Indicator lamp light guide mounting rack in electrical equipment
By using a light guide mounting bracket in the explosion-proof electrical equipment in coal mines, the status of the LED indicator light is projected onto the observation window, which solves the problem that the status of the LED indicator light cannot be observed, and achieves rapid fault judgment and maintenance.
Patent Information
- Application Number
- CN202422526757.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In explosion-proof electrical equipment with PLC control system underground in coal mines, the status of the LED indicator light cannot be observed through the observation window, resulting in difficulty in determining faults and increasing maintenance costs and time.
The internal indicator light guide mounting bracket of the electrical equipment is used, and the LED indicator status of the CPU module and analog module is projected onto the observation window to determine the cause of the fault through the observation window.
The cause of the fault can be judged without opening the cover, shortening the maintenance time, reducing the difficulty and cost of maintenance, and ensuring the continuity of coal production.
Smart Images
Figure CN223178713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a light guide mounting bracket for an internal indicator light of an electrical equipment, belonging to the technical field of auxiliary devices for the maintenance of underground coal mine electrical equipment. Background Technique
[0002] With the rapid development of intelligent coal mines, various electrical equipment in underground coal mines is also developing towards integration, modularization, and miniaturization, and most electrical equipment has applied PLC control systems. Due to the limitations of the conditions in underground coal mines and the regulations of the "Coal Mine Safety Regulations" and the "Electricity Operation Regulations": "It is strictly prohibited to work with electricity in underground coal mines." Handling faults with the cover open while the equipment is energized in underground coal mines belongs to the "Three Violations" red line, and zero tolerance is implemented in management, and severe penalties will be imposed.
[0003] The explosion-proof electrical equipment for coal mines with PLC is an explosion-proof electrical equipment with a programmable logic controller (PLC) and a HIM touch screen inside the switch, and it will be equipped with a glass observation window, which is the display area of the explosion-proof electrical equipment for coal mines and is used to observe the operating data displayed on the HIM touch screen inside the switch. The PLC, that is, the programmable logic controller, itself has LED indicator lights, which will be used as status indicators when normal or faulty. Maintenance personnel can judge and handle faults through the LED indicator lights. However, in the explosion-proof electrical equipment for coal mines with PLC, the programmable logic controller is installed inside the equipment, and the status of the LED indicator lights cannot be observed through the observation window after power-on, so the cause of the fault cannot be judged based on the status of the LED indicator lights when a fault occurs.
[0004] When the explosion-proof electrical equipment for coal mines with a PLC control system is opened with the cover removed while powered off to handle faults, on the one hand, due to the lack of power, it is still impossible to judge the root cause of the problem by observing the working indicator light status and fault status of the PLC and the working indicator light status of each modular and integrated electrical component; on the other hand, due to the addition of anti-interference circuits in the PLC and modular and integrated electrical components, a multimeter cannot be used for measurement and detection to judge, and only the replacement method can be used to judge the faults of electrical equipment. First, it increases the maintenance and production costs of coal mines, and second, it increases the fault handling time, seriously affecting coal production. Content of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a light guide mounting bracket for the internal indicator light of an electrical equipment, which is convenient for observing the working indicator light status of the PLC inside the electrical equipment, understanding the cause of the fault, and facilitating maintenance.
[0006] To achieve the above object, the utility model adopts the following technical solutions. An optical fiber light guide mounting bracket for internal indicator lights of an electrical device includes a first fixing plate, a second fixing plate, a third fixing plate, and soft optical fiber light guides. The first fixing plate is provided with first fixing holes that are the same in number and arrangement position as the LED indicator lights on the CPU module. The second fixing plate is provided with second fixing holes that are the same in number and arrangement position as the LED indicator lights on the analog quantity module. The third fixing plate is divided into a CPU area and an analog quantity module area. The CPU area is provided with third fixing holes that are the same in number as the first fixing holes, and the analog quantity module area is provided with fourth fixing holes that are the same in number as the second fixing holes.
[0007] One ends of multiple soft optical fiber light guides are respectively inserted into the first fixing holes and the second fixing holes, and the other ends are inserted into the corresponding third fixing holes and fourth fixing holes, connecting the first fixing holes and the corresponding third fixing holes, as well as the second fixing holes and the corresponding fourth fixing holes one by one.
[0008] Preferably, the first fixing plate is provided with three first grooves that can fit the three indicator light raised strips on the CPU module. The first fixing holes are located in the first grooves. The second fixing plate is provided with two second grooves that can fit the two indicator light raised strips on the analog quantity module. The second fixing holes are located in the second grooves.
