Electric meter with protection function

Abstract

The invention discloses an electric meter with a protection function, which relates to the technical field of electric meters and comprises a shell, an electric meter body, an arc extinguishing assembly and a fire extinguishing assembly. The arranged arc extinguishing assembly comprises the sealing assembly, once electric arc appears and induced current is generated, the sealing assembly can be rapidly driven to act to release arc extinguishing particles to conduct arc extinguishing protection on the electric meter, the fire extinguishing assembly comprises the air bag, the air bag is internally provided with a fire extinguishing medium, and the high-temperature and high-heat environment generated by the electric arc can promote the fire extinguishing medium to be rapidly gasified and expanded; in addition, the air bag is provided with a groove, the groove can be broken firstly, so that the fire extinguishing medium is sprayed towards a fire occurrence area in a concentrated mode, disordered dispersion of the fire extinguishing medium is avoided, and compared with other conventional electric signal control modes, fire extinguishing efficiency is improved. The protection of arc extinguishing and fire extinguishing of the electric meter can be completed only by depending on the characteristics of the electric arc instead of depending on a complex external control signal transmission process, and when the arc extinguishing piece needs to be replaced, the replacement is convenient and fast by arranging the material changing assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electric meters, and in particular to an electric meter with a protection function. Background Art

[0002] Electricity meter is short for energy meter, which is used to measure electric energy. It is also called watt-hour meter, fire meter, energy meter, kilowatt-hour meter. The development process of electricity meter is mechanical meter-electronic meter-intelligent electronic meter. Mechanical meters are rarely used, and electronic meters are used on a large scale. In the business scope of State Grid Corporation of China, the proportion of smart meters installed is 40%. Electricity meter can display various values ​​such as power, demand, voltage, current, power, time, remaining amount, etc.; it can measure operating parameters such as active power, reactive power, power factor, etc.; it can prevent unauthorized persons from programming operations through dual protection measures such as programming switch and programming password; it can also control fees.

[0003] At present, due to a variety of reasons such as humid environment, poor contact, aging and damage of components, overload and short circuit, continuous arcs are generated at the wiring of the meter or open flames are generated due to arcs, which makes the meter easy to burn out or even cause fire. The common solution is to set a temperature or smoke sensor in the meter protection box to detect abnormal conditions and meet the trigger conditions, and then send a signal to the control unit to execute arc extinguishing and fire prevention actions. This kind of solution requires external stable power supply, but it is difficult to ensure in complex environments where arcs or fires occur. Therefore, it is difficult to extinguish arcs and prevent fires for meters. In addition, arc extinguishing or fire extinguishing media cannot ensure that they can effectively act on the areas that need to be extinguished, resulting in excessive diffusion and waste or affecting other unnecessary areas. It is troublesome to replace the arc extinguishing and fire extinguishing media structure.

[0004] Therefore, the present invention proposes an electric meter with a protection function to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an electric meter with a protective function to solve the technical problems raised in the above background technology that the electric meter is difficult to protect against arc extinguishing and fire, the arc extinguishing and fire extinguishing media cannot effectively act on the area where fire extinguishing is required, and the replacement of arc extinguishing or fire extinguishing media structures is troublesome.

[0006] To achieve the above object, the present invention provides the following technical solution: an electric meter with a protective function, comprising: a shell, a meter body is fixedly connected to the shell cavity, a wiring place is arranged at the bottom of the meter body, an arc extinguishing component is arranged outside the wiring place, a fire extinguishing component is fixedly connected to the inner wall of the shell, and the number of the fire extinguishing components is multiple and distributed around the inside of the meter body;

[0007] The arc extinguishing assembly comprises a closing assembly, a storage assembly, a sealing assembly and a material replacement assembly. The wiring point is arranged in the cavity of the closing assembly, and the storage assembly is fixedly connected to the outside of the shell.

