CN101775796B - Unplugging-free freezer - Google Patents
Unplugging-free freezer Download PDFInfo
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- CN101775796B CN101775796B CN 200910250149 CN200910250149A CN101775796B CN 101775796 B CN101775796 B CN 101775796B CN 200910250149 CN200910250149 CN 200910250149 CN 200910250149 A CN200910250149 A CN 200910250149A CN 101775796 B CN101775796 B CN 101775796B
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- plastic pipe
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- heavy wall
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Abstract
The invention discloses an unplugging-free freezer used in tunnel construction, which mainly solves the problems of easily damaged cutter head, long time-consuming construction and high cost of the conventional freezer during the advance of a shield. The unplugging-free freezer is characterized in that: a freezing pipe (3) and upper and lower blanking plates (6,7) are all made of thin-walled aluminum or copper materials; a thick-walled plastic pipe (4) is arranged in the freezing pipe (3), wherein grooves (9) are formed at the outer periphery of the thick-walled plastic pipe (4) and central holes communicated with a feed pipe (1) are formed in the thick-walled plastic pipe (4); and strutting pieces (5) are arranged between the thick-walled plastic pipe (4) and the lower blanking plate (7). The freezer can be left in a frozen soil wall without being unplugged after the frozen soil wall reaches a designed thickness; the front end cutter head of the shield can easily cut the freezer distributed in the frozen soil wall without damaging the cutter head in construction, so the project cost of a project can be effectively reduced, the project period can be shortened, and the project risk can be reduced.
Description
Technical field
The present invention relates to be applicable in a kind of constructing tunnel the frigo of freezing process reinforcing shield turnover hole, the hole soil body, specifically a kind ofly be adapted to that conventional hypothermic saline freezes and the unplugging-free freezer of liquid nitrogen freezing fast.
Background technology
The principle that freezing process is reinforced the hole soil body is to make moisture freezes in the soil body, wholely freeze the freeze solid that the soil body in the scope temporarily is formed with suitable intensity, under this freeze solid supporting, seal up a door in the dismounting hole, and treat that heading equipment enters in the portal circle, the hole sealing device installs, under the situation such as the sealing performance during entrance construction is set up the back, thaw again and enter the construction of normal turnover hole.Because freezing process is reinforced the frozen soil wall good uniformity that the hole soil body has formation, the intensity height, diaphragm wall and frozen soil wall cement, can effectively prevent the leak characteristics of quicksand of hole, so shield structure turnover hole, hole soil stabilization extensively adopts freezing process, as shown in Figure 1, A represents ground, B represents the ground diaphragm wall, and C represents the tunnel center line, and D represents shield structure direction of propulsion, E represents shield machine, F represents the boundary line, tunnel, and G represents the hole soil mass consolidation, and H represents frigo.At present, the freezing process reinforcing shield passes in and out the employed frigo of hole, the hole soil body as shown in Figure 2, and outer wall is for there being certain thickness steel pipe, and what conventional brine freezer adopted is the Q235 steel pipe, and what liquid nitrogen freezing adopted fast is stainless-steel pipe.Because the intensity height of steel pipe, the frigo that the front end knife cutting of shield structure is laid in the frozen soil wall can damage cutterhead.Therefore, the frigo that the shield structure is pushed ahead within the scope needs to pull out after frozen soil wall reaches design thickness in advance, and the backing structure could continue to push ahead.For the frigo that needs are pulled out, need be in frigo before frigo is pulled out cyclic high-temperature salt solution, make that the soil body around the frigo melts, could smoothly frigo be pulled out like this.At present, there are many weak points in the pull-out frigo form of construction work that adopts: 1) there is brittle fracture under low temperature in steel, in pulling out the process of frigo, frigo is easily from the welding position fracture, in case the frigo fracture, the part frigo is stayed in the frozen soil wall, the shield structure can only thrust, the result damages cutterhead, causes economic loss, incurs loss through delay the duration; When 2) adopting quick liquid nitrogen freezing, on the one hand, because the frozen soil wall temperature that liquid nitrogen freezing forms is extremely low, the high temperature salt solution that circulates in frigo may freeze, in case freeze, handles length consuming time, can have a strong impact on programming; On the other hand, the frigo of liquid nitrogen freezing employing is stainless steel material fast, and cost is high; 3) melt the frigo surrounding soil and will consume lot of energy, increase engineering cost; 4) process itself of pulling out frigo is incured loss through delay the duration with regard to elapsed time.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of freezing efficiency that neither influences or not the unplugging-free freezer that the shield structure advances again.This frigo is after frozen soil wall reaches design thickness, can stay within the frozen soil wall, do not pull out, the front end cutterhead of shield structure can cut easily and be laid in the frigo in the frozen soil wall and can not damage cutterhead in the construction, can effectively reduce engineering cost like this, shorten the engineering time limit, reduce engineering risk.
