Explosion-proof operation box

Abstract

The utility model relates to the technical field of operation boxes, in particular to an explosion-proof operation box which comprises a box body. The front panel is arranged on the box body; the rear cover is arranged on the side wall, away from the front panel, of the box body; the control knob is arranged on the front panel; the control knob comprises a knob mounting plate arranged in the box body; the rotating shaft is arranged on the knob mounting plate; the knob cover is arranged on the rotating shaft; the fixed seat is arranged on the front panel; the rotating shaft penetrates through the fixed seat and is connected with the knob cover; a protruding part is arranged on the fixing base and protrudes out of the front panel. A groove is formed in the side, close to the front panel, of the knob cover and used for containing the protruding part. The rear cover is additionally arranged, so that assembly and maintenance are convenient. The front end of the fixed seat of the control knob protrudes out of the front panel and is matched with the groove of the knob cover, condensate water can be effectively prevented from entering the operation box by utilizing the air pressure principle, and the problem that an explosion-proof knob structure is easy to corrode and short-circuit due to assembly gaps caused by water inflow is solved.

Description

Technical Field

[0001] This application relates to the field of control box technology, and in particular to an explosion-proof control box. Background Technology

[0002] Explosion-proof control boxes are typically installed on downhole equipment and are used to operate the equipment. During operation, operators use control knobs on the explosion-proof control box to control the downhole equipment.

[0003] Traditional control boxes adopt an explosion-proof design and are a one-piece cavity, which is heavy and difficult to assemble and maintain. The explosion-proof knob structure has assembly gaps, through which condensation water can enter the control box and easily cause corrosion. Therefore, the performance is not ideal in environments with high humidity or continuous water accumulation. Utility Model Content

[0004] This application aims to at least address one of the technical problems in existing or related technologies: traditional control boxes adopt an explosion-proof design, are integral chambers, are heavy, are not easy to assemble and maintain, and have assembly gaps in the explosion-proof knob structure, allowing condensate to enter the control box through the gaps, which can easily cause corrosion. Therefore, their performance is not ideal in environments with high humidity or continuous water accumulation.

[0005] Therefore, this application provides an explosion-proof control box with an added rear cover for easy assembly and maintenance. The front end of the control knob's mounting base protrudes from the front panel and engages with the groove of the knob cover. Utilizing the principle of air pressure, this effectively prevents condensate from entering the control box, solving the problem of water ingress, corrosion, and short circuits caused by assembly gaps in explosion-proof knob structures.

[0006] An explosion-proof operating box according to an embodiment of this application includes: a box body; a front panel disposed on the box body; a rear cover disposed on the side wall of the box body away from the front panel; and a control knob disposed on the front panel. The control knob includes: a knob mounting plate disposed in the box body; a rotating shaft disposed on the knob mounting plate; a knob cover disposed on the rotating shaft; and a fixing seat disposed on the front panel. The rotating shaft passes through the fixing seat and is connected to the knob cover. The fixing seat has a protrusion that protrudes from the front panel. The knob cover has a groove near the front panel for accommodating the protrusion.

[0007] Optionally, the mounting bracket is interference-fitted with the front panel.

[0008] Optionally, the groove and the protrusion are clearance-fitted.

[0009] Optionally, a sealing ring is provided on the rotating shaft, and the sealing ring is located between the groove and the protrusion.

[0010] Optionally, a desiccant box is provided inside the box.

[0011] Optionally, a sealing cord is provided on the back cover.

[0012] Optionally, the back cover is equipped with an explosion-proof gland.

[0013] Optionally, a display screen is provided on the front panel.

[0014] Optionally, the display screen includes: a screen mounting plate disposed in the housing; a screen disposed on the screen mounting plate; and tempered glass disposed on the front panel, with the tempered glass located in front of the screen.

[0015] Optionally, the tempered glass is fitted with sealant.

