CN209907531U - A support for rainwater pipeline construction - Google Patents
A support for rainwater pipeline construction Download PDFInfo
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- CN209907531U CN209907531U CN201920503377.7U CN201920503377U CN209907531U CN 209907531 U CN209907531 U CN 209907531U CN 201920503377 U CN201920503377 U CN 201920503377U CN 209907531 U CN209907531 U CN 209907531U
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- horizontal bar
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- support
- pipeline construction
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000009434 installation Methods 0.000 claims description 15
- 210000001503 joint Anatomy 0.000 abstract description 22
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004587 polysulfide sealant Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model belongs to the support field discloses a support for rainwater pipeline construction, comprising a frame body, the support body is including the arc terminal surface that is located the upper end, the support body is including fixed the frame foot that sets up a plurality of evenly distributed in arc terminal surface below, every the frame foot includes foot and lower foot, go up foot and arc terminal surface fixed connection, lower foot and last foot linear sliding connection, it is used for controlling the gliding adjusting device of lower foot to be equipped with between foot and the lower foot to go up. The prefabricated rainwater pipe is supported in the groove through the frame body, the height of the frame foot is adjusted through the adjusting device to keep the prefabricated rainwater pipe horizontal, and the butt joint precision between the prefabricated rainwater pipe joints is guaranteed.
Description
Technical Field
The utility model relates to a road rainwater pipeline construction method, in particular to support for rainwater pipeline construction.
Background
The drainage design of the road is an important link and an essential element of municipal road construction, and the drainage design is unreasonable, so that serious accumulated water is easily caused. Urban rainwater pipeline construction not only considers the construction quality of construction but also considers the construction progress, and how to improve the construction progress under the condition of ensuring the construction quality. At present, the problem that the work progress of rainwater pipeline exists is: in the operation process, need a plurality of workman to descend the ditch and assist crane low tube operation, not only have the potential safety hazard, it is efficient moreover to the pipe coupling collides each other with the rainwater pipeline under the groove easily, causes the rainwater pipeline damaged.
Chinese patent publication No. CN105113607A discloses a rainwater pipeline structure and a construction method thereof, including prefabricating rainwater pipe joints. The adjacent prefabricated rainwater pipe joints are connected end to end through polysulfide sealant, and cement mortar and a steel wire mesh are coated on the outer side of the joint; the prefabricated rainwater pipe joint is characterized in that a prefabricated support is arranged at the bottom of the prefabricated rainwater pipe joint, the prefabricated support is provided with an arc-shaped contact surface, and cement mortar is arranged on the contact surface of the prefabricated support and the prefabricated rainwater pipe joint. The prefabricated support utilizes a reasonable combination mode of the prefabricated rainwater pipe joint and the prefabricated support, is low in construction cost, convenient to construct, high in construction speed and easy to guarantee construction quality, and further plays a cost-saving effect.
However, in the actual use process, the environmental conditions such as the width depth of the groove and the soil quality are different, so that the four ends of the bottom of the prefabricated support are not in the same plane, the prefabricated support and the pre-branch rainwater pipe joints are inclined, and the accuracy is lower when the pre-branch rainwater pipe joints are butted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a support for rainwater pipeline construction has the level that keeps a rainwater pipe in advance, guarantees the advantage of butt joint precision.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a support for rainwater pipeline construction, includes the support body, the support body is including the arc terminal surface that is located the upper end, the support body is including fixed a plurality of evenly distributed's that set up in arc terminal surface below frame foot, every frame foot includes foot and lower foot, go up foot and arc terminal surface fixed connection, lower foot and last foot linear sliding connection, it is equipped with the gliding adjusting device of foot under being used for controlling to go up between foot and the lower foot.
