Charging pile safety detection and alarm device
By using an interface socket, electromagnet, shape memory alloy arc rod, and temperature sensor in the charging pile detection device, the problem of the charging pile detection device being unable to disconnect in time under abnormal conditions is solved, and safe and reliable charging pile detection and alarm functions are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-04-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing charging pile detection devices cannot promptly alarm and automatically disconnect the charging gun from the interface socket when the current or voltage is abnormal, posing a safety hazard. Furthermore, failure to operate in a timely manner may lead to equipment damage and safety accidents.
A charging pile safety detection and alarm device was designed, which includes an interface socket, an electromagnet, a shape memory alloy arc rod, and a temperature sensor. When the temperature is abnormal, the arc rod deforms, causing the locking block to move and disconnect. Combined with a fan and an alarm, it can provide timely alarm and heat dissipation.
It enables timely disconnection of the charging gun from the interface socket in abnormal situations to avoid safety accidents, and ensures equipment safety through alarm and heat dissipation measures, thereby improving the safety and reliability of the testing process.
Smart Images
Figure CN121784355A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of electrical instrumentation technology, specifically a charging pile safety detection and alarm device. Background Technology
[0002] With the increasing demands for environmental protection and the development of electric vehicles, the popularity of electric vehicles is growing. Electric vehicles are clean energy sources, but their energy storage capacity cannot support long-distance travel, requiring frequent charging. Therefore, charging stations need to be installed in many places. These charging stations are similar to gas pumps at gas stations and can be fixed to the ground or walls. They can be installed in public buildings, residential parking lots, or charging stations. They can charge various models of electric vehicles according to different voltage levels. To ensure the safety of charging stations during use, they need to be inspected regularly. Meanwhile, during the testing of charging piles, current testing devices cannot promptly alarm or display alarm information when there are abnormal currents or voltages in the circuit. Furthermore, the testing device requires manual disconnection of the connection between the charging gun and the interface socket on the testing device, which can easily lead to untimely operation. For example, during the testing of high-voltage fast charging piles with an output voltage of around 1000V, untimely operation when abnormalities occur can adversely affect the performance and lifespan of the testing device, potentially causing safety accidents and increasing safety risks. Summary of the Invention
[0003] To overcome the shortcomings of existing technologies and enable timely alarms and automatic disconnection between the charging gun and the interface socket in case of abnormal situations, this invention proposes a charging pile safety detection and alarm device.
[0004] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a charging pile safety detection device, which includes a box and a box cover connected to each other. A detection device is installed inside the box. An elastic pad is installed between the detection device and the bottom surface of the box. An interface seat is provided on the detection device. An insertion slot is provided on the interface seat. The insertion slot is used to accommodate an inserted charging gun. A protective cover is installed on the interface seat. A temperature sensor is installed inside the interface seat. A locking groove is provided on the inner wall of the insertion groove, and a guide slope is provided at the lower end of the locking groove. A locking block is slidably installed in the locking groove, and a silicone layer is provided on the surface of the locking block. A fixing frame is installed on the inner wall of the detection device, an electromagnet is installed on the fixing frame, and an ejector rod is installed at the lower end of the locking block. The lower end of the ejector rod is connected to the electromagnet. The interface seat has a control groove in its side wall, and the ejector rod passes through the control groove. The ejector rod includes an upper rod, an arc rod and a lower rod connected in sequence. A push rod is installed on the lower rod, and the upper end of the push rod extends into the insertion groove. The arc-shaped rod is made of shape memory alloy, and heat pipes are installed inside the upper rod, lower rod, and top rod.
[0005] Preferably, the surface of the card block is provided with evenly distributed teeth, which contact and press against the surface of the charging gun, and the teeth protrude from the silicone layer.
[0006] Preferably, an elastic membrane is installed at the bottom of the insertion groove, the upper end of the top rod is located below the elastic membrane, and the insertion groove below the elastic membrane is isolated from the outside. The control groove is filled with insulating heat-conducting oil, which immerses the arc-shaped rod portion of the ejector rod. The space below the elastic membrane is interconnected with the control groove.
[0007] Preferably, the detection device is equipped with a mounting box located directly below the interface seat. A through hole is provided on the side wall of the mounting box, and a fan is installed at the through hole. The interface seat is provided with an air blowing hole, the lower end of which is connected to the mounting box. The outlet of the air blowing hole is inclined toward the center line of the insertion slot, and a spring is installed inside the air blowing hole. When the protective cover is closed, it seals the outlet of the air blowing hole. When the fan is working normally, the airflow speed passing through the air blowing hole does not cause the spring to vibrate.
