CN220789716U - Liquid nitrogen freezer with multiple liquid supply pipes - Google Patents
Liquid nitrogen freezer with multiple liquid supply pipes Download PDFInfo
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- CN220789716U CN220789716U CN202322090574.XU CN202322090574U CN220789716U CN 220789716 U CN220789716 U CN 220789716U CN 202322090574 U CN202322090574 U CN 202322090574U CN 220789716 U CN220789716 U CN 220789716U
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- liquid supply
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- freezing
- liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 193
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 78
- 238000007710 freezing Methods 0.000 claims abstract description 102
- 230000008014 freezing Effects 0.000 claims abstract description 102
- 238000005192 partition Methods 0.000 claims abstract description 8
- 239000002689 soil Substances 0.000 abstract description 19
- 238000002309 gasification Methods 0.000 description 11
- 238000009835 boiling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a liquid nitrogen freezer with multiple liquid supply pipes, which relates to the technical field of stratum freezing and comprises a freezing pipe, wherein a partition plate is arranged at the top in the freezing pipe, an exhaust pipe, a first liquid supply pipe, a second liquid supply pipe and a third liquid supply pipe are sequentially arranged at the top end of the partition plate along the anticlockwise direction, and auxiliary components are arranged at the bottom ends of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe; the inside top that just is located the baffle of freezing the pipe sets up to non-freezing section, and the inside bottom that just is located the baffle of freezing the pipe sets up to freezing section. The utility model has scientific and novel structure, can lead the low-temperature liquid nitrogen to be spread over the freezing section of the whole freezing pipe when heat exchange occurs between the low-temperature liquid nitrogen and surrounding medium, can lead the temperature distribution at different positions of the bottom of the freezing pipe in the upward longitudinal direction to be uniform, improves the uniformity of the temperature distribution of soil body and overcomes the phenomenon of uneven profile of frozen soil frozen by the liquid nitrogen.
Description
Technical Field
The utility model relates to the technical field of stratum freezing, in particular to a liquid nitrogen freezer with multiple liquid supply pipes.
Background
Liquid nitrogen freezing is one of the artificial stratum freezing technologies, and belongs to the refrigeration category of physical state change. The liquid nitrogen is gasified directly in the freezing pipe to generate gasification latent heat and temperature rise sensible heat and absorb heat in the stratum, thereby realizing quick freezing of the soil layer. The liquid nitrogen freezing has the characteristics of simple system, high freezing speed, low freezing temperature, high frozen soil curtain strength and the like, the form of freezing and reinforcing the soil body is flexible, the freezing scale is not limited, and meanwhile, the frost heaving and thawing sinking of the soil body are far smaller than those of common brine freezing.
For example, CN201110264991.0 discloses a liquid nitrogen freezer with multiple liquid supply pipes, which comprises a freezing pipe, an exhaust pipe and at least two liquid supply pipes, wherein the exhaust pipe and the liquid supply pipes are arranged in the freezing pipe, and one ends of the exhaust pipe and the liquid supply pipes are fixed on the freezing pipe at the port of the freezing pipe. The method can control the position and the quantity of the gasified liquid nitrogen in the freezing pipe, so that the freezing effect of stratum liquid nitrogen is controllable, frozen soil formed by freezing the liquid nitrogen can obtain any required shape, including uniform and continuous frozen soil bodies with specific shapes, the consumption of the liquid nitrogen is reduced to the maximum extent, the construction period is saved, and the economy of freezing the liquid nitrogen is improved.
According to the liquid nitrogen freezer, one ends of the exhaust pipe and the liquid supply pipe are fixed on the freezing pipe at the port of the freezing pipe, the other end of the liquid supply pipe extends to different positions in the longitudinal direction of the freezing pipe, and then a plurality of small holes are formed in the circumferential direction of the bottom end of the liquid supply pipe, so that when liquid nitrogen is frozen, heat exchange between low-temperature liquid nitrogen and surrounding medium mainly occurs at the opening of the liquid supply pipe, a plurality of small holes are formed in the circumferential direction of the bottom end only, holes are not formed in the longitudinal direction above the bottom end, the phenomenon that the frozen soil profile of liquid nitrogen is uneven can occur, the liquid nitrogen consumption is relatively high, the liquid nitrogen is not effectively utilized, the caused waste of liquid nitrogen is increased, and the engineering cost and the freezing period are increased.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the utility model provides a liquid nitrogen freezer with multiple liquid supply pipes, which aims to overcome the technical problems in the prior related art.