Through adopting above-mentioned technical scheme, before prefabricated rainwater pipe coupling low tube, the support body is placed in the slot, and the arc terminal surface laminates with prefabricated rainwater pipe coupling outer wall mutually, and the support body supports prefabricated rainwater pipe coupling. The two oppositely arranged frame bodies are arranged in the width direction of the groove, the arc-shaped end surfaces of the two frame bodies are oppositely arranged and form an arc-shaped bearing platform, and the arc-shaped bearing platform is attached to the outer wall of the prefabricated rainwater pipe joint; the groove length direction is provided with two sets of support bodies which are oppositely arranged in parallel, the two sets of support bodies correspond to the two end parts of the prefabricated rainwater pipe joints respectively, and when the pipe is arranged down in the prefabricated rainwater pipe joints, the two sets of support bodies support the two end parts of the prefabricated rainwater pipe joints respectively. An operator can move the upper foot and the lower foot relatively through the adjusting device on the frame foot to adjust the height of the frame foot, so that the height of the corresponding arc-shaped end face is adjusted, the prefabricated rainwater pipe is horizontal, and the butt joint precision between the prefabricated rainwater pipe joints is guaranteed. The prefabricated rainwater pipe is supported in the groove through the frame body, the height of the frame foot is adjusted through the adjusting device to keep the prefabricated rainwater pipe horizontal, and the butt joint precision between the prefabricated rainwater pipe joints is guaranteed.
Furthermore, the adjusting device is a rotary drum, the upper leg and the lower leg are respectively sleeved in the upper end part and the lower end part of the rotary drum, and the rotary drum is rotatably connected to the outer walls of the upper leg and the lower leg through threads.
Through adopting above-mentioned technical scheme, operating personnel rotates the rotary drum, and under the screw thread effect, the rotary drum rotates round last foot and lower foot respectively, changes the position of foot and lower foot in the rotary drum on the change to change the height of frame foot.
Furthermore, a first thread is arranged on the outer wall of the upper foot, a third thread is arranged on the position, opposite to the first thread, of the rotary drum, a second thread is arranged on the outer wall of the lower foot, a fourth thread is arranged on the rotary drum, opposite to the second thread, and the rotating directions of the first thread and the second thread are opposite.
Through adopting above-mentioned technical scheme, screw thread three is opposite with screw thread one direction of rotation, and operating personnel rotates the rotary drum, and screw thread two rotates along screw thread one, and screw thread four rotates along screw thread three, goes up the foot and does opposite or motion in opposite directions simultaneously with lower foot position in the rotary drum, has improved the speed of rotary drum alignment jig foot's height, raises the efficiency.
Furthermore, a spring is arranged in the rotary drum, the upper end of the spring is connected with the lower end of the upper foot, and the lower end of the spring is connected with the upper end of the lower foot.
Through adopting above-mentioned technical scheme, operating personnel rotates the rotary drum, goes up the position of foot and lower foot in the rotary drum and changes, and the spring has reduced the vibrations that the rotary drum rotation produced, has improved the stability of frame foot.
Further, adjusting device includes adjusting bolt, the lower foot sets up to cavity, go up foot sliding connection in the lower foot, it is provided with vertical recess to go up foot one side, adjusting bolt passes the lower foot and contradicts with the bottom of recess.
Through adopting above-mentioned technical scheme, adjusting bolt passes the lower foot and inlay card in the recess bottom for go up the foot and be fixed in the lower foot. When an operator needs to adjust the foot of the stand, the adjusting bolt is rotated, the adjusting bolt is moved out from the bottom of the groove, the upper foot slides in the lower foot, the height of the foot stand is adjusted, and then the adjusting bolt is clamped and embedded in the groove again. The upper foot slides in the lower foot, and the height of the frame foot is adjusted by the mutual matching of the adjusting bolt and the groove.
