Fire alarm equipment, control system and method for cable tunnel of urban integrated substation

Abstract

The present invention discloses a fire alarm device and control system and method for a cable tunnel in an urban integrated substation, which mainly relates to the field of cable tunnel fire protection. It includes a node-type monitoring assembly and a node-type adjustment assembly. The node-type monitoring assembly includes a monitoring terminal, and a plurality of the monitoring terminals are distributed in a node-like manner in the cable tunnel, and adjacent monitoring terminals are interconnected. The beneficial effect of the present invention is that when a fire problem occurs in a cable tunnel, the information of the fire problem can be identified as accurately as possible, and targeted processing can be performed according to different fire problem information, so as to eliminate the fire problem in the most reasonable way, thereby ensuring that even if a fire occurs in the cable tunnel, the fire in the tunnel can be effectively controlled to reduce the damage to personal injury and property economy caused by the fire.

Description

Technical Field

[0001] The present invention relates to fire alarm equipment, a control system and a method for a cable tunnel in an urban integrated substation, and belongs to the technical field of cable tunnel fire protection. Background Art

[0002] With the continuous development of my country's power grid system, many traditional cables do not meet the installation requirements, and high-voltage cable equipment needs to be built to meet the cable installation requirements. In order to ensure the safety of power grid system construction, the convenience of subsequent maintenance, and the transmission efficiency after the construction of the power grid, it is necessary to build cable tunnels for some cables with high transmission efficiency and harsh environmental protection conditions. After the cable tunnel is built, it can not only protect the cable, but also facilitate the staff to repair the problems that arise when the cable is in use, which is more conducive to the long-term and stable power transmission of the cable.

[0003] However, when constructing cable tunnels, the most important thing is to prevent fire in cable tunnels. The insulation materials, fillers and covering layers of cables are mostly combustible materials, such as rubber, plastic, insulating oil, etc., which are easily ignited. Especially for polyvinyl chloride plastic cables, at high temperatures of 150-270℃, although the cables do not catch fire, flammable gases and black smoke have been released. The smoke contains a large amount of toxic HCL gas, which poses a threat to human life. Moreover, the phase-to-phase distance of the cable is very small, and it is mainly insulated by insulating materials. Due to mechanical damage or ground subsidence, or corrosive gases or liquids, the cable protective layer is damaged, resulting in cable insulation breakdown, arcing, and ignition of the insulation layer and filler, which causes a chain reaction and damage to the cable. In addition, cable tunnels are underground spaces. Unlike ground buildings that have glass windows to communicate with the atmosphere, cable tunnels are limited by conditions, and there are few holes that communicate with the atmosphere and the area is small. When a fire occurs, hot smoke cannot be discharged, and heat is accumulated and dissipated slowly. The temperature of the space rises quickly, and flashover may occur earlier. The temperature of the involved areas will rise sharply, which will cause the original unburned combustibles to burn, so that all the combustibles in the fire space will burn, and the air volume will expand rapidly, and the concentration of harmful gases such as carbon monoxide and carbon dioxide will increase rapidly. Wherever this high-temperature smoke rushes to, the combustibles there will burn quickly, so it is very important to prevent fire inside the cable tunnel.

[0004] Based on the above problems, it is necessary to design fire alarm equipment, control system and method for cable tunnels in urban integrated substations to ensure that the fire in the cable tunnel will not cause a major impact, so as to ensure the fire safety of the cable tunnel. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a fire alarm device, a control system and a method for a cable tunnel in an urban integrated substation, which can be set according to the characteristics of the fire inside the cable tunnel, and the fire inside the cable tunnel can be monitored in real time in a targeted manner, thereby ensuring that the fire in the cable tunnel will not cause a major impact, thereby ensuring the fire safety of the cable tunnel.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] In a first aspect, an embodiment of the present invention provides a fire-fighting device for a cable tunnel of an urban integrated substation, comprising a node-type monitoring assembly (1) and a node-type regulating assembly (2);

[0008] The node-type monitoring assembly (1) comprises a monitoring terminal (3), wherein a plurality of the monitoring terminals (3) are distributed in a node-type manner in the cable tunnel, and adjacent monitoring terminals (3) are connected to each other;

[0009] The node-type adjustment assembly (2) is arranged in conjunction with the node-type monitoring assembly (1), and the node-type adjustment assembly (2) includes an angle adjustment mechanism and a position adjustment mechanism. The angle adjustment mechanism and the position adjustment mechanism are arranged in conjunction with each other and are connected to the monitoring terminal (3). The monitoring terminal (3) is adjusted by means of the angle adjustment mechanism and the position adjustment mechanism.

[0010] As a possible implementation of this embodiment, the position adjustment mechanism comprises a translation slide rail (4) and a sliding base (5), wherein the translation slide rail (4) is cooperatively arranged in the cable tunnel, and the sliding base (5) equipped with a driving member is cooperatively arranged on the translation slide rail (4);

[0011] The sliding base (5) is made of high temperature resistant material.

