CN211375742U - Tunnel cable fire monitoring device - Google Patents
Tunnel cable fire monitoring device Download PDFInfo
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- CN211375742U CN211375742U CN201921940212.2U CN201921940212U CN211375742U CN 211375742 U CN211375742 U CN 211375742U CN 201921940212 U CN201921940212 U CN 201921940212U CN 211375742 U CN211375742 U CN 211375742U
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Abstract
The utility model discloses a tunnel cable fire monitoring device, the utility model discloses a signal acquisition unit for acquireing cable and conflagration-related data parameter, the central processing unit that is used for receiving signal acquisition unit's data parameter and handles and the output unit that receives central processing unit's command signal and output, the utility model discloses can carry out real-time monitoring to the tunnel cable, acquire the data parameter associated with the conflagration that takes place, judge the possibility that the conflagration takes place and the conflagration takes place according to the scope of parameter, early warning in advance to avoid the conflagration and reduce the loss that leads to because the cable conflagration; the utility model discloses whether the detection conflagration takes place and the possibility of emergence from the root, can follow the emergence of stopping tunnel cable conflagration from the root.
Description
Technical Field
The utility model belongs to the fire control safety field, in particular to tunnel cable conflagration monitoring device.
Background
Electric energy belongs to one of energy sources essential for industrial production and daily life, city infrastructures and buildings are continuously increased along with the rapid development of economy in China, after the infrastructures and the buildings occupy the ground and space, some power cables are forced to be changed into underground tunnels or channels, so that the power transmission cables are stacked on a metal bridge, metal protective layers of the cables stacked on the bridge generate an alternating magnetic field when alternating current passes through the metal protective layers, the metal protective layers of the cables in the alternating magnetic field generate induced electromotive force and form circulation currents, the circulation currents cause heating and insulation reduction of the cables, breakdown short circuit can be caused to cause fire when the circulation currents are serious, meanwhile, the metal bridge generates static electricity due to strong current transmission, and the risk of fire of discharge and penetration short circuit exists.
Therefore, the potential fire hazard of the tunnel cable is very prominent, so that how to effectively prevent the cable fire is a very concerned problem for the electric power operation and inspection department.
Therefore, how to realize real-time monitoring on the occurrence and development of the fire of the tunnel cable and the serious consequences, and avoid causing further loss is a problem to be urgently solved in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a fire monitoring device for tunnel cable, which can determine the probability and possibility of fire according to the detected data after being used in the tunnel cable, and the detection department can make processing according to the above determination, so as to avoid the occurrence of fire and further loss.
The utility model discloses a tunnel cable conflagration monitoring device, include:
the signal acquisition unit is used for acquiring data parameters related to the fire disaster of the cable;
the central processing unit is used for receiving and processing the data parameters of the signal acquisition unit;
and the output unit receives and outputs the command signal of the central processing unit.
The tunnel cable fixing device further comprises a base body, wherein the base body is fixedly arranged at a set position of the tunnel cable;
the signal acquisition unit, the central processing unit and the output unit are arranged on the base body.
Further, the signal acquisition unit includes:
the circulating current transformer is used for detecting circulating current data of the tunnel cable;
the cable temperature sensor is used for acquiring temperature data of the tunnel cable;
and the gas detection sensor is used for acquiring the change data of the gas content of the environment around the tunnel cable.
Further, the signal acquisition unit further includes:
an ambient temperature sensor for detecting ambient temperature data near the cable;
the smoke detector is used for detecting smoke concentration data near the detection cable;
and the open fire detector is used for detecting open fire generated by the tunnel cable and nearby.
Further, the base member includes the area body and the belt buckle device, the belt buckle device includes the base and sets up the hasp on the base, be equipped with the slide that is used for the area body to pass on the base, the slide is fixed in to area body one end, and the other end passes the slide and makes the area body and base form jointly to tie up the structure through hasp locking.
Further, the cable temperature sensor is a temperature sensing optical fiber, the temperature sensing optical fiber is distributed on the surface of the band body contacting the cable along the length direction, and the temperature sensing optical fiber contacts the surface of the cable after the band body is bound on the surface of the cable.
