A medium-voltage cable testing mechanism

Abstract

The present invention discloses a medium-voltage cable testing mechanism, which includes a testing box. The testing box has a cube structure, and two vertical and horizontal partition boards are correspondingly installed inside the testing box, thereby dividing the space inside the testing box into a nine-grid structure. The middle area inside the testing box is set as the middle area, the areas at the four corners of the testing box are set as the separated areas, the middle area at the upper end of the testing box is the cold testing area, the middle area at the lower end of the testing box is the hot testing area, and the areas on both sides in the middle of the testing box are the performance testing areas. This device can not only complete the power-on testing of medium-voltage cables in cold and hot environments, but also complete the power-on testing of medium-voltage cables under the condition of being pressed, and at the same time can also complete the power-on testing of medium-voltage cables under the condition of being bent and the power-on testing of cables under the condition of both being pressed and bent. By integrating multiple testing mechanisms together, the structure is ingeniously and reasonably set, and it is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of production equipment for medium - voltage cables, and specifically relates to a medium - voltage cable testing mechanism. Background Art

[0002] In the prior art, after a medium - voltage cable is specifically prepared, cable testing is required. Usually, the test contents include the power - on situation test under cold and hot environments, and the power - on test under pressure and bending conditions.

[0003] In the existing testing mechanisms, the above - mentioned testing mechanisms are usually set separately. For example, in the hot - environment test, the cable needs to be placed in a thermal box. After adjusting the temperature of the box body to the required temperature, the power - on situation of the cable is tested; the cold - environment test is also set in the same way, and a specific environment needs to be set first before testing.

[0004] In addition, in the compression - resistance and bending - resistance test environments, pressure tests and bending tests on the cable are also required. These devices usually need a separate testing mechanism to complete, and the setting of each device will increase the cost of the overall testing mechanism. In the prior art, these testing mechanisms cannot be integrated.

[0005] Therefore, in order to solve the above problems, it is necessary to develop a medium - voltage cable testing mechanism with a reasonable structure that can integrate multiple testing mechanisms. Summary of the Invention

[0006] The purpose of the present invention is to provide a medium - voltage cable testing mechanism for the deficiencies existing in the prior art. Its technical solution is as follows:

[0007] A medium - voltage cable testing mechanism includes a testing box. The testing box is of a cube structure, and two vertical and horizontal partition boards are correspondingly installed inside the testing box, thereby dividing the space inside the testing box into a nine - grid structure; the middle area inside the testing box is set as the middle area, the areas at the four corners of the testing box are set as partition areas, the middle area at the upper end of the testing box is set as the cold - test area, the middle area at the lower end of the testing box is set as the hot - test area, and the areas on both sides in the middle of the testing box are set as performance - test areas;

[0008] Openings are provided on the partition boards on the four sides of the middle area, and are correspondingly connected to the four surrounding areas through the openings in the four directions. Transverse movement mechanisms are correspondingly installed in the partition areas. Gate plates are correspondingly installed on the main shafts of the transverse movement mechanisms. The main shaft of each transverse movement mechanism correspondingly extends into the adjacent test area on the right, and the gate plate on the main shaft correspondingly blocks the opening;

[0009] A refrigeration device is correspondingly installed in the described cold test area to refrigerate the cold test area; a heating device is correspondingly installed in the described hot test area to heat the hot test area; a medium-voltage cable to be tested is correspondingly arranged in the middle area, and a temperature measuring element is also correspondingly installed in the middle area.

[0010] Furthermore, pressure mechanisms are correspondingly installed in the performance test areas on both sides of the test box. The positions of the pressure mechanisms on both sides correspond to the positions of the openings on both sides of the middle area. Pressure plates are correspondingly installed on the main shafts of the pressure mechanisms on both sides. The pressure plates on both sides can enter the middle area from the openings correspondingly to apply pressure to the medium-voltage cable in the middle area from both sides.

