CN217267577U - Recoverable precipitation well tubular construction and mounting structure thereof - Google Patents
Recoverable precipitation well tubular construction and mounting structure thereof Download PDFInfo
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- CN217267577U CN217267577U CN202220786207.6U CN202220786207U CN217267577U CN 217267577 U CN217267577 U CN 217267577U CN 202220786207 U CN202220786207 U CN 202220786207U CN 217267577 U CN217267577 U CN 217267577U
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Abstract
The utility model provides a recoverable precipitation well tubular construction and mounting structure thereof belongs to construction technical field. The technical scheme is as follows: the pipe joint comprises a pipe section I and a pipe section II, wherein the pipe section I is formed by splicing two semicircular rings, and the adjacent pipe sections I are connected with an annular piece through threaded connection; the outer side of the upper end of the pipe section II is provided with a convex circular ring I, the convex circular ring I is connected with the pipe section I through threads, and the lower end of the pipe section II can be arranged in the convex circular ring I through threads; the pipe fitting is characterized by further comprising a pipe section III and an annular bottom support, wherein a convex circular ring II is arranged on the outer side of the upper end of the pipe section III, the convex circular ring II is connected with the pipe section II on the lowest layer through threads, the annular bottom support is arranged below the pipe section III through threads, and the lower part of the pipe section III and the lower part of the annular bottom support are sealed; a plurality of filter holes are formed in the side wall of the second pipe section, the side wall of the third pipe section and the sealing end of the third pipe section; and the outer wall of the third pipe section is provided with a plurality of lifting lugs. The beneficial effects of the utility model are that: the well tubular structure may be recovered.
Description
Technical Field
The utility model relates to a construction technical field especially relates to a recoverable precipitation well tubular construction and mounting structure thereof.
Background
Before the deep foundation pit is excavated, the size and the depth of a precipitation well are designed and constructed according to geological exploration conditions, and the earth excavation operation in the pit is started after precipitation is required to reach 1m below the designed foundation pit. In the early stage of foundation pit engineering, precipitation is particularly important. At present, after the construction of a precipitation well is completed, precipitation construction in a pit is carried out in a mode of removing pipe joints while excavating, and the pipe joints are generally made of coarse aggregate concrete. The following problems exist in performing the removal of the pipe sections: the material is wasted, and the pipe joint is directly broken; the broken pipe joint material is easy to hang into the pipe to block the water pump; the collision in the transportation and installation process leads to incomplete edges and corners, and the edges and corners are influenced by external force and the installation segments are not normally staggered up and down, so that soil leaks into the well and blocks the water suction pump.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a recoverable precipitation well tubular construction and mounting structure thereof.
The utility model discloses a realize through following measure: the well pipe structure of the recoverable dewatering well is characterized by comprising a plurality of pipe sections I and pipe sections II, wherein external threads are arranged at two ends of each pipe section I, each pipe section I is formed by splicing two semicircular rings, and two adjacent pipe sections I are connected with an annular piece through threaded connection;
a first convex ring is arranged on the outer side of the upper end of the second pipe section, the first convex ring is connected with the first pipe section at the lowest layer through threads, the first pipe section is positioned inside the first convex ring, and the lower end of the second pipe section can be arranged in the first convex ring through threads;
the pipe fitting is characterized by further comprising a pipe section III and an annular bottom support arranged below the pipe section III, wherein a convex circular ring II is arranged on the outer side of the upper end of the pipe section III, the convex circular ring II is connected with the pipe section II at the lowest layer through threads, the pipe section II is located inside the convex circular ring II, the annular bottom support is arranged below the pipe section III through threads, the lower part of the pipe section III and the lower part of the annular bottom support are sealed, and a gap is formed between the lower surface of the pipe section III and the inner bottom surface of the annular bottom support;
a plurality of filter holes are formed in the side wall of the second pipe section, the side wall of the third pipe section and the sealing end of the third pipe section;
a plurality of lifting lugs are uniformly distributed on the outer wall of the pipe section III in the circumferential direction;
the first pipe section, the second pipe section, the third pipe section and the annular bottom support are all made of steel.
