CN220319558U - Manual pipe jacking advanced support device - Google Patents
Manual pipe jacking advanced support device Download PDFInfo
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- CN220319558U CN220319558U CN202321911936.0U CN202321911936U CN220319558U CN 220319558 U CN220319558 U CN 220319558U CN 202321911936 U CN202321911936 U CN 202321911936U CN 220319558 U CN220319558 U CN 220319558U
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- 229910000831 Steel Inorganic materials 0.000 claims description 24
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- 235000017491 Bambusa tulda Nutrition 0.000 claims description 13
- 241001330002 Bambuseae Species 0.000 claims description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 13
- 239000011425 bamboo Substances 0.000 claims description 13
- 239000010902 straw Substances 0.000 claims description 13
- 235000013339 cereals Nutrition 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 31
- 230000002787 reinforcement Effects 0.000 abstract description 23
- 230000008093 supporting effect Effects 0.000 description 32
- 239000002689 soil Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 19
- 230000002349 favourable effect Effects 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses an artificial pipe jacking advanced support device which comprises a tool pipe cap and a plurality of support rods, wherein the tool pipe cap is an arc-shaped plate, one end of the tool pipe cap is fixedly connected with the upper part of a first section of pipe jacking of an artificial pipe, a plurality of limit cylinders are fixedly arranged on the inner side wall of the other end of the tool pipe cap, the cylinder openings of the limit cylinders face in the same direction as the jacking direction of the first section of pipe jacking, the limit cylinders are arranged in the same circumferential direction, the number of the support rods is the same as that of the limit cylinders, the support rods penetrate through the limit cylinders, and the support rods can move along the limit cylinders and extend out of the tool pipe cap. The utility model can provide geological reinforcement and support for manual pipe jacking construction facing complex geology, can reduce the damage of the reinforced geology to ground roads, is not limited by pipe jacking distance, and can carry out geological reinforcement according to real-time pipe jacking construction conditions; the operation is simple, the construction time is short, and the overall efficiency of manual pipe jacking construction can be improved.
Description
Technical Field
The utility model relates to the field of underground pipeline construction, in particular to an artificial pipe jacking advanced support device.
Background
The manual pipe jacking is a process of repeatedly cycling prefabricated reinforced concrete pipe joints into the space by manually excavating the space underground and then operating a jack, and the water supply and drainage pipelines and the electric pipelines in the urban road are constructed by adopting a manual pipe jacking process at present, so that the construction of underground pipe networks is completed in a non-excavation mode.
Various geological conditions can be met in the manual pipe jacking construction, wherein geology such as a sand pebble layer or a backfill loose soil layer is quite complex and has great influence on the ground, the soil stability of the layers is poor, when the excavation and the soil discharge operation in the manual pipe jacking construction are carried out, the soil stability is difficult to maintain even if the over-excavation distance is controlled within 20cm, underground collapse is extremely easy to be caused, and a series of accidents such as ground subsidence and even cavity collapse are caused. Therefore, in order to avoid such accidents, the artificial jacking pipe is subjected to geological reinforcement in a geological environment similar to the above conditions, and the geological reinforcement measures adopted at present are as follows: and (5) performing advanced grouting reinforcement on the ground and supporting an advanced pipe shed of a working well.
The ground advanced grouting reinforcement adopts a down-the-hole drill to drill holes on the ground, a grouting valve pipe is arranged in the holes, and cement slurry pressurization and grouting are carried out, so that stratum reinforcement is realized. But the advanced grouting reinforcement of the ground can damage the road surface, and cement paste and sludge generated in construction pollute the road, so the method is not suitable for roads with complicated traffic sections, expressways, highways, political significance and the like.
The working well foreleg shed support adopts a transverse down-the-hole drill to drill the well wall of the working well, a grouting guide pipe is arranged, and the grouting guide pipe is positioned right above the jacking pipe to form an arch-shaped stable reinforcing area. The reinforcing effect of the working well advance pipe shed support is good, but the drilling distance is limited, and the method can only extend about 20 meters, if the distance of the top pipe exceeds 20 meters, the method can not reinforce the stratum beyond the part.