[0008] Preferably, the closing assembly includes a triangular chassis, and a first push plate and a second push plate parallel to each other are slidably connected on two inclined surfaces of the triangular chassis, a first square groove is opened on the top of the first push plate, and the first sliding plate is slidably inserted inside the first square groove, a second square groove is opened on the top of the second push plate, and the second sliding plate is slidably inserted inside the second square groove, a first tooth plate and a second tooth plate are correspondingly arranged on both sides of the first sliding plate and the second sliding plate, a gear is meshed between the first tooth plate and the second tooth plate, a pull rod is rotatably connected to one side of the first sliding plate, a first through hole is opened on the top of the second sliding plate, and the pull rod is arranged to pass through the first through hole, and a sealing rubber sleeve is fixedly connected to the bottom of the triangular chassis.

[0009] Preferably, the storage assembly includes a storage barrel, which is fixedly connected to the outside of the shell, a funnel piece is fixedly connected to the top of the storage barrel, a third sliding plate is slidably connected to the open end of the funnel piece, the third sliding plate passes through the side wall of the shell, a second through hole is provided on the side of the third sliding plate away from the funnel piece, the second through hole is slidably connected to a guide rod, the guide rod is fixedly connected to the meter body, a reset spring is sleeved on the guide rod, one end of the reset spring is fixedly connected to the meter body, and the other end of the reset spring is fixedly connected to the third sliding plate, a square tube is connected to the bottom of the storage barrel, the square tube passes through the shell and is connected to the storage cavity, and an arc extinguishing piece is arranged in the storage barrel.

[0010] Preferably, the sealing assembly is arranged on the outer side of the lower end of the square tube, and the sealing assembly includes a coil fixing part, a coil is axially wound on the outer side of the coil fixing part, a magnetic core is slidably connected to the inner side of the coil fixing part, a valve core is fixedly connected to the bottom end of the magnetic core, a fixing plate is fixedly connected to the top end of the coil fixing part, and the magnetic core and the fixing plate are elastically connected by a first spring.

[0011] Preferably, two inner plates are provided at the inner bottom of the shell, a slidably connected closing assembly is provided between the two inner plates, a closed storage cavity is formed between the two inner plates and the closing assembly, and the wiring point is located in the storage cavity.

[0012] Preferably, the housing comprises a front cover plate, a slot member is fixedly connected to the bottom of the front cover plate, a lower cover plate is arranged at the bottom of the front cover plate, and a discharge outlet is opened at the bottom end of the lower cover plate.

[0013] Preferably, a shrink rubber sleeve is fixedly connected to the inner side of the front cover plate, the pull rod is sealed through the front cover plate by the shrink rubber sleeve, and one end of the pull rod away from the second sliding plate is snap-connected with the slot member.

[0014] Preferably, a sealing member is fixedly connected to the inner side of the lower end of the square tube, the sealing member is provided with a blind hole coaxial with the valve core, the valve core is slidably connected to the blind hole, the sealing member is also provided with a flow hole connected to the inner cavity of the square tube, a third through hole is provided on the outer side of the square tube, the third through hole is coaxial with the blind hole, and the diameter of the blind hole is larger than the diameter of the flow hole.

[0015] Preferably, the fire extinguishing assembly comprises an airbag, a fire extinguishing medium is arranged inside the airbag, a plurality of grooves are arranged on the surface of the airbag, and the grooves are all arranged toward the electric meter body.

[0016] Preferably, the material changing assembly includes a pressing piece, a plurality of guide plates are fixedly connected to the top of the pressing piece, a guiding inclined surface is provided at one end of the guide plate close to the second push plate, one end of the second spring is fixedly connected to the bottom of the inner side of the shell, square grooves are respectively provided on the two inclined surfaces of the triangular chassis, the square grooves are slidably connected to the pressing piece, and a discharge groove connected to the discharge port is provided at the bottom of the triangular chassis.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention provides an arc extinguishing component. When the electric meter generates an arc, current is generated in the arc. The current generates an induced magnetic field through the coil in the sealing component. The induced magnetic field acts on the magnetic core to generate electromagnetic force. The electromagnetic force overcomes the gravity and friction of the magnetic core itself and the reverse force applied by the first spring, etc., to drive the valve core to move out of the blind hole provided in the seal. The flow hole is opened, and the arc extinguishing particles in the storage barrel flow to the seal through the square tube under the action of gravity, and then flow to the storage cavity provided in the closing component through the flow hole. The wiring points provided in the storage cavity are fully covered by the arc extinguishing particles. The arc extinguishing particles often contain some compounds that can decompose and generate gas at high temperature, such as particles made of certain fluorine-containing polymers, etc., which are solid particles under normal conditions and will decompose a large amount of gas after being heated. The generated gas can quickly blow out the arc, increase the contact area between the arc and the surrounding medium, and accelerate the arc cooling and extinction process.

