Power grid overload and short circuit early warning device suitable for complex environment

Abstract

The invention discloses a power grid overload and short circuit early warning device suitable for a complex environment, and the device comprises a power grid installation cover, a sealing cover, and a high-temperature early warning mechanism, an anti-interference mechanism and a sealing assembly which are all disposed on the power grid installation cover and are distributed inside and outside, and one side of the outer wall of the power grid installation cover is provided with an alarm. A heat-conducting elbow is mounted in the middle of the top of the wire tube, a temperature sensor is mounted in the middle of one side of the inner wall of the heat-conducting elbow, and one side of the temperature sensor penetrates through the outer wall of one side of the heat-conducting elbow to be connected with a wire; the power grid mounting cover is matched with the sealing cover to wrap the outer side of the power grid wire, the detected area of the power grid wire is peeled to be placed in the wire tube, once overload or short circuit occurs, the temperature of the line rises, the temperature of the detected area also rises, and generated high-temperature heat cannot be diffused in the narrow wire tube, so that the power grid wire is protected from being damaged. The temperature sensor can only enter the heat conduction bent pipe through the first through hole to be detected, and the sensitivity of the early warning device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid protection, and in particular to a power grid overload and short circuit early warning device suitable for complex environments. Background Art

[0002] A circuit overload occurs when the actual power or current in a circuit exceeds its designed capacity, while a short circuit occurs when an abnormally low-resistance path causes a sharp increase in current. Both can cause abnormal line temperature rises, potentially damaging equipment or even fires. Traditional early warning systems typically detect overload and short circuits based on cable temperature monitoring, triggering alarms based on the heating effect of conductors.

[0003] However, in the use of modern power grids, due to the complex environment in which the grid is used, there are the following disadvantages in the process of overload and short circuit warning of the grid circuit:

[0004] 1. In an open environment, the temperature rise caused by cable overheating easily forms heat exchange with the outside air. Especially in large-space heat dissipation or forced convection scenarios, temperature sensors are difficult to capture the actual heat generated by the conductor. The reduced accuracy of temperature detection will lead to delayed warning of circuit overload and short circuit, resulting in long-term load on the power grid, causing equipment damage and increasing cost losses.

[0005] 2. Existing devices use an external sensor layout, with a direct heat conduction path between the housing and the cable. When the ambient temperature rises suddenly, such as in high summer temperatures or when equipment is stacked in a closed cabinet, the sensor will simultaneously detect the superimposed signals of conductor heating and ambient parasitic temperature rise, resulting in an increased false trigger rate and reduced accuracy of the warning device.

[0006] 3. The non-enclosed installation structure of existing mainstream early warning devices allows external airflow to invade the detection area, forming a dynamic thermal interference source. In particular, when the power grid line is inserted into the interior of the early warning device, its two ends do not have a good sealing effect, allowing the external temperature to directly enter the power grid line detection area, thereby affecting the temperature detection value. Summary of the Invention

[0007] The purpose of the present invention is to provide a power grid overload and short circuit warning device suitable for complex environments, so as to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention proposes a power grid overload and short circuit warning device suitable for complex environments, comprising a power grid installation cover, a sealing cover, and a high-temperature warning mechanism, an anti-interference mechanism, and a sealing assembly, all of which are installed on the power grid installation cover and distributed inside and outside.

[0009] The high temperature warning mechanism includes a wire tube installed on one side of the inner wall of the power grid installation cover, an alarm is installed on one side of the outer wall of the power grid installation cover, a heat-conducting bent pipe is installed in the middle position of the top of the wire tube, and first through holes are opened at both ends of one side of the wire tube, and the inner walls of one end of the two first through holes are respectively connected to the inner walls of the two ends of the heat-conducting bent pipe, a temperature sensor is installed in the middle position of one side of the inner wall of the heat-conducting bent pipe, one side of the temperature sensor is connected to a wire through the outer wall of one side of the heat-conducting bent pipe, and the wire is fixedly connected to one end of the alarm, and the alarm is electrically connected to the temperature sensor through the wire, a vacuum groove is opened at the edge of the inner wall of the wire tube, and the inner wall of the vacuum groove is filled with thermal insulation cotton.

