CN218437069U - Constant-pressure retreating type grouting guide pipe - Google Patents
Constant-pressure retreating type grouting guide pipe Download PDFInfo
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- CN218437069U CN218437069U CN202221088924.8U CN202221088924U CN218437069U CN 218437069 U CN218437069 U CN 218437069U CN 202221088924 U CN202221088924 U CN 202221088924U CN 218437069 U CN218437069 U CN 218437069U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a formula slip casting pipe is retreated to constant voltage, include: a first conduit and a second conduit. The grouting holes arranged along the first guide pipe 1 are divided into three sections, each section of grouting holes are arranged along a straight line, and the circumferential positions of the drill holes among the sections of grouting holes are different by 1/3 of the hole pitch. The grouting holes on the second guide pipe are arranged along a straight line. The grouting holes and the grouting holes form an opening section and a closing section according to a positional relationship. And the retreating type grouting is realized through the three-time opening section and the three-time closing section in sequence. The utility model discloses only need to change the arrangement mode in the injected hole of pipe, can realize the formula slip casting that retreats, avoid the tradition to retreat the shortcoming of formula slip casting worker's method simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the underground works construction, a formula slip casting pipe is retreated to constant voltage is related to.
Background
The backward grouting is a commonly used grouting method in underground engineering construction, and after a guide pipe is driven into a stratum, a better grouting effect is realized by gradually backward retreating a grouting pipe and performing sectional grouting.
The method has the following defects:
(1) After grouting is stopped, grouting pressure is rapidly reduced, and particularly under the condition that underground water exists or vertically upwards grouting exists, the grouting pressure is difficult to guarantee;
(2) The process is complicated, and after the existing method finishes primary grouting, the processes of loosening a grout stop plug, retreating a grouting pipe, dismantling redundant grouting pipes, reinstalling a hole packer and the like are needed, so that continuous construction cannot be realized;
(3) When the slurry is quickly condensed, the grouting pipe is difficult to retreat, and the pipe clamping phenomenon is easy to occur.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims to provide a formula slip casting pipe is retreated to constant voltage only needs to change the position in traditional pipe slip casting hole, alright realize retreating the formula slip casting, avoids the technique that above-mentioned background art mentioned not enough simultaneously to corresponding construction process has been proposed.
The utility model discloses a technical scheme be a constant voltage retreat formula slip casting's pipe, include: a first conduit 1 and a second conduit 2. The first grouting holes 12 arranged along the first guide pipe 1 are divided into three sections, each section of grouting hole is arranged along a straight line, and the circumferential positions of the drill holes among the sections of grouting holes are different by 1/3 of the hole pitch. The second injection holes 22 on the second guide duct 2 are arranged in a straight line. The first and second grout holes 12 and 22 form an open section and a closed section according to a positional relationship.
Further, during construction, the first guide pipe 1 is sleeved on the second guide pipe 2, and the first guide pipe 1 is connected with the second guide pipe 2 through the screw thread 134 and the nut 234; the three sections corresponding to the first grouting holes 12 are an A section, a B section and a C section; firstly, aligning a first grouting hole 12 and a second grouting hole 22 of the section A, wherein the section A is an open section, and the sections B and C are closed sections, and grouting to the designed pressure or grouting amount through a second conduit 2 to complete the grouting of the section A; rotating the second guide pipe 2 to align the first grouting holes 12 and the second grouting holes 22 of the section B, wherein the section B is an open section, the sections A and C are closed sections, and grouting is carried out to the designed pressure or grouting amount through the second guide pipe 2 to complete the section B grouting; and rotating the second guide pipe 2 again to align the first grouting holes 12 and the second grouting holes 22 of the C section, wherein the C section is an open section, and the A section and the B section are closed sections, so that the C section grouting is completed, and the retreating type grouting is realized.
Further, after the backward grouting is completed, the valve 236 is closed, and the second conduit 2 can be pulled out after the slurry is slightly solidified and cannot flow backwards through the first conduit 1. If the pipe is blocked, the second guide pipe 2 can be pushed out by the reaction force after the high-pressure water is injected.
Further, the length of the second conduit 2 can be reused.
