Cable trench fire extinguishing device

Abstract

The utility model provides a fire extinguishing device for a cable trench, which comprises a shell, a fire extinguishing device, a fire extinguishing device, a fire extinguishing device, a fire extinguishing device and a fire extinguishing device, and is characterized in that the shell forms an inner cavity with closed periphery and two open opposite ends; the two release assemblies are arranged at the open ends of the shell one by one, each release assembly comprises a first protection cover and a second protection cover which are connected in a sliding mode, and a temperature sensing glass tube arranged between the first shell and the second shell, and the temperature sensing glass tube has a natural posture and a fragmentation posture; in the natural posture, the temperature sensing glass tube abuts against the first protection cover and the second protection cover, and the second protection cover seals the open end of the shell. In the fragmentation state, the second protective cover slides relative to the first protective cover and wraps the glass so as to open the open end of the shell. The cable trench fire extinguishing device solves the technical problem that a traditional cable trench fire extinguishing device is harmful to cables and the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trenches, in particular to a cable trench fire extinguishing device. Background Art

[0002] With the continuous development of my country's economy, the role of the power system in cities has become increasingly significant. Using cable trenches to lay power cables can not only improve the utilization rate of urban space, but also facilitate maintenance and repair work. Therefore, cable trenches play an important role in urban power transmission.

[0003] However, cable trenches are usually located underground, and the cable laying environment is harsh, which can easily cause short circuits due to moisture or soaking. In addition, some chemicals in the underground environment can corrode the cables, and animals chewing on the cables may also cause leakage damage. Moreover, after long-term high-temperature operation, the insulation materials of the cables may age and become damaged. Once a fire occurs, it is very likely to cause casualties and property losses. Therefore, installing an automatic fire extinguishing device in the cable trench can effectively control the initial fire in the cable trench and protect the safety of the cables. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a cable trench fire extinguishing device to solve the technical problem that the traditional cable trench fire extinguishing device in the related technology causes harm to the cables and the environment.

[0005] The utility model provides a cable trench fire extinguishing device, comprising:

[0006] The outer shell forms an inner chamber which is closed on all sides and open at two opposite ends, and is used for storing the ultrafine dry powder;

[0007] Two release assemblies are respectively arranged at each open end of the housing, each of the release assemblies comprises a first protective cover and a second protective cover which are slidably connected, and a temperature-sensitive glass tube arranged between the first housing and the second housing, the temperature-sensitive glass tube having a natural posture and a broken posture;

[0008] Wherein, in the natural posture, the temperature-sensitive glass tube abuts against the first protective cover and the second protective cover respectively, so that the first protective cover and the second protective cover are relatively stationary, and the second protective cover closes the open end of the shell;

[0009] In the broken posture, the second protective cover slides relative to the first protective cover and wraps the temperature-sensitive glass tube to open the open end of the housing.

[0010] Furthermore, the first and second protective covers are provided with a first opening and a second opening on opposite end surfaces thereof, respectively. The cross-sectional area of ​​the first opening is larger than the cross-sectional area of ​​the second opening, and is used to at least partially wrap the second protective cover.

[0011] Furthermore, a cleaning port communicating with the first opening is provided at one end of the first protective cover away from the second protective cover, and the cleaning port is detachably provided with a cap for abutting against or exposing the temperature-sensitive glass tube.

[0012] Furthermore, a plurality of guide grooves and guide rods are respectively provided on the opposite end faces of the first protective cover and the second protective cover, and the guide grooves and the guide rods are both provided along the sliding direction of the second protective cover, and one end of the guide rod slides into the guide groove, and the other end thereof is fixed to the second protective cover.

[0013] Furthermore, one end of the guide rod extending into the guide groove is connected to the guide groove via a telescopic spring, and the telescopic spring has a stretched state and a returned state.

[0014] Furthermore, the first protective cover and / or the second protective cover is provided with a plurality of filter holes; and / or

[0015] The first protective cover and / or the second protective cover is made of heat-conducting metal.

[0016] Furthermore, a conical surface is formed at one end of the second protective cover which faces away from the first protective cover, and a small-diameter end of the conical surface is detachably connected to the open end of the housing.

[0017] Furthermore, the outer shell is provided with a plurality of hoops.

[0018] Compared with the prior art, the utility model has the following beneficial effects: 1. It uses temperature-sensitive glass tube technology to sense fire, and can respond quickly when the ambient temperature reaches the operating temperature. It has the characteristics of rapid startup and reliable performance, so as to achieve the purpose of early detection and early extinguishing of fire, and effectively avoid property loss; 2. The first protective cover and the second protective cover cooperate with each other to collect the broken temperature-sensitive glass tube to prevent the scattered fragments from posing a threat to the environment or cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a cable trench fire extinguishing device in one embodiment of the utility model;

[0020] Figure 2 This is a working flow chart of the intelligent inspection system in one embodiment of the utility model.