[0008] Preferably, the protective cover is equipped with a collar, the collar being elastic, the collar being fitted onto the charging gun inserted into the insertion slot, and the protective cover tending to remain closed.
[0009] Preferably, an upper through hole is provided between the control slot and the locking slot, through which the upper rod passes; a lower through hole is provided between the control slot and the electromagnet, through which the lower rod passes; and an elastic layer is installed at the upper end of the upper through hole and the lower end of the lower through hole. The elastic layer is tightly attached to the surfaces of the upper and lower rods. The elastic layer consists of two parts, upper and lower, with a high-viscosity grease installed between the two parts.
[0010] Preferably, an indicator sheet is mounted on the surface of the interface seat, and the indicator sheet is a temperature indicator sheet whose color changes with temperature.
[0011] A charging pile safety detection alarm device is provided, the alarm device being applicable to any of the charging pile safety detection devices described above, the alarm device comprising an alarm, a temperature sensor, and a controller, wherein the controller activates the alarm when it detects an abnormality in current, voltage, or temperature; and the controller controls the fan speed to increase when it detects an abnormality in current, voltage, or temperature.
[0012] The beneficial effects of this invention are as follows: 1. The charging pile safety detection and alarm device of the present invention comprises an interface seat, an electromagnet, an upper rod, a lower rod, an arc-shaped rod, and a locking block. When the charging gun is inserted, the locking block contacts and presses the charging gun, keeping it fixed and ensuring safety during the detection process. Furthermore, when the temperature between the charging gun and the interface seat becomes abnormal, the arc-shaped rod deforms due to the increased temperature, causing the upper rod and the locking block to move upwards, releasing the charging gun from its fixation and disconnecting it from the interface seat. This allows for timely handling of abnormal situations and avoids adverse effects. Simultaneously, the coordinated action of the electromagnet and the arc-shaped rod, acting as backups for each other, ensures that the charging gun and the interface seat can be disconnected promptly in case of abnormalities, preventing safety accidents.
[0013] 2. The charging pile safety detection and alarm device of the present invention, by setting up an installation box, an air blowing hole, a reed, and an alarm, when the controller in the detection device detects an abnormal situation, it promptly issues an alarm through the alarm. At the same time, it controls the fan speed to increase, accelerates ventilation and heat dissipation, and causes the accelerated airflow to drive the reed to vibrate, causing the reed to emit an alarm sound, so as to cooperate with the alarm issued by the alarm, enabling the staff to promptly detect and handle abnormal situations, and making it easier for the staff to identify the type of abnormal situation corresponding to the alarm. Attached Figure Description
[0014] The invention will now be further described with reference to the accompanying drawings.
[0015] Figure 1 This is a perspective view of the safety detection device of the present invention; Figure 2 This is a schematic diagram of the structure of the safety detection device of the present invention; Figure 3 This is a schematic diagram of the ejector rod in the safety detection device of the present invention; Figure 4 yes Figure 2 Enlarged view of a portion of point A in the middle; Figure 5 yes Figure 4 Enlarged view of a section at point B in the middle; Figure 6 yes Figure 4 Enlarged view of a section at point C; Figure 7 yes Figure 4 Enlarged view of a section at point D; Figure 8 yes Figure 4 Enlarged view of a section at point E in the middle; In the diagram: 1. Box body; 11. Box cover; 12. Elastic pad; 2. Detection device; 3. Interface seat; 31. Protective cover; 32. Collar; 33. Insertion groove; 33. Elastic membrane; 331. Locking groove; 34. Guide slope; 341. Locking block; 342. Tooth; 343. Control groove; 35. Indicator plate; 36. Air blowing hole; 37. Spring; 371. Mounting box; 4. Fan; 41. Electromagnet; 5. Fixing bracket; 51. Lower rod; 52. Arc rod; 53. Upper rod; 54. Rubber layer; 541. Lubricating grease; 542. Top rod; 55. Detailed Implementation