[0019] 2. The present invention provides a fire extinguishing component. When an electric arc is generated in the electric meter, a large amount of heat energy will be released along with the arc, causing the ambient temperature to rise sharply. A fire extinguishing medium is provided inside the airbag. The fire extinguishing medium is a dry powder fire extinguishing medium or a carbon dioxide fire extinguishing medium. These fire extinguishing media have good release properties at high temperatures. The high temperature and high heat environment will prompt the fire extinguishing medium to quickly gasify and expand, break through the constraints of the airbag, and quickly cover the electric meter body, thereby playing a fire extinguishing role such as isolating oxygen and lowering the temperature. In addition, through the grooves provided in the airbag, these pre-set grooves will be broken first to form a release channel for the fire extinguishing medium, so that the fire extinguishing medium can be sprayed to the target area in the expected direction and manner, so that the fire extinguishing medium is concentratedly sprayed toward the fire occurrence area, avoiding disorderly dispersion of the fire extinguishing medium and improving the fire extinguishing efficiency. At the same time, it can roughly limit the release range of the fire extinguishing medium, ensuring that it can effectively act on the area that needs to be extinguished, without excessive diffusion causing waste or affecting other unnecessary areas. Compared with traditional fire extinguishing medium release methods such as relying on the destruction of the overall structure or simply relying on internal pressure to gradually expand, the setting of grooves can allow the airbag to break open quickly after the triggering conditions are met, allowing the fire extinguishing medium to be sprayed out immediately. This is especially important when dealing with a rapidly spreading fire, which can allow the fire extinguishing medium to participate in the fire extinguishing process more quickly, gaining precious fire extinguishing time and enhancing the timeliness of fire extinguishing.

[0020] 3. Compared with other conventional electrical signal control methods, the present invention can complete the arc extinguishing and fire extinguishing protection of the electric meter by relying only on the characteristics of the arc itself without relying on the complex external control signal transmission process. Once the induced current occurs and triggers the generation of arc extinguishing particles, the sealing component can be quickly driven to release arc extinguishing particles. In addition, the large amount of heat energy generated by the arc causes the airbag to expand and rupture rapidly to quickly release the fire extinguishing medium.

[0021] 4. The present invention sets a material replacement component. When the arc extinguishing part needs to be replaced, the pull rod is pulled outward and rotated to disengage from the slot part, and the pull rod is pushed inward, so that the first sliding plate drives the first push plate to slide downward on the inclined surface of the triangular chassis, and the second push plate slides downward on the inclined surface of the triangular chassis through the second tooth plate, the first tooth plate and the meshing gear, and drives the second sliding plate to slide at the same time. When the second push plate slides down to the guide plate, the pressing part is pressed downward, and the arc extinguishing part in the storage cavity rolls into the discharge groove through the square groove, and then is discharged to the outside of the shell through the discharge port connected to the discharge groove, so that the replacement of the arc extinguishing part is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the folding assembly structure of the present invention.

[0025] Figure 4 It is a cross-sectional view of the storage component structure of the present invention.

[0026] Figure 5 It is a cross-sectional view of the sealing component structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the material changing assembly of the present invention.

[0028] Figure 7 It is a cross-sectional view of the material changing assembly of the present invention.