[0021] Figure 3 It is a cross-sectional view of a release assembly in one embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. Outer shell; 101. Inner chamber; 102. Open end; 2. Temperature-sensing glass tube; 3. First protective cover; 301. First opening; 302. Cleaning port; 303. Cover cap; 4. Second protective cover; 401. Second opening; 5. Guide groove; 6. Guide rod; 7. Telescopic spring; 8. Filter hole; 9. Clamp; 10. Intelligent inspection host.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and beneficial effects of the utility model more clear, the technical solution of the utility model is further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] See also Figure 1 to Figure 2 The utility model provides a cable trench fire extinguishing device, comprising:

[0027] The housing 1 is formed with an inner chamber 101 which is closed on all sides and open at two opposite ends, and is used to store the ultrafine dry powder;

[0028] Two release assemblies are respectively arranged at the open ends 102 of the housing 1, each of the release assemblies comprises a first protective cover 3 and a second protective cover 4 which are slidably connected, and a temperature-sensitive glass tube 2 arranged between the first shell and the second shell, and the temperature-sensitive glass tube 2 has a natural posture and a broken posture;

[0029] Wherein, in the natural posture, the temperature-sensitive glass tube 2 abuts against the first protective cover 3 and the second protective cover 4 respectively, so that the first protective cover 3 and the second protective cover 4 are relatively stationary, and the second protective cover 4 closes the open end 102 of the housing 1;

[0030] In the broken posture, the second protective cover 4 slides relative to the first protective cover 3 and wraps the temperature-sensitive glass tube 2 to open the open end 102 of the housing 1 .

[0031] In the present embodiment, in order to be able to quickly extinguish the fire caused by the cable, a fire extinguishing device is installed in the cable trench, and the fire extinguishing device includes an outer shell 1, and the outer shell 1 is formed with an inner chamber 101 which is closed on all sides and open at two opposite ends. The inner chamber 101 is used to store ultrafine dry powder, which replaces the method of using chemical agents to extinguish the fire in some existing cable trench fire extinguishing devices, and will not cause corrosion to the cable and environmental damage; a release component is provided at the open end 102 of the outer shell 1, and the release component includes a first protective cover 3 and a second protective cover 4 which are slidably connected, and a temperature-sensitive glass tube 2 arranged between the first protective cover 3 and the second protective cover 4, and the temperature-sensitive glass tube 2 has a static posture and a fragmented posture. In the static posture, the two ends of the temperature-sensitive glass tube 2 are respectively abutted against the first protective cover 3 and the second protective cover 4, so that the first protective cover 3, the second protective cover 4 and the temperature-sensitive glass tube 2 remain relatively static, and at the same time, the second protective cover 4 can close the open end 102 of the outer shell 1 to avoid The ultrafine dry powder in the inner chamber 101 leaks; in the shattered posture, the sealing liquid in the temperature-sensitive glass tube 2 expands as the temperature rises, and when the corresponding action temperature is reached, the sphere will be decomposed into small fragments, and at the same time, the second protective cover 4 slides relative to the first protective cover 3, wrapping the fragments of the shattered temperature-sensitive glass tube 2 therein, and opening the open end 102 of the outer shell 1, thereby triggering the ultrafine dry powder spraying. It uses the temperature-sensitive glass tube 2 technology to sense fire, and can respond quickly when the ambient temperature reaches the action temperature. It has the characteristics of rapid startup and reliable performance, so as to achieve the purpose of early detection and early extinguishing of fire, and effectively avoid property loss. The ultrafine dry powder sprayed can quickly spread in the cable trench, and extinguish the fire source by suffocation, cooling and insulation. It will not further corrode and damage the cable like chemical agents, and the fragments decomposed by the temperature-sensitive glass ball in the shattered posture can be effectively collected and will not be scattered everywhere, thereby causing cable damage or environmental pollution.

