Voltage detection equipment for power supply

Abstract

The invention relates to the technical field of power grid voltage detection equipment main bodies, and discloses voltage detection equipment for power supply, which comprises a voltage detection device body, two groups of equipment sockets are electrically connected to the voltage detection device body, plugs are electrically connected to the interiors of the equipment sockets, the plugs are externally wrapped by insulating sleeves, and the insulating sleeves are electrically connected to the interiors of the equipment sockets. A mounting groove is formed in the end, close to the equipment socket, of the insulating sleeve, a spring is arranged in the mounting groove, the spring is fixed to the insulating sleeve, and bimetallic strips are installed on the two sides of the interior of the groove; a groove is formed in the insulating sleeve, and the cross section of the groove is T-shaped; through the arrangement of the elastic sheet, the bayonet lock, the spring and the bimetallic strip, the equipment socket and the plug are discontinuously and rapidly electrically connected at the moment of overvoltage, continuous overvoltage of voltage detection equipment is avoided, continuous high temperature of the contact part of the plug and the equipment socket is prevented, oxidation, fusion welding and even ablation of a contact point are avoided, and the detection precision and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the main body of grid voltage detection equipment, and particularly relates to a voltage detection equipment for power supply. Background Art

[0002] In the power system, the power grid undertakes the important tasks of power transmission and distribution. With the continuous growth of electricity demand, the grid load is constantly climbing. Especially during peak electricity consumption periods or extreme weather conditions, the grid voltage may fluctuate significantly. If the voltage rises abnormally, it will not only affect the normal operation of electrical equipment but also may cause potential safety hazards. Therefore, it is crucial to detect the grid voltage in real time and accurately.

[0003] Chinese Patent CN201822094297.9 discloses a low voltage detection device for a new type of distribution network, including a detection box body. There are four groups of USB interfaces arranged on the outer surface of the detection box body. One end of the detection box body is connected to a box door through a hinge. A lock block is arranged on the front surface of the box door. Inside the box door, a detection box and a sound box are respectively installed, and the detection box is located on one side of the sound box. The box door is connected to a lock groove arranged on the front surface of the detection box body through the lock block. A placement groove is arranged inside the detection box body, and a detection electric pen is arranged inside the placement groove. A storage battery is arranged inside the detection box body, and a wiring terminal is arranged at one end of the storage battery. The wiring terminal is connected to the detection electric pen through a wire. A lighting lamp is installed inside the detection box body, and the lighting lamp is located on one side of the storage battery. This utility model solves the problems of the single function and inconvenient carrying of the low voltage detection device for the distribution network.

[0004] However, it lacks a warning and protection device. At the connection between the traditional voltage detection device body and the plug, when the grid voltage rises sharply due to a fault or instantaneous overload, the detection device may be damaged due to exceeding its rated tolerance range. Especially at the moment of overvoltage, the contact part between the plug and the equipment socket generates local high temperature due to the large current passing through, resulting in oxidation, welding, or even ablation of the contact point, which not only affects the detection accuracy but also may cause equipment failures or fire risks.

[0005] Therefore, it is necessary to provide a voltage detection equipment for power supply to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a voltage detection equipment for power supply to solve the problems in the prior art described in the above background art, such as at the moment of overvoltage, the contact part between the plug and the equipment socket generates local high temperature due to the large current passing through, resulting in oxidation, welding, or even ablation of the contact point, which not only affects the detection accuracy but also may cause equipment failures or fire risks.

[0007] Based on the above ideas, the present invention provides the following technical solutions: It includes a voltage detection device body, on which two groups of device sockets are electrically connected. Inside the device socket, there is an electrical connection with a plug. The outside of the plug is wrapped with an insulating sleeve. One end of the insulating sleeve close to the device socket is provided with an installation groove, and a spring is arranged inside the installation groove, and the spring is fixed to the insulating sleeve; a groove is opened inside the insulating sleeve, the cross-sectional shape of the groove is T-shaped, and bimetallic sheets are installed on both sides inside the groove. Two symmetrically arranged elastic sheets are also installed on the groove. The elastic sheets penetrate through the insulating layer and extend to the outside. One end of the elastic sheet is fixedly connected with a latch, and two latch holes are opened at the top of the device socket, and the latch is adapted to the latch holes; a limiting rod is installed at the top of the voltage detection device body, and a support plate is fixedly connected to the outside of the insulating sleeve. The support plate is sleeved outside the limiting rod and is slidably matched with it.

