CN109826182A - The liquid nitrogen freezer and construction method of partition are had on a kind of freezing pipe - Google Patents
The liquid nitrogen freezer and construction method of partition are had on a kind of freezing pipe Download PDFInfo
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- CN109826182A CN109826182A CN201910093943.6A CN201910093943A CN109826182A CN 109826182 A CN109826182 A CN 109826182A CN 201910093943 A CN201910093943 A CN 201910093943A CN 109826182 A CN109826182 A CN 109826182A
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- pipe
- partition
- freezing
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- supply pipe
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Liquid nitrogen freezer and construction method with partition on a kind of freezing pipe carry out water shutoff to the freeze section soil body in rapid rescue construction freezing method and reinforce to use.It is made of freezing pipe joint, liquid supply pipe and escape pipe, freezing pipe joint is welded by two-period freezing pipe and annular partition, in the deformable elastic support of partition inner edge arranged for interval, guarantees that liquid supply pipe is in the center of freezing pipe.Open spray hole on needing the liquid supply pipe within the scope of the subregion that freezes, the liquid nitrogen of ejection gasifies absorption refrigeration in the space between partition, to form frost wall outside freezing pipe.And not aperture on liquid supply pipe in freezing range is not being needed, the nitrogen after the gasification of lower part is discharged in the annular space between liquid supply pipe and partition and partition, to realize that the interval of different location is freezed in depth of freezing range, forms the frost wall that construction needs.The freezing pipe construction method is simple, can save liquid nitrogen usage amount, reduces frost heaving amount, meets special construction requirement.
Description
Technical field
The invention patent relates to liquid nitrogen freezers and construction method that partition is had on a kind of freezing pipe, are particularly suitable for fast
Speed, which is speedily carried out rescue work, to be carried out water shutoff to the freeze section soil body in construction freezing method and reinforces on the freezing pipe used to have the liquid nitrogen freezer of partition
And construction method.
Background technique
Engineering with artificial freezing method is to freeze the water in stratum using artificial cooling technology, natural ground is become frozen soil, is increased
Its strength and stability, isolation underground water and underground engineering contact, to construct under the protection of frost wall.Commonly
There are two types of construction methods, and one is brine freezing, another kind is liquid nitrogen freezing, and two methods respectively have advantage and disadvantage, in emergency work construction
In commonly use liquid nitrogen quick freezing.It uses liquid nitrogen to can achieve the unapproachable low temperature of bulk freezing as refrigerant, realizes fast quick-frozen
The purpose of knot.Drilling is accomplished fluently in advance in needing the stratum freezed, and is put into dedicated frigo in the borehole, liquid nitrogen is in dedicated jelly
It is evaporated in knot device, largely takes away the heat around frigo in soil layer, so that soil layer Quick freezing, freezing speed is ordinary salt
Water freezes 10 times or more.Frigo is the critical component during liquid nitrogen freezing, generally by freezing pipe and being arranged in freezing pipe
Internal liquid supply pipe composition, the circulation of the nitrogen after realizing liquid nitrogen and gasification.Since the feed flow pipe size inside freezing pipe is small,
Position inside freezing pipe can not accurately control, so the liquid nitrogen distribution and gasification process control difficulties inside freezing pipe are larger,
Frozen soil development around freezing pipe is unable to accurately control, and the frost wall uniformity for causing liquid nitrogen freezing to be formed is poor.
Summary of the invention
Shortcoming in view of the above technology, providing a kind of controls the effect for freezing pipe outer wall different location accurately
System, the frozen soil range of formation is rationally effective, unnecessary frozen soil region outside scope of design is reduced, so that reaching raising freezes matter
Amount saves liquid nitrogen usage amount, reduces freeze-off time, the liquid nitrogen of partition is had on the freezing pipe of the frost heaving amount during control freezing
Frigo and construction method.