The sealed end of the second pipe section is used for supporting the water suction pump, and the interval between the sealed end and the annular bottom support can be used for depositing mud, so that the water suction pump is prevented from being blocked by mud entering from the upper end of a well head.
The middle position of the opening end of one semicircular ring is provided with a slot, and the middle position of the opening end of the other semicircular ring is provided with an insertion block inserted in the slot.
The utility model provides a mounting structure for recoverable precipitation well tubular structure includes construction platform, the last round hole that the internal diameter is greater than precipitation well internal diameter that is provided with of construction platform, construction platform is last and to be located the outside of round hole is provided with annular boss, be provided with opening convex groove up on the annular boss, convex inslot internal rotation be provided with convex groove complex annular slab, the symmetry is provided with the support on the annular slab, two be provided with the centre gripping between the support the clamping structure of pipeline section one.
The centre gripping structure is including connecting two the dead lever of support and rotation setting are two-way screw rod between the support, two-way screw rod and dead lever all are located the outside of round hole, two-way screw rod's both ends all are provided with the grip block through threaded connection, the grip block cup joints on the dead lever, two the symmetry is provided with two archs on the opposite face of grip block, be provided with the U type groove of lining up from top to bottom in the arch, just be located on the lower part outer wall of pipeline section one the top of threaded connection department be provided with U type groove complex cylinder, the cylinder can insert U type inslot, two-way screw rod passes through power unit drive. The power mechanism can be a motor with a speed reducer or a hand wheel.
And universal wheels in contact with the upper end face of the construction platform are arranged on the two supports. Therefore, the bracket can be conveniently rotated, the labor is saved, and the mounting efficiency is improved.
And a gap is reserved between the outer wall of the column body and the inner wall of the U-shaped groove. Therefore, fine adjustment can be conveniently realized in the butt joint process of the first pipe section.
An arc-shaped part matched with the outer wall of the first pipe section is arranged between the two bulges, and the inner diameter of the arc-shaped part is slightly larger than or equal to the outer diameter of the first pipe section.
Two just be located on the support the below of grip block is provided with two openings, still including sliding the setting two U type pole in the opening, be provided with the spacing ring on the outer wall of loop forming element, two tip of U type pole can insert the below of spacing ring, the spacing ring overlap joint is in on the U type pole.
A construction method of a recoverable dewatering well pipe structure is characterized by comprising the following specific steps:
s1, pouring crushed stones with the thickness of 50cm into the precipitation well to serve as crushed stone cushions; (convenient later placing ring collet)
S2, setting up a construction platform, enabling the circular hole on the construction platform to coincide with the circle center of the dewatering well, leveling and fixing;
s3, connecting the annular bottom support with the pipe section by three threads, and placing the pipe section into a precipitation well through hoisting equipment;
s4, when only the convex circular ring II of the residual pipe section III is exposed out of the dewatering well, stopping the hoisting equipment, manually installing a section of pipe section II, and then starting the pipe laying by the hoisting equipment;
s5, when only the first convex ring of the second residual pipe section is exposed out of the dewatering well, stopping the hoisting equipment, manually installing the second pipe section II, and then starting the pipe laying by the hoisting equipment;
s6, repeating the step S5 according to the height of the water level, stopping the hoisting equipment when the convex circular ring I of the last section of the first pipe section II is exposed out of the dewatering well, and installing the first pipe section; the first pipe section is located above the water level.
S7, rotating the bidirectional screw, adjusting the positions of the two clamping plates to enable the two semicircular rings to be placed at the positions of the clamping plates and the open ends of the two semicircular rings to be opposite, then rotating the bidirectional screw to enable the insert block to enter the slot, simultaneously inserting the U-shaped groove into the column body, and installing the annular piece above the first pipe section; the first pipe section is basically concentric with the second pipe section under the limitation of the U-shaped groove and the clamping plate, and fine adjustment can be realized due to the clearance between the U-shaped groove and the column body.
