Anti-electricity theft metering voltage transformer

Abstract

The present application relates to the technical field of transformers, in particular to a voltage transformer, an anti-electricity theft metering voltage transformer, a housing and a secondary winding, the wiring terminals of the secondary winding are fixed on the housing, and the wiring terminals are connected with wires connected to an electric meter; it also includes a cover covering the wiring terminals of the secondary winding, called an anti-electricity theft cover; the anti-electricity theft cover is connected and arranged on the housing; at least two threaded through holes are arranged on the anti-electricity theft cover, and lead sealing bolts are inserted into the threaded through holes, and the lead sealing bolts fix the anti-electricity theft cover and the housing; the sealing wire of the lead seal passes through the through holes of at least two lead sealing bolts, and the sealing wire of the lead seal is fixed to the lead block; the anti-electricity theft cover is provided with a structure formed by solidifying epoxy resin material that wraps the wires and the wiring terminals, called an epoxy resin layer; that is, it prevents other people from tampering with or short-circuiting the wiring terminals through the gaps in the anti-electricity theft cover, and ensures the stable connection between the wires and the wiring terminals.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a voltage transformer. Background Art

[0002] A metering voltage transformer is a device used to measure voltage in a power system. It can convert the voltage signal in a high-voltage line into a low-voltage signal so that it can be connected to equipment such as an electric meter for safe measurement.

[0003] The metering voltage transformer converts the voltage signal in the high-voltage line into a low-voltage signal. Although this improves safety, it also makes it easy for others to steal electricity by tampering with or short-circuiting the secondary winding connection wires. Therefore, the secondary winding terminals need to be protected. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the problems existing in the above-mentioned prior art, the present utility model is proposed.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The anti-electricity theft metering voltage transformer comprises a housing and a secondary winding, wherein the connection terminal of the secondary winding is fixed on the housing, and the connection terminal is provided with a wire connected to the electric meter;

[0008] Also included is a cover covering the connection terminals of the secondary winding, called an anti-electricity theft cover;

[0009] The anti-electricity theft cover is connected and arranged on the housing;

[0010] The anti-electricity theft cover is provided with at least two threaded through holes, and two lead sealing bolts are respectively inserted into the two threaded through holes, and the lead sealing bolts fix the anti-electricity theft cover and the housing;

[0011] A through hole is provided on the circumferential side of the head of each of the lead sealing bolts;

[0012] It also includes a lead seal, the sealing wire of the lead seal passes through the through holes of at least two of the lead seal bolts, and the sealing wire of the lead seal is fixed in the lead block;

[0013] The anti-electricity theft cover is provided with a structure formed by solidifying epoxy resin material that wraps the wires and the wiring terminals, which is called an epoxy resin layer;

[0014] The anti-electricity-stealing cover is sealed and connected to the shell, and the epoxy resin layer is poured into the inner cavity of the anti-electricity-stealing cover which is sealed and connected to the shell.

[0015] The above design firstly sets an anti-electricity theft cover to cover the secondary winding terminal with the anti-electricity theft cover, so as to prevent others from tampering with or short-circuiting the wires connected to the secondary winding terminal to steal electricity, and protects the terminal to prevent it from being affected by the external environment and causing unstable connection. Secondly, the anti-electricity theft cover is fixed with lead sealing bolts, and then the lead sealing wire is passed through at least two through holes of the lead sealing bolts to prevent others from opening the anti-electricity theft cover, and further prevent others from tampering with or short-circuiting the wires connected to the secondary winding terminal. The lead sealing can also facilitate patrol personnel to detect whether the anti-electricity theft cover has been opened by others. Finally, epoxy resin is filled in the inner cavity formed by the sealed connection between the anti-electricity theft cover and the shell, and the terminal and the wire are cured and sealed, that is, it is prevented that others tamper with or short-circuit the terminal through the gap of the anti-electricity theft cover, and the stability of the connection between the wire and the terminal is improved, thereby ensuring the stability of the connection between the wire and the terminal.

