Digital electric energy meter calibration device

Abstract

The utility model relates to the technical field of electric energy meter calibration, in particular to a digital electric energy meter calibration device which is matched with an electric energy meter for use, and the lower part of the electric energy meter is provided with a plurality of wiring terminals; the digital electric energy meter calibration device comprises a host. The lower part of the host is provided with two clamping hooks and a plurality of probe assemblies. First clamping grooves are symmetrically formed in two opposite inner walls of the electric energy meter, and the two clamping hooks are correspondingly clamped in the first clamping grooves respectively; the host and the electric energy meter are clamped in the first clamping groove through the clamping hook to be connected, and when the host is connected with the electric energy meter, the probe assembly is in contact with the wiring terminal. As each probe assembly is matched with the position of the wiring terminal of the electric energy meter, after the host is stably connected with the electric energy meter, the probe assemblies are correspondingly contacted with the wiring terminals, so that the condition of position movement between the probe assemblies and the wiring terminals is avoided, the length of a power-on path is shortened, the measurement error of an electric parameter signal is remarkably reduced, and the measurement accuracy of the electric parameter signal is improved. And the influence of external interference on signal acquisition is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy meter calibration, in particular to a digital electric energy meter calibration device. Background Art

[0002] With the rapid development and widespread adoption of smart grid technology, accurate measurement of electricity, the core output of the power system, has become crucial for ensuring fair transactions between suppliers and users. The energy meter, as the core instrument for energy measurement, is not only the legal basis for trade settlements between suppliers and users, but its accuracy is also directly related to the economic and social benefits of both parties. Therefore, in accordance with the strict requirements of the "DL / T 448-2016 Technical Management Regulations for Electricity Metering Devices," regular and efficient on-site inspections of all grades of energy meters are particularly important.

[0003] Currently, traditional electricity meter calibration devices on the market mostly use wired data collection methods. This model has exposed many disadvantages in actual applications:

[0004] 1. Complex operation: Before inspection, operators need to carefully identify and judge the complex circuit conditions on site, which increases the difficulty of work and the risk of error. In addition, the position of the probe and the terminal block is difficult to align, and even after alignment, relative position movement is likely to occur.

[0005] 2. Complicated wiring: The wiring process of voltage, current, pulse and 485 communication signals is complicated, which is not only time-consuming and labor-intensive, but also prone to wiring errors due to human factors;

[0006] 3. Low efficiency: The cumbersome wiring and winding process leads to a large workload for on-site testing, making it difficult to improve work efficiency and meet the needs of large-scale and high-efficiency electricity meter inspection;

[0007] 4. In the prior art, a long test line is generally used, that is, the terminal and the probe are connected by a wire, which increases the test distance and easily causes signal attenuation. Utility Model Content

[0008] The purpose of the invention of the utility model is to solve the problems existing in the prior art and provide a digital electric energy meter calibration device.

[0009] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0010] A digital electric energy meter calibration device is used in conjunction with an electric energy meter, wherein a plurality of connection terminals are provided at the bottom of the electric energy meter; the digital electric energy meter calibration device comprises a host, wherein two hooks and a plurality of probe assemblies are provided at the bottom of the host.

[0011] The two hooks are respectively arranged on the outer sides of a plurality of probe assemblies, and two first card slots are symmetrically arranged on two opposite inner walls of the electricity meter, and the two hooks are respectively and correspondingly clamped in the first card slots.

[0012] The main body and the electricity meter are connected by the hooks being clamped in the first card slots, and when the main body and the electricity meter are connected, the probe assemblies are in contact with the wiring terminals.

[0013] As an improvement to the technical solution of the digital electricity meter calibration device of the present utility model, the probe assembly includes a probe main body, the probe main body includes a fixing part, a contact part, and a base, a spring is arranged in the base, and two ends of the spring respectively abut against the fixing part and the contact part; the fixing part is welded to the circuit board inside the main body, and when the main body and the electricity meter are connected, the contact part of the probe main body is in contact with the wiring terminal.

[0014] As an improvement to the technical solution of the digital electricity meter calibration device of the present utility model, a reduced opening is formed at one end of the base close to the contact part, a convex platform is arranged at one end of the contact part close to the base, the reduced opening and the convex platform cooperate with each other, and two ends of the spring respectively abut against the convex platform and the fixing part.

[0015] As an improvement to the technical solution of the digital electricity meter calibration device of the present utility model, the digital electricity meter calibration device further includes a limiting structure, the limiting structure includes a limiting part sleeved outside the main body, and the vertical cross-section of the limiting part is in a shape of 冂.