[0011] Furthermore, mounting seats are also arranged on the main shafts of the pressure mechanisms on both sides. Rotary motors are also arranged on the mounting seats, and the pressure plates are correspondingly installed on the main shafts of the rotary motors;

[0012] Spring grooves are also arranged at the upper and lower end positions of the pressure plates. Spring elements are correspondingly installed in the spring grooves, and top blocks are also correspondingly installed in the spring grooves. The spring elements are correspondingly fixed on the top blocks; the top blocks at the upper and lower end positions of the pressure plates on both sides correspond to each other. When the pressure plates on both sides squeeze the medium-voltage cable in the middle area, the top blocks on both sides are pushed against each other and retract into the spring grooves under the action of pressure to realize the clamping of the medium-voltage cable.

[0013] After the rotary motors are started, they drive the pressure plates on both sides to rotate simultaneously. Under the blocking and restriction of the upper and lower top blocks, the medium-voltage cable in the middle is correspondingly rotated and bent.

[0014] Furthermore, serrated card slots and blocks corresponding in position are arranged at the ends of the top blocks. When the top blocks on both sides are correspondingly pressed together, the card slots and blocks are cooperatively clamped.

[0015] Furthermore, doors that can be opened are correspondingly installed on both sides of the middle area in the middle of the test box through hinge assemblies; inner holes for the medium-voltage cable to pass through correspondingly are arranged on the doors; the medium-voltage cable passes through between the doors on both sides and is suspended at the middle position in the middle area.

[0016] Furthermore, flow stirring devices are also installed on both sides of the doors. The flow stirring devices on both sides can stir the space in the middle area to make the temperature in the middle area uniform.

[0017] Furthermore, a total of four temperature measuring elements are arranged in the middle area, and the installation positions of the temperature measuring elements do not conflict with the opening positions.

[0018] Furthermore, inlet roller groups are correspondingly installed outside both ends of the middle region, and the medium-voltage cable to be tested is clamped by the inlet roller groups on both sides and enters the middle region.

[0019] Furthermore, insulating layers are correspondingly arranged on the side walls of the cold test area 5 and the hot test area 6.

[0020] Beneficial effects: The present invention has the following beneficial effects: This device can not only complete the power-on test of medium-voltage cables in cold and hot environments, but also complete the power-on test of medium-voltage cables under the condition of being pressed, and at the same time, it can also complete the power-on test of medium-voltage cables under the condition of being bent and the power-on test of cables under the condition of simultaneous pressing and bending. By integrating multiple test mechanisms together, the structure is ingeniously and reasonably arranged and is convenient to use. Description of the Drawings

[0021] Figure 1 is the structural diagram of the present invention;

[0022] Figure 2 is the position diagram of the gate plate in the present invention;

[0023] Figure 3 is Figure 2 the A-A cross-sectional view;

[0024] Figure 4 is the installation position diagram of the top block in the present invention;

[0025] Among them, test box 1; partition 2; middle region 3; separated region 4; cold test region 5; hot test region 6; performance test region 7; opening 8; transverse movement mechanism 9; gate plate 10; refrigeration equipment 11; heating equipment 12; medium-voltage cable 13; temperature measuring element 14; pressure mechanism 15; pressing plate 16; mounting seat 17; rotating motor 18; spring groove 19; spring member 20; top block 21; card slot 22; clamping block 23; door panel 24; inner hole 25; flow stirring equipment 26; inlet roller group 27. Specific Embodiments

[0026] The following further clarifies the present invention in conjunction with the drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present invention, and 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.

[0027] Such as Figures 1 to 4As shown in the figure, a medium-voltage cable testing mechanism includes a testing box 1, which has a cube structure. Inside the testing box 1, two vertical and horizontal partition boards 2 are correspondingly installed, dividing the space inside the testing box 1 into a nine-grid structure. The middle area inside the testing box 1 is set as the middle area 3, the areas at the four corners of the testing box 1 are set as the partition areas 4, the middle area at the upper end of the testing box 1 is set as the cold testing area 5, the middle area at the lower end of the testing box 1 is set as the hot testing area 6, and the areas on both sides in the middle of the testing box 1 are set as the performance testing areas 7.

[0028] Openings 8 are provided on the partition boards 2 on the four sides of the middle area 3, and are correspondingly connected to the surrounding four areas through the openings 8 in four directions. Transverse movement mechanisms 9 are correspondingly installed in the partition areas 4, and gate plates 10 are correspondingly installed on the main shafts of the transverse movement mechanisms 9. The main shaft of each transverse movement mechanism 9 correspondingly extends into the adjacent testing area on the right, and the gate plate 10 on the main shaft correspondingly blocks the opening 8.