[0010] In one example, a threaded ring is fixedly provided at the edge of one end of the sealing cover, a threaded groove is provided at the edge of one side of the inner wall of the power grid installation cover, and the threaded ring is threadedly connected to the threaded groove, a limiting cylinder is fixedly provided on one side of the inner wall of the sealing cover, and the outer wall of one end of the wire tube is interlaced with the inner wall of the limiting cylinder, and a through groove is provided on one side of the inner wall of the sealing cover.

[0011] In one example, the anti-interference mechanism includes a mounting sleeve fixedly mounted on one end of the outer wall of the power grid mounting cover, a guide groove is provided on the inner wall of the mounting sleeve, a mounting groove is provided on one side of the bottom of the mounting sleeve, and a heat dissipation fan is installed on the inner wall of the mounting groove.

[0012] In one example, a plurality of air outlet holes are opened at equal distances on one side of the outer wall of the mounting sleeve, a plurality of second through holes are opened at equal distances in the middle position of the inner wall of the mounting sleeve, and a plurality of third through holes are opened at equal distances on the outer wall of the power grid mounting cover on the inner side of the mounting sleeve, and the inner wall of each second through hole is respectively connected to the inner wall of each third through hole.

[0013] In one example, a connecting groove is fixedly provided on one side of the outer wall of the sealing cover, and a plurality of ventilation grooves are opened at equal distances at the bottom of the connecting groove, and the inner wall of each ventilation groove passes through the inner wall of the connecting groove and the inner wall of the sealing cover to communicate with the inner wall of the through groove, and a dustproof net is installed at the edge of the bottom of the inner wall of the installation groove.

[0014] In one example, a mounting base is fixedly provided on the top of the mounting sleeve, a solar panel is installed on the top of the mounting base, and the solar panel is installed on the top of the mounting base in an inclined state.

[0015] In one example, the sealing assembly includes a connecting ring installed at one end of the grid installation cover and one end of the sealing cover, and the inner walls of one end of the two connecting rings are respectively connected to the inner wall of the grid installation cover and the interior of the sealing cover, and the inner walls of the two connecting rings are both installed with rubber airbags.

[0016] In one example, an air intake pipe is inserted and connected to one side of the two connecting rings, an air nozzle is fixedly provided at one end of the two air intake pipes, and a protective sleeve is threadedly connected to the outer wall of the two air nozzles.

[0017] In one example, a battery is installed on the inner wall of the mounting sleeve, and the solar panel supplies power to the battery, and the cooling fan is electrically connected to the battery.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting up a high-temperature early warning mechanism, the power grid installation cover and the sealing cover are wrapped around the outside of the power grid line, and the detected area of the power grid line is stripped and placed in a wire tube. Once an overload or short circuit occurs, the line temperature rises, and the temperature of the detected area also rises. The high temperature heat generated cannot diffuse in the narrow wire tube and can only enter the thermal bending pipe through the first through hole and be detected by the temperature sensor, thereby triggering the alarm. The staff can take protective measures in the first time, thereby improving the sensitivity of the early warning device, reducing the probability of equipment damage, and thus reducing loss costs;

[0020] 2. By setting up an anti-interference mechanism, when the early warning device is placed outdoors or in a cabinet device with a higher temperature, the external temperature is high, which will cause the temperature of the outer wall of the device to rise. At this time, the heat dissipation fan in the installation slot is started to introduce air into the guide slot, where it flows and enters the interior of the power grid installation cover from the second through hole and the second through hole, and squeezes out the high-temperature air from the air outlet slot, so as to exchange the air flow inside and outside, and quickly reduce the temperature inside. In addition, part of the air flow is blown to the outer wall of the device through the air outlet, reducing the temperature of the outer wall of the device, thereby reducing the outer wall temperature introduced into the interior to affect the internal detection, thereby improving the detection accuracy of the early warning device, making the early warning device suitable for load and short circuit early warning of power grid mirrors in various complex environments;

