CN112051537A - Electric energy meter seal quick disassembly cooperation structure - Google Patents
Electric energy meter seal quick disassembly cooperation structure Download PDFInfo
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- CN112051537A CN112051537A CN202010929613.9A CN202010929613A CN112051537A CN 112051537 A CN112051537 A CN 112051537A CN 202010929613 A CN202010929613 A CN 202010929613A CN 112051537 A CN112051537 A CN 112051537A
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- iron
- energy meter
- guide shell
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 178
- 229910052742 iron Inorganic materials 0.000 claims abstract description 89
- 230000006835 compression Effects 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 35
- 238000002844 melting Methods 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 238000005476 soldering Methods 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims description 12
- 239000000899 Gutta-Percha Substances 0.000 claims description 4
- 239000004831 Hot glue Substances 0.000 claims description 4
- 240000000342 Palaquium gutta Species 0.000 claims description 4
- 229920000588 gutta-percha Polymers 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 8
- 206010053615 Thermal burn Diseases 0.000 abstract description 4
- 239000003566 sealing material Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gasket Seals (AREA)
Abstract
The application provides a cooperation structure is disassembled fast to electric energy meter seal, include: disassembling the device and sealing; the disassembling device comprises a guide shell, a branding iron column, a heater, a cache block and a compression block; the guide shell is strip-shaped, and a cavity which runs through the upper end and the lower end of the guide shell along the length direction is formed in the guide shell; the iron post is arranged in the cavity in a sliding mode along the through direction of the cavity, the head of the iron post corresponds to the lower port of the cavity, and the tail of the iron post corresponds to the upper port of the cavity; the heater is connected with the soldering iron column; the buffer block is arranged at the tail part of the iron post; the compression block is connected with the cache block, and the tail end of the compression block extends out of the upper end of the cavity; the sealing material is a plastic material with a melting point of 80 ℃. The application solves the technical problems that the PC seal dismounting method is too low in efficiency, the electric soldering iron easily scalds workers, certain potential safety hazards are caused, and melted seal head slurry easily damages the surface shell.
Description
Technical Field
The application relates to the technical field of electric energy metering equipment detection, in particular to a quick disassembling and matching structure for electric energy meter seals.
Background
Every year, grid companies will remove a large number of meters for various reasons. In order to avoid resource waste, reduce the cost of the electric energy meter in the whole life cycle and exert the efficiency of the electric energy meter in the life cycle to the maximum extent, a power grid company can sort and detect the disassembled returned electric energy meter and confirm whether the function of the returned electric energy meter still meets the technical requirements and can be recycled.
In recent years, millions of returned electric energy meters need to be sorted every year, most of the electric energy meters can be reused after being maintained, two seals of the electric energy meters need to be removed when the electric energy meters are maintained, and most of the seals popular in the market are PC seals.
PC seal is with low costs, simple to operate, and accessible automatic equipment is automatic installs the seal head on the seal nail, and the seal back-off through the seal head is used for the back-off on seal nail recess, and the PC seal appears and just takes the market rapidly soon, becomes the mainstream in market. In the process of meter dismounting and maintenance, a large number of seals need to be dismounted, and the aim is to dismount the meter shell to maintain the circuit board. The traditional manual dismantling method comprises the following steps: one person will use electric iron to brand a hole with the seal earlier, and the seal still back-off at this moment is on the recess of seal nail, need another person to reach seal nail cross head department through the entrance to a cave, the screwdriver is reversed, will seal the nail, then break off the seal again with fingers and thumb, however, this kind of dismantlement method efficiency is low excessively, the electric iron scalds the staff very easily, has certain potential safety hazard, and, because the melting point of PC seal head is 120 ℃, the same with the melting point of electric energy meter watchcase, if the casing department of electric energy meter is located to the thick liquid of the seal head that has melted, then cause the damage to the watchcase very easily.
Disclosure of Invention
An object of this application provides a cooperation structure is disassembled fast to electric energy meter seal, solves the dismantlement method efficiency of PC seal head and crosses lowly, and the staff is scalded very easily to the electric iron, has certain potential safety hazard to, the first thick liquid of seal that has melted causes the technical problem of damage to the watchcase easily.
