Explosion-proof observation device matched with electric cabinet

Abstract

The invention belongs to the technical field of explosion prevention of electrical equipment, and particularly relates to an observation device matched with an explosion-proof electric control box, the observation device matched with the explosion-proof electric control box is arranged on the electric control box and comprises a mounting seat, a glass component and a pressing block assembly, the mounting seat is clamped on a shell of an electric controller, the mounting seat is provided with a mounting hole, and the glass component is arranged in the mounting hole. The glass component is arranged in the mounting hole, the pressing block assembly is connected with the mounting base and the electric controller shell, the mounting base is arranged between the pressing block assembly and the electric controller shell, and the first explosion-proof combination face is not parallel to the second explosion-proof combination face and the fourth explosion-proof combination face. The fourth explosion-proof combination surface is not parallel to the first explosion-proof combination surface and the second explosion-proof combination surface. According to the observation device matched with the explosion-proof electric cabinet, the explosion-proof performance of the electric cabinet is improved.

Description

Technical Field

[0001] This invention belongs to the field of explosion-proof technology for electrical equipment, specifically relating to an observation device for use with an explosion-proof electrical control box. Background Technology

[0002] Explosion-proof electrical control boxes are a common type of device in mines, consisting of an explosion-proof enclosure. The enclosure contains components that ignite an explosive gas atmosphere, can withstand the pressure generated by an internal explosion, and prevents the explosion from propagating to the surrounding explosive gas atmosphere.

[0003] For this type of casing, the accompanying observation device must not only meet the observation function, but also meet the explosion-proof requirements. Specifically, it must meet both the explosion-proof and explosion-resistant requirements.

[0004] The current practice involves installing glass, a copper gasket, and a pressure plate inside the explosion-proof electrical control box. The glass and copper gasket form an explosion-proof mating surface to meet explosion-proof requirements. However, since only one explosion-proof mating surface is used, its failure can cause the explosion-proof electrical control box to lose its explosion-proof capability. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention provide an observation device for use with an explosion-proof electrical control box to improve the explosion-proof performance of the electrical control box.

[0007] An observation device for an explosion-proof electrical control box according to an embodiment of the present invention is mounted on the electrical control box and includes:

[0008] The device comprises a mounting base, a glass component, and a pressure block assembly. The mounting base is snapped onto the housing of the electronic controller. The mounting base has mounting holes, and the glass component is disposed within the mounting holes. The pressure block assembly is connected to both the mounting base and the electronic controller housing, with the mounting base positioned between the pressure block assembly and the electronic controller housing.

[0009] The mounting base includes a first component and a second component connected together, wherein the radial dimension of the first component is larger than the radial dimension of the second component.

[0010] The contact surface between the outer peripheral surface of the first component and the inner wall surface of the electrical control box housing is the first explosion-proof mating surface.

[0011] The contact surface between the outer peripheral surface of the second component and the housing of the electronic controller forms a second explosion-proof mating surface.

[0012] The contact surface between the pressure block assembly and the electronic controller housing forms a third explosion-proof bonding surface.

[0013] The first component has a contact surface with the mounting base in the direction of extension of the mounting base and on the side of the second connector that contacts the mounting base to form a fourth explosion-proof mating surface.

[0014] The first explosion-proof mating surface is not parallel to the second and fourth explosion-proof mating surfaces, respectively, and the fourth explosion-proof mating surface is not parallel to the first and second explosion-proof mating surfaces, respectively. An observation device is used with the explosion-proof electrical control box in an embodiment of the present invention to improve the explosion-proof performance of the electrical control box.

[0015] In some embodiments, the extending direction of the mounting base is a first direction, and the mounting hole is divided into a first segment and a second segment that communicate with each other along the first direction, wherein the cross-sectional area of ​​the second segment is smaller than the cross-sectional area of ​​the first segment.

