Voltage signal sampling structure suitable for three-phase direct ammeter

Abstract

The utility model relates to a voltage signal sampling structure suitable for a three-phase direct-type ammeter. The sampling screw is inserted into a shell of the three-phase direct-type electric meter and used for sampling voltage signals of the electric meter, the voltage piece is matched with the sampling screw in an inserted mode and transmits the signals sampled by the sampling screw, and the voltage piece is fixed to the shell in a limited mode through the sampling screw. The shell is internally provided with a voltage line, the sampling screw is movably matched with the voltage line, the shell is provided with a sampling hole, the voltage line is arranged at the inner end of the sampling hole, and the sampling screw is movably matched with the shell by penetrating into the sampling hole. The movable cooperation of the sampling screw in the housing is used for controlling the opening and closing of the voltage line. According to the voltage signal sampling structure, the sampling screw and the sampling hole are arranged to be inserted and matched, so that the operation convenience of the voltage signal sampling structure is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric meter devices, and particularly relates to a voltage signal sampling structure applicable to a three-phase direct electric meter. Background Art

[0002] For three-phase direct electric meters, commonly used ones include three-phase four-wire active and reactive energy meters. The electromagnetic components are of a separated structure. The energy meter generates a moving-in magnetic field by synthesizing voltage and current components, causing the disc to rotate under its action. The rotation speed of the disc is proportional to the magnitude of the load current, achieving the purpose of measuring electric energy. When using this electric meter, it is often necessary to sample the voltage on the electric meter to calculate the required parameters. In the existing three-phase direct electric meters, the voltage signal sampling structure often adopts a double-hole structure and uses a sliding voltage piece for sampling. When sampling is not required, the screw needs to be loosened and the voltage piece needs to be slid to disconnect the sampling electrical connection. Such a structure has overly cumbersome operations and is not conducive to the use of the electric meter. Therefore, the structure of the traditional three-phase direct electric meter has deficiencies and needs to be further improved. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The purpose of the utility model is to overcome the defects of the prior art, solve the problem that the opening and closing operation steps of the voltage signal sampling structure of the existing three-phase direct electric meter are overly cumbersome, and provide a voltage signal sampling structure applicable to a three-phase direct electric meter.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows: A voltage signal sampling structure applicable to a three-phase direct electric meter, comprising a sampling screw inserted into the housing of the three-phase direct electric meter for sampling the voltage signal of the electric meter, and a voltage piece that forms an insertion fit with the sampling screw and transmits the signal sampled by the sampling screw. The sampling screw limits and fixes the voltage piece on the housing. A voltage wire is installed in the housing. The housing includes an outer housing and an inner housing. The voltage wire is installed on the inner housing. The sampling screw forms a movable fit with the voltage wire. The voltage wire is used for the voltage signal sampling structure to sample the voltage signal. A sampling hole is provided on the housing. The voltage wire is placed at the inner end of the sampling hole. The sampling screw forms a movable fit with the housing by passing through the sampling hole. The movable fit of the sampling screw in the housing is used to control the opening and closing with the voltage wire. This solution effectively improves the simplicity of the opening and closing operation. Specifically: By setting the sampling screw and the sampling hole to an insertion fit, and setting the sampling hole to a single-hole structure, whether the sampling screw is inserted to the bottom determines the opening and closing of the sampling screw and the voltage wire, determines whether the sampling screw contacts the voltage wire, and thus determines whether it is powered on and whether to sample from the voltage wire. The sampling screw in this solution can move up and down in the sampling hole. By its up and down movement, the sampling screw can determine whether to contact the voltage wire. Compared with the sampling structure with a double-hole structure in the prior art, in the prior art, it is also necessary to push a voltage piece with double holes to realize whether the sampling structure samples. And moving the voltage piece also requires loosening both screws. Such a structure is really inconvenient to operate. Moreover, the setting of the double-hole structure also increases the volume of the housing, making it necessary to have a sufficiently large housing to accommodate the sampling structure. This solution effectively improves the convenience of the operation of the voltage sampling structure through the above structural setting, effectively improves the operation efficiency through the above structural setting, makes the product have good practicability, better meets the market demand, and improves the use value brought by the electric meter to users.

[0007] Further, a screw hole for the sampling screw to pass through is provided on the voltage plate. The sampling screw passes through the screw hole and mates with the housing. One end of the sampling screw away from the housing forms a screw head, and the screw head is used to limit and fix the voltage plate on the housing. This solution further sets the structure of the screw head, effectively improving the convenience of the sampling operation of the sampling screw. Through the above structure setting, the screw head of the sampling screw is more conducive to the operation of the user. Through the structure setting of the screw hole, and the aperture of the screw hole is smaller than the outer diameter of the screw head, the aperture of the screw hole is just large enough for the sampling screw to pass through and can be stuck by the screw head. Through the setting of the above structure, the voltage plate is effectively limited on the housing by the screw head. Such a structure setting further improves the firmness of the voltage plate locking, and further improves the user experience through the above structure setting.