[0009] Preferably, the first fixing plate is fixed on the front panel of the CPU module. The outer shape of the first fixing plate is adapted to the outer shape of the front panel of the CPU module, and its contact surface has a first wide groove adapted to the protrusions on the front panel of the CPU module.
[0010] The second fixing plate is fixed on the front panel of the analog quantity module. The outer shape of the second fixing plate is adapted to the outer shape of the front panel of the analog quantity module, and its contact surface has a second wide groove adapted to the protrusions on the front panel of the analog quantity module.
[0011] The third fixing plate is fixed on the observation window of the mine explosion-proof electrical equipment.
[0012] Further, a wiring notch is provided at a position corresponding to the RS485 communication port on the CPU module on the first fixing plate.
[0013] Further, two first side plates are vertically fixed on each of the left and right sides of the first fixing plate, and the four first side plates are respectively located in two upper guard plate mounting grooves and two lower guard plate mounting grooves on the front panel of the CPU module. First pin holes are provided at positions corresponding to the guard plate mounting holes of the CPU module on the four first side plates, and four first pin shafts are inserted into the corresponding first pin holes and the guard plate mounting holes of the CPU module for fixation.
[0014] On the left and right sides of the second fixed plate, two second side plates are vertically fixed respectively. The four second side plates are respectively located in four upper and lower guard plate installation slots on the front panel of the analog module. Second pin holes are opened at positions corresponding to the guard plate installation holes of the analog module on the four second side plates. Four second pin shafts are inserted into the corresponding second pin holes and the guard plate installation holes of the analog module for fixation.
[0015] Furthermore, between the four first side plates and the first fixed plate, and between the four second side plates and the second fixed plate, they are all adhesively bonded.
[0016] Furthermore, a communication board card reserved port is opened on the first fixed plate at a position corresponding to the communication board card on the front panel of the CPU module.
[0017] Preferably, the first fixed plate, the second fixed plate, and the third fixed plate are all made of acrylic material.
[0018] Preferably, the soft light guide optical fiber is a black leather soft optical fiber with a sheath.
[0019] Preferably, a first identifier identical to that on the CPU module is provided beside the third fixing hole, and a second identifier identical to that on the analog module is provided beside the fourth fixing hole.
[0020] Compared with the prior art, the utility model has the following beneficial effects.
[0021] 1. In the utility model, the states of the LED indicators on the CPU module and the analog module in the programmable controller are projected onto the observation window of the mine explosion-proof electrical equipment through the soft light guide optical fiber. When a fault occurs, maintenance personnel can judge the cause of the fault according to the states of the LED indicators without opening the cover, and then power off and open the cover for targeted maintenance, which shortens the maintenance time and ensures the normal production of coal.
[0022] 2. In the utility model, the outer shape of the first fixed plate is adapted to the outer shape of the front panel of the CPU module, and it is closely attached to the front panel of the CPU module. The outer shape of the second fixed plate is adapted to the outer shape of the front panel of the analog module, and it is closely attached to the front panel of the analog module. In this way, the first fixed plate and the second fixed plate both have the functions of the upper and lower guard plates, maintaining the aesthetics and safety of the module.
[0023] 3. In the utility model, the first fixed plate is installed through the first side plates and the first pin shafts, and the second fixed plate is installed through the second side plates and the second pin shafts. In this way, the first fixed plate and the second fixed plate are both convenient to disassemble and install, facilitating the maintenance of the CPU module and the analog module. Description of the Drawings
[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0025] Figure 1 It is a schematic structural diagram of the present invention.
[0026] Figure 2 It is a schematic structural diagram of the first fixing plate in the present invention.
[0027] Figure 3 It is a schematic structural diagram of the reverse side of the first fixing plate in the present invention.
[0028] Figure 4 It is a schematic structural diagram of the second fixing plate in the present invention.
[0029] Figure 5 It is a schematic structural diagram of the reverse side of the second fixing plate in the present invention.
[0030] Figure 6 It is a schematic structural diagram of the third fixing plate in the present invention.
[0031] Figure 7 It is a schematic diagram of the usage state of the present invention.
[0032] Figure 8 It is a schematic structural diagram after removing the upper and lower protection plates of the CPU module.
[0033] Figure 9 It is a schematic structural diagram after removing the upper and lower protection plates of the analog quantity module.
