Wiring device special for insulation resistance measurement
By designing a dedicated wiring device for insulation resistance measurement, the problem of frequent wiring changes in the insulation resistance measurement of primary equipment in hydropower plants was solved, and a fast and efficient wiring process was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-03-20
AI Technical Summary
When measuring the insulation resistance of primary equipment in a hydropower plant, it is necessary to frequently change the wiring terminals, resulting in low work efficiency.
A dedicated wiring device for insulation resistance measurement was designed, comprising terminals for phase A, phase B, phase C, L, and E. Combined with first and second line-changing components and a control device, it enables rapid replacement of line connections.
By using pre-connected terminals and wire replacement assemblies, repeated disconnection and reconnection steps are reduced, improving work efficiency.
Smart Images
Figure CN224019900U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of maintenance tool, especially relate to a special wiring device for insulation resistance measurement. BACKGROUND
[0002] In the hydropower plant, all primary equipment, such as generator, main transformer, high voltage outgoing line arrester, the preventive test of the first test item of insulation resistance measurement, the test line provided in the megohmmeter sold on the market has and only has 3, that is, the L end, the E end and the G end. When measuring the insulation resistance of the primary equipment, the L end and the E end measuring line need to be frequently replaced.
[0003] Specifically, when the A phase of the primary equipment is connected with the L end of the megohmmeter, and the B phase and the C phase are connected with the E end, the insulation resistance value of the A phase of the primary equipment can be measured at this time; when the B phase of the primary equipment is connected with the L end of the megohmmeter, and the A phase and the C phase are connected with the E end, the insulation resistance value of the B phase of the primary equipment can be measured at this time; when the C phase of the primary equipment is connected with the L end of the megohmmeter, and the A phase and the B phase are connected with the E end, the insulation resistance value of the C phase of the primary equipment can be measured at this time; when the A phase, the B phase and the C phase of the primary equipment are connected with the E end, the A, B and C three phases are discharged at this time. When the above operation is carried out, the wire needs to be repeatedly disconnected and connected, and the firmness and stability of the wire need to be ensured when the wire is connected, which leads to low operation efficiency. SUMMARY
[0004] The utility model discloses a special wiring device for insulation resistance measurement, which solves the problem of low operation efficiency caused by repeated disconnection and connection of the primary equipment during insulation resistance measurement.
[0005] To achieve the above object, the utility model provides a special wiring device for insulation resistance measurement, which comprises a shell made of insulating material, a phase connection terminal, a B phase connection terminal and a C phase connection terminal are installed on one side of the shell, an L end connection terminal and an E end connection terminal are installed on the other side of the shell, a first conductive row and a second conductive row are fixedly installed at intervals in the bottom of the shell, a first wire changing assembly and a second wire changing assembly are respectively installed above the first conductive row and the second conductive row in the shell, and the first wire changing assembly and the second wire changing assembly both comprise a first elastic conductive plate, a second elastic conductive plate and a third elastic conductive plate.
[0006] The first conductive row is electrically connected with the L end connection terminal, and the second conductive row is electrically connected with the E end connection terminal.
[0007] The first elastic conductive plate is electrically connected with the A-phase connecting terminal, the second elastic conductive plate is electrically connected with the B-phase connecting terminal, and the third elastic conductive plate is electrically connected with the C-phase connecting terminal.
[0008] The control device is used for controlling the contact and conduction of the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate with the first conductive row and the second conductive row.
[0009] The A-phase connecting terminal, the B-phase connecting terminal, the C-phase connecting terminal, the L-terminal connecting terminal and the E-terminal connecting terminal each comprise a conductive seat, a wire pressing hole is arranged in the middle of the conductive seat, the conductive seat is embedded in the shell, a wire pressing screw is screwed with the conductive seat after passing through the shell, and the wire is pressed when the wire pressing screw extends into the wire pressing hole.
[0010] The lower side of the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate is provided with a conductive contact point.
[0011] The shell is provided with a protruding seat on one side of the first conductive row and the second conductive row, and the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate are fixed on the protruding seat.
[0012] The protruding seat is provided with a plurality of limiting grooves, and the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate are respectively fixed and installed in the limiting grooves.
[0013] The control device is six locking screws screwed on the shell, and the six locking screws correspond to the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate.