To achieve the above object, the liquid nitrogen freezing pipe on freezing pipe of the invention with partition, it is characterised in that: it includes column
Shape structure and the freezing pipe of both ends sealing, freezing pipe top are equipped with upper sealing panel, and bottom is equipped with lower sealing plate, the center of circle of freezing pipe
In be equipped with across upper sealing panel and run through the liquid supply pipe of freezing pipe, feed flow bottom of the tube be equipped with block, top is above upper sealing panel
It stretches out, freezes bottom of the tube equipped with freezing pipe base cone, the upper sealing panel of freezing pipe top liquid supply pipe side is equipped with connection freezing pipe
Escape pipe inside and outside is provided with multiple partitions that freezing pipe is divided into multiple spaces on liquid supply pipe, wherein the position root of partition
According to needing to be arranged, by adjusting partition position so as to adjust the size of segmentation freezing pipe inner space, the partition is ring-type
Structure, on the outside of partition with freeze inside pipe wall and fix, there are gap between partition inside and liquid supply pipe, be equipped at intervals in gap multiple
Spring fastening, liquid supply pipe side are equipped with multiple spray holes, spray from spray hole convenient for liquid nitrogen, and in the space between partition
After gasification, gap of the gas between partition and freezing pipe is moved upwards, and is finally discharged by escape pipe.
The hydrojet hole number being arranged on liquid supply pipe and size are set as needed, spray hole equidistantly arrange or
The aperture mode of zigzag arrangement is freezed according to the case where practical soil layer and freeze-off time etc. is come what is set in liquid supply pipe insertion
During pipe, elastic support deforms under the action of the spring, facilitates the insertion of liquid supply pipe to construct, while can guarantee feed flow
Pipe, which is located at, freezes tube hub, and the liquid nitrogen around liquid supply pipe is made to form annular space between partition and partition, liquid nitrogen partition with
The effect of annular space gasification between partition is not much different.
The freezing pipe is welded to each other by multiple cylinders and is constituted, and the quantity of cylinder needs to be arranged according to actual processing.
The construction method of the liquid nitrogen freezer with partition, step are on a kind of freezing pipe；
The first step, according to the needs of practice of construction, measurement needs to freeze the depth bounds of bottom, according to measurement situation along
Freezing pipe direction opens up spray-hole in the place for needing aperture, does not need the position freezed and does not have to open spray-hole (3),
Second, five spring fastenings are welded in the inside edge of partition, two composition freezing pipes are arranged in partition
Be welded together to form one between cylinder and freeze pipe unit, according to the actual situation in the depth of freezing that needs, freeze multiple
The liquid nitrogen freezing pipe that can form different baffle intervals is combined before and after pipe unit；
Third step is blocked liquid supply pipe one end using blocking, using be equipped with the one end blocked as head by liquid supply pipe along
In spring fastening insertion freezing pipe on partition, sealing plate and installing on lower sealing plate freezes under the installation of the bottom of freezing pipe
Tube bottom cone, opens one and the matched liquid supply pipe hole of feed flow pipe size in the center point of upper sealing panel, blocks liquid supply pipe not
One end from upper sealing panel stretch out, one and the matched escape pipe hole of escape pipe are opened in liquid supply pipe hole side, in escape pipe
Hole is inserted into escape pipe；
Liquid nitrogen is injected liquid supply pipe when being freezed by the 4th step, and liquid nitrogen is sprayed by the spray hole on liquid supply pipe, is led to
Crossing porous ejection form makes liquid nitrogen gasify between partition, gap discharge of the gas between partition and liquid supply pipe, last gas
It is discharged from escape pipe.
Freezing pipe is subjected to piecemeal using partition, the spacing of partition, the quantity of aperture and position, the injection amount of liquid nitrogen, from
And liquid nitrogen gasifies in partition, generates relatively uniform freezing efficiency, and do not opened on the layer position for not needing to freeze, feed flow tube wall
Hole, annular space discharge of the nitrogen of lower part discharge between partition and liquid supply pipe, liquid nitrogen, which will not enter, does not open up spray hole
Partition room space in, the heat of surrounding soil layer is mainly absorbed by the liquid gas shift of liquid nitrogen due to freezing, gas
Nitrogen after change can't generate refrigeration effect by not being provided with the frost area under control domain of spray-hole from annular space, therefore limit
The outside transmitting of cooling capacity, to will not freeze in the depth bounds.