Further, the first conduit 1 comprises: a fixing rib 11, a first injection hole 12, and a first pipe joint 13. The fixing ribs 11 are two triangular steel plates welded on the outer side of the pipe body of the first guide pipe 1, and the fixing ribs 11 are used for preventing the first guide pipe 1 from rotating when the second guide pipe 2 is rotated. The first grouting hole 12 is divided into three sections a, B, and C.
Further, the first conduit joint 13 includes: a first scale 131, a second scale 132, a third scale 133, a thread 134 and a grout stop 135. The first scale 131, the second scale 132 and the third scale 133 are used for determining the rotation angle of the second guide pipe 2 when the first guide pipe 1 is connected with the second guide pipe 2. The first scale 131 is aligned with the first grout hole 12 of the section a, the second scale 132 is aligned with the first grout hole 12 of the section B, and the third scale 133 is aligned with the first grout hole 12 of the section C. The first conduit 1 and the second conduit 2 are connected together by means of a screw 134. The grout stopper 135 is disposed at the connection of the first conduit 1 and the second conduit 2 to prevent the loss of grout.
The second guide duct 2 includes: a centralizer 21, a second grouting hole 22, and a second conduit joint 23. The outer diameter of the second conduit 2 is 2 to 3mm smaller than the inner diameter of the first conduit 1. The centering device 21 is made of rubber and is uniformly distributed in the circumferential direction of the second guide pipe 2; the second grouting holes 22 are arranged along the length direction of the second guide pipe 2, and the second grouting holes 22 on the second guide pipe 2 and the first grouting holes 12 on different grouting sections on the first guide pipe 1 are opened and closed by rotating the second guide pipe 2. A second conduit fitting 23 is provided at the end of the second conduit 2.
Further, the second conduit joint 23 is composed of a sealing ring 231, a backing plate 232, a fourth scale 233, a nut 234, a handle 235, a valve 236 and a port 237. The seal ring 231 is made of rubber and is provided in the outer circumferential direction of the second conduit 2; the backing plate 232 is welded to the pipe body of the second conduit 2 and clamped at the bottom of the nut 234, and the first conduit 1 and the second conduit 2 are connected by tightening the nut 234 and the thread 134.
Wherein, the fourth scale 233 is provided on the outer wall of the second guide pipe 2 for indicating the relative position of the first guide pipe 1 and the second guide pipe 2, and the fourth scale 233 is aligned with the second injection hole 22. The nut 234 is used for connecting the second guide duct 2 and the first guide duct 1. A handle 235 is provided on the outer wall of the second guide duct 2 for rotating the second guide duct 2. A valve 236 is provided on the second conduit 2 for ensuring that the pressure in the second conduit 2 is stable after the grouting has stopped. Immediately closing the valve 236 after stopping grouting to ensure that grouting pressure slowly decreases and prevent slurry from flowing backwards when underground water exists. An interface 237 is provided at the end of the second conduit 2 for connection to a grouting pump.
The utility model discloses compare with traditional slip casting pipe, only need change the arrangement mode in the injected hole of pipe, can realize the formula slip casting that retreats, avoid the tradition to retreat the shortcoming of formula slip casting worker's method simultaneously.
Drawings
Fig. 1 is an overall model of a constant pressure retrograde grouting pipe.
Fig. 2 is a development view of a first catheter 1 and a second catheter 2.
Fig. 3 is an elevation view of a fixation rib.
Figure 4 first conduit fitting.
Figure 5 a second catheter hub.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
A constant pressure retrograde grouting conduit, comprising: a first conduit 1 and a second conduit 2, as shown in fig. 1. The first grouting holes 12 arranged along the first guide pipe 1 are divided into three sections, each section of grouting hole is arranged along a straight line, and the circumferential positions of the drill holes among the sections of grouting holes have a difference of 1/3 pitch, as shown in fig. 2. The second injection holes 22 on the second guide duct 2 are arranged in a straight line. The first and second grout holes 12 and 22 form an opening section and a closing section according to a positional relationship.
