Open type transformer housing and assembly method

Abstract

An open-type transformer housing and an assembly method. The main purpose is to solve the problem that most current transformer housings have a simple accommodating cavity, so that each shielding layer is arranged in the same accommodating cavity, which easily generates a closed loop and affects the measurement accuracy. The characteristic is that: the housing is provided with a first cavity (2) for installing an inner shielding layer, a second cavity (3) for installing a side shielding layer, and a third cavity (4) for installing an outer shielding layer, and the first cavity, the second cavity and the third cavity are isolated from each other or any two of them are isolated from each other. The present invention provides an open-type transformer housing and an assembly method, wherein the housing is provided with a plurality of cavities for installing shielding layers, thereby reducing the possibility of forming a completely closed loop and increasing the measurement accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of mutual inductors, and in particular relates to an open type mutual inductor housing and an assembly method thereof. Background Art

[0002] Open-type current transformers are mainly used in power distribution system renovation projects. They are easy to install, do not need to remove the primary busbar, and can be operated with power on, which does not affect the normal power consumption of customers. They save manpower, material resources, and financial resources for users' renovation projects and improve efficiency. This series of current transformers can be used in conjunction with relay protection, measurement, and metering devices.

[0003] At present, the housing of the current transformer is mostly a simple accommodating cavity, so that each shielding layer is arranged in the same accommodating cavity, which is easy to produce a closed loop and affect the measurement accuracy. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides an open type transformer housing and an assembly method, which mainly solves the problem that most of the current transformer housings are simple accommodating chambers, so that each shielding layer is arranged in the same accommodating chamber, which is easy to produce a closed loop and affect the measurement accuracy.

[0005] The technical solution adopted by the present invention is:

[0006] The open type transformer housing comprises a housing, wherein a first cavity for installing an inner shielding layer, a second cavity for installing a side shielding layer and a third cavity for installing an outer shielding layer are arranged in the housing, wherein the first cavity, the second cavity and the third cavity are isolated from each other or any two of them are isolated from each other.

[0007] The first chamber is communicated with the second chamber, and the second chamber is isolated from the third chamber.

[0008] The shell comprises an inner wall, a first blocking wall is arranged in the shell, and the first cavity is formed between the first blocking wall and the inner wall.

[0009] The first retaining wall is provided with a plurality of through slots for the side shielding layer to partially pass through.

[0010] A second baffle wall is disposed in the shell, the shell includes an outer wall, and the third cavity is formed between the second baffle wall and the outer wall.

[0011] The second cavity is formed between the second blocking wall and the first blocking wall.

[0012] It also includes an elastic insulating member, wherein a portion of the elastic insulating member is disposed in the third cavity, and a portion of the elastic insulating member is disposed in the second cavity.

[0013] The second retaining wall is provided with a receiving groove for accommodating the elastic insulating member.

[0014] The shell comprises a base and an upper cover which are detachably connected or openably connected.

[0015] One end of the base is hingedly matched with the upper cover, and the other end is connected to the base through a clamping assembly.

[0016] The clamping assembly is a clamping block arranged on the base and a clamping hook arranged on the upper cover, and the clamping hooks are clamped and matched with each other.

[0017] The third cavity comprises a third upper cavity and a third lower cavity, wherein the third upper cavity is arranged on the upper cover, and the third lower cavity is arranged on the base.

[0018] The third upper chamber and the third lower chamber are isolated from each other.

[0019] The diameters of the third upper cavity and the third lower cavity are different.

[0020] The inner circle diameter of the third lower cavity is greater than the outer circle diameter of the third upper cavity.

[0021] A boss positioned by the side shielding layer is provided in the third upper cavity.

[0022] The boss is provided with screw holes for fixing the side shielding layer.

[0023] The first cavity includes a first upper cavity and a first lower cavity, the first upper cavity is arranged on the upper cover, and the first lower cavity is arranged on the base.

[0024] The first upper chamber is communicated with the first lower chamber.

[0025] A partition is provided between the first upper chamber and the first lower chamber.

[0026] A slot for installing the coil frame baffle is arranged in the base.

