阅读说明：本技术 碳纤维电热系统与器件 (Carbon fiber electric heating system and device ) 是由 李雪真 张爱民 韩涛 于 2021-07-15 设计创作，主要内容包括：本发明公开提供了一种碳纤维电热器件与系统,应用于碳纤维技术领域,具体地,碳纤维电热器件采用抗拉伸结构,碳纤维电热器件增大了抗拉能力,以提高安全性能；进一步碳纤维电热系统,增加电路异常检测模块,对碳纤维电热器件所在线路进行检测,对于异常情况,微控制器通过双向可控硅控制对应碳纤维电热器件关断,从物理能力上改变碳纤维电热器件的抗拉能力,减少拉拽造成的断裂,从自动控制角度,当电路发生异常,能够自动关断碳纤维电热器件,故从很大程度上提高了安全性能。(The invention discloses a carbon fiber electric heating device and a system, which are applied to the technical field of carbon fibers, and particularly, the carbon fiber electric heating device adopts an anti-tensile structure, so that the anti-tensile capability of the carbon fiber electric heating device is improved, and the safety performance is improved; further carbon fiber electric heating system increases the unusual detection module of circuit, detects carbon fiber electric heating device place circuit, and to the abnormal conditions, microcontroller corresponds carbon fiber electric heating device through bidirectional thyristor control and cuts off, changes carbon fiber electric heating device's tensile ability from the physical ability, reduces to draw and draws the fracture that causes, from the automatic control angle, takes place unusually as the circuit, can turn off carbon fiber electric heating device automatically, so from to a great extent improved the security performance.)

1. A carbon fiber electrothermal device, comprising: an inner core and an outer protective sheath; the inner core is formed by twisting a plurality of groups of carbon fiber cable groups; a heat-conducting filler is filled between the inner core and the outer protective sleeve; the outer protective sleeve is sequentially provided with a rubber layer and a tensile layer from outside to inside; the carbon fiber cable group at least comprises two heating cables.

2. A carbon fiber electrothermal device, comprising: carbon fiber filaments and stainless steel fiber filaments; the density ratio of the carbon fiber filaments to the stainless steel fiber filaments is 2: 1; each cross node comprises three fiber filaments; wherein the included angle of the three carbon fiber yarns is 60 degrees; the stainless steel fiber wire is arranged between the two carbon fiber wires.

3. A carbon fiber electrothermal system, comprising the carbon fiber electrothermal device of claim 1 or 2, and further comprising: the device comprises a microcontroller, a control circuit, an output circuit and a detection circuit; the microcontroller is electrically connected with the control circuit, the output circuit and the detection circuit respectively; the output circuit receives a starting instruction of the microcontroller; the carbon fiber electric heating device is controlled to be switched on through the control circuit; the detection circuit detects the current in the circuit and feeds back the detection result to the microcontroller; and the microcontroller controls the carbon fiber electric heating device to be switched on or switched off according to the detection result.

4. A carbon fibre electrothermal system according to claim 3, further comprising an alarm device; the alarm device is connected with a first output port of the microcontroller.

5. A carbon fiber electrothermal system according to claim 3, wherein the output circuit comprises a first relay; the normally open contact of the first relay is connected between the zero line and the live line; one end of the coil of the first relay is connected with the power supply end of the microcontroller, and the other end of the coil of the first relay is grounded.

6. A carbon fiber electrothermal system according to claim 3, wherein the control circuit comprises: a bidirectional thyristor and a second relay; the bidirectional controllable silicon is arranged on a zero line; the control end of the bidirectional controllable silicon is connected with a second output port of the microcontroller; a coil of the second relay is connected in series between the bidirectional controllable silicon and the carbon fiber electric heater; and one end of a normally closed contact of the second relay is connected with the detection circuit, and the other end of the normally closed contact of the second relay is grounded.

7. The carbon fiber electrothermal system of claim 6, wherein the detection circuit comprises: a sampling line, a sub-microcontroller and a temperature sensor; one end of the sampling line is connected with the normally closed contact of the second relay, and the other end of the sampling line is connected with a first input port of the microcontroller through the sub-microcontroller; one end of the temperature sensor is grounded, and the other end of the temperature sensor is connected with a second input port of the microcontroller.

8. A carbon fibre electrothermal system according to claim 4, wherein the alarm means comprises: one or more of a visual alarm, an audible alarm, a tactile alarm and a gustation alarm.