[0034] In the figure: 1 is the first fixing plate, 11 is the first fixing hole, 12 is the first groove, 13 is the wiring notch, 14 is the first side plate, 15 is the first pin hole, 16 is the first pin shaft, 17 is the communication board card reserved port, 18 is the first wide groove, 2 is the second fixing plate, 21 is the second fixing hole, 22 is the second groove, 23 is the second side plate, 24 is the second pin hole, 25 is the second pin shaft, 26 is the second wide groove, 3 is the third fixing plate, 31 is the CPU area, 32 is the analog quantity module area, 33 is the third fixing hole, 34 is the fourth fixing hole, 35 is the first identifier, 36 is the second identifier, 4 is the soft light guide optical fiber, 5 is the CPU module, 51 is the front panel of the CPU module, 52 is the upper protection plate installation groove, 53 is the lower protection plate installation groove, 54 is the protection plate installation hole, 6 is the analog quantity module, 61 is the front panel of the analog quantity module, 7 is the observation window. Specific embodiments
[0035] In combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative work belong to the scope protected by the present utility model.
[0036] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0037] As Figure 8 、 Figure 9 shown, the front panel 51 of the CPU module described in the present utility model refers to the panel exposed after removing the upper and lower protection plates of the CPU module 5, and the front panel 61 of the analog quantity module refers to the panel exposed after removing the upper and lower protection plates of the analog quantity module 6.
[0038] The present utility model provides the following embodiments.
[0039] As Figure 1 、 Figure 6 shown, a light guide mounting rack for internal indicator lights of an electrical device according to the present utility model includes a first fixing plate 1, a second fixing plate 2, a third fixing plate 3, and a soft light guide optical fiber 4; a first fixing hole 11 identical in number and arrangement position to the LED indicator lights on the CPU module 5 is formed on the first fixing plate 1, a second fixing hole 21 identical in number and arrangement position to the LED indicator lights on the analog quantity module 6 is formed on the second fixing plate 2, the third fixing plate 3 is divided into a CPU area 31 and an analog quantity module area 32, a third fixing hole 33 identical in number to the first fixing hole 11 is formed on the CPU area 31, and a fourth fixing hole 34 identical in number to the second fixing hole 21 is formed on the analog quantity module area 32;
[0040] One ends of multiple soft light guide optical fibers 4 are respectively inserted into the first fixing hole 11 and the second fixing hole 21, and the other ends are inserted into the corresponding third fixing hole 33 and fourth fixing hole 34, connecting the first fixing hole 11 and the corresponding third fixing hole 33, and the second fixing hole 21 and the corresponding fourth fixing hole 34 in one-to-one correspondence.
[0041] During use, fix the first fixing plate 1 on the LED indicator area of the CPU module 5, fix the second fixing plate 2 on the LED indicator area of the analog quantity module 6, and fix the third fixing plate 3 on the observation window 7 of the mine explosion-proof electrical equipment. Then, the indicator light states on the CPU module 5 and the analog quantity module 6 inside the mine explosion-proof electrical equipment can be projected onto the observation window 7. After a failure occurs, the cause of the failure can be initially judged by observing the indicator light states, and then the power supply can be cut off and the cover can be opened for maintenance, which can reduce the maintenance difficulty and shorten the maintenance time.
[0042] On the first fixing plate 1, there are three first grooves 12 that can fit with three indicator light protruding strips on the CPU module 5. The first fixing holes 11 are located inside the first grooves 12. On the second fixing plate 2, there are two second grooves 22 that can fit with two indicator light protruding strips on the analog quantity module 6. The second fixing holes 21 are located inside the second grooves 22. The setting of the first grooves 12 and the second grooves 22 can make the first fixing plate 1 and the second fixing plate 2 fit more closely to the surfaces of the corresponding modules, with better effects.
[0043] For more aesthetic appearance and better installation, the first fixing plate 1 and the second fixing plate 2 can be made the same size as the front panel 51 of the CPU module and the front panel 61 of the analog quantity module. The specific structure is as follows.
[0044] As Figure 2 、 Figure 3 shown, the first fixing plate 1 is fixed on the front panel 51 of the CPU module. The outer shape of the first fixing plate 1 is adapted to the outer shape of the front panel 51 of the CPU module, and there is a first wide groove 18 on its contact surface that is adapted to the protrusions on the front panel 51 of the CPU module;
[0045] As Figure 4 、 Figure 5 shown, the second fixing plate 2 is fixed on the front panel 61 of the analog quantity module. The outer shape of the second fixing plate 2 is adapted to the outer shape of the front panel 61 of the analog quantity module, and there is a second wide groove 26 on its contact surface that is adapted to the protrusions on the front panel 61 of the analog quantity module;
[0046] The third fixing plate 3 is fixed on the observation window 7 of the mine explosion-proof electrical equipment.
