Closed electric power device with explosion-proof monitoring window

Abstract

The utility model relates to a closed electric power device with an explosion-proof monitoring window, and belongs to the technical field of electric power equipment monitoring, the closed electric power device comprises a cabinet body, and the cabinet body is provided with the explosion-proof monitoring window. According to the explosion-proof monitoring window, the flange base is fixed to the equipment cabinet body through the first baffle ring and the second baffle ring which are oppositely arranged on the two sides of the cabinet body, the first baffle ring and the second baffle ring are relatively stably clamped by matching with the pressure applied to the second baffle ring by the reset spring, and installation is firm. Meanwhile, air pressure in the cabinet body can be released in time through the pressure release flow channel, the explosion risk is reduced, impact force borne by the flange base can be buffered, impact damage borne by the device is relieved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment monitoring, and in particular to a sealed power device with an explosion-proof monitoring window. Background Art

[0002] A sealed electrical device generally uses a closed cavity in its structural design to isolate its internal components from the external environment, preventing the ingress of impurities, moisture, corrosive gases, and other substances while ensuring the leakage of internal insulating media (such as SF6 gas and insulating oil). Such devices are widely used in power systems, especially in high-voltage, ultra-high-voltage, and ultra-high-voltage applications. Their airtight design is crucial to ensuring the safe and stable operation of the equipment. However, due to the sealed nature of sealed electrical devices, heat generated during operation can accumulate internally, causing internal temperatures to rise, posing a serious safety hazard.

[0003] Therefore, it is crucial to monitor the internal temperature of enclosed electrical equipment. A commonly used monitoring method currently uses a temperature measurement window within the enclosed electrical equipment to detect the heating of the conductive contact surfaces and components within the enclosed electrical equipment. This allows for continuous monitoring of the internal operating status of the equipment, and enables real-time infrared imaging detection while the equipment is energized. However, most current temperature measurement windows are mounted on the outside of the cabinet panel of the enclosed electrical equipment via flange assemblies and secured to the cabinet with nuts. If an arcing or explosion occurs within the enclosed electrical equipment, the temperature measurement window will be subjected to a large amount of transient impact loads in a short period of time. This impact load will be transmitted to the connecting threads, which have low impact resistance and are easily detached from the equipment cabinet, posing a serious safety hazard. Utility Model Content

[0004] To overcome the above-mentioned deficiencies of the prior art, the present application provides a sealed electrical device with an explosion-proof monitoring window, which specifically adopts the following technical solutions:

[0005] The present application specifically discloses a sealed power device with an explosion-proof monitoring window, wherein the sealed power device includes a cabinet body, the cabinet body is provided with an explosion-proof monitoring window, and the explosion-proof monitoring window includes a flange base, a first retaining ring, a second retaining ring and a flange end cover.

[0006] The flange base includes an axially extending first flange section and a second flange section, the second flange section is located inside the cabinet, one end of the first flange section extends to the inside of the cabinet, and one end of the first flange section is connected to the second flange section; the other end of the first flange section extends through and extends to the outside of the cabinet, and the other end of the first flange section is fixedly connected to the flange end cover;

[0007] The first blocking ring is located outside the cabinet body, and the first blocking ring is sleeved on the part of the first flange section located outside the cabinet body, and the first blocking ring is fixed outside the cabinet body; the second blocking ring is located inside the cabinet body, and the second blocking ring is sleeved on the part of the first flange section located inside the cabinet body; the flange base is kept installed on the cabinet body by the relative clamping of the first blocking ring and the second blocking ring.

[0008] The second blocking ring is provided with at least two guide rods, and one end of the second flange section is provided with a guide hole matched with the guide rods; a reset spring in a compressed state is arranged between the second blocking ring and the second flange section, and the reset spring is sleeved on the guide rods.

[0009] At least one pressure relief flow channel is arranged in the first flange section, and the pressure relief flow channel is used for relieving the internal gas pressure of the cabinet body.

[0010] Optionally, the pressure relief flow channel comprises a first air hole, a second air hole and a communication air channel, the first air hole is arranged on the circumferential surface of the part of the first flange section located outside the cabinet body, the second air hole is arranged on the circumferential surface of the part of the first flange section located inside the cabinet body, and the communication air channel is arranged inside the first flange section, and the communication air channel is used for keeping the first air hole and the second air hole in communication.

