CN113092839A - Fixing device of electric energy meter - Google Patents

Fixing device of electric energy meter Download PDF

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Publication number
CN113092839A
CN113092839A CN202110238503.2A CN202110238503A CN113092839A CN 113092839 A CN113092839 A CN 113092839A CN 202110238503 A CN202110238503 A CN 202110238503A CN 113092839 A CN113092839 A CN 113092839A
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China
Prior art keywords
electric energy
energy meter
fixing device
groups
bottom shell
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Granted
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CN202110238503.2A
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Chinese (zh)
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CN113092839B (en
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张军
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Baoding Trillion Micro Software Technology Co ltd
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Individual
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Publication of CN113092839B publication Critical patent/CN113092839B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02Constructional details
    • G01R11/04Housings; Supporting racks; Arrangements of terminals

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

The invention relates to the technical field of fixing devices of electric energy meters, in particular to a fixing device of an electric energy meter, which comprises a fixing device bottom shell, positioning sleeves, electric energy meters, grooves, a plugging cover and fixing piles, wherein four groups of positioning sleeves are symmetrically arranged in the fixing device bottom shell along a central line, the electric energy meters are arranged among the four groups of positioning sleeves, four groups of grooves are symmetrically arranged on two sides of a shell of the electric energy meter, the plugging cover is arranged on one side of the fixing device bottom shell, and four groups of fixing piles are symmetrically arranged on the plugging cover; the electric energy meter slides into the bottom shell along the four groups of sleeve shells, the idler wheels can be extruded by the electric energy meter in the moving process, meanwhile, the idler wheels rotate along with the movement of the electric energy meter, the electric energy meter conveniently slides into the bottom shell, the idler wheels can push the support to move, the support enables the idler wheels to linearly retreat under the matching effect of the sliding rod and the vertical bearing, the first support is provided with a first tension spring, the first support stretches until the idler wheels slide into the grooves, and the electric energy meter is pre-fixed through the resilience of the first spring.