Disclosure of Invention
The utility model aims to solve the problem that in the prior art, ground roads are damaged when geology is reinforced, or the reinforced distance is limited, and full-section geology reinforcement cannot be provided for manual pipe jacking operation with longer construction distance, and provides an artificial pipe jacking advanced support device.
In order to achieve the above object, the present utility model provides the following technical solutions:
the utility model provides an artifical push pipe advance support device, includes instrument pipe cap and a plurality of supporting rod, the instrument pipe cap is the arc, the one end of instrument pipe cap and the upper portion fixed connection of the first section push pipe of artifical push pipe, the inside wall of the other end is fixed to be provided with a plurality of spacing section of thick bamboo, a plurality of spacing section of thick bamboo is arranged in same circumferencial direction, the quantity of supporting rod with spacing section of thick bamboo quantity is the same, the supporting rod passes spacing section of thick bamboo, the supporting rod can be followed spacing section of thick bamboo activity and stretch out the instrument pipe cap.
The utility model relates to an artificial pipe jacking advanced support device, which comprises a tool pipe cap and a plurality of support rods, wherein the tool pipe cap is an arc plate, one end of the tool pipe cap is fixedly connected with the upper part of a first pipe section of an artificial pipe, a plurality of limit cylinders are fixedly arranged on the inner side wall of the other end of the tool pipe cap, cylinder openings of the limit cylinders face to be consistent with the jacking direction of the first pipe section, the number of the support rods is the same as that of the limit cylinders, the support rods pass through the limit cylinders, the support rods can move along the limit cylinders and extend out of the tool pipe cap, jacking is stopped when a complex geological condition is met in pipe jacking construction, the support rods respectively pass through the limit cylinders, the support rods are hammered out of the tool pipe cap and hammer into an unstable soil layer in front in a hammering mode, when all the support rods hammer into the soil layer, the support rods can form an arch support, the tool pipe cap and the limit cylinders pass through the limit cylinders, the support rods can be pulled out of the jack-in a jacking direction, and the condition can not be met when the jack-in operation is repeated, and the jack-in condition can be met when the jack-in advance is carried out; the limiting cylinders are arranged in the same circumferential direction, so that the supporting rod can provide good support for soil digging work. The artificial pipe jacking advanced support device can provide geological reinforcement and support for artificial pipe jacking construction facing complex geology, can reduce the damage of the reinforced geology to ground roads, is not limited by pipe jacking distance, and can perform geological reinforcement according to real-time pipe jacking construction conditions; in addition, the method is simple to operate, short in construction time and capable of improving the overall efficiency of manual pipe jacking construction; according to the utility model, the arch support is formed by manually hammering the support rod, so that the geological condition can be better grasped, the proper support distance is selected according to the geological condition, and more stable guarantee is provided for manual pipe jacking construction.
As a preferable mode of the utility model, the spacing between adjacent limiting cylinders is the same. The spacing between the adjacent spacing section of thick bamboo is the same, and a plurality of spacing section of thick bamboo is even arranges in the same circumferencial direction of instrument pipe cap is favorable to the support pole provides tighter support, can carry out the geological reinforcement better, reduces the risk that leads to ground subsidence because of artifical push pipe.
As a preferable scheme of the utility model, the interval between the adjacent limit cylinders is 3-5cm. The spacing between adjacent spacing cylinders is 3-5cm, and the spacing between adjacent spacing cylinders is in the range, so that the manual pipe jacking advanced support device is favorable for providing tight and good support for common pipe jacking with different diameter sizes.
As a preferable scheme of the utility model, the limit cylinder is a whole section of steel tube sleeve. The steel tube sleeve is used as the limiting cylinder, so that the limiting cylinder is favorable for providing good support for the supporting rod, the risk of deformation of the limiting cylinder when the supporting rod is provided is reduced, and meanwhile, the steel tube sleeve is a common tool on a construction site, so that cost and time are saved.