In view of this, the application provides a quick cooperation structure of disassembling of electric energy meter seal, includes: disassembling the device and sealing;
the disassembling device comprises a guide shell, a branding iron column, a heater, a cache block and a compression block;
the guide shell is in a strip shape, and a cavity penetrating through the upper end and the lower end of the guide shell along the length direction is formed in the guide shell;
the iron column is arranged in the cavity in a sliding mode along the through direction of the cavity, the head of the iron column corresponds to the lower port of the cavity, and the tail of the iron column corresponds to the upper port of the cavity;
the heater is connected with the soldering iron column;
the cache block is arranged at the tail part of the iron post;
the compression block is connected with the cache block, and the tail end of the compression block extends out of the upper end of the cavity;
the seal is made of plastic materials with the melting point of 80 ℃.
Further, a partition board is arranged in the cavity, and the partition board divides the cavity into a first cavity and a second cavity;
the head of the iron post is positioned in the first cavity, and the tail of the iron post and the heater are positioned in the second cavity;
the vacuum pumping pipe is communicated with the first cavity and the outside of the guide shell.
Furthermore, the plastic material is prepared by mixing gutta-percha with the melting point of 50 ℃ and hot melt adhesive with the melting point of 100 ℃.
Furthermore, a pipe orifice of the vacuumizing pipe is connected with a vacuum machine.
Further, a spring is arranged between the lower port of the cavity and the head area of the iron post.
Furthermore, a groove boss is arranged on the cavity part corresponding to the cache block;
the groove boss is matched with the cache block.
Furthermore, the outer wall surface of the lower end of the guide shell is provided with an annular boss in a surrounding mode.
Further, the caliber of the lower port part of the cavity is gradually enlarged from top to bottom.
Compared with the prior art, the embodiment of the application has the advantages that:
the application provides a cooperation structure is disassembled fast to electric energy meter seal, include: disassembling the device and sealing; the disassembling device comprises a guide shell, a branding iron column, a heater, a cache block and a compression block; the guide shell is in a strip shape, and a cavity penetrating through the upper end and the lower end of the guide shell along the length direction is formed in the guide shell; the iron column is arranged in the cavity in a sliding mode along the through direction of the cavity, the head of the iron column corresponds to the lower port of the cavity, and the tail of the iron column corresponds to the upper port of the cavity; the heater is connected with the soldering iron column; the cache block is arranged at the tail part of the iron post; the compression block is connected with the cache block, and the tail end of the compression block extends out of the upper end of the cavity; the seal is made of plastic materials with the melting point of 80 ℃.
The utility model provides a quick disassembly cooperation structure of electric energy meter seal, including detaching device and seal head, detaching device includes the direction shell, iron post, a heater, buffer block and compression block, the iron post slides and sets up in the cavity of direction shell, iron post's afterbody is connected with buffer block, buffer block and compression block are connected, thereby through pressing the compression block, make the compression block promote the iron post through buffer block and stretch out in the lower port of cavity, realize iron post's quick flexible, be connected with the heater on iron post, heat iron post through the heater, make the temperature of iron post reach the temperature that can melt seal plastics, thereby melt seal into liquid fast, reach the purpose of demolising the seal, the direction shell has played good guard action in operation process, avoid operating personnel direct contact to iron post to cause the scald, use after accomplishing to stretch into the cavity of direction shell the iron post into can, need not directly to adopt the electric iron to heat again, realize iron post fast butt seal and quick playback through pressing the compression piece, thereby improved removal efficiency again when having guaranteed the security, be the seal head of 80 ℃ of plastic material making through adopting the melting point, the temperature that makes iron post that irons only need reach 80 ℃ alright melt the seal head, the seal head thick liquid that obtains that melts can not cause the damage to the watchcase of electric energy meter, thereby this application has solved PC seal demolish method efficiency and has crossed low excessively, the staff is scalded very easily to the electric iron, certain potential safety hazard has, and, the seal head thick liquid that has melted causes the technical problem of damage to the watchcase easily.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a quick seal disassembly and assembly structure of an electric energy meter according to an embodiment of the present application;
FIG. 2 is a front view of a seal head in an embodiment of the present application;
FIG. 3 is a front view of a seal pin in an embodiment of the present application;
FIG. 4 is a front view of an electric energy meter in an embodiment of the present application;
wherein the reference numerals are: the soldering iron comprises a guide shell 1, a soldering iron column 2, a heater 3, a buffer block 4, a compression block 5, a vacuumizing pipe 6, a partition plate 7, a first cavity 8, a second cavity 9, a spring 10, a groove boss 11, an annular boss 12 and a seal head 13.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
For convenience of understanding, please refer to fig. 1 to 4, fig. 1 is a schematic structural diagram of a fast disassembling and matching structure of an electric energy meter seal according to an embodiment of the present application; FIG. 2 is a front view of a seal head in an embodiment of the present application; FIG. 3 is a front view of a seal pin in an embodiment of the present application; fig. 4 is a front view of an electric energy meter in an embodiment of the present application.
