阅读说明：本技术 一种限温节能安全型伴热带 (A kind of warm energy-saving safety heating tape of limit ) 是由 余浩 边登鹏 董坤 徐钰剑 张廷锋 丁文强 于 2019-05-31 设计创作，主要内容包括：本发明涉及限温伴热技术领域,具体公开了一种限温节能安全型伴热带,包括自内而外依次设置的两根平行设置的导线、伴热层、绝缘层、屏蔽层以及护套层,伴热层填充在两根导线与绝缘层围成的空间内,伴热层由PTC材料制成。(The present invention relates to limit warm heat tracing technical field, specifically disclose a kind of warm energy-saving safety heating tape of limit, two conducting wire, heat tracing layer, insulating layer, shielded layer and the restrictive coatings disposed in parallel set gradually including from-inner-to-outer, heat tracing layer is filled in the space that two conducting wires and insulating layer surround, and heat tracing layer is made of ptc material.)

1. a kind of warm energy-saving safety heating tape of limit, it is characterised in that: be arranged in parallel including two that from-inner-to-outer is set gradually Conducting wire, heat tracing layer, insulating layer, shielded layer and restrictive coating, the space that heat tracing layer is filled in two conducting wires and insulating layer surrounds Interior, heat tracing layer is made of ptc material.

2. the warm energy-saving safety heating tape of limit according to claim 1, it is characterised in that: the restrictive coating is fluoropolymer Outside object insulating corrosion layer by layer.

3. the warm energy-saving safety heating tape of limit according to claim 2, it is characterised in that: shielded layer is worked out by tinned copper wire Net is constituted.

4. the warm energy-saving safety heating tape of limit according to claim 3, it is characterised in that: the conducting wire is tin annealed copper wire It is twisted.

5. the warm energy-saving safety heating tape of limit according to claim 4, it is characterised in that: the insulating layer is moulded by heat-resisting fluorine Expect that thermoplastic elastomer is constituted.

6. the warm energy-saving safety heating tape of limit according to any one of claims 1-5, it is characterised in that: ptc material is It is superimposed structure using carbon black as conductive materials, using polypropylene as the conductive layer of matrix by two layers of polypropylene insulation layer and three layers At.

7. the warm energy-saving safety heating tape of limit according to claim 6, it is characterised in that: carbon black is in conductive layer material Mass content is 12%.

Technical field

The present invention relates to limit warm heat tracing technical field.

Background technique

Heat tracing is exactly to convert thermal energy for the energy of other forms using electric tracing equipment, passes through direct or indirect heat Exchange, supplement is passed through the heat that thermal insulation material is lost by heat tracing equipment, and is controlled using temperature, reaches tracking and control companion The temperature of medium in hot equipment is allowed to maintain one rationally and in economic level.

The heating tape of our factory is traditional heating tape of low form, and principle controls heating tape by temperature controller, with Achieve the purpose that heated object heats, and temperature controller realizes heating by control environment temperature, it can not volitional check temperature.

My power plant uses natural gas unit, opens late stop mode using white, unit need not put into companion when stopping standby completely The torrid zone, and obtain temperature controller in the prior art and still heat up to control environment temperature, this has resulted in energy waste, improves life Produce cost.

Summary of the invention

The purpose of the present invention is to provide a kind of warm energy-saving safety heating tapes of limit, to solve bearing inspection below steam guiding tube It repairs lifting and needs the problem of removing steam guiding tube.

In order to achieve the above object, base case of the invention provides a kind of warm energy-saving safety heating tape of limit, including certainly Interior and two conducting wire, heat tracing layer, insulating layer, shielded layer and restrictive coatings disposed in parallel setting gradually outside, the filling of heat tracing layer In the space that two conducting wires and insulating layer surround, heat tracing layer is made of ptc material.

Compared with the prior art, the advantages of the present invention are as follows:

The technical problem to be solved by the present invention is to propose a kind of temperature selflimiting electric tracing band, pass through the spy using ptc material Temp auto-controlled heating tape is made in property, and the heating element of self limiting temperature heating tape is equably extruded between two parallel metal wires One layer has core ribbon made of positive temperature coefficient semiconductor ptc material.When two conducting wires and power supply of heating tape one end are connected, electricity Stream flows transversely through ptc layer from a conducting wire and reaches another conducting wire, and PTC layers are exactly continuous electricity between the conductors in parallel Heater is hindered, thermal energy is converted electrical energy into, tracing thermal-insulating is carried out to operating system.Core ribbon resistance is increased with temperature to be increased, and is arrived High resistance area, resistance, which arrives greatly, almost blocks electric current, and core ribbon temperature just reaches high limit and no longer increases but automatic temp limit.The output of cable Power is controlled primarily by diabatic process to be heated the temperature of system.Self temperature control heating tape is accordingly had by heat tracing system automatic Output power is adjusted, therefore will not be burnt because of self-heating, but because actual needs heat compensates, therefore is a new generation's section It can type.

