Cable trench ventilation and dehumidification device

Abstract

The utility model relates to a ventilation and dehumidification device for a cable trench. The ventilation and dehumidification device comprises a ventilation barrel and a barrel cap connected with one end of the ventilation barrel through a fixing support. The other end of the ventilator is arranged above the hollow part of the hollow well lid; the barrel cap is used for preventing rainwater and sundries from entering the ventilating barrel; when in use, the hollow well cover is covered on a cable trench. The cable trench ventilation and dehumidification device provided by the utility model replaces a traditional in-station cable trench well lid, solves the problems that in the prior art, a cable trench in a transformer substation is moist, cable insulation is endangered, and the service life of a cable and the reliability of power supply are affected, and has a certain prevention and control effect on fire safety in the cable trench. And meanwhile, the device is low in cost, remarkable in effect, high in feasibility, easy to popularize and good in universality when the cable trench manhole cover in an existing transformer substation is modified.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trench operation and maintenance, in particular to a cable trench ventilation and dehumidification device. Background Art

[0002] In the power system, cables, as the core carrier of power transmission, play a vital role in the stability and safety of power supply. However, in municipal renovation projects, for the sake of aesthetics and closure, the cover of the cable trench is often sealed, making the cable trench an underground closed space. This closed environment easily leads to increased humidity, moisture accumulation in the trench, and even condensation, which poses a serious threat to the insulation performance of the cable. At the same time, if the complex gas composition in the cable trench cannot be discharged in time, long-term accumulation will cause damage to the cable, affect its service life, and may even cause major safety accidents such as fire.

[0003] In addition, the traditional design of cable trench covers in substations is obviously insufficient in solving the moisture problem, resulting in a continuous damp environment in the cable trench. This not only threatens the insulation performance of the cable and shortens its service life, but also seriously affects the reliability of power supply. At the same time, this humid environment may also bring fire safety hazards and pose a potential threat to the normal operation of the substation and the safety of personnel.

[0004] Considering the harsh environment in the cable trench, once a cable fault occurs, it is not only difficult to detect in time, but the repair work is also complicated and time-consuming, which will lead to long power outages and have a serious impact on the power supply. Therefore, how to effectively improve the environmental conditions in the cable trench to improve the operating safety of the cable has become an important issue that needs to be solved in the power industry. Utility Model Content

[0005] The utility model aims to provide a cable trench ventilation and dehumidification device to replace traditional municipal engineering and substation cable trench covers, aiming to solve the problem that the cable trenches in existing municipal engineering and substations are in a humid environment for a long time, which easily leads to a decrease in cable insulation performance, thereby affecting the service life of the cables and the reliability of power supply.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cable trench ventilation and dehumidification device comprises: a ventilator and a tube cap connected to one end of the ventilator via a fixed bracket; the other end of the ventilator is arranged above the hollow part of a hollow manhole cover; the tube cap is used to prevent rainwater and debris from entering the ventilator; when in use, the hollow manhole cover is covered on the cable trench.

[0008] In some embodiments, the ventilation tube is a cylindrical body, and a controller is arranged on the outside of the cylindrical body; a manhole cover bracket is arranged in the hollow part of the hollow manhole cover, and a fan is arranged on the manhole cover bracket; the controller is electrically connected to the fan.

[0009] In some embodiments, the barrel cap is a bottomless cone covered with a solar panel, which is used to power the controller and the fan.

[0010] In some embodiments, a temperature and humidity sensor is also included. The humidity sensor is fixed to one side of the lower surface of the hollow manhole cover and is electrically connected to the controller through a wire.

[0011] In some embodiments, a smoke alarm is also included, which is fixed to the lower surface of the hollow manhole cover and is used to detect the smoke concentration in the cable trench.

[0012] In some embodiments, a warning sign is also included, and the warning sign is attached to the outside of the ventilator.