[0016] As an improvement to the technical solution of the digital electricity meter calibration device of the present utility model, a convex edge is arranged at the lower part of the limiting part, a convex edge is arranged at the lower part of the limiting main part, and the convex edge restricts the relative front and back movement of the limiting main part with respect to the main body; when the limiting structure is sleeved on the main body, the convex edge is closely attached to the main body.

[0017] As an improvement to the technical solution of the digital electricity meter calibration device of the present utility model, the lower part of the hook is the hook body of the hook, and the hook body is arranged outward.

[0018] The beneficial effects of the present utility model:

[0019] First, when the present invention is in use, the host and the electric energy meter are securely connected via the hook and the first slot, and the probe assembly and the terminal block are in corresponding contact, achieving a purely wireless connection between the host and the electric energy meter. Furthermore, because the lower portion of the host is provided with multiple probe assemblies, each of which is positioned to match the position of the terminal block of the electric energy meter, when the host and the electric energy meter are securely connected, the multiple probe assemblies are in corresponding contact with the terminal block, preventing the probe assemblies from shifting relative to the terminal block.

[0020] Secondly, compared with the traditional long test line method, the utility model shortens the length of the power path by correspondingly contacting the probe assembly and the terminal, significantly reduces the measurement error of the electrical parameter signal, and effectively reduces the impact of external interference on signal acquisition. It solves the problem in the prior art that the power meter terminal and the host signal terminal are connected by wires, the test distance becomes longer, and signal attenuation is prone to occur and the problems caused by it. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the structural front view of the utility model;

[0022] Figure 2 for Figure 1 Rear view;

[0023] Figure 3 This is a schematic structural diagram of the probe assembly in the present invention;

[0024] Figure 4 for Figure 3 sectional view of

[0025] Figure 5 It is a schematic diagram of the structure of an electric energy meter in the prior art;

[0026] Figure 6 It is a schematic structural diagram of the electric energy meter and the utility model in the engaged state.

[0027] Explanation of the accompanying reference numerals: 1-digital electricity meter calibration device; 2-electricity meter; 3-connecting terminal; 4-probe assembly; 5-host; 6-hook; 7-first slot; 8-circuit board; 9-contact portion; 10-base; 11-spring; 12-neck; 13-boss; 14-limiting structure; 15-top wall; 16-side wall; 17-convex edge; 18-hook body; 19-fixing portion; 20-probe body; 21-second slot. DETAILED DESCRIPTION

[0028] In order to make the purpose of the invention, technical solutions and beneficial effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings 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.

[0029] like Figures 1 to 6 As shown, the digital electric energy meter calibration device 1 is used in conjunction with the electric energy meter 2, and a plurality of connection terminals 3 are provided at the bottom of the electric energy meter 2; the digital electric energy meter calibration device 1 includes a host 5, and two hooks 6 and a plurality of probe assemblies 4 are provided at the bottom of the host 5.

[0030] Two hooks are respectively arranged on the outside of the plurality of probe assemblies 4 . First slots 7 are symmetrically arranged on two opposite inner walls of the electric energy meter 2 . The two hooks 6 are correspondingly arranged in the first slots 7 .

[0031] The host 5 and the electric energy meter 2 are connected by the hook 6 being locked in the first slot 7 , and when the host 5 and the electric energy meter 2 are connected, the probe assembly 4 contacts the connection terminal 3 .

[0032] First, when the present invention is in use, the connection between the hook 6 and the first slot 7 achieves a stable connection between the host 5 and the energy meter 2, that is, not only the connection effect between the two is achieved, but also the effect that the two are not easily moved. In addition, since a plurality of probe assemblies 4 are also provided at the bottom of the host 5, these probe assemblies 4 are adapted to the positions of the wiring terminals 3 of the energy meter 2. When the host 5 and the energy meter 2 are firmly connected by the hook 6 and the first slot 7, the probe assemblies 4 can accurately contact the corresponding wiring terminals 3, while effectively preventing the probe assemblies 4 from moving with the wiring terminals 3.

[0033] That is, in the present invention, after the host 5 of the present invention is firmly connected to the electric energy meter 2 through the hook 6 and the first slot 7, the probe assembly 4 and the terminal block 3 are correspondingly in contact, thereby realizing a purely wireless connection between the host 5 and the electric energy meter 2, avoiding the limitation of the traditional electric energy meter calibration device that mostly adopts a wired acquisition method, and solving the problem that the operator needs to carefully identify and judge the complex line conditions on site before inspection in the existing wired acquisition method, which increases the difficulty of work and the risk of error, and the position of the probe and the terminal block 3 is difficult to align, and even after alignment, relative position movement is easy to occur; moreover, since the host 5 is firmly connected to the electric energy meter 2, once the two are connected, they are not easy to move, that is, the position between the probe assembly 4 and the terminal block 3 is not easy to move, solving the problem that the wiring process of voltage, current, pulse and 485 communication signals in the prior art is cumbersome, not only time-consuming and labor-intensive, but also prone to wiring errors due to human factors, and the cumbersome wiring and wire collection process leads to a large workload for on-site inspection, difficulty in improving work efficiency, and difficulty in meeting the needs of large-scale and high-efficiency electric energy meter 2 inspection.

