Automatic phase converter

Abstract

The utility model discloses an automatic phase converter in the technical field of ring main unit testing. The automatic phase converter comprises a rack; the high-voltage connecting part comprises a plurality of high-voltage rods, is mounted on the rack and is communicated with the high-voltage output source; the grounding connection part comprises a plurality of grounding rods, is mounted on the rack and is grounded, and the high-voltage rods and the grounding rods are arranged in a staggered manner; each switching mechanism comprises three voltage-sharing seats, each voltage-sharing seat is correspondingly provided with a connecting rod and a driving mechanism, the three voltage-sharing seats in the same group are correspondingly connected with a three-phase joint of a to-be-tested product, one end of each connecting rod is hinged to the corresponding voltage-sharing seat, the other end of each connecting rod is located between the adjacent high-voltage rod and grounding rod, and the driving mechanism is connected with the corresponding connecting rod. And the other end of the connecting rod is in contact connection with the high-voltage rod or the grounding rod. After wiring is completed, the automatic phase converter can complete inter-phase, phase-to-ground voltage withstanding, fracture voltage withstanding and partial discharge tests of the multi-interval ring main unit, so that frequent manual wiring operation is avoided, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ring main unit testing, and particularly relates to an automatic phase changer. Background Art

[0002] A ring main unit is a set of high-voltage switchgear installed in a metal or non-metal insulating cabinet or made into a assembled sectionalized ring main unit power supply unit. Its core part adopts a load switch and a fuse, and has the advantages of simple structure, small volume, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution substations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and industrial enterprises.

[0003] Live detection of power equipment has been an effective means for preventing insulation defects of electrical equipment in the power system. The common detection items of ring main units include phase-to-phase, phase-to-ground withstand voltage, break withstand voltage, partial discharge test, etc. However, the above-mentioned live detection test process is cumbersome, and the three-phase terminals need to be switched between connecting high voltage and grounding respectively, and the manual conversion of wiring is cumbersome, seriously affecting the test efficiency. Summary of the Utility Model

[0004] This application provides an automatic phase changer, which solves the problem of frequent manual conversion of wiring during live detection of ring main units in the prior art, realizes the effect of automatic switching of the three-phase terminals between grounding and connecting high voltage, and improves the test efficiency.

[0005] An embodiment of this application provides an automatic phase changer, including:

[0006] A frame;

[0007] A high-voltage connection part, installed on the frame and communicated with a high-voltage output source, the high-voltage connection part includes a plurality of high-voltage rods;

[0008] A grounding connection part, installed on the frame and grounded, the grounding connection part includes a plurality of grounding rods, and the high-voltage rods and the grounding rods are arranged alternately;

[0009] A plurality of groups of switching mechanisms, each group of switching mechanisms includes three voltage equalizing seats, each voltage equalizing seat is correspondingly provided with a connecting rod and a driving mechanism, the three voltage equalizing seats in the same group correspondingly connect the three-phase joints of the product to be tested, one end of the connecting rod is hinged to the corresponding voltage equalizing seat, and the other end is located between the adjacent high-voltage rod and the grounding rod, and the driving mechanism is connected to the corresponding connecting rod to drive the connecting rod to rotate along the hinge axis, so that the other end of the connecting rod abuts against and connects the high-voltage rod or the grounding rod.

[0010] Based on the above embodiment, this application can be further improved as follows:

[0011] In one embodiment of the present application, the three voltage equalizing seats in the same group of the switching mechanism are located at different horizontal heights, and there is a height difference between adjacent voltage equalizing seats. The height difference is used to increase the distance between adjacent voltage equalizing seats, avoid partial discharge, and save space.

[0012] In one embodiment of the present application, the high-voltage connection part includes a first high-voltage rod and a second high-voltage rod arranged in parallel. The first high-voltage rod and the second high-voltage rod are installed on the frame through insulators and are both connected to the high-voltage output source; the ground connection part includes a first ground rod and a second ground rod arranged in parallel. The first ground rod and the second ground rod are installed on the frame and grounded, and the first high-voltage rod, the first ground rod, the second high-voltage rod, and the second ground rod are arranged in sequence from top to bottom. Three adjacent areas are formed between the first high-voltage rod, the first ground rod, the second high-voltage rod, and the second ground rod. The three connecting rods in the same group of the switching mechanism can be respectively located in one area, saving space.