S8, rotating the support, driving the first pipe section to rotate by the U-shaped groove, enabling the first pipe section to enter the first convex circular ring, and starting a lower pipe by the hoisting equipment; the U-shaped groove is inserted with the column body on the first pipe section and is communicated up and down, so that the downward movement of the first pipe section in the rotating process is not influenced, and the threaded connection of the first pipe section is realized;
s9, when only the ring-shaped elements are exposed out of the dewatering well, stopping the hoisting equipment, repeating S7 to install the first second pipe section, and starting the pipe laying by the hoisting equipment;
s10, installing the residual first pipe section according to the depth of the foundation pit;
and S11, filling gravel around the pipe joints after pipe descending is finished. Therefore, the pipeline can be integrally lifted in the later stage, graded broken stones are generally selected, the particle size of the broken stones is larger than the aperture of the filtering hole, the broken stones are prevented from entering a well pipe, the filling thickness is 10cm, and the filtering effect is achieved. And finally, cleaning the pipeline, and installing a water pumping pump and a water pumping pipe.
After the hoisting equipment stops, the U-shaped rod is inserted into the through hole, and the limiting ring or the convex ring II or the convex ring I can be lapped on the U-shaped rod. Can inject the pipeline in precipitation wellhead through U type pole like this, avoid lifting by crane equipment trouble or maloperation, cause the pipeline whereabouts, security when improving the pipe section butt joint. The hoisting equipment generally adopts a truck-mounted crane.
Lifting lugs can also be arranged on the outer walls of the first pipe section and the second pipe section.
Compared with the prior art, the beneficial effects of the utility model are that: the well pipe structure is made of steel, and the pipe section I which is used most is spliced, so that later-stage disassembly and recovery are facilitated; a corresponding mounting structure is designed for facilitating the mounting of the first pipe section, and the mounting efficiency can be improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a schematic structural view of a construction platform and a clamping structure.
Fig. 3 is a schematic structural diagram of the first pipe section.
Fig. 4 is a schematic structural diagram of a second pipe section.
Fig. 5 is a schematic structural diagram of a pipe section three.
Fig. 6 is a schematic view of the structure of the ring-shaped member.
Figure 7 is a view of a well tubular structure down pipe in a state.
Fig. 8 is a use state reference diagram.
Wherein the reference numerals are: 1. a first pipe section; 2. a second pipe section; 3. a pipe section III; 4. an annular member; 5. an annular collet; 6. constructing a platform; 7. a clamping structure; 8. a universal wheel; 10. hoisting equipment; 11. a gravel cushion layer; 12. a water surface; 13. a water pump; 14. a water pumping pipe; 101. a cylinder; 102. a semicircular ring; 103. inserting slots; 104. inserting a column; 201. a first convex circular ring; 301. a convex circular ring II; 401. a limiting ring; 601. an annular boss; 602. a support; 701. fixing the rod; 702. a bidirectional screw; 703. a clamping plate; 704. a protrusion; 705. a U-shaped groove; 706. an arc-shaped portion; 707. hand wheel.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment is as follows:
referring to fig. 1, 3, 4, 5 and 6, the well casing structure for the recoverable dewatering well comprises a plurality of first pipe sections 1 and second pipe sections 2, wherein external threads are arranged at two ends of each first pipe section 1, each first pipe section is formed by splicing two semicircular rings 102, and the adjacent first pipe sections 1 are connected with an annular member 4 through threaded connection;
the outer side of the upper end of the pipe section II 2 is provided with a convex ring I201, the convex ring I201 is connected with the pipe section I at the lowest layer through threads, the pipe section I is positioned inside the convex ring I201, and the lower end of the pipe section II 2 can be arranged in the convex ring I201 through threads;
the pipe fitting is characterized by further comprising a pipe section III 3 and an annular bottom support 5 arranged below the pipe section III 3, a convex circular ring II 301 is arranged on the outer side of the upper end of the pipe section III 3, the convex circular ring II 301 is connected with the pipe section II on the lowest layer through threads, the pipe section II is located inside the convex circular ring II 301, the annular bottom support 5 is arranged below the pipe section III 3 through threads, the lower part of the pipe section III 3 and the lower part of the annular bottom support 5 are sealed, and a gap is formed between the lower surface of the pipe section III 3 and the inner bottom surface of the annular bottom support 5;
a plurality of filter holes are formed in the side wall of the second pipe section 2, the side wall of the third pipe section 3 and the sealing end of the third pipe section 3;
a plurality of lifting lugs are uniformly distributed on the outer wall of the pipe section III 3 in the circumferential direction;
the first pipe section 1, the second pipe section 2, the third pipe section 3 and the annular bottom support 5 are all made of steel.