Further, the circulating current transformer is fixed on the base, and the fixed position facilitates the passing of a cable grounding wire;
the signal acquisition unit further comprises a thermal imager, the thermal imager is fixed on the base, and the fixed direction enables the thermal imager probe to be aligned to a position to be detected after the belt body is bound on the cable;
the gas detection sensor, the environment temperature sensor and the smoke detector are respectively fixed on the outer side surface of the base or the outer side surface of the belt body, and the base is provided with a ventilating mounting position for placing the gas detection sensor, the environment temperature sensor and the smoke detector;
the ribbon body is transversely provided with a plurality of longitudinal strip-shaped openings in parallel, and the temperature sensing optical fibers are correspondingly arranged on the two transverse sides of the strip-shaped openings.
Furthermore, the central processing unit and the output unit are fixedly arranged on the base in a waterproof, dustproof and heat-dissipation manner;
the binding belt buckle is of a self-locking structure, the lock catch is a pawl, the binding belt body is provided with a ratchet matched with the pawl, the pawl is arranged on the base in a lever mode and can swing in a return elastic force mode, and the resistance end of the pawl can be operated and swing to be exposed out of the base.
The utility model has the advantages that: the utility model discloses a tunnel cable conflagration monitoring devices can carry out real-time monitoring to the tunnel cable, acquires the data parameter that is correlated with the conflagration that takes place, judges the possibility that the conflagration takes place and conflagration is taking place according to the scope of parameter to take place the early warning, thereby avoid the conflagration and reduce the loss that leads to because of the cable conflagration; the utility model discloses whether the detection conflagration takes place and the possibility of emergence from the root, can follow the emergence of stopping tunnel cable conflagration from the root.
Drawings
The invention is further described with reference to the following figures and examples.
FIG. 1 is a schematic structural view (outer surface) of the present invention;
FIG. 2 is a schematic structural view (inner surface) of the present invention;
FIG. 3 is a schematic view of the self-locking structure of the present invention;
fig. 4 is a schematic block diagram of the present invention.
Detailed Description
FIG. 1 is a schematic structural view (outer surface) of the present invention, FIG. 2 is a schematic structural view (inner surface) of the present invention, FIG. 3 is a schematic structural view of the present invention using a self-locking structure, as shown in the drawings, the tunnel cable fire monitoring device of the present embodiment,
the method comprises the following steps:
the signal acquisition unit is used for acquiring data parameters related to the fire disaster of the cable; the data relating to a fire generally include temperature (itself and ambient), gas content, humidity, smoke, open fire, etc., and the cause of the change in these data signals, individually or in combination, may be due to a fire; for tunnel cables, the circulating current parameters (earth fault, heat build-up) are also one of the factors that contribute to a fire; collecting the parameters and selecting corresponding sensors (such as current transformers, temperature sensors, etc.), which are not described herein again;
the central processing unit 3 (monitoring host) is used for receiving and processing the data parameters of the signal acquisition unit; the data signal processing unit is used for receiving and processing the data signal transmitted by the signal acquisition unit; the central processing unit at least comprises a Central Processing Unit (CPU), a memory, a power supply (charging or power plugging, which is not described herein) and necessary peripheral circuits, so as to form a monitoring host, implement signal reception and processing (comparing with a set standard, or a stable value has a sudden change), and output a command signal to the output unit, and when a data signal of the signal acquisition unit exceeds a set value (for example, a temperature signal value range can be set according to an environmental temperature, or a sudden change degree can be set, i.e., a fire hazard is present, which is not described herein), send an alarm signal, for example, an audible and visual alarm device (lamp and voice) is set, or wireless remote transmission is performed, and the alarm signal is transmitted to a remote monitoring center, which facilitates remote monitoring, and is not described herein;
the output unit 4 is used for receiving and outputting the command signal of the central processing unit 3, generally comprises a field sound-light alarm device, a remote transmission device or a field display screen, and generally adopts a wireless transmission or wired transmission mode to perform remote data transmission, for example, the wireless transmission device is used for sending the data signal of the central processing unit (monitoring host) to a remote monitoring center (a power management center, which needs to be provided with a wireless receiving device) and storing the data signal for future reference, which is not described herein again; the operation principle of the wireless signal output device is not described in detail herein.