[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0017] like Figures 1 to 8 As shown, the charging pile safety detection device 2 of the present invention includes a box 1 and a box cover 11 connected to each other. The detection device 2 is installed inside the box 1. An elastic pad 12 is installed between the detection device 2 and the bottom surface of the box 1. An interface seat 3 is provided on the detection device 2. An insertion slot 33 is provided on the interface seat 3. The insertion slot 33 is used to accommodate an inserted charging gun. A protective cover 31 is installed on the interface seat 3. A temperature sensor is installed inside the interface seat 3. A locking groove 34 is provided on the inner wall of the insertion groove 33. A guide slope 341 is provided at the lower end of the locking groove 34. A locking block 342 is slidably installed in the locking groove 34. A silicone layer is provided on the surface of the locking block 342. A fixing frame 51 is installed on the inner wall of the detection device 2, an electromagnet 5 is installed on the fixing frame 51, and an ejector rod is installed at the lower end of the locking block 342. The lower end of the ejector rod is connected to the electromagnet 5. The interface seat 3 has a control groove 35 in the side wall, and the ejector rod passes through the control groove 35. The ejector rod includes an upper rod 54, an arc rod 53 and a lower rod 52 connected in sequence. A push rod 55 is installed on the lower rod 52, and the upper end of the push rod 55 extends into the insertion groove 33. The arc-shaped rod 53 is made of shape memory alloy, and heat pipes are installed inside the upper rod 54, lower rod 52 and top rod 55; During testing, open the box cover 11, insert the charging gun on the charging pile into the testing device 2 inside the box 1, then select the test item and start the test through the display screen on the electrical instrument in the testing device 2, and check the test results on the display screen after the test is completed. Meanwhile, after opening the protective cover 31 on the interface seat 3, the charging gun is inserted into the insertion slot 33. After the charging gun is inserted into the insertion slot 33, the controller in the detection device 2, which controls the electrical instruments, controls the electromagnet 5 to move, causing the ejector rod to move downward. This causes the locking block 342 at the upper end of the ejector rod to move downward in the locking slot 34. Under the action of the guide slope 341 in the locking slot 34, the locking block 342 contacts and presses against the surface of the charging gun. Through the pressure and friction between the locking block 342 and the charging gun, the charging gun is locked to prevent it from loosening or falling off during the detection process, thus ensuring the safety of the detection process. Simultaneously, when abnormalities occur in current, voltage, or temperature, causing an abnormal temperature between the charging gun and the interface socket 3, the arc-shaped rod 53 inside the interface socket 3 heats up and deforms, changing from an arc shape to a straight shape. This causes the upper rod 54 to move the locking block 342 upward, releasing the locking block 342 from fixing the charging gun. At the same time, because the surface of the locking block 342 is covered with a silicone layer, when the locking block 342 moves upward, it will loosen the charging gun, disconnecting the electrical connection between the charging gun and the interface socket 3, ensuring detection safety. Simultaneously, after the temperature sensor inside the interface socket 3 detects an abnormal temperature, the controller inside the detection device 2 will control the electromagnetic... When the electromagnet 5 moves, it causes the lower rod 52 and the top rod 55 to move upward, causing the charging gun to move upward and disconnecting the connection between the charging gun and the interface seat 3. At the same time, through the action of the electromagnet 5 and the deformation of the arc rod 53, the distance of separation between the charging gun and the interface seat 3 after disconnection is ensured to be relatively far, ensuring the effectiveness of disconnection. In extreme cases, such as when the temperature sensor is damaged, the current and voltage monitoring in the detection device 2 fails, or the electromagnet 5 fails, the deformation of the arc rod 53 causes the upper rod 54 to move. Through the friction between the upper rod 54 and the charging gun, the charging gun is disconnected from the interface seat 3, ensuring detection safety in extreme cases. Meanwhile, by installing heat pipes in the upper rod 54, lower rod 52 and top rod 55, the heat in the interface seat 3 can be fully and quickly conducted to the entire ejector rod, thereby causing the arc rod 53 to deform due to temperature changes. This allows the arc rod 53 to be triggered in time when the temperature is abnormal, thus disconnecting the charging gun from the interface seat 3. This avoids the situation where the contact area between the arc rod 53 and the interface seat 3 is relatively small, preventing the timely detection of temperature changes and the activation of the action.