The sealed end of the second pipe section 2 is used for supporting the water suction pump 13, and the interval between the sealed end and the annular bottom support 5 can be used for depositing mud, so that the water suction pump 13 is prevented from being blocked by mud entering from the upper end of a well head.
A slot 103 is arranged in the middle of the opening end of one semicircular ring 102, and an insertion block 104 inserted in the slot 103 is arranged in the middle of the opening end of the other semicircular ring 102.
Lifting lugs can also be arranged on the outer walls of the first pipe section 1 and the second pipe section 2
Example two:
referring to fig. 1 and 2, a mounting structure for a recoverable dewatering well tubular structure in the first embodiment comprises a construction platform 6, wherein a circular hole with an inner diameter larger than that of a dewatering well is formed in the construction platform 6, an annular boss 601 is arranged on the construction platform 6 and on the outer side of the circular hole, a convex groove with an upward opening is formed in the annular boss 601, an annular plate matched with the convex groove is rotatably arranged in the convex groove, supports 602 are symmetrically arranged on the annular plate, and a clamping structure 7 for clamping a first pipe section 1 is arranged between the two supports 602.
The clamping structure 7 comprises a fixing rod 701 connected with two supports 602 and a bidirectional screw 702 rotatably arranged between the two supports 602, the bidirectional screw 702 and the fixing rod 701 are located outside circular holes, two ends of the bidirectional screw 702 are provided with clamping plates 703 through threaded connection, the clamping plates 703 are sleeved on the fixing rod 701, two protrusions 704 are symmetrically arranged on opposite surfaces of the two clamping plates 703, a vertically through U-shaped groove 705 is formed in each protrusion 704, a cylinder 101 matched with the U-shaped groove 705 is arranged on the outer wall of the lower portion of the pipe section I1 and above the threaded connection, the cylinder 101 can be inserted into the U-shaped groove 705, and the bidirectional screw 702 is driven by a power mechanism. The power mechanism may be a motor with a speed reducer or a hand wheel 707.
There is a gap between the outer wall of the cylinder 101 and the inner wall of the U-shaped groove 705. Therefore, fine adjustment can be conveniently realized in the butt joint process of the first pipe section 1.
An arc-shaped part 706 matched with the outer wall of the pipe section I1 is arranged between the two protrusions 704, and the inner diameter of the arc-shaped part 706 is slightly larger than or equal to the outer diameter of the pipe section I1.
Two openings are formed in the two supports 602 and located below the clamping plate 703, the U-shaped rod 9 is arranged in the two openings in a sliding mode, a limiting ring 401 is arranged on the outer wall of the ring-shaped piece 4, two end portions of the U-shaped rod 9 can be inserted into the lower portion of the limiting ring 401, and the limiting ring 401 is overlapped on the U-shaped rod 9.
