CN111677970A - Heat preservation method for mixing pile machine conveying pipeline in cold area - Google Patents
Heat preservation method for mixing pile machine conveying pipeline in cold area Download PDFInfo
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- CN111677970A CN111677970A CN202010377552.XA CN202010377552A CN111677970A CN 111677970 A CN111677970 A CN 111677970A CN 202010377552 A CN202010377552 A CN 202010377552A CN 111677970 A CN111677970 A CN 111677970A
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- heat
- tracing band
- cement mortar
- rubber
- conveying pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/34—Heating of pipes or pipe systems using electric, magnetic or electromagnetic fields, e.g. using induction, dielectric or microwave heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/18—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A heat preservation method for a mixing pile machine conveying pipeline in a cold area is characterized by comprising the following steps: a. winding a cement mortar conveying pipeline by using an electric tracing band, b, integrally wrapping the tracing band and the cement mortar conveying pipeline by using a rubber and plastic heat-insulating sleeve, c, fixing the rubber and plastic heat-insulating pipe by using a plurality of plastic buckles, d, matching the electric tracing band with an automatic temperature control device, and e, selecting a medium-temperature reinforced type for the electric tracing band. The heat preservation method for the mixing pile machine conveying pipeline in the cold area has the advantages that the device structure is simple, the construction is convenient, cement mortar is heated and preserved heat by the heat tracing band in the conveying process, the cement mortar is prevented from freezing and blocking the pipe in the conveying process, the production efficiency is improved, the temperature of the cement mortar entering the pile foundation is guaranteed, the pile body strength increasing speed is guaranteed, the pile foundation maintenance time is reduced, the construction period is shortened, the cement mortar is heated and preserved heat by the heat tracing band in the conveying process, and the cement mortar is prevented from freezing and blocking the pipe in the conveying process and is prevented from being continuously constructed.
Description
Technical Field
The invention relates to a heat preservation method of a pipeline, in particular to a heat preservation method of a mixing pile machine conveying pipeline in a cold region.
Background
In the project for rebuilding the east-side (third stage) shed of the second bridge in 2019 of the Songyuan, the 1-25# buildings and underground garages, the design of pile foundation foundations is totally cement mortar mixing piles, the total number of the pile foundations is 38900, and the number is huge. Similar situations are also common in other civil projects, residential buildings, office buildings, etc. with similar ground treatment. The number of the pile machines for project approach construction is 20 and the continuous 24-hour operation is required. The traditional cement mortar conveying mode of the cement mortar mixing pile adopts a booster to convey cement mortar prepared in a background positioned on the periphery of a foundation pit to a pile machine through a plastic pipeline, and the length of the pipeline is about one hundred meters to two hundred meters according to the size of a ground reservoir. The operation mode has various defects 1, the day and night temperature difference of cold areas in loose sites is large, the construction temperature at night is low, and cement mortar is easy to freeze and block pipes in the conveying process; 2. the temperature of cement mortar conveyed into the pile foundation is too low, the increase speed of the pile body strength is slow, and the maintenance time of the pile foundation is prolonged; 3. the cement mortar is difficult to dredge after freezing and blocking the pipe, and time and labor are wasted, so that the efficiency is low; 4. the cement mortar is unclogged after freezing and blocking the pipe, so that the pile is broken, and the quality of the pile body cannot be ensured
Chinese patent CN108916522A discloses in 2018, 11/30, a petroleum pipeline insulating jacket, which comprises an electrothermal film and an insulating layer, wherein the electrothermal film is arranged at the innermost layer, the insulating layer is arranged at the outer side of the electrothermal film, the insulating layer comprises a polyurethane layer and a phenolic resin plate layer, the polyurethane layer is arranged outside the electrothermal film, the phenolic resin plate layer is arranged at the outer side of the polyurethane layer, and a vacuum layer is arranged between the electrothermal film and the insulating layer. Although the technical scheme can ensure the heat preservation of the petroleum pipeline, the vacuum layer between the electric heating film and the heat preservation layer is difficult to arrange, and the system cost for maintaining the vacuum state is high.
The known methods of insulating pipes therefore suffer from the various inconveniences and problems described above.
Disclosure of Invention
The invention aims to provide a safe and reliable heat preservation method for a mixing pile machine conveying pipeline in a cold region.