[0027] The shell is provided with an output terminal hole for secondary wiring.

[0028] The base includes a first base and a second base arranged in parallel, and the first base and the second base are detachably connected or welded.

[0029] A positioning protrusion is provided on the opposite surface of the first base and the second base, and a positioning groove which is snap-fitted with the positioning protrusion is provided on the second base.

[0030] The upper cover comprises a first upper cover and a second upper cover which are arranged in parallel, and the first upper cover and the second upper cover are detachably connected or welded.

[0031] The method for assembling a transformer housing comprises the following steps:

[0032] Step 1: Upper shell assembly, including the following steps:

[0033] Step 1.1: Install the side shielding layer in the second cavity of the first upper cover and the second upper cover respectively, and allow part of the side shielding layer to pass through the through slot and extend into the first cavity;

[0034] Step 1.2, press the gasket against the side shielding layer and connect it to the boss on the shell through the bolt to lock the side shielding layer;

[0035] Step 1.3, installing an inner shielding layer in the first upper cavity, installing an upper half magnetic core in the second cavity, and installing an outer shielding layer in the third cavity;

[0036] Step 1.4, install the elastic insulating member into the receiving groove;

[0037] Step 1.5, connecting the first upper cover and the second upper cover to each other by ultrasonic welding;

[0038] Step 2: Base assembly, including the following steps:

[0039] Step 2.1, installing the side shielding layer in the second cavity of the first base and the second base respectively, and allowing part of the side shielding layer to pass through the through slot and extend into the first cavity;

[0040] Step 2.2, installing an inner shielding layer in the first cavity of the first base, installing a coil frame with a lower half magnetic core fixed in the second cavity, and installing an outer shielding layer in the third cavity;

[0041] Step 2.3, connecting the first base and the second base to each other by ultrasonic welding;

[0042] Step 3: Hingedly connect the top cover to the base at one end through a rotating shaft and snap-fit ​​the other end.

[0043] The beneficial effects of the present invention are as follows: the present invention provides an open-type transformer housing and an assembly method, wherein a plurality of cavities are provided in the housing for installing a shielding layer, thereby reducing the possibility of forming a completely closed loop and increasing measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention.

[0045] Figure 2 The figure is an exploded schematic diagram of an embodiment of the present invention.

[0046] Figure 3 It is an internal schematic diagram of an embodiment of the present invention.

[0047] Figure 4 FIG. 4 is an internal schematic diagram of a second embodiment of the present invention.

[0048] Figure 5 It is a partial cross-sectional schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings: As shown in the figure, an open-type transformer housing includes a housing 1, wherein a first cavity 2 for installing an inner shielding layer, a second cavity 3 for installing a side shielding layer, and a third cavity 4 for installing an outer shielding layer are provided in the housing, wherein the first cavity, the second cavity, and the third cavity are isolated from each other or any two of them are isolated from each other. The present invention provides an open-type transformer housing and an assembly method, wherein a plurality of cavities are provided in the housing for installing a shielding layer, thereby reducing the possibility of forming a closed loop and increasing measurement accuracy.

[0050] In this embodiment, if Figure 1-5 As shown, the first cavity is communicated with the second cavity, and the second cavity is isolated from the third cavity.

[0051] In this embodiment, if Figure 3 As shown, the housing includes an inner wall 101, a first retaining wall 11 is disposed inside the housing, and the first cavity is formed between the first retaining wall and the inner wall. The first retaining wall can be annular or in other shapes and can be set according to actual needs.

[0052] In this embodiment, if Figure 3 As shown, the first retaining wall is provided with a plurality of through slots 111 for the side shielding layer to partially pass through. The side shielding layer passes through and contacts with the inner shielding layer to form a shielding loop. The mutual contact forms a shielding loop, surrounds the interference source, prevents the interference magnetic field from spreading outward, and effectively shields the interference of the external magnetic field, thereby achieving a better shielding effect and improving the accuracy of the measurement data.