[0029] The reference numerals are: 1, housing; 11, front cover; 111, shrink sleeve; 112, slot member; 12, inner side plate; 13, lower cover; 131, discharge port;

[0030] 2. Meter body; 21. Wiring point;

[0031] 3. Arc extinguishing assembly; 31. Closing assembly; 311. First push plate; 3111. First square groove; 312. Second push plate; 3121. Second square groove; 313. First sliding plate; 314. Triangular chassis; 3141. Square groove; 3142. Discharge groove; 315. Second sliding plate; 3151. First through hole; 316. First tooth plate; 317. Second tooth plate; 318. Gear; 319. Pull rod; 32. Storage assembly; 321. Storage barrel; 3211. Arc extinguishing member; 322. Funnel member; 323 , third sliding plate; 3231, second through hole; 324, guide rod; 325, square tube; 3251, third through hole; 326, return spring; 327, sealing member; 3271, blind hole; 3272, flow hole; 33, sealing assembly; 331, coil fixing member; 3311, fixing plate; 332, coil; 333, magnetic core; 334, valve core; 335, first spring; 34, material changing assembly; 341, pressing member; 3411, guide plate; 342, second spring; 35, storage chamber; 36, sealing rubber sleeve;

[0032] 4. Fire extinguishing assembly; 41. Air bag; 411. Groove; 42. Fire extinguishing medium. DETAILED DESCRIPTION

[0033] 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] See attached Figures 1 to 7An electric meter with a protective function comprises: a shell 1, an electric meter body 2 is fixedly connected to the cavity of the shell 1, a wiring point 21 is arranged at the bottom of the electric meter body 2, an arc extinguishing component 3 is arranged outside the wiring point 21, a fire extinguishing component 4 is fixedly arranged on the inner wall of the shell 1, there are multiple fire extinguishing components 4 and they are distributed around the inside of the electric meter body 2, the arc extinguishing component 3 comprises a closing component 31, a storage component 32, a sealing component 33 and a material replacement component 34, and the storage component 32 is fixedly connected to the outside of the shell 1.

[0035] See attached Figure 3 The closing assembly 31 includes a triangular chassis 314, and the two inclined surfaces of the triangular chassis 314 are respectively slidably connected with a first push plate 311 and a second push plate 312 which are parallel to each other. The top of the first push plate 311 is provided with a first square groove 3111, and the first sliding plate 313 is slidably inserted inside the first square groove 3111. The top of the second push plate 312 is provided with a second square groove 3121, and the second sliding plate 315 is slidably inserted inside the second square groove 3121. The first tooth plate 316 and the second tooth plate 317 are correspondingly arranged on both sides of the first sliding plate 313 and the second sliding plate 315. 6 and the second tooth plate 317 are meshed with a gear 318, a pull rod 319 is rotatably connected to one side of the first sliding plate 313, a first through hole 3151 is opened at the top of the second sliding plate 315, the pull rod 319 is arranged through the first through hole 3151, a sealing rubber sleeve 36 is fixedly connected to the bottom of the triangular chassis 314, two inner plates 12 are arranged at the bottom of the inner side of the shell 1, a closing component 31 is slidably connected between the two inner plates 12, the two inner plates 12 and the closing component 31 form a closed storage chamber 35, the wiring point 21 is located in the storage chamber 35, and the storage chamber 35 is used to store the arc extinguishing member 3211.

[0036] See attached Figure 4 The storage assembly 32 includes a storage barrel 321, which is fixedly connected to the outside of the shell 1. A funnel 322 is fixedly connected to the top of the storage barrel 321. A third sliding plate 323 is slidably connected to the open end of the funnel 322. A second through hole 3231 is provided on one side of the third sliding plate 323. A guide rod 324 is slidably connected to the second through hole 3231. The guide rod 324 is fixedly connected to the meter body 2. A return spring 326 is sleeved on the guide rod 324. One end of the return spring 326 is fixedly connected to the meter body 2, and the other end of the return spring 326 is fixedly connected to the third sliding plate 323. A square tube 325 is connected to the bottom of the storage barrel 321. The square tube 325 passes through the shell 1 and is connected to the storage cavity 35. An arc extinguishing member 3211 is arranged in the storage barrel 321. The arc extinguishing member 3211 is arc extinguishing particles, and its material can be quartz sand, ceramic arc extinguishing particles or gas-generating arc extinguishing particles.