Further, during construction, the first guide pipe 1 is sleeved on the second guide pipe 2, and the first guide pipe 1 is connected with the second guide pipe 2 through the screw 134 and the nut 234; the three sections corresponding to the first grouting holes 12 are an A section, a B section and a C section; firstly, aligning a first grouting hole 12 and a second grouting hole 22 of the section A, wherein the section A is an open section, and the sections B and C are closed sections, and grouting to the designed pressure or grouting amount through a second guide pipe 2 to finish the section A grouting; rotating the second guide pipe 2 to align the first grouting hole 12 and the second grouting hole 22 of the section B, wherein the section B is an open section, the sections A and C are closed sections, and grouting is carried out through the second guide pipe 2 to the designed pressure or grouting amount to complete the grouting of the section B; and rotating the second conduit 2 again to align the first grouting hole 12 and the second grouting hole 22 of the C section, wherein the C section is an open section, and the A section and the B section are closed sections, so that the C section grouting is completed, and the retreating type grouting is realized.
Further, after the backward grouting is completed, the valve 236 is closed, and the second conduit 2 can be pulled out after the grout is slightly solidified and cannot flow back through the first conduit 1. If the pipe is blocked, the second guide pipe 2 can be pushed out by the reaction force after the high-pressure water is injected.
Further, the length of the second conduit 2 can be reused.
Further, the first conduit 1 comprises: a fixing rib 11, a first grout hole 12, and a first pipe joint 13. The first catheter 1 is shown in an expanded view in fig. 2.
Wherein, the fixing rib 11 is two triangular steel plates welded on the outer side of the pipe body of the first guide pipe 1, as shown in fig. 3, the fixing rib 11 is used for preventing the first guide pipe 1 from rotating when the second guide pipe 2 is rotated.
Wherein, first injected hole 12 divide into A, B, C three-section, and the first injected hole 12 of B section compares A section clockwise rotation 1/3 pitch-row, and the first injected hole 12 of C section compares B section clockwise rotation 1/3 pitch-row (the utility model discloses with the pipe afterbody under, the head is last, and the right rotation is clockwise).
The first conduit joint 13 is shown in fig. 4, and includes: a first scale 131, a second scale 132, a third scale 133, a thread 134 and a grout stop plug 135, as shown in fig. 4.
The first scale 131, the second scale 132 and the third scale 133 are used for determining the rotation angle of the second conduit 2 when the first conduit 1 is connected with the second conduit 2. The first scale 131 is aligned with the first grout hole 12 of the section a, the second scale 132 is aligned with the first grout hole 12 of the section B, and the third scale 133 is aligned with the first grout hole 12 of the section C.
Wherein the first conduit 1 and the second conduit 2 are connected together by means of a screw 134.
Wherein, the grout stop plug 135 is arranged at the connection position of the first conduit 1 and the second conduit 2 for preventing grout from losing.
The second guide duct 2 includes: a centralizer 21, a second grouting hole 22, and a second conduit joint 23. The outer diameter of the second conduit 2 is 2-3 mm smaller than the inner diameter of the first conduit 1, and a gap exists, so that a small amount of slurry can still leak out from the closing section due to the existence of the gap during grouting, and the blockage of the slurry can be prevented.
Wherein, centralizer 21 is made of rubber, and the effect is as follows:
(1) In order to make the second conduit 2 rotate smoothly, a gap of 1-1.5 mm exists between the second conduit 2 and the first conduit 1, and a little slurry leaks out from the closing section during grouting. When the second pipe 2 was placed in the middle, can guarantee to open the first injected hole 12 and the second injected hole 22 of section and aim at, the gap between first pipe 1 and the second pipe 2 is less, and it is little to open section resistance, and it is few to close section hourglass thick liquid volume, guarantees the segmentation slip casting effect. If the second guide pipe 2 can not be centered, the first grouting holes 12 and the second grouting holes 22 can not be aligned, the gap between the first guide pipe 1 and the second guide pipe 2 is large, the resistance of the opening section is increased, the leakage amount of the closing section is increased, and the grouting effect is affected.
(2) The longitudinal communication of the grout between different grouting sections can be closed, the grout leakage is reduced, and the sectional grouting effect is improved.
(3) If the pipe is jammed after the grouting is completed, the nut 234 can be loosened, the clean water is injected through the second guide pipe 2 in a pressurized manner, and the second guide pipe 2 is pulled out through the reaction force provided by the centralizer 21.
Wherein the second grouting holes 22 are arranged along a straight line, and the opening and closing of the second grouting holes 22 on the second guide pipe 2 and the first grouting holes 12 on different grouting sections on the first guide pipe 1 can be realized by rotating the second guide pipe 2.