[0016] Preferably, the anti-electricity theft cover is made of transparent polyvinyl chloride material; polyvinyl chloride material has good corrosion resistance, wear resistance and hardness, and the transparent material makes it convenient for staff to detect the connection status of the terminal and the wire, thereby improving the anti-tampering ability of the anti-electricity theft cover.

[0017] Preferably, the sealing wire of the lead seal is made of stainless steel wire; the stainless steel wire has high hardness and poor ductility, and the lead block can be pulled apart to remind the staff when someone tampered with the lead seal bolt.

[0018] The anti-theft electricity cover is provided with a connecting ear, a lead sealing bolt is arranged in a threaded through hole on the connecting ear, the connecting ear is arranged at the bottom of the anti-theft electricity cover, and the lead sealing bolt is 5-8 cm away from the top of the anti-theft electricity cover; ensuring that the sealing line of the lead seal cannot be pulled open.

[0019] Preferably, the shell is provided with a groove for installing the anti-theft cover, called an installation groove, and the wiring terminal is connected and arranged in the installation groove; the portion where the installation groove and the flange of the anti-theft cover fit together is provided with a sealing ring made of rubber material; by providing the sealing ring, the sealing between the anti-theft cover and the shell is increased to prevent the leakage of liquid epoxy resin, and ensure that the epoxy resin wraps the wires and the wiring terminals when solidified, thereby improving the protection capability of the anti-theft cover and preventing others from tampering with or short-circuiting the wires and the wiring terminals.

[0020] Preferably, the anti-electricity theft cover is provided with an opening for introducing epoxy resin fluid, called a pouring port; the anti-electricity theft cover is also provided with a ventilating port; the pouring port and the ventilating port are both provided on the upper side of the anti-electricity theft cover; by providing the pouring port and the ventilating port, after the epoxy resin and the curing agent are mixed, they can be introduced from the pouring port into the anti-electricity theft cover to wrap the wires and the terminal blocks, and during pouring, the gas will be discharged from the ventilating port to prevent the epoxy resin layer from mixing with air, thereby improving the stability of the epoxy resin layer structure, thereby improving the stability of the connection between the terminal blocks and the wires.

[0021] Preferably, a layer of net called a protective net is wrapped outside the insulating layer of the wire, and the protective net is a net woven from nylon fibers containing stainless steel wires; by providing the protective net, it is prevented from others cutting the wire to tamper with or short-circuit.

[0022] The shell is also provided with a through hole connected to the installation groove, and the wire passes through the through hole to be connected to the wiring terminal; the wire is sleeved with a sealing sleeve made of rubber material, and the sealing sleeve is arranged between the through hole and the wire; by arranging the sealing sleeve, the sealing of the anti-theft cover to the shell is ensured, the epoxy resin is ensured not to leak, and the stability of the epoxy resin layer is improved.

[0023] Optimization, the lead sealing bolt adopts a bolt with a cross groove recessed hexagonal head; a spring washer and a flat washer are inserted on the screw of the lead sealing bolt, a spring washer is padded under the head of the lead sealing screw, a flat washer is padded under the spring washer, and the bottom end of the flat washer is attached to the anti-electricity theft cover; the stability of the lead sealing bolt connection is improved by arranging the spring washer and the flat washer will not loosen even after long-term work.

[0024] Optimization, the structure for pressing the wire on the anti-electricity theft cover is called a pressure strip; the pressure strip is connected and arranged on the side wall of the inner cavity of the anti-electricity theft cover; by arranging the pressure strip to press the wire, the wire is prevented from being pulled so that the connection between the wire and the terminal becomes loose or disconnected, thereby improving the stability of the connection between the wire and the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0026] Figure 1 A schematic diagram of the overall connection structure of an anti-electricity theft metering voltage transformer according to an embodiment of the utility model;

[0027] Figure 2A schematic diagram of the structure of an anti-electricity theft cover and a shell explosion in an anti-electricity theft type metering voltage transformer according to an embodiment of the utility model;

[0028] Figure 3 The present invention is a schematic diagram of the bottom structure of an anti-tampering cover, a lead sealing bolt and a lead sealing combined structure in an anti-tampering metering voltage transformer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] Reference Figure 1 to Figure 3 This embodiment provides an anti-electricity theft metering voltage transformer including a housing 1 and a secondary winding, wherein a connection terminal 2 of the secondary winding is fixed on the housing 1, and a wire 3 connected to the electric meter is connected to the connection terminal 2.