Description

Fixing device of electric energy meter
Technical Field
The invention relates to the technical field of connecting pieces for installing guardrails of fixing devices of electric energy meters, in particular to a fixing device of an electric energy meter.
Background
The intelligent electric meter is one of basic devices for data acquisition of an intelligent power grid (particularly an intelligent power distribution network), undertakes the tasks of original electric energy data acquisition, metering and transmission, is the basis for realizing information integration, analysis optimization and information display, and has strong functionality. Generally, the smart electric meter has a basic power consumption metering function of a traditional electric energy meter, and generally has a bidirectional multi-rate metering function, a user side control function and the like, so that the smart electric meter is widely applied.
When the intelligent electric meter is used, the intelligent electric meter is required to be fixedly installed on a wall body, the intelligent electric meter is generally directly fixed on the wall body through screws, the intelligent electric meter is not installed through a fixing device, a plurality of control buttons or control keys are generally arranged on the intelligent electric meter, the intelligent electric meter is directly installed on the wall body, a control structure cannot be effectively protected, and then the intelligent electric meter is fixed through screws, so that installation and maintenance of the intelligent electric meter by workers are not facilitated.
Disclosure of Invention
The present invention is directed to a fixing device for an electric energy meter, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a fixing device of an electric energy meter comprises a fixing device bottom shell, positioning sleeves, the electric energy meter, grooves, blocking covers and fixing piles, wherein four groups of positioning sleeves are symmetrically arranged in the fixing device bottom shell along a central line, the electric energy meter is arranged between the four groups of positioning sleeves, four groups of grooves are symmetrically arranged on two sides of a shell of the electric energy meter, the blocking covers are arranged on one side of the fixing device bottom shell, and the four groups of fixing piles are symmetrically arranged on the blocking covers;
the fixing device bottom shell comprises a bottom shell, two groups of fixing seats are symmetrically arranged on two sides of the bottom shell, a wire groove is formed in the lower end of the bottom shell along the central line, and four groups of elastic pressing mechanisms are symmetrically arranged in the bottom shell along the central line.
Preferably, the locating sleeve comprises a sleeve, a pressing plate is arranged in the sleeve, a guide pillar is arranged on one side of the pressing plate, and a spring is arranged on the guide pillar.
Preferably, the plugging cover comprises a cover body, a rectangular hole is formed in the cover body, a silica gel pad is arranged in the rectangular hole, and four groups of circular grooves are symmetrically formed in the cover body.
Preferably, the spud pile includes the reference column, and two sets of fixture blocks of reference column one end symmetric connection, the reference column other end set up rotary damper, and the reference column other end passes rotary damper and connects the rotor plate.
Preferably, the suppressing mechanism comprises a roller, the roller is matched with the connecting groove, two sets of rotating shafts are symmetrically arranged at two ends of the roller, bearings are arranged on the rotating shafts, the bearings are embedded into the support, one end of the support is connected with a sliding rod, a vertical bearing is arranged on the sliding rod, the vertical bearing is embedded into the side wall of the bottom shell, one end of the sliding rod penetrates through the vertical bearing and is provided with a first spring, one end of the first spring is fixedly connected with the bottom shell, and the other end of the first.
Preferably, the sleeve includes the sleeve casing, and the built-in mounting hole of sleeve casing, guide pillar one end pass the spring and set up upright bearing, and upright bearing embedding mounting hole bottom sets up two sets of guide ways along the central line symmetry in the mounting hole, fixture block sliding connection guide way, and guide way one end sets up ring groove.
Preferably, the rotating plate comprises a transverse plate, the transverse plate is arranged in the circular groove, the other end of the positioning column penetrates through the rotary damper to be connected with the middle of the transverse plate, two groups of limiting blocks are symmetrically arranged at two ends of the transverse plate along the diagonal line, the limiting blocks are fixedly connected with the side wall of the circular groove, and a rectangular groove is formed in the transverse plate along the central line.
Compared with the prior art, the invention has the beneficial effects that:
