CN210152651U - Leakage-proof refrigerating device for freezing method construction - Google Patents
Leakage-proof refrigerating device for freezing method construction Download PDFInfo
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- CN210152651U CN210152651U CN201920917745.2U CN201920917745U CN210152651U CN 210152651 U CN210152651 U CN 210152651U CN 201920917745 U CN201920917745 U CN 201920917745U CN 210152651 U CN210152651 U CN 210152651U
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Abstract
The utility model discloses a leakage-proof refrigerating device for freezing method construction, which comprises a freezer and a water supply pipe which are connected in sequence to form a loop, establish ties freezing pipeline and wet return, establish ties freezing pipeline including can insert locate in the soil body with many cryovials of freezing soil body and the many series connection pipes that are used for establishing ties each cryovial, the equal both ends of each cryovial are sealed and first end seal on seted up first connector and second connector, first connector is connected with wears to locate in the cryovial and extends to stretching into the pipe of cryovial second end, series connection union coupling is between the second connector of preceding cryovial and the first connector of a back cryovial, the first connector and the delivery piping connection of head end cryovial, the second connector and the wet return of tail end cryovial are connected, be equipped with the bypass subassembly that can cut off arbitrary cryovial of arbitrary cryovial and make other cryovials continue the series connection between delivery pipe and the wet return. The device can keep normal work of the freezing pipe, continue the construction progress, improve the frozen soil strength and prevent catastrophic accidents.
Description
Technical Field
The utility model relates to a freeze construction technical field, especially relate to a freezing method construction is with separating hourglass formula refrigerating plant.
Background
Since the birth of the construction technology of the freezing method, the freezing method has the outstanding advantages of strong impermeability, high strength of the frozen soil body, environmental protection, no pollution and the like, and is widely applied to engineering construction of subways, deep foundation pits, mines and the like.
Presently, freezing pipe breakage and brine loss can occur during both active freezing and excavation. There are several causes for freezing tube breakage or leakage: firstly, the pipe is subject to cold shrinkage deformation after the pipe is unfrozen, so that the joint welding seam is cracked and leaked; secondly, the deformation of the frozen wall after excavation causes the bending and stretching of the frozen pipe, which leads to the fracture of the frozen pipe joint; thirdly, the repair welding quality of the freezing pipe threaded connection or the installation quality of the freezing pipe end plug has defects, the pressing leakage test is not strict enough, and the freezing pipe joint or the freezing pipe end plug leaks during water supply; fourthly, stratum disturbance, tunnel settlement and the like caused by drilling and freezing; fifthly, in the later stage of frozen hole construction, due to the fact that stratum disturbance is increased and permeability is improved, hole collapse and hole holding are easily caused, and the possibility of the situation and the difficulty in handling the situation are obviously increased. After the freezing pipe is broken, the salt water leaks, so that the freezing pipe can not work normally, and the frozen wall can be melted or the strength of the frozen soil is reduced. Particularly, when a water-containing sand layer with higher underground water pressure is encountered, drilling, water leakage and sand blasting are frequently carried out on a nearly horizontal freezing hole during construction, the treatment is not timely, serious stratum settlement can be caused, and the tunnel lining, the duct piece and the ground building are deformed and damaged and even cause a catastrophic accident of tunnel collapse.
Often establish ties many cryovials during water supply, it is less for guaranteeing along journey resistance loss, stretch into the pipeline pipe diameter of cryovial little than the cryovial pipe diameter, hardly keep in position placed in the middle, lean on to certain one side of cryovial when stretching into the pipeline (stretching into the pipeline of cryovial), the relative opposite side of this side frozen water flow is little a lot, has aggravated the inhomogeneous of freezing speed in the radial plane of cryovial. The surface of the freezing pipe is in contact with rock soil for heat exchange, and the heat exchange coefficient is small; the convection heat exchange between the inner surface of the freezing pipe and cold water is realized, the cold water flow speed is low, the heat exchange area is limited, and the cooling speed is extremely low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide one kind can keep freezing the pipe and normally work, continue the construction progress, improve frozen soil intensity and prevent the freezing method construction of catastrophic occurence of failure and use at a distance from hourglass formula refrigerating plant.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a leakage-proof refrigerating device for freezing method construction comprises a refrigerator, a water supply pipe, a series-connected refrigerating pipeline and a water return pipe which are connected in sequence to form a loop, the series freezing pipeline comprises a plurality of freezing pipes which can be inserted into the soil body to freeze the soil body and a plurality of series pipes which are used for connecting the freezing pipes in series, both ends of each freezing pipe are sealed, the seal of the first end is provided with a first connecting port and a second connecting port, the first connecting port is connected with an extending pipe which is arranged in the freezing pipe in a penetrating way and extends to the second end of the freezing pipe, the serial pipe is connected between the second connecting port of the front freezing pipe and the first connecting port of the rear freezing pipe, the first connecting port of the head-end freezing pipe is connected with the water supply pipe, the second connecting port of the tail-end freezing pipe is connected with the water return pipe, and a bypass assembly capable of separating any freezing pipe and enabling other freezing pipes to be continuously connected in series is arranged between the water supply pipe and the water return pipe.