[0014] The upper side of the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate is fixedly provided with an elastic insulating pad at a position corresponding to the locking screw.
[0015] The shell comprises a groove body and a cover plate, the cover plate is installed on the groove body, and the control device is installed on the cover plate.
[0016] Compared with the prior art, the utility model has the following technical effects:
[0017] 1, the utility model for, once equipment's A phase, B phase and C phase are connected with A phase connecting terminal, B phase connecting terminal and C phase connecting terminal respectively, megohm table's " L " end and " E " end can be connected with L terminal connecting terminal, E terminal connecting terminal respectively in advance, so it needs through control device control first elastic conductive plate, second elastic conductive plate and third elastic conductive plate on first wire changing assembly and second wire changing assembly respectively with first conductive row and second conductive row contact, can realize wire changing, the whole process does not need repeatedly to take off wire and connect, improve operation efficiency.
[0018] 2、the utility model discloses the control device is the six locking screws of screwing on the shell, and six locking screws are corresponding with first elastic conductive plate, second elastic conductive plate and third elastic conductive plate respectively. By screwing different locking screws, so that the corresponding first elastic conductive plate, second elastic conductive plate and third elastic conductive plate contact first conductive row or second conductive row, simple structure. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiment of the present application or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows.
[0020] Figure 1 It is the front view structural schematic diagram of the utility model.
[0021] Figure 2 It is the shell internal structure schematic diagram of the utility model.
[0022] Figure 3 It is Figure 2 the section structure schematic diagram of J-J in middle.
[0023] Figure 4 It is Figure 2 the section structure schematic diagram of K-K in middle.
[0024] Figure 5 It is Figure 2 the section structure schematic diagram of M-M in middle.
[0025] Figure 6 It is the wiring schematic diagram when measuring the insulation resistance value of primary equipment A phase.
[0026] Figure 7 It is the wiring schematic diagram when measuring the insulation resistance value of primary equipment B phase.
[0027] Figure 8 It is the wiring schematic diagram when measuring the insulation resistance value of primary equipment C phase.
[0028] Figure 9 It is the wiring schematic diagram when discharging to primary equipment A, B, C three phases.
[0029] REFERENCE SIGNS:
[0030] Shell 10, groove body 101, cover plate 102, A phase terminal 11, B phase terminal 12, C phase terminal 13, L end terminal 14, E end terminal 15, conductive seat 16, wire pressing hole 17, wire pressing screw 18;
[0031] The first line changing assembly 20, the second line changing assembly 30, the first elastic conductive plate 21, the second elastic conductive plate 22, the third elastic conductive plate 23, the locking screw 24, the conductive contact 25, and the elastic insulating pad 26;
[0032] The first conductive row 40 and the second conductive row 50;
[0033] The protruding seat 60 and the limiting groove 61. DETAILED DESCRIPTION
[0034] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, the embodiments described below are exemplary, and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.
[0035] Referring to Figures 1-5 A kind of special wiring device for insulation resistance measurement, including the shell 10 of insulating material, A phase terminal 11, B phase terminal 12 and C phase terminal 13 are installed on one side of shell 10, L terminal terminal 14 and E terminal terminal 15 are installed on the other side of shell 10, first conductive row 40 and second conductive row 50 are fixedly installed in the bottom of shell 10 with interval, first line changing assembly 20 and second line changing assembly 30 are respectively installed in shell 10 above first conductive row 40 and second conductive row 50, first line changing assembly 20 and second line changing assembly 30 all include first elastic conductive plate 21, second elastic conductive plate 22 and third elastic conductive plate 23;First conductive row 40 is electrically connected with L terminal terminal 14, second conductive row 50 is electrically connected with E terminal terminal 15, first elastic conductive plate 21 is electrically connected with A phase terminal 11, second elastic conductive plate 22 is electrically connected with B phase terminal 12, third elastic conductive plate 23 is electrically connected with C phase terminal 13;Control device for respectively controlling the contact conduction of first elastic conductive plate 21, second elastic conductive plate 22 and third elastic conductive plate 23 with first conductive row 40 and second conductive row 50 is also installed on shell 10.