[0012] As a possible implementation of this embodiment, the angle adjustment mechanism includes a transverse rotating shaft (6) and a longitudinal rotating shaft (7). The transverse rotating shaft (6) is arranged in conjunction with the longitudinal rotating shaft (7) and is connected to the sliding base (5). The monitoring terminal (3) is driven by the transverse rotating shaft (6) and the longitudinal rotating shaft (7) to perform transverse and longitudinal angle adjustment.

[0013] As a possible implementation of this embodiment, each monitoring terminal (3) is provided with an image recognition component (8) and a gas sensor (9), and the image recognition component (8) is used to recognize the image in the cable tunnel; and the gas concentration in the cable tunnel is identified and monitored by the gas sensor (9).

[0014] As a possible implementation of this embodiment, the gas sensor (9) is provided with a fan assembly, and the gas in the cable tunnel is sucked into the monitoring terminal (3) through the fan assembly.

[0015] In a first aspect, an embodiment of the present invention provides a control system for the above-mentioned urban integrated substation cable tunnel fire protection device, comprising a PLC integrated control board, wherein the PLC integrated control board is respectively connected to the node-type monitoring assembly (1) and the node-type regulating assembly (2), and controls the node-type monitoring assembly (1) and the node-type regulating assembly (2);

[0016] An isolation device (10) is provided between two adjacent node-type monitoring assemblies (1), and the cable tunnel is divided into areas by a plurality of the isolation devices (10).

[0017] As a possible implementation of this embodiment, the image recognition element (8) and the gas sensor (9) of the monitoring terminal (3) are both connected to the PLC integrated control board;

[0018] When the image recognition component (8) detects fire image information or the gas sensor (9) detects unconventional gas information, the detection information is transmitted to the PLC integrated control board, and the PLC integrated control board performs digital-to-analog conversion, and transmits isolation information to the isolation devices (10) on both sides of the monitoring terminal (3), so that the isolation devices (10) isolate the node area where the monitoring terminal (3) is located.

[0019] As a possible implementation of this embodiment, the isolation device (10) includes a dry powder fire extinguishing component, which includes a dry powder chamber and a suction device, and the suction device is configured to cooperate with the dry powder chamber; when the PLC integrated control board transmits reasonable information to the suction device, the fire extinguishing agent in the dry powder chamber is transferred to the spraying port position of the cable tunnel through the suction device.

[0020] As a possible implementation of this embodiment, the isolation device (10) further includes an alarm terminal, and the PLC integrated control panel is connected to the alarm terminal wirelessly or in an effective manner.

[0021] In a third aspect, an application method of a control system of a cable tunnel fire protection device of an urban integrated substation provided by an embodiment of the present invention comprises the following steps:

[0022] S1, setting a node-type monitoring assembly (1) and a node-type regulating assembly (2) in the cable track, dividing the cable tunnel into a plurality of node areas, and connecting a PLC integrated control panel with each node-type monitoring assembly (1) and node-type regulating assembly (2);

[0023] S2, when the gas sensor (9) of the node-type monitoring assembly (1) in area A detects the presence of unconventional gas in area A, the gas sensor (9) in area A transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor (9) in area A;

[0024] When the concentration of unconventional gas is lower than the concentration of safe gas, the PLC integrated control board transmits the alarm information to the alarm terminal. After the alarm terminal receives the alarm information transmitted by the PLC integrated control board, the staff will check the cables at the location of area A for fire hazards.

[0025] When the concentration of unconventional gas is greater than the concentration of safe gas, the PLC integrated control panel transmits the alarm information to the alarm terminal and enables the staff to respond accordingly; and the PLC integrated control panel transmits the gas detection information of area A to the isolation device (10), so that the PLC integrated control panel controls the suction devices on both sides of area A, so that the suction devices suck the fire extinguishing agent in the dry powder chamber and spray it at the spraying ports on both sides of area A;

[0026] S3, when the gas sensor (9) of the node-type monitoring assembly (1) in the area B and / or the area C adjacent to the area A detects the presence of unconventional gas in the area B and / or the area C, the gas sensor (9) in the area B and / or the area C transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor (9) in the area B and / or the area C;

[0027] The PLC integrated control board transmits the gas detection information of the B area and / or the C area to the isolation device (10), so that the PLC integrated control board controls the suction equipment in the B area and / or the C area away from the A area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber and sprays it in the B area and / or the C area at the spraying port of the A area;

[0028] S4, when the image recognition component (8) of the node-type monitoring assembly (1) in area A detects the presence of an abnormal light source in area A, the image recognition component (8) in area A transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component (8) in area A;

[0029] The PLC integrated control panel transmits the abnormal information of area A to the isolation device (10) in areas B and C far away from area A, so that the PLC integrated control panel controls the suction device in areas B and C far away from area A, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in areas B and C far away from area A;

[0030] S5, when the image recognition component (8) of the node-type monitoring assembly (1) in the B area and / or the C area detects the presence of an abnormal light source in the B area and / or the C area, the image recognition component (8) in the B area and / or the C area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component (8) in the B area and / or the C area;

