CN212657446U - Anti-frost-crack device for pipeline and pipeline - Google Patents
Anti-frost-crack device for pipeline and pipeline Download PDFInfo
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- CN212657446U CN212657446U CN202021802829.0U CN202021802829U CN212657446U CN 212657446 U CN212657446 U CN 212657446U CN 202021802829 U CN202021802829 U CN 202021802829U CN 212657446 U CN212657446 U CN 212657446U
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Abstract
The embodiment of the utility model provides a frost crack prevention device and pipeline of pipeline, include: the outer pipe body is internally provided with a flow channel for medium to flow; an inner tube disposed within the flow channel; the supporting frame is respectively connected with the inner wall of the outer pipe body and the outer wall of the inner pipe body; wherein the inner tube body is provided with an elastic component which can adjust the volume of the flow channel under the action of pressure; the elastic component comprises a silica gel bag arranged inside the inner tube body; the silicone capsule comprises an elastic capsule body arranged in the inner tube body and a capsule body flanging which is connected with the elastic capsule body and is lapped at the end part of the inner tube body. The embodiment of the utility model provides a frost crack prevention device and pipeline of pipeline through set up elastic component on the pipeline, when having realized rivers and freezing, pipeline inside can produce deformation, and then avoids because the frozen problem of splitting of the pipeline that leads to of rivers.
Description
Technical Field
The utility model relates to the technical field of pipelines, especially, relate to a frost crack prevention device and pipeline of pipeline.
Background
In daily life, the safe operation of various domestic water supply pipelines, engineering circulating pipelines and fire-fighting water supply pipelines has vital significance for normal life and safety of people, and has remarkable significance for the operation safety of various industrial water treatment pipelines and various industrial production.
It is known that when the ambient temperature drops below zero in winter, various water supply pipes are subject to icing, and the volume of water increases by about 1/10 in the icing condition, i.e. the volume ratio of water to ice of the same mass is about 10: 11, thus causing the pipe to break. Once the water supply is broken, the operation of various water supplies is affected, the life and safety of people and industrial production are affected, a large amount of maintenance work is caused, property loss is large, and the maintenance is difficult in some cases. In order to prevent the freezing and frost cracking of the pipeline, people often adopt measures such as deep burying of the pipeline, electric heat tracing, heat preservation of the pipeline and the like in various water supply facilities, but a reliable scheme and a technology for properly ensuring that the pipeline is not frost cracked are not found all the time, so that the pipeline is not frost cracked.
In view of this, the present invention is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the embodiment of the utility model provides a frost crack prevention device of pipeline for solve among the prior art rivers freeze the defect that leads to the pipeline frost crack, through set up elastic component on the pipeline, when having realized that rivers freeze, pipeline inside can produce deformation, and then avoid because the frozen problem of the pipeline frost crack that leads to of rivers.
The embodiment of the utility model provides a pipeline is still provided.
According to the utility model discloses frost crack prevention device of pipeline of first aspect embodiment includes:
the outer pipe body is internally provided with a flow channel for medium to flow;
an inner tube disposed within the flow channel;
the supporting frame is respectively connected with the inner wall of the outer pipe body and the outer wall of the inner pipe body;
wherein the inner tube body is provided with an elastic component which can adjust the volume of the flow channel under the action of pressure.
According to an embodiment of the present invention, the elastic assembly comprises a silicone bladder disposed inside the inner tube body;
the silicone capsule comprises an elastic capsule body arranged in the inner tube body and a capsule body flanging which is connected with the elastic capsule body and is lapped at the end part of the inner tube body.
Particularly, through including inside the elastic bag body that sets up of body, the effective absorption of inflation effort when having realized freezing rivers, the turn-ups of bag body set up simultaneously and guaranteed that elastic bag body can and interior body between realize the fixed of relative position, only realize the absorption to the frozen inflation effort of rivers through the elasticity of elastic bag body.
According to an embodiment of the present invention, the elastic assembly comprises two of the silicone capsules; wherein, two silica gel bags are arranged at two ends of the inner tube body.
Particularly, when the setting of two silica gel bags had guaranteed that the internal rivers of outer body are iced, the inflation force that produces when interior body can follow two directions to icing absorbs.
According to the utility model discloses an embodiment still includes: the sealing end cover is arranged at the end part of the inner pipe body;
the sealing end cover is abutted against the end part of the inner pipe body and extrudes the bag body flanging to deform so as to provide pretightening force for the sealing between the elastic bag body and the inner pipe body;
and the sealing end cover is provided with a liquid through hole for feeding water into the elastic bag body.
