Winding device for testing

Abstract

The utility model relates to the technical field of electrical performance testing devices, in particular to a winding device for testing. The winding device for testing comprises a junction box and an excitation cable, the excitation cable is a multi-core cable, the junction box is provided with a collinear terminal, the collinear terminal is conductively connected with one end of each of all wire cores of the multi-core cable, the junction box is further provided with a plurality of turn number selection terminals, each turn number selection terminal is connected to the other end of the multi-core cable, and each turn number selection terminal is electrically connected with the excitation cable. The plurality of wire cores are respectively connected with different numbers of wire cores in the multi-core cable; the winding device for testing is simple in structure and low in cost, the number of testing turns can be conveniently and rapidly switched and adjusted, the efficiency and accuracy of excitation testing are improved, defects in an iron core can be accurately detected, and defective products are prevented from flowing into the market.

Description

TECHNICAL FIELD

[0001] The utility model relates to the testing device technical field of electric performance especially relates to a winding device for testing. BACKGROUND

[0002] The magnetic property is the most important parameter of the core as the main component of the transformer, and the no-load performance test and the excitation test are usually needed after the production of the transformer core, the no-load performance test is mainly used for evaluating the performance and state of the transformer under the no-load state, the excitation test is using the electromagnetic induction principle, and the magnetic field is generated by applying certain excitation current to the core, and the magnetic induction intensity, excitation current and other parameters of the core are measured, so that whether the core has potential faults such as crack, looseness and poor insulation can be detected, in the traditional excitation test, the wire 1 is used to simulate the winding of the coil on the core 2 for excitation, for details, please refer to Figure 1 But the winding process of the wire 1 is time-consuming and laborious and prone to error, and the test efficiency is low.

[0003] In view of the above problems, the Chinese invention patent with the authorization announcement number CN103091588B and the authorization announcement date of 2015.01.14 discloses a kind of winding device for testing transformer core, the device includes integrated coil obtained by a plurality of winding integration, integrated coil is used to be wrapped on the transformer core to be measured, and both ends are respectively electrically connected with plug-in connector, the plug-in connector connected at both ends is connected with connection control circuit, connection control circuit is connected with controller, controller is connected with input device, input device is used to input test turns to controller, controller adjusts the series connection quantity of winding in integrated coil according to the test turns input by connection control circuit, connection control circuit includes a plurality of intermediate relays, one end of intermediate relay is connected with controller, the other end is connected with power supply, while the moving contact of normally open contact of intermediate relay is connected with any one plug-in connector, and static contact is connected with another plug-in connector, the winding connected by two plug-in connectors can be series connected by the normally open contact of intermediate relay, so that the coil turns formed after winding series connection in integrated coil are consistent with the test turns input by input device.

[0004] But the structure of the above scheme is too complex, many intermediate relays are needed, the cost is higher, when a plurality of intermediate relays work simultaneously, voltage distribution is uneven, which affects the result of excitation test, when a certain intermediate relay fails, the result measured by excitation test will also have large deviation, and the troubleshooting difficulty is large, which can easily lead to the whole device cannot continue to be used, when the structure of excitation test has deviation, the defects existing in the core can not be found in time and accurately, so that the defective products flow into the market. UTILITY MODEL CONTENT

[0005] The utility model discloses a winding device for test purposes, which aims to solve the problem that the existing winding device needs multiple intermediate relays to work together, has a high cost, is prone to failure, causes deviation in excitation test results, and cannot timely find defects in the iron core.

[0006] To achieve the above object, the winding device for test purposes of the utility model adopts the following technical scheme:

[0007] A winding device for test purposes, comprising a junction box and an excitation cable, the excitation cable being a multi-core cable, the junction box having a common terminal, the common terminal being electrically connected to one end of all the cores of the multi-core cable, the junction box further having a plurality of turn selection terminals, each turn selection terminal being connected to the other end of the multi-core cable and being connected to different numbers of cores in the multi-core cable.

[0008] Further, the number of cores connected by each turn selection terminal is arranged in an arithmetic sequence.

[0009] Further, the common difference of the arithmetic sequence is 1.

[0010] Further, the two ends of the multi-core cable are respectively connected with plugs, and the junction box is provided with two sockets, the two sockets being respectively plugged and connected with the plugs at the two ends of the multi-core cable.

