Combined mutual inductor

Abstract

The utility model relates to a combined mutual inductor, which comprises a cylindrical cavity arranged on the front side of a casing, and a gland arranged on the outer side of the cylindrical cavity. The column cavity comprises a cover groove and a column groove which are sequentially formed by the machine shell in a stepped concave mode, the upper edge of the gland is hinged to the upper portion of the cover groove, and the voltage collecting column is arranged in the column groove. The lower part of the gland is provided with a wire pressing port, and the lower edge of the gland is sleeved and fixedly pasted with an elastic rubber sealing edge. A heat dissipation aluminum sheet is arranged on the gland; the voltage acquisition column comprises a contact column and a pressing column, the center of the contact column is recessed inwards to form an arc-shaped concave surface, and the pressing column comprises a plastic connecting rod penetrating out of the machine shell from the top of a column groove, a copper pressing head installed at the bottom of the connecting rod and matched with the arc-shaped concave surface, and a compression spring arranged outside the connecting rod in a sleeving mode. According to the combined type mutual inductor, the binding post is effectively protected, meanwhile, the penetrating phase line can be firmly clamped and fixed when the cover plate is closed, the combined type mutual inductor has the heat conduction and heat dissipation functions, and convenient and stable wiring connection between the bare head of the phase line and the binding post is achieved.

Description

Technical Field

[0001] The utility model relates to the field of electrical measuring equipment, in particular to a combined mutual inductor. Background Art

[0002] A voltage transformer is an electrical measuring device that measures line voltage through induction of primary and secondary winding coils. The primary winding is connected to the cable phase line, and the secondary winding is connected to the meter head after mutual induction with the primary winding. The voltage transformer for measurement has a phase line contact and a meter head contact, which are used to connect the phase line of the cable to be measured and the meter head respectively. Existing voltage transformers generally have problems such as the meter head connection affecting the detection efficiency, and the exposed contacts are prone to failure or internal coil failure. Chinese patent CN217361347U discloses a voltage transformer, which accommodates and encloses the terminal inside the column slot through the design of an inner concave column slot and a sliding cover plate, but when the technical solution is actually implemented to form a product, its structure has the following problems:

[0003] (1) The cover plate that slides up and down cannot effectively clamp and fix the introduced phase line when it goes down;

[0004] (2) It is inconvenient to connect the phase line end to the terminal, and the sliding cover will naturally fall down, hindering the wiring operation;

[0005] (3) The exposed joints at the column slot wiring location are heated by electricity, causing the temperature of the enclosed space where the wiring is located to be too high;

[0006] (4) The fixing method of wrapping the phase line end around the terminal makes the connection unstable and prone to loose connection or falling off. Utility Model Content

[0007] The technical problem to be solved by the utility model is: to overcome the defects of the existing voltage transformer meter head connection affecting the detection efficiency, the exposed contacts causing a high failure rate, and the problems caused by the existing cover plate and terminal structure design in actual product applications, and to provide a combined transformer, which effectively protects the terminal while improving the terminal protection structure through the combined rotating cover plate structure, the two-step containing groove structure, and the combined wiring fixing structure, so that when the cover is closed, the inserted phase line can be firmly clamped and fixed, and it has the function of heat conduction and heat dissipation, and also realizes a convenient and stable wiring connection between the bare head of the phase line and the terminal.