Particularly, through the cooperation of end cover and interior body terminal surface edge, realize the extrusion to the utricule turn-ups, and then realize the sealed between elasticity utricule and the interior body, avoid rivers to get into from the gap between elasticity utricule and the interior body, and then flow out the outer body and cause the problem that rivers leaked.
According to an embodiment of the present invention, the elastic member further comprises: the first partition plate, the second partition plate and the spring;
the first clapboard is arranged corresponding to the elastic bag body and is in butt fit with the back water side of the elastic bag body;
the second partition plate is fixedly connected with the inner wall of the inner pipe body;
the spring is disposed between the first partition and the second partition.
Particularly, through setting up first baffle and spring, realized the restoring force to the elasticity utricule for rivers receive the bulging force and then produce the elasticity utricule that extends and can realize the shrink under the effect of spring when freezing, and first baffle can slide in the inner tube body simultaneously, has guaranteed the extension of elasticity utricule.
Further, the second baffle makes the elasticity utricule of body both sides including setting up can both receive the restoring force effect of spring, spring one end and first baffle cooperation promptly, and the other end cooperates with the second baffle, through compression spring, realizes the reaction force to elasticity utricule.
The second partition plate is fixedly connected to the inner wall of the inner tube.
It should also be noted that the second partition plate may be disposed in an annular structure on the inner wall of the inner pipe body.
According to an embodiment of the present invention, the elastic member further comprises: a first partition plate and a spring;
the first clapboard is arranged corresponding to the elastic bag body and is in butt fit with the back water side of the elastic bag body;
the spring is arranged between the two first partition plates.
Particularly, through setting up two first baffles and spring, realized the restoring force to the elasticity utricule for rivers receive the bulging force and then produce the elasticity utricule that extends and can realize the shrink under the effect of spring when freezing, and first baffle can slide in the inner tube body simultaneously, has guaranteed the extension of elasticity utricule.
According to an embodiment of the present invention, the support frame is provided with an air passage;
the air channel is used for communicating the outside of the outer tube with the two elastic capsules inside the inner tube;
wherein the air channel is communicated with the two elastic capsules through the tube wall of the inner tube body and the second clapboard.
Particularly, when making the elasticity utricule receive the extrusion to produce deformation through setting up air passage, can extrude the outside of outer body with the internal gas of inner tube, avoid because the internal portion of interior pipe reserves gas and leads to pressure too big, the unable problem of compressing of elasticity utricule.
It should be noted that, in this embodiment, the air channel is connected to the inner space of the inner tube through the support frame for connecting the outer tube and the inner tube, and the connection to the inner space of the inner tube is realized through the second partition plate.
According to an embodiment of the present invention, the support frame is provided with an air passage;
the air channel is used for communicating the outside of the outer tube with the two elastic capsules inside the inner tube;
wherein the air channel is communicated with the two elastic capsules through the tube wall of the inner tube body.
Particularly, when making the elasticity utricule receive the extrusion to produce deformation through setting up air passage, can extrude the outside of outer body with the internal gas of inner tube, avoid because the internal portion of interior pipe reserves gas and leads to pressure too big, the unable problem of compressing of elasticity utricule.
It should be noted that, the air passage in this embodiment is connected with the inner space of the inner pipe body through the support frame for communicating the outer pipe body with the inner pipe body, and is realized by opening an opening on the inner wall of the inner pipe body when being connected with the inner space of the inner pipe body, and the second partition plate is slidably disposed in the inner pipe body.
According to an embodiment of the present invention, the outer tube body comprises: a water inlet joint and a water outlet joint;
the water inlet joint is connected with one side end part of the outer pipe body and is arranged in an open shape with a gradually enlarged radial cross section of a drainage basin from the water inlet flow direction;
the water outlet joint is connected with the end part of the other side of the outer pipe body, and is arranged in a closing-up shape with the gradually reduced radial cross section of a drainage basin from the water outlet flow direction.
Particularly, increase the guide effect to the rivers that get into and flow out outer body, can realize more quick flow, also will intake the rivers of end and realize the reposition of redundant personnel fast in flow channel simultaneously, avoid concentrating in the position that elasticity utricule belonged to, go out the water end and then concentrate other position rivers in flow channel to the position that elasticity utricule was located, and the body is outer to the discharge.
