A high-voltage line obstacle light

Abstract

The present invention discloses a high-voltage line obstruction light, comprising a high-voltage line clamp, a mounting bracket, an LED light, and a current mutual induction power module. One end of the high-voltage line clamp is connected to the mounting bracket, and the other end is connected to the high-voltage cable. The LED light is fixedly mounted at the bottom of the mounting bracket, a lampshade is provided on the outside of the LED light, and the current mutual induction power module is mounted inside the mounting bracket and connected to the LED light. The present invention does not require the use of other auxiliary tools for installation and is easy to disassemble. The clamp does not damage the high-voltage line itself during clamping, making it easy to use. The obstruction light of the present invention operates reliably and can emit light even at night, providing a good warning effect.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage power transmission and distribution, and in particular to a high-voltage line obstacle light. Background Art

[0002] Existing high-voltage line warnings primarily use obstruction balls, typically 600mm in diameter. These are bulky and subject to high wind resistance. They don't emit light at night, relying primarily on reflection to provide a warning during the day. In power systems, existing CT power supply devices are primarily used for power transmission and distribution monitoring and fault indication, which require low-power power. However, there are no obstruction lights for overhead or high-voltage power lines in power systems. In particular, the existing technology for obstruction lights that draw power from high-voltage or ultra-high-voltage lines with voltages exceeding 35kV remains a blank. Furthermore, existing technologies require additional tools to install warning devices on high-voltage lines, and the installation process can easily damage the surface of the high-voltage line, making installation time-consuming and labor-intensive, and inconvenient. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-voltage line obstruction light that can effectively solve the problems of poor warning effect and inconvenient installation of existing high-voltage line obstruction lights.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A high-voltage line obstruction light includes a high-voltage line clamp, a mounting bracket, an LED lamp, and a current mutual induction power supply module; one end of the high-voltage line clamp is connected to the mounting bracket, and the other end is connected to the high-voltage cable; the LED lamp is fixedly arranged at the lower part of the mounting bracket, a lampshade is provided outside the LED lamp, and the current mutual induction power supply module is installed inside the mounting bracket and connected to the LED lamp.

[0006] Furthermore, the high-voltage wire clamp includes a first upper wire clamp, a first lower wire clamp, and a first clamping plate, the first clamping plate is provided with a first open groove, the first lower wire clamp is provided at the lower part of the first open groove, the first clamping plate is threadedly connected to a first handle, the first handle is provided with a thread, the first upper wire clamp is fixedly connected to the bottom of the first handle, the first upper wire clamp and the first lower wire clamp are arranged opposite to each other, the first clamping plate is provided with a first bolt mounting hole, the mounting bracket is provided with a first wire clamp support frame, and the first wire clamp support frame is connected to the first clamping plate through a mounting bolt.

[0007] Furthermore, the first clamping plate includes a main body plate and a main body bracket, the first handle is threadedly connected to the main body bracket, the main body plate is provided with a first bolt mounting hole, the first wire clamp support frame is connected to the main body plate through a mounting bolt, one side of the main body plate is rotatably connected to one side of the main body bracket through a rotating shaft, the main bracket and the other side of the main plate are provided with a movable buckle structure, the movable buckle structure includes a fixed buckle and a movable buckle, the fixed buckle is provided on the main body plate, the movable buckle is rotatably provided on the main body bracket through a buckle rotating shaft, and the connection between the fixed buckle and the movable buckle is provided as a slope structure.

[0008] Furthermore, the first upper wire clamp and the first lower wire clamp are configured as arc-shaped structures, a silicone layer is provided on the first upper wire clamp and the first lower wire clamp, a spring pad is provided at the connection between the first handle and the main body bracket, and a non-slip handle is provided on the first handle, and the non-slip handle is connected to the first handle through a threaded hole.

[0009] Furthermore, a second wire clamp support frame is connected to the mounting bracket, and the high-voltage wire clamp includes a second upper wire clamp, a second lower wire clamp, and a second clamping plate. The second clamping plate and the first clamping plate are symmetrically connected to the second wire clamp support frame through the center line of the mounting bracket, and the second upper wire clamp, the second lower wire clamp, and the second clamping plate are synchronously arranged with the first upper wire clamp, the first lower wire clamp, and the first clamping plate.