[0016] One of the above technical solutions has at least the following advantages or beneficial effects:

[0017] An explosion-proof control box provided in this application includes: a box body; a front panel disposed on the box body; a rear cover disposed on the side wall of the box body away from the front panel; and a control knob disposed on the front panel. The control knob includes: a knob mounting plate disposed within the box body; a rotating shaft disposed on the knob mounting plate; a knob cover disposed on the rotating shaft; and a fixing seat disposed on the front panel. The rotating shaft passes through the fixing seat and connects to the knob cover. The fixing seat has a protrusion that protrudes from the front panel; the knob cover has a groove near the front panel to accommodate the protrusion. This application adds a rear cover for easier assembly and maintenance. The front end of the fixing seat of the control knob protrudes from the front panel and cooperates with the groove of the knob cover. Utilizing the principle of air pressure, this effectively prevents condensate from entering the control box, solving the problem of water ingress, corrosion, and short circuits in the assembly gaps of the explosion-proof knob structure. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This illustration shows one of the structural schematic diagrams of an explosion-proof control box provided in an embodiment of this application;

[0020] Figure 2 This is a second schematic diagram of the structure of an explosion-proof control box provided in an embodiment of this application;

[0021] Figure 3 This illustration shows a structural schematic diagram of a control knob in an explosion-proof control box according to an embodiment of this application;

[0022] Figure 4 This paper shows a schematic diagram of the display screen in an explosion-proof control box according to an embodiment of this application.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Cabinet; 12. Desiccant box; 2. Front panel; 3. Rear cover; 4. Control knob; 41. Knob mounting plate; 42. Rotating shaft; 43. Mounting base; 431. Protrusion; 44. Knob cover; 441. Groove; 45. Sealing ring; 5. Explosion-proof gland; 6. Display screen; 61. Screen mounting plate; 62. Screen; 63. Tempered glass. Detailed Implementation

[0025] To better explain and facilitate understanding of this application, a detailed description of the application is provided below with reference to the accompanying drawings and specific embodiments. The directional terms such as "front," "rear," "inner," and "outer" mentioned herein are used in conjunction with... Figure 1 and Figure 3 The orientation is used as a reference. The position of the front panel 2 relative to the rear cover 3 is defined as "front"; the position of the knob mounting plate 41 relative to the housing 1 is defined as "inner".

[0026] As mentioned above, coal mining is a crucial process for obtaining coal resources. It involves excavating a series of shafts to access the underground coal seam and then carrying out mining operations. The underground environment is characterized by high humidity, with frequent dripping and water droplets. This damp environment can lead to a decrease in the insulation resistance of electrical equipment, accelerating corrosion and aging, and shortening its lifespan. Furthermore, the presence of flammable and explosive gases such as methane underground poses a significant risk of explosion should electrical equipment generate sparks or arcs. Additionally, the underground air is filled with fine particles such as coal dust, which can easily cause poor contact and short circuits within electrical equipment. Long-term accumulation of dust can also lead to electrical fires or explosions. Therefore, explosion-proof control boxes are required for underground equipment.

[0027] However, traditional control boxes adopt an explosion-proof design and are an integral cavity, which is heavy and difficult to assemble and maintain. The explosion-proof knob structure has assembly gaps, through which condensate can enter the control box and easily cause corrosion. Therefore, the performance is not ideal in environments with high humidity or continuous water accumulation.

[0028] To address at least one of the technical problems existing in the prior art or related technologies, this application provides an explosion-proof operating box, comprising: a box body; a front panel disposed on the box body; a rear cover disposed on the side wall of the box body away from the front panel; and a control knob disposed on the front panel. The control knob includes: a knob mounting plate disposed within the box body; a rotating shaft disposed on the knob mounting plate; a knob cover disposed on the rotating shaft; and a fixing seat disposed on the front panel. The rotating shaft passes through the fixing seat and connects to the knob cover. The fixing seat has a protrusion that protrudes from the front panel; the knob cover has a groove near the front panel to accommodate the protrusion. This application adds a rear cover for easier assembly and maintenance. The front end of the fixing seat of the control knob protrudes from the front panel and cooperates with the groove of the knob cover. Utilizing the principle of air pressure, this effectively prevents condensate from entering the operating box, solving the problem of water ingress, corrosion, and short circuits in the assembly gaps of the explosion-proof knob structure.

[0029] The following description, with reference to the accompanying drawings, describes an engine hood support device according to some embodiments provided in this application.