[0013] In one embodiment of the present application, the first high-voltage rod, the first ground rod, the second high-voltage rod, and the second ground rod are provided with a plurality of voltage equalizing flanges for the connecting rods to abut and connect. Prevent partial discharge during contact.

[0014] In one embodiment of the present application, the driving mechanism includes a telescopic cylinder and a driving rod. The fixed end of the telescopic cylinder is installed on the frame, one end of the driving rod is installed on the movable end of the telescopic cylinder, and the other end is connected to the middle of the connecting rod. A chute is arranged in the middle of the connecting rod, and the end of the driving rod is clamped in the chute. The automatic control of the rotation of the connecting rod is realized by controlling the telescopic cylinder.

[0015] In one embodiment of the present application, each voltage equalizing seat is respectively installed on the frame through an insulator, and a voltage equalizing ring is arranged around the connection between the bottom of the insulator and the frame.

[0016] In one embodiment of the present application, the automatic phase changer further includes an external grounding component. The external grounding component includes a grounding seat, a grounding connecting rod, and the driving mechanism. The grounding seat is installed on the frame through an insulator and is connected to the outer shell of the test article to be tested. A fixed contact extends from the grounding seat. One end of the grounding connecting rod is hinged to the grounding rod, and the other end is used to abut against the fixed contact. The driving mechanism is connected to the corresponding grounding connecting rod to drive the grounding connecting rod to rotate along the hinge axis, so that the other end of the grounding connecting rod abuts and connects the fixed contact or is suspended. Realize the automatic control of grounding or suspension of the outer shell of the test article to be tested.

[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0018] 1. In each set of switching mechanisms of this automatic phase changer, the three voltage equalizing seats are respectively connected to the three phases A, B, and C, and can respectively control connection to high voltage or ground; there is also an output connected to the housing, which can control grounding or floating. After being paired with DC control power supplies of 24V, 48V, 110V, and 220V, it can realize the closing and opening operations of the circuit breaker in the ring main unit, and cooperate with the phase changer to form a corresponding test circuit; combined with digital control, it can realize the function of automatic high-voltage grounding and the automatic test processes of partial discharge and withstand voltage.

[0019] 2. After the wiring of this automatic phase changer is completed at one time, it can complete the inter-phase, phase-to-ground withstand voltage, contact withstand voltage, and partial discharge tests of multiple-section ring main units, avoiding frequent manual wiring operations and improving work efficiency. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw to actual scale.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an automatic phase changer in this embodiment;

[0022] Figure 2 It is a front structural schematic diagram of an automatic phase changer in this embodiment;

[0023] Figure 3 It is a test structural schematic diagram of an automatic phase changer in this embodiment.

[0024] Among them, 1. Frame, 21. First high-voltage rod, 22. Second high-voltage rod, 31. First grounding rod, 32. Second grounding rod, 41. Voltage equalizing seat, 42. Connecting rod, 43. Driving mechanism, 431. Telescopic cylinder, 432. Driving rod, 51. Grounding seat, 52. Grounding connecting rod, 6. Insulator, 7. Voltage equalizing ring, 8. Voltage equalizing flange. Specific Embodiments

[0025] The following further clarifies the present invention in combination with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent forms of modification of the present invention by those skilled in the art all fall within the scope defined by the appended claims of this application.

[0026] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "vertical" and "outer peripheral surface" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", and "third" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In addition, terms such as "vertical" do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In the description of the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present utility model and the features of different embodiments or examples.

[0031] By providing an automatic phase changer in the embodiments of the present application, the problem of manual frequent conversion of wiring during live detection of ring main units in the prior art is solved, the effect of automatically switching the three-phase terminals to be grounded or connected to high voltage is achieved, and the test efficiency is improved.