[0031] The PLC integrated control panel transmits the abnormal light source information of the B area and / or the C area to the isolation device (10) in the D area and / or the E area far away from the B area and / or the C area, so that the PLC integrated control panel controls the suction device in the D area and / or the E area far away from the B area and / or the C area, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in the D area and / or the E area far away from the B area and / or the C area;

[0032] S6, if the image recognition component (8) of the node-type monitoring assembly (1) in the D area and / or the E area also detects an abnormal light source in the D area and / or the E area, the image recognition component (8) in the D area and / or the E area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information;

[0033] The PLC integrated control panel controls the isolation equipment (10) in multiple areas outside the adjacent D area and / or E area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber in multiple areas outside the adjacent D area and / or E area and sprays it at the spraying port position of the area, forming a multi-layer spraying isolation layer until the abnormal light source is isolated and controlled within a certain area.

[0034] The technical solution of the embodiment of the present invention may have the following beneficial effects:

[0035] When setting up the fire-fighting device, the present invention adjusts the position of the node-type monitoring assembly through the node-type adjustment assembly, and enables the node-type monitoring assembly to identify the fire-fighting information in the area to which it belongs. When setting up the node-type monitoring assembly, the monitoring assembly is set as an image recognition component and a gas sensor, and the image recognition component is used to identify the fire combustion information, and the gas sensor is used to identify the unconventional gas in the cable tunnel, so as to achieve the best fire monitoring effect.

[0036] In view of the characteristics of the spread of unconventional gases and fire in cable tunnels, when applying fire-fighting devices and control systems, the present invention divides the cable tunnel into areas and uses isolation equipment to perform regional fire-fighting isolation; and in view of the spread of fire sources and unconventional gases in the cable tunnel, isolation operations are performed on isolation equipment in different areas under different circumstances, so as to deal with fire-fighting problems in cable tunnels in a targeted manner and avoid large property losses in cable tunnels due to fire-fighting.

[0037] The present invention can avoid fire problems in cable tunnels, identify the information of fire problems as accurately as possible, and carry out targeted processing according to different fire problem information, so as to eliminate the fire problems in the most reasonable way, thereby ensuring that even if fire occurs in the cable tunnel, the fire in the tunnel can be effectively controlled to reduce the damage to personal injury and property economy caused by the fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of a cable tunnel fire alarm device for an urban integrated substation according to an exemplary embodiment;

[0039] Figure 2 The figure is a region division diagram according to an exemplary embodiment.

[0040] Figure 3 1 is a schematic diagram of the performance of step S2 in the method of the cable tunnel fire alarm device and control system of the urban integrated substation according to an exemplary embodiment (it should be noted here that because the isolation device and the monitoring terminal cannot be clearly represented in the accompanying drawings, the square here represents the monitoring terminal, the triangle represents the isolation device, and the dotted line at the triangle position in the figure indicates that the isolation device does not perform isolation spraying, and the solid line at the triangle position indicates that the isolation device performs isolation spraying operation. Figure 4-6 Chinese and Attached Figure 3 consistent with the statement in );

[0041] Figure 4 It is a schematic diagram showing step S3 in a method for fire alarm equipment and control system of a cable tunnel of an urban integrated substation according to an exemplary embodiment.

[0042] Figure 5 It is a schematic diagram showing step S4 in a method for a cable tunnel fire alarm device and control system for an urban integrated substation according to an exemplary embodiment.

[0043] Figure 6 It is a schematic diagram showing step S5 in a method for a cable tunnel fire alarm device and control system for an urban integrated substation according to an exemplary embodiment.

[0044] Figure 7 It is a schematic diagram of a control system of a cable tunnel fire alarm device in an urban integrated substation according to an exemplary embodiment.

[0045] Figure 8 It is a schematic diagram of the proportion of unconventional gas types and different types of gases generated when the cable sheath polymer is burned in a method of a cable tunnel fire alarm device and control system for an urban integrated substation according to an exemplary embodiment.

[0046] In the figure, 1. Node-type monitoring assembly; 2. Node-type adjustment assembly; 3. Monitoring terminal; 4. Translational slide rail; 5. Sliding base; 6. Horizontal rotating shaft; 7. Longitudinal rotating shaft; 8. Image recognition component; 9. Gas sensor; 10. Isolation equipment. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0048] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The present invention omits the description of known components and processing techniques and processes to avoid unnecessary limitations on the present invention.

[0049] Because when a fire occurs in a cable tunnel, there is not much time left for the fire-fighting equipment to start, and it is easy for a large-scale fire to occur. It is also recorded in the background technology that because the space in the cable tunnel is highly airtight, the heat generated when the cable burns cannot diffuse outward, and the high-temperature smoke is more likely to diffuse toward other locations, thereby causing fires in cables at other locations. And when a fire occurs in a cable tunnel, the high-temperature concentration smoke will diverge toward the tunnels on both sides of the smoke point, and because of the temperature difference and gas concentration difference, the smoke will diffuse to both sides very quickly, and in some cases the staff cannot escape the cable tunnel fire area in time, which can easily lead to staff casualties and fail to ensure the personal safety of the staff.