For achieving the above object, unplugging-free freezer of the present invention comprises the upper sealing plate that connects as one with freezing pipe, following shrouding and feed pipe, and shrouding was the aluminium or the copper material of thin-walled about described freezing pipe reached; And freezing pipe be built-in with excircle band groove, in the heavy wall plastic pipe of centre bore and feed pipe UNICOM is arranged, between heavy wall plastic pipe and base plate support member is arranged.
Groove on the described heavy wall plastic pipe excircle is the axial type groove; Groove on the described heavy wall plastic pipe excircle is the spiral groove along cylinder; Uniform salient point is arranged on the outer cylinder of described heavy wall plastic pipe; For adding the corrosion-resistant fluid sealant of low temperature, screw thread is connected between the centre bore of feed pipe and heavy wall plastic pipe; Be connected with bolt for flange between the centre bore of described feed pipe and heavy wall plastic pipe; Between heavy wall plastic pipe and support member for being threaded.
The invention has the beneficial effects as follows: the outer wall freezing pipe of frigo adopts Thin-walled Aluminum or copper pipe, with respect to steel pipe have that intensity is low, good toughness and the strong characteristics of low temperature ductility, the shield structure is pushed ahead in the process can not damage cutterhead; Prism or the lip-deep prominent point of post between the heavy wall plastic pipe excircle upper groove of placing in the frigo can play a supportive role to freezing pipe, prevent that water and soil pressure and frost-heaving force from flattening frigo; Space between groove or salient point can be used as back the passage of liquid or return-air body; Passage in the middle of the heavy wall plastic pipe can be used as the extension of feed pipe, for the circulation of liquid provides passage.This frigo is after frozen soil wall reaches design thickness, can stay within the frozen soil wall, do not pull out, the front end cutterhead of shield structure can cut easily and be laid in the frigo in the frozen soil wall and can not damage cutterhead in the construction, can effectively reduce engineering cost like this, shorten the engineering time limit, reduce engineering risk.
Description of drawings
Accompanying drawing 1 is freezing process reinforcing shield turnover hole, hole soil body schematic diagram;
Accompanying drawing 2 is the frigo that uses at present;
Accompanying drawing 3 is a structural representation of the present invention;
Accompanying drawing 6 is second kind of structural representation of sequence number 4 heavy wall plastic pipes in the accompanying drawing 1;
Accompanying drawing 7 is the third structural representation of sequence number 4 heavy wall plastic pipes in the accompanying drawing 1;
Accompanying drawing 8 is the sectional view of accompanying drawing 7;
Accompanying drawing 9 is sequence number 1 feed pipe in the accompanying drawing 1 and the flange bolt connected mode schematic diagram of sequence number 4 heavy wall plastic pipes;
Accompanying drawing 10 is the vertical view of accompanying drawing 9.
1-feed pipe among the figure, 2-liquid back pipe, 3-freezing pipe, 4-heavy wall plastic pipe, 5-support member, 6 upper sealing plates, 7 times shroudings, 8-base cone, 9-groove, 10-axial type groove, the spiral groove of 11-, 12-salient point, 13-flange, 14-and bolt.