[0021] 3. By setting up a sealing component, when installing the power grid line through the early warning device, unscrew the protective cover of the power grid installation cover and the connecting ring end of one end of the sealing cover, use an external air pumping device to inflate the air nozzle, and then blow it to the rubber airbag through the air inlet pipe to make it expand until the outer walls of both ends of the power grid line are fully squeezed to achieve sealing, thereby reducing the external temperature from entering through the connection gap to affect the monitoring value of the internal temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0023] Figure 2 This is a schematic diagram of the structure inside the power grid installation cover of the present invention;

[0024] Figure 3This is a schematic diagram of the structure inside the sealing cover of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure inside the electric wire tube of the present invention;

[0026] Figure 5 This is a schematic structural diagram of the power grid installation cover and the bottom of the sealing cover of the present invention;

[0027] Figure 6 This is a structural diagram of the bottom of the ferrule installed in the present invention;

[0028] Figure 7 This is a schematic diagram of the structure inside the connecting ring of the present invention;

[0029] Figure 8 This invention is attached to the specification Figure 7 Schematic diagram of the structure enlarged at point A.

[0030] In the figure: 1. Power grid installation cover; 2. Sealing cover; 3. High temperature warning mechanism; 301. Electric wire pipe; 302. Alarm; 303. Thermal bending pipe; 304. First through hole; 305. Temperature sensor; 306. Wire; 307. Vacuum groove; 308. Insulation cotton; 4. Threaded ring; 5. Limit cylinder; 6. Through groove; 7. Anti-interference mechanism; 701. Mounting sleeve; 702. Guide groove; 703. Mounting groove; 704. Cooling fan; 705. Air outlet; 706. Second through hole; 707. Third through hole; 708. Connecting groove; 709. Ventilation groove; 710. Dustproof net; 8. Mounting base; 9. Solar panel; 10. Sealing assembly; 1001. Connecting ring; 1002. Rubber airbag; 1003. Inlet pipe; 1004. Air nozzle; 1005. Protective cover. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-8 The present invention provides a technical solution: a power grid overload and short circuit warning device suitable for complex environments, comprising a power grid installation cover 1, a sealing cover 2, and a high temperature warning mechanism 3, an anti-interference mechanism 7, and a sealing assembly 10, all of which are installed on the power grid installation cover 1 and distributed inside and outside.

[0033] The high temperature warning mechanism 3 includes a wire tube 301 installed on one side of the inner wall of the power grid installation cover 1, an alarm 302 is installed on one side of the outer wall of the power grid installation cover 1, a heat conduction elbow 303 is installed in the middle position of the top of the wire tube 301, and first through holes 304 are opened at both ends of one side of the wire tube 301, and the inner walls of one end of the two first through holes 304 are respectively connected to the inner walls of the two ends of the heat conduction elbow 303, a temperature sensor 305 is installed in the middle position of one side of the inner wall of the heat conduction elbow 303, one side of the temperature sensor 305 passes through the outer wall of one side of the heat conduction elbow 303 and is connected to a wire 306, and the wire 306 is fixedly connected to one end of the alarm 302, and the alarm 302 is electrically connected to the temperature sensor 305 through the wire 306, a vacuum groove 307 is opened at the edge of the inner wall of the wire tube 301, and the inner wall of the vacuum groove 307 is filled with thermal insulation cotton 308;

