Ammeter convenient to disassemble and assemble

Abstract

The invention provides an ammeter convenient to disassemble and assemble, and relates to the technical field of ammeters. The electric meter convenient to disassemble and assemble comprises an electric meter indicating end, an insulating shell arranged at the bottom of the electric meter indicating end, a plurality of indicating end wiring copper plates arranged at the bottom of the electric meter indicating end, a plurality of wiring terminals fixed in the insulating shell, and fixed wiring copper plates embedded in the plurality of wiring terminals, the electric meter is characterized in that the bottom of the electric meter indicating end is also provided with an electric meter wiring end. The problem that in the dismounting and mounting process of the electric meter, the electrified condition of the electric wire is not easy to perceive, and then danger is caused is solved, the electric meter interface is blocked mainly through induction current generated on the electromagnetic coil, the electrified electric wire is prevented from being directly overlapped on the terminal, it is guaranteed that the current carried by the electric wire does not flow into the electric meter any more, and the safety of the electric meter is guaranteed. The internal structure of the electric meter is protected, and dangerous accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electric meters, in particular to an electric meter which is easy to disassemble and install. Background Art

[0002] The main function of a household electricity meter is to accurately measure household electricity consumption so that users and power supply departments can calculate electricity bills. It has a data display function that can intuitively present electricity consumption values. The installation of electricity meters is usually performed by professional electricians. First, determine the installation location, fix the meter in a suitable meter box, connect the power input and output lines, and ensure that the connection is firm and the line is correct. Similarly, disassembly of the meter also requires professional operation. First, cut off the power supply, remove the input and output line connections, and carefully remove the meter.

[0003] However, if workers accidentally operate the meter while it is live during installation and removal, it will be extremely dangerous. First, direct contact with live parts may cause electric shock accidents. The current passing through the human body may cause muscle spasms, cardiac arrest and other life-threatening situations. In addition, during the operation, if the tool accidentally touches the live parts, it may cause a short circuit and generate arc sparks, which will not only damage the meter and surrounding equipment, but may also cause a fire. However, the complex circuit and backup power supply settings make it difficult to detect that the wires are live. In complex circuits, the lines are intertwined, and the backup power supply may automatically start to operate in some cases, causing some wires to appear to be powered off. In the case of a power outage, the line is actually still energized, which increases the difficulty for operators to judge whether the line is energized, and may cause danger if they are not careful. If the electric meter is installed or removed without confirming whether the line is actually de-energized, it is very likely that the energized line will be touched without knowing it, causing serious consequences. At the same time, live operation may also affect the stable operation of the entire power system, resulting in power outages or voltage fluctuations, affecting the normal electricity use of other users. Based on the above viewpoints, the present invention provides an electric meter that can avoid live operation during the installation and removal of the electric meter, thereby greatly improving the safety of the installation and removal of the electric meter. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an electric meter that is easy to disassemble and install, which solves the problem that it is difficult to detect the live wires during the disassembly and installation process of the electric meter, which may lead to danger. The present invention mainly generates an induced current on the electromagnetic coil to seal the interface of the electric meter, so as to prevent the live wires from being directly connected to the terminals, thereby ensuring that the current carried by the wires no longer flows into the interior of the electric meter, thereby protecting the internal structure of the electric meter and avoiding the occurrence of dangerous accidents.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric meter that is easy to disassemble and install, comprising an electric meter indicating terminal, an insulating shell installed at the bottom of the electric meter indicating terminal, a plurality of indicating terminal wiring copper plates arranged at the bottom of the electric meter indicating terminal, a plurality of wiring terminals fixed inside the insulating shell, a fixed wiring copper plate embedded inside the plurality of wiring terminals, and locking bolts installed on the plurality of wiring terminals, characterized in that an electric meter wiring terminal is also installed at the bottom of the electric meter indicating terminal, the electric meter wiring terminal comprises an electricity connection assembly, a plurality of the indicating terminal wiring copper plates are provided with a groove body for providing the electricity connection assembly with sliding up and down, the electricity connection assembly is limitedly slidably connected in the groove body of the indicating terminal wiring copper plate, and the connection The electrical assembly includes a number of main electrical connection boards equal to the number of copper plates for connecting the indicating end and a number of insulating plates connected between every two main electrical connection boards, a number of the main electrical connection boards are suspended on the lower side wall of the indicating end of the meter by springs, the upper limit sliding connection of the inner wall of the insulating shell is provided with a number of sliding electrical connection components equal to the number of copper plates for connecting the indicating end, the sliding electrical connection components include a top electrical connection board, the top electrical connection board is suspended on the lower side wall of the indicating end of the meter by springs, a bimetallic strip is installed on the front side wall of the top electrical connection board, the other end of the bimetallic strip is installed with a bottom electrical connection board, both sides of the front side wall of the bottom electrical connection board are fixedly connected with hanging rods, and the other ends of the two hanging rods are commonly connected with a wedge block; The bottom of the front side walls of several of the fixed wiring copper plates are fixedly connected with an anti-touch component, and the anti-touch component includes a power socket, and electromagnetic coils are connected to the two ends of the bottom of the power socket, and the electromagnetic coils are arranged above the wire outlet hole of the insulating shell. An electromagnet is installed on the top of the power socket, and the input end and output end of the electromagnetic coil are electrically connected to the input end and output end of the power socket respectively. A reset spring is fixedly connected to the rear side wall of the power socket, and the other end of the reset spring is fixedly connected to a magnetic wedge head, and the axis of the magnetic wedge head and the reset spring are located on the same straight line.