The utility model has the advantages that
1. freezing pipe upper-lower seal, the liquid supply pipe of freezing pipe is equipped with across upper sealing panel and run through in the center of circle of freezing pipe,
Feed flow bottom of the tube is equipped with closure, top is stretched out above upper sealing panel, freezes bottom of the tube equipped with freezing pipe base cone, freezing pipe top
The upper sealing panel of liquid supply pipe side is equipped with the escape pipe of connection freezing pipe inside and outside, is provided on liquid supply pipe multiple by freezing pipe point
Be segmented into the partition in multiple spaces, wherein the position of partition is set as needed, by adjusting partition position so as to adjust segmentation
The size of freezing pipe inner space, the partition are cyclic structure, on the outside of partition with freeze inside pipe wall and fix, on the inside of partition with confession
There are gap between liquid pipe, multiple spring fastenings are equipped at intervals in gap, liquid supply pipe side is equipped with multiple spray holes, is convenient for liquid nitrogen
It is sprayed from spray hole, and in the space between partition after gasification, gap of the gas between partition and freezing pipe is transported upwards
It is dynamic, finally it is discharged by escape pipe.To realize liquid supply pipe at the center of freezing pipe, gasification of the liquid nitrogen between partition and partition
Effect is identical, and entire freezing pipe freezes more uniform.
2. the hydrojet hole number being arranged on liquid supply pipe and size are set as needed, aperture mode is according to practical soil
What the case where layer and freeze-off time etc. set, during liquid supply pipe is inserted into freezing pipe internal partition, elastic support can become
Shape facilitates the insertion of liquid supply pipe to construct, while can guarantee that liquid supply pipe is located at and freeze tube hub, and the liquid nitrogen around liquid supply pipe is made to exist
The effect of annular space gasification between partition and partition is not much different.Spray hole is opened on feed flow tube wall among partition, is sprayed
Liquid nitrogen gasify in partition intermediate space heat absorption.The heat for absorbing surrounding soil at gas using liquid nitrogen gasification, so not
The layer position for needing to freeze, not aperture on feed flow tube wall, the nitrogen after having completed liquid nitrogen gasification is between partition and liquid supply pipe
Annular space discharge, can't enter do not open up spray hole partition room space in generation refrigeration effect, limit cold
The outside transmitting of amount, to not will form freezing efficiency in the depth bounds.
3. welding elastic support using partition inner edge interval, partition is arranged between the cylinder of two composition freezing pipes and welds
Be connected together and to form a partition and freeze pipe unit in intermediate, according to the actual situation in the depth of freezing that needs, by multiple jellies
The liquid nitrogen freezing pipe that can form different baffle intervals is combined before and after knot pipe unit.
Detailed description of the invention
Fig. 1 is the liquid nitrogen freezer structural schematic diagram that partition is had on liquid supply pipe of the invention.
Fig. 2 is the 1-1 sectional view of the liquid nitrogen freezer on liquid supply pipe of the invention with partition.
Fig. 3 is a freezing unit longitudinal sectional drawing of the liquid nitrogen freezer on liquid supply pipe of the invention with partition.
Fig. 4 is the freezing unit construction schematic diagram of the liquid nitrogen freezer on liquid supply pipe of the invention with partition.
Fig. 5 is liquid supply pipe structural schematic diagram of the invention.
In figure: freezing pipe -1, liquid supply pipe -2, spray hole -3, partition -4, closure -5, lower sealing plate -6, freezing pipe base cone -
7, upper sealing panel -8, escape pipe -9, spring fastening -10.
Specific embodiment
Specific embodiment is described further with reference to the accompanying drawing:
As shown in Figure 1, the liquid nitrogen freezing pipe on freezing pipe of the invention with partition, including column structure and both ends are sealed
Freezing pipe 1, upper sealing panel 8 is equipped at the top of freezing pipe 1, and bottom is equipped with lower sealing plate 6, is equipped in the center of circle of freezing pipe 1 across upper
Sealing plate 8 and the liquid supply pipe 2 for running through freezing pipe 1,2 bottom of liquid supply pipe is equipped with closure 5, top is stretched out above upper sealing panel 8, freezes
It ties 1 bottom of pipe and is equipped with freezing pipe base cone 7, the upper sealing panel 8 of 1 top liquid supply pipe of freezing pipe, 2 side is equipped in connection freezing pipe 1
Outer escape pipe 9 is provided with multiple partitions 4 that freezing pipe 1 is divided into multiple spaces on liquid supply pipe 2, wherein the position of partition 4
Be set as needed, by adjusting partition 4 position so as to adjust the size of segmentation 1 inner space of freezing pipe, the partition 4 is
Cyclic structure, the outside of partition 4 are fixed with 1 inner wall of freezing pipe, on the inside of partition 4 there are gap, be spaced in gap between liquid supply pipe 2
Equipped with multiple spring fastenings 10,2 side of liquid supply pipe be equipped with multiple spray holes 3, sprayed from spray hole 3 convenient for liquid nitrogen, and every
After gasifying in space between plate 4, gap of the gas between partition 4 and freezing pipe 1 is moved upwards, finally by 9 row of escape pipe
Out.