Technical Field

The invention relates to the technical field of carbon fibers, in particular to a carbon fiber electric heating system and a carbon fiber electric heating device.

Background

The carbon fiber is inorganic polymer fiber with carbon content higher than 90%. The carbon fiber has high axial strength and modulus, no creep, good fatigue resistance, specific heat and conductivity between nonmetal and metal, small thermal expansion coefficient, good corrosion resistance, low fiber density, good X-ray permeability and high thermal conversion efficiency. Thus, carbon fiber heating is gradually applied to the heating field.

However, it is crucial to heating with carbon fiber heating equipment, for example, a carbon fiber cable is composed of a carbon fiber bundle and a high temperature resistant teflon plastic coating sleeved outside the bundle, and when the temperature rises to above 360 ℃, the teflon coating is damaged and cracked, so that the carbon fiber is short-circuited; the occurrence of a short circuit may cause property loss or life danger to the user. Especially, the carbon fiber cable is heated for a long time or the tensile strength of the carbon fiber cable is not enough, so that the carbon fiber cable is broken, no abnormity is found, and accidents are easily caused due to the lack of safety protection.

Therefore, how to provide a carbon fiber electrothermal system and a device with a protection function is a problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of this, the invention provides a carbon fiber electric heating system and a device, which can ensure the strength of the carbon fiber electric heating device and add a protection function to an application system of the carbon fiber electric heating device.

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

a carbon fiber electrothermal device comprising: an inner core and an outer protective sheath; the inner core is formed by twisting a plurality of groups of carbon fiber cable groups; a heat-conducting filler is filled between the inner core and the outer protective sleeve; the outer protective sleeve is sequentially provided with a rubber layer and a tensile layer from outside to inside; the carbon fiber cable group at least comprises two heating cables.

Through the technical scheme, the heat conduction efficiency is ensured by filling the heat conduction filler, and meanwhile, the tensile layer can resist pulling with certain strength; a stainless steel mesh may be used.

A carbon fiber electrothermal device comprising: carbon fiber filaments and stainless steel fiber filaments; the density ratio of the carbon fiber filaments to the stainless steel fiber filaments is 2: 1; each cross node comprises three fiber filaments; wherein the included angle of the three carbon fiber yarns is 60 degrees; the stainless steel fiber wire is arranged between the two carbon fiber wires.

Through the technical scheme, the strength of the stainless steel fiber wires is greater than that of the carbon fiber wires, so that the two crossed carbon fiber wires on each node can be balanced through the stainless steel fiber wires.

A carbon fiber electric heating system comprises a carbon fiber electric heating device and further comprises: the device comprises a microcontroller, a control circuit, an output circuit and a detection circuit; the microcontroller is electrically connected with the control circuit, the output circuit and the detection circuit respectively; the output circuit receives a starting instruction of the microcontroller; the carbon fiber electric heating device is controlled to be switched on through the control circuit; the detection circuit detects the current in the circuit and feeds back the detection result to the microcontroller; and the microcontroller controls the carbon fiber electric heating device to be switched on or switched off according to the detection result.

According to the technical scheme, the conduction of the bidirectional thyristor is controlled through the conduction current of the output circuit and the microcontroller, and the carbon fiber electric heating device is started; and whether a voltage or current signal exists or not is detected by the detection circuit, whether the normally closed contact of the second relay is abnormal or not is judged, the abnormal signal is fed back to the microcontroller, and whether the carbon fiber electric heating device is turned off or not is judged through the bidirectional thyristor.

Preferably, in the above carbon fiber electrothermal system, an alarm device is further included; the alarm device is connected with a first output port of the microcontroller.

Through the technical scheme, the alarm device determines whether to trigger alarm according to the judgment of the microcontroller.

Preferably, in the above-mentioned carbon fiber electrothermal system, the output circuit includes a first relay; the normally open contact of the first relay is connected between the zero line and the live line; one end of the coil of the first relay is connected with the power supply end of the microcontroller, and the other end of the coil of the first relay is grounded.

Through above-mentioned technical scheme, coil through first relay is electrified, and normally open contact is closed.

Preferably, in the above carbon fiber electrothermal system, the bidirectional thyristor and the second relay; the bidirectional controllable silicon is arranged on a zero line; the control end of the bidirectional controllable silicon is connected with a second output port of the microcontroller; a coil of the second relay is connected in series between the bidirectional controllable silicon and the carbon fiber electric heater; and one end of a normally closed contact of the second relay is connected with the detection circuit, and the other end of the normally closed contact of the second relay is grounded.