[0013] In some embodiments, the hollow manhole cover is an inverted hollow circular altar, the side portion of which includes a truncated cone-shaped side, and the ventilation tube is a hollow cylindrical tube, the radius of which is the same as the inner radius of the upper surface of the hollow manhole cover.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] The utility model provides a cable trench ventilation and dehumidification device, which replaces traditional cable trench covers in substations, solves the problems in the prior art that the cable trench in substations is damp, endangers cable insulation, affects the service life of cables and power supply reliability, and has a certain prevention and control effect on fire safety in cable trenches. At the same time, the device has low cost, significant effect, high feasibility, is easy to promote for the renovation of cable trench covers in existing substations, and has good popularity.

[0016] The cylindrical ventilator design facilitates the smooth passage of air. The controller is located outside the ventilator for easy operation and maintenance. At the same time, the switch of the fan can adjust the ventilation conditions in the cable trench as needed.

[0017] Solar panels are used to power the controller and fan, making the device green and self-sufficient, reducing dependence on external power supplies and lowering operating costs.

[0018] The temperature and humidity sensor can monitor the temperature and humidity information in the cable trench in real time and transmit this information to the controller, thereby realizing accurate monitoring and timely adjustment of the cable trench environment.

[0019] The addition of a smoke alarm improves the safety of the device. Once smoke or fire appears in the cable trench, the alarm will immediately send out an alarm signal and notify the controller so that timely countermeasures can be taken.

[0020] Putting warning signs on the outside of the ventilator can remind people to pay attention to safety and avoid accidentally touching or damaging the device, thereby enhancing the safety of the device.

[0021] The hollow manhole cover adopts the shape of an inverted hollow circular altar. This design significantly improves the stability of the entire device, so that the ventilation tube set on the hollow manhole cover is not easy to deviate when subjected to external force, thereby ensuring that the hollow cylindrical tube set on the hollow circular altar can firmly maintain its position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the cable channel ventilation and dehumidification device of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model cable channel ventilation and dehumidification device, which is equipped with a controller, a fan, a temperature and humidity sensor and other components;

[0024] Figure 3 It is a structural schematic diagram of a hollow manhole cover of a cable channel ventilation and dehumidification device of the utility model at one angle;

[0025] Figure 4 This is a structural schematic diagram of another angle of the hollow manhole cover of the cable channel ventilation and dehumidification device of the utility model;

[0026] Figure 5 This is a schematic diagram of the parameter setting method of the controller of the utility model;

[0027] In the figure, 1. tube cap, 2. fixing bracket, 3. ventilation tube, 4. rain cover, 5. controller, 6. hollow manhole cover, 601. truncated cone side, 7. temperature and humidity sensor, 8. wire, 9. fan, 10. smoke alarm, 11. manhole cover bracket, 12. warning sign, 13. solar panel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The present application is further described in detail below with reference to the accompanying drawings:

[0032] Example 1

[0033] like Figure 1 As shown, the utility model provides a cable channel ventilation and dehumidification device, comprising: a ventilation tube 3, and a tube cap 1 connected to one end of the ventilation tube 3 through a fixed bracket 2; the other end of the ventilation tube 3 is arranged above the hollow part of the hollow manhole cover 6; the tube cap 1 is used to prevent rainwater and debris from entering the ventilation tube.

[0034] Specifically, the fixing bracket 4 can be 4 steel bars, one end of which is evenly welded to the inner surface of the tube cap 1, and the other end of which is evenly welded to the outer edge of the ventilating tube 3. The length of the steel bar can be 15 cm. The ventilating tube 3 can be a hollow cylindrical tube.

[0035] like Figure 3 and Figure 4 As shown, the hollow manhole cover 6 is designed to be in the shape of an inverted hollow circular altar, and its characteristic is that the side portion contains a truncated cone-shaped side 601. In order to ensure the smooth connection of the structure, the inner radius of the upper surface of the hollow manhole cover 6 can be consistent with the radius of the ventilation tube 3. Therefore, after welding the edge of the other port of the ventilation tube 3 and the edge of the hollow part of the upper surface of the hollow manhole cover 6, a smooth transition between the inner circle of the hollow cylindrical tube and the inner circle of the hollow altar can be easily achieved. This design not only improves the aesthetics of the device, but also optimizes the passage efficiency of the airflow.