Further, still include horizontal bar one, the both ends of horizontal bar one are located to the support body, the arc terminal surface includes low limit and the high limit that is parallel to each other, the vertical bracing piece that is provided with of central point department of the lower surface of arc terminal surface, the bracing piece is provided with installation piece one for low limit one side, draw-in groove one has been seted up to installation piece one end, a horizontal bar both ends inlay card respectively in draw-in groove one, mounting groove one has been seted up to the upper surface of horizontal bar one, be provided with spirit level one in the mounting groove one.
Through adopting above-mentioned technical scheme, operating personnel places two support bodies in slot width direction, and the low limit of two support bodies corresponds. The first horizontal bar is placed between the two frame bodies. Two ends of the first horizontal bar are respectively clamped in the first clamping grooves, and then the first level meter is placed in the first clamping grooves of the first horizontal bar. Whether the operator is horizontal between the frame body according to the convenient inspection of spirit level to pass through the height of adjusting device adjusting bracket foot according to the condition, guarantee the level between the frame body. A level gauge assists an operator to observe whether the rack body is horizontal or not.
Further, the rack further comprises a second horizontal bar, the second horizontal bar is perpendicular to the first horizontal bar, the two ends of the second horizontal bar are arranged on the rack body, a second installation block is arranged on the supporting rod and perpendicular to the first installation block, two end portions of the second installation block are provided with second clamping grooves, two ends of the second horizontal bar are respectively clamped and embedded in the second clamping grooves, a second installation groove is formed in the upper surface of the second horizontal bar, and a second level meter is arranged in the second installation groove.
Through adopting above-mentioned technical scheme, operating personnel places two support body levels in slot length direction, is provided with the level bar two between two support bodies, and the two both ends of level bar are blocked respectively and are located in the draw-in groove two of the installation piece two of parallel arrangement's support body, then set up spirit level two in the draw-in groove two of level bar two. An operator can conveniently check whether the two parallel frame bodies are horizontal or not according to the second level gauge, and the two parallel frame bodies are adjusted to be at the same level through the frame feet according to the condition. The second level meter assists operators to observe whether the two parallel frame bodies are horizontal or not.
Furthermore, the upper surface of the arc-shaped end face is provided with a buffer layer.
Through adopting above-mentioned technical scheme, when prefabricated rainwater pipe section low pipe, the buffer layer has avoided the strong collision between prefabricated rainwater pipe and the support body, effectually protects prefabricated rainwater pipe and support body.
To sum up, the utility model discloses following beneficial effect has:
1. through the arrangement of the frame feet, the upper feet, the lower feet and the adjusting device, the prefabricated rainwater pipe is supported in the groove through the frame body, the height of the frame feet is adjusted through the adjusting device to keep the prefabricated rainwater pipe horizontal, and the butting precision between the prefabricated rainwater pipe sections is guaranteed;
2. the first level meter and the second level meter are arranged to assist an operator in keeping the rack horizontal.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of a frame body in embodiment 1;
FIG. 3 is a schematic view showing the inside of a drum in example 1;
FIG. 4 is a schematic view showing a first level gauge and a second level gauge of example 1;
fig. 5 is a schematic view showing the internal structure of a stand bar in embodiment 2.
In the figure, 1, a frame body; 11. an arc-shaped end face; 111. a low edge; 112. high edge; 2. a frame leg; 21. mounting a foot; 211. a first thread; 212. a groove; 22. a step of lowering; 221. a second thread; 23. a rotating drum; 231. a third thread; 232. thread four; 3. a spring; 4. adjusting the bolt; 5. a support bar; 51. a first mounting block 511 and a first clamping groove; 52. a second mounting block; 521. a second clamping groove; 61. a first level meter; 62. a second level meter; 7. a buffer layer; 81. horizontal strips I; 811. a first mounting groove; 82. a second horizontal bar; 821. and a second mounting groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
a support for rainwater pipeline construction, as shown in figure 1, includes four support bodies 1, and operating personnel places four support bodies 1 in the slot. The support body 1 is symmetrically arranged in the groove to form two groups of support bodies 1 which are parallel to each other, and each group of support body 1 comprises two symmetrical support bodies. Two sets of support bodies 1 are located the both ends of prefabricated rainwater pipe coupling respectively and support it in the slot, make things convenient for operating personnel to prefabricated rainwater pipe coupling operation.
