CN212929047U - Corrugated expansion joint for saline-alkali soil pipeline laying - Google Patents
Corrugated expansion joint for saline-alkali soil pipeline laying Download PDFInfo
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- CN212929047U CN212929047U CN202020226467.9U CN202020226467U CN212929047U CN 212929047 U CN212929047 U CN 212929047U CN 202020226467 U CN202020226467 U CN 202020226467U CN 212929047 U CN212929047 U CN 212929047U
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- expansion joint
- saline
- corrugated
- ripple
- packing
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- 239000003513 alkali Substances 0.000 title claims description 30
- 239000002689 soil Substances 0.000 title claims description 25
- 239000000835 fiber Substances 0.000 claims abstract description 56
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 27
- 239000011780 sodium chloride Substances 0.000 claims abstract description 25
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 238000012856 packing Methods 0.000 claims description 35
- 239000012783 reinforcing fiber Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000005489 elastic deformation Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229920000114 Corrugated plastic Polymers 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009963 fulling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
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Abstract
The utility model discloses a ripple expansion joint for saline and alkaline land pipeline laying, which belongs to the field of ripple expansion joints, and relates to a ripple expansion joint for saline and alkaline land pipeline laying, which provides multilayer protection for the ripple expansion joint and greatly increases the service life of the ripple expansion joint, firstly, a ripple rubber sleeve positioned at the outer side is used as the first layer protection of the ripple expansion joint to directly resist the corrosion of external saline and alkaline, while the reinforced fiber and the capillary fiber laid in the ripple rubber sleeve can effectively cause the rupture caused by the elastic deformation of the ripple rubber sleeve, secondly, a filling ball filled in a filling cavity is used as the second layer protection of the ripple expansion joint, when the outer ripple rubber sleeve cracks or breaks, the filling ball is exposed, at the moment, the corrosion of saline and alkaline substances can be limited relieved by a closed air chamber formed by a plurality of filling fibers, and the service life of the ripple expansion joint is prolonged, and finally, the corrugated rubber sleeve positioned at the inner side becomes the final barrier of the corrugated expansion joint.
Description
Technical Field
The utility model relates to a ripple expansion joint field, more specifically say, relate to a ripple expansion joint for saline and alkaline land pipe laying.
Background
The corrugated expansion energy-saving expansion function is realized mainly by a corrugated pipe, the function and strength design of the corrugated expansion joint is mainly realized by the design of the corrugated pipe, and the corrugated pipe can be stretched, compressed or bent by different designs and combinations of the corrugated pipe, so that the corrugated expansion joint in three basic forms of axial direction, transverse direction and angular direction is formed.
The corrugated pipe compensator is a flexible element taking a corrugated pipe as a core, and compensation is performed on a pipeline in three directions, namely an axial direction, a transverse direction and an angular direction. The axial compensator is used for reducing the self-excitation phenomenon of a medium. The absence of an inner sleeve inside the product, which limits the radial compensation capability to a large extent, is generally only used to absorb or compensate axial displacements of the pipe: the transverse displacement compensator mainly absorbs transverse displacement perpendicular to the axis of the compensator, and the small pull rod transverse displacement compensator is suitable for absorbing transverse displacement and can also absorb the combination of axial displacement, angular displacement and displacement in any three directions: a hinge compensator. The universal hinge compensator can be matched with two or three compensators for absorbing transverse deformation in a one-way plane, and the universal hinge compensator can be matched with two or three compensators for absorbing deformation in a three-dimensional direction.