[0008] The combined mutual inductor comprises a casing, a voltage collection column arranged on the casing, a mutual inductance mechanism arranged in the casing, a main control mechanism arranged above the casing, and a base arranged below the casing, wherein the voltage collection column is connected to the input end of the mutual inductance mechanism, and the output end of the mutual inductance mechanism is connected to the input end of the main control mechanism, wherein the casing is in the shape of a regular octagonal cylinder, and three column cavities for accommodating the voltage collection column are arranged on the front of the casing, and a pressure cover for sealing the column cavity is arranged on the outside of the column cavity; the column cavity comprises a cover groove and a column groove formed in sequence by the stepped inner concave of the casing, and the upper edge of the pressure cover is hinged At the upper part of the cover groove, the voltage collection column is arranged in the column groove; the lower part of the pressure cover is provided with a U-shaped pressing wire opening, and the lower edge of the pressure cover is wrapped and fixed with an elastic rubber sealing edge; a heat dissipation aluminum sheet is provided on the pressure cover, and heat dissipation fins are provided on the outer surface of the heat dissipation aluminum sheet; the voltage collection column includes a copper contact column fixed on the bottom surface of the cover groove, a pressure column installed on the casing and extending into the column groove, the center of the contact column is sunken to form an arc-shaped concave surface, and the pressure column includes a plastic connecting rod that passes through the casing from the top of the column groove, a copper pressure head installed at the bottom of the connecting rod and matching the arc-shaped concave surface, and a compression spring sleeved on the outside of the connecting rod.

[0009] Furthermore, an insulating plastic handle is fixed to the top of the connecting rod, and the oblique end surface of the lower end of the plastic handle matches the outer surface of the casing.

[0010] Furthermore, an arc-shaped wire receiving groove extending to the contact column is formed at the bottom of the column groove.

[0011] Furthermore, a handle is provided above the casing.

[0012] Specifically, the mutual inductance mechanism includes a primary winding and a secondary winding; the head end of the primary winding is connected to the voltage collection column, and the tail end of the primary winding is connected and then suspended; the head end of the secondary winding is connected to the input end of the main control mechanism, and the tail end of the secondary winding is connected and then grounded.

[0013] The utility model discloses a combined transformer, which overcomes the defects of the existing voltage transformer head connection affecting the detection efficiency, the exposed contacts causing a high failure rate, and the problems caused by the existing cover plate and terminal structure design in actual product applications. While effectively protecting the terminal, it is improved through the combined rotating cover plate structure, the two-step containing groove structure, and the combined wiring fixing structure of the terminal protection structure, so that when the cover is closed, the inserted phase line can be firmly clamped and fixed, and it has the function of heat conduction and heat dissipation, and also realizes a convenient and stable wiring connection between the bare head of the phase line and the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following is a further description of a combined mutual inductor of the utility model in conjunction with the accompanying drawings:

[0015] Figure 1This is a schematic diagram of the main plane structure of implementation modes 1 and 2;

[0016] Figure 2 is a schematic diagram of a three-dimensional structure viewed from the lower left side of embodiments 1 and 2;

[0017] Figure 3 is a schematic diagram of a three-dimensional structure viewed from the lower right side of embodiments 1 and 2;

[0018] Figure 4 This is a wireframe diagram showing the logical structure connection between the mutual induction mechanism and the main control mechanism of implementation mode 3.

[0019] In the figure:

[0020] 1- housing, 2- voltage collection column, 3- mutual inductance mechanism, 4- main control mechanism, 5- base;

[0021] 11-column cavity, 12-pressure cover, 13-handle; 21-contact column, 22-pressure column; 31-primary winding, 32-secondary winding 32;

[0022] 111-cover groove, 112-column groove, 113-wire receiving groove; 121-wire pressing port, 122-rubber edge sealing, 123-heat dissipation aluminum sheet, 124-heat dissipation fin; 211-arc concave surface, 221-plastic connecting rod, 222-pressing head, 223-compression spring, 224-plastic handle. DETAILED DESCRIPTION

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] The technical solution of the utility model is further described below with specific embodiments, but the protection scope of the utility model is not limited to the following embodiments.

