Capacitive voltage transformer

Abstract

The utility model belongs to the technical field of transformers, and particularly relates to a capacitive voltage transformer which comprises an electromagnetic unit, a capacitive voltage divider and a fixing plate are arranged on the electromagnetic unit, the capacitive voltage divider comprises an expander, a porcelain bushing and a wiring terminal, a lower fixing ring is arranged on the porcelain bushing, an upper fixing cover and a driving sleeve are arranged on the lower fixing ring, and the driving sleeve is arranged on the upper fixing cover. A ratchet wheel groove and a through groove are formed in the upper fixing cover, a ratchet wheel protrusion and a handle are fixedly arranged on the driving sleeve, a mounting groove is formed in the driving sleeve, a protective cover is arranged at the other end of the handle, and a sliding groove is formed in the protective cover. According to the utility model, the driving sleeve is arranged at the top of the capacitive voltage divider, and the handle is used for rotating the driving sleeve to enable the mounting groove to correspond to the through groove, so that the wiring terminal can be connected with an external cable, the wiring terminal is always positioned in the upper fixed cover, and when the driving sleeve rotates, the protective cover at the other end of the handle and the fixed plate just form a ring shape; therefore, the porcelain sleeve is surrounded.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a capacitive voltage mutual inductor. Background Art

[0002] Capacitor voltage transformer is an important power system measurement equipment. It is divided by series capacitors, and then reduced and isolated by electromagnetic transformers. It is mainly used for metering, relay protection and other purposes. At the same time, it can also couple the carrier frequency to the transmission line to achieve long-distance communication, remote measurement, selective line high-frequency protection, remote control, teletypewriting and other functions.

[0003] Existing capacitive voltage transformers usually use porcelain sleeves to provide insulation protection for the internal windings, and the terminal blocks are located at the top of the capacitive voltage divider. The installation environment of the voltage transformer is located at a higher position. Without other protection measures, the terminal blocks and porcelain sleeves will always be affected by wind and rain. At the same time, objects in the external environment will often hit the porcelain sleeves, causing the terminal blocks and porcelain sleeves to wear faster, thereby reducing the service life of the device.

[0004] In order to solve the above problems, a capacitive voltage transformer is proposed in the present application. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a capacitive voltage transformer, including an electromagnetic unit, on which a capacitive voltage divider and a fixed plate are fixedly provided, the capacitive voltage divider includes an expander, a porcelain sleeve and a terminal, a lower fixing ring is provided on the top of the porcelain sleeve, a bolt is spirally provided on the lower fixing ring, an upper fixing cover is spirally provided on the bolt, a driving sleeve is rotatably provided between the lower fixing ring and the upper fixing cover, a protective plate is fixedly provided on the upper fixing cover, a ratchet groove and a through groove are provided on the upper fixing cover, a ratchet protrusion and a handle are fixedly provided on the driving sleeve, a mounting groove is provided on the driving sleeve, a protective cover is fixedly provided on the other end of the handle, and a sliding groove is provided on the protective cover.

[0006] Preferably, the electromagnetic unit includes a grounding seat and an outlet box, the capacitive voltage divider and the fixing plate are fixedly connected to the upper surface of the grounding seat, the protective cover is slidably connected to the upper surface of the grounding seat, and the fixing plate is slidably connected in the slide groove.

[0007] Preferably, the arc length of the fixed plate is equal to one third of the arc length of the protective cover, the capacitive voltage divider is located between the protective cover and the fixed plate, and the diameter of the protective cover is greater than the diameter of the porcelain sleeve.

[0008] Preferably, the expander and the wiring terminal penetrate the lower fixing ring and the upper fixing cover, and the wiring terminal is located in the inner cavity of the upper fixing cover.

[0009] Preferably, the lower fixing ring and the upper fixing cover are connected by bolts, the bottom of the driving sleeve is annular in shape, and the bottom of the driving sleeve is rotatably connected between the lower fixing ring and the upper fixing cover.

[0010] Preferably, a ratchet protrusion is fixedly provided on the inner side surface of the bottom of the driving sleeve, and a ratchet groove is opened on the inner wall of the upper fixed cover, and the ratchet protrusion is engaged in the ratchet groove.