[0037] See attached Figure 5A sealing assembly 33 is arranged outside the lower end of the square tube 325. The sealing assembly 33 is an electromagnetic sealing assembly including a coil fixing part 331. A coil 332 is axially wound outside the coil fixing part 331. The coil 332 is an induction coil. A magnetic core 333 is slidably connected inside the coil fixing part 331. A valve core 334 is fixedly connected to the bottom end of the magnetic core 333. A fixing plate 3311 is fixedly connected to the top end of the coil fixing part 331. The magnetic core 333 and the fixing plate 3311 are connected by a first A spring 335 is elastically connected, and a seal 327 is fixedly connected to the inner side of the lower end of the square tube 325. The seal 327 is provided with a blind hole 3271 coaxial with the valve core 334. The valve core 334 is slidably connected to the blind hole 3271. The seal 327 is also provided with a flow hole 3272 connected to the inner cavity of the square tube 325. A third through hole 3251 is provided on the outer side of the square tube 325. The third through hole 3251 is coaxial with the blind hole 3271, and the diameter of the blind hole 3271 is larger than the flow hole 3272.

[0038] When an arc is generated in the electric meter, current is generated in the arc. The current generates an induced magnetic field through the coil 332 in the sealing component 33. The induced magnetic field acts on the magnetic core 333 to generate electromagnetic force. The electromagnetic force overcomes the gravity and friction of the magnetic core 333 itself and the reverse force applied by the first spring 335, etc., and drives the valve core 334 to move out of the blind hole 3271 set in the seal 327. The flow hole 3272 is opened, and the arc extinguishing particles in the storage barrel 321 flow to the seal 327 through the square tube 325 under the action of gravity, and then flow to the storage cavity 35 set in the closing component 31 through the flow hole 3272. The arc extinguishing particles often contain some compounds that can decompose and produce gas at high temperature, such as particles made of certain fluorine-containing polymers, which are solid particles under normal conditions and will decompose a large amount of gas after being heated. The generated gas can quickly blow out the arc, increase the contact area between the arc and the surrounding medium, and accelerate the arc cooling and extinction process.

[0039] The fire extinguishing assembly 4 includes an airbag 41, and a fire extinguishing medium 42 is arranged inside the airbag 41. A plurality of grooves 411 are arranged on the surface of the airbag 41, and the grooves 411 are all arranged toward the meter body 2. When the meter generates an arc, a large amount of heat energy will be released along with the arc, causing the ambient temperature to rise sharply. The airbag 41 is provided with a fire extinguishing medium 42, and the fire extinguishing medium 42 is dry powder or carbon dioxide. These fire extinguishing media 42 have good release performance at high temperatures. The high temperature and high heat environment will cause the fire extinguishing medium 42 to quickly gasify and expand, break through the constraints of the airbag 41, and quickly cover the meter body 2, thereby isolating oxygen, reducing temperature and other fire extinguishing effects. In addition, through the grooves 411 arranged in the airbag 41, these pre-arranged grooves 411 will be broken first to form a release channel for the fire extinguishing medium 42, so that the fire extinguishing medium 42 It can be sprayed to the target area in the expected direction and manner, so that the fire extinguishing medium 42 is concentratedly sprayed toward the fire occurrence area, avoiding disorderly dispersion of the fire extinguishing medium 42, improving the fire extinguishing efficiency, and at the same time roughly limiting the release range of the fire extinguishing medium 42 to ensure that it can effectively act on the area that needs to extinguish the fire without excessive diffusion causing waste or affecting other unnecessary areas. Compared with traditional fire extinguishing medium 42 release methods that rely on the destruction of the overall structure or simply rely on internal pressure to gradually expand, the provision of the groove 411 can allow the airbag 41 to break open quickly after the triggering condition is met, so that the fire extinguishing medium 42 is sprayed out immediately and in a specific direction. This is particularly important when dealing with a rapidly spreading fire, and can allow the fire extinguishing medium 42 to participate in the fire extinguishing process more quickly, thereby gaining precious fire extinguishing time and enhancing the timeliness of fire extinguishing.

[0040] Compared with other conventional electrical signal control methods, the arc extinguishing and fire extinguishing protection of the electric meter can be completed by relying on the characteristics of the arc itself without relying on a complex external control signal transmission process. Once an induced current occurs and is generated, the sealing component 33 can be quickly driven to release arc extinguishing particles. In addition, the large amount of heat energy generated by the arc causes the airbag 41 to expand and rupture rapidly, quickly releasing the fire extinguishing medium 42.