[0011] Optionally, the first blocking ring is provided with at least two buffer cavities, and one buffer thimble is arranged in each buffer cavity, one end of the buffer thimble is provided with a plug, the plug is located in the buffer cavity, and the other end of the buffer thimble extends through to the inside of the cabinet body, and the buffer thimble is used for buffering the impact force of the flange base.

[0012] Optionally, the buffer cavity is provided with an air inlet flow channel, and when in an unrelieved state, the air inlet flow channel is in communication with the first air hole of the pressure relief flow channel.

[0013] Optionally, a buffer spring is arranged in the buffer cavity, one end of the buffer spring abuts against the plug, and the other end of the buffer spring abuts against the bottom end face of the buffer cavity.

[0014] Optionally, the flange end cover comprises a first threaded part, a second threaded part and an intermediate connecting body, the intermediate connecting body is located between the first threaded part and the second threaded part, the intermediate connecting body is provided with a flange, the flange abuts against the other end of the first flange section, the first threaded part is located on the side of the intermediate connecting body away from the cabinet body, and the second threaded part is located on the side of the intermediate connecting body facing the cabinet body.

[0015] Optionally, the other end of the first flange section is provided with an internal thread structure, and the internal thread structure is connected with the second threaded part of the flange end cover.

[0016] Optionally, a mounting hole is provided in the middle of the second flange section, a temperature sensor is disposed in the mounting hole, and the temperature sensor is sealed and connected to the mounting hole.

[0017] Optionally, an explosion-proof partition is further provided in the mounting hole, and the explosion-proof partition is located at a position where the temperature sensor faces the outside of the cabinet.

[0018] Optionally: the above device also includes a dust cover, which is connected to the first threaded portion of the flange end cover.

[0019] The technical solution of this application has the following beneficial effects:

[0020] (1) The enclosed electrical device of the present application is equipped with a monitoring window with explosion-proof function. The flange base is fixed to the cabinet of the equipment by relatively clamping the first retaining ring and the second retaining ring. The pressure exerted by the return spring on the second retaining ring makes the second retaining ring fit tightly to the inner surface of the cabinet, so that the first retaining ring and the second retaining ring are relatively stably clamped and firmly installed. At the same time, the internal pressure of the cabinet can be released in time through the pressure relief channel to reduce the risk of explosion.

[0021] (2) The explosion-proof monitoring window in the enclosed power device of the present application utilizes a buffer cavity in conjunction with a pressure relief channel. When the pressure inside the device increases and the pressure is not relieved, the air flow inside the device flows into the buffer cavity through the pressure relief channel and the air inlet channel, causing the buffer ejector pin to reset. Once the internal air pressure of the device increases instantaneously, the internal air pressure of the device overcomes the pressure applied by the reset spring, and the flange base will be pushed outward from the cabinet to relieve the pressure. At this time, the buffer ejector pin can effectively buffer the impact force on the flange base, reduce the impact damage to the device, extend its service life, and ensure normal temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the enclosed power device in the embodiment of the present application.

[0023] Figure 2 This is a schematic diagram of the signal flow process when collecting the internal temperature of the cabinet through the explosion-proof monitoring window in an embodiment of the present application.

[0024] Figure 3 This is an exploded view of the overall structure of the explosion-proof monitoring window in an embodiment of the present application.

[0025] Figure 4 This is an assembly diagram of the explosion-proof monitoring window configured on the cabinet in an embodiment of the present application.

[0026] Figure 5 This is a structural diagram of the flange base in an embodiment of the present application.

[0027] Figure 6 This is a schematic structural diagram of the first retaining ring in an embodiment of the present application.

[0028] The specific meanings of the reference numerals in the accompanying drawings are:

[0029] 1-cabinet; 2-explosion-proof monitoring window; 21-flange base; 211-connecting air duct; 212-first air hole; 213-second air hole; 214-guide hole; 215-flow balancing groove; 22-first retaining ring; 221-buffer cavity; 222-inlet air duct; 23-second retaining ring; 231-guide rod; 232-through hole; 24-flange end cover; 241-first threaded portion; 242-second threaded portion; 243-flange; 25-reset spring; 26-explosion-proof partition; 27-temperature sensor; 28-circlip; 29-buffer ejector pin. DETAILED DESCRIPTION

[0030] The present application will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application and are not intended to limit the scope of protection of the present application. It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application.