[0016] The glass component includes a glass piece and a first gasket piece. The first gasket piece and the glass piece are disposed within the first segment. The first gasket piece is disposed on one side adjacent to the second segment, and the end of the first gasket piece away from the second segment is in contact with the glass piece. The pressing block assembly extends at least partially into the first segment and is in contact with the end of the glass piece away from the first gasket piece. The end of the second piece away from the first piece is provided with a limiting portion, and the limiting portion is in contact with the end of the first gasket piece away from the glass piece.

[0017] In some embodiments, the pressure block assembly includes a pressure cap component, a pressure block, and a gasket component. The pressure block portion is disposed in the first section, and the gasket component is disposed within the first section. One end of the gasket component is in contact with the glass component, the other end of the gasket component is in contact with one end of the pressure block, and the other end of the pressure block is in contact with the pressure cap component.

[0018] In some embodiments, the gasket component includes a first layer, a second layer, and a third layer, wherein the first layer is in contact with the pressure block, one end of the second layer is connected to the first layer, the other end of the second layer is connected to the third layer, and the third layer is in contact with the glass component.

[0019] The first layer is made of neoprene rubber (flame retardant), the second layer is made of styrene-butadiene rubber (wear resistant), and the third layer is made of styrene-butadiene rubber (cushioning).

[0020] In some embodiments, the pressure cap component includes a large pressure cap and a small pressure cap, the large pressure cap including a first vertical section, a first fastener, a first horizontal section, and a second vertical section.

[0021] The first vertical segment contacts the inner wall surface of the housing of the electronic controller, and the first fastener passes through the first vertical segment and is detachably connected to the inner wall surface of the housing. One end of the first vertical segment is connected to one end of the first horizontal segment, and the other end of the first horizontal segment is connected to one end of the second vertical segment. The first and second vertical segments extend along the width direction of the mounting base, and the first horizontal segment extends along the extension direction of the mounting base.

[0022] The small pressure cap includes a third vertical section, a second flat section, a fourth vertical section, and a second fastener. The second fastener passes through the second flat section and is connected to the mounting base. The third vertical section is attached to the end face of the housing opposite to the controller, with one end of the third vertical section in contact with the second flat section and the other end of the third vertical section connected to one end of the second flat section. The fourth vertical section is connected to the other end of the second vertical section.

[0023] The first vertical segment, the second vertical segment, the third vertical segment, and the fourth vertical segment extend along the width direction of the mounting base, while the first horizontal segment and the second horizontal segment extend along the extension direction of the mounting base.

[0024] In some embodiments, the observation device for the explosion-proof electrical control box further includes a first packing material. The first packing material is provided at one end of the pressure block adjacent to the mounting base and the gasket component, and the first packing material is in contact with the mounting base and the gasket component.

[0025] In some embodiments, the observation device for the explosion-proof electrical control box further includes a second packing material. The end of the pressure block that is away from the gasket component and in contact with the small pressure cap is provided with the second packing material, and the second packing material is in contact with the small pressure cap.

[0026] In some embodiments, the explosion-proof electrical control box and the accompanying observation device further include a third packing material. The third packing material is provided at one end of the mounting base adjacent to the large pressure cover and the mounting base, and the third packing material is in contact with the large pressure cover and the housing of the electrical controller.

[0027] In some embodiments, the capping component is made of carbon steel, the glass component is made of soda-lime tempered glass, and the first filler, the second filler, and the third seasoning are made of casting adhesive.

[0028] In some embodiments, the contact surface between the first gasket and the limiting portion is a fifth explosion-proof mating surface.

[0029] The contact surfaces of the pressure block, glass component, and first gasket component with the side wall surface of the first section form a sixth explosion-proof bonding surface.

[0030] The contact surface between the gasket component and the glass sheet forms a seventh explosion-proof bonding surface.

[0031] The sixth explosion-proof mating surface is not parallel to the seventh explosion-proof mating surface and the fifth explosion-proof mating surface, respectively. Attached Figure Description

[0032] Figure 1 This is a cross-sectional schematic diagram of the observation device used with the explosion-proof electrical control box according to an embodiment of the present invention.