[0047] Example: For the CPU module 5 and the analog module 6 in the Siemens S7-200 SMART programmable controller, the size and shape of the outer shape of the first fixing plate 1 are adapted to the outer shape of the front panel 51 of the CPU module. It is made of 6 mm thick acrylic board. At the position corresponding to the three indicator light protruding strips in the middle of the first fixing plate 1, a first wide groove 18 with a depth of 3 mm is opened. Three first grooves 12 are correspondingly opened in the first wide groove 18, each corresponding to one of the three indicator light protruding strips. In this way, while fixing the soft light guide optical fiber, the first fixing plate 1 replaces the upper and lower protection plates and is still closely attached to the front panel 51 of the CPU module, combining practicality, aesthetics and safety. The size and shape of the outer shape of the second fixing plate 2 are adapted to the outer shape of the front panel 61 of the analog module. It is made of 6 mm thick acrylic board. At the position corresponding to the two indicator light protruding strips in the middle of the second fixing plate 2, a second wide groove 26 with a depth of 3 mm is opened. Two second grooves 22 are correspondingly opened in the second wide groove 26, each corresponding to one of the two indicator light protruding strips. In this way, while fixing the soft light guide optical fiber, the second fixing plate 2 replaces the upper and lower protection plates and is still closely attached to the front panel 61 of the analog module, combining practicality, aesthetics and safety. The third fixing plate 3 is made of 3 mm thick acrylic board and can be made into a rectangular flat plate, which is adhesively fixed on the observation window 7.
[0048] A wiring notch 13 is arranged on the first fixing plate 1 at the position corresponding to the RS485 communication port on the CPU module 5.
[0049] On the left and right sides of the first fixing plate 1, two first side plates 14 are vertically fixed respectively. The four first side plates 14 are respectively located in two upper protection plate installation grooves 52 and two lower protection plate installation grooves 53 on the front panel 51 of the CPU module. At the positions corresponding to the protection plate installation holes 54 of the CPU module on the four first side plates 14, first pin holes 15 are opened. Four first pin shafts 16 are inserted into the corresponding first pin holes 15 and the protection plate installation holes 54 of the CPU module for fixation;
[0050] On the left and right sides of the second fixing plate 2, two second side plates 23 are vertically fixed respectively. The four second side plates 23 are respectively located in the four upper and lower protection plate installation grooves on the front panel 61 of the analog module. At the positions corresponding to the protection plate installation holes of the analog module on the four second side plates 23, second pin holes 24 are opened. Four second pin shafts 25 are inserted into the corresponding second pin holes 24 and the protection plate installation holes of the analog module for fixation.
[0051] Between the four first side plates 14 and the first fixing plate 1, and between the four second side plates 23 and the second fixing plate 2, they are all adhesively bonded.
[0052] The shapes of the four first side plates 14 can be adapted to the two upper guard plate mounting grooves 52 and the two lower guard plate mounting grooves 53, so that after installation, there is a perfect fit between the first side plates 14 and the corresponding upper and lower guard plate mounting grooves 52 and 53, making it more aesthetically pleasing. The same applies to the second side plates 23.
[0053] The setting of the first side plates 14 and the second side plates 23 facilitates the installation and disassembly of the first fixing plate 1 and the second fixing plate 2. Just buckle the first fixing plate 1 onto the front panel 51 of the CPU module and insert the four first pin shafts 16. Similarly, for the second fixing plate 2, buckle it onto the front panel 61 of the analog quantity module and insert the four second pin shafts 25 to fix it. When disassembling, just remove the first pin shaft 16 and the second pin shaft 25.
[0054] Between the third fixing plate 3 and the observation window 7, they can be directly bonded and fixed.
[0055] A communication board card reserved opening 17 is provided on the first fixing plate 1 corresponding to the position of the communication board card 55 on the front panel 51 of the CPU module.
[0056] The first fixing plate 1, the second fixing plate 2, and the third fixing plate 3 are all made of acrylic material.
[0057] The soft light guiding optical fiber 4 is a black leather soft optical fiber with a sheath.
[0058] A first identifier 35 identical to that on the CPU module 5 is provided beside the third fixing hole 33, and a second identifier 36 identical to that on the analog quantity module 6 is provided beside the fourth fixing hole 34. In this way, the status of each indicator light can be seen more clearly, facilitating the judgment of the cause of the fault.