The second conduit joint 23 is composed of a sealing ring 231, a backing plate 232, a fourth scale 233, a nut 234, a handle 235, a valve 236 and a port 237, as shown in fig. 5.
Wherein, sealing washer 231 is made by rubber, and the effect is:
(1) When the first conduit 1 and the second conduit 2 are connected together, a sealing function is achieved;
(2) The flexible connection is realized, when the first conduit 1 and the second conduit 2 are connected, the rotating nut 234 is not too tight, and the slurry is not leaked, and because the sealing ring 231 is flexible, the rotating handle 235 can realize the rotation of the second conduit 2 without completely loosening the nut 234, so that the continuous sectional grouting is realized. The seal ring 231 can be replaced after being worn.
The backing plate 232 is welded with the pipe body of the second conduit 2, the backing plate 232 is clamped at the bottom of the nut 234 during construction, and the first conduit 1 and the second conduit 2 are connected by screwing the nut 234 and the thread 134.
Wherein the fourth scale 233 is used for indicating the relative position of the first guide pipe 1 and the second guide pipe 2, and the fourth scale 233 is aligned with the second grouting hole 22. When the fourth scale 233 is aligned with the first scale 131, the section a is opened, and the sections B and C are closed; when the fourth scale 233 is aligned with the second scale 132, the section B is opened, and the sections a and C are closed; when the fourth scale 233 is aligned with the third scale 133, the section C is opened, and the sections a and B are closed;
wherein the nut 234 is used for connection with the first guide duct 1.
Wherein the handle 235 is used to rotate the second catheter 2.
Wherein the valve 236 is used to ensure that the pressure does not drop after the grouting is stopped. The valve 236 is closed immediately after grouting is stopped, so that the grouting pressure can be ensured to be slowly reduced, and the slurry can be prevented from flowing backwards when underground water exists.
Wherein the interface 237 can be connected to a grouting pump.
The grouting guide pipe is divided into a first guide pipe 1 and a second guide pipe 2, and the second guide pipe 2 can be reused;
the circumferential positions of all sections of grouting holes on the first guide pipe 1 have a difference of 1/3 hole pitch;
by rotating the second conduit 2, the scale 233 is aligned with the first scale 131, the second scale 132 and the third scale 133 in sequence, so that the backward grouting can be realized; the valve 236 is closed after grouting stops, so that grouting pressure is not reduced; if the pipe is jammed after the grouting is completed, the nut 234 can be loosened, the clean water is injected through the second guide pipe 2 in a pressurized manner, and the second guide pipe 2 is pulled out through the reaction force provided by the centralizer 21.
Examples
Taking a conduit with the length of 4.5m and the diameter of 42mm as an example, the specific construction process is as follows
(1) Making a steel pipe with the length of 4.5m and the thickness of 3.5mm into a cone (sealing without slurry leakage) with the head part of 100mm, and turning a thread 13 with the tail part of 50 mm; in the range of 100-4300 mm from the head, drilling first grouting holes 12 with the diameter of 6mm, wherein the longitudinal distance between the first grouting holes 12 is 150mm, the circumferential distance is 33mm, the first grouting holes are divided into three sections A, B and C according to 1400mm, the first grouting holes 12 in the section B are clockwise rotated by 11mm compared with the section A, the first grouting holes 12 in the section C are clockwise rotated by 11mm compared with the section B, and then 200mm (50 mm including 134 sections of threads) is not drilled; welding a fixed rib 11 on the section A; the tail end of the first conduit 1 is provided with a scale 131, a scale 132 and a scale 133 on the surface by an angle grinder or a marking pen;
(2) Adopting a 50mm drilling machine to form a hole;
(3) Driving the first guide pipe 1, and then keeping 100mm (50 mm containing a thread 134 section) outside the hole;
(4) Installing a grout stop plug 135;
(5) A steel pipe with the diameter of 32mm is adopted to manufacture the second guide pipe 2, and the thickness of the centralizer 21 is 1.5mm; drilling a second grouting hole 22 with the diameter of 6mm, wherein the second grouting hole 22 corresponds to the first grouting hole 12 in position, but is longitudinally arranged in a straight line;
(6) Aligning the fourth scale 233 with the first scale 131, and screwing the nut 234 and the thread 134 together until the fourth scale is screwed tightly;
(7) Connecting a grouting pump at the interface 237, opening the valve 236 to start grouting, wherein the grouting section is the section A, and grouting to the designed pressure or grouting amount;
(8) Rotating the handle 235 until the fourth scale 233 is aligned with the second scale 132, slightly loosening the nut 234 if the rotation is difficult, screwing the nut 234 after the rotation is in place, and starting grouting, wherein the grouting section is a section B and grouting is carried out until the designed pressure or grouting amount is reached;
(9) Finishing grouting in the section C in the same way;
(10) Stopping grouting while valve 236 is closed;
(11) After the slurry is slightly solidified and cannot flow backwards through the first conduit 1, loosening the nut 234, pulling out the second conduit 2, and if pipe clamping occurs, injecting high-pressure water after loosening the nut 234, and pushing out the second conduit 2 through the reaction force of the centralizer 21;
(12) The second conduit 2 is cleaned and the next conduit is grouted.