[0006] Preferably, an extruded elastic plate is fixedly connected to the front inner wall of each of the wiring terminals, and a bottom cover plate is fixedly connected to the bottom of each of the extruded elastic plates.

[0007] Preferably, the left and right inner walls of the insulating shell are connected with anti-electricity theft components through rolling steel balls in a limited sliding manner, and the anti-electricity theft components include a magnetic block hanging plate, on which are nested a number of matching magnetic blocks matching the number of electromagnets, and a clamping plate is connected with a limited sliding manner above each of the wiring terminals, the clamping plate is located between the magnetic block hanging plate and the anti-touch component, and the bottom ends of the clamping plate are fixed to both sides of the extruded elastic plate.

[0008] Preferably, a cooling chamber is installed on the rear side wall of the insulating shell, and the cooling chamber includes a high-pressure air chamber, and a sealing pressure plate is connected to the interior of the high-pressure air chamber near the upper side wall through a plurality of springs.

[0009] Preferably, a slot for placing the front end of a sealing pressure plate is provided on the rear side wall of the main power board, and a slot structure for providing a sliding space for the sealing pressure plate is provided on the front side wall of the high-pressure air chamber, and sealing plates for closing the slot structure provided on the front side wall of the high-pressure air chamber are installed on the upper and lower side walls of the sealing pressure plate.

[0010] Preferably, the front side wall of the high-pressure air chamber is fixedly connected to a guide nozzle on the rear side of each bimetallic strip, the interior of the guide nozzle is fixedly connected to a spring plate, the interior of the guide nozzle is fixedly connected to a spring plate, the front side wall of the spring plate is connected to a sealing steel ball through a spring, and the sealing steel ball is squeezed between the guide nozzle and the bimetallic strip.

[0011] Preferably, an air supply pipe is fixedly connected to the front side wall of the high-pressure air chamber, and the air supply pipe passes through the middle position of the insulating shell.

[0012] Preferably, the tail of the magnetic block hanging plate is fixedly connected with a flow sealing plate, the bottom of the air supply pipe is closely attached to the upper side wall of the flow sealing plate, and a pressure relief groove is provided at the rear end of the bottom of the air supply pipe.