[0059] In the present utility model, the diameter of the soft light guiding optical fiber 4 is 2 mm, and the diameters of the first fixing hole 11, the second fixing hole 21, the third fixing hole 33, and the fourth fixing hole 34 are all 2.2 mm. In this way, the soft light guiding optical fiber 4 can be smoothly inserted into each fixing hole, and the connection is stable and not easily detached. Coupled with the relatively high temperature inside the mine explosion-proof electrical equipment, under the action of thermal expansion, the connection is even more stable and will not fall off.
[0060] As Figure 7 shown, the usage method of the present utility model is as follows.
[0061] After the explosion-proof electrical equipment for mining is powered off and the cover is opened, remove the upper and lower protective plates of the CPU module 5, and fix the first fixing plate 1 on the front panel 51 of the CPU module. The first fixing holes 11 on it correspond one by one to the positions of the LED indicators on the CPU module 5; then remove the upper and lower protective plates of the analog quantity module 6, fix the second fixing plate 2 on the front panel 61 of the analog quantity module, and the second fixing holes 21 on it correspond one by one to the positions of the LED indicators on the analog quantity module 6. Fix the third fixing plate 3 on the inner side of the observation window 7. The number of soft light guide optical fibers 4 is determined according to the actual situation. It can be chosen to connect all the corresponding holes, or only connect the holes corresponding to several indicators that are often looked at when a fault occurs to save costs. Finally, close the cover and power on. In this way, through the present utility model, the states of each LED indicator are projected onto the observation window 7, realizing the display of the indicator states without difference in position inside and outside the equipment, and realizing the judgment of the fault cause according to the indicator states after a fault occurs.
[0062] During the above fixing process, the third fixing plate 3 can be adhered to the inner side of the observation window 7 with epoxy resin glue, and the first fixing plate 1 can be adhered to the CPU module 5, which can be bonded with tape, or can replace the function of the protective plate, that is, remove the upper and lower terminal protective plates of the CPU module 5, and fix the first fixing plate 1 with the first pin shaft 16. The second fixing plate 2 is the same as the first fixing plate 1, can be adhered to the analog quantity module 6, can be bonded with tape, or can be fixed with the second pin shaft 25.
[0063] For the third fixing plate 3, on the premise of not affecting the observation of the operation data, it is determined according to the size of the observation window 7 and the size of the remaining display area. The arrangement of the third fixing holes 34 and the fourth fixing holes 35 on it should correspond to the first fixing holes 1 and the second fixing holes 2, and the hole pitch can be appropriately reduced or enlarged.
[0064] In the attached drawings of the present utility model, the programmable controller model is Siemens S7-200 SMART. In different models of programmable controllers, the shapes and the arrangements of the LED indicators of the CPU module 5 and the analog quantity module 6 may be different. The first fixing holes 11 and the first grooves 12 on the first fixing frame 1, and the second fixing holes 21 and the second grooves 22 on the second fixing frame 2 can be changed accordingly according to the specific arrangements and shapes. If there are protrusions at the parts where the CPU module 5 and the analog quantity module 6 are in contact with the first fixing frame 1 and the second fixing frame 2, corresponding grooves can be made on the contact surfaces of the first fixing frame 1 and the second fixing frame 2. The purpose is to make the first fixing frame 1, the second fixing frame 2 and the CPU module 5, the analog quantity module 6 fit as closely as possible. In this way, it is not only beautiful, but also the connection is more stable and not easy to fall off, and the ends of the soft light guide optical fibers 4 can also better correspond to the LED indicators, making the display on the third fixing frame 3 clearer and more obvious.
[0065] In the present utility model, the diameter of the flexible light guiding optical fiber 4 is adapted to the diameters of the respective fixing holes, enabling it to be inserted and not easily fall off after insertion. Moreover, due to the relatively high temperature inside the device, under the action of thermal expansion and contraction, the connection between the flexible light guiding optical fiber 4 and the respective fixing holes becomes even tighter and will not fall off. If there are any individual loose ones, they can be inserted again after applying glue to the surface of the flexible light guiding optical fiber 4.
[0066] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claimed rights.