As shown in Figure 2 and Figure 5,3 quantity of spray hole being arranged on liquid supply pipe 2 and size are set as needed, spray
The fluid apertures 3 equidistant aperture mode of arrangement or zigzag spacing is set according to the case where practical soil layer with freeze-off time etc.
, during liquid supply pipe 2 is inserted into freezing pipe 1, elastic support 10 deforms under the action of the spring, facilitates liquid supply pipe 2
Insertion construction, while can guarantee that liquid supply pipe 2 is located at 1 center of freezing pipe, make liquid nitrogen around liquid supply pipe 2 partition and partition it
Between form annular space, liquid nitrogen is not much different in the effect that this annular space gasifies.
The freezing pipe 1 is welded to each other by multiple cylinders to be constituted, and the quantity of cylinder needs to be arranged according to actual processing.
A kind of construction method of liquid nitrogen freezer, step are；
The first step, according to the needs of practice of construction, measurement needs to freeze the depth bounds of bottom, according to measurement situation along
1 direction of freezing pipe opens up spray-hole 3 in the place for needing aperture, does not need the position freezed and does not have to open spray-hole 3,
Second, as shown in Figure 3 and Figure 4, five spring fastenings 10 is welded in the inside edge of partition 4, partition 4 is arranged
Between the cylinder that two constitute freezing pipe 1 be welded together to form one and freeze pipe unit, according to the actual situation in need
The depth of freezing is freezed to combine the liquid nitrogen freezing pipe 1 that can form different baffle intervals before and after pipe unit by multiple；
Third step is blocked 2 one end of liquid supply pipe using blocking 5, using one end equipped with closure 5 as head by liquid supply pipe 2
Spring fastening 10 on partition 4 is inserted into freezing pipe 1, the sealing plate 6 and in lower sealing plate under the installation of the bottom of freezing pipe 1
Freezing pipe base cone 7 is installed on 6, one and the matched liquid supply pipe hole of 2 size of liquid supply pipe is opened in the center point of upper sealing panel 8, makes
One end that liquid supply pipe 2 is not blocked is stretched out from upper sealing panel 8, opens one in liquid supply pipe hole side and escape pipe 9 is matched out
Tracheae hole is inserted into escape pipe 9 in escape pipe hole；
Liquid nitrogen is injected liquid supply pipe 2 when being freezed by the 4th step, and liquid nitrogen is sprayed by the spray hole 3 on liquid supply pipe 2,
Liquid nitrogen is set to gasify between partition 4 by porous ejection form, gap discharge of the gas between partition 4 and liquid supply pipe 2, finally
Gas is discharged from escape pipe 9.
Freezing pipe is subjected to piecemeal using partition 4, the spacing of partition 4, the quantity of aperture and position, the injection amount of liquid nitrogen,
To which liquid nitrogen gasifies in partition, relatively uniform freezing efficiency is generated, and on the layer position for not needing to freeze, feed flow tube wall not
Aperture, annular space discharge of the nitrogen of lower part discharge between partition and liquid supply pipe, liquid nitrogen, which will not enter, does not open up hydrojet
In space between the partition 4 in hole 3, the heat of surrounding soil layer is mainly absorbed by the liquid gas shift of liquid nitrogen due to freezing, because
This, the nitrogen after gasification can't generate refrigeration effect by not being provided with 1 region of frost pipe of spray-hole 3 from annular space, because
This limits the outside transmitting of cooling capacity, to not will form frost wall in the depth bounds
Specific embodiment:
The first step, according to the needs of practice of construction, measurement needs to freeze the depth bounds of bottom, according to measurement situation along
1 direction of freezing pipe opens up spray-hole 3 in the place for needing aperture, does not need the position freezed and does not have to open spray-hole 3, partition it is interior
Five spring fastenings 10 are welded in edge, and the freezing pipe 1 at the upper and lower and both ends of circular bulkheads 4 is welded, and form partition in centre
Connector of the freezing pipe 1 on both sides.According to depth of freezing needs in construction, in the connector of 1 different location welded bands partition of freezing pipe,
Form the liquid nitrogen freezing pipe 1 of different baffle intervals；
Second step is blocked liquid supply pipe one end using blocking 5, as head that liquid supply pipe is suitable using one end equipped with closure 5
Spring fastening 10 on partition be inserted into freezing pipe, sealing plate 6 and pacify on lower sealing plate under the installation of the bottom of freezing pipe 1
Freezing pipe base cone 7 is filled, one and the matched liquid supply pipe hole of feed flow pipe size is opened in the center point of upper sealing panel 8, makes liquid supply pipe 2
The one end not blocked is stretched out from upper sealing panel 8, opens one and the matched escape pipe hole of escape pipe in liquid supply pipe hole side,
Escape pipe 9 is inserted into escape pipe hole；
Liquid nitrogen is injected liquid supply pipe 2 when being freezed by third step, and liquid nitrogen is sprayed by the spray hole 3 on liquid supply pipe,
Liquid nitrogen is set to gasify between partition 4 by porous ejection form, gap discharge of the gas between partition 4 and liquid supply pipe 2, finally
Gas is discharged from escape pipe 9.