[0013] The present invention has the following technical points and beneficial effects: 1. During the installation and wiring of the electric meter, if the wire connected to the electric meter is energized, an induced current will be generated on the electromagnetic coil when the wire passes through the electromagnetic coil. Then, under the action of the induced electromotive force, an induced current will flow. When the induced current flows through the electromagnet, magnetism will be generated on the electromagnet. Under the action of magnetism, the magnetic wedge head and the matching magnetic block will move toward the electromagnet. Since the magnetic wedge head moves toward the electromagnet, the wedge block loses the squeezing of the magnetic wedge head, causing the spring originally in a compressed state to drive the sliding power connection assembly to move downward as a whole, while the remaining sliding power connection assemblies are not energized below, so that these sliding power connection assemblies are still in contact with the bottom of the power connection assembly, which causes the top power connection plate at the power connection point to no longer contact the power connection assembly, ensuring that the current carried by the wire no longer flows into the electric meter; 2. If the power connection speed is slow, that is, the wire has not yet contacted the fixed wiring copper plate, but the electromagnetic coil has generated an induced current, the magnetic block will drive the entire magnetic block hanging plate to move toward the electromagnet, and the magnetic block hanging plate is fixed on both sides of the extrusion elastic plate, so it will drive the extrusion elastic plate to deform and move closer to the fixed wiring copper plate. At this time, the bottom plate at the bottom of the extrusion elastic plate will seal the threading hole, and the wire can no longer be connected to the fixed wiring copper plate, which can fully avoid the occurrence of safety accidents caused by live operation. At the same time, if the electric meter is working, the wire inside will always have current flowing, and the magnetism will always be maintained, which will drive several wires to move forward together, so that several wires are always blocked above the threading hole, ensuring that the wires can no longer be connected on it, avoiding electricity theft; 3. If there is a sudden load change or the wire is loose, the current and voltage flowing through the bimetallic strip will increase suddenly, which will cause the temperature of the bimetallic strip to rise. The bimetallic strip will deform forward, causing the sealing steel ball originally squeezed on the back side of the bimetallic strip to extend forward. At this time, the high-pressure gas originally stored in the high-pressure gas chamber will be ejected through the guide nozzle. Under the effect of throttling expansion, the temperature of the high-pressure gas will decrease. When the bimetallic strip becomes an arc with a certain curvature, the high-pressure gas will be sprayed on the bimetallic strip, thereby quickly cooling the fixed wiring copper plate and the surrounding components. 4. If the load and current are in an unstable state for a long time, the high-pressure gas will be ejected excessively, which will cause the pressure inside the high-pressure gas chamber to continue to decrease, and the gas originally compressed under the sealing pressure plate will not be enough to support the sealing pressure plate, so that the sealing pressure plate will drop under the action of the spring. When the sealing pressure plate drops to drive the power connection assembly away from the indicating terminal wiring copper plate, the entire meter equipment will be powered off, thereby protecting the meter from damage; 5. If someone attempts to destroy the magnetic plate to steal electricity during the use of the meter, the air flow will be discharged from the pressure relief groove of the air supply duct due to the damage of the magnetic plate, thereby reducing the gas pressure stored in the high-pressure gas chamber. The sealed pressure plate will drop to drive the power connection assembly to leave the indicating terminal wiring copper plate, and the entire meter equipment will be powered off to ensure that the user's electricity is not stolen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall diagram of the present invention; Figure 2 It is a bottom schematic diagram of the present invention; Figure 3 is a first top view of the present invention; Figure 4 for Figure 3 Isometric section view along AA; Figure 5 A schematic diagram of the back of the present invention after the insulating shell is hidden; Figure 6It is a schematic diagram of the first structure inside the insulating shell of the present invention; Figure 7 It is a second structural schematic diagram of the interior of the insulating housing in the present invention; Figure 8 for Figure 6 A schematic diagram of the structure after a set of wiring terminals are hidden; Fig. 9 is a second top view of the present invention; Fig.10 for Fig. 9 Cross-sectional view along the middle line BB; Fig.11 for Fig. 9 Isometric section view along BB; Fig.12 It is a front view of the present invention; Fig.13 for Fig.12 Isometric section view along CC.