[0034] Secondly, compared with the traditional long test line method, the utility model shortens the length of the power path by correspondingly contacting the probe assembly 4 and the terminal 3, significantly reduces the measurement error of the electrical parameter signal, and effectively reduces the impact of external interference on signal acquisition. It solves the problem in the prior art that the terminal 3 and the host signal terminal are connected by wires, the test distance becomes longer, and signal attenuation is prone to occur and the problems caused by it.

[0035] When the present invention is in use, the host 5 and the electric energy meter 2 are firmly connected through the hook 6 and the first slot 7. After the connection, the probe assembly 4 on the host 5 contacts the terminal 3 on the electric energy meter 2, and the signal information in the electric energy meter 2 is collected through the probe assembly 4 to calibrate the accuracy of the electric energy meter 2.

[0036] In some embodiments of the present invention, the lower portion of the hook 6 is a hook body 18 , and the hook body 18 is arranged outward to facilitate snap connection with the first slot 7 .

[0037] In the present invention, the first slot 7 in the electric energy meter 2 is an inherent structure of the electric energy meter 2. To connect the hook 6 with the first slot 7, the hook body 18 of the hook 6 is arranged outward so as to be locked in the first slot 7. This achieves the connection between the hook 6 and the first slot 7, and then the connection between the host 5 and the electric energy meter 2. Moreover, because the first slot 7 is an inherent structure of the electric energy meter 2, the present invention implements improvements based on the existing structural environment to solve the problems existing in the prior art.

[0038] In the present invention, in order to facilitate the staff to calibrate at least one electric energy meter 2, the digital calibration device of the present invention is detachably connected to the electric energy meter 2, and preferably can be easily connected multiple times.

[0039] In some embodiments of the present invention, the probe assembly 4 is disposed in the host 5 and extends outward from the host 5 .

[0040] Furthermore, each probe assembly 4 includes a probe body 20, which includes a fixing portion 19 and a contact portion 9. The contact portion 9 contacts the terminal 3, and the fixing portion 19 is soldered to the circuit board 8 of the calibration device. The probe body 20 also includes a base 10, which contains a spring 11. The two ends of the spring 11 respectively contact the fixing portion 19 and the contact portion 9. When the host 5 and the energy meter 2 are connected, the contact portion 9 of the probe body 20 can contact the terminal 3.

[0041] Furthermore, a constriction 12 is formed at one end of the base 10 close to the contact portion 9, and a boss 13 is formed at one end of the contact portion 9 close to the base 10. The constriction 12 and the boss 13 cooperate with each other, and the two ends of the spring 11 respectively abut against the boss 13 and the fixing portion 19.

[0042] In detail, in the present invention, each probe assembly 4 is made of a highly conductive material, and the setting of the spring 11 can automatically adjust to adapt to contact surfaces of different flatnesses, ensuring the contact effect between the probe body 20 and the detected terminal 3.

[0043] In addition, under the action of the present invention, the effect of precise docking signal conduction can be achieved. Among them, the inner diameter of the base 10 is slightly larger than the outer diameter of the contact part 9 and the spring 11. The spring 11 is arranged in the base 10, and the contact part 9 is half embedded in the base 10, forming a stable electrical connection with the base 10 through the spring 11. At the same time, under the action of the spring 11, the contact part 9 can achieve a certain stroke of expansion and contraction in the base 10. A constriction 12 is formed at one end of the base 10 close to the contact part 9, and a boss 13 is formed at the end of the contact part 9 close to the base 10, and the constriction 12 and the boss 13 work in coordination.

[0044] More specifically, one end of the contact portion 9 contacts the terminal 3 of the energy meter 2 under test, and the other end is connected to the spring 11. One end of the fixing portion 19 contacts the spring 11, and the other end contacts the pad on the circuit board 8 of the host 5, which is connected to the voltage signal, pulse signal, and communication signal.

[0045] When the host 5 and the electricity meter 2 are snap-connected, the contact part 9 of the probe assembly 4 is accurately aligned with the wiring terminal 3 of the electricity meter 2 to complete the electrical connection, and at the same time, the signal acquisition process is started. For the voltage signal, it is directly transmitted to the voltage measurement module of the host 5; for the pulse and communication signals, they are sent to the FPGA (Field Programmable Gate Array) of the host 5 for high-speed processing to ensure the integrity and real-time nature of the signals.