As a further improvement of the above technical solution:
the bypass assembly comprises a bypass pipe, a connecting pipe, a first valve and a second valve, one end of the bypass pipe is connected with the water supply pipe, the other end of the bypass pipe is connected with the water return pipe, each series pipe is connected with the bypass pipe through the connecting pipe, the first valve is arranged on the bypass pipe on two sides of each connecting pipe, and the second valve is arranged on each series pipe on two sides of the connecting pipe connected with the series pipe, on the water supply pipe between the bypass pipe and the head end freezing pipe and on the water return pipe between the bypass pipe and the tail end freezing pipe.
The second valve is a three-way valve.
The first valve is a two-way valve.
And spiral fins are arranged between the outer wall of the extension pipe and the inner wall of the freezing pipe.
The spiral fins are spirally arranged around the outer wall of the extension pipe, and the central axes of the extension pipe, the freezing pipe and the spiral fins are overlapped.
The spiral fins are fixedly arranged on the freezing pipe.
The spiral rib is fixedly arranged on the extending pipe.
One end of the extending pipe, which is close to the second end of the freezing pipe, is provided with an inclined opening.
Compared with the prior art, the utility model has the advantages of:
the leakage-proof refrigerating device for freezing method construction of the utility model comprises a freezer and a water supply pipe which are connected in sequence to form a loop, establish ties freezing pipeline and wet return, establish ties freezing pipeline including can insert locate in the soil body with many cryovials of freezing soil body and the many series connection pipes that are used for establishing ties each cryovial, the equal both ends of each cryovial are sealed and first end seal on seted up first connector and second connector, first connector is connected with wears to locate in the cryovial and extends to stretching into the pipe of cryovial second end, series connection union coupling is between the second connector of preceding cryovial and the first connector of a back cryovial, the first connector and the delivery piping connection of head end cryovial, the second connector and the wet return of tail end cryovial are connected, be equipped with the bypass subassembly that can cut off arbitrary cryovial of arbitrary cryovial and make other cryovials continue the series connection between delivery pipe and the wet return. The leakage-proof refrigerating device for freezing method construction can cut off a leaked refrigerating pipe through the bypass assembly, and keep the cold water supply of other refrigerating pipes in the same flow with the leaked refrigerating pipe, namely, other refrigerating pipes are continuously connected in series so as to continuously refrigerate the soil body. During the use, all cryovial intervals are buried underground in the soil body, the cryovial that the front and back is adjacent communicates through the series connection pipe in order to form series connection freezing pipeline, the first interface connection of delivery pipe and head end cryovial is passed through to the play water end of freezer, the second interface connection of wet return and tail end cryovial is passed through to the return water end of freezer, cold water in the freezer passes through the delivery pipe and gets into the cryovial, wherein cold water gets into the cryovial along stretching into the pipe, then flow to the top of cryovial by the bottom of cryovial along the space between cryovial and the delivery pipe again, along journey absorbed heat, under the condition that the leakage appears in arbitrary cryovial in series connection freezing pipeline, cut off this leaked cryovial through the bypass subassembly, so as to reach following effect: cold water is prevented from being continuously discharged from the leaked freezing pipe to enter the soil body, so that the frozen soil body is unfrozen, the freezing and solidifying temperature of the soil body is reduced, and the strength of frozen soil is improved; the phenomena of water leakage, sand blasting, stratum settlement, ground building deformation, tunnel collapse and the like are prevented, namely catastrophic accidents are prevented, and the use safety performance is improved. Meanwhile, other freezing pipes are connected in series continuously, so that the soil body is kept or continued to be frozen, namely the normal work and the construction progress of the freezing pipes are kept.
