An intelligent electric energy meter with overload protection device

Abstract

The present invention relates to the field of electric power engineering technology, specifically, an intelligent electric energy meter with an overload protection device, including an electric meter box, an integrated chip, a terminal block, an outer cover and a counter, wherein the integrated chip is installed in the inner cavity of the electric meter box, the terminal block is installed at the bottom of the electric meter box, the outer cover is installed at the front of the electric meter box, the counter is installed at the top of the front of the outer cover, and the counter is electrically connected to the integrated chip, and is characterized in that it also includes an overload protection mechanism and a classification mechanism, wherein the overload protection mechanism is installed on the right side of the inner cavity of the electric meter box, and the classification mechanism is installed at the bottom of the front of the outer cover; the first box body is installed on the right side of the inner cavity of the electric meter box; and the opening and closing assembly is fixedly connected to the top of the inner cavity of the first box body. The purpose of overload protection is achieved, the integrated chip is prevented from burning out, the counter is prevented from calculating inaccurately, and the user's room number is marked, which is convenient for meter reading or checking power consumption, and convenient for staff to find and repair.

Description

Technical Field

[0001] The invention relates to the technical field of electric power engineering, in particular to an intelligent electric energy meter with an overload protection device. Background Art

[0002] Smart meters are one of the basic devices for data collection in smart grids (especially smart distribution networks). They are responsible for collecting, measuring and transmitting raw electric energy data and are the basis for realizing information integration, analysis and optimization, as well as information display. The widespread application of smart meters can improve the operating efficiency of power companies, promote energy conservation and emission reduction, and enhance the stability of the power system.

[0003] In order to prevent the external wiring of the electric energy meter from loosening due to external force, the invention with the publication number CN116413490A discloses a smart electric energy meter, including a shell; a first groove is provided on the outer wall of the shell; a group of wiring grooves are provided at the top of the first groove; a pair of symmetrically distributed moving blocks are slidably connected to the bottom of the first groove, and a first slide groove is provided on the opposite surfaces of the pair of moving blocks; a U-shaped plate and a moving plate are fixedly connected in the pair of first slide grooves respectively through springs. The technical point is that the moving plate can slide in the first slide groove to buffer the wiring, so that the smart electric energy meter can be protected from the outside, but it is still impossible to protect the smart electric energy meter itself. For example, the rated current of electric energy meters of different specifications is different, and the load size is also different. Once the current exceeds the load of the electric energy meter, it will not only lead to inaccurate calculation of power consumption, but also easily burn out the electric energy meter. Moreover, for multiple user power consumption areas such as buildings, the electric energy meters are integrated together, and it is difficult to distinguish the electric energy meters of each household, which is not convenient for meter reading and checking power consumption, and it is difficult for staff to find and repair. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the existing electric energy meter has no overload protection, the electric energy meter is easily damaged, and it is difficult to mark the electricity usage location.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: an intelligent electric energy meter with an overload protection device, comprising an electric meter box, an integrated chip, a terminal block, an outer cover and a counter, wherein the integrated chip is installed in the inner cavity of the electric meter box, the terminal block is installed at the bottom of the electric meter box, the outer cover is installed at the front of the electric meter box, the counter is installed at the top of the front of the outer cover, and the counter is electrically connected to the integrated chip. It is characterized in that it also includes an overload protection mechanism and a classification mechanism, the overload protection mechanism is installed on the right side of the inner cavity of the electric meter box, and the classification mechanism is installed at the bottom end of the front of the outer cover.

[0006] The purpose is to convert electrical energy into mechanical movement to trigger the opening and closing component. The overload protection mechanism includes a first box body, an opening and closing component, a rotating shaft, a rocker arm, a gear, a bimetallic strip, a sleeve, a sliding rod, a rack and a pin. The first box body is installed on the right side of the inner cavity of the meter box; the opening and closing component is fixedly connected to the top of the inner cavity of the first box body; the rotating shaft is installed at the bottom end of the rear side of the inner cavity of the first box body through a bearing so that it can rotate around itself; the rocker arm and the gear are installed on the outer wall of the rotating shaft from front to back; the bimetallic strip is installed at the bottom end of the inner cavity of the first box body, and the bimetallic strip is electrically connected to the integrated chip; the sleeve is vertically installed at the right end of the rear side of the inner cavity of the first box body; the sliding rod can be slid up and down and inserted into the inner cavity of the sleeve; the rack is installed at the bottom end of the sliding rod, and the rack is meshed with the gear; one end of the pin is installed at the top of the sliding rod, and the other end is inserted into the front of the opening and closing component.