The cable is typically a tunnel cable, which carries high voltage electricity, and typically has a shielding layer (the mechanism of generation is known in the art and will not be described further herein) that generates a circulating current, which is normally grounded and does not present a fire hazard.
In this embodiment, the tunnel cable further includes a base body, the base body is used for being fixedly installed at a set position of the tunnel cable, the base body is fixed to the tunnel cable, and the fixing manner can adopt all mechanical fixing manners in the prior art, and of course, the base body can also be integrated at the set position of the cable, which is not described herein again;
the signal acquisition unit, the central processing unit 3 and the output unit 4 are arranged on the base body, when the device is used, the signal acquisition unit can be installed by arranging the base body on a cable (a set position), sensors do not need to be installed according to different data properties, and complicated installation work is reduced; the collective structure and properties can be selected as desired, such as collar shape, strip-like structure (conforming to the cable in the longitudinal direction of the cable), and the like.
In this embodiment, the signal acquisition unit includes:
the circulating current transformer 6 is used for detecting circulating current data of the tunnel cable and circulating current, the detection modes are various, and a mode of detecting the current of a grounding wire is generally adopted, if the fault of the grounding wire has no current, the circulating current is not grounded, heat is generated, and fire hazard is caused;
the cable temperature sensor is used for acquiring temperature data of the tunnel cable, is generally arranged close to the cable, can adopt a common temperature sensor, such as a temperature difference sheet, can also adopt a temperature sensing optical fiber and the like, and is not described herein again;
In this embodiment, the signal acquisition unit further includes:
an ambient temperature sensor 11 for detecting ambient temperature data in the vicinity of the cable; when a fire (including smoldering) occurs, the temperature of the environment (near a cable) rises, and the central processing unit obtains the change degree of the environment temperature according to the change rate of the rising temperature so as to judge the possibility of the fire; of course, an environment humidity sensor can be additionally arranged to collect the change condition (change rate) of the environment humidity and judge the possibility of fire together with the temperature change parameters collected by the temperature sensor;
a smoke detector 12 for detecting smoke concentration data near the detection cable; detecting the smoke concentration near the cable so as to judge the occurrence and degree of fire;
and the open fire detector 15 is used for detecting open fire generated by the tunnel cable and nearby, acquiring open fire data by adopting an open fire detector (ultraviolet ray) in the prior art, and judging the fire occurrence degree.
In this embodiment, the base includes a belt body 2 and a belt buckle device, the belt buckle device includes a base 1 and a lock catch disposed on the base, a slide for the belt body 2 to pass through is disposed on the base 1, the slide and a channel disposed along a direction in which the belt body 2 passes through are disposed, and a width and a height of the slide are in accordance with a size of the belt body 2, which is similar to a structure of a belt buckle of a human body and is not described herein again; one end of the strap body 2 is fixed on the base 1, and can be integrally formed, and can also be fixed by using a mechanical mode (such as screw fixation), and the other end of the strap body passes through the slideway and is locked by the lock catch to enable the strap body and the base to jointly form a binding structure, and a buckling mode similar to a waistband can be adopted, so that the detailed description is omitted.
In this embodiment, the cable temperature sensor is a temperature sensing optical fiber 14, the temperature sensing optical fiber 14 is distributed on a surface (inner surface) of the harness body 2 contacting the cable along the length direction, the temperature sensing optical fiber 14 contacts the cable surface after the harness body is bound on the cable surface, and the optical fiber may adopt necessary protection measures, such as adding a protection layer to the outside, which is not described herein again.