[0010] Furthermore, the current mutual inductance power supply module includes an induction coil, a rectifier filter circuit, an NMOS tube, an isolation diode, a voltage sampling circuit, and a pulse width modulation controller; the induction coil is connected to the current transformer, the first input end of the rectifier filter circuit is electrically connected to the current output end of the induction coil, the first output end of the rectifier filter circuit is electrically connected to the current input end of the induction coil, the drain of the NMOS tube is electrically connected to the positive output end of the rectifier filter circuit, the source of the NMOS tube is electrically connected to the negative input end of the rectifier filter circuit, the input end of the isolation diode is electrically connected to the positive output end of the rectifier filter circuit and the drain of the NMOS tube respectively, the input end of the voltage sampling circuit is electrically connected to the output end of the isolation diode, the first output end of the voltage sampling circuit is electrically connected to the negative input end of the rectifier filter circuit, the input end of the pulse width modulation controller is electrically connected to the second output end of the voltage sampling circuit, and the output end of the pulse width modulation controller is electrically connected to the gate of the NMOS tube.

[0011] Furthermore, the current mutual inductance power supply module is connected to a load circuit, which includes a capacitor and a third resistor. The first end of the capacitor is connected to the output end of the isolation diode, and the second end of the capacitor is electrically connected to the negative input end of the rectifier and filter circuit and the source of the NMOS tube respectively. The first end of the third resistor is electrically connected to the output end of the isolation diode and the first end of the capacitor respectively, and the second end of the third resistor is electrically connected to the negative input end of the rectifier and filter circuit, the source of the NMOS tube and the second end of the capacitor respectively. The pulse width modulation controller is a metal oxide semiconductor field effect transistor controlled by pulse width modulation.

[0012] Furthermore, an ambient illumination detection control circuit is provided between the LED lamp and the current mutual inductance power taking module. The ambient illumination detection control circuit includes an ambient illumination detector and a control device. The ambient illumination detector is provided on the housing of the mounting bracket.

[0013] Furthermore, an anti-corona structure is provided in the mounting bracket, a reflective cup is provided on the LED lamp, a protective ring is provided at the bottom of the mounting bracket, and the protective ring is provided on the outside of the lampshade.

[0014] Furthermore, a connecting platform is provided on the mounting bracket, and the connecting platform is movably connected to a connecting plate via a rotating shaft. A groove is provided between the connecting platform and the connecting plate, and the connecting plate is connected to the other end of the connecting platform via a movable buckle.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Compared with the existing warning devices, the present invention can realize high-voltage or ultra-high-voltage current power supply of more than 35kV. The present invention can be installed on high-voltage or ultra-high-voltage transmission lines to realize current mutual induction power supply of high-voltage or ultra-high-voltage lines to power LED lights. At the same time, the high-voltage line clamp provided in the present invention can reliably install the obstacle light on the high-voltage line without the aid of other auxiliary tools for installation, and is convenient to disassemble. The clamp will not damage the high-voltage line itself during the process of clamping the high-voltage line, and is convenient to use. The obstacle light of the present invention is reliable in operation, can also emit light at night, and has a good warning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the current mutual inductance power supply module structure connection in the present invention.

[0020] In the figure: 1-busbar, 2-induction coil, 3-rectifier filter circuit, 4-NMOS tube, 5-isolation diode, 6-pulse width modulation controller, 7-voltage sampling circuit, 8-load circuit, 102-first handle, 103-first upper wire clamp, 104-first lower wire clamp, 105-first wire clamp support frame, 106-lamp cover, 107-protection ring, 108-reflective cup, 109-LED lamp, 110-second lower wire clamp, 111-current mutual induction power supply module, 112-second upper wire clamp, 114-connecting plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Example 1

