Waterproof current transformer

Abstract

The utility model relates to a waterproof current transformer, and relates to the technical field of current transformers, the waterproof current transformer comprises a shell, a mutual inductance assembly located in the shell and a shell cover installed on the shell, and the shell is also internally provided with an insulating filler used for filling a cavity; an aviation plug is arranged on the outer side face of the shell and comprises a sleeve fixedly arranged on the outer side face of the shell and a plurality of contact pins fixedly arranged in the sleeve, and a cable used for connecting the contact pins and the mutual inductance assembly is arranged in the shell. According to the invention, due to the arrangement of the aviation plug, the six pins are integrated in the sleeve to form the aviation plug, an external circuit can be connected with the three groups of mutual inductance assemblies in the shell through a corresponding connector clip, and the plugging cooperation has good sealing protection performance. Therefore, the possibility of external water vapor or dust permeation is reduced, and the corresponding safety performance is improved.

Description

Technical Field

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

[0002] The three-phase integrated current transformer is an advanced device used for measuring and protecting power systems. It integrates three independent current transformers into one, significantly improving measurement accuracy and system reliability. This design not only simplifies the power system structure but also reduces the space occupied by the equipment, making the power system layout more compact and efficient. Three-phase integrated current transformers play a vital role in power systems and are widely used in current measurement, energy metering, fault protection, and other applications.

[0003] In related technology, a three-phase current transformer includes a housing and three current transformer components. Each current transformer component contains a primary winding and a secondary winding. These three components are cleverly integrated within the housing, minimizing interference between them through a rational structural design. The housing is equipped with six exposed binding posts. Each group of two binding posts corresponds to a current transformer component. A set of incoming and outgoing cables connects to two binding posts in the same group.

[0004] However, in practical applications, especially in humid or harsh environments, these exposed terminal blocks present a potential risk. Water vapor or moisture intrusion can cause a short circuit between the terminal block and the external cable, disrupting not only the normal operation of the equipment but also potentially threatening the overall safety of the power system. This presents room for improvement. Utility Model Content

[0005] The purpose of this application is to provide a waterproof current transformer to solve the problem of insufficient waterproof performance of the current transformer in the above-mentioned related art.

[0006] The present application provides a waterproof current transformer adopting the following technical solution:

[0007] A waterproof current transformer comprises a housing, a mutual inductance component located within the housing, and a housing cover mounted on the housing. The housing is further provided with an insulating filler for filling a cavity. An aviation plug is provided on the outer surface of the housing. The aviation plug comprises a sleeve fixed to the outer side of the housing and a plurality of pins fixed within the sleeve. A cable for connecting the pins and the mutual inductance component is provided within the housing.

[0008] By adopting the above technical solution, six pins are integrated inside the sleeve to form an aviation plug. The external circuit can be connected to the three sets of mutual inductance components inside the shell at the same time through a corresponding connector. This plug-in combination has good sealing and protection performance, thereby reducing the possibility of external moisture or dust infiltration and improving the corresponding safety performance.

[0009] Optionally, a fixing retaining ring is fixed on the outer periphery of the sleeve, a plurality of fixing through holes are opened on the fixing retaining ring, a fixing screw hole is opened on the shell, and a fixing screw is provided on the outside of the shell and passes through the fixing through holes and then screwed into the fixing screw hole.

[0010] By adopting the above technical solution, when the sleeve needs to be fixed on the shell, a fixing screw is used to pass through the fixing through hole and then screwed into the corresponding fixing screw hole, thereby achieving the installation and fixation of the sleeve and reducing the possibility of it loosening during subsequent installation.

[0011] Optionally, an elastic gasket is sleeved on the outer periphery of the sleeve and is located between the fixed retaining ring and the shell.

[0012] By adopting the above technical solution, the elastic washer is installed between the fixed retaining ring and the housing. After the sleeve is installed, the elastic washer is squeezed and then tightened in the reverse direction, thereby improving the installation stability of the sleeve.

[0013] Optionally, a sealing cover capable of covering the outer edge of the sleeve opening is provided on the outside of the shell.

[0014] By adopting the above technical solution, when the aviation plug is not in use, the opening of the sleeve can be sealed with a sealing cover to reduce the possibility of external dust adhering to the inside of the sleeve.

[0015] Optionally, an annular convex strip is fixedly provided on the inner side surface of the sealing cover, and an annular groove for inserting the annular convex strip is opened on the outer periphery of the sleeve.

[0016] By adopting the above technical solution, when the sealing cover is installed on the upper part of the sleeve, the annular ridge on the sealing cover is inserted into the annular groove on the outer periphery of the sleeve, thereby further improving the installation stability of the sealing cover.