[0015] Among them, 1. meter indication terminal; 2. meter connection terminal; 3. cooling room; Indicator terminal wiring copper plate; Insulating housing; 22, terminal block; 23, locking bolt; 24, anti-touch assembly; 25, fixed wiring copper plate; 26, sliding power connection assembly; 27, power connection assembly; 28, anti-theft assembly; 29, clamping plate; 221, extruded elastic plate; 222, bottom plate; 241, electromagnetic coil; 242, electric socket; 243, electromagnet; 244, return spring; 245, magnetic wedge head; 261, wedge block; 262, hanging rod; 263, bottom power board; 264, top power board; 265, bimetallic strip; 271. Main connection board; 272. Insulation board; 281, magnetic block hanging plate; 282, matching magnetic block; 283, flow sealing plate; 31. High-pressure air chamber; 32. Air supply duct; 33. Sealing pressure plate; 34. Diversion nozzle; 35. Spring plate; 36. Sealing steel ball. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0017] Embodiment 1 like Figures 1 to 8 As shown, an embodiment of the present invention provides an electric meter that is easy to disassemble and install, including an electric meter indicating terminal 1, an insulating shell 21 installed at the bottom of the electric meter indicating terminal 1, a plurality of indicating terminal wiring copper plates 11 arranged at the bottom of the electric meter indicating terminal 1, a plurality of wiring terminals 22 fixed inside the insulating shell 21, a fixed wiring copper plate 25 embedded inside the plurality of wiring terminals 22, and a locking bolt 23 installed on the plurality of wiring terminals 22, characterized in that an electric meter wiring terminal 2 is also installed at the bottom of the electric meter indicating terminal 1, the electric meter wiring terminal 2 includes a power connection assembly 27, and a plurality of indicating terminal wiring copper plates 11 are provided with a plurality of wiring terminals 22. The power connection assembly 27 is connected to the slot of the indicating terminal copper plate 11 by limited sliding. The power connection assembly 27 includes a number of total power connection plates 271 equal to the number of the indicating terminal copper plates 11 and a number of insulating plates 272 connected between each two total power connection plates 271. The total power connection plates 271 are suspended on the lower side wall of the indicating terminal 1 of the meter by springs. The inner wall of the insulating housing 21 is connected to a number of sliding power connection components 26 equal to the number of the indicating terminal copper plates 11 by limited sliding. The sliding power connection component 26 includes a top power connection plate 264, and the top power connection plate 264 is suspended on the indicating terminal of the meter by springs. 1, a bimetallic strip 265 is installed on the front side wall of the top power board 264, and a bottom power board 263 is installed on the other end of the bimetallic strip 265. The front side wall of the bottom power board 263 is fixedly connected to the two sides of the front side wall, and the other ends of the two hanging rods 262 are commonly connected to the wedge block 261. During the installation and wiring of the electric meter, if the wire connected to the electric meter is charged, when the wire passes into the electromagnetic coil 241, an induced current is generated on the electromagnetic coil 241. Then, under the action of the induced electromotive force, an induced current will flow. When the induced current flows through the electromagnet 243, the electromagnet 243 Magnetism will be generated, and under the effect of magnetism, the magnetic wedge head 245 and the matching magnetic block 282 will move toward the electromagnet 243. Since the magnetic wedge head 245 moves toward the electromagnet 243, the wedge block 261 loses the squeezing of the magnetic wedge head 245, causing the spring originally in a compressed state to drive the sliding power connection component 26 to move downward as a whole, while the remaining sliding power connection components 26 are not connected to electricity below, so that these sliding power connection components 26 are still in contact with the bottom of the power connection assembly 27, thereby causing the top power connection plate 264 at the power connection point to no longer contact the power connection assembly 27, ensuring that the current carried by the wire no longer flows into the electric meter.