[0011] Preferably, the protective plate is fixedly connected to the inner wall of the upper fixed cover, the ratchet groove and the ratchet protrusion are located below the protective plate, and the length and width of the through groove and the mounting groove are equal.

[0012] The above technical solution of the utility model has the following beneficial technical effects:

[0013] The utility model provides a rotating driving sleeve between the upper and lower fixing devices at the top of the capacitor voltage divider, and uses a handle to rotate the driving sleeve to make the installation groove and the through groove correspond to each other, so that the wiring terminal can be connected to the external cable, and the connection between the wiring terminal and the cable is always located inside the upper fixing cover and the driving sleeve, thereby preventing the wiring terminal from being affected by wind and rain. When the driving sleeve rotates, the protective cover at the other end of the handle will start to rotate around the porcelain sleeve. When the installation groove and the through groove correspond to each other, the protective cover just rotates 180 degrees and forms a ring with the fixing plate whose arc length is one third of the protective cover, thereby surrounding the porcelain sleeve. Due to the action of the ratchet protrusion and the ratchet groove, the driving sleeve and the protective cover can only rotate clockwise and are not easy to shake, thereby preventing the protective cover and the fixing plate from separating, and finally protecting both the wiring terminal and the porcelain sleeve, without affecting the installation and use of the device, avoiding accelerated loss due to the external environment, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 It is a schematic diagram of the partial decomposition structure of the utility model.

[0018] Reference numerals:

[0019] 1. Electromagnetic unit; 101. Grounding socket; 102. Terminal box; 2. Capacitor divider; 201. Expander; 202. Porcelain sleeve; 203. Terminal block; 3. Lower fixing ring; 301. Bolt; 4. Upper fixing cover; 401. Ratchet groove; 402. Protective plate; 403. Through groove; 5. Driving sleeve; 501. Ratchet protrusion; 502. Handle; 503. Installation groove; 6. Protective cover; 601. Slide groove; 7. Fixing plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0021] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0022] A capacitive voltage transformer provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0023] Embodiment 1:

[0024] Combination Figure 1-4As shown, a capacitive voltage transformer provided by the utility model includes an electromagnetic unit 1, on which a capacitive voltage divider 2 and a fixing plate 7 are fixedly provided, the capacitive voltage divider 2 includes an expander 201, a porcelain sleeve 202 and a terminal 203, a lower fixing ring 3 is provided on the top of the porcelain sleeve 202, a bolt 301 is spirally provided on the lower fixing ring 3, an upper fixing cover 4 is spirally provided on the bolt 301, a driving sleeve 5 is rotatably provided between the lower fixing ring 3 and the upper fixing cover 4, and the upper fixing cover 4 is provided with a drive sleeve 5. A protective plate 402 is fixedly provided, a ratchet groove 401 and a through groove 403 are provided on the upper fixed cover 4, a ratchet protrusion 501 and a handle 502 are fixedly provided on the drive sleeve 5, a mounting groove 503 is provided on the drive sleeve 5, a protective cover 6 is fixedly provided at the other end of the handle 502, a sliding groove 601 is provided on the protective cover 6, the electromagnetic unit 1 includes a grounding seat 101 and an outlet box 102, the capacitive voltage divider 2 and the fixed plate 7 are fixedly connected to the upper surface of the grounding seat 101, and the protective cover 6 slides The fixing plate 7 is connected to the upper surface of the grounding seat 101, and the fixing plate 7 is slidably connected in the slide groove 601. The arc length of the fixing plate 7 is equal to one-third of the arc length of the protective cover 6. The capacitive voltage divider 2 is located between the protective cover 6 and the fixing plate 7. The diameter of the protective cover 6 is greater than the diameter of the porcelain sleeve 202. The expander 201 and the terminal 203 pass through the lower fixing ring 3 and the upper fixing cover 4. The terminal 203 is located in the inner cavity of the upper fixing cover 4. The lower fixing ring 3 and the upper fixing cover 4 are connected by bolts 301. The bottom shape of the driving sleeve 5 is annular, and the bottom of the driving sleeve 5 is rotatably connected between the lower fixing ring 3 and the upper fixing cover 4. A ratchet protrusion 501 is fixedly provided on the inner side surface of the bottom of the driving sleeve 5. A ratchet groove 401 is opened on the inner wall of the upper fixing cover 4. The ratchet protrusion 501 is engaged in the ratchet groove 401. The protective plate 402 is fixedly connected to the inner wall of the upper fixing cover 4. The ratchet groove 401 and the ratchet protrusion 501 are located below the protective plate 402. The length and width of the through groove 403 and the mounting groove 503 are equal.