As shown in fig. 2, the upper end of each frame 1 includes an arc end surface 11, the arc end surface 11 includes a lower side 111 and a higher side 112 that are parallel to each other, the lower sides 111 of each frame 1 correspond to each other, and each frame 1 forms a support platform and supports a prefabricated rainwater pipe joint. When the prefabricated rainwater pipe joint is located support body 1, arc-shaped end surface 11 and the laminating of prefabricated rainwater pipe joint outer wall, arc-shaped end surface 11 has increased the area of contact of support body 1 with the system rainwater pipe joint, has increased the stability that prefabricated rainwater pipe joint is located support body 1.
As shown in fig. 2, the buffer layer 7 is fixedly arranged on the upper surface of the arc-shaped end surface 11, the buffer layer 7 avoids strong collision between the prefabricated rainwater pipe and the frame body 1, and the prefabricated rainwater pipe and the frame body 1 are effectively protected.
As shown in fig. 2, two cylindrical legs 2 are respectively disposed below two ends of the lower side 111 and the upper side 112, and the four legs 2 are respectively disposed to be inclined toward a center point of the arc-shaped end surface 11. The inclined legs 2 increase the stability of the frame body 1.
As shown in fig. 2, the stand bar 2 includes an upper bar 21 and a lower bar 22, and an adjusting device is provided between the lower end of the upper bar 21 and the upper end of the lower bar 22.
As shown in fig. 2, the adjusting device includes a drum 23, and the upper end and the lower end of the drum 23 are screwed on the outer walls of the upper leg 21 and the lower leg 22, respectively. The operator adjusts the height of the frame leg 2 by rotating the rotating cylinder 23 to adjust the distance between the upper leg 21 and the lower leg 22. When the prefabricated rainwater pipe joints are placed on the frame body 1, an operator can adjust the height of the corresponding frame feet 2 to realize the level of the prefabricated rainwater pipes, and the butt joint precision between the prefabricated rainwater pipe joints is guaranteed.
As shown in FIG. 3, the upper leg 21 and the lower leg 22 are respectively provided with a first right-handed thread 211 and a second left-handed thread 221 with respect to the drum 23, and the inner wall of the drum 23 is provided with a third thread 231 and a fourth thread 232 corresponding to the first thread 211 and the second thread 221 respectively. The operator rotates the rotating cylinder 23 clockwise, the first thread 211 rotates along the third thread 231, and the fourth thread 232 rotates along the second thread 221, so that the upper foot 21 and the lower foot 22 move outwards of the rotating cylinder 23 at the same time at the position of the rotating cylinder 23, the distance between the upper foot 21 and the lower foot 22 increases, and the height of the frame foot 2 increases; the operator rotates the drum 23 counterclockwise so that the upper leg 21 and the lower leg 22 move simultaneously inside the drum 23 at the position of the drum 23, the distance between the upper leg 21 and the lower leg 22 decreases, so that the height of the stand leg 2 is shortened. The operator changes the height of the stand legs 2 by rotating the drum 23 to change the positions of the upper and lower legs 21 and 22 within the drum 23.
As shown in fig. 3, the spring 3 is provided in the drum 23, and the lower end of the upper leg 21 and the upper end of the lower leg 22 are fixedly connected to the upper end and the lower end of the spring 3, respectively. The spring 3 reduces the vibration generated by the rotation of the rotary drum 23 and improves the stability of the frame leg 2.