[0018] like Figure 7 and Figure 8As shown, the bottom of the front side wall of several fixed wiring copper plates 25 are fixedly connected with an anti-touch component 24, and the anti-touch component 24 includes a power socket 242, and the two ends of the bottom of the power socket 242 are connected with an electromagnetic coil 241, and the electromagnetic coil 241 is arranged above the outlet hole of the insulating shell 21. An electromagnet 243 is installed on the top of the power socket 242, and the input end and the output end of the electromagnetic coil 241 are electrically connected to the input end and the output end of the power socket 242 respectively. A reset spring 244 is fixedly connected to the rear side wall of the power socket 242, and the other end of the reset spring 244 is fixedly connected with a The magnetic wedge head 245, the axis of the magnetic wedge head 245 and the reset spring 244 are located on the same straight line, the front inner wall of each terminal 22 is fixedly connected with an extrusion elastic plate 221, the bottom of each extrusion elastic plate 221 is fixedly connected with a bottom plate 222, the left and right inner walls of the insulating shell 21 are connected with an anti-theft component 28 through a rolling steel ball limit sliding connection, the anti-theft component 28 includes a magnetic block hanging plate 281, and a plurality of matching magnetic blocks 282 matching the number of electromagnets 243 are nested on the magnetic block hanging plate 281, and the upper limit sliding connection of each terminal 22 A clamping plate 29 is connected, and the clamping plate 29 is located between the magnetic block hanging plate 281 and the anti-touch component 24. The two ends of the bottom of the clamping plate 29 are fixed on both sides of the extrusion elastic plate 221. If the power connection speed is slow, that is, the wire has not yet contacted the fixed wiring copper plate 25, but the electromagnetic coil 241 has generated an induced current, the magnetic block 282 will drive the entire magnetic block hanging plate 281 to move toward the electromagnet 243, and the magnetic block hanging plate 281 is fixed on both sides of the extrusion elastic plate 221, so it will drive the extrusion elastic plate 221 to deform and move closer to the fixed wiring copper plate 25. At the same time, the bottom plate 222 located at the bottom of the extruded elastic plate 221 seals the threading hole, and the wires can no longer be connected to the fixed wiring copper plate 25, which can fully avoid the occurrence of safety accidents caused by live working. At the same time, if the electric meter is working, the wires inside the electromagnetic coil 241 always have current flowing, and the electromagnet 243 always maintains magnetism, and the magnetic block hanging plate 281 will drive the plurality of clamping plates 29 to move forward together, so that the plurality of bottom plates 222 are always blocked above the threading hole, ensuring that the wires can no longer be connected to the fixed wiring copper plate 25, thereby avoiding electricity theft.

[0019] Embodiment 2 like Figures 10 to 13As shown, this embodiment provides another technical solution based on the first embodiment. A cooling chamber 3 is installed on the rear side wall of the insulating shell 21. The cooling chamber 3 includes a high-pressure gas chamber 31. The inner part of the high-pressure gas chamber 31 near the upper side wall is connected to a sealing pressure plate 33 through a plurality of springs. A card slot for placing the front end of the sealing pressure plate 33 is provided on the rear side wall of the main power board 271, and a slot structure for providing an upward and downward sliding space for the sealing pressure plate 33 is provided on the front side wall of the high-pressure gas chamber 31. The upper and lower side walls of the sealing pressure plate 33 are A sealing plate for sealing the slot structure opened on the front side wall of the high-pressure air chamber 31 is installed. The front side wall of the high-pressure air chamber 31 is fixedly connected to a guide nozzle 34 at the rear side of each bimetallic strip 265. The inside of the guide nozzle 34 is fixedly connected to a spring plate 35. The inside of the guide nozzle 34 is fixedly connected to the spring plate 35. The front side wall of the spring plate 35 is connected to a sealing steel ball 36 through a spring. The sealing steel ball 36 is squeezed between the guide nozzle 34 and the bimetallic strip 265. If a sudden load change occurs or the wire is loose, the flow in the bimetallic strip 265 will 5, which leads to an increase in the temperature of the bimetallic strip 265. The bimetallic strip 265 deforms forward, causing the sealing steel ball 36 originally squeezed on the rear side of the bimetallic strip 265 to extend forward. At this time, the high-pressure gas originally stored in the high-pressure gas chamber 31 is ejected through the guide nozzle 34. Under the effect of throttling expansion, the temperature of the high-pressure gas becomes lower, and because the bimetallic strip 265 becomes an arc with a certain curvature, when the high-pressure gas is sprayed on the bimetallic strip 265, the low-temperature airflow is sprayed on the fixed wiring copper plate through the guidance of the bimetallic strip 265. 25, thereby quickly cooling the fixed wiring copper plate 25 and the surrounding components. If the load and current are in an unstable state for a long time, the high-pressure gas will be excessively ejected, which will cause the internal air pressure of the high-pressure gas chamber 31 to continue to decrease, and the gas originally compressed under the sealing pressure plate 33 will be insufficient to support the sealing pressure plate 33, so that the sealing pressure plate 33 will drop under the action of the spring. When the sealing pressure plate 33 drops to drive the power connection assembly 27 to leave the indicating terminal wiring copper plate 11, the entire meter equipment is powered off, thereby protecting the meter from damage.