[0031] In order to clearly demonstrate the spatial layout of the technical solution of this application and the relative position relationship of each component, the view perspective presented in the accompanying drawings is used as a reference. The above directional description is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0032] Specific, combined Figure 1 As shown, an embodiment of the present application discloses a sealed electrical device with an explosion-proof monitoring window, which is intended to provide reliable temperature monitoring guarantee for the stable operation of the sealed electrical device, while effectively resisting internal pressure shocks to avoid equipment damage and safety accidents.

[0033] Combine Figure 1 As shown, the enclosed electrical device of this embodiment includes a cabinet body, and the cabinet body is provided with at least one explosion-proof monitoring window, wherein the explosion-proof monitoring window is provided with a temperature sensor, and the temperature sensor is used to monitor the temperature of each electrical component group inside the cabinet body as a whole. Figure 2As shown, the enclosed electrical device of this embodiment is equipped with a data converter and a monitoring terminal outside the cabinet. The data converter is used to convert sensor-collected data into corresponding digital signals. In this embodiment, the data converter is equipped with an analog-to-digital converter and a microprocessor. The analog-to-digital converter captures the instantaneous value of the corresponding sensor analog signal at a fixed frequency and maps it to a corresponding digital signal. The analog-to-digital converter then outputs the signal to the microcontroller for processing such as noise removal and calibration. The microprocessor then encapsulates the digital signal into a communication frame and transmits it to the monitoring terminal. The monitoring terminal of this embodiment is equipped with an algorithm and a display. The algorithm performs threshold comparison and trend analysis on the collected temperature data and also outputs the temperature data to the display for real-time display. The results output by the algorithm can be used to control the industrial control terminal of the corresponding enclosed electrical device. In this embodiment, the processor of the industrial control terminal generates corresponding control instructions based on the signals output by the monitoring terminal and transmits them to the electrical component group within the cabinet.

[0034] Specifically, such as Figure 3 As shown, the explosion-proof monitoring window of this embodiment includes a flange base 21, a first retaining ring 22, a second retaining ring 23 and a flange end cover 24, wherein the flange base 21 is the structural main body of the explosion-proof monitoring window.

[0035] Combine Figure 3 and Figure 5 As shown, the flange base 21 includes an axially through first flange section I and a second flange section II, wherein a through hole is provided in the middle of the first flange section I, and a mounting hole is provided in the middle of the second flange section II. The through hole is used to provide an observation channel, and the mounting hole is used to assemble the temperature sensor 27. A retaining spring 28 is provided in the mounting hole, and the temperature sensor 27 can be fixed by the retaining spring 28, and the temperature sensor 27 is sealed and connected to the mounting hole.

[0036] It should be noted that since the enclosed power device of this embodiment is mostly used in high voltage environments, the temperature sensor may preferably be a non-contact infrared temperature sensor, such as an array infrared sensor or an infrared chip, to avoid short circuit risks or insulation damage.

[0037] Further, such as Figure 4 As shown, in this embodiment, the second flange segment II is located inside the cabinet 1. One end of the first flange segment I extends inside the cabinet 1 and is fixedly connected to the second flange segment II. The other end of the first flange segment I penetrates the cabinet 1 of the enclosed power device and extends outside the cabinet 1. Furthermore, in this embodiment, a flange end cap 24 is connected to the other end of the first flange segment I. The main purpose of the flange end cap 24 is to limit and fix the flange base 21.

[0038] Specifically, such as Figure 4As shown, the flange end cap 24 includes a first threaded portion 241, a second threaded portion 242, and an intermediate connector. The intermediate connector is located between the first threaded portion 241 and the second threaded portion 242 and is provided with a flange 243. The first threaded portion 241 is located on the side of the intermediate connector facing away from the cabinet 1, while the second threaded portion 242 is located on the side of the intermediate connector facing the cabinet 1. The other end of the first flange segment I is provided with an internal thread structure, which connects to the second threaded portion 242 of the flange end cap 24. Therefore, through the threaded connection between the internal thread structure and the second threaded portion 242, the flange end cap 24 can be secured to the first flange segment I, and the flange 243 of the intermediate connector abuts the end of the first flange segment I. A dust cover is provided on the first threaded portion 241 of the flange end cap 24 to prevent external dust from entering the device and affecting the temperature measurement effect.