The saline-alkali soil is a kind of salt accumulation, which means that salt contained in the soil influences the normal growth of crops, and the formation of alkaline earth and alkaline soil is mostly related to the accumulation of carbonate in the soil, so that the alkalization degree is generally high, general plants in severe saline-alkali soil areas can not survive almost, the existing means for treating the saline-alkali soil with good effect mainly comprises a chemical method for putting chemical agents for neutralization, a physical method for uniformly treating mineral salt conveyed to the surface of the soil by utilizing the transpiration effect of liquid water after large-water irrigation or a biological method for utilizing saline-alkali tolerant plants.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
To the problem that exists among the prior art, the utility model aims to provide a ripple expansion joint for saline and alkaline land pipe laying, it can realize effectively prolonging the life of ripple expansion joint in the saline and alkaline land, reduces the input cost that the relevant infrastructure of saline and alkaline land improvement was under construction by a wide margin, increases saline and alkaline land improvement efficiency.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides a ripple expansion joint for saline and alkaline land pipeline laying, includes the ripple rubber tube, the equal fixedly connected with connecting terminal in both ends of ripple rubber tube, the ripple rubber tube includes the ripple gum cover, it has the packing chamber to open the chisel in the ripple gum cover, it has a plurality of packing balls to fill the intracavity packing, the packing ball includes the packing ball cover, a plurality of skeleton fibers of fixedly connected with in the packing ball cover, a plurality of skeleton fibers stagger the distribution process network structure in the packing ball cover, a plurality of packing fibers of fixedly connected with on the fibrous outer wall of skeleton, a plurality of packing fibers stagger each other and entangle and be in the same place, form a plurality of airtight air chambers, a plurality of entanglement fibers of outside fixedly connected with of packing ball cover can realize effectively prolonging the life of ripple expansion joint in saline and alkaline land, reduce the input cost of saline and alkaline land improvement relevant infrastructure construction by a wide margin, the corrugated expansion joint does not need to be repaired and replaced at high frequency, the normal saline-alkali soil treatment work is not easily influenced, and the saline-alkali soil treatment efficiency is increased.
Furthermore, the corrugated rubber sleeve comprises a rubber layer, the rubber layer is made of alkali-resistant wear-resistant rubber, and the corrosion speed of the corrugated rubber sleeve in the saline-alkali soil is slowed down.
Furthermore, a plurality of reinforcing fibers are pre-embedded in the rubber layer and are parallel to each other, the reinforcing fibers and the corrugated rubber tube are in the same axial direction, and the reinforcing fibers can greatly increase the strength of the rubber layer, so that the rubber layer is not easy to break when the rubber layer does reciprocating elastic motion along the axial direction of the corrugated rubber tube.
Furthermore, a plurality of capillary fibers are fixedly connected to the outer ends of the reinforcing fibers and are arranged in a staggered mode, and the capillary fibers can increase the toughness of the rubber layer, so that the rubber layer is not prone to cracking and falling off of the surface of the rubber layer due to multiple elastic deformation, and the service life of the rubber layer is further prolonged.
Further, the inner wall fixedly connected with leak protection net of ripple gum cover, and the leak protection net cup joints in the outside of a plurality of packing balls, and the leak protection net is used for the pocket net packing ball, when the ripple gum cover surface takes place crackle and damage, also must not lead to the packing ball to leak, is difficult for influencing the corrosion resisting property of ripple expansion joint.
Furthermore, the anti-leakage net is formed by weaving a plurality of corrosion-resistant fibers, the corrosion-resistant fibers comprise elastic rubber tubes, and the corrosion-resistant fibers are formed by twisting three elastic rubber tubes, so that the toughness of the corrosion-resistant fibers is greatly improved, and the anti-leakage net is not easy to break.
Furthermore, the elastic rubber tube is provided with an elastic cavity, and the elastic cavity is filled with high-pressure nitrogen, the elastic cavity can increase the elasticity of the elastic rubber tube and increase the whole impact resistance new energy of the leakage-proof net, and the high-pressure gas filled in the elastic cavity can easily keep the whole strength of the elastic rubber tube and is not easy to influence the toughness of the leakage-proof net.
Furthermore, the filling ball sleeve is filled with air, so that the air pressure inside the filling ball sleeve is slightly higher than normal atmospheric pressure, the whole body of the filling ball is convenient to shape, the filling ball is not easy to collapse under the action of external force, and the corrosion prevention effect of the filling ball is not easy to influence.
