A phase modulator test bed insulation fault prediction device

Abstract

The application provides a phase modifier test bench insulation fault prediction device, and belongs to the technical field of electric variable detection. The phase modifier test bench insulation fault prediction device comprises a shell; a refrigeration sheet is installed in a first cavity; a temperature sensor is installed in the first cavity; an equipment mounting plate is slidably arranged in the first cavity; a tooth groove is formed in the side of the equipment mounting plate and extends along the length direction of the equipment mounting plate; the driving shaft of a control motor is rotated to drive the gear to rotate, and then the rotating gear pushes the equipment mounting plate to slide, so that one end of the equipment mounting plate slides to the outside of the shell through the through groove formed at one end of the first cavity, and the equipment and electrical elements mounted on the equipment mounting plate are convenient to replace and maintain; and the cover plate arranged on the surface of the through groove is used for sealing the through groove to block dust from entering the first cavity.

Description

Technical Field

[0001] The present application relates to the field of electrical variable detection, and in particular to an insulation fault prediction device for a phase regulator test bench. Background Art

[0002] Currently, the primary loads in power systems are asynchronous motors and transformers. These devices draw significant amounts of reactive power from the grid for excitation. Consequently, the grid carries a significant portion of this inductive reactive current, which reduces the grid's power factor. This in turn limits the full performance of generators and transmission and distribution equipment, increases line and voltage losses, degrades power quality, and even impacts transmission stability. Because synchronous motors, when overexcited, can draw current from the grid that leads the voltage, improving the grid's power factor, in past production practices, in addition to employing a number of synchronous motors, synchronous condensers were also installed at the receiving end of the grid to improve the grid's power factor.

[0003] Phase regulators are generally installed in hub substations. The advantage of using phase regulators for reactive power compensation is that it is very convenient to adjust the reactive load. By changing the size of the excitation current, the reactive power can be adjusted smoothly and continuously. It can be adjusted in both directions and can absorb reactive power as well as emit reactive power. Phase regulators running at full load have a certain overload capacity. When the voltage drops sharply due to a fault in the power system, threatening the stability, the phase regulator can run overload for a short period of time, allowing the operating personnel to take corresponding measures during this period to avoid serious accidents such as voltage collapse. It is better than capacitors in maintaining the stability of the power system.

[0004] Currently, the commissioning and maintenance of condensers in UHV converter stations are still in the experience-building phase. Various failures are inevitable during operation. The main insulation system is one of the most critical components of a condenser. Over long-term operation, the main insulation of large condensers is subjected to a combination of electrical, thermal, and mechanical stresses. This gradually deteriorates its mechanical properties, dielectric properties, and electrical strength, known as aging, ultimately leading to insulation breakdown. Approximately 41% of motor or generator failures are caused by aging of the main insulation. The insulation condition of the stator windings largely determines the operational reliability of the condenser. Therefore, online monitoring of the condenser's insulation system can detect insulation defects early, determine the extent of insulation aging, and provide diagnostic and early warning of potential faults. This helps extend the service life of large condensers, prevent premature insulation failure, and minimize the safety threats to personnel and equipment.

[0005] The above-mentioned existing technical solutions have the following defects: since the detection equipment performs information fusion diagnosis of multiple sensors, and thus the equipment is integrated and centralized, the existing detection equipment is installed in a protective shell, which is not convenient for replacement and maintenance. During this process, the running equipment will generate a lot of heat, and untimely heat dissipation will cause high-temperature damage to the equipment. Summary of the Invention

[0006] In order to make up for the above shortcomings, this application provides an insulation fault prediction device for a phase shifter test bench, which aims to improve the problem that the detection equipment is installed in a protective shell, which is inconvenient to replace and maintain, the equipment will generate a lot of heat, and untimely heat dissipation will cause high-temperature damage to the equipment.

[0007] The embodiment of the present application provides a phase modulator test bench insulation fault prediction device, comprising a housing;

[0008] A partition is fixed in the shell, and the partition divides the shell into a first cavity and a second cavity. A refrigeration plate is installed in the first cavity, a temperature sensor is installed in the first cavity, and an equipment mounting plate is slidably arranged in the first cavity. A motor is fixedly installed in the shell, and the drive shaft of the motor is connected to a gear. A tooth groove is provided on the side of the equipment mounting plate, and the tooth groove is provided along the length direction of the equipment mounting plate; a through groove is provided at one end of the first cavity, and a cover plate is provided on the surface of the through groove.