[0039] Further, combined Figure 4 and Figure 5 As shown, in this embodiment, the first retaining ring 22 is located outside the cabinet 1 and is sleeved over the portion of the first flange section I located outside the cabinet 1. The first retaining ring 22 is fixedly connected to the outside of the cabinet 1. At this time, the first retaining ring 22 and the first flange section I are not fixed axially, and the flange end cover 24 can prevent the first retaining ring 22 from separating from the first flange section I. The second retaining ring 23 is located inside the cabinet 1 and sleeved over the portion of the first flange section I located inside the cabinet 1. At this time, the second retaining ring 23 is tightly attached to the inside of the cabinet 1. By clamping the first retaining ring 22 and the second retaining ring 23 relative to each other, the flange base 21 can be installed on the cabinet 1 of the equipment. This bidirectional clamping not only improves the stability of the device installation, but also evenly distributes the pressure inside the equipment to the cabinet 1 of the enclosed electrical device through the retaining rings, greatly enhancing the device's impact resistance.

[0040] Further, such as Figure 3As shown, in this embodiment, the second retaining ring 23 is provided with at least two guide rods 231, and one end of the second flange segment II is provided with a guide hole 214 adapted to accommodate the guide rods 231. When the second retaining ring 23 is properly installed on the flange base 21, a portion of the guide rod 231 will always extend into the guide hole 214. Furthermore, in this embodiment, a compressed return spring 25 is sleeved on the guide rod 231. Because the return spring 25 is located between the second retaining ring 23 and the second flange segment II, the compressed return spring 25 applies pressure to the second retaining ring 23 and the flange base 21, respectively. When the second retaining ring 23 is under stress, it will adhere tightly to the inside of the cabinet 1, while the flange base 21 will tend to move inward of the cabinet 1 under stress. However, due to the restriction of the flange end cover 24, the flange base 21 cannot move. At this time, the first retaining ring 22 and the second retaining ring 23 are clamped relative to each other.

[0041] More specifically, in order to achieve the explosion-proof function, the explosion-proof monitoring window of this embodiment needs to discharge the high-pressure gas inside the enclosed electrical device in time. Therefore, this embodiment is provided with at least one pressure relief channel in the first flange section I, and the pressure relief channel is used to relieve the internal air pressure of the cabinet 1.

[0042] More detailed, such as Figure 4 As shown, the pressure relief channel of this embodiment includes a first air hole 212, a second air hole 213 and a connecting air channel 211, wherein the connecting air channel 211 is built into the interior of the first flange section I, and the first air hole 212 is provided on the circumferential surface of the first flange section I on the outer side of the cabinet body 1; the second air hole 213 is provided on the circumferential surface of the first flange section I on the inner side of the cabinet body 1, and the first air hole 212 and the second air hole 213 can be kept in communication through the connecting air channel 211.

[0043] It should be noted that, combined with Figure 4As shown, in the explosion-proof monitoring window of this embodiment, under normal conditions, the first retaining ring 22 will cover the first air hole 212. At this time, the first air hole 212 cannot be connected to the external environment, while the second air hole 213 remains connected to the inside of the equipment, and the enclosed electrical device as a whole remains sealed. When an accident such as an arc explosion occurs inside the equipment, the internal air pressure will rise rapidly. At this time, under the action of the internal air pressure, the flange base 21 will be pushed to overcome the pressure applied by the reset spring 25, and the flange base 21 will move toward the outside of the cabinet 1. Since the first retaining ring 22 is fixed to the outer surface of the cabinet 1, as the flange base 21 moves axially, the first air hole 212 is no longer blocked by the first retaining ring 22. The first air hole 212 is connected to the external environment, and the high-pressure air pressure inside the equipment will be quickly discharged to the outside through the pressure relief channel. As the high-pressure gas inside the equipment is discharged, the internal pressure decreases (the flange base 21 can no longer overcome the pressure applied by the reset spring 25). At this time, the flange base 21 will move toward the inside of the cabinet 1 due to the force applied by the reset spring 25. The first air hole 212 is covered by the first retaining ring 22 again, and the enclosed electrical device remains sealed again.