[0023] A high-voltage line obstruction light, comprising a high-voltage line fixture, a mounting bracket 115, an LED lamp 109, and a current mutual induction power module 111; one end of the high-voltage line fixture is connected to the mounting bracket 115, and the other end is connected to the high-voltage cable. The mounting bracket 115 is fixed to the high-voltage cable through the high-voltage line fixture. The LED lamp 109 is fixedly arranged at the lower part of the mounting bracket 115. A lampshade 106 is provided outside the LED lamp 109. The lampshade 106 can protect the LED lamp 109. The current mutual induction power module 111 includes an open-close current sensor, which is arranged on the mounting bracket 115. 15 is on the upper part and is connected to the current mutual induction power taking module 111 circuit. The current mutual induction power taking module 111 circuit is installed inside the mounting bracket 115 and is connected to the LED lamp 109. The LED lamp 109 is powered by the current mutual induction power taking module 111. During installation, the high-voltage cable can be passed through the open-close current sensor. The open-close current sensor senses and takes power. The high-voltage line clamp is supported by force. The power supply of the LED lamp 109 is not affected by time and weather, and can also emit light normally at night. The warning effect is good. During installation, it can be directly installed on the high-voltage cable through the high-voltage line clamp, which is easy to operate and quick to install.

[0024] Example 2

[0025] On the basis of Example 1, the high-voltage line clamp includes a first upper wire clamp 103, a first lower wire clamp 104, and a first clamping plate. The first clamping plate is provided with a first opening groove, and the first clamping plate can be set to a C-shaped structure. The size of the first opening groove is set according to the diameter of the high-voltage cable so that the opening groove can pass through the high-voltage cable. The first lower wire clamp 104 is set at the lower part of the first opening groove, and a threaded hole is provided at the upper part of the first clamping plate. The first clamping plate is threadedly connected to the first handle 102, and the first handle 102 is provided with a thread. The first upper wire clamp 103 is fixedly connected to the bottom of the first handle 102. By rotating the first handle 102, the first upper wire clamp 103 can be moved up and down. The first upper wire clamp 103 and the first lower wire clamp 104 are arranged opposite to each other, and a first bolt mounting hole is provided on the first clamp plate, and a first wire clamp support frame 105 is provided on the mounting bracket 115. The first wire clamp support frame 105 is connected to the first clamp plate by mounting bolts, and is set as a wire clamp structure. The wire clamp can be adjusted according to the diameter of the high-voltage cable, so that the wire clamp is compactly connected to the high-voltage cable. During installation, the high-voltage cable is passed through the first open slot and the cable is stabilized between the first upper wire clamp 103 and the first lower wire clamp 104. Then, the first handle 102 is rotated so that the first upper wire clamp 103 and the first lower wire clamp 104 clamp the high-voltage cable. This embodiment is easy to install and does not require auxiliary tools.

[0026] Example 3

[0027] On the basis of Examples 1-2, the first clamping plate includes a main body plate and a main body bracket, and the first clamping plate is set to a movable structure, which can adapt to high-voltage cables of various sizes. The first handle 102 is threadedly connected to the main body bracket, and a first bolt mounting hole is provided on the main body plate. The first wire clamp support frame 105 is connected to the main body plate through a mounting bolt, and one side of the main body plate is rotatably connected to one side of the main body bracket through a rotating shaft. The main bracket and the other side of the main plate are provided with a movable snap structure, and the movable snap structure includes a fixed buckle and a movable buckle. The fixed buckle is set on the main body plate, and the movable buckle is rotatably set on the main body bracket through a snap shaft. The connection between the fixed buckle and the movable buckle is set to a slope structure, and the installation stability of the clamp can be increased by the movable snap buckle.

[0028] Example 4

[0029] On the basis of Examples 1-3, the first upper wire clamp 103 and the first lower wire clamp 104 are set to an arc structure, which can fit the curvature of the high-voltage cable to avoid clamping the high-voltage cable. The first upper wire clamp 103 and the first lower wire clamp 104 are provided with a silicone layer to further protect the high-voltage cable. The first upper wire clamp 103 and the first lower wire clamp 104 can also be set to a flexible material. A spring pad is provided at the connection between the first handle 102 and the main body bracket, and a non-slip handle is provided on the first handle 102. The non-slip handle is connected to the first handle 102 through a threaded hole. After rotating the first handle 102 to clamp the high-voltage cable, rotate the non-slip handle to press the spring pad, thereby preventing the first handle 102 from loosening, thereby increasing the installation firmness and stability of the wire clamp.