The specific embodiment
Below in conjunction with accompanying drawing invention is described further:
Shown in accompanying drawing 3, this unplugging-free freezer mainly is made of feed pipe 1, liquid back pipe 2, freezing pipe 3, heavy wall plastic pipe 4, support member 5 and base cone 8.Wherein freezing pipe 3 is the main body of frigo, adopts the aluminium or the copper material manufacturing of thin-walled, Thin-walled Aluminum or copper pipe with respect to steel pipe have that intensity is low, toughness and the strong characteristics of low temperature ductility, the shield structure is pushed ahead in the process can not damage cutterhead; On the other hand, the heat transfer property of aluminium or copper pipe is better than steel pipe, therefore, adopts aluminium or copper pipe to have good heat-conducting as the unplugging-free freezer of freezing pipe, and freezing efficiency can not be affected; The top of freezing pipe 3 is provided with the upper sealing panel 6 with material, and the bottom is provided with the lower seal plate 7 with material, and the height of freezing pipe 3 is the height that actual needs freezes.All adopt the mode of welding to connect between feed pipe 1, liquid back pipe 2, freezing pipe 3, upper sealing panel 6, lower seal plate 7 and the base cone 8.The endoporus of freezing pipe 3 is equipped with heavy wall plastic pipe 4, the cylindrical of heavy wall plastic pipe 4 be provided be used for back liquid groove 9 as shown in Figure 4; Groove 9 can be uniform axial notch 10, it is communicated, as shown in Figure 3 with liquid back pipe 2; Also can adopt as shown in Figure 6 structure as back flow channel, on the cylinder of heavy wall plastic pipe 4, process spiral groove 11, it is communicated with liquid back pipe 2; Perhaps adopt the structure shown in accompanying drawing 7 and accompanying drawing 8, process uniform salient point 12 on the cylinder of heavy wall plastic pipe 4, the space that salient point is 12 is as back flow channel; And as the more than above-mentioned several forms of back flow channel, if having with liquid back pipe 2 UNICOMs return the liquid function, all within the protection domain of this patent; Prismatic or the outstanding salient point 12 at interval all can play a supportive role to freezing pipe 3 between the groove (10,11) on heavy wall plastic pipe 4 cylinders, prevents that water and soil pressure and frost-heaving force from flattening freezing pipe 3.The centre bore of heavy wall plastic pipe 4 and feed pipe 1 UNICOM, can be used as the extension of feed pipe 1, for the circulation of liquid provides passage, the mode that can adopt screw thread to add the corrosion-resistant fluid sealant of low temperature between the centre bore on feed pipe 1 and the heavy wall plastic pipe 4 is connected, also can adopt the connected mode of as shown in Figure 9 flange 13 and bolt 14, and 13 of feed pipe 1 and flange are fixing for welding, and bolt 14 is the fixed form of radial equipartition, as shown in Figure 10.The lower end of heavy wall plastic pipe 4 and support member 5 are for being threaded, and support member 5 is the radial equipartition setting, as shown in Figure 5, and by the supporting role of support member 5, make the bottom of its heavy wall plastic pipe 4 leave bottom one segment distance of freezing pipe 3, guarantee normally carrying out of circulation.
This unplugging-free freezer is adapted to conventional hypothermic saline and freezes and liquid nitrogen freezing use fast.When adopting quick liquid nitrogen freezing, the groove 9 of heavy wall plastic pipe 4 can be used as the passage that returns gas, and liquid back pipe 2 is muffler.
When freezing, hypothermic saline or liquid nitrogen are through feed pipe 1 under the certain pressure effect, enter the bottom of heavy wall plastic pipe 4 then along the centre bore of heavy wall plastic pipe 4, reach bottom back on heavy wall plastic pipe 4 cylindricals groove 9 or the space of 12 of salient points upwards flow, interchange of heat take place in nitrogen in the process of flowing that makes progress after hypothermic saline or the vaporization and freezing pipe 3, freezing pipe 3 again with the soil body generation interchange of heat of exterior circumferential, cold is passed to the soil body on every side, cooling soil body finally forms the frozen soil wall of designing requirement.When this frigo after frozen soil wall reaches design thickness, can stay within the frozen soil wall, do not pull out, the front end cutterhead of shield structure can cut easily and be laid in the frigo in the frozen soil wall and can not damage cutterhead in the construction, can effectively reduce engineering cost like this, shorten the engineering time limit, reduce engineering risk.