[0025] Specifically, the electromagnetic unit 1 includes a grounding seat 101 and an outlet box 102, the capacitor voltage divider 2 is fixedly connected to the upper surface of the grounding seat 101, the capacitor voltage divider 2 includes an expander 201, a porcelain sleeve 202 and a terminal 203, a lower fixing ring 3 is fixedly provided on the top of the porcelain sleeve 202, an upper fixing cover 4 is fixedly provided on the upper surface of the lower fixing ring 3, the lower fixing ring 3 and the upper fixing cover 4 are spirally connected together by bolts 301, the electromagnetic unit 1, the capacitor voltage divider 2, the lower fixing ring 3 and the upper fixing cover 4 constitute the main structure of the capacitive voltage transformer, which provides a guarantee for the basic functions of the device, an annular gap is provided between the lower fixing ring 3 and the upper fixing cover 4, and the bottom of the driving sleeve 5 The annular protrusion on the upper part is rotatably connected between the lower fixing ring 3 and the upper fixing cover 4, so that the driving sleeve 5 can rotate on the side of the upper fixing cover 4, and a through groove 403 is provided on the side of the upper fixing cover 4. The side of the driving sleeve 5 is provided with a mounting groove 503, so that when it is necessary to connect the cable to the wiring terminal 203, the driving sleeve 5 can be rotated to make the mounting groove 503 correspond to the through groove 403, so that the cable can enter the upper fixing cover 4 and connect with the wiring terminal 203, and the connection position of the wiring terminal 203 and the cable is always located in the encirclement of the upper fixing cover 4 and the driving sleeve 5, so as to reduce the influence of the external environment on the wiring terminal 203, and a ratchet groove 403 is provided on the inner wall of the upper fixing cover 4. 1. A ratchet protrusion 501 is fixedly provided on the inner side of the bottom of the driving sleeve 5, and the ratchet protrusion 501 is engaged in the ratchet groove 401. A protective plate 402 is fixedly provided on the inner wall of the upper fixed cover 4. The ratchet protrusion 501 and the ratchet groove 401 are located below the protective plate 402, so as to provide protection for the ratchet groove 401 and the ratchet protrusion 501, and prevent impurities from entering the connection between the ratchet groove 401 and the ratchet protrusion 501. A handle 502 is fixedly welded on the side of the driving sleeve 5, and a protective cover 6 is fixedly welded on the other end of the handle 502. A slide groove 601 is opened on the protective cover 6, and a fixed plate 7 on the upper surface of the grounding seat 101 is slidably connected in the slide groove 601, and the arc length of the fixed plate 7 is The arc length is equal to one third of the protective cover 6, so that the protective cover 6 will form a ring with the fixed plate 7 after rotating to a certain angle, thereby enclosing the capacitive voltage divider 2, and then providing protection for the porcelain sleeve 202, preventing objects in the external environment from impacting and damaging the porcelain sleeve 202. At the same time, due to the ratchet groove 401 and the ratchet protrusion 501, the drive sleeve 5 can only rotate clockwise to enhance the stability of the drive sleeve 5 and the protective cover 6, and prevent the protective cover 6 from moving without human interference. Since the diameter of the protective cover 6 is larger than the diameter of the porcelain sleeve 202, the protective cover 6 can follow the drive sleeve 5 and be sleeved around the porcelain sleeve 202 from top to bottom, thereby not affecting the installation of the device.