[0032] The utility model can be combined with a cloud platform to form an intelligent fire extinguishing system. For example, a state monitoring device can be installed at the release component. The state monitoring device includes a state sensor, a control circuit board and an external power supply circuit. The state sensor detects the state information of the fire extinguishing device, such as the posture, pressure, and temperature. The control circuit board is connected to the external power supply circuit, including a main control chip, a communication module, a wake-up circuit and a signal processing circuit. The main control chip can parse the container state information collected by the state sensor. The communication module can transmit the data information parsed by the main control chip to the cloud platform. The wake-up circuit is responsible for waking up the entire circuit. The signal processing circuit can realize the communication connection between the state sensor and the control circuit board. The external power supply circuit can supply external power to the entire circuit and filter it. According to the above, the cloud platform adopts a hybrid cloud model, combining public cloud and private cloud to obtain optimal performance, security and cost-effectiveness in different scenarios. After the status sensor collects the status information of the fire extinguishing device such as posture, pressure, temperature, etc., according to the specific communication requirements of the fire extinguishing device, through the communication module on the main control chip in the status monitoring device, according to the actual environmental conditions, select the narrowband Internet of Things (NB-IoT), 4G or Zigbee and other communication methods to upload the parsed data information to the deployed public cloud or private cloud platform. The data in the public cloud deployment can be divided into stages or stored permanently. The private cloud deployment forms private data property by establishing a server locally, realizes the permanent preservation of data, and can connect data with other platforms. According to the above, the intelligent inspection host 10 is composed of a host shell, a full-color screen, an operating system based on Android5.1 and an LED indicator light. After the intelligent inspection host 10 authenticates and logs in on the cloud platform, it obtains the real-time status information of all ultra-fine dry powder automatic fire extinguishing devices, such as basic device information, network status, alarm status, spraying status, container pressure, battery information, etc., and displays it directly on the screen of the intelligent inspection host. When a fire extinguishing device fails, the intelligent inspection host 10 will issue an alarm message, the corresponding LED indicator will be lit, and the management personnel will be notified by phone and text message to perform maintenance as soon as possible. In addition, the intelligent inspection host 10 can also send monitoring reports to the management personnel's mailbox at a specified time. Figure 2The formed intelligent fire extinguishing system can transmit the data information collected by the status sensor to the cloud platform through the communication module in the status detection device. The intelligent inspection host 10 can then remotely log in to the cloud platform to monitor the on-site equipment in the cable trench in real time, which can realize remote inspection, greatly reducing the cost of previous manual inspections, and reducing the drawbacks of traditional fire data such as untimely, unreliable, and opaque. At the same time, the fire information records uploaded to the intelligent inspection host 10 can be retained, providing data support for the later evaluation of the fire environment of the cable trench. The technical contents such as sensors, main control chips, control circuits, and communication methods used in the intelligent fire extinguishing system can all be realized using existing technologies.

[0033] The first protection cover 3 and the second protection cover 4 are provided with a first opening 301 and a second opening 401 at opposite end surfaces, respectively. The cross-sectional area of ​​the first opening 301 is larger than that of the second opening 401 , and is used to at least partially wrap the second protection cover 4 .

[0034] In this embodiment, a first opening 301 and a second opening 401 are respectively provided on opposite end faces of the first protective cover 3 and the second protective cover 4. The cross-sectional area of ​​the first opening 301 is larger than the cross-sectional area of ​​the second opening 401. When the temperature-sensitive glass ball is in a broken state, the second protective cover 4 slides relative to the first protective cover 3 and is located in the first opening 301 to collect the decomposed glass fragments.

[0035] A cleaning port 302 communicating with the first opening 301 is disposed at one end of the first protective cover 3 away from the second protective cover 4 . The cleaning port 302 is detachably provided with a cap 303 for contacting or exposing the temperature-sensitive glass tube 2 .

[0036] In this embodiment, a connected cleaning port 302 is provided at the first opening 301, and a detachable cap 303 is provided at the cleaning port 302. After the cap 303 is removed, it is used to clean the glass fragments inside. At the same time, after the new glass temperature sensing tube is re-attached to the second protective cover 4 through the cleaning port 302, the cap 303 is closed to the cleaning port 302 and abuts against the temperature sensing glass tube 2 so as to put the temperature sensing glass tube 2 in a static posture again.

[0037] A plurality of guide grooves 5 and guide rods 6 are respectively arranged on the opposite end faces of the first protective cover 3 and the second protective cover 4. The guide grooves 5 and the guide rods 6 are arranged along the sliding direction of the second protective cover 4, and one end of the guide rod 6 slides into the guide groove 5, and the other end thereof is fixed to the second protective cover 4.

[0038] In this embodiment, two guide grooves 5 and guide rods 6 are respectively provided on the opposite end surfaces of the first protective cover 3 and the second protective cover 4. The guide grooves 5 and the guide rods 6 are provided along the sliding direction of the second protective cover 4, and one end of the guide rod 6 slides into the guide grooves 5. When the temperature-sensitive glass tube 2 is in a broken state, the second protective cover 4 can smoothly slide into the first opening 301 through the cooperation of the guide grooves 5 and the guide rods 6 to prevent the dispersion of glass fragments.

[0039] One end of the guide rod 6 extending into the guide groove 5 is connected to the guide groove 5 via a telescopic spring 7, and the telescopic spring 7 has a stretched state and a returned state.