It is enclosed with insulating layer outside ptc layer, shielded layer is enclosed with outside insulating layer, shield is enclosed with outside shielded layer Jacket layer；Ptc layer plays self limiting temperature；Metal wire shielding layer is used to absorb and the electromagnetic wave that rebounds, thus the electromagnetic wave generated Shielding action.

Further, the restrictive coating be fluoropolymer insulating corrosion outside layer by layer.This makes of the invention that heating tape has Excellent security performance and service life.

Further, shielded layer is made of tinned copper wire establishment net.

Further, the conducting wire is twisted for tin annealed copper wire.

Further, the insulating layer is made of heat-resisting fluoroplastics thermoplastic elastomer.Insulating materials has good mechanical physics special Property.

Further, ptc material is by two layers of polypropylene insulation layer and three layers using carbon black as conductive materials, with polypropylene It is superimposed to form for the conductive layer of matrix.

Conductive layer and insulating layer is alternately distributed the lamellar composite ptc material of overlapping, and conductive layer and insulating layer is squeezing out direction On be continuous phase, conductive layer is the common filling system of polymer and carbon black, and insulating layer is pure polymer, conductive layer and The polymer of insulating layer can be same polymer, it is thereby achieved that double in single polymer matrix exceed infiltration, In Lower room temperature resistivity is obtained in the case where low content of carbon black, help to obtain higher PTC intensity.Moreover, conductive layer exists When flowing through point folded unit, cohesive size becomes smaller, disperses more evenly, to be conducive to PTC intensity carbon black particle under the action of shear force Raising；The number of plies of layered polymer matrix PTC material is higher, and PTC intensity is bigger.

The experimental results showed that be prepared using layered polymer matrix PTC material prepared by the present invention and conventional method Polymer matrix PTC material is compared, carbon black polymeric matrix dispersion size more it is small more evenly, percolation threshold reduces, and PTC is strong Degree improves.In addition unique layer structure, so that elongation at break increases substantially.The stratiform polymerization prepared through the invention Object matrix PTC material has layer structure, and conductive layer and insulating layer is alternately arranged, and conductivity has the characteristics that anisotropy.

Further, mass content of the carbon black in conductive layer material is 12%.In the electric conductivity that ensure that ptc layer While energy, and heating tape fever is sufficiently adapted to and has required.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram for limiting warm energy-saving safety heating tape embodiment of the present invention；

Fig. 2 is a kind of cross-sectional view for limiting warm energy-saving safety heating tape embodiment re-detection set of the present invention.

Specific embodiment

Below by the further details of explanation of specific embodiment:

Appended drawing reference in Figure of description includes: conducting wire 1, heat tracing layer 2, insulating layer 3, shielded layer 4, restrictive coating 5, A chamber 6, B chamber 7, tear line 8.

As shown in Figure 1, a kind of warm energy-saving safety heating tape of limit, sets in parallel including two that from-inner-to-outer is set gradually Conducting wire 1, heat tracing layer 2, insulating layer 3, shielded layer 4 and the restrictive coating 5 set, heat tracing layer 2 are filled in two conducting wires 1 and insulating layer 3 In the space surrounded, heat tracing layer 2 is made of ptc material.

It is enclosed with insulating layer 3 outside ptc layer, shielded layer 4 is enclosed with outside insulating layer 3, is wrapped up outside shielded layer 4 There is restrictive coating 5；Ptc layer plays self limiting temperature；Metal wire shielding layer 4 is used to absorb and the electromagnetic wave that rebounds, thus generate Electromagnetic wave shielding effect.Restrictive coating 5 be fluoropolymer insulating corrosion outside layer by layer.This makes the heating tape of the invention that obtains with excellent Good security performance and service life.Further, shielded layer 4 is made of tinned copper wire establishment net.Conducting wire 1 is tin annealed copper wire It is twisted.Insulating layer 3 is made of heat-resisting fluoroplastics thermoplastic elastomer.Insulating materials has good mechanical physical characteristic.

Ptc material is by two layers of polypropylene insulation layer 3 and three layers using carbon black as conductive materials, using polypropylene as matrix Conductive layer be superimposed to form.Mass content of the carbon black in conductive layer material is 12%.It ensure that ptc layer While electric conductivity, and heating tape fever is sufficiently adapted to and has required.