[0020] like Figures 10 to 13 As shown, an air supply pipe 32 is fixedly connected to the front side wall of the high-pressure air chamber 31, and the air supply pipe 32 passes through the middle position of the insulating shell 21. A sealing plate 283 is fixedly connected to the tail of the magnetic block hanging plate 281. The bottom of the air supply pipe 32 is tightly attached to the upper side wall of the sealing plate 283. A pressure relief groove is provided at the rear end of the bottom of the air supply pipe 32. If someone attempts to destroy the magnetic block hanging plate 281 to steal electricity during the use of the electric meter, the airflow will be discharged from the pressure relief groove of the air supply pipe 32 due to the damage of the magnetic block hanging plate 281, thereby reducing the air pressure of the gas stored in the high-pressure air chamber 31. The sealing pressure plate 33 also drops to drive the power connection assembly 27 to leave the indicating terminal wiring copper plate 11, and the entire electric meter equipment is powered off to ensure that the user is not stolen electricity.

[0021] Working principle: During the installation and wiring of the meter, if the wire connected to the meter is energized, when the wire passes through the electromagnetic coil 241, induction is generated on the electromagnetic coil 241 (the household electric meter is generally connected to alternating current. The essence of alternating current is a current whose magnitude and direction change periodically over time. When alternating current passes through the wire, a changing magnetic field is generated around it. According to Maxwell's electromagnetic field theory, a changing magnetic field will generate an induced electromotive force. When the electromagnetic coil 241 is in this changing magnetic field, an induced electromotive force will be generated in the conductor inside it). Then, under the action of the induced electromotive force, an induced current will flow. When an induced current flows through the electromagnet 243, magnetism will be generated on the electromagnet 243, and under the action of magnetism, the magnetic wedge head 245 and the matching magnetic block 282 will move toward the electromagnet 243. Since the magnetic wedge head 245 moves toward the electromagnet 243, the wedge block 261 loses the squeezing of the magnetic wedge head 245, causing the spring originally in a compressed state to drive the sliding power connection component 26 to move downward as a whole, while the remaining sliding power connection components 26 are not powered below, so that these sliding power connection components 26 are still in contact with the power connection assembly 27, thereby causing the top power connection plate 264 at the power connection point to no longer contact the power connection assembly 27, ensuring that the current carried by the wire no longer flows into the electric meter.

[0022] Since the backup power supply may be automatically put into operation in some cases, some wires are actually still energized when it seems that the power is off. If the power connection speed is slow, that is, the wires have not yet contacted the fixed wiring copper plate 25, but the electromagnetic coil 241 has generated an induced current, the magnetic block 282 will drive the entire magnetic block hanging plate 281 to move toward the electromagnet 243. The magnetic block hanging plate 281 is fixed on both sides of the extrusion elastic plate 221, so it will drive the extrusion elastic plate 221 to deform and move toward the fixed wiring copper plate 25. At this time, the bottom plate 222 at the bottom of the extrusion elastic plate 221 will seal the threading hole, and the wires can no longer be connected to the fixed wiring copper plate 25, which can fully Avoid the occurrence of safety accidents caused by live working. At the same time, if the electric meter is working, there is always current flowing in the wires inside the electromagnetic coil 241, then the electromagnet 243 always maintains magnetism, and the magnetic block hanging plate 281 will drive the plurality of clamping plates 29 to move forward together, so that the plurality of bottom sealing plates 222 are always blocked above the threading holes, ensuring that the wires can no longer be overlapped on the fixed wiring copper plate 25, thereby avoiding electricity theft. In the process of removing the wires, if the power is not turned off, the electromagnet 243 is always energized, which will drive the anti-electricity theft component 28 to squeeze the clamping plate 29, so that the wires are clamped inside and cannot be detached from the terminal, thereby avoiding the situation where the wires are directly removed without turning off the power.