[0032] The overall idea of the technical solution in the embodiments of the present application to solve the above problems is as follows:

[0033] Embodiment:

[0034] As Figures 1-3 shown, an automatic phase changer includes: a frame 1, a high-voltage connection part, a ground connection part, a switching mechanism, and an external ground component.

[0035] The high-voltage connection part includes a first high-voltage rod 21 and a second high-voltage rod 22 which are arranged horizontally in parallel. The first high-voltage rod 21 and the second high-voltage rod 22 are installed on the frame 1 through insulators 5 and are both connected to the high-voltage output source. The grounding connection part includes a first grounding rod 31 and a second grounding rod 32 which are arranged horizontally in parallel. The first grounding rod 31 and the second grounding rod 32 are installed on the frame 1 and grounded. The high-voltage connection part and the grounding connection part are arranged alternately, that is, from top to bottom are the first high-voltage rod 21, the first grounding rod 31, the second high-voltage rod 22, and the second grounding rod 32.

[0036] There are several groups of switching mechanisms, such as Figure 1 As shown in the figure, there are four groups. A single group of switching mechanisms includes three voltage equalizing seats 41 at different horizontal heights for connecting the three-phase joints of the test article to be tested. There is a height difference between adjacent voltage equalizing seats 41 to avoid partial discharge. Each voltage equalizing seat 41 is correspondingly provided with a connecting rod 42 and a driving mechanism 43. Each voltage equalizing seat 41 is installed on the frame 1 through an insulator 5. The three-phase joints of the test article to be tested are respectively connected to the corresponding voltage equalizing seats 41 through cables. One end of the connecting rod 42 is hinged to the corresponding voltage equalizing seat 41 through a hinge, and the other end is located between the adjacent high-voltage rod and the grounding rod. The driving mechanism 43 includes a telescopic cylinder 431 and a driving rod 432. The fixed end of the telescopic cylinder 431 is installed on the frame 1. One end of the driving rod 432 is installed on the movable end of the telescopic cylinder 431, and the other end is connected to the middle of the connecting rod 42. A chute is arranged in the middle of the connecting rod 42, and the end of the driving rod 432 is clamped in the chute to realize the rotation of the connecting rod 42. The driving mechanism 43 drives the connecting rod 42 to rotate along the hinge axis, so that the other end of the connecting rod 42 switches to abut and connect with the high-voltage rod or the grounding rod. Among them, the driving rod 432 is an insulating rod.

[0037] The automatic phase changer is also provided with an external grounding assembly, including a grounding seat 51, a grounding connecting rod 52 and a driving mechanism 43. The grounding seat 51 is installed on the frame 1 through an insulator 5 and is connected to the shell of the test article to be tested. The grounding seat 51 extends with a fixed contact. One end of the grounding connecting rod 52 is hinged to the second grounding rod 32, and the other end is used to abut the fixed contact. The telescopic cylinder 431 of the driving mechanism 43 is installed on the frame 1. One end of the driving rod 432 of the driving mechanism 43 is installed on the movable end of the telescopic cylinder 431, and the other end is connected to the middle of the grounding connecting rod 52. A chute is arranged in the middle of the grounding connecting rod 52, and the end of the driving rod 432 is clamped in the chute to realize the rotation of the grounding connecting rod 52. The driving mechanism 43 drives the grounding connecting rod 52 to rotate along the hinge axis, so that the other end of the grounding connecting rod 52 abuts the fixed contact or is suspended, so that the shell of the test article to be tested is grounded or suspended.

[0038] Further, a voltage equalizing ring 7 is arranged around the connection between the bottom of the insulator 5 connected to each voltage equalizing seat 41 and the grounding seat 51 and the frame 1.

[0039] Furthermore, a plurality of grading flanges 8 are provided on the first high-voltage rod 21, the first grounding rod 31, the second high-voltage rod 22, and the second grounding rod 32, and the grading flanges 8 are used for the respective connecting rods 42 to abut and connect, preventing partial discharge during contact.

[0040] Furthermore, universal wheels are provided at the bottom of the frame 1 for convenient movement.