[0035] It also includes a cover covering the terminal 2 of the secondary winding, which is called an anti-theft cover 4; the anti-theft cover 4 is connected to the shell 1; at least two threaded through holes are provided on the anti-theft cover 4, and two lead sealing bolts 10 are respectively inserted in the two threaded through holes, and the lead sealing bolts 10 fix the anti-theft cover 4 and the shell 1; a through hole is provided on the circumferential side of the head of each lead sealing bolt 10; it also includes a lead seal 5, the sealing line of the lead seal 5 passes through the through holes of at least two lead sealing bolts 10, and the sealing line of the lead seal 5 is fixed to the lead block; the anti-theft cover 4 is provided with a structure formed by solidifying the epoxy resin material that wraps the wire 3 and the terminal 2, which is called an epoxy resin layer; the anti-theft cover 4 is sealed and connected to the shell 1, and the epoxy resin layer is poured in the cavity of the anti-theft cover 4 that is sealed and connected to the shell 1; first, by setting the anti-theft cover 4, the terminal 2 of the secondary winding is covered with the anti-theft cover 4 to prevent other people from The wire 3 connected to the secondary winding terminal 2 is tampered with or short-circuited to steal electricity, and the terminal 2 is protected to prevent it from being affected by the external environment and causing unstable connection. Secondly, the anti-theft cover 4 is fixed with a lead seal bolt 10, and the sealing wire of the lead seal 5 is passed through the through holes of at least two lead seal bolts 10 to prevent others from opening the anti-theft cover 4, and further prevent others from tampering with or short-circuiting the wire 3 connected to the secondary winding terminal 2. By setting the lead seal 5, it is also convenient for patrol personnel to detect whether the anti-theft cover 4 has been opened by someone; finally, epoxy resin is filled in the inner cavity formed by the sealed connection between the anti-theft cover 4 and the shell 1, and the terminal 2 and the wire 3 are cured and sealed, that is, it is prevented from others tampering with or short-circuiting the terminal 2 through the gap of the anti-theft cover 4, and the stability of the connection between the wire 3 and the terminal 2 is improved, thereby protecting the connection between the wire 3 and the terminal 2.

[0036] The anti-electricity theft cover 4 is made of transparent polyvinyl chloride; the polyvinyl chloride material has good corrosion resistance, wear resistance and hardness, and the transparent material is convenient for staff to detect the connection status of the terminal 2 and the wire 3, thereby improving the anti-tampering ability of the anti-electricity theft cover 4.

[0037] The sealing wire of the lead seal 5 is made of stainless steel wire; the stainless steel wire has high hardness and poor ductility, and the lead block can be pulled apart to remind the staff when someone tampered with the lead seal bolt 10.

[0038] The anti-theft cover 4 is provided with a connecting ear, and the lead seal bolt 10 is arranged in a threaded through hole on the connecting ear. The connecting ear is arranged at the bottom of the anti-theft cover 4, and the lead seal bolt 10 is 5-8 cm away from the top of the anti-theft cover 4; ensuring that the sealing line of the lead seal 5 cannot be pulled open.

[0039] The housing 1 is provided with a groove for installing the anti-theft cover 4, called the installation groove 6, and the terminal 2 is connected and arranged in the installation groove 6; the portion where the installation groove 6 and the flange of the anti-theft cover 4 fit together is provided with a sealing ring 7 made of rubber material; by providing the sealing ring 7, the sealing performance between the anti-theft cover 4 and the housing 1 is increased to prevent the leakage of liquid epoxy resin, and ensure that the epoxy resin wraps the wire 3 and the terminal 2 when solidified, thereby improving the protection capability of the anti-theft cover 4 and preventing others from tampering with or short-circuiting the wire 3 and the terminal 2.

