1. The utility model provides a prevent device that pipeline damaged because of medium solidification inflation sets up between transport pipeline (1) between adjacent two department valves (2), its characterized in that: including laying in rubber tube (6) of transportation pipeline (1) inboard bottom, rubber tube (6) both ends extend to transportation pipeline (1) outside from flange (3) department that transportation pipeline (1) bottom was seted up, and its tip an organic whole is provided with annular fastening sealing ring (7) and seals through valve inside (8), flange piece (4) are installed through fastening bolt (5) in flange (3) outside, flange piece (4) and flange (3) will fasten sealing ring (7) gland seal, it has the air to fill through the air compressor machine in rubber tube (6), and its inside air volume is greater than the volume increase when transportation pipeline (1) inside medium solidifies.

2. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium, according to claim 1, wherein: a plurality of reinforcing ribs (9) are arranged in the rubber tube (6) at equal intervals along the axial direction of the rubber tube.

3. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium, according to claim 1, wherein: an electric tracing band (10) penetrates through the rubber tube (6), and leads at two ends of the electric tracing band (10) penetrate out of the end part of the rubber tube (6) and are in sealing fit with the rubber tube (6).

4. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium as claimed in claim 3, wherein: the outer side of the electric tracing band (10) is sleeved with a protective sleeve (11).

5. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium as claimed in claim 3, wherein: the electric tracing band (10) adopts an anti-corrosion waterproof type automatic temperature control electric tracing band, the set working temperature is not higher than 20 ℃, and the working power of the electric tracing band needs to maintain the temperature of the medium in the transportation pipeline (1) to be more than 5 ℃ of the freezing point of the medium.

6. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium, according to claim 5, wherein: the air valve is characterized in that a thermometer (12) and a first pressure gauge (13) for measuring the temperature and the pressure of the medium inside the air valve are respectively arranged on the conveying pipeline (1), a second pressure gauge (14) for measuring the air pressure inside the air valve is arranged on the rubber tube (6) on the inner side of the air valve core (8), and an air flow meter (15) is arranged between the air valve core (8) and the air compressor.

7. The device for preventing the pipeline from being damaged due to the solidification and expansion of the medium, according to claim 6, wherein: the device also comprises a central controller used for adjusting the medium flow in the conveying pipeline (1) and the air filling volume in the rubber tube (6), the central controller is respectively electrically connected with the valve (2), the thermometer (12), the first pressure gauge (13), the second pressure gauge (14), the air compressor and the air flow meter (15), the air filling volume in the rubber tube (6) is calculated by adopting the following formula,

ΔV=[P₁V₁T₂/(P₂T₁)-V₁] *（1+X），

wherein DeltaV represents the volume of the interior of the rubber tube (6) needing to be filled with air, P₁Indicating the medium pressure indicated by a first pressure gauge (13) or the air pressure, P, inside the rubber tube (6) indicated by a second pressure gauge (14) before the medium in the conveying pipeline (1) solidifies₂Indicating the air pressure, V, inside the rubber tube (6) as indicated by a second pressure (14) gauge after the medium in the transport pipe (1) has solidified₁Represents the volume T of the medium in the transport pipe (1) before the medium solidifies₁Indicating the temperature, T, of the medium as indicated by the thermometer before the solidification of the medium in the transport pipe (1)₂The freezing point of the medium in the transportation pipeline (1) is shown, and X represents the surplus coefficient, and the value range of the surplus coefficient is 2-5%.

8. The apparatus for preventing the damage of the pipeline caused by the solidification and expansion of the medium according to claim 7, wherein: and the end parts of the two sides of the rubber tube (6) are respectively provided with an air compressor connected with the valve core (8) of the rubber tube.

9. A construction method for use in the installation of the apparatus for preventing damage of a pipe due to solidification and expansion of a medium according to any one of claims 1 to 8, comprising the steps of:

step one, mounting a connecting flange (3), mounting the connecting flange (3) at the bottom of a conveying pipeline (1) between two valves (2), and polishing the interior of the conveying pipeline (1) smoothly;

step two, manufacturing an electric tracing rubber pipe, selecting a rubber pipe (6) with a proper pipe diameter and an electric tracing band (10) with a proper type according to the pipe diameter of the conveying pipeline (1) and the type of a conveying medium in the conveying pipeline, sleeving a protective sleeve (11) on the outer side of the electric tracing band (10), and penetrating the protective sleeve into the rubber pipe (6);