[0050] The characteristics of fire in cable tunnels are as follows:

[0051] 1. Most cables installed in cable tunnels have high transmission efficiency, which results in thicker outer protective shells. Therefore, when the cable has heating problems, it will not burn the outer protective shell of the cable in an instant, but will take some time. Because it takes a certain amount of time for the cable to soften and burn after heating, and when the cable softens, some unconventional gases will be produced, such as Figure 8 As shown in the figure, it is a tabular diagram of some unconventional gases. The staff may smell different odors during the inspection, thereby discovering the source of danger and taking targeted measures to solve it. When the staff cannot smell these odors, it may cause cable fires.

[0052] 2. Because the environment in the cable tunnel is relatively closed, when the cable burns, the heat generated will heat the air in the tunnel, causing it to diffuse to both sides. And because of the temperature difference and smoke concentration difference, a large pressure difference will be generated, causing the smoke to diffuse quickly to both sides of the tunnel, and then the high-temperature smoke will transfer heat to other cables, causing cables in other locations to burn, triggering a chain reaction in the cable tunnel.

[0053] Based on the above characteristics of fire in cable tunnels, targeted settings are made:

[0054] like Figure 1 As shown, the urban integrated substation cable tunnel fire alarm equipment provided by the embodiment of the present invention includes a node-type monitoring assembly 1 and a node-type adjustment assembly 2; because of the characteristics of the fire in the cable tunnel, the direction of diffusion of smoke, temperature, and fire source will only diffuse toward the two ends of the cable tunnel, so there will be a problem of rapid diffusion during the diffusion. When the fire-fighting device here is set up, it is set according to the fire source situation in the tunnel, so that after accurately obtaining the fire source information in the cable tunnel, the fire source can be targeted for elimination, thereby avoiding the chain diffusion of the fire source in the cable tunnel. Therefore, for the node-type monitoring assembly 1, including a monitoring terminal 3, a plurality of the monitoring terminals 3 are distributed in a node-like manner in the cable tunnel, and the adjacent monitoring terminals 3 are interconnected; after the monitoring terminals 3 are installed in a node-like manner, their settings are as follows: Figure 2As shown, the environment in the cable tunnel is set up as a node region. When a fire problem occurs at a certain position in the cable tunnel, one or two monitoring terminals 3 close to the fire problem will identify the fire problem information and issue a warning for the fire problem information, thereby realizing the warning operation of the fire information. Under normal circumstances, the monitoring terminal 3 close to the fire situation can most directly monitor the specific information of the fire situation, and in order to realize the monitoring terminal 3 to monitor the specific situation of the fire point at a close distance, it is necessary to enable the position of the monitoring terminal 3 to be able to move, so that the monitoring terminal 3 can better monitor the fire information of the cable tunnel. Therefore, a node-type adjustment assembly 2 is set; and it is set in conjunction with the node-type monitoring assembly 1, including an angle adjustment mechanism and a position adjustment mechanism. The angle adjustment mechanism is set in conjunction with the position adjustment mechanism and is connected to the monitoring terminal 3. The monitoring terminal 3 is adjusted by the angle adjustment mechanism and the position adjustment mechanism.

[0055] The position adjustment mechanism includes a translation slide 4 and a sliding base 5. The translation slide 4 is arranged in the cable tunnel, and the sliding base 5 equipped with a driving member is arranged on the translation slide 4. In order to enable the monitoring terminal 3 to monitor the fire more intuitively, the translation slide 4 can be arranged at the top of the cable tunnel, so that the connected monitoring terminal 3 can monitor the cables below the location more intuitively. It should be noted here that when the cable in the cable tunnel burns, the heat generated will quickly burn the components in the monitoring terminal 3. However, before the internal parts of the monitoring terminal 3 are burned, the most effective information can be obtained, which can achieve the purpose of its setting. However, when setting the sliding base 5, the monitoring terminal 3 should be prevented from being damaged by large heat. Therefore, the sliding base 5 is set to a high temperature resistant material, so that the sliding base 5 can effectively drive the monitoring terminal 3 to move in position with the driving member, thereby avoiding the problem that the monitoring terminal 3 cannot move in position on the translation slide 4, resulting in the inability to monitor the fire. The angle adjustment mechanism includes a transverse rotating shaft 6 and a longitudinal rotating shaft 7. The transverse rotating shaft 6 is matched with the longitudinal rotating shaft 7 and connected to the sliding base 5. The monitoring terminal 3 is driven by the transverse rotating shaft 6 and the longitudinal rotating shaft 7 to adjust the transverse and longitudinal angles. The angle adjustment mechanism can be used to adjust the tilt direction of the monitoring terminal 3, so as to monitor multiple angle positions in the cable tunnel to achieve the best monitoring standard. The angle adjustment mechanism here needs to monitor the cable fire protection problem during daily monitoring. When a fire is found, the angle adjustment mechanism does not need to be adjusted, so that the monitoring terminal 3 can lock the fire position, so as to more accurately monitor the specific situation of the fire.