Conductive layer and insulating layer 3 is alternately distributed the lamellar composite ptc material of overlapping, and conductive layer and insulating layer 3 is in extrusion side It is upwards continuous phase, conductive layer is the common filling system of polymer and carbon black, and insulating layer 3 is pure polymer, conductive layer It can be same polymer with the polymer of insulating layer 3, it is thereby achieved that double in single polymer matrix exceed infiltration, Lower room temperature resistivity is obtained in the case where low content of carbon black, help to obtain higher PTC intensity.Moreover, conductive layer When flowing through point folded unit, cohesive size becomes smaller, disperses more evenly, it is strong to be conducive to PTC carbon black particle under the action of shear force The raising of degree；The number of plies of layered polymer matrix PTC material is higher, and PTC intensity is bigger.

The experimental results showed that be prepared using layered polymer matrix PTC material prepared by the present invention and conventional method Polymer matrix PTC material is compared, carbon black polymeric matrix dispersion size more it is small more evenly, percolation threshold reduces, and PTC is strong Degree improves.In addition unique layer structure, so that elongation at break increases substantially.The stratiform polymerization prepared through the invention Object matrix PTC material has layer structure, and conductive layer and insulating layer 3 is alternately arranged, and conductivity has the characteristics that anisotropy.

Temp auto-controlled heating tape is made by the characteristic using ptc material in the present invention, the heating element of self limiting temperature heating tape, It is equably to extrude one layer between two parallel metal wires 1 there is core ribbon made of positive temperature coefficient semiconductor ptc material. When two conducting wires 1 and power supply of heating tape one end are connected, electric current flows transversely through ptc layer from a conducting wire 1 and reaches another Conducting wire 1, PTC layers are exactly the resistance heater being continuously connected in parallel between conducting wire 1, convert electrical energy into thermal energy, to operating system into Row tracing thermal-insulating.Core ribbon resistance is increased with temperature to be increased, and has arrived high resistance area, resistance, which arrives greatly, almost blocks electric current, and core ribbon temperature is just Reach high limit and no longer increases but automatic temp limit.The output power of cable is controlled primarily by diabatic process to be heated the temperature of system Degree.Self temperature control heating tape accordingly has automatic adjustment output power by heat tracing system, therefore will not burn because of self-heating, But because actual needs heat compensates, thus it is energy-saving for a new generation.

In actual use, heating tape is easy to fracture.The broken positions of heating tape are more important, testing staff The stress of heating tape can be judged according to broken positions, and then adjusts the construction of restrictive coating 5 in heating tape, therefore spy is in companion 5 outer layer of restrictive coating in the torrid zone sets detection set, and the both ends for detecting set are fixed in the common broken positions of heating tape by viscose glue, The detection set is made of soft plastic, as shown in Fig. 2, detection set is made of internal layer and outer layer, internal layer and restrictive coating 5 are close Fitting is divided into several separate spaces by parting bead between internal layer and outer layer, and internal layer, outer layer and parting bead are using flexiplast one Injection molding.It is provided with the tear line 8 of annular on the outer layer of each separate space, sets independent A chamber 6, B chamber 7 in separate space, is filled in A chamber There is the mixed solution of fluorescent liquid and aluminum sulfate, the mixed solution of built-in sodium bicarbonate and hair foam agent, heating tape difference are long in B chamber The fluorescent liquid color spent in corresponding separate space is not identical (as selected red, orange, pink, green, blue, purple, yellow Deng).When some position of restrictive coating 5 fractures, the separate space of corresponding position is fractureed the extruding at place by heating tape, the tearing of separate space Line 8 is its weakness, and extruding force is transferred to tear place and separate space is ruptured, and the fluorescent liquid inside separate space point, which splashes out, to be come, due to companion Fluorescent liquid color in the corresponding separate space of tropical different length is not identical, and testing staff can be according to point fluorescent liquid color splashed out To judge the broken positions of heating tape.Tear line 8 by several equidistant arrays of openings at annular linear structure, at the same time, carbon Sour hydrogen sodium is contacted with aluminum sulfate solution with hair foam agent and is reacted, and generates carbon dioxide gas foam, and volume expansion will simultaneously fracture Place's package not only makes fluorescent liquid fracture in other words and locates more obvious, plays a warning role to people, additionally it is possible to prevent work People, which accidentally contacts to fracture, locates exposed electric conductor.

What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification The records such as specific embodiment can be used for explaining the content of claim.