In this embodiment, the circular current transformer 6 is fixed on the base 1, and the fixed position facilitates the passing of a cable ground wire; the base 1 can be made of materials with certain strength, such as rigid plastics, a circulating current transformer (current transformer) is fixed on the base 1, and a cable grounding wire penetrates through the base 1 after installation to form a real-time monitoring structure; as shown in the figure, the circulating current transformer 6 is fixed at one end of the base 1 in the length direction, and a detection part (annular) is convenient for a grounding wire to pass through;
the signal acquisition unit further comprises a thermal imager 5, the thermal imager 5 is fixed on the base 1, and the fixed direction enables a probe of the thermal imager to be aligned to a position to be detected after the belt body is bound on the cable; the thermal imaging instrument can detect the temperature change of the cable and the uneven distribution of the temperature, so that the fire hazard is found; when the device is used, after the base body is installed, the position of the base 1 enables the detecting head of the thermal imager 5 to be opposite to a position to be detected, and a certain mechanical arm section is adopted, for example, the base 1 is provided with a thermal imager installing seat 9 which can adjust the installing direction of the thermal imager 5; after the thermal imager detects the image, the image can be transmitted to a field display screen through the central processing unit, can be checked during inspection, and can also be remotely transmitted to a management center at the same time, thereby being beneficial to real-time monitoring; the thermal imager can find the temperature change caused by smoldering in the cable, so that the fire can be found in time, and certainly, the temperature change of the cable temperature sensor has the effect, and the two mutually complement and verify;
the gas detection sensor 10, the ambient temperature sensor 11 and the smoke detector 12 are respectively fixed on the outer side surface of the base body 1 or the outer side surface of the belt body; in this embodiment, the base 1 is provided with a mesh-shaped breathable mounting position for mounting a gas detection sensor, an ambient temperature sensor and a smoke detector; for example, the outer surface of the substrate 1 (i.e. the surface facing outward relative to the surface tightly attached to the cable) can avoid the influence of the internal temperature of the cable on the sensor as much as possible, and can be mutually matched with other detection equipment (such as a cable temperature sensor) for mutual verification, so that the accuracy of judgment is improved; the installation mode can adopt the existing mechanical installation structure, the bridle body generally adopts a plastic material (which can be the same as the base body material) with certain strength and flexibility, the outer surface of the base body 1 is provided with an installation seat with reticular holes, the sensor is installed on the installation seat and covered with a reticular protective layer, and the protective layer is provided with reticular vent holes, so that the installation is firm and is favorable for ventilation, and the accuracy of the acquisition parameters is ensured;
a plurality of longitudinal strip-shaped openings 102 are formed in the belt body 2 in parallel along the transverse direction, and the arrangement of the strip-shaped openings 102 can reduce the wrapping of cables and is beneficial to heat dissipation; temperature sensing optic fibre for many correspond arrange in the horizontal both sides of bar mouth, in order to guarantee the installation effect, the internal surface of band (hugging closely the cable) corresponds with optic fibre and sets up longitudinal groove, and optic fibre corresponds embedding longitudinal groove to radial part exposes a longitudinal groove (guaranteeing to paste tightly with the cable), and the internal surface of band still covers has the protective layer, and this protective layer needs to have better heat conductivility, guarantees the accuracy of detection temperature when doing benefit to the protection optic fibre.
As shown in the figure, gas detection sensor 10, ambient temperature sensor 11 and smoke detector 12 arrange respectively on base 1 or the band body 2 of the horizontal both sides of bar mouth, and the distribution is even, mutual noninterference, and of course, this embodiment position is installed on the base, if the position allows, also can install on the band body 2, then the response is more timely sensitive.
In this embodiment, the central processing unit 3 and the output unit 4 are fixedly disposed on the base in a waterproof, dustproof and heat-dissipating manner; the central processing unit and the output unit (except for the display screen and the wireless output antenna) can be packaged by a sealed structure 8 (such as a plastic box body, a waterproof ventilation structure can be adopted, such as a ventilation opening positioned at the bottom), and are installed on the base 1 by adopting the existing mechanical mode, and the description is omitted;
the belt buckle is of a self-locking structure, the lock catch is a pawl 7, the belt body 2 is provided with a ratchet 201 matched with the pawl, the pawl 7 is arranged on the base in a lever mode and can swing in a return elastic force mode, and the resistance end of the pawl 7 can be operated to swing and exposed out of the base; as shown in the figure, the pawl 1 is a rod-shaped structure and is arranged on the base 1 through a pin 701 and with the pin as a fulcrum, of course, a relevant slot hole needs to be formed on the base 1 for accommodating the pawl, as shown in the figure, a slot 101 is formed for accommodating the pawl 7, and details are not repeated herein; meanwhile, the pin 701 is provided with a torsion spring 13, one end of the torsion spring 13 is fixed on the base 1, the other end of the torsion spring 13 applies a twisting force to the pawl 7, the arrangement mode of the torsion spring is a known structure, and details are not repeated; the torsional force enables the pawl 7 to swing towards the ratchet 201 to form meshing, the other end of the pawl 7 is exposed out of the base through the groove 101, the pawl is separated from the ratchet through manual pressing, and the strap body can slide out of the slide way on the base; therefore, the structure is a detachable structure, and can be maintained and replaced, and the details are not repeated.