For this purpose, the utility model adopts the following specific technical scheme:
the liquid nitrogen freezer with multiple liquid supply pipes comprises a freezing pipe, wherein a partition plate is arranged at the top in the freezing pipe, an exhaust pipe, a first liquid supply pipe, a second liquid supply pipe and a third liquid supply pipe are sequentially arranged at the top end of the partition plate along the anticlockwise direction, and auxiliary components are arranged at the bottom ends of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe; the inside top that just is located the baffle of freezing the pipe sets up to non-freezing section, and the inside bottom that just is located the baffle of freezing the pipe sets up to freezing section.
Further, in order to realize the fixation to the baffle, the top lateral wall in the freezing pipe is provided with the annular plate, and through a plurality of bolt fixed connection between annular plate and the baffle.
Further, in order to better ensure that the whole freezing pipe is in a liquid nitrogen boiling state, the temperature distribution of the lower part and the upper part of the freezing pipe is uniform, a large amount of heat is absorbed when the liquid nitrogen is vaporized, the surrounding temperature is rapidly reduced, the pipe wall temperature of the freezing pipe is also reduced, the soil body is frozen, the lengths of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe are sequentially increased, and a plurality of first through holes, second through holes and third through holes are sequentially formed in the outer sides of the circumferences of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe; the bottom ends of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe are sequentially positioned at 1/3 part, 2/3 part and the bottom of the freezing section; the first through holes, the second through holes and the third through holes are arranged in a staggered and opposite way at equal intervals.
Further, in order to improve the gasification efficiency of the liquid nitrogen, when the liquid nitrogen flows out of the liquid outlet pipe, the ball body can be driven to rotate in one direction, so that the liquid nitrogen can be driven to flow in the freezing pipe, the gasification speed of the liquid nitrogen is improved, the freezing speed of the freezing pipe is improved, the auxiliary assembly comprises rotary joints arranged at the outer sides of the bottom ends of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe, connecting pipes are arranged in the rotary joints, balls are arranged at the bottom ends of the connecting pipes, and a plurality of liquid outlet pipes are arranged at the outer sides of the balls; the cross section of the liquid outlet pipe is L-shaped.
The beneficial effects of the utility model are as follows:
1. the utility model has scientific and novel structure, can lead the low-temperature liquid nitrogen to be spread over the freezing section of the whole freezing pipe when heat exchange occurs between the low-temperature liquid nitrogen and surrounding medium, can lead the temperature distribution at different positions of the bottom of the freezing pipe in the upward longitudinal direction to be uniform, improves the uniformity of the temperature distribution of soil body and overcomes the phenomenon of uneven profile of frozen soil frozen by the liquid nitrogen.
2. Through the arrangement of the first liquid supply pipe, the second liquid supply pipe and the third liquid supply pipe, the whole freezing pipe is in a liquid nitrogen boiling state, so that the temperature distribution of the lower part and the upper part of the freezing pipe is uniform, a large amount of heat is absorbed during liquid nitrogen vaporization, the surrounding temperature is caused to drop rapidly, the pipe wall temperature of the freezing pipe is also reduced, and soil is frozen.
3. Through setting up auxiliary assembly to improved the gasification efficiency of liquid nitrogen, when liquid nitrogen flows from the drain pipe, can drive the spheroid and rotate towards a direction, can drive the liquid nitrogen and produce the flow in the inside of freezing the pipe, improved the gasification speed of liquid nitrogen, and then improved the freezing rate of freezing the pipe.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-feed tube liquid nitrogen freezer according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a multi-feed tube liquid nitrogen freezer in accordance with an embodiment of the present utility model;
fig. 3 is a partial enlarged view at a in fig. 2.
In the figure:
1. a freezing pipe; 101. an annular plate; 102. a bolt; 2. a partition plate; 3. an exhaust pipe; 4. a first liquid supply pipe; 401. a first through hole; 5. a second liquid supply pipe; 501. a second through hole; 6. a third liquid supply pipe; 601. a third through hole; 7. an auxiliary component; 701. a rotary joint; 702. a connecting pipe; 703. a sphere; 704. a liquid outlet pipe; 8. a non-frozen section; 9. freezing the segment.
Description of the embodiments
For the purpose of further illustrating the various embodiments, the present utility model provides the accompanying drawings, which are a part of the disclosure of the present utility model, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present utility model, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to an embodiment of the present utility model, a multi-feed tube liquid nitrogen freezer is provided.