[0041] See attached Figure 6 to Figure 7 The housing 1 also includes a front cover plate 11, a card slot part 112 is fixed at the bottom of the front cover plate 11, a shrink sleeve 111 is fixedly connected to the inner side of the front cover plate 11, the pull rod 319 passes through the front cover plate 11 through the shrink sleeve 111, and the end of the pull rod 319 away from the second sliding plate 315 is engaged with the card slot part 112. A lower cover plate 13 is arranged at the bottom of the front cover plate 11, and a discharge port 131 is opened at the bottom of the lower cover plate 13.

[0042] The material changing assembly 34 includes a pressing piece 341, a plurality of guide plates 3411 are fixedly connected to the top of the pressing piece 341, a guiding inclined surface is provided at one end of the guide plate 3411 close to the second push plate 312, one end of a second spring 342 is fixedly connected to the bottom of the pressing piece 341, the other end of the second spring 342 is fixed to the bottom of the inner side of the outer shell 1, square grooves 3141 are respectively provided on the two inclined surfaces of the triangular chassis 314, the square grooves 3141 are slidably connected to the pressing piece 341, and a discharge groove 3142 connected to the discharge port 131 is provided at the bottom of the triangular chassis 314.

[0043] When the arc extinguishing component needs to be replaced, pull and rotate the pull rod 319 outward to disengage it from the slot 112, and push the pull rod 319 inward, so that the first sliding plate 313 drives the first push plate 311 to slide downward on the inclined surface of the triangular chassis 314, and the second push plate 312 slides downward on the inclined surface of the triangular chassis 314 through the second tooth plate 317, the first tooth plate 316 and the meshing gear 318, while driving the second sliding plate 315 to slide. When the second push plate 312 slides downward onto a plurality of guide plates 3411 with guide slopes, the pressing member 341 is pressed downward, and the arc extinguishing component 3211 in the storage cavity 35 rolls into the discharge groove 3142 through the square groove 3141, and then is discharged to the outside of the outer shell 1 through the discharge port 131 connected to the discharge groove 3142, and the closing assembly 31 is reset, and the operation is performed in reverse sequence, which will not be repeated.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric meter with a protection function, characterized in that: include: A shell (1), an electric meter body (2) is fixedly connected to the cavity of the shell (1), a wiring point (21) is provided at the bottom of the electric meter body (2), an arc extinguishing component (3) is provided outside the wiring point (21), a fire extinguishing component (4) is fixedly connected to the inner wall of the shell (1), and the number of the fire extinguishing components (4) is multiple and distributed around the inside of the electric meter body (2); The arc extinguishing assembly (3) comprises a closing assembly (31), a storage assembly (32), a sealing assembly (33) and a material replacement assembly (34); the wiring point (21) is arranged in the cavity of the closing assembly (31); and the storage assembly (32) is fixedly connected to the outside of the housing (1).

2. The electric meter with protection function according to claim 1, characterized in that: The closing assembly (31) comprises a triangular chassis (314), wherein two inclined surfaces of the triangular chassis (314) are respectively slidably connected with a first push plate (311) and a second push plate (312) which are parallel to each other, wherein a first square groove (3111) is provided on the top of the first push plate (311), wherein a first sliding plate (313) is slidably inserted inside the first square groove (3111), wherein a second square groove (3121) is provided on the top of the second push plate (312), wherein a second sliding plate (315) is slidably inserted inside the second square groove (3121), wherein A first tooth plate (316) and a second tooth plate (317) are correspondingly arranged on both sides of the first sliding plate (313) and the second sliding plate (315); a gear (318) is meshed between the first tooth plate (316) and the second tooth plate (317); a pull rod (319) is rotatably connected to one side of the first sliding plate (313); a first through hole (3151) is opened at the top of the second sliding plate (315); the pull rod (319) is arranged to pass through the first through hole (3151); and a sealing rubber sleeve (36) is fixedly connected to the bottom of the triangular chassis (314).