Compared with the prior art, the invention has the following main technical advantages:
according to the traditional retreating type grouting process, grouting point positions need to be arranged at positions to be grouted, a drilling machine is adopted for drilling, a grouting pipe and a hole packer are installed after the designed depth of a drilled hole is achieved, grouting is started after the hole packer is placed at the designed position inside the grouting pipe, grouting is started after the designed requirements of grouting are met, the hole packer is retreated by a certain grouting distance, grouting is started again, and the working process is repeated until all grouting work is finished. The traditional retreating type grouting realizes the purpose of sectional grouting on soil bodies, grouting slurry with different proportions can be selected for soil bodies with different depths, and a better grouting purpose is realized. However, the traditional retreating type grouting has the following defects:
(1) The sectional grouting effect is greatly influenced by stratum conditions and grouting positions, and the grouting pressure is rapidly reduced after grouting is stopped, so that particularly under the condition of underground water or vertically upward grouting, slurry is easy to flow back under the action of gravity and underground water pressure, and the grouting effect is difficult to ensure;
(2) The process is complicated, and after the existing method finishes primary grouting, the processes of loosening a grout stop plug, retreating a grouting pipe, dismantling redundant grouting pipes, reinstalling a hole packer and the like are needed, so that continuous construction cannot be realized;
(3) When the slurry is quickly coagulated, the grouting pipe is difficult to retreat, and the pipe clamping phenomenon is easy to occur.
Compared with the method, the invention mainly solves the following problems:
(1) The invention relates to a stratum retreating type grouting backflow prevention technology, which mainly comprises a first guide pipe and a second guide pipe, wherein grouting holes are arranged at different positions on the first guide pipe, the second grouting pipe can be controlled to rotate in the grouting process to realize retreating sectional type grouting on stratum soil bodies at different depths, after one section of grouting work is finished, the second guide pipe can be rotated to realize the closing of the section of grouting hole and the opening of the lower section of grouting hole, so that the pressure of grout is not dissipated, the problem that grout flows back along the grouting holes under the action of the pressure of underground water and the self weight during vertical grouting is prevented, and the sectional grouting effect on the stratum is further ensured.
(2) The invention relates to a constant-pressure retreating type grouting continuous construction technology, which is a traditional retreating type grouting continuous construction technology, wherein the traditional retreating type grouting process is complicated, and the conventional construction method needs to loosen a grout stop plug, retreat a grouting pipe, remove a redundant grouting pipe, reinstall a hole packer and other processes after one-time grouting is finished, so that continuous construction cannot be realized. The construction process saves complicated procedures such as installing a hole packer and the like, grouting pressure does not need to be reduced in the retreating grouting process, the grouting pressure keeps constant, the grouting effect of a grouting section is guaranteed, meanwhile, continuous construction is realized, and the grouting work efficiency and effect are improved.
(3) The invention relates to a retreating type grouting low-pressure pipe-clamping-prevention technology.A plurality of centralizers are arranged between a first conduit and a second conduit, when slurry is quickly condensed, high-pressure water can be injected through a grouting pipe, the high-pressure water acts on the plurality of centralizers to generate multiple thrust on the second conduit, the same water pressure can act on the centralizers for multiple times under the condition of not needing very high water pressure, the centralizers can provide reaction force for the second conduit under the action of the water pressure, the reaction force of the plurality of centralizers is finally superposed on the second conduit, the action efficiency of the water pressure on the second conduit in the pushing-out process is improved, the centralizers can be smoothly pushed out under the action of lower water pressure, the problem of pipe clamping is solved, and the utilization efficiency of the water pressure is improved.