[0008] Further, the movable fit is a threaded fit. Threaded fit is a standard fit method in the current mechanical field. This solution further improves the convenience of using the sampling screw through such a structure setting. The operation efficiency is effectively improved through the cooperation of the threaded structure, making the product have a better user experience.

[0009] Further, the threaded fit is a simple threaded fit. On the basis of the previous solution, this solution further defines that the threaded fit is a simple threaded structure. This structural solution makes the operation more convenient, reduces the rotation stroke of the thread, and further improves the user experience, making it more convenient for the user to operate.

[0010] Further, a cross-shaped mating groove is provided on the screw head. This solution selects the structure of a cross-shaped mating groove on the screw head, further improving the convenience of rotating the screw head. In the user's operation, only a common cross screwdriver needs to be used, without the need to use special tools, further improving the operation convenience and making the user experience better.

[0011] Further, the voltage signal sampling structure is provided in several numbers and arranged in a straight line. By setting the voltage signal sampling structure as a single-hole structure, this solution effectively reduces the volume of the housing. The voltage signal sampling device can be provided in several numbers and arranged in a straight line. Such a structure helps for multiple... Such a structure helps the voltage signal sampling structure to sample on multiple voltage lines, thereby improving the sampling accuracy.

[0012] Further, three voltage signal sampling structures are provided, which are respectively used for sampling the voltages of three phases in the three-phase direct-reading electric meter. The structure of this solution actually makes it more suitable for use on the three-phase direct-reading electric meter. Through the above structural setting, the voltage signal sampling structure has better use value.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present utility model has the following beneficial effects: By setting the sampling screw and the sampling hole to be in an inserted fit and in a single-hole fit structure, the convenience of the operation of the voltage signal sampling structure is effectively improved, making the operation of connecting and disconnecting the sampling more convenient, having better use value and better practical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a three-dimensional structural schematic diagram of a voltage signal sampling structure in the prior art;

[0017] Figure 2 is a three-dimensional structural schematic diagram of a voltage signal sampling structure suitable for a three-phase direct-reading electric meter of the present utility model;

[0018] Figure 3 is an exploded view of a voltage signal sampling structure suitable for a three-phase direct-reading electric meter of the present utility model;

[0019] Figure 4 is Figure 3 a partial enlarged view of part A in

[0020] 1. Housing; 11. Inner housing; 12. Outer housing; 13. Sampling hole; 2. Sampling screw; 21. Screw head; 211. Cross-shaped mating groove; 3. Voltage plate; 31. Screw hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] As shown in the accompanying drawings, a voltage signal sampling structure for a three-phase direct electric meter in a specific embodiment of the present utility model includes a sampling screw 2 inserted into a housing 1 of the three-phase direct electric meter for sampling the voltage signal of the electric meter, and a voltage piece 3 that forms an insertion fit with the sampling screw 2 and transmits the signal sampled by the sampling screw 2. The sampling screw 2 limits and fixes the voltage piece 3 on the housing 1. The housing 1 includes an outer housing 11 and an inner housing 12. A voltage wire is installed on the inner housing 12. The sampling screw 2 forms a movable fit with the voltage wire. The voltage wire is used for the voltage signal sampling structure to sample the voltage signal. A sampling hole 13 is provided on the housing 1. The voltage wire is placed at the inner end of the sampling hole 13. The sampling screw 2 forms a movable fit with the housing 1 by passing through the sampling hole 13. The movable fit of the sampling screw 2 in the housing 1 is used to control the opening and closing with the voltage wire. This solution effectively improves the simplicity of the opening and closing operation. Specifically: in this solution, the sampling screw 2 and the sampling hole 13 are set to form an insertion fit, and the sampling hole 13 is set as a single-hole structure. Whether the sampling screw 2 is inserted to the bottom determines the opening and closing between the sampling screw 2 and the voltage wire, determines whether the sampling screw 2 contacts the voltage wire, and thus determines whether it is energized and whether to sample from the voltage wire. The sampling screw 2 in this solution can move up and down in the sampling hole 13. By its up and down movement, the sampling screw 2 can determine whether to contact the voltage wire. Compared with the sampling structure with a double-hole structure in the prior art, as Figure 1 shown, in the prior art, it is also necessary to push a voltage piece 3 with two holes to realize whether the sampling structure samples. And to move the voltage piece 3, two screws need to be loosened. Such a structure is really inconvenient to operate. Moreover, the setting of the double-hole structure also increases the volume of the housing 1, making it necessary to have a sufficiently large housing 1 to accommodate this sampling structure. Through the above structural setting, this solution effectively improves the convenience of the operation of the voltage sampling structure, effectively improves the operation efficiency through the above structural setting, makes this product have good practicability, is more adaptable to market demands, and improves the use value brought by the electric meter to users.