3. The electric meter with protection function according to claim 2, characterized in that: The storage assembly (32) comprises a storage barrel (321), the storage barrel (321) is fixedly connected to the outside of the housing (1), a funnel (322) is fixedly connected to the top of the storage barrel (321), a third sliding plate (323) is slidably connected to the open end of the funnel (322), the third sliding plate (323) passes through the side wall of the housing (1), a second through hole (3231) is formed on a side of the third sliding plate (323) away from the funnel (322), and a guide rod (3231) is slidably connected to the second through hole (3231). 4), the guide rod (324) is fixedly connected to the electric meter body (2), a return spring (326) is sleeved on the guide rod (324), one end of the return spring (326) is fixedly connected to the electric meter body (2), and the other end of the return spring (326) is fixedly connected to the third sliding plate (323), the bottom of the storage barrel (321) is connected to a square tube (325), the square tube (325) passes through the shell (1) and is connected to the storage cavity (35), and an arc extinguishing member (3211) is arranged in the storage barrel (321).

4. The electric meter with protection function according to claim 3, characterized in that: The sealing assembly (33) is arranged on the outer side of the lower end of the square tube (325), and the sealing assembly (33) comprises a coil fixing part (331), a coil (332) is axially wound on the outer side of the coil fixing part (331), a magnetic core (333) is slidably connected to the inner side of the coil fixing part (331), a valve core (334) is fixedly connected to the bottom end of the magnetic core (333), and a fixing plate (3311) is fixedly connected to the top end of the coil fixing part (331), and the magnetic core (333) and the fixing plate (3311) are elastically connected by a first spring (335).

5. The electric meter with protection function according to claim 4, characterized in that: Two inner plates (12) are provided at the inner bottom of the outer shell (1), a slidably connected closing assembly (31) is provided between the two inner plates (12), a closed storage cavity (35) is formed between the two inner plates (12) and the closing assembly (31), and the wiring point (21) is located in the storage cavity (35).

6. The electric meter with protection function according to claim 5, characterized in that: The housing (1) comprises a front cover plate (11), a slot member (112) is fixedly connected to the bottom of the front cover plate (11), a lower cover plate (13) is arranged at the bottom of the front cover plate (11), and a discharge port (131) is provided at the bottom end of the lower cover plate (13).

7. The electric meter with protection function according to claim 6, characterized in that: A shrink sleeve (111) is fixedly connected to the inner side of the front cover plate (11), and the pull rod (319) is sealed through the shrink sleeve (111) and passes through the front cover plate (11), and one end of the pull rod (319) away from the second sliding plate (315) is snap-connected with the slot member (112).

8. The electric meter with protection function according to claim 7, characterized in that: A sealing member (327) is fixedly connected to the inner side of the lower end of the square tube (325); the sealing member (327) is provided with a blind hole (3271) coaxial with the valve core (334); the valve core (334) is slidably connected to the blind hole (3271); the sealing member (327) is also provided with a flow hole (3272) connected to the inner cavity of the square tube (325); a third through hole (3251) is provided on the outer side of the square tube (325); the third through hole (3251) is coaxial with the blind hole (3271); and the diameter of the blind hole (3271) is larger than the diameter of the flow hole (3272).

9. The electric meter with protection function according to claim 8, characterized in that: The fire extinguishing assembly (4) comprises an air bag (41), a fire extinguishing medium (42) is arranged inside the air bag (41), a plurality of grooves (411) are arranged on the surface of the air bag (41), and the grooves (411) are all arranged towards the electric meter body (2).

10. An electric meter with protection function according to claim 9, characterized in that: The material changing assembly (34) comprises a pressing member (341), a plurality of guide plates (3411) are fixedly connected to the top of the pressing member (341), one end of the guide plate (3411) close to the second push plate (312) is provided with a guiding inclined surface, the bottom of the pressing member (341) is fixedly connected to one end of a second spring (342), the other end of the second spring (342) is fixed to the bottom of the inner side of the shell (1), square grooves (3141) are respectively provided on the two inclined surfaces of the triangular chassis (314), the square grooves (3141) are slidably connected to the pressing member (341), and a discharge groove (3142) connected to the discharge port (131) is provided at the bottom of the triangular chassis (314).

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