[0018] In one embodiment of the present invention, the surface of the card block 342 is provided with uniformly distributed teeth 343, the teeth 343 contact and press against the surface of the charging gun, and the teeth 343 protrude from the silicone layer. By using the teeth 343 on the locking block 342, when the locking block 342 contacts and presses against the surface of the charging gun, the friction between the locking block 342 and the charging gun is increased, improving the locking effect of the charging gun and preventing the charging gun from loosening or falling off during the test, which would affect the safety of the test process. At the same time, due to the cooperation between the teeth 343 and the silicone layer, the locking block 342 has a good fixing effect on the charging gun, which can fully fix and lock different models of charging guns, avoiding poor fixing and locking effect due to changes in the model of the charging gun to be tested, which would affect the safety of the test. Meanwhile, since the tooth 343 protrudes from the silicone layer and the thickness of the silicone layer is greater than the height of the tooth 343, when the tooth 343 contacts and presses against the surface of the charging gun, the silicone layer will also fully contact and press against the surface of the charging gun, further improving the locking effect on the charging gun. At the same time, when the locking block 342 moves upward, the tooth 343 will gradually release the pressure and contact on the charging gun, and the silicone layer will release the pressure and contact on the charging gun relative to the tooth 343, thereby causing the charging gun to be driven upward when the locking block 342 moves upward, thus releasing the connection between the charging gun and the interface seat 3. Meanwhile, when the locking block 342 moves upward to the upper part of the locking groove 34 and is no longer acted upon by the guide slope 341, the locking block 342 will completely retract into the locking groove 34, so that the teeth 343 and the silicone layer no longer contact the charging gun, thus preventing the removal and insertion of the charging gun from being affected and interfered with.
[0019] In one embodiment of the present invention, an elastic membrane 331 is installed at the bottom of the insertion groove 33, the upper end of the top rod 55 is located below the elastic membrane 331, and the insertion groove 33 below the elastic membrane 331 is isolated from the outside. The control groove 35 is filled with insulating heat-conducting oil, which immerses the arc-shaped rod 53 on the ejector rod. The space below the elastic membrane 331 is connected to the control groove 35. During the process of inserting the charging gun into the insertion slot 33, the end face of the charging gun will contact and press down on the elastic membrane 331, so that the space below the elastic membrane 331 gradually decreases and the insulating heat-conducting oil in the space below the elastic membrane 331 is pressed back into the control slot 35. As a result, after the charging gun is connected to the interface seat 3, there is relatively little insulating heat-conducting oil in the space below the elastic membrane 331, which does not affect the connection of the charging gun. Meanwhile, during the testing process, the insulating heat-conducting oil in the space below the elastic membrane 331 and the insulating heat-conducting oil in the control groove 35 will fully contact the interface seat 3. The insulating heat-conducting oil fills the gap between the ejector rod and the interface seat 3, and conducts the heat in the interface seat 3 to the ejector rod, so that the arc rod 53 can act in time when the temperature is abnormal, and disconnect the charging gun and the interface seat 3. Meanwhile, since the insulating heat-conducting oil fills the gap between the ejector rod and the interface seat 3, when the ejector rod moves, the insulating heat-conducting oil will lubricate the ejector rod and the interface seat 3, reduce the friction between the ejector rod and the interface seat 3, and avoid wear on the surface of the ejector rod and corrosion after damage to the surface protective layer after long-term testing, which would affect the normal operation of the ejector rod, and thus affect the use of the interface seat 3, and affect the service life and safety of the testing device 2. Meanwhile, when the charging gun is inserted into the insertion slot 33, the end face of the charging gun will squeeze the elastic membrane 331 and the top rod 55 below the elastic membrane 331, causing the top rod 55 to drive the upper rod 54, lower rod 52 and arc rod 53 to move downward, thereby causing the locking block 342 to contact and press against the surface of the charging gun.