[0007] Specifically, the bimetallic strip is formed by compounding two metals with different thermal expansion coefficients, and the metal with a larger thermal expansion coefficient is at a lower position.

[0008] Specifically, the purpose is to control the power on and off of the first contact and the second contact to achieve overload protection of the integrated chip and the counter. The opening and closing assembly includes a support plate, a first contact, a guide rod, a first spring, a push-pull rod, a slot and a second contact. The support plate is vertically fixedly connected to the top of the inner cavity of the meter box; the first contact is horizontally installed on the right side wall of the support plate, and the first contact is electrically connected to the terminal block; the guide rod is horizontally inserted into the bottom of the support plate; the first spring is sleeved on the outer wall of the guide rod; the push-pull rod is fixedly connected to the right end of the guide rod, and the push-pull rod is pushed to the right under the action of the elastic force of the first spring. A slot is provided on the front of the push-pull rod, and the pin is inserted into the inner cavity of the slot; the second contact is installed on the upper surface of the push-pull rod, and the second contact is electrically connected to the first contact.

[0009] Specifically, the slot is in an L-shape.

[0010] Specifically, the classification mechanism includes a second box body, a support rod and a rotating assembly, the second box body is embedded in the bottom end of the front side of the outer cover; the support rod is horizontally installed at the center of the inner cavity of the second box body; there are several rotating assemblies, which are equidistantly installed on the outer wall of the support rod from left to right.

[0011] Specifically, the purpose is to mark the user's room number to distinguish the electricity meter. The rotating assembly includes a support base, a disc, a brake groove, a digital dial, a second spring, a slider and a brake rod. The support base is fixedly connected to the outer wall of the support rod; there are two discs, which are respectively fixedly connected to the left and right sides of the outer wall of the support base, and a brake groove is provided on the inner outer edge of the disc; the digital dial is rotatably mounted on the middle of the outer wall of the support base, and the numbers on the digital dial are used to display the user's room number; the second spring and the slider are inserted into the inner cavity of the digital dial from the inside to the outside, and the slider is pushed outward under the action of the elastic force of the second spring; one end of the brake rod is installed on the outside of the slider, and the other end is inserted into the inner cavity of the brake groove.

[0012] Specifically, the braking grooves are distributed on the outer wall of the disc in an annular wave shape.

[0013] Specifically, the outer wall of the brake rod is in the shape of a cylinder.

[0014] The beneficial effects of the present invention are:

[0015] 1. As the load increases, the current also increases. The temperature of the bimetallic strip gradually increases, and the bimetallic strip bends to the side with a smaller thermal expansion coefficient, causing the bimetallic strip to squeeze the rocker upward, allowing the gear to rotate clockwise. Under the transmission of the gear and rack, the slide rod drives the pin down until the pin is pushed out of the vertical inner cavity of the slot, releasing the positioning of the push-pull rod. Under the elastic force of the first spring, the push-pull rod moves to the right, the second contact is separated from the first contact, and the integrated chip is disconnected. Therefore, the purpose of overload protection is achieved, the integrated chip is prevented from burning out, and the counter is prevented from calculating inaccurately.

[0016] 2. By rotating the digital dial, the slider can drive the brake rod to slide in the brake groove. When the digital dial is rotated to the required angle, the brake rod is driven by the second spring to enter the protrusion at the corresponding position of the brake groove. The rotated digital dial is positioned, and digital switching can be performed to mark the user's room number, which is convenient for meter reading or checking electricity consumption, and also convenient for staff to find and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a front cross-sectional view of the overload protection mechanism of the present invention;

[0019] Figure 3 It is a front cross-sectional view of the opening and closing assembly of the present invention;

[0020] Figure 4 It is a front cross-sectional view of the classification mechanism of the present invention;

[0021] Figure 5 It is a front cross-sectional view of the rotating assembly of the present invention;

[0022] Figure 6 It is the left side view of the disc of the present invention.