The utility model provides a quick cooperation structure of disassembling of electric energy meter seal that provides in this application includes: a disassembling device and a seal head 13;
the disassembling device comprises a guide shell 1, a soldering iron column 2, a heater 3, a buffer block 4 and a compression block 5;
the guide shell 1 is strip-shaped, and a cavity which runs through the upper end and the lower end of the guide shell 1 along the length direction is formed in the guide shell 1;
the iron post 2 is arranged in the cavity in a sliding mode along the through direction of the cavity, the head of the iron post 2 corresponds to the lower port of the cavity, and the tail of the iron post 2 corresponds to the upper port of the cavity;
the heater 3 is connected with the iron post 2;
the buffer block 4 is arranged at the tail part of the iron post 2;
the compression block 5 is connected with the cache block 4, and the tail end of the compression block 5 extends out of the upper end of the cavity;
the material of the seal head 13 is a plastic material with a melting point of 80 ℃.
It should be noted that the guide shell 1 is a long-strip column, the circular axis center of the guide shell 1 is provided with cavities at the upper and lower ends of the pipeline guide shell 1 along the length direction, the cavities are cylindrical cavities, the guide shell 1 is made of heat-resistant material and has good heat-insulating property, so that the danger caused by the fact that the temperature of the guide shell 1 is too high due to the heat conduction of the iron burning column 2 is avoided, the diameter of the cavity is slightly larger than that of the iron burning column 2, and the iron burning column 2 can slide relative to the cavities and along the length direction.
The heater 3 sets up on iron prop 2, and the heating source of heater 3 is connected with iron prop 2, and its heating source is located iron prop 2's back half section, has seted up the electric wire hole on the position that leads shell 1 and correspond to heater 3, and the wire of heater 3 is worn out to leading shell 1 outside and is connected with the power through this electric wire hole, and heater 3 is used for heating iron prop 2.
The plastic material is prepared by mixing gutta percha with a melting point of 50 ℃ and EVA hot melt adhesive with a melting point of 100 ℃, because the melting point of the existing PC seal head is 120 ℃, on one hand, more electric energy is needed to heat the electric iron, the heating time is too long, and on the other hand, the melted seal head slurry also has the possibility of damaging the shell of the electric energy meter, therefore, the plastic material with certain hardness and elasticity and a melting point of 80 ℃ is obtained by replacing the material of the seal head 13 and mixing the gutta percha with higher hardness and the hot melt adhesive with a melting point of 50 ℃ and higher elasticity; the plastic material is adopted to replace the material of the seal head in the prior art, so that the melting point of the manufactured seal head 13 is 80 ℃, and the seal head can be melted only by heating the soldering iron column 2 to 80 ℃, so that the time for heating and warming the soldering iron column 2 by the heater 3 is reduced, and the table cannot be damaged even if the melted seal head slurry flows onto the meter shell of the electric energy meter carelessly.