In order to achieve the purpose, the technical solution of the invention is as follows:
a heat preservation method for a mixing pile machine conveying pipeline in a cold area is characterized by comprising the following steps:
a. cement mortar conveying pipeline wound by electric tracing band
Uniformly winding the electric tracing band on the cement mortar conveying pipeline in a spiral shape according to the length of each meter of pipeline, and fixing the electric tracing band on the cement mortar conveying pipeline by using an aluminum adhesive tape along the spiral direction;
b. integrally wrapping heat tracing band and cement mortar conveying pipe by using rubber and plastic heat-insulating sleeve
The outer layer of the electric tracing band integrally wraps the tracing band and the cement mortar conveying pipe by using a rubber and plastic heat-insulating sleeve, so that the tightness of the integral wrapping is ensured, the heat-insulating property of the cement mortar conveying pipeline system is achieved, external cold air is isolated, and the temperature loss of the tracing band is reduced;
c. fixing the rubber-plastic heat-insulating pipe by a plurality of plastic buckles
Fixing the rubber-plastic heat-insulating pipes at intervals of 300mm by using plastic buckles so as to tightly clamp the cement mortar conveying pipe, the electric tracing band and the rubber-plastic heat-insulating sleeve;
d. the electric tracing band is matched with an automatic temperature control device, the action voltage of the automatic temperature control device is 240V alternating current, the temperature control precision is 1 ℃, and the control mode is PID control and self-tuning control;
e. the electric tracing band is selected to be of a medium-temperature reinforced type, a conductor of the medium-temperature reinforced type is 7 x 0.5 oxygen-free tin-plated copper, a heating device is a PTC polymer semiconductor, the power supply voltage is 220V, the lowest installation temperature is-40 ℃, the highest maintenance temperature is 105 ℃, and the highest tolerance temperature is 135 ℃.
The heat preservation method for the mixing pile machine conveying pipeline in the cold area can be further realized by adopting the following technical measures.
The method of the foregoing, wherein the electric tracing band is an automatic temperature control electric tracing band.
In the method, the rubber-plastic heat-insulating sleeve and the heat-insulating material meet the international environmental protection certification requirement, the fireproof performance meets the national standard, and the rubber-plastic heat-insulating sleeve is soft and elastic in texture.
In the method, the rubber-plastic heat-insulating material of the rubber-plastic heat-insulating sleeve is rich in flexibility, and can be installed together with the pipeline after the rubber-plastic heat-insulating sleeve and the pipeline are sleeved, or the rubber-plastic heat-insulating material of the rubber-plastic heat-insulating sleeve is longitudinally cut and firmly bonded by using glue or an adhesive tape after the pipeline is wrapped.
The method wherein the plastic snap fits a certain amount of deformation to facilitate installation.
In the method, the insulating material of the electric tracing band is double-layer flame-retardant polyolefin.
After the technical scheme is adopted, the heat preservation method for the mixing pile machine conveying pipeline in the cold area has the following advantages:
1. the device has simple structure and convenient construction, cement mortar is heated and insulated by the heat tracing band in the conveying process, the cement mortar is prevented from freezing and blocking pipes in the conveying process, and the production efficiency is improved;
2. the temperature of cement mortar entering the pile foundation is guaranteed, the strength increase speed of the pile body is guaranteed, the maintenance time of the pile foundation is reduced, and the construction period is shortened;
3. the cement mortar is heated by the heat tracing band and is insulated in the conveying process, so that the cement mortar is prevented from freezing and blocking the pipe in the conveying process, the pile body is continuously constructed, and the quality is ensured.
Drawings
FIG. 1 is a schematic diagram of a heat-insulating structure of a conveying pipeline of a mixing pile machine according to an embodiment of the invention;
fig. 2 is a side view of fig. 1.
In the figure: 1 cement mortar conveying pipe, 2 heat tracing bands, 3 rubber and plastic heat-insulating sleeves and 4 plastic buckles.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The heat-insulating pipeline of the mixing pile machine conveying pipeline comprises a cement mortar conveying pipe 1, a heat tracing band 2, a rubber-plastic heat-insulating sleeve 3 and a plastic buckle 4 from the inner layer to the outer layer.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a heat insulation structure of a conveying pipeline of a mixing pile machine according to an embodiment of the present invention, and fig. 2 is a side view of fig. 1. As shown in the figure, the outer side of the cement mortar conveying pipe is wound with a heat tracing band 2, then a rubber and plastic heat-insulating sleeve 3 is added, and finally a plastic buckle 4 is arranged on the outer side of the rubber and plastic heat-insulating sleeve.
