CN103485327A

CN103485327A - Filming liquid nitrogen freezing device

Info

Publication number: CN103485327A
Application number: CN201310267302.0A
Authority: CN
Inventors: 宋雷
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2013-06-30
Filing date: 2013-06-30
Publication date: 2014-01-01
Anticipated expiration: 2033-06-30
Also published as: CN103485327B

Abstract

The invention discloses a filming liquid nitrogen freezing device. The filming liquid nitrogen freezing device comprises a bottom freezing pipeline (A3), a middle heat preservation and insulation layer (A2) and a top bearing surface layer (A1), wherein the freezing pipeline (A3) comprises transverse freezing pipes (1) and longitudinal freezing pipe (3); two adjacent transverse freezing pipes (1) are communicated by the longitudinal freezing pipe (3); the tops of the two ends of each transverse freezing pipe (1) are provided with gas outlet pipes (2); the gas outlet pipes (2) penetrate the heat preservation and insulation layer (A2) and are exposed by the bearing surface layer (A1) to be connected with the atmosphere; a port of each transverse freezing pipe (1) is also provided with a connecting device (4); the outer side face of one transverse freezing pipe (1) on the outer side is provided with a liquid supply pipe port (5). The filming liquid nitrogen freezing device has the beneficial effects that the freezing consolidation operation of soil is integrally implemented in a short time, and the access requirements can be met by means of the structure of the device.

Description

A kind of film covering type liquid nitrogen freezing device

Technical field

The present invention relates to a kind of film covering type liquid nitrogen freezing device, be particularly useful for the quick freezing of the subgrade and pavement in the areas such as High Temperature Permafrost, weak soil, marsh, also be applicable to the consolidation by freezing in shield structure turnover hole.

Background technology

At some in particular cases, during as disaster, war, due to it is pressed for time, often be badly in need of in areas such as High Temperature Permafrost, weak soil, marshes, realizing passing through fast temporarily.The reinforcement means duration of common subgrade and pavement is longer, can not meet the interim current requirement of quick realization.And freezing process can be passed through artificial cooling, the low temperature cold is sent into to stratum, the freezing soil of underground certain depth scope is become to have the frozen soils structure of some strength, and then possess fast interim current condition.The common form of construction work of freezing process is: accomplish fluently in advance boring in the soil layer freezed at needs, place frigo in boring, operation is freezed in construction.

Although common freezing method is fairly simple, but the liquid nitrogen freezer of prior art is independent pipe structure, as shown in Figure 9, comprise and freeze single tube 11, freezing pipe base cone 12, freeze the second sealed tube 14 that the first sealing plate 13, bottom that single tube 11 tops are provided with are provided with, freeze the feed flow long tube 15 and the air feed short tube 16 that are provided with in single tube 11.Because single valve freezing device sphere of action is limited, thereby need arrange that a plurality of single tubes 11 that freeze are in stratum by landform while using, complicated layout, duration are longer; And action effect is limited, under the condition such as the very urgent rescue and relief work in time requirement, war, still be difficult to reach the purpose that completes rapid construction within the extremely short time.

Summary of the invention

For above-mentioned existing technical problem, the invention provides a kind of film covering type liquid nitrogen freezing device, to realize the consolidation by freezing operation of the total implementation soil body at short notice, and can rely on self structure to meet current requirement.

For achieving the above object, a kind of film covering type liquid nitrogen freezing of the present invention device, what comprise bottom freezes pipeline, also comprises the thermal insulation separation thermosphere at middle part and the load-bearing surface layer at top; Freeze pipeline and comprise horizontal freezing pipe and vertical freezing pipe, be communicated with by vertical freezing pipe between adjacent two horizontal freezing pipes; Top, every horizontal freezing pipe two ends is equipped with escape pipe, and escape pipe passes the thermal insulation separation thermosphere and exposed with atmosphere and be connected by the load-bearing surface layer; Every horizontal freezing pipe one port also is provided with linkage; Wherein a lateral surface that is positioned at the horizontal freezing pipe in the outside is provided with the feed pipe interface.