[0011] Further, the two sockets are respectively located on the side surface and the top surface of the junction box, and the plugs at the two ends of the multi-core cable are plugged into the side surface and the top surface of the junction box through the corresponding sockets.

[0012] Further, the common terminal is located on one side of the socket on the top surface of the junction box.

[0013] Further, the turn selection terminals are arranged on the top surface of the junction box in a matrix form.

[0014] Further, the multi-core cable is provided with an outer sheath, and the outer sheath is located between the two plugs at the two ends of the multi-core cable.

[0015] Further, the outer sheath is a heat-shrinkable sheath, and the outer sheath is used to sleeve a plurality of cores into a bundle to form the multi-core cable.

[0016] Beneficial effects: the winding device for testing of the utility model is an opening-up invention. By setting the common terminal on the junction box, all the cores of the multi-core cable at one end are conductively connected on the common terminal, by setting a plurality of turns selection terminals on the junction box, the other end of the cores of the multi-core cable are respectively connected on each turns selection terminal, and the number of the cores connected by each turns selection terminal is different, then in use, the common terminal and the turns selection terminal are connected with the power supply, a power supply path with a plurality of single-turn coils is formed, the plurality of single-turn coils can replace the coils with different turns, the specific number of the single-turn coils is consistent with the number of the cores connected on the turns selection terminal, by connecting the power supply with different turns selection terminals, the power supply path composed of different number of single-turn coils is obtained, in the process of testing, according to the required test turns, the connected turns selection terminal is switched to obtain the corresponding test turns, and the structure is simple, the cost is low, the test turns can be quickly switched and adjusted, the efficiency and accuracy of the excitation test are improved, the defects in the iron core can be accurately detected, and the defective products can be prevented from flowing into the market. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic diagram that the wire simulation coil is wound on the iron core for excitation.

[0018] Figure 2 It is a main view structure schematic diagram that one embodiment of the winding device for testing of the utility model is wound on the iron core.

[0019] Figure 3 It is a structure schematic diagram that the wire simulation coil is wound on the iron core for excitation. Figure 2 It is a top view structure schematic diagram.

[0020] In the drawing: 1, wire; 2, iron core; 3, junction box; 4, multi-core cable; 5, common terminal; 6, turns selection terminal; 7, plug; 8, outer sheath. DETAILED DESCRIPTION

[0021] The features and performances of the utility model are further described in detail in combination with the embodiments.

[0022] When the core is excited, a wire is usually manually wound on the core to simulate a multi-turn coil, or an integrated coil integrated by several winding sets is used to realize the adjustment of the test turns by controlling the opening and closing of the intermediate relay. However, the manual winding of the wire is time-consuming and laborious, and the turns are easy to be wound incorrectly. The structure of the intermediate relay is complex, and the cost is high. Therefore, the winding of a wire for multiple turns can be converted into the use of multiple cores in parallel, and each core forms a single-turn closed loop, thereby obtaining multiple single-turn closed loops, to replace the multi-turn coil formed by winding a wire for multiple turns. One end of the multiple cores is connected to the common terminal, and the other end of the multiple cores is connected to the corresponding different turn selection terminals. The common terminal and the different turn selection terminals are electrically connected, and the closed loop path composed of different numbers of single-turn coils is obtained. Based on the above invention, the utility model provides a winding device for testing, which is connected to the common terminal at one end of the multi-core cable composed of several cores and connected to the different turn selection terminals at the other end. The common terminal and the different turn selection terminals are electrically connected, and the adjustment of the test turns is realized.

[0023] The embodiment of the winding device for testing of the utility model:

[0024] Referring to Figures 2 to 3 As a basic embodiment of the utility model, the winding device for testing includes a junction box 3 and an excitation cable. The excitation cable is a multi-core cable 4. The junction box 3 has a common terminal 5, and the common terminal 5 is electrically connected to one end of all the cores of the multi-core cable 4. The junction box 3 also has a plurality of turn selection terminals 6, each of which is connected to the other end of the multi-core cable 4 and connects different numbers of cores in the multi-core cable 4. When the device is used, the common terminal 5 and the turn selection terminal 6 are connected to the power supply, or the common terminal 5 and the turn selection terminal 6 are connected through a jumper, thereby forming a power supply path with multiple single-turn coils. The multiple single-turn coils can replace coils with different numbers of turns. The number of single-turn coils is consistent with the number of cores connected to the turn selection terminal 6. By connecting the power supply to different turn selection terminals 6, a power supply path composed of different numbers of single-turn coils is obtained. During the excitation test, the corresponding test turns are obtained by switching the connected turn selection terminals 6 according to the required test turns. Moreover, the structure of the device is simple, the efficiency of the device is higher than that of manually winding a wire 1, and the device is less prone to errors. Compared with using multiple intermediate relays, the device is low in cost and less prone to failure. The device can facilitate quick switching and adjustment of test turns, improve the efficiency and accuracy of excitation tests, accurately detect defects in the core 2, and prevent defective products from entering the market.