[0009] In a preferred embodiment of the present invention, the motor is fixed in the second cavity, one end of the equipment mounting plate is arranged opposite to the through slot, one end of the cover plate is hinged to the outer surface of the shell, and a sealing gasket is provided at the connection between the inner surface of the cover plate and the through slot port.

[0010] In a preferred embodiment of the present invention, a rotating rod is rotatably installed in the second cavity, the gear is coaxially fixedly connected to the rotating rod, a worm wheel is coaxially fixed to the rotating rod, a worm is coaxially fixed to the driving shaft of the motor, and the worm is meshed with the worm wheel.

[0011] In a preferred embodiment of the present invention, a heat-insulating box is embedded in the top of the shell, the cooling fin is embedded in the bottom of the heat-insulating box, a heat dissipation hole is opened on the top of the heat-insulating box, the cooling fin is a semiconductor cooling fin, the cooling surface of the semiconductor cooling fin is arranged in the first cavity, and the heating surface of the semiconductor cooling fin is arranged in the heat-insulating box.

[0012] In a preferred embodiment of the present invention, the refrigeration fin is fixedly connected to a heat sink, the heat sink is arranged in the heat insulation box, the heat sink is in contact with the heating surface of the semiconductor refrigeration fin, and a heat dissipation fan is installed at the heat dissipation hole.

[0013] In a preferred embodiment of the present invention, a rotating shaft is fixed at one end of the cover plate, the rotating shaft is rotatably connected to the shell, the rotating shaft sleeve is provided with a torsion spring, the first fulcrum of the torsion spring is fixed to the shell, and the second fulcrum of the torsion spring is fixedly connected to the cover plate.

[0014] In a preferred embodiment of the present invention, a control panel is installed on the front of the housing, the cover is arranged on the back of the housing, and a display screen is embedded on the surface of the control panel.

[0015] In a preferred embodiment of the present invention, an air inlet is provided on the side wall of the second cavity, and an air exhaust is provided on the side wall of the first cavity. The air inlet and the air exhaust are respectively provided on the outer surface of the shell, and an exhaust port is provided on the surface of the partition. The surfaces of the exhaust port, the air inlet and the exhaust port are respectively provided with dustproof nets, and an exhaust fan is installed on the surface of the exhaust port.

[0016] In a preferred embodiment of the present invention, a one-way exhaust valve is installed in the exhaust port, a box body is installed in the first cavity, one end of the box body is connected to the exhaust port, a baffle is connected to the other port of the box body, a pressure sensor is installed in the box body, and the upper end of the baffle passes through the upper surface of the shell.

[0017] Beneficial effects: The present application provides an insulation fault prediction device for a phase shifter test bench. A partition fixed in the shell divides the shell into a first cavity and a second cavity. The installed temperature sensor monitors the temperature in the first cavity in real time. When the heat generated by the device installed on the device mounting plate is too high, the device is cooled and dissipated by a refrigeration plate to ensure that the device operates at an appropriate temperature. The cooling and heat dissipation by the refrigeration plate can effectively reduce the accumulation of dust on the surface of the device.

[0018] In actual use, since the side of the equipment mounting plate is provided with a tooth groove along the length direction of the equipment mounting plate, the gear is driven to rotate by controlling the rotation of the driving shaft of the motor, and then the rotating gear pushes the equipment mounting plate to slide, so that one end of the equipment mounting plate slides to the outside of the shell through the through groove opened at one end of the first cavity, which is convenient for replacing and maintaining the equipment and electrical components installed on the equipment mounting plate; the cover plate arranged on the surface of the through groove is used to seal the through groove to prevent dust from entering the first cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the insulation fault prediction device of the phase modulator test bench provided in the embodiment of the present application;

[0021] Figure 2 A schematic diagram of the three-dimensional structure of the housing provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the internal three-dimensional structure of a housing provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the motor and gear transmission provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a housing provided in an embodiment of the present application, cut away from the first perspective;

[0025] Figure 6 A schematic diagram of the structure of a housing cut away from a second viewing angle provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of a three-dimensional structure of a box body and a partition fixedly connected in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the three-dimensional structure of the air vent provided on the surface of the partition provided in an embodiment of the present application;

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of the cover provided in an embodiment of the present application.