[0008] As a further scheme of the present invention: A round rod is rotatably connected to the top of the voltage detection device body. A spiral groove is opened on the outer side of the top of the round rod. A round hole is opened on one side of the support plate, and a slider is installed at the position of the round hole. One end of the slider is located in the spiral groove and is slidably matched with it; an energy storage component is arranged at the bottom of the round rod.

[0009] As a further scheme of the present invention: The energy storage component includes a sleeve, the sleeve is fixedly connected to the top of the voltage detection body, the sleeve is sleeved outside the round rod, and the round rod and the sleeve are connected by a clockwork spring.

[0010] As a further scheme of the present invention: A driving component is arranged between the round rods. The driving component includes a transmission guide rod, the transmission guide rod is fixedly connected to the middle of the round rod, and the cross-sectional shape of the transmission guide rod is U-shaped; A convex block is rotatably connected to the outside of the transmission guide rod; A suction component is arranged on one side of the convex block.

[0011] As a further scheme of the present invention: The suction component includes a piston rod, one end of the piston rod is hinged to the convex block, the other end of the piston rod is hinged to a piston, the outside of the piston is provided with a piston cylinder, one end of the piston cylinder extends into the device socket, and the piston is hermetically slidable with the piston cylinder; One end of the piston cylinder is communicated with an air outlet pipe, and the outside of the piston cylinder is communicated with an air inlet pipe, and one-way valves are installed on the outside of the air outlet pipe and the air inlet pipe.

[0012] As a further scheme of the present invention: An air duct cavity is arranged inside the device socket, the air duct cavity is communicated with the air outlet pipe, and the cross-sectional shape of the air duct cavity is annular; Multiple air holes are opened on one side close to the inner circle of the air duct cavity, the air holes are communicated with the air duct cavity, and the multiple air holes are annularly distributed.

[0013] As a further solution of the present invention: the air holes are arranged obliquely, and the end of the air hole close to the airway cavity is higher than the end far from the airway cavity.

[0014] As a further solution of the present invention: heat dissipation fins are annularly distributed on the outer ring of the device socket.

[0015] Compared with the prior art, the beneficial effects of the present invention are that through the settings of the elastic piece, the pin, the spring and the bimetallic piece, at the moment of overvoltage, the device socket and the plug are quickly disconnected from the electrical connection, avoiding continuous overvoltage of the voltage detection device, preventing continuous high temperature at the contact part between the plug and the device socket, avoiding oxidation, welding or even ablation of the contact point, and improving the detection accuracy and safety.

[0016] Compared with the prior art, the beneficial effects of the present invention are that through the settings of the energy storage component and the suction component, after the voltage detection device is overvoltage and the device socket and the plug are disconnected from the electrical connection, the suction component is used to quickly cool the device socket and the plug, avoiding damage to the device socket and the plug caused by high temperature, and further improving the detection accuracy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the drawings and embodiments.

[0018] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the cross-sectional view schematic diagram of the voltage detection device of the present invention; Figure 3 is the structural schematic diagram of the device socket of the present invention; Figure 4 is the spring structural schematic diagram of the present invention; Figure 5 is the cross-sectional view structural schematic diagram of the plug of the present invention; Figure 6 is the present invention Figure 5 magnified structural schematic diagram at A; Figure 7 is the present invention Figure 5 magnified structural schematic diagram at B; Figure 8 is the present invention Figure 5 magnified structural schematic diagram at C; Figure 9 is the sleeve structural schematic diagram of the present invention.

[0019] In the figure: 1. Equipment socket; 101. Plug hole; 2. Plug; 201. Groove; 3. Elastic piece; 4. Pin; 5. Spring; 6. Bimetallic strip; 7. Limit rod; 8. Round rod; 801. Spiral groove; 9. Mainspring; 10. Sleeve; 11. Transmission guide rod; 12. Bump; 13. Piston rod; 14. Piston; 15. Piston cylinder; 16. Air passage cavity; 17. Air hole; 18. Check valve; 19. Slide block. Detailed implementation mode

[0020] As Figures 1 to 6 , Figure 8 shown, a voltage detection device for power supply includes a voltage detection device body. Two groups of equipment sockets 1 are electrically connected to the voltage detection device body. A plug 2 is electrically connected inside the equipment socket 1. An insulating sleeve is wrapped outside the plug 2. An installation groove is opened at one end of the insulating sleeve close to the equipment socket 1. A spring 5 is arranged inside the installation groove, and the spring 5 is fixed to the insulating sleeve; a groove 201 is opened inside the insulating sleeve. The cross-sectional shape of the groove 201 is T-shaped. Two bimetallic strips 6 are installed on both sides inside the groove 201. Two groups of symmetrically arranged elastic pieces 3 are also installed on the groove 201. The elastic pieces 3 penetrate through the insulating layer and extend to the outside. One end of the elastic piece 3 is fixedly connected with a pin 4. Two plug holes 101 are opened at the top of the equipment socket 1. The pin 4 is adapted to the plug hole 101; a limit rod 7 is installed at the top of the voltage detection device body. A support plate is fixedly connected to the outside of the insulating sleeve. The support plate is sleeved outside the limit rod 7 and is slidably matched with it.