[0029] A refrigeration device 11 is correspondingly installed in the cold testing area 5 to refrigerate the cold testing area 5; a heating device 12 is correspondingly installed in the hot testing area 6 to heat the hot testing area 6; a medium-voltage cable 13 to be tested is correspondingly set in the middle area 3, and a temperature measuring element 14 is also correspondingly installed in the middle area 3.

[0030] Pressure mechanisms 15 are correspondingly installed in the performance testing areas 7 on both sides of the testing box 1. The positions of the pressure mechanisms 15 on both sides correspond to the positions of the openings 8 on both sides of the middle area 3. Pressure plates 16 are correspondingly installed on the main shafts of the pressure mechanisms 15 on both sides. The pressure plates 16 on both sides can correspondingly enter the middle area 3 from the openings 8 to apply pressure to the medium-voltage cable 13 in the middle area 3 from both sides.

[0031] Mounting seats 17 are also provided on the main shafts of the pressure mechanisms 15 on both sides, and rotary motors 18 are provided on the mounting seats 17. The pressure plates 16 are correspondingly installed on the main shafts of the rotary motors 18.

[0032] Spring grooves 19 are also provided at the upper and lower end positions of the pressure plates 16. Spring elements 20 are correspondingly installed in the spring grooves 19, and top blocks 21 are also correspondingly installed in the spring grooves 19. The spring elements 20 are correspondingly fixed on the top blocks 21. The top blocks 21 at the upper and lower end positions of the pressure plates 16 on both sides correspond to each other. When the pressure plates 16 on both sides squeeze the medium-voltage cable 13 in the middle area 3, the top blocks 21 on both sides push against each other and retract into the spring grooves 19 under the pressure, realizing the clamping of the medium-voltage cable 13.

[0033] After the rotary motors 18 are started, they drive the pressure plates 16 on both sides to rotate simultaneously. Under the blocking and restriction of the upper and lower top blocks 21, the middle medium-voltage cable 13 is correspondingly rotated and bent.

[0034] At the end of the top block 21, there are also serrated card slots 22 and clamping blocks 23 corresponding in position. When the top blocks 21 on both sides are pressed together correspondingly, the card slots 22 and the clamping blocks 23 are cooperatively clamped and installed.

[0035] On both sides of the middle area 3 in the middle of the test box 1, there are door panels 24 that can be opened correspondingly through hinge assemblies; on the door panels 24, there are inner holes 25 for the medium-voltage cable 13 to pass through correspondingly; the medium-voltage cable 13 passes through between the door panels 24 on both sides and is suspended at the middle position of the middle area 3.

[0036] On both of the door panels 24 on both sides, there are also turbulence devices 26 installed. The turbulence devices 26 on both sides can stir the space in the middle area 3 to make the temperature in the middle area 3 uniform.

[0037] There are a total of four temperature measuring elements 14 in the middle area 3, and the installation positions of the temperature measuring elements 14 do not conflict with the position of the opening 8.

[0038] At the two ends outside the middle area 3, there are also inlet roller groups 27 installed correspondingly. The medium-voltage cables to be tested are clamped by the inlet roller groups 27 on both sides and enter the middle area 3; there are corresponding interlayers on the side walls of the cold test area 5 and the hot test area 6.

[0039] The specific working principle of this device is as follows: In this device, first, the medium-voltage cable to be tested needs to be placed in the middle area. There are openable door panels on both sides of the middle area. There are inner holes on the door panels through which the medium-voltage cable can pass. Pass the medium-voltage cable through the inner holes on the door panels to suspend the medium-voltage cable in the middle area, and then place both ends of the medium-voltage cable on the inlet roller groups on both sides to start the test.

[0040] When conducting hot and cold environment tests, for example, the sluice gate can be controlled through the transverse movement mechanism in the partition area to open the opening in the hot test area, so that the lower hot test area is connected to the upper middle area. Then, turn on the heating equipment in the hot test area to heat the hot test area. Using the principle that hot air rises, the hot air rises into the middle area, and the openings in other positions are blocked by the sluice gate. Through the heating of the heating equipment in the hot test area, the temperature in the middle area gradually rises, and there are several temperature measuring elements with different positions correspondingly set in the middle area. The temperature in the middle area is monitored through the temperature measuring elements. When the temperature rises to the required test temperature, the medium-voltage cable can be connected to the power supply for testing accordingly.