[0034] When in use, the grid installation cover 1 and the sealing cover 2 are wrapped around the outside of the grid line. When detecting the temperature of the grid line, the outer protective rubber sleeve of the wrapped area needs to be removed, and the bare wire is placed in the wire tube 301 inside the grid installation cover 1, so that the temperature of the grid line can be more intuitively and directly presented in the wire tube 301. When the grid line is overloaded or short-circuited, the temperature at the upper end of the line will rise sharply, and the temperature of the bare wire area of the grid will also rise. At this time, the bare wire is placed in the narrow space of the wire tube 301, and the temperature emitted from it will gather in the wire tube 301 and be transferred to the heat-conducting bend 303 through the first through hole 304. It will continue to gather in the heat-conducting bend 303, so that the temperature therein quickly reaches the temperature sensor. 305, the temperature sensor 305 will send an alarm command to the alarm 302 through the wire 306, thereby causing the alarm 302 to sound an alarm, and the staff can take protective measures in the first time. During use, this design shrinks the temperature detection area of the power line to only the range of the internal size of the wire tube 301. At the same time, a vacuum groove 307 is opened in the inner wall of the wire tube 301, which is filled with thermal insulation cotton 308 to reduce internal temperature loss. At the same time, it can also effectively reduce the external temperature from entering the wire tube 301 and affecting the sensing effect of the temperature sensor 305, thereby reducing the high rapid loss caused by overload and short circuit of the power line, reducing the sluggishness of the early warning device to circuit early warning, and improving the sensitivity of the early warning device;

[0035] Further, as the instructions Figure 3As shown, a threaded ring 4 is fixedly provided at the edge of one end of the sealing cover 2, a threaded groove is provided at the edge of one side of the inner wall of the power grid installation cover 1, and the threaded ring 4 is threadedly connected to the threaded groove, a limiting cylinder 5 is fixedly provided on one side of the inner wall of the sealing cover 2, and the outer wall of one end of the wire tube 301 is connected with the inner wall of the limiting cylinder 5 through an interlaced connection, and a through groove 6 is provided on one side of the inner wall of the sealing cover 2. When installing the power grid line, it is passed through the wire tube 301 and connected to the sealing cover 2 at one end of the power grid installation cover 1, and is threadedly connected to the threaded groove on one side of the inner wall of the power grid installation cover 1 through the threaded ring 4 at one end of the sealing cover 2, and a sealing flange is provided on one side of the power grid installation cover 1 and the sealing cover 2. After the two are in contact, the sealing flanges can be in contact and squeezed to achieve sealing of the connection area to prevent rainwater from seeping into it when used in an external environment;

[0036] Further, as the instructions Figure 5-6 As shown, the anti-interference mechanism 7 includes a mounting sleeve 701 fixedly mounted on one end of the outer wall of the power grid mounting cover 1, the inner wall of the mounting sleeve 701 is provided with a guide groove 702, and a mounting groove 703 is provided on one side of the bottom of the mounting sleeve 701. A heat dissipation fan 704 is installed on the inner wall of the mounting groove 703, and the mounting groove 703 is placed on one side of the mounting sleeve 701. When the early warning device is installed on the power grid line, the mounting groove 703 needs to be kept vertically downward at all times to avoid the device being placed in the outside world on rainy days, causing rainwater to enter it and affect the performance of the device.

[0037] A plurality of air outlet holes 705 are provided at equal distances on one side of the outer wall of the mounting sleeve 701, a plurality of second through holes 706 are provided at equal distances in the middle position of the inner wall of the mounting sleeve 701, a plurality of third through holes 707 are provided at equal distances on the outer wall of the power grid mounting cover 1 located on the inner side of the mounting sleeve 701, and the inner wall of each second through hole 706 is connected to the inner wall of each third through hole 707 respectively. When the early warning device is used and the sensing effect of the internal temperature sensor 305 is affected by the high temperature outside, the cooling fan 704 in the mounting slot 703 is started to introduce airflow into the guide slot 702 inside the mounting sleeve 701, and the airflow is in the guide slot 702. Flow, and then enter the interior of the power grid installation cover 1 through the second through hole 706 and the third through hole 707, and exchange the high-temperature gas inside with the external airflow through the ventilation slot 709 at the bottom of the connecting slot 708, so that the temperature of the power grid line in the wire tube 301 can always be kept from being affected by the external temperature, so that the temperature sensed by the temperature sensor 305 is always kept at the temperature emitted from the power grid line, and the airflow introduced by the heat dissipation fan 704 is evenly blown onto the outer wall of the early warning device through the air outlet 705, thereby reducing the temperature on the outer wall of the device, thereby reducing the outer wall temperature from being introduced into the interior to affect the internal detection, and improving the detection accuracy of the early warning device;