As a preferable scheme of the utility model, a shielding member is arranged between the adjacent parts of the support rods extending out of the tool pipe cap, and the shielding member is a cereal straw plait. A shielding member is arranged between the parts, extending out of the tool pipe cap, of the adjacent supporting rods, and the shielding member can reduce the situation that soil and slag fall off in gaps between the adjacent supporting rods; the shielding member is a straw plait, the straw plait is soft and easy to bend, the straw plait is easy to fill in the adjacent part of the supporting rod extending out of the tool pipe cap, and the impact on the follow-up jacking pipe is small.
As the preferable scheme of the utility model, the tool pipe cap is a whole semicircular arc-shaped steel plate, and the tool pipe cap is fixedly connected with the upper semicircular area of the head section jacking pipe. The tool pipe cap is a whole arc-shaped steel plate, so that the strength and the rigidity of the tool pipe cap can be ensured, and the risk of breakage and breakage of the tool pipe cap in the jacking process of the jacking pipe is reduced; the tool pipe cap is a semicircular arc steel plate, so that the support rod can provide good support for soil digging work.
As a preferable scheme of the utility model, the thickness of the tool pipe cap is 6-10mm. The thickness of the tool pipe cap is 6-10mm, so that the strength and rigidity of the tool pipe cap can be ensured, and the risk of excessive deformation of the tool pipe cap in the jacking process of the jacking pipe is reduced.
As a preferable scheme of the utility model, the support rod is a whole section of steel drill rod. The support rod is a whole section of steel drill rod, so that the support rod is guaranteed to have enough strength and rigidity, and the risk that the support rod breaks and excessively deforms in the support process to influence the support effect is reduced.
As a preferable scheme of the utility model, the length of the support rod is 50-60cm. The length of the supporting rod is greater than or equal to 50cm, so that enough reinforcement supporting can be provided for complex geology; meanwhile, as the complex geological conditions are mostly loose soil layers, the soil stability is poor, the support rod distance is too long, the reinforcing effect of the artificial pipe-jacking advanced support device can be reduced, and the length of the support rod is smaller than or equal to 60cm, so that the good reinforcing effect can be ensured.
As the preferable scheme of the utility model, the tool pipe cap is welded and connected with the upper part of the first section of the manual pipe, and the limit cylinder is welded and connected with the tool pipe cap. The connection between the components can be ensured to be firm, enough upward supporting force is provided for the supporting rod, and the risk that the components are separated in the use process of the manual pipe jacking advanced supporting device is reduced.
Compared with the prior art, the utility model has the beneficial effects that:
1. the artificial pipe jacking advanced support device can provide geological reinforcement and support for artificial pipe jacking construction facing complex geology; the method is not needed to be carried out on the ground, so that the damage of the geological reinforcement measures to the ground road can be reduced; the utility model is arranged in front of the first-section jacking pipe, can move along with the first-section jacking pipe, and geological reinforcement measures are not limited by the distance of manual jacking pipe construction.
2. The artificial pipe jacking advanced support device can carry out geological reinforcement according to real-time pipe jacking construction conditions, can better grasp geological conditions, selects proper support distances according to the geological conditions, and provides more stable guarantee for artificial pipe jacking construction.
3. The artificial pipe jacking advanced support device is simple to operate, short in construction time and capable of improving the overall efficiency of artificial pipe jacking construction.
Drawings
FIG. 1 is a three-dimensional view of an artificial push pipe advanced support device of the present utility model in operation;
FIG. 2 is a three-dimensional view of an artificial push pipe advanced support device of the present utility model;
FIG. 3 is a front view of an artificial push pipe advanced support device of the present utility model;
fig. 4 is a partial enlarged view of an artificial push pipe advanced support device of the present utility model.
Reference numerals in the drawings: 1-tool pipe cap, 2-supporting rod, 3-limiting cylinder and 4-head section of pipe.
Detailed Description
The present utility model will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present utility model is limited to the following embodiments, and all techniques realized based on the present utility model are within the scope of the present utility model.
