High-voltage signal acquisition test transformer shell structure

Abstract

The utility model discloses a high -voltage signal acquisition test mutual inductor shell structure, and mutual inductor includes coil, lead and shell, and the coil is circular ring and sets up in the shell, and the one end of lead is led out by the coil, and the shell includes casing and apron, and the casing is the square, and the casing is made of metal material, and the apron is square, and the apron four corners inboard is equipped with the pin foot respectively, and the pin foot one end passes through the apron, and the other end of lead is connected with the one end of pin foot, and the inner wall upper portion of casing is equipped with the installation positioning strip, and one inner corner upper portion of casing is equipped with pin foot positioning slot, and one corner downside of apron is equipped with the pin foot positioning insert corresponding with pin foot positioning slot, and the downside of other three corners of apron is equipped with the positioning guide pillar respectively. The utility model discloses when producing, the apron is not easy to incline, and mutual inductor installation is stable, and epoxy glue is less, and pin foot installation direction also can not make wrong, improves production efficiency, and the casing plays the shielding effect simultaneously, and can not form short wave interference.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer technology, and in particular to a housing structure for a high-voltage signal acquisition and testing instrument transformer. Background Technology

[0002] Instrument transformers are extremely important electronic components in the electronics industry. Voltage transformers are instruments used to transform voltage. The main purpose of voltage transformers is to supply power to measuring instruments and relay protection devices, to measure the voltage, power and energy of a line, or to protect valuable equipment, motors and transformers in the line when a fault occurs.

[0003] The high-voltage signal acquisition and testing transformer can convert kilovolt-level voltage / kiloampere-level current into a low-level signal that can be processed by standard instruments, achieving electrical isolation between the high-voltage side and the low-voltage measurement circuit, and triggering the relay protection device to operate through the abnormal signal output from the secondary side.

[0004] Typically, the housing of high-voltage signal acquisition and testing instrument transformers is made of plastic. During production, operators solder the coil leads to the pins on the cover plate, place the coil inside the housing, inject epoxy resin into the housing, and finally close the cover plate to allow the epoxy resin to cure naturally. This production method has several drawbacks. First, it uses a large amount of epoxy resin, making the cover plate prone to tilting during installation, leading to unstable installation of the instrument transformer. Operators are also prone to incorrect pin orientation, resulting in product scrap and low production efficiency. Second, the plastic housing cannot provide shielding, easily creating shortwave interference, which significantly affects the production and performance of the instrument transformer. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-voltage signal acquisition and testing transformer shell structure that not only prevents the cover plate from tilting during the production of current transformers, ensuring stable installation of the current transformer, requiring less epoxy adhesive, and preventing incorrect pin installation direction, thus improving production efficiency, but also provides a shielding function to prevent shortwave interference, and has a simple structure.

[0006] To solve the above-mentioned technical problems, this utility model adopts a high-voltage signal acquisition and testing transformer housing structure. The transformer includes a coil, leads, and a housing. The coil is circular and is disposed inside the housing. One end of the leads is led out from the coil. The housing includes a shell and a cover plate. The shell is cubic and made of metal. The cover plate is square. Pins are provided on the inner sides of the four corners of the cover plate. One end of the pin passes through the cover plate, and the other end of the lead is connected to one end of the pin. A mounting positioning strip is provided on the upper part of the inner wall of the shell. A pin positioning groove is provided on the upper part of one inner corner of the shell. A pin positioning insert corresponding to the pin positioning groove is provided on the lower side of one corner of the cover plate. Positioning guide posts are provided on the lower sides of the other three corners of the cover plate.

[0007] In a preferred embodiment of this utility model, four mounting positioning strips are provided, which are respectively disposed on the upper part of the four inner walls of the housing.

[0008] In a preferred embodiment of this utility model, the mounting positioning strip is rectangular and horizontally arranged, the pin positioning groove is L-shaped and horizontally arranged, and the positioning guide post is L-shaped and vertically arranged.

[0009] In a preferred embodiment of this utility model, seven pins are provided, numbered from the first pin to the seventh pin in sequence. The four corners of the cover plate are numbered from the first corner to the fourth corner in sequence. The first pin and the second pin are located inside the first corner, the third pin is located inside the second corner, the fourth pin and the fifth pin are located inside the third corner, and the sixth pin and the seventh pin are located inside the fourth corner. The positioning guide post is provided on the lower side of the first corner, the third corner, and the fourth corner, and the pin positioning insert is provided on the lower side of the second corner.

[0010] In a preferred embodiment of this utility model, the cover plate, the pin positioning insert, and the positioning guide post are integrally formed as a single piece.