[0030] See Figures 1 to 4 This application provides an explosion-proof operating box, comprising: a box body 1; a front panel 2 disposed on the box body 1; a rear cover 3 disposed on the side wall of the box body 1 away from the front panel 2; and a control knob 4 disposed on the front panel 2. The control knob 4 includes: a knob mounting plate 41 disposed in the box body 1; a rotating shaft 42 disposed on the knob mounting plate 41; a knob cover 44 disposed on the rotating shaft 42; and a fixing seat 43 disposed on the front panel 2. The rotating shaft 42 passes through the fixing seat 43 and is connected to the knob cover 44. The fixing seat 43 is provided with a protrusion 431 that protrudes from the front panel 2. The knob cover 44 is provided with a groove 441 near the front panel 2, which is used to accommodate the protrusion 431.

[0031] The enclosure 1 adopts a standard cuboid structure. The cuboid structure is not only easy to manufacture, assemble and arrange on site, but also has a high internal space utilization rate. The outer shell material of enclosure 1 is made of high-strength and highly corrosion-resistant metal materials, such as carbon steel, alloy steel or stainless steel, which are seamlessly connected through a precision welding process, giving enclosure 1 excellent explosion-proof capability.

[0032] The front panel 2 is located at the front of the housing 1, serving as the main interface for operators. The front panel 2 is made of the same high-strength metal material as the housing 1 to ensure its stability and durability in harsh underground environments. Furthermore, mounting bolts are provided around the front panel 2. These bolts securely install the housing 1 into designated positions by penetrating corresponding holes in the front panel 2. This connection method can withstand significant external forces and vibrations, ensuring the stability and reliability of the front panel 2 during equipment operation.

[0033] The rear cover 3 is located at the rear end of the housing 1. Bolts are provided around the rear cover 3 to allow for detachable connection to the housing 1. This design facilitates assembly and maintenance by operators. By removing the rear cover 3, operators can easily access the components inside the housing 1 for cleaning, inspection, and replacement. Compared to traditional one-piece housings, this greatly simplifies the maintenance process, reduces maintenance costs, and improves the maintainability of the equipment.

[0034] The control knob 4 is used to control the operation of the downhole equipment. By rotating the control knob 4, the operator can operate the equipment to start, stop, and perform other actions to meet different work requirements. The control knob 4 consists of a knob mounting plate 41, a rotating shaft 42, a fixing base 43, and a knob cover 44. The knob mounting plate 41 serves as the basic support structure for the control knob 4 and is fixed inside the housing 1, providing a stable mounting platform for the rotating shaft 42. Furthermore, the knob mounting plate 41 contains a circuit board for transmitting signals generated by the rotation of the rotating shaft 42.

[0035] like Figure 3 As shown, the rotating shaft 42 is used to realize the rotation function of the knob. When the rotating shaft 42 rotates, it generates corresponding electrical signals. These signals are transmitted to the corresponding electronic devices through the circuit board in the knob mounting plate 41, thereby completing the corresponding operation control.

[0036] The knob cover 44 is the part that the operator directly contacts and operates. It is used to drive the rotating shaft 42 to rotate. The knob cover 44 can drive the rotating shaft 42 to rotate synchronously through connecting parts such as set screws, screws, and pins, or it can drive the rotating shaft 42 to rotate asynchronously through bearings, gears, splines, etc.

[0037] Furthermore, the knob cover 44 can be designed with different appearances according to different functions to facilitate operation. For example, the knob cover 44 is equipped with a lever, which can control the loading and unloading of the vehicle. Pushing it to the right unloads the vehicle, that is, the vehicle's moving cargo box moves backward, and pushing it to the left loads the vehicle, that is, the vehicle's moving cargo box moves forward. The knob cover 44 is in the shape of a straight line, which can control the vehicle's auxiliary drive function. Rotating it 90° to the right, that is, the straight line is in the horizontal state, which is open, and rotating it 90° to the left, that is, the straight line is in the vertical state, which is closed. The knob cover 44 can also adopt a large-diameter knurled design. This knob can control the power switch. Rotating it 45° clockwise turns on the low voltage, rotating it another 45° turns on the high voltage, and rotating it counterclockwise turns off the corresponding function, etc.