1. the electric energy meter fixing device comprises a wire groove, a wire, a support, a first spring, a first fixing device and a second spring, wherein the wire groove is formed in the bottom shell, the first spring is arranged on the support, the second spring is arranged on the support, the first spring is arranged on the support, the second spring is arranged on the;
2. guiding a positioning column at one side of the plugging cover into the mounting hole, moving a clamping block arranged at one end of the positioning column along a guide groove, extruding a pressing plate at one end of the positioning column, linearly retreating the pressing plate under the matching action of the guide column and an upright bearing, compressing a spring until the clamping block moves into an annular clamping groove, then inserting a straight screwdriver into a rectangular groove to rotate a transverse plate, driving the positioning column by the rotation of the transverse plate, clamping the clamping block into the annular clamping groove by the rotation of the positioning column, fixedly connecting the plugging cover with a bottom shell of a fixing device under the action of the rebound force of the spring, thereby realizing the protection effect on the electric energy meter and simultaneously fixing the electric energy meter, rotating the transverse plate to be matched with a limiting block when the plugging cover needs to be opened, separating the plugging cover from the bottom shell of the fixing device under the action of the rebound force of the spring, and setting a positioning sleeve and a fixing pile to realize the protection, meanwhile, the installation and maintenance of the electric energy meter by workers are facilitated;
3. lid and silica gel pad are transparent plastic material, and the staff of being convenient for is fixed the back on the fixing device drain pan to the observation and the operation of electric energy meter, when the shutoff lid, and staff's accessible silica gel pad is operated the button on the electric energy meter, also plays the guard action to the button.
Drawings
FIG. 1 is a front partial cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of FIG. 1A;
FIG. 3 is a side partial cross-sectional view of the structure of the present invention;
FIG. 4 is an enlarged view of FIG. 3B;
fig. 5 is a front view of a structural containment cap of the present invention.
In the figure: the fixing device comprises a fixing device bottom shell 1, a positioning sleeve 2, an electric energy meter 3, a groove 4, a sealing cover 5, a fixing pile 6, a bottom shell 101, a spring 102, a fixing seat 103, a wire groove 104, a pressing plate 201, a spring 202, a sleeve 203, a guide pillar 204, a circular groove 501, a cover 502, a rectangular hole 503, a silica gel pad 504, a clamping block 601, a positioning column 602, a rotary damper 603, a rotary plate 604, a roller 1021, a bracket 1022, a 1023 sliding rod, a first spring 1024, a rotating shaft 1025, a sleeve 2031 shell, a 2032 mounting hole, a 2033 annular clamping groove, a 2034 guide groove, a 6041 limiting block, a 6042 rectangular groove and a 6043 transverse plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Referring to fig. 1 to 5, the present invention provides a technical solution: a fixing device of an electric energy meter comprises a fixing device bottom shell 1, positioning sleeves 2, an electric energy meter 3, grooves 4, a blocking cover 5 and fixing piles 6, wherein four groups of positioning sleeves 2 are symmetrically arranged in the fixing device bottom shell 1 along a central line, the electric energy meter 3 is arranged between the four groups of positioning sleeves 2, four groups of grooves 4 are symmetrically arranged on two sides of a shell of the electric energy meter 3, the blocking cover 5 is arranged on one side of the fixing device bottom shell 1, four groups of fixing piles 6 are symmetrically arranged on the blocking cover 5, the fixing device bottom shell 1 comprises a bottom shell 101, two groups of fixing seats 103 are symmetrically arranged on two sides of the bottom shell 101, a line groove 104 is arranged at the lower end of the bottom shell 101 along the central line, four groups of elastic pressing mechanisms 102 are symmetrically arranged in the bottom shell 101 along the central line, each elastic pressing mechanism 102 comprises a roller 1021, the roller 1021 is matched and connected with the grooves 4, two groups of rotating shafts, the sliding rod 1023 is provided with a vertical bearing, the vertical bearing is embedded in the side wall of the bottom shell 101, one end of the sliding rod 1023 penetrates through the vertical bearing to be provided with a spring I1024, one end of the spring I1024 is fixedly connected with the bottom shell 101, the other end of the spring I1024 is fixedly connected with the end part of the sliding rod 1023, a worker can connect an electric wire into the electric energy meter 3 through the wire groove 104, when the electric energy meter 3 needs to be installed, the electric energy meter 3 slides into the bottom shell 101 along four groups of sleeve shells 2031, the electric energy meter 3 can press the roller 1021 in the moving process, meanwhile, the roller 1021 rotates along with the movement of the electric energy meter 3, the electric energy meter 3 conveniently slides into the bottom shell 101, the roller 1022 can push the support 1022 to move, the support 1022 enables the roller 1021 to linearly retreat under the matching effect of the sliding rod 1023 and the vertical bearing, the support 1022 stretches the spring I1024 until the roller 1021 slides into the groove 4, therefore, the wiring of the electric energy meter 3 by workers is facilitated, the bottom shell 1 of the fixing device is set, on one hand, the electric energy meter 3 is protected, on the other hand, the installation and the disassembly of the electric energy meter 3 by the workers are facilitated, and the working efficiency of the workers is improved;