[0020] In one embodiment of the present invention, the detection device 2 is equipped with a mounting box 4, which is located directly below the interface base 3. A through hole is provided on the side wall of the mounting box 4, and a fan 41 is installed at the through hole. The interface seat 3 is provided with an air blowing hole 37. The lower end of the air blowing hole 37 is connected to the mounting box 4. The outlet of the air blowing hole 37 is inclined towards the center line of the insertion groove 33. A spring 371 is installed in the air blowing hole 37. When the protective cover 31 is closed, it seals the outlet of the air hole 37. When the fan 41 is working normally, the airflow speed passing through the air hole 37 does not cause the spring 371 to vibrate. During testing, the fan 41 on the mounting box 4 operates, sending air into the mounting box 4 and causing the airflow to be ejected from the air blowing hole 37 on the interface socket 3 to dissipate heat inside the interface socket 3, further preventing abnormal temperature of the interface socket 3. At the same time, the airflow ejected from the air blowing hole 37 will impact the surface of the charging gun, dissipating heat on the charging gun, further preventing abnormal temperature of the charging gun and the interface socket 3, and ensuring testing safety. Meanwhile, when the charging gun or interface socket 3 experiences abnormal temperature, the controller will control the fan 41 to increase its speed, so that the fan 41 sends more air into the mounting box 4 and then exhausts it from the air vent 37, improving the heat dissipation effect on the interface socket 3. At this time, when the fan 41 drives the airflow through the air vent 37, the airflow speed will be greater than 1.5m / s, which will cause the spring 371 in the air vent 37 to vibrate and generate an alarm sound to remind the staff so that they can take timely action. This, together with the arc rod 53, disconnects the charging gun and interface socket 3 to ensure testing safety.
[0021] In one embodiment of the present invention, a collar 32 is installed on the protective cover 31. The collar 32 is elastic and is fitted onto the charging gun inserted into the insertion slot 33. The protective cover 31 tends to remain closed. When the charging gun is inserted into the interface socket 3, the charging gun is first passed through the collar 32 so that the collar 32 is fitted onto the charging gun. Then, the protective cover 31 tends to remain closed, so that the protective cover 31 will press onto the charging gun. Together with the collar 32 fitted onto the charging gun, the protective cover 31 and the collar 32 restrict and press the part of the charging gun outside the interface socket 3, ensuring that the charging gun remains stable during the test, reducing the possibility of the charging gun shaking or loosening due to the influence of the connecting cable, and further ensuring the safety of the test. Meanwhile, in case of an abnormal situation requiring disconnection of the charging gun from the interface seat 3, the elastic collar 32 allows staff to directly pull the charging gun in an emergency, causing the collar 32 to deform elastically and thus detach the charging gun from the interface seat 3, ensuring the safety of the testing process.
[0022] In one embodiment of the present invention, an upper through hole is provided between the control groove 35 and the locking groove 34, through which the upper rod 54 passes. A lower through hole is provided between the control groove 35 and the electromagnet 5, through which the lower rod 52 passes. An elastic layer is installed at the upper end of the upper through hole and the lower end of the lower through hole. The elastic layer is in close contact with the surfaces of the upper rod 54 and the lower rod 52. The elastic layer consists of two parts, upper and lower, and a high-viscosity lubricating grease 542 is installed between the two parts of the elastic layer. By installing elastic layers at the upper rod 54 and lower rod 52, the upper and lower through holes of the control groove 35 that connect to the outside are relatively sealed, preventing leakage of insulating heat-conducting oil in the control groove 35 and contamination of the interface seat 3. At the same time, high-viscosity lubricating grease 542, such as DP266-G1 wide-temperature damping grease, is filled between the upper and lower parts of the elastic layer. While ensuring smooth operation of the upper rod 54 and lower rod 52 and low friction during operation, the lubricating grease 542 is used to seal the gaps between the upper rod 54, lower rod 52 and the elastic layer, further improving the sealing performance between the control groove 35 and the outside, preventing leakage of insulating heat-conducting oil and affecting the normal use of the detection device 2.
[0023] In one embodiment of the present invention, an indicator piece 36 is mounted on the surface of the interface base 3, and the indicator piece 36 is a temperature indicator piece whose color changes with temperature. During long-term, continuous testing, when the temperature between the charging gun and the interface socket 3 is high, the color of the indicator 36 on the surface of the interface socket 3 will change with the temperature, so that the staff can intuitively observe the temperature change at the interface socket 3. At the same time, when the controller in the detection device 2 detects an abnormality in current, voltage or temperature and the controller takes timely action to disconnect the connection between the charging gun and the interface socket 3, the staff can promptly discover the interface socket 3 with abnormal temperature and deal with it, improving the efficiency of the staff in handling abnormal situations.