[0029] In the figure: 100, shell; 101, first cavity; 103, second cavity; 105, through groove; 107, air inlet; 109, air exhaust; 110, partition; 111, air exhaust; 113, exhaust fan; 120, cover; 121, rotating shaft; 130, equipment mounting plate; 131, tooth groove; 140, control panel; 141, display; 150, motor; 151, gear; 153, rotating rod; 155, worm gear; 157, worm; 160, box body; 161, baffle; 163, pressure sensor; 170, thermal insulation box; 171, heat dissipation hole; 173, heat sink; 175, heat dissipation fan; 190, cooling fin. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the terms "bottom", "one end", "top", "center", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends" and the like to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation. At the same time, unless otherwise clearly specified or limited, the terms "snapping", "plugging", "welding", "installation", "setting", "interference fit", "screw connection", "pin connection" and the like should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal communication between two components or interaction between two components. Unless otherwise clearly defined, those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0038] See also Figures 1-9 The present invention provides an insulation fault prediction device for a phase modulator test bench, comprising a housing 100; an anti-slip foot pad is provided on the outer surface of the housing 100, and a signal connection interface is also embedded on the outer surface of the housing 100, and insulation fault prediction is performed through an external signal line;

[0039] A partition 110 is fixed in the shell 100, and the partition 110 divides the shell 100 into a first cavity 101 and a second cavity 103. A refrigeration plate 190 is installed in the first cavity 101. A temperature sensor is installed in the first cavity 101. An equipment mounting plate 130 is slidingly arranged in the first cavity 101. A motor 150 is fixedly installed in the shell 100, and the drive shaft of the motor 150 is connected to a gear 151. A tooth groove 131 is provided on the side of the equipment mounting plate 130, and the gear 151 is engaged with the tooth groove 131. The tooth groove 131 is provided along the length direction of the equipment mounting plate 130; a through groove 105 is provided at one end of the first cavity 101, and a cover plate 120 is provided on the surface of the through groove 105.

[0040] In a specific embodiment of the present invention, the motor 150 is fixed in the second cavity 103, one end of the equipment mounting plate 130 is arranged opposite to the through slot 105, one end of the cover plate 120 is hinged to the outer surface of the shell 100, and a sealing gasket is provided at the connection between the inner surface of the cover plate 120 and the port of the through slot 105.

[0041] See also Figure 2-Figure 3 In a specific embodiment of the present invention, in order to ensure the stable operation of the equipment mounting plate 130, a rotating rod 153 is rotatably installed in the second cavity 103, and the gear 151 is coaxially fixedly connected to the rotating rod 153. A worm gear 155 is coaxially fixed to the rotating rod 153, and a worm 157 is coaxially fixed to the driving shaft of the motor 150. The worm gear 157 is engaged with the worm gear 155, and the rotating rod 153 is driven to rotate by the driving shaft of the motor 150, thereby driving the gear 151 to rotate. The worm gear 155 is engaged with the worm gear 157, so that the transmission is unidirectional, so that the equipment mounting plate 130 is not displaced by external force. During the carrying process of the shell 100, it can be ensured that the equipment mounted on the surface of the equipment mounting plate 130 will not collide.

[0042] See also Figure 5-Figure 6 In a specific embodiment of the present invention, the cooling plate 190 is a device for absorbing heat to achieve the effect of lowering the ambient temperature. It can also be replaced by condenser cooling. In this application, the cooling plate 190 is preferably a semiconductor cooling plate. In order to prevent the heat generated by the heating surface of the semiconductor cooling plate from entering the second cavity 103, a thermal insulation box 170 is embedded in the top of the shell 100. The heating surface of the semiconductor cooling plate is arranged in the thermal insulation box 170, and the top plate of the thermal insulation box 170 coincides with the top of the shell 100, and a heat dissipation hole 171 is opened at the top of the thermal insulation box 170 to facilitate the heat generated by the heating surface of the semiconductor cooling plate to diffuse to the outside. The cooling plate 190 is embedded in the bottom of the thermal insulation box 170, and the cooling surface of the semiconductor cooling plate is arranged in the first cavity 101 to absorb the heat in the first cavity 101.