[0041] When the cold area test is performed accordingly, the same operation is performed, and the gate in the cold test area is opened accordingly to connect the cold test area with the middle area, and then the refrigeration equipment in the cold test area is turned on to reduce the temperature of the cold test area and the middle area to the required test temperature, after which the cold area test can be performed.

[0042] The test box of this device is set as a nine-square grid structure. On the one hand, it is convenient to set up various test areas. Another important point is that separation areas are set at the four corners. The setting of the separation area, on the one hand, provides sufficient installation space for the transverse movement mechanism; on the other hand, it effectively isolates the temperature transfer between the hot test area and the cold test area; if the hot and cold test areas are connected to the performance test areas, it is very likely that the temperature will be transferred to the performance test area, causing unnecessary trouble; after setting up the isolation area, the heat will not be easily transferred to the performance test area, and the safety of the overall structure is increased by the isolation area; in addition, partitions are set in the hot and cold test areas of this device, which can also effectively prevent heat loss, and the structure is reasonable.

[0043] In the hot and cold tests, the door panels on both sides of the middle area are equipped with flow stirring devices. The flow stirring devices can evenly diffuse the temperature in the middle area and the connected test area, making the internal temperature uniform. With the cooperation of several temperature measuring elements, the temperature value in the middle area can be accurately measured, thereby increasing the accuracy of the test.

[0044] The technical solution of the present invention can not only carry out hot and cold tests, but also carry out power-on tests under compression and bending resistance conditions; pressure mechanisms are correspondingly installed in the performance test areas on both sides of the test box, and during the test, the gates in the performance test areas on both sides can be opened by the transverse structure; the pressure plates on the main shafts of the pressure mechanisms on both sides can be extended into the middle area to squeeze the suspended medium-voltage cable, and at this time, the power supply of the medium-voltage cable can be turned on to carry out a power-on test to test the power-on condition when the cable is compressed.

[0045] Furthermore, the present invention can also realize the power-on condition of the medium voltage cable when it is bent; further, the device is provided with a mounting seat on the main shaft of the pressure mechanism, a rotating motor is provided on the mounting seat, the pressure plate is provided on the rotating motor, and top blocks are correspondingly provided above and below the pressure plate through spring grooves and spring parts.

[0046] After such design, when the pressure plates on both sides are tightened accordingly, first of all, if the cable is to be tightened, the pressure plates on both sides can be tightened accordingly, and at the same time, the top blocks at the upper and lower ends press against each other and are then pressed into their respective spring grooves, which will not affect the cable compression at all.

[0047] If the cable is selected to be bent while being pressed at this time, the rotation motor can be directly turned on to drive the pressing plate to rotate. Since both the upper and lower sides are blocked by the top blocks, when the rotation motor drives the pressing plate to rotate, the cable pressed inside will also be rotated and bent accordingly. At this time, the power supply is turned on for testing, and the power-on test can be carried out under the condition that the cable is pressed and bent.

[0048] If only bending the cable is selected, then when controlling the pressing plates on both sides to press inward, only the top blocks at the upper and lower ends need to be pressed against each other, and the pressing plates do not press the cable. At this time, the rotation motor is driven to drive the pressing plate to rotate, and the rotation and bending of the cable can be achieved without pressing the cable. Then, the power supply is turned on for testing. The cable is only bent without being pressed, and different situations can be selected for testing.

[0049] The above specific implementation manner is only a preferred embodiment of the present invention, and is not used to limit the implementation and the scope of the claims of the present invention. Any equivalent changes and modifications made according to the content of the scope of patent protection of the present invention application should be included in the scope of the present invention patent application.