[0044] Furthermore, when an arc explosion or other accidents occur inside the equipment, the internal pressure of the equipment will rise rapidly. At this time, the instantaneous impact force borne by the flange base 21 is large, and the flange base 21 will hit the equipment cabinet 1 with a large impact force. In order to cushion the impact force borne by the flange base 21, the flange base 21 is combined with the flange base 21 to form a plurality of flanges. Figure 4 and Figure 6 As shown, in this embodiment, at least two buffer cavities 221 are provided in the first retaining ring 22, and each buffer cavity 221 is provided with a buffer pin 29. One end of the buffer pin 29 is provided with a plug, which is located within the buffer cavity 221. In addition, as another embodiment, a buffer spring can be further provided within the buffer cavity 221, with one end of the buffer spring abutting the plug and the other end abutting the bottom end surface of the buffer cavity 221. The other end of the buffer pin 29 extends through to the inside of the cabinet 1. Under normal conditions, the buffer pin 29 extends out of the buffer cavity 221 under the action of the buffer spring. When the flange base 21 is affected by the internal air pressure of the equipment and moves a distance toward the outside of the cabinet 1, the other end of the buffer pin 29 will abut the flange base 21, generating a reverse force on the flange base 21. As the flange base 21 continues to move toward the outside of the cabinet 1, the air pressure in the buffer spring or buffer cavity 221 gradually increases, thereby reducing the speed at which the flange base 21 hits the cabinet 1, thereby reducing the instantaneous impact force of the flange base 21 and preventing the flange base 21 from hitting the cabinet 1 at high speed, causing damage to the cabinet 1.

[0045] Furthermore, if Figure 4As shown, this embodiment may also include an inlet air duct 222 within the buffer cavity 221. When the enclosed electrical device is in a non-depressurized state (i.e., the interior of the device remains completely sealed), the inlet air duct 222 maintains communication with the first air hole 212 of the pressure relief duct. At this point, the interior of the device is connected to the buffer cavity 221. Once the air pressure within the device increases, the air pressure within the buffer cavity 221 also increases, further promoting the extension of the buffer ejector pin 29. Once the flange base 21, affected by the internal air pressure of the device, moves a certain distance toward the outside of the cabinet 1, the inlet air duct 222 becomes dislocated from the first air hole 212. At this point, the inlet air duct 222 is sealed by the first flange segment I, and the interior of the buffer cavity 221 remains at a high pressure. When the other end of the buffer pin 29 abuts against the flange base 21, as the flange base 21 continues to move toward the outside of the cabinet 1, the high-pressure gas in the buffer cavity 221 is compressed, and the buffer pin 29 can generate a greater buffering force, which can assist the buffer spring to further reduce the speed of the flange base 21 when it hits the cabinet 1, thereby greatly reducing the instantaneous impact force of the flange base 21.

[0046] In addition, in this embodiment, there is no specific limit on the number of pressure relief channels of the flange base 21 and the buffer cavities 221 of the first retaining ring 22. Generally, the number of pressure relief channels and buffer cavities 221 is equal, and their positions correspond one to one. However, the number of buffer cavities 221 can be less than the number of pressure relief channels. When the enclosed electrical device is in a non-depressurized state, in order to increase the air intake speed of the buffer cavity, a circle of equalizing grooves 215 can be set at the position of the first air hole 212 of the first flange section I, such as Figure 5 The gas inside the device flows out through the first air hole 212 of the pressure relief channel, and then flows stably and evenly in the flow equalization groove 215, thereby keeping the gas pressure in each buffer cavity 221 consistent.

[0047] It should be noted that in this embodiment, a through hole 232 is provided in both the cabinet body 1 and the second retaining ring 23. The through hole 232 is used to provide a passage for the buffer ejector pin 29, and the diameter of the through hole located in the cabinet body 1 needs to be smaller than the diameter of the buffer cavity 221, thereby preventing the buffer ejector pin 29 from extending too long.

[0048] In addition, combined Figure 3 and Figure 4 As shown, this embodiment further provides an explosion-proof baffle 26 in the mounting hole, and the explosion-proof baffle 26 is located at a position where the temperature sensor 27 faces the outside of the cabinet 1. If the temperature sensor 27 explodes during use, the explosion-proof baffle 26 can block the debris inside the window to prevent the debris from flying around and injuring people.