[0040] In this embodiment, a telescopic spring 7 is sleeved on one end of the guide rod 6, and the other end of the telescopic spring 7 is located in the guide groove 5. When the temperature-sensitive glass tube 2 is in a static state, the telescopic spring 7 is in a stretched state, and cooperates with the temperature-sensitive glass tube 2 to respectively support the first protective cover 3 and the second protective cover 4 to close the open end 102 of the shell 1. When the temperature-sensitive glass tube 2 is in a broken state, the telescopic spring 7 is in a return state, and links the guide rod 6 to move toward the guide groove 5, so that the second protective cover 4 moves relative to the first protective cover 3 to the first opening 301; similarly, as described in the previous embodiment, when a new temperature-sensitive glass tube 2 is put in again, the telescopic spring 7 can be in a stretched state again to cooperate with the temperature-sensitive glass tube 2 to respectively support the first protective cover 3 and the second protective cover 4.

[0041] The first protective cover 3 and the second protective cover 4 are provided with a plurality of filter holes 8; the first protective cover 3 and the second protective cover 4 are made of heat-conducting metal.

[0042] In this embodiment, in order to prevent the temperature-sensitive glass tube 2 from being unable to sense the ambient temperature due to the obstruction of the first protective cover 3 and the second protective cover 4, a plurality of filter holes 8 are provided in the first protective cover 3 and the second protective cover 4, and the material of the first protective cover 3 and the second protective cover 4 is a heat-conducting metal (such as copper with good thermal conductivity), so that the temperature-sensitive glass tube 2 can sense the ambient temperature to change its own posture.

[0043] A conical surface is formed at one end of the second protective cover 4 facing away from the first protective cover 3 , and the small-diameter end of the conical surface is detachably connected to the open end 102 of the housing 1 .

[0044] In this embodiment, a conical surface is formed at one end of the second protective cover 4 away from the first protective cover 3. When the temperature-sensitive glass tube 2 is in a broken posture, the small-diameter end of the conical surface is detachably connected to the open end 102 of the outer shell 1 to guide the sprayed ultrafine dry powder and increase the spraying range.

[0045] The housing 1 is provided with a plurality of hoops 9 .

[0046] In this embodiment, a plurality of clamps 9 are provided on the housing 1 so that the housing 1 can be installed on the cable (the clamps 9 are made of 304 stainless steel), so that the housing 1 can withstand five times the mass of the fire extinguishing device without deformation or falling off.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cable trench fire extinguishing device, installed in a cable trench, characterized in that: The fire extinguishing device comprises: The outer shell forms an inner chamber which is closed on all sides and open at two opposite ends, and is used for storing the ultrafine dry powder; Two release assemblies are respectively arranged at each open end of the housing, each of the release assemblies comprises a first protective cover and a second protective cover which are slidably connected, and a temperature-sensitive glass tube arranged between the first protective cover and the second protective cover, wherein the temperature-sensitive glass tube has a static posture and a broken posture; Wherein, in the static posture, the temperature-sensitive glass tube abuts against the first protective cover and the second protective cover respectively, so that the first protective cover and the second protective cover are relatively static, and the second protective cover closes the open end of the shell; In the broken posture, the second protective cover slides relative to the first protective cover and wraps the temperature-sensitive glass tube to open the open end of the housing.

2. A cable trench fire extinguishing device as claimed in claim 1, characterized in that: The opposite end surfaces of the first protective cover and the second protective cover are respectively provided with a first opening and a second opening, and the cross-sectional area of ​​the first opening is larger than the cross-sectional area of ​​the second opening, and is used to at least partially wrap the second protective cover.

3. A cable trench fire extinguishing device as claimed in claim 2, characterized in that: A cleaning port communicating with the first opening is provided at one end of the first protective cover away from the second protective cover, and a cover cap is detachably provided on the cleaning port for contacting or exposing the temperature-sensitive glass tube.

4. A cable trench fire extinguishing device as claimed in any one of claims 1 to 3, characterized in that: A plurality of guide grooves and guide rods are respectively arranged on the opposite end faces of the first protective cover and the second protective cover. The guide grooves and the guide rods are arranged along the sliding direction of the second protective cover, and one end of the guide rod slides into the guide groove, and the other end is fixed to the second protective cover.

5. A cable trench fire extinguishing device as claimed in claim 4, characterized in that: One end of the guide rod extending into the guide groove is connected to the guide groove via a telescopic spring, and the telescopic spring has a stretched state and a returned state.

6. A cable trench fire extinguishing device as claimed in claim 1, characterized in that: The first protective cover and / or the second protective cover are provided with a plurality of filter holes; and / or The first protective cover and / or the second protective cover is made of heat-conducting metal.

7. A cable trench fire extinguishing device as claimed in claim 1, characterized in that: A conical surface is formed on one end of the second protective cover facing away from the first protective cover, and a small-diameter end of the conical surface is detachably connected to the open end of the housing.

8. A cable trench fire extinguishing device as claimed in claim 1, characterized in that: The outer shell is provided with a plurality of hoops.

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