Further, the utility model discloses freezing method construction is with leaking formula refrigerating plant sets up the spiral fin between the inner wall that stretches into the outer wall of pipe and cryovial, very big increase the area of contact of cryovial inside with cold water, heat transfer area has been increased promptly, the flow of pipeline axis direction is followed with cold water to the spiral fin, the change is for flowing around the axis, very big increase flow length, the while aggravates the turbulent state of cold water flow process, the cryovial heat transfer coefficient has greatly been improved, make this freezing method construction with refrigerating plant's cooling efficiency high, the cooling effect is good.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of a leakage-proof type freezing apparatus for freezing method construction according to the present invention.
Fig. 2 is a schematic cross-sectional view of a freezing pipe in the first embodiment of the leakage-proof freezing device for freezing method construction of the present invention.
Fig. 3 is a schematic perspective view of a freezing pipe in the first embodiment of the leakage-proof freezing device for freezing method construction of the present invention.
FIG. 4 is a schematic structural view of a second embodiment of the leakage-proof type refrigerating apparatus for freezing method construction according to the present invention.
Fig. 5 is a schematic cross-sectional view of a freezing pipe in the second embodiment of the leakage-proof freezing device for freezing method construction of the present invention.
Fig. 6 is a schematic perspective view of the leakage-proof refrigerating apparatus for freezing method of the present invention, in which the spiral fins are fixed on the extension pipe.
The reference numerals in the figures denote:
1. a freezer; 2. a water supply pipe; 3. serially connecting freezing pipelines; 31. a freezing pipe; 311. a first connection port; 312. a second connection port; 313. extending the tube; 314. an angled port; 32. a pipe is connected in series; 33. spiral ribs; 34. a sealing block; 4. a water return pipe; 5. a soil body; 7. a bypass assembly; 71. a bypass pipe; 72. a connecting pipe; 73. a first valve; 74. a second valve.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
The first embodiment is as follows:
as shown in fig. 1 to 3, the leakage-blocking type freezing apparatus for freezing method construction of the present embodiment includes a freezer 1, a water supply pipe 2, a series freezing pipeline 3 and a water return pipe 4 which are connected in sequence to form a loop, the series freezing pipeline 3 includes a plurality of freezing pipes 31 which can be inserted into a soil 5 to freeze the soil 5 and a plurality of series pipes 32 for connecting the freezing pipes 31 in series, each freezing pipe 31 has a first connection port 311 and a second connection port 312 which are sealed at both ends and opened at a first end, the first connection port 311 is connected to an extension pipe 313 which is inserted into the freezing pipe 31 and extends to a second end of the freezing pipe 31, the series pipes 32 are connected between the second connection port 312 of the previous freezing pipe 31 and the first connection port 311 of the next freezing pipe 31, the first connection port 311 of the first end freezing pipe 31 is connected to the water supply pipe 2, the second connection port 312 of the tail end freezing pipe 31 is connected to the water return pipe 4, a bypass assembly 7 capable of blocking any freezing pipe 31 and continuously connecting other freezing pipes 31 in series is arranged between the water supply pipe 2 and the water return pipe 4. In the structure, the two ends of the freezing pipe 31 are respectively provided with the sealing block 34, the extending pipe 313 is separated from the second end of the freezing pipe 31 by a certain distance, the first connecting port 311 and the second connecting port 312 are respectively arranged on the sealing blocks 34, the leakage-proof type freezing device for freezing method construction can cut off the leaked freezing pipe 31 through the bypass assembly 7, and the cold water supply of other freezing pipes 31 which have the same flow with the leaked freezing pipe 31 is kept, namely other freezing pipes 31 are continuously connected in series to continuously freeze the soil body 5. When the refrigerating device is used, all the refrigerating pipes 31 are embedded in the soil body 5 at intervals, the refrigerating pipes 31 adjacent in front and back are communicated through the series-connected pipes 32 to form a series refrigerating pipeline 3, the water outlet end of the freezer 1 is connected with the first connecting port 311 of