[0026] The working principle and use process of the utility model are as follows: first, the expander 201 is connected to the grounding seat 101, the expander 201 is installed, the porcelain sleeve 202 is put on the outside of the expander 201, and the porcelain sleeve 202 is fixed on the grounding seat 101 with bolts 301 to complete the fixed installation of the capacitor voltage divider 2 as a whole, and then the upper and lower fixing rings 3 are fixedly connected to the porcelain sleeve 202, so that the expander 201 is located in the middle of the lower fixing ring 3, the driving sleeve 5 is put on the upper surface of the lower fixing ring 3, and then the upper fixing cover 4 is placed in the driving sleeve 5, so that the ratchet groove 401 and the ratchet protrusion 501 on the upper fixing cover 4 are meshed with each other, at this time, a part of the lower surface of the upper fixing cover 4 is in contact with the upper surface of the lower fixing ring 3, and then the lower fixing ring 3 and the upper fixing cover are fixed with bolts 301. 4 is fixed together, so that the driving sleeve 5 is rotated and connected between the lower fixing ring 3 and the upper fixing cover 4 and will not fall off. At this time, the protective cover 6 at the other end of the handle 502 just sleeves the fixing plate 7 in the sliding groove 601, and then the handle 502 can be rotated to control the driving sleeve 5 and the protective cover 6 to rotate 180 degrees, so that the installation groove 503 and the through groove 403 correspond to each other. At this time, the protective cover 6 and the fixing plate 7 will also form a ring to surround the capacitor voltage divider 2 to provide protection for the porcelain sleeve 202, and the external cable can enter the upper fixing cover 4 and connect with the wiring terminal 203. The upper fixing cover 4 and the driving sleeve 5 will provide protection for the wiring terminal 203, thereby preventing the wiring terminal 203 and the porcelain sleeve 202 from being affected by the external environment and extending the service life of the device.

[0027] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A capacitive voltage transformer, comprising an electromagnetic unit (1), characterized in that: The electromagnetic unit (1) is fixedly provided with a capacitive voltage divider (2) and a fixing plate (7); the capacitive voltage divider (2) comprises an expander (201), a porcelain sleeve (202) and a wiring terminal (203); a lower fixing ring (3) is provided on the top of the porcelain sleeve (202); a bolt (301) is spirally provided on the lower fixing ring (3); an upper fixing cover (4) is spirally provided on the bolt (301); the lower fixing ring (3) and the upper fixing cover (4) are rotatably connected to each other. A driving sleeve (5) is provided, a protective plate (402) is fixedly provided on the upper fixed cover (4), a ratchet groove (401) and a through groove (403) are provided on the upper fixed cover (4), a ratchet protrusion (501) and a handle (502) are fixedly provided on the driving sleeve (5), a mounting groove (503) is provided on the driving sleeve (5), a protective cover (6) is fixedly provided at the other end of the handle (502), and a sliding groove (601) is provided on the protective cover (6).

2. A capacitive voltage transformer according to claim 1, characterized in that: The electromagnetic unit (1) comprises a grounding seat (101) and an outlet box (102); the capacitive voltage divider (2) and the fixing plate (7) are fixedly connected to the upper surface of the grounding seat (101); the protective cover (6) is slidably connected to the upper surface of the grounding seat (101); and the fixing plate (7) is slidably connected in a slide groove (601).

3. A capacitive voltage transformer according to claim 1, characterized in that: The arc length of the fixed plate (7) is equal to one third of the arc length of the protective cover (6), the capacitive voltage divider (2) is located between the protective cover (6) and the fixed plate (7), and the diameter of the protective cover (6) is greater than the diameter of the porcelain sleeve (202).

4. A capacitive voltage transformer according to claim 1, characterized in that: The expander (201) and the connecting terminal (203) penetrate the lower fixing ring (3) and the upper fixing cover (4), and the connecting terminal (203) is located in the inner cavity of the upper fixing cover (4).

5. A capacitive voltage transformer according to claim 1, characterized in that: The lower fixing ring (3) and the upper fixing cover (4) are connected via bolts (301); the bottom of the driving sleeve (5) is annular in shape; the bottom of the driving sleeve (5) is rotatably connected between the lower fixing ring (3) and the upper fixing cover (4).

6. A capacitive voltage transformer according to claim 1, characterized in that: A ratchet protrusion (501) is fixedly provided on the inner side surface of the bottom of the driving sleeve (5), a ratchet groove (401) is provided on the inner wall of the upper fixed cover (4), and the ratchet protrusion (501) is engaged in the ratchet groove (401).

7. A capacitive voltage transformer according to claim 1, characterized in that: The protective plate (402) is fixedly connected to the inner wall of the upper fixed cover (4), the ratchet groove (401) and the ratchet protrusion (501) are located below the protective plate (402), and the through groove (403) and the mounting groove (503) are equal in length and width.

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