[0053] In this embodiment, if Figure 3 As shown, the shell is provided with a second baffle 12, and the shell includes an outer wall 102, and the third cavity is formed between the second baffle and the outer wall. The second baffle can be in contact with the outer wall at both ends to form a closed space, and the second baffle is provided on both the first upper cover and the second upper cover, and after installation, the two baffles are closed to form a complete third cavity.

[0054] In this embodiment, if Figure 3 As shown, the second cavity is formed between the second blocking wall and the first blocking wall.

[0055] In this embodiment, if Figure 3 As shown, it also includes an elastic insulating member 7, wherein the elastic insulating member is partially disposed in the third cavity and the elastic insulating member is partially disposed in the second cavity. The elastic insulating member may be a rubber gasket, which is used to compress the magnetic core.

[0056] In this embodiment, if Figure 3 As shown, the second retaining wall is provided with a receiving groove 121 for receiving the elastic insulating member.

[0057] In this embodiment, if Figure 1 As shown, the shell includes a base 5 and an upper cover 6 which are detachably connected or openably connected.

[0058] In this embodiment, if Figure 1 As shown, one end of the base is hingedly engaged with the upper cover, and the other end is connected to the base via a snap-on assembly.

[0059] In this embodiment, if Figure 1 As shown, the clamping assembly is a clamping block 81 provided on the base and a clamping hook 82 provided on the upper cover, and the clamping hooks are clamped and matched with each other, so as to be convenient to open and close.

[0060] In this embodiment, if Figure 3 As shown, the third cavity includes a third upper cavity 41 and a third lower cavity 42, wherein the third upper cavity is disposed on the upper cover, and the third lower cavity is disposed on the base.

[0061] In this embodiment, if Figure 3 As shown, the third upper chamber and the third lower chamber are isolated from each other.

[0062] In this embodiment, if Figure 3 As shown, the diameters of the third upper cavity and the third lower cavity are not equal.

[0063] In this embodiment, if Figure 3 As shown, the inner diameter of the third lower chamber is larger than the outer diameter of the third upper chamber, thereby preventing the formation of a closed loop.

[0064] In this embodiment, if Figure 3 As shown, the third upper cavity is provided with a boss 411 for positioning the side shielding layer. When installing, the shielding layer is placed in the corresponding position, and the side shielding layer is provided with a positioning hole corresponding to the boss.

[0065] In this embodiment, if Figure 3 As shown, the boss is provided with screw holes 412 for fixing the side shielding layer. After the positioning is completed, the screws are installed, and preferably a gasket is also provided.

[0066] In this embodiment, if Figure 3 As shown, the first cavity includes a first upper cavity 21 and a first lower cavity 22, the first upper cavity is arranged on the upper cover, and the first lower cavity is arranged on the base.

[0067] In this embodiment, if Figure 3As shown, the first upper cavity is connected to the first lower cavity, so as to better shield external electromagnetic interference.

[0068] In this embodiment, if Figure 4 As shown, a partition plate 23 is provided between the first upper chamber and the first lower chamber to reduce the possibility of forming a closed loop.

[0069] In this embodiment, if Figure 3 As shown, a slot 51 for installing the coil frame baffle is provided in the base.

[0070] In this embodiment, if Figure 1 As shown, the housing is provided with an output terminal hole 14 for secondary wiring.

[0071] In this embodiment, if Figure 2 As shown, the base includes a first base 601 and a second base 602 arranged in parallel, and the first base and the second base are detachably connected or welded.

[0072] In this embodiment, if Figure 5 As shown, a positioning protrusion 5011 is provided on the opposite surface of the first base and the second base, and a positioning groove 5021 is provided on the second base to be snap-fitted with the positioning protrusion. The positioning and installation are convenient.