[0024] A charging pile safety detection alarm device is provided, which is applicable to the charging pile installation detection device 2 described in any of the above claims. The alarm device includes an alarm, a temperature sensor, and a controller. The controller activates the alarm when it detects an abnormal current, voltage, or temperature. The controller also controls the fan 41 to increase its speed when it detects an abnormal current, voltage, or temperature. During the testing process, when the controller in the testing device 2 detects an abnormality in current, voltage, or temperature, it will control the alarm to sound so that staff can promptly detect and handle the abnormality, ensuring safe testing and preventing accidents or increased safety risks. At the same time, the controller will also increase the speed of the fan 41 to accelerate the heat dissipation of the interface socket 3. During the heat dissipation process, the rapidly flowing air will cause the reed 371 to vibrate, further emitting an alarm sound, thus making it easier for staff to identify the cause of the abnormal alarm.
[0025] The specific workflow is as follows: During testing, open the box cover 11, insert the charging gun on the charging pile into the testing device 2 inside the box 1, then select the test item and start the test through the display screen on the electrical instrument in the testing device 2, and check the test results on the display screen after the test is completed. At the same time, after opening the protective cover 31 on the interface seat 3, the charging gun is inserted into the insertion slot 33. After the charging gun is inserted into the insertion slot 33, the controller in the detection device 2, which controls the electrical instruments, controls the electromagnet 5 to move, causing the ejector rod to move downward. This causes the locking block 342 at the upper end of the ejector rod to move downward in the locking slot 34. Under the action of the guide slope 341 in the locking slot 34, the locking block 342 contacts and presses against the surface of the charging gun, thus locking the charging gun. Simultaneously, when abnormalities occur in current, voltage, or temperature, causing an abnormal temperature between the charging gun and the interface socket 3, the arc-shaped rod 53 inside the interface socket 3 heats up and deforms, changing from an arc shape to a straight shape. This causes the upper rod 54 to move the locking block 342 upward, releasing the locking block 342 from fixing the charging gun. At the same time, because the surface of the locking block 342 is covered with a silicone layer, the upward movement of the locking block 342 loosens the charging gun, disconnecting the electrical connection between the charging gun and the interface socket 3. Simultaneously, after the temperature sensor inside the interface socket 3 detects an abnormal temperature, the controller inside the detection device 2 will control... When the electromagnet 5 is activated, it causes the lower rod 52 and the top rod 55 to move upward, thus moving the charging gun upward and disconnecting the connection between the charging gun and the interface seat 3. At the same time, through the action of the electromagnet 5 and the deformation of the arc rod 53, the distance between the charging gun and the interface seat 3 after disconnection is ensured to be relatively far, thus ensuring the disconnection effect. In extreme cases, such as when the temperature sensor is damaged, the current and voltage monitoring in the detection device 2 fails, or the electromagnet 5 fails, the deformation of the arc rod 53 causes the upper rod 54 to move. Through the friction between the upper rod 54 and the charging gun, the charging gun is disconnected from the interface seat 3. Meanwhile, by installing heat pipes in the upper rod 54, lower rod 52 and top rod 55, the heat in the interface seat 3 can be fully and quickly conducted to the entire ejector rod, thereby causing the temperature of the arc rod 53 to change and deform, triggering the arc rod 53 to move in time, and causing the charging gun and interface seat 3 to disconnect. By using the teeth 343 provided on the locking block 342, when the locking block 342 contacts and presses against the surface of the charging gun, the friction between the locking block 342 and the charging gun is fully increased, thereby improving the locking effect on the charging gun. At the same time, due to the cooperation between the teeth 343 and the silicone layer, the locking block 342 has a good fixing effect on the charging gun, thus enabling it to fully fix and lock different models of charging guns. Meanwhile, since the tooth 343 protrudes from the silicone layer and the thickness of the silicone layer is greater than the height of the tooth 343, when the tooth 343 contacts and presses against the surface of the charging gun, the silicone layer will also fully contact and press against the surface of the charging gun. At the same time, when the latch 342 moves upward, the tooth 343 will gradually release the pressure and contact on the charging gun, and the silicone layer will release the pressure and contact on the charging gun relative to the tooth 343, causing the charging gun to be driven upward when the latch 342 moves upward, thus disconnecting the connection between the charging gun and the interface socket 3. At the same time, when the card block 342 moves upward to the upper part of the locking groove 34 and the card block 342 