Claims
1. An internal indicator light light guide mounting bracket for an electrical device, characterized in that: It includes a first fixing plate (1), a second fixing plate (2), a third fixing plate (3) and a flexible light guide optical fiber (4); a first fixing hole (11) identical in number and arranged position to the LED indicator lights on the CPU module (5) is formed on the first fixing plate (1), a second fixing hole (21) identical in number and arranged position to the LED indicator lights on the analog module (6) is formed on the second fixing plate (2), the third fixing plate (3) is divided into a CPU area (31) and an analog module area (32), a third fixing hole (33) with the same number as the first fixing hole (11) is formed on the CPU area (31), and a fourth fixing hole (34) with the same number as the second fixing hole (21) is formed on the analog module area (32); One ends of multiple flexible light guide optical fibers (4) are respectively inserted into the first fixing hole (11) and the second fixing hole (21), and the other ends are inserted into the corresponding third fixing hole (33) and fourth fixing hole (34), connecting the first fixing hole (11) and the corresponding third fixing hole (33), and the second fixing hole (21) and the corresponding fourth fixing hole (34) in one-to-one correspondence.
2. The light guide mounting bracket for the internal indicator light of an electrical device according to claim 1, characterized in that: Three first grooves (12) adapted to fit three indicator light raised strips on the CPU module (5) are formed on the first fixing plate (1), the first fixing hole (11) is located in the first groove (12), two second grooves (22) adapted to fit two indicator light raised strips on the analog module (6) are formed on the second fixing plate (2), and the second fixing hole (21) is located in the second groove (22).
3. The light guide mounting bracket for the internal indicator light of an electrical device according to claim 1, characterized in that: The first fixing plate (1) is fixed on the front panel (51) of the CPU module, the outer shape of the first fixing plate (1) is adapted to the outer shape of the front panel (51) of the CPU module, and a first wide groove (18) adapted to the protrusions on the front panel (51) of the CPU module is formed on its contact surface; The second fixing plate (2) is fixed on the front panel (61) of the analog module, the outer shape of the second fixing plate (2) is adapted to the outer shape of the front panel (61) of the analog module, and a second wide groove (26) adapted to the protrusions on the front panel (61) of the analog module is formed on its contact surface; The third fixing plate (3) is fixed on the observation window (7) of the mine explosion-proof electrical equipment.
4. An internal indicator light light guide mounting bracket for an electrical device according to claim 3, characterized in that: A wiring notch (13) is arranged at the position corresponding to the RS485 communication port on the CPU module (5) on the first fixing plate (1).
5. An internal indicator light light guide mounting bracket for an electrical device according to claim 4, characterized in that: Two first side plates (14) are vertically fixed on each of the left and right sides of the first fixing plate (1), the four first side plates (14) are respectively located in two upper guard plate installation grooves (52) and two lower guard plate installation grooves (53) on the front panel (51) of the CPU module, and first pin holes (15) are formed at the positions corresponding to the CPU module guard plate installation holes (54) on the four first side plates (14), and four first pin shafts (16) are inserted into the corresponding first pin holes (15) and CPU module guard plate installation holes (54) for fixation; On the left and right sides of the second fixing plate (2), two second side plates (23) are vertically fixed respectively. The four second side plates (23) are respectively located in four upper and lower guard plate mounting grooves on the front panel (61) of the analog module. Second pin holes (24) are formed at positions corresponding to the guard plate mounting holes of the analog module on the four second side plates (23). Four second pin shafts (25) are inserted into the corresponding second pin holes (24) and the guard plate mounting holes of the analog module for fixation.
6. The light guide mounting bracket for the internal indicator light of an electrical device according to claim 5, characterized in that: Between the four first side plates (14) and the first fixing plate (1), and between the four second side plates (23) and the second fixing plate (2), they are all bonded.
7. An internal indicator light light guide mounting bracket for an electrical device according to any one of claims 3-6, characterized in that: A communication board card reserved opening (17) is formed on the first fixing plate (1) at a position corresponding to the communication board card (55) on the front panel (51) of the CPU module.
8. An internal indicator light light guide mounting bracket for an electrical device according to any one of claims 1-6, characterized in that: The first fixing plate (1), the second fixing plate (2) and the third fixing plate (3) are all made of acrylic material.
9. An internal indicator light light guide mounting bracket for an electrical device according to any one of claims 1-6, characterized in that: The soft light guiding optical fiber (4) is a black leather soft optical fiber with a sheath.
10. A light guide mounting bracket for an internal indicator light of an electrical device according to any one of claims 1-6, characterized in that: A first identifier (35) identical to that on the CPU module (5) is provided beside the third fixing hole (33), and a second identifier (36) identical to that on the analog module (6) is provided beside the fourth fixing hole (34).