The utility model discloses when using, can adopt hierarchical early warning mode according to the possibility that the conflagration probably takes place, of course, just the utility model discloses a one of them application method specifically can include following step:
a. detecting circulation data of the tunnel cable, if the circulation data exceed a set threshold value, setting a first-stage early warning according to a circulation data range, and setting a risk score; the circulating current data is generally the current of a grounding wire, if the current of the grounding wire is smaller or disappears compared with a normal value, the current is abnormal, and corresponding early warning is sent out according to a set threshold value;
b. detecting surface temperature data of the tunnel cable no matter whether the circulation data exceeds a set range or not, if the circulation data exceeds a set threshold, the surface temperature also exceeds the set threshold (generally, the temperature change rate can be also the temperature, but the judgment needs to be combined with the normal surface temperature), setting a risk score and accumulating the risk score with the circulation data, if the circulation data is normal, only accumulating the risk score of the surface temperature, and if the score reaches the set value, setting the second-stage early warning;
c. detecting gas content data near the tunnel cable, wherein the gas content data generally includes oxygen content and carbon monoxide content, and of course, different other detection sensors can be adopted according to different materials, which are not described herein again; detecting gas content data near the tunnel cable whether the parameters in the steps a and b exceed a threshold value or not; if all or one of the steps a and b exceeds a set threshold and the gas content also exceeds the set threshold, setting a risk score and accumulating the risk score with the risk score of the steps a and b, if the data of the steps a and b are normal, only accumulating the risk score of the gas content, and when the score reaches a set value, setting a third-stage early warning;
d. detecting thermal imaging data of the tunnel cable (acquiring local high temperature inside the cable), detecting the thermal imaging data of the tunnel cable no matter whether the parameters in the steps a, b and c exceed the threshold value, and detecting the temperature rise degree and the area range of the high temperature; if the parameters of the steps a, b and c exceed the set threshold, the thermal imaging data of the surface tunnel cable also exceed the set threshold, setting a risk score and accumulating the risk score with the risk scores of the steps a, b and c, and if the parameters of the steps a, b and c are normal, only setting the risk score of the thermal imaging data; when the score reaches a set value, setting the score as a fourth-stage early warning;
e. detecting ambient temperature data near the tunnel cable, wherein the ambient temperature data can adopt a temperature change rate or a temperature value (which needs to be obtained under the comparison of ambient normal temperature); detecting ambient temperature data near the tunnel cable regardless of whether the parameters in steps a, b, c and d exceed a threshold; if all or part of the steps a, b, c and d exceed a set threshold value and the environmental temperature data also exceed the set threshold value, setting a risk score and accumulating the risk score with the risk score of the steps a, b, c and d, if the data of the steps a, b, c and d are normal, only accumulating the risk score of the environmental temperature data, and when the score reaches a set value, setting a fifth-level early warning;
f. detecting smoke concentration data or/and open fire data in the vicinity of the tunnel cable; detecting smoke concentration data or/and open fire data near the tunnel cable, regardless of whether the parameters in steps a, b, c, d and e exceed a threshold value; if all or part of the steps a, b, c, d and e exceed the set threshold value, and smoke or/and open fire in the field can be presumed to be a cable fire, setting as a sixth-level early warning; and if the data in the steps a, b, c, d and e are normal and only smoke or/and open fire exists, setting a risk score for the environmental fire and setting a corresponding early warning level according to the risk score.