is no longer acted upon by the guide slope 341, the card block 342 will completely retract into the locking groove 34, so that the teeth 343 and the silicone layer no longer contact the charging gun. During the process of inserting the charging gun into the insertion slot 33, the end face of the charging gun will contact and press down on the elastic membrane 331, so that the space below the elastic membrane 331 gradually decreases and the insulating heat-conducting oil in the space below the elastic membrane 331 is pressed back into the control slot 35. As a result, after the charging gun is connected to the interface seat 3, there is relatively little insulating heat-conducting oil in the space below the elastic membrane 331, which does not affect the connection of the charging gun. Meanwhile, during the testing process, the insulating heat-conducting oil in the space below the elastic membrane 331 and the insulating heat-conducting oil in the control groove 35 will fully contact the interface seat 3. The insulating heat-conducting oil fills the gap between the ejector rod and the interface seat 3, and conducts the heat in the interface seat 3 to the ejector rod, so that the arc rod 53 can act in time when the temperature is abnormal. Meanwhile, since the insulating heat-conducting oil will fill the gap between the ejector rod and the interface seat 3, the insulating heat-conducting oil will lubricate the ejector rod and the interface seat 3 when the ejector rod moves. At the same time, when the charging gun is inserted into the insertion slot 33, the end face of the charging gun will squeeze the elastic membrane 331 and the push rod 55 below the elastic membrane 331, so that the push rod 55 drives the upper rod 54, the lower rod 52 and the arc rod 53 to move downward, thereby causing the locking block 342 to contact and press against the surface of the charging gun. During testing, the fan 41 on the mounting box 4 operates, sending air into the mounting box 4, causing the airflow to be ejected from the air blowing hole 37 on the interface socket 3, dissipating the heat inside the interface socket 3. At the same time, the airflow ejected from the air blowing hole 37 will impact the surface of the charging gun, dissipating the heat on the charging gun. Meanwhile, when the charging gun or interface socket 3 experiences abnormal temperature, the controller will control the fan 41 to increase its speed, so that the fan 41 sends more air into the mounting box 4 and then exhausts it from the air vent 37, thereby improving the heat dissipation effect on the interface socket 3. At this time, when the fan 41 drives the airflow through the air vent 37, the airflow speed will be greater than 1.5m / s, which will cause the spring 371 in the air vent 37 to vibrate and generate an alarm sound. When the charging gun is inserted into the interface socket 3, the charging gun is first passed through the collar 32 so that the collar 32 is fitted onto the charging gun. Then, the protective cover 31 tends to remain closed, so that the protective cover 31 will press onto the charging gun. Together with the collar 32 fitted onto the charging gun, the protective cover 31 and the collar 32 restrict and press the part of the charging gun outside the interface socket 3, ensuring that the charging gun remains stable during the testing process. Meanwhile, in case of an abnormal situation and it is necessary to disconnect the charging gun from the interface seat 3, the collar 32 is elastic, so the staff can directly pull the charging gun in an emergency, causing the collar 32 to deform elastically, thereby causing the charging gun to detach from the interface seat 3. By installing elastic layers at the upper rod 54 and lower rod 52, the upper and lower through holes of the control groove 35 that connect with the outside are relatively sealed, preventing the leakage of insulating heat-conducting oil in the control groove 35 and contamination of the interface seat 3. At the same time, high-viscosity lubricating grease 542, such as DP266-G1 wide-temperature damping grease, is filled between the upper and lower parts of the elastic layer. While ensuring smooth operation of the upper rod 54 and lower rod 52 and low friction during operation, the lubricating grease 542 is used to seal the gaps between the upper rod 54, lower rod 52 and the elastic layer, further improving the sealing performance between the control groove 35 and the outside. During long-term, continuous testing, when the temperature between the charging gun and the interface socket 3 is high, the color of the indicator 36 on the surface of the interface socket 3 will change with the temperature, so that the staff can intuitively observe the temperature change at the interface socket 3. At the same time, when the controller in the detection device 2 detects an abnormality in current, voltage or temperature and the controller takes timely action to disconnect the connection between the charging gun and the interface socket 3, the staff can promptly find the interface socket 3 with abnormal temperature and deal with it. During the testing process, when the controller in the testing device 2 detects an abnormality in current, voltage, or temperature, it will control the alarm to sound so that staff can promptly detect and handle the abnormality, ensuring safe testing and preventing accidents or increased safety risks. At the same time, the controller will also increase the speed of the fan 41 to accelerate the heat dissipation of the interface socket 3. During the heat dissipation process, the rapidly flowing air will cause the reed 371 to vibrate, further emitting an alarm sound, thus making it easier for staff to identify the cause of the abnormal alarm.