further, the positioning sleeve 2 includes a sleeve 203, a pressing plate 201 is disposed in the sleeve 203, a guide post 204 is disposed on one side of the pressing plate 201, a spring 202 is disposed on the guide post 204, the sleeve 203 includes a sleeve housing 2031, a mounting hole 2032 is disposed in the sleeve housing 2031, one end of the guide post 204 passes through the spring 202 and is provided with a vertical bearing, the vertical bearing is embedded into the bottom of the mounting hole 2032, two sets of guide grooves 2034 are symmetrically disposed along a central line in the mounting hole 2032, the fixture blocks 601 are slidably connected to the guide grooves 2034, one end of the guide grooves 2034 is provided with an annular slot 2033, the fixing pile 6 includes a positioning post 602, one end of the positioning post 602 is symmetrically connected to two sets of fixture blocks 602, the other end of the positioning post 602 is provided with a rotary damper 603, the other end of the positioning post 602 passes through the rotary damper 603 and is connected to the rotating plate 604, the rotating plate 604 includes a horizontal plate 6043, a, a limiting block 6041 is fixedly connected with the side wall of the circular groove 501, a rectangular groove 6042 is arranged on the transverse plate 6043 along the central line, when the wiring of the electric energy meter 3 is finished, the positioning column 602 on one side of the blocking cover 5 is guided into the mounting hole 2032, a clamping block 601 arranged at one end of the positioning column 602 moves along the guide groove 2034, one end of the positioning column 602 presses the pressing plate 201, the pressing plate 201 linearly retreats under the matching action of the guide column 204 and the vertical bearing, the spring 202 is compressed until the clamping block 601 moves into the annular clamping groove 2033, then a straight screwdriver is inserted into the rectangular groove 6042 to rotate the transverse plate 6043, the rotation of the transverse plate 6043 drives the positioning column 602, the rotation of the positioning column 602 enables the clamping block 601 to be clamped into the annular clamping groove 2033, under the reverse elasticity of the spring 202, the blocking cover 5 is fixedly connected with the fixing device bottom shell 1, thereby not only realizing the protection effect on the electric energy meter 3, the transverse plate 6043 is rotated to be matched with the limit block 6041, the blocking cover 5 is separated from the bottom shell 1 of the fixing device under the action of the rebounding force of the spring 202, and the setting of the positioning sleeve 2 and the fixing pile 6 is integrated, so that the protection effect on the electric energy meter 3 is realized, and meanwhile, the installation and maintenance of the electric energy meter 3 by workers are facilitated;
further, blocking lid 5 includes lid 502, sets up rectangular hole 503 on the lid 502, sets up silicon rubber pad 504 in the rectangular hole 503, and the symmetry sets up four groups of circular slots 501 on the lid 502, and wherein lid 502 and silicon rubber pad 504 are transparent plastic material, and the staff of being convenient for is operated the observation of electric energy meter 3 with the operation, and when blocking lid 5 fixed back on fixing device drain pan 1, staff's accessible silicon rubber pad 504 operates the button on the electric energy meter 3, also plays the guard action to the button.
The working principle is as follows: in the using process, when the electric energy meter 3 needs to be installed, the electric energy meter 3 slides into the bottom case 101 along the four sets of sleeve housings 2031, the roller 1021 is pressed during the moving process of the electric energy meter 3, meanwhile, the roller 1021 rotates along with the movement of the electric energy meter 3, so that the electric energy meter 3 slides into the bottom case 101 conveniently, the roller 1021 pushes the support 1022 to move, the support 1022 enables the roller 1021 to linearly retreat under the matching action of the slide bar 1023 and the upright bearing, the support 1022 stretches the first spring 1024 until the roller 1021 slides into the groove 4, the electric energy meter 3 is pre-fixed through the resilience of the first spring 1024, the electric energy meter 3 is wired completely, the positioning column 602 on one side of the blocking cover 5 is guided into the installation hole 2032, the fixture block 601 arranged at one end of the positioning column 602 moves along the guide groove 2034, meanwhile, one end of the positioning column 602 presses the pressure plate 201, the pressure plate 201 linearly retreats under the matching action, and the spring 202 is compressed until the fixture block 601 moves into the circular clamping groove 2033, then a straight screwdriver is inserted into the rectangular groove 6042 to rotate the horizontal plate 6043, the rotation of the horizontal plate 6043 drives the positioning column 602, the rotation of the positioning column 602 enables the fixture block 601 to be clamped into the circular clamping groove 2033, and under the action of the rebound force of the spring 202, the blocking cover 5 is fixedly connected with the bottom shell 1 of the fixing device.