[0038] Further, as the instructions Figure 5As shown, a connection groove 708 is fixedly provided on one side of the outer wall of the sealing cover 2, and a plurality of ventilation grooves 709 are opened at equal intervals at the bottom of the connection groove 708. The inner wall of each ventilation groove 709 passes through the inner wall of the connection groove 708 and the inner wall of the sealing cover 2 and communicates with the inner wall of the through groove 6. A dustproof net 710 is installed at the edge of the bottom of the inner wall of the installation groove 703. When the sealing cover 2 is screwed on the power grid installation cover 1, the connection groove 708 is always kept facing downward to prevent rainwater and dust from entering the interior of the equipment.

[0039] Furthermore, a mounting base 8 is fixed on the top of the mounting sleeve 701, and a solar panel 9 is installed on the top of the mounting base 8, and the solar panel 9 is installed on the top of the mounting base 8 in an inclined state. When the early warning device is installed on the outdoor power grid, the mounting base 8 on the mounting sleeve 701 is always vertically upward, and the solar panel 9 at its upper end absorbs light energy and converts it into electrical energy to drive the cooling fan 704 to operate, as shown in the attached manual. Figure 1 As shown, if the device is installed indoors, it can be electrically connected to an external power supply through the circuit jack at the lower left corner of the mounting sleeve 701 to power the cooling fan 704;

[0040] Further, as the instructions Figure 7-8 As shown, the sealing assembly 10 includes a connecting ring 1001 installed at one end of the power grid installation cover 1 and one end of the sealing cover 2, and the inner walls of one end of the two connecting rings 1001 are respectively connected to the inner wall of the power grid installation cover 1 and the interior of the sealing cover 2, and the inner walls of the two connecting rings 1001 are both installed with rubber airbags 1002, and the rubber airbags 1002 in the connecting rings 1001 are supported by rubber materials with high toughness. Even if the equipment is placed outdoors for a long time, the rubber airbags 1002 are not easily damaged or leaked when expanded.

[0041] One side of the two connecting rings 1001 is connected with an air intake pipe 1003, and one end of the two air intake pipes 1003 is fixed with an air nozzle 1004. The outer walls of the two air nozzles 1004 are threaded with a protective sleeve 1005. After the power grid line passes through the wire tube 301, its outer wall is respectively inserted into the connecting ring 1001 at one end of the power grid installation cover 1 and one end of the sealing cover 2, and the power grid line inside the two connecting rings 1001 is not peeled. Unscrew the protective sleeve 1005, use an air pump to align the air nozzle 1004 and blow air through the air intake pipe 1003, thereby expanding the rubber airbag 1002 inside the connecting ring 1001 until the expanded rubber airbag 1002 is squeezed on the outer wall of the power grid line, so that the two ends of the power grid line are wrapped by the rubber airbag 1002, so that the two ends of the early warning device remain sealed, reducing the external temperature from entering through the connection gap to affect the monitoring value of the internal temperature sensor 305.

[0042] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the relevant parts, please refer to the partial description of the method embodiment.

[0043] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A power grid overload and short circuit warning device suitable for complex environments, comprising a power grid installation cover (1), a sealing cover (2), and a high temperature warning mechanism (3), an anti-interference mechanism (7), and a sealing assembly (10) all mounted on the power grid installation cover (1) and arranged inside and outside. Its characteristics are: The high temperature warning mechanism (3) comprises a wire tube (301) installed on one side of the inner wall of the power grid installation cover (1), an alarm (302) is installed on one side of the outer wall of the power grid installation cover (1), a heat conduction bend (303) is installed at the middle position of the top of the wire tube (301), first through holes (304) are opened at both ends of one side of the wire tube (301), and the inner walls of one end of the two first through holes (304) are respectively connected to the inner walls of the two ends of the heat conduction bend (303), and the inner wall of the heat conduction bend (303) is connected to the inner wall of ... A temperature sensor (305) is installed in the middle of one side, one side of the temperature sensor (305) passes through the outer wall of one side of the heat-conducting elbow (303) and is connected to a wire (306), and the wire (306) is fixedly connected to one end of the alarm (302), and the alarm (302) is electrically connected to the temperature sensor (305) through the wire (306), and a vacuum groove (307) is opened at the edge of the inner wall of the wire tube (301), and the inner wall of the vacuum groove (307) is filled with thermal insulation cotton (308).