[0073] Embodiment 1, an open-type transformer housing, comprises a housing, wherein a first cavity for installing an inner shielding layer, a second cavity for installing a side shielding layer and a third cavity for installing an outer shielding layer are provided in the housing, wherein the first cavity is connected to the second cavity, and the second cavity is isolated from the third cavity. The shell comprises an inner wall, a first baffle is arranged in the shell, the first cavity is formed between the first baffle and the inner wall, a plurality of through slots for the side shielding layer to partially pass through are arranged on the first baffle, a second baffle is arranged in the shell, an outer wall is arranged between the second baffle and the outer wall, the second cavity is formed between the second baffle and the first baffle, and an elastic insulating member is arranged in part in the third cavity, the elastic insulating member is arranged in part in the second cavity, and a receiving slot for the elastic insulating member to be loaded is arranged on the second baffle. The shell comprises a base and an upper cover that can be detachably connected or opened and closed, one end of the base is hingedly matched with the upper cover, and the other end is connected with the base through a snap-on assembly, the snap-on assembly is a block arranged on the base and a hook arranged on the upper cover, and the hook is snap-on-matched with the hook. The third cavity comprises a third upper cavity and a third lower cavity, the third upper cavity is arranged on the upper cover, and the third lower cavity is arranged on the base. The inner diameter of the third lower cavity is greater than the outer diameter of the third upper cavity. The second upper cavity is provided with a boss for positioning the side shielding layer. The boss is provided with a screw hole for fixing the side shielding layer. The first cavity includes a first upper cavity and a first lower cavity, the first upper cavity is provided on the upper cover, and the first lower cavity is provided on the base. The first upper cavity is connected to the first lower cavity.

[0074] Embodiment 2, an open-type transformer housing, comprises a housing, wherein a first cavity for installing an inner shielding layer, a second cavity for installing a side shielding layer and a third cavity for installing an outer shielding layer are provided in the housing, wherein the first cavity is connected to the second cavity, and the second cavity is isolated from the third cavity. The shell includes an inner wall, a first baffle is provided in the shell, the first cavity is formed between the first baffle and the inner wall, the first baffle is provided with a plurality of through slots for the side shielding layer to partially pass through, a second baffle is provided in the shell, the shell includes an outer wall, the third cavity is formed between the second baffle and the outer wall, the second cavity is formed between the second baffle and the first baffle, and an elastic insulating member is provided, the elastic insulating member is partially provided in the third cavity, the elastic insulating member is partially provided in the second cavity, and the second baffle is provided with a receiving slot for the elastic insulating member to be loaded, the shell includes a base and an upper cover that can be detachably connected or opened and closed, one end of the base is hingedly matched with the upper cover, and the other end is connected to the base through a snap-on assembly, the snap-on assembly is a block provided on the base and a hook provided on the upper cover, and the hook is snap-on-matched with the hook. The third cavity includes a third upper cavity and a third lower cavity, the third upper cavity is provided on the upper cover, and the third lower cavity is provided on the base. The third upper cavity is isolated from the third lower cavity. The inner diameter of the third lower cavity is larger than the outer diameter of the third upper cavity. A boss for positioning the side shielding layer is provided in the third upper cavity. A screw hole for fixing the side shielding layer is provided on the boss. The first cavity includes a first upper cavity and a first lower cavity, the first upper cavity is provided on the upper cover, and the first lower cavity is provided on the base. A partition plate 23 is provided between the first upper cavity and the first lower cavity.

[0075] In this embodiment, if Figure 2 As shown, the upper cover includes a first upper cover 501 and a second upper cover 502 arranged in parallel, and the first upper cover and the second upper cover are detachably connected or welded.

[0076] In this embodiment, as shown in the figure, the assembly method of the open-type transformer housing includes the following steps:

[0077] Step 1: Upper shell assembly, including the following steps:

[0078] Step 1.1: Install the side shielding layer in the second cavity of the first upper cover and the second upper cover respectively, and allow part of the side shielding layer to pass through the through slot and extend into the first cavity;

[0079] Step 1.2, press the gasket against the side shielding layer and connect it to the boss on the shell through the bolt to lock the side shielding layer;

[0080] Step 1.3, installing an inner shielding layer in the first upper cavity, installing an upper half magnetic core in the second cavity, and installing an outer shielding layer in the third cavity;

[0081] Step 1.4, install the elastic insulating member into the receiving groove;

[0082] Step 1.5, connecting the first upper cover and the second upper cover to each other by ultrasonic welding;

[0083] Step 2: Base assembly, including the following steps:

[0084] Step 2.1, installing the side shielding layer in the second cavity of the first base and the second base respectively, and allowing part of the side shielding layer to pass through the through slot and extend into the first cavity;

[0085] Step 2.2, installing an inner shielding layer in the first cavity of the first base, installing a coil frame with a lower half magnetic core fixed in the second cavity, and installing an outer shielding layer in the third cavity;

[0086] Step 2.3, connecting the first base and the second base to each other by ultrasonic welding;

[0087] Step 3: Hingedly connect the top cover to the base at one end through a rotating shaft and snap-fit ​​the other end.