Details are as follows for each parts: high strength load-bearing surface layer of the present invention, can use steel to make, also can use other composite material to make, lay the thermal insulation separation thermosphere below the load-bearing surface layer, arrange and freeze pipeline below the thermal insulation separation thermosphere, the horizontal freezing pipe of freezing pipe route is with vertically the freezing pipe composition is netted.But the feed pipe interface connecting fluid nitrogen supply equipment that laterally the freezing pipe lateral surface arranges, in order to pass into liquid nitrogen in this device; The escape pipe mouth of pipe that laterally top, freezing pipe two ends arranges passes thermal insulation separation thermosphere, load-bearing surface layer successively, with atmosphere, contacts.The linkage that laterally freezing pipe one port is provided with can be assembled two adjacent film covering type liquid nitrogen freezing devices, extends and freezes pipeline; Linkage uses the equipment that flexibly connects, and to prevent that the freezing pipe road from shrinking, causes large deformation to cause the destruction of syndeton.

For convenience of passing through of assembling and vehicle, this device load-bearing surface layer is 4-6m with the length on horizontal freezing pipe parallel direction, be greater than by the twice of vehicle single-wheel width with the length on vertical freezing pipe parallel direction, not only facilitate single block, also facilitate two-wheel car to pass through.The escape pipe mouth of pipe with vertical freezing pipe parallel direction on spacing be greater than by the width of vehicle single-wheel, the spacing that guarantees to expose the escape pipe of bearing course can meet the minimum spacing that wheel passes through.

After selected construction area, by linkage, this device of burst head and the tail are connected, are assembled into the parallel passage of two row fast, and the distance of two row channel center by the wheelspan of mistake vehicle, the frigo passage that makes the tire of vehicle both sides roll respectively respective side moves ahead.Secondly, by the feed pipe interface to freezing in pipeline to pass into liquid nitrogen in device, rely on insulation layer below and send out freezing pipeline and passing the escape pipe of insulation layer of arranging, utilize liquid nitrogen circulation and evaporation to take away the mode of heat, a large amount of take away the heat in the surrounding formation soil, reached the purpose on quick freezing stratum.This unit engineering amount is little, and speed of application is fast, and freezing speed is fast, is specially adapted to the stratum rapid freezing constructions in particular cases such as swampy terrain, swampy area.

The accompanying drawing explanation

Fig. 1 is structure top view of the present invention;

Fig. 2 be in Fig. 1 A-A to sectional view;

Fig. 3 be in Fig. 1 B-B to sectional view;

Fig. 4 be in Fig. 1 C-C to sectional view;

The top view that Fig. 5 is all pipelines in the present invention;

A kind of enforcement illustration that Fig. 6 is linkage;

The another kind that Fig. 7 is linkage is implemented illustration;

Fig. 8 is enforcement schematic diagram of the present invention;

The structural representation that Fig. 9 is the prior art liquid nitrogen freezer.

In figure: A1, load-bearing surface layer, A2, thermal insulation separation thermosphere, A3, freeze pipeline, 1, horizontal freezing pipe, 2, escape pipe, 3, vertical freezing pipe, 4, linkage, 5, the feed pipe interface, 6, allow the power ring, 7, groove, 8, boss, 11, freeze single tube, 12, freezing pipe base cone, the 13, first sealing plate, the 14, second sealed tube, 15, feed flow long tube, 16, the air feed short tube.

The specific embodiment

Below in conjunction with accompanying drawing, the invention will be further described.

As shown in Figure 1, what the present invention includes the thermal insulation separation thermosphere A2 at load-bearing surface layer A1, middle part at top and bottom freezes pipeline A3, and load-bearing surface layer A1 is used steel or composite material to make; As shown in Figure 5, freeze pipeline A3 and comprise vertical freezing pipe 3 and horizontal freezing pipe 1, be communicated with by vertical freezing pipe 3 between adjacent two horizontal freezing pipes 1, freeze pipeline A3 and adopt stainless steel tube or seamless steel pipe.As shown in Figure 2, every horizontal freezing pipe 1 top, two ends is provided with escape pipe 2, escape pipe 2 passes thermal insulation separation thermosphere A2 and is exposed with atmosphere and be connected by load-bearing surface layer A1, and escape pipe 2 mouths of pipe with vertical freezing pipe 3 parallel directions on spacing be greater than by the width of vehicle single-wheel, escape pipe 2 adopts seamless steel pipe or stainless steel tubes.As shown in Figure 3, every horizontal freezing pipe 1 one ports also are provided with linkage 4, and as shown in Figure 4, wherein a lateral surface that is positioned at the horizontal freezing pipe 1 in the outside is provided with feed pipe interface 5.