[0017] Optionally, a connecting strip for connecting with the sealing cover is fixed on the outer periphery of the elastic gasket.

[0018] By adopting the above technical solution, the possibility of losing the sealing cover is reduced due to the provision of the connecting strip.

[0019] Optionally, an elastic sealing sleeve is fixed on the side edge of the fixed retaining ring away from the shell, and a clearance is provided between the inner wall of the elastic sealing sleeve and the outer peripheral surface of the sleeve, and the outer peripheral surface of the sealing cover can abut against the inner wall of the elastic sealing sleeve.

[0020] By adopting the above technical solution, when the sealing cover is installed on the outer periphery of the opening of the sleeve, the outer peripheral surface of the sealing cover can be inserted into the clearance gap and abut against the inner wall of the elastic sealing sleeve, thereby improving the sealing performance of the sealing cover to the upper opening of the sleeve. When the external connector is plugged into the aviation plug, a part of the external connector can also be inserted into the clearance gap, thereby improving the corresponding protection performance.

[0021] Optionally, the inner edge of the end of the elastic sealing sleeve facing the shell is provided with a recessed groove for inserting the outer edge of the fixed retaining ring, and the outer peripheral edge of the fixed retaining ring is fixedly connected to the inner wall of the recessed groove.

[0022] By adopting the above technical solution, the installation stability of the elastic sealing sleeve is improved.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Due to the setting of the aviation plug, six pins are integrated inside the sleeve to form an aviation plug. The external circuit can be connected to the three sets of mutual inductance components inside the shell at the same time through a corresponding connector. This plug-in combination has good sealing protection performance, thereby reducing the possibility of external moisture or dust infiltration and improving the corresponding safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0027] Figure 2 This is a partial cross-sectional structural diagram of the installation and matching of the aviation plug embodied in Example 1 of the present application;

[0028] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0029] Figure 4 yes Figure 2 An enlarged schematic diagram of part B;

[0030] Figure 5 This is a schematic structural diagram of the installation and coordination of the elastic sealing sleeve according to Example 2 of the present application;

[0031] Figure 6It is a schematic diagram of the partial cross-sectional structure of the elastic sealing sleeve installation and cooperation according to Example 2 of the present application.

[0032] In the figure, 1. Shell; 11. Fixing screw hole; 2. Shell cover; 3. Aviation plug; 31. Sleeve; 311. Fixing retaining ring; 3111. Fixing through hole; 312. Annular groove; 32. Pin; 4. Fixing screw; 5. Elastic washer; 51. Connecting strip; 6. Sealing cover; 61. Annular ridge; 7. Elastic sealing sleeve; 71. Relief groove. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] Example 1:

[0035] Reference Figure 1 and Figure 2 A waterproof current transformer includes a housing 1, three mutual inductance components (not shown) located within the housing 1, and a housing cover 2 mounted on the housing 1. The housing 1 also includes an insulating filler (injection-molded epoxy resin, not shown) for filling a cavity.

[0036] An aviation plug 3 is provided on the outer surface of the housing 1. The aviation plug 3 includes a sleeve 31 fixed to the outer side of the housing 1 and six pins 32 embedded and fixed in the sleeve 31. Two pins 32 form a group, and the same group of pins 32 is connected to the corresponding mutual inductance component. A cable (not shown in the figure) for connecting the pins 32 and the mutual inductance component is provided in the housing 1.

[0037] Reference Figure 2 and Figure 3 A fixing retaining ring 311 is integrally formed on the outer periphery of the sleeve 31, wherein the fixing retaining ring 311 is provided with a plurality of fixing through holes 3111, and the shell 1 is provided with fixing screw holes 11 corresponding to the fixing through holes 3111. The outside of the shell 1 is provided with fixing screws 4 that pass through the fixing through holes 3111 and are screwed into the fixing screw holes 11; thereby, the sleeve 31 and the shell 1 are installed and fixed.

[0038] Reference Figure 2 and Figure 3 An elastic gasket 5 is sleeved on the outer periphery of the sleeve 31 and is located between the fixed retaining ring 311 and the shell 1, wherein the elastic gasket 5 is made of rubber; a sealing cover 6 is provided on the outside of the shell 1 and can cover the outer edge of the opening of the sleeve 31, and a connecting strip 51 for connecting the sealing cover 6 is fixed on the outer periphery of the elastic gasket 5; with this arrangement, when the aviation plug is not in use, the sealing cover 6 can be used to seal the opening of the sleeve 31, reducing the possibility of external dust adhering to the inside of the sleeve 31, and at the same time, the installation stability of the sleeve 31 is increased through the elastic gasket 5.