[0040] The anti-electricity theft cover 4 is provided with an opening for introducing epoxy resin fluid, which is called a pouring port 8; the anti-electricity theft cover 4 is also provided with a ventilating port; the pouring port 8 and the ventilating port are both provided on the upper side of the anti-electricity theft cover 4; by providing the pouring port 8 and the ventilating port, after the epoxy resin and the curing agent are mixed, they can be introduced from the pouring port 8 into the anti-electricity theft cover 4 to wrap the wire 3 and the terminal 2, and the gas will be discharged from the ventilating port during pouring to prevent the epoxy resin layer from mixing with air, thereby improving the stability of the epoxy resin layer structure, thereby improving the stability of the connection between the terminal 2 and the wire 3.

[0041] When in use, the anti-electricity-theft metering voltage transformer provides liquid epoxy resin and solidifying agent, firstly connects the wire 3 to the terminal 2, then covers the terminal 2 with the anti-electricity-theft cover 4, connects the anti-electricity-theft cover 4 and the housing 1 with the lead-sealing bolts 10, and the flange of the anti-electricity-theft cover 4 presses the sealing ring 7 to ensure the seal between the housing 1 and the anti-electricity-theft cover 4, and then passes the sealing wire of the lead seal 5 through the through holes of at least two lead-sealing bolts 10, and then mixes the epoxy resin and solidifying agent, and pours them into the anti-electricity-theft cover 4 from the pouring port 8, and after the epoxy resin solidifies, it wraps the wire 3 and the terminal 2, thereby protecting the wire 3 and the terminal 2, and preventing others from stealing electricity by tampering with or short-circuiting the secondary winding connection line.

[0042] Example 2

[0043] Reference Figure 2 and Figure 3 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment.

[0044] The insulating layer of the wire 3 is wrapped with a layer of net called a protective net, which is a net woven from nylon fibers containing stainless steel wires. The protective net can prevent others from cutting the wire 3 to tamper with or short-circuit it.

[0045] The housing 1 is also provided with a through hole connected to the mounting groove 6, and the wire 3 passes through the through hole and is connected to the terminal 2; a sealing sleeve made of rubber is sleeved on the wire 3, and the sealing sleeve is arranged between the through hole and the wire 3; by arranging the sealing sleeve, the sealing of the anti-theft cover 4 to the housing 1 is ensured, the epoxy resin is ensured not to leak, and the stability of the epoxy resin layer is improved.

[0046] The sealing bolt 10 adopts a bolt with a cross-slotted hexagonal head; a spring washer and a flat washer are inserted on the screw of the sealing bolt 10, a spring washer is padded under the head of the screw of the sealing 5, a flat washer is padded under the spring washer, and the bottom end of the flat washer is attached to the anti-theft cover 4; the stability of the connection of the sealing bolt 10 is improved by arranging the spring washer and the flat washer will not loosen after long-term work.

[0047] The structure for pressing the wire 3 on the anti-theft cover 4 is called a pressure strip 9; the pressure strip 9 is connected to the inner cavity side wall of the anti-theft cover 4; by setting the pressure strip 9 to press the wire 3, the wire 3 is prevented from being pulled so that the connection between the wire 3 and the terminal 2 becomes loose or disconnected, thereby improving the stability of the connection between the wire 3 and the terminal 2.

[0048] When in use, wrap the wire 3 in the protective net, then wrap the wire 3 wrapped in the protective net with a sealing sleeve, then pass the wire 3 through the through hole, the sealing sleeve on the wire 3 is padded between the through hole and the wire 3, then press the wire 3 with the pressure strip 9 of the anti-theft cover 4, connect and fix the anti-theft cover 4 with the lead sealing bolt 10, the lead sealing bolt 10 is padded with spring pads and flat pads to prevent the lead sealing bolt 10 from loosening, then pour epoxy resin, and the sealing sleeve on the wire 3 is padded between the through hole and the wire 3 to ensure the stability between the anti-theft cover 4 and the housing 1.