[0033] Figure 2 This is a cross-sectional schematic diagram of the pressing block according to an embodiment of the present invention.

[0034] Figure 3 This is a cross-sectional schematic diagram of the gasket component according to an embodiment of the present invention.

[0035] Figure 4 This is a cross-sectional schematic diagram of a glass component according to an embodiment of the present invention.

[0036] Casing 1,

[0037] Mounting base 2, first piece 21, second piece 22, mounting hole 23, first section 231, second section 232.

[0038] Glass component 3, glass part 31, first gasket part 32,

[0039] Pressure block assembly 4, pressure cap component 41, large pressure cap 411, first vertical section 4111, first fastener 4112, first horizontal section 4113, second vertical section 4114, small pressure cap 412, third vertical section 4121, second horizontal section 4122, fourth vertical section 4123, second fastener 4124.

[0040] Pressure block 42, gasket component 43, first layer 431, second layer 432, third layer 433.

[0041] First packing material 5, second packing material 6, third packing material 7.

[0042] First explosion-proof mating surface 8, second explosion-proof mating surface 9, third explosion-proof mating surface 10, fourth explosion-proof mating surface 11.

[0043] Fifth explosion-proof mating surface 12, sixth explosion-proof mating surface 13, seventh explosion-proof mating surface 14. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] refer to Figures 1-4As shown, the explosion-proof electrical control box of the present invention is equipped with an observation device, which is installed on the electrical control box and includes:

[0046] The device comprises a mounting base 2, a glass component 3, and a pressure block assembly 4. The mounting base 2 is snapped onto the housing 1 of the electronic controller. The mounting base 2 has a mounting hole 23, and the glass component 3 is disposed within the mounting hole 23. The pressure block assembly 4 is connected to both the mounting base 2 and the housing 1 of the electronic controller, with the mounting base 2 positioned between the pressure block assembly 4 and the housing 1 of the electronic controller.

[0047] The mounting base 2 includes a first component 21 and a second component 22 connected together, wherein the radial dimension of the first component 21 is larger than the radial dimension of the second component 22.

[0048] The first explosion-proof mating surface 8 of the contact surface between the outer peripheral surface of the first component 21 and the inner wall surface of the electrical control box housing 1

[0049] The outer peripheral surface of the second component 22 forms a second explosion-proof mating surface 9 with the contact surface of the electronic controller housing 1.

[0050] The contact surface between the pressure block assembly 4 and the electrical controller housing 1 forms a third explosion-proof mating surface 10.

[0051] The first piece 21 has a contact surface with the mounting base 2 on the side of the mounting base 2 that is adjacent to the second connector in the extending direction of the mounting base 2, so as to form a fourth explosion-proof mating surface 11.

[0052] The first explosion-proof mating surface 8 is not parallel to the second explosion-proof mating surface 9 and the fourth explosion-proof mating surface 11, respectively. The fourth explosion-proof mating surface 11 is not parallel to the first explosion-proof mating surface 8 and the second explosion-proof mating surface 9, respectively.

[0053] An observation device is provided for the explosion-proof electrical control box in an embodiment of the present invention to improve the explosion-proof performance of the electrical control box.

[0054] Specifically, such as Figures 1 to 4 As shown, the mounting base 2 extends in the left and right direction. The mounting base 2 is snapped onto the housing 1 to install the glass component 3. The glass component 3 is set in the mounting hole 23 and is used to observe the components inside the electrical control box.

[0055] The right end of the first piece 21 is connected to the left end of the second piece 22. The first piece 21 and the second piece 22 can be annular or hollow tubular.

[0056] The first explosion-proof mating surface 8, formed by the outer peripheral surface of the first component 21 and the inner wall surface of the electrical control box housing 1, extends in the left-right direction.

[0057] A second explosion-proof mating surface 9 is formed between the outer peripheral surface of the second component 22 and the housing 1 of the electronic controller. The second explosion-proof mating surface 9 extends in the left-right direction.

[0058] A third explosion-proof mating surface 10 is formed between the pressure block assembly 4 and the electronic controller housing 1, and the third explosion-proof mating surface 10 extends in the vertical direction.