[0025] As a preferred embodiment of the utility model, the number of cores connected by each number of turns selection terminal 6 is arranged in an arithmetic sequence, in other embodiments, the number of cores connected by each number of turns selection terminal 6 can also be irregularly and arbitrarily arranged, as long as the number of cores connected by each number of turns selection terminal 6 is not repeated, and the specific number of cores can be set according to the test requirements, as long as it can meet the test requirements.

[0026] As a preferred embodiment of the utility model, the common difference of the arithmetic sequence is 1, at this time, the number of single-turn coils formed by each number of turns selection terminal 6 is 1, 2,..., (N-1) and N, when the common terminal 5 is in conductive connection with each number of turns selection terminal 6, the corresponding test number of turns obtained is 1, 2,..., (N-1) and N, in this embodiment, the switching accuracy of the obtained test number of turns is high, in other embodiments, the common difference of the number of cores connected by the number of turns selection terminal 6 can also be set to 2, at this time, the number of single-turn coils formed by each number of turns selection terminal 6 is 2, 4,..., (N-2) and N, when the common terminal 5 is in conductive connection with each number of turns selection terminal 6, the corresponding test number of turns obtained is 2, 4,..., (N-2) and N, or the common difference can be set to be larger, at this time, the switching accuracy of the obtained test number of turns is reduced, and the specific common difference value can be set according to the required test number of turns, as long as it can meet the test requirements.

[0027] As a preferred embodiment of the utility model, the two ends of the multi-core cable 4 are respectively connected with the plug 7, and the junction box 3 is provided with two sockets, the two sockets are respectively plugged and connected with the plugs 7 at the two ends of the multi-core cable 4, through the stable plug connection of the socket and the plug 7, the connection reliability of the multi-core cable 4 and the junction box 3 can be improved, and the multi-core cable 4 and the junction box 3 are prevented from being separated in the process of excitation test, so that the excitation test is interrupted or the device is damaged, in addition, the two ends of the multi-core cable 4 are plugged on the junction box 3 through the plug 7, so that the connection of the multi-core cable 4 and the junction box 3 is convenient, fast and easy to disassemble, when in use, the plug 7 at the two ends of the multi-core cable 4 is only needed to be plugged into or pulled out of the corresponding socket, so that the winding and unwinding of the multi-core cable 4 on the iron core 2 can be realized, and the rapid deployment and rapid end of the excitation test are facilitated. In other embodiments, the multi-core cable 4 can be directly connected with the number of turns selection terminal 6 on the junction box 3 without plug and socket plug connection, and the conductive connection of the multi-core cable 4 and the number of turns selection terminal 6 can also be realized, at this time, only the plug 7 at one end of the multi-core cable 4 connected with the common terminal 5 is needed to be plugged and pulled out of the socket, so that the winding and unwinding of the multi-core cable 4 on the iron core 2 can be realized.

[0028] As a preferred embodiment of the utility model, two sockets are respectively located on the side and top surface of the junction box 3, and the plugs 7 at both ends of the multi-core cable 4 are plugged into the side and top surface of the junction box 3 through the corresponding sockets, the two sockets are arranged on different surfaces, so that the plugging space of the plug 7 and the socket is large, mutual interference when arranged on the same surface is avoided, the plug 7 is prevented from being loose due to not being plugged into the socket, and it is ensured that the two plugs 7 can be stably plugged into the corresponding sockets.

[0029] As a preferred embodiment of the utility model, the common line terminal 5 is located on one side of the socket on the top surface of the junction box 3.

[0030] As a preferred embodiment of the utility model, the number of turns selection terminal 6 is located on the top surface of the junction box 3 and arranged in a matrix, so that the number of turns selection terminal 6 and the common line terminal 5 are located on the same end surface of the junction box 3, the connection of the common line terminal 5 and the number of turns selection terminal 6 is facilitated, the distance between two adjacent number of turns selection terminals 6 is small due to the matrix arrangement of the number of turns selection terminal 6, and the rapid switching of the number of turns selection terminal 6 is facilitated.