The utility model provides a quick disassembly cooperation structure of electric energy meter seal, including detaching device and seal head 13, detaching device includes direction shell 1, flatiron post 2, heater 3, buffer block 4 and compression block 5, flatiron post 2 slides and sets up in the cavity of direction shell 1, the afterbody of flatiron post 2 is connected with buffer block 4, buffer block 4 is connected with compression block 5, thereby through pressing compression block 5, make compression block 5 promote flatiron post 2 to stretch out in the lower port of cavity through buffer block 4, realize the quick flexible of flatiron post 2, be connected with heater 3 on flatiron post 2, heat flatiron post 2 through heater 3, make the temperature of flatiron post 2 reach the plastics of chemical seal head 13, thereby melt seal head 13 fast to the liquid state, make seal head 13 break away from the seal nail, reach the purpose of demolising seal head 13, direction shell 1 has played good guard action in operation, avoid operating personnel direct contact to flatiron post 2 to cause the scald, use after the completion with flatiron post 2 stretch into to the cavity of direction shell 1 can, need not directly to adopt the electric iron to heat again, realize the quick butt of electric iron through pressing compression piece 5 and seal printer head 13 and quick playback, thereby improved again when having guaranteed the security and demolish efficiency, the method efficiency of demolising of having solved PC and sealed printer head is low excessively, the staff is scalded very easily to the electric iron, certain potential safety hazard has, and, the sealed printer head thick liquid that has melted causes the technical problem of damage to the watch shell easily.
As a further improvement, a vacuumizing tube 6 is arranged on the side surface of the guide shell 1 of the electric energy meter seal quick disassembling and matching structure provided by the embodiment of the application;
the evacuation tube 6 communicates the cavity with the outside of the guide housing 1.
Specifically, in the existing PC sealing head, the melting point of the sealing head is 120 ℃, the melting point of the case of the electric energy meter is 120 ℃, and when the formed slurry flows to the case of the electric energy meter after the sealing head is melted, the case of the electric energy meter is easily damaged, therefore, in the embodiment, the vacuum pipe 6 is arranged on the side surface of the guide case 1, and the vacuum pipe 6 is communicated with the outside of the guide case 1 and the cavity, so that only a vacuum machine needs to be arranged at the vacuum pipe 6 to form a negative pressure environment in the cavity, and the sealing head slurry melted near the lower port of the cavity can be sucked away immediately, thereby preventing the sealing head slurry from flowing to the case of the electric energy meter, and effectively protecting the case.
As a further improvement, a partition plate 7 is arranged in a cavity of the electric energy meter seal quick disassembling and matching structure, and the partition plate 7 divides the cavity into a first cavity 8 and a second cavity 9;
the head part of the iron post 2 is positioned in the first cavity 8, and the tail part of the iron post 2 and the heater 3 are positioned in the second cavity 9;
the evacuation tube 6 communicates the first cavity 8 with the exterior of the guide housing 1.
Particularly, a partition plate 7 is arranged in the cavity, the partition plate 7 is used for dividing the cavity into a first cavity 8 and a second cavity 9, the first cavity 8 is located below the second cavity 9 is located above the first cavity, a through hole is formed in the center of the partition plate 7, and the diameter of the through hole is larger than that of the iron column 2, so that the iron column 2 can penetrate through the through hole, the partition plate 7 can be used for preventing the heater 3 from falling off on one hand, and on the other hand, the partition plate can be used for preventing sealing head slurry pumped out from the lower port of the cavity from a vacuumizing port from entering the heater 3 and damaging the heater 3.
As a further improvement, the mouth of the vacuum tube 6 of the electric energy meter sealing quick disassembling and matching structure is connected with a vacuum machine.
As a further modification, a spring 10 is disposed between the lower port of the cavity of the electric energy meter sealing quick-disassembling and matching structure and the head region of the soldering iron column 2.
Particularly, the cavity is close to the position in port down and is provided with first screens, the one end fixing clip of spring 10 is located on this first screens, iron column 2's the one end that is close to in the head region is provided with the second screens, spring 10's other end fixing clip is located on this second screens, thereby press iron column 2 down when compressing block 5, need overcome certain spring 10 power, when stopping to press compressing block 5, 2 self return to the cavity of iron column under the effect of spring 10 power, avoid scalding the staff.