3. Advantageous effects
Compared with the prior art, the utility model has the advantages of:
the scheme provides multilayer protection for the corrugated expansion joint, greatly prolongs the service life of the corrugated expansion joint, firstly, the corrugated rubber sleeve positioned at the outer side is used as the first layer protection of the corrugated expansion joint and directly resists the corrosion of external saline alkali, the reinforcing fiber and the capillary fiber paved in the corrugated rubber sleeve can effectively reduce the fracture caused by the elastic deformation of the corrugated rubber sleeve, secondly, the filling ball filled in the filling cavity is used as the second layer protection of the corrugated expansion joint, when the outer corrugated rubber sleeve cracks or breaks, the filling ball is exposed, due to the action of entangled fiber, the filling ball is not easy to generate relative displacement even under the vibration action caused by the year-old impact of fluid transported in the corrugated rubber pipe, the filling cavity is easy to be evenly sewed and repaired, at the moment, the corrosion of saline alkali substances can be limited relieved by a closed air chamber formed by a plurality of filling fibers, and the service life of the corrugated expansion joint is prolonged, and at last, the ripple gum cover that is located the inboard then becomes the last protective screen of ripple expansion joint, can realize effectively prolonging the life of ripple expansion joint in the saline and alkaline land, reduces the input cost that the relevant infrastructure was administered to the saline and alkaline land by a wide margin, need not to carry out high frequency to the ripple expansion joint and repair and change, and the improvement work in normal saline and alkaline land is difficult for influencing increases saline and alkaline land improvement efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a front sectional view of the present invention;
FIG. 3 is a schematic view of the structure at A in FIG. 2;
fig. 4 is a schematic structural view of the packing ball of the present invention;
fig. 5 is a partial cross-sectional view of the corrugated rubber sleeve of the present invention;
fig. 6 is a schematic partial cross-sectional view of the leakage preventing net of the present invention.
The reference numbers in the figures illustrate:
the rubber tube comprises a 1 corrugated rubber tube, a 2 connecting terminal, a 3 corrugated rubber sleeve, a 301 rubber layer, 302 reinforcing fibers, 303 capillary fibers, 4 filling balls, 401 filling ball sleeves, 402 skeleton fibers, 403 filling fibers, 404 entangled fibers, 5 anti-leakage nets, 501 elastic rubber tubes, 502 elastic cavities and 503 hard burrs.
Detailed Description
The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the present invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all belong to the protection scope of the utility model.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be 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 present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-4, a corrugated expansion joint for saline-alkali soil pipeline laying comprises a corrugated rubber pipe 1, wherein both ends of the corrugated rubber pipe 1 are fixedly connected with connecting terminals 2, the corrugated rubber pipe 1 is communicated with other pipelines through the connecting terminals 2 at both ends, the connecting terminals 2 comprise a corrugated rubber sleeve 3, a filling cavity is formed in the corrugated rubber sleeve 3, a plurality of filling balls 4 are filled in the filling cavity, the filling balls 4 comprise a filling ball sleeve 401, a plurality of framework fibers 402 are fixedly connected in the filling ball sleeve 401, the framework fibers 402 are in a staggered distribution mesh structure in the filling ball sleeve 401, a plurality of filling fibers 403 are fixedly connected on the outer wall of the framework fibers 402, the filling fibers 403 are staggered and intertwined with each other to form a plurality of closed air chambers, a plurality of intertwined fibers 404 are fixedly connected outside the filling ball sleeve 401, adjacent filling balls 4 are intertwined with each other to form relative positioning through the intertwined fibers 404, the service life of the corrugated expansion joint in the saline-alkali soil can be effectively prolonged, the investment cost of the construction of related infrastructure for saline-alkali soil improvement is greatly reduced, high-frequency repair and replacement of the corrugated expansion joint are not needed, the normal saline-alkali soil improvement work is not easily influenced, and the saline-alkali soil improvement efficiency is increased.
Notably, the packing ball 4 is the major structure of the anti-salt alkali erosion in this scheme, wherein skeleton fibre 402 is the holistic skeleton of packing ball 4, make the whole non-deformable of packing ball 4, easily fill up the intracavity with filling, and the airtight air chamber that packing fibre 403 interweaved together and formed then can effectively alleviate the erosion rate of saline and alkaline material, avoid saline and alkaline material to spread fast, entangle fibre 404 or entangle fibre 404 and the stereoplasm burr 503 each other through adjacent packing ball 4 simultaneously and entangle each other between, make the position relatively fixed of packing ball 4, the difficult phenomenon of piling up of 4 large tracts of land sidesway of packing ball that takes place, the protective effect of difficult influence packing ball 4.