[0059] The first piece 21, on its end face adjacent to the second connector in the extending direction of the mounting base 2, contacts the mounting base 2 to form a fourth explosion-proof mating surface 11. The fourth explosion-proof mating surface 11 extends in the vertical direction.

[0060] When a fire or explosion occurs inside the electrical control box, the flames enter the first explosion-proof joint surface 8 from the third explosion-proof joint surface 10. Because the third explosion-proof joint surface 10 and the first explosion-proof joint surface 8 are not parallel, the flames are blocked to a certain extent.

[0061] Then, either from the third explosion-proof mating surface 10, the flame enters the fourth explosion-proof mating surface 11. Since the third explosion-proof mating surface 10 and the fourth explosion-proof mating surface 11 are not parallel, the flame is again obstructed to a certain extent.

[0062] Then, it can enter the second explosion-proof joint surface 9 from the fourth explosion-proof joint surface 11. Since the second explosion-proof joint surface 9 and the fourth explosion-proof joint surface 11 are not parallel, the flame is blocked to a certain extent, thereby improving the explosion-proof performance of the electrical control box.

[0063] The observation device for the explosion-proof electrical control box in the embodiment of the present invention is configured such that the radial dimension of the first piece 21 is greater than that of the second piece 22, so that the mating surfaces of the first piece 21, the second piece 22 and the pressure block assembly 4 with the mounting base 2 form a tortuous flame channel, so that the impact of the flame or explosion is blocked to a certain extent again, thereby improving the explosion-proof performance of the electrical control box.

[0064] In some embodiments, the extending direction of the mounting base 2 is a first direction, and the mounting hole 23 is divided along the first direction into a first segment 231 and a second segment 232 that are interconnected. The cross-sectional area of ​​the second segment 232 is smaller than the cross-sectional area of ​​the first segment 231.

[0065] The glass component 3 includes a glass piece 31 and a first gasket piece 32. The first gasket piece 32 and the glass piece 31 are disposed within the first segment 231. The first gasket piece 32 is disposed on the side adjacent to the second segment 232, and the end of the first gasket piece 32 away from the second segment 232 is in contact with the glass piece 31. The pressure block assembly 4 extends at least partially into the first segment 231 and is in contact with the end of the glass piece 31 away from the first gasket piece 32. The end of the second piece 22 away from the first piece 21 is provided with a limiting part, and the limiting part is in contact with the end of the first gasket piece 32 away from the glass piece 31.

[0066] Specifically, such as Figures 1 to 4As shown, the first direction is the left-right direction. The mounting hole 23 is divided into a first segment 231 and a second segment 232 along the first direction. The right end of the first segment 231 is connected to the left end of the second segment 232. Both the first segment 231 and the second segment 232 extend along the left-right direction.

[0067] The cross-sectional area of ​​the second segment 232 is smaller than that of the first segment 231. This can be understood as the radial dimension of the second segment 232 being smaller than that of the first segment 231.

[0068] The first gasket 32 ​​is disposed between the second section 232 and the glass piece 31 to support the glass piece 31. The right end of the first gasket 32 ​​contacts the limiting part 221 to limit the first gasket 32 ​​in the left and right directions and prevent the impact force of the electrical control box shell from being directly transmitted to the glass piece. The cross-sectional area of ​​the second section 232 is smaller than that of the first section 231 to limit the glass piece and the first gasket 32, so as to prevent the impact force inside the electrical control box from impacting the glass piece or the first gasket 32 ​​and causing the glass piece or the first gasket 32 ​​to be ejected from the shell 1, thereby improving the explosion-proof performance of the electrical control box and its stability during use.

[0069] In some embodiments, the pressure block assembly 4 includes a pressure cover component 41, a pressure block 42, and a gasket component 43. The pressure block 42 is partially disposed in the first section 231, and the gasket component 43 is disposed within the first section 231. One end of the gasket component 43 is in contact with the glass component 31, and the other end of the gasket component 43 is in contact with one end of the pressure block 42. The other end of the pressure block 42 is in contact with the pressure cover component 41.