Example 1
As shown in fig. 1-4, an artificial pipe jacking advanced support device comprises a tool pipe cap 1 and a plurality of support rods 2, wherein the tool pipe cap 1 is an arc-shaped plate, one end of the tool pipe cap 1 is fixedly connected with the upper part of a first pipe jacking 4 of an artificial pipe jacking, a plurality of limit cylinders 3 are fixedly arranged on the inner side wall of the other end of the tool pipe cap, the limit cylinders 3 are arranged in the same circumferential direction, the number of the support rods 2 is the same as that of the limit cylinders 3, the support rods 2 penetrate through the limit cylinders 3, and the support rods 2 can move along the limit cylinders and stretch out of the tool pipe cap 1.
The utility model discloses an artificial pipe jacking advanced support device, which comprises a tool pipe cap 1 and a plurality of support rods 2, wherein the tool pipe cap 1 is an arc plate, one end of the tool pipe cap 1 is fixedly connected with the upper part of a first pipe jacking 4 of an artificial pipe jacking, a plurality of support cylinders 3 are fixedly arranged on the inner side wall of the other end of the tool pipe cap, cylinder openings of the support cylinders 3 face to be consistent with the jacking direction of the first pipe jacking 4, the number of the support rods 2 is the same as that of the support cylinders 3, the support rods 2 penetrate through the support cylinders 3, the support rods 2 can move along the support cylinders 3 and stretch out of the tool pipe cap 1, jacking is stopped when a complex geological condition is met in construction, the support rods 2 penetrate through the plurality of the support cylinders 3 respectively, the support rods 2 are hammered out of the tool pipe cap 1 in a hammering mode and hammer into an unstable soil layer in front of the soil layer, after all the support rods 2 hammer into the soil layer, the support rods 2 form the arc-shaped support cylinders, the support rods 2 can be pulled out of the support cylinders 2 in the forward direction, and the condition that the support rods can not be pulled out of the support cylinders 2 can be gradually advanced when the support rods 2 are pulled out, and the condition that the support rods can be advanced when the support rods 2 are advanced, and the condition that the support rods can be advanced is met.
It can be appreciated by those skilled in the art that the tool pipe cap 1 is fixed in front of the first section of pipe jacking 4, the length of the tool pipe cap 1 is not easy to be too long, and the tool pipe cap 1 is easy to be excessively deformed in the process of jacking pipe jacking so as to damage the manual pipe jacking advanced support device. Preferably, the tool cap 1 has a length of not more than 60cm.
It can be understood by those skilled in the art that the tool pipe cap 1 is an arc plate, the diameter of the tool pipe cap 1 is selected according to the diameter size of the first-joint jacking pipe 4 in actual construction, and the plurality of limiting cylinders 3 are arranged in the same circumferential direction, so that the support rod 2 can provide good support for the soil digging work.
It will be appreciated by those skilled in the art that the central angle corresponding to the tool pipe cap 1 is not too small, and that the small central angle may reduce the supporting effect of the manual pipe jacking advanced supporting device. Preferably, the tool pipe cap 1 is a semicircular arc plate.
The artificial pipe jacking advanced support device can provide geological reinforcement and support for artificial pipe jacking construction facing complex geology, can reduce the damage of the reinforced geology to ground roads, is not limited by pipe jacking distance, and can perform geological reinforcement according to real-time pipe jacking construction conditions; in addition, the method is simple to operate, short in construction time and capable of improving the overall efficiency of manual pipe jacking construction; according to the utility model, the arch support is formed by manually hammering the support rod 2, so that the geological condition can be better grasped, the proper support distance is selected according to the geological condition, and more stable guarantee is provided for manual pipe jacking construction.
Example 2
As shown in fig. 1 to 4, on the basis of embodiment 1, this embodiment is further optimally designed, specifically, in this embodiment, the intervals between adjacent limiting cylinders 3 are the same, and a plurality of limiting cylinders 3 are uniformly arranged on the same circumferential direction of the tool pipe cap 1, which is favorable for providing tighter support for the support rod 2, so that geological reinforcement can be better performed, and the risk of ground subsidence caused by manual pipe jacking is reduced.
