A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20206078U1 (en) * | 2002-01-26 | 2002-08-08 | Beck Andre | All-purpose lid lifter for manhole and manhole covers or the like. |
| CN207498016U (en) * | 2017-09-25 | 2018-06-15 | 厦门市特种设备检验检测院 | A kind of gas valve well cover opener |
| KR102028897B1 (en) * | 2018-04-30 | 2019-10-07 | 한전케이피에스 주식회사 | Manhole cover lifter |
| CN110182734A (en) * | 2019-05-14 | 2019-08-30 | 刘加仪 | A kind of well lid lifts device |
| CN110371900A (en) * | 2019-08-02 | 2019-10-25 | 绍兴欢歌智能科技有限公司 | A kind of road construction well cover opening device |
| CN212222369U (en) * | 2020-04-13 | 2020-12-25 | 刘杨 | A device for administrative area demarcation line survey and drawing |
| CN112062003A (en) * | 2020-09-15 | 2020-12-11 | 孙国花 | Municipal administration public facilities is maintained and is covered device with inspection shaft lid |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210813 |