[0030] Example 5

[0031] On the basis of Examples 1-4, a second wire clamp support frame is connected to the mounting bracket 115, and the high-voltage wire clamp includes a second upper wire clamp 112, a second lower wire clamp 110, and a second clamping plate. The second clamping plate and the first clamping plate are symmetrically connected to the second wire clamp support frame through the center line of the mounting bracket 115. The second upper wire clamp 112, the second lower wire clamp 110, the second clamping plate and the first upper wire clamp 103, the first lower wire clamp 104, and the first clamping plate are arranged synchronously. Two high-voltage cable clamps are symmetrically arranged on both sides of the mounting bracket 115. The two cable clamps are arranged synchronously, which can improve the load-bearing capacity of the wire clamp and increase the stability and firmness of the wire clamp.

[0032] Example 6

[0033] On the basis of Examples 1-5, the current mutual inductance power supply module 111 includes an induction coil 2, a rectifier filter circuit 3, an NMOS tube 4, an isolation diode 5, a voltage sampling circuit 7, and a pulse width modulation controller 6; the induction coil 2 is connected to the current transformer, the first input end of the rectifier filter circuit 3 is electrically connected to the current output end of the induction coil 2, the first output end of the rectifier filter circuit 3 is electrically connected to the current input end of the induction coil 2, the drain of the NMOS tube 4 is electrically connected to the positive output end of the rectifier filter circuit 3, the source of the NMOS tube 2 is electrically connected to the negative input end of the rectifier filter circuit 3, the input end of the isolation diode 5 is electrically connected to the positive output end of the rectifier filter circuit 3 and the drain of the NMOS tube 4, respectively, the input end of the voltage sampling circuit 7 is electrically connected to the output end of the isolation diode 5, the first output end of the voltage sampling circuit 7 is electrically connected to the negative input end of the rectifier filter circuit 3, and the The input end of the pulse width modulation controller 6 is electrically connected to the second output end of the voltage sampling circuit 7, and the output end of the pulse width modulation controller 6 is electrically connected to the gate of the NMOS tube 4. The current mutual induction power supply module 111 set up in this way can meet the inductive power supply requirements of a high-voltage line with a voltage of 35KV, and can be installed on a high-voltage or ultra-high-voltage transmission line to realize the current mutual induction power supply of the high-voltage or ultra-high-voltage line to power the LED lamp. The high-frequency pulse width modulation controller 6 is used to sample the output voltage and perform closed-loop control to ensure the stability of the output voltage; when the current of the bus 1 is large, the pulse width modulation becomes wider, the conduction time of the metal oxide semiconductor field effect transistor becomes longer, and the excess energy returns to the power supply bus 1. A high-power resistor is no longer required as a discharge resistor for the excess energy, breaking through the constraints of the high-power current sensor power supply requirements, so that the device can meet the current sensor power supply requirements of the bus 1 with extremely large power and a wide range of current in a very small volume. This embodiment can be applied to a variety of high-voltage cables with high voltage.

[0034] Example 7

[0035] On the basis of Examples 1-6, the current mutual inductance power taking module 111 is connected to a load circuit 8, which includes a capacitor and a third resistor. The first end of the capacitor is connected to the output end of the isolation diode, and the second end of the capacitor is electrically connected to the negative input end of the rectifier and filter circuit 3 and the source of the NMOS tube 4, respectively. The first end of the third resistor is electrically connected to the output end of the isolation diode and the first end of the capacitor, respectively. The second end of the third resistor is electrically connected to the negative input end of the rectifier and filter circuit 3, the source of the NMOS tube 4 and the second end of the capacitor, respectively. The pulse width modulation controller 6 is a metal oxide semiconductor field effect transistor controlled by pulse width modulation. The set load circuit 8 can control the stability of the current and voltage of the entire circuit and improve reliability.