Example three;
referring to fig. 1-8, a construction method of a recoverable dewatering well tubular structure is characterized by comprising the following specific steps:
s1, pouring crushed stones with the thickness of 50cm into the precipitation well to serve as a crushed stone cushion layer 11; (convenient later placing ring shaped bottom support 5)
S2, erecting a construction platform 6, enabling the circular hole on the construction platform 6 to coincide with the circle center of the dewatering well, leveling and fixing;
s3, connecting the annular bottom support 5 and the pipe section III 3 through threads, and placing the pipe section III into a precipitation well through hoisting equipment;
s4, when only the convex circular ring II 301 of the residual pipe section III 3 is exposed out of the dewatering well, stopping the hoisting equipment, manually installing a pipe section II 2, and then starting the pipe laying by the hoisting equipment;
s5, when only the convex circular ring I201 of the remaining pipe section II 2 is exposed out of the dewatering well, stopping the hoisting equipment, manually installing the second pipe section II 2, and then starting the pipe laying by the hoisting equipment;
s6, repeating S5 according to the height of the water level, stopping the hoisting equipment when the convex circular ring I201 of the last section of the pipe section II 2 is exposed out of the precipitation well, and installing the pipe section I1; the first pipe section 1 is located above the water level.
S7, rotating the bidirectional screw 702, adjusting the positions of the two clamping plates 703 to enable the two semicircular rings 102 to be placed at the positions of the clamping plates 703 and the open ends of the two semicircular rings to be opposite, then rotating the bidirectional screw 702 to enable the insert block 104 to enter the slot 103, simultaneously inserting the U-shaped groove 705 into the column body 101, and installing the annular part 4 above the first pipe section 1; the first pipe section 1 is substantially concentric with the second pipe section 2 under the definition of the U-shaped groove 705 and the clamping plate 703, and fine adjustment can be achieved due to the clearance between the U-shaped groove 705 and the column 101.
S8, rotating the support 602, driving the first pipe section 1 to rotate by the U-shaped groove 705, enabling the first pipe section 1 to enter the first convex ring 201, and starting a lower pipe by the hoisting equipment; the U-shaped groove 705 is inserted into the column body 101 on the first pipe section 1, and the U-shaped groove 705 is vertically communicated, so that the downward movement of the first pipe section 1 in the rotating process is not influenced, and the threaded connection of the first pipe section 1 is realized;
s9, when only the ring-shaped part 4 is exposed out of the dewatering well, stopping the hoisting equipment, repeating S7 to install the first second pipe section 1, and starting the pipe laying by the hoisting equipment;
s10, installing the remaining first pipe section 1 according to the depth of the foundation pit;
and S11, filling gravel around the pipe joints after the pipe descending is finished. Therefore, the pipeline can be integrally lifted in the later stage, graded broken stones are generally selected, the particle size of the broken stones is larger than the aperture of the filtering hole, the broken stones are prevented from entering a well pipe, the filling thickness is 10cm, and the filtering effect is achieved. Finally, cleaning the pipeline, and installing a water pumping pump 13 and a water pumping pipe 14.
After the hoisting equipment stops, the U-shaped rod 9 is inserted into the through hole, so that the limiting ring 401 or the convex ring two 301 or the convex ring one 201 can be lapped on the U-shaped rod 9. Therefore, the pipeline in the dewatering wellhead can be limited through the U-shaped rod 9, the phenomenon that the pipeline falls down due to the fact that the lifting equipment 10 breaks down or is operated by mistake is avoided, and the safety of the butt joint of the pipe sections is improved. The hoisting equipment generally adopts a truck-mounted crane.
It should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical features that the utility model has not been described can be realized through or adopt prior art, and no longer give unnecessary details here, and of course, the above-mentioned explanation is not right the utility model discloses a restriction, the utility model discloses also not only be limited to the above-mentioned example, ordinary skilled person in this technical field is in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should belong to the utility model discloses a protection scope.