[0070] Specifically, such as Figures 1 to 4 As shown, the pressure cap component 41 is located at the left end of the mounting base 2, and the pressure block 42 is at least partially located within the first section 231. The left end of the pressure block 42 is in contact with the pressure cap component 41, and the right end of the pressure block 42 is in contact with the left end of the gasket component 43. The gasket component 43 is located between the pressure block 42 and the glass component 31 so that the pressure block 42 and the glass component 31 are not in direct contact, thus buffering the force transmitted by the pressure block 42, preventing the glass from being directly subjected to the force of the pressure block 42, and improving the stability of the glass component 31 in use.

[0071] In some embodiments, the gasket component 43 includes a first layer 431, a second layer 432, and a third layer 433. The first layer 431 is in contact with the pressure block 42, one end of the second layer 432 is connected to the first layer 431, the other end of the second layer 432 is connected to the third layer 433, and the third layer 433 is in contact with the glass component 31.

[0072] The first layer 431 is made of neoprene rubber (flame retardant), while the second layer 432 and the third layer 433 are made of styrene-butadiene rubber (cushioning).

[0073] Specifically, such as Figures 1 to 4As shown, the left end of the first layer 431 is in contact with the right end of the pressure block 42, the right end of the first layer 431 is in contact with the second layer 432, the right end of the second layer 432 is in contact with the third layer 433, and the right end of the third layer 433 is in contact with the glass component 31.

[0074] The first layer, made of 431 material, is neoprene rubber to provide flame retardant properties and prevent flames and high-temperature gases from spreading through the explosion-proof interface.

[0075] The second layer 432 and the third layer 433 are made of styrene-butadiene rubber, which has certain wear resistance and mechanical strength, and can also absorb a certain amount of impact force, reducing the impact of vibration on the glass component 31. At the same time, the layered arrangement of the second layer 432 and the third layer 433 provides redundant protection. Even if the second layer 432 or the third layer 433 fails, the other third layer 433 and the second layer 432 can still maintain their functions, improving the overall reliability.

[0076] In some embodiments, the pressure cap component 41 includes a large pressure cap 411 and a small pressure cap 412. The large pressure cap 411 includes a first vertical section 4111, a first fastener 4112, a first horizontal section 4113, and a second vertical section 4114.

[0077] The first vertical segment 4111 contacts the inner wall of the housing 1 of the electronic controller, and the first fastener 4112 passes through the first vertical segment 4111 and is detachably connected to the inner wall of the housing 1. One end of the first vertical segment 4111 is connected to one end of the first horizontal segment 4113, and the other end of the first horizontal segment 4113 is connected to one end of the second vertical segment. The first vertical segment 4111 and the second vertical segment 4114 extend along the width direction of the mounting base 2, and the first horizontal segment 4113 extends along the extension direction of the mounting base 2.

[0078] The small pressure cap 412 includes a third vertical section 4121, a second flat section 4122, a fourth vertical section 4123, and a second fastener 4124. The second fastener 4124 passes through the second flat section 4122 and is connected to the mounting base 2. The third vertical section 4121 is fitted onto the end face of the mounting base 2 opposite to the housing 1 of the electronic controller, with one end of the third vertical section 4121 in contact with the second flat section 4122 and the other end of the third vertical section 4121 connected to one end of the second flat section 4122. The fourth vertical section 4123 is connected to the other end of the second vertical section.

[0079] The first vertical segment 4111, the second vertical segment, the third vertical segment 4121, and the fourth vertical segment 4123 extend along the width direction of the mounting base 2, while the first horizontal segment 4113 and the second horizontal segment 4122 extend along the extension direction of the mounting base 2. The first vertical segment 4111, the second vertical segment, the third vertical segment 4121, and the fourth vertical segment 4123 extend in the vertical direction, while the first horizontal segment 4113 and the second horizontal segment 4122 extend along the extension direction of the mounting base 2.