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A charging pile safety detection device, comprising a box (1) and a box cover (11) connected to each other, wherein a detection device (2) is installed inside the box (1), an elastic pad (12) is installed between the detection device (2) and the bottom surface of the box (1), an interface seat (3) is provided on the detection device (2), an insertion slot (33) is provided on the interface seat (3), the insertion slot (33) is used to accommodate an inserted charging gun, a protective cover (31) is installed on the interface seat (3), and a temperature sensor is installed inside the interface seat (3); Its features are: The inner wall of the insertion groove (33) is provided with a locking groove (34), the lower end of the locking groove (34) is provided with a guide slope (341), a locking block (342) is slidably installed in the locking groove (34), and a silicone layer is provided on the surface of the locking block (342). A fixing frame (51) is installed on the inner wall of the detection device (2), an electromagnet (5) is installed on the fixing frame (51), and an ejector rod is installed at the lower end of the locking block (342), with the lower end of the ejector rod connected to the electromagnet (5). The interface seat (3) has a control groove (35) in the side wall. The ejector rod passes through the control groove (35). The ejector rod includes an upper rod (54), an arc rod (53), and a lower rod (52) connected in sequence. A push rod (55) is installed on the lower rod (52). The upper end of the push rod (55) extends into the insertion groove (33). The arc-shaped rod (53) is made of shape memory alloy, and heat pipes are installed inside the upper rod (54), lower rod (52) and top rod (55).
2. The charging pile safety detection device according to claim 1, characterized in that: The surface of the card block (342) is provided with evenly distributed teeth (343), which contact and press against the surface of the charging gun, and the teeth (343) protrude from the silicone layer.
3. The charging pile safety detection device according to claim 1, characterized in that: An elastic membrane (331) is installed at the bottom of the insertion groove (33), and the upper end of the top rod (55) is located below the elastic membrane (331). The insertion groove (33) below the elastic membrane (331) is isolated from the outside. The control groove (35) is filled with insulating heat-conducting oil, which immerses the arc-shaped rod (53) on the ejector rod. The space below the elastic membrane (331) is connected to the control groove (35).
4. The charging pile safety detection device according to claim 1, characterized in that: The detection device (2) is equipped with an installation box (4), which is located directly below the interface seat (3). A through hole is provided on the side wall of the installation box (4), and a fan (41) is installed in the through hole. The interface seat (3) is provided with an air blowing hole (37), the lower end of the air blowing hole (37) is connected to the mounting box (4), the outlet of the air blowing hole (37) is inclined towards the center line of the insertion groove (33), and a spring (371) is installed in the air blowing hole (37). When the protective cover (31) is closed, it seals the outlet of the air blowing hole (37). When the fan (41) is working normally, the airflow speed passing through the air blowing hole (37) will not cause the reed (371) to vibrate.
5. The charging pile safety detection device according to claim 1, characterized in that: A collar (32) is installed on the protective cover (31). The collar (32) is elastic and is fitted onto the charging gun inserted into the insertion slot (33). The protective cover (31) tends to remain closed.
6. The charging pile safety detection device according to claim 1, characterized in that: An upper through hole is provided between the control groove (35) and the locking groove (34), and the upper rod (54) passes through the upper through hole. A lower through hole is provided between the control groove (35) and the electromagnet (5), and the lower rod (52) passes through the lower through hole. An elastic layer is installed at the upper end of the upper through hole and the lower end of the lower through hole. The elastic layer is in close contact with the surfaces of the upper rod (54) and the lower rod (52). The elastic layer consists of two parts, upper and lower, and a high-viscosity grease (542) is installed between the two parts of the elastic layer.
7. The charging pile safety detection device according to claim 1, characterized in that: An indicator piece (36) is mounted on the surface of the interface base (3), and the indicator piece (36) is a temperature indicator piece whose color changes with temperature.
8. A safety detection and alarm device for charging piles, characterized in that: The alarm device is applicable to a charging pile safety detection device (2) according to any one of claims 1-7. The alarm device includes an alarm, a temperature sensor and a controller. The controller activates the alarm when it detects an abnormal current, voltage or temperature. The controller controls the fan (41) to increase its speed when it detects an abnormal current, voltage or temperature.