step three, performance testing, namely, carrying out electric tracing band (10) insulation performance testing and rubber tube (6) air tightness performance testing on the manufactured electric tracing band rubber tube and confirming that the detection result is qualified;

fourthly, installing an electric tracing rubber pipe, laying the rubber pipe (6) penetrated with the electric tracing band (10) at the bottom of the inner side of the transportation pipeline (1) in a full length way, and pressing and sealing the two ends of the rubber pipe through a flange sheet (4) and a fastening bolt (5);

and step five, the system is put into operation, after the electric heat tracing rubber pipe is installed, the conveying pipeline (1) is filled with medium and normally operated under pressure, before the temperature of the operating environment in winter reaches the medium solidifying point, if the system needs to normally operate and continuous power supply conditions are met on site, the medium flow in the conveying pipeline (1) is reduced through the valve (2), the air compressor is started to fill a proper amount of air into the rubber pipe (6), and the electric heat tracing belt (10) is connected for supplying heat, if the system stops operating, but the medium in the conveying pipeline (1) cannot be discharged or is not discharged economically, the air compressor is started to fill a proper amount of air into the rubber pipe (6), and the volume of the air in the rubber pipe (6) is larger than the volume increment when the medium in the conveying pipeline (1) is solidified.

10. A construction method according to claim 9, characterized in that: and in the fifth step, after the medium in the conveying pipeline (1) is solidified, the air pressure in the rubber pipe (6) is smaller than the maximum allowable pressure bearing value of the rubber pipe (6) and the conveying pipeline (1).

Background

In northern cold regions, the situation that pipelines are damaged and damaged due to solidification and expansion of liquid media because of imperfect heat preservation of water supply or other liquid medium pipelines or heat supply of continuous heat sources (such as electric tracing) is not carried out although a heat preservation structure is arranged frequently occurs, and other articles are polluted and damaged due to melting and leakage of the damaged media of the pipelines when the temperature returns in the next year, so that the normal operation of the system is seriously influenced.

Disclosure of Invention

The invention aims to provide a device for preventing a pipeline from being damaged due to solidification and expansion of a medium and a construction method thereof, so as to solve the technical problems in the background art.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the utility model provides a prevent device that pipeline damaged because of medium solidification inflation sets up between the transport pipe way between adjacent two valves, including laying the rubber tube in the inboard bottom of transport pipe way, the flange department that the rubber tube both ends were seted up from the transport pipe way bottom extends to the transport pipe way outside, and its tip an organic whole is provided with annular fastening sealing ring and seals through the valve inside, the flange piece is installed through fastening bolt in the flange outside, flange piece and flange are with fastening sealing ring gland seal, it has the air to fill through the air compressor machine in the rubber tube, and its inside air volume is greater than the volume increase volume when the inside medium of transport pipe way solidifies, during non-winter operation, can not fill the notes air in the rubber tube to increase the effective transportation space of medium in the transport pipe way.

Preferably, in order to prevent the rubber tube from expanding unevenly and affecting the uniform flow of the medium in the transportation pipeline, a plurality of reinforcing ribs are arranged in the rubber tube at equal intervals along the axial direction of the rubber tube.

Preferably, an electric tracing band penetrates through the rubber tube, and conducting wires at two ends of the electric tracing band penetrate out of the end part of the rubber tube and are in sealing fit with the rubber tube.

Preferably, a protective sleeve is sleeved outside the electric tracing band.

Preferably, the electric tracing band adopts an anti-corrosion waterproof type automatic temperature control electric tracing band, the set working temperature is not higher than 20 ℃ so as to avoid the adverse effect of overhigh temperature on the elastic performance of the rubber tube, and the working power of the electric tracing band needs to maintain the temperature of the medium in the conveying pipeline to be more than 5 ℃ of the freezing point of the medium.

Preferably, a thermometer and a first pressure gauge for measuring the temperature and the pressure of the medium inside the valve core are respectively arranged on the conveying pipeline, a second pressure gauge for measuring the air pressure inside the valve core is arranged on the rubber tube on the inner side of the valve core, and an air flow meter is arranged between the valve core and the air compressor.