Claims (6)
1. The utility model provides a formula slip casting pipe is backed up to constant pressure which characterized in that: the method comprises the following steps: a first conduit (1) and a second conduit (2); the first grouting holes (12) arranged along the first guide pipe (1) are divided into three sections, each section of grouting hole is linearly arranged, and the circumferential positions of drill holes among the sections of grouting holes are different by 1/3 of hole distance; the second grouting holes (22) on the second conduit (2) are arranged along a straight line; the first grouting hole (12) and the second grouting hole (22) form an opening section and a closing section according to a positional relationship; the outer diameter of the second conduit (2) is 2-3 mm smaller than the inner diameter of the first conduit (1).
2. The constant pressure retrograde grouting conduit of claim 1, wherein: the first conduit (1) comprises: a fixing rib (11), a first grouting hole (12) and a first pipe joint (13); the fixing ribs (11) are two triangular steel plates and are welded on the outer side of the pipe body of the first guide pipe (1); the first grouting hole (12) is divided into three sections A, B and C; a first conduit connection (13) is arranged at the end of the first conduit (1).
3. The constant pressure retrograde grouting conduit of claim 2, wherein: the first conduit fitting (13) comprises: the device comprises a first scale (131), a second scale (132), a third scale (133), a thread (134) and a grout stop plug (135); the first scale (131), the second scale (132) and the third scale (133) are arranged on the outer wall of the first conduit (1); the first scale (131) is aligned with the first grouting hole (12) of the section A, the second scale (132) is aligned with the first grouting hole (12) of the section B, and the third scale 133 is aligned with the first grouting hole (12) of the section C; the first conduit (1) and the second conduit (2) are connected together through threads (134); the grout stop plug (135) is arranged at the joint of the first conduit (1) and the second conduit (2).
4. The constant pressure retrograde grouting conduit of claim 1, wherein: the second conduit (2) comprises: the centralizer (21), the second grouting hole (22) and the second conduit joint (23); the centralizers (21) are made of rubber and are uniformly distributed in the circumferential direction of the second conduit (2); the second grouting holes (22) are arranged along the length direction of the second guide pipe (2), and the second grouting holes (22) in the second guide pipe (2) and the first grouting holes (12) in different grouting sections on the first guide pipe (1) are opened and closed by rotating the second guide pipe (2); a second conduit connection (23) is arranged at the end of the second conduit (2).
5. The constant pressure retrograde grouting conduit of claim 4, wherein: the second catheter joint (23) consists of a sealing ring (231), a base plate (232), a fourth scale (233), a nut (234), a handle (235), a valve (236) and a connector (237); the sealing ring (231) is made of rubber and is arranged on the peripheral circumference of the second conduit (2); the backing plate (232) is welded at the pipe body of the second guide pipe (2) and clamped at the bottom of the nut (234), and the first guide pipe (1) is connected with the second guide pipe (2) by screwing the nut (234) and the thread (134);
the fourth scale (233) is arranged on the outer wall of the second guide pipe (2) and used for marking the relative position of the first guide pipe (1) and the second guide pipe (2), and the fourth scale (233) is aligned with the second grouting hole (22); the nut (234) is used for connecting the second conduit (2) and the first conduit (1); a handle (235) is arranged on the outer wall of the second conduit (2) and used for rotating the second conduit (2); the valve (236) is arranged on the second conduit (2); an interface (237) is provided at the end of the second conduit (2) for connection to a grouting pump.
6. The constant pressure retrograde grouting pipe of claim 1, wherein: the second conduit (2) is reusable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221088924.8U CN218437069U (en) | 2022-05-07 | 2022-05-07 | Constant-pressure retreating type grouting guide pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221088924.8U CN218437069U (en) | 2022-05-07 | 2022-05-07 | Constant-pressure retreating type grouting guide pipe |
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| Publication Number | Publication Date |
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| CN218437069U true CN218437069U (en) | 2023-02-03 |
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| CN202221088924.8U Active CN218437069U (en) | 2022-05-07 | 2022-05-07 | Constant-pressure retreating type grouting guide pipe |
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- 2022-05-07 CN CN202221088924.8U patent/CN218437069U/en active Active
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