[0043] In a specific embodiment of the present invention, the refrigeration plate 190 is fixedly connected to the heat sink 173, the heat sink 173 is arranged in the heat insulation box 170, the heat sink 173 is in contact with the heating surface of the semiconductor refrigeration plate, and a heat dissipation fan 175 is installed at the heat dissipation hole 171. The heat diffusion is accelerated by adding the heat sink 173, and the heat discharge is accelerated by the installed heat dissipation fan 175, and the heat dissipation effect is accelerated by cooperating with each other.

[0044] In a specific embodiment of the present invention, a rotating shaft 121 is fixed at one end of the cover 120, and the rotating shaft 121 is rotatably connected to the shell 100. The rotating shaft 121 is sleeved with a torsion spring, the first fulcrum of the torsion spring is fixed to the shell 100, and the second fulcrum of the torsion spring is fixedly connected to the cover 120. The torsion spring cooperates with the rotating shaft 121, so that the cover 120 covers the surface of the through slot 105 to achieve sealing. When the equipment mounting plate 130 slides out of the through slot 105, one end of the equipment mounting plate 130 pushes the cover 120 to rotate around the rotating shaft 121, so that the rotation of the rotating shaft 121 pushes the torsion spring to produce elastic deformation. When the equipment mounting plate 130 shrinks and resets, the torsion spring pushes the rotating shaft 121 to rotate, so that the rotation of the rotating shaft 121 drives the cover 120 to reset and achieve sealing with the surface of the through slot 105.

[0045] In a specific embodiment of the present invention, a control panel 140 is installed on the front of the shell 100, the cover 120 is arranged on the back of the shell 100, and a display screen 141 is embedded on the surface of the control panel 140. The control panel 140 is connected to the device installed on the surface of the device mounting plate 130 through wires and wires, and the detection data is displayed and viewed through the display screen 141.

[0046] In a specific embodiment of the present invention, if the humidity of the environment in which the device is located is high, in order to prevent the device components from getting damp, an air inlet 107 is opened on the side wall of the second cavity 103, and an air exhaust port 109 is opened on the side wall of the first cavity 101. The air inlet 107 and the air exhaust port 109 are respectively opened on the outer surface of the shell 100, and an air exhaust port 111 is opened on the surface of the partition 110. The surfaces of the air exhaust port 111, the air inlet 107 and the air exhaust port 109 are respectively provided with dustproof nets, and an exhaust fan 113 is installed on the surface of the air exhaust port 111. By setting the air inlet 107, external air is introduced into the second cavity 103, and the incoming fluid enters the first cavity 101 through the air exhaust port 111. After double filtration, dust and debris entering the first cavity 101 are reduced. At the same time, the ventilation setting can effectively remove moisture generated in the first cavity 101.

[0047] In a specific embodiment of the present invention, a box body 160 is installed in the first cavity 101, one end of the box body 160 is connected to the exhaust port 111, and a baffle 161 is connected to the other port of the box body 160. A one-way exhaust valve is installed at the exhaust port 109. The provision of a one-way exhaust valve can effectively prevent gas from flowing back from the exhaust port 109 into the first cavity 101. A pressure sensor 163 is installed in the box body 160, and the upper end of the baffle 161 passes through the upper surface of the shell 100. A detachable baffle 161 is provided. The baffle 161 can be a filter plate to facilitate equipment maintenance and avoid dust accumulation causing the baffle 161 to block the airflow. The pressure sensor 163 can detect the pressure changes in the box body 160 in real time to ensure normal airflow.

[0048] Working principle: When in use, the fixed partition 110 in the shell 100 divides the shell 100 into a first cavity 101 and a second cavity 103. The installed temperature sensor monitors the temperature in the first cavity 101 in real time. When the heat generated by the device installed on the device mounting plate 130 is too high, the cooling plate 190 is used to cool it down and dissipate heat to ensure that the device operates at an appropriate temperature. The cooling plate 190 is used to cool and dissipate heat, and the shell effectively reduces dust accumulation on the surface of the device. Since the side of the device mounting plate 130 is provided with a tooth groove 131 along the device mounting plate 130, the device can be cooled and dissipated. The plate 130 is opened in the length direction, and the gear 151 is driven to rotate by controlling the rotation of the driving shaft of the motor 150, and then the rotating gear 151 pushes the equipment mounting plate 130 to slide, so that one end of the equipment mounting plate 130 slides to the outside of the shell 100 through the through slot 105 opened at one end of the first cavity 101, which is convenient for replacing and maintaining the equipment and electrical components installed on the equipment mounting plate 130; the cover plate 120 arranged on the surface of the through slot 105 is used to close and seal the through slot 105 to prevent dust from entering the first cavity 101.