The invention discloses a heat preservation method for a mixing pile machine conveying pipeline in a cold area, which comprises the following steps of:
1. and winding the cement mortar conveying pipe by adopting an automatic temperature control electric tracing band. In order to increase the heating area, a spiral winding mode can be adopted, the electric tracing band is uniformly wound on the pipeline in a spiral shape according to the length of each meter of the pipeline, the electric tracing band is fixed along the spiral direction by using an aluminum adhesive tape, the electric tracing band dissipates certain heat, and the heat loss of the heat tracing pipeline is supplemented through direct or indirect heat exchange so as to achieve the purposes of temperature rise, heat preservation and freeze prevention, so that cement mortar is heated and heat preserved in the conveying process.
2. The outer layer is made of a rubber-plastic heat-insulating sleeve, the heat-insulating material meets the requirement of international environmental protection certification, the fireproof performance meets the national standard, and the rubber-plastic heat-insulating sleeve is soft in texture and high in elasticity. The heat tracing band and the cement mortar conveying pipe are integrally wrapped. The rubber-plastic heat-insulating material is rich in flexibility, can be installed together with the pipeline after being sleeved on the pipeline, and can also be adhered by glue or adhesive tape after the heat-insulating material is longitudinally cut and wrapped on the pipeline, so that the tightness of the whole system is ensured, the heat-insulating property of the whole system is ensured, external cold air is isolated, and the temperature loss of the heat tracing band is reduced.
3. And fixing the rubber-plastic heat-insulating pipe by plastic buckles every 300mm to enable the cement mortar conveying pipe, the automatic temperature control electric tracing band and the rubber-plastic heat-insulating sleeve to form a whole. The buckle needs to select a proper deformation amount, and too large or too small deformation amount can cause difficult installation, insecurity and even impossible installation.
4. And (4) selecting an automatic temperature control device. The automatic temperature control device can select TL series products, the action voltage is 240V alternating current, the temperature control precision is 1 ℃, the control mode is PID control and self-tuning control, the input mode is K/E/J/R/S/B/N/T/PT100/CU50 adjustable, and the output mode is a relay or SSR solid state relay.
5. And (4) selecting electric tracing. The electric tracing band can be selected to be reinforced at medium temperature, the conductor of the type is 7 x 0.5 oxygen-free tin-plated copper, the heating device is a PTC polymer semiconductor, the power supply voltage is 220V, the lowest installation temperature is-40 ℃, the highest maintenance temperature is 105 ℃, and the highest tolerance temperature is 135 ℃. The standard power is 35W/45W/60W at 10 ℃. The main insulating material is double-layer flame-retardant polyolefin.
The heat preservation device of the heat preservation method for the mixing pile machine conveying pipeline in the cold area has the advantages of simple structure and convenience in construction, cement mortar is heated and preserved by the heat tracing band in the conveying process, pipe blockage caused by freezing of the cement mortar in the conveying process is prevented, production efficiency is improved, progress of pile foundation construction is smooth, all workload is fully completed in the planned progress, construction period is saved, and pile body quality is guaranteed.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (6)
1. A heat preservation method for a mixing pile machine conveying pipeline in a cold area is characterized by comprising the following steps:
a. cement mortar conveying pipeline wound by electric tracing band
Uniformly winding the electric tracing band on the cement mortar conveying pipeline in a spiral shape according to the length of each meter of pipeline, and fixing the electric tracing band on the cement mortar conveying pipeline by using an aluminum adhesive tape along the spiral direction;
b. integrally wrapping heat tracing band and cement mortar conveying pipe by using rubber and plastic heat-insulating sleeve
The outer layer of the electric tracing band integrally wraps the tracing band and the cement mortar conveying pipe by using a rubber and plastic heat-insulating sleeve, so that the tightness of the integral wrapping is ensured, the heat-insulating property of the cement mortar conveying pipeline system is achieved, external cold air is isolated, and the temperature loss of the tracing band is reduced;
c. fixing the rubber-plastic heat-insulating pipe by a plurality of plastic buckles
Fixing the rubber-plastic heat-insulating pipes at intervals of 300mm by using plastic buckles so as to tightly clamp the cement mortar conveying pipe, the electric tracing band and the rubber-plastic heat-insulating sleeve;
d. the electric tracing band is matched with an automatic temperature control device, the action voltage of the automatic temperature control device is 240V alternating current, the temperature control precision is 1 ℃, and the control mode is PID control and self-tuning control;
e. the electric tracing band is selected to be of a medium-temperature reinforced type, a conductor of the medium-temperature reinforced type is 7 x 0.5 oxygen-free tin-plated copper, a heating device is a PTC polymer semiconductor, the power supply voltage is 220V, the lowest installation temperature is-40 ℃, the highest maintenance temperature is 105 ℃, and the highest tolerance temperature is 135 ℃.