[0023] In the figure: 1. electric meter box; 2. integrated chip; 3. terminal block; 4. outer cover; 5. counter; 6. overload protection mechanism; 7. classification mechanism; 61. first box body; 62. opening and closing assembly; 63. rotating shaft; 64. rocker rod; 65. gear; 66. bimetallic strip; 67. sleeve; 68. slide bar; 69. rack; 610. pin; 621. support plate; 622. first contact; 623. guide rod; 624. first spring; 625. push-pull rod; 626. slot; 627. second contact; 71. second box body; 72. support rod; 73. rotating assembly; 731. support seat; 732. disc; 733. brake slot; 734. digital dial; 735. second spring; 736. slider; 737. brake rod. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the preferred implementation scheme of the present invention is further described below in conjunction with specific implementation schemes and accompanying drawings.

[0025] See also Figure 1-6 The present invention provides an intelligent electric energy meter with an overload protection device, including an electric meter box 1, an integrated chip 2, a terminal block 3, an outer cover 4 and a counter 5. The integrated chip 2 is installed in the inner cavity of the electric meter box 1, and the integrated chip 2 can store and transmit power consumption data. The terminal block 3 is installed at the bottom of the electric meter box 1, and the wire connection is performed through the terminal block 3. The outer cover 4 is installed on the front of the electric meter box 1, and the counter 5 is installed on the top of the front of the outer cover 4, and the counter 5 is electrically connected to the integrated chip 2. The power consumption is calculated by the counter 5. An overload protection mechanism 6 is installed on the right side of the inner cavity of the electric meter box 1, and the overload protection mechanism 6 is electrically connected to the terminal block 3. A classification mechanism 7 is embedded in the bottom end of the front of the outer cover 4, and the power consumption position is marked by the classification mechanism 7.

[0026] The overload protection mechanism 6 includes a first box body 61 fixedly connected to the right inner wall of the meter box 1, an opening and closing assembly 62 is installed at the top of the inner cavity of the first box body 61, a rotating shaft 63 capable of rotating around its own axis is installed at the bottom of the inner cavity of the first box body 61 through a bearing, and a swing rod 64 and a gear 65 are installed on the outer wall of the rotating shaft 63 from front to back, respectively, and a bimetallic strip 66 electrically connected to the integrated chip 2 is installed at the bottom of the inner cavity of the first box body 61. The bimetallic strip 66 is composed of two metal strips with different thermal expansion coefficients, and the metal strip with a large thermal expansion coefficient is located at the lower position. When the current gradually increases, the bimetallic strip 66 is electrically connected to the integrated chip 2. The temperature of the metal sheet 66 gradually rises, and the side with a larger thermal expansion coefficient is squeezed toward the side with a smaller thermal expansion coefficient, so that the bimetallic strip 66 can push the rocker arm 64 upward. A sleeve 67 is vertically installed at the right end of the rear side of the inner cavity of the first box body 61. A slide bar 68 that can slide up and down is inserted into the inner cavity of the sleeve 67. A rack 69 meshing with the gear 65 is installed at the bottom end of the slide bar 68. When the gear 65 rotates clockwise or counterclockwise, the slide bar 68 can be pushed downward or upward. One end of a pin 610 is installed at the top of the slide bar 68, and the other end of the pin 610 is inserted into the opening and closing component 62.