the head-end refrigerating pipe 31 through the water supply pipe 2, the water return end of the freezer 1 is connected with the second connecting port 312 of the tail-end refrigerating pipe 31 through the water return pipe 4, cold water in the freezer 1 enters the refrigerating pipe 31 through the water supply pipe 2, wherein the cold water enters the refrigerating pipe 31 along the extending pipe 313, then flows from the bottom of the refrigerating pipe 31 to the top of the refrigerating pipe 31 along the space between the refrigerating pipe 31 and the water supply pipe 2, absorbs heat along the way, and under the condition that any refrigerating pipe 31 in the series refrigerating pipeline 3 leaks, the leaked refrigerating pipe 31 is blocked through the bypass component 7, so as to achieve the: cold water is prevented from being continuously discharged from the leaked freezing pipe 31 to enter the soil body 5, so that the frozen soil body 5 is unfrozen, the freezing and solidifying temperature of the soil body 5 is reduced, and the frozen soil strength is improved; the phenomena of water leakage, sand blasting, stratum settlement, ground building deformation, tunnel collapse and the like are prevented, namely catastrophic accidents are prevented, and the use safety performance is improved. Meanwhile, other freezing pipes 31 are connected in series continuously, so that the soil body 5 is kept or continued to be frozen, namely the normal work and the construction progress of the freezing pipes 31 are kept.
In this embodiment, the bypass assembly 7 includes a bypass pipe 71, a connecting pipe 72, a first valve 73 and a second valve 74, one end of the bypass pipe 71 is connected to the water supply pipe 2, and the other end is connected to the water return pipe 4, each serial pipe 32 is connected to the bypass pipe 71 through a connecting pipe 72, the bypass pipe 71 is provided with a first valve 73 on both sides of each connecting pipe 72, and each serial pipe 32 is provided with a second valve 74 on both sides of the connecting pipe 72 connected thereto, on the water supply pipe 2 between the bypass pipe 71 and the head-end freezing pipe 31, and on the water return pipe 4 between the bypass pipe 71 and the tail-end freezing pipe 31. When any freezing pipe 31 leaks, the second valves 74 at the water inlet end and the water outlet end of the freezing pipe 31 are closed, so that the freezing pipe 31 is isolated from the original series-connected freezing pipeline 3, cold water is prevented from continuously entering the freezing pipe 31, and meanwhile, the first valve 73 between the water supply pipe 2 at the water inlet end of the freezing pipe 31 or the connecting pipe 72 on the series-connected pipe 32 at the water outlet end of the freezing pipe 31 and the connecting pipe 72 or the water return pipe 4 on the series-connected pipe 32 at the water outlet end of the freezing pipe 31 is opened, if the freezing pipe 31 is the head end freezing pipe 31, the first valve 73 between the water supply pipe 2 and the connecting pipe 72 on the series-connected pipe 32 at the water outlet end of the freezing pipe 31 is; if the freezing pipe 31 is the tail end freezing pipe 31, opening a first valve 73 between a connecting pipe 72 on a serial pipe 32 at the water inlet end of the freezing pipe 31 and a water return pipe 4; if the freezing pipe 31 is the middle freezing pipe 31, opening a first valve 73 between a connecting pipe 72 on a series pipe 32 at the water inlet end of the freezing pipe 31 and a connecting pipe 72 on a series pipe 32 at the water outlet end of the freezing pipe 31; at the same time, the other first valves 73 are kept closed, i.e. the other freezing pipes 31 are connected in series continuously so as to continuously freeze the soil 5.
In this embodiment, the second valve 74 is a three-way valve. When any freezing pipe 31 leaks, the three-way valves at the water inlet end and the water outlet end of the freezing pipe 31 can be used for blocking the water inlet and the water outlet of the freezing pipe 31, the inlet and the outlet of the freezing pipe 31 are both communicated with the outside, then liquid nitrogen is introduced into the freezing pipe 31 through any three-way valve, the cold water in the freezing pipe 31 is discharged, and meanwhile, the soil body 5 around the freezing pipe 31 is kept or continued to be frozen continuously.
In this embodiment, the first valve 73 is a two-way valve, and the two-way valve is a conventional component, so that the material selection is convenient and the cost is low.
In this embodiment, an inclined port 314 is disposed at an end of the extending pipe 313 near the second end of the freezing pipe 31, so that water in the extending pipe 313 can flow in and out conveniently.