2. The method for preserving heat of a mixing pile machine conveying pipeline in a cold region as claimed in claim 1, wherein the electric tracing band is an automatic temperature control electric tracing band.
3. The heat preservation method for the mixing pile machine conveying pipeline in the cold area as claimed in claim 1, wherein the rubber plastic heat preservation sleeve, the heat preservation material, and the fire resistance meet the national standard, and are soft and elastic.
4. The method for preserving heat of the conveying pipeline of the mixing pile machine in the cold region as claimed in claim 1, wherein the rubber-plastic heat-preservation material of the rubber-plastic heat-preservation sleeve is rich in flexibility, and the rubber-plastic heat-preservation sleeve and the pipeline can be mounted together after being sleeved, or the rubber-plastic heat-preservation material of the rubber-plastic heat-preservation sleeve is longitudinally cut and is firmly bonded by glue or adhesive tape after being wrapped on the pipeline.
5. The method for preserving heat of the conveying pipeline of the mixing pile machine in the cold region as claimed in claim 1, wherein the plastic buckle can adapt to a certain deformation amount to facilitate installation.
6. The method for preserving heat of the conveying pipeline of the mixing pile machine in the cold region as claimed in claim 1, wherein the insulating material of the electric tracing band is double-layer flame-retardant polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010377552.XA CN111677970A (en) | 2020-05-07 | 2020-05-07 | Heat preservation method for mixing pile machine conveying pipeline in cold area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010377552.XA CN111677970A (en) | 2020-05-07 | 2020-05-07 | Heat preservation method for mixing pile machine conveying pipeline in cold area |
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| CN111677970A true CN111677970A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010377552.XA Pending CN111677970A (en) | 2020-05-07 | 2020-05-07 | Heat preservation method for mixing pile machine conveying pipeline in cold area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709882A (en) * | 2020-12-25 | 2021-04-27 | 博迈科海洋工程股份有限公司 | Control method of electric tracing self-adaptive system of polar region oil and gas pipeline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202349498U (en) * | 2011-11-28 | 2012-07-25 | 洋紫荆油墨（河北）有限公司 | Electric tracing pipe |
| CN204435788U (en) * | 2015-01-13 | 2015-07-01 | 申如意 | A kind of body of wall root protection mechanism |
| CN205350691U (en) * | 2016-02-02 | 2016-06-29 | 浠水晨科饲料科技有限公司 | A conveyer pipe for vegetable oil is prevented solidifying |
| CN206018123U (en) * | 2016-07-15 | 2017-03-15 | 中交二公局第三工程有限公司 | A kind of water system for highlands concrete mixing station |
-
2020
- 2020-05-07 CN CN202010377552.XA patent/CN111677970A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202349498U (en) * | 2011-11-28 | 2012-07-25 | 洋紫荆油墨（河北）有限公司 | Electric tracing pipe |
| CN204435788U (en) * | 2015-01-13 | 2015-07-01 | 申如意 | A kind of body of wall root protection mechanism |
| CN205350691U (en) * | 2016-02-02 | 2016-06-29 | 浠水晨科饲料科技有限公司 | A conveyer pipe for vegetable oil is prevented solidifying |
| CN206018123U (en) * | 2016-07-15 | 2017-03-15 | 中交二公局第三工程有限公司 | A kind of water system for highlands concrete mixing station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709882A (en) * | 2020-12-25 | 2021-04-27 | 博迈科海洋工程股份有限公司 | Control method of electric tracing self-adaptive system of polar region oil and gas pipeline |
| CN112709882B (en) * | 2020-12-25 | 2022-09-16 | 博迈科海洋工程股份有限公司 | Control method of electric tracing self-adaptive system of polar region oil and gas pipeline |
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Application publication date: 20200918 |
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| RJ01 | Rejection of invention patent application after publication |