Furthermore, the interval between the adjacent limiting cylinders 3 is 3-5cm, and the interval between the adjacent limiting cylinders 3 is in the range, so that the artificial pipe jacking advanced support device is favorable for providing tight and good support for common pipe jacking with different diameter sizes. Specifically, in this embodiment, the interval between adjacent limiting cylinders 3 is 3cm.
Further, the limiting cylinder 3 is a whole section of steel tube sleeve, the steel tube sleeve is used as the limiting cylinder 3, the limiting cylinder 3 is favorable for providing good support for the supporting rod 2, the risk that the limiting cylinder 3 deforms when providing support is reduced, and meanwhile, the steel tube sleeve is a common tool on a construction site, so that cost and time are saved. Specifically, in this embodiment, the limiting cylinder 3 is a steel tube sleeve with a diameter of 45mm and a length of 10 cm.
Further, the tool pipe cap 1 is a whole semicircular arc steel plate, and the tool pipe cap 1 is fixedly connected with the upper semicircular area of the head section jacking pipe 4. The tool pipe cap 1 is a whole arc-shaped steel plate, so that the strength and the rigidity of the tool pipe cap 1 can be ensured, and the risk of breakage and breakage of the tool pipe cap 1 in the jacking process of a jacking pipe is reduced; the tool pipe cap 1 is a semicircular arc steel plate, and the supporting rod 2 can provide good support for soil digging work.
Further, the thickness of the tool pipe cap 1 is 6-10mm, and the thickness of the tool pipe cap 1 is 6-10mm, so that the strength and rigidity of the tool pipe cap 1 can be ensured, and the risk of excessive deformation of the tool pipe cap 1 in the jacking process of a jacking pipe is reduced. Specifically, in this embodiment, the tool pipe cap is a semicircular arc steel plate with a length of 60cm and a thickness of 10mm.
Further, the supporting rod 2 is a whole section of steel drill rod, so that the supporting rod 2 is guaranteed to have enough strength and rigidity, and the risk that the supporting rod 2 breaks and excessively deforms in the supporting process to further influence the supporting effect is reduced.
It will be appreciated by those skilled in the art that the cross-sectional shape of the support rod 2 has little effect on the support effect, and the support rod 2 may be selected from a variety of steel bars. Specifically, in this embodiment, the support rod 2 is a cylindrical steel drill rod. Alternatively, the support rod 2 may be a hexagonal drill rod.
It will be appreciated by those skilled in the art that the support rod 2 should be able to pass through the spacing cylinder 3, so that the diameter of the support rod 2 in this embodiment is smaller than the diameter of the spacing cylinder 3, but the diameter of the support rod 2 cannot differ too much from the diameter of the spacing cylinder 3, which is detrimental to the support rod 2 provided by the spacing cylinder 3. Specifically, in this embodiment, the supporting rod 2 is a whole section of cylindrical steel drill rod with a diameter of 40 mm.
Further, the length of the support rod 2 is 50-60cm. The length of the supporting rod 2 is greater than or equal to 50cm, so that enough reinforcement supporting can be provided for complex geology; meanwhile, as the complex geological conditions are mostly loose soil layers, the soil stability is poor, the support rod distance is too long, the reinforcing effect of the artificial pipe-jacking advanced support device can be reduced, and the length of the support rod is smaller than or equal to 60cm, so that the good reinforcing effect can be ensured. Specifically, in this embodiment, the supporting rod 2 is a whole section of cylindrical steel drill rod with a diameter of 40mm and a length of 50 cm.
Further, the tool pipe cap 1 is welded with the upper part of the first section pipe 4 of the manual pipe, the limiting cylinder 3 is welded with the tool pipe cap 1, so that the connection between the components can be ensured to be firm, enough upward supporting force is provided for the supporting rod 2, and the risk that the components are separated in the use process of the manual pipe advance support device is reduced.
Example 3
Based on embodiment 1 or 2, this embodiment is further designed in an optimized manner, specifically, in this embodiment, a shielding member is disposed between the portions of the adjacent support rods 2 extending out of the tool pipe cap 1, and the shielding member can reduce the situation that soil and slag fall from gaps between the adjacent support rods 2.