[0036] When using, A phase, B phase and C phase of primary equipment are connected with A phase terminal 11, B phase terminal 12 and C phase terminal 13 respectively, the "L" end and "E" end of megohmmeter can be connected with L terminal terminal 14 and E terminal terminal 15 in advance, so that it needs to control the contact of first elastic conductive plate 21, second elastic conductive plate 22 and third elastic conductive plate 23 on first line changing assembly 20 and second line changing assembly 30 with first conductive row 40 and second conductive row 50 by control device, so that line changing can be realized, the whole process does not need to repeatedly disassemble and connect wire, so that operation efficiency is improved.
[0037] In the embodiment, referring toFigure 5 The A-phase terminal 11, the B-phase terminal 12, the C-phase terminal 13, the L-terminal 14 and the E-terminal 15 each comprise a conductive seat 16, which is provided with a wire pressing hole 17 in the middle, and is embedded in the shell 10. A wire pressing screw 18 is screwed with the conductive seat 16 after passing through the shell 10, and the wire is pressed when the wire pressing screw 18 extends into the wire pressing hole 17.
[0038] In use, the wire head is inserted into the wire pressing hole 17 of the conductive seat 16, and then the wire pressing screw 18 is tightened. The wire is pressed when the wire pressing screw 18 extends into the wire pressing hole 17, and the wiring is simple and convenient.
[0039] Further, in order to improve the stability of the contact and conduction between the first, second and third elastic conductive plates 21, 22 and 23 and the first and second conductive rows 40 and 50, the lower side of the first, second and third elastic conductive plates 21, 22 and 23 is provided with a conductive contact 25. The conductive contact 25 can be silver which has better conductivity.
[0040] Referring to Figure 2 , 4 In the shell 10, a protruding seat 60 is provided on one side of the first and second conductive rows 40 and 50, and the first, second and third elastic conductive plates 21, 22 and 23 are fixed on the protruding seat 60. Through the above structure, the first, second and third elastic conductive plates 21, 22 and 23 are facilitated to be installed.
[0041] Specifically, the first, second and third elastic conductive plates 21, 22 and 23 are respectively fixed at one end on the protruding seat 60, and overhanging at the other end above the first or second conductive row 40 or 50.
[0042] Further, referring to Figure 4 The protruding seat 60 is provided with a plurality of limiting grooves 61, and the first, second and third elastic conductive plates 21, 22 and 23 are respectively fixed and installed in each limiting groove 61 by screws. The first, second and third elastic conductive plates 21, 22 and 23 are limited by the limiting grooves 61, so as to keep the first, second and third elastic conductive plates 21, 22 and 23 apart and not to rotate, thereby improving the stability of the installation of the first, second and third elastic conductive plates 21, 22 and 23.
[0043] In this embodiment, referring to Figure 3The control device is six locking screws 24 screwed on the shell 10, and the six locking screws 24 correspond to the first elastic conductive plate 21, the second elastic conductive plate 22 and the third elastic conductive plate 23 respectively. By screwing different locking screws 24, the corresponding first elastic conductive plate 21, second elastic conductive plate 22 and third elastic conductive plate 23 are in contact with the first conductive row 40 or the second conductive row 50, and the structure is simple.
[0044] When one of the locking screws 24 is tightened, the threaded end of the locking screw 24 presses down the elastic conductive plate until the elastic conductive plate is in contact with the conductive row, thereby conducting electricity.
[0045] Further, in order to ensure that the elastic conductive plate is in contact with the conductive row, the locking screw 24 needs to be tightened, but if it is tightened too much, the elastic conductive plate may be deformed and unable to rebound and separate, therefore, on the upper side of the first elastic conductive plate 21, the second elastic conductive plate 22 and the third elastic conductive plate 23, at the position corresponding to the locking screw 24, an elastic insulating pad 26 is fixedly installed. In this way, when the locking screw 24 is tightened, the elastic conductive plate is in contact with the conductive row, and if it is further tightened until the tail of the screw abuts against the shell 10, the threaded head of the locking screw 24 will press the elastic insulating pad 26, causing the elastic insulating pad 26 to deform.
[0046] In the embodiment, the shell 10 includes a groove body 101 and a cover plate 102, and the cover plate 102 is installed on the groove body 101 by screws, and the control device is installed on the cover plate 102.
[0047] The use method or principle of the utility model:
[0048] Referring to Figure 2 , 3 When in use, the A phase, the B phase and the C phase of the primary equipment are connected with the A phase terminal 11, the B phase terminal 12 and the C phase terminal 13 respectively, and the "L" end and the "E" end of the megohmmeter can be connected with the L terminal 14 and the E terminal 15 respectively in advance.