Referring to fig. 1 and 5, the corrugated rubber sleeve 3 includes a rubber layer 301, the rubber layer 301 is made of alkali-resistant wear-resistant rubber, the corrosion speed of the corrugated rubber sleeve 3 in the saline-alkali soil is slowed down, a plurality of reinforcing fibers 302 are pre-embedded in the rubber layer 301, the reinforcing fibers 302 are parallel to each other, the reinforcing fibers 302 are axially in the same direction as the corrugated rubber pipe 1, the reinforcing fibers 302 can greatly increase the strength of the rubber layer 301, the rubber layer 301 is not easily broken when the rubber layer 301 does reciprocating elastic movement along the axial direction of the corrugated rubber pipe 1, the outer end of the reinforcing fibers 302 is fixedly connected with a plurality of capillary fibers 303, the plurality of capillary fibers 303 are arranged in a staggered manner, the capillary fibers 303 can increase the toughness of the rubber layer 301, the rubber layer 301 is not easily cracked and falls off from the surface of the rubber layer 301 due to multiple.
Referring to fig. 3 and 6, the inner wall of the corrugated plastic sleeve 3 is fixedly connected with a leakage-proof net 5, the leakage-proof net 5 is sleeved outside a plurality of packing balls 4, the leakage-proof net 5 is used for the net-tucking packing balls 4, when cracks and damages occur on the surface of the corrugated plastic sleeve 3, the packing balls 4 are not necessarily caused to leak, the corrosion resistance of the corrugated expansion joint is not easily affected, the leakage-proof net 5 is formed by weaving a plurality of corrosion-resistant fibers, the corrosion-resistant fibers comprise an elastic rubber tube 501, and the corrosion-resistant fibers are formed by twisting three elastic rubber tubes 501, the toughness of the corrosion-resistant fibers is greatly increased, so that the leakage-proof net 5 is not easily broken, an elastic cavity 502 is drilled in the elastic rubber tube 501, the elastic cavity 502 is filled with high-pressure nitrogen, the elastic cavity 502 can increase the elasticity of the elastic rubber tube 501, the impact resistance of the whole leakage-proof net 5 is increased, and the high-, the toughness of the anti-leakage net 5 is not easily influenced, the surface of the elastic rubber tube 501 is fixedly connected with a plurality of hard burrs 503, the hard burrs 503 are distributed in a staggered manner, the hard burrs 503 and entangled fibers 404 of adjacent filling balls 4 are interwoven and entangled together, and the interwoven and entangled hard burrs 503 and the entangled fibers 404 have a limiting effect, so that the filling balls 4 are not easily displaced in the filling cavity, and the normal anti-corrosion effect of the filling balls 4 is not easily influenced.
The air is filled in the filling ball sleeve 401, so that the air pressure in the filling ball sleeve 401 is slightly higher than the normal atmospheric pressure, the whole body of the filling ball 4 is convenient to shape, the filling ball 4 is not easy to collapse under the action of external force, and the anti-corrosion effect of the filling ball 4 is not easy to influence.