Preferably, the device also comprises a central controller used for adjusting the medium flow inside the conveying pipeline and the air filling volume inside the rubber pipe, the central controller is respectively electrically connected with the valve, the thermometer, the first pressure gauge, the second pressure gauge, the air compressor and the air flow meter, the central controller obtains the real-time medium temperature and the operating pressure in the pipeline through the thermometer and the first pressure gauge, controls the opening and closing and the working power of the air compressor and the electric tracing band according to the real-time medium temperature, automatically calculates the air filling volume according to the monitoring data of each instrument and correspondingly adjusts the medium flow at the valve, and the air filling volume inside the rubber pipe is calculated by adopting the following formula,

ΔV=[P₁V₁T₂/(P₂T₁)-V₁] *（1+X），

where Δ V represents the volume of the rubber tube interior to be filled with air, P₁The medium pressure displayed by the first pressure gauge or the air pressure inside the rubber pipe, P, displayed by the second pressure gauge before the medium in the conveying pipeline is solidified₂The air pressure V inside the rubber pipe is displayed by a second pressure gauge after the medium in the conveying pipeline is solidified₁Indicating the volume of the medium in the transport pipe before it solidifies, T₁Indicating the temperature, T, of the medium before the solidification of the medium in the transport pipe₂The freezing point of the medium in the transportation pipeline is shown, and X represents the surplus coefficient, and the value range of the surplus coefficient is 2-5%.

Preferably, for the efficiency of filling the air into the rubber tube, rubber tube both sides tip all is provided with an air compressor machine rather than the valve core continuous, and this section rubber tube is aerifyd the back that finishes, the air compressor machine can move to other rubber tube section departments and use, and concrete shift position carries out according to the central controller suggestion.

In addition, the invention also provides a construction method of the device for preventing the pipeline from being damaged due to solidification and expansion of the medium, which mainly comprises the following steps:

step one, mounting a connecting flange, mounting the connecting flange at the bottom of a conveying pipeline between two valves, and polishing the inside of the conveying pipeline (such as the position of the connecting flange and a welding seam of a steel pipe with a seam or a steel pipe with a spiral seam) smoothly to prevent burrs from damaging a rubber pipe;

step two, manufacturing an electric tracing rubber pipe, selecting a rubber pipe with a proper pipe diameter and an electric tracing band with a proper type according to the pipe diameter of the conveying pipeline and the type of a conveying medium in the conveying pipeline, sleeving a protective sleeve on the outer side of the electric tracing band and penetrating the protective sleeve into the rubber pipe;

step three, performance testing, namely, carrying out electric tracing band insulation performance testing and rubber tube air tightness performance testing on the manufactured electric tracing band rubber tube and confirming that the detection result is qualified;

step four, installing electric tracing rubber pipes, laying the rubber pipes with the electric tracing bands in the bottom of the inner side of the conveying pipeline in a full length mode, and tightly pressing and sealing the two ends of the rubber pipes through flange sheets and fastening bolts, wherein the electric tracing rubber pipes are installed in sections in the area between the two valves on the conveying pipeline in order to avoid influencing the closing performance of the valves;

and step five, the system is put into operation, after the electric heat tracing rubber pipe is installed, the conveying pipeline is filled with medium to normally operate under pressure, when the temperature of the operating environment in winter reaches the medium solidifying point, if the system needs to normally operate and continuous power supply conditions are met on site, the medium flow in the conveying pipeline is reduced through a valve, the air compressor is started to fill a proper amount of air into the rubber pipe, the electric heat tracing belt is connected for supplying heat, if the system stops operating, but the medium in the conveying pipeline cannot be discharged or is not discharged economically, the air compressor is started to fill a proper amount of air into the rubber pipe, and the volume of the air in the rubber pipe is larger than the volume increment when the medium in the conveying pipeline is solidified.

Preferably, in order to ensure that the rubber tube and the transportation pipeline work normally, in the fifth step, after the medium in the transportation pipeline is solidified, the air pressure in the rubber tube is smaller than the maximum allowable pressure-bearing value of the rubber tube and the transportation pipeline.