[0036] Example 8

[0037] On the basis of Examples 1-7, an ambient illumination detection control circuit is arranged between the LED lamp 109 and the current mutual inductance power supply module 111. The ambient illumination detection control circuit includes an ambient illumination detector and a control device. The ambient illumination detector is arranged on the outer shell of the mounting bracket 115. When the ambient illumination detector detects that the ambient brightness is high during the day, the control circuit disconnects the power supply of the LED lamp 109 to save electricity. At night, the LED lamp 109 is powered to issue a warning.

[0038] Example 9

[0039] On the basis of Examples 1-8, an anti-corona structure is provided under the mounting bracket 115, and the anti-corona structure is provided at the bottom of the mounting bracket 115 and outside the lampshade 106. A reflective cup 108 is provided on the LED lamp 109, and a protective ring 107 is provided at the bottom of the mounting bracket 115, and the protective ring 107 is provided on the outside of the lampshade 106. The anti-corona structure can also be provided on the protective ring 107. This structure can effectively protect the LED lamp 109 so that it can emit light normally.

[0040] Example 10

[0041] On the basis of Examples 1-9, a connecting platform is provided on the mounting bracket 115, and the connecting platform is movably connected to a connecting plate 114 via a rotating shaft. A groove is provided between the connecting platform and the connecting plate 114, and the connecting plate 114 is connected to the other end of the connecting platform via a movable snap. When an open-and-close current sensor is used, the open-and-close current sensor is set inside the connecting platform and the connecting plate 114. During installation, the connecting plate 114 is opened, and the high-voltage cable is passed between the connecting platform and the connecting plate 114, that is, the cable is passed through the open-and-close current sensor, which can protect the open-and-close current sensor from damage and can provide support for the induction lamp when the wire clamp fails.

[0042] In the above embodiments, the technologies not mentioned are prior art. The embodiments discussed in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment, which are included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0043] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A high-voltage line obstruction light, characterized by: The invention comprises a high-voltage line fixture, a mounting bracket (115), an LED lamp (109), and a current mutual induction power module (111); one end of the high-voltage line fixture is connected to the mounting bracket (115), and the other end is connected to the high-voltage cable; the LED lamp (109) is fixedly arranged at the lower part of the mounting bracket (115); a lampshade (106) is arranged outside the LED lamp (109); and the current mutual induction power module (111) is installed inside the mounting bracket (115) and connected to the LED lamp (109); The high-voltage wire clamp comprises a first upper wire clamp (103), a first lower wire clamp (104), and a first clamping plate, wherein the first clamping plate is provided with a first opening slot, the first lower wire clamp (104) is provided at the lower portion of the first opening slot, the first clamping plate is threadedly connected to a first handle (102), the first handle (102) is provided with a thread, the first upper wire clamp (103) is fixedly connected to the bottom of the first handle (102), the first upper wire clamp (103) and the first lower wire clamp (104) are arranged opposite to each other, the first clamping plate is provided with a first bolt mounting hole, the mounting bracket (115) is provided with a first wire clamp support frame (105), and the first wire clamp support frame (105) is connected to the first clamping plate via mounting bolts; The first clamping plate includes a main body plate and a main body bracket, the first handle (102) is threadedly connected to the main body bracket, the main body plate is provided with a first bolt mounting hole, the first wire clamp support frame (105) is connected to the main body plate via a mounting bolt, one side of the main body plate is rotatably connected to one side of the main body bracket via a rotating shaft, the main body bracket and the other side of the main body plate are provided with a movable buckle structure, the movable buckle structure includes a fixed buckle and a movable buckle, the fixed buckle is provided on the main body plate, the movable buckle is rotatably provided on the main body bracket via a buckle rotating shaft, and the connection between the fixed buckle and the movable buckle is provided with an inclined structure; The mounting bracket (115) is connected to a second wire clamp support frame, and the high-voltage wire clamp comprises a second upper wire clamp (112), a second lower wire clamp (110), and a second clamping plate. The second clamping plate and the first clamping plate are symmetrically connected to the second wire clamp support frame via a center line of the mounting bracket (115). The second upper wire clamp (112), the second lower wire clamp (110), and the second clamping plate are synchronously arranged with the first upper wire clamp (103), the first lower wire clamp (104), and the first clamping plate.