Referring to the drawings and the specific embodiments, as shown in fig. 1-3, a multi-liquid-supply-pipe liquid nitrogen freezer according to an embodiment of the utility model comprises a freezing pipe 1, wherein a baffle plate 2 is arranged at the top in the freezing pipe 1, an exhaust pipe 3, a first liquid supply pipe 4, a second liquid supply pipe 5 and a third liquid supply pipe 6 are sequentially arranged at the top end of the baffle plate 2 along the anticlockwise direction, and auxiliary components 7 are arranged at the bottom ends of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6; the inside of freezing pipe 1 and the top that is located baffle 2 set up to non-freezing section 8, and the inside and bottom that is located baffle 2 of freezing pipe 1 set up to freezing section 9, and for above-mentioned freezing pipe 1, the top lateral wall in the freezing pipe 1 is provided with annular plate 101, and through a plurality of bolts 102 fixed connection between annular plate 101 and the baffle 2.
In addition, in a specific application, the projections of the exhaust pipe 3, the first liquid supply pipe 4, the second liquid supply pipe 5, and the third liquid supply pipe 6 in the horizontal direction are plum blossom-shaped.
By means of the technical scheme, the utility model has a scientific and novel structure, can enable the low-temperature liquid nitrogen to be distributed over the freezing section 9 of the whole freezing pipe 1 when heat exchange occurs between the low-temperature liquid nitrogen and surrounding medium, can enable the temperature distribution at different positions of the bottom of the freezing pipe 1 in the upward longitudinal direction to be uniform, improves the uniformity of soil temperature distribution, and overcomes the phenomenon that the profile of frozen soil is frozen by the liquid nitrogen.
In one embodiment, for the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6, the lengths of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6 are sequentially increased, a plurality of first through holes 401, second through holes 501 and third through holes 601 are sequentially formed on the outer sides of the circumferences of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6, in addition, in specific application, the diameters of the first through holes 401, the second through holes 501 and the third through holes 601 are set to be 5mm, and the pitches of two adjacent first through holes 401, two adjacent second through holes 501 and two adjacent third through holes 601 in the vertical direction are set to be 500mm respectively; the bottom ends of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6 are sequentially positioned at 1/3, 2/3 and the bottom of the freezing section 9; the plurality of first through holes 401, the second through holes 501 and the third through holes 601 are arranged in a staggered and split mode at equal intervals, so that the whole freezing pipe 1 is in a liquid nitrogen boiling state, the temperature distribution of the lower part and the upper part of the freezing pipe 1 is uniform, a large amount of heat is absorbed during liquid nitrogen vaporization, the surrounding temperature is rapidly reduced, the pipe wall temperature of the freezing pipe 1 is also reduced, and soil is frozen.
The working principles of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6 are as follows: when liquid nitrogen enters the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6, liquid nitrogen can enter the freezing pipe 1 through the first through hole 401, the second through hole 501 and the third through hole 601, and the positions of the first through hole 401, the second through hole 501 and the third through hole 601 are different, so that the liquid nitrogen can exchange heat with surrounding media when flowing out, uniform freezing of the freezing pipe 1 is realized, and uniformity of stable distribution is ensured.
In one embodiment, for the auxiliary assembly 7, the auxiliary assembly 7 includes a rotary joint 701 disposed outside the bottom ends of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6, a connecting pipe 702 is disposed inside the rotary joint 701, a ball 703 is disposed at the bottom end of the connecting pipe 702, and in addition, in a specific application, the inside of the ball 703 is a hollow structure, and a plurality of liquid outlet pipes 704 are disposed outside the ball 703; the cross section of drain pipe 704 sets up to L shape structure to improved the gasification efficiency of liquid nitrogen, when liquid nitrogen flows from drain pipe 704, can drive spheroid 703 and rotate towards a direction, can drive the liquid nitrogen and produce the flow in the inside of freezing pipe 1, improved the gasification speed of liquid nitrogen, and then improved the freezing rate of freezing pipe 1.
The auxiliary assembly 7 works on the principle that: when liquid nitrogen enters into the sphere 703 through the connecting pipe 702, liquid nitrogen can flow out through the liquid outlet pipe 704, and the cross section of the liquid outlet pipe 704 is of an L-shaped structure, so that the liquid nitrogen drives the sphere 703 in the flowing process and rotates under the action of the rotary joint 701, the fluidity of the liquid nitrogen is provided, and the gasification rate of the liquid nitrogen can be provided.
In order to facilitate understanding of the above technical solutions of the present utility model, the following describes in detail the working principle or operation manner of the present utility model in the actual process.
In practical application, firstly, the freezing pipe 1 is placed in a stratum to be frozen, then liquid nitrogen is introduced into the freezing pipe 1 through the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6 (the working principles of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6 are as described above), heat exchange is carried out on the freezing section of the freezing pipe 1, so that the inner wall of the freezing pipe 1 keeps relatively uniform low temperature, then the gasification efficiency of the liquid nitrogen is improved under the action of the auxiliary component 7 (the working principles of the auxiliary component 7 are as described above), the freezing rate of the freezing pipe 1 can be improved, and then the gasified nitrogen is discharged to the outside of the freezing pipe 1 through the exhaust pipe 3.