[0056] The monitoring terminal 3 is required to monitor the environment in the cable tunnel, and the monitoring content needs to be set according to the characteristics of the cable burning, as shown in the attached figure of the specification. Figure 8 As shown in the figure, it is the proportion of different types of gases generated by the cable shell polymer when it is burned. It can be seen from the figure that a lot of toxic gases will be generated when the cable is burned, and the corresponding sensors are used to detect these toxic gases to determine the burning condition of the cable. It should be understood here that when the cable is heated, the protective layer of the cable will also be heated, and when the protective layer is heated, even if there is no combustion, the protective layer of the cable will emit toxic gases, and these gases should not exist under normal conditions. Therefore, the set gas sensor 9 can detect some gases that should not exist in the cable tunnel, so as to determine whether the cable is in an abnormal state and promptly remind the staff to investigate the fire problem. Therefore, the monitoring terminal 3 is set here, that is, each of the monitoring terminals 3 is provided with an image recognition component 8 and a gas sensor 9, and the image in the cable tunnel is recognized by the image recognition component 8; and the gas concentration in the cable tunnel is recognized and monitored by the gas sensor 9, so as to achieve the above-mentioned detection effect. Of course, because the air environment inside the cable is relatively closed, when the gas sensor 9 performs gas identification, it is necessary to quickly monitor the gas that should not exist in the cable tunnel. However, when the cable is heated, the concentration of the unconventional gas emitted is small, which makes it impossible for the gas sensor 9 to quickly identify the unconventional gas. Therefore, the gas sensor 9 is provided with a fan assembly, and the gas in the cable tunnel is sucked into the monitoring terminal 3 by the fan assembly; and then, under the action of the fan assembly, the gas in the cable tunnel can be quickly ventilated to the internal position of the monitoring terminal 3, and captured and detected by the gas sensor 9, thereby realizing the detection of small concentrations of unconventional gases, and further preventing fires in the cable tunnel.

[0057] Because after the above structure is set up, it is necessary to realize node-type monitoring inside the cable tunnel, so as to ensure that after the monitoring terminal 3 identifies a certain position inside the cable tunnel, it can process information through the control system and feed it back to the execution terminal for a series of execution operations, so as to control the fire in the cable tunnel. Therefore, it is necessary to set the control system in the cable tunnel according to the characteristics of the fire in the cable tunnel.

[0058] like Figure 7As shown, the control system of the fire alarm equipment of the cable tunnel of the urban integrated substation includes a PLC integrated control board, which is connected to the node-type monitoring assembly 1 and the node-type regulating assembly 2 to control the node-type monitoring assembly 1 and the node-type regulating assembly 2; because the node-type monitoring assembly 1 and the node-type regulating assembly 2 both need to be controlled by the control system, because the monitoring terminal 3 of the node-type monitoring assembly 1 needs to monitor the fire problems in the monitoring area in real time, and feed back the information to the PLC integrated control board after the problem is found. In addition, an isolation device 10 is arranged between two adjacent node-type monitoring assemblies 1, and the cable tunnel is divided into areas by a plurality of the isolation devices 10. After the PLC integrated control board receives the feedback from the node-type monitoring assembly 1, it transmits the execution information to the isolation device 10, so that the isolation device 10 isolates the node area where the node-type monitoring assembly 1 is located, thereby slowing down or isolating the speed of the fire spreading to other node areas.

[0059] It is necessary to describe the specific monitoring method of the monitoring terminal 3 here, because when a fire occurs in a cable tunnel, it will be different from the combustion nature of a traditional fire, because only the protective jacket of the cable and the electrical equipment can burn in the cable tunnel, so the difference in the unconventional gas shown during combustion is not large. Therefore, for the specific monitoring method of the monitoring terminal 3, the image recognition component 8 and the gas sensor 9 of the monitoring terminal 3 are connected to the PLC integrated control board, and the specific situation in the cable tunnel is monitored by the image recognition component 8 and the gas sensor 9, and when the image recognition component 8 detects fire image information or the gas sensor 9 detects unconventional gas information, the detection information is transmitted to the PLC integrated control board, and the PLC integrated control board performs digital-to-analog conversion, and the isolation information is transmitted to the isolation device 10 on both sides of the monitoring terminal 3, so that the isolation device 10 isolates the node area where the monitoring terminal 3 is located. When setting up here, it is necessary to pay attention to the setting requirements of the gas sensor 9, because when the cable is burning, there are many types of gases generated. Therefore, when setting up the gas sensor 9 here, it is not rigorous to only detect the concentration of one unconventional gas. Therefore, the gas sensor 9 here needs to be set up with many unconventional sensors, such as carbon monoxide sensors, nitrogen oxides and other gas detection sensors, because once one of these unconventional gases has an abnormal concentration, it means that there are fire protection problems or other problems in the cable tunnel, and the staff should be required to deal with these problems. For the isolation device 10, the isolation device 10 includes a dry powder fire extinguishing component, and the dry powder fire extinguishing component includes a dry powder chamber and a suction device. The suction device is set up in conjunction with the dry powder chamber; when the PLC integrated control board transmits reasonable information to the suction device, the fire extinguishing agent in the dry powder chamber is transferred to the spray port position of the cable tunnel through the suction device. The dry powder fire extinguishing component here is set according to the characteristics of cable fire to prevent the fire from spreading outward in the isolation area. The isolation device 10 also includes an alarm terminal, and the PLC integrated control panel is connected to the alarm terminal wirelessly or in an effective manner. When a fire occurs in the cable tunnel, the fire information is promptly reported through the alarm terminal, so that the staff can carry out targeted control of the fire according to the alarm information displayed by the alarm terminal.