As shown in fig. 2 and 4, a cylindrical support rod 5 is vertically arranged below the central point of the arc-shaped end surface 11 of the frame body 1, a square mounting block one 51 is fixedly arranged on one side of the support rod 5, which is opposite to the lower edge 111, and a first clamping groove 511 is formed in the upper end of the mounting block one 51. A first level meter 61 is arranged between each group of frame bodies 1, and the first level meters 61 are connected between each group of frame bodies 1 through a first clamping groove 511. A spirit level 61 makes things convenient for operating personnel to check whether two support bodies 1 that set up relatively in the slot are in same level to cooperate frame foot 2 to adjust support body 1 and make two support bodies 1 keep the level.
As shown in fig. 2 and 4, a first horizontal bar 81 is disposed between each group of frame bodies 1, and two ends of the first horizontal bar 81 are respectively inserted into the first slots 511. Mounting groove one 811 has been seted up to the up end of horizontal bar one 81, is provided with spirit level 61 in the mounting groove one, and the setting of horizontal bar one 81 and mounting groove one 811 makes things convenient for the installation of spirit level 61.
As shown in fig. 2 and 4, two sides of the support rod 5 in the length direction of the groove are respectively provided with a second square mounting block 52, the end of the second mounting block 52 is clamped with a second clamping groove 521, and a second level gauge 62 is arranged between the two horizontally arranged frame bodies 1. The second level gauge 62 is connected between the two horizontal rack bodies 1 through a second clamping groove 521. The second level 62 is convenient for an operator to check whether the two horizontal rack bodies 1 are in the same level. The second level gauge 62 is matched with the frame leg 2, so that the two horizontally arranged frame bodies 1 are positioned at the same level, and the joints of the adjacent prefabricated rainwater pipe joints are convenient.
As shown in fig. 2 and 4, a second horizontal bar 82 is disposed between the two horizontal frame bodies 1, and two ends of the second horizontal bar 82 are respectively inserted into the second slots 521. The upper end face of the second horizontal bar 82 is provided with a second mounting groove 821, the second level gauge 62 is arranged in the second mounting groove 821, and the second level gauge 62 and the second mounting groove 821 are arranged to facilitate mounting of the second level gauge 62.
The specific implementation process comprises the following steps: prefabricated rainwater pipe joints are placed in the grooves through four frame bodies 1, and an operator enables the prefabricated rainwater pipes to be horizontal through the heights of the rotating drums 23 and the adjusting frame feet 2, so that the butt joint precision between the prefabricated rainwater pipe joints is guaranteed.
Example 2:
As shown in fig. 5, a vertical groove 212 is formed in one side of the upper leg 21, the adjusting bolt 4 is inserted into the bottom of the groove 212 through the lower leg 22, and the groove 212 and the adjusting bolt 4 are matched with each other, so that the contact area between the adjusting bolt 4 and the upper leg 21 is increased, and the stability between the upper leg 21 and the lower leg 22 is improved.
The specific implementation process comprises the following steps: the operating personnel is fixed in the lower foot 22 through mutually supporting of adjusting bolt 4 and recess 212 on with last foot 21 to slide in the lower foot 22 through last foot 21, realize the altitude mixture control to frame foot 2, realized making prefabricated rainwater tube coupling level to the regulation of frame foot 2 height, guarantee to dock the precision between the prefabricated rainwater tube coupling.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a support for rainwater pipeline construction, includes support body (1), support body (1) is including arc terminal surface (11) that are located the upper end, its characterized in that: support body (1) is including fixed a plurality of evenly distributed's that set up in arc terminal surface (11) below frame foot (2), every frame foot (2) are including last foot (21) and lower foot (22), go up foot (21) and arc terminal surface (11) fixed connection, lower foot (22) and last foot (21) linear sliding connection, it is equipped with the gliding adjusting device of foot (22) under being used for controlling to go up between foot (21) and lower foot (22).
2. The bracket for rainwater pipeline construction according to claim 1, wherein: the adjusting device comprises a rotating cylinder (23), the upper foot (21) and the lower foot (22) are respectively sleeved in the upper end part and the lower end part of the rotating cylinder (23), and the rotating cylinder (23) is rotatably connected to the outer walls of the upper foot (21) and the lower foot (22) through threads.