[0038] The mounting base 43 is used to fix the control knob 4 to a designated position on the front panel 2. Traditional control boxes lack a raised portion on the knob mounting base, allowing water to enter the control box through the gap between the mounting base and the rotating shaft. In this application, the mounting base 43 has a raised portion 431 at its front end. Because the raised portion 431 protrudes from the front panel 2, the gap between the groove 441 and the raised portion 431 is very small. The groove 441 contains air. Utilizing the principle of air pressure—that is, in a closed or nearly closed space, air forms a stable pressure—when external liquid attempts to enter this space, it is hindered by the internal air pressure, preventing water from entering the groove 441. This effectively prevents condensate from entering the control box, solving the problem of water ingress, corrosion, and short circuits in explosion-proof knob structures due to assembly gaps.

[0039] In one illustrative embodiment, the mounting base 43 is interference-fitted with the front panel 2. An interference fit is a common technique in mechanical assembly, referring to a situation where two parts are assembled with a certain amount of interference between their mating surfaces; that is, the size of one part is slightly larger than the mating surface size of the other part, resulting in a clamping force after assembly. The mating surface size of the mounting base 43 is designed to be slightly larger than that of the front panel 2. When the mounting base 43 is installed on the front panel 2, due to the interference, a clamping force is generated between the mating surfaces, thus achieving a tight connection.

[0040] In one illustrative embodiment, the groove 441 and the protrusion 431 are in a clearance fit. A clearance fit is a fit where there is a certain gap between the mating surfaces of two parts; that is, the mating surface of one part is slightly smaller than the mating surface of the other part, thus maintaining a certain space or gap between them after assembly. This type of fit is typically used in applications requiring relative movement, ease of assembly, or a certain allowance for thermal expansion. Since the knob cover 44 needs to rotate, meaning the groove 441 and the protrusion 431 need relative movement, the clearance fit ensures both smooth relative movement and a very small gap between the groove 441 and the protrusion 431. This utilizes the principle of air pressure to prevent water from entering the groove 441.

[0041] In one illustrative embodiment, a sealing ring 45 is provided on the rotating shaft 42, located between the groove 441 and the protrusion 431. The sealing ring 45 is an O-ring, which can be made of rubber, silicone, or other elastic materials, possessing good elasticity and sealing properties. It provides a sealing effect between two relatively moving parts, preventing liquids, gases, or dust from entering the gap. The sealing ring 45 is mounted on the rotating shaft 42 and located between the groove 441 and the protrusion 431. Even when the rotating shaft 42 rotates, the sealing ring 45, the groove 441, and the protrusion 431 together form a sealing area, effectively preventing condensate from entering the operating box.

[0042] In one illustrative embodiment, a desiccant box 12 is provided inside the housing 1. The desiccant box 12 contains desiccant to ensure that the inside of the housing 1 is dry and to prevent internal components from corroding and short-circuiting due to moisture. The main function of the desiccant is to absorb moisture from the air; by placing the desiccant in the desiccant box 12, the humidity inside the housing 1 can be effectively reduced.

[0043] Furthermore, the desiccant box 12 can be installed on the inner wall of the rear cover 3, which facilitates the periodic replacement of the desiccant. During periodic maintenance, operators can easily replace the desiccant by opening the rear cover 3, avoiding the cumbersome process of disassembling other parts to replace the desiccant.

[0044] In one illustrative embodiment, a sealing cord is provided on the rear cover 3. The sealing cord is a flexible strip of material used to provide a sealing effect. It is made of rubber, silicone, fiber, or other elastic and abrasion-resistant materials, and its main function is to prevent liquids, gases, or dust particles from entering through the gap between the rear cover 3 and the housing 1, thus ensuring a sealing effect.

[0045] In one illustrative embodiment, the rear cover 3 is equipped with an explosion-proof gland 5. The explosion-proof gland 5 is a device used to provide sealing and protection when cables are connected through a panel, and has additional safety features, enabling it to be used in explosive atmospheres without initiating or propagating an explosion. The explosion-proof gland 5 ensures a tight seal, preventing external contaminants such as dust and moisture from entering the enclosure 1 through the cable, and also prevents the occurrence or propagation of an explosion when used in an explosive atmosphere, ensuring the safety of personnel and equipment.