Compared with the prior art, the invention has the beneficial effects that:

1. the rubber pipe is arranged in the conveying pipeline and is filled with a proper amount of air, so that an enough accommodating space is provided for the volume expansion caused by the solidification of the medium in the conveying pipeline, the pipeline damage caused by the solidification and expansion of the medium in the conveying pipeline can be avoided under the condition of no continuous power supply, and the rubber pipe conveying pipeline is suitable for short-time shutdown protection of the large-caliber long-distance conveying pipeline;

2. the electric tracing band is arranged in the rubber pipe, triple insulation protection is realized on the outer side of the electric tracing band through the protective sleeve, the filled air and the rubber pipe, the safety is better, the electric tracing band is arranged at the bottom of the transportation pipeline along with the rubber pipe, the heat convection of liquid is fully utilized, the heat generated by the electric tracing band is utilized to the maximum extent, the medium in the transportation pipeline is uniformly heated, the heat loss is reduced, and the transportation pipeline provided with the electric tracing band does not need to discharge the medium in the transportation pipeline, the transportation pipeline of the system is in a quasi-working state at any time, and the normal operation of the system can be recovered in the shortest time when required.

Drawings

The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 taken at section A-A;

fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Reference numerals: the method comprises the following steps of 1-conveying pipeline, 2-valve, 3-connecting flange, 4-flange sheet, 5-fastening bolt, 6-rubber tube, 7-fastening sealing ring, 8-valve core, 9-reinforcing rib, 10-electric tracing band, 11-protective sleeve, 12-thermometer, 13-first pressure gauge, 14-second pressure gauge and 15-flowmeter.

Detailed Description

Hereinafter, an embodiment of an apparatus for preventing a pipe from being damaged due to solidification and expansion of a medium and a construction method thereof according to the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

In the description of the present invention, it should be noted that the terms "top", "bottom", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-3:

as shown in fig. 1-3, a preferred device for preventing the pipeline from being damaged due to the solidification and expansion of the medium, which is provided between the transportation pipelines 1 between two adjacent valves 2, comprises a rubber tube 6 laid at the bottom of the inner side of the transportation pipeline 1, two ends of the rubber tube 6 extend to the outer side of the transportation pipeline 1 from the connecting flange 3 arranged at the bottom of the transportation pipeline 1, the end part of the connecting flange is integrally provided with an annular fastening sealing ring 7 and is sealed by a valve core 8, the outer side of the connecting flange 3 is provided with a flange sheet 4 by a fastening bolt 5, the fastening sealing ring 7 is pressed and sealed by the flange sheet 4 and the connecting flange 3, the rubber pipe 6 is filled with air through an air compressor, and the volume of the air in the rubber tube 6 is larger than the volume increment of the solidified medium in the transportation pipeline 1, and in order to improve the air filling efficiency, two side ends of the rubber tube 6 are respectively provided with an air compressor connected with the valve core 8 of the rubber tube;

in order to prevent the rubber tube 6 from expanding unevenly and affecting the even flow of the medium in the transport pipe 1, as shown in fig. 2A plurality of reinforcing ribs 9 are arranged in the rubber tube 6 at equal intervals along the axis direction, the reinforcing ribs 9 are made of fibers made of nonmetal materials such as nylon, terylene and the like, and the tensile strength is not less than 50N/mm²；

In order to enhance the anti-freezing effect, when the medium in the transportation pipeline 1 needs to be thawed in time, an electric tracing band 10 penetrates through the rubber pipe 6, leads at two ends of the electric tracing band 10 penetrate out of the end part of the rubber pipe 6 and are in sealing fit with the rubber pipe 6, and a protective sleeve 11 is sleeved on the outer side of the electric tracing band;

in order to ensure the timeliness and the accuracy of the operation of filling air into the rubber tube 6, a thermometer 12 and a first pressure gauge 13 for measuring the temperature and the pressure of the medium inside the conveying pipeline 1 are respectively arranged, a second pressure gauge 14 for measuring the air pressure inside the rubber tube 6 is arranged on the inner side of the valve core 8, and an air flow meter 15 is arranged between the valve core 8 and an air compressor;

in order to improve the automation degree of the anti-freezing and anti-freezing operation of the conveying pipeline 1, the device further comprises a central controller used for adjusting the medium flow inside the conveying pipeline 1 and the air filling volume inside the rubber pipe 6, the central controller is respectively electrically connected with the valve 2, the thermometer 12, the first pressure gauge 13, the second pressure gauge 14, the air compressor and the air flow meter 15, the central controller obtains the real-time medium temperature and the operating pressure inside the conveying pipeline 1 through the thermometer 12 and the first pressure gauge 13, controls the opening and closing of the air compressor and the electric tracing band 10 and the working power according to the real-time medium temperature, automatically calculates the air filling volume according to the monitoring data of each instrument and correspondingly adjusts the medium flow at the valve 2, and the air filling volume inside the rubber pipe 6 is calculated by adopting the following formula,