[0046] In some embodiments of the present utility model, the digital electricity meter calibration device 1 further includes a limiting structure 14. The limiting structure 14 includes a limiting part sleeved outside the host 5, and the vertical cross-section of the limiting part is in a "冂" shape.

[0047] Furthermore, a convex edge 17 is provided at the lower part of the limiting part, and a convex edge 17 is provided at the lower part of the limiting main part. The convex edge 17 restricts the relative front-back movement of the limiting main part relative to the host 5; when the limiting structure 14 is sleeved on the host 5, the convex edge 17 abuts tightly against the host 5.

[0048] It should be noted here that the vertical cross-section of the limiting part being in a "冂" shape means that the limiting part is composed of a top wall 15 and side walls 16 extending downward from both ends of the top wall 15 respectively.

[0049] Specifically, a second card slot 21 is provided in a surrounding manner on the outer surface of the electricity meter 2. The limiting structure 14 is sleeved on the host 5, such that the limiting part is in close fit with the second card slot 21 of the electricity meter 2, and in combination with the settings of the top wall 15 and the side walls 16, a surrounding protection is formed to ensure the stable positioning of the host 5 in the vertical direction and prevent the host 5 from shaking or displacing during the detection process. It should be noted here that the second card slot 21 is also an inherent structure of the electricity meter 2. In the present utility model, improvements are made based on the existing structural environment to solve the problems existing in the prior art.

[0050] In the present utility model, under the combined action of the limiting part and the convex edge 17, the effect of the limiting device being sleeved outside the calibration device host 5 is achieved, and the convex edge 17 is provided at the front part outside the calibration device host 5, achieving the effect of avoiding the relative position movement between the host 5 and the electricity meter 2 after the host 5 and the electricity meter 2 are connected through the limiting component; that is, in the present utility model, when the limiting structure 14 is sleeved on the host 5, under the combined action of the limiting part and the convex edge 17, the limiting structure 14 forms a surrounding protection relative to the electricity meter 2, and can ensure the stable positioning of the host 5 in the horizontal direction and avoid the situation of the host 5 shaking or displacing during the calibration process.

[0051] Furthermore, in the present invention, the design of the hook 6 being clamped in the first slot 7 and the limiting structure 14 jointly realize the fixed connection between the host 5 and the electric energy meter 2. The double fixing mechanism ensures the stability of the verification device during the verification process, providing a strong guarantee for the accurate acquisition of the signal.

[0052] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A digital electric energy meter calibration device, used in conjunction with an electric energy meter, wherein a plurality of connection terminals are provided at the bottom of the electric energy meter; the digital electric energy meter calibration device comprises a host, characterized in that: The lower part of the main unit is provided with two hooks and a plurality of probe assemblies; The two hooks are respectively arranged on the outside of the plurality of probe assemblies, and a first slot is symmetrically arranged on two opposite inner walls of the electric energy meter, and the two hooks are respectively and correspondingly arranged in the first slot; The host and the electric energy meter are connected by the hook being locked in the first slot, and when the host and the electric energy meter are connected, the probe assembly contacts the connection terminal.

2. The digital electric energy meter calibration device according to claim 1, characterized in that: The probe assembly includes a probe body, which includes a fixing part, a contact part, and a base. A spring is provided in the base, and the two ends of the spring are respectively in contact with the fixing part and the contact part; the fixing part is welded to the circuit board inside the host, and when the host and the electric energy meter are connected, the contact part of the probe body contacts the wiring terminal.

3. The digital electric energy meter calibration device according to claim 2, characterized in that: A constriction is formed at one end of the base close to the contact portion, and a boss is formed at one end of the contact portion close to the base. The constriction and the boss cooperate with each other, and two ends of the spring respectively abut against the boss and the fixing portion.

4. The digital electric energy meter calibration device according to claim 1, characterized in that: The digital electric energy meter calibration device further comprises a limiting structure, wherein the limiting structure comprises a limiting portion sleeved on the outside of the host, and the vertical cross-section of the limiting portion is in a convex shape.

5. The digital electric energy meter calibration device according to claim 4, characterized in that: The lower part of the limiting portion is provided with a convex edge, and the lower part of the limiting main component is provided with a convex edge. The convex edge limits the forward and backward movement of the limiting main component relative to the host. When the limiting structure is sleeved on the host, the convex edge is tightly attached to the host.

6. The digital electric energy meter calibration device according to claim 1, characterized in that: The lower part of the hook is the hook body of the hook, and the hook body is arranged outward.

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