According to the utility model discloses a pipeline of second aspect embodiment includes: the anti-frost-cracking device for the pipeline is described above.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least: the embodiment of the utility model provides a frost crack prevention device and pipeline of pipeline through set up elastic component on the pipeline, when having realized rivers and freezing, pipeline inside can produce deformation, and then avoids because the frozen problem of splitting of the pipeline that leads to of rivers.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic view of an assembly relationship of an anti-frost crack apparatus provided by an embodiment of the present invention;
fig. 2 is a second schematic view of an assembly relationship of the anti-frost crack device provided by the embodiment of the present invention.
Reference numerals:
1. an outer tubular body; 101. a flow channel; 102. a water inlet joint; 103. a water outlet joint;
2. an inner tube body;
3. a support frame; 301. an air passage;
4. a silicone capsule; 401. an elastic bladder body; 402. the bag body is flanged;
5. sealing the end cap; 501. a liquid through hole;
6. a first separator;
7. a second separator;
8. a spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 and fig. 2, a first schematic view and a second schematic view of an assembly relationship of an anti-frost cracking device provided by an embodiment of the present invention are provided. As can be seen from fig. 1 and 2, the present invention has an inner tube 2 inside an outer tube 1, and a silicone bladder 4, a spring 8, a first partition 6, a second partition 7, and the like inside the inner tube 2. When the pipeline water system normally operates, the spring 8 and the silica gel capsule 4 effectively resist the normal pressure of water, and the system operation is not influenced. When the pipeline water system freezes, because the volume increases, the expansion force compresses spring 8 and silica gel capsule 4, effectively absorbs the inflation of volume, prevents the damage of system frost crack. When the pipeline water system is frozen and thawed, the expansion force of ice disappears, and the spring 8 and the silica gel capsule 4 are restored to the original state under the action of the elasticity of the spring. Because at the in-process that freezes, always in the pipeline firstly in the excircle freeze, progressively inwards expand, consequently this device sets up telescopic space in central point, has the rationality, protects whole pipeline, avoids bursting because of freezing.
Generally speaking, the utility model discloses simple to operate can be with the friendly cooperation of various water supply pipe. Set up the heat preservation simultaneously in the outside of water supply connector 102, water connectors 103 and outer body 1, make the utility model provides a prevent frostbite and split the device when being connected with other pipelines, can obtain good heat insulating ability.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In some embodiments of the present invention, as shown in fig. 1 and 2, the present embodiment provides an anti-frost crack apparatus for a pipeline, including: the outer tube body 1, a medium flowing channel 101 is formed in the outer tube body 1; an inner tube 2 disposed in the flow channel 101; the support frame 3 is respectively connected with the inner wall of the outer pipe body 1 and the outer wall of the inner pipe body 2; wherein the inner tube 2 is provided with an elastic component, which is capable of adjusting the volume of the flow channel 101 under the action of pressure.
The embodiment of the utility model provides a frost crack prevention device of pipeline through set up elastic component on the pipeline, when having realized rivers and freezing, pipeline inside can produce deformation, and then avoids because the frozen problem of splitting of the pipeline that leads to of rivers.
In some embodiments, the elastic assembly comprises a silicone bladder 4 disposed inside the inner tube 2; the silicone capsule 4 comprises an elastic capsule body 401 arranged inside the inner tube body 2 and a capsule body flanging 402 connected with the elastic capsule body 401 and overlapped at the end part of the inner tube body 2.
Particularly, through including inside elastic balloon 401 that sets up of body 2, realized the effective absorption of the expanding force when freezing to rivers, simultaneously balloon turn-ups 402 set up guaranteed elastic balloon 401 can with interior body 2 between realize the fixed of relative position, only realize the absorption to the frozen expanding force of rivers through elastic balloon 401's elasticity.
In some embodiments, the elastic assembly comprises two silicone capsules 4; wherein, two silica gel capsules 4 are arranged at two ends of the inner tube body 2.
Particularly, when the water flow in the outer tube body 1 is frozen, the inner tube body 2 can absorb the expansion force generated in the freezing process from two directions due to the arrangement of the two silica gel capsules 4.
In some embodiments, further comprising: a sealing end cap 5 arranged at the end of the inner pipe body 2; the sealing end cover 5 is abutted against the end part of the inner pipe body 2 and extrudes the bag body flanging 402 to generate deformation so as to provide pretightening force for the sealing between the elastic bag body 401 and the inner pipe body 2; the sealing end cap 5 is provided with a liquid through hole 501 for feeding water into the elastic balloon 401.