Example two:
as shown in fig. 4 and 5, in the second embodiment of the leak-proof type freezing apparatus for freezing method construction, in addition to the first embodiment, a spiral fin 33 is provided between the outer wall of the insertion pipe 313 and the inner wall of the freezing pipe 31. In this structure, the very big increase of spiral fin 33 freezing pipe 31 inside with the area of contact of cold water, heat transfer area has been increased promptly, spiral fin 33 is with cold water along the flow of pipeline axis direction, the change is for flowing around the axis, very big increase flow length, the while aggravates the turbulent state of cold water flow process, has greatly improved freezing pipe 31 heat transfer coefficient for this freezing method construction is with leaking the formula refrigerating plant's that separates cooling efficiency is high, the cooling effect is good.
In this embodiment, spiral fin 33 spirals around the outer wall that stretches into pipe 313 and sets up, and stretch into pipe 313, cryovial 31 and the coincidence of spiral fin 33 three's center pin, cold water has been made to keep evenly at cryovial 31 radial plane flow, the homogeneity of cryovial 31 radial plane cooling rate has been guaranteed, and simultaneously, in the assembling process, spiral fin 33 has radial spacing and axial direction's effect to stretching into pipe 313, it is very easy to make to stretch into pipe 313, the counter shaft assembly of cryovial 31 and spiral fin 33 three, keep stretching into the position placed in the middle of pipe 313 in cryovial 31 easily, prevent to stretch into pipe 313 and lean on to certain one side of cryovial 31.
In this embodiment, the outer side of the spiral rib 33 is fixed on the freezing pipe 31, and the inner side of the spiral rib 33 is in contact with but not fixed to the extending pipe 313. Assembling process of freezing pipe 31: inserting the spiral fin 33 into the inner cavity of the freezing pipe 31, making the spiral fin 33 coaxial with the freezing pipe 31, and both ends of the spiral fin 33 located in the inner cavity of the freezing pipe 31, then welding both ends of the spiral fin 33 with the inner wall of the freezing pipe 31, then sealing the bottom end of the freezing pipe 31, and then processing the sealing block 34 at the top end of the freezing pipe 31, and opening the first connector 311 and the second connector 312 on the sealing block 34 at the top end of the freezing pipe 31, wherein the first connector 311 is located at the center position of the sealing block 34 at the top end of the freezing pipe 31, then connecting the top end of the extension pipe 313 to the first connector 311, then inserting the extension pipe 313 into the center space of the spiral fin 33, and finally fixing the sealing block 34 at the top end of the freezing pipe 31, thereby completing the assembly of the freezing pipe 31.
Example three:
as shown in fig. 6, the leakage preventing type freezing apparatus for freezing method construction according to the third embodiment has the same structure as the second embodiment except that the fixing positions of the spiral fins 33 are different, in this embodiment, the inner sides of the spiral fins 33 are fixed to the extension pipe 313, and the outer sides of the spiral fins 33 are not fixed but in contact with the freezing pipe 31. Compared with the first embodiment, the assembly process of the spiral rib 33 fixedly arranged on the extending pipe 313 is more convenient and reasonable, and the assembly process of the freezing pipe 31 is as follows: firstly, sealing the bottom end of the freezing pipe 31, processing the sealing block 34 at the top end of the freezing pipe 31, arranging a first connecting port 311 and a second connecting port 312 on the sealing block 34 at the top end of the freezing pipe 31, wherein the first connecting port 311 is positioned at the central position of the sealing block 34 at the top end of the freezing pipe 31, then connecting the top end of the extending pipe 313 to the first connecting port 311, then spiraling and fixing the spiral fins 33 on the outer wall of the extending pipe 313, then inserting the extending pipe 313 with the spiral fins 33 into the inner cavity of the freezing pipe 31, and finally fixing the sealing block 34 at the top end of the freezing pipe 31, thereby completing the assembly of the freezing pipe 31.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a freezing method construction is with separating hourglass formula refrigerating plant which characterized in that: comprises a freezer (1), a water supply pipe (2), a series freezing pipeline (3) and a water return pipe (4) which are sequentially connected to form a loop, wherein the series freezing pipeline (3) comprises a plurality of freezing pipes (31) which can be inserted into a soil body (5) to freeze the soil body (5) and a plurality of series pipes (32) which are used for serially connecting the freezing pipes (31), both ends of each freezing pipe (31) are sealed, a first connecting port (311) and a second connecting port (312) are arranged on the seal of the first end, the first connecting port (311) is connected with an extending pipe (313) which is arranged in the freezing pipe (31) in a penetrating way and extends to the second end of the freezing pipe (31), the series pipes (32) are connected between the second connecting port (312) of the previous freezing pipe (31) and the first connecting port (311) of the next freezing pipe (31), the first connecting port (311) of the first freezing pipe (31) is connected with the water supply pipe (2), and a second connecting port (312) of the tail-end freezing pipe (31) is connected with the water return pipe (4), and a bypass assembly (7) which can partition any freezing pipe (31) and enable other freezing pipes (31) to be continuously connected in series is arranged between the water supply pipe (2) and the water return pipe (4).