[0021] In this embodiment, before detecting the voltage, the plug 2 is inserted into the equipment socket 1 so that the equipment socket 1 and the plug 2 are electrically connected. During the movement of the plug 2, due to the limitation of the limit rod 7, the plug 2 can only move vertically back and forth; The downward movement of the plug 2 drives the two elastic pieces 3 to move synchronously. The movement of the elastic pieces 3 drives the pins 4 to move synchronously. The pins 4 are subjected to the extrusion force of the side walls of the plug holes 101, driving the two elastic pieces 3 to deform in the direction of approaching each other until the pins 4 are stuck into the plug holes 101. It should be noted here that when the plug 2 moves downward and is electrically connected to the equipment socket 1, the spring 5 is in a compressed state, and the cross-sectional shape of the plug hole 101 is L-shaped. The pins 4 are stuck into the plug holes 101, locking the spring 5 in a compressed state; Next, connect the other end of the plug 2 to the power grid for voltage detection. Once the voltage in the power grid exceeds the load pressure of the voltage detection device, the connection between the device socket 1 and the plug 2 will instantly become locally high-temperature. The bimetal 6 deforms, and the two groups of bimetals 6 deform towards each other, squeezing the two groups of elastic pieces 3 to move towards each other. The movement of the elastic piece 3 drives the movement of the latch 4. At this time, the spring 5 loses its locking function, and the plug 2 can move upward under the action of the spring 5, so that the electrical connection between the device socket 1 and the plug 2 is disconnected. It should be noted here that the active layer of the bimetal 6 is made of brass, and the passive layer is made of invar alloy. When the temperature reaches 50 degrees, the bimetal 6 deforms. In order to reduce the deformation time of the bimetal 6, the thickness of the bimetal 6 is set to be relatively thin. At the same time, the installation position of one side of the bimetal 6 is infinitely close to the battery cell in the socket 2. Therefore, when the device socket 1 and the socket 2 are overloaded and heated, the temperature change can be sensed immediately, further reducing the deformation time of the bimetal 6; At the same time, through holes are opened on both sides of the insulating layer of the plug 2 close to the bimetal 6. The through holes are connected to the grooves 201, which is convenient for the bimetal 6 to be quickly ventilated and cooled and reset after being heated and deformed. A dust-blocking net is installed at the outlet of the through hole by bolts to block dust. At the same time, if the plug 2 needs to be replaced when it is damaged, the dust-blocking net can be disassembled at this time. By pressing the symmetric elastic pieces 3 on both sides, the connection between the device socket 1 and the plug 2 is released. At the same time, the interference fit is between the limiting rod 7 and the circular convex block provided at the top of the round rod 8 and the limiting rod 7 and the round rod 8 respectively. When the device plug 1 and the socket 2 are separated, it plays a role in limiting the socket 2 to prevent the socket 2 from detaching from the limiting rod 7. When the plug 2 needs to be disassembled, the two circular convex blocks are respectively pulled out from the limiting rod 7 and the round rod 8, which is convenient for disassembling the socket 2; At the moment of overvoltage, quickly disconnect the electrical connection between the device socket 1 and the plug 2, avoid continuous overvoltage of the voltage detection device, prevent the contact part between the plug and the device socket from being continuously high-temperature, avoid oxidation, soldering or even ablation of the contact point, and improve the detection accuracy and safety.

[0022] Such as Figure 5 As shown, a round rod 8 is rotatably connected to the top of the voltage detection device body. A spiral groove 801 is opened on the outer side of the top of the round rod 8. A circular hole is opened on one side of the support plate, and a slider 19 is installed at the position of the circular hole. One end of the slider 19 is located in the spiral groove 801 and is slidably matched with it; a energy storage component is arranged at the bottom of the round rod 8.

[0023] In this embodiment, the round rod 8 is located in the circular hole. When manually pressing the plug 2 to move, the movement of the plug 2 drives the support plate to move synchronously. The downward movement of the support plate drives the slider 19 to slide inside the spiral groove 801, driving the round rod 8 to rotate. The process of the round rod 8 rotating is the process of the energy storage component storing energy.