Particularly, through the cooperation of end cover 5 and interior body 2 terminal surface edge, realize the extrusion to utricule turn-ups 402, and then realize the sealed between elasticity utricule 401 and the interior body 2, avoid rivers to get into from the gap between elasticity utricule 401 and the interior body 2, and then flow out outer body 1 and cause the problem that rivers leak.
In some embodiments, the resilient assembly further comprises: a first partition 6, a second partition 7, and a spring 8; the first clapboard 6 is arranged corresponding to the elastic capsule 401 and is abutted and matched with the back water side of the elastic capsule 401; the second clapboard 7 is fixedly connected with the inner wall of the inner pipe body 2; the spring 8 is disposed between the first partition 6 and the second partition 7.
Particularly, through setting up first baffle 6 and spring 8, realized the restoring force to elasticity utricule 401 for receive the bulging force and then produce the elasticity utricule 401 of extension when rivers freeze and can realize the shrink under spring 8's effect, body 2 slides including first baffle 6 can simultaneously, has guaranteed the extension of elasticity utricule 401.
Further, the second baffle 7 makes the elasticity utricule 401 that sets up body 2 both sides can both receive spring 8's restoring force effect including, spring 8 one end cooperates with first baffle 6 promptly, and the other end cooperates with second baffle 7, through compression spring 8, realizes the reaction force to elasticity utricule 401.
The second partition 7 is fixedly connected to the inner wall of the inner pipe 2.
It should also be noted that the second partition 7 may be provided as an annular structure on the inner wall of the inner tube 2.
In some embodiments, the resilient assembly further comprises: a first partition 6 and a spring 8; the first clapboard 6 is arranged corresponding to the elastic capsule 401 and is abutted and matched with the back water side of the elastic capsule 401; the spring 8 is disposed between the two first partition plates 6.
Particularly, through setting up two first baffles 6 and spring 8, realized the restoring force to elasticity utricule 401 for receive the bulging force and then produce the elasticity utricule 401 of extension when rivers freeze and can realize the shrink under spring 8's effect, first baffle 6 can slide in body 2 including simultaneously, has guaranteed the extension of elasticity utricule 401.
In some embodiments, the support frame 3 is provided with an air channel 301; the air channel 301 connects the outside of the outer tube 1 with the two elastic bladders 401 inside the inner tube 2; wherein the air channel 301 communicates with the two elastic bladders 401 through the inner wall of the inner tube 2 and the second partition 7.
Particularly, make elasticity utricule 401 receive the extrusion to produce when deforming through setting up air channel 301, can extrude the outside of outer body 1 with the gas in interior body 2, avoid because interior body 2 is inside to be persisted and to have gas to lead to pressure too big, the unable compressed problem of elasticity utricule 401.
It should be noted that the air channel 301 of the present embodiment is connected to the inner space of the inner tube 2 through the support frame 3 connecting the outer tube 1 and the inner tube 2, and the connection to the inner space of the inner tube 2 is realized through the second partition 7.
It should also be noted that the gap that starts to communicate with the air channel 301 in the middle of the second partition 7 enables the space communication with the two elastic bladders 401 through the second partition 7.
In some embodiments, the support frame 3 is provided with an air channel 301; the air channel 301 connects the outside of the outer tube 1 with the two elastic bladders 401 inside the inner tube 2; wherein the air channel 301 is in communication with the two elastic bladders 401 through the wall of the inner tube 2.
Particularly, make elasticity utricule 401 receive the extrusion to produce when deforming through setting up air channel 301, can extrude the outside of outer body 1 with the gas in interior body 2, avoid because interior body 2 is inside to be persisted and to have gas to lead to pressure too big, the unable compressed problem of elasticity utricule 401.
It should be noted that, in this embodiment, the air channel 301 is connected to the inner space of the inner tube 2 through the support frame 3 communicating the outer tube 1 and the inner tube 2, and is connected to the inner space of the inner tube 2 through an opening formed on the inner wall of the inner tube 2, and the second partition 7 is slidably disposed in the inner tube 2.