2. The leak-proof freezing apparatus for freezing construction according to claim 1, wherein: the bypass assembly (7) comprises a bypass pipe (71), a connecting pipe (72), a first valve (73) and a second valve (74), one end of the bypass pipe (71) is connected with the water supply pipe (2), the other end of the bypass pipe is connected with the water return pipe (4), each series pipe (32) is connected with the bypass pipe (71) through the connecting pipe (72), the first valve (73) is arranged on the two sides of each connecting pipe (72) on the bypass pipe (71), and the second valve (74) is arranged on each series pipe (32) on the two sides of the connecting pipe (72) connected with the series pipe, between the bypass pipe (71) and the head-end freezing pipe (31) on the water supply pipe (2) and between the bypass pipe (71) and the tail-end freezing pipe (31) on the water return pipe (4).
3. The leak-proof freezing apparatus for freezing construction according to claim 2, wherein: the second valve (74) is a three-way valve.
4. The leakage-proof type freezing device for freezing method construction according to claim 3, wherein: the first valve (73) is a two-way valve.
5. The leak-proof freezing apparatus for freezing construction according to any one of claims 1 to 4, wherein: spiral ribs (33) are arranged between the outer wall of the extension pipe (313) and the inner wall of the freezing pipe (31).
6. The leakage-proof type freezing device for freezing method construction according to claim 5, wherein: the spiral ribs (33) are spirally arranged around the outer wall of the extending pipe (313), and the central axes of the extending pipe (313), the freezing pipe (31) and the spiral ribs (33) are overlapped.
7. The leakage-proof type freezing device for freezing method construction according to claim 6, wherein: the spiral ribs (33) are fixedly arranged on the freezing pipe (31).
8. The leakage-proof type freezing device for freezing method construction according to claim 6, wherein: the spiral rib (33) is fixedly arranged on the extending pipe (313).
9. The leak-proof freezing apparatus for freezing construction according to any one of claims 6 to 8, wherein: an inclined opening (314) is formed in one end, close to the second end of the freezing pipe (31), of the extending pipe (313).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920917745.2U CN210152651U (en) | 2019-06-18 | 2019-06-18 | Leakage-proof refrigerating device for freezing method construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920917745.2U CN210152651U (en) | 2019-06-18 | 2019-06-18 | Leakage-proof refrigerating device for freezing method construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159273A (en) * | 2019-06-18 | 2019-08-23 | 中国水利水电第八工程局有限公司 | It is a kind of with flowing to the construction freezing method of handoff functionality with every leaky refrigerating plant |
| CN110185450A (en) * | 2019-06-18 | 2019-08-30 | 中国水利水电第八工程局有限公司 | Construction freezing method is with every leaky refrigerating plant |
-
2019
- 2019-06-18 CN CN201920917745.2U patent/CN210152651U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159273A (en) * | 2019-06-18 | 2019-08-23 | 中国水利水电第八工程局有限公司 | It is a kind of with flowing to the construction freezing method of handoff functionality with every leaky refrigerating plant |
| CN110185450A (en) * | 2019-06-18 | 2019-08-30 | 中国水利水电第八工程局有限公司 | Construction freezing method is with every leaky refrigerating plant |
| CN110159273B (en) * | 2019-06-18 | 2024-05-14 | 中国水利水电第八工程局有限公司 | Leakage-proof type refrigerating device with flow direction switching function for freezing method construction |
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