Utilize the step of the invention process film covering type liquid nitrogen freezing method as follows: at first, according to on-site actual situations, to determine corresponding frozen region, and film covering type liquid nitrogen freezing device is transported to the place that needs frozen construction.Secondly, as shown in Figure 8, according to the position of the every freezing equipment in between-wheel spacing location, according to the wheelspan of crossed vehicle, first laterally lay two film covering type liquid nitrogen freezing devices, make the spacing at both centers equal wheelspan.Simultaneously, be to meet current requirement, load-bearing surface layer A1 with horizontal freezing pipe 1 parallel direction on the preferred 5m of length, with vertical freezing pipe 3 parallel directions on length be greater than by the twice of vehicle single-wheel width.Then continue to extend at two freezing plant two ends of having laid and lay this device, connect successively by the pipeline 1 that laterally freezes in the film covering type liquid nitrogen freezing device by adjacent, extend and be assembled into two wheel passages.

Described linkage refers to flexible connecting device, can select another granted patent of the applicant during concrete enforcement: the connector of flexible freezing pipe (patent No.: 2006200716578), as shown in Figure 6 and Figure 7, it consists of a power ring 6 that allows be located between horizontal freezing pipe 1, allow the middle part of power ring 6 be provided with groove 7 or the boss 8 that can produce the rigidity distortion, further, allow the material of power ring 6 be mild steel or anti--30 ℃ to the low temperature steel of-80 ℃, allow power ring 6 two and horizontal freezing pipe 1 butt welding be integrated, also can be enclosed within horizontal freezing pipe 1 outer wall or laterally freezing pipe 1 inwall overlap welding be integrated.

After installing, from the feed pipe interface 5 of this device side to freezing in pipeline A3 to continue to feed the liquid nitrogen as freezing refrigerant, start frozen construction, the evaporation process of dependence liquid nitrogen is taken away the heat on stratum, the gas that liquid nitrogen vaporization produces is simultaneously discharged this freezing plant by escape pipe 2, thereby below implement device, subgrade and pavement freezes.Monitoring frozen region intensity, after the intensity of frozen soil reaches requirement, vehicle gets final product fast passing.

Claims

1. a film covering type liquid nitrogen freezing device, what comprise bottom freezes pipeline (A3), it is characterized in that, also comprises the thermal insulation separation thermosphere (A2) at middle part and the load-bearing surface layer (A1) at top; Freeze pipeline (A3) and comprise horizontal freezing pipe (1) and vertical freezing pipe (3), be communicated with by vertical freezing pipe (3) between adjacent two horizontal freezing pipes (1); Every horizontal freezing pipe (1) top, two ends is equipped with escape pipe (2), and escape pipe (2) passes thermal insulation separation thermosphere (A2) and exposed with atmosphere and be connected by load-bearing surface layer (A1); Every horizontal freezing pipe (1) one port also is provided with linkage (4); Wherein a lateral surface that is positioned at the horizontal freezing pipe (1) in the outside is provided with feed pipe interface (5).

2. a kind of film covering type liquid nitrogen freezing device according to claim 1, it is characterized in that, described load-bearing surface layer (A1) with horizontal freezing pipe (1) parallel direction on length be 4-6m, with vertical freezing pipe (3) parallel direction on length be greater than by the twice of vehicle single-wheel width.

3. a kind of film covering type liquid nitrogen freezing device according to claim 1, is characterized in that, described escape pipe (2) mouth of pipe with vertical freezing pipe (3) parallel direction on spacing be greater than by the width of vehicle single-wheel.

4. a kind of film covering type liquid nitrogen freezing device according to claim 1, is characterized in that, described pipeline (A3) and escape pipe (2) employing stainless steel tube or the seamless steel pipe of freezing.

5. a kind of film covering type liquid nitrogen freezing device according to claim 1, is characterized in that, described load-bearing surface layer (A1) adopts steel to make.