[0088] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0090] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. An open-type transformer housing, comprising a housing (1), characterized in that: a first cavity (2) for installing an inner shielding layer, a second cavity (3) for installing a side shielding layer, and a third cavity (4) for installing an outer shielding layer are provided in the housing, the first cavity, the second cavity, and the third cavity are isolated from each other or any two of them are isolated from each other; the first cavity, the second cavity, and the third cavity are arranged concentrically; The shell comprises an inner wall (101), a first retaining wall (11) is provided in the shell, and the first cavity is formed between the first retaining wall and the inner wall; A second retaining wall (12) is provided in the shell, the shell comprises an outer wall (102), and the third cavity is formed between the second retaining wall and the outer wall; It also includes an elastic insulating member (7), wherein a portion of the elastic insulating member is disposed in the third cavity, and a portion of the elastic insulating member is disposed in the second cavity; The first cavity is communicated with the second cavity, and the second cavity is isolated from the third cavity; The first retaining wall is provided with a plurality of through slots (111) for the side shielding layer to partially pass through; The second cavity is formed between the second blocking wall and the first blocking wall.

2. The open type transformer housing according to claim 1, characterized in that: The second retaining wall is provided with a receiving groove (121) for accommodating the elastic insulating component.

3. The open type transformer housing according to claim 1, characterized in that: The housing comprises a base (5) and an upper cover (6) which are detachably connected or openably connected.

4. The open type transformer housing according to claim 3, characterized in that: One end of the base is hingedly matched with the upper cover, and the other end is connected to the upper cover through a clamping assembly.

5. The open type transformer housing according to claim 4, characterized in that: The clamping assembly comprises a clamping block (81) provided on the base and a clamping hook (82) provided on the upper cover, and the clamping block is clamped and matched with the clamping hook.

6. The open type transformer housing according to claim 5, characterized in that: The third chamber comprises a third upper chamber (41) and a third lower chamber (42); the third upper chamber is arranged on the upper cover, and the third lower chamber is arranged on the base.

7. The open type transformer housing according to claim 6, characterized in that: The third upper chamber and the third lower chamber are isolated from or closed to each other.

8. The open type transformer housing according to claim 6, characterized in that: A boss (411) for positioning the side shielding layer is provided in the third upper cavity.

9. The open type transformer housing according to claim 8, characterized in that: The boss is provided with a screw hole (412) for fixing the side shielding layer.

10. The open type transformer housing according to claim 8, characterized in that: The first cavity comprises a first upper cavity (21) and a first lower cavity (22), the first upper cavity being arranged on the upper cover, and the first lower cavity being arranged on the base.

11. The open type transformer housing according to claim 10, characterized in that: The first upper chamber is communicated with the first lower chamber.

12. The open type transformer housing according to claim 3, characterized in that: A slot (51) for installing the coil frame baffle is provided in the base.

13. The open type transformer housing according to claim 1, characterized in that: The housing is provided with an output terminal hole (14) for secondary wiring.

14. The open type transformer housing according to claim 3, characterized in that: The base comprises a first base (601) and a second base (602) which are arranged in parallel, and the first base and the second base are detachably connected or welded.

15. The open type transformer housing according to claim 14, characterized in that: A positioning protrusion (5011) is provided on the opposing surfaces of the first base and the second base, and a positioning groove (5021) is provided on the second base to be snap-fitted with the positioning protrusion.

16. The open type transformer housing according to claim 3 or 14, characterized in that: The upper cover comprises a first upper cover (501) and a second upper cover (502) which are arranged in parallel, and the first upper cover and the second upper cover are detachably connected or welded.

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