[0026] Implementation method 1: Figures 1 to 4 As shown, the combined mutual inductor includes a housing 1, a voltage collection column 2 arranged on the housing 1, a mutual inductance mechanism 3 arranged in the housing 1, a main control mechanism 4 arranged above the housing 1, and a base 5 arranged below the housing 1, wherein the voltage collection column 2 is connected to the input end of the mutual inductance mechanism 3, and the output end of the mutual inductance mechanism 3 is connected to the input end of the main control mechanism 4, wherein the housing 1 is in the shape of a regular octagonal cylinder, and the front of the housing 1 is provided with three column cavities 11 for accommodating the voltage collection column 2, and a pressure cover 12 for sealing the column cavity is provided on the outside of the column cavity 11; the column cavity 11 includes a cover groove 111 and a column groove 112 formed in sequence by the stepped concave of the housing 1, and the upper edge of the pressure cover 12 is hinged at the upper part of the cover groove 111, and the voltage collection column 2 is connected to the input end of the mutual inductance mechanism 3, and the output end of the mutual inductance mechanism 3 is connected to the input end of the main control mechanism 4. The column 2 is arranged in the column groove 112; a U-shaped pressing wire opening 121 is arranged at the lower part of the pressure cover 12, and an elastic rubber sealing edge 122 is wrapped and fixed at the lower edge of the pressure cover 12; a heat dissipation aluminum sheet 123 is arranged on the pressure cover 12, and a heat dissipation fin 124 is arranged on the outer surface of the heat dissipation aluminum sheet 123; the voltage collection column 2 includes a copper contact column 21 fixed on the bottom surface of the cover groove 111, a pressure column 22 installed on the casing and extending into the column groove 112, the center of the contact column 21 is sunken to form an arc-shaped concave surface 211, and the pressure column 22 includes a plastic connecting rod 221 that passes through the casing from the top of the column groove 112, a copper pressure head 222 installed at the bottom of the connecting rod 221 and matching the arc-shaped concave surface 211, and a compression spring 223 sleeved on the outside of the connecting rod 221.

[0027] Embodiment 2: An insulating plastic handle 224 is fixed on the top of the connecting rod 221 of this combined mutual inductor, and the lower oblique end surface of the plastic handle 224 matches the outer surface of the housing 1. It is used to lift the connecting rod to separate the pressure head from the column slot, and after inserting the bare head of the phase line, release the handle to complete convenient and fast wiring, which is convenient and safe to operate. An arc-shaped wire receiving groove 113 extending to the contact column 21 is formed at the bottom of the column slot 112. It is used to introduce the bare head of the phase line into the contact column, and to support and position the lower edge of the phase line when the box cover is closed to prevent displacement. A handle 13 is provided on the top of the housing 1. It is convenient to carry and transfer.

[0028] Implementation method 3: Figure 4As shown, the mutual inductance mechanism 3 of the combined mutual inductor includes a primary winding 31 and a secondary winding 32; the head end of the primary winding 31 is connected to the voltage collection column 2, and the tail end of the primary winding 31 is connected and suspended; the head end of the secondary winding 32 is connected to the input end of the main control mechanism 4, and the tail end of the secondary winding 32 is connected and grounded. The main control mechanism 4 includes a signal processing unit, a processing chip, a wireless data transmission module, a display screen and a power module. The signal processing unit includes a filter module, a signal amplification module and an A / D conversion module. The filter module of the signal processing unit is connected to the head end of the secondary winding, and the output end of the filter module is connected to the input end of the processing chip through the signal amplification module and the A / D conversion module. The processing chip is connected to the wireless data transmission module and the display screen through serial communication. The wireless data transmission module is integrated with a signal gain antenna. The power module supplies DC3.3V / 5V to the processing chip, the wireless data transmission module and the display screen respectively. In this embodiment, the mutual inductance winding and control mechanism design of the prior art are adopted, which will not be repeated. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0029] When in use: open the pressure cover, the pressure cover will be suspended under the damping effect of the rubber shaft, pull up the lifting handle, guide the phase line of the cable to be tested along the arc-shaped concave surface into the column groove of the contact column, release the lifting handle, flip down and snap the pressure cover, the pressure cover will firmly press the phase line through the elastic rubber sealing edge on the pressure line mouth, and at the same time, the rubber sealing edges extending on both sides of the pressure line mouth of the pressure cover squeeze the bottom of the cover groove and the edge of the side wall, which has a stop effect on the pressure cover to prevent it from flipping up and opening the cover. To open the cover again, use a flat-blade screwdriver to pry it open from the side of the pressure cover without rubber sealing, and complete the wiring and fixation of the three phase lines in turn. The subsequent operation process is as recorded in the prior art: the mutual inductance of the secondary winding and the primary winding voltage form an analog signal, the signal processing unit filters, amplifies, and converts the analog signal to digital, and then sends it to the processing chip, the processing chip outputs one way to the display screen, and the other way is sent to the remote mobile device or background through the wireless data transmission module.