2. A high-voltage line obstruction light according to claim 1, characterized in that: The first upper wire clamp (103) and the first lower wire clamp (104) are configured as arc structures, a silicone layer is provided on the first upper wire clamp (103) and the first lower wire clamp (104), a spring pad is provided at the connection between the first handle (102) and the main body bracket, and a non-slip handle is provided on the first handle (102), and the non-slip handle is connected to the first handle (102) through a threaded hole.

3. The high-voltage line obstruction light according to claim 1, characterized in that: The current mutual inductance power supply module (111) comprises an induction coil (2), a rectifier filter circuit (3), an NMOS tube (4), an isolation diode (5), a voltage sampling circuit (7), and a pulse width modulation controller (6); the induction coil (2) is connected to the current mutual inductor, the first input end of the rectifier filter circuit (3) is electrically connected to the current output end of the induction coil (2), the first output end of the rectifier filter circuit (3) is electrically connected to the current input end of the induction coil (2), the drain of the NMOS tube (4) is electrically connected to the positive output end of the rectifier filter circuit (3), the source of the NMOS tube (2) is electrically connected to the positive output end of the rectifier filter circuit (3), and the voltage sampling circuit (7) is electrically connected to the positive output end of the rectifier filter circuit (3). The negative input terminal of the rectifier filter circuit (3) is electrically connected, the input terminal of the isolation diode (5) is electrically connected to the positive output terminal of the rectifier filter circuit (3) and the drain of the NMOS tube (4) respectively, the input terminal of the voltage sampling circuit (7) is electrically connected to the output terminal of the isolation diode (5), the first output terminal of the voltage sampling circuit (7) is electrically connected to the negative input terminal of the rectifier filter circuit (3), the input terminal of the pulse width modulation controller (6) is electrically connected to the second output terminal of the voltage sampling circuit (7), and the output terminal of the pulse width modulation controller (6) is electrically connected to the gate of the NMOS tube (4).

4. A high-voltage line obstruction light according to claim 3, characterized in that: The current mutual inductance power taking module (111) is connected to a load circuit (8), and the load circuit (8) includes a capacitor and a third resistor. The first end of the capacitor is connected to the output end of the isolation diode, and the second end of the capacitor is electrically connected to the negative input end of the rectifier filter circuit (3) and the source of the NMOS tube (4). The first end of the third resistor is electrically connected to the output end of the isolation diode and the first end of the capacitor, and the second end of the third resistor is electrically connected to the negative input end of the rectifier filter circuit (3), the source of the NMOS tube (4), and the second end of the capacitor. The pulse width modulation controller (6) is a metal oxide semiconductor field effect transistor controlled by pulse width modulation.

5. The high-voltage line obstruction light according to claim 1, characterized in that: An ambient illumination detection control circuit is provided between the LED lamp (109) and the current mutual induction power taking module (111), the ambient illumination detection control circuit comprising an ambient illumination detector and a control device, and the ambient illumination detector is provided on the housing of the mounting bracket (115).

6. The high-voltage line obstruction light according to claim 1, characterized in that: An anti-corona structure is provided below the mounting bracket (115), a reflective cup (108) is provided on the LED lamp (109), a protective ring (107) is provided at the bottom of the mounting bracket (115), and the protective ring (107) is provided outside the lampshade (106).

7. The high-voltage line obstruction light according to claim 1, characterized in that: A connecting platform is provided on the mounting bracket (115), and the connecting platform is movably connected to a connecting plate (114) via a rotating shaft. A groove is provided between the connecting platform and the connecting plate (114), and the connecting plate (114) is connected to the other end of the connecting platform via a movable buckle.

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