[0049] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible, for example, the size, scale, structure, shape and proportion of various elements, and parameter values ​​such as temperature, pressure, etc., mounting arrangements, use of materials, color, directional changes, etc., without substantially departing from the novel angles and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present utility model, other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described, ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention.

[0051] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An anti-electricity theft metering voltage transformer, comprising a housing and a secondary winding, wherein the connection terminal of the secondary winding is fixed on the housing, and the connection terminal is connected with a wire connected to an electric meter, and is characterized in that: Also included is a cover covering the connection terminals of the secondary winding, called an anti-electricity theft cover; The anti-electricity theft cover is connected and arranged on the housing; The anti-electricity theft cover is provided with two threaded through holes, and two lead sealing bolts are respectively inserted into the two threaded through holes, and the lead sealing bolts fix the anti-electricity theft cover and the housing; A through hole is provided on the circumferential side of the head of each of the lead sealing bolts; It also includes a lead seal, the sealing wire of the lead seal passes through the through holes of at least two of the lead seal bolts, and the sealing wire of the lead seal is fixed in the lead block; The anti-electricity theft cover is provided with a structure formed by solidifying epoxy resin material that wraps the wires and the wiring terminals, which is called an epoxy resin layer; The anti-electricity-stealing cover is sealed and connected to the shell, and the epoxy resin layer is poured into the inner cavity of the anti-electricity-stealing cover which is sealed and connected to the shell.

2. The anti-electricity-theft metering voltage transformer according to claim 1 is characterized in that: The anti-electricity theft cover is made of transparent polyvinyl chloride.

3. The anti-electricity-theft metering voltage transformer according to claim 2 is characterized in that: The sealing wire of the lead seal is made of stainless steel wire.

4. The anti-electricity-theft metering voltage transformer according to claim 3 is characterized in that: The housing is provided with a groove for installing the anti-electricity theft cover, which is called an installation groove, and the wiring terminal is connected and arranged in the installation groove; The portion where the installation groove and the flange of the anti-electricity-theft cover are in contact with each other is provided with a sealing ring made of rubber material.

5. The anti-electricity-theft metering voltage transformer according to claim 4 is characterized in that: The anti-electricity theft cover is provided with an opening for introducing epoxy resin fluid, which is called a pouring port; The anti-electricity-theft cover is also provided with a ventilating opening for ventilation; The pouring port and the air vent are both arranged on the upper side of the anti-electricity-theft cover.

6. The anti-electricity-theft metering voltage transformer according to claim 5 is characterized in that: The insulating layer of the conductor is wrapped with a layer of net called a protective net, and the protective net is a net woven from nylon fibers containing stainless steel wires.

7. The anti-electricity-theft metering voltage transformer according to claim 6 is characterized in that: The housing is also provided with a through hole connected to the mounting slot, and the wire passes through the through hole and is connected to the wiring terminal; The conductive wire is sleeved with a sealing sleeve made of rubber material, and the sealing sleeve is arranged between the through hole and the conductive wire.

8. The anti-electricity-theft metering voltage transformer according to claim 7 is characterized in that: The lead sealing bolt adopts a bolt with a cross groove and a hexagonal head; The screw rod of the lead-sealing bolt is interspersed with an elastic washer and a flat washer, the head of the lead-sealing screw is padded with an elastic washer, the elastic washer is padded with a flat washer, and the bottom end of the flat washer is attached to the anti-electricity theft cover.

9. The anti-electricity-theft metering voltage transformer according to claim 8, characterized in that: The structure provided on the anti-electricity theft cover to press the wire is called a pressure strip; The pressure strip is connected and arranged on the inner cavity side wall of the anti-electricity theft cover.

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