[0049] Referring to Figure 2 , 3 , in combination with Figure 6 When the insulation resistance value of the A phase of the primary equipment is measured:
[0050] The first elastic conductive plate 21 of the first line changing assembly 20 is in contact with the first conductive row 40;
[0051] The second elastic conductive plate 22 and the third elastic conductive plate 23 of the second line changing assembly 30 are in contact with the second conductive row 50.
[0052] Referring to Figure 7 When the insulation resistance value of the B phase of the primary equipment is measured:
[0053] The second elastic conductive plate 22 of the first line changing assembly 20 is in contact with the first conductive row 40;
[0054] The first elastic conductive plate 21 and the third elastic conductive plate 23 of the second line changing assembly 30 are in contact with the second conductive row 50.
[0055] Referring to Figure 8 When measuring the insulation resistance value of the phase C of the primary equipment:
[0056] The third elastic conductive plate 23 of the first line changing assembly 20 is in contact with the first conductive row 40;
[0057] The first elastic conductive plate 21 and the second elastic conductive plate 22 of the second line changing assembly 30 are in contact with the second conductive row 50.
[0058] Referring to Figure 9 When discharging the three phases of the primary equipment A, B and C:
[0059] The first elastic conductive plate 21, the second elastic conductive plate 22 and the third elastic conductive plate 23 of the second line changing assembly 30 are all in contact with the second conductive row 50, and discharging is performed.
Claims
1. A dedicated wiring device for measuring insulation resistance, characterized in that: The device includes a housing made of insulating material. One side of the housing is equipped with an A-phase terminal, a B-phase terminal, and a C-phase terminal, while the other side of the housing is equipped with an L-phase terminal and an E-phase terminal. A first conductive bar and a second conductive bar are fixedly installed at intervals at the bottom of the housing. A first line-changing assembly and a second line-changing assembly are respectively installed above the first and second conductive bars inside the housing. Both the first and second line-changing assemblies include a first elastic conductive plate, a second elastic conductive plate, and a third elastic conductive plate. The first conductive busbar is electrically connected to the L-end terminal, and the second conductive busbar is electrically connected to the E-end terminal. The first elastic conductive plate is electrically connected to the A-phase terminal, the second elastic conductive plate is electrically connected to the B-phase terminal, and the third elastic conductive plate is electrically connected to the C-phase terminal. The housing is also equipped with a control device for controlling the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate to make contact with the first conductive bar and the second conductive bar to conduct electricity.
2. The wiring device for measuring insulation resistance according to claim 1, characterized in that: The A-phase terminal, B-phase terminal, C-phase terminal, L-end terminal, and E-end terminal all include a conductive base. The conductive base has a wire pressing hole in the middle. The conductive base is embedded in the housing. The wire pressing screw passes through the housing and is screwed into the conductive base. When the wire pressing screw extends into the wire pressing hole, it presses the wire tightly.
3. The wiring device for measuring insulation resistance according to claim 1, characterized in that: Conductive contacts are provided on the lower side of the first, second, and third elastic conductive plates.
4. The wiring device for measuring insulation resistance according to claim 1, characterized in that: Inside the housing, a protruding seat is provided on one side of the first and second conductive bars, and the first, second, and third elastic conductive plates are fixed on the protruding seat.
5. A wiring device for measuring insulation resistance according to claim 4, characterized in that: The protruding seat is provided with multiple limiting grooves, and the first elastic conductive plate, the second elastic conductive plate and the third elastic conductive plate are respectively fixedly installed in each of the limiting grooves by screws.
6. A wiring device for measuring insulation resistance according to any one of claims 1-5, characterized in that: The control device consists of six locking screws screwed onto the housing, with each of the six locking screws corresponding to a first elastic conductive plate, a second elastic conductive plate, and a third elastic conductive plate, respectively.
7. A wiring device for measuring insulation resistance according to claim 6, characterized in that: On the upper side of the first, second, and third elastic conductive plates, at positions corresponding to the locking screws, elastic insulating pads are fixedly installed.
8. The wiring device for measuring insulation resistance according to claim 1, characterized in that: The housing includes a tank and a cover plate, with the cover plate mounted on the tank and the control device mounted on the cover plate.