[0049] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A sealed electrical device with an explosion-proof monitoring window, characterized in that: The enclosed power device includes a cabinet body, the cabinet body is provided with an explosion-proof monitoring window, the explosion-proof monitoring window includes a flange base, a first retaining ring, a second retaining ring and a flange end cover, The flange base includes an axially extending first flange section and a second flange section, the second flange section is located inside the cabinet, one end of the first flange section extends to the inside of the cabinet, and one end of the first flange section is connected to the second flange section; the other end of the first flange section extends through and extends to the outside of the cabinet, and the other end of the first flange section is fixedly connected to the flange end cover; The first retaining ring is located outside the cabinet, and the first retaining ring is sleeved on the portion of the first flange section outside the cabinet, and the first retaining ring is fixed to the outside of the cabinet; the second retaining ring is located inside the cabinet, and the second retaining ring is sleeved on the portion of the first flange section inside the cabinet; the flange base is kept installed on the cabinet by clamping the first retaining ring and the second retaining ring relative to each other; The second retaining ring is provided with at least two guide rods, and one end of the second flange section is provided with a guide hole adapted for the guide rods; a return spring in a compressed state is provided between the second retaining ring and the second flange section, and the return spring is sleeved on the guide rods; At least one pressure relief channel is provided in the first flange section, and the pressure relief channel is used to relieve the air pressure inside the cabinet.

2. The enclosed electrical device with an explosion-proof monitoring window according to claim 1, characterized in that: The pressure relief channel includes a first air hole, a second air hole and a connecting air channel. The first air hole is provided on the circumferential surface of the first flange section on the outer side of the cabinet body; the second air hole is provided on the circumferential surface of the first flange section on the inner side of the cabinet body; the connecting air channel is arranged inside the first flange section, and the connecting air channel is used to keep the first air hole and the second air hole connected.

3. The enclosed electrical device with an explosion-proof monitoring window according to claim 2, characterized in that: The first retaining ring is provided with at least two buffer cavities, and each buffer cavity is provided with a buffer ejector pin, one end of the buffer ejector pin is provided with a plug, and the plug is located in the buffer cavity; the other end of the buffer ejector pin extends through to the inside of the cabinet, and the buffer ejector pin is used to buffer the impact force of the flange base.

4. The enclosed electrical device with an explosion-proof monitoring window according to claim 3, characterized in that: The buffer cavity is provided with an inlet flow channel, and when in a non-depressurized state, the inlet flow channel is communicated with the first air hole of the pressure relief flow channel.

5. A sealed electrical device with an explosion-proof monitoring window according to claim 3 or 4, characterized in that: A buffer spring is provided in the buffer cavity, one end of the buffer spring abuts against the plug, and the other end of the buffer spring abuts against the bottom end surface of the buffer cavity.

6. The enclosed electrical device with an explosion-proof monitoring window according to claim 1, characterized in that: The flange end cover includes a first threaded portion, a second threaded portion and an intermediate connecting body. The intermediate connecting body is located between the first threaded portion and the second threaded portion. The intermediate connecting body is provided with a circle of flange, and the flange abuts the other end of the first flange segment; the first threaded portion is located on the side of the intermediate connecting body facing away from the cabinet body, and the second threaded portion is located on the side of the intermediate connecting body facing the cabinet body.

7. The enclosed electrical device with an explosion-proof monitoring window according to claim 5, characterized in that: The other end of the first flange segment is provided with an internal thread structure, and the internal thread structure is connected to the second threaded portion of the flange end cover.

8. The enclosed electrical device with an explosion-proof monitoring window according to claim 1, characterized in that: A mounting hole is provided in the middle of the second flange section. A temperature sensor is disposed in the mounting hole and is sealed and connected to the mounting hole.

9. The enclosed electrical device with an explosion-proof monitoring window according to claim 8, characterized in that: An explosion-proof partition is also provided in the installation hole, and the explosion-proof partition is located at a position where the temperature sensor faces the outside of the cabinet.

10. The enclosed electrical device with an explosion-proof monitoring window according to claim 6, characterized in that: A dust cover is also included, and the dust cover is connected to the first threaded portion of the flange end cover.

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