[0049] It should be noted that the specific models and specifications of the motor 150, refrigeration fins 190, cooling fan 175, control panel 140, exhaust fan 113 and pressure sensor 163 need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0050] The power supply and principles of the motor 150 , the cooling fins 190 , the cooling fan 175 , the control panel 140 , the exhaust fan 113 , and the pressure sensor 163 are clear to those skilled in the art and are not described in detail here.

[0051] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

Claims

1. A phase regulator test bench insulation fault prediction device, characterized in that: comprising a housing (100); A partition (110) is fixed in the shell (100), and the partition (110) divides the shell (100) into a first cavity (101) and a second cavity (103). A refrigeration plate (190) is installed in the first cavity (101), and a temperature sensor is installed in the first cavity (101). A device mounting plate (130) is slidably arranged in the first cavity (101). A motor (150) is fixedly installed in the shell (100), and a drive shaft of the motor (150) is connected to a gear (151). A tooth groove (131) is provided on a side of the device mounting plate (130), and the tooth groove (131) is provided along the length direction of the device mounting plate (130); a through groove (105) is provided at one end of the first cavity (101), and a cover plate (120) is provided on the surface of the through groove (105); The motor (150) is fixed in the second cavity (103), one end of the device mounting plate (130) is arranged opposite to the through slot (105), one end of the cover plate (120) is hinged to the outer surface of the housing (100), and a sealing gasket is provided at the connection between the inner surface of the cover plate (120) and the end of the through slot (105); A rotating rod (153) is rotatably mounted in the second cavity (103); the gear (151) is coaxially fixedly connected to the rotating rod (153); a worm wheel (155) is coaxially fixed to the rotating rod (153); a worm (157) is coaxially fixed to the drive shaft of the motor (150); and the worm wheel (157) is meshed with the worm wheel (155); A heat-insulating box (170) is embedded in the top of the shell (100), the refrigeration sheet (190) is embedded in the bottom of the heat-insulating box (170), a heat dissipation hole (171) is provided on the top of the heat-insulating box (170), the refrigeration sheet (190) is a semiconductor refrigeration sheet, the cooling surface of the semiconductor refrigeration sheet is arranged in the first cavity (101), and the heating surface of the semiconductor refrigeration sheet is arranged in the heat-insulating box (170); The refrigeration fin (190) is fixedly connected to a heat sink (173), the heat sink (173) is arranged in the heat insulation box (170), the heat sink (173) is in contact with the heating surface of the semiconductor refrigeration fin, and a heat dissipation fan (175) is installed at the heat dissipation hole (171); An air inlet (107) is provided on the side wall of the second cavity (103), and an air outlet (109) is provided on the side wall of the first cavity (101). The air inlet (107) and the air outlet (109) are respectively provided on the outer surface of the shell (100). An air exhaust port (111) is provided on the surface of the partition (110). Dustproof nets are respectively provided on the surfaces of the air exhaust port (111), the air inlet (107), and the air outlet (109). An exhaust fan (113) is installed on the surface of the air exhaust port (111). A one-way exhaust valve is installed at the exhaust port (109), a box body (160) is installed in the first cavity (101), one end of the box body (160) is communicated with the exhaust port (111), and a baffle (161) is plugged into the other end of the box body (160), a pressure sensor (163) is installed in the box body (160), and the upper end of the baffle (161) passes through the upper surface of the shell (100).

2. The insulation fault prediction device for a phase modulator test bench according to claim 1, characterized in that: A rotating shaft (121) is fixed to one end of the cover plate (120), and the rotating shaft (121) is rotatably connected to the housing (100). A torsion spring is sleeved on the rotating shaft (121), and a first fulcrum of the torsion spring is fixed to the housing (100), and a second fulcrum of the torsion spring is fixedly connected to the cover plate (120).

3. The insulation fault prediction device for a phase modulator test bench according to claim 2, characterized in that: A control panel (140) is installed on the front of the housing (100), the cover plate (120) is arranged on the back of the housing (100), and a display screen (141) is embedded on the surface of the control panel (140).

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