In some embodiments, the outer body 1 comprises: a water inlet joint 102 and a water outlet joint 103; the water inlet joint 102 is connected with one side end part of the outer pipe body 1 and is arranged in an open shape with gradually enlarged cross section in the radial direction of a drainage basin from the water inlet flow direction; the water outlet joint 103 is connected with the other end part of the outer pipe body and is arranged in a closing-up shape with the gradually reduced radial cross section of a drainage basin from the water outlet flow direction.
Specifically, the guiding effect of the water flow entering and flowing out of the outer tube body 1 is increased, so that faster flow can be realized, and meanwhile, the water flow at the water inlet end is quickly divided in the flow channel 101, so that the water flow is prevented from being concentrated at the position of the elastic bag body 401, and the water outlet end concentrates the water flow at other parts in the flow channel 101 at the position of the elastic bag body 401 and discharges the water out of the outer tube body 1.
In some embodiments of the present invention, there is provided a pipe, including: the anti-frost-cracking device for the pipeline is described above.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.
Claims (10)
1. An anti-freeze-cracking device for a pipeline, comprising:
the outer pipe body is internally provided with a flow channel for medium to flow;
an inner tube disposed within the flow channel;
the supporting frame is respectively connected with the inner wall of the outer pipe body and the outer wall of the inner pipe body;
wherein the inner tube body is provided with an elastic component which can adjust the volume of the flow channel under the action of pressure.
2. The apparatus of claim 1,
the elastic component comprises a silica gel bag arranged inside the inner tube body;
the silicone capsule comprises an elastic capsule body arranged in the inner tube body and a capsule body flanging which is connected with the elastic capsule body and is lapped at the end part of the inner tube body.
3. The device for preventing frost cracking of a pipeline according to claim 2, wherein the elastic assembly comprises two silicone capsules; wherein, two silica gel bags are arranged at two ends of the inner tube body.
4. The apparatus of claim 2, further comprising: the sealing end cover is arranged at the end part of the inner pipe body;
the sealing end cover is abutted against the end part of the inner pipe body and extrudes the bag body flanging to deform so as to provide pretightening force for the sealing between the elastic bag body and the inner pipe body;
and the sealing end cover is provided with a liquid through hole for feeding water into the elastic bag body.
5. The apparatus of claim 3, wherein the resilient assembly further comprises: the first partition plate, the second partition plate and the spring;
the first clapboard is arranged corresponding to the elastic bag body and is in butt fit with the back water side of the elastic bag body;
the second partition plate is fixedly connected with the inner wall of the inner pipe body;
the spring is disposed between the first partition and the second partition.
6. The apparatus of claim 3, wherein the resilient assembly further comprises: a first partition plate and a spring;
the first clapboard is arranged corresponding to the elastic bag body and is in butt fit with the back water side of the elastic bag body;
the spring is arranged between the two first partition plates.
7. The device for preventing frost cracking of a pipeline according to claim 5, wherein the support frame is provided with an air passage;
the air channel is used for communicating the outside of the outer tube with the two elastic capsules inside the inner tube;
wherein the air channel is communicated with the two elastic capsules through the tube wall of the inner tube body and the second clapboard.
8. The frost crack prevention device for pipes of claims 3 to 6, wherein the support frame is provided with an air channel;
the air channel is used for communicating the outside of the outer tube with the two elastic capsules inside the inner tube;
wherein the air channel is communicated with the two elastic capsules through the tube wall of the inner tube body.
9. The apparatus of any one of claims 1 to 6, wherein the outer body comprises: a water inlet joint and a water outlet joint;
the water inlet joint is connected with one side end part of the outer pipe body and is arranged in an open shape with a gradually enlarged radial cross section of a drainage basin from the water inlet flow direction;
the water outlet joint is connected with the end part of the other side of the outer pipe body, and is arranged in a closing-up shape with the gradually reduced radial cross section of a drainage basin from the water outlet flow direction.
10. A duct, comprising: an apparatus for preventing frost cracking of a pipe as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021802829.0U CN212657446U (en) | 2020-08-25 | 2020-08-25 | Anti-frost-crack device for pipeline and pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021802829.0U CN212657446U (en) | 2020-08-25 | 2020-08-25 | Anti-frost-crack device for pipeline and pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212657446U true CN212657446U (en) | 2021-03-05 |
Family
ID=74769900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021802829.0U Expired - Fee Related CN212657446U (en) | 2020-08-25 | 2020-08-25 | Anti-frost-crack device for pipeline and pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212657446U (en) |
-
2020
- 2020-08-25 CN CN202021802829.0U patent/CN212657446U/en not_active Expired - Fee Related
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