Claims (5)
1. the liquid nitrogen freezing pipe on a kind of freezing pipe with partition, it is characterised in that: it includes the jelly of column structure and both ends sealing
Knot pipe (1), freezing pipe (1) top are equipped with upper sealing panel (8), and bottom is equipped with lower sealing plate (6), sets in the center of circle of freezing pipe (1)
There is across upper sealing panel (8) and runs through the liquid supply pipe (2) of freezing pipe (1), liquid supply pipe (2) bottom, which is equipped with, blocks (5), top from upper
It is stretched out above sealing plate (8), freezing pipe (1) bottom is equipped with freezing pipe base cone (7), liquid supply pipe (2) side at the top of freezing pipe (1)
Upper sealing panel (8) is equipped with the escape pipe (9) of connection freezing pipe (1) inside and outside, is provided on liquid supply pipe (2) multiple by freezing pipe
(1) it is divided into the partition (4) in multiple spaces, wherein the position of partition (4) is set as needed, by adjusting the position of partition (4)
Set so as to adjust the size of segmentation freezing pipe (1) inner space, the partition (4) is cyclic structure, on the outside of partition (4) with freeze
Pipe (1) inner wall is fixed, and there are gap between liquid supply pipe (2) on the inside of partition (4), is equipped at intervals with multiple spring fastenings in gap
(10), liquid supply pipe (2) side is equipped with multiple spray holes (3), sprays from spray hole (3) convenient for liquid nitrogen, and between partition (4)
Space in gasify after, gap of the gas between partition (4) and freezing pipe (1) moves upwards, finally by escape pipe (9) row
Out.
2. liquid nitrogen freezer of the freezing pipe according to claim 1 with partition, it is characterised in that: described to be arranged in liquid supply pipe
(2) the aperture mode of spray hole (3) quantity and size on, equidistant arrangement or zigzag spacing, according to practical soil layer
Situation and freeze-off time etc. are come what is set, and during liquid supply pipe (2) are inserted into freezing pipe (1), elastic support (10) is in spring
It deforms under effect, facilitates the insertion of liquid supply pipe (2) to construct, while can guarantee that liquid supply pipe (2) is located in freezing pipe (1)
The heart, makes the liquid nitrogen around liquid supply pipe (2) form annular space between partition and partition, and liquid nitrogen is annular between partition and partition
The effect of space gasification is not much different.
3. liquid nitrogen freezer of the freezing pipe according to claim 1 with partition, it is characterised in that: the freezing pipe (1) by
Multiple cylinders are welded to each other composition, and the quantity of cylinder needs to be arranged according to actual processing.