[0036] Due to the unique design of the hollow manhole cover 6, the center of gravity of the hollow manhole cover 6 is effectively lowered, thereby greatly improving the stability of the entire cable trench ventilation and dehumidification device. The low center of gravity design makes the hollow manhole cover 6 less likely to be affected by external factors (such as wind, vibration, etc.), thereby ensuring that the ventilation tube 3 arranged above the hollow part of the hollow manhole cover 6 can firmly maintain its position and is not easily offset by external forces. In addition, the contact area between the truncated cone side surface 601 and the cable trench wellhead is large, which further enhances the sealing performance of the hollow manhole cover 6.

[0037] Example 2

[0038] like Figure 2 As shown, the utility model provides another cable channel ventilation and dehumidification device, including a ventilation tube 3, a tube cap 1 and a fixed bracket 4. The tube cap 1 is tightly connected to one end of the ventilation tube 3 through the fixed bracket 4, effectively preventing rainwater and debris from invading the ventilation tube. The other end of the ventilation tube 3 is arranged above the hollow part of the hollow manhole cover 6. The specific arrangement method can be that the ventilation tube 3 is welded above the hollow part of the hollow manhole cover 6 or the ventilation tube 3 is bolted above the hollow part of the hollow manhole cover 6. The fixed bracket 4 can also be a rectangular frame welded by steel bars.

[0039] In addition, the hollow manhole cover 6 is designed to be an inverted hollow circular altar shape, and the inner radius of its upper and lower surfaces is the same as that of the ventilation duct 3, both of which are 20 cm, the outer radius of the upper surface is 42 cm, the outer radius of the lower surface is 40 cm, and the height is 2 cm.

[0040] Furthermore, a controller 5 may be fixed to the outside of the ventilation tube 3. The hollow part of the hollow manhole cover 6 is provided with a manhole cover bracket 11, which may be a steel frame welded in the central hollow part of the hollow manhole cover 6, and the fan 9 is mounted on the steel frame. Specifically, the controller 5 may be a device with an integrated power switch function, which directly controls the power on and off of the fan by controlling the state of the power switch, thereby realizing the opening and closing operation of the fan.

[0041] Specifically, a rain cover 4 is provided on the outer side of the ventilation tube 3 above the controller 5. The rain cover 4 is mainly used to prevent the controller 5 from getting damp, being polluted, etc.

[0042] Furthermore, the ventilation tube 3 is a cylindrical body with a radius of 20 cm and a height of 75 cm. The radius and height are selected mainly to prevent foreign objects and small animals from falling into the wellhead, while ensuring sufficient opening area for air circulation.

[0043] Furthermore, the tube cap 1 is a bottomless cone, which is covered with a solar panel, and the solar panel is used to supply power to the controller 5 and the fan 9.

[0044] The cone shape helps to maximize the collection of solar energy at different angles and lighting conditions. Because the efficiency of solar panels depends on the amount of light they receive, this design can increase the effective area of ​​solar panels receiving light at different time periods, especially in the morning and evening when the sun angle is low, thereby improving the efficiency of generating electricity. At the same time, the solar panels are integrated on the cap, making full use of the vertical space without occupying additional ground area, which is particularly beneficial for urban environments with limited space or scenes where ground obstacles need to be avoided.

[0045] Furthermore, it also includes a temperature and humidity sensor 7, which is fixed on the lower surface of the hollow manhole cover and electrically connected to the controller through a wire. The humidity sensor 7 is used to detect the temperature and humidity information in the cable trench and transmit it to the controller. Specifically, the controller of this embodiment may include a power supply and a temperature and humidity controller of model KZ-1KT (RS3).

[0046] Furthermore, it also includes a smoke alarm 10, which is fixed to the lower surface of the hollow manhole cover. The smoke alarm 10 is used to send an alarm signal when smoke appears in the cable trench. The smoke alarm 10 can send an alarm signal to the staff remotely alone, or send an alarm signal in conjunction with the controller. The model of the smoke alarm 10 can be JTY-GM-FL251.

[0047] Furthermore, it also includes a warning sign 12, which is attached to the outside of the ventilator 2.