[0027] As a preferred solution, further, the opening and closing assembly 62 includes a support plate 621 vertically installed on the top of the inner cavity of the first box body 61, and a first contact 622 electrically connected to the terminal row 3 is horizontally installed on the right side wall of the support plate 621. A guide rod 623 that can slide left and right is inserted at the bottom of the support plate 621, and a first spring 624 is sleeved on the outer wall of the guide rod 623. A push-pull rod 625 is installed at the right end of the guide rod 623. Under the elastic force of the first spring 624, the push-pull rod 625 is pushed to the right, and the right end of the push-pull rod 625 extends out of the right side wall of the meter box 1. A slot 626 is provided on the front of the push-pull rod 625, and the pin 610 is inserted into the inner cavity of the slot 626. A second contact 627 in contact with the first contact 622 is installed on the top of the push-pull rod 625, and the second contact 627 is electrically connected to the bimetallic strip 66. The slot 626 is L-shaped. When the pin 610 is in the vertical inner cavity of the slot 626, the push-pull rod 625 is horizontally positioned. When the pin 610 is in the horizontal inner cavity of the slot 626, the push-pull rod 625 can move to the right to disengage the second contact 627 from the first contact 622.

[0028] As a preferred solution, further, the classification mechanism 7 includes a second box body 71 embedded in the bottom end of the front side of the outer cover 4, a support rod 72 is horizontally installed in the inner cavity of the second box body 71, and a plurality of rotating components 73 are equidistantly installed on the outer wall of the support rod 72 from left to right, and the power consumption position is marked by the rotating component 73.

[0029] As a preferred embodiment, further, the rotating component 73 includes a support seat 731 installed on the outer wall of the support rod 72, and disks 732 are installed on the left and right sides of the outer wall of the support seat 731. A brake groove 733 is opened on the inner outer edge of the disk 732, and a rotatable digital dial 734 is sleeved on the middle part of the outer wall of the support seat 731. The numbers on the digital dial 734 can mark the power usage position. The inner cavity of the digital dial 734 is respectively inserted with a second spring 735 and a slider 736 from the inside to the outside, and the slider 736 is pushed to move under the elastic force of the second spring 735. One end of the brake rod 737 is installed on the outer side of the slider 736, and the other end of the brake rod 737 is inserted into the inner cavity of the brake groove 733. The brake groove 733 is annular and wavy. When the brake rod 737 enters the raised position of the brake groove 733, the digital dial 734 can be braked. The brake rod 737 is in the shape of a cylinder, and the curved surface of the brake rod 737 itself facilitates sliding in the brake groove 733.

[0030] Working principle:

[0031] Step 1: A closed loop is formed by the first contact 622, the second contact 627, the bimetallic strip 66, the integrated chip 2 and the counter 5. The integrated chip 2 collects power consumption data, and the counter 5 can calculate the power consumption;

[0032] Step 2: As the power load increases, the current in the circuit increases, and the bimetallic strip 66 heats up as the current increases. The bimetallic strip 66 bends toward the side with a smaller thermal expansion coefficient, thereby squeezing the swing rod 64 upward, and the gear 65 rotates clockwise. At the same time, the rack 69 drives the slide bar 68 to slide downward along the sleeve 67, and the pin 610 moves downward in the slot 626 until the pin 610 moves to the bottom of the slot 626. The pin 610 no longer blocks the push-pull rod 625, and the push-pull rod 625 is pushed to the right by the elastic force of the first spring 624, and the first contact 622 is separated from the second contact 627, so that overload power off is achieved;

[0033] Step 3: When the second contact 627 needs to be reset, the push-pull rod 625 is pressed to the left to make the second contact 627 contact the first contact 622. Under the gravity of the swing rod 64, the gear 65 rotates counterclockwise, the rack 69 drives the slide bar 68 to move upward, and the pin 610 reaches the top of the inner cavity of the slot 626. The pin 610 repositions the push-pull rod 625 to achieve the purpose of overload protection.

[0034] Step 4, turn the digital dial 734, causing the slider 736 to drive the brake rod 737 to rotate, and the brake rod 737 slides along the brake groove 733 until the number on the digital dial 734 matches the user's room number. Under the elastic force of the second spring 735, the brake rod 737 is inserted into the protrusion of the brake groove 733 at the corresponding position, and the rotated digital dial 734 is braked, thereby marking the user's room number for easy search.