[0011] By adopting the above structure, this utility model has the following beneficial effects:

[0012] This utility model discloses a high-voltage signal acquisition and testing transformer housing structure. The transformer includes a coil, leads, and a housing. The coil is circular and disposed inside the housing. One end of the leads is led out from the coil. The housing includes a shell and a cover plate. The shell is cubic and made of metal. The cover plate is square. Pins are provided on the inner sides of the four corners of the cover plate. One end of the pin passes through the cover plate, and the other end of the lead is connected to one end of the pin. A mounting positioning strip is provided on the upper part of the inner wall of the shell. A pin positioning groove is provided on the upper part of one inner corner of the shell. A pin positioning insert corresponding to the pin positioning groove is provided on the lower side of one corner of the cover plate. Positioning guide posts are provided on the lower sides of the other three corners of the cover plate. During production, the structure of the positioning strip and pin positioning groove makes the cover plate less prone to tilting. The structure of the pin positioning groove, pin positioning insert and positioning guide post ensures that the pin installation direction is not wrong. At the same time, the housing volume is reduced and less epoxy glue is used. Since the housing of this invention is made of metal material, it can shield short waves and therefore will not cause short wave interference.

[0013] This invention provides four mounting positioning strips, each positioned on the upper part of the inner wall of one of the four sides of the housing. This results in more stable installation and more accurate and reliable positioning.

[0014] The mounting positioning strip of this invention is rectangular and horizontally arranged, the pin positioning groove is L-shaped and horizontally arranged, and the positioning guide post is L-shaped and vertically arranged. This structure further facilitates the positioning and installation of the cover plate and pins.

[0015] This invention features seven pins, numbered from the first to the seventh. The four corners of the cover plate are numbered from the first to the fourth corner. The first and second pins are located inside the first corner, the third pin inside the second corner, the fourth and fifth pins inside the third corner, and the sixth and seventh pins inside the fourth corner. Positioning guide posts are located below the first, third, and fourth corners, and a pin positioning insert is located below the second corner. This design makes the pin positions clearer and facilitates pin positioning.

[0016] The cover plate, pin positioning insert, and positioning guide post of this utility model are integrally molded as a single piece. Such a structure is relatively robust and reliable.

[0017] This utility model has a simple structure, is easy to implement, simple to install and operate, and has low manufacturing cost. Attached Figure Description

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional schematic diagram of the housing structure of the high-voltage signal acquisition and testing transformer of this utility model.

[0020] Figure 2 This is a three-dimensional schematic diagram of the structure of the shell of this utility model.

[0021] Figure 3 This is a three-dimensional schematic diagram of the structure of the cover plate of this utility model.

[0022] Figure 4 This is a three-dimensional schematic diagram of the structure of the bottom surface of the cover plate of this utility model.

[0023] Figure 5 This is a three-dimensional schematic diagram of the overall structure of the outer shell of this utility model. Detailed Implementation

[0024] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The diagram illustrates the housing structure of a high-voltage signal acquisition and testing transformer. The transformer includes a coil 1, a lead wire 2, and a housing 3. The coil 1 is annular and housed within the housing 3. One end of the lead wire 2 extends from the coil 1. The housing 3 includes a shell 3-1 and a cover plate 3-2. The shell 3-1 is cubic and made of metal. The cover plate 3-2 is square. Pins 4 are provided on the inner sides of the four corners of the cover plate 3-2. One end of each pin 4 passes through the cover plate 3-2, and the other end of the lead wire 2 is connected to one end of the pin 4. A mounting positioning strip 3-3 is provided on the upper part of the inner wall of the shell 3-1. A pin positioning groove 3-4 is provided on the upper part of one inner corner of the shell 3-1. A pin positioning insert 3-5 corresponding to the pin positioning groove 3-4 is provided on the lower side of one corner of the cover plate 3-2. Positioning guide posts 3-6 are provided on the lower sides of the other three corners of the cover plate 3-2.

[0025] As a preferred embodiment of this utility model, such as Figure 1 and Figure 2 As shown, four mounting positioning strips 3-3 are provided, respectively located on the upper part of the four inner walls of the housing 3-1.

[0026] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the mounting positioning strip 3-3 is rectangular and horizontally arranged, the pin positioning groove 3-4 is L-shaped and horizontally arranged, and the positioning guide post 3-6 is L-shaped and vertically arranged.