[0046] In one illustrative embodiment, such as Figure 2 As shown, a display screen 6 is provided on the front panel 2. The display screen 6 is used to enable the device to display information more intuitively, improve the operator's operating experience, and through the display screen 6, the device can present more information, thereby enhancing the functionality and practicality of the device.

[0047] In one illustrative embodiment, such as Figure 4 As shown, the display screen 6 includes: a screen mounting plate 61, which is disposed in the housing 1; a screen 62, which is disposed on the screen mounting plate 61; and a tempered glass 63, which is disposed on the front panel 2 and is located in front of the screen 62.

[0048] Tempered glass 63 is placed in the central groove of the front panel 2 via two inner and outer partitions. A screen 62 is placed at the rear end of the front panel 2, and a screen mounting plate 61 is placed at the rear end of the screen 62. The screen mounting plate 61 is fastened with bolts, fixing the tempered glass 63 and the screen 62 to the front panel 2. The screen mounting plate 61 provides support and connection; the screen 62 is used to display images; the tempered glass 63 provides protection, resisting physical damage such as scratches and impacts, protecting the screen 62 from damage. Furthermore, the tempered glass 63 has high light transmittance, ensuring that the image displayed on the screen 62 is clear and bright.

[0049] In one illustrative embodiment, a sealant is applied to the tempered glass 63. The sealant is used at the joints between the tempered glass 63 and other components. The sealant fills the tiny gaps between the tempered glass 63 and other components, preventing moisture, dust, and other impurities from entering the interior of the display screen 6, thereby protecting the electronic components inside the display screen 6 from damage. The sealant not only provides a physical seal but also enhances the structural stability of the tempered glass 63, preventing damage to the tempered glass 63 due to external impacts or vibrations.

[0050] In the description of this application, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" 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.

[0053] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary model," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0054] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An explosion-proof operating box, characterized by comprising: The utility model relates to a kind of control knob and display screen of cabinet, including: Box (1); Front panel (2) is arranged on the box (1); Rear cover (3) is arranged on the side wall of the box (1) away from the front panel (2); Control knob (4) is arranged on the front panel (2); The control knob (4) includes: Knob mounting plate (41) is arranged in the box (1); Rotary shaft (42) is arranged on the knob mounting plate (41);Knob cover (44) is arranged on the rotary shaft (42);Fixed seat (43) is arranged on the front panel (2);The rotary shaft (42) passes through the fixed seat (43) and is connected with the knob cover (44); The fixed seat (43) is equipped with protruding portion (431), and the protruding portion (431) protrudes the front panel (2);The knob cover (44) is equipped with recess (441) close to the front panel (2) side, and the recess (441) is used to accommodate the protruding portion (431).

2. An explosion-proof operating box as claimed in claim 1, characterized in that The fixed seat (43) is interference fit with the front panel (2).

3. An explosion-proof operating box as claimed in claim 1, characterized in that The recess (441) is clearance fit with the protruding portion (431).

4. An explosion-proof operating box as claimed in claim 1, characterized in that The rotary shaft (42) is equipped with sealing ring (45), and the sealing ring (45) is located between the recess (441) and the protruding portion (431).

5. An explosion-proof operating box as claimed in claim 1, characterized in that The box (1) is equipped with desiccant box (12).

6. An explosion-proof operating box as claimed in claim 1, characterized in that The rear cover (3) is equipped with sealing rope.

7. An explosion-proof operating box as claimed in claim 1, characterized in that The rear cover (3) is equipped with anti-explosion type gland (5).

8. A flame-proof type operating box as claimed in claim 1, wherein, The front panel (2) is equipped with display screen (6).

9. A flame-proof type operating box as claimed in claim 8, characterized in that, The display screen (6) includes: screen mounting plate (61) is arranged in the box (1); Screen (62) is arranged on the screen mounting plate (61); Tempered glass (63) is arranged on the front panel (2), and the tempered glass (63) is located in front of the screen (62).

10. A flame-proof type operating box as claimed in claim 9, wherein, The tempered glass (63) is equipped with sealing glue.

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