[0024] Such as Figure 5As shown, the energy storage component includes a sleeve 10. The sleeve 10 is fixedly connected to the top of the voltage detection body. The sleeve 10 is sleeved outside the round rod 8, and the round rod 8 is connected to the sleeve 10 through a clockwork spring 9.

[0025] In this embodiment, when the round rod 8 rotates against the acting force of the clockwork spring 9 so that the device socket 1 is electrically connected to the plug 2, the round rod 8 is simultaneously locked. It should be noted here that through the additional clockwork spring 9, when the device socket 1 is disconnected from the plug 2, sufficient driving force is provided to the round rod 8 to prevent the slider 19 from getting stuck when sliding upward in the spiral groove 801.

[0026] As Figure 5 、 Figure 9 As shown, a driving component is arranged between the round rods 8. The driving component includes a transmission guide rod 11. The transmission guide rod 11 is fixedly connected to the middle of the round rod 8, and the cross-sectional shape of the transmission guide rod 11 is set to be U-shaped; a convex block 12 is rotatably connected to the outside of the transmission guide rod 11; a suction component is arranged on one side of the convex block 12.

[0027] In this embodiment, when the round rod 8 rotates, it drives the transmission guide rod 11 to rotate. When the U-shaped transmission guide rod 11 rotates, combined with the setting of the convex block 12, the suction component can reciprocally inhale and exhale.

[0028] As Figures 8 to 9 As shown, the suction component includes a piston rod 13. One end of the piston rod 13 is hinged to the convex block 12, and the other end of the piston rod 13 is hinged to a piston 14. A piston cylinder 15 is arranged outside the piston 14. One end of the piston cylinder 15 extends into the device socket 1, and the piston 14 is in sealed sliding connection with the piston cylinder 15; an air outlet pipe is connected to one end of the piston cylinder 15, and an air inlet pipe is connected to the outside of the piston cylinder 15. Check valves 18 are installed on the outside of both the air outlet pipe and the air inlet pipe.

[0029] In this embodiment, when the transmission guide rod 11 rotates, through the settings of the convex block 12 and the piston rod 13, the piston 14 can be driven to reciprocally move inside the piston cylinder 15. Each rotation drives the piston 14 to reciprocally move once to complete one inhalation and exhalation action. The air flow enters the piston cylinder 15 through the air inlet pipe and then is discharged through the air outlet pipe. The setting of the check valve 18 enables the air flow to only flow in one direction; It should be noted here that the diameter of the piston cylinder 15 is much larger than the rotation diameter of the transmission guide rod 11. Therefore, when the transmission guide rod 11 rotates to drive the piston rod 13 to move, the side wall of the piston cylinder 15 will not obstruct the movement of the piston rod 13, ensuring that the piston rod 13 can operate normally.

[0030] As Figures 8 to 9As shown, an air passage cavity 16 is provided inside the device socket 1. The air passage cavity 16 is communicated with the air outlet pipe, and the cross-sectional shape of the air passage cavity 16 is set as an annular shape; a plurality of groups of air holes 17 are opened on one side close to the inner ring of the air passage cavity 16. The air holes 17 are communicated with the air passage cavity 16, and the plurality of groups of air holes 17 are distributed in an annular shape.

[0031] In this embodiment, the air flow in the piston cylinder 15 is discharged into the interior of the air passage cavity 16 through the air outlet pipe, and the discharged cooling air flow then flows into the interior of the air holes 17 communicated with it through the air passage cavity 16. Since the air holes 17 are inclined, and one end of the air hole 17 close to the air passage cavity 16 is higher than the end far from the air passage cavity 16, the cooling air flow can be blown into the interior of the device socket 1 through the air holes 17. A heat dissipation fin is annularly distributed on the outer circle of the device socket 1 to improve the heat dissipation effect of the device socket 1; At the same time, the annularly distributed air holes 17 can blow air uniformly in the circumferential direction to the device socket 1 and the plug 2, improving the heat dissipation effect; It is worth noting here that the cross-sectional shape of the top opening of the device socket 1 is set as a frustum shape, with the upper diameter larger than the lower diameter, and the outlet end of the air hole 17 is arranged at the upper part of the frustum shape, facilitating the smooth discharge of the heat dissipation air flow.