[0080] Specifically, such as Figures 1 to 4 As shown, the right end face of the first vertical section 4111 is in contact with the inner wall of the electrical control box housing 1, and forms the third explosion-proof joint surface 10.

[0081] The first vertical segment 4111 extends in the vertical direction, and one end of the first vertical segment 4111 is connected to the right end of the first horizontal segment 4113, while the left end of the first horizontal segment 4113 is connected to the end of the second vertical segment adjacent to the first vertical segment 4111. The first fastener 4112 passes through the first horizontal segment 4113 and is connected to the mounting base 2 to form a repeatedly tortuous flame channel, thereby improving the explosion-proof performance.

[0082] The third vertical segment 4121 extends vertically, with one end connected to the right end of the second horizontal segment 4122, and the left end of the second horizontal segment 4122 connected to the end of the fourth vertical segment 4123 adjacent to the third vertical segment 4121. The second fastener 4124 passes through the second horizontal segment 4122 and is connected to the mounting base 2 to form a repeatedly tortuous flame channel, improving explosion-proof performance.

[0083] Furthermore, the observation device for the explosion-proof electrical control box also includes a first packing 5. The first packing 5 is provided at one end of the pressure block 42 adjacent to the mounting base 2 and the gasket component 43, and the first packing 5 is in contact with the mounting base 2 and the gasket component 43. When a fire or explosion occurs inside the electrical control box, the first packing 5 blocks the flames transmitted between the pressure block 42 and the gasket, as well as between the gasket and the first component 21, thereby improving the explosion-proof performance.

[0084] Furthermore, the observation device for the explosion-proof electrical control box also includes a second packing 6. The end of the pressure block 42 that is away from the gasket component 43 and in contact with the small pressure cover 412 is provided with the second packing 6, and the second packing 6 is in contact with the small pressure cover 412.

[0085] When a fire or explosion occurs inside the electrical control box, the second seasoning blocks the flame transmitted through the contact surface between the small pressure cap 412 and the left section of the pressure block 42, thereby improving the explosion-proof performance.

[0086] Furthermore, the observation device for the explosion-proof electrical control box also includes a third packing 7. The third packing 7 is provided at one end of the mounting base 2 near the large pressure cover 411 and the housing 1 of the electrical controller. The third packing 7 is in contact with the large pressure cover 411 and the housing 1 of the electrical controller. When a fire or explosion occurs inside the electrical control box, the third packing 7 blocks the flames between the large pressure cover 411 and the outer peripheral surface of the first piece 21 and between the first vertical section 4111 and the housing 1, thereby improving the explosion-proof performance.

[0087] In some embodiments, the pressure cap component 41 is made of carbon steel, the glass component 31 is made of soda-lime tempered glass, and the first filler 5, the second filler 6, and the third additive are made of casting adhesive. The glass component is made of soda-lime tempered glass to improve explosion-proof performance. The pressure cap component 41 is made of carbon steel, which has a certain tensile strength to withstand a certain deformation without breaking, thus improving stability during explosion-proof operation. The first filler 5, the second filler 6, and the third additive are made of casting adhesive, which are used to fill the gaps between the pressure block 42 and the small pressure cap 412, between the mounting base 2 and the first component 21 and the large pressure cap 411, and between the gasket component 43 and the first component 21 and the pressure block 42, providing sealing and cushioning functions.

[0088] In some embodiments, the contact surface between the first gasket 32 ​​and the limiting part 221 is the fifth explosion-proof bonding surface 12, the contact surface between the pressure block 42 and the glass part 31 and the first gasket 32 ​​and the first segment 231 forms the sixth explosion-proof bonding surface 13, and the contact surface between the gasket part 43 and the glass sheet 31 forms the seventh explosion-proof bonding surface 14. The sixth explosion-proof bonding surface 13 is not parallel to the seventh explosion-proof bonding surface 14 and the fifth explosion-proof bonding surface 12, respectively.