[0030] The combined transformer overcomes the defects of the existing voltage transformer head connection affecting the detection efficiency, the exposed contacts causing a high failure rate, and the problems caused by the existing cover and terminal structure design in actual product applications. While effectively protecting the terminal, it is improved through the combined rotating cover structure, the two-stage groove structure, and the combined wiring fixing structure of the terminal protection structure, so that when the cover is closed, the inserted phase line can be firmly clamped and fixed, and it has the function of heat conduction and heat dissipation, and also realizes a convenient and stable wiring connection between the bare head of the phase line and the terminal.

[0031] The above description shows the main features, basic principles, and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments or embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined mutual inductor, characterized in that: The invention comprises a housing (1), a voltage collection column (2) arranged on the housing (1), a mutual inductance mechanism (3) arranged in the housing (1), a main control mechanism (4) arranged above the housing (1), and a base (5) arranged below the housing (1), wherein the voltage collection column (2) is connected to the input end of the mutual inductance mechanism (3), and the output end of the mutual inductance mechanism (3) is connected to the input end of the main control mechanism (4), wherein the housing (1) is in the shape of a regular octagonal cylinder, and three column cavities (11) for accommodating the voltage collection columns (2) are arranged on the front of the housing (1), and a pressure cover (12) for sealing the column cavities is arranged on the outside of the column cavities (11); The column cavity (11) comprises a cover groove (111) and a column groove (112) which are sequentially formed by stepped indentations of the housing (1); the upper edge of the gland (12) is hinged to the upper portion of the cover groove (111); the voltage collection column (2) is arranged in the column groove (112); a U-shaped wire pressing opening (121) is arranged at the lower portion of the gland (12); an elastic rubber sealing edge (122) is wrapped around and fixedly attached to the lower edge of the gland (12); a heat dissipation aluminum sheet (123) is arranged on the gland (12), and a heat dissipation fin (124) is arranged on the outer surface of the heat dissipation aluminum sheet (123). The voltage collection column (2) comprises a copper contact column (21) fixed on the bottom surface of the cover groove (111), a pressure column (22) installed on the housing and extending into the column groove (112), the center of the contact column (21) is sunken to form an arc-shaped concave surface (211), and the pressure column (22) comprises a plastic connecting rod (221) passing through the housing from the top of the column groove (112), a copper pressure head (222) installed at the bottom of the connecting rod (221) and matching the arc-shaped concave surface (211), and a compression spring (223) sleeved on the outside of the connecting rod (221).

2. The combined mutual inductor according to claim 1, characterized in that: An insulating plastic handle (224) is fixed to the top of the connecting rod (221), and the lower oblique end surface of the plastic handle (224) matches the outer surface of the casing (1).

3. The combined mutual inductor according to claim 2, characterized in that: An arc-shaped wire receiving groove (113) extending to the contact column (21) is formed at the bottom of the column groove (112).

4. The combined mutual inductor according to claim 3 is characterized in that: A handle (13) is provided on the upper side of the casing (1).

5. The combined mutual inductor according to claim 4 is characterized in that: The mutual inductance mechanism (3) comprises a primary winding (31) and a secondary winding (32); the head end of the primary winding (31) is connected to the voltage collection column (2), and the tail end of the primary winding (31) is connected and then suspended; the head end of the secondary winding (32) is connected to the input end of the main control mechanism (4), and the tail end of the secondary winding (32) is connected and then grounded.

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