ΔV=[P₁V₁T₂/(P₂T₁)-V₁] *（1+X），

where Δ V represents the volume of air to be filled inside the rubber tube 6, P₁Indicating the pressure of the medium inside the rubber tube 6, P, indicated by the first pressure gauge 13 or the second pressure gauge 14 before the medium in the transport pipe 1 has solidified₂Indicating the interior of the rubber tube 6 indicated by the second pressure 14 gauge after the medium in the transport pipe 1 has solidifiedAir pressure, V₁Represents the volume of the medium in the transport pipe 1 before the medium solidifies, T₁Indicating the temperature, T, of the medium as indicated by the thermometer before the solidification of the medium in the transport pipe 1₂The freezing point of the medium in the transportation pipeline 1 is shown, the X shows the surplus coefficient, and the value range of the surplus coefficient is 2% -5%, for example, when the medium in the transportation pipeline 1 is water, the volume of the air required to be filled in the rubber tube 6 is required to be larger than 11% of the volume of the water in the transportation pipeline 1, and at the moment, the delta V can be 15% of the volume of the water in the transportation pipeline 1.

The invention relates to a construction method of a device for preventing a pipeline from being damaged due to solidification and expansion of a medium, which mainly comprises the following steps:

step one, mounting a connecting flange 3, mounting the connecting flange 3 at the bottom of a conveying pipeline 1 between two valves 2, and polishing the inside of the conveying pipeline 1 (such as the position of the connecting flange 3 and the position of a seam steel pipe or a spiral seam steel pipe) smoothly;

step two, manufacturing an electric tracing rubber pipe, selecting a rubber pipe 6 (made of natural rubber or synthetic rubber) with a proper pipe diameter and an electric tracing band 10 with a proper type according to the pipe diameter of the conveying pipeline 1 and the type of a conveying medium in the conveying pipeline, sleeving a protective sleeve 11 outside the electric tracing band 10 and penetrating the protective sleeve into the rubber pipe 6, wherein the electric tracing band 10 and the rubber pipe 6 can be manufactured in a drawing mode, the electric tracing band 10 adopts an anti-corrosion waterproof type automatic temperature control electric tracing band, the working temperature of the electric tracing band 10 is set to be not higher than 20 ℃, and adverse effects on the elastic performance of the rubber pipe 6 due to overhigh temperature are avoided;

step three, performance testing, namely, carrying out electric tracing band 10 insulation performance testing and rubber tube 6 air tightness performance testing on the manufactured electric tracing rubber tube and confirming that the detection result is qualified;

step four, installing an electric tracing rubber pipe, laying the rubber pipe 6 with the electric tracing band 10 in a through length manner at the bottom of the inner side of the transportation pipeline 1, and tightly pressing and sealing the two ends of the rubber pipe through a flange sheet 4 and a fastening bolt 5, and proposing that the electric tracing rubber pipe is installed in sections in an area between two valves 2 on the transportation pipeline 1 in order to avoid influencing the closing performance of the valves 2;

step five, the system is put into operation, after the electric heat tracing rubber pipe is installed, the transportation pipeline 1 is filled with medium and normally operated under pressure, when the temperature of the operation environment in winter reaches the freezing point of the medium, if the system needs to normally operate and continuous power supply conditions are provided on site, the medium flow in the transportation pipeline 1 is regulated by the valve 2, the air compressor is started to fill a proper amount of air into the rubber pipe 6, the electric heat tracing band 10 is electrified to supply heat, the working power of the electric heat tracing band needs to maintain the temperature of the medium in the transportation pipeline 1 to be more than 5 ℃ higher than the freezing point of the medium, a medium thermometer 12 is arranged on the pipe network of the system, the medium temperature is monitored at any time, the heat supply power of the electric heat tracing band 10 is automatically regulated by the central controller according to the temperature of the medium, if the system stops operating, but the medium in the transportation pipeline 1 cannot be discharged or is, the volume of the air in the rubber tube 6 is made to be larger than the volume increase amount when the medium in the transportation pipeline 1 is solidified, and it should be noted that the pressure of the air in the rubber tube 6 when the volume of the medium in the transportation pipeline 1 is solidified and stops increasing should not be larger than the maximum allowable pressure-bearing value of the transportation pipeline 1 and the rubber tube 6.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.