As a further improvement, a groove boss 11 is arranged on a cavity part corresponding to the cache block 4 of the electric energy meter seal quick disassembling and matching structure provided by the embodiment of the application, the groove and the ridge are matched with the buffer block 4, so that when the compression block 5 presses the buffer block 4, the buffer block 4 moves downwards, due to the action of the spring 10, when the compression block 5 stops being pressed, the force of the spring 10 can push the iron column 2 reversely, so that the buffer block 4 is clamped on the groove boss 11, the iron column 2 stops moving upwards, the head part of the iron column 2 is in a state of extending out of the lower port of the cavity, can be used for heating the seal head 13, when the use is finished, the buffer block is separated from the groove boss 11 by pressing the compression block 5, at this time, the compression block 5 is stopped being pressed, the iron column 2 is reset under the action of the force of the spring 10, so that the head part of the iron column 2 is retracted into the cavity.
As a further improvement, the outer face of the lower end of the guide shell 1 of the electric energy meter seal quick-disassembling matching structure provided by the embodiment of the application is provided with an annular boss 12 in a surrounding manner. The annular boss 12 is arranged, so that a worker can better hold the lower end of the guide shell 1 to keep the guide shell stable.
As a further improvement, the aperture of the lower port portion of the cavity of the electric energy meter seal quick-disassembling matching structure provided by the embodiment of the application is gradually enlarged from top to bottom, so that the aperture of the port is larger at a position closer to the seal head 13, and the absorption of the seal head slurry is more facilitated.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. The utility model provides an electric energy meter seal is disassembled cooperation structure fast, its characterized in that includes: disassembling the device and the seal head;
the disassembling device comprises a guide shell, a branding iron column, a heater, a cache block and a compression block;
the guide shell is in a strip shape, and a cavity penetrating through the upper end and the lower end of the guide shell along the length direction is formed in the guide shell;
the iron column is arranged in the cavity in a sliding mode along the through direction of the cavity, the head of the iron column corresponds to the lower port of the cavity, and the tail of the iron column corresponds to the upper port of the cavity;
the heater is connected with the soldering iron column;
the cache block is arranged at the tail part of the iron post;
the compression block is connected with the cache block, and the tail end of the compression block extends out of the upper end of the cavity;
the material of the seal printing head is plastic material with the melting point of 80 ℃.
2. The electric energy meter seal rapid disassembly and assembly structure of claim 1, wherein a vacuum-pumping tube is provided on a side surface of the guide shell;
the vacuum tube is communicated with the cavity and the outside of the guide shell.
3. The electric energy meter seal quick disassembling and assembling structure according to claim 2, wherein a partition is disposed in the cavity, and the partition divides the cavity into a first cavity and a second cavity;
the head of the iron post is positioned in the first cavity, and the tail of the iron post and the heater are positioned in the second cavity;
the vacuum pumping pipe is communicated with the first cavity and the outside of the guide shell.
4. The electric energy meter seal rapid disassembly and assembly structure of claim 1, wherein the plastic material is prepared by mixing gutta percha with a melting point of 50 ℃ and EVA hot melt adhesive with a melting point of 100 ℃.
5. The electric energy meter seal rapid disassembly and assembly structure of claim 3, wherein the mouth of the vacuum tube is connected with a vacuum machine.
6. The electric energy meter seal quick-dismantling mating structure as set forth in claim 1, wherein a spring is disposed between a lower port of said cavity and a head region of said branding iron column.
7. The electric energy meter seal quick disassembling and assembling structure according to claim 6, wherein a groove boss is provided on a cavity portion corresponding to the cache block;
the groove boss is matched with the cache block.
8. The electric energy meter seal quick disassembling matching structure according to claim 1, wherein the lower end outer wall surface of the guide shell is provided with an annular boss in a surrounding manner.
9. The electric energy meter seal quick disassembling matching structure according to claim 2, wherein the caliber of the lower port part of the cavity is gradually enlarged from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929613.9A CN112051537A (en) | 2020-09-07 | 2020-09-07 | Electric energy meter seal quick disassembly cooperation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929613.9A CN112051537A (en) | 2020-09-07 | 2020-09-07 | Electric energy meter seal quick disassembly cooperation structure |
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| CN112051537A true CN112051537A (en) | 2020-12-08 |
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| CN202010929613.9A Pending CN112051537A (en) | 2020-09-07 | 2020-09-07 | Electric energy meter seal quick disassembly cooperation structure |
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Application publication date: 20201208 |