[0032] Working principle: When the plug 2 is disconnected from the device socket 1, the upward movement of the plug 2 drives the slider 19 to slide inside the spiral groove 801, which can drive the round rod 8 to rotate reversely. Combined with the cooperation of the clockwork spring 9, further kinetic energy is given to the round rod 8 to avoid the slider 19 getting stuck inside the spiral groove 801 during the upward movement of the plug 2. The round rod 8 rotates reversely for multiple turns to perform the air intake and blowing actions. When the plug 2 moves upward, the cooling air flow is blown through the air holes 17 to cool the plug 2. When the plug 2 is completely disconnected from the device socket 1, at this time, the cooling air flow continues to be discharged for 3 seconds and then stops. Within these 3 seconds, the air flow continuously blows into the interior of the device socket 1, which can further cool the interior of the device socket 1; After the temperature reduction is completed, press the plug 2 to be electrically connected to the device socket 1 again. During the connection process of the plug 2 and the device socket 1, the spring 5 is compressed again.

[0033] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A voltage detection device for power supply, characterized in that: It includes a voltage detection device body, on which two groups of device sockets (1) are electrically connected. Inside the device socket (1), there is a plug (2) electrically connected. The outside of the plug (2) is wrapped with an insulating sleeve. One end of the insulating sleeve close to the device socket (1) is provided with an installation groove, and a spring (5) is arranged inside the installation groove, and the spring (5) is fixed to the insulating sleeve; Inside the insulating sleeve, there is a groove (201). The cross-sectional shape of the groove (201) is T-shaped. On both sides inside the groove (201), there are bimetallic strips (6) installed. There are also two groups of symmetrically arranged elastic pieces (3) installed on the groove (201). The elastic pieces (3) penetrate through the insulating layer and extend to the outside. One end of the elastic piece (3) is fixedly connected with a pin (4). On the top of the device socket (1), there are two groups of pin holes (101), and the pin (4) is adapted to the pin hole (101); On the top of the voltage detection device body, there is a limit rod (7) installed. The outside of the insulating sleeve is fixedly connected with a support plate, and the support plate is sleeved outside the limit rod (7) and is in sliding fit with it.

2. The voltage detection device for power supply according to claim 1, characterized in that: On the top of the voltage detection device body, there is a round rod (8) rotatably connected. On the outer side of the top of the round rod (8), there is a spiral groove (801). On one side of the support plate, there is a round hole, and a slider (19) is installed at the position of the round hole. One end of the slider (19) is located inside the spiral groove (801) and is in sliding fit with it; At the bottom of the round rod (8), there is an energy storage component.

3. The voltage detection device for power supply according to claim 2, characterized in that: The energy storage component includes a sleeve (10). The sleeve (10) is fixedly connected to the top of the voltage detection body. The sleeve (10) is sleeved outside the round rod (8), and the round rod (8) is connected with the sleeve (10) through a clockwork spring (9).

4. A voltage detection device for power supply according to claim 3, characterized in that: Between the round rods (8), there is a driving component. The driving component includes a transmission guide rod (11). The transmission guide rod (11) is fixedly connected to the middle of the round rod (8), and the cross-sectional shape of the transmission guide rod (11) is U-shaped; On the outside of the transmission guide rod (11), there is a convex block (12) rotatably connected; On one side of the convex block (12), there is a suction component.

5. The voltage detection device for power supply according to claim 4, characterized in that: The suction component includes a piston rod (13). One end of the piston rod (13) is hinged to the convex block (12), and the other end of the piston rod (13) is hinged to a piston (14). The outside of the piston (14) is provided with a piston cylinder (15). One end of the piston cylinder (15) extends into the device socket (1), and the piston (14) is in sealed sliding with the piston cylinder (15); One end of the piston cylinder (15) is communicated with an air outlet pipe, and the outside of the piston cylinder (15) is communicated with an air inlet pipe. Check valves (18) are installed on the outside of the air outlet pipe and the air inlet pipe.

6. The voltage detection device for power supply according to claim 5, characterized in that: Inside the device socket (1), there is an air duct cavity (16). The air duct cavity (16) is communicated with the air outlet pipe, and the cross-sectional shape of the air duct cavity (16) is annular; On one side close to the inner ring of the airway cavity (16), a plurality of groups of air holes (17) are formed, and the air holes (17) communicate with the airway cavity (16), and the plurality of groups of air holes (17) are annularly distributed.

7. The voltage detection device for power supply according to claim 6, characterized in that: The air holes (17) are inclined, and one end of the air holes (17) close to the airway cavity (16) is higher than the end far from the airway cavity (16).

8. A voltage detection device for power supply according to claim 1, characterized in that: Heat dissipation fins are annularly distributed on the outer circle of the device socket (1).

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