Claims (7)
1. The well pipe structure of the recoverable dewatering well is characterized by comprising a plurality of pipe sections I and pipe sections II, wherein external threads are arranged at two ends of each pipe section I, each pipe section I is formed by splicing two semicircular rings, and two adjacent pipe sections I are connected with a ring-shaped piece through threaded connection;
a first convex ring is arranged on the outer side of the upper end of the second pipe section, the first convex ring is connected with the first pipe section at the lowest layer through threads, the first pipe section is positioned inside the first convex ring, and the lower end of the second pipe section can be arranged in the first convex ring through threads;
the pipe fitting is characterized by further comprising a pipe section III and an annular bottom support arranged below the pipe section III, wherein a convex circular ring II is arranged on the outer side of the upper end of the pipe section III, the convex circular ring II is connected with the pipe section II at the lowest layer through threads, the pipe section II is located inside the convex circular ring II, the annular bottom support is arranged below the pipe section III through threads, the lower part of the pipe section III and the lower part of the annular bottom support are sealed, and a gap is formed between the lower surface of the pipe section III and the inner bottom surface of the annular bottom support;
a plurality of filter holes are formed in the side wall of the second pipe section, the side wall of the third pipe section and the sealing end of the third pipe section;
a plurality of lifting lugs are uniformly distributed on the outer wall of the pipe section III in the circumferential direction;
the first pipe section, the second pipe section, the third pipe section and the annular bottom support are all made of steel.
2. The recoverable dewatering well tubular structure according to claim 1, wherein a slot is formed in a middle position of the open end of one of the semicircular rings, and an insert block inserted into the slot is formed in a middle position of the open end of the other semicircular ring.
3. The mounting structure for the recoverable dewatering well pipe structure according to claim 1 is characterized by comprising a construction platform, wherein a round hole with an inner diameter larger than that of a dewatering well is formed in the construction platform, an annular boss is arranged on the construction platform and located on the outer side of the round hole, a convex groove with an upward opening is formed in the annular boss, an annular plate matched with the convex groove is rotationally arranged in the convex groove, supports are symmetrically arranged on the annular plate, and a clamping structure for clamping the first pipe section is arranged between the supports.
4. The mounting structure of the recoverable dewatering well tubular structure according to claim 3, wherein the clamping structure comprises a fixing rod for connecting the two supports and a bidirectional screw rod rotatably arranged between the two supports, the bidirectional screw rod and the fixing rod are both located outside the round hole, clamping plates are arranged at two ends of the bidirectional screw rod through threaded connection, the clamping plates are sleeved on the fixing rod, two protrusions are symmetrically arranged on opposite surfaces of the two clamping plates, U-shaped grooves which are vertically communicated are formed in the protrusions, a cylinder matched with the U-shaped grooves is arranged on the outer wall of the lower portion of the first pipe section and above the threaded connection portion, the cylinder can be inserted into the U-shaped grooves, and the bidirectional screw rod is driven by a power mechanism.
5. The mounting structure of the recoverable well tubular structure of dewatering wells according to claim 4, wherein there is a gap between the outer wall of the cylindrical body and the inner wall of the U-shaped groove.
6. The recoverable dewatering well tubular structure mounting structure according to claim 4, wherein an arc-shaped portion is provided between two of the projections, which arc-shaped portion engages with an outer wall of the first pipe section, and the inner diameter of the arc-shaped portion is slightly larger than or equal to the outer diameter of the first pipe section.
7. The well tubular structure installation structure of recoverable dewatering wells according to claim 4, characterized in that the brackets are provided with universal wheels contacting the upper end face of the construction platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220786207.6U CN217267577U (en) | 2022-04-06 | 2022-04-06 | Recoverable precipitation well tubular construction and mounting structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220786207.6U CN217267577U (en) | 2022-04-06 | 2022-04-06 | Recoverable precipitation well tubular construction and mounting structure thereof |
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| CN217267577U true CN217267577U (en) | 2022-08-23 |
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| CN202220786207.6U Active CN217267577U (en) | 2022-04-06 | 2022-04-06 | Recoverable precipitation well tubular construction and mounting structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290048A (en) * | 2023-03-14 | 2023-06-23 | 中铁二十二局集团轨道工程有限公司 | Spliced stratum water-reducing pipeline |
-
2022
- 2022-04-06 CN CN202220786207.6U patent/CN217267577U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290048A (en) * | 2023-03-14 | 2023-06-23 | 中铁二十二局集团轨道工程有限公司 | Spliced stratum water-reducing pipeline |
| CN116290048B (en) * | 2023-03-14 | 2024-06-14 | 中铁二十二局集团轨道工程有限公司 | Spliced stratum water-reducing pipeline |
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