[0041] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0042] In each switching mechanism of the automatic phase changer, the three grading seats are respectively connected to the A, B, and C phases, and can respectively control connection to high voltage or grounding; there is also an output connected to the housing, which can control grounding or suspension. After being paired with 24V, 48V, 110V, and 220V DC control power supplies, the closing and opening operations of the circuit breaker in the ring main unit can be realized, and a corresponding test circuit can be formed in cooperation with the phase changer; combined with digital control, the high-voltage automatic grounding function, and the automatic test processes for partial discharge and withstand voltage can be realized.

[0043] After the wiring of the automatic phase changer is completed at one time, the interphase, phase-to-ground withstand voltage, contact withstand voltage, and partial discharge tests of the multi-section ring main unit can be completed, avoiding frequent manual wiring operations and improving work efficiency.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic phase changer, characterized in that, Comprising: Frame; High-voltage connection part, installed on the frame and communicated with a high-voltage output source, the high-voltage connection part includes a plurality of high-voltage rods; Ground connection part, installed on the frame and grounded, the ground connection part includes a plurality of ground rods, and the high-voltage rods and the ground rods are arranged alternately; A plurality of groups of switching mechanisms, each group of the switching mechanisms includes three voltage equalizing seats, each of the voltage equalizing seats is correspondingly provided with a connecting rod and a driving mechanism, the three voltage equalizing seats in the same group are correspondingly connected to the three-phase joints of the product to be tested, one end of the connecting rod is hinged to the corresponding voltage equalizing seat, and the other end is located between the adjacent high-voltage rod and the ground rod, and the driving mechanism is connected to the corresponding connecting rod to drive the connecting rod to rotate along the hinge axis, so that the other end of the connecting rod abuts against and connects the high-voltage rod or the ground rod.

2. The automatic phase converter according to claim 1, wherein: The three voltage equalizing seats in the same group of switching mechanisms are at different horizontal heights, and there is a height difference between adjacent voltage equalizing seats.

3. The automatic phase converter according to claim 2, characterized in that: The high-voltage connection part includes a first high-voltage rod and a second high-voltage rod arranged in parallel, the first high-voltage rod and the second high-voltage rod are installed on the frame through insulators and are both communicated with the high-voltage output source; the ground connection part includes a first ground rod and a second ground rod arranged in parallel, the first ground rod and the second ground rod are installed on the frame and grounded, and the first high-voltage rod, the first ground rod, the second high-voltage rod, and the second ground rod are arranged in sequence from top to bottom.

4. The automatic phase converter according to claim 3, characterized in that: The first high-voltage rod, the first ground rod, the second high-voltage rod, and the second ground rod are provided with a plurality of voltage equalizing flanges for the connecting rods to abut against and connect.

5. The automatic phase converter according to claim 1, characterized in that: The driving mechanism includes a telescopic cylinder and a driving rod, the fixed end of the telescopic cylinder is installed on the frame, one end of the driving rod is installed on the movable end of the telescopic cylinder, and the other end is connected to the middle of the connecting rod. A chute is arranged in the middle of the connecting rod, and the end of the driving rod is clamped in the chute.

6. The automatic phase converter according to claim 1, characterized in that: Each of the voltage equalizing seats is installed on the frame through an insulator, and a voltage equalizing ring is arranged around the connection part between the bottom of the insulator and the frame.

7. The automatic phase converter according to claim 1, characterized in that: The automatic phase changer further includes an external grounding component, the external grounding component includes a grounding seat, a grounding connecting rod and the driving mechanism, the grounding seat is installed on the frame through an insulator and is connected to the shell of the product to be tested, a fixed contact extends from the grounding seat, one end of the grounding connecting rod is hinged to the ground rod, and the other end is used to abut against the fixed contact, and the driving mechanism is connected to the corresponding grounding connecting rod to drive the grounding connecting rod to rotate along the hinge axis, so that the other end of the grounding connecting rod abuts against and connects the fixed contact or is suspended.

8. The automatic phase converter according to claim 1, characterized in that: Universal wheels are arranged at the bottom of the frame.

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