High-voltage cable environment resistance test device

Abstract

The utility model relates to a high-voltage cable environment resistance test device comprising an environment test box, the inner side wall of the environment test box is provided with a chute, the chute is movably provided with a fixing frame, the two sides of the fixing frame are provided with sealing plates, the side walls of the sealing plates are provided with installing holes in a penetrating manner, each installing hole is provided with a connecting terminal, and the connecting terminal is connected with the fixing frame. A cable is arranged between every two oppositely arranged connecting terminals, a wiring board is further arranged on the groove bottom face of the sliding groove, and the connecting terminals penetrate through the sealing plate and are electrically connected with the wiring board. According to the invention, the cable and the fixing frame are assembled in advance, so that the end part of the cable can be automatically butted with the wiring board only by pushing the fixing frame in the subsequent installation process, so that a worker can carry out a contrast experiment, and meanwhile, the cable can be disassembled without being in direct contact with the cable after detection is finished, so that the installation process is simplified, and the working efficiency is improved. And the security of the application is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable resistance test technical field, concretely relates to a high voltage cable environmental test device. BACKGROUND

[0002] High voltage cable is a kind of power cable, is used to transmit 1kv-1000kv between power cable, is applied to power transmission and distribution. In actual use process, since high voltage cable is exposed to the outside for many years, it is therefore susceptible to the influence of external environment, and the transmission of its power is affected, so that in order to ensure that the cable can be used normally in various extreme environments, it needs to be simulated and detected.

[0003] The existing detection device is simple in structure, generally only one cable can be installed at a time, not only lacks comparative experimental data, but also needs artificial auxiliary operation in the dismounting process, especially the surface temperature of the cable is high after high-temperature detection, and even some cables spark, so it is easy to scald in the dismounting process. UTILITY MODEL CONTENTS

[0004] Based on the above description, the utility model provides a high voltage cable environmental test device to solve the shortcomings that the existing detection device can only install one cable at a time, lacks test comparison data, and needs artificial auxiliary operation in the dismounting process, which is dangerous.

[0005] The utility model is realized through the following technical schemes:

[0006] A kind of high voltage cable environmental test device, including environmental test box, the inner side wall of the environmental test box is equipped with sliding slot, the fixed frame is movably installed on the sliding slot, and the both sides of the fixed frame are equipped with sealing plate, the side wall of the sealing plate is equipped with installation hole, each installation hole is equipped with a connecting terminal, one cable is arranged between each two opposite connecting terminals, the groove bottom surface of the sliding slot is also equipped with terminal block, and the connecting terminal passes through sealing plate and is electrically connected with terminal block.

[0007] Based on the above technical scheme, the utility model can also be improved as follows.

[0008] Further, the front of the environmental test box is provided with an opening, and the opening is provided with a box door on one side, and the outer wall of the box door and the inner wall of the opening are provided with a matching annular groove structure.

[0009] Further, the center of the box door is also provided with a transparent window, and one side of the environmental test box is also provided with a control panel, and the control panel is electrically connected with the two terminal blocks respectively.

[0010] Furthermore, the environmental testing chamber has an air inlet pipe on its inner top surface and an exhaust pipe on its inner bottom surface. The top of the air inlet pipe also has two branch pipes, which extend around the outside of the internal space of the environmental testing chamber to the bottom of the exhaust pipe and are interconnected.

[0011] Furthermore, filters are provided at the connection points between the air inlet pipe and the air outlet pipe and the interior of the environmental testing chamber, and an exhaust fan is also provided on the air outlet pipe.

[0012] Furthermore, one of the branch pipes is equipped with an electric heater, the other branch pipe is equipped with a cooler, and both branch pipes are equipped with solenoid valves. The surface of the environmental test chamber is also equipped with a temperature sensor, and the metal probe of the temperature sensor is located inside the environmental test chamber.

[0013] Furthermore, the fixing frame is a metal frame composed of multiple horizontal and vertical metal rods, and the inner wall of the horizontally arranged metal rods is provided with slots, and the four corners of the sealing plate are respectively engaged in the slots.

[0014] Furthermore, a lead screw is arranged laterally inside the slot, and the outer wall of the lead screw is provided with threads, and the threads are provided with a positive thread section and a negative thread section and extend towards both ends of the lead screw, and threaded holes are provided through the end faces of the two sealing plates and are threadedly assembled with the lead screw.

[0015] Furthermore, a worm gear is rotatably mounted inside a metal rod arranged longitudinally in the middle of the fixed frame. A worm wheel is provided at the center of the lead rod, and the worm wheel is connected to the worm gear in a transmission manner. One end of the worm gear extends to the outer wall of the fixed frame and is provided with an adjusting cap. A silicone rubber pad is wrapped on the outer wall of the adjusting cap.