The scheme provides multilayer protection for the corrugated expansion joint, the service life of the corrugated expansion joint is greatly prolonged, firstly, the corrugated rubber sleeve 3 positioned at the outer side is used as the first layer protection of the corrugated expansion joint and directly resists the corrosion of external saline alkali, the reinforcing fibers 302 and the fine fibers 303 laid in the corrugated rubber sleeve 3 can effectively reduce the fracture caused by the elastic deformation of the corrugated rubber sleeve 3, secondly, the filling ball 4 filled in the filling cavity is used as the second layer protection of the corrugated expansion joint, when the corrugated rubber sleeve 3 at the outer layer is cracked or fractured, the filling ball 4 is exposed, due to the effect of the entanglement fibers 404, the filling ball 4 is not easy to generate relative displacement even under the vibration effect caused by the impact of the transport fluid in the corrugated rubber pipe 1 all year round, the uniform mending in the filling cavity is easy, at the moment, the corrosion of the saline alkali substances can be limited relieved by a closed air chamber formed by a plurality of filling fibers 403, the life of extension ripple expansion joint, and at last, be located inboard ripple gum cover 3 and then become the last protective screen of ripple expansion joint, can realize effectively prolonging the life of ripple expansion joint in the saline and alkaline land, reduce the input cost that the relevant infrastructure was administered to the saline and alkaline land by a wide margin, need not to carry out high frequency to the ripple expansion joint and repair and change, the improvement work of the normal saline and alkaline land of difficult influence increases saline and alkaline land improvement efficiency.
The above; is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; according to the technical scheme of the utility model and the improvement conception, equivalent substitution or change is carried out; are all covered by the protection scope of the utility model.
Claims (8)
1. The utility model provides a ripple expansion joint for saline and alkaline land pipe laying, includes ripple rubber tube (1), the equal fixedly connected with connecting terminal (2) in both ends of ripple rubber tube (1), its characterized in that: corrugated hose (1) is including corrugated rubber sleeve (3), it has the packing chamber to open in corrugated rubber sleeve (3), it has a plurality of packing balls (4) to fill intracavity packing, packing ball (4) are including packing ball cover (401), a plurality of skeleton fiber (402) of fixedly connected with in packing ball cover (401), it is a plurality of crisscross distribution journey network structure in packing ball cover (401) skeleton fiber (402), a plurality of packing fiber (403) of fixedly connected with on the outer wall of skeleton fiber (402), it is a plurality of packing fiber (403) are crisscross each other and are entangled together, form a plurality of airtight air chambers, a plurality of entanglement fiber (404) of outside fixedly connected with of packing ball cover (401).
2. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 1, wherein: the corrugated rubber sleeve (3) comprises a rubber layer (301), and the rubber layer (301) is made of alkali-resistant wear-resistant rubber.
3. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 2, wherein: a plurality of reinforcing fibers (302) are embedded in the rubber layer (301), the reinforcing fibers (302) are parallel to each other, and the reinforcing fibers (302) and the corrugated rubber pipe (1) are axially in the same direction.
4. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 3, wherein: the outer end of the reinforced fiber (302) is fixedly connected with a plurality of capillary fibers (303), and the plurality of capillary fibers (303) are arranged in a staggered mode.
5. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 1, wherein: the inner wall of the corrugated rubber sleeve (3) is fixedly connected with an anti-leakage net (5), and the anti-leakage net (5) is sleeved on the outer sides of the plurality of filling balls (4).
6. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 5, wherein: the anti-leakage net (5) is formed by weaving a plurality of corrosion-resistant fibers, the corrosion-resistant fibers comprise elastic rubber tubes (501), and the corrosion-resistant fibers are formed by twisting three elastic rubber tubes (501).
7. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 6, wherein: an elastic cavity (502) is formed in the elastic rubber tube (501) in a chiseled mode, and high-pressure nitrogen is filled in the elastic cavity (502).
8. The corrugated expansion joint for saline-alkali soil pipe laying according to claim 1, wherein: the filling ball sleeve (401) is filled with air, so that the air pressure in the filling ball sleeve (401) is slightly higher than normal atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226467.9U CN212929047U (en) | 2020-02-28 | 2020-02-28 | Corrugated expansion joint for saline-alkali soil pipeline laying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226467.9U CN212929047U (en) | 2020-02-28 | 2020-02-28 | Corrugated expansion joint for saline-alkali soil pipeline laying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212929047U true CN212929047U (en) | 2021-04-09 |
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ID=75297370
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020226467.9U Expired - Fee Related CN212929047U (en) | 2020-02-28 | 2020-02-28 | Corrugated expansion joint for saline-alkali soil pipeline laying |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212929047U (en) |
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2020
- 2020-02-28 CN CN202020226467.9U patent/CN212929047U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20210409 |