Further, the shielding member is a straw plait, the straw plait is soft and easy to bend, the shielding member is easy to fill in between the parts, extending out of the tool pipe cap, of the adjacent supporting rod 2, and the influence on the follow-up jacking of the jacking pipe is small.
Those skilled in the art will appreciate that the length of the straw plait is generally 20-30cm, which is greater than the gap between the adjacent support rods 2, and the straw plait is soft and easy to bend, and is easy to fill in the support rods 2 above the parts extending out of the tool pipe caps, and is lapped on the two adjacent support rods 2, so that the situation of soil and slag dropping can be better dealt with.
It can be understood by those skilled in the art that the advanced support device of the present utility model is used for geological reinforcement, when the internal environment of the pipe jacking pipe meets the condition of jacking pipe continuously, the pipe jacking pipe can be jacked forward, and the cereal straw plaits are soft and easy to bend, so that the cereal straw plaits can be extruded into the soil layer outside the pipe by the tool pipe cap 1 in the jacking process, the cereal straw plaits are not recycled, and new cereal straw plaits can be stuffed when the next geological reinforcement is performed.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides an artifical push pipe advance support device, its characterized in that, including instrument pipe cap (1) and a plurality of support pole (2), instrument pipe cap (1) is the arc, the one end of instrument pipe cap (1) and the upper portion fixed connection of first section push pipe (4) of artifical push pipe, the inside wall of the other end is fixed to be provided with a plurality of spacing section of thick bamboo (3), the nozzle orientation of spacing section of thick bamboo (3) with the jacking direction of first section of push pipe (4) is unanimous, a plurality of spacing section of thick bamboo (3) are arranged in same circumferencial direction, the quantity of support pole (2) with spacing section of thick bamboo (3) quantity is the same, support pole (2) are passed spacing section of thick bamboo (3), support pole (2) can be followed spacing section of thick bamboo activity and stretch out instrument pipe cap (1).
2. The artificial push pipe advanced support device according to claim 1, wherein the spacing between adjacent limiting cylinders (3) is the same.
3. The artificial push pipe advanced support device according to claim 2, wherein the interval between adjacent limit cylinders (3) is 3-5cm.
4. The artificial push pipe advanced support device according to claim 1, wherein the limiting cylinder (3) is a whole section of steel pipe sleeve.
5. The artificial push pipe advanced support device according to claim 1, wherein a shielding member is arranged between the parts of the adjacent support rods (2) extending out of the tool pipe cap (1), and the shielding member is a cereal straw plait.
6. The artificial push pipe advanced support device according to claim 1, wherein the tool pipe cap (1) is a whole semicircular arc steel plate, and the tool pipe cap (1) is fixedly connected with an upper semicircular area of the head push pipe (4).
7. The artificial push pipe advanced support device according to claim 6, wherein the tool pipe cap (1) has a thickness of 6-10mm.
8. The artificial push pipe advanced support device according to claim 1, wherein the support rod (2) is a whole section of steel drill rod.
9. The artificial push pipe advanced support device according to claim 1, wherein the length of the support rod (2) is 50-60cm.
10. The artificial pipe jacking advanced support device according to claim 1, wherein the tool pipe cap (1) is welded with the upper part of a first section pipe jacking (4) of the artificial pipe jacking, and the limit cylinder (3) is welded with the tool pipe cap (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321911936.0U CN220319558U (en) | 2023-07-18 | 2023-07-18 | Manual pipe jacking advanced support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321911936.0U CN220319558U (en) | 2023-07-18 | 2023-07-18 | Manual pipe jacking advanced support device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319558U true CN220319558U (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321911936.0U Active CN220319558U (en) | 2023-07-18 | 2023-07-18 | Manual pipe jacking advanced support device |
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| Country | Link |
|---|---|
| CN (1) | CN220319558U (en) |
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2023
- 2023-07-18 CN CN202321911936.0U patent/CN220319558U/en active Active
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