[0060] The present invention also provides a method for controlling a cable tunnel fire alarm device and a control system of an urban integrated substation, comprising the following steps:

[0061] S1, setting a node-type monitoring assembly 1 and a node-type regulating assembly 2 in the cable track, dividing the cable tunnel into a plurality of node areas, and connecting a PLC integrated control panel with each node-type monitoring assembly 1 and node-type regulating assembly 2;

[0062] S2, when the gas sensor 9 of the node-type monitoring assembly 1 in area A detects the presence of unconventional gas in area A, the gas sensor 9 in area A transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor 9 in area A;

[0063] When the concentration of unconventional gas is lower than the concentration of safe gas, the PLC integrated control board transmits the alarm information to the alarm terminal. After the alarm terminal receives the alarm information transmitted by the PLC integrated control board, the staff will conduct a fire hazard inspection on the cables in area A. Because the concentration of unconventional gas at this time is lower than the threshold of safe gas concentration, in this case, the staff have the conditions to go to the scene to investigate the problem, so as to avoid the ventilation problem causing the gas sensor 9 to identify the unconventional gas accumulated in the cable tunnel, resulting in the false alarm of fire problem. Therefore, the staff can go to the scene to investigate the problem.

[0064] When the concentration of unconventional gas is greater than the concentration of safe gas, the PLC integrated control board transmits the alarm information to the alarm terminal and enables the staff to respond accordingly; and the PLC integrated control board transmits the gas detection information of area A to the isolation device 10, so that the PLC integrated control board controls the suction equipment on both sides of area A, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying ports on both sides of area A; Figure 3 As shown, because the concentration of unconventional gases here is greater than the safe gas concentration, the staff cannot conduct investigation operations here. After receiving the above alarm information, the cable power supply in the cable tunnel should be cut off. In order to prevent the unconventional gas from spreading to both sides of the cable tunnel, the isolation equipment 10 is required to spray the fire extinguishing agent. Even if there is no fire at this time, after isolating this area, the oxygen in the space in this area can be slowly reduced, so that the conditions for combustion are not met.

[0065] S3, when the gas sensor 9 of the node-type monitoring assembly 1 in the area B and / or area C adjacent to the area A detects the presence of unconventional gas in the area B and / or area C, the gas sensor 9 in the area B and / or area C transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor 9 in the area B and / or area C;

[0066] The PLC integrated control board transmits the gas detection information of the B area and / or the C area to the isolation device 10, so that the PLC integrated control board controls the suction equipment in the B area and / or the C area away from the A area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port of the A area in the B area and / or the C area; Figure 4 As shown, at this time, because fire source information may soon appear in area A, if only area A is isolated, it cannot be guaranteed that the larger unconventional gas concentration in area A will not spread to other areas, because the isolation effect of the isolation device 10 at this time is reduced for other areas with larger concentrations. Therefore, the isolation device 10 in area B and / or area C is also opened here to prevent oxygen in other areas from entering areas A, B, and C, providing combustion conditions for the cables in areas A, B, and C.

[0067] S4, when the image recognition component 8 of the node-type monitoring assembly 1 in area A detects that there is an abnormal light source in area A, the image recognition component 8 in area A transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component 8 in area A;

[0068] The PLC integrated control board transmits the abnormal information of area A to the isolation device 10 in areas B and C far away from area A, so that the PLC integrated control board controls the suction device in areas B and C far away from area A, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in areas B and C far away from area A; Figure 5 As shown, because a fire source light spot appears in area A, it means that the cables in area A will quickly spread and burn to both sides. Therefore, when a light source appears at one end, it is necessary to open the isolation device 10 in the adjacent area close to the area where the fire is located. This not only limits the scope of the fire in the fire area, that is, area A, but also has two layers of isolation devices 10 to limit the oxygen in other areas from entering area A, providing combustion conditions for the cables in area A, thereby preventing the fire in area A from spreading quickly to both sides.