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a fixing device of electric energy meter, includes fixing device drain pan (1), position sleeve (2), electric energy meter (3), recess (4), shutoff lid (5), spud pile (6), its characterized in that: four groups of positioning sleeves (2) are symmetrically arranged in the fixing device bottom shell (1) along the central line, an electric energy meter (3) is arranged between the four groups of positioning sleeves (2), four groups of grooves (4) are symmetrically arranged on two sides of the shell of the electric energy meter (3), a plugging cover (5) is arranged on one side of the fixing device bottom shell (1), and four groups of fixing piles (6) are symmetrically arranged on the plugging cover (5);
the fixing device bottom shell (1) comprises a bottom shell (101), two groups of fixing seats (103) are symmetrically arranged on two sides of the bottom shell (101), a wire groove (104) is formed in the lower end of the bottom shell (101) along the central line, and four groups of elastic pressing mechanisms (102) are symmetrically arranged in the bottom shell (101) along the central line.
2. An electric energy meter fixing device according to claim 1, characterized in that: the locating sleeve (2) comprises a sleeve (203), a pressing plate (201) is arranged in the sleeve (203), a guide pillar (204) is arranged on one side of the pressing plate (201), and a spring (202) is arranged on the guide pillar (204).
3. An electric energy meter fixing device according to claim 1, characterized in that: the blocking cover (5) comprises a cover body (502), a rectangular hole (503) is formed in the cover body (502), a silica gel pad (504) is arranged in the rectangular hole (503), and four groups of circular grooves (501) are symmetrically formed in the cover body (502).
4. An electric energy meter fixing device according to claim 1, characterized in that: the fixing pile (6) comprises a positioning column (602), one end of the positioning column (602) is symmetrically connected with two groups of clamping blocks (602), the other end of the positioning column (602) is provided with a rotary damper (603), and the other end of the positioning column (602) penetrates through the rotary damper (603) to be connected with a rotating plate (604).
5. An electric energy meter fixing device according to claim 1, characterized in that: the spring pressing mechanism (102) comprises a roller (1021), the roller (1021) is matched with a connecting groove (4), two sets of rotating shafts (1025) are symmetrically arranged at two ends of the roller (1021), bearings are arranged on the rotating shafts (1025), the bearings are embedded into a support (1022), one end of the support (1022) is connected with a sliding rod (1023), a vertical bearing is arranged on the sliding rod (1023), the vertical bearing is embedded into a side wall of the bottom shell (101), one end of the sliding rod (1023) passes through the vertical bearing to be provided with a first spring (1024), one end of the first spring (1024) is fixedly connected with the bottom shell (101), and the other end of the first spring (1024) is fixedly connected with a sliding rod (1023) end part.
6. An electric energy meter fixing device according to claim 2, characterized in that: the sleeve (203) comprises a sleeve shell (2031), a mounting hole (2032) is formed in the sleeve shell (2031), one end of the guide post (204) penetrates through the spring (202) to be provided with an upright bearing, the upright bearing is embedded into the bottom of the mounting hole (2032), two groups of guide grooves (2034) are symmetrically formed in the mounting hole (2032) along the center line, the clamping block (601) is in sliding connection with the guide grooves (2034), and one end of each guide groove (2034) is provided with an annular clamping groove (2033).
7. An electric energy meter fixing device according to claim 4, characterized in that: the rotor plate (604) includes diaphragm (6043), set up diaphragm (6043) in circular slot (501), reference column (602) other end passes rotary damper (602) and is connected with diaphragm (6043) middle part, diaphragm (6043) both ends set up two sets of stopper (6041) along diagonal symmetry, stopper (6041) fixed connection circular slot (501) lateral wall, set up rectangular channel (6042) along the central line on diaphragm (6043).
CN202110238503.2A 2021-03-04 2021-03-04 Fixing device of electric energy meter Active CN113092839B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110238503.2A CN113092839B (en) 2021-03-04 2021-03-04 Fixing device of electric energy meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110238503.2A CN113092839B (en) 2021-03-04 2021-03-04 Fixing device of electric energy meter