[0016] Furthermore, an annular sealing groove is arranged around the mounting hole, and a plug plate is protruding from the periphery of each interface on the terminal block. The plug plate is inserted into the annular sealing groove, and an elastic pad is provided on the inner wall of the annular sealing groove. The surface of the elastic pad is wavy, and the surface of the plug plate and the elastic pad are pressed against each other to form several sealing spaces.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the environmental test chamber in this embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of the fixing frame and the slide in this embodiment;

[0020] Figure 3This is a schematic diagram of the structure of the fixing frame and sealing plate in this embodiment;

[0021] Figure 4 This is a schematic diagram of the sealing plate and the terminal block in this embodiment;

[0022] Figure 5 This is a schematic diagram of the transmission structure of the lead screw and worm gear in this embodiment;

[0023] Figure 6 This is a schematic diagram of the internal air duct structure of the environmental test chamber in this embodiment;

[0024] The components include: 1. Environmental testing chamber; 11. Slide rail; 12. Air inlet duct; 13. Exhaust duct; 14. Exhaust fan; 15. Solenoid valve; 16. Electric heater; 17. Refrigerator; 18. Terminal block; 19. Plug-in board; 2. Fixing bracket; 21. Sealing plate; 22. Mounting hole; 23. Annular sealing groove; 24. Slot; 25. Lead screw; 26. Worm gear; 27. Worm wheel; 28. Adjusting cap; 3. Control panel; 4. Chamber door. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] Combination Figures 1-6 As shown, a high-voltage cable environmental resistance testing device includes:

[0028] Environmental test chamber 1 is an existing constant temperature test chamber, such as LK-408 high and low temperature humidity test chamber. It has an opening on the front and a door 4 at the opening. A transparent window is provided in the center of the door 4. At the same time, a matching groove structure is provided on the side of the door 4 that contacts the opening to ensure that the inside of the chamber is sealed.

[0029] The fixing frame 2 is a metal frame composed of several horizontal and vertical metal rods, with sealing plates 21 on both sides, and mounting holes 22 are provided through the end face of the sealing plates 21.

[0030] The cable has connecting terminals at both ends, which are snapped into the mounting holes 22 to straighten the entire cable horizontally. The connecting terminals at both ends are connected to the internal circuit of the environmental test chamber 1 for environmental testing when powered on.

[0031] Specifically, in this embodiment, a sliding groove 11 is provided on the inner side wall of the environmental test chamber 1, and a wiring board 18 is provided in the middle of the sliding groove 11. The wiring board 18 is provided with multiple interfaces, which are connected to the connection terminals one by one, so as to connect the cable to the internal circuit of the environmental test chamber 1.

[0032] A control panel 3 (which can be an LT-215AD touchscreen control panel) is also provided on the surface of the environmental test chamber 1. This control panel 3 is used to control the on / off state of the internal circuit and the magnitude of the input voltage. Therefore, voltage sensors and current sensors should be installed at the input and output ends, i.e., at the ends of the two terminal blocks 18, respectively, to detect the current loss during transmission under extreme conditions and to detect the stability of the voltage. The detection information is then transmitted to the control panel 3 for display on its screen, making it easier for staff to understand the specific data being tested more intuitively.

[0033] An air inlet pipe 12 is provided on the inner top surface of the environmental test chamber 1, and an exhaust pipe 13 is provided on the inner bottom surface. Two branch pipes are provided at the top of the air inlet pipe 12. Both branch pipes extend along the periphery of the test space to the bottom of the exhaust pipe 13 and are connected to form a circulating air duct. An exhaust fan 14 is also provided on the exhaust pipe 13 to accelerate the air circulation speed. An electric heater 16 and a cooler 17 are also provided on the outer walls of the two branch pipes. A solenoid valve 15 (which can be an Auman GTL solenoid valve 15) is also provided on the branch pipe to control the opening and closing of the pipes.

[0034] During high-temperature or low-temperature testing, the above structure only requires closing one of the pipes to heat the air inside the pipe using a heater or to cool the air inside the pipe using a cooler 17, thereby creating a high-temperature or low-temperature environment. In addition, the exhaust method allows the heated or cooled air to cover every corner of the test environment, avoiding uneven heating caused by some cables being too close to the air inlet 12. Furthermore, to prevent dust from entering the pipes, filters can be added to the inlets of the air inlet 12 and the exhaust 13.

[0035] The inner wall of the fixing frame 2 is also provided with slots 24, and a lead screw 25 is arranged horizontally inside one of the slots 24. The lead screw 25 extends from the center to both sides and is provided with a positive thread section and a negative thread section respectively. The four corners of the sealing plate 21 are respectively engaged in the four slots 24. At the same time, threaded holes are provided through its side wall. Therefore, the sealing plate 21 and the lead screw 25 are threaded together.

[0036] Meanwhile, the metal rod arranged longitudinally at the center of the fixing frame 2 is hollow inside. The hollow part is connected to the slot 24. A worm 26 is arranged longitudinally inside the hollow part. A worm wheel 27 is provided at the center of the lead screw 25. The worm 26 and the worm wheel 27 are engaged in transmission. One end of the worm 26 extends to the outer wall of the fixing frame 2 to form an adjusting cap 28. The adjusting cap is wrapped with a rubber pad made of silicone rubber.