[0069] S5, when the image recognition component 8 of the node-type monitoring assembly 1 in the B area and / or the C area detects the presence of an abnormal light source in the B area and / or the C area, the image recognition component 8 in the B area and / or the C area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component 8 in the B area and / or the C area;

[0070] The PLC integrated control panel transmits the abnormal light source information of the B area and / or the C area to the isolation device 10 in the D area and / or the E area far away from the B area and / or the C area, so that the PLC integrated control panel controls the suction device in the D area and / or the E area far away from the B area and / or the C area, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in the D area and / or the E area far away from the B area and / or the C area; Figure 6 As shown, as is consistent with the above S4, the two-layer isolation equipment 10 close to the fire source performs isolation spraying operations to ensure that oxygen in the outer area cannot enter the fire area, and the fire in the fire area cannot spread to other areas.

[0071] S6, if the image recognition component 8 of the node-type monitoring assembly 1 in the D area and / or the E area also detects an abnormal light source in the D area and / or the E area, the image recognition component 8 in the D area and / or the E area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information;

[0072] The PLC integrated control panel controls the isolation devices 10 in multiple areas outside the adjacent D area and / or E area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber in multiple areas outside the adjacent D area and / or E area and sprays it at the spraying port position in the area, forming a multi-layer spraying isolation layer until the abnormal light source is isolated and controlled within a certain area. Because in this case, the fire is in an uncontrollable state, so the multi-layer isolation devices 10 are all opened to reduce the spread of the fire to the outside and buy more rescue time for firefighters.

[0073] The present invention is configured according to the characteristics of the fire inside the cable tunnel, and monitors the fire inside the cable tunnel in real time in a targeted manner, thereby ensuring that the fire in the cable tunnel will not cause a significant impact, thereby ensuring the fire safety of the cable tunnel.

[0074] The present invention can avoid fire problems in cable tunnels, identify the information of fire problems as accurately as possible, and carry out targeted processing according to different fire problem information, so as to eliminate the fire problems in the most reasonable way, thereby ensuring that even if fire occurs in the cable tunnel, the fire in the tunnel can be effectively controlled to reduce the damage to personal injury and property economy caused by the fire.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. The application method of the fire alarm equipment and control system of the cable tunnel of the urban integrated substation is characterized by: The steps include: S1, setting a node-type monitoring assembly (1) and a node-type regulating assembly (2) in the cable track, dividing the cable tunnel into a plurality of node areas, and connecting a PLC integrated control panel to each node-type monitoring assembly (1) and node-type regulating assembly (2); S2, when the gas sensor (9) of the node-type monitoring assembly (1) in area A detects the presence of unconventional gas in area A, the gas sensor (9) in area A transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor (9) in area A, wherein the unconventional gas is some unconventional gas generated when the cable softens; When the concentration of unconventional gas is lower than the concentration of safe gas, the PLC integrated control board transmits the alarm information to the alarm terminal. After the alarm terminal receives the alarm information transmitted by the PLC integrated control board, the staff will check the cables at the location of area A for fire hazards. When the concentration of the unconventional gas is greater than the safe gas concentration, the PLC integrated control panel transmits the alarm information to the alarm terminal and enables the staff to respond accordingly; and the PLC integrated control panel transmits the gas detection information of area A to the isolation device (10), so that the PLC integrated control panel controls the suction devices on both sides of area A, so that the suction devices suck the fire extinguishing agent in the dry powder chamber and spray it at the spraying ports on both sides of area A; S3, when the gas sensor (9) of the node-type monitoring assembly (1) in the area B and / or the area C adjacent to the area A detects the presence of unconventional gas in the area B and / or the area C, the gas sensor (9) in the area B and / or the area C transmits the gas detection information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the gas information transmitted by the gas sensor (9) in the area B and / or the area C; The PLC integrated control board transmits the gas detection information of the B area and / or the C area to the isolation device (10), so that the PLC integrated control board controls the suction equipment in the B area and / or the C area away from the A area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber and sprays it in the B area and / or the C area at the spraying port of the A area; S4, when the image recognition component (8) of the node-type monitoring assembly (1) in area A detects the presence of an abnormal light source in area A, the image recognition component (8) in area A transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component (8) in area A; The PLC integrated control board transmits the abnormal information of area A to the isolation device (10) in areas B and C that are far away from area A, so that the PLC integrated control board controls the suction device in areas B and C that are far away from area A, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in areas B and C that are far away from area A; S5, when the image recognition component (8) of the node-type monitoring assembly (1) in the B area and / or the C area detects the presence of an abnormal light source in the B area and / or the C area, the image recognition component (8) in the B area and / or the C area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information transmitted by the image recognition component (8) in the B area and / or the C area; The PLC integrated control panel transmits the abnormal light source information of the B area and / or the C area to the isolation device (10) in the D area and / or the E area far away from the B area and / or the C area, so that the PLC integrated control panel controls the suction device in the D area and / or the E area far away from the B area and / or the C area, so that the suction device sucks the fire extinguishing agent in the dry powder chamber and sprays it at the spraying port in the D area and / or the E area far away from the B area and / or the C area; S6, if the image recognition component (8) of the node-type monitoring assembly (1) in the D area and / or the E area also detects an abnormal light source in the D area and / or the E area, the image recognition component (8) in the D area and / or the E area transmits the abnormal light source information to the PLC integrated control board, so that the PLC integrated control board performs digital-to-analog conversion on the abnormal light source information; The PLC integrated control panel controls the isolation equipment (10) in multiple areas outside the adjacent D area and / or E area, so that the suction equipment sucks the fire extinguishing agent in the dry powder chamber in multiple areas outside the adjacent D area and / or E area and sprays it at the spraying port position of the area, forming a multi-layer spraying isolation layer until the abnormal light source is isolated and controlled within a certain area.