[0031] As a preferred embodiment of the utility model, the multi-core cable 4 is provided with an outer sheath 8, the outer sheath 8 is located between the two plugs 7 at both ends of the multi-core cable 4, the outer sheath 8 can protect the multi-core cable 4, the multi-core cable 4 is prevented from being directly exposed to the external environment, and the aging of the multi-core cable 4 can be slowed down.

[0032] As a preferred embodiment of the utility model, the outer sheath 8 is a heat shrinkable sheath, the outer sheath 8 is used for sleeving a plurality of wire cores into a bundle to form the multi-core cable 4, the heat shrinkable sheath is a plastic sleeve that shrinks when heated, the heat shrinkable sheath is sleeved on the multi-core cable 4, the heat shrinkable sheath is heated by using a hair dryer, and the heat shrinkable sheath shrinks tightly on the surface of the multi-core cable 4, so that the wire core is not damaged and the plurality of wire cores can be wrapped, movement of the wire core is avoided, and the multi-core cable 4 is formed.

[0033] The assembly process of the testing winding device of the utility model is as follows: first, the outer sheath 8 is sleeved outside the plurality of aligned wire cores, the outer sheath 8 is heated by using a hair dryer, the outer sheath 8 is tightly wrapped outside the plurality of wire cores, the multi-core cable 4 is formed, the two ends of the multi-core cable 4 are connected with the plugs 7 respectively, the plugs 7 at both ends are plugged into the two sockets of the junction box 3 respectively, all the wire cores at one end of the multi-core cable 4 are connected with the common line terminal 5 in a conductive manner, the wire cores at the other end are connected with the number of turns selection terminals 6 respectively, each number of turns selection terminal 6 is connected with different numbers of wire cores, and the device is assembled.

[0034] The use process of the winding device for testing is as follows: the multi-core cable 4 is wound outside the iron core 2, and the plugs 7 at two ends are respectively plugged into two sockets on the junction box 3, the winding of the device on the iron core 2 is realized, then the common terminal 5 and the number of turns selection terminal 6 relative to the required number of test turns are connected with the power supply, a power supply path formed by single-turn coils with corresponding number is obtained, and the excitation test can be started, if the number of test turns needs to be adjusted, the number of turns selection terminal 6 connected with the power supply is switched, the adjustment of the number of test turns can be realized, after the excitation test is finished, the plug 7 at any one end of the multi-core cable 4 is pulled out of the corresponding socket, and the unwinding of the device and the transformer iron core 2 can be realized.

[0035] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, the patent protection scope of the utility model is accurate with the claim, equivalent structural changes made by applying the contents of the specification and drawings of the utility model should be reasonably included in the protection scope of the utility model.

Claims

1. A test winding device, characterized in that: The device includes a junction box and an excitation cable. The excitation cable is a multi-core cable. The junction box has a common-line terminal, which is electrically connected to one end of all the cores of the multi-core cable. The junction box also has multiple turns selection terminals, each of which is connected to the other end of the multi-core cable and to a different number of cores within the multi-core cable.

2. The test winding device according to claim 1, characterized in that: The number of wire cores connected to each turn selection terminal is set in an arithmetic sequence.

3. The test winding device according to claim 2, characterized in that: The common difference of the arithmetic sequence is 1.

4. The test winding device according to any one of claims 1-3, characterized in that: The multi-core cable has plugs connected to both ends, and the junction box has two sockets that are connected to the plugs at both ends of the multi-core cable.

5. The test winding device according to claim 4, characterized in that: The two sockets are located on the side and top of the junction box, respectively, and the plugs at both ends of the multi-core cable are plugged into the side and top of the junction box through the corresponding sockets.

6. The test winding device according to claim 5, characterized in that: The common-line terminal is located on the socket side of the top surface of the junction box.

7. The test winding device according to claim 1 or 5, characterized in that: The number of turns selection terminals are located on the top surface of the junction box and are arranged in a matrix.

8. The test winding device according to claim 4, characterized in that: The multi-core cable is provided with an outer sheath, which is located between the two plugs at both ends of the multi-core cable.

9. The test winding device according to claim 8, characterized in that: The outer sheath is a heat-shrinkable sheath, which is used to bundle multiple wire cores together to form a multi-core cable.

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