[0023] If there is a sudden load change or the wire is loose, the current and voltage flowing through the bimetallic strip 265 will increase suddenly, causing the temperature of the bimetallic strip 265 to rise, and the bimetallic strip 265 will deform forward (the bimetallic strip 265 is formed by rolling two metal strips with different thermal expansion coefficients. When the temperature changes, the thermal expansion of the two metals is different, causing the bimetallic strip to bend and deform), so that the sealing steel ball 36 originally squeezed on the rear side of the bimetallic strip 265 will extend forward. At this time, the high-pressure gas originally stored in the high-pressure gas chamber 31 will be ejected through the guide nozzle 34. Under the effect of throttling expansion, the temperature of the high-pressure gas will decrease, and the bimetallic strip 265 will become an arc with a certain curvature. When the high-pressure gas is sprayed on the bimetallic strip 265, the low-temperature airflow is sprayed into the fixed wiring copper plate 25 through the guidance of the bimetallic strip 265, thereby quickly cooling the fixed wiring copper plate 25 and the adjacent components. If the load and current are in an unstable state for a long time, the high-pressure gas will be excessively sprayed, which will cause the internal air pressure of the high-pressure gas chamber 31 to continue to decrease, and the gas originally compressed under the sealing pressure plate 33 will be insufficient to support the sealing pressure plate 33, so that the sealing pressure plate 33 will drop under the action of the spring. When the sealing pressure plate 33 drops to drive the power connection assembly 27 to leave the indicating terminal wiring copper plate 11, the entire meter equipment is powered off, thereby protecting the meter from damage.

[0024] If someone attempts to destroy the magnetic plate 281 to steal electricity during the use of the electric meter, the air flow will be discharged from the pressure relief groove of the air supply pipe 32 due to the damage of the magnetic plate 281, thereby reducing the air pressure of the gas stored in the high-pressure air chamber 31. The sealing pressure plate 33 also drops to drive the power connection assembly 27 to leave the indicating terminal wiring copper plate 11, and the entire electric meter equipment is powered off to ensure that the user's electricity is not stolen.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric meter that is easy to disassemble and install, comprising an electric meter indicating terminal (1), an insulating housing (21) installed at the bottom of the electric meter indicating terminal (1), a plurality of indicating terminal connection copper plates (11) arranged at the bottom of the electric meter indicating terminal (1), a plurality of connection terminals (22) fixed inside the insulating housing (21), a fixed connection copper plate (25) embedded inside the plurality of connection terminals (22), and locking bolts (23) installed on the plurality of connection terminals (22), It is characterized in that The bottom of the meter indication terminal (1) is also provided with a meter connection terminal (2), the meter connection terminal (2) comprising a power connection assembly (27), a plurality of the indication terminal connection copper plates (11) are provided with a slot for providing the power connection assembly (27) with an upward and downward sliding motion, the power connection assembly (27) is limitedly slidably connected in the slot of the indication terminal connection copper plates (11), the power connection assembly (27) comprising a plurality of main connection plates (271) equal in number to the indication terminal connection copper plates (11) and a plurality of insulating plates (272) connected between every two main connection plates (271), the plurality of main connection plates (271) being suspended on the lower side wall of the meter indication terminal (1) by means of springs, the insulating plates (272) being connected between the main connection plates (271) and ... The inner wall of the housing (21) is slidably connected to a plurality of sliding power connection assemblies (26) in the same number as the indicating terminal wiring copper plates (11), the sliding power connection assemblies (26) comprising a top power connection plate (264), the top power connection plate (264) being suspended on the lower side wall of the indicating terminal (1) of the meter via a spring, a bimetallic strip (265) being mounted on the front side wall of the top power connection plate (264), a bottom power connection plate (263) being mounted on the other end of the bimetallic strip (265), both sides of the front side wall of the bottom power connection plate (263) being fixedly connected to hanging rods (262), the other ends of the two hanging rods (262) being commonly connected to a wedge block (261); The bottom of the front side wall of several of the fixed wiring copper plates (25) is fixedly connected to an anti-touch component (24), the anti-touch component (24) comprises an electric socket (242), the two ends of the bottom of the electric socket (242) are connected to an electromagnetic coil (241), the electromagnetic coil (241) is arranged above the outlet hole of the insulating shell (21), an electromagnet (243) is installed on the top of the electric socket (242), the input end and the output end of the electromagnetic coil (241) are respectively electrically connected to the input end and the output end of the electric socket (242), a reset spring (244) is fixedly connected to the rear side wall of the electric socket (242), the other end of the reset spring (244) is fixedly connected to a magnetic wedge head (245), and the axis of the magnetic wedge head (245) and the reset spring (244) are located on the same straight line.