[0027] As a preferred embodiment of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, the seven stitches 4 are arranged in sequence as follows: first stitch 4-1, second stitch 4-2, third stitch 4-3, fourth stitch 4-4, fifth stitch 4-5, sixth stitch 4-6, and seventh stitch 4-7. The four corners of the cover plate 3-2 are arranged in sequence as first corner 3-2-1, second corner 3-2-2, third corner 3-2-3, and fourth corner 3-2-4. The first stitch 4-1 and second stitch 4-2 are located inside the first corner 3-2-1. The third pin 4-3 is located inside the second corner 3-2-2, the fourth pin 4-4 and the fifth pin 4-5 are located inside the third corner 3-2-3, the sixth pin 4-6 and the seventh pin 4-7 are located inside the fourth corner 3-2-4, the positioning guide post 3-6 is provided on the lower side of the first corner 3-2-1, the third corner 3-2-3 and the fourth corner 3-2-4 respectively, and the pin positioning insert 3-5 is provided on the lower side of the second corner 3-2-2.

[0028] As a preferred embodiment of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, the cover plate 3-2, the pin positioning insert 3-5, and the positioning guide post 3-6 are integrally formed as a single piece.

[0029] In practical applications, the shell 3-1 is made of iron.

[0030] In the production of this utility model, the coil 1 is placed inside the housing 3-1, one end of the lead wire 2 is connected to the coil 1, and the other end of the lead wire 2 is welded to the pin 4 on the bottom surface of the cover plate 3-2. Epoxy glue is injected into the housing 3-1, and then the pin positioning insert 3-5 on the cover plate 3-2 is aligned with the pin positioning groove 3-4 inside the housing 3-1. Then the cover plate 3-2 is closed, and the epoxy glue is allowed to solidify and fix.

[0031] After testing, it was found that during the production of this utility model, the cover plate is not easy to tilt, the current transformer is installed stably, the amount of epoxy glue used is less, the amount of epoxy glue used per product is reduced from the original 45g to 37g, the pin installation direction will not be confused by the operator, thus improving production efficiency. The iron shell also plays a shielding role and will not form shortwave interference. Moreover, this utility model has a simple structure and has achieved good economic benefits.

Claims

1. A high-voltage signal acquisition and testing transformer housing structure, the transformer comprising a coil (1), a lead wire (2), and a housing (3), wherein the coil (1) is annular and disposed within the housing (3), and one end of the lead wire (2) is led out from the coil (1), characterized in that: The outer shell (3) includes a shell (3-1) and a cover plate (3-2). The shell (3-1) is cubic and made of metal. The cover plate (3-2) is square. The cover plate (3-2) has pins (4) on the inner sides of its four corners. One end of the pin (4) passes through the cover plate (3-2). The other end of the lead wire (2) is connected to one end of the pin (4). The upper part of the inner wall of the shell (3-1) is provided with a mounting positioning strip (3-3). The upper part of one inner corner of the shell (3-1) is provided with a pin positioning groove (3-4). The lower side of one corner of the cover plate (3-2) is provided with a pin positioning insert (3-5) corresponding to the pin positioning groove (3-4). The lower side of the other three corners of the cover plate (3-2) is provided with positioning guide posts (3-6).

2. The housing structure of the high-voltage signal acquisition and testing transformer according to claim 1, characterized in that: Four mounting positioning strips (3-3) are provided, and are respectively located on the upper part of the four inner walls of the housing (3-1).

3. The housing structure of the high-voltage signal acquisition and testing transformer according to claim 1, characterized in that: The mounting positioning strip (3-3) is rectangular and horizontally arranged, the pin positioning groove (3-4) is L-shaped and horizontally arranged, and the positioning guide post (3-6) is L-shaped and vertically arranged.

4. The housing structure of the high-voltage signal acquisition and testing transformer according to claim 1, characterized in that: The needles (4) are arranged in seven parts, namely, the first needle (4-1), the second needle (4-2), the third needle (4-3), the fourth needle (4-4), the fifth needle (4-5), the sixth needle (4-6), and the seventh needle (4-7). The four corners of the cover plate (3-2) are respectively the first corner (3-2-1), the second corner (3-2-2), the third corner (3-2-3), and the fourth corner (3-2-4). The first needle (4-1) and the second needle (4-2) are located inside the first corner (3-2-1). The third pin (4-3) is located inside the second corner (3-2-2), the fourth pin (4-4) and the fifth pin (4-5) are located inside the third corner (3-2-3), the sixth pin (4-6) and the seventh pin (4-7) are located inside the fourth corner (3-2-4), the positioning guide post (3-6) is provided on the lower side of the first corner (3-2-1), the third corner (3-2-3) and the fourth corner (3-2-4), and the pin positioning insert (3-5) is provided on the lower side of the second corner (3-2-2).

5. The housing structure of the high-voltage signal acquisition and testing transformer according to claim 1, characterized in that: The cover plate (3-2), pin positioning insert (3-5), and positioning guide post (3-6) are integrally formed as a single piece.

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