Preferably, in the above carbon fiber electrothermal system, the detection circuit includes: a sampling line, a sub-microcontroller and a temperature sensor; one end of the sampling line is connected with the normally closed contact of the second relay, and the other end of the sampling line is connected with a first input port of the microcontroller through the sub-microcontroller; one end of the temperature sensor is grounded, and the other end of the temperature sensor is connected with a second input port of the microcontroller.

Through the technical scheme, the sub-microcontroller is convenient for processing a system with multiple paths of carbon fiber electric heating devices working simultaneously, and judges whether abnormality occurs or not for multiple current or voltage parameters acquired simultaneously so as to ensure the safety of each path of carbon fiber electric heating device.

Preferably, in the above carbon fiber electrothermal system, the alarm device includes: one or more of a visual alarm, an audible alarm, a tactile alarm and a gustation alarm.

According to the technical scheme, compared with the prior art, the carbon fiber electric heating device and the system are provided, and the tensile capacity of the carbon fiber electric heating device is increased so as to improve the safety performance; and carbon fiber electric heating system increases the unusual detection module of circuit, detects carbon fiber electric heating device place circuit, and to unusual condition, microcontroller passes through the shutoff of bidirectional thyristor control corresponding carbon fiber electric heating device, changes carbon fiber electric heating device's tensile ability from the physical ability, reduces to draw and draws the fracture that causes, from the automatic control angle, takes place unusually as the circuit, can turn off carbon fiber electric heating device automatically, so from to a great extent improved the security performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a block diagram illustrating the structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a schematic diagram of a carbon fiber electric heating device according to the present invention;

fig. 4 is a structural diagram of another carbon fiber electric heating device of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention discloses a carbon fiber electric heating device, as shown in fig. 3, comprising: an inner core and an outer protective sheath; the inner core is formed by twisting a plurality of groups of carbon fiber cable groups; a heat-conducting filler 7 is filled between the inner core and the outer protective sleeve; the outer protective sleeve comprises a rubber layer 8 and a tensile layer 9 from outside to inside in sequence; the carbon fiber cable set includes at least two heat-generating cables 10.

Specifically, the carbon fiber cable set further includes a tensile net 11; wherein, the heat-conducting filler 7 is also filled between the tensile net sleeve 11 and the heating cable 10, and the heat-conducting fillers inside and outside the carbon fiber cable group are contacted or integrally formed; guarantee heat-conduction, tensile net cover improves the intensity of carbon fiber cable group simultaneously.

Further, the carbon fiber electric heating device 2 further comprises a central line 14; the central line 14 is made of stainless steel or other metal materials, so that the strength of the whole carbon fiber electric heating device 2 is ensured.

The carbon fiber electric heating device 2 can be wound on a water pipe needing heating or heat preservation, for example, a solar cold water pipe in the outside in winter, and can be used as a heating cable.

Another embodiment of the present invention discloses a carbon fiber electric heating device, as shown in fig. 4, including: carbon fiber filaments 12 and stainless steel fiber filaments 13; the density ratio of the carbon fiber wires 12 to the stainless steel fiber wires 13 is 2: 1; each cross node comprises three fiber filaments; wherein the included angle of the three carbon fiber yarns is 60 degrees; the stainless steel filaments 13 are arranged between two carbon fibre filaments 12.

Specifically, each cross node is composed of two carbon fiber wires 12 and one stainless steel fiber wire 13, and the carbon fiber wires 12 are subjected to force leakage through the stainless steel fiber wires 13, so that breakage is avoided in the pulling or moving process.

The carbon fiber electric heating device 2 can be wound on a water pipe needing heating or heat preservation, for example, a solar cold water pipe in the outside in winter, and can be used as a heating cable.

In another embodiment of the present invention, a carbon fiber electric heating system is disclosed, as shown in fig. 1 and 2, including a carbon fiber electric heating device 2, further including: the microcontroller 6, the control circuit, the output circuit and the detection circuit 4; the microcontroller 6 is respectively electrically connected with the control circuit, the output circuit and the detection circuit 4; the output circuit receives a starting instruction of the microcontroller 6; the carbon fiber electric heating device 2 is controlled to be switched on through a control circuit; the detection circuit 4 detects the current in the circuit 4 and feeds back the detection result to the microcontroller 6; and the microcontroller 6 controls the carbon fiber electric heating device 2 to be switched on or switched off according to the detection result.