[0089] When a fire or explosion occurs inside the electrical control box, the flame enters the sixth explosion-proof joint surface 13 from the seventh explosion-proof joint surface 14. Since the seventh explosion-proof joint surface 14 and the sixth explosion-proof joint surface 13 are not parallel, the flame is blocked to a certain extent. Then, it enters the fifth explosion-proof joint surface 12 from the sixth explosion-proof joint surface 13. Since the sixth explosion-proof joint surface 13 and the fifth explosion-proof joint surface 12 are not parallel, the flame is blocked to a certain extent again, thereby improving the explosion-proof performance of the electrical control box.

[0090] The observation device for the explosion-proof electrical control box in the embodiments of the present invention forms a fifth explosion-proof mating surface 12, a sixth explosion-proof mating surface 13, and a seventh explosion-proof mating surface 14 by setting a first gasket 32, a glass component 31, and a gasket component 43. The sixth explosion-proof mating surface 13 is not parallel to the seventh explosion-proof mating surface 14 and the fifth explosion-proof mating surface 12, so as to block the flame transmission process and improve the explosion-proof performance of the electrical control box.

[0091] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0092] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0093] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0094] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0095] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0096] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An observation device for use with an explosion-proof electrical control box, mounted on the electrical control box, characterized in that, include: The device comprises a mounting base (2), a glass component (3), and a pressure block assembly (4). The mounting base (2) is fitted onto the housing (1) of the electronic controller. The mounting base (2) has a mounting hole (23). The glass component (3) is disposed within the mounting hole (23). The pressure block assembly (4) is connected to both the mounting base (2) and the electronic controller housing (1), and the mounting base (2) is positioned between the pressure block assembly (4) and the electronic controller housing (1). The mounting base (2) includes a first component (21) and a second component (22) connected together, wherein the radial dimension of the first component (21) is larger than the radial dimension of the second component (22). The first explosion-proof mating surface (8) is formed by the contact surface between the outer peripheral surface of the first component (21) and the inner wall surface of the electrical control box housing (1). The contact surface between the outer peripheral surface of the second component (22) and the housing (1) of the electronic controller forms a second explosion-proof mating surface (9). The contact surface between the pressure block assembly (4) and the electronic controller housing (1) forms a third explosion-proof mating surface (10). The first piece (21) forms a fourth explosion-proof mating surface (11) with the mounting base (2) on the side end face adjacent to the second piece in the extending direction of the mounting base (2). The first explosion-proof mating surface (8) is not parallel to the second explosion-proof mating surface (9) and the fourth explosion-proof mating surface (11), respectively. The fourth explosion-proof mating surface (11) is not parallel to the first explosion-proof mating surface (8) and the second explosion-proof mating surface (9), respectively.

2. The observation device for the explosion-proof electrical control box according to claim 1, characterized in that, The extension direction of the mounting base (2) is a first direction, and the mounting hole (23) is divided into a first segment (231) and a second segment (232) that are interconnected along the first direction. The cross-sectional area of ​​the second segment (232) is smaller than that of the first segment (231). The glass component (3) includes a glass piece (31) and a first gasket piece (32). The first gasket piece (32) and the glass piece (31) are disposed within the first segment (231). The first gasket piece (32) is disposed on the side adjacent to the second segment (232), and the end of the first gasket piece (32) away from the second segment (232) is in contact with the glass piece (31). The pressing block assembly (4) extends at least partially into the first segment (231) and is in contact with the end of the glass piece (31) away from the first gasket piece. The end of the second piece (22) away from the first piece is provided with a limiting part (221), and the limiting part (221) is in contact with the end of the first gasket piece (32) away from the glass piece (31).

3. The observation device for the explosion-proof electrical control box according to claim 2, characterized in that, The pressure block assembly (4) includes a pressure cap component (41), a pressure block (42), and a gasket component (43). The pressure block (42) is partially disposed in the first section (231), and the gasket component (43) is disposed within the first section (231). One end of the gasket component (43) is in contact with the glass component (31), the other end of the gasket component (43) is in contact with one end of the pressure block (42), and the other end of the pressure block (42) is in contact with the cover component (41).