2. An electric meter that is easy to disassemble and install according to claim 1, It is characterized in that An extrusion elastic plate (221) is fixedly connected to the front inner wall of each of the wiring terminals (22), and a bottom cover plate (222) is fixedly connected to the bottom of each of the extrusion elastic plates (221).

3. An electric meter that is easy to disassemble and install according to claim 1, It is characterized in that The left and right inner walls of the insulating housing (21) are connected to an anti-electricity theft component (28) by means of a rolling steel ball limit sliding connection. The anti-electricity theft component (28) comprises a magnetic block hanging plate (281). A plurality of matching magnetic blocks (282) matching the number of electromagnets (243) are nested on the magnetic block hanging plate (281). A clamping plate (29) is connected to the upper side of each of the wiring terminals (22) by means of a limit sliding connection. The clamping plate (29) is located between the magnetic block hanging plate (281) and the anti-touch component (24). The bottom ends of the clamping plate (29) are fixed to the two sides of the extrusion elastic plate (221).

4. An electric meter that is easy to disassemble and install according to claim 3, It is characterized in that A cooling chamber (3) is installed on the rear side wall of the insulating shell (21), the cooling chamber (3) comprising a high-pressure air chamber (31), the interior of the high-pressure air chamber (31) being connected to a sealing pressure plate (33) at a position close to the upper side wall via a plurality of springs.

5. An electric meter that is easy to disassemble and install according to claim 4, It is characterized in that A slot for accommodating the front end of the sealing pressure plate (33) is provided on the rear side wall of the main power connection plate (271), and a slot structure for providing an upward and downward sliding space for the sealing pressure plate (33) is provided on the front side wall of the high-pressure air chamber (31). Sealing plates for sealing the slot structure provided on the front side wall of the high-pressure air chamber (31) are installed on the upper and lower side walls of the sealing pressure plate (33).

6. An electric meter that is easy to disassemble and install according to claim 4, It is characterized in that A flow guide nozzle (34) is fixedly connected to the front side wall of the high-pressure air chamber (31) and located at the rear side of each bimetallic strip (265); a spring plate (35) is fixedly connected inside the flow guide nozzle (34); a spring plate (35) is fixedly connected inside the flow guide nozzle (34); a sealing steel ball (36) is connected to the front side wall of the spring plate (35) via a spring; the sealing steel ball (36) is squeezed between the flow guide nozzle (34) and the bimetallic strip (265).

7. An electric meter that is easy to disassemble and install according to claim 6, It is characterized in that An air supply pipe (32) is fixedly connected to the front side wall of the high-pressure air chamber (31), and the air supply pipe (32) passes through the middle position of the insulating shell (21).

8. An electric meter that is easy to disassemble and install according to claim 7, It is characterized in that The tail of the magnetic block hanging plate (281) is fixedly connected to a flow sealing plate (283), the bottom of the air supply pipe (32) is closely attached to the upper side wall of the flow sealing plate (283), and a pressure relief groove is provided at the bottom of the air supply pipe (32) near the rear end.

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