3. The bracket for rainwater pipeline construction according to claim 2, wherein: the outer wall of the upper foot (21) is provided with a first thread (211), the position of the rotary drum (23) corresponding to the first thread (211) is provided with a third thread (231), the outer wall of the lower foot (22) is provided with a second thread (221), the rotary drum (23) corresponding to the second thread (221) is provided with a fourth thread (232), and the rotating directions of the first thread (211) and the second thread (221) are opposite.
4. A support for rainwater pipeline construction according to claim 3, wherein: a spring (3) is arranged in the rotary drum (23), the upper end of the spring (3) is connected with the lower end of the upper foot (21), and the lower end of the spring (3) is connected with the upper end of the lower foot (22).
5. The bracket for rainwater pipeline construction according to claim 1, wherein: adjusting device includes adjusting bolt (4), lower foot (22) set up to cavity, go up foot (21) sliding connection in lower foot (22), it is provided with vertical recess (212) to go up foot (21) one side, adjusting bolt (4) pass lower foot (22) and contradict with the bottom of recess (212).
6. The bracket for rainwater pipeline construction according to claim 1, wherein: still include horizontal bar (81), the both ends of horizontal bar (81) are located in support body (1), arc terminal surface (11) are including low limit (111) and high limit (112) that are parallel to each other, the central point department of the lower surface of arc terminal surface (11) is vertical to be provided with bracing piece (5), bracing piece (5) are provided with installation piece (51) for low limit (111) one side, draw-in groove (511) have been seted up to installation piece (51) tip, horizontal bar (81) both ends are blocked in draw-in groove (511) respectively, mounting groove (811) have been seted up to the upper surface of horizontal bar (81), be provided with horizontal meter (61) in mounting groove (811).
7. The bracket for rainwater pipeline construction according to claim 6, wherein: still include horizontal bar two (82), horizontal bar two (82) and horizontal bar one (81) mutually perpendicular, the both ends of horizontal bar two (82) are located in support body (1), be provided with installation piece two (52) on bracing piece (5), installation piece two (52) set up with installation piece one (51) is perpendicular, installation piece two (52) tip is provided with draw-in groove two (521), inlay card respectively in draw-in groove two (521) at horizontal bar two (82) both ends, mounting groove two (821) have been seted up to horizontal bar two (82) upper surface, be provided with spirit level two (62) in mounting groove two (821).
8. The bracket for rainwater pipeline construction according to claim 1, wherein: and the upper surface of the arc-shaped end surface (11) is provided with a buffer layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920503377.7U CN209907531U (en) | 2019-04-13 | 2019-04-13 | A support for rainwater pipeline construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920503377.7U CN209907531U (en) | 2019-04-13 | 2019-04-13 | A support for rainwater pipeline construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209907531U true CN209907531U (en) | 2020-01-07 |
Family
ID=69036317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920503377.7U Expired - Fee Related CN209907531U (en) | 2019-04-13 | 2019-04-13 | A support for rainwater pipeline construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209907531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005845A (en) * | 2021-01-29 | 2021-06-22 | 江门明浩电力工程监理有限公司 | Prefabricated ditch and drainage ditch and installation method thereof |
| CN113829298A (en) * | 2021-09-26 | 2021-12-24 | 中国一冶集团有限公司 | Pipe installation part, pipe installation device, system and method |
-
2019
- 2019-04-13 CN CN201920503377.7U patent/CN209907531U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005845A (en) * | 2021-01-29 | 2021-06-22 | 江门明浩电力工程监理有限公司 | Prefabricated ditch and drainage ditch and installation method thereof |
| CN113829298A (en) * | 2021-09-26 | 2021-12-24 | 中国一冶集团有限公司 | Pipe installation part, pipe installation device, system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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