In the embodiment, the first-stage early warning to the sixth-stage early warning in the steps a to f are respectively corresponding to set risk values, and the early warning is sent out when the early warning grading accumulated value reaches a set value;
and g, when the risk score is larger than a set value, sending out fire early warning alarms, including on-site acousto-optic alarm and remote management center early warning.
In this embodiment, the set score value is different according to the level.
Such as: presetting a circulating current alarm threshold, a cable body temperature alarm threshold, a thermal imaging area alarm threshold, an oxygen and carbon monoxide concentration alarm threshold, and an ambient temperature and temperature change rate alarm threshold.
(1) Comparing the circulation value acquired by the receiving circulation transformer with a preset circulation preset threshold value, and adding 1 to the fire risk accumulated value according to the first early warning level risk value of the fire when the acquired value reaches the preset threshold value, so as to realize the first-level early warning monitoring of the fire; meanwhile, early warning of cable maintenance can be sent;
(2) comparing the temperature value acquired by the cable temperature-sensing optical fiber with a preset body temperature preset threshold, and adding 2 to the accumulated fire risk value according to the second early warning level risk value of the fire when the acquired value reaches the body temperature preset threshold (under the condition of the known normal temperature of the body) or the temperature change rate is higher; the fire hazard probability is judged by combining the change of other parameters when early warning is sent out, and if the fire hazard probability does not exist, the reason needs to be checked on site;
(3) performing mode identification on the received thermal imaging picture when a thermal imaging fire (smoldering) area region reaches a preset area region; or receiving gas concentration values acquired by ambient oxygen, carbon monoxide and toxic gas concentration sensors, and adding 3 to the fire risk accumulated value according to the fire third early warning level risk value when the acquired gas concentration values reach the preset concentration threshold values of the gases or the oxygen content is lower than the preset concentration value; and send out the early warning of possible fire;
(4) receiving data collected by a temperature sensor or/and a humidity sensor in the tunnel, and adding 4 to a fire risk accumulated value according to a fire fifth early warning level risk value when a collected temperature value reaches an environmental temperature preset threshold value or when a collected humidity value is lower than an environmental humidity preset threshold value (generally under the condition of knowing normal environmental temperature and humidity, or a unit time change rate reaches a threshold value, generally adopting the change rate as a reference);
(5) receiving signals of the open fire detector or/and the smoke detector, giving an alarm when the flame detector detects open fire, and adding 5 to the accumulated fire risk value according to the fourth early warning level risk score of the fire;
(7) the monitoring host reads the fire risk accumulated value, and when the fire risk accumulated value is larger than a set value (such as 4, certainly, when data values of all the sensors are abnormal, signals are also sent to the management center so as to be convenient for daily maintenance as reference), the central processing unit sends fire early warning signals to the remote monitoring center and sends corresponding monitoring data at the same time.
(8) During normal use, the accumulated fire risk value can be cleared in a set period, and the steps (1) to (7) are repeated.
When the utility model is used, the belt body is bound on the outer circumference of the tunnel cable along the circumferential direction through the base (the temperature sensing optical fiber is tightly attached to the outer surface of the cable), and each device (sensor) is arranged at a set position, so that each device (sensor) can acquire accurate signals, and the description is omitted; the utility model discloses an establish signal and electric connection channel between signal acquisition unit, central processing unit and the output unit, belong to well-known technique, no longer describe here.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. The utility model provides a tunnel cable fire monitoring device which characterized in that: the method comprises the following steps:
the signal acquisition unit is used for acquiring data parameters related to the fire disaster of the cable;
the central processing unit is used for receiving and processing the data parameters of the signal acquisition unit;
the output unit receives and outputs the command signal of the central processing unit;
the tunnel cable fixing device is characterized by also comprising a base body, wherein the base body is fixedly arranged at a set position of the tunnel cable;
the signal acquisition unit, the central processing unit and the output unit are arranged on the base body;
the signal acquisition unit includes:
the circulating current transformer is used for detecting circulating current data of the tunnel cable;
the cable temperature sensor is used for acquiring temperature data of the tunnel cable;
and the gas detection sensor is used for acquiring the change data of the gas content of the environment around the tunnel cable.