[0039] Reference Figure 2 and Figure 4 An annular ridge 61 made of rubber is integrally formed on the inner side surface of the sealing cover 6, and an annular groove 312 for inserting the annular ridge 61 is provided on the outer periphery of the sleeve 31, thereby further improving the installation stability of the sealing cover 6; an external thread is provided on the outer periphery of the sleeve 31 below the annular groove 312, and an external plug-in component can be threadedly sleeved on the outer periphery of the sleeve 31, thereby improving the stability during insertion.

[0040] The implementation principle of the embodiment of this application is:

[0041] The six pins 32 are integrated inside the sleeve 31 to form an aviation plug 3. The external circuit can be connected to the three sets of mutual inductance components inside the shell 1 at the same time through a corresponding connector; when the aviation plug is not in use, the opening of the sleeve 31 can be sealed with a sealing cover 6 to reduce the possibility of external dust adhering to the inside of the sleeve 31, and the installation stability of the sleeve 31 is also increased through the elastic gasket 5.

[0042] Example 2:

[0043] Reference Figure 5 and Figure 6 The difference between the embodiment of the present application and the embodiment 1 is that an elastic sealing sleeve 7 is fixed on the side edge of the fixed retaining ring 311 away from the housing 1, and a clearance is provided between the inner wall of the elastic sealing sleeve 7 and the outer peripheral surface of the sleeve 31;

[0044] When the sealing cover 6 is installed on the outer periphery of the opening of the sleeve 31, the outer peripheral surface of the sealing cover 6 can be inserted into the clearance gap and abut against the inner wall of the elastic sealing sleeve 7; when the external connector (not shown in the figure) is plugged into the aviation plug 3, a part of the external connector can also be inserted into the clearance gap, thereby improving the corresponding protection performance.

[0045] Reference Figure 6 The inner edge of the end opening of the elastic sealing sleeve 7 facing the shell 1 is provided with a recessed groove 71 for inserting the outer edge of the fixed retaining ring 311. The outer edge of the fixed retaining ring 311 is fixedly connected to the inner wall of the recessed groove 71, thereby further improving the installation stability of the elastic sealing sleeve 7.

[0046] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A waterproof current transformer, comprising a housing (1), a mutual inductance component located in the housing (1), and a housing cover (2) mounted on the housing (1), wherein an insulating filler for filling a cavity is further provided in the housing (1); It is characterized in that An aviation plug (3) is provided on the outer side of the housing (1), and the aviation plug (3) comprises a sleeve (31) fixed on the outer side of the housing (1) and a plurality of pins (32) fixed in the sleeve (31). A cable for connecting the pins (32) and a mutual inductance component is provided in the housing (1).

2. The waterproof current transformer according to claim 1, characterized in that: A fixed retaining ring (311) is fixed on the outer periphery of the sleeve (31), a plurality of fixing through holes (3111) are provided on the fixing retaining ring (311), a fixing screw hole (11) is provided on the shell (1), and a fixing screw (4) is provided on the outside of the shell (1) and passes through the fixing through hole (3111) and is screwed into the fixing screw hole (11).

3. The waterproof current transformer according to claim 2, characterized in that: An elastic washer (5) is sleeved on the outer periphery of the sleeve (31) and is located between the fixed retaining ring (311) and the housing (1).

4. The waterproof current transformer according to claim 3, characterized in that: The outside of the housing (1) is provided with a sealing cover (6) capable of covering the outer edge of the opening of the sleeve (31).

5. The waterproof current transformer according to claim 4, characterized in that: An annular convex strip (61) is fixedly provided on the inner side surface of the sealing cover (6), and an annular groove (312) for inserting the annular convex strip (61) is provided on the outer periphery of the sleeve (31).

6. The waterproof current transformer according to claim 4, characterized in that: A connecting strip (51) for connecting with the sealing cover (6) is fixedly provided on the outer periphery of the elastic gasket (5).

7. The waterproof current transformer according to claim 4, characterized in that: An elastic sealing sleeve (7) is fixedly provided on the side edge of the fixed retaining ring (311) away from the housing (1), and a clearance is provided between the inner wall of the elastic sealing sleeve (7) and the outer peripheral surface of the sleeve (31), so that the outer peripheral surface of the sealing cover (6) can abut against the inner wall of the elastic sealing sleeve (7).

8. The waterproof current transformer according to claim 7, characterized in that: The inner edge of the end of the elastic sealing sleeve (7) facing the housing (1) is provided with a recessed groove (71) for inserting the outer edge of the fixed retaining ring (311), and the outer edge of the fixed retaining ring (311) is fixedly connected to the inner wall of the recessed groove (71).

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