2. The power grid overload and short circuit warning device suitable for complex environments according to claim 1, characterized in that: A threaded ring (4) is fixedly provided at the edge of one end of the sealing cover (2), a threaded groove is provided at the edge of one side of the inner wall of the power grid installation cover (1), and the threaded ring (4) is threadedly connected to the threaded groove, a limiting cylinder (5) is fixedly provided at one side of the inner wall of the sealing cover (2), and the outer wall of one end of the electric wire tube (301) is connected to the inner wall of the limiting cylinder (5) through-connected, and a through groove (6) is provided at one side of the inner wall of the sealing cover (2).

3. The power grid overload and short circuit warning device suitable for complex environments according to claim 1, characterized in that: The anti-interference mechanism (7) comprises a mounting sleeve (701) fixedly mounted on one end of the outer wall of the power grid mounting cover (1); a guide groove (702) is provided on the inner wall of the mounting sleeve (701); a mounting groove (703) is provided on one side of the bottom of the mounting sleeve (701); and a heat dissipation fan (704) is mounted on the inner wall of the mounting groove (703).

4. The power grid overload and short circuit warning device suitable for complex environments according to claim 3, characterized in that: A plurality of air outlet holes (705) are equidistantly provided on one side of the outer wall of the mounting sleeve (701), a plurality of second through holes (706) are equidistantly provided in the middle of the inner wall of the mounting sleeve (701), and a plurality of third through holes (707) are equidistantly provided on the outer wall of the power grid mounting cover (1) located on the inner side of the mounting sleeve (701), and the inner wall of each second through hole (706) is respectively connected to the inner wall of each third through hole (707).

5. The power grid overload and short circuit warning device suitable for complex environments according to claim 1, characterized in that: A connecting groove (708) is fixedly provided on one side of the outer wall of the sealing cover (2), and a plurality of ventilation grooves (709) are equidistantly provided at the bottom of the connecting groove (708), and the inner wall of each ventilation groove (709) passes through the inner wall of the connecting groove (708) and the inner wall of the sealing cover (2) and is in communication with the inner wall of the through groove (6), and a dustproof net (710) is installed at the edge of the bottom of the inner wall of the installation groove (703).

6. The power grid overload and short circuit warning device suitable for complex environments according to claim 1, characterized in that: A mounting base (8) is fixedly provided on the top of the mounting sleeve (701), a solar panel (9) is installed on the top of the mounting base (8), and the solar panel (9) is installed on the top of the mounting base (8) in an inclined state.

7. The power grid overload and short circuit warning device suitable for complex environments according to claim 1, characterized in that: The sealing assembly (10) comprises a connecting ring (1001) mounted on one end of the power grid installation cover (1) and one end of the sealing cover (2), wherein the inner walls of one end of the two connecting rings (1001) are respectively connected to the inner wall of the power grid installation cover (1) and the interior of the sealing cover (2), and the inner walls of the two connecting rings (1001) are both mounted with rubber airbags (1002).

8. The power grid overload and short circuit warning device suitable for complex environments according to claim 7, characterized in that: An air intake pipe (1003) is inserted and connected to one side of the two connecting rings (1001), an air nozzle (1004) is fixedly provided at one end of the two air intake pipes (1003), and a protective sleeve (1005) is threadedly connected to the outer wall of the two air nozzles (1004).

9. The power grid overload and short circuit warning device suitable for complex environments according to claim 6, characterized in that: A battery is installed on the inner wall of the mounting sleeve (701), and the solar panel (9) supplies power to the battery. The heat dissipation fan (704) is electrically connected to the battery.

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