2. The tunneling cable fire monitoring apparatus according to claim 1, wherein: the signal acquisition unit further includes:
an ambient temperature sensor for detecting ambient temperature data near the cable;
the smoke detector is used for detecting smoke concentration data near the detection cable;
and the open fire detector is used for detecting open fire generated by the tunnel cable and nearby.
3. The tunneling cable fire monitoring apparatus according to claim 2, wherein: the base member includes the area body and band buckle device, the band buckle device includes the base and sets up the hasp on the base, be equipped with the slide that is used for the area body to pass on the base, the base is fixed in to area body one end, and the other end passes the slide and makes the area body and base form the binding structure jointly through hasp locking.
4. The tunneling cable fire monitoring apparatus according to claim 3, wherein: the cable temperature sensor is a temperature sensing optical fiber, the temperature sensing optical fiber is distributed on the surface of the bundling body contacting with the cable along the length direction, and the temperature sensing optical fiber contacts with the surface of the cable after the bundling body is bundled on the surface of the cable.
5. The tunneling cable fire monitoring apparatus according to claim 4, wherein: the circulating current transformer is fixed on the base, and the fixed position is convenient for a cable grounding wire to pass through;
the signal acquisition unit further comprises a thermal imager, the thermal imager is fixed on the base, and the fixed direction enables the thermal imager probe to be aligned to a position to be detected after the belt body is bound on the cable;
the gas detection sensor, the environment temperature sensor and the smoke detector are respectively fixed on the outer side surface of the base or the outer side surface of the belt body, and the base is provided with a ventilating mounting position for placing the gas detection sensor, the environment temperature sensor and the smoke detector;
the ribbon body is transversely provided with a plurality of longitudinal strip-shaped openings in parallel, and the temperature sensing optical fibers are correspondingly arranged on the two transverse sides of the strip-shaped openings.
6. The tunneling cable fire monitoring apparatus according to claim 3, wherein: the central processing unit and the output unit are fixedly arranged on the base in a waterproof, dustproof and heat-dissipation manner.
7. The tunneling cable fire monitoring apparatus according to claim 3, wherein: the binding belt buckle is of a self-locking structure, the lock catch is a pawl, the binding belt body is provided with a ratchet matched with the pawl, the pawl is arranged on the base in a lever mode and can swing in a return elastic force mode, and the resistance end of the pawl can be operated and swing to be exposed out of the base.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921940212.2U CN211375742U (en) | 2019-11-11 | 2019-11-11 | Tunnel cable fire monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921940212.2U CN211375742U (en) | 2019-11-11 | 2019-11-11 | Tunnel cable fire monitoring device |
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| CN211375742U true CN211375742U (en) | 2020-08-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092677A (en) * | 2021-03-31 | 2021-07-09 | 杭州市市政工程集团有限公司 | Integrated monitoring and alarming device for high-voltage power tunnel |
| CN114360190A (en) * | 2021-12-31 | 2022-04-15 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
| CN117690252A (en) * | 2024-01-31 | 2024-03-12 | 国网四川省电力公司成都供电公司 | Multispectral image type fire alarm system |
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2019
- 2019-11-11 CN CN201921940212.2U patent/CN211375742U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092677A (en) * | 2021-03-31 | 2021-07-09 | 杭州市市政工程集团有限公司 | Integrated monitoring and alarming device for high-voltage power tunnel |
| CN114360190A (en) * | 2021-12-31 | 2022-04-15 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
| CN114360190B (en) * | 2021-12-31 | 2024-03-22 | 上海震旦施密茨消防装备有限公司 | Fire alarm system for underground cable and working method thereof |
| CN117690252A (en) * | 2024-01-31 | 2024-03-12 | 国网四川省电力公司成都供电公司 | Multispectral image type fire alarm system |
| CN117690252B (en) * | 2024-01-31 | 2024-04-09 | 国网四川省电力公司成都供电公司 | Multispectral image type fire alarm system |
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