[0037] During the testing process, it is also necessary to ensure the sealing between the connection terminals and the power strip to prevent the connection from being affected by the internal environment. In particular, under simulated rainy or humid weather conditions, internal moisture can easily enter the connection and cause a short circuit, affecting the test results.

[0038] Therefore, an annular sealing groove 23 should be arranged on the surface of the sealing plate 21, that is, around each mounting hole 22. An elastic pad is provided on the inner side wall of the annular sealing groove 23. The elastic pad is a rubber pad with a wavy surface. A plug plate 19 is provided around the socket of the plug board. The plug plate 19 is inserted directly into the annular sealing pad. By squeezing, several sealing spaces are formed between its side wall and the elastic pad, which effectively enhances the sealing effect.

[0039] In the above structure, the operator only needs to twist the adjusting cap 28 to make the two sealing plates 21 move relative to each other or in opposite directions. Moreover, this structure can be directly replaced by a high and low temperature resistant motor or a cylinder, so that the operator can disassemble all the cables without directly contacting the cables.

[0040] Compared to traditional installation methods, in this embodiment, the cables and mounting brackets 2 can be pre-assembled for preparation and replacement, which not only simplifies the installation process but also further enhances safety.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A high-voltage cable environmental resistance testing device, characterized in that, The device includes an environmental test chamber (1), on which a slide groove (11) is provided on the inner side wall. A fixed frame (2) is movably installed on the slide groove (11), and a sealing plate (21) is provided on both sides of the fixed frame (2). An installation hole (22) is provided through the side wall of the sealing plate (21). Each installation hole (22) is provided with a connection terminal. A cable is provided between each pair of oppositely arranged connection terminals. A terminal block (18) is also provided on the bottom surface of the slide groove (11). The connection terminal passes through the sealing plate (21) and is electrically connected to the terminal block (18).

2. The high-voltage cable environmental resistance testing device according to claim 1, characterized in that, The environmental test chamber (1) has an opening on the front, and a door (4) is provided on one side of the opening. A matching annular groove structure is provided between the outer wall of the door (4) and the inner wall of the opening.

3. The high-voltage cable environmental resistance testing device according to claim 2, characterized in that, The center of the door (4) is provided with a transparent window, and the side of the environmental test box (1) is provided with a control panel (3), which is electrically connected to two junction boxes (18).

4. The high-voltage cable environmental resistance testing device according to claim 3, characterized in that, The environmental test chamber (1) has an air inlet pipe (12) on its inner top surface and an exhaust pipe (13) on its inner bottom surface. The top of the air inlet pipe (12) also has two branch pipes. The two branch pipes extend around the interior space of the environmental test chamber (1) to the bottom of the exhaust pipe (13) and are connected to each other.

5. The high-voltage cable environmental resistance testing device according to claim 4, characterized in that, The air inlet pipe (12) and the exhaust pipe (13) are both equipped with filters at the internal connection points with the environmental test chamber (1), and the exhaust pipe (13) is also equipped with an exhaust fan (14).

6. The high-voltage cable environmental resistance testing device according to claim 5, characterized in that, One of the branch pipes is equipped with an electric heater (16), the other branch pipe is equipped with a cooler (17), and both branch pipes are equipped with solenoid valves (15). The surface of the environmental test chamber (1) is also equipped with a temperature sensor, and the metal probe of the temperature sensor is located inside the environmental test chamber (1).

7. The high-voltage cable environmental resistance testing device according to claim 1, characterized in that, The fixing frame (2) is a metal frame composed of multiple horizontal and vertical metal rods, and the inner wall of the horizontally arranged metal rods is provided with slots (24), and the four corners of the sealing plate (21) are respectively engaged in the slots (24).

8. The high-voltage cable environmental resistance testing device according to claim 7, characterized in that, The slot (24) has a lead screw (25) arranged laterally inside. The outer wall of the lead screw (25) is provided with threads, and the threads are provided with a positive thread section and a negative thread section and extend to both ends of the lead screw (25). The end faces of the two sealing plates (21) are provided with threaded holes and are threadedly assembled with the lead screw (25).

9. The high-voltage cable environmental resistance testing device according to claim 8, characterized in that, A metal rod arranged longitudinally in the middle of the fixed frame (2) is hollow inside and a worm gear (26) is rotatably installed. A worm wheel (27) is provided at the center of the lead screw (25). The worm wheel (27) is connected to the worm gear (26) in a transmission. One end of the worm gear (26) extends to the outer wall of the fixed frame (2) and is provided with an adjusting cap (28). The outer wall of the adjusting cap (28) is covered with a silicone rubber pad.

10. The high-voltage cable environmental resistance testing device according to claim 1, characterized in that, An annular sealing groove (23) is arranged around the mounting hole (22). Each interface on the terminal block (18) is provided with a protruding plug plate (19). The plug plate (19) is inserted into the annular sealing groove (23). An elastic pad is also provided on the inner wall of the annular sealing groove (23). The surface of the elastic pad is wavy. The surface of the plug plate (19) and the elastic pad are pressed against each other to form several sealing spaces.

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