Further, the carbon fiber electric heating device 2 is not limited thereto, and includes a carbon fiber plate, a carbon fiber tube, a carbon fiber blanket, and the like.

In the above carbon fiber electric heating system, an alarm device 5 is also included; the alarm device 5 is connected with a first output port of the microcontroller 6, and the alarm device 5 receives the feedback information through the microcontroller 6 and sends out an instruction whether to trigger alarm or not to remind a user of paying attention.

In order to further optimize the technical scheme, the output circuit comprises a first relay KM 1; the normally open contact of the first relay KM1 is connected between the zero line and the live line; one end of the coil of the first relay KM1 is connected to the power supply terminal of the microcontroller 6, and the other end is grounded.

Specifically, the coil of the first relay KM1 was energized by the microcontroller 6, and was closed along with the normally open contact of the first relay KM 1; the carbon fiber electric heating device 2 is connected into an alternating current circuit, but the carbon fiber electric heating device 2 is not electrified because the bidirectional controllable silicon 1 is in an off state at present.

Only the microcontroller 6 inputs conduction current to the control end of the bidirectional controllable silicon 1, and the carbon fiber electric heating device 2 starts to work.

In order to further optimize the above technical solution, the control circuit includes: a triac 1 and a second relay KM 2; the bidirectional controllable silicon 1 is arranged on a zero line; the control end of the bidirectional controllable silicon 1 is connected with a second output port of the microcontroller 6; a coil of the second relay KM2 is connected in series between the bidirectional thyristor 1 and the carbon fiber electric heater; one end of a normally closed contact of the second relay KM2 is connected with the detection circuit 4, and the other end is grounded.

In order to further optimize the above technical solution, the detection circuit 4 includes: a sampling line, a sub-microcontroller and a temperature sensor 3; one end of the sampling line is connected with a normally closed contact of the second relay KM2, and the other end of the sampling line is connected with a first input port of the microcontroller 6 through the sub-microcontroller; one end of the temperature sensor 3 is grounded, and the other end is connected with a second input port of the microcontroller 6.

The sub-microcontroller can simultaneously acquire voltage signals of the multi-path carbon fiber electric heating devices, and the data are orderly processed.

Specifically, the microcontroller 6 controls the conduction of the triac 1, the coil of the second relay KM2 is electrified, and meanwhile, the normally closed contact of the second relay KM2 is opened; the voltage parameters cannot be acquired on the sampling line in the detection circuit 4, and the microcontroller 6 feeds back an electric signal representing the disconnection of the normally closed contact of the second relay KM2 to the microcontroller according to the voltage parameters in the current detection circuit 4;

when the microcontroller has no control signal to control the conduction of the bidirectional thyristor 1, the carbon fiber electric heating device 2 loses power supply and does not work, at the moment, the coil of the second relay KM2 is not electrified, the normally closed contact of the second relay KM2 is closed, and the detection circuit 4 obtains voltage or current and feeds back an electric signal representing the closing of the normally closed contact of the second relay KM2 to the microcontroller.

Therefore, if the microcontroller does not receive the electric signal which is fed back by the detection circuit 4 and indicates that the normally closed contact of the second relay KM2 is opened within a preset time period (for example, 5s), a carbon fiber electric heating device 2 closing signal is output to the control end of the triac 1 to close the carbon fiber electric heating device 2. The fault cannot be automatically recovered, and the fault can be recovered after being overhauled.

Further, when the temperature signal acquired by the temperature sensor 3 reaches a threshold value, the microcontroller 6 sends a signal for turning off the carbon fiber electric heating device 2 to the control end of the bidirectional controllable silicon 1.

Furthermore, a plurality of carbon fiber electric heating devices 2 can be arranged in parallel, a coil of a relay and a bidirectional thyristor 1 are arranged on a branch circuit of each carbon fiber electric heating device 2, a normally closed contact of the relay is connected to a detection circuit 4, the detection circuit 4 determines that the branch circuit is abnormal, and the microcontroller 6 controls the bidirectional thyristor 1 on the corresponding branch circuit to be switched off.

In order to further optimize the above technical solution, the alarm device 5 includes: one or more of a visual alarm, an audible alarm, a tactile alarm and a gustation alarm.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.