[0022] In a further technical solution of this embodiment, as Figures 2 to 4As shown, a screw hole 31 is provided on the voltage plate 3 for the sampling screw 2 to pass through. The sampling screw 2 passes through the screw hole 31 and cooperates with the housing 1. One end of the sampling screw 2 away from the housing 1 forms a screw head 21, and the screw head 21 is used to limit and fix the voltage plate 3 on the housing 1. In this solution, the structure of the screw head 21 is further set, effectively making the convenience of the sampling operation of the sampling screw 2 further improved. Through the above structure setting, the screw head 21 of the sampling screw 2 can be more beneficial to the user's operation. Through the structure setting of the screw hole 31, the aperture of the screw hole 31 is smaller than the outer diameter of the screw head 21, and the aperture of the screw hole 31 is just large enough for the sampling screw 2 to pass through and can be caught by the screw head 21. Through the setting of the above structure, the voltage plate 3 is effectively limited on the housing 1 by the screw head 21. Such a structure setting further improves the firmness of the locking of the voltage plate 3, and further improves the user's use effect through the above structure setting.

[0023] In a further technical solution of this embodiment, as Figures 2 to 4 shown, the movable fit is a threaded fit. Threaded fit is a standard fit method in the current mechanical field. In this solution, the convenience of using the sampling screw 2 is further improved through such a structure setting. Through the cooperation of the threaded structure, the operation efficiency is effectively improved, making the product have a better use effect.

[0024] In a further technical solution of this embodiment, as Figures 2 to 4 shown, the threaded fit is a simple threaded fit. On the basis of the previous solution, this solution further defines the structure of the threaded fit as a simple thread. This structural solution makes the operation more convenient, reduces the rotation stroke of the thread, and further improves the use effect, making it more convenient for the user to operate.

[0025] In a further technical solution of this embodiment, as Figures 2 to 4 shown, a cross-shaped mating groove 211 is provided on the screw head 21. In this solution, the structure of the cross-shaped mating groove 211 is selected on the screw head 21, further improving the convenience of rotating the screw head 21. In the user's use, only a commonly used cross screwdriver needs to be selected for operation, without the need to use special tools, further improving the convenience of operation and making the use effect better.

[0026] In a further technical solution of this embodiment, as Figures 2 to 4As shown, the voltage signal sampling structure is provided in several numbers and arranged in a straight line. In this solution, by setting the voltage signal sampling structure as a single-hole structure, the volume of the housing 1 is effectively reduced. The voltage signal sampling device can be provided in several numbers and arranged in a straight line. Such a structure helps with multiple... Such a structure helps the voltage signal sampling structure to sample on the voltage lines at multiple locations, thereby improving the accuracy of sampling.

[0027] In a further technical solution of this embodiment, as Figures 2 to 4 shown, the voltage signal sampling structure is provided in three numbers, respectively used to sample the voltages of the three phases in the three-phase direct electric meter. The structure of this solution actually makes it more suitable for use on a three-phase three-direct electric meter. Through the above structure setting, the voltage signal sampling structure has better use value.

[0028] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various variations and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope of the present invention. The technical content claimed by the present invention has been fully recorded in the claims.

Claims

1. A voltage signal sampling structure applicable to a three-phase direct electric meter, characterized in that: It includes a sampling screw inserted into the housing of the three-phase direct electric meter for sampling the voltage signal of the electric meter, and a voltage piece that forms an insertion fit with the sampling screw and transmits the signal sampled by the sampling screw. The sampling screw limits and fixes the voltage piece on the housing. The housing includes an outer shell and an inner shell. A voltage wire is installed on the inner shell. The sampling screw forms a movable fit with the voltage wire. The voltage wire is used for the voltage signal sampling structure to sample the voltage signal. A sampling hole is provided on the housing. The voltage wire is placed at the inner end of the sampling hole. The sampling screw forms a movable fit with the housing by passing through the sampling hole. The movable fit of the sampling screw in the housing is used to control the opening and closing with the voltage wire.

2. The voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 1, wherein: The voltage piece is provided with a screw hole for the sampling screw to pass through. The sampling screw passes through the screw hole and cooperates with the housing. One end of the sampling screw away from the housing forms a screw head, and the screw head is used to limit and fix the voltage piece on the housing.

3. The voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 2, characterized in that: The movable fit is a threaded fit.

4. The voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 3, characterized in that: The threaded fit is a simple threaded fit.

5. The voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 3, characterized in that: The screw head is provided with a cross-shaped mating groove.

6. The voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 1, wherein: The voltage signal sampling structures are set to be several and arranged in a straight line.

7. A voltage signal sampling structure applicable to a three-phase direct electric meter according to claim 6, characterized in that: The voltage signal sampling structures are set to be three, respectively used for sampling the voltages of the three phases in the three-phase direct electric meter.

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