2. A fire alarm device for a cable tunnel in an urban fusion substation, which is used to implement the application method of the fire alarm device and control system for a cable tunnel in an urban fusion substation according to claim 1, characterized in that: It includes a node-type monitoring assembly (1) and a node-type regulating assembly (2). Node monitoring assembly (1): It comprises a monitoring terminal (3), wherein a plurality of the monitoring terminals (3) are distributed in a node-like manner in the cable tunnel, and adjacent monitoring terminals (3) are connected to each other; Node type regulating assembly (2); The monitoring terminal (3) is arranged in conjunction with the node-type monitoring assembly (1), and includes an angle adjustment mechanism and a position adjustment mechanism. The angle adjustment mechanism and the position adjustment mechanism are arranged in conjunction with each other and are connected to the monitoring terminal (3). The monitoring terminal (3) is adjusted by means of the angle adjustment mechanism and the position adjustment mechanism.

3. According to claim 2, the fire alarm equipment for cable tunnel of urban integrated substation is characterized by: The position adjustment mechanism comprises a translational slide rail (4) and a sliding base (5); the translational slide rail (4) is cooperatively arranged in the cable tunnel, and the sliding base (5) equipped with a driving member is cooperatively arranged on the translational slide rail (4); The sliding base (5) is made of high temperature resistant material.

4. According to claim 3, the fire alarm equipment for cable tunnel of urban integrated substation is characterized by: The angle adjustment mechanism comprises a transverse rotating shaft (6) and a longitudinal rotating shaft (7). The transverse rotating shaft (6) and the longitudinal rotating shaft (7) are arranged in cooperation with each other and are connected to the sliding base (5). The monitoring terminal (3) is driven by the transverse rotating shaft (6) and the longitudinal rotating shaft (7) to adjust the transverse and longitudinal angles.

5. The cable tunnel fire alarm device for urban integrated substation according to claim 2 or 4 is characterized in that: Each monitoring terminal (3) is provided with an image recognition component (8) and a gas sensor (9), and the image in the cable tunnel is recognized by the image recognition component (8); and the gas concentration in the cable tunnel is recognized and monitored by the gas sensor (9).

6. According to claim 5, the fire alarm equipment for cable tunnel of urban integrated substation is characterized by: The gas sensor (9) is provided in conjunction with a fan assembly, and the gas in the cable tunnel is sucked into the interior of the monitoring terminal (3) through the fan assembly.

7. A control system for fire alarm equipment in cable tunnels of urban fusion substations, used to implement the application method of the fire alarm equipment and control system of cable tunnels of urban fusion substations as claimed in claim 1, characterized in that: It comprises a PLC integrated control panel, wherein the PLC integrated control panel is connected to the node-type monitoring assembly (1) and the node-type regulating assembly (2) to control the node-type monitoring assembly (1) and the node-type regulating assembly (2); An isolation device (10) is provided between two adjacent node-type monitoring assemblies (1), and the cable tunnel is divided into areas by a plurality of the isolation devices (10).

8. The control system of the cable tunnel fire alarm equipment of the urban integrated substation according to claim 7 is characterized by: The image recognition component (8) and the gas sensor (9) of the monitoring terminal (3) are both connected to the PLC integrated control board; When the image recognition element (8) detects fire image information or When the gas sensor (9) detects unconventional gas information, the detection information is transmitted to the PLC integrated control board, and the PLC integrated control board performs digital-to-analog conversion, and transmits isolation information to the isolation devices (10) on both sides of the monitoring terminal (3), so that the isolation devices (10) isolate the node area where the monitoring terminal (3) is located.

9. The control system of the cable tunnel fire alarm equipment of the urban integrated substation according to claim 8 is characterized by: The isolation device (10) comprises a dry powder fire extinguishing component, the dry powder fire extinguishing component comprises a dry powder chamber and a suction device, the suction device is arranged in conjunction with the dry powder chamber; when the PLC integrated control panel transmits reasonable information to the suction device, the fire extinguishing agent in the dry powder chamber is transmitted to the spraying port position of the cable tunnel through the suction device.

10. The control system of the cable tunnel fire alarm equipment of the urban integrated substation according to claim 9 is characterized by: The isolation device (10) also includes an alarm terminal, and the PLC integrated control panel is connected to the alarm terminal in a wireless or effective manner.

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