Claims

1. A medium voltage cable testing mechanism, characterized in that: The test box (1) comprises a test box (1), the test box (1) is a cubic structure, and two vertical and horizontal partitions (2) are installed in the test box (1) to divide the space inside the test box (1) into a nine-square grid structure; the middle area in the test box (1) is set as the middle area (3), the areas at the four corners of the test box (1) are separated areas (4), the middle area at the upper end of the test box (1) is a cold test area (5), the middle area at the lower end of the test box (1) is a hot test area (6), and the areas on both sides of the middle of the test box (1) are performance test areas (7); The partitions (2) on the four sides of the middle area (3) are provided with openings (8), and are connected to the four surrounding areas through the openings (8) in four directions. The partition areas (4) are respectively provided with transverse movement mechanisms (9), and the main shafts of the transverse movement mechanisms (9) are respectively provided with gate plates (10). The main shafts of each transverse movement mechanism (9) extend into the adjacent test area on the right side, and the gate plates (10) on the main shafts block the openings (8). The cold test area (5) is correspondingly installed with a refrigeration device (11), and the cold test area (5) is cooled by the refrigeration device (11); the hot test area (6) is correspondingly installed with a heating device (12), and the hot test area (6) is heated by the heating device (12); the middle area (3) is correspondingly provided with a medium voltage cable (13) to be tested, and the middle area (3) is also correspondingly installed with a temperature measuring element (14); Pressure mechanisms (15) are installed in the performance test areas (7) on both sides of the test box (1), and the positions of the pressure mechanisms (15) on both sides correspond to the positions of the openings (8) on both sides of the middle area (3). Pressure plates (16) are installed on the main axes of the pressure mechanisms (15) on both sides, and the pressure plates (16) on both sides can enter the middle area (3) from the openings (8) to apply pressure to the medium voltage cable (13) in the middle area (3) from both sides. A mounting seat (17) is also provided on the main shaft of the pressure mechanism (15) on both sides, a rotating motor (18) is also provided on the mounting seat (17), and the pressure plate (16) is correspondingly mounted on the main shaft of the rotating motor (18); The upper and lower ends of the pressure plate (16) are both provided with spring grooves (19), a spring member (20) is correspondingly installed in the spring groove (19), and a top block (21) is correspondingly installed in the spring groove (19), and the spring member (20) is correspondingly fixed on the top block (21); the top blocks (21) at the upper and lower ends of the pressure plates (16) on both sides correspond to each other, when the pressure plates (16) on both sides squeeze the medium voltage cable (13) in the middle area (3), the top blocks (21) on both sides press against each other and retract into the spring groove (19) under the action of pressure, thereby achieving compression of the medium voltage cable (13); After the rotating motor (18) is started, the pressing plates (16) on both sides are driven to rotate simultaneously, and under the blocking restriction of the upper and lower top blocks (21), the middle medium-voltage cable (13) is rotated and bent accordingly; The end of the top block (21) is also provided with a sawtooth-shaped clamping groove (22) and a clamping block (23) at corresponding positions. When the top blocks (21) on both sides are pressed together, the clamping groove (22) and the clamping block (23) are fitted together.

2. A medium voltage cable testing mechanism according to claim 1, characterized in that: Door panels (24) that can be opened are correspondingly installed on both sides of the middle area (3) in the middle of the test box (1) via hinged components; the door panels (24) are provided with inner holes (25) for the medium-voltage cable (13) to pass through; the medium-voltage cable (13) passes between the door panels (24) on both sides and is then suspended at a middle position of the middle area (3).

3. A medium voltage cable testing mechanism according to claim 2, characterized in that: Flow stirring devices (26) are also installed on the door panels (24) on both sides. The flow stirring devices (26) on both sides can stir the space in the middle area (3) to make the temperature in the middle area (3) uniform.

4. A medium voltage cable testing mechanism according to claim 2, characterized in that: A total of four temperature measuring elements (14) are provided in the middle area (3), and the installation positions of the temperature measuring elements (14) do not conflict with the positions of the openings (8).

5. A medium voltage cable testing mechanism according to claim 2, characterized in that: Cable entry roller groups (27) are correspondingly installed on the outside of both ends of the middle area (3), and the medium-voltage cable to be tested is clamped by the cable entry roller groups (27) on both sides and enters the middle area (3).

6. A medium voltage cable testing mechanism according to claim 2, characterized in that: The side walls of the cold test area (5) and the hot test area (6) are respectively provided with interlayers.

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