4. a kind of construction method using the liquid nitrogen freezer with partition on freezing pipe described in the claims, feature exist
It is in step；
The first step, according to the needs of practice of construction, measurement needs to freeze the depth bounds of bottom, according to measurement situation along freezing
It manages (1) direction and opens up spray-hole (3) in the place for needing aperture, do not need the position freezed and do not have to open spray-hole (3),
Second, five spring fastenings (10) are welded in the inside edge of partition (4), partition (4) setting is frozen in two compositions
Be welded together to form one between the cylinder of knot pipe (1) and freeze pipe unit, according to the actual situation in the depth of freezing that needs, will
It is multiple to freeze to combine the liquid nitrogen freezing pipe (1) that form different baffle intervals before and after pipe unit；
Third step is blocked liquid supply pipe (2) one end using closure (5), using one end equipped with closure (5) as head by liquid supply pipe
(2) in spring fastening (10) insertion freezing pipe (1) on partition (4), the sealing plate under the installation of the bottom of freezing pipe (1)
(6) and on lower sealing plate (6) freezing pipe base cone (7) are installed, open one and liquid supply pipe (2) in the center point of upper sealing panel (8)
The matched liquid supply pipe hole of size, the one end for not blocking liquid supply pipe (2) is stretched out from upper sealing panel (8), in liquid supply pipe hole
One and escape pipe (9) matched escape pipe hole are opened in side, are inserted into escape pipe (9) in escape pipe hole；
Liquid nitrogen is injected liquid supply pipe (2) when being freezed by the 4th step, and liquid nitrogen passes through spray hole (3) spray on liquid supply pipe (2)
Out, liquid nitrogen is made to gasify between partition (4) by porous ejection form, gap of the gas between partition (4) and liquid supply pipe (2)
Discharge, last gas are discharged from escape pipe (9).
5. construction method according to claim 4, it is characterised in that: freezing pipe is carried out piecemeal, partition using partition (4)
(4) quantity of spacing, aperture and position, the injection amount of liquid nitrogen generate relatively uniform jelly so that liquid nitrogen gasifies in partition
Knot effect, and the not aperture on the layer position for not needing to freeze, feed flow tube wall, the nitrogen of lower part discharge is between partition and liquid supply pipe
Annular space discharge, liquid nitrogen will not enter in the space between not opening up the partitions (4) of spray hole (3), main due to freezing
The heat of surrounding soil layer is absorbed by the liquid gas shift of liquid nitrogen, therefore, the nitrogen after gasification is from annular space by not opening
Refrigeration effect can't be generated by having frost pipe (1) region of spray-hole (3), therefore limit the outside transmitting of cooling capacity, thus
The depth bounds will not freeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093943.6A CN109826182B (en) | 2019-01-30 | 2019-01-30 | Liquid nitrogen freezer with partition plates on freezing pipes and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093943.6A CN109826182B (en) | 2019-01-30 | 2019-01-30 | Liquid nitrogen freezer with partition plates on freezing pipes and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN109826182A true CN109826182A (en) | 2019-05-31 |
| CN109826182B CN109826182B (en) | 2020-09-04 |
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ID=66862042
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910093943.6A Active CN109826182B (en) | 2019-01-30 | 2019-01-30 | Liquid nitrogen freezer with partition plates on freezing pipes and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496440A (en) * | 2020-11-19 | 2021-03-16 | 北京中煤矿山工程有限公司 | Hydraulic pipe cutter for horizontal freezing pipe in tunnel |
| CN115262526A (en) * | 2022-09-05 | 2022-11-01 | 上海建工集团股份有限公司 | Artificial stratum freezing device and method with adjustable freezing position |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU837999A1 (en) * | 1979-05-15 | 1981-06-15 | Новосибирский Филиал Всесоюзного Науч-Ho-Исследовательского Института Tpahc-Портного Строительства | Thermal pile |
| CN201031387Y (en) * | 2007-04-18 | 2008-03-05 | 上海地铁运营有限公司 | Liquid nitrogen freeze coagulation device |
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2019
- 2019-01-30 CN CN201910093943.6A patent/CN109826182B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU837999A1 (en) * | 1979-05-15 | 1981-06-15 | Новосибирский Филиал Всесоюзного Науч-Ho-Исследовательского Института Tpahc-Портного Строительства | Thermal pile |
| CN201031387Y (en) * | 2007-04-18 | 2008-03-05 | 上海地铁运营有限公司 | Liquid nitrogen freeze coagulation device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496440A (en) * | 2020-11-19 | 2021-03-16 | 北京中煤矿山工程有限公司 | Hydraulic pipe cutter for horizontal freezing pipe in tunnel |
| CN112496440B (en) * | 2020-11-19 | 2021-12-14 | 北京中煤矿山工程有限公司 | Hydraulic pipe cutter for horizontal freezing pipe in tunnel |
| CN115262526A (en) * | 2022-09-05 | 2022-11-01 | 上海建工集团股份有限公司 | Artificial stratum freezing device and method with adjustable freezing position |
| CN115262526B (en) * | 2022-09-05 | 2023-08-22 | 上海建工集团股份有限公司 | Artificial stratum freezing device and method with adjustable freezing position |
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| Publication number | Publication date |
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| CN109826182B (en) | 2020-09-04 |
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