Claims (7)
1. a unplugging-free freezer comprises the upper sealing plate (6) that connects as one with freezing pipe (3), following shrouding (7) and feed pipe (1), and it is characterized in that: shrouding (6,7) was the aluminium or the copper material of thin-walled about freezing pipe (3) reached; And freezing pipe (3) be built-in with excircle band groove (9), in the heavy wall plastic pipe (4) of centre bore and feed pipe (1) UNICOM is arranged, between heavy wall plastic pipe (4) and base plate (7) support member (5) is arranged.
2. unplugging-free freezer according to claim 1 is characterized in that: the groove (9) on heavy wall plastic pipe (4) excircle is an axial type groove (10).
3. unplugging-free freezer according to claim 1 is characterized in that: the groove (9) on heavy wall plastic pipe (4) excircle is along the spiral groove of cylinder (11).
4. unplugging-free freezer according to claim 1 is characterized in that: uniform salient point (12) is arranged on the outer cylinder of heavy wall plastic pipe (4).
5. unplugging-free freezer according to claim 1 is characterized in that: be connected for screw thread adds the corrosion-resistant fluid sealant of low temperature between the centre bore of feed pipe (1) and heavy wall plastic pipe (4).
6. unplugging-free freezer according to claim 1 is characterized in that: be connected with bolt (14) for flange (13) between the centre bore of feed pipe (1) and heavy wall plastic pipe (4).
7. unplugging-free freezer according to claim 1 is characterized in that: between heavy wall plastic pipe (4) and support member (5) for being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250149 CN101775796B (en) | 2009-11-30 | 2009-11-30 | Unplugging-free freezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250149 CN101775796B (en) | 2009-11-30 | 2009-11-30 | Unplugging-free freezer |
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| Publication Number | Publication Date |
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| CN101775796A CN101775796A (en) | 2010-07-14 |
| CN101775796B true CN101775796B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910250149 Active CN101775796B (en) | 2009-11-30 | 2009-11-30 | Unplugging-free freezer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005663A (en) * | 2017-12-18 | 2018-05-08 | 上海市基础工程集团有限公司 | Export ＆ import exempts from tube drawing consolidation by freezing construction method |
| CN110984123B (en) * | 2019-11-15 | 2020-10-20 | 中国矿业大学 | Spiral liquid nitrogen freezer with external liquid supply pipe and method |
| CN112127895B (en) * | 2020-09-23 | 2022-06-28 | 北京中煤矿山工程有限公司 | Device for quickly processing broken pipe of horizontal freezing hole and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3257298B2 (en) * | 1994-11-16 | 2002-02-18 | 松下電器産業株式会社 | CRC code generation method |
| CN2627061Y (en) * | 2003-06-20 | 2004-07-21 | 中国矿业大学 | Liquid nitrogen partial freezing equipment |
| CN201539261U (en) * | 2009-11-30 | 2010-08-04 | 北京中煤矿山工程有限公司 | Pull-out-free freezing device |
-
2009
- 2009-11-30 CN CN 200910250149 patent/CN101775796B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3257298B2 (en) * | 1994-11-16 | 2002-02-18 | 松下電器産業株式会社 | CRC code generation method |
| CN2627061Y (en) * | 2003-06-20 | 2004-07-21 | 中国矿业大学 | Liquid nitrogen partial freezing equipment |
| CN201539261U (en) * | 2009-11-30 | 2010-08-04 | 北京中煤矿山工程有限公司 | Pull-out-free freezing device |
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| Publication number | Publication date |
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| CN101775796A (en) | 2010-07-14 |
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