In summary, by means of the technical scheme, the utility model has a scientific and novel structure, can enable the low-temperature liquid nitrogen to be distributed over the freezing section 9 of the whole freezing pipe 1 when in heat exchange with surrounding medium, can enable the temperature distribution at different positions of the bottom of the freezing pipe 1 in the upward longitudinal direction to be uniform, improves the uniformity of the temperature distribution of soil body, and overcomes the phenomenon of nonuniform profile of frozen soil frozen by the liquid nitrogen; through the arrangement of the first liquid supply pipe 4, the second liquid supply pipe 5 and the third liquid supply pipe 6, the whole freezing pipe 1 is in a liquid nitrogen boiling state, so that the temperature distribution of the lower part and the upper part of the freezing pipe 1 is uniform, a large amount of heat is absorbed when the liquid nitrogen is vaporized, the surrounding temperature is rapidly reduced, the pipe wall temperature of the freezing pipe 1 is also reduced, and soil is frozen; through setting up auxiliary assembly 7 to improved the gasification efficiency of liquid nitrogen, when liquid nitrogen flows from drain pipe 704, can drive spheroid 703 and rotate towards a direction, can drive the inside production flow of liquid nitrogen at freezing pipe 1, improved the gasification speed of liquid nitrogen, and then improved freezing rate of freezing pipe 1.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (6)
1. The utility model provides a many liquid supply pipes's liquid nitrogen freezers, includes freezes pipe (1), its characterized in that, the top in freezes pipe (1) is provided with baffle (2), the top of baffle (2) has set gradually blast pipe (3), first liquid supply pipe (4), second liquid supply pipe (5) and third liquid supply pipe (6) along anticlockwise, the bottom of first liquid supply pipe (4), second liquid supply pipe (5) and third liquid supply pipe (6) all is provided with auxiliary assembly (7);
the freezing pipe (1) is internally arranged and positioned at the top end of the partition board (2) to form a non-freezing section (8), and the bottom end of the partition board (2) is internally arranged and positioned at the inner part of the freezing pipe (1) to form a freezing section (9);
the lengths of the first liquid supply pipe (4), the second liquid supply pipe (5) and the third liquid supply pipe (6) are sequentially increased, and a plurality of first through holes (401), second through holes (501) and third through holes (601) are sequentially formed in the outer sides of the circumferences of the first liquid supply pipe (4), the second liquid supply pipe (5) and the third liquid supply pipe (6).
2. The liquid nitrogen freezer with multiple liquid supply pipes according to claim 1, wherein an annular plate (101) is arranged on the top side wall in the freezing pipe (1), and the annular plate (101) is fixedly connected with the partition plate (2) through a plurality of bolts (102).
3. The liquid nitrogen freezer with multiple liquid supply pipes according to claim 2, wherein the bottom ends of the first liquid supply pipe (4), the second liquid supply pipe (5) and the third liquid supply pipe (6) are sequentially positioned at 1/3, 2/3 and bottom of the freezing section (9).
4. A multi-feed liquid pipe liquid nitrogen freezer as claimed in claim 3 wherein a plurality of said first through holes (401), second through holes (501) and third through holes (601) are all arranged in equally spaced offset pairs.
5. The liquid nitrogen freezer with multiple liquid supply pipes according to claim 1, wherein the auxiliary assembly (7) comprises rotary joints (701) arranged outside the bottom ends of the first liquid supply pipe (4), the second liquid supply pipe (5) and the third liquid supply pipe (6), connecting pipes (702) are arranged inside the rotary joints (701), spheres (703) are arranged at the bottom ends of the connecting pipes (702), and a plurality of liquid outlet pipes (704) are arranged outside the spheres (703).
6. A multi-feed liquid pipe liquid nitrogen freezer as claimed in claim 5 wherein said liquid outlet pipe (704) is provided with an L-shaped configuration in cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322090574.XU CN220789716U (en) | 2023-08-04 | 2023-08-04 | Liquid nitrogen freezer with multiple liquid supply pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322090574.XU CN220789716U (en) | 2023-08-04 | 2023-08-04 | Liquid nitrogen freezer with multiple liquid supply pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220789716U true CN220789716U (en) | 2024-04-16 |
Family
ID=90663004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322090574.XU Active CN220789716U (en) | 2023-08-04 | 2023-08-04 | Liquid nitrogen freezer with multiple liquid supply pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220789716U (en) |
-
2023
- 2023-08-04 CN CN202322090574.XU patent/CN220789716U/en active Active
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