[0035] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An intelligent electric energy meter with an overload protection device, comprising an electric meter box (1), an integrated chip (2), a terminal block (3), an outer cover (4) and a counter (5), wherein the integrated chip (2) is mounted in the inner cavity of the electric meter box (1), the terminal block (3) is mounted at the bottom of the electric meter box (1), the outer cover (4) is mounted at the front of the electric meter box (1), the counter (5) is mounted at the top of the front of the outer cover (4), and the counter (5) is electrically connected to the integrated chip (2), characterized in that: It also includes an overload protection mechanism (6) and a classification mechanism (7), wherein the overload protection mechanism (6) is installed on the right side of the inner cavity of the electric meter box (1), and the classification mechanism (7) is installed on the bottom end of the front side of the outer cover (4); The overload protection mechanism (6) comprises: A first box body (61) is installed on the right side of the inner cavity of the electric meter box (1); An opening and closing assembly (62) fixedly connected to the top end of the inner cavity of the first box body (61); A rotating shaft (63) is mounted at the bottom end of the rear side of the inner cavity of the first box body (61) via a bearing so as to be rotatable around itself; A swing rod (64) and a gear (65) are mounted on the outer wall of the rotating shaft (63) from front to back; A bimetallic strip (66) is mounted at the bottom end of the inner cavity of the first box body (61), the bimetallic strip (66) being electrically connected to the integrated chip (2), the bimetallic strip (66) being composed of two metals with different thermal expansion coefficients, with the metal with a larger thermal expansion coefficient being at the bottom; A sleeve (67) is vertically mounted at the right end of the rear side of the inner cavity of the first box body (61); A slide rod (68) is inserted into the inner cavity of the sleeve (67) so as to be able to slide up and down; A rack (69) is mounted on the bottom end of the slide bar (68), and the rack (69) is meshingly connected with the gear (65); A pin (610), one end of which is mounted on the top of the slide bar (68) and the other end of which is plugged into the front of the opening and closing assembly (62); The opening and closing assembly (62) comprises: A support plate (621) vertically fixedly connected to the top of the inner cavity of the electric meter box (1); A first contact (622) is transversely mounted on the right side wall of the support plate (621), and the first contact (622) is electrically connected to the terminal block (3); A guide rod (623) is inserted transversely into the bottom of the support plate (621); A first spring (624) sleeved on the outer wall of the guide rod (623); A push-pull rod (625) is fixedly connected to the right end of the guide rod (623), and is pushed to move rightward under the elastic force of the first spring (624). A slot (626) is provided on the front of the push-pull rod (625), and a pin (610) is plugged into the inner cavity of the slot (626); The second contact (627) is mounted on the upper surface of the push-pull rod (625), and the second contact (627) is electrically connected to the first contact (622).

2. The smart electric energy meter with an overload protection device according to claim 1, characterized in that: The shape of the card slot (626) is L-shaped.

3. The smart electric energy meter with overload protection device according to claim 2, characterized in that: The classification mechanism (7) comprises: A second box body (71) is embedded in the bottom end of the front side of the outer cover (4); A support rod (72) installed transversely at the center of the inner cavity of the second box body (71); There are a plurality of rotating components (73) which are installed on the outer wall of the support rod (72) at equal distances from left to right.

4. The smart electric energy meter with overload protection device according to claim 3, characterized in that: The rotating assembly (73) comprises: A support seat (731) fixedly connected to the outer wall of the support rod (72); There are two circular discs (732), which are respectively fixedly connected to the left and right sides of the outer wall of the support seat (731), and the inner outer edges of the circular discs (732) are provided with braking grooves (733); A digital dial (734) is rotatably sleeved on the middle part of the outer wall of the support base (731), and the numbers on the digital dial (734) are used to display the user's room number; The second spring (735) and the slider (736) are inserted into the inner cavity of the digital dial (734) from the inside to the outside, and the slider (736) is pushed outward under the elastic force of the second spring (735); A brake rod (737) has one end mounted on the outside of the slider (736) and the other end inserted into the inner cavity of the brake groove (733).

5. The smart electric energy meter with overload protection device according to claim 4, characterized in that: The braking grooves (733) are distributed in an annular wave shape on the outer wall of the disc (732).

6. The smart electric energy meter with overload protection device according to claim 5, characterized in that: The outer wall shape of the brake rod (737) is cylindrical.

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