[0048] It should be noted that the controller 5 of the present invention can be adjusted according to the number or models of connected devices such as temperature and humidity sensors 7, fans or smoke alarms 10, and the model of the controller is not fixed.

[0049] like Figure 4 As shown, during the use of this type of controller, the controller parameters can be set first, and the humidity and temperature parameter thresholds can be set. Then choose whether to start, select "no" to exit, and select "yes" to enter the self-test mode to determine whether the device has any faults. If there is a fault, the fault light will be on, and if there is no fault, it will enter the working mode, that is, the temperature and humidity sensor detects the temperature and humidity information in the cable channel and transmits it to the controller for analysis and processing. When the temperature and humidity in the cable channel reach or exceed the preset threshold, the relay contacts in the controller are closed, the exhaust fan is powered on and starts working, and the fan light is on; when the temperature or humidity in the cable channel does not reach the set threshold, the relay contacts in the controller are disconnected and the exhaust fan is not started.

[0050] The smoke alarm detects smoke on site. When the smoke concentration reaches the response threshold, the alarm is triggered and a reminder is sent through the platform in a timely manner. After receiving SMS and phone reminders, users can respond immediately. The platform will also send the alarm information to the fire department simultaneously, greatly shortening the fire rescue response time. At the same time, when a fire occurs in the cable trench, the temperature in the trench rises. When the temperature reaches the set threshold, the exhaust fan starts to prevent the accident from developing further.

[0051] The working principle of this utility model:

[0052] The solar panel 13 of the utility model is covered on the barrel cap 1, which can collect solar energy and convert it into electrical energy to provide power for the controller 5 and the fan 9. The temperature and humidity sensor 7 is fixed on the lower surface of the hollow manhole cover 6, which can monitor the temperature and humidity information in the cable trench in real time and transmit this information to the controller 5. When the humidity exceeds the set threshold, the controller 5 will start the fan 9 to extract the moisture in the cable trench through the ventilator 3, thereby reducing the humidity and preventing the cable from being damaged due to moisture.

[0053] In addition, the cable trench ventilation and dehumidification device also includes a smoke alarm 10, which is fixed on the lower surface of the hollow manhole cover and can detect the smoke concentration in the cable trench. Once an abnormality is detected, the smoke alarm will sound an alarm and can be linked with the controller to take corresponding emergency measures.

[0054] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cable channel ventilation and dehumidification device, characterized in that: include: A ventilator, and a tube cap connected to one end of the ventilator through a fixed bracket; the other end of the ventilator is arranged above the hollow part of the hollow manhole cover; the tube cap is used to prevent rainwater and debris from entering the ventilator; when in use, the hollow manhole cover of the cable ditch ventilation and dehumidification device is covered on the cable trench.

2. The cable channel dehumidification device according to claim 1, characterized in that: A controller is arranged on the outside of the ventilation duct; a manhole cover bracket is arranged at the hollow part of the hollow manhole cover, and a fan is arranged on the manhole cover bracket; and the controller is electrically connected to the fan.

3. The cable channel dehumidification device according to claim 2, characterized in that: The barrel cap is a bottomless cone, which is covered with a solar panel, and the solar panel is used to supply power to the controller and the fan.

4. The cable channel dehumidification device according to claim 2, characterized in that: It also includes a temperature and humidity sensor, which is fixed on the lower surface of the hollow manhole cover and is electrically connected to the controller through a wire.

5. The cable channel dehumidification device according to claim 2, characterized in that: It also includes a smoke alarm, which is fixed to the lower surface of the hollow manhole cover and is used to detect the smoke concentration in the cable trench.

6. The cable channel dehumidification device according to claim 1, characterized in that: Also included is a warning sign, which is attached to the outside of the ventilator.

7. The cable channel dehumidification device according to claim 1, characterized in that: The hollow manhole cover is an inverted hollow circular altar, and its side part includes a truncated cone-shaped side surface. The ventilation tube is a hollow cylindrical tube, and its radius is the same as the inner radius of the upper surface of the hollow manhole cover.

Images