4. The observation device for the explosion-proof electrical control box according to claim 3, characterized in that, The gasket component (43) includes a first layer (431), a second layer (432), and a third layer (433). The first layer (431) is in contact with the pressure block (42). One end of the second layer (432) is connected to the first layer (431), and the other end of the second layer (432) is connected to the third layer (433). The third layer (433) is in contact with the glass component (31). The first layer (431) is made of chloroprene rubber, and the second layer (432) and the third layer (433) are made of styrene-butadiene rubber.

5. The observation device for the explosion-proof electrical control box according to claim 3, characterized in that, The pressure cap component (41) includes a large pressure cap (411) and a small pressure cap (412). The large pressure cap (411) includes a first vertical section (4111), a first fastener (4112), a first horizontal section (4113), and a second vertical section (4114). The first vertical segment (4111) contacts the inner wall of the housing (1) of the electronic controller, and the first fastener (4112) passes through the first vertical segment (4111) and is detachably connected to the inner wall of the housing (1). One end of the first vertical segment (4111) is connected to one end of the first horizontal segment (4113), and the other end of the first horizontal segment (4113) is connected to one end of the second vertical segment (4114). The first vertical segment (4111) and the second vertical segment (4114) extend along the width direction of the mounting base (2), and the first horizontal segment (4113) extends along the extension direction of the mounting base (2). The small pressure cap (412) includes a third vertical section (4121), a second flat section (4122), a fourth vertical section (4123), and a second fastener (4124). The second fastener (4124) passes through the second flat section (4122) and is connected to the mounting base (2). The third vertical section (4121) is attached to the end face of the mounting base (2) away from the housing (1) of the electronic controller. One end of the third vertical section (4121) is in contact with the second flat section (4122), and the other end of the third vertical section (4121) is connected to one end of the second flat section (4122). The fourth vertical section (4123) is connected to the other end of the second vertical section. The first vertical segment (4111), the second vertical segment, the third vertical segment (4121) and the fourth vertical segment (4123) extend along the width direction of the mounting base (2), and the first horizontal segment (4113) and the second horizontal segment (4122) extend along the extension direction of the mounting base (2).

6. The observation device for the explosion-proof electrical control box according to claim 5, characterized in that, It also includes a first filler (5), wherein the pressure block (42) is provided with the first filler (5) at one end adjacent to the mounting base (2) and the gasket component (43), and the first filler (5) is in contact with the mounting base (2) and the gasket component (43).

7. The observation device for use with the explosion-proof electrical control box according to claim 6, characterized in that, It also includes a second filler (6), and the end of the pressure block (42) away from the gasket component (43) and in contact with the small pressure cap (412) is provided with the second filler (6), and the second filler (6) is in contact with the small pressure cap (412).

8. The observation device for the explosion-proof electrical control box according to claim 7, characterized in that, It also includes a third packing (7), which is provided at one end of the mounting base (2) adjacent to the large pressure cap (411) and the mounting base (2), and the third packing (7) is in contact with the large pressure cap (411) and the housing (1) of the electronic controller.

9. The observation device for the explosion-proof electrical control box according to claim 8, characterized in that, The pressure cap component (41) is made of carbon steel, the glass component (31) is made of sodium-calcium tempered glass, and the first filler (5), the second filler (6), and the third filler (7) are made of casting adhesive.

10. The observation device for use with the explosion-proof electrical control box according to claim 2, characterized in that, The contact surface between the first gasket (32) and the limiting part (221) is the fifth explosion-proof mating surface (12). The contact surfaces of the pressure block (42), the glass piece (31), and the first gasket piece (32) with the side wall of the first segment (231) are the sixth explosion-proof bonding surface (13). The contact surface between the gasket component (43) and the glass sheet is the seventh explosion-proof bonding surface (14). The sixth explosion-proof mating surface (13) is not parallel to the seventh explosion-proof mating surface (14) and the fifth explosion-proof mating surface (12).

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