Publications (2)

Publication Number Publication Date
CN113092839A true CN113092839A (en) 2021-07-09
CN113092839B CN113092839B (en) 2023-10-17

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CN202110238503.2A Active CN113092839B (en) 2021-03-04 2021-03-04 Fixing device of electric energy meter

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Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201974449U (en) * 2011-03-16 2011-09-14 卢爱君 Three-phase intelligent electric-energy meter
WO2013078748A1 (en) * 2011-11-28 2013-06-06 东莞市怡丰锁业有限公司 Key cipher lock
CN204515118U (en) * 2015-01-23 2015-07-29 海盐盛迪电子科技有限公司 Electric energy meter detection positioning module
CN105116189A (en) * 2015-10-08 2015-12-02 莱芜鲁能开源集团电器有限公司 Rapid installation and fixing frame for electric energy meter
CN205581170U (en) * 2016-03-16 2016-09-14 浙江天普胜电气有限公司 Electric energy meter
CN206440752U (en) * 2017-01-29 2017-08-25 国网新疆电力公司电力科学研究院 A kind of electric energy meter easy for removal and installation
CN108644216A (en) * 2018-04-28 2018-10-12 北京机械设备研究所 It is a kind of not fall off screw assembly with locking functions
CN208421019U (en) * 2018-07-19 2019-01-22 宁波迦南智能电气股份有限公司 A kind of electric energy meter easy for installation
CN208697765U (en) * 2018-09-10 2019-04-05 上饶市双龙光学模具制造有限公司 A kind of optical mirror slip processing optical mould with positioning function
CN208879412U (en) * 2018-08-08 2019-05-21 铜陵市联创标准表箱制作有限责任公司 A kind of ammeter box timber plate-folding device
CN209728010U (en) * 2018-11-30 2019-12-03 江苏祥华科技有限公司 A kind of radiator structure of electric energy meter shell
CN110711724A (en) * 2019-10-17 2020-01-21 李美冬 Transparent ammeter box
CN210109177U (en) * 2019-05-30 2020-02-21 四川中威能电力科技有限公司 Direct current cost control intelligent electric energy meter
CN210572446U (en) * 2019-08-27 2020-05-19 合肥迪美电子科技有限公司 Fixing device for smart electric meter
CN210693027U (en) * 2019-11-08 2020-06-05 天津津通华电气设备有限公司 Intelligent power distribution box with protection function

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201974449U (en) * 2011-03-16 2011-09-14 卢爱君 Three-phase intelligent electric-energy meter
WO2013078748A1 (en) * 2011-11-28 2013-06-06 东莞市怡丰锁业有限公司 Key cipher lock
CN204515118U (en) * 2015-01-23 2015-07-29 海盐盛迪电子科技有限公司 Electric energy meter detection positioning module
CN105116189A (en) * 2015-10-08 2015-12-02 莱芜鲁能开源集团电器有限公司 Rapid installation and fixing frame for electric energy meter
CN205581170U (en) * 2016-03-16 2016-09-14 浙江天普胜电气有限公司 Electric energy meter
CN206440752U (en) * 2017-01-29 2017-08-25 国网新疆电力公司电力科学研究院 A kind of electric energy meter easy for removal and installation
CN108644216A (en) * 2018-04-28 2018-10-12 北京机械设备研究所 It is a kind of not fall off screw assembly with locking functions
CN208421019U (en) * 2018-07-19 2019-01-22 宁波迦南智能电气股份有限公司 A kind of electric energy meter easy for installation
CN208879412U (en) * 2018-08-08 2019-05-21 铜陵市联创标准表箱制作有限责任公司 A kind of ammeter box timber plate-folding device
CN208697765U (en) * 2018-09-10 2019-04-05 上饶市双龙光学模具制造有限公司 A kind of optical mirror slip processing optical mould with positioning function
CN209728010U (en) * 2018-11-30 2019-12-03 江苏祥华科技有限公司 A kind of radiator structure of electric energy meter shell
CN210109177U (en) * 2019-05-30 2020-02-21 四川中威能电力科技有限公司 Direct current cost control intelligent electric energy meter
CN210572446U (en) * 2019-08-27 2020-05-19 合肥迪美电子科技有限公司 Fixing device for smart electric meter
CN110711724A (en) * 2019-10-17 2020-01-21 李美冬 Transparent ammeter box
CN210693027U